JPS61182660A - Cassette loading device - Google Patents

Abstract

PURPOSE:To enable a cassette to be loaded smoothly and reliably by providing a guide projection adapted to assure cassette positioning and prevention of mis-insertion on a cassette base of a cassette housing base having a front panel provided with a display part. CONSTITUTION:A video cassette is inserted into the cassette base 25. The cassette housing block 16 is made up of a rack bar 47 slidably holding the cassette base 25 by a vertically shifting guide groove and a front panel 5 capable of housing a display element accompanying electrical signals. A base plate is provided for guiding the housing base 16 shifted horizontally with the rack bar 47. Cassette retainers 74, 75 provided to the base plate are driven by the rack bar 47 to lower the cassette 4. A guide projection 86 is provided to inhibit mis-insertion of the cassette and to assure cassette positioning by fitting in a sensor hole 88 of the cassette 4. In this manner, the cassette can be smoothly and positively loaded to the cassette base to be shifted and loaded to a magnetic recording and reproducing device.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cassette loading device for loading and unloading a cassette tape used in a video cassette magnetic recording/reproducing device.

(Prior Art) In recent years, the so-called front loading system in which a cassette tape is loaded and unloaded from the front side of the video cassette magnetic recording and reproducing apparatus has become mainstream. Such a cassette mounting device will be explained with reference to FIG. 12. In the figure, a main body 1 of the magnetic recording/reproducing device is provided with a cassette loading port 2 for loading and unloading a cassette tape, and is rotatably pivoted to the main body 1, and is always supported by a spring (not shown). An open/close lid 3 biased to cover the cassette loading port 2 is attached. When installing the cassette 4, the cassette 4 is used to push open the opening/closing lid 3.

(Problems to be Solved by the Invention) However, with the above configuration, only a simple printed display or a display element that requires extremely simple electrical signal processing can be attached to the opening/closing lid. On the other hand, as video magnetic recording and reproducing devices become smaller and thinner, as well as pursue multi-functionality and convenient operation, the number of operation sections and display sections for functions and operations will inevitably increase. Layout is an important focus of main body design as it determines ease of use and appeal to users. However, in the so-called front loading format, the cassette loading port imposes restrictions on the effective area on the front of the device, and the display section that displays functions and operations that involve electrical signal processing occupies the limited area excluding the cassette loading port. There was a problem that it had to be placed in

SUMMARY OF THE INVENTION The present invention aims to solve the above-mentioned problem by providing a cassette mounting device that can effectively utilize the cassette mounting portion as a display section that involves electrical signal processing.

(Means for Solving the Problems) In order to solve the above problems, the cassette mounting device of the present invention includes a cassette stand for loading a video cassette, and a guide for moving the cassette stand up and down.

A cassette storage stand composed of a slidably held rack rod, a position fixing device for the rack rod, and a front panel capable of accommodating a display element involving electrical signal processing, and a cassette storage stand that moves horizontally together with the rack rod. A guide device, a cassette holding device for moving the cassette table up and down and holding the cassette, and a base mounted with a drive device for driving the rack rod, and a cassette sensor hole on the cassette table. A guide protrusion is provided that fits into the cassette to position the cassette and prevent erroneous insertion of the cassette.

(Function) With the above configuration, the cassette storage stand protrudes horizontally from the magnetic recording/reproducing device, making it possible to load or take out cassettes from above, and to use the front surface of the cassette storage stand as a display element that involves electrical signal processing. In addition to providing a magnetic recording and reproducing device that can be effectively used as a storage surface, by providing a guide protrusion on the cassette stand that fits into the sensor hole of the cassette, the position when the cassette is installed is regulated, and it is also possible to It is possible to prevent erroneous loading by making it possible to identify an error in loading a cassette by the floating of the cassette.

(Example) An example of the present invention will be described with reference to FIGS. 1 to 11.

FIG. 1 is a perspective view of a video cassette magnetic recording and reproducing apparatus equipped with a cassette mounting device according to the present invention.

