JPH08211964A - Information processor - Google Patents

Abstract

PURPOSE: To improve the rigidity of the entire case near a rotation braking mechanism part by fastening the metal fitting for fixing of the rotation braking mechanism part and the frame of a liquid crystal display unit by fastening parts such as screws or the like. CONSTITUTION: The LCD unit 26 is arranged between an LCD lower case and an LCD upper case and the rotation braking mechanism 25 is constituted of a friction plate 30, an LCD case fixing part 41, a main body fixing part 40 and an L-shaped fixing metal fitting 39 for integrating the LCD unit 26. Fastening together with an LCD pressing metal fitting 38, the L-shaped fixing metal fitting 39 fixes the LCD case fixing part 41 to plural bosses 35 integrally formed with the LCD lower case by plural fixing screws 28. The main body fixing part 40 is fixed to a main body upper case 23 by the screw 28, the opening and closing of the LCD unit 26 are stopped at an optional angle by the plural friction plates 30 and a metallic plate 37 and the friction plate 30 and the metal plate 37 are fixed by a bolt 31 through a rotary shaft 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thin type information processing apparatus called a laptop type or a notebook type having a liquid crystal display device, and more particularly to a rotary braking when opening and closing a liquid crystal display unit of the information processing device body. A display device having a structure in which whitening or cracking does not occur near the rotation braking mechanism of the liquid crystal display unit case even if a large amount of stress is applied to the vicinity of the mechanism, or a thin information processing device such as a notebook type or laptop type It is about.

[0002]

2. Description of the Related Art Conventionally, an LCD (Liquid
A notebook information processing apparatus using a Crystal Display as shown in FIG. 2 is known. The notebook information processing device is thin and lightweight (with product weight within 1.8 kg), and is excellent in portability and storability. However, on the other hand,
It is very difficult to improve the strength of the entire case because the thickness of the case case is as thin as 1.8 mm.

Here, the case cracking case in the vicinity of the rotary braking mechanism in the conventional product will be described with reference to FIG. The rotation braking mechanism portion 25 is provided so that the LCD unit 26 can be freely opened and closed and fixed by a friction plate 30 at an arbitrary angle. The friction plate 30 is inserted into the rotary shaft 24, sandwiched by a plurality of metal plates 37, and fixed by bolts 31.

The crack 34 in the LCD lower case 22 is formed by the boss 35 for fixing the rotation braking mechanism 25 and the LCD unit 26.
3 that secures the frame leg 20 with fasteners such as screws
It occurs from the root of 6. The reason is that when the LCD is opened, the reaction force of the opening force is stronger than the stopper of the LCD case.
(Applying a force of about 0.8 kgf)] is caused by stress concentration when applied, and cracks caused by fatigue of the boss portion due to repeated opening and closing. These are structural problems due to the single fixing of the LCD unit 26.

This is because conventionally, as shown in FIG. 4 (b), the rotation braking mechanism 25 and the LCD unit 26 are independently fixed at positions separated by a predetermined distance L, respectively. That is, it was fixed with the gap of M open.

As can be seen from the figure, naturally the LCD lower case 2
The stress is concentrated on the roots of the second bosses 35 and 36. The most concentrated stress is at the root of the boss 35, and strain measurement of the rotation braking mechanism by a strain gauge and CAE
(Computer Aided Engineer
The maximum stress is 60 N / m from the strength analysis by ng).
^It took about ² (6.1 kgf / mm ² ) and it was found that cracking occurred.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to maintain thinness, lightness, portability and storability of an information processing device, and to prevent whitening and cracking of a case portion. It is to prevent. As means for preventing the above-mentioned problems, there are a method of increasing the thickness of the case and a method of providing a plurality of ribs at a place where whitening or cracking occurs. However, in the former case, in order to prevent the cracking, the thickness of the case must be increased by a factor of 2 to 3, and if the thickness of the case is increased, the weight of the entire case and the thickness of the case increase. Therefore, it is unsuitable for a notebook type information processing device that is thin, lightweight, portable, and storable. For the latter, if the number of ribs is increased and reinforced,
Although the thin shape can be maintained, the addition of ribs causes a sink mark on the surface of the case, resulting in an increase in weight and a new problem of impairing the appearance and design.

