KR100699269B1 - Portable computer and method for forming rear cover of the same - Google Patents

Abstract

The present invention relates to a portable computer having a display unit and a back cover molding method thereof, the portable computer comprising: a front cover having a display opening to which a display surface of the display unit is exposed; Formed by molding of a plastic material is coupled to the front cover, characterized in that it comprises a rear cover having a reinforcing member embedded in the plate direction. Thereby, there is provided a portable computer and a rear cover molding method thereof, which have improved the strength of the rear cover of the display unit.

Description

PORTABLE COMPUTER AND METHOD FOR FORMING REAR COVER OF THE SAME}

1 is a perspective view of a typical portable computer,

2 is a cross-sectional view of the image forming unit;

3 is a rear view of the rear cover,

4 is a perspective view of the reinforcing member,

5 is a cross-sectional view showing a coupling state of the rear cover and the positioning pin,

6a to 6d is a schematic cross-sectional view showing the molding process of the rear cover,

7 is a flowchart illustrating a molding step of the rear cover.

Explanation of symbols on the main parts of the drawings

10: portable computer 20: computer body

21: casing 23: keyboard

25: touch pad 27: hinge portion

30: image forming unit 31: front cover

33: display unit

40: rear cover 50: reinforcing member

51: positioning hole 53: through hole

60: molding material

70: upper mold 71: upper runner

73: cooling flow path 80: lower mold

81: lower runner 83: positioning pin

85: positioning pin hole 87: positioning core

89: Milfin 91: permanent magnet

93: permanent magnet housing 95: the rear cover mold

100: molding material nozzle portion 101: nozzle body

103: screw 105: nozzle heater

110: mold driving unit 120: pin pin driving unit

The present invention relates to a portable computer and a rear cover molding method thereof, and more particularly, to a portable computer and a rear cover molding method of improving the strength of the rear cover of the display unit.

The portable computer has more functions than a regular desktop computer, but is light in weight and small in volume, so that it can be easily carried, thereby providing a lot of conveniences that can not be obtained from a normal desktop computer. In addition, the use of the computer is hardly restricted by the place, and the use range of the computer is further expanded. In general, a portable computer includes an image forming unit for forming an image, and a computer body supporting the image forming unit and equipped with various hardware.

The image forming unit of the portable computer has a display unit such as a display panel for forming an image, a front cover for supporting the display unit to form an appearance, and a rear cover coupled to the front cover with the display unit therebetween. The rear cover serves to protect a display unit such as an LCD display panel, and is made of a die casting of a special material such as magnesium (Mg), or is usually made of plastic. Portable computers tend to be used without being embedded in a bag or being fixed in a fixed position due to the convenience of carrying.

However, in the related art, when the rear cover of a portable computer made of a material such as plastic is used in a crowded transportation method, or when a heavy object such as a book is placed on the rear cover while the computer is covered, the rear cover may be damaged due to external force or impact. The cover may be relatively deformed and the display may be damaged. Such damage to the display unit may cause defects such as white spots, watering, and the like on the LCD panel. In addition, in the case of magnesium die casting, the strength of the rear cover is improved, but the process such as NC processing and anodizing after casting is complicated and the yield is low.

Accordingly, it is an object of the present invention to provide a portable computer and a method for forming the rear cover thereof, which improves the strength of the rear cover of the display unit.

According to the present invention, there is provided a portable computer having a display unit, comprising: a front cover having a display opening at which a display surface of the display unit is exposed; It is achieved by a portable computer, characterized in that it is formed by molding of a plastic material and coupled to the front cover, the rear cover having a reinforcing member embedded along the plate surface direction.

Here, the reinforcing member has a plurality of through-holes formed in the transverse direction on the plate surface, the molding member may flow in the transverse direction of the plate surface.

In addition, the reinforcing member is a magnetic material can be fixed in position when the injection molding material by the magnetic force of the permanent magnet.

