JPH04302844A - Cassette player - Google Patents

Abstract

PURPOSE:To surely perform a loading operation of a tape cassette into a cassette driving mechanism with a compact cam mechanism by moving and engaging 1st and 2nd cam pins along with 1st and 2nd cam grooves by rotating a rotary cam. CONSTITUTION:A cassette holder 17 is moved back and forth by a moving can mechanism 31. The movement of a slide chassis 11 between its most forward end position and intermediate position is performed by engaging the 1st can pin 34 of a cam gear 32 with the 1st cam groove 41 of a fixed cam 40, and the movement of the slide chassis 11 between the intermediate position and its most backward end position is performed by engaging the 2nd cam pin 35 with the 2nd can groove 42. Thus, the moving cam mechanism 31 is constituted in a small space, and the loading operation of the tape cassette into the cassette driving mechanism can surely be carried out.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette player, and more particularly to a cassette player equipped with a so-called changer function capable of continuously playing or recording a plurality of tape cassettes.

0002

2. Description of the Related Art As a cassette player for playing back (or recording) tape cassettes, a cassette player with a so-called changer function that can play back (or record) a plurality of tape cassettes in succession has been considered.

The mechanism currently being considered for this cassette player consists of a cassette drive mechanism (mechanical deck) for playing back or recording tape cassettes, and a plurality of tape cassettes housed around this cassette drive mechanism, each tape being It is composed of a drum-shaped cassette holder that rotates so that the cassettes are matched with the cassette drive mechanism, and a movement mechanism that moves the cassette holder in a straight line.By rotating the cassette holder, multiple tape cassettes can be By selecting an arbitrary tape cassette from among them, making it compatible with the cassette drive mechanism, and then moving the cassette holder in a straight line by the moving mechanism,
The selected tape cassette is loaded into the cassette drive mechanism and operated to play or record the tape cassette.

0004

[Problems to be Solved by the Invention] In such a configuration, a cam mechanism is preferably used as a moving mechanism to move the cassette holder in a straight line. In order to ensure this, a cam with a large diameter must be used,
Therefore, a large space is required to arrange the cam mechanism.

[0005] The present invention has been made in view of the above points.
To provide a cam mechanism capable of performing a suitable moving operation without requiring a large installation space in a cassette player in which a tape cassette is mounted on a cassette drive mechanism by linearly moving a cassette holder.

[0006]

[Means for Solving the Problems] In order to achieve the above-mentioned objects, the present invention provides a cassette drive mechanism fixed on a base chassis for playing back or recording a tape cassette;
The slide chassis is supported to be movable linearly with respect to the base chassis, and the cassette holder is supported on the slide chassis and stores and holds a tape cassette. In a cassette player in which a tape cassette in a holder is attached to a cassette drive mechanism, a rotary cam (cam gear) having first and second cam pins is pivotally mounted on either one side of a base chassis or a slide chassis, and 1st and 2nd on the other side
A cam groove is provided, and the first and second cam pins are moved and engaged across the first and second cam grooves by rotation of the rotating cam, so that the slide chassis is moved relative to the base chassis. It is something.

[0007]

[Operation] In the cassette player of the present invention constructed as described above, the first and second cam pins are moved and engaged across the first and second cam grooves by the rotation of the rotary cam, so that the cassette holder is fixed. The moving operation is performed satisfactorily, and therefore the mounting operation of the tape cassette to the cassette drive mechanism is performed reliably. By adopting this structure in which the first and second cam pins are engaged across the first and second cam grooves by the rotation of the rotating cam, the diameter of the rotating cam can be made small. Therefore, the cam mechanism can be configured compactly.

[0008]

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

In the figure, 1 indicates a cassette player (cassette recording/reproducing device) as a whole, 2 is a base chassis, and 3 is a front panel attached to the front side of the base chassis 2. As shown in FIG. An opening 4 is formed in the center of the front panel 3, and a front lid 5 is erected on the base chassis 2 at a shaft portion 6 projecting left and right at the lower end of the front lid 5 to open and close the opening 4. It is pivotally supported by a bearing piece 7 so as to be rotatable in the front-back direction. The front cover 5 is made of transparent resin so that the inside of the apparatus can be seen through, and the front cover 5 is always biased rearward, that is, in the closing direction, by a predetermined spring means (not shown).

