JPH0411276Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to electronic equipment such as a radio receiver, a tape recorder, a tape recorder with a built-in radio receiver, and the like.

[Conventional technology]

Conventionally, in order to improve the quality of electronic devices such as radio receivers and tape recorders, electronic devices have been required to have multiple functions, and have also been required to be smaller and thinner. . For example, in order to achieve multi-functionality, electronic devices with various complex functions, such as a tape recorder with a built-in radio receiver that can play cassette tapes and receive radio broadcasts, are configured in a small and thin manner. is provided.

[Problem that the invention attempts to solve]

As mentioned above, the multi-functional electronic device is
For example, in the case of the above-mentioned tape recorder with a built-in radio receiver, it is necessary to incorporate the reception circuit etc. as the radio receiver into the tape recorder body equipped with a tape drive mechanism, etc. Merely incorporating a mechanism would result in an increase in the size of the electronic equipment device due to the increase in the number of stored parts.

In particular, when the entire electronic device is miniaturized to a size that approximates the external size of a so-called compact tape cassette, which is the standard size of the tape recorder main body formed as a cabinet, a radio receiving circuit is installed inside the tape recorder main body. As a result, the ratio of the radio receiving circuit housing space to the entire tape recorder body became extremely large, and the thickness of the tape recorder body itself increased, resulting in a reduction in size to a size that approximated the external shape of the tape cassette, which was the original objective. requirements cannot be met.

Therefore, the present invention was proposed in order to solve the above-mentioned conventional problems, and even when a cabinet is configured as an entire electronic device, it can be made smaller and thinner, and the mechanical It is an object of the present invention to provide an electronic device that maintains strength and has an excellent design without internal parts being visible even when observed from the outside of the device.

[Means for solving problems]

In order to achieve the above object, an electronic device according to the present invention includes a cabinet board having a penetrating storage hole for storing and arranging storage components, a printed wiring board laminated on the back surface of the cabinet board, and a printed wiring board laminated on the back surface of the cabinet board. A display panel is placed opposite to the surface of the cabinet board to close the storage hole, and the display panel, the cabinet board, and the printed wiring board form a three-layer laminated structure, and some of the parts attached to the printed wiring board are It is arranged to be stored in the storage hole.

[Effect]

In the present invention, since the storage hole is provided in the cabinet board, a part of the components attached to the printed wiring board can be stored in this storage hole. Therefore, even when a cabinet is configured as an electronic device, the entire electronic device can be made smaller and thinner.

Further, since a printed wiring board is provided on the back surface of the cabinet board, the mechanical strength of the electronic device itself can be maintained.

Furthermore, since a display panel is attached to the surface of the cabinet board, the printed circuit board and the parts attached to the printed circuit board are not visible from the outside of the device.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. In this embodiment, an application of the present invention to a tape recorder with a built-in radio receiver will be described.

The tape recorder with a built-in radio receiver according to the present invention is formed to have approximately the same external shape as a standard-sized so-called compact cassette when 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 this sub-housing 4 from the main housing 3, a tape cassette mounting part 5 is formed on the upper surface of the tape recorder main body 1 as shown in FIG. It becomes ready to be attached to the main body 1.

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, in the main housing 3, 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, are attached to the tape cassette mounting portion 5. It is provided to protrude from the bottom plate 7. These reel drive shafts 8 and 9 are operated by a reel drive motor provided within the main housing 3.
It is selectively driven 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 section. 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 part 5 is an open part, and in the magnetic tape playback mode, the magnetic head projects from the opening into the tape cassette mounting part 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, there is a switching operation knob 18 for tape recorder and radio receiver, a switching operation knob 19 for noise reduction, and an operation knob 2 for tape selection.
0 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.
This cassette case lid 2 has side walls 22 and 23 on both sides of a lid main body 21 that are sufficient to cover the entire surface of the tape cassette mounting section 5, and a side wall 24 on the back side.
When the tape cassette mounting portion 5 is closed, the tape cassette mounting portion 5
covering and supporting the tape cassette C attached to the
It is configured as a cabinet plate of the tape recorder main body 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 these cylindrical parts are fitted with one rotating shaft. 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 respective 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
are tape remaining amount display window 27, band switching display window 3
1, 32, 33, and the dial pointer running window 34, the rest are printed with printing ink to make them opaque. The display panel 26 is formed by a protrusion 35 provided around the outer surface of the cassette case lid 2.
2, and is bonded to the cassette case lid 2 using 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 has a first storage hole 36 that passes through the cassette case lid 2 so that the inside can be seen through.
It is said that In addition, the dial pointer running window 34
The portion corresponding to 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 FIG. 2 and FIG. 2, a printed wiring board 41 on which parts constituting a radio receiving circuit 40 constituting a radio receiver such as a tuning circuit, an intermediate frequency amplification circuit, and a detection circuit are mounted is bonded and laminated. Ru. Approximately at the center of this printed wiring board 41, there is an AM formed in the shape of a flat thin plate that serves as a storage component.
A cutout 43 is provided for mounting a bar antenna 42 for wave reception. 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 a pair of holding claws 47 and 48 that protrude 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. The bar antenna 42 is
When fitted into the antenna holders 44, 45, each end is pressed and supported by a locking claw 49 protruding from the holder portion 46, and the antenna holders 44, 4 are fitted into the antenna holders 44, 45.
It is attached to the printed wiring board 41 while being prevented from falling off from the printed wiring board 41. In this way, the bar antenna 42 is formed into a flat thin plate shape and is attached to the printed wiring board 41 by inserting it into the notch 43, so that the mounting space can be enlarged by utilizing the space of the thickness of the printed wiring board 41. It can be attached to this printed wiring board 41 without having to do anything.
The engagement hole 52 is inserted into the positioning protrusion 51 formed by cutting and raising a part of the cassette case lid 2 on the printed wiring board 41 on which the bar antenna 42 is attached.
At the same time, as shown in FIGS. 2 and 3, attach the cassette to the cassette using an adhesive material such as double-sided adhesive tape through the flat back side where no circuit components are placed. It is joined to the inner surface of the case lid 2. Cassette case lid 2
The part where the bar antenna 42 is located is a second storage hole 53 that is continuous with the first storage hole 36 corresponding to the remaining tape amount display window 27, and the bar antenna 4
I try to secure 2 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 that are 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 with the tape recorder provided in the tape recorder main body 1.

