JPH0562313A - Cassette loading device - Google Patents

Abstract

PURPOSE:To provide a thin cassette loading device at a low cost usable for two kinds of cassettes while maintaining a superior operability of a front loading system exclusively used for a standard cassette by performing an insertion of cassette and a detection of size without any exclusive switch by the utilization of an optical detecting means for tape ending/starting parts, in the cassette loading device of a magnetic recording/reproducing device capable of recording/ reproducing the standard cassette and miniature cassette without using an adapter. CONSTITUTION:The device is constituted in such a manner that the cassette size is detected by a detection lever 42 stopping up an optical path hole 44 with a light shielding part 43 when the standard cassette is inserted to a cassette holder 1 and that a thrust is detected by stopping up the optical path hole 44 with a follower rack 16 when the cassette holder 1 is thrusted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is effective when used in a magnetic recording / reproducing apparatus constructed so that a standard tape cassette and a small tape cassette smaller than that can be recorded / reproduced without using an adapter. The present invention relates to a cassette mounting device.

[0002]

2. Description of the Related Art In recent years, the demand for a VTR with a built-in camera has increased, and a compact and lightweight product is desired.
Most of them use cassettes, for example C
-When reproducing a VHS cassette recorded by a magnetic recording / reproducing apparatus for using the VHS cassette, the applicant has already used the cassette adapter proposed in JP-A-56-202198, Further, a magnetic recording / reproducing apparatus capable of recording / reproducing without an adapter has been used as proposed in JP-A-2-132670. In addition, 2 by the tray system such as a CD player
Devices that can use various types of cassettes have been commercialized.

[0003]

However, when a cassette adapter is used, the C-VHS cassette must be mounted on the cassette adapter and then the cassette adapter must be mounted on a device dedicated to the VHS cassette. It was complicated. Further, the proposed magnetic recording / reproducing apparatus has a dedicated cassette holding mechanism corresponding to two types of cassettes, and therefore the cassette mounting mechanism is complicated and therefore expensive. Furthermore, the tray-type magnetic recording / reproducing apparatus is inferior in operability to the conventional VHS cassette dedicated apparatus, which is a front loading type cassette mounting apparatus.

[0004]

In order to solve the above problems, a cassette loading apparatus of the present invention is a cassette holding means for holding a standard type tape cassette and a small tape cassette inserted in the apparatus, and a cassette holding means mounted in the apparatus. Tape drive means for transferring the magnetic tape contained in the tape cassette, optical detection means for detecting the transparent portions at the start and end of the magnetic tape when the magnetic tape is being transferred by the tape drive means, and a standard tape cassette Is inserted into the cassette holding means to block the optical path of the optical detecting means and the optical path of the optical detecting means when the standard holding cassette or small cassette is inserted into the cassette holding means and the cassette holding means is pushed. It is provided with a cassette insertion detecting means for blocking.

[0005]

With this construction, by utilizing the optical detecting means for detecting the leading and trailing ends of the magnetic tape, which is required in the conventional apparatus, it is possible to detect the cassette size and the pushing of the cassette. It is possible to easily realize a configuration that can perform detection without requiring a switch.

[0006]

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

FIG. 1 is a perspective view of the essential parts showing the construction of a cassette mounting apparatus according to an embodiment of the present invention. In FIG.
The cassette holder 1 is slidably engaged with the guide grooves 3b and 5c formed on the side wall members 4a and 4b arranged substantially vertically to the substrate 34 by the guide pins 3a and 3b formed on the side plates 2a and 2b. It fits. A cassette-size detection lever 41, which is rotatably supported by a shaft 40 integrally formed with the side wall member 4b, is rotationally biased in a clockwise direction in FIG.
And is in the state shown in FIG. The detection lever 41 is
When the tape cassette is not inserted into the cassette holder 1, the side wall member 4 is moved by the light shielding part 43 as shown in FIG.
It is in a position where the optical path hole 44 of b is not blocked. 2 is a side view of an essential part of this embodiment, and when the standard type cassette 31 is inserted into the cassette holder 1, the detection lever 41 is rotated counterclockwise in FIG. 2 by the standard type cassette 31.
As shown in, the light blocking portion 43 moves to a position where it blocks the optical path hole 44 of the side wall member 4b. FIG. 5 is a side view of the main part of this embodiment, and even if the small cassette 32 is inserted into the cassette holder 1, the detection lever 41 is arranged at a position where it does not contact the small cassette 32 as shown in the front view of the main part of FIG. Because it is done, it does not rotate.

FIG. 8 is a perspective view showing a means for detecting both ends (start end and end) of the magnetic tape of this embodiment. The magnetic tape 46 is pulled out by a plurality of tape pull-out members 45 provided on the substrate 34 so as to travel alongside a guide drum 47 having a built-in recording / reproducing head (not shown). The light 49 emitted from the light emitting portion 48 of the tape end detecting means is configured to go to the light receiving portion 50 for detecting the start end and the light receiving portion 51 for detecting the end end, and the magnetic tape 46 is arranged so as to block it. Has been transferred. The magnetic tape 43 does not allow light to pass through where the magnetic material is on the surface, but transparent parts are provided at both ends of the tape to detect the beginning and end of the tape. When that part comes, the light is received by the light receiving unit 50 or the light receiving unit 51. It is designed to detect when the end of the tape comes in.

