JPH0356977Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention is a sliding type device which is useful when applied to a band switching device of a tape recorder with a built-in radio receiver, etc., in which a radio receiver and a tape recorder are integrated. The present invention relates to a variable electric element mounting device.

[Conventional technology]

Conventionally, there have been provided tape recorders with built-in radio receivers that are capable of playing back cassette tapes and receiving radio broadcasts.

[Problem that the invention attempts to solve]

In this tape recorder with a built-in radio receiver, the receiving circuit constituting the radio receiver is built into the tape recorder main body, which is equipped with a tape drive mechanism, etc., so the receiving circuit is housed within the tape recorder main body. It is necessary to provide a space, which results in an increase in the size of the tape recorder body.

In particular, when the tape recorder body is miniaturized to a size that roughly corresponds to the external shape of a standard-sized so-called compact tape cassette, if a radio reception circuit is installed inside the tape recorder body, the radio The proportion of space occupied by the receiving circuit becomes extremely large, making it impossible to avoid increasing the size of the device itself.

Further, inside the tape recorder main body, there are provided various mechanisms including parts made of metal, such as a capstan and a capstan drive motor that constitute a tape running mechanism, and a tape reel drive mechanism. Therefore, if a bar antenna for AM wave reception is provided inside the tape recorder main body, the bar antenna will be covered with metal, and reception sensitivity characteristics cannot be maintained sufficiently. Furthermore, in order to improve the receiving sensitivity characteristics of the bar antenna installed inside the tape recorder body, it is necessary to separate the bar antenna from each mechanism made of metal or provide a shield mechanism.
It becomes impossible to avoid increasing the size of the equipment itself.

Therefore, we have developed a tape recorder with a built-in radio receiver, which is designed to be smaller and thinner without increasing the size of the tape recorder itself, and which does not cause deterioration of the reception sensitivity characteristics of the bar antenna for AM wave reception. Some tape recorders have functional components as a radio receiver, such as a radio receiving circuit, built into the cassette case lid of the tape recorder.

By the way, in order to enable the radio receiver built into the cassette case lid to receive and select a plurality of bands, and to improve the functionality of the radio receiver itself, a band switching device for spring switching is required. must also be built into the cassette case lid. However, simply arranging the functional parts of the various radio receivers in the cassette case lid increases the thickness of the cassette case lid, which deteriorates the operability when inserting and removing the tape cassette. becomes. Furthermore, it becomes impossible to achieve the original objective of downsizing the tape cassette to a size that approximately corresponds to the external shape of the tape cassette.

Therefore, the present invention was proposed in order to solve the above-mentioned conventional problems, and it is possible to make the cassette case lid smaller and thinner, and it is possible to record tapes without deteriorating the operability of the tape recorder. To provide a tape recorder which allows the recorder main body itself to be made smaller and thinner while maintaining mechanical strength, and which also has an excellent design without internal parts being visible even when observed from the outside of the device. It is an object of the present invention to provide a sliding type variable electric element mounting device that is useful for application to a band switching device of a tape recorder with a built-in radio receiver used in the industry.

[Means for solving problems]

In order to achieve the above object, the slide type variable electric element mounting device according to the present invention has a housing hole in a cover plate body which is provided in a cabinet body so as to be openable and closable, and which closes an opening provided in the cabinet body. A panel plate is laminated on the outside of the lid plate body, and a printed circuit board with an insertion hole is laminated on the inside to form a three-layer structure, and the panel plate is provided with a through hole, The flange portion of the switching body, which is composed of a flange portion, an engaging portion provided on the flange portion, and a knob portion protruding from the flange portion, is slidably accommodated in the storage hole, and the knob portion is inserted through the through hole. A sliding variable electric element is exposed to the outside of the panel board through the hole, and a sliding variable electric element is attached to the surface of the printed circuit board opposite to the surface that contacts the cover plate, and the operation part of the sliding variable electric element and the above-mentioned The fitting part is engaged through the insertion hole, and the operating part of the sliding variable electric element is slid by moving and operating the knob part outside the panel plate.