The present invention has means for solving the above problems and improving the rigidity of the entire case in the vicinity of the rotation braking mechanism without increasing the wall thickness of the case or disposing a plurality of ribs. , To provide a notebook type information processing device which is thin and lightweight.

[0009]

[Means for Solving the Problems] The object is to form a main body case, a display case attached to the main body case so as to be openable and closable, and a gap is formed between an inner surface of the display case and a facing surface of a liquid crystal display unit. As described above, in the information processing apparatus in which the liquid crystal display unit is provided in the display case, this is achieved by fastening the fixing bracket of the rotation braking mechanism portion and the frame of the liquid crystal display unit with fastening components such as screws.

[0010]

According to the above construction, the fixing member of the rotary braking mechanism and the frame of the liquid crystal display unit are fixed by fastening parts such as screws, so that the rotary braking mechanism and the liquid crystal display unit function as one component. The bending stress due to the reaction force when the liquid crystal display device is opened and closed is not concentrated on the liquid crystal display device case near the fixing boss or on the surface of the liquid crystal display device case. It is possible to improve. This improves the rigidity of the case and acts to prevent whitening and cracking of the boss.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration, operation and effect of one embodiment of the present invention will be described below.

First, an outline of the notebook type information processing apparatus is shown in FIG.
This will be described with reference to FIG.

FIG. 2 is a perspective view of a notebook type information processing device in which a liquid crystal display device (hereinafter referred to as LCD) is opened.

In the figure, reference numeral 1 is attached to the rear end of the main body lower case 2 by a rotation braking mechanism 25 so as to be rotatable.
It is an LCD equipped with a CD unit 26. The lower case 2 of the main body has a main control board (not shown) including a power supply unit, a microcomputer, a control LSI, an IC, and printed wiring, and an FDD 4 (Floppy DiskD).
rive) etc. are provided. Reference numeral 6 denotes a keyboard arranged on the front side of the lower case 2 of the main body, in which character keys and key tops of the right numeric keypad project from the upper surface of the upper case 23 of the main body. These keys 29 are used as input keys 29 for documents and graphics, or as print designation keys 29. Reference numeral 7 is a power switch, and 8 is a printer cable.

Reference numeral 15 is an LCD glass, which is used for the display portion of the LCD 1. Reference numeral 9 denotes a main control board on which an inverter board is mounted, which constitutes a backlight for dimming a commanded and power-supplied one at a certain frequency and illuminating it from the back surface of the LCD 1 via a cold cathode fluorescent tube 10.

The notebook type information processing apparatus is constructed as described above, the power switch 7 is pushed, and the key 29 of the keyboard 6 is pushed.
It is possible to input and edit a document by operating.

Further, the trackball 3, the designation switch 5 and the release switch 5A can execute the document editing process and the graphic editing process. The display information of the pointing cursor is determined by the designating switch 5 according to the cursor movement signal input from the trackball 3, and released by the release switch 13. As a result, the specified icon, ruled line, or the like can be recognized.

Control LSI with the microcomputer
Uses a CPU (Central Processing Unit) to process a signal input by the key 29, the trackball 3 or the like,
Creation of characters, character strings, or graphics, and display control on the LCD based on the created data.

When printing a document or the like, a command is sent to the CPU by designating and confirming with a predetermined print instruction key 29 of the keyboard 6 or the trackball 3, and characters stored in a recording device (not shown) or C mounted on the main control board based on image data
A control element such as PU generates an operation signal of a thermal transfer printer (not shown), and this signal is sent to the thermal transfer printer by the printer cable 8 to print.

Reference numeral 22 denotes an LCD lower case.
A fixing boss 27 is integrally formed on the lower case 22. As shown in detail in FIG. 6, the frame leg 20 of the LCD unit 26 is placed on the fixing boss 27,
It is fixed by a fastening component such as a screw 28.