A cassette loading device having a front panel 5 on which operation buttons and a display section are arranged is shown in a state in which a cassette 4 is loaded.

FIG. 2 is a perspective view showing the configuration of the cassette loading device according to the present invention.

Two right and left guide rails 6 and 7 and two chevron-shaped connecting rods 8 and 9 that fix these on the front and back constitute a base, and two left and right support stands 10 are fixed on the front connecting rod 8. Horizontal shaft guide rollers 12 and 13 are rotatably mounted on and 11, and two vertical shaft guide rollers 14 and 15 are rotatably mounted on the left guide rail 6, respectively.

The cassette storage stand 16 is configured in a frame shape with left and right side plates 17 and 18 and connecting plates 19 and 20 that fix these at the front and rear. Track rollers 21 and 22 that fit into the guide are rotatably mounted, and the left side plate 17 has a guide groove on the inner surface into which the horizontal guide roller 12 and two vertical guide rollers 14 and 15 fit. A rail 23 and a guide rail 24, into which the horizontal shaft guide roller 13 is fitted, are fixed to the inner surface of the right side plate 18, respectively.

The cassette storage stand 16 has a horizontal position with horizontal axis guide rollers 12 and 13 and track rollers 21 and 22.
The front and rear directions are regulated by vertical guide rollers 14 and 15, respectively, and it is slidably mounted on the base.

Note that it is of course possible to adopt other methods for guiding the cassette storage stand 16.

A front panel 5 is attached to the front surface of the cassette storage stand 16, on which operation buttons and a display section, which are the features of the present invention, are arranged.

The support wall 2 is provided with a vertical guide groove 27 on the inside of the front half of the left and right side plates 17 and 18, through which a total of four guide pins 26, which are implanted in two places in the front and back on both sides of the cassette stand 25, are inserted.
8 and 29 are each formed integrally.

2 installed in the support wall 28 between the left and right side plates 17 and 18 and the respective support walls 28 and 29.
Cam plates 32 and 33 are slidably mounted, each having a guide groove 31 that fits into the guide pin 30 of the book.

Each of the cam plates 32 and 33 has two horizontal cam surfaces 34 and an inclined cam surface 35 on the upper side, which are engaged with the guide pin 26 of the cassette stand 25, and a driving surface 35, which will be described later, on the rear end of the side surface. Guide grooves 40 and 41 are formed into which drive pins 38 and 39 implanted at the tips of arms 36 and 37 fit, respectively.

A cover 42 that covers the side plates 17 and 18 including the supporting walls 28 and 29 and the front connecting plate 19 of the cassette storage stand 16 that protrudes from the front of the magnetic recording/reproducing device in the cassette loading position is detachably attached to the cassette storage stand 16. is installed on. In FIG. 2, this is indicated by a two-dot chain line.

A rack rod 47 is slidably attached to the side plate 18 by guide grooves 45 and 46 that fit into two front and rear guide pins 43 and 44 implanted on the outside of the right side plate 18. The rack rod 47 has a protrusion 48 and a rack 50 on the upper side.
A rack 49 is formed on the entire lower side, and engagement pins 55 and 56 are implanted on the surface to engage with a bell crank portion 52 of a rotating arm 51 and an engagement notch 54 of a reversing arm 53, respectively, which will be described later. There is.

A gear board 57 of the speed reducer is mounted on the lower surface of the guide rail 7 of the base. A motor 59 to which an output gear 58 is attached is fixed to the gear board 57, and three two-stage gears 60, 61 and 62 that mesh with the output gear 58 are further provided.
The pinion of the last two-stage gear 62 and the rack rod 4
Drive gears 63 that mesh with both the racks 49 of No. 7 are rotatably mounted on fixed shafts implanted in the gear base plate 57, respectively. Through the action of this gear train, the rotation of the motor 59 is decelerated and transmitted to the drive gear 63, which is converted into sliding movement of the rack rod 47 by the rack 50.

