JPH02139752A - Cassette storing door device for magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To improve the simplicity of loading operation by electrically opening/ closing a door by an electric signal from a switch and closing a storage part also by manual operation. CONSTITUTION:Current is supplied to a motor by an electric cassette storing signal generated from a contactless switch 16 and a large gear 31 starts to rotate at a constant speed in the clockwise direction. Then, a suppression ring 33 formed unitedly with the large gear 31 is abutted upon a suppression part 22 formed unitedly with the slider 20, the slider 20 is moved in the rotational direction of the large gear in accordance with its movement and the door storing part 10 connected to the slider 20 is moved while interlocking with the slider 20 to start the closing operation of the door storing part 10. When the storing part 10 is manually closed, the slider 20 is depressed without restriction, the contact end 26c of a locking stopper 26 is released and relatively moved to a cam 32 and a clock pin 26b is locked by a locking notch 25. Thus, loading operation can be made easy.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cassette storage door having a cassette storage section, and more particularly to a tape recorder.

The present invention relates to a cassette storage door device for a magnetic recording/playback device that stores cassettes such as tape decks, video tape decks, etc. in a cassette storage section provided in a door.

[Conventional technology]

Magnetic recording and reproducing devices such as tape recorders and tape decks are equipped with a cassette storage section such as a kangaru pocket for loading cassette tapes, and this cassette storage section is used to load or remove the cassette nozzle. , constitutes a part of a cassette storage door device having a mechanism for opening and closing the door of the storage section.

The most common type of cassette storage door device is shown in FIG. 1. According to this, the cassette storage part l has a pocket la for storing cassettes, and a door 1b covering the front side of the pocket la. It is pivotally connected to the chassis directly or indirectly by a pin IC, and is always given a tendency to open in the opening direction by a tension spring 1d. This cassette storage part 1 is restrained from self-sustaining by a hook 2, and a locking part 2b provided at one end of the L-shaped hook 2, which is pivotally connected to the chassis with a pivot pin 2a, is connected to the cassette storage part 1. It captures the locking pin 1e that protrudes from.

The position of the hook 2 is regulated by a stopper 2d, and a tension spring 2C
This imparts a rotational habit in the locking direction, and by pressing the other end, the locking with respect to the locking pin le can be released.

At this time, if the opening/closing speed is fast, the cassette nof may bounce or even the cassette half may fly out.
In order to suppress the opening/closing speed of the cassette storage section, a brake device (not shown) consisting of a cylinder and a piston is connected to the cassette storage section l via a piston rod.

In such a cassette storage door device, first insert the cassette into the pocket la of the cassette storage section 1 from the direction of the arrow in the figure.
The closing operation of the door is completed by inserting it into the case and pressing the case/sort storage section 1 manually.

In the second conventional example shown in FIG. 2, the manual opening/closing operation can be performed automatically using a driving means 3 such as a plunger or a motor, and similar to the first conventional example, Insert the cassette into the slot 1a of the cassette storage compartment l, and control the drive means by manual operation or operation of the switch (not shown) provided on the panel surface, and the closing operation of the door is completed. It is made to be done.

[Problem to be solved by the invention]

Therefore, in the conventional cassette/soto storage door device shown in FIG. 1, the step of inserting the cassette into the cassette storage section,
Two actions are required, consisting of manually pressing the door compartment closed and loading the cassette into the device, which takes a long time to prepare for loading the cassette into the magnetic recording/playback device. Since the closing operation is manual, it requires a lot of force, is time-consuming, and lacks reliability, such as making the door lock unreliable.

Furthermore, the conventional cassette storage door device shown in FIG. 2 requires two simultaneous actions and has the disadvantage that it takes a long time to prepare for loading the cassette.

Therefore, this invention has the following advantages: A cassette storage device that allows the closing operation of the cassette storage section shown in the second conventional example to be reliably and easily loaded into a magnetic recording/playback device without wasting time and without manual operation. The object of the present invention is to provide a door device.

[Means to solve the problem]

For this purpose, the present invention provides a cassette storage door device equipped with a drive device that automatically opens and closes a rotatably supported cassette storage section, which comprises a drive source and a cassette storage door device driven by the drive source. The first thing to be done. a driven wheel having a second cam portion; a cassette storage portion that is normally biased in the open direction;
a transmission mechanism for rotating the cassette storage section by a cam section; a transmission mechanism for locking the cassette storage section in the closed position when the cassette storage section is in the closed position; and a transmission mechanism for rotating the cassette storage section by the second cam section; A locking mechanism that releases the closed state of the storage section and is always biased in the locking direction is provided, and the cassette storage section is automatically opened and closed by a drive source, and the cassette storage section is moved from the open position to the closed position. When the rotation is manually suppressed, the operation of the transmission mechanism and the locking mechanism is the same as the first one. The present invention is characterized in that the cassette storage section is configured to be able to rotate to the closed position without being blocked by the second cam section.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 3 to 7.