FIG. 9 is a perspective view showing the structure of the drive mechanism of this embodiment. The drive arms 36 and 37 include the side wall member 4
Main guide pins on the side wall member 4a of the cassette holder 1 are formed in a guide groove 24 that is integrally formed with a shaft 39 that is rotatably supported by a and 4b, and that includes a relief portion 25 provided at the tip. 3b and 3c are engaged with each other. One side of the drive arm 36 or 37 is concentric with the shaft 39 and the gear 15
Are configured as a single unit. The driven rack 16 includes the side wall member 4
A guide groove 16a, 16b is engaged with two guide pieces 19a, 19b provided on a or 4b so as to be horizontally movable, and a rack tooth 18 formed at one end thereof engages with a gear 15 of a drive arm 36. It is in mesh. Similarly, the drive rack 17 is horizontally guided by two guide pieces 19a and 19b provided on the side wall member 4a or 4b.
7a and 17b are engaged with each other, and are engaged with a drive gear 20 which is rotationally driven by a drive motor (not shown) by rack teeth 35 formed in a region which does not engage with the gear 15 integrated with the drive arm 36. .. An urging spring 52 is stretched between the driven rack 16 and the drive rack 17, and the projection 16c provided on the driven rack 16 and the end surface of the square hole 17c provided on the drive rack 17 come into contact with each other. The teeth 18 and the rack teeth 35 are configured to have a predetermined positional relationship. The standard cassette 31 or the small cassette 32 is inserted into the cassette holder 1, and the cassette holder 1 is shown in FIG.
When pushed in from the state, the drive arm 36 rotates, the driven rack 16 slides against the biasing spring 52, and the light shielding portion 53 provided on the driven rack 16 causes the side wall member 4 to move.
The optical path hole 54 provided in a is closed to block the light entering the light receiving section 50 for detecting the start end, so that the insertion of the cassette can be detected.

The operation of the cassette mounting apparatus of the present invention constructed as above will be described below.

After the small cassette 32 is inserted into the cassette holder 1 through the insertion opening on the front of the apparatus and the state shown in FIGS. 5 and 6 is reached, when the small cassette 32 is further pushed, the drive arm 36 causes the timepiece shown in FIG. Direction, and the driven rack 16 having the rack teeth 18 meshing with the gear 15 integrated with the drive arm 36 is slid to the right in FIG. 10 against the biasing spring 52 to the state shown in FIG. Become. At this time, since the projecting portion 16c and the end surface of the square hole 17c are separated from each other,
The drive rack 17 has not moved. In addition, the driven rack 1
The light shielding portion 53 of 6 blocks the optical path hole 54 of the side wall member 4a,
It is detected that the light does not enter the light receiving unit 50 and the cassette is inserted and pushed into the cassette holder 1.
When light does not enter the light receiving unit 50, the other light receiving unit 5
Check condition 1. As shown in FIGS. 5 and 6, even when the small cassette 32 is inserted, the detection lever 41 does not rotate and the light 49 entering the light receiving unit 51 is not blocked. Therefore, it is determined that the small cassette is inserted. If it can be discriminated and the tape withdrawing member 45 is at the position corresponding to the standard type cassette 31, it is moved to the position corresponding to the small cassette 32 as shown in FIG. After determining the type of cassette, a drive motor (not shown) provided in the magnetic recording / reproducing apparatus main body in which the present apparatus is mounted starts to rotate, the output gear 20 rotates, and the drive rack 17 moves to the right in FIG. Moving in the direction, the protrusion 16c of the driven rack 16 and the square hole 1
Contact at 7c. After that, the drive rack 17 and the driven rack 16 move integrally and rotate the drive arms 36 and 37 in the clockwise direction. Therefore, the cassette holder 1 integrated with the guide pin 3b engaged with the guide groove 24 provided in the drive arms 36 and 37 moves horizontally from the vertical direction along the L-shaped guide groove portions 5b and 5c of the side wall members 4a and 4b. And the cassette mounting operation is completed, resulting in the state shown in FIG.

In this state, as shown in FIG. 12, the drive arms 36 and 37 are provided with guide pins 3b and 3d integrally formed on the side plates 2a and 2b of the cassette holder 1 in the escape portion 25 of the guide groove 24. It is rotating until it gets in. Therefore, the guide pins 3b and 3d are attached to the drive arm 3
6 and 37 are biased by springs by biasing members 25 and are mounted on a magnetic tape drive mechanism (not shown) formed on the substrate 34.

