KR940001685B1 - Electronic apparatus - Google Patents

Abstract

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Description

Electronics

1 to 4 show a portable computer according to an embodiment of the present invention,

1 is a perspective view of the computer in a state where the display unit is opened.

2 is a perspective view of the computer in a closed state of the display unit.

3 is a side cross-sectional view of the computer.

4 is an exploded perspective view showing the front of the computer.

* Explanation of symbols for main parts of the drawings

1: Computer 3: Base Unit

5: display unit 7: keyboard unit

9: expansion box 11: lower case

13: top cover 15: socket

17: handle 19: guide duct

21, 23, 57: Slit 33: Base frame

35: display cover 37: leg portion

39: latch click 43: keyboard body

45: keyboard frame 55: dial key

63: PCB 65: mounting surface

73, 75, 78: SIMM socket 74: first area

76: second area 77, 93: connector

83: shield plate 87: keyboard base

91: flat cable 95: reinforcement plate

97: cooling fan

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to electronic devices, particularly electronic devices in which a plurality of electronic components are mounted in a box body having an inclined surface.

In a general electronic device, when a large number of components such as a memory element are mounted on a substrate disposed in an upper body, components of the same dimension are mounted in the same direction. For example, when a single in-line memory module of the same size (hereinafter referred to as SIMM) is densely mounted on a substrate through a plurality of sockets, all SIMMs are mounted perpendicular to the substrate surface.

The conventional component mounting method described above has no problem when the box body of the electronic device housing the component is a rectangular parallelepiped.

However, in the case of a portable computer called a laptop computer, which is widely used in recent years, the upper surface of the box is inclined at a predetermined angle with respect to the mounting surface on the bottom wall on which the substrate is attached to incline the keyboard at a predetermined angle with respect to the bottom wall. There is itself. In such a box, when attempting to mount a plurality of SIMMs of the same dimension in the vertical direction with respect to the substrate surface in a space between the inclined surface and the substrate, some SIMMs touch the inclined surface, so that only a part of the substrate The problem arises that the SIMM cannot be mounted. SIMMs that cannot be mounted in the vertical direction can be mounted horizontally with respect to the substrate surface like other flat package elements, but in this case, each SIMM requires a large mounting area and the mounting density is greatly reduced. There is a problem.

The present invention has been made in view of the above problems, and an object thereof is to provide an electronic device capable of mounting a tall component on a substrate without reducing the mounting density.

In order to achieve the above object, the electronic device of the present invention is a box body having a mounting surface and an inclined surface which faces the mounting surface and is inclined at a predetermined angle with respect to the mounting surface, and a circuit attached on the mounting surface substantially parallel thereto. A substrate is provided. The circuit board has a first region having a long distance to the inclined surface, and a second region having a shorter distance to the inclined surface than the distance between the first region and the inclined surface. In the first region, a plurality of first electronic components are provided substantially perpendicular to the circuit board, and in the second region, the second electronic components are inclined with respect to the circuit board in the same direction as the inclined plane. .

According to the electronic device of the above structure, since the upright electronic component is mounted in the horizontal direction with high density in the first region of the substrate, and the electronic component is mounted obliquely in the second region, the electronic component is efficiently mounted without obstructing the inclined surface. It is mounted.

Hereinafter, a portable computer according to an embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1 and FIG. 2, the computer 1 includes a base unit 3 and a display unit 5 as a box, and a keyboard unit 7 is provided on an upper surface of the front part of the base unit 3. Attached. An expansion box 9 is attached to the rear bottom surface of the base unit 3. At the front end of the base unit 3, the handle 17, which is used when the operator carries the computer 1, is freely attached to the base unit 3 by a slide. The handle 17 has a pair of legs 61 attached to the handle 59 and the base unit 3 by a slide material.

