WO2011011909A1

WO2011011909A1 - Integrative computer and its mainframe case

Info

Publication number: WO2011011909A1
Application number: PCT/CN2009/072418
Authority: WO
Inventors: 秦彪
Original assignee: Qin Biao
Priority date: 2009-07-30
Filing date: 2009-07-30
Publication date: 2011-02-03

Abstract

An integrative computer and its mainframe case are provided. A rectangular power supply (1) is located on the top of mainframe case, a mainboard (8) is located below, interfaces of peripheral equipment extend downwardly, extension card (18) placed vertically is located parallel with the mainboard and extends toward hard disk (21), which allow layout to be compact, space to be used efficiently. Base on a cross-ventilation principle of warm air upward flowing, warm air circumfluence is reduced. CPU cooling fan (10) makes cold air blow from outside of mainframe case impact directly on CPU radiator, or the hot air heated by radiator is blow out of mainframe case directly, which is of benefit to cooling the CPU and whole computer. Metallic motherboard (7), side-board (30), bottom-Board (26) and back case (15) made by injection molding, are integrative, which ensures the structural intension of mainframe case, mainboard maybe normal style such as ATX and etc., which can make the mainframe case and power supply standardization.

Description

One-piece computer and its mainframe

The present invention relates to the field of personal computers, and more particularly to a computer having a flat structure and a host computer having an integrated structure disposed behind the display.

Background technique

After the main unit is set on the liquid crystal display (flat display), the desktop computer that constitutes the integrated structure is popular because of its overall simplicity and small space. However, the existing one-piece desktop computer, due to the CPU and the overall heat dissipation problem, the motherboard is not a universal series motherboard (such as ATX, DTX, etc.), most of the all-in-one notebooks use a notebook (mobile) CPU, so the CPU performance is not high, Even with a desktop CPU, performance is not fully utilized due to CPU cooling. There is no standard expansion slot on the motherboard, and expansion cards such as graphics cards cannot be installed. That is to say, the existing one-piece desktop computer, the overall performance is far less than the split-type computer. There are still some shortcomings: Users can't upgrade, install expansion cards (such as graphics cards), and they can't assemble their own computers.

Summary of the invention

The invention provides a computer with integrated structure and a main engine box thereof, and pays special attention to the heat dissipation of the CPU and the whole machine, so that the whole machine has a compact structure, and the current standard series of main boards (such as ATX, BTX and DTX type main boards) can be used. A standard expansion card (such as a graphics card) can be installed to realize a standard chassis and power supply with a single structure, and the user can assemble the integrated computer by himself.

The technical solution of the present invention is: adopting a flat panel display (such as a liquid crystal display); the host is disposed behind the display screen, and the host comprises a main board, a power source and a hard disk; and the feature of the invention is: the power source is arranged in a long strip on the host At the uppermost end, the length of the power supply is more than two-thirds of the length of the main board; the main board is disposed under the power supply, and is fixed on the main board made of a metal plate, and the side plates of the metal plate are arranged on both sides of the main board, the main board One side is on one side of the board, the other side is on the opposite side of the hard disk, and the other side of the hard disk is on the other side board. The hard disk is fixed directly on the motherboard through the accessories; the peripheral interface on the main board is facing down, and the CPU is set outside. The upper part of the interface is located near the side panel; the main board is provided with an expansion slot and is erected on the side of the hard disk on the main board; the expansion card is inserted into the expansion slot on the main board through the chamfering conversion board, Or the expansion card is directly connected to the 90° corner expansion slot on the motherboard, where the expansion card is folded to the side of the hard disk.