In addition, the molding material may include ABS (Acrylonitrile Butadiene Styrene) resin to improve fluidity.

On the other hand, an object of the present invention, in the rear cover molding method of a portable computer having a rear cover which is coupled to the front cover having a display opening and molded by a plastic material, the molding material is embedded in the rear cover along the plate surface direction; Providing an upper mold and a lower mold for forming the rear cover; Disposing the reinforcing member on the lower mold; Combining the upper mold and the lower mold; Injecting a molding material between the upper mold and the lower mold; Cooling the molded material; It is achieved by the back cover molding method of a portable computer comprising the step of separating the upper mold and the lower mold.

Here, the step of preheating the reinforcing member to a predetermined temperature before the reinforcing member arrangement step can prevent a defect such as cracks when cooling the molding member.

In addition, the reinforcing member is provided with a magnetic material, the lower mold may include a permanent magnet for holding and holding the reinforcing member by a magnetic force.

In addition, the reinforcing member has a plurality of positioning holes formed through a predetermined position of the plate surface, the lower mold may include a positioning pin for fixing the position of the reinforcing member corresponding to the positioning hole.

The method may further include extracting the rear cover with a mil pin movable to the lower mold, and the rear cover extracting step may include the positioning pin after the mil pin presses the rear cover. The rear cover may be taken out by pressing to prevent a defect of the rear cover.

Hereinafter, a portable computer and a rear cover molding method thereof according to an embodiment of the present invention will be described with reference to the accompanying drawings.

In the portable computer 10 and its rear cover molding method according to the present invention, the portable computer 10 includes an image forming unit 30 and an image forming unit 30 for forming an image, as shown in FIG. ) Has a computer body 20 equipped with various hardware. 1 to 5, the portable computer 10 includes: a front cover 31 having a display opening on which the display surface of the display unit 33 is exposed to the image forming unit 30; It is formed by molding of a plastic material is coupled to the front cover 31, and has a rear cover 40 having a reinforcing member 50 is embedded along the plate surface direction.

As shown in FIG. 1, the computer main body 20 includes a casing 21 for forming an appearance and a rear portion of the casing 21 to be combined with the image forming unit 30 to form the image forming unit 30. And a hinge portion 27 rotatably supporting. In addition, the computer main body 20 includes a main board (not shown) supporting electronic components such as a central processing unit (CPU) and a RAM, and a front side of the computer main body 20 so as not to overlap the main board and the auxiliary storage device. The keyboard 23 is provided in the area and serves as an input means, and the touch pad 25 is provided on one side of the keyboard 23 to control a point appearing on the screen of the image forming unit 30.

One side of the casing 21 is provided with a connection port (not shown) to couple earphones and power, etc., and the other side of the casing 21 is provided with a card slot (not shown) for mounting a communication or memory card Can be.

As illustrated in FIG. 1, the image forming unit 30 includes a display unit 33, such as a thin-film display panel such as an LCD (Liquid Crystal Display) panel, which forms an image, and a display surface of the display unit 33. The front cover 31 having the display opening exposed, and the rear cover 40 having a reinforcing member 50 is formed by molding of a plastic material and coupled to the front cover 31, and embedded along the plate surface direction. Have The image forming unit 30 is coupled to the hinge portion 27 to rotate in the vertical direction with respect to the computer main body 20. Thus, the image forming unit 30 may be rotated downward with respect to the computer main body 20 to be folded on the computer main body 20, and may be rotated upward with respect to the computer main body 20 and spread out on the computer main body 20. (See Figure 1).

As shown in FIGS. 1 and 2, the display unit 33 forms an image, and not only an LCD (Liquid Crystal Display) method of implementing an image by applying an electrode to a thin plate made of small pixels, but also of a gas. It may include a plasma panel display (PDP) method using the discharge principle.