[Effect]

In this invention, a storage hole is provided in the lid plate body, the switching body is stored in this storage hole, and the switch body is laminated inside the lid plate body by slidingly operating the knob portion exposed to the outside from the through hole. The operating section of the sliding variable electric element attached to the printed circuit board is moved, and, for example, a band switching operation of a radio receiving circuit is performed.

〔Example〕

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

A tape recorder with a built-in radio receiver to which the present invention is applied is formed to have approximately the same external shape as a standard size so-called compact cassette in the state in which the tape cassette is not installed as shown in FIG. This tape recorder includes a tape recorder main body 1 and a cassette case lid 2 attached to the tape recorder main body 1 so as to be openable and closable.

As shown in FIG. 6, the tape recorder main body includes a main housing 3 and a sub-housing 4 that can be slid in and out of the main housing 3.
By pulling out the sub-housing 4 from the main housing 3, a tape cassette mounting portion 5 as an opening is formed on the upper surface of the tape recorder main body 1, as shown in FIG. A so-called compact tape cassette C is mounted on the tape cassette mounting section 5.

On the main housing 3 side of the tape recorder main body 1, all the mechanical parts necessary for the tape recorder, such as a tape running drive mechanism and a mode selection mechanism, are arranged. That is, as shown in FIG. 7, the main housing 3 has a pair of reel drive shafts 8 and 9, each of which engages a pair of reel hubs on which the magnetic tape of the tape cassette C is wound, serving as an opening for the tape cassette. It is provided to protrude from the bottom plate 7 of the mounting part 5. These reel drive shafts 8, 9
is selectively driven by a reel drive motor provided in the main housing 3 according to each mode such as playback mode, fast forward mode, or rewind mode.

Further, on the front side of the main housing 3, a capstan shaft 6, which constitutes a tape running mechanism that cooperates with a pinch roller (not shown) to pinch the magnetic tape and run the magnetic tape at a constant speed, is attached to the tape cassette mounting portion. 5 and is provided protrudingly. This capstan shaft 6 is rotationally driven by a capstan drive motor provided within the main housing 3.

In addition, a head storage section 10 is disposed on one front side of the main housing 3, in which a magnetic head exclusively used for reproduction, which slides into contact with the magnetic tape and reads audio signals recorded on the magnetic tape, is disposed. A battery storage section 11 in which a dry battery serving as a driving power source is stored in a manner that can be freely inserted and removed is provided in parallel in the longitudinal direction of the main housing 3. The head storage section 10
The rising side facing the tape cassette mounting section 5 is formed into an opening, and during a magnetic tape playback mode, the magnetic head projects from the opening into the tape cassette mounting section 5 and comes into sliding contact with the magnetic tape. Furthermore, a headphone jack 12 into which a connection plug for a headphone or earphone is inserted is provided at the end of the head storage section 10.

Furthermore, the head storage section 1 of the main housing 3
0 and the front side where the battery compartment 11 is provided, there are a playback mode selection button 13 and a stop button 1.
4. A fast forward mode selection button 15 and a rewind mode selection button 16 are provided in parallel. Furthermore, a volume control knob 17 is rotatably provided at the front corner of the bottom surface of the main housing 3. Further, on the side surface of the main housing 3, a tape recorder/radio receiver switching knob 18, a noise reduction switching knob 19, and a tape selection operating knob 20 are provided in parallel.

On the other hand, a cassette case lid 2 that covers the tape cassette mounting part 5 and supports the tape cassette C mounted on the tape cassette mounting part 5 is attached to the sub housing 4 which is slidably provided with respect to the main housing 3. It is set freely.
The cassette case lid 2 also functions as a lid plate for closing the tape cassette mounting section 5, and has side walls 22, 2
3 and a side wall 24 on the back side to form a box shape, and when the tape cassette mounting section 5 is closed, it covers and supports the tape cassette C mounted on the tape cassette mounting section 5, and forms a main body of the tape corader. 1. To attach the cassette case lid 2 to the sub-housing 4, the cylindrical parts provided alternately on the cassette case lid 2 and the sub-housing 4 are butted together to form a series, and a single rotating shaft is attached to these cylindrical parts. This is done via a hinge mechanism 25 that connects the cassette case lid 2 and the sub-housing rotatably through the shaft.

