KR910004681Y1 - Tape cassette player and radio receiver - Google Patents

Abstract

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Description

Radio Receiver Built-in Tape Recorder

1 is a perspective view showing a radio receiver built-in tape recorder according to the present invention, and showing the unloaded state of the tape cassette.

2 is a perspective view showing a loaded state of a tape cassette.

3 is an external perspective view showing a cassette case cover opened.

4 is an exploded perspective view showing a part of a cassette case cover.

5 is a perspective view of a printed wiring board mounted on a cassette case cover.

6 is a cross-sectional view of the cassette case cover.

7 is a perspective view of the operation lever for band switching.

* Explanation of symbols for main parts of the drawings

1: tape recorder body 2: cassette case cover

40: radio receiver circuit 41: printed wiring board

42: bar antenna

The present invention relates to a radio receiver-embedded tape recorder in which a radio receiver and a tape recorder are integrally formed.

BACKGROUND ART [0002] A tape recorder having a built-in radio receiver capable of reproducing cassette tapes and receiving radio broadcasts has been conventionally provided.

However, the conventionally provided radio recorder with built-in radio receiver has a receiving circuit constituting the radio receiver in a tape recorder main body provided with a tape driving mechanism or the like, so that the receiver circuit is accommodated in the tape recorder main body. It is necessary to form a tape and caused an increase in the size of the tape recorder body.

In particular, when the tape recorder main body is downsized to a size close to the appearance of the so-called compact size tape cassette of the standard size, when the radio receiver circuit is formed in the tape recorder main body, the radio receiver circuit is stored for the entire tape recorder main body. The ratio of space becomes so large that the tape recorder itself becomes larger.

In the tape recorder main body, there is formed a mechanism composed of metal parts such as a capstan, a capstan drive motor, and a tape rail drive mechanism that constitute the tape running mechanism. Therefore, when the bar antenna for AM wave reception is installed in the tape recorder main body, the bar antenna is covered with metal and is excreted, so that the reception sensitivity cannot be sufficiently maintained. Furthermore, in order to improve the reception sensitivity of the bar antenna installed in the tape recorder main body, it is necessary to install the bar antenna away from each mechanism made of metal, or to install a shield mechanism. It cannot be avoided that the order itself is enlarged.

Therefore, the present invention aims to provide a radio receiver-embedded tape recorder that enables miniaturization and thinning without the tape recorder itself being enlarged, thereby enabling the radio receiver to be built in.

It is also an object of the present invention to provide a radio receiver-embedded tape recorder which does not cause chlorination of the reception sensitivity of a bar antenna for AM wave reception.

The present invention is installed in the tape recorder main body with opening and closing material, and focuses on the cassette case cover covering the tape cassette mounting part formed on the tape recorder main body, and the radio receiver and the bar antenna for AM wave reception are mounted on the cassette case cover. Therefore, it is possible to provide a tape recorder incorporating a radio receiver without causing an increase in the size of the main body of the tape reel recorder, and thus, the size of the tape recorder itself.

EXAMPLE

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

The radio receiver-embedded tape recorder according to the present invention is formed in the same size as that of the so-called compact cassette of the standard size in the unmounted state of the tape cassette shown in FIG. The tape recorder includes a tape recorder main body 1 and a cassette case cover 2 mounted on the tape recorder main body 1 with opening and closing materials.

As shown in FIG. 2, the tape recorder main body includes a main housing 3 and a load housing 4 that slides in and out of the main housing 3, and the load housing 4 As shown in FIG. 3, the tape cassette mounting portion 5 is formed on the upper surface of the tape recorder main body 1 as shown in FIG. 3, so that the so-called compact tape cassette C is tape recorder. It becomes the state which can be attached to the order main body 1. As shown in FIG.