First, in Figures 3 and below, the symbol IO indicates a cassette/soto storage section, and this cassette storage section IO has a Kangaru-style pocket ll and a door 1 that covers the front of this pocket ll.
2, the middle part of an L-shaped arm 13 protruding from the bottom of the pocket 11 is pivotally connected to the chassis, so that the cassette storage part IO is supported, and a tension spring 14 latched to the free end of the arm 13 is biased in the opening direction.

Further, a non-contact type switch 1B for detecting the stored cassette TK is arranged inside the pocket ll of the cassette storage part 10, and this non-contact type switch 16 includes a light emitting diode lea as a light emitting part and a light receiving part. This is an optical switch consisting of a phototransistor 18b as a section.

The cassette storage section 10 has a tendency to move in the eject direction, but is restrained by being connected to a slider, which will be described later, via a connecting piece 15 or directly.

This cassette storage section 10 has a slider 20 attached to the chassis by a connecting piece 15 so as to be able to move linearly with respect to the chassis.
The slider 20 has a straight section 21 extending along the direction of movement and a restraining section 22 projecting in a direction perpendicular to the straight section z1. Guide holes 23 with a stroke of
4 is fitted to maintain the linearity of linear motion and the motion stroke.

Further, a locking notch 25 is formed at the lower edge of the straight portion 21, and a locking pin 28b is provided protruding from one end of the L-shaped locking stopper 2B which is pivotally attached to the chassis by a pivot pin 28a. can be fitted into the locking notch 25. This locking stopper 26 is connected to the locking pin 2 by a tension spring 27.
6b into the locking notch 25, and the other end is a contact end 2 that can come into contact with a cam to be described later.
It has become Bc.

A large gear 31 as a rotating member 30 is pivotally supported at a position close to the slider 20, and this large gear 31 has a control cam 32 of a locking stopper 2B concentrically, and has a semicircular locking cam 32 on its half circumference. It is a release holding surface 32a, and the remaining half circumference is a movement allowing surface with a diameter change so that the locking pin 28b of the locking stopper 26 can intrude into the locking notch 25 or escape from the locking notch 25. It is 32b.

Furthermore, an arc-shaped restraining ring 33 having a movement restraining function of the slider 20 is formed within the outer periphery of the motion permissive surface 32b of the control cam 32 on the side surface of the large gear 3I for one quarter of the circumference. This restraining ring 33 is located in a region of the movement permitting surface 32b of the control cam 32 that moves the locking stopper 2B in the unlocking direction, and its terminal end is located in an area that slightly overlaps with the locking release holding surface 32a. are doing.

This large gear 31 meshes with the final gear 84m of the reduction gear group 34, and the input gear 34b of the reduction gear group 34 meshes with the output gear 35a fixed to the output shaft of the motor 35, so that the rotational torque of the motor 35 increases. The signal is transmitted to the large gear 31.

The large gear 31 is formed with an operating protrusion 3B that controls the drive of the motor 35, and this operating protrusion 36 is connected to the motor 8.
The motor 35 can be stopped even when the control switch 37 of No. 5 is closed, and the motor 35 can be stopped every rotation of the large gear 31.

Next, the closing operation of the cassette storage section 10 in the cassette storage door device according to the present invention will be described. First, the closing operation is started from the open state of the cassette storage section IO shown in FIG.
K is inserted into the pocket 11 of the cassette storage section 10 in the direction of the arrow, and the cassette TK falls along the guide (not shown) of the pocket 11 under its own weight until it reaches a predetermined fall completion position (as shown in Figure 5). Before reaching state ), the optical axis emitted from the light emitting diode lea is blocked, and the cassette TK continues to fall, reaches a predetermined falling completion position, and is completely stored in the pocket 11.

When the phototransistor tab is switched, an electrical circuit 40 connected to a non-contact switch 6 as shown in FIG. generated.

Then, the motor is energized by the electric cassette storage signal issued from the non-contact switch I6, and the large gear 81 starts rotating at a constant speed clockwise. Subsequently, the restraining ring 33 formed integrally with the large gear 3I comes into contact with the suppressing portion 22 formed integrally with the slider 20, and the slider 20 is further moved in the direction of rotation of the large gear 3I as the large gear 3I rotates. ,
At the same time, the door storage section 10 connected to the slider 20 moves in conjunction with the slider 20, and the closing operation of the door storage section IO starts. As the rotation of the large gear 31 progresses, the locking stopper 2B starts rotating along the inclined surface of the control cam 32 formed integrally with the large gear 31, and the large gear 3L starts rotating from the initial state (FIG. 4). When the motor rotates 360 degrees (FIG. 3), the control switch 37 is switched by the booster 36 formed integrally with the large gear 31, and the motor 35 is stopped with this stop signal. The locking pin 26b is located in the locking notch 2 integrally formed in the slider 20.
5 and completes the door closing operation.

Furthermore, when the door storage section 1O is manually closed, the slider 20 is pushed in without being restricted, freeing the contact end 2Bc of the locking stopper 2B and moving it relative to the cam 32 to lock it. The notch 25 locks the locking pin 28b.