A synthetic resin display panel 26 is bonded to the surface of the cassette case lid 2. This display panel 26 is provided with a transparent tape remaining amount display window 27 approximately in the center thereof, which displays the remaining amount of tape in the tape cassette C loaded in the tape cassette loading section 15. A reception frequency scale of the radio receiver is printed on the side of the radio receiver. The reception frequency scale in this example is
It consists of three band frequency scale parts: an AM frequency scale part 28, a low channel scale part 29 for FM frequency and television broadcasting, and a high channel scale part 30 for television broadcasting, and each of these scale parts 2
8, 29, and 30 are provided in parallel. In addition, band switching display windows 31, 32, 33 that can be seen through correspond to these scale portions 28, 29, 30.
are provided, and the scale portions 28, 29,
Dial pointer running window 34 that can be seen through along 30
is provided. In other words, this display panel 26
The remaining portions except for the remaining tape amount display window 27, band switching display windows 31, 32, 33, and dial pointer running window 34 are printed with printing ink to make them opaque. This display panel 26 is
It is positioned on the protrusion 35 provided around the outer surface of the cassette case lid 2, and is bonded to the cassette case lid 2 with an adhesive member such as double-sided adhesive tape.

As shown in FIG. 1, the portion of the cassette case lid 2 corresponding to the remaining tape amount display window 27 is formed as a first notch 36 so that the inside can be seen through. Further, a portion corresponding to the dial pointer running window 34 is also cut out as a long hole 37.

In addition, on the inner surface of the cassette case lid 2, there is a first
As shown in the figure and FIG. 2, a printed wiring board 41 on which parts constituting a radio receiving circuit 40 constituting a radio receiving section such as a tuning circuit, an intermediate frequency amplification circuit, and a detection circuit are mounted is bonded and laminated. Ru. At approximately the center of this printed wiring board 41,
A notch 43 is provided for attaching a bar antenna 42 for receiving AM waves, which is formed into a flat thin plate shape and serves as a storage component. A pair of antenna holders 44 and 45 are attached to opposing surfaces of the notch 43 in the longitudinal direction. These antenna holders 44 and 45 are attached by holding the printed wiring board 41 between them by a pair of holding claws 47 and 48 protruding from the back side of a holder portion 46 that holds the end of the bar antenna 42. Then, the bar antenna 42 is inserted into the notch 43 and attached by fitting each end into the holder parts 46 of the antenna holders 44 and 45. When the bar antenna 42 is fitted into the antenna holders 44, 45, each end portion is pressed and supported by a locking claw 49 protruding from the holder portion 46, and the bar antenna 42 is
The printed wiring board 4 is prevented from falling off.
Attached to 1. In this way, the bar antenna 4
2 is formed into a flat thin plate shape and is inserted into the notch 43 and attached to the printed wiring board 41.
By using the space of the thickness of the printed wiring board 41, it can be mounted on the printed wiring board 41 without increasing the mounting space. The printed wiring board 41 to which the bar antenna 42 is attached in this manner is installed by engaging the engagement hole 52 with the positioning protrusion 51 formed by cutting and raising a part of the cassette case lid 2 to determine the mounting position. At the same time, as shown in FIGS. 2 and 3, the cassette case lid 2 is attached using an adhesive material such as double-sided adhesive tape through the flat back side where no circuit components are arranged.
The part of the cassette case lid 2 that is joined to the inner surface of the cassette case lid 2 where the bar antenna 42 is located is a second notch 53 that is continuous with the first notch 36 corresponding to the remaining tape amount display window 27, and the bar antenna We are trying to secure 42 storage spaces.

