JP2001290563A - Card type personal computer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a card PC having a structure which enables a CPU to easily be replaced and easily radiates the heat of the CPU. SOLUTION: This card PC is equipped with a CPU 21 as a heat generating body, a substrate 22 (2nd substrate) where the CPU 21 is mounted, a substrate 23 (1st substrate) as the main board of the card PC, a metallic lower frame 24, screws 25 which fix the 2nd substrate 22, 1st substrate 23, and lower frame 24, and an external connector 26 as an interface for an external device. The CPU 21 is exposed to outside the housing of the card PC, so the CPU 21 can easily be replaced and the heat of the CPU 21 is easily radiated to outside the PC card, so that heat radiation effect can efficiently be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a portable personal computer (hereinafter referred to simply as "P").
C ") or Point Of Sales (" POS ")
The present invention relates to a card-type PC mounted on a small information processing device such as a terminal, and more particularly to a card-type PC having a structure with high heat dissipation efficiency (hereinafter, also simply referred to as “card PC”).

[0002]

2. Description of the Related Art In recent years, various small information processing apparatuses such as portable PCs and POS terminals have been developed. In such a small-sized information processing apparatus, it is required to keep development costs and production costs low, and a general-purpose card PC in which functions of a personal computer are modularized has been developed. In this card PC, when a central processing unit (hereinafter simply referred to as a “CPU”) operates, power is consumed and heat is generated, which hinders the operation of other electronic components such as a memory. May come. Therefore, in the card PC, the CPU
It is necessary to have a structure that efficiently dissipates the heat generated from the heat.

FIG. 4 is a sectional view of a conventional card PC. 4, this card PC includes a metal upper frame 41, a CPU 42, a board 43 on which the CPU 42 is mounted, a filler 44 for conducting heat, a metal lower panel 45, and an external device. , An external connector 46 as an interface, a screw 47 for fixing the upper frame 41 and the board 43, and an upper panel 48 for covering the external connector 46.
And have.

The upper frame 41 is made of a metal having good heat conductivity, such as a zinc alloy, and is formed so as to cover the substrate 43.

[0005] The CPU 42 attaches a COB (Chip O
n Board) or SMT (Surface Mounting Technolog)
y) is implemented.

The filler 44 is provided between the CPU 42 as a heating element and the upper frame 41 and between the CPU 42 and the upper frame 4.
It is filled so as to come in contact with 1. Therefore, the heat of the CPU 42, which is a heating element, is conducted to the upper frame 41 via the filler 44 and is radiated to the outside from the upper frame 41.

[0007]

However, according to the conventional card PC, since the CPU 42 is surrounded by the lower panel 45 and the upper frame 41, the CPU
2 cannot be easily replaced. For this reason, with the diversification and speeding-up of processing required for the card PC, a higher speed CPU is required to be mounted.
There was a problem that it was very difficult to upgrade to a faster one.

In the conventional card PC, the CP
The heat generated from U42 is transferred to the filler 44 and the upper frame 4
1 through which heat is dissipated through the heat sink 1, resulting in low heat dissipation efficiency and high-speed CP.
When U is mounted, the power consumption of the CPU is increased and the amount of heat generated is increased, so that there is a problem that the operation of other components in the card PC may be hindered.

In view of the above, an object of the present invention is to make it possible to easily replace a CPU.
To provide a card PC that can easily radiate the heat of the card PC.

[0010]

In order to solve the above-mentioned problems, a card-type personal computer according to the present invention has a card including a central processing unit for executing a predetermined program, and a memory for storing the program and data. In the personal computer, the central processing unit is mounted so that at least a part thereof is exposed outside a housing.

Further, in the above-mentioned card PC, the central processing unit is mounted on a board so as to expose a heating surface.

According to the above configuration of the present invention, since the central processing unit is mounted so as to be exposed to the outside of the housing, the central processing unit can be easily replaced, and the central processing unit is generated from the central processing unit. Heat can be easily dissipated.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an example of the configuration of the card PC of the present invention. In FIG. 1, this card P
C is a CPU 1 that controls the entire system, and a DRAM (Dy) that stores programs and data executed by the CPU 1.
and a bus controller 3 for controlling a bus, a VGA (Video Graphics Array) chip 4 for controlling display processing on a CRT (Cathode Ray Tube) display or an LCD (Liquid Crystal Display), and display data. Video memory 5 for temporarily storing
And keyboard, FDD (Floppy Disk Drive), HD
Flash ROM (Read Only Me) that stores programs for controlling various devices such as D (Hard Disk Drive)
mory) 6, an FD (Floppy Disk) controller 7 for controlling input / output to / from an FDD (Floppy Disk Drive), and H
An I / O (Input / Output) controller 8 for controlling input / output to an externally connected device such as a DD (Hard Disk Drive) or a keyboard.

