JP3777921B2 - Electronics - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electronic device such as a mobile phone, a portable information terminal, an electronic notebook, and the like.
[0002]
[Prior art]
In general, an electronic device such as a mobile phone has a control board with a control circuit configured to perform a predetermined function built in a housing. In recent years, electronic devices are required to have multiple functions. For this reason, it is required to form a complicated circuit on a control board and to provide many electronic components.
[0003]
However, since electronic devices such as mobile phones can be easily carried, that is, portability is required, there is a limit to mounting a complicated control circuit requiring many electronic components only on the control board.
[0004]
[Problems to be solved by the invention]
The present invention has been made in view of the above problems, and an object of the present invention is to provide an electronic device capable of maintaining the overall shape small or thin even when a built-in control circuit becomes complicated. .
[0005]
[Means for Solving the Problems]
(1) In order to achieve the above object, an electronic device according to the present invention is an electronic device having a control board and a housing that accommodates the control board, around an inner surface of a case constituting the housing. Is provided with a stepped portion, and the control board is positioned by placing a side edge portion on the stepped portion. The control board includes a board-side electronic component, a wiring, and a case-side part. A terminal portion formed on a surface and connected to the wiring is provided, and the case is provided with a housing-side electronic component and a wiring, and the wiring passes through the stepped portion to become a terminal portion, and the control The terminal part of the board and the terminal part of the case are each configured by arranging a plurality of terminals, and the side edges of the control board are placed on the stepped parts so that the terminals come into contact with each other. A conductive connection is provided.
[0006]
According to the electronic apparatus having the above configuration, when the control board is mounted on the stepped portion of the casing, both terminal portions are automatically conductively connected, whereby a control circuit having a predetermined function is connected to the control board and the casing. It is comprised by both. In this manner, a part of the control circuit is configured using the housing itself, and it is not necessary to use a large number of control boards, so that the size of the electronic device can be made small or thin.
[0007]
In addition, the control board and the housing are not conductively connected by a dedicated conductive connection process, for example, a conductive connection process using a cable, but the conductive connection is automatically made when the control board is mounted on the step of the casing. As it is achieved, the work is very simple.
[0008]
(2) In the electronic device according to the above (1), the control board can be provided with a board-side electronic component, and the housing can be provided with a housing-side electronic component. The total height of the casing-side electronic components can be greater than the height of the internal space between the casing and the control board mounted in the casing, and the board-side electronic components And the case-side electronic component may be formed in a direction facing each other when the control board is mounted on the case, but in a position not overlapping each other.
[0009]
According to this configuration, an electronic component having a relatively high height can be efficiently stored in a narrow internal space formed between the control board and the housing, thereby reducing the size or thickness of the electronic device. Can be achieved.
[0010]
(3) In the electronic device according to (2), the board-side electronic component and the housing-side electronic component can be capacitors or coils. In general, capacitors and coils are relatively high parts. According to the configuration described in the above item (2), these capacitors and coils can be efficiently stored in a narrow internal space.
[0011]
(4) In one of the electronic devices according to (1) to (3), the electronic device is portable, and the wiring of the control board and the wiring of the housing cooperate to make a telephone. A control circuit for realizing the function can be configured, and an input element and a liquid crystal display device can be provided in the housing. According to this configuration, a mobile phone can be configured as an electronic device, and this mobile phone can be formed in a small or thin overall shape even when a complicated control circuit is incorporated.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an electronic apparatus according to the present invention will be described using a mobile phone as an example. FIG. 1 shows an embodiment of the mobile phone. The cellular phone 1 includes a front case 2 and a back case 3 that cooperate to form a casing, and a control board 4 provided between the cases 2 and 3.
[0013]
The front case 2 includes switch operation units 6, display windows 7, and antennas 8 arranged in a matrix as input elements. The control board 4 is formed in a shape smaller than the front case 2 and the back case 3, and a switching element 9 is provided in a portion facing the switch operation unit 6 in a surface facing the front case 2 (hereinafter referred to as a surface). Provided. These switching elements 9 perform a switching operation, that is, a switching operation from ON to OFF or from OFF to ON when the switch operation unit 6 at the corresponding position is pressed. In addition, a speaker 11 is provided at the front end portion of the surface of the control board 4.