On the main housing 3 side of the tape recorder main body 1, all of the mechanism parts such as a tape running drive mechanism, a mode selecting mechanism, and the like necessary for the tape recorder are disposed. That is, as shown in FIG. 3, the main housing 3 has a pair of rail drive shafts 8, 9 connected to a pair of rail hubs on which the magnetic tape of the tape cassette C is wound. It protrudes from the bottom plate 7 of the cassette mounting part 5, and is provided. These rail drive shafts 8 and 9 are selectively driven in accordance with each mode such as a regeneration mode, a feed or a rewind mode by a rail drive motor provided in the main housing 3.

In addition, on the front side of the main housing 3, the capstan shaft 6 constituting the tape running mechanism which cooperates with a pinch roller (not shown) and clamps the magnetic tape and runs this magnetic tape at a constant speed. It is attached to the cassette mounting part 5 protrudingly. The capstan shaft 6 is rotationally driven by a capstan drive motor mounted in the main housing 3.

In addition, a head storage portion 10 in which a front portion of the main housing 3 is placed in contact with a magnetic tape and accommodates and reproduces an audio signal recorded on the magnetic tape and a read-only magnetic head for reading, and a driving power source. The battery storage part 11 in which the used battery is stored in the access material is formed in parallel in the longitudinal direction of the main housing 3. The raised side portion of the head housing portion 10 facing the tape cassette mounting portion 5 becomes an opening portion, and during the regeneration mode of the magnetic tape, the magnetic head protrudes into the tape cassette mounting portion 5 at the opening portion. It comes into contact with the magnetic tape. Further, at the end of the head storage portion 10, a headphone jack 12 into which a connection plug of a headphone or earphone is inserted is formed.

Further, on the side of the front side where the head housing portion 10 and the head storage portion 11 of the main housing 3 are formed, a regeneration mode selection button 13, a stop button 14, a feeding mode button 15 and The rewind mode selection button 16 is installed in parallel. Further, a tape recorder, a switching operation knob 18 of a radio receiver, a switching operation knob 19 of a noise reduction, and an operation knob 20 for selecting a tape are attached to the side of the main housing 3 in parallel. .

On the other hand, the load housing 4 mounted on the slide housing with respect to the main housing 3 covers the tape cassette mounting portion 5 and supports the tape cassette C mounted on the tape cassette mounting portion 5. The cassette case cover 2 is installed as an opening and closing material. The cassette case cover 2 forms side walls 22 and 23 on both sides of the main body 21 so as to cover the entire surface of the tape cassette mounting portion 5, and the side walls 24 on the back side. Is formed into a box shape, and when the tape cassette mounting portion 5 is closed, the tape cassette C mounted on the tape cassette mounting portion 5 is covered and supported. The installation of the cassette case lid 2 on the load housing 4 is performed by fitting a cylindrical portion mounted alternately on the cassette case lid 2 and the load housing 4 in series and at the same time on one of these cylindrical portions. Is carried out via a hinge mechanism (25) which connects the cassette case cover (2) and the load housing with the rotating materials by inserting the rotating shaft.

The surface panel 26 of synthetic resin is bonded to the surface of the cassette case cover 2. On the surface panel 26, a transparent tape remaining amount display window 27 for displaying the remaining amount of tape of the tape cassette C mounted on the tape cassette mounting portion 5 is formed almost in the center thereof. On the side, the reception frequency scale of the radio receiver is formed by printing. In the present embodiment, the reception frequency scale includes the AM frequency scale 28, the FM frequency and the low channel scale 29 for TV broadcasting, and the three band frequency scale for the high channel scale 30 for TV broadcasting. It is comprised by the part and these scale parts 28, 29, 30 are formed in parallel. In addition, band switching display windows 31, 32, 33 are formed corresponding to each of the graduations 28, 29, 30, and are transparent according to the graduations 28, 29, 30. A dial instruction window 34 is formed. The surface channel 26 is positioned on the protrusion 35 formed on the outer periphery of the cassette case cover 2 and joined to the cassette case cover 2 by an adhesive member such as a double-sided adhesive tape.

The portion corresponding to the tape remaining amount display window 27 of the cassette case lid 2 is a notch 36 so as to see through the inside, as shown in FIG. In addition, the part corresponding to the dial instruction window 34 is also cut into the long hole 37.