1 and 2, the front cover 31 has a display opening for supporting the display surface of the display unit 33 is exposed, and forms an appearance. In addition, the front cover 31 is coupled to the rear cover 40 with the display unit 33 interposed therebetween. The front cover 31 may be coated with a paint having a predetermined color to make the exterior beautiful.

2, 3 and 5, the rear cover 40 is coupled to the front cover 31 with the display unit 33 therebetween by molding by a plastic material, along the plate direction It has a reinforcing member 50 is embedded. In addition, the rear cover 40 may be formed to apply a paint having a predetermined color to make the appearance beautiful. Thus, the rear cover 40 is stronger than being molded only with a molding material such as plastic, thereby reducing damage due to impact on the display unit 33.

Molding material 60, as shown in Figures 2, 3 and 5, to form the appearance of the rear cover 40, which can be easily flow and injected into the rear cover mold (95) during molding Select the material. For example, the molded material 60 is preferably a mixture of PC and ABS (Acrylonitrile Butadiene Styrene) rather than 20% of polycarbonate (PC) and glass fiber (GF), and ABS is more advantageous in terms of fluidity than the mixture of PC and ABS.

2 to 5, the reinforcing member 50 is embedded along the plate surface direction of the rear cover 40 formed by molding of the plastic material. In addition, the reinforcing member 50 has a plurality of positioning holes 51 through the predetermined size so that the reinforcing member 50 is disposed at a predetermined position of the lower mold 80, and the molding material 60 during molding. It has a plurality of through-holes 53 formed in the transverse direction on the plate surface so as to flow through the plate surface of the reinforcing member 50. In addition, the reinforcing member 50 is a magnetic material, and made of stainless steel such as SUS430, which is resistant to corrosion, and may be fixed by a magnetic force of the permanent magnet 91. In addition, the reinforcing member 50 is to maintain the parallelism without bending in the plate-like, it is possible to improve the strength by forming a predetermined bend in the longitudinal direction or the width direction as necessary.

Positioning hole 51, as shown in Figures 2 to 5, of the positioning pin 83 to be described later to be determined to a predetermined position in the process of placing the reinforcing member 50 in the lower mold (80) Corresponding to the size penetrates the plate surface of the reinforcing member 50 in the transverse direction. In addition, the positioning hole 51 may be changed in number and position in accordance with the size of the reinforcing member (50).

As shown in FIGS. 2 to 5, the through holes 53 are formed in a plurality of transverse directions on the plate surface of the reinforcing member 50 such that the molding material 60 flows through the plate surface of the reinforcing member 50. Penetrated In addition, unlike the embodiment, the through hole 53 may change its size and position according to the material, temperature, size of the mold, and the like. Thus, the injection molding material 60 may be uniformly injected as a whole.

Positioning pins 83, as shown in Figure 5, protrudes from the plate surface of the lower mold 80 of the rear cover 40 is movable so that the reinforcing member 50 is disposed on the lower mold 80 Determine the position and pressurize the molding material 60 in the process of taking out the back cover 40 to be described later. Then, the positioning core 87, as shown in Figure 5, has a positioning pin hole 85 for receiving the positioning pin 83, the permanent magnet 91 to accommodate the permanent magnet 91 The permanent magnet accommodating part 93 recessed from the plate surface of the lower mold 80 is corresponded to).

The permanent magnet 91 is inserted into the permanent magnet accommodating portion 93 of the positioning core 87, as shown in FIG. In addition, the permanent magnet 91 has a predetermined thickness and is formed in an annular shape, but may be changed into various shapes as necessary. Thus, the permanent magnet 91 is fixed to the reinforcing member 50 using a magnetic force to prevent the flow of the reinforcing member 50 according to the injection of the molding material (60).

Milpin 89, as shown in Figure 5, is provided in a plurality of the lower mold 80 to press the molding material 60 to take out the back cover 40 from the lower mold (80). The mil pin 89 is moved by the mil pin driving unit 120, it is possible to change the number and arrangement position according to the thickness, size, etc. of the rear cover (40). The mill pin 89 may be disposed at a position shifted from the through hole 53 of the reinforcing member 50 to reduce deformation of the rear cover mold 95 due to pressure.

