JP2772451B2 - Cassette loading device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette loading device provided in a magnetic recording / reproducing device or the like, and more particularly to a cassette loading device which can be effectively used in a type in which a cassette is loaded and discharged in an upright position. About.

[0002]

2. Description of the Related Art A conventional cassette loading apparatus is shown in FIGS.
It will be described based on. First, the structure will be described with reference to FIGS. 7A and 7B show the cassette holder in a state where the magnetic recording / reproducing apparatus is set up. FIG. 7A is a plan view of the right side of the cassette holder A, FIG. 7B is a side view of the bottom of the cassette holder A, and FIG. Is a front view, and (d) is a bottom view looking at the left side surface. FIG. 8 shows that the cassette holder A is
FIG. 8 is a side view showing a normal lying posture.

First, a cassette holder A will be described with reference to FIG.
Will be described. For convenience of explanation, the explanation will be made in a state of lying down. The slider 1 on which the cassette m is mounted has slider side plates 2 and 2 integrally and substantially vertically raised from both left and right ends thereof. Stopper pieces 1a and 1b for receiving the front end portion of the cassette m inserted therein are integrally raised on the left and right sides on the rear side of the slider 1. The first to third slider shafts 2 are provided on the right slider side plate 2.
a, 2b, and 2c are crimped in an outwardly protruding state. The first to third slider shafts 2a, 2b, 2c are also symmetrically crimped to the left slider side plate 2. Brackets 2A, 2A are integrally formed on the upper edges of the left and right slider side plates 2, 2 toward the inside, respectively, and the cassette m is elastically pressed against the slider 1 by each of the brackets 2A, 2A. Cassette pressing leaf springs 3 and 3 are fixed by caulking.

The right and left slider locks 4 and 4 formed in a substantially L-shape are attached to the second slider shafts 2b and 2b so as to be swingable around the outer surfaces of the slider side plates 2 and 2 respectively. ing. Each of the slider locks 4, 4 has a convex portion 4a, 4a at the center of the upper edge, and has a bottom plate portion 4 at the lower end, which goes under the slider side plates 2, 2 inward.
b, 4b are integrally formed by bending, and each bottom plate portion 4b,
The rising pieces 4c, 4c are integrally formed at the end of 4b. Slider lock springs 5, 5 are stretched between the slider side plates 2, 2 and the slider locks 4, 4, and the slider locks 4, 4 are pulled and urged so that the convex portions 4a, 4a thereof face upward. I have. In such a free state, the rising pieces 4c, 4c of the slider locks 4, 4 are located slightly forward of the stopper pieces 1a, 1b of the slider 1. Right the slider side plate 2 is swingably provided to the lock release lever 6 is a vertical-axis to unlock the closed state before the lid m ₁ of the cassette m.

Next, the frame section B will be described with reference to FIGS. A pair of left and right frames 8, 8 are erected near the left and right ends of the mechanical chassis 7 in parallel with each other. Flanges 8A, 8A are integrally formed on the upper edges of the frames 8, 8 inwardly. Top plates 9 and 10 are stretched between the front and rear ends of the upper edge of each frame 8 and 8, respectively. A cassette cover 11 for opening and closing the front end portions of the opposing gaps between the left and right frames 8, 8 is rotatably supported by holes in upper front corners of both frames 8, 8, and is closed by a cover closing spring (not shown). Biased in the direction. A down guide 12, which supports the bottom of the cassette m to be inserted and guides the lowering of the cassette m toward the cassette loading position, spans between the upper and lower intermediate positions of the front ends of the frames 8, 8 on the near side. Have been. Open lever 13 for opening the cassette front lid m ₁ on the right side of the lower surface position of the top plate 10 of the rear side
Is attached.

The first slider shafts 2a, 2a of the cassette holder A are inserted into and guided by the frames 8, 8.
The first guide holes 8a, 8a having a letter shape and the second guide holes 8b, 8b having an L shape for inserting and guiding the second slider shafts 2b, 2b are formed. That is, the cassette holder A has L-shaped guide holes 8a, 8a and 8b,
8b so as to be movable. Guide holes 8c, 8c with ribs for engaging and guiding the third slider shafts 2c, 2c when the cassette holder A is lowered are cut and raised in the frames 8, 8 inward. In the lower portion of the inner surface of the right frame 8, the drive rail 14
Are slidably mounted in the front-rear direction. The drive rail 14 is formed with a horizontally elongated hole 14a for allowing the drive rail 14 to slide back and forth through a main shaft 15 to be described later, and receives a driving force for sliding. A passive rack gear 14b is formed.
An L-shaped guide portion 14d having an upper end portion in a vertical direction and a lower end portion in a horizontal direction is formed at a position on the near side of the drive rail 14 above the elongated hole 14a. The horizontal portion of the L-shaped guide portion 14d is located on the near side with respect to the vertical portion. The L-shaped guide portion 14d is formed as a substantially arc-shaped long hole of a quarter. The L-shaped guide portion 14d of the drive rail 14 is for driving a right drive arm 16 described later. Note that such a drive rail 14 is provided only on the right side.

