JP4075415B2 - Electronics - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electronic device in which an upper case and a lower case are combined to form a case body and a circuit board for a high-frequency electronic device is accommodated in the case body.
[0002]
[Prior art]
Conventionally, in the electronic devices as described above, it is necessary to prevent high frequency radio waves from leaking from the circuit board for high frequency electronic devices. However, in order to take such measures, a shield member is required, but it is also necessary to facilitate the assembly work of the electronic device.
[0003]
[Problems to be solved by the invention]
According to the present invention, an upper case and a lower case are combined to form a case body, and an electronic device in which a circuit board for a high-frequency electronic device is accommodated in the case body facilitates assembly work. This is the issue.
[0004]
[Means for Solving the Problems]
An electronic device according to a first aspect of the present invention is an electronic device in which a case body is configured by tying an upper case and a lower case, and a first shield member fixed to the upper case, and the first shield member A second shield member that is fixed to the lower case with the bottom face opposed to the second shield member, and is disposed on the second shield member so as to be sandwiched between the first shield member and the second shield member . A circuit board for high-frequency electronic equipment that is electrically connected to a circuit board provided outside the shield member of the upper case via at least a part of the circuit board for high-frequency electronic equipment The second shield member is fastened together with the lower case, and when the upper case and the lower case are assembled together, the first shield member and the second shield member are And Rudo member with wrap circuit board as a whole for opposing the high-frequency use electronic equipment, upon entirely envelops the circuit board for the high-frequency use electronic equipment, the connecting cables that are exposed in the vicinity of the connector The connector is electrically connected to a circuit board provided outside the shielding member of the upper case by being inserted and connected to the connector .
[0005]
According to the electronic device of claim 1 configured as described above, when the upper case and the lower case are assembled and assembled, the first shield member and the second shield member face each other and the high-frequency electronic device is used. Since the circuit board for use is almost entirely wrapped, it is possible to prevent radio wave leakage of high frequency radio waves. Furthermore, by simply tying the upper case and the lower case and assembling them, it is possible to obtain a structure for preventing radio wave leakage by the first shield member and the second shield member, and the assembling work is facilitated.
[0006]
The first shield member may be provided in the upper case, and the second shield member may be provided in the lower case.
[0007]
Moreover, it is good to provide a flange around each of the 1st shield member and the 2nd shield member, and to arrange | position so that this flange may approach and oppose. As a result, even if there is a gap between the first shield member and the second shield member, radio wave leakage can be prevented and the mutual positions of the first shield member and the second shield member can be prevented. A margin can be given to accuracy. Moreover, this flange can also be utilized as a fixing part to the boss or the like of the case.
[0008]
Further, an upper case mounting member that requires electrical supply such as a circuit board is mounted on the upper case side, and a lower case mounting member that requires electrical supply such as a circuit board is mounted on the lower case side, and the upper case When providing a connection member such as a connection cable for electrically connecting the attachment member and the lower case attachment member, an opening is provided in the vicinity of the connection member on the case side in at least one of the upper case and the lower case In addition, when an opening that can be opened and closed by a shield plate is provided in the shield member on the case side, and the connection member is held by a part of the shield member, the connection member is connected to the shield through the both openings. Since it can be connected to the case mounting member on the member side, it can be connected after the upper case and lower case are assembled, the cable length can be minimized, and the upper case and lower case can be connected. Work becomes easy assembly of. Further, when disassembling, since the connection member can be removed first through both openings, the separation work between the upper case and the lower case is facilitated, and the repair work and the like are facilitated.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 3 is a perspective view of a main part of the keyboard-type electronic musical instrument (electronic apparatus) according to the embodiment. FIG. 3 shows a state in which the electronic musical instrument is turned upside down, and the case body of the electronic musical instrument is constructed by tying an upper case 1 and a lower case 2 made of synthetic resin. A first opening 10 and a second opening 20 are formed on the bottom surface of the lower case 2, and the first opening 10 and the second opening 20 are aligned with each opening. Shaped lids 10A and 20A are respectively inserted. A shield member, which will be described later, is disposed in the upper case 1 and the lower case 2, but a thin film for shielding the openings of the shield members corresponding to the openings 10 and 20 on the back surfaces of the lids 10A and 20A. Shield plates 10A-1 and 20A-1 such as iron plates or aluminum plates are respectively attached. In the lower case 2, on the front side of the openings 10 and 20 (the performer side, the same applies hereinafter), a fixing portion of the keyboard device exposed on the panel surface side not shown in the drawing of the upper case 1 is provided. An inner part 30 is formed.