A rotation shaft 64 fixed to the left and right drive arms 36 and 37 on which drive pins 38 and 39 that engage with the guide grooves 40 and 41 of the cam plates 32 and 33 described above is fixed is attached to the left and right side plates 17 and 18. It is rotatably mounted.

A sector gear 65 that meshes with the rack 50 formed on the protrusion 48 of the rack rod 47 is rotatably mounted on the right end of the rotation shaft 64, and this sector gear 65 and the drive arm 37
are connected by a tension coil spring 66. The rotation shaft 64 serves to synchronously drive the cam plates 32 and 33 provided on both the left and right sides.

The engaging pin 5 is embedded in the center of the surface of the rack rod 47.
a pivoting arm 5 having a bell crank portion 52 that engages with the rotating arm 5;
A support base 69 is fixed to the upper surface of the guide rails 6 and 7 of the base. and 70 so as to be rotatable. Both ends of a tension coil spring 71 are attached to support pins implanted in the tip of the bell crank portion 52 of the right rotation arm 51 and the support stand 70. Further, cassette holding arms 74 and 75 are rotatably attached to support shafts 72 and 73 which are implanted into the tips of the left and right turning arms 51 and 67 by press-fitting. The rotary arms 75 and the rotating arms 51 and 67 are held in substantially parallel positions by torsion coil springs 76 and 77 whose coil portions are inserted through the support shafts 72 and 73, respectively.

A chevron-shaped reversing arm 5 having the aforementioned engagement notch 54 that engages with an engagement pin 56 implanted in the rear end of the rack rod 47
3 is a support shaft 78 implanted in the rear end of the right side plate 18.
It is rotatably attached to. A tension coil spring 81 is attached to the pins 79 and 80 formed at the other end of the chevron-shaped reversing arm 53 and at the rear end of the side plate 18, respectively.
is attached using the hooks on both ends. Note that the reversing arm 53 and the engagement pin 56 may be a combination of a rack and a pinion.

The above-mentioned support stand 7 fixed to the guide seal 7 on the right side of the base
A locking arm 83 is rotatably attached to a support shaft 82 implanted in 0. In addition to the six or more locking plates 84 fixed to the upper surface of the connecting plate 20 on the rear side of the cassette storage table 16, the locking plate 84 engages with the locking arm 83 when the retracting operation is completed. The magnetic recording/reproducing device requires a cassette lid opening/closing device, a device for detecting the start and end positions of the horizontal retraction movement of the cassette storage stand 16, a detection switch for the completion of the downward movement of the cassette stand 25, and its actuator, etc. as components. However, since it is not related to the present invention, its explanation will be omitted.

The operation of the cassette loading device constructed as described above will be explained with reference to FIGS. 3 to 5.

FIG. 3 shows a state in which the cassette storage stand 16 of the cassette mounting device is pulled out from the magnetic recording/reproducing device.

When the cassette 4 is inserted into the cassette stand 25 and an operation button (not shown) is pressed, the rotation of the motor 59 is decelerated and the drive gear 6
3 and rotates clockwise, and the rack rod 47 having a rack 49 that engages therewith moves in the direction of arrow a.

The side plate 18 of the cassette storage stand 16 and the rack rod 47 are connected via a reversing arm 53, and a tension coil spring 81 connects the reversing arm 53 and the side plate 18.

Since it is attached to the upper side of the support shaft 78 at a distance of g, a force couple is generated in the direction of the arrow, and this couple is set to be sufficiently larger than the couple due to the sliding resistance of the cassette storage stand 16. As a result, the cassette storage table 16 moves in the direction of the arrow a together with the rack rod 47. Since relative sliding between the side plate 18 and the rack rod 47 does not occur, the rack rod 4
There is no change in the meshing position between the rack 50 on the upper side of 7 and the sector gear 65 mounted on the side plate 18 via the rotation shaft 64. Note that the rotating arm 51 with the cassette holding arm 74 attached to its tip is a tightly wound tension coil spring 71.
is held in a nearly horizontal position.