FIG. 3 is a perspective view of the LCD unit section. The glass 15 is a laminated glass of an upper glass and a lower glass, and a soft member 16 is arranged between the glass 15 and the LCD upper frame 17. The LCD upper frame 17 is formed of a steel plate. Reference numeral 9 denotes an inverter board, which controls the input voltage and current of the cold cathode fluorescent tube 10 to make a light emitting source capable of changing the brightness.
The light of the cold cathode fluorescent tube 10 is supplied to the entire area of the display screen by the plate-shaped light guide 11, and the LCD elements are evenly distributed through a diffusion plate (not shown) provided on the light guide 11. It has a mechanism to illuminate.

Reference numeral 12 denotes a mold frame, which carries the light guide 11 and the cold cathode fluorescent tube 10. The mold frame 12 has a structure of being pressed by an LCD lower frame 13 made of an aluminum plate. Reference numeral 14 is the above-mentioned IC carrier on which a drive IC or the like is mounted.

The glass 15 is composed of two pieces of glass 1
It consists of 5, and liquid crystal is enclosed between them. And
The wiring pattern provided around the surface of the glass 15 and the plurality of IC electrodes provided on the IC carrier 14 are adhered to each other, and the LCD driving circuit provided in the main body case drives the LCD. Since the LCD is a field effect element, the wiring pattern of the segment connecting the pixel parts is
It is designed so as not to cross the electrodes on the opposite substrate that sandwich the liquid crystal layer. Reference numeral 16 is a soft member such as silicon rubber or plastic.

Reference numeral 17 denotes an LCD upper frame, which is a holding hole 18 of the LCD lower frame 13 when unitized.
In this system, the claws 19 of the upper frame 17 are fixed together. Reference numeral 20 denotes a frame leg, which is fixed to the LCD lower case 22 with a fastening component such as a screw.

Next, the structure in which the rotation braking mechanism section and the LCD unit section, which are the main structures of the present invention, are integrated with each other.
This will be described with reference to FIGS. 5, 6, 7 and 8.

First, one embodiment of integration will be described in detail with reference to FIGS. 1 and 5.

FIG. 1 is a perspective view of a notebook type information processing apparatus showing an embodiment of the present invention, and FIG. 5 is an enlarged perspective view of a rotary braking mechanism section.

In the figure, the LCD unit 26 is an LCD
It is arranged between the lower case 22 and the LCD upper case 21. The rotation braking mechanism portion 25 is composed of a friction plate 30, an LCD case fixing portion 41, a main body fixing portion 40, and an L-shaped fixing metal fitting 39 for integrating with the LCD unit 26.
Further, the rotation braking mechanism portion 25 is arranged at the left and right ends of the LCD unit 26, as shown in FIG. 38 is an LCD pressing metal fitting, and the L-shaped fixing metal fitting 3 can be tightened together with the LCD pressing metal fitting 38.
9 is fixed to the LCD lower case 22 with a screw 28.
Further, the LCD case fixing portion 41 is formed with a plurality of screws 28 at a plurality of positions so as to be integrally formed with the LCD lower case 22.
It is fixed at 5.

Reference numeral 40 denotes a main body fixing portion, which is fixed to the main body upper case 23 with a screw 28. The opening and closing of the LCD unit 26 is stopped at an arbitrary angle by the plurality of friction plates 30 and the metal plate 37. The friction plate 30 and the metal plate 37 are fixed by bolts 31 through the rotary shaft 24.

With this structure, there is no gap between the LCD unit 26 and the rotation braking mechanism portion 25, and the LCD unit 26 and the rotation braking mechanism portion 25 are integrated by a fastening component such as a screw 28. By this integration, the rigidity of the entire LCD case is strengthened, the load applied to the bosses 35 and the like when the LCD is opened and closed is dispersed, and stress concentration is relieved. As a result, whitening or cracking of the LCD lower case 22 does not occur.