A main shaft 15 is hung over the lower ends of the frames 8, 8 and is rotatably supported by the shaft. The base end portion of the right drive arm 16 is fixed to the main shaft 15 inside the right frame 8 and immediately inside the drive rail 14. The base end portion of the left drive arm 16 is fixed to the main shaft 15 immediately near the inside of the left frame 8. Left and right drive arms 16, 1 with respect to main shaft 15
6 have the same mounting phase and are parallel to each other, so that both drive arms 16 and 16 rotate integrally in synchronization. On the side surface of the drive arm 16 on the right side, a passive portion 16b that is slidably guided by engaging with the L-shaped guide portion 14d of the drive rail 14 is integrally projected.

Each of the drive arms 16 has an elongated hole 16a extending in the longitudinal direction thereof, and a first slider shaft inserted into the first guide holes 8a of the frames 8, 8. 2a, 2a are elongated holes 16a, 16a
It is also inserted. And both drive arms 16,
To 16, cassette pressure springs 18, 18 formed of leaf springs for pressing the first slider shafts 2 a, 2 a in a counterclockwise direction are attached.

A lower end portion of the lid open arm 19 for opening the cassette cover 11 is rotatably supported at a lower portion of the left frame 8. This lid open arm 1
The upper end of 9 is in a state capable of contacting the cassette cover 11, and the lower end is in a state of being able to contact a cam (not shown) provided on the left drive arm 16. In addition,
Such a lid open arm 19 is provided only on the left side.

The passive rack gear 1 on the drive rail 14
Reference numeral 4b meshes with a pinion gear 21 rotatably supported by a bottom plate portion 8B of the right frame 8 via a shaft 20.

A drive motor (not shown) is a pinion gear 2
It is linked to 1.

A switch lever 24 is pivotally supported on a bottom plate 8B of the right frame 8 via a shaft 25 so as to be swingable. One end of the switch lever 24 is connected to the drive rail 14.
And the other end can be in contact with the switch 26 attached to the right frame 8. Cassette stays 27 for placing and supporting the bottom of the loaded cassette m are planted in the mechanical chassis 7 at four positions in front, rear, left and right.

Next, the operation of the cassette loading device configured as described above will be described with reference to FIGS. The description of the operation in this case is also made in the sideways posture for convenience. First, as shown in FIG.
Is inserted along the down guide 12, and is placed on the slider 1 of the cassette holder A and further inserted to the back.

The rear end of the cassette m is brought into contact with the rising pieces 4c, 4c (see FIG. 7) of the slider locks 4, 4, and the slider locks 4, 4 are moved to the slider lock springs 5, 5.
5, and the cassette m further slides to the rear side to slide the stopper pieces 1 a and 1 b of the slider 1.
(See FIG. 7), and the sliding on the slider 1 is stopped. Further, the cassette m is pressed against the slider 1 from above by the left and right cassette pressing leaf springs 3,3. As a result, the cassette m is stably held by the cassette holder A. When the slider locks 4 and 4 are swung clockwise, the protrusions 4a and 4a
Are released from the engagement state with the holes in the flanges 8A, 8A, and the locked state of the cassette holder A is released.
At the start of the insertion of the cassette m, the front end portion of the cassette m opens and rotates the cassette cover 11 against a cover closing spring (not shown). In that state, the lid open arm 1
The upper end of 9 is separated from the cassette cover 11.

When the cassette m is further pushed in, the state shown in FIG. 10 is obtained. That is, the cassette holder A moves a little deeper inside the frame portion B. At this time, the first slider shafts 2a, 2a of the cassette holder A are guided by the first guide holes 8a, 8a of the left and right frames 8, 8,
The second guide shafts 8b, 8b have second slider shafts 2b, 2b.
b is guided. When the first slider shafts 2a, 2a move to the back side, the first slider shafts 2a, 2a
The right and left drive arms 16, 16, which are inserted through the long holes 16 a, are synchronously rotated counterclockwise around the axis of the main shaft 15 artificially. As the right drive arm 16 rotates counterclockwise,
The passive portion 16b of the right drive arm 16 presses the vertical portion of the L-shaped guide portion 14d formed on the drive rail 14 toward the back. As a result, the drive rail 14 slides slightly backward. At this time, the output shaft of the drive motor (not shown) is rotated via the pinion gear 21. However, at this stage, power has not been supplied to the motor yet. That is, the initial sliding of the drive rail 14 is allowed by idling of the motor.

When the drive rail 14 slides slightly to the rear,
A cam (not shown) provided on the drive rail 14 causes the switch lever 24 to swing about an axis 25 to switch the switch 2.
6 is inverted from the OFF state to the ON state. As a result, a drive motor (not shown) is driven.
The driving torque of the motor is transmitted to the pinion gear 21, and the pinion gear 21 transfers the passive rack gear 1 of the drive rail 14.
4b is transmitted as a sliding driving force toward the back side.