[0014]
On the surface facing the back case 3 of the control board 4 (hereinafter referred to as the back surface), an electronic device constituting a control circuit 12 (a circuit arrangement area is indicated by a dotted line in FIG. 1) for controlling the overall telephone function. Components and wiring connected to them are provided. In addition, coils 13a and 13b are mounted on the back surface of the control board 4 as electronic parts necessary for configuring the control circuit 12, as shown in FIG. Reference numerals 20 a and 20 b denote wirings connected to the control circuit 12.
[0015]
In FIG. 1, terminal portions 15 a, 15 b, 15 c, and 15 d are formed on the back surface of the side portion of the control board 4, and the surface of the control board 4 or between these terminal portions 15 a to 15 d and the control circuit 12 is formed. They are connected by wiring formed on the back surface. Further, a terminal 14 connected to the control circuit 12 is formed at an appropriate position on the back surface of the control circuit 12 on the surface of the control board 4, and the terminal 14 is connected to the liquid crystal display device 17 via a rubber connector 16 as an elastic connector. Are electrically conductively connected to the terminal portion.
[0016]
For example, as shown in FIG. 3, the rubber connector 16 is provided with an elastic base 18 formed in a rectangular parallelepiped shape by an elastic material having electrical insulation, for example, silicon rubber, and the elastic base 18 is provided in parallel to each other. A large number of conductive portions 19. Both the upper and lower ends of these conductive portions 19 are exposed to the outside of the elastic base portion 18, and a gap between two adjacent conductive portions 19 is a nonconductive portion having a spacing W due to an elastic material.
[0017]
In FIG. 1, the terminal 14 and the terminal on the side of the liquid crystal display device 17 facing the terminal 14 are individually conductively connected by a conductive portion 19 in the rubber connector 16. At this time, due to the elastic force of the elastic base portion 18 of the rubber connector 16, terminals between the conductive portion 19 and the terminal 14 of the rubber connector 16 and between the conductive portion 19 and the terminal on the liquid crystal display device 17 face each other. Secured between each other.
[0018]
As shown in FIG. 4, the liquid crystal display device 17 includes a liquid crystal panel 21 and a backlight 22. The liquid crystal panel 21 has a pair of substrates 24a and 24b whose periphery is bonded by a sealing material 23, and a liquid crystal 26 is sealed in a gap formed between the substrates. The substrate materials 25a and 25b constituting the substrates 24a and 24b are formed of a transparent material such as glass or a flexible transparent material such as plastic.
[0019]
In the first substrate 24a, a first electrode 27a is formed of ITO (Indium Tin Oxide) or the like on the liquid crystal side surface of the substrate material 25a, an overcoat layer 28a is formed thereon, and an alignment film 29a is further formed thereon. It is formed. Further, a polarizing plate 31a as an optical element is attached to the outer surface of the substrate material 25a, for example, by sticking.
[0020]
In the second substrate 24b, a second electrode 27b is formed of ITO (Indium Tin Oxide) or the like on the liquid crystal side surface of the substrate material 25b, an overcoat layer 28b is formed thereon, and an alignment film 29b is further formed thereon. It is formed. Further, a polarizing plate 31b as an optical element is attached to the outer surface of the substrate material 25b by, for example, sticking. A retardation plate is disposed between the substrate material 25b and the polarizing plate 31b as necessary.
[0021]
The first substrate 24 a has a substrate overhanging portion 24 c that projects outside the second substrate 24 b and outside the sealing material 23. The first electrode 27a on the first substrate 24c extends directly to the substrate overhanging portion 24c to form a wiring 32. The second electrode 27b on the second substrate 24b is connected to the wiring 32 on the substrate overhanging portion 24c through the conductive material 33 dispersed in the seal material 23.
[0022]
External connection terminals 34 for transmitting and receiving signals and power to and from the control circuit 12 formed on the back surface of the control board 4 are formed at the side edges of the board extension 24c. The wiring 32 and the external connection terminal 34 on the substrate extension 24c are conductively connected to the terminals of the liquid crystal driving IC 36, that is, the bumps 37 by an ACF (Anisotropic Conductive Film). This liquid crystal driving IC 36 not only drives each first electrode 27a formed on the substrate 24a, but also is connected to each second electrode 27b formed on the opposing substrate 24b via the conductive material 33. And act as a scan electrode drive circuit and a signal electrode drive circuit. One of the electrodes 27a and 27b is a scanning electrode and the other is a signal electrode.