In the inner surface of the cassette case lid 2, as shown in FIGS. 4 and 5, a print comprising a radio receiver circuit 40 constituting a radio receiver such as a tuning circuit, an intermediate frequency amplifier circuit, and a detector circuit. The wiring board 41 is disposed. In the roughly central portion of the printed wiring board 41, a cutout portion 43 for attaching the bar antenna 42 for AM wave reception formed in the shape of a flat plate is formed. A pair of antenna holders 44 and 45 are attached to the surface facing the longitudinal direction of this cutout 43. These antenna holders 44 and 45 are formed of a printed wiring board by a pair of clamping clicks 47 and 48 protruding from the back side of the holder portion 46 supporting the end of the bar antenna 42. 41 is clamped and attached. Then, the bar antenna 42 is inserted into the cutout portion 43 and is fitted by fitting each end to the holder portion 46 of the antenna holders 44 and 45. When the bar antenna 42 is fitted to the antenna holders 44 and 45, each end portion is pressed and supported by the connecting click 49 protruding from the holder portion 46, and the antenna holder ( Dropping from 44) (45) is prevented and attached to the printed wiring board 41. Thus, the bar antenna 42 is formed in the shape of a flat plate, inserted into the cutout 43 and attached to the printed wiring board 41, so that the attachment space is formed by using the space of the thickness of the printed wiring board 41. It can be attached to the printed wiring board 41 without making it large. In this way, the printed wiring board 41 having the bar antenna 42 attached thereto engages the coupling hole 52 with the positioning projection 51 formed by cutting a part of the cassette case cover 2, thereby positioning the attachment position. By attaching and attaching to each other, as shown in FIGS. 5 and 6, the inner side of the cassette case lid 2 is joined by an adhesive member such as a double-sided adhesive tape through a flat rear surface side on which circuit components are not disposed. The portion where the bar antenna 42 of the cassette case cover 2 is located becomes the cutout portion 53 which is continuous to the cutout portion 36 corresponding to the tape remaining amount display window 27, and the bar antenna 42 has The storage space is secured.

As described above, the radio receiver circuit 40 constituted on the printed circuit board 41 attached to the cassette case cover 2 has a fusible film-like printed wiring board disposed across the portion of the hinge mechanism 25 ( 54 and 55 are connected to a power supply circuit and an audio output circuit (not shown) which are common to the tape recorder mounted in the tape recorder main body 1.

As the FM wave receiving antenna, a connection cord of headphones or earphones connected to the headphone jack 12 is used.

Then, a barrier 56 of linear operation type is attached to the inner surface side of one side wall 22 of the cassette case lid 2. This barrier 56 is slide-operated by the tuning mechanism 57 attached to the side wall 22.

The tuning mechanism 57 is a tuning thread 61 between the first, second and third pulleys 58, 59 and 60 which are supported by the side wall 22 with a rotating material. Is wound into a Lulu shape, and at the same time, the middle portion of the tuning yarn 61 is fixed to the operator 62 of the variicon 56 and coaxially with the rotation shaft of the first pulley 58. It is configured to slide the baricone 56 by rotating the mounted tuning knob 63. FIG. A portion of the tuning knob 63 protrudes to the surface side of the cassette case cover 2 through a perforation 64 installed in the cassette case cover 2, and has this protrusion. It is operated by rotation.

A dial guide 65 is placed on the operator 62, and the dial guide 65 faces the dial guide window 34 of the cassette case cover 2, and the tuning knob 63 is turned on. Corresponding to the rotational operation of), it moves along the dial guided travel window 34, and guides a predetermined frequency scale of each dial scale portion 28, 29, 30.