When the drive rail 14 is forcibly moved toward the back by the sliding drive force, the vertical portion of the L-shaped guide portion 14d provided on the drive rail 14 is The portion 16b is pressed and moved toward the back side. As a result, the right drive arm 1
6 is rotated counterclockwise, and the left drive arm 16 integrated with the right drive arm 16 via the main shaft 15 is synchronously rotated in the same direction. . Then, the drive arms 16, 1
The first slider shafts 2a, 2a inserted into the long holes 16a, 16a are forcibly moved to the back side, and accordingly, the cassette holder A is moved to the back side together with the cassette m. At this time, the cassette holder A has the first slider shafts 2a, 2a having the L-shaped first guide holes 8a, 8a.
, And the second slider shafts 2b, 2b are guided by the L-shaped second guide holes 8b, 8b. The drive rail 14 does not hinder the slide of the drive rail 14 because the elongated hole 14a relatively slides on the main shaft 15.

In this way, when the cassette holder A is moved to the rear side to reach the state shown in FIG. 11, the third slider shafts 2c, 2c are engaged with the guide holes 8c, 8c with ribs. The first slider shafts 2a, 2a reach the bent portions of the first guide holes 8a, 8a, and the second slider shafts 2b, 2b reach the bent portions of the second guide holes 8b, 8b. Further, when this position is reached, the lock release lever 6 (see FIG. 7) of the cassette holder A is pressed by a cam (not shown) provided on the right frame 8 and swings inward, so that the front lid m _{1 of the} cassette m. Release the locked state of. Then, the protrusions 4a of the slider locks 4, 4
The slider locks 4 and 4 are further slid clockwise against the slider lock springs 5 and 5 so that the slider locks 4a come into sliding contact with the slightly lowered steps of the flanges 8A and 8A of the frames 8 and 8, respectively. parts 4b, 4b is to open a little cassette front lid m ₁ pushes up the cassette front lid m _1. Further, a cam (not shown) provided on the left drive arm 16 rotates the lid open arm 19 counterclockwise in synchronization with the drive arm 16 to bring the upper end of the lid open arm 19 into contact with the cassette cover 11. Therefore, the lid open arm 19 holds the cassette cover 11 in the open position instead of the cassette m.

The motor (not shown) is continuously driven,
The state shifts from the state of FIG. 11 to the state of FIG. That is, as the drive rail 14 is further moved to the rear side, the drive arms 16, 16 are further rotated counterclockwise, and the drive arms 16, 16 move the first slider shafts 2a, 2a to the first slider shafts 2a, 2a. The first guide holes 8a are pressed and moved downward along the vertical portions of the guide holes 8a. Accordingly, the second slider shafts 2b, 2b are also
Since the third slider shafts 2c, 2c are also moved downward along the ribbed guide holes 8c, 8c, the cassette holder A moves downward along with the cassette m. Will be moved. Then, the lid open arm 19 is moved to the left drive arm 16.
Is separated from a cam (not shown), and the urging force of a lid closing spring (not shown) is developed to
To the closed position and the lid open arm 19.
To the home position. Also, the cassette front lid m ₁
Since it comes into contact with the open lever 13 while descending, it is opened by the open lever 13. And
During this time, the passive portion 16b of the right drive arm 16
Slides downward and forward in the L-shaped guide portion 14d of the drive rail 14, and in the state of FIG. 12, the L-shaped guide portion 14d
In the horizontal direction.

The cassette m in the cassette holder A is mounted and supported on four cassette stays 27 in the mechanical chassis 7, and the cassette pressure spring 1 provided on the drive arms 16, 16 that is about to rotate counterclockwise.
Since the first and second sliders 8 and 18 forcibly press the first slider shafts 2a and 2a downward, the cassette m is pressed against the four cassette stays 27 with the cassette m slightly raised from the slider 1. Then, just at that timing, the cam (not shown) of the drive rail 14 that has pressed the switch lever 24 until then separates from the switch lever 24, so that the switch 26 is inverted from the ON state to the OFF state, and the drive motor is stopped. You.

The cassette crimping springs 18, 18
In the cassette loaded state in which the cassette m is pressed on the cassette stay 27, the first slider shafts 2a pressing the cassette pressing springs 18, 18 are moved.
Receive the reaction force of the clockwise return rotation from the cassette crimping springs 18,18. That is, a reaction force of the clockwise return rotation is applied to the drive arms 16 and 16. However, at this time, since the passive portion 16b of the right drive arm 16 is located at the lateral portion of the L-shaped guide portion 14d on the drive rail 14, the return rotation power applied to the drive arms 16, 16 is provided. Is received by the lateral portion of the L-shaped guide portion 14d. Therefore, the drive arm 1
The return rotation of the wheels 6 and 16 is regulated. This is because the drive rail 14 is slidable in the front-rear direction, but is restricted in the vertical direction. Further, since the return rotation power acts upward, the drive rail 14 does not slide back and forth along the front-rear direction, and the return slide of the drive rail 14 is also restricted.

