JPH01264659A - Cassette tape mounting device - Google Patents

Abstract

PURPOSE:To execute a sure cassette insertion detection with a simple constitution by executing a movement in the cassette inserting direction of a cassette holder, detecting the movement to a normal position with a cassette insertion by means of a single detector, and controlling a driving motor by means of a swayable detecting lever. CONSTITUTION:A cassette 1, which is energized in a direction to push out the cassette 1, in which a guide groove 34 into which a pin 33 is fitted is provided, which is movable in the inserting direction of the cassette 1 to a cassette holder 2, simultaneously, in which a swayable lever 31 is provided, and which is inserted in being inclined to the holder 2, is straightened into a correct position by the lever 31. When the lever 31 is moved to a necessary position along with the cassette 1, it is detected by a photosensor 37 of a single detector, and the switch for starting up the motor to drive the holder 2 is turned on. By the simple constitution with only one detector, the cassette can be surely inserted, and the cassette can be mounted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cassette tape loading device, and particularly to a cassette tape loading device equipped with a cassette tape insertion detection means suitable for a cassette tape used in a high-performance magnetic recording and reproducing device. This invention relates to a tape mounting device for a cassette 1.

[Conventional technology]

Conventionally, the cassette tape insertion detection means of this type of magnetic recording/reproducing apparatus (VTR) has been designed to move between a first position where the tape can be inserted into the cassette 1 and a second position where the tape can be pulled out. A pair of left and right levers are provided to freely slide in the insertion direction with respect to the freely adjustable cassette holder, and
A configuration is known in which each of these pair of levers is provided with a detector.

Note that related means of this type include, for example,
As a method using two detection switches,
Publication No. 246053 is mentioned.

[Problem to be solved by the invention]

In the above conventional technology, a detector is installed on each of the left and right levers to detect insertion of the cassette tape, and there is no problem as long as the specified performance is satisfied, but when the cassette tape becomes large, No consideration was given to compatibility or simplification of the configuration.

In other words, when a cassette holder is provided with a pair of left and right levers that can be slid freely, it is necessary to move these levers in parallel with each other with high precision, but the cassette tape is used in a high-definition magnetic recording and reproducing device that is larger than the household size. When handling cassette tapes, the distance between the levers becomes wider, making it more difficult to secure the relative positions of the levers.

Furthermore, in the case where two detectors are provided corresponding to these levers, there is a problem that the configuration becomes complicated, such as requiring a position adjustment mechanism.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cassette tape mounting device that can accurately detect insertion of a cassette tape even with a single detector.

[Means to solve the problem]

The above object is to provide a detection lever that can come into contact with the front surface of a cassette tape, and a guide means that allows the detection lever to swing in the left and right directions with respect to the cassette holder and also to be movable in the direction of insertion of the cassette tape. This is achieved by providing an elastic means for constantly biasing the detection lever in the direction of pushing out the cassette tape, and one detector for detecting that the cassette tape is attached to a specified position in the cassette holder. Ru.

[Effect]

When a cassette tape is inserted into the cassette holder held at the first position, a detection lever that comes into contact with the cassette tape slides a predetermined amount.

In this state, one detector detects the insertion of the cassette tape, but even if the cassette tape is inserted at an angle to the insertion direction, the detection lever can swing freely in the left and right directions. Because of this structure, the cassette tape is swung and the insertion direction of the cassette tape is corrected to the correct insertion direction.

Therefore, the above-mentioned detector detects the insertion of the cassette tape, and this detection signal drives a motor, which is a drive source for operating the cassette holder, so that the cassette tape is correctly loaded.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view showing an embodiment of the cassette tape loading device of the present invention, FIG. 2 is a configuration diagram of the detection lever in FIG. 1, and FIG. 4 is an explanatory diagram of the operation showing the initial state when inserting the cassette tape, FIG. 4 is an explanatory diagram of the operation showing the state after inserting the cassette tape from the state of FIG. FIG. 6 is a perspective view showing another embodiment of the detection lever.

In addition, in FIGS. 2 to 5, (I2) shows a top view, and (b) shows a sectional view taken along the line AA in (a).

In FIG. 1, 1 is a cassette tape used in the high-definition magnetic recording/reproducing apparatus 100, 2 is a cassette holder for holding the cassette tape 1, and a groove (see FIG. A protrusion 4 is fixed thereto for guiding the cassette tape 1 in the insertion direction 3 by engaging with the cassette tape (not shown). Holes 5 are formed on both sides of the protrusion 4 for inserting a reel stand (not shown).