The base unit 3 has a substantially spherical lower case 11 and a rear top cover 13 covering the rear portion of the lower case. The upper wall of the rear top cover 13 is formed in the shape of the end fitting which is low, and the recessed part 27 opened upward and forward is formed in the center of the edge part. The recessed part 27 is provided with the socket 15, and is attached to the top cover by rotational movement material. In the lower part of the socket 15, a cable guide duct 19 for guiding a cable guided to the display unit 5 in the base unit 3 is fitted to the socket 15 by rotation. The guide duct 19 is fixed in the recessed portion 27 of the top cover 13. The detailed structure of this cable guide duct 19 is disclosed in US Pat. No. 4,864,523 (Korean Patent Application No. 1987 Room 15054). And the leg part 37 of the display unit 5 is fitted in the socket 15, and screwing is carried out. In addition, a decorative cover 25 is disposed on the upper portion of the front surface of the socket 15 to conceal a screw hole to fix the socket 15 and the display unit 5. Further, the detailed structure of the cover 25 is described in Japanese Patent Application No. 1-271722 (3KG 12901) ((US Application No. 07/598519 (October 19, 1990), EPC Application No. 903115251 (October 19, 1990), Korean Application No. 1990 Patent No. 16682 (October 19, 1990), Taiwan Application No. 80100030 (filed on January 1, 1991)] The cover 25 is removed and the socket 15 and the display unit 5 are removed. When the fixing screw is removed, the display unit 5 can be removed from the socket 15. The detailed structure of the detachable hinge mechanism of the display unit 5 is described in Japanese Patent Application No. 1-282621 (3KG 11392). 07/428772 (October 30, 1989), German publication DE3936261A1, Korean Patent Application Publication No. 90-6988, Taiwan application 78108088 (October 20, 1989) The display unit 5 and the base unit 3 have a socket 15 And the detailed structure of the earth mechanism is described in Korean Patent Application No. 1-283725 (3KG 12611) [US application 07/576650 (September 5, 1990), EPC application 9011721.2 (1990. 9.6), Korea application 1990 13971 (1990. 9 5), Taiwan application 79107538 (September 7, 1990)].

Intake slits 21 and exhaust slits 23 are formed to cool the inside of the base unit 3 that extends from the rear surfaces on both sides of the top cover 13 to the upper surface. A plurality of LED lamps 29 are provided for informing the operator of the operating state of the laptop computer 1 extending from the upper end of one end of the top cover 13 to the upper surface. The anti-theft hook of the computer 1 which is not shown in figure is provided in the side surface on the opposite side of the base unit of FIG. This anti-theft hook is disclosed in detail in Japanese Patent Application Laid-Open No. 2-65384.

The display unit 5 has a liquid crystal display (LCD) 31 and a base cover 33 for accommodating and fixing the LCD 31 and a display cover 35 covering and hiding portions other than the display surface of the LCD 31. have. The leg portion 37 fitted to the socket 15 with a detachable material is integrally formed with the base frame 33. The display unit 5 has a rotational position inclined at an angle with respect to the base unit 3 as shown in FIG. 1 and a closing position covering the keyboard unit 7 as shown in FIG. It can be rotated integrally with the socket 15 between them. A pair of latch clocks 39 are provided at both upper ends of the base frame 33. A plurality of intake slits 41 for introducing cooling air into the display unit 5 are formed at the lower end of the display cover 35. In the display unit 5, both side surfaces of the LCD 31 are provided with converters (not shown) for boosting the low voltage guided in the base unit 3 through the cable guide duct 19 and the socket 15 to a high voltage. have. The attachment structure of this converter is Japanese Patent Application Laid-Open No. 1-283724 (3KG 12614) [US Application 07/577535 (September 6, 1990), EPC Application No. 90117213.0 (September 6, 1990), Korea Application No. 1990 Special 13970 (1990. 1990). 9. 5), Taiwan application 79107539 (September 7, 1990)].

The keyboard unit 7 includes a keyboard body 43 and a keyboard frame 45 that covers and hides portions other than the keys of the body and at the same time holds the body. In the front part of the upper surface of the keyboard frame 45, a pair of latch holes 47 which engage with a pair of latch clocks 39 of the display unit 5 are formed. On the inner surface of the frame 45, when the latch hole 47 and the latch click 39 are disengaged, the hole cover 49 covering the latch hole 47 is provided with a rotating material.

In the substantially center of the upper end of the display unit 5, a dial key 55 is provided which restricts the movement of the latch click 39 and locks the display unit to the closing position of FIG. A plurality of exhaust slits 57 are formed on both sides of the base frame 33 of the display unit 5 to exhaust the air in the display unit 5 to cool the unit 5.

The expansion box 9 houses a floppy disk drive (FDD), an expansion board, a modem card, and the like. The expansion box 9 is attached to the lower case 11 of the base unit 3 by screws. An insertion hole 53 is formed in the side wall 51 of the expansion box 9 that forms part of the side wall of the base unit 3 to allow the floppy disk to be inserted into and taken out of the FDD.

3 and 4 are diagrams for explaining the mounting state of the components in the base unit (3).

On the bottom surface of the lower case 11 of the base unit 3, a main printed circuit board (PCB) 63 is placed to face the keyboard unit 7. The bottom surface of the case 11 constitutes the mounting surface 65 in the present invention. A plurality of bosses 67 are provided on the mounting surface 65, and the main PCB 63 is attached to the bosses 67. On the main PCB 63, a SOJ type memory element 69 surface-mounted on a PCB 63, a ZIP type memory element 71 to be pin-mounted, a DIP type memory element 86, and an inclined SIMM socket 73 Many electronic components, such as the upright SIMM socket 75, the connector 77 to which the connector in the expansion box 9 is connected, and the SIMM 78 attached to the socket 73 and 75, are mounted. In the vicinity of the center of the upper surface of the PCB 63, a plurality of, for example, three impact absorbing circular levers 81 are fixed. Each lever 81 is disposed on the upper side of the boss 67 of the lower case 11.