Thus, the loading operation of the cassette m is completed. The ejection operation of the cassette m is performed in the reverse process.

[0023]

In the case where the above-mentioned conventional cassette loading device is of a type which is used upright, the attitude of the cassette holder A is as shown in FIGS.
As shown by the up and down arrows in (c), the slider 1 is in the vertical position, and the pair of slider side plates 2 and 2 is in the vertical position. The cassette m is naturally inserted and removed in the upright posture.

However, the cassette m originally has some clearance in the cassette holder A. Therefore, in the state in which the lower side m ₂ is placed supported on the lower side of the slider plate 2 of the inner surface 2j of the cassette m by the weight of the cassette m, the upper side m ₃ and the upper inner surface 2k of the slider side plates 2 of the cassette m between, so that the gap h _1, as shown in FIG. 7 (c) occurs. Upper slider side plate 2
Although unlocking lever 6 for releasing the locked state of the cassette front lid m ₁ is attached to the cassette m
Is shifted downward with respect to the cassette holder A in FIG.
Lock sufficiently longer acting release lever 6 with respect to the cassette m, it may become impossible before unlocking the lid m ₁ cassette. If the dimension in the width direction of the cassette m (the height in the upright position) is small, the tendency becomes stronger.

The cassette holder A and the frame B
There is some clearance between them. The cassette holder A is displaced downward with respect to the frame portion B and thus the mechanical chassis 7 due to the weight of the cassette holder A and the weight of the cassette m.

When the above-described displacement of the cassette m with respect to the cassette holder A and the downward displacement of the cassette holder A with respect to the mechanical chassis 7 are synergistically, when the cassette m in the upright position is loaded to the cassette loading position,
There is a possibility that the cassette m is shifted downward from the normal loading position and cannot be correctly loaded.

The present invention has been made in view of such circumstances, and when the cassette is inserted and loaded in a vertical position, the operation of the lock release lever is ensured, and the cassette is properly inserted. It is an object of the present invention to be able to correctly load a loading position.

[0028]

SUMMARY OF THE INVENTION A cassette loading device according to the present invention has a slider having a slider and a pair of slider side plates at both ends in a longitudinal direction of the cassette, for inserting and holding a cassette, and slidably moving the cassette holder. And a drive unit for moving the cassette holder between the cassette insertion / removal position and the cassette loading position, and inserting / removing the cassette in a vertical position with the slider in a vertical position. In the cassette loading device described above, a cassette spring is provided on a lower slider side plate of the pair of slider side plates so as to urge the lower side surface of the cassette in an upright position upward. It is.

[0029]

The cassette spring provided on the lower slider side plate urges the cassette in the upright position upward, so that the upper side surface of the cassette abuts or approaches the inner surface of the upper slider side plate. Therefore, the lock release lever on the upper slider side plate works favorably on the cassette and properly releases the lock on the cassette front lid.

Further, since the upward displacement of the cassette with respect to the cassette holder by the above-mentioned cassette spring cancels the downward displacement of the cassette holder with respect to the mechanical chassis, as a result, the cassette is correctly loaded to the proper loading position.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a cassette loading device in a magnetic recording / reproducing apparatus according to the present invention will be described below in detail with reference to the drawings.

The structure of the cassette loading device of this embodiment will be described with reference to FIGS. 1, 2 and 3. FIG. 1 shows the cassette holder with the magnetic recording / reproducing apparatus standing,
(A) is a plan view of the right side of the cassette holder A, (b) is a side view of the bottom, (c) is a front view,
(D) is a bottom view looking at the left side surface. FIG. 2 is a side view showing a state in which the cassette holder A is assembled to the frame portion B, and FIG. 3 is a side view showing a normal horizontal lying posture.

First, referring to FIG.
Will be described. For convenience of explanation, the explanation will be made in a state of lying down. As in the conventional example, the slider 1 on which the cassette m is mounted has slider side plates 2 and 2 integrally and substantially vertically raised from both left and right ends thereof. Stopper pieces 1a and 1b for receiving the front end portion of the cassette m inserted therein are integrally raised on the left and right sides on the rear side of the slider 1. The first to third slider side plates 2
The slider shafts 2a, 2b, 2c are crimped outwardly. The first to third slider shafts 2a, 2b, 2c are also symmetrically crimped to the left slider side plate 2.