Furthermore, guides 7 are fixed to the inner sides of both sides 6 of the cassette holder 2, which is bent in the shape of an opening, for contacting the side surfaces 1B of the cassette 1 to the tape 1 and positioning the cassette 1 to the tape 1. . A bin 8 is installed on the outside of both sides 6 of the cassette holder 2, and this bin 8 is provided with a guide groove 10 formed in a guide plate 9.9 and consisting of a horizontal part and a vertical part.
By engaging with the cassette holder 2, the cassette holder 2 can be freely moved from a first position shown in the drawing to a second position (not shown) where the tape can be pulled out.

The drive mechanism 20 includes a motor 21. which is a drive source. Pulley 22
and 23. Belt 24. Shaft 25° Worm 26
．． Gear A27. Gear B28. It is composed of a gear C28, an arm 30, etc.

On the other hand, as shown in FIG. 2(a), a substantially T-shaped detection lever 31 is provided on the lower side of the cassette holder 2. Bendable pieces 32 that can come into contact with the cassette tape front section IA are provided on the front left and right sides of the detection lever 3]. Further, the detection lever 31 can freely slide in the insertion direction 3 of the cassette tape 1 by a kite bin 33 (guy 1 - means) fixed to the center of the cassette holder 2 and a guide groove 34 provided in the detection lever 31 itself. It is.

Further, the detection lever 31 is also swingable in the direction of arrow E or F in the figure, centering on the kite bin 33. In addition,
35. 35 is an elastic means, which biases the detection lever 31 in the direction 36 in which the cassette tape 1 is pushed out. The tensions of these left and right elastic means 35.degree. 35 are set to be approximately equal.

Furthermore, as shown in FIG. 2(b), a photosensor 37 (detector) is provided below the detection lever 3.

This 1-sensor 37 detects the insertion state of the cassette tape 1 by a detection piece 38 provided at the rear of the detection lever 3 entering so as to interrupt the optical path of the photosensor.

Note that the photosensor 37 is fixed to the center of the cassette holder 2 by a holder (not shown) or the like.

Next, the operation of this embodiment will be explained.

In FIG. 2, the detection lever 31 is pulled by the elastic means 35 in the direction 36 of pushing out the cassette 1 and the tape 1, but the bent pieces 32 provided on the front left and right sides (upper left and right in the figure) are connected to the cassette holder end 2'. The contact keeps them in the position shown. When the cassette tape 1 is pushed into the cassette holder 2 in the insertion direction 3 in this state, the ends of the front surface IA of the cassette tape 1 first come into contact with the left and right guides 7 and are positioned in the insertion direction, and the tape is further inserted. As a result, the cassette tape front section IA comes into contact with the bent piece 32 of the detection lever 31, as shown in FIG. When the cassette tape 1 is further pushed in the insertion direction from this state, the detection lever 31 moves in the B direction (insertion direction) in the figure against the tension of the elastic means 35. And the fourth
As shown in Figure (a), the guide groove 34 of the detection lever 31
When the rear end contacts the guide bin 33, a spring (not shown) provided on the cassette holder 2 presses the cassette tape 1, and the cassette tape J is held at this position.

In this state, as shown in FIG. 4(b), the sensor 37 detects the detection piece 38 of the detection lever 31, so the detection lever 31 detects the predetermined amount L (cassette tape 1 It is detected that the device has moved by the amount of movement when the device is inserted correctly.

Therefore, by inputting the detection signal 39 from the photosensor 37 to a system control/roll circuit (not shown), the system control circuit causes the arm 30 of the drive mechanism 2o shown in FIG. 1 to rotate clockwise. to motor 2
1, and the motor 21 supplies the drive signal to the pulley 22.
23. Bell l-24.

The arm 30 is rotated clockwise via the shaft 25, etc., and the cassette holder 2 holding the cassettes 1 to tape is moved to the first
The tape is moved from the first position to the second position where the tape can be pulled out.

By the way, in the operation of inserting the cassette tape work into the cassette holder 2 in this way, for example, as shown in FIG.
), when the cassette tape 1 is inserted at a predetermined angle θ with respect to the insertion direction 3, the front part IA of the cassette tape 1 and when the cassette tape 1 is inserted in the correct insertion direction. The distance between the front surface of the cassette tape and the virtual line 40 is shifted by a predetermined amount δ. Therefore, as shown in FIG. 5(b), the amount of movement of the detection piece 38 of the detection lever 31 is also smaller by δ than the amount of movement when the cassette 1 to tape 1 are inserted correctly, and the photo sensor 37 does not detect insertion of the cassette tape 1. However, in the present invention, the detection lever 31 is urged in the cassette tape pushing direction 36 by the left and right elastic means 35.