[0010] A base chassis 2 is located opposite the front cover 5.
A cassette drive mechanism (mechanical deck) 8 is arranged and fixed at the center of the front part. This cassette drive mechanism 8 includes a reel drive shaft 9, a capstan 10, and a magnetic head (not shown), similar to that of a general cassette player.
A pinch roller and the like are provided, and when the tape cassette is attached to the cassette drive mechanism 8, the reel drive shaft 9 and capstan 10 are driven to rotate, and the magnetic head and pinch roller are inserted from the opening of the tape cassette. The playback (or recording) operation is thereby performed.

Further, a slide chassis 11 is supported on the base chassis 2 so as to be slidable in the front and rear directions. That is, a pair of support rails 12 which are long in the front and rear directions are fixed to the base chassis 2 on the left and right sides. A slide chassis 11 is placed on top. Guide members 13 are attached to the front and rear of the left and right ends of the slide chassis 11, respectively, and as the guide members 13 are guided along the left and right guide rails 14 provided on the base chassis 2 side, the slide chassis 11 is configured so that it can be moved linearly in the front-rear direction while its lateral movement is restricted. Furthermore, an opening 15 is formed in the center of the front part of the slide chassis 11 to escape the cassette drive mechanism 8, so that the slide chassis 11 can be smoothly slid in the front and back direction without interfering with the cassette drive mechanism 8. It has become.

A support shaft 16 is vertically provided in the center of the slide chassis 11, and a cassette holder 17 is rotatably supported on the support shaft 16. The cassette holder 17 has a drum shape with a ceiling, and is rotatably fitted and supported by a support shaft 16 in a tubular bearing part 18 formed in the center thereof. Can store book tape cassette C. That is, in this example, five pocket-shaped cassette storage sections 19 are provided in the circumferential direction, and these cassette storage sections 19
The tape cassettes C are housed and held in an upright position, respectively.

This drum-shaped cassette holder 17 is
Since it is unstable to support the slide chassis 11 only at the center, a structure is adopted in which part of the outer periphery is supported at required locations to prevent lifting. That is, ribs 20 are formed on the outer peripheral surface of the cassette holder 17 over the entire circumference, and correspondingly, ribs 20 are formed at two locations on the left and right of the front end of the slide chassis 11 facing the cassette drive mechanism 8. A guide mechanism 21 is provided that guides the device by sandwiching it from above and below. As shown in FIG. 10, this guide mechanism 21 consists of a pedestal member 22 that is erected and fixed to the slide chassis 11, and a disk roller 24 that is rotatably attached to the upper surface of this pedestal member 22 via a shaft 23. This pedestal member 22 and the disc roller 2
By sandwiching and guiding the protrusion 20 between the cassette holder 17 and the cassette holder 4, the cassette holder 17 can be rotated in a stable state without the outer periphery lifting up.

A rotation drive mechanism 25 for rotating the cassette holder 17 is constructed on the slide chassis 11. That is, a drive motor 26 is fixed at a predetermined position on the slide chassis 11, and the rotation of the drive motor 26 is transmitted to reduction gears 28 and 29 via a transmission belt 27. These reduction gears 28 and 29 are both pivotally supported by the slide chassis 11, and the reduction gear 29 meshes with a gear portion 30 formed on the outer peripheral surface of the cassette holder 17 over the entire circumference. Therefore, when the drive motor 26 is rotated, its rotational force is transmitted to the cassette holder 17 via the transmission belt 27 and the reduction gears 28 and 29, so that the cassette holder 17 can handle the tape cassettes stored in each cassette storage section 19. C
are sequentially rotated to correspond to the cassette drive mechanism 8.

Furthermore, a moving cam mechanism 31 is constructed between the base chassis 2 and the slide chassis 11 for linearly moving the cassette holder 17 and for moving the tape cassette C in the direction of attachment and detachment with respect to the cassette drive mechanism 8. has been done. As mentioned above, the cassette holder 17
is supported on a slide chassis 11 that is slidably supported in the front and rear directions with respect to the base chassis 2. Therefore, this slide chassis 11 is moved by the moving cam mechanism 31.
By moving the cassette holder 17 back and forth, the cassette holder 17 is moved linearly as a whole. This moving mechanism 31 is constructed as follows.

First, on the lower surface side of the slide chassis 11, a disk-shaped cam gear 32 serving as a rotary cam is rotatably mounted at its center via a pivot shaft 33. The cam gear 32 has a first cam pin 34 and a second cam pin 35 that is disposed 180 degrees opposite to the first cam pin 34 with the pivot 33 in between. The second cam pin 35 is provided at a position near the center of rotation. Reference numeral 36 denotes a drive motor for rotationally driving the cam gear 32; that is, the rotation of the drive motor 36 is transmitted to the cam gear 32 at a reduced speed via a transmission belt 37 and reduction gears 38, 39.