As shown in FIG. 1 (b), a bracket 2A is integrally bent inward at the upper edge of the right slider side plate 2 which is the upper side in the upright position, and the cassette is attached to the bracket 2A. A cassette pressing leaf spring 3 for elastically pressing m against the slider 1 is caulked. In the vertical position, a cassette positioning piece 2B that is positioned in contact with the upper surface of the cassette m is integrally bent and formed inward at the upper edge of the left slider side plate 2, which is the lower side. Further, as shown in FIG. 1 (d), a square hole 2d is formed in the left slider side plate 2, and a base end portion of the cassette spring 3B extending inward through the hole 2d is formed on the outer surface of the slider side plate 2. It is stopped by caulking. This cassette spring 3B is shown in FIG.
As shown in the (c), it is to press urging the cassette m upward elastically brought into contact with the lower side surface m ₂ of the incoming inserted in vertical orientation cassette m.

The right and left slider locks 4 and 4 formed substantially in an L-shape are attached to the outer side surfaces of the respective slider side plates 2 and 2 so as to be swingable about the second slider shafts 2b and 2b. ing. Each of the slider locks 4, 4 has a convex portion 4a, 4a at the center of the upper edge, and has a bottom plate portion 4 at the lower end, which goes under the slider side plates 2, 2 inward.
b, 4b are integrally formed by bending, and each bottom plate portion 4b,
The rising pieces 4c, 4c are integrally formed at the end of 4b. Slider lock springs 5, 5 are stretched between the slider side plates 2, 2 and the slider locks 4, 4, and the slider locks 4, 4 are pulled and urged so that the convex portions 4a, 4a thereof face upward. I have. In such a free state, the rising pieces 4c, 4c of the slider locks 4, 4 are located slightly forward of the stopper pieces 1a, 1b of the slider 1. The vertical orientation is provided swingably to the lock release lever 6 about the longitudinal axis for releasing the lock of the closed state before the lid m ₁ of the cassette m on the right side of the slider plate 2 the upper side.

Next, the frame section B will be described with reference to FIGS. A pair of left and right frames 8, 8 are erected near the left and right ends of the mechanical chassis 7 in parallel with each other. Flanges 8A, 8A are integrally formed on the upper edges of the frames 8, 8 inwardly. Top plates 9 and 10 are stretched between the front and rear ends of the upper edge of each frame 8 and 8, respectively. A cassette cover 11 for opening and closing the front end portions of the opposing gaps between the left and right frames 8, 8 is rotatably supported by holes in upper front corners of both frames 8, 8, and is closed by a cover closing spring (not shown). Biased in the direction. A down guide 12, which supports the bottom of the cassette m to be inserted and guides the lowering of the cassette m toward the cassette loading position, spans between the upper and lower intermediate positions of the front ends of the frames 8, 8 on the near side. Have been. Open lever 13 for opening the cassette front lid m ₁ on the right side of the lower surface position of the top plate 10 of the rear side
Is attached.

The first slider shafts 2a, 2a of the cassette holder A are inserted into and guided by the frames 8, 8, respectively.
The first guide holes 8a, 8a having a letter shape and the second guide holes 8b, 8b having an L shape for inserting and guiding the second slider shafts 2b, 2b are formed. That is, the cassette holder A has L-shaped guide holes 8a, 8a and 8b,
8b so as to be movable. Guide holes 8c, 8c with ribs for engaging and guiding the third slider shafts 2c, 2c when the cassette holder A is lowered are cut and raised in the frames 8, 8 inward. In the lower portion of the inner surface of the right frame 8, the drive rail 14
Are slidably mounted in the front-rear direction. The drive rail 14 is formed with a horizontally elongated hole 14a for allowing the drive rail 14 to slide back and forth through a main shaft 15 to be described later, and receives a driving force for sliding. A passive rack gear 14b is formed.
An L-shaped guide portion 14d having an upper end portion in a vertical direction and a lower end portion in a horizontal direction is formed at a position on the near side of the drive rail 14 above the elongated hole 14a. The horizontal portion of the L-shaped guide portion 14d is located on the near side with respect to the vertical portion. The L-shaped guide portion 14d is formed as a substantially arc-shaped long hole of a quarter. The L-shaped guide portion 14d of the drive rail 14 is for driving a right drive arm 16 described later. Note that such a drive rail 14 is provided only on the right side.

A main shaft 15 is hung over the lower ends of the frames 8, 8 and is rotatably supported by the shaft. The base end portion of the right drive arm 16 is fixed to the main shaft 15 inside the right frame 8 and immediately inside the drive rail 14. The base end portion of the left drive arm 16 is fixed to the main shaft 15 immediately near the inside of the left frame 8. Left and right drive arms 16, 1 with respect to main shaft 15
6 have the same mounting phase and are parallel to each other, so that both drive arms 16 and 16 rotate integrally in synchronization. On the side surface of the drive arm 16 on the right side, a passive portion 16b that is slidably guided by engaging with the L-shaped guide portion 14d of the drive rail 14 is integrally projected. The L-shaped guide portion 14d of the drive rail 14 and the passive portion 16b of the right drive arm 16 engaging with the L-shaped guide portion 14d constitute a mechanism for interlocking the drive rail 14 and the drive arm 16.