FIG. 2 is a sectional view of the card PC of the present invention. 2, the card PC includes a CPU 21 and
A board (hereinafter, referred to as “second board”) 22 on which the CPU 21 is mounted, a board (hereinafter, referred to as “first board”) 23 serving as a main board of the card PC, a metal lower frame 24, A screw 25 for fixing the two substrates 22, the first substrate 23 and the lower frame 24 is provided, and an external connector 26 is provided as an interface with an external device.

The CPU 21 mounts through holes on the second substrate 22 (mounting by inserting pins into through holes of the substrate) or surface mounting (SMT: Surface Mounting).
Technology) and is exposed on the surface of the card PC. At this time, it is preferable to mount the CPU 21 so that the surface opposite to the heat radiation surface of the CPU 21 contacts the second substrate 22.

As described above, since the CPU 21 is exposed outside the housing of the card PC, when the CPU 21 is upgraded, the CPU 21 can be easily replaced. Further, since the heat radiating surface of the CPU 21 is exposed to the outside of the housing of the card PC, a fan can be arranged on the heat radiating surface of the CPU 21 to directly cool it. Therefore, CP
The heat of U21 is radiated to the outside of the card PC, and a heat radiation effect can be obtained efficiently.

FIG. 3 is a sectional view of another embodiment of the card PC of the present invention. In FIG. 3, this card PC is a CP
U31 and a board on which the CPU 31 is mounted (hereinafter referred to as “second
Board 32), a board to be a main board of the card PC (hereinafter, referred to as a "first board") 33, a lower metal frame 34, a second board 32, a first board 33, and a lower frame. A screw 35 for fixing the heat sink 34, an external connector 36 serving as an interface with an external device, and a fin (radiation fin) for increasing a heat radiation surface area to increase heat radiation efficiency.
37.

The CPU 31 is mounted on the second substrate 32 through holes (mounting by inserting pins into the through holes of the substrate) or surface mounted (SMT: Surface Mounting).
Technology). Further, the heat radiation surface of the CPU 31 is in contact with the heat radiation fin 37.

As described above, since the CPU 31 is exposed outside the housing of the card PC, when the CPU 31 is upgraded, the CPU 31 can be easily replaced. Further, since the heat radiation surface of the CPU 31 is exposed to the outside of the housing of the card PC and is joined to the heat radiation fins 37, the heat of the CPU 31 is radiated to the outside of the card PC through the heat radiation fins 37 having a large heat radiation area. The heat radiation effect can be obtained efficiently.

[0021]

As described above, according to the card PC of the present invention, since the CPU is exposed outside the housing of the card PC, the CPU can be easily replaced.
The heat of U can be easily dissipated.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a card PC of the present invention.

FIG. 2 is a sectional view of the card PC of the present invention.

FIG. 3 is a sectional view of another embodiment of the card PC of the present invention.

FIG. 4 is a sectional view of a conventional card PC.

[Explanation of symbols]

1, 21, 31, 42 CPU (Central Processing U
nit) 2 DRAM (Dynamic Random Access Memory) 3 Bus controller 4 VGA (Video Graphics Array) chip 5 Video memory 6 Flash ROM (Read Only Memory) 7 FD (Floppy Disk) controller 8 I / O (Input / Output) controller 22 , 23, 32, 33, 43 Substrates 24, 34 Lower frame 25, 35, 47 Screws 26, 36, 46 External connectors 37 Heat radiation fins 41 Upper frame 44 Filler 45 Lower panel 48 Upper panel

Claims (2)

[Claims] 1. A card-type personal computer comprising a central processing unit for executing a predetermined program and a memory for storing a program, data, etc., wherein said central processing unit is at least partially exposed outside a housing. A card-type personal computer, characterized in that the card-type personal computer is mounted. 2. The card-type personal computer according to claim 1, wherein said central processing unit is mounted on a board so as to expose a heat-generating surface.