On the other hand, a fixed cam 40 is fixed to the base chassis 2 side corresponding to the cam gear 32, and a first cam groove 41 and a second cam groove 42 are formed in the front and rear of the fixed cam 40. ing. Both the first cam groove 41 and the second cam groove 42 are formed substantially linearly with a predetermined length in a direction perpendicular to the moving direction of the slide chassis 11. The distance between the first cam pin 34 and the second cam groove 42 is approximately equal to the distance between the first cam pin 34 and the second cam pin 35 of the cam gear 32. As will be described later, the first and second cam grooves 41 of this fixed cam 40
, 42 are the first and second cam pins 34 of the cam gear 32, respectively.
, 35 are movably engaged with each other so that the slide chassis 11 is moved in the front-rear direction with respect to the base chassis 2.

Furthermore, in this moving cam mechanism 31,
A limiter mechanism 43 is provided that operates when the slide chassis 11 is moved to the rearmost position. That is, in this example, an L-shaped limiter arm 44 is connected to the base chassis 2 via a pivot shaft 45 near the fixed cam 40.
One end 44a of this limiter arm 44 is located within a wide groove 46 formed in the fixed cam 40, and the one end 44a of this limiter arm 44 and the groove 46 The groove space formed between the rear side surface and the second cam groove 42 is the second cam groove 42 .

The other end 44b of this limiter arm 44
and a locking piece 47 protruding from a predetermined position of the base chassis 2.
A limiter spring 48 is stretched between the limiter spring 48 and the limiter arm 44 is always biased so that the limiter arm 44 is rotated counterclockwise in the figure, that is, one end portion 44a is rotated rearward. However, in a normal state, the edge of the other end 44b of the limiter arm 44 is brought into contact with a stopper piece 49 erected on the base chassis 2 by the force of the limiter spring 48, so that the second cam groove 42 maintains a predetermined groove width. As will be described later, when the slide chassis 11 is moved to the rearmost position, the second cam pin 35 of the cam gear 32
is configured to press this limiter arm 44 against the force of a limiter spring 48 so as to act as a limiter.

Next, the operation of the apparatus of this embodiment constructed as above will be explained. Figures 1 and 4 show the slide chassis 1.
1, that is, the cassette holder 17 is at the forwardmost movement position (first
position). In this position, only the first cam pin 34 of the cam gear 32 of the movable cam mechanism 31 is engaged with the first cam groove 41 of the fixed cam 40 (see FIG. 7).

When the slide chassis 11 is in the frontmost position as described above, the protrusions 51 protruding from the left and right sides of the cover member 50 attached to the front end of the slide chassis 11 are attached to the left and right sides of the front cover 5. Press from inside,
As a result, the front cover 5 is kept open against the biasing force in the closing direction. A portion of the cassette holder 17 is exposed to the outside of the apparatus through the opening 4, so that the tape cassette C can be taken in and out of the cassette storage section 19. At this position, the cassette holder 17 is rotatable, and by sequentially rotating the cassette holder 17 by the drive motor 26 of the rotation drive mechanism 25, tape cassettes can be replaced one after another.

From this state, when the drive motor 36 of the movable cam mechanism 31 is driven and the cam gear 32 is rotated counterclockwise in the figure, the first cam pin 34 engages with the first cam groove 41 of the fixed cam 40. Due to this, the cam gear 32 is moved rearward relative to the fixed cam 40, and therefore the slide chassis 11, that is, the cassette holder 17 is moved backward.

FIGS. 2 and 5 show a state in which the slide chassis 11, that is, the cassette holder 17 has been retreated from the position shown in FIGS. 1 and 4 and is in an intermediate movement position (second position). In this position, the moving mechanism 31 has the first and second cam pins 34 and 35 of the cam gear 32 engaged with the first and second cam grooves 41 and 42 of the fixed cam 40, respectively (see FIG. 8). A straight line connecting the first cam pin 34 and the second cam pin 35 of the cam gear 32 is the slide chassis 1.
1, that is, the cam gear 32 is at the dead center, so even if some force is applied to the slide chassis 11, the cam gear 32 will not rotate unexpectedly, and therefore the slide chassis 11 will be securely fixed. That is, the position of the cassette holder 17 will not shift.