A shield plate 83 for magnetically shielding the main PCB 63 is attached to the front of the lower case 11, and is located between the keyboard unit 7 and the PCB 63. The shield plate 83 covers and hides the main PCB 63. A circumferential support post 85 is screwed to the shield plate 83, and is directed toward the PCB 63 from the shield plate. These support posts 85 are provided at positions corresponding to the levers 81 on the main PCB 63, and the lower ends of the respective posts are mounted on the corresponding levers.

The main body 43 of the keyboard unit 7 has a substrate 87 on which a plurality of keys are placed, which is adjacent to the shield plate 83 and located in parallel. The lower portion of the keyboard substrate 87 and a portion corresponding to the support post 85 immediately above are attached with a shock absorbing lever 89. The connector 93 is fixed to the rear end of the lower surface of the keyboard base 87, that is, the end of the top cover 13 side. The connector 93 electrically connects the CPU on the main PCB 63 and the keyboard substrate 87 via the flat cable 81. The flat cable 91 is fixed to the PCB 63 at one end thereof, and the rear end thereof is detachably connected to the connector 93.

In addition, a reinforcing plate 95 for reinforcing the strength of the base unit 3 is provided at a substantially central portion of the lower case 11, and a cooling fan for cooling the inside of the base unit 3 is provided at the rear end of the case 11. 97) is installed.

The keyboard unit 7 of the present embodiment is inclined downward toward the operator, that is, forward, so that the operator can easily operate the keys. Therefore, the base substrate 87 and the shield plate 85 are also inclined similarly. And the shield plate 83 comprises the inclined surface in this invention.

In the base unit 3 of the above-described configuration, the distance between the shield plate 83 and the PCB 63 is widest in the vicinity of the center of the base unit 3, and narrower toward the front end of the base unit 3. Thus, in order to efficiently and efficiently mount each electronic component in the base unit 3, a plurality of first regions 74 of the main PCB 63 having the highest height from the main PCB 63 to the shield plate 83 are provided. Upright SIMM socket 75 is provided. These sockets 75 are provided adjacent to each other in parallel and extend in the width direction of the base unit 3. Each socket 75 is equipped with a SIMM 72 having a thick spherical substrate and a plurality of memory elements mounted on the substrate in a row in the longitudinal direction thereof, and mounted substantially perpendicular to the PCB 63. From the PCB 63 to the shield plate 83 from the second region 76 of the main PCB 63 located at the front end of the unit 3 rather than the first region 74, that is, from the first region 74. An inclined SIMM socket 73 is provided in the second region having a low height. These sockets 73 are provided adjacent to each other in parallel and extend in the width direction of the base unit 3. Each socket 73 is equipped with a SIMM 79 such as the SIMM 72, and is mounted inclined by a predetermined angle with respect to the main PCB 63 in the same direction as the shield plate 83. In the embodiment, the SIMM 79 is inclined with respect to the PCB 63 by an angle larger than the shield plate 83, but this inclination angle is appropriately set according to the required mounting density.

SIMMs 72 and 79 are formed in the same order and shape. The SIMMs 72 and 79 are mounted to the sockets 75 and 73 in a state where the long sides of the substrates are parallel to the PCB 63 and the shield plate 83, respectively.

As described above, in the first region 74 of the main PCB 63, by mounting the SIMM 72 in an upright state, the component mounting density becomes very high. In the second region in which the SIMM 79 cannot be mounted in an upright position, the SIMM 79 is inclined and mounted in the same direction as the shield plate 83 so that the mounting density is lower than that of the first region. Considering the height from (63) to the shield plate 83, it is possible to mount parts with the highest mounting density.

On the main PCB 63, the third position is located at the front end of the base unit 3 than the second region 76, the height from the PCB 63 to the shield plate 83 lower than the second region A ZIP type memory element 71, a DIP type memory element 86, and the like are mounted in a region 78 of the region 78. As shown in FIG. In the fourth region 80 of the PCB having a lower height from the main PCB 83 to the shield plate 83 than the third region 78, elements having a lower height such as the SOJ type memory element 69 are mounted. It is.

According to the personal computer configured as described above, according to the interval from the main PCB 63 to the shield plate 83, the parts mounted in each area of the PCB are divided, and the SIMM socket is connected to the shield plate (from the main PCB 83). The upright SIMM socket 75 and the inclined SIMM socket 73 are distinguished and divided according to the height to 83). Therefore, even though the distance from the main PCB 63 to the shield plate 83 is narrowed from the center portion of the base unit 3 toward the front end portion, the component arrangement is possible without reducing the mounting density of the component as much as possible. Become.