According to the experiment, by adopting the structure of the present invention, it is possible to stop the rotation braking mechanism portion 25 as shown in FIG.
The stress in the vicinity of the boss portion 35 of the CD lower case 22 can be reduced to 1/8 to 1/10 of that of the conventional product when the pressing force is 8 to 10 N. FIG. 9 is a graph showing the stress applied to the vicinity of the rotation braking mechanism portion 25 when the LCD unit 26 is opened. This is the LCD lower case 22 due to the strain gauge.
The strain is measured at a place sandwiching the boss 35, and the stress is calculated from the strain. If the curve of A has the conventional structure,
The curve of B is the case of the structure of the present invention. a and c are measured values on the left side of the boss, and b and d are measured values on the right side of the boss.

From this graph, the LCD unit 2 of the present invention
It is obvious that the rigidity can be improved by integrating 6 and the rotation braking mechanism 25.

FIG. 6 is a plan view showing an application example of integration when the frame legs 20 are arranged above and below the LCD unit 26. Rotating the frame leg 20 to the braking mechanism 25
It is located below the LCD case fixing portion 41, and is fixed together with the screw 28 from above the LCD case fixing portion 41.

In FIG. 7, the screws 28 on the frame leg 20 are omitted in FIG. 6, and a groove for inserting the frame leg 20 is provided in the LCD case fixing portion 41 to prevent a lateral shift, thereby fixing the LCD case. It shows an example in which the unit 41 is structured so as to be pressed down from above to be integrated.

In FIG. 8, the LCD case fixing portion 41 is formed in a concave shape so that the frame leg 20 is inserted between them, and the fixing position of the frame leg 20 is m> 0 from the center of the fixing position of the LCD case fixing portion 41. The structure is shifted so that the stress applied to the LCD lower case 22 is dispersed.

According to the present invention configured as described above,
The rigidity of the housing with respect to the opening and closing of the LCD is improved, and damage to the LCD lower case can be prevented.

[0037]

As described above, according to the present invention, the main body case, the display case attached to the main body case so as to be openable and closable, and the gap formed between the inner surface of the display case and the facing surface of the liquid crystal display unit. As described above, in the information processing device in which the liquid crystal display unit is provided in the display case, the fixing bracket of the rotation braking mechanism portion and the frame of the liquid crystal display unit are configured to be fastened by fastening parts such as screws. It is possible to prevent thinning, weight reduction, portability, and storability without sacrificing cost, and to prevent whitening and cracking of the storage case of the liquid crystal display element unit even when an external force is applied when opening / closing.

Therefore, there is provided a thin-type information processing device which is not easily damaged when a reaction is caused by opening the storage case of the liquid crystal display element unit or when the case is strongly pushed, or when there is repeated stress due to opening and closing of the case. be able to.

[Brief description of drawings]

FIG. 1 is a perspective view of a notebook information processing apparatus showing an embodiment of the present invention.

FIG. 2 is a perspective view for explaining the outline of the notebook information processing device.

FIG. 3 is a perspective view for explaining an LCD unit section.

FIG. 4 is a perspective view showing a cracked case in the vicinity of the rotation braking mechanism in the conventional product.

FIG. 5 is an enlarged perspective view of a rotation braking mechanism portion according to the present invention.

6A and 6B are a plan view and a cross-sectional view showing an application example in which the frame of the LCD unit is vertically positioned.

7A and 7B are a plan view and a cross-sectional view showing an application example in which a frame is sandwiched between rotary braking mechanisms.

FIG. 8 is a plan view showing an application example when the frame is inserted with the rotary braking mechanism having a concave shape.

FIG. 9 is a graph showing the relationship between the stress near the boss of the rotary braking mechanism and the pressing load.