From the aspect of heat dissipation, the power supply is set at the top, and the hot air generated by the power supply itself can be discharged upward by natural convection, eliminating the influence of heat dissipation on other components in the host. If an exhaust fan is installed on the power supply, it acts as a system exhaust fan, which is more conducive to air convection in the main box, effectively discharging hot air, reducing (eliminating) the return of hot air into the main box and affecting the heat dissipation of other components. The hard disk and expansion card are erected for natural convection cooling. If the CPU cooling fan adopts the axial flow type, the air outlet can directly face the ventilation window opened on the back cover of the main unit, which can directly suck in the cold air outside the chassis and blow it onto the CPU heat sink, which is beneficial to the CPU heat dissipation. If the CPU cooling fan is an exhaust fan, the air heated by the CPU is directly discharged from the chassis to reduce the air temperature inside the main unit, which is beneficial to the heat dissipation of the whole machine. The peripheral interface of the motherboard is facing down, which is the lowermost end of the host. The gap between the peripheral interface and the air hole opened on the lower baffle can be used as the air inlet. The natural convection is used, and the hot air moves upward to reduce the hot air returning. Inside the chassis, the COMS tube and capacitors that are powered by the CPU above the peripheral interface are directly cooled by the new cold air.

The arrangement of the CPU, the motherboard peripheral interface and the expansion slot of the computer of the present invention is identical to the arrangement on the motherboards of the ATX, BTX, DTX and ITX types, so that the motherboard in the computer of the present invention can adopt ATX, BTX, DTX and ITX. Types of motherboards, these common standard motherboards can reduce the development cost and cycle of new products, have better compatibility, easy to repair, maintain and upgrade, and low cost. At present, ATX type motherboards basically monopolize the personal desktop computer motherboard market. Among them, M-ATX and M-ATX narrow boards are the most popular. They are roughly 244X 244mm and 244X 220mm respectively, and there are also FlexATX boards (size 228.6 X 190.5). Mm). The 19-inch display is the current mainstream display, and its size is: standard screen is roughly 400mm (width) X 350mm (height), wide screen is roughly 450mm (width) X 300mm (height). The following table lists the power consumption of a high-profile computer component. The 350W ATX standard power supply can meet the requirements of the high-profile computer. It also includes the power required for the display. The dedicated power supply for the display is also omitted. , reducing costs.

The 350w ATX standard power supply can be designed as a long strip power supply with a width of about 70mm, a length of no more than 360mm, and a height of 50mm (this is different from the current ATX standard power supply). The width of the power supply (70mm) plus the height of the M-ATX main board (244mm) is roughly 314mm, which is equivalent to the height of the 19-inch widescreen display; the length of the M-ATX main board (roughly 244mm) plus the width of the desktop standard hard disk (100mm multipoint), it is more than 345mm, which is equivalent to the length of the above-mentioned long strip power supply, and does not exceed the width of the 19-inch standard screen, and is also equivalent to the width of the 17-inch display. Therefore, the power supply is arranged in a strip shape above the main unit, and the hard disk is placed side by side with the main board. Below, this arrangement is compact. For a 19-inch display, the main unit can be kept behind the screen regardless of the standard screen or the wide screen. For 17-inch displays, the motherboard should use M-ATX narrow boards (or FlexATX boards). The length of the hard disk is roughly 150mm, which is smaller than the height of the ATX narrow board. Therefore, space can be left above or below the hard disk; if the plug of the hard disk is facing up and close to the lower end of the host, the space remains above. The layout facilitates the connection of the hard disk to the motherboard and the power supply.

The expansion card is inserted into the expansion slot on the motherboard through the angled adapter board, or directly connected to the 90° corner expansion slot on the motherboard to make the expansion card parallel to the motherboard. This can effectively reduce the thickness of the host. The hard disk is placed on one side of the expansion slot of the motherboard, and the expansion card is folded to the side of the hard disk, so that the expansion card can be stacked on the hard disk beyond the long part of the motherboard, thereby making full use of the space.