[0010]
FIG. 1 is a cross-sectional view showing a state where the upper case 1 and the lower case 2 are separated together with a schematic structure thereof, and FIG. 2 is a cross-sectional view showing an assembled state of the upper case 1 and the lower case 2 together with the schematic structure thereof. 1 and 2 correspond to the AA arrow cross section of FIG. 3 and show the vicinity of the first opening 10. 4 is a cross-sectional view taken along the line BB in FIG. 1 and 2, the front side (left side in the figure) of the electronic musical instrument is not shown.
[0011]
Inside the upper case 1, an upper circuit board (upper case mounting member) 11 for performing signal processing of an operation switch and a display device (not shown) arranged on the panel surface 1A is screwed to the bosses 1a and 1a. A first shield member 12 is disposed on the inner side (lower case 2 side) of the upper circuit board 11 inside the upper case 1. A connection cable (connection member) 13 made of a flexible flat cable is connected to the terminal 11a on the upper circuit board 11, and a contact member is exposed at the other end of the connection cable 13 by exposing a conductive member. A portion 13a is formed. The connection cable 13 is held by a band 121a on a standing piece 121 formed on the shield member 12 in the vicinity of the contact terminal portion 13a.
[0012]
Inside the lower case 2 are disposed a lower circuit board (circuit board or lower case mounting member) 21 constituting a main control circuit, a sound source circuit, an input / output circuit, and the like, and a second shield member 22. . A connector (connecting member) 21 a for inserting and connecting the connection cable 13 is attached to the lower circuit board 21 for electrical connection with the upper circuit board 11.
[0013]
Each shield member 12, 22 is formed by pressing a thin iron plate or aluminum plate, and each has a box shape including a substantially rectangular parallelepiped space having a rectangular bottom surface and four side surfaces surrounding the bottom surface. Yes. The opposing bottom surfaces of the shield members 12 and 22 are substantially the same. In addition, flanges 12a and 22a are provided around the ends of the four side surfaces so as to extend to the outer periphery at substantially right angles to the side surfaces. The lower case 2 has a housing portion 2A having substantially the same shape as the shield member 22 on the rear side (opposite to the performer) from the back portion 30 for fixing the keyboard device. It is fitted in the portion 2A. The shield member 22 is fixed to the lower case 2 with screws 6 and 6 at the flange 22a. Further, one end of the lower circuit board 21 is fastened together with a screw 6 at a flange 22 a of the shield member 22. Further, a claw 22b (FIGS. 1 and 2) is extended from the shield member 22 on the lower case 2 side by cutting and raising on the side opposite to the flange 22a (inner side). Although not shown in the drawing, a plurality of claws 22b are formed, and the other end of the lower circuit board 21 is fixed to the shield member 22 by screws 7 in the claws 22b.
[0014]
The shield member 12 on the upper case 1 side is screwed with screws 8 and 8 at the ends of the flange 12a and the long bosses 1b and 1b of the upper case 1 so that the upper case 1 and the lower case 2 are assembled. In this case, the shield member 12 of the upper case 1 and the shield member 22 of the lower case 2 are disposed to face each other with the flanges 12a and 22a approaching each other. As a result, the shield members 12 and 22 face each other and substantially wrap around the lower circuit board 21. Although a gap of about 2 to 3 mm is provided between the flanges 12a and 22a, the portions of the flanges 12a and 22a facing the screws 6 and 8 do not interfere with the heads of these screws 6 and 8. Notches are appropriately provided in the.
[0015]
In the shield member 22 on the lower case 2 side, an opening 22 a is formed at a position corresponding to the opening 10. 1 and 2, the cross sections of the shield members 12 and 22 are indicated by thick solid lines, and the openings 22a in the cross sections are indicated by thick dashed lines. The opening 22a of the shield member 22 and the opening 10 of the lower case 2 are closed by the lid 10A shown in FIG. 3, but by removing the lid 10A, the bottom 10 of the lower case 2 is opened via the openings 10 and 22a. A hand can be inserted into the lower circuit board 21 side. As shown in FIG. 4, a step 10a that receives the periphery of the lid 10A is formed at the periphery of the opening 10, and the lid 10A is screwed to the lower case 2 at the position of the step 10a. .
[0016]
FIG. 5 is a perspective view showing the vicinity of the standing piece 121 of the shield member 12. The standing piece 121 of the shield member 12 is formed in a state in which a part of the flange 12a is cut and raised, and the shield member 22 on the lower case 2 side is raised by cutting and raising the flange 22a and the side surface portion. A notch 221 in which the installation piece 121 is accommodated is formed. Accordingly, as shown by the one-dot chain line in FIG. 5, when the shield members 12 and 22 are opposed (assembled), a gap S is formed on a part of the flange 22 a of the shield member 22 on the outside of the standing piece 121. Is formed. The connection cable 13 and the contact terminal portion 13a held by the standing piece 121 are arranged in the gap S, and a part of the connection cable 13 and the contact terminal portion 13a are located near the connector 21a in the lower circuit board 21. Exposed to the side.