Slots 16a, 16a are formed in the drive arms 16, 16 along the longitudinal direction thereof, and the first slider shaft inserted into the first guide holes 8a, 8a of the frames 8, 8 is formed. 2a, 2a are elongated holes 16a, 16a
It is also inserted. And both drive arms 16,
To 16, cassette pressure springs 18, 18 formed of leaf springs for pressing the first slider shafts 2 a, 2 a in a counterclockwise direction are attached.

A lower end portion of the lid open arm 19 for opening the cassette cover 11 is rotatably supported at a lower portion of the left frame 8. This lid open arm 1
The upper end of 9 is in a state capable of contacting the cassette cover 11, and the lower end is in a state of being able to contact a cam (not shown) provided on the left drive arm 16. In addition,
Such a lid open arm 19 is provided only on the left side.

Passive rack gear 1 on drive rail 14
Reference numeral 4b meshes with a pinion gear 21 rotatably supported by a bottom plate portion 8B of the right frame 8 via a shaft 20.

The drive motor (not shown) is a pinion gear 2
It is linked to 1.

A switch lever 24 is pivotally supported by a bottom plate 8 B of the right frame 8 via a shaft 25. One end of the switch lever 24 is connected to the drive rail 14.
And the other end can be in contact with the switch 26 attached to the right frame 8. Cassette stays 27 for placing and supporting the bottom of the loaded cassette m are planted in the mechanical chassis 7 at four positions in front, rear, left and right.

Next, the operation of the cassette loading device configured as described above will be described with reference to FIGS. Here, for convenience of explanation, the operation in the lying-down posture will be described.
First, as shown in FIG.
2 and placed on the slider 1 of the cassette holder A and further inserted all the way. The rear end of the cassette m contacts the rising pieces 4c, 4c (see FIG. 7) of the slider locks 4, 4 to swing the slider locks 4, 4 clockwise against the slider lock springs 5, 5. Then, the cassette m further slides to the rear side and abuts against the stopper pieces 1a and 1b (see FIG. 7) of the slider 1, and the sliding on the slider 1 is stopped. Further, the cassette m is prevented from coming out upward by the cassette positioning piece 2B on the left side, and is pressed from above by the slider 1 by the cassette pressing leaf spring 3 on the right side. As a result, the cassette m is stably held by the cassette holder A. When the slider locks 4 and 4 are swung clockwise, the projections 4a and 4a come out of engagement with the holes in the flanges 8A and 8A of the frames 8 and 8 and the locked state of the cassette holder A is released. You. At the start of the insertion of the cassette m, the front end portion of the cassette m opens and rotates the cassette cover 11 against a cover closing spring (not shown). In that state, the lid open arm 19
Is separated from the cassette cover 11.

When the cassette m is further pushed in, the state shown in FIG. 4 is obtained. That is, the cassette holder A moves a little deeper inside the frame portion B. At this time, the first slider shafts 2a, 2a of the cassette holder A are guided by the first guide holes 8a, 8a of the left and right frames 8, 8, and the second slider shafts 2b are guided by the second guide holes 8b, 8b. , 2b
Will be guided. When the first slider shafts 2a, 2a are moved to the rear side, the left and right drive arms 16, 16 which pass the first slider shafts 2a, 2a through the elongated holes 16a, 16a are synchronized with the main shaft. It is artificially rotated around the axis 15 in a counterclockwise direction. As the right drive arm 16 rotates counterclockwise, the passive portion 16b of the right drive arm 16
4 is pressed toward the rear side in the vertical direction of the L-shaped guide portion 14d. As a result, the drive rail 14 slides slightly backward. At this time, the output shaft of the drive motor (not shown) is rotated via the pinion gear 21. However, at this stage, power has not been supplied to the motor yet. That is, the initial sliding of the drive rail 14 is allowed by idling of the motor.

When the drive rail 14 slides slightly to the rear,
A cam (not shown) provided on the drive rail 14 causes the switch lever 24 to swing about an axis 25 to switch the switch 2.
6 is inverted from the OFF state to the ON state. As a result, a drive motor (not shown) is driven.
The driving torque of the motor is transmitted to the pinion gear 21, and the pinion gear 21 transfers the passive rack gear 1 of the drive rail 14.
4b is transmitted as a sliding driving force toward the back side.