In the above arrangement, there is no space for the optical drive, and the optical drive can be designed as a separate external device, which is connected to the host through a cable (such as a USB cable), which is convenient for the user to select. For a 19-inch display, if you want to configure an optical drive on the main unit, you can use the following arrangement: Use M-ATX narrow board (or FlexATX board), the power supply is 85mm wide, and the length is equivalent to M-ATX narrow board (244mm long X 85mm wide completely) Can meet the size requirements of 350wATX standard power supply), the optical drive is set on the top of the hard disk, side by side with the power supply, the power supply is 85mm wide and the motherboard width (M-ATX narrow board width 220mm) is equal to 305mm, which is equivalent to the height of the 19-inch display. The invention proposes that the power source is long and the length is more than two-thirds of the length of the main board. The reason is: as far as possible, the inside of the main box behind the display screen is compactly arranged, the internal space is fully utilized, and the height direction is especially reduced. size of. Extending the power supply naturally reduces the width of the power supply (that is, the size of the main box height). The above-mentioned no-optical drive design using the M-ATX motherboard, the length of the power supply is the length of the motherboard plus the hard disk width. Design with optical drive: With M-ATX narrow plate, the length of the power supply is the same as the length of the main board, which will be more clearly shown in the following embodiments.

DRAWINGS

The invention will now be further described with reference to the drawings and embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic cross-sectional view showing a state in which a computer of the present invention stands on a countertop.

Figure 2 is a rear elevational view of the computer with the rear cover removed, showing the layout of the major components within the mainframe without the optical drive.

FIG. 3 is a rear view of the computer with the rear cover opened, the optical drive is arranged in the main body, and the folding angle conversion insert is lengthened. Figure 4 is a rear elevational view of the computer in which the back cover of the present invention is opened, with three expansion cards installed.

Figure 5 is a cross-sectional view taken along line A-A of Figure 4.

Figure 6 is a rear elevational view of the rear cover of the computer mainframe of the present invention, with an optical drive box.

Figure 7 is a cross-sectional view taken along line B-B of Figure 6.

Figure 8 is a rear view of the main unit of the computer of the present invention with the back cover open, and is provided with two layers of expansion card panel windows. Figure 9 is a rear view of the main unit of the computer of the present invention with the back cover open, without the optical drive box being disposed.

Fig. 10 is a rear view of the main unit of the computer of the present invention with the rear cover opened, and an expansion card panel window is added to the expansion of the main unit shown in Fig. 9.

In the figure, 1, power supply, 2, display, 3, CPU, 4, front shell, 5, support device, 6, peripheral interface, 7, motherboard, 8, motherboard, 9, back cover, 10, CPU cooling Fan, 11, arrow indicating air flow, 12, ventilation window, 13, vent, 14, exhaust fan, 15, rear case, 16, expansion slot, 17, angle adapter board, 18, expansion card, 19, Power output cable outlet, 20, display driver board, 21, hard disk, 22, hard disk fixing accessories, 23, reinforcing beam, 24, panel fixing accessories, 25, expansion card panel, 26, lower bezel, 27, optical drive, 28, Exhaust window, 29, exhaust vents, 30, side panels, 31, optical drive box, 32, chute, 33, panel window, 34, peripheral interface window, 35, screws.

Example

Figure 1 shows the main components of the computer of the present invention: front case 4, rear case 15, rear cover 9, flat panel display 2, power supply 1, motherboard 7, CPU3, CPU cooling fan 10. The motherboard 7 is the main bearing member in the mainframe. The main board, hard disk and optical drive will be fixed on the main board, so it should be made of metal plate. Power supply 1 is on the top of main board 8 (also the top of the main unit). The power supply 1 is provided with an exhaust fan 14. As a system exhaust fan, the exhaust fan 14 discharges the hot air in the main unit through the vent 13 to reduce the air temperature inside the main unit, strengthen the convection heat transfer in the main unit, and also radiate heat to the power supply 1. The CPU3 is disposed above the peripheral interface 6 of the main board 8. In the figure, the CPU cooling fan 10 is an axial flow fan, and the air outlet of the fan directly faces the ventilation window 12 on the rear cover 9, and the air outside the chassis (cold air) can be Directly sucked and blown onto the CPU heat sink, so the CPU has the best heat dissipation effect. The CPU cooling fan 10 can also be an axial flow exhaust fan, which directly discharges the hot air heated by the CPU heat sink to the chassis, can effectively reduce the air temperature in the host, and further improve the air convection in the host, which is beneficial to the CPU heat dissipation. It is also conducive to heat dissipation. The CPU cooling fan 10 shown in Figure 1 is axial-flow type. It can also use a centrifugal fan to directly draw in the cold air outside the chassis or to discharge the hot air heated by the CPU heat sink.