The guide pins 26 on both sides of the cassette stand 25 loaded with the cassette 4 are connected to the horizontal cam surfaces 32 and 33 of the cam plates 32 and 33.
is supported by Therefore, while the cassette storage stand 16 moves horizontally while the side plate 18 and the rack rod 47 maintain their relative positions, the cassette stand 25 will not be lowered even if pushed from above.

FIG. 4 shows the state at the moment when the retracting operation of the cassette storage stand 16 is completed, and shows the state in which the protrusion 48 of the rack rod 47 lifts the locking arm 83 attached to the support stand 70.

The locking arm 83 of the support stand 70 and the locking plate 84 of the rear connecting plate 20 of the cassette storage stand 16 are in a relative position in a locking relationship, so if the protrusion 48 moves, they enter into a locking relationship and the cassette storage is stopped. Make sure that the stand 16 does not return in the direction of arrow C.

Note that, of course, other methods such as a method using a solenoid can be used as the locking method.

FIG. 5 shows the state at the time when the cassette installation is completed. Even after the retraction of the cassette storage stand 16 shown in FIG. 4 is completed, the motor 59 continues to rotate, and the drive gear 63
continues retraction of the rack rod 47.

The rack rod 47 is guided by the guide pins 43 and 44 of the side plate 18 of the cassette storage stand 16, and slides relative to the side plate 18 in the direction of arrow d.

When the rack bar 47 slides in the direction of the arrow d with respect to the side plate 18, the sector gear 65 that meshes with the rack 5o on the upper side of the rack bar 47 rotates counterclockwise, and is connected to this by a tension coil spring 66. The drive arm 37 rotates, and the left drive arm 36 rotates counterclockwise in the same phase via the rotation shaft 64 to which it is fixed. Drive arms 36 and 37
As the cam rotates, the left and right cam plates 32 and 33 engage with each other through drive pins 38 and 39 at their tips.
moves horizontally in the direction of arrow e. Due to this horizontal movement, as the guide pin 26 supported by the horizontal cam surfaces 34 of the cam plates 32 and 33 moves along the inclined cam surface 35, the cassette table 25 on which the guide pin 26 is installed descends. In this case, the rising distance H1 of the inclined cam surface 35 is
The vertical movement distance of the cassette table 25 is made larger than H2.

On the other hand, after the rack rod 47 continues to slide for a while, the engagement pin 55 at the center of the rack rod 47 pushes the bell crank portion 52 of the rotation arm 51, so that the left and right rotation arms 67
and 51 rotate counterclockwise together with the rotation shaft 68,
Cassette pressing arms 74 and 75 attached to their ends press down the cassette 4.

In reality, the positional relationship between the engaging pin 55 of the rack rod 47 and the rotating arm 51 is such that the cassette holding arms 74 and 75 come into contact with the cassette 4 almost at the same time as the cam plates 32 and 33 complete their horizontal movement. Set. Also,
Since the moving length of the rack rod 47 is set to be slightly longer than the moving length of the cam plates 32 and 33, the cam plates 32 and 33
Even when the movement of the cassette table 25 is completed and the lowering operation of the cassette table 25 is completed, the rotation arms 51 and 67 are
6 and 77, the cassette can be held down by cassette holding arms 74 and 75. Note that the sector gear 65 and the drive arm 36
and are connected via the tension coil spring 66,
Even when the cam plates 32 and 33 complete their movement and stop, only the sector gear 65 rotates while the tension coil spring 66 is extended.

On the other hand, the engagement pin 56 on the rear end side of the rack rod 47 rotates the reversing arm 53 counterclockwise, so that the tension coil spring 81 is reversed to the lower side of the support shaft 78, and the couple is directed to the arrow f. It will work in the counterclockwise direction shown. Here, since the couple determined by the distance g2 between the line of action of the tension coil spring 81 and the support shaft 78 and the tensile force of the tension coil spring 81 is set appropriately, the sliding of the cassette storage stand 16 with respect to the side plate 18 It can be fixed in the completed position, thus keeping the cassette pressed down.