Next, the case where the standard cassette 31 is inserted into the apparatus will be described. FIG. 2 is a side view of essential parts showing a state in which the standard cassette 31 is inserted into the cassette holder 1. In FIG. 2, the standard type cassette 31 is inserted in a predetermined position of the cassette holder 1, and the detection lever 4
A reference numeral 1 designates a standard type cassette which is rotated counterclockwise in FIG.
It has rotated to a position that blocks the light. Standard cassette 3
When 1 is pushed in, the driven rack 16 moves in the same manner as in the case of the small cassette to block the light 49 entering the light receiving section 50, and it is detected that the cassette is inserted in the cassette holder 1. At this time, the light 49 entering the light receiving unit 51 is detected by the detection lever 41.
Since it is blocked by, it can be determined that the inserted cassette is a standard type cassette. Therefore, when the tape withdrawing member 45 is in a position corresponding to the small cassette 32, the tape withdrawing member 45 moves to a position corresponding to the position where the standard type cassette 31 is mounted on the substrate 34, as shown in FIG. To do. After that, the same operation as when the small cassette is mounted is performed, and the standard cassette 31 is mounted on the magnetic tape drive mechanism (not shown) formed on the substrate 34.

[0014]

As described above, according to the present invention, the cassette holding means for holding the standard type tape cassette and the small size tape cassette inserted in the apparatus and the magnetic tape contained in the tape cassette mounted in the apparatus are transferred. Tape drive means, optical detection means for detecting transparent portions at the beginning and end of the magnetic tape when the magnetic tape is being transported by the tape drive means, and optical detection means when a standard tape cassette is inserted into the cassette holding means. By including a cassette size detecting means for blocking the optical path of, and a cassette insertion detecting means for blocking the optical path of the optical detecting means when a standard type cassette or a small cassette is inserted into the cassette holding means and the cassette holding means is pushed, Since there is only one cassette holding mechanism, the structure is simple and thin, and the cassette size is small. Sensing and yet inexpensive because it does not require a dedicated detection switch for detecting the cassette pushing, can record reproducing the large and small types of cassettes without using cassette adapter, and conventional VH
It is possible to realize a cassette loading apparatus having the same operability as the front loading type cassette loading apparatus used in most of the S cassette dedicated apparatuses.

[Brief description of drawings]

FIG. 1 is a perspective view showing the configuration of a cassette mounting device according to an embodiment of the present invention.

FIG. 2 is a side view of essential parts showing a state in which a standard type cassette is inserted into the cassette mounting apparatus of the same embodiment.

FIG. 3 is a front view of essential parts showing a state in which a standard type cassette is inserted into the cassette mounting apparatus of the same embodiment.

FIG. 4 is a plan view of a main part showing a state in which a standard type cassette is attached to a position where a tape can be pulled out from a substrate in the embodiment.

FIG. 5 is a side view of an essential part showing a state in which a small cassette is inserted into the cassette mounting device of the embodiment.

FIG. 6 is a front view of a main part showing a state in which a small cassette is inserted into the cassette mounting device of the embodiment.

FIG. 7 is a plan view of a principal part showing a state in which a small cassette is mounted on a position where a tape can be pulled out from a substrate in the embodiment.

FIG. 8 is a perspective view showing the structure of a tape trailing edge detecting means of the embodiment.

FIG. 9 is a perspective view showing a configuration of a drive mechanism of the cassette mounting apparatus of the embodiment.

FIG. 10 is a side view of an essential part showing one mode of a drive mechanism of the cassette mounting apparatus of the embodiment.

FIG. 11 is a side view of essential parts showing one mode of a drive mechanism of the cassette mounting apparatus of the embodiment.

FIG. 12 is a side view of an essential part showing one mode of a drive mechanism of the cassette mounting apparatus of the embodiment.

[Explanation of symbols]

 1 Cassette Holder 2a Side Plate 4a Side Wall Member 7 Top Plate 16 Driven Rack 17 Drive Rack 29 Top Plate 31 Standard Cassette 32 Small Cassette 34 Substrate 36 Drive Arm 41 Detection Lever 45 Tape Drawout Member 47 Guide Drum 48 Light Emitting Section 50 (Starting Edge Detection 50 Light receiving part 51 (for end detection) Light emitting part

Claims (1)

[Claims] 1. A cassette mounting device mounted on a magnetic recording / reproducing device for recording / reproducing on a standard tape cassette and a small tape cassette smaller than the standard tape cassette, wherein the standard is inserted into the device. Type tape cassette and cassette holding means for holding the small tape cassette, tape driving means for transferring the magnetic tape contained in the tape cassette mounted in the apparatus, and the magnetic tape for transferring by the tape driving means. An optical detecting means for detecting the transparent portions at the start and end of the magnetic tape, a cassette size detecting means for interrupting the optical path of the optical detecting means when the standard type tape cassette is inserted into the cassette holding means, and the cassette. When the standard cassette or the small cassette is inserted into the holding means, the cassette holding means is A cassette mounting device, comprising: cassette insertion detecting means for blocking the optical path of the optical detecting means when pushed.