The support device 5 in Fig. 1 is connected to the main unit through a rotating shaft, and such a connection structure can adjust the upper and lower viewing angles of the display screen. The switch, indicator light and plug-in interface (such as USB port) of the main unit can be set on the front side of the front case 4, which is convenient for the user to operate.

Figure 2 shows the layout of the main components within a computer mainframe of the present invention. There is no optical drive in the main unit. The power supply 1 has a casing. The outer casing is usually made of metal plate. It has electromagnetic shielding function. The power supply is long and is set in the main box. At the uppermost end, the length is the same as the inner width of the main box, and two exhaust fans 14 are provided, and a vent 13 communicating with the inside of the main body. This design of the power supply facilitates the development of a power standard for a one-piece computer, thereby facilitating the development of a standard computer mainframe standard. The figure shows: The CPU is arranged above the motherboard peripheral interface 6, and only one expansion card 18 is installed; the expansion card 18 is inserted into the slot on the corner adapter board 17, and the corner adapter board 17 Plugged into the expansion slot 16 on the main board, the expansion card 18 is parallel to the main board 8, and the expansion card panel 25 is side by side with the peripheral interface 6 and facing downward.

The lower end of the main box in Fig. 2 is provided with a lower baffle 26, which is generally made of a metal plate for blocking electromagnetic wave leakage, and the lower baffle 26 has a peripheral interface window of the main board and a panel window of the expansion card. The peripheral interface window of the motherboard should also be provided with a window blank made of a metal plate that blocks electromagnetic leakage, which is not shown in the figure. The lower baffle 26 is provided with a reinforcing beam 23, which increases the strength of the lower baffle and cooperates with the panel fixing accessory 24 of the expansion card to effectively fix the expansion card panel 25 to achieve stability of the expansion card. The use of such an expansion card fixing structure is to facilitate the compatibility of the current standard expansion card with the computer of the present invention, and the expansion card 18 shown in the drawing is the current standard card.

2 shows: the hard disk 21 is disposed on one side of the expansion slot 16 and is located at the lower end of the main body. The hard disk 21 is fixed on the motherboard 7 through the hard disk fixing component 22, and the expansion card 18 is folded to the side of the hard disk 21, the hard disk There is a space between the 21 and the power source 1, and the display driving circuit board 20 can be placed there. The output cable of the power source 1 is very large, and the power output cable outlet 19 is also disposed here, which facilitates cable discharge. The design shown in Figure 2 uses the M-ATX motherboard, the display is 19-inch widescreen, the power supply size is 360 X 70 X 53 (mm), the desktop hard drive, no optical drive is configured, as can be seen from the figure, the layout is very compact And easy to install.

The computer of the present invention shown in FIG. 3 is provided with an optical drive. The optical drive 27 is disposed above the hard disk 21, and is disposed at the upper end of the main body, and is arranged side by side with the power source 1. The main board 8 is a M-ATX narrow board, and the power source 1 is provided with a metal casing, and FIG. 2 Compared to the power supply, the length is reduced, but the width is increased to achieve the same power output (above 350W). In order to reduce the size, especially the thickness, the optical drive 27 uses a mobile optical drive, and a space is left between the optical drive 27 and the rear cover. The display drive circuit can be disposed here, and the cover can also be provided with a centrifugal exhaust fan (there is no picture in the figure). Directly shown as the system exhaust fan, the exhaust window 28 is on the upper end side wall of the rear case 15, which increases the convection heat dissipation of the whole machine.

