JPH06302978A - Electronic device - Google Patents

Abstract

PURPOSE:To enable a substrate bracket to position and support a switch substrate and to cover the switch substrate together with the front panel section of an outer enclosure by firmly fixing the substrate bracket to the rear surface section of the front panel section. CONSTITUTION:When a substrate bracket 2 is fixed to the rear surface section of a front panel section 1 with set screws 7 and 7, each rib 3a of the bracket 2 positions and supports a switch substrate 3 and, at the same time, the bracket 2 covers the substrate 3 together with the front panel section 1 and a button plate 4. Therefore, the electronic device can be easily assembled, because the plate 4 and substrate 3 can be positioned when the bracket 2 is fixed to the section 1. In addition, since the plate substrate 3 is covered with the bracket 2 and section 1, the substrate is protected against the outside air and, even when dew condensation occurs on a CRT, dropping of water drops, etc., can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device such as a television receiver.

[0002]

2. Description of the Related Art Conventionally, an electronic device such as a television set has a front panel section 10 as shown in FIGS.
1 and the rear housing part 110, and the circuit board 103 which is housed in this outer housing and constitutes an electronic circuit part. And in such an electronic device, for controlling the operation of the electronic circuit unit,
Some have a plurality of operation buttons 111 provided on the front panel section 101 of the outer casing.

The plurality of operation buttons 111 are integrally connected to a substantially flat plate-shaped button plate 104 via a thin portion, and the thin portion elastically displaces the button plate 104. It is supposed to be movable. Each of the operation buttons 111 has the button plate 104 attached to the front panel portion 101 by a pair of setscrews 7, 7 so that the front panel portion 10 can be operated.
It is movably supported with respect to 1. Button plate 10 above
4 is attached to the front panel portion 101 by mounting the pair of screw insertion portions 10 provided on the button plate 104.
The set screws 7, 7 are inserted through the corresponding 5, 5 105, and the set screws 7, 7 are inserted into the front panel section 101.
Pair of screw bosses 106, 10 formed on the back surface of the
It is carried out by screwing in corresponding to 6. These operation buttons 111 are capable of appearing and retracting with respect to the front surface portion of the front panel portion 101 via the through holes 114 formed in the front panel portion 101.

On the rear side of the operation buttons 111, a plurality of switch elements 10 mounted on the circuit board 103 are arranged so as to correspond to the respective operation buttons 111. These switch elements 10 are connected to the electronic circuit section. When the switch elements 10 are pressed, the electronic circuit section executes a predetermined operation according to the pressed switch elements 10. These switch elements 10 are pressed by the rear end of the operation button 111 when the operation button 111 is moved in a direction in which the front end 111a is pressed and the front surface of the front panel 101 is retracted. It is done like this.

As the circuit board 103, as shown in FIG. 6, a main board 103b and a control board 103 are provided.
Some of them are configured by being attached to a substantially flat board bracket, and some of them are entirely composed of one board as shown in FIGS. 7 and 8. Each of the switch elements 10 is attached to the front end portion of the circuit board 103 or the control board 103a supported on the front side of the main board 103b.

The circuit board 103 is supported by the outer casing. That is, as shown in FIG. 6, the board bracket has a pair of support arm portions 116, 116 formed so as to project from both sides of the front end side portion toward both sides. The board bracket includes the support arms 116,
A pair of setscrews 115, 115 are correspondingly inserted into the screw insertion holes 117, 117 formed in 116, and these setscrews 115, 115 are formed on the rear surface of the front panel 101 so as to project therefrom. The front panel portion 101 is screwed in corresponding to
Attached to.

Further, as shown in FIGS. 7 and 8, the circuit board 103 has a pair of ribs 108, 108 formed on the back surface of the front panel portion 101 so as to project therefrom, and a front portion of the rear housing portion 110. Some of them are supported by being sandwiched from the front and back by a pair of ribs 109, 109 formed to project toward the side. The ribs 108 and 109 are provided with support groove portions 112 and 113 into which the front edge side or the rear edge side of the circuit board 103 is fitted.