When the drive rail 14 is forcibly moved to the rear side by the sliding drive force, the vertical portion of the L-shaped guide portion 14d provided on the drive rail 14 is The portion 16b is pressed and moved toward the back side. As a result, the right drive arm 1
6 is rotated counterclockwise, and the left drive arm 16 integrated with the right drive arm 16 via the main shaft 15 is synchronously rotated in the same direction. . Then, the drive arms 16, 1
The first slider shafts 2a, 2a inserted into the long holes 16a, 16a are forcibly moved to the back side, and accordingly, the cassette holder A is moved to the back side together with the cassette m. At this time, the cassette holder A has the first slider shafts 2a, 2a having the L-shaped first guide holes 8a, 8a.
, And the second slider shafts 2b, 2b are guided by the L-shaped second guide holes 8b, 8b. The drive rail 14 does not hinder the slide of the drive rail 14 because the elongated hole 14a relatively slides on the main shaft 15.

In this way, when the cassette holder A is moved to the rear side to reach the state shown in FIG. 5, the third slider shafts 2c, 2c engage with the guide holes 8c, 8c with ribs. The first slider shafts 2a, 2a reach the bent portions of the first guide holes 8a, 8a, and the second slider shafts 2b, 2b reach the bent portions of the second guide holes 8b, 8b. Also, when proceeding to this position, the cassette holder A
Unlocking lever 6 (see FIG. 7) is swung inwardly is pressed by a cam (not shown) provided on the right side of the frame 8, to release the locked state of the front lid m ₁ of the cassette m in. Then, the convex portions 4a, 4 of the slider locks 4, 4
a comes into sliding contact with the stepped portions of the flanges 8A, 8A of the frames 8, 8, which are slightly lowered.
4 is further swung clockwise against the slider lock springs 5, 5, and the bottom plates 4b, 4b are
₁ will be open a little cassette front lid m ₁ pushed up. A cam (not shown) provided on the left drive arm 16 connects the cover open arm 19 to the drive arm 1.
6, the upper end of the lid open arm 19 is brought into contact with the cassette cover 11 so that the cover open arm 19 holds the cassette cover 11 in the open position instead of the cassette m. Will do.

The motor (not shown) is continuously driven,
The state shifts from the state of FIG. 5 to the state of FIG. That is, as the drive rail 14 is further moved to the rear side, the drive arms 16, 16 are further rotated counterclockwise, and the drive arms 16, 16 move the first slider shafts 2a, 2a to the first slider shafts 2a, 2a. The first guide holes 8a are pressed and moved downward along the vertical portions of the guide holes 8a. Along with this,
The second slider shafts 2b, 2b are also connected to the second guide holes 8b, 8b.
b, the third slider shafts 2c, 2c are also moved downward along the ribbed guide holes 8c, 8c, so that the cassette holder A is moved downward together with the cassette m. Will be. Then, the lid open arm 19 is separated from the cam (not shown) of the drive arm 16 on the left side, and the urging force of the lid closing spring (not shown) is developed to rotate the cassette control lid 11 to the closed position and to open the lid open arm. 19 is returned to the origin position. Further, since the cassette front lid m ₁ comes into contact with the open lever 13 while descending, the cassette front lid m ₁ is opened by the open lever 13. During this time, the passive portion 16b of the right drive arm 16 slides downward and forward in the L-shaped guide portion 14d of the drive rail 14, and in the state of FIG. Part will be located.

The cassette m in the cassette holder A is mounted and supported on four cassette stays 27 in the mechanical chassis 7, and the cassette pressure spring 1 provided on the drive arms 16, 16 which is to be rotated counterclockwise.
Since the first and second sliders 8 and 18 forcibly press the first slider shafts 2a and 2a downward, the cassette m is pressed against the four cassette stays 27 with the cassette m slightly raised from the slider 1. Then, just at that timing, the cam (not shown) of the drive rail 14 that has pressed the switch lever 24 until then separates from the switch lever 24, so that the switch 26 is inverted from the ON state to the OFF state, and the drive motor is stopped. You.

In the cassette loaded state in which the cassette m is pressed on the cassette stay 27 by the cassette pressing springs 18, 18, the cassette pressing springs 18,
The first slider shafts 2a, 2a pressing the first spring 18 receive the reaction force of the clockwise return rotation from the cassette compression springs 18, 18. That is, a reaction force of the clockwise return rotation is applied to the drive arms 16 and 16. However, at this time, since the passive portion 16b of the right drive arm 16 is located at the lateral portion of the L-shaped guide portion 14d on the drive rail 14, the return rotation power applied to the drive arms 16, 16 is provided. Is received by the lateral portion of the L-shaped guide portion 14d. Therefore, the drive arm 16,
Reference numeral 16 restricts the return rotation. Drive rail 1
4 is slidable in the front-rear direction, but the position is regulated in the up-down direction. Further, since the return rotation power acts upward, the drive rail 14 does not slide back and forth along the front-rear direction, and the return slide of the drive rail 14 is also restricted.

Thus, the operation of loading the cassette m is completed. The ejection operation of the cassette m is performed in the reverse process.