[0017]
The band 121 a that fixes the connection cable 13 to the standing piece 121 is a fastening band that is not used for reversing after fastening, for example, used to bundle cables of electrical appliances, and the connection cable 13 is connected to the standing piece 121. On the other hand, it is fastened with an appropriate force. Further, as shown in FIGS. 1 and 4, the connection cable 13 is arranged to be loosened to some extent on the upper case 1 side. Therefore, by pulling the connection cable 13, the connection cable 13 can be pulled out from the standing piece 121 to the lower circuit board 21 side, and the contact terminal portion 13a can be inserted and connected to the connector 21a.
[0018]
FIG. 6 is a perspective view showing the vicinity of the second opening 20 as seen from the lower case 2 side. In the second opening 20, an upper circuit board 11 ′ attached to the upper case 1 and A lower circuit board 21 ′ attached to the lower case 2 is provided. A connection cable 13 'is connected to the upper circuit board 11', and a female connector 13a 'is attached to the other end of the connection cable 13'. Further, a holder 111 made of an elastic member such as rubber or plastic is attached to the upper circuit board 11 ′, and the connection cable 13 ′ is held between the holders 111. Further, a male connector 21a ′ for fitting and connecting the female connector 13a ′ of the connection cable 13 ′ is attached to the lower circuit board 21 ′ for electrical connection with the upper circuit board 11 ′. The shield members 12 and 22 are also disposed inside the opening 20, and the upper circuit board 11 ′ and the lower circuit board 21 ′ are accommodated in the shield members 12 and 22.
[0019]
As described above, the connection cable 13 'held by the holder 111 has its female connector 13a' exposed to the lower circuit board 21 'side in the vicinity of the second opening 20 and the male connector 21a'. This female connector 13a 'can be fitted and connected to the male connector 21a' of the lower circuit board 21 '. The holder 111 holds the connection cable 13 ′ with an appropriate force, and the pulling length of the connection cable 13 ′ can be adjusted as appropriate to facilitate connection by pulling the connection cable 13 ′.
[0020]
As described above, the electronic musical instrument according to this embodiment corresponds to claim 1, and the electronic instrument in which the upper case 1 and the lower case 2 are combined to form a case body corresponds to the first case fixed to the upper case 1. A first shield member 12, a second shield member 22 having substantially the same shape as the first shield member 12, facing the first shield member 12 and fixed to the lower case 2, and the first shield member 12 and a lower circuit board 21 (circuit board) for high frequency electronic equipment disposed on the first shield member 12 so as to be sandwiched between the second shield member 22 and the upper case 1 and the lower case. When assembled by tying the case 2, the first shield member 12 and the second shield member 22 are opposed to each other and substantially wrap around the lower circuit board 21.
[0021]
With the above configuration, when assembling the electronic musical instrument, the upper case 1 side and the lower case 2 side are assembled, the upper case 1 side is turned over and placed on a work table or the like, and the lower case 2 side is covered thereon. . The lids 10A and 20A of the lower case 2 are in a removed state. Next, a hand is put into the opening 10 of the lower case 2 or inside the case, the connection cable 13 held by the standing piece 121 is pulled out, and the contact terminal portion 13a is inserted and connected to the connector 21a of the lower circuit board 21. To do. Further, a hand is put into the case through the opening 20, and the female connector 13a 'of the connection cable 13' is fitted and connected to the male connector 21a 'of the lower circuit board 21'. Then, the lid 10A is fitted into the first opening 10 and screwed, the lid 20A is fitted into the second opening 20 and screwed, and the lower case 2 is screwed to the upper case 1. Therefore, the lower case 2 can be placed on the upper case 1 without worrying about the presence of the connection cables 13 and 13 'when the lower case 2 is moved, so that the assembling work becomes extremely easy. Further, when disassembling, the electronic musical instrument is placed on a work table with the inside upside down, the lids 10A and 20A are removed from the lower case 2, the connection cables 13 and 13 'are removed, and then the lower case 2 is removed from the upper case 1. Since it can be removed, the disassembling work becomes very easy.