When the slide chassis 11 is retracted to the intermediate position in this way, the pressure on the front cover 5 by the slide chassis 11 is released, so the front cover 5 is closed, and therefore the cassette holder 17 is not placed inside the apparatus. It is in a fully contained condition. Even in this position, the cassette holder 17 is rotatable, and by rotating the cassette holder 17 by the drive motor 26 of the rotary drive mechanism 25, a tape cassette for reproduction (or recording) is selected.

When the selected tape cassette C is placed in front of the cassette drive mechanism 8, the moving cam mechanism 3
The cam gear 32 is further rotated counterclockwise in the figure by the drive of the first drive motor 36, and as a result, the first cam pin 34 of the cam gear 32 is pulled out of the first cam groove 41 of the fixed cam 40. Since the second cam pin 35 is engaged with the second cam groove 42, the cam gear 32 is relatively moved rearward with respect to the fixed cam 40, and therefore the slide chassis 11, that is, the cassette holder 17 is further moved backward. become.

FIGS. 3 and 6 show a state in which the slide chassis 11, that is, the cassette holder 17 has been further retreated from the position shown in FIGS. 2 and 5 and is at the rearmost moving position (third position). At this position, the selected tape cassette C
is attached to the cassette drive mechanism 8, and the cassette holder 1
7 is in a state where it cannot rotate. That is, from the state in which the tape cassette selected in FIGS. 2 and 6 is placed in front of the cassette drive mechanism 8,
When the tape cassette is moved backward, the tape cassette also moves together with the tape cassette and is attached to the cassette drive mechanism 8.

In addition, in the operation of mounting this tape cassette to the cassette drive mechanism 8, since the outer circumferential portion of the cassette holder 8 is guided by the guide mechanism 21 as described above, the tape cassette C can be smoothly attached to the cassette drive mechanism. It is installed on 8. That is, the cassette holder 17
is prevented from floating up by the left and right guide mechanisms 21, so the tape cassette C stored in the cassette holder 17 always corresponds to the correct height relative to the cassette drive mechanism 8.
It can be installed reliably without getting caught or the like.

Further, when the slide chassis 11 is at the rearmost position as described above, the limiter mechanism 43 in the moving cam mechanism 31 is in operation. That is, as is clear from FIG. 9, the second cam pin 35 of the cam gear 32 pushes the limiter arm 44 forward against the force of the limiter spring 48, so that the force of the limiter spring 48 pushes the limiter arm 44 and the cam gear 32. is transmitted to the slide chassis 11 through the slide chassis 1.
1, that is, the cassette holder 17 is in a state where a backward biasing force is applied. Therefore, the tape cassette is pressed against the cassette drive mechanism 8 by the cassette holder 17, so that the tape cassette is stably attached to the cassette drive mechanism 8 without wobbling or the like, ensuring reliable playback. or recording) action is performed.

As described above, in the apparatus of this embodiment, one tape cassette can be selected from among the five tape cassettes housed in the cassette holder 17 for reproduction (or recording). After the reproduction (or recording) of this tape cassette is completed, the cam gear 32 of the moving cam mechanism 31 is rotated in the opposite direction, that is, clockwise, to return the cassette holder 17 to the intermediate position shown in FIGS. 2 and 5. As a result, the tape cassette is detached from the cassette drive mechanism 8, and the cassette holder 17 is thus made rotatable so that the next tape cassette can be selected. In this manner, the apparatus of this embodiment can continuously reproduce (or record) five tape cassettes without having to take them in or out halfway.

As described above, the apparatus of this embodiment has a rotatable drum-shaped cassette holder 17 that can accommodate five tape cassettes C, and by moving this cassette holder 17 back and forth by the moving cam mechanism 31, one tape cassette C can be stored. Continuous playback of five tape cassettes (
This is a cassette player with a changer function that enables recording and recording.

Furthermore, in the apparatus of this embodiment, guide mechanisms 21 for guiding the outer circumference of the cassette holder 17 are provided at two locations facing the cassette drive mechanism 8 to prevent the cassette holder 17 from lifting up. The operation of mounting the cassette to the cassette drive mechanism 8 is performed smoothly and reliably.