In addition, a connector 93 for electrically connecting the keyboard unit 7 and the main PCB 63 is fixed to the rear end of the base substrate 87. Therefore, the space with the largest distance between the keyboard unit 7 and the PCB 63 can be effectively used.

The shield plate 83 located below the keyboard unit has a support post 85 protruding toward the PCB 63, and the lower end of each post is carried on the lever 81 on the PCB. Therefore, even when the key of the keyboard unit 7 is hit, the central portion of the shield plate 83 does not bend toward the PCB 63. Therefore, the shield plate 83 abuts on the electronic components on the PCB 83, thereby preventing the electronic components from being damaged.

The present embodiment has described the mounting structure of an electronic component on a PCB located under an inclined keyboard, but the present invention is not limited to this, and the base mounting surface and the inclined surface inclined with respect to the mounting surface are described. It can be applied to any part as long as the parts are mounted in the area between them.

In addition, although SIMM 72 and 79 used the same dimension and the same shape, SIMM which has a different dimension and shape may be used. In the present embodiment, the SOJ type memory element as the surface mount type element and the ZIP type memory element as the pin mount type element are shown. However, the surface mount type and the pin mount type include the SOP type memory element and the DIP type memory element. There are electronic components and any of these can be used.

Claims (15)

A box having a placing surface and an inclined surface inclined at a predetermined angle with respect to the placing surface; A main circuit board attached to the mounting surface substantially parallel thereto and having a first region facing the inclined surface, and a second region shorter than the distance from the first region to the inclined surface; ; A first socket in said first region for mounting a first electronic component with a detachable material substantially perpendicular to said circuit board; And a second socket in the second region inclined in the same direction as the inclined surface to install the second electronic component as a detachable material. The electronic device of claim 1, wherein the first and second electronic components have the same dimensions. 2. The apparatus of claim 1, wherein the first electronic component comprises a first spherical first substrate and a first single in-line memory module having a plurality of elements mounted on the substrate, wherein the first substrate is the main substrate. An electronic device mounted on a circuit board approximately vertically. 4. The electronic device of claim 3, wherein the first electronic component includes a plurality of the first single in-line memory modules, and the modules are installed in parallel with each other. 5. The second electronic component of claim 4, wherein the second electronic component has a second substrate having the same dimensions as the first substrate of the first single in-line memory module and a plurality of elements mounted on the second substrate. And a second substrate of the second single inline memory module, wherein the second substrate of the second single inline memory module is inclined with respect to the main circuit board. 6. The electronic device of claim 5, wherein the second substrate of the second single in-line memory module is inclined with respect to the main circuit board by an angle greater than the inclination angle of the inclined surface. 6. The electronic device of claim 5, wherein the second electronic component includes a plurality of the second single in-line memory modules, and the second substrates of these modules are installed in parallel with each other. 8. The electronic device of claim 7, wherein each of the first and second modules is provided such that long sides of the first and second substrates are parallel to the mounting surface and the inclined surface. The said main circuit board has a 3rd area | region whose distance to the inclined surface is shorter than the distance from a said 2nd area | region to an inclined surface, is provided in the said 3rd area, and is provided with the said 2nd area | region And a third electronic component having a height lower than that of the electronic component. 10. The electronic device of claim 9, wherein the third electronic component includes a ZIP type memory element. The electronic device of claim 9, wherein the third electronic component comprises a DIP type memory element. The said main circuit board has a 4th area | region whose distance to the inclined surface is shorter than the distance to the inclined surface from the said 3rd area | region, and is provided in the said 4th area | region, An electronic device further comprising a fourth electronic component having a lower height than the electronic component. The electronic device of claim 12, wherein the fourth electronic component comprises an SOJ type memory element and an SOP type memory element. The electronic device according to claim 1, wherein the box includes a bottom wall having the mounting surface, a shield plate having the inclined surface, and a keyboard unit disposed substantially parallel thereto on the upper side of the shield plate. . A box having a bottom wall; A keyboard unit installed on the box inclined at a predetermined angle with respect to the bottom wall; A shield member disposed between the keyboard unit and the bottom wall at an angle with respect to the bottom wall; A main region attached on the bottom wall substantially parallel thereto and having a first region facing the shield member and a second region shorter than the distance from the first region to the shield member; A circuit board; A plurality of first electronic components disposed substantially perpendicular to the main circuit board in the first region and arranged in parallel with each other; It is provided in the said 2nd area inclined in the same direction as the said inclined surface, and is provided in parallel with each other, Comprising: The 2nd electronic component which has the same dimension as the said 1st electronic component is characterized by the above-mentioned. Electronics.