Incidentally, the protrusion 48 of the rack rod 47 has the role of releasing the locking arm 83 and the locking plate 84 when the cassette is taken out. That is, when taking out a cassette, the motor 59 rotates in the opposite direction, and the states shown in FIGS. 5 to 3 are reversed, and the reversing arm 53
4 rotates clockwise and is reversed to the state shown in FIG.

Next, the cassette stand 25 and cover 42 will be explained with reference to FIGS. 6 to 8. FIG. 6 is a perspective view of the cassette table 25 covered with a cover 42 and the cassette 4 loaded therein.6 In the cassette loading device of the present invention, unlike the conventional slot-in method, the cassette table 25 is magnetically The recording/reproducing device main body 1 (not shown) protrudes forward, and the cassette 4
will be charged from above.

The cassette stand 25 includes a crosspiece 85 for increasing rigidity, and a detection lamp (
A guide protrusion 86, which also serves to protect the cassette table 25 (not shown) when the cassette table 25 is lowered, is also formed with an aesthetic design. The groove 87 formed in the bottom shape of the cassette 4 and the sensor hole 88 fit into the above-mentioned crosspiece 85 and guide protrusion 86 when the cassette 4 is loaded.

The cover 42 has notches 89 and 90 formed on both sides, and sloped surfaces 91 and 92 that open outward to about half the depth on the inside of both sides, as shown in FIG. has been done. 7 and 8 show the cassette stand 25 and the cassette 4 covered by the cover 42, FIG. 7 shows the state in which the cassette 4 is taken out in the direction of arrow g, and FIG. The figure shows the state in which it is loaded into the container.

Next, the structure and operation of the guide rails 6 and 7 of the base and the guide rails 23 and 24 of the cassette storage table 16 will be explained with reference to FIGS. 9 to 11.

In FIG. 9, guide rails 6 and 7 constituting a base whose front and back are fixed by connecting rods 8 and 9 are symmetrical, and left and right side plates 17 and 18 of the cassette storage stand 16 are symmetrical.
It forms a guide track for track rollers 21 and 22 attached to the tips of the rollers.

Guide rails 23 and 24 are fixed inside the left and right side plates 17 and 18 of the cassette storage stand 16, respectively, and the left guide rail 23 is attached to the support stand 10 on the left side of the connecting rod 8 on the front side of the base. A track is formed in which the horizontal axis guide roller 12 and the two vertical axis guide rollers 14 and 15 attached to the left guide rail 6 of the base fit, respectively. A track is formed in which a horizontal shaft guide roller 13 fitted to a support 11 on the right side of the connecting rod 8 on the front side of the base is fitted. Due to the functions of these guide rails 6 and 7 and 23 and 24, the cassette storage table 16 moves on the base in a prescribed front-back direction while keeping it horizontal.

Track rollers 21 and 22 have the role of keeping the level level.
The distance L1 between the guide rollers 12 and 13 on the horizontal axis is the shortest when the cassette storage stand 16 is pulled out as shown in FIG. The distance L2 between the two becomes maximum when the retraction is completed. FIG. 11 shows a front sectional view of FIGS. 9 and 10. Guide rails 6 and 7 and guide rollers 12 and 1 are attached to the connecting rod 8 of the base.
Support stands 10 and 11 on which the rollers 3 are mounted are fixed, respectively, and a vertical shaft guide roller 14 is mounted on the left guide rail 6. Guide rails 23 and 24 and track rollers 21 and 22 are mounted on the left and right side plates 17 and 18 of the cassette storage stand 16, respectively.

1-Rack rollers 21 and 22 are the guide rails 6 of the base
and 7, and guide rollers 12 and 14 and 1
3 serve to guide guide rails 23 and 24 of the cassette storage stand 16, respectively.