[0008]

In the electronic device as described above, the operation button 111 is attached to the front panel section 101 via the button plate 104, while the switch element 10 is an outer casing. Since it is mounted on the circuit board 103 supported inside the body, it is difficult to accurately position the relative position between the operation button 111 and the switch element 10 due to the influence of the dimensional error of the outer casing. Is. That is, the distance between the rear end portion of the operation button 111 indicated by the arrow T in FIG. 8 and the pressed element 10a of the switch element 10 varies due to the positional shift of the circuit board 103 in the outer housing. There is a risk of

Further, since the button plate 104 is fixed to the front panel portion 101 by the set screws 7, 7, there is a risk that the torque received by the set screws 7, 7 may cause distortion. Even with such distortion, the position of each operation button 111 with respect to the switch element 10 cannot be accurately maintained.

If the relative positioning between the operation button 111 and the switch element 10 is inaccurate, the operation button 11
It is impossible to operate the switch element 10 accurately by using 1.
That is, when the distance between the operation button 111 and the switch element 10 becomes larger than a predetermined distance, there is a fear that the switch button 10 cannot be pressed by the operation button 111. On the contrary, if the distance between the operation button 111 and the switch element 10 is smaller than a predetermined distance, the operation button 111 may be in a state of constantly pressing the switch element 10. .

Further, in this electronic device, the operation button 111 and the switch element 10 need to be individually attached, so that assembly is complicated. Particularly, in an electronic device in which the circuit board 103 has a board bracket as shown in FIG. 6, the front panel portion 101 of the button plate 104 is used.
Since a pair of setscrews 7 and 7 are used for mounting to the front panel portion 101 and a pair of setscrews 115 and 115 are used for mounting to the front panel portion 101 of the substrate bracket, a total of
A set screw for a book is required, and assembly is complicated.

Further, in the electronic device in which the circuit board 103 has a board bracket, the board bracket is formed as a dedicated product for the front panel portion 101 according to the shape of the front panel 101. It Therefore, in the electronic device having this configuration, when the electronic device is configured as a different type of electronic device in which the shape and configuration of the front panel unit 101 are different, the board bracket is common to the different types of electronic devices. Can not be used.

When the electronic device is configured as a television receiver, the operation button 111 is pressed by the C button.
If the switch element 10 is arranged below the image display portion of the RT (cathode ray tube), the switch element 10 is arranged at a position below the CRT. In this case, if dew condensation occurs on the CRT, water droplets may drip on the switch element 10 and disturb normal operation of the switch element 10.

Therefore, the present invention has been proposed in view of the above-mentioned circumstances, and enables accurate positioning between the operation button and the switch element, and facilitates the work of attaching the operation button and the switch element. It is also an object of the present invention to provide an electronic device capable of protecting the switch element from water droplets and the like.

[0015]

In order to solve the above problems and achieve the above objects, an electronic device according to the present invention is provided on the rear surface side of a front panel portion of an outer casing, and At least one operation button positioned on the switch board, the switch element provided on the switch board at the rear side of the operation button at a position corresponding to the operation button, and the switch board from the rear side. A board bracket fixed to the back surface of the front panel portion, the board bracket having a support portion formed to have a shape that can cover the switch board, and the board bracket being attached to the back surface portion of the front panel portion. By being fixed, the switch substrate is positioned and supported, and the switch substrate is covered in cooperation with the front panel portion.

Further, according to the present invention, in the above electronic device, the board bracket also supports an operation button.

[0017]

In the electronic device according to the present invention, the board bracket is fixed to the back surface of the front panel of the outer casing to position and support the switch board on which the switch element is mounted, and Since the switch board is covered in cooperation with the front panel section, the switch element is positioned with respect to at least one operation button which is disposed on the rear surface side of the front panel section and positioned with respect to the front panel section. At the same time, the switch element is protected from the outside air.

In the above electronic device, when the board bracket also supports the operation button, the board bracket positions the switch element with respect to the operation button more accurately.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below with reference to the drawings. This example is an example in which the electronic device according to the present invention is configured as a television receiver. This television receiver has an outer housing, and in this outer housing, an electronic circuit section including a plurality of circuit boards and various electronic elements mounted on these circuit boards and a CRT (cathode ray tube) are housed. Is configured.