Note that a connection cord for a headphone or earphone 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, and 6 that are rotatably supported on the side wall 22.
A tuning thread 61 is wound in a closed loop between 0 and 50, and the middle part of this tuning thread 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, which is a storage component, is disposed between the cassette case lid 2 and the printed wiring board 41 to operate a band changeover switch 65 attached to the printed wiring board 41. The operating lever 66 is formed into a long thin plate shape made of synthetic resin, and has a concave engaging portion 68 at one end that engages with the operating element 67 of the band changeover switch 65.
Display marks 69, 7 facing the band switching display windows 31, 32, 33 are provided on the wide part on the other end side.
0.71 is applied by printing. Further, as shown in FIG. 4, an operating knob 72 is provided approximately at the center of the front surface. The operating lever 66 then moves the engaging portion 68 to the band switching switch 6.
5, and display marks 69, 7.
0, 71 as band switching display window 31, 32, 33
The operation knob 72 is disposed in a third storage hole 73 formed by cutting out the cassette case lid 2, and the operating knob 72 is inserted into the surface of the cassette case lid 2 through a long hole 74 formed in the cassette case lid 2. The display panel 26 and the printed wiring board 41 are sandwiched 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 them 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 having the operation lever 66 as described above is connected to the cassette case lid 2.
A thin plate-like operating lever 66 is disposed in a third storage hole 73 formed by cutting out a part of the cassette case lid 2 between the display panel 26 and the printed wiring board 41 which are stacked on the display panel 26 and the printed wiring board 41. It is composed of
By providing this operating lever 66, the thickness of the cassette case lid 2 is not increased. Further, the band switching display is such that display marks 69, 70, 71 provided on the operating lever 66 are displayed selectively facing one of the switching display windows 31, 32, 33 according to the switching of the band. Since no electrical display means are used, no power is consumed. 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 storage hole 53 and the third storage hole 73 are formed in the cassette case lid 2,
By housing the bar antenna 42 in the second housing hole 53 and disposing the operating lever 66 in the third housing hole 73, the tape recorder main body can be made smaller and thinner. Further, since the 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 2 is prevented from being weakened. Further, since the display panel 26 is attached to the portions corresponding to the first, second, and third storage holes 36, 53, and 73, the display panel 26 is attached to the portions corresponding to the first, second, and third storage holes 36, 53, and 73. bar antenna 42, and further the operating lever 66 disposed in the third storage hole 73.
etc. 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]

According to the present invention, even when a cabinet is configured as an electronic device, a part of the components attached to the printed wiring board can be stored in the storage hole provided in the cabinet plate that constitutes the cabinet. Therefore, the entire device can be made thinner.

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

Furthermore, since a display panel is attached to the surface of the cabinet board at a portion corresponding to the storage hole provided in the cabinet board, a printed wiring board and a bar antenna attached to this printed wiring board, etc. An electronic device with excellent design can be obtained without the stored components being visible from the outside of the device.

[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 according to an embodiment of the present invention, and FIG. 2 shows a printed wiring board attached to the cassette case lid. 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 is a tape recorder with a built-in radio receiver; FIG. 6 is a perspective view showing the cassette in an unloaded state, FIG. 6 is a perspective view showing the tape cassette in an attached state, and FIG. 7 is an external perspective view showing the cassette case with the lid open. DESCRIPTION OF SYMBOLS 1... Tape recorder body, 2... Cassette case lid, 26... Display panel, 36... First storage hole, 41... Printed wiring board, 42... Bar antenna, 53... Second storage hole. , 66...operation lever, 73...third storage hole.

Claims (1)

[Scope of utility model registration request] A storage hole is provided through the cabinet board for storing and arranging the storage components, a printed wiring board is laminated and provided on the back side of the cabinet board, and a display panel is placed opposite to the front surface of the cabinet board to form the storage hole. The electronic device has a three-layer laminated structure including the display panel, the cabinet board, and the printed wiring board, and a part of the components attached to the printed wiring board is housed in the storage hole.