Then, between the cassette case cover 2 and the printed wiring board 41, an operation lever 66 for switching the band switching switching 65 attached to the printed wiring board 41 is disposed. The operation lever 66 is formed in a long thin plate shape by a synthetic resin, and has a yaw-shaped coupling portion 68 engaged with the operator 67 of the band changeover switch 65 at one end thereof. The display marks 69, 70, 71 facing the band switching display windows 31, 32, 33 are processed by printing in the wide part of the other end side. Moreover, the operation knob 72 protrudes in the substantially center part of the surface side, as shown in FIG. In addition, the operation lever 66 couples the engaging portion 68 to the operator 67 of the band selector switch 65, and the display marks 69, 70, and 71 are changed into the band selector display windows 31 and 32. Corresponding to (33), the cassette case cover (2) is disposed in the notched sliding groove (73), and the operation handle (72) is installed in the cassette case cover (2) from the long hole (74). It protrudes on the surface of (2), and is clamped and attached by the surface panel 26 and the printed wiring board 41. As shown in FIG. The operation lever 66 thus attached is operated by operating the operation knob 72 to perform the switching operation of the band switching switch 65 and the display mark 69 according to the switching position of the band switching switch 65. One of (70) (71) faces the band switching display windows (31) (32) (33) corresponding to the predetermined band selected by the band switching switch (65) and displays the selected band.

The band switching display mechanism comprising the operation lever 66 as described above is provided between the cassette case cover 2 between the surface panel 26 and the printed wiring board 41 which are stacked and disposed on the cassette cover 2. Since a thin plate-shaped operating lever 66 is disposed in the sliding groove 73 formed by cutting a part of the above, it is possible to increase the thickness of the cassette case cover 2 while installing the operating lever 66. none. Moreover, the band switching display selectively removes the display marks 69, 70 and 71 formed on the operating lever 66 from one of the switching display windows 31, 32 and 33 according to the switching of the band. It is for display, and since no electrical display means is used, no power consumption is consumed. Therefore, it is very useful to apply to the small thing which cannot incorporate a large amount of power supply.

In addition, as described above, the printed wiring board 41 and the tuning mechanism 57 stacked on the inner side of the cassette case cover 2 are mounted on the cassette case cover 2 by a vis 75. It is covered by the cover plate 76 and protected from touching the circuit parts attached to the printed wiring board 41 and the like.

According to the above-described radio receiver built-in tape recorder according to the present invention, the radio receiver circuit 40 is formed on the printed wiring board 41, and the printed wiring board 41 is integrally equipped with the mechanism parts necessary for the tape recorder. The printed wiring board 41 can be mounted using almost the entire surface of the inner surface of the cassette case cover 2 because it is bonded and disposed on the inner surface of the cassette case cover 2 which is not used. Therefore, since the necessary radio receiver circuit 40 can be formed by one printed wiring board 41, the thickness of the radio receiver can be achieved. In addition, since the radio receiver is not required to be mounted on the tape recorder main body 1 side, the tape recorder main body is not enlarged due to the radio receiver mounting.

In addition, since the radio receiver is mounted on the cassette case cover 2, the scale of the reception frequency indicating the reception frequency can be installed on the surface of the cassette case cover 2, so that the reception frequency can be easily confirmed. In addition, since the tuning knob 63 can also be operated from the surface side of the cassette case lid 2, the operation thereof becomes simple.

Further, even if the cassette case cover 2 is formed of synthetic resin or a thin aluminum plate, it is possible to prevent deformation due to warpage or the like of the cassette case cover 2 stacked thereon, thereby ensuring a reliable closing state. You can get

In addition, since the radio receiving unit can be combined with the tape recorder main body 1, the joining operation can be simplified, and the disassembly operation in subsequent maintenance is also simplified.

In particular, in the tape receiver of the radio receiver built-in type according to the present invention, since the bar antenna 42 for AM wave reception is mounted on the cassette case cover 2 through the printed wiring board 41, the bar antenna 42 is provided. Since it is not surrounded by metal parts, it does not cause deterioration of reception sensitivity characteristics. The bar antenna 42 is installed by using the cassette case cover 2 having a large area, so that the bar antenna 42 can be thinned and installed. Therefore, sufficient thickness can be achieved without causing the tape recorder itself to be enlarged.

Claims (1)

A tape recorder body with a tape recorder body and a cassette case cover mounted on the tape recorder body with opening and closing materials. The cassette recorder includes a radio receiver and a bar antenna for AM wave reception.