[0023]
The backlight 22 includes, for example, a light guide 38 formed of plastic and an LED 39 as a light source. The light guide 38 has a recess 41, and the liquid crystal panel 21 is accommodated in the recess 41. A hole 42 is formed in a portion of the light guide 38 corresponding to the side edge of the substrate extension 24 c of the liquid crystal panel 21, and the rubber connector 16 is inserted into the hole 42. Note that a reflection member that reflects the light of the LED 39 inward is preferably attached to the outer surface of the light guide plate 38.
[0024]
The backlight 22 including the liquid crystal panel 21 and the rubber connector 16 is mounted on the control board 4 so that the rubber connector 16 contacts the terminals 14. The terminal 14 and the external connection terminal 34 on the liquid crystal panel 21 side are conductively connected. As a result, the control circuit 12 on the control board 4 side and the liquid crystal driving IC 36 of the liquid crystal panel 21 are electrically connected.
[0025]
With respect to the liquid crystal display device 17 formed as described above, the light emitted from the LED 39 is guided by the light guide 38 and emitted to the outside with a uniform intensity from the light emitting surface 38a to illuminate almost the entire surface of the liquid crystal panel 21 uniformly. To do. Then, the scanning voltage is sequentially applied to the scanning electrode of either the first electrode 27a or the second electrode 27b by the liquid crystal driving IC 36 in a linear pattern, and further, the display is performed on the other signal electrode of these electrodes. By simultaneously applying a data voltage based on an image to each linear pattern, the light passing through each pixel portion selected by the application of both voltages is modulated, so that letters, numbers, An image such as a figure is displayed. In the present embodiment, in FIG. 1, the image displayed from the liquid crystal display device 17 can be visually confirmed through the display window 7 provided in the front case 2.
[0026]
In FIG. 1, a step 47 is provided around the inner surface of the back case 3, and as shown in FIG. 2, the control board 4 is mounted on the back case 3 with its side edges supported by the step 47. It is mounted and positioned so that its position does not move. Further, in FIG. 1, electrolytic capacitors 43a, 43b, 43c as electronic components and an IC chip 44 as electronic components are provided on the inner surface of the back case 3, and a set of a plurality of lines is provided between these electronic components. Wiring 46 which is a body is provided. A portion passing through the step portion 47 of these wirings 46 is a terminal portion 46a. Reference numeral 48 denotes a microphone.
[0027]
When assembling the mobile phone 1 according to the present embodiment, the control board 4 is placed on the stepped portion 47 of the back case 3, that is, mounted and positioned, and the liquid crystal display device 17 and the speaker 11 are mounted on the control board 4. To do. Then, the guide pins 49 formed at the end of the front case 2 are sequentially inserted into the guide holes 51 formed at the end of the control board 4 and the guide holes 52 formed at the end of the back case 3, so that the front case 2 is assembled to the back case 3, and these cases are fixed with appropriate fasteners such as screws.
[0028]
When the assembly of the mobile phone 1 is completed as described above, the side edge of the control board 4 is placed on the stepped portion 47 of the back case 3 as shown in FIG. The portion 15a and the terminal portion 46a on the back case 3 side automatically come into contact with each other to achieve conductive connection therebetween. Such conductive connection is similarly achieved between the other terminal portions in FIG. 1, that is, between the terminal portions 15b, 15c and 15d on the control board 4 side and the terminal portion 46a on the back case 3 side. . The terminal part on the control board 4 side and the terminal part of the back case, which are connected to face each other, have a structure in which a plurality of terminals are arranged, and the terminals are in contact with each other. Of course, only one terminal may be arranged in the terminal portion.
[0029]
Due to the wiring connection structure between the control board 4 and the back case 3 as described above, the electronic components provided in the back case 3, that is, the IC chip 44 and the electrolytic capacitors 43a, 43b, 43c are formed on the back surface of the control board 4. It becomes possible to function as an electronic component constituting the control circuit 12.
[0030]
As described above, in the cellular phone 1 according to the present embodiment, when the control board 4 is mounted on the stepped portion 47 of the back case 3 as a casing, the terminal parts 15a, 15b, 15c, and 15d on the control board 4 side are A control circuit for performing a predetermined telephone function is configured by the cooperation of the control board 4 and the back case 3 by being automatically conductively connected to the terminal portion 46a on the back case 3 side. That is, since a part of the control circuit is configured using the back case 3 itself, it is not necessary to use a large number of control boards 4, and as a result, the size of the mobile phone 1 can be made small or thin. it can.