Furthermore, in this embodiment, a special mechanism different from a general cam mechanism is adopted as the moving cam mechanism 31 for moving the cassette holder 17 back and forth, so that the moving cam mechanism 31 can be made more compact. It is being That is, the movable cam mechanism 31 of this example device has a structure in which the slide chassis 11 is moved back and forth with respect to the base chassis 2 by the rotation of the cam gear 32, which is moved relative to the fixed cam 40. Movement of the slide chassis 11 between the frontmost position and the intermediate position is performed by the first cam pin 34 of the cam gear 32 and the fixed cam 40.
Movement of the slide chassis 11 between the intermediate position and the rearmost position is performed by the engagement of the second cam pin 35 and the second cam groove 42. In other words, the rotation of the cam gear 32 causes the first and second cam pins 34 and 35 to move into the first and second cam grooves 41 and 4.
2, the slide chassis 11 is moved relative to the base chassis 2 by being engaged with the base chassis 2, so the diameter of the cam gear 32 is made smaller than the diameter of the cam of a general cam mechanism during movement of a certain stroke. Therefore, the moving cam mechanism 31 can be constructed in a smaller space by reducing the diameter of the cam gear 32.

Furthermore, in this embodiment, the moving cam mechanism 31 for moving the cassette holder 17 back and forth is provided with a limiter mechanism 43 to press the tape cassette C onto the cassette drive mechanism 8. There is no need to provide a limiter mechanism for pressing the tape cassette to the cassette drive mechanism 8 in each cassette storage section 19, and therefore the structure of the cassette holder 17 can be simplified.

[0034] As described above, the device of this example has unique structures throughout, and realizes a high-performance cassette player with a changer function that is simple in structure, operates reliably, and operates reliably.

Although one embodiment of the present invention has been described above, it goes without saying that the present invention is not limited to the configuration of this embodiment and can take various embodiments.

[0036]

As described above, the present invention comprises: a cassette drive mechanism fixed on a base chassis for playing back or recording a tape cassette; a slide chassis supported linearly movably with respect to the base chassis; A cassette player is provided with a cassette holder supported on a slide chassis to house and hold a tape cassette, and the tape cassette in the cassette holder is attached to a cassette drive mechanism by moving the slide chassis in a straight line relative to a base chassis. , a rotary cam having first and second cam pins is pivotally mounted on one side of the base chassis and the slide chassis, and first and second cam grooves are provided on the other side, and rotation of the rotary cam causes the first
By having a structure in which the slide chassis is moved relative to the base chassis by the second cam pin being movably engaged across the first and second cam grooves, the movement of the cassette holder, that is, the cassette of the tape cassette The mounting operation to the drive mechanism is performed reliably, and the diameter of the rotary cam can be made smaller than conventional cams, so the arrangement of the moving cam mechanism does not require a large space.
As a result, there is an advantage that the internal space of the cassette player can be used effectively.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway plan view of the embodiment, showing a state in which the cassette holder is at the forwardmost moving position (first position).

FIG. 2 is a partially cutaway plan view of the embodiment, showing a state in which the cassette holder is in an intermediate movement position (second position).

FIG. 3 is a partially cutaway plan view of the embodiment, showing a state in which the cassette holder is at the rearmost moving position (third position).

FIG. 4 is a longitudinal side view of the embodiment, showing a state in which the cassette holder is at the forwardmost moving position (first position).

FIG. 5 is a longitudinal side view of the embodiment, showing a state in which the cassette holder is in an intermediate movement position (second position).

FIG. 6 is a longitudinal side view of the embodiment, showing a state in which the cassette holder is at the rearmost moving position (third position).

FIG. 7 is an explanatory diagram of the operation of the moving cam mechanism, and corresponds to FIG. 1.

8 is an explanatory diagram of the operation of the moving cam mechanism, and corresponds to FIG. 2. FIG.

9 is an explanatory diagram of the operation of the moving cam mechanism, and corresponds to FIG. 3. FIG.

FIG. 10 is a side view of a guide mechanism that guides the outer circumference of the cassette holder.

[Explanation of symbols]

C Tape cassette 2 Base chassis 8 Cassette drive mechanism 11 Slide chassis 17 Cassette holder 31　Moving cam mechanism 32 Cam gear (rotating cam) 34 First cam pin 35 Second cam pin 41 First cam groove 42 Second cam groove

Claims (1)

[Claims] 1. A cassette drive mechanism fixed on a base chassis for playing or recording a tape cassette, a slide chassis supported linearly movably with respect to the base chassis, and a slide chassis supported on the slide chassis. and a cassette holder for storing and holding a tape cassette, and the tape cassette in the cassette holder is mounted on the cassette drive mechanism by moving the slide chassis linearly with respect to the base chassis. the first one on either side of the base chassis or the slide chassis
, a rotary cam having a second cam pin is pivotally mounted, and
First and second cam grooves are provided on the other side, and rotation of the rotating cam causes the first and second cam pins to move into the first and second cam grooves.
A cassette player characterized in that the slide chassis is moved relative to the base chassis by being movably engaged across the cam grooves of the cassette player.