[Explanation of symbols]

1 ... LCD, 2 ... bottom case, 3 ... trackball,
4 ... FDD, 5 ... designation switch, 5A ... release switch,
6 ... Keyboard, 7 ... Power switch, 8 ... Printer cable, 9 ... Inverter board, 10 ... Cold cathode fluorescent tube, 11
... light guide body, 12 ... mold frame, 13 ... LCD lower frame, 14 ... IC carrier, 15 ... glass, 16 ... soft member, 17 ... LCD upper frame, 18 ... holding hole, 19 ...
Nails, 20 ... Frame legs, 21 ... LCD upper case, 22 ...
LCD lower case, 23 ... Main body upper case, 24 ... Rotating shaft,
25 ... Rotational braking mechanism, 26 ... LCD unit, 27 ... Fixing boss, 28 ... Screw, 29 ... Key, 30 ... Friction plate, 3
1 ... Bolt, 32 ... Rotational braking mechanism storage pocket, 33 ...
Ribs, 34 ... Cracks, 35 ... Boss (1), 36 ... Boss (2), 37 ... Metal plate, 38 ... LCD retainer fitting, 39 ...
L-shaped fixing bracket, 40 ... Main body fixing portion, 41 ... LCD case fixing portion.

Front page continuation (72) Inventor Hidekazu Koshigashi 1-1-1, Higashitaga-cho, Hitachi-shi, Ibaraki Hitachi Ltd. Electric Appliances Division, Electric Appliances Division Taga Headquarters (72) Inventor Takahiro Iwasaka Higashitaga, Hitachi-shi, Ibaraki 1-1-1 Machi, Electric Appliances Division, Hitachi Ltd., Ltd. (72) Minor Funabashi 1-1-1, Higashi-Tagacho, Hitachi City, Ibaraki Hitachi Ltd. (72) Inventor, Koji Aizawa 1-1-1, Higashi-Taga-cho, Hitachi-shi, Ibaraki Inside the Taga Headquarters, Electrical Equipment Division, Hitachi, Ltd. No.1 In-house electrical equipment division, Hitachi, Ltd. (72) Masao Ouchi 1-1-1, Higashi-Tagacho, Hitachi City, Hitachi, Ibaraki In-house electrical equipment division, Hitachi, Ltd.

Claims (8)

[Claims] 1. A main body case, a display case attached to the main body case so as to be openable and closable, and a display case so that a gap is formed between the inner surface of the main body case and the facing surface of the liquid crystal display unit. An information processing device in which a liquid crystal display unit is provided inside, in which the fixing bracket of the rotation braking mechanism and the frame of the liquid crystal display unit are fastened by fastening parts such as screws. 2. A main body case, a display case attached to the main body case so as to be openable and closable, and a display case such that a gap is formed between the inner surface of the main body case and the facing surface of the liquid crystal display unit. In an information processing device with a liquid crystal display unit inside, when fixing the fixing bracket of the rotation braking mechanism inside the liquid crystal display unit case, the liquid crystal display unit fixed part or the liquid crystal An information processing device that is fixed and lapped above a fixing portion located near the center of the screen of the display unit to the rotation braking mechanism. 3. The information processing apparatus according to claim 1, wherein the fixing bracket of the rotary braking mechanism is extended to a height equivalent to that of the liquid crystal display unit, and the plurality of points are fixed together with the frame of the liquid crystal display unit. Processing equipment. 4. The information processing apparatus according to claim 2, wherein, with the liquid crystal display unit opened, the liquid crystal display unit fixing portion located below and the fixing portion of the rotary braking mechanism portion are fixed so as to mesh with each other. An information processing device provided with means. 5. The information processing apparatus according to claim 1, wherein the liquid crystal display unit and the rotary braking mechanism section share a boss for fixing with a fastening component such as a screw. 6. A main body case, a display case attached to the main body case so as to be openable and closable, and a display case such that a gap is formed between an inner surface of the display case and a facing surface of the liquid crystal display unit. In an information processing device having a liquid crystal display unit inside, an information processing device in which a frame fitting port of a concave liquid crystal display unit is provided in a fixing metal fitting of a rotation braking mechanism section. 7. The information processing apparatus according to claim 6, wherein a frame insertion port of a concave liquid crystal display unit is provided integrally with a boss for fixing a fixing metal fitting of the rotation braking mechanism section. 8. The information processing apparatus according to claim 1, wherein an L-shaped fixing metal fitting is integrally provided on the rotation braking mechanism, and the frame on the short side of the liquid crystal display unit is fixed by a fastening member such as a screw. Processing equipment.