(Effects of the Invention) According to the present invention, it becomes possible to insert or take out a cassette from above into a cassette storage stand protruding from a magnetic recording/reproducing device, and the front surface of the cassette storage stand is used as a display element that involves electrical signal processing. It can be used effectively as part of the storage surface, and at the same time, the cassette is always accurately and stably positioned when it is loaded, which not only stabilizes the recording and playback performance but also prevents incorrect loading of the cassette. It has an excellent preventive effect.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a magnetic recording/reproducing device according to an embodiment of the present invention, FIG. 2 is a perspective view showing the configuration of a cassette loading device according to the present invention, and FIGS. 3 to 5 are side configuration views showing its operation. , FIG. 6 is an enlarged perspective view of the cassette stand and cassette, FIGS. 7 and 8 are sectional views of the cover and cassette, and FIGS. 9 and 10 are partial perspective views of the base and the guide device for the cassette storage stand. . FIG. 11 is a sectional view thereof, and FIG. 12 is a perspective view of a magnetic recording/reproducing apparatus equipped with a conventional cassette mounting device. 1...Main body, 2...Charging port, 3...Opening/closing lid, 4...
...Cassette, 5...Front panel, 6.7.23
．． 24... Guide rail, 8, 9... Connecting rod, 10.
11.69.70...Support stand, 12.13.14.1
5...Guide roller, 16...Cassette storage stand, 17
．． 18... Side plate, 19.20... Connection plate, 21.2
2... Track roller, 25... Cassette stand, 26
, 30.43.44... Guide pin, 27.31.40
．． 41. '45, 46...Guide groove, 28.29.
... Support wall, 32.33... Cam plate, 34... Horizontal cam surface, 35... Inclined cam surface, 36° 37... Drive arm, 38.39... Drive pin, 42... ...Cover, 47...Rack rod, 48...Protrusion, 49.50
···rack. 51.67... Rotating arm, 52... Bell crank portion, 53... Reversing arm, 54... Engagement notch, 5
5.56... Engagement pin, 57... Gear board, 58...
...Output gear, 59...Motor, 60.61.62
...Two-stage gear, 63...Drive gear, 64°68...
・Rotation axis, 65... Sector gear, 66, 71.81...
・Tension coil spring, 72.73.78.82...Support shaft, 74.75...Cassette holding arm, 76, 77
... Torsion coil spring, 79.80 ... Pulling is pin, 83 ... Locking arm, 84 ... Locking plate, 85
... Crosspiece, 86 ... Guide device, 87 ... Groove, 88.
...Sensor hole, 89.90...Notch, 91°92
...Slope, a...Arrow indicating the moving direction of the cassette storage stand and rack rod, b, f...Arrow showing the couple direction of the reversing arm, C...Arrow indicating the moving direction of the cassette storage stand Arrow indicating, d...Arrow indicating the sliding direction of the rack rod, e...
・Arrow indicating the moving direction of the cam plate, g...Arrow indicating the cassette removal direction, e work lat...Distance between the support shaft 78 and the line of action of the tension coil spring 81. Patent applicant Matsushita Electric Industrial Co., Ltd. Figure 1-jc! ? ¥! 3 Blasphemous irises, etc. Fig. 6 88-・Sensu Ikko Fig. 7 Fig. 8 Fig. 89.90-All lost S Fig. 10 2 m-17-I70″″7 Yu--Death Delivery♂#Kanuchishi-noshi Figure 11 2324--ri C cut Hori J circle a〆! Circle circle diagram 12

Claims (1)

[Claims] From the front panel, which can accommodate a cassette stand for loading video cassettes, a guide for moving this cassette stand up and down, a slidably held rack rod, a device for fixing the position of this rack rod, and a display element with electrical signal processing. A cassette storage stand configured, a guide device that horizontally moves the cassette storage stand together with the rack rod, a cassette holding device that moves the cassette stand up and down to hold the cassette, and a drive device that drives the rack rod. and a base mounted on the cassette base, and on the cassette base,
A cassette mounting device characterized by being provided with a guide protrusion that fits into a sensor hole of the cassette to position the cassette and at the same time prevent incorrect insertion of the cassette.