[0031]
In addition, the control board 4 and the back case 3 are not electrically connected by a dedicated conductive connection process, for example, a conductive connection process using a cable, but automatically when the control board 4 is mounted on the step 47 of the back case 3. Since a conductive connection is achieved, the operation is very simple.
[0032]
Further, in the present embodiment, as shown in FIG. 2, the coils 13a and 13b, which are electronic components provided on the control board 4 side, and the electrolytic capacitor 43a, which is an electronic component provided on the back case 3, face each other. However, they are provided alternately at positions that do not overlap each other.
[0033]
In general, the electrolytic capacitor 43a and the coils 13a and 13b are relatively high in height, and the total size of both may be thicker than the height H of the internal space formed by the control board 4 and the back case 3. is there. Therefore, if these electronic components are provided at the same position where they overlap each other, the height H of the internal space must be made very large, which is a factor that increases the height of the mobile phone 1. Become.
[0034]
On the other hand, when the coils 13a and 13b and the electrolytic capacitor 43a are provided in a direction facing each other but at a staggered position so as not to overlap each other as in the present embodiment, the electrolytic capacitor 43a and the coils 13a and 13b are used. A relatively high electronic component can be efficiently stored in a narrow internal space, and as a result, the mobile phone 1 can be formed thin.
[0035]
(Other embodiments)
The present invention has been described with reference to the preferred embodiments. However, the present invention is not limited to the embodiments, and various modifications can be made within the scope of the invention described in the claims.
[0036]
For example, in the above embodiment, a mobile phone is exemplified as the electronic device. However, the present invention is naturally applicable to other electronic devices such as a portable information terminal and an electronic notebook.
[0037]
【The invention's effect】
According to the electronic device of the present invention, when the control board is mounted on the stepped portion of the casing, both terminal portions are automatically conductively connected, whereby a control circuit having a predetermined function is connected to the control board and the casing. Constructed by cooperation of the body. In this manner, a part of the control circuit is configured using the housing itself, and it is not necessary to use a large number of control boards, so that the size of the electronic device can be made small or thin.
[0038]
In addition, the control board and the housing are not conductively connected by a dedicated conductive connection process, for example, a conductive connection process using a cable, but the conductive connection is automatically made when the control board is mounted on the step of the casing. As it is achieved, the work is very simple.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an electronic device according to an embodiment of the present invention in an exploded state.
FIG. 2 is a cross-sectional view showing a cross-sectional structure according to the line II-II in FIG.
3 is a perspective view showing an example of a rubber connector that is one of the parts used in the electronic apparatus of FIG. 1. FIG.
4 is a cross-sectional view illustrating an example of a liquid crystal display device that is one of the components used in the electronic apparatus of FIG. 1;
[Explanation of symbols]
1 Mobile phone (electronic equipment)
2 Front case (housing)
3 Back case (housing)
4 Control board 6 Switch operation part (element for input)
12 Control circuit (wiring)
13a, 13b Coils (electronic parts)
15a, 15b, 15c, 15d Terminal 17 Liquid crystal display device 20a, 20b Wiring 43a, 43b, 43c Electrolytic capacitor (electronic component)
44 IC chip (electronic component)
46 Wiring 46a Terminal part 47 Step part H Height of internal space

Claims (4)

In an electronic device having a control board and a housing for housing the control board,
A step portion is provided around the inner surface of the case constituting the housing, and the control board is positioned by placing its side end portion on the step portion,
The control board is provided with board-side electronic components, wiring, and terminal portions formed on the case-side surface and connected to the wiring.
The case is provided with a housing-side electronic component and wiring, and the wiring passes through the stepped portion to become a terminal portion.
The terminal part of the control board and the terminal part of the case each have a structure in which a plurality of terminals are arranged, and the terminals come into contact with each other by placing the side edge part of the control board on the stepped part. An electronic device characterized by being electrically conductively connected. The total height of the board-side electronic component and the housing-side electronic component is greater than the height of the internal space between the case and the control board mounted in the case,
The said board | substrate side electronic component and the said housing | casing side electronic component are formed in the direction which mutually faces when the said control board is mounted in the said case, but the position which does not mutually overlap. Electronics.   The electronic apparatus according to claim 1, wherein the board-side electronic component and the housing-side electronic component are capacitors or coils. The electronic device according to claim 1, wherein the electronic device is portable.
The control board wiring and the case wiring cooperate to form a control circuit for realizing a telephone function, and the casing is provided with an input element and a liquid crystal display device .

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