The outer casing has an opening in the front wall, and the image display section of the CRT is exposed to the front side through the opening. As shown in FIGS. 1 to 3, the outer casing is provided on the lower side of the rear surface of the front panel 1 which is the front wall of the outer casing, that is, below the image display portion of the CRT. A plurality of operation buttons 11 are attached to the positioned portion from the back side. These operation buttons 11 are button plates 4 formed of a material such as synthetic resin in a substantially flat plate shape.
On the other hand, they are integrally connected. That is, the button plate 4 has a through hole in the central portion, and the operation buttons 11 are located in the through hole. The button plate 4 and the operation buttons 11 are connected to each other through a thin plate-shaped portion, and the operation buttons 11 can be flexibly displaced in the thickness direction of the button plate 4. ing.

The button plate 4 is positioned with respect to the front panel section 1. That is, a pair of penetrating bosses 1a are formed on the back surface of the front panel portion 1 so as to project rearward, and these penetrating bosses 1a are formed.
Is a pair of boss penetrating portions 4 provided on the button plate 4.
a and 4a are penetrated. These boss penetrations 4
Reference characters a and 4a are tongue-shaped members formed to project upward from the upper edge of the button plate 4, and each of the through bosses 1
It has a boss through hole through which a and 1a are inserted.

The front panel 1 is provided with a plurality of through holes 14 at positions corresponding to the respective operation buttons 11. Each of the operation buttons 11 has a front end side portion 11a protruding forward through the plurality of through holes 14. The operation buttons 11 can be retracted into the through holes 14 by pressing the front end side portion 11a.

A light guide tube 12 and an infrared filter 1 are provided between the button plate 4 and the front panel section 1.
3 are provided. The light guide tube 12 is a member made of a transparent material for guiding the light flux emitted from the light emitting element 8 arranged on the rear side of the button plate 4 to the front side as described later. The front panel 1 is provided with a through hole 15 for emitting a light beam at a position corresponding to the front side portion of the light guide tube 12. Further, the button plate 4 is provided with a through hole at a position corresponding to the rear side portion of the light guide tube 12. The infrared filter 13 is a member made of a red transparent material for guiding an infrared light flux to the light receiving element 9 arranged on the rear side of the button plate 4 as described later. Further, the front panel portion 1 is provided with a light flux entrance through hole 16 at a position corresponding to the front side portion of the infrared filter 13. Further, the button plate 4 has
A through hole is provided at a position corresponding to the rear side portion of the infrared filter 13.

A switch substrate 3 is arranged on the rear side of the button plate 4. On this switch board 3,
A plurality of switch elements 10 corresponding to the respective operation buttons 11
And the light emitting element 8 and the light receiving element 9 are attached. The switch board 3 is connected to an electronic circuit section (not shown) that constitutes the television apparatus. Each of the switch elements 10 selects the operation of the electronic circuit section,
It is for controlling. The light emitting element 8 is an LED
Etc., for displaying the operating state of the electronic circuit section according to the light emitting state. The light receiving element 9 is for receiving a remote control signal sent from the front side for remote control of the electronic circuit section. The remote control signal is transmitted by using an infrared light flux emitted from a remote control device (remote controller) as a carrier.

A board bracket 2 is disposed on the rear side of the switch board 3. The board bracket 2 is formed of a material such as synthetic resin so as to have a shape capable of covering the switch board 3 from the rear side, that is, a housing shape having an open front side. Further, in the board bracket 2, a plurality of ribs 2 for supporting the switch board 3 having slit-shaped groove portions into which the rear end side of the switch board 3 can be inserted are provided in the inner side portion.
a is provided.