Figure 3 shows the position of the CPU cooling fan 10 (i.e., the position of the CPU) on the main board near the side panel 30. The CPU cooling fan 10 adopts a centrifugal fan with a hood. The air outlet of the fan directly faces the air outlet 29 opened on the side plate 30, and the air duct is disposed in the rear casing 15, and the air passage communicates with the power source 1. An exhaust window 28 is formed on the side wall of the upper end of the rear case 15 to communicate with the inside of the power source 1. The air driven by the CPU cooling fan 10 flows through the power source 1 (heats the device in the power source), and finally is discharged from the exhaust window 28 on the side wall of the upper end of the rear case 15, at which time the CPU cooling fan 10 functions as a system fan. Function, adopting such design, the advantages are as follows: The back of the computer can be free of ventilation window, and the computer can be installed close to the wall; the hot air heated by the CPU heat sink is directly discharged, which is beneficial to the heat dissipation inside the host; Noise can be effectively blocked by the enclosure, which reduces fan noise. In the power supply in Figure 3, a centrifugal exhaust fan can also be added to increase the air convection in the whole machine.

Figure 3 shows more clearly that the hard disk 21 is close to the lower end of the main chassis, the hard disk has a plug-in interface facing upwards, and there is space above the hard disk, so that the hard disk is connected to the power supply and the motherboard, and the output wire of the power supply is also here. Nearby is taken from the power supply case. The angled adapter board 17 of the expansion card 18 in FIG. 3 is different from that in FIG. 2, and can be divided into two spaces, thereby reducing the hot air generated by the expansion card and the hard disk into the CPU heat sink, which is beneficial to the CPU. Cooling.

In the computer of the present invention shown in FIG. 4, the CPU cooling fan 10 is also a centrifugal fan with a hood, but the air outlet of the fan directly faces the vent 13 of the power source 1, and the power supply 1 is provided with an axial exhaust fan 14, An axial exhaust fan 14 is disposed on the rear casing of the optical drive case 31. Compared with FIG. 3, there is a difference: an expansion card panel window is added, and a total of three expansion cards 18 are installed. The additional expansion card panel window is superimposed on the original reinforcing beam 23, and the expansion card is adopted. Also a current standard card. Figure 5 again shows the location of the hard disk and the arrangement of the three expansion cards. The hard disk 21 is flatly fixed on the motherboard 7, and the two sides of the motherboard 7 are provided with side plates 30, generally using metal plates, one for blocking electromagnetic waves and the other for strength structure requirements. One side of the main board 8 is on one side of the board, and the hard disk 21 is on the other side board. The two expansion cards 18 are folded to the side of the hard disk 21, and the portion beyond the length of the main board 8 is stacked on the hard disk 21. The CPU cooling fan 10 is centrifugal, and the air inlet of the CPU heat sink is on the side of the CPU, so that the other side is folded. The expansion card 18 on the side of the CPU can be stacked on the CPU cooling fan 10, so that the space is effectively utilized.

In the computer of the present invention shown in Figs. 2, 3, and 4, the rear cover 9 does not cover the power source 1, and the power source 1 is directly exposed. Such a design reduces the size of the rear cover 9 and facilitates standardization of the power source 1. Of course, the back cover 9 can also be designed to cover the power supply 1, and the appearance can be improved. In addition, the rear cover 9 and the rear cover 15 are divided into two parts, and the rear cover 9 can be easily opened, which is convenient for assembly and maintenance, but the rear cover 9 is not easily used as a bearing member. If you want to implement the back cover of the support point of the whole machine like the current display, you must design the back cover and the rear case (or the rear case of the part) into a single structure.