The radio receiving circuit 40 configured on the printed wiring board 41 attached to the cassette case lid 2 as described above includes flexible film-shaped printed wiring boards 54 and 55 disposed across the hinge mechanism 25. It is connected to a power supply circuit (not shown) and an audio output circuit (not shown) which are shared by the tape recorder provided in the tape corrader main body 1.

Note that the connection cord of a headphone or inphone connected to the headphone jack 12 is used as an antenna for receiving FM waves.

Furthermore, one side wall 22 of the cassette case lid 2
A linearly operated variable tuning element 56 is attached to the inner surface of the housing. This variable tuning element 56 is connected to a tuning mechanism 57 attached to the side wall 22.
Slide operation is performed by. This tuning mechanism 57 includes first, second and third pulleys 58, 59, 6 which are rotatably supported on the side wall 22.
0, the tuning system 61 is wound in a closed loop, and the middle part of this tuning system 61 is fixed to the operator 62 of the variable tuning element 56, and is attached coaxially to the rotating shaft of the first pulley 58. By rotating the tuned tuning knob 63, the variable tuning element 56 is slid. Tuning knob 6 above
3 is inserted into the cassette case lid 2 through a through hole 64 formed in the cassette case lid 2.
It protrudes from the front side of the body, and is rotated using this protruding portion.

Further, a dial pointer 6 is provided on the operator 62.
2a is attached, and this dial pointer 62a is
Facing the dial pointer running window 34 of the cassette case lid 2, the dial pointer moves along the dial pointer running window 34 in response to the rotational operation of the tuning knob 63, and sets the predetermined frequency scale of each dial scale portion 28, 29, 30. guidelines.

An operating lever 66 is disposed between the cassette case lid 2 and the printed wiring board 41 and serves as a switching body for operating a band switching switch 65 as a sliding variable electric element attached to the printed wiring board 41. Ru. This operating lever 66 is formed as a long thin plate-like flange part made of synthetic resin, has a concave engaging part 68 at one end that engages with the operating element 67 of the band changeover switch 65, and has a wide part at the other end. There are display marks 69, 70 facing the band switching display windows 31, 32, 33,
71 is applied by printing.

By the way, the band changeover switch 65 is mounted on the surface of the printed wiring board 41 opposite to the surface that comes into contact with the cassette case lid 2.
A push-through hole 41a is provided at a position facing the operating section 67.
is drilled. Then, the operation part 6 of the band changeover switch 65 is inserted through the insertion hole 41a.
7 and the engaging portion 68 of the operating lever 66 are relatively engaged.

Furthermore, as shown in FIG. 4, an operating knob 72 is provided protruding approximately at the center of the front surface of the operating lever 66. As shown in FIG. The operating lever 66 then connects the engaging portion 68 to the operating element 67 of the band changeover switch 65.
and make the display marks 69, 70, 71 correspond to the band switching display windows 31, 32, 33,
Storage hole 7 formed by cutting out the cassette case lid 2
The operation knob 72 is provided in the cassette case lid 2 so as to protrude from the surface of the cassette case lid 2 through a through hole 74 formed in the cassette case lid 2, and is mounted between the display panel 26 and the printed wiring board 41. The operating lever 66 installed in this manner switches the band switching switch 65 by sliding the operating knob 72, and displays the display marks 69, 70, 71 according to the switching position of the band switching switch 65. One of the band switching display windows 31, 32, 33 corresponds to the predetermined band selected by the band switching switch 65.
to display the selected band.

The band switching display mechanism having the operation lever 66 as described above has a part of the cassette case lid 2 placed between the display panel 26 and the printed wiring board 41 which are stacked on the cassette case lid 2. Since the flange portion of the operation lever 66 formed in a thin plate shape is disposed in the storage hole 73 formed by cutting out the cassette case, the thickness of the cassette case lid 2 can be reduced by providing this operation lever 66. It never happens. Furthermore, the band switching display is performed by switching the display marks 69, 70, 71 provided on the operating lever 66 into the display windows 31, 3 according to the switching of the band.
2, 33, and does not use electrical display means.
There is no power consumption. Therefore, it is extremely useful when applied to small-sized devices that cannot incorporate a large amount of power source.