A pair of boss fitting portions 2b, 2b are formed on the upper surface of the board bracket 2 so as to project therefrom. These boss fitting portions 2b, 2b are formed corresponding to the boss penetrating portions 4a, 4a of the button plate 4, and each have a boss fitting hole into which the penetrating boss 1a is fitted. Further, the board bracket 2 has a pair of support arm portions 5 and 5 projecting laterally on both side portions. The support arm portions 5 and 5 are provided with screw insertion holes 6 respectively. In this board bracket 2, the set screws 7, 7 are inserted into the respective screw insertion holes 6, 6 and the set screws 7, 7 are screwed into the front panel unit 1, whereby the front panel unit It is fixed to the back surface of the No. 1. A pair of screw bosses 17 and 17 each having a screw hole 18 into which the set screw 7 is screwed are provided on the rear surface of the front panel portion 1 so as to integrally project from the front panel portion 1. Thus, when the board bracket 2 is attached to the front panel portion 1, the through bosses 1a and 1a are fitted to the boss fitting portions 2b and 2b, respectively.

The board bracket 2 is fixed to the rear surface of the front panel portion 1 by the set screws 7, 7 so that the switch board 3 is attached to the ribs 2.
The switch substrate 3 is positioned and supported by a and covers the switch substrate 3 in cooperation with the front panel portion 1 and the button plate 4. Further, the board bracket 2 is fixed to the front panel portion 1 to support the button plate 4 positioned with respect to the front panel portion 1 by the through bosses 1a and 1a. That is, the button plate 4 is positioned with respect to the front panel portion 1 by penetrating the through bosses 1a, 1a into the boss through holes 4a, 4a, and the inner wall of the board bracket 2 at the outer peripheral edge of the button plate 4. This is done only in the direction of the main surface of the button plate 4 due to the contact with the section, and not in the direction away from the front panel section 1. The board bracket 2 supports the button plate 4 by sandwiching the button plate 4 in cooperation with the front panel portion 1.

Therefore, in this electronic device, the button plate 4 and the switch substrate 3 can be positioned and supported only by the work of fixing the substrate bracket 2 to the front panel portion 1, and the assembling is easy. Has been converted. Further, since the button plate 4 is sandwiched and supported by the board bracket 2 and the front panel portion 1, no distortion occurs and the operation buttons 11 can be accurately positioned at predetermined positions. it can.

When the board bracket 2 is fixed to the front panel portion 1 in this way, the rear end portion 11b of each operation button 11 and the pressed element 10a of the switch element 10 are separated from each other. , Are facing each other. At this time, the distance between the rear end portion 11b and the front end portion of the pressed element 10a indicated by the arrow T in FIG. 3 depends on the through bosses 1a and 1b of the button plate 4 and the board bracket 2. Since the button plate 4 and the switch board 3 are both positioned by the board bracket 2 while being positioned, the distance is accurately set to a predetermined distance. Therefore, in this electronic device, by pressing the front end portion 11a of the operation button 11 to the rear side, the pressed element 10a of the switch element 10 can always be favorably pressed through the rear end portion 11b. You can

Further, in this electronic device, since the substrate plate 3 is covered with the substrate bracket 2 and the front panel portion 1, it is protected from the outside air, and when dew condensation occurs on the CRT. Also in the above, there is no fear that water drops or the like will be dropped.

As shown in FIGS. 4 and 5, the electronic device according to the present invention is constructed by attaching a front plate 19 separate from the front panel section 1 to the front panel section 1. May be. The front plate 19 is provided on the front surface of the front panel section 1 with the C
It is formed as a substantially flat plate-like member having a size that can be attached to a position below the image display portion 23 of the RT. The front plate 19 has two pairs of support pieces 20, 20, 20, 20 at four corners of the back surface. The front plate 19 is fitted with the support pieces 20, 20, 20, 20 corresponding to the two pairs of support slits 21, 21, 21, 21 corresponding to the two pairs of the support slits 21, 21, 21, 21. It is attached to the front panel unit 1. Each of the support pieces 20 has a slit-shaped notch opened to the rear side, and hook-shaped protrusions on both sides of the tip side. When the support pieces 20 are fitted into the support slits, the protrusions come into contact with both side edges of the support slits 21 so that both side portions are elastically displaced in a direction in which the width of the cut portion is narrowed. When the protrusions reach the back side of the front panel unit 1, the initial state is restored, and the protrusions are engaged with the back face of the front panel unit 1.