Figure 6 shows a mainframe of the computer of the present invention. The main chassis and the display are of an integrated structure. The main components include: a display screen, a front case, a rear case 15, a rear cover 9, a main board 7, and sides on both sides. Plate 30 and lower baffle 26. An air outlet 29 is formed in the side panel 30. The back cover 9 must have the function of shielding electromagnetic radiation to the outside, so that the back cover is generally made of a metal plate or a plastic with a shield. The main unit shown in FIG. 6 is provided with an optical drive box 31, and has only one panel window 33 of the expansion card, and is juxtaposed with the peripheral interface window 34 of the main unit, and both are opened on the lower baffle 26 of the main unit, and the lower baffle A reinforcing beam 23 is provided on the 26 . The panel fixing fitting 24 is fixed to the lower baffle 26 and the reinforcing beam 23 by screws (or clips). The panel window 33 has two panel mounting hardware 24 that secure both ends of the expansion card panel to make the expansion card panel (and expansion card) more secure. There are multiple expansion slots on the motherboard. To facilitate the expansion card to select the appropriate expansion slot to connect to it, the position of the panel fixture on the panel window should be designed to be adjustable. The panel fixing member 24 is shown in Fig. 6 to be slidable in the sliding groove 32 formed in the lower shutter 26, adjusted in position, and fixed by screws.

The back shell is manufactured by injection molding process, which is beautiful in appearance, high in efficiency and low in cost. The strength of the single rear case and the main board is low. To ensure the structural strength of the main box, the rear case, the main board, the side plates on both sides and the lower baffle should be connected and fixed into an integrated structure to form a frame structure with superior structural strength. The specific measures are as follows: the main board, the side plates on both sides and the lower baffle are processed by the same metal plate, or fixed by integral welding or riveting or screw connection, and the reinforcing plate is arranged on the lower baffle to increase the lower baffle. The strength is convenient for fixing the panel fixing accessories; the rear casing is fixedly connected with the side plates on both sides by screws or rivets, so that the rear casing and the main board are integrated, and the main casing shown in FIG. 6 adopts this structure. A plurality of screws 35 are attached to the side plate 30 to be fixed to the rear case 15. If the length of the main board exceeds the side plates on both sides, the structure in which the main board is beyond the side plate may be directly connected to the rear case by screws or rivets or fastenings. The rear case and the motherboard form a solid mainframe body, which bears the weight of all the components of the computer. The back cover can be opened at any time, which is convenient for the computer to assemble, and it is convenient for the user to assemble the computer or expand the computer.

Figure 7 is a cross-sectional view of B-B of Figure 6, with the side panels 30 on both sides abutting against the inner wall surface of the rear casing 15, and the side panels 30 and the inner walls of the rear casing 15 can be fixed by screws. The optical drive case 31 is fixedly connected to the main board 7, and the optical drive case 31 is fixedly connected to the rear case 15, which in turn reinforces the fixed connection of the main board 7 and the rear case 15. The display screen 2 is fixedly connected to the rear case 15 by screws (or snaps), and the front case 4 is fastened to the rear case 15. The display screen 2 and the rear case 15 are fixed in an integrated structure, which further improves the structural strength of the entire chassis.

The computer main chassis of the present invention shown in Fig. 8 is an extension shown in Fig. 6, and the rear cover 9 is replaced. A panel window in which an expansion card is added to the reinforcing beam 23 adds two panel windows. The second layer (added) of the expansion card's panel window is superimposed on the first layer (on the lower bezel) panel window. The figure shows that the second panel window is fixed on the reinforcing beam 23 by screws, and can also be fixed by fastening. The panel fixing fittings 24 on the panel window of the second layer are along the chute 32, and the left and right positions can also be adjusted to facilitate the expansion card to select a suitable expansion slot. At present, the functions of the computer motherboard and the chipset are very comprehensive. Generally, only the graphics card is installed, and there are not many installations of more than three expansion cards at the same time. Considering that the chassis is not too thick, the panel window of the computer and the main chassis of the present invention does not exceed two layers.