When the cassette loading device of the above-described embodiment is of a type which is used upright, the attitude of the cassette holder A is as shown by the up and down arrows in FIGS. 1 (b) and 1 (c). , The slider 1 is in a vertical position, and the pair of slider side plates 2 and 2 is in a vertical position. The cassette m is naturally inserted and removed in the upright posture. Cassette m inserted into cassette holder A in the upright position
The lower side surface m ₂ of the cassette m comes into contact with a cassette spring 3B provided on the lower slider side plate 2, and the entire cassette m is pressed and urged upward by the cassette spring 3B, so that the upper side surface of the cassette m m ₃ contacts the inner surface 2 k of the upper slider side plate 2. In this state, the inner surface 2 of the lower side surface m ₂ and the lower side of the slider plate 2 cassettes m
A gap h ₀ is generated between the gap and j.

Since the upper side surface m _{3 of the} cassette m is in contact with the inner surface 2 k of the upper slider side plate 2, the lock release lever 6 (see FIG. 7) is provided on the right frame 8 in the state of FIG. and when it is pressed by an unillustrated cam swung inwardly, it is possible to reliably releasing operation of the locked state of the cassette front lid m _1.

[0055] The cassette holder A is its own weight and also be displaced downward by the weight of the cassette m, because the cassette m occurs the upward displacement of the clearance h ₀ min as described above, the downward displacement is displaced upward Thus, when loading the cassette m into the mechanical chassis 7, the cassette m can be correctly loaded to the proper loading position.

[0056]

As described above, according to the present invention, the cassette spring which presses and biases the cassette in the upright position upward is provided on the lower slider side plate. The operation of the lock release lever with respect to the front lid can be ensured, and the cassette can be correctly loaded to the proper loading position when loading the cassette onto the mechanical chassis.

[Brief description of the drawings]

FIG. 1 is a plan view, a side view, a front view, and a bottom view showing a structure of a cassette holder in a cassette loading device according to an embodiment of the present invention in an upright posture.

FIG. 2 is a side view showing the structure of the cassette loading device of the embodiment.

FIG. 3 is a side view of the cassette loading device of the embodiment in a horizontal lying position for explaining the operation.

FIG. 4 is a side view of the cassette loading device of the embodiment in a horizontal lying position for explaining the operation.

FIG. 5 is a side view of the cassette loading device in the embodiment in a horizontal lying position for explaining the operation;

FIG. 6 is a side view of the cassette loading device of the embodiment in a horizontal lying position for explaining the operation of the cassette loading device.

FIG. 7 is a plan view, a side view, a front view, and a bottom view showing a structure of a cassette holder in a cassette loading device according to a conventional example in an upright posture.

FIG. 8 is a side view showing the structure of a conventional cassette loading apparatus.

FIG. 9 is a side view of the conventional cassette loading apparatus in a horizontal lying position for explaining the operation thereof.

FIG. 10 is a side view of the conventional cassette loading device in a horizontal lying position for explaining the operation.

FIG. 11 is a side view of the conventional cassette loading apparatus in a horizontal lying position for explaining the operation of the cassette loading apparatus.

FIG. 12 is a side view of the conventional cassette loading apparatus in a horizontal lying position for explaining the operation of the cassette loading apparatus.

[Reference Numerals] A ...... cassette holder, B ...... frame unit, m ...... cassette, m ₂ ...... lower side, m ₃ ...... topside, 1 ......
Slider 2, slider side plate, 2a, 2b, 2c ...
Slider shaft, 2c ... hole, 2j ... inner surface of lower slider side plate, 2k ... inner surface of upper slider side plate, 2A ...
Bracket, 2B ... cassette positioning piece, 3 ... cassette pressing leaf spring, 3B ... cassette spring, 4 ...
... Slider lock, 5 ... Slider lock spring,
6 Lock release lever 7 Mechanical chassis 8
Frame, 8a, 8b ... L-shaped guide hole, 8c ...
Guide holes with ribs, 11 cascon lid, 12 down guide, 13 open lever, 14 drive rail, 14b passive rack gear, 14d L-shaped guide portion, 15 main shaft, 16: Drive arm, 16a: Slot, 16b: Passive part, 18: Cassette pressure spring, 19: Lid open arm, 21
...... Pinion gear, 24 ... Switch lever, 26 ...
Switch, the gap between the 27 ...... cassette stay, h ₀ ...... lower side of the lower side of the slider plate of the inner surface and the cassette

Claims (1)

(57) [Claims] 1. A cassette holder (A) having a slider (1) and a pair of slider side plates (2, 2) at both ends in the longitudinal direction for inserting and holding a cassette (m), and the cassette holder (A) A frame portion (B) for slidably holding the cassette and guiding it to a cassette loading position; and a driving means for moving the cassette holder (A) between a cassette insertion / removal position and a cassette loading position. 1)
In a cassette loading device in which the cassette (m) is inserted and withdrawn in a vertical position, the cassette (m) in a vertical position is placed on the lower slider side plate (2) of the pair of slider side plates (2, 2). A) a cassette spring (3B) for urging the lower side surface (m ₂ ) upward.