Next, the case where the opening operation is started from the cassette half-loaded state shown in FIG. 3 will be described. First, when the power to the motor 85 is turned on (by pressing an eject button (not shown)), the motor 85 starts rotating, and its rotational torque is transmitted to the large gear 31 via the reduction gear group 34.
This large gear 31 starts rotating.

The rotation of the large gear 31 causes the control cam 32. The restraint ring 33 also rotates, but the restraint ring 33 hits the restraint part 22 of the slider 20, and the control cam 32 does not come into contact with the contact end 2Be of the locking stopper 26, so it rotates against the self-sustaining behavior of the locking stopper 26. , try to rotate this.

However, since the eccentricity of the control cam 32 has not reached a sufficiently large point, the locking pin 28b is inserted into the locking notch 25.
Although it is not possible to escape from the locking notch 25, the locking stopper 2B is gradually rotated by the rotation of the control cam 32, and the locking stopper 2[1b is released from the locking notch 25. When the locking pin 26b escapes, the slider 20 moves in the eject direction due to the self-response of the cassette storage portion IO, but while the restraining ring 33 of the large gear 3■ is in contact with the restraining portion 22 of the slider 20, Movement of the slider 20 is suppressed.

Then, near the end of the motion allowing surface a2b of the control cam 32, the locking pin 26b of the locking stopper 26 is inserted into the locking notch 2.
When the slider 2o is removed from the cassette storage section 1, the slider 2o
It moves and ejects according to G's ejection habit.

A locking stopper 2 is attached to the locking release holding surface 32a of the control cam 32.
While the contact end 28c of B is in contact, the locking pin 28b
maintains a position away from the slider 20.

When the large gear rotates once, the operating protrusion 3B switches the control switch 37 to stop the rotation of the motor 35, and the large gear 8
The rotation of 1 is stopped.

This eject movement is stopped when the guide bin 24 comes into contact with the end of the guide hole 23 formed in the slider 20, and the driving force for the eject movement is caused by the spring applied to the cassette storage portion IO. Even if an obstacle exists in the eject movement area and obstructs the movement, the motor 35 will not be overloaded and will not be affected.

In the above embodiment, a rechargeable switch was used as the non-contact switch, but other switches such as a switch that detects changes in capacitance or a switch that uses a Hall element to detect changes in magnetic flux may also be used. can.

Also, as a drive device, the slider 2o and the rotating member 30
Although the power of the motor 35 has been explained using a plunger, a plunger or the like may also be used, and any means that drives the cassette storage section by an electric signal may be used.

〔Effect of the invention〕

As is clear from the above description, the cassette storage door device of the present invention includes a non-contact switch arranged to detect storage of a cassette, and uses an electrical signal from the switch to electrically operate the door. In addition to being constructed with a drive device that can be opened and closed manually, the storage compartment can also be closed manually, so when loading a cassette into a tape recorder, etc., the only thing you need to do is align the cassette with the insertion slot at the top of the cassette storage compartment, and then manually close the storage compartment. Because it is automatically attached just by releasing it,
There is no need to manually drop in the cassette or manually push in the door, and if the cassette compartment is manually pushed in, the cassette can be loaded as is, saving time for loading. It is possible to shorten the time, improve the ease of operation, and improve the reliability of the loading operation.

[Brief explanation of the drawing]

1 and 2 are schematic side views of a conventionally known cassette storage door device, FIGS. 3 to 7 show an embodiment of the cassette storage door device according to the present invention, and FIG. A side view when the switch is closed, and FIG. 7 is a circuit diagram of the detection section of the photoelectric switch. IO...Cassette storage section, 11...Pocket, 12
...Door, ■3...Arm, 14...Tension spring,
15... Connection piece, 1B... Non-contact switch, le
a... Light emitting diode, 16b... Phototransistor, 20... Slider, 21... Straight line part, 22... Suppressing part, 23... Guide hole, 24... Guide pin, 2
5... Locking notch, 26... Locking stopper, 28a.
... Pivotal pin, 2Eib... Locking pin, 28c... Contact end, 30... Rotating member, 31... Large gear, 32... Control cam, 32a... Lock release holding surface , 32b...Motion permitting surface, 33...Suppression ring, 34...Reduction gear group, 34a...Final gear, 34b...Input gear, 3
B...Motor, 35a...Output gear, 3B...Operation protrusion, 37...Control switch.

Claims (1)

[Scope of Claim] A cassette storage door device comprising a drive device that automatically opens and closes a rotatably supported cassette storage section, the door device comprising: a drive source; and a door driven by the drive source. 1. A driven wheel having a second cam part, a cassette storage part that is normally biased in the opening direction, a transmission mechanism for rotating the cassette storage part by the first cam part, and the above-mentioned a locking mechanism that locks the cassette storage section in the closed position when the cassette storage section is in the closed position, releases the closed state of the cassette storage section by the second cam section, and is always biased in the locking direction; When the cassette storage section is manually pressed and rotated from the open position to the closed position, the operation of the transmission mechanism and the locking mechanism is as described above. A cassette storage door device for a magnetic recording and reproducing device, characterized in that the cassette storage door device is configured such that the cassette storage portion can be rotated to a closed position without being blocked by the first and second cam portions.