[0022]
The lower circuit board 11, the lower circuit board 11 ′, and the upper circuit board 21 ′ are circuit boards for high-frequency electronic devices equipped with a microcomputer or the like. These circuit boards are included in the shield members 12 and 22. Therefore, high frequency radio wave leakage from these circuit boards can be prevented. Although there is a gap between the flanges 12a and 22a of the shield members 12 and 22, since the flanges 12a and 22a have a certain width, leakage of high-frequency radio waves with little diffraction hardly occurs. Further, the shield members 12 and 22 can be separately attached to the upper case 1 and the lower case 2, respectively, and at the same time when the upper case 1 and the lower case 2 are assembled, the shield members 12 and 22 attach the substrate. Since it can be wrapped, assembly work becomes easy.
[0023]
In the above embodiment, the connection cable 13 in the vicinity of the first opening 10 is the case of the contact terminal portion 13a whose tip is exposed from the conductive member, but it goes without saying that the connector may be attached. Nor. Further, the connection cables 13 and 13 'as the connection members may have any form such as a flat cable, a linear cable, or other cables.
[0024]
Further, the connection cable 13 is held by the band 121a with respect to the standing piece 121. For example, as shown in FIG. 7A, a standing piece 121 ′ having a horizontal C-shape (vertically long) is used. You may make it hold | maintain this connection cable 13 by arrange | positioning so that the standing piece 13 may be inserted in back part 121a 'using the elasticity of the width direction of the connection cable 13 (flat cable). Further, when a linear connection cable 13 ″ is used as shown in FIG. 7B, a horizontal section C-shaped one is used as the standing piece 121 ″, and the connection cable 13 ″ is placed in the groove. It may be inserted and held, and a U-shaped cross section may be used as well.
[0025]
In the embodiment, the circuit board for the high-frequency electronic device is described as being disposed in the lower case, but may be disposed on the upper case side.
[0026]
Further, in the embodiment, the upper circuit board as an upper case mounting member that requires electrical supply mounted on the upper case, and the lower circuit board as a lower case mounting member that requires electrical supply mounted on the lower case, Although the respective applied examples have been described, the upper case mounting member and the lower case mounting member may be other built-in electric devices such as a hard disk device and a CD-R device. That is, it goes without saying that the present invention can also be applied to a structure in which these device devices and a circuit board are connected.
[0027]
In the embodiments, the electronic keyboard musical instrument has been described as an example, but it goes without saying that the present invention can be applied to other various electronic devices.
[0028]
【The invention's effect】
According to the electronic device of claim 1, when the upper case and the lower case are assembled and assembled, the first shield member and the second shield member face each other so that the circuit board for the high-frequency electronic device is almost entirely Therefore, it is possible to prevent radio wave leakage of high-frequency radio waves. Furthermore, the structure of countermeasures against radio wave leakage by the first shield member and the second shield member can be achieved by simply assembling the upper case and the lower case together. This makes assembly work easier.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a state in which an upper case and a lower case are separated in a keyboard-type electronic musical instrument according to an embodiment of the present invention, together with a schematic structure thereof.
FIG. 2 is a cross-sectional view showing an assembled state of an upper case and a lower case in the keyboard-type electronic musical instrument according to the embodiment of the present invention together with a schematic structure thereof.
FIG. 3 is a perspective view of a main part of the keyboard-type electronic musical instrument according to the embodiment of the present invention.
4 is a cross-sectional view taken along the line BB in FIG. 3;
FIG. 5 is a perspective view showing the vicinity of a standing piece of a shield member in an embodiment of the present invention.
FIG. 6 is a perspective view showing the vicinity of a second opening viewed from the lower case side in the embodiment of the present invention.
FIG. 7 is a diagram illustrating another example of the standing piece in the embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Upper case, 2 ... Lower case, 12 ... 1st shield member, 12a ... Flange, 21,21 '... Lower circuit board (circuit board), 22 ... 2nd shield member, 22a ... Flange

Claims (1)

In an electronic device in which a case body is configured by tying an upper case and a lower case,
A first shield member fixed to the upper case;
A second shield member fixed to the lower case with a bottom surface facing the first shield member;
Wherein the first shield member and arranged on said second shield member so as to be held between the second shield member, electrically connected to a circuit board provided in the shield member outside of the upper case via the connector a circuit board for high-frequency use electronic equipment,
Consists of
When at least a part of the circuit board for the high frequency electronic device is fastened together with the second shield member together with the second shield member via a screw, and the upper case and the lower case are assembled and assembled The first shield member and the second shield member face each other and entirely enclose the circuit board for the high-frequency electronic device ,
The circuit board provided outside the shield member of the upper case by inserting and connecting the connection cable exposed in the vicinity of the connector when wrapping the circuit board for the high-frequency electronic device as a whole An electronic device characterized in that it is electrically connected .

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