The button plate 4 is arranged on the rear side of the front plate 19, that is, between the front plate 19 and the front panel section 1. At this time, the front end portion 11a of each operation button 11 is projected to the front side through the through hole 22 formed in the front plate 19 corresponding to each operation button 11. At this time, the button plate 4 is positioned with respect to the front panel section 1.

The switch board 3 is disposed on the rear side of the front panel section 1. This switch board 3
Are positioned and supported by the board bracket 2 fixed to the front panel section 1. The rear end portion 11b of each of the operation buttons 11 is provided with a through hole 14 provided in the front panel portion 1 and is provided with each of the switch elements 10 described above.
Facing the pressed element 10a.

Also in the electronic device configured as described above,
The rear end portion 11b of the operation button 11 and the switch element 10
The distance between the pressed member 10a and the front end portion of the pressed member 10a is accurately set to a predetermined distance. Therefore, in this electronic device, by pressing the front end portion 11a of the operation button 11 to the rear side, the pressed element 10a of the switch element 10 can always be favorably pressed through the rear end portion 11b. You can Further, also in this electronic device, the switch substrate 3 is covered with the substrate bracket 2 and the front panel portion 1 and thus protected from the outside air.

In the electronic device according to the present invention,
As described above, even when the front panel unit 1 is configured as a different type of electronic device having a different shape or configuration, the button plate 4, the switch substrate 3, and the substrate bracket 2 are provided between the different types of electronic devices. Can be used in common.

[0036]

As described above, in the electronic device according to the present invention, the board bracket is fixed to the back surface of the front panel portion of the outer casing to position the switch board to which the switch element is attached. And supports the switch substrate and covers the switch substrate in cooperation with the front panel portion.

Therefore, in this electronic device, the board bracket is provided with the switch element for at least one operation button provided on the rear surface side of the front panel section and positioned with respect to the front panel section. Can be positioned. Further, the board bracket can protect the switch element from the outside air.

In the above electronic device, when the board bracket also supports the operation button, the board bracket positions the switch element more accurately with respect to the operation button. You can

Further, in the electronic device according to the present invention, the switch board and the board bracket are the electronic devices of different models even when the electronic devices of different models have different shapes and configurations of the front panel. It can be used in common throughout.

That is, according to the present invention, precise positioning can be performed between the operation button and the switch element, the work of attaching the operation button and the switch element can be facilitated, and the switch element can be protected from water droplets or the like. The electronic device can be provided.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a main part of the electronic device according to the present invention, showing the structure of the main part as viewed from the front side.

FIG. 2 is an exploded perspective view of the main part of the electronic device, showing the structure of the main part as viewed from the rear side.

FIG. 3 is a vertical cross-sectional view of a main part showing the configuration of the main part of the electronic device.

FIG. 4 is a main part exploded perspective view showing another example of the structure of the main part of the electronic device according to the present invention.

5 is a longitudinal cross-sectional view of a main part showing the configuration of the main part of the electronic device shown in FIG.

FIG. 6 is an exploded perspective view showing a configuration of a conventional electronic device.

FIG. 7 is an exploded perspective view of essential parts showing another example of the configuration of the conventional electronic device.

8 is a longitudinal cross-sectional view of a main part showing the configuration of the conventional electronic device shown in FIG.

[Explanation of symbols]

 1 Outer Housing 1a Through Boss 2 Board Bracket 2b Boss Fitting Section 3 Switch Board 4 Button Plate 4a Boss Penetrating Section 10 Switch Element 11 Operation Button 19 Front Panel Section

Claims (2)

[Claims] 1. An at least one operation button disposed on the rear surface side of a front panel portion of an outer housing and positioned with respect to the front panel portion, and a rear portion of the operation button disposed on a switch board. A switch element disposed at a position corresponding to this operation button, and a support portion formed to have a shape capable of covering the switch substrate from the rear side and supporting the switch substrate. A board bracket fixed to the back surface of the front panel section is provided, and the board bracket is fixed to the back surface of the front panel section to position and support the switch board. An electronic device that cooperates with and covers the front panel portion. 2. The electronic device according to claim 1, wherein the board bracket also supports an operation button.