The guide pin 33 that engages with the guide groove 34 allows the cassette 1 to the tape 1 to be tilted with respect to the insertion direction because the cassette 1 to the tape 1 are tilted in the direction of the arrow E or F in the figure, thereby making it possible to maintain the inserted state. Even when it cannot be detected, the position can be corrected by manually swinging it to the position shown in FIG.

That is, since the photo sensor 37 is configured not to turn on unless the cassette tape 1 is inserted parallel to the insertion direction 3, reliable cassette tape insertion detection can be performed.

Next, another embodiment of the detection lever will be described using FIG. 6.

The detection lever 31 shown in FIG. 6 is a combination of the detection lever 31 described above divided into two parts, an R lever 41 and an L lever 43.
This is a mating relationship. In addition, the R lever 41 and the L lever
The lever 43 has a bending piece 32 and an elastic means 3, respectively.
5. Guide grooves 34 and 44 are formed. Note that the guide pin 33 is engaged with the guide grooves 34 and 44.

Further, the L lever 43 is provided with a detection piece 38 that can be detected by the photosensor 37 as in the above-described embodiment, and
A stopper 45 is provided on the lever 41. The stopper 45 is provided to prevent the relationship shown in the figure from being dislocated when the R lever 41 and the L lever 43 slide in the insertion direction 3.

Therefore, when the cassette tape 1 is inserted into the detection lever 31 configured as described above, the L lever 43 and the R lever 41 slide in the insertion direction with the relationship shown in the figure, and the cassette tape 1 is moved in the insertion direction 3. If the cassette tape 1 is inserted at an angle with respect to the guide pin 33, the cassette tape 1 can be swung around the guide pin 33. As a result, when the cassette tape 1 is inserted parallel to the insertion direction 3, the detection piece 38 enters the photosensor 37 and detects the normal insertion state of the cassette tape 1 in the same manner as described above.

〔Effect of the invention〕

As explained above, according to the present invention, as a cassette tape insertion detection means of a cassette tape loading device, a detection lever that contacts the cassette tape is provided so as to be slidable in the insertion direction and swingable in the left and right directions. Since the movement of the detection lever is configured to be detected by one detector, the insertion state can be detected by one detector by inserting the cassette tape parallel to the insertion direction. Even when the cassette tape is inserted at an angle, the detection lever and the cassette tape are swung together to correct the position, and the insertion is detected in the correct insertion state. Even with a simple configuration using one detector, the cassette tape can be reliably inserted. Tape insertion can be detected, and a cassette tape loading device with excellent functionality can be provided without the drawbacks of the prior art.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing one embodiment of the cassette tape loading device of the present invention, Fig. 2 is a configuration diagram of the detection lever in Fig. 1, and Fig. 3 is an initial state when the cassette tape is inserted into the cassette holder. FIG. 4 is an explanatory diagram showing the state in which the cassette tape has been inserted;
FIG. 5 is an explanatory view of the operation when the cassette tape is inserted at an angle, and FIG. 6 is a perspective view showing another embodiment of the detection lever. 1...cassette tape, 2...cassette holder. 21. Motor, 31. Detection lever, 32. Bent piece, 33. Guide pin (guide means), 34. Guide groove, 35. Elastic means, 37. E1 sensor (detector).
.

Claims (1)

[Scope of Claims] 1. A cassette tape that is movable between a first position where the cassette tape can be inserted and a second position where the tape stored in the cassette tape can be pulled out. A cassette tape mounting device comprising a cassette holder and a drive mechanism for moving the cassette holder to the first position and the second position, the detection lever being able to come into contact with the front surface of the cassette tape; A guide means for making the detection lever swingable in the left-right direction with respect to the cassette holder and also movable in the direction of inserting the cassette tape, and elasticity for constantly biasing the detection lever in the direction of pushing out the cassette tape. a detector for detecting that the cassette tape is inserted into the cassette holder;
By inserting a cassette tape into the cassette holder at the position, the detection lever slides in the insertion direction while rocking in the left-right direction, and when the detection lever is inserted to the specified position, the one detector 1. A cassette tape loading device that detects the insertion of a cassette tape by detecting the insertion of the cassette tape and drives a motor of the drive mechanism. 2. A cassette tape loading device, wherein one detector according to claim 1 is located in the center of the cassette holder. 3. A cassette tape loading device, wherein the detection lever according to claim 1 is constructed by combining two levers.