That is, in this embodiment, the first and second notches 36, 53 and the storage hole 73 are bored in the cassette case lid 2, and the bar antenna 42 is stored in the second notch 53, and the storage hole 73 is opened. By disposing an operating lever 66 at 73, the tape recorder main body 1 can be made smaller and thinner. Further, since a printed wiring board 41 is arranged in a stacked manner on the back surface of the cassette case lid 2, the mechanical strength of the cassette case lid is prevented from being weakened. Furthermore, the second notch 5
Since the display panel 26 is attached to a portion corresponding to the storage hole 73 and the printed wiring board 41, the bar antenna 42 held on the printed wiring board 41, and the storage hole 73
The operating lever 66 and the like disposed on the tape recorder are not visible from the outside of the cassette case lid 2, and the appearance of the tape recorder itself is not spoiled.

It should be noted that the printed wiring board 41 and the tuning mechanism 57, which are laminated on the inner surface of the cassette case lid 2 as described above, are attached to the cassette case lid 2.
It is covered with a cover plate 76 which is attached with screws 75 to protect the printed wiring board 41 from touching the circuit components and the like.

[Effect of idea]

As described above, in the present invention, a storage hole is provided in the cover plate body, the switching body is stored in the storage hole, and the knob portion protruding to the outside from the through hole provided in the panel plate is slidably operated. As a result, the structure is such that the switching operation of the sliding variable electric element attached to the printed wiring board is performed, and the switching body is housed in the storage hole provided in the cover plate, resulting in a thinner overall device. can be achieved.

Further, even if the storage hole is provided in the cover plate as described above, the mechanical strength will not be weakened because the printed wiring board is laminated on the cover plate.

Furthermore, since a panel plate is attached to the front side of the lid plate body, storage components such as a printed wiring board and a bar antenna attached to this printed wiring board can be covered with the panel plate, The above-mentioned stored components can be made invisible from the outside of the device, and the device can be configured with an excellent design.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view showing the cassette case lid of a tape recorder with a built-in radio receiver to which the present invention is applied, and Fig. 2 is a perspective view showing the printed wiring board attached to the cassette case lid. Fig. 3 is a sectional view of the cassette case lid, Fig. 4 is a perspective view showing the operating lever for band switching, and Fig. 5 shows a tape recorder with a built-in radio receiver. FIG. 6 is a perspective view showing the tape cassette installed, and FIG. 7 is an external perspective view showing the cabinet plate opened. DESCRIPTION OF SYMBOLS 1... Tape recorder main body, 2... Cassette case lid, 26... Display panel, 41... Printed wiring board, 41a... Insertion hole, 66... Operation lever, 68... Engaging portion, 72... Operation knob, 73
... Storage hole, 74 ... Through hole.

Claims (1)

[Scope of Claim for Utility Model Registration] A storage hole is bored through a cover plate body which is provided in the cabinet body so as to be openable and closable and which closes an opening provided in the cabinet body, and the outer side of the cover plate body is A three-layer structure is created by stacking panel boards on top of each other, and a printed circuit board with an insertion hole on the inside.The panel board has a through hole, and the flange part and the engaging part provided on this flange part are connected to each other. The flange portion of the switching body, which includes a knob portion protruding from the flange portion, is slidably housed in the storage hole, and the knob portion is exposed to the outside of the panel board through the through hole, and the printed circuit board A sliding variable electric element is attached to the surface opposite to the surface that contacts the lid plate body, and the operating part of the sliding variable electric element and the engaging part are engaged through the insertion hole, and the panel plate A mounting device for a sliding variable electric element, wherein the operating section of the sliding variable electric element is slid by moving the external knob section.