In the computer mainframe shown in Figure 9, there is no optical drive box in the chassis. Figure 10 is the extension of Figure 9. The rear cover is replaced and a panel window is added.

The hard disk of the present invention includes a mechanical hard disk and a solid state hard disk.

Claims

Claim

1. A computer, the host is disposed behind the flat panel display (2), the host comprises a main board (8), a power source (1) and a hard disk (21), wherein: the power source (1) is arranged in a strip shape. The upper end of the main unit, the power supply length is more than two-thirds of the length of the main board; the main board (8) is set under the power supply (1), fixed on the main board (7) made of metal plate; two of the main board (7) The side is provided with a side plate (30) made of a metal plate, one side of the main board (8) is placed on one side plate, and the opposite side is provided with a hard disk (21), and the other side of the hard disk (21) is placed on the other side plate. The hard disk (21) is fixed to the motherboard (7) directly or through accessories; the peripheral interface (6) on the motherboard is facing down, and the CPU (3) is placed above the peripheral interface (6) and close to the side panel; The slot (16) is erected on the main board (8) and is on the side of the hard disk (21); the expansion card (18) is extended through the chamfering adapter (17) and the expansion slot on the main board (8) ( 16) Plug, or expansion card directly with the 90 ° corner expansion plug on the motherboard The slot is inserted, and the expansion card is folded to the side of the hard disk.

2. The computer according to claim 1, wherein: the main board (8) is an ATX type main board, or a BTX type main board, or a DTX type main board, or an ITX type main board.

3. A computer according to claim 2, characterized in that the power source (1) is provided with a metal casing and is provided with an exhaust fan (14) and a vent (13) communicating with the interior of the main body.

4. The computer according to claim 2, characterized in that: the rear cover (9) of the main chassis is provided with a ventilation window (12) directly facing the tuyere of the CPU cooling fan.

5. The computer according to claim 2, wherein: the CPU cooling fan (10) is a centrifugal fan with a hood, and the air outlet of the fan directly faces the vent (13) on the power source (1), or An air vent (29) is provided on the side panel (30).

6. The computer according to claim 2, wherein: the optical drive is disposed in the host, and the optical drive (27) is disposed above the hard disk (21), adjacent to the upper end of the main body, side by side with the power source (1), and adopting a mobile optical drive .

7. The computer according to claim 7, wherein the rear cover of the optical drive (27) is provided with an exhaust fan.

8. A mainframe for a computer according to any one of claims 1 to 7, the main chassis and the display being of a unitary structure, characterized in that: the rear case (15) is an injection molded plastic part, the back cover (9) Made of metal plate or plastic with shield, the rear cover (9) and the rear cover (15) are two separate parts; the main board (7), the side plates (30) on both sides and the lower block The plate (26) is made of the same metal plate, or is fixed by integral by welding or riveting or screwing; the side plates (30) on both sides are fixed to the inner casing by screws or rivets (15), or the main board ( 7) The length is beyond the side plate (30), the rear case (15) and the main board (7) are beyond the side plate, and are fixed by a screw or rivet or fastening; the lower baffle (26) is provided outside the main board The interface window (34) and the panel window (33) of at least one expansion card have no more than two layers of panel windows, and the lower baffle (26) is provided with a reinforcing beam (23).

9. The main chassis according to claim 8, wherein: the panel window of the second layer expansion card is fixed by screws or fastenings, and is superposed on the reinforcing beam (23) on the lower baffle (26).

10. The main chassis according to claim 8, wherein: the panel window (33) is provided with a panel fixing fitting (24), and the position of the panel fixing fitting (24) on the panel window (33) can be adjusted left and right.