With this configuration, the portable computer 10 and its rear cover molding process according to the present invention will be described with reference to FIGS. 6 and 7 as follows.

In the upper mold forming step (S210), as shown in FIGS. 6A and 7, the upper runner 71 and the lower runner 81 are provided to inject the molding material 60, and the upper part of the rear cover 40 is provided. To form. In addition, the upper mold 70 has a cooling passage 73a through which a cooling fluid can flow to cool the injected molding material 60.

In the lower mold forming step (S220), as shown in FIGS. 6A and 7, a lower runner 81 for guiding the molding material 60 to be injected, a plurality of positioning pins 83 protruding from the plate surface, and Milpin 89 is provided, and forms a lower portion of the rear cover 40. In addition, the lower mold 80 has a cooling passage 73b formed therethrough to cool the molding material 60. In addition, the lower mold 80 is pressed against the mold driving unit 110 capable of moving the lower mold 80 in the molding process, and the rear cover 40 to take out the rear cover 40 from the lower mold 80. Milpin driving unit 120 that can move the milpin 89 and the like is coupled. The mold driving unit 110 and the pin pin driving unit 120 may be coupled to the upper mold 70, unlike the embodiment. The mold driving unit 110 and the mill pin driving unit 120 may select a known driving means such as a motor, a pneumatic cylinder, and the like to move the lower mold 80 and the mill pin 89.

In the reinforcing member preheating step (S230), as shown in FIG. 7, a reinforcing member 50 having a positioning hole 51 and a through hole 53 formed before the reinforcing member arranging step S235 to be described later is predetermined. Preheated to temperature. Preheating of the reinforcing member 50 is to prevent the crack (cracks) of the rear cover 40 due to shrinkage during cooling.

In the reinforcing member arrangement step (S235), as shown in FIGS. 6A and 7, the reinforcing member 50 is seated in the lower mold 80 to be embedded in the molding material 60 to be molded. As described above, the reinforcing member 50 is provided with a positioning pin hole 85 and a through hole 53 so that the positioning hole 51 of the reinforcing member 50 is positioned on the positioning pin 83 of the lower mold 80. ) Are coupled to each other, and the reinforcing member 50 is fixed to the lower mold 80 by the magnetic force of the permanent magnet 91 embedded in the lower mold (80).

In the upper and lower mold coupling step (S240), the upper mold 70 and the lower mold 80 are coupled to each other to form a rear cover mold (95). There is a vertical type and a horizontal type in the coupling method of the upper mold 70 and the lower mold 80, the vertical type as in the embodiment is advantageous because the flow of the reinforcing member 50 in the molding process less than the horizontal type. 6B, the molding material 60 is injected into the space created by the combination of the upper mold 70 and the lower mold 80, as shown in Figure 6b to form the rear cover 40 can do.

In the molding material injection step (S250), as shown in FIGS. 6C and 7, the molding material nozzle part 100 is coupled to the upper mold 70 so as to be rearward through the upper runner 71 and the lower runner 81. The molding material 60 is injected into the cover mold 95. At this time, the upper runner 71 and the lower runner 81 may be maintained at a predetermined temperature by a heater (not shown) in order to increase the fluidity of the molded material 60. The molding material nozzle part 100 includes a nozzle body 101, a screw 103 for injecting the molding material 60 at a predetermined speed, and a nozzle heater 105 for maintaining the molding material 60 at a predetermined temperature. Can be provided.

In the holding step S260, as shown in FIGS. 6C and 7, the molding material 60 injected into the rear cover mold 95 is partially formed by the temperature difference between the upper mold 70, the lower mold 80, and the like. When the shrinking region is generated by the normal cooling, the molding material 60 is pressed again so that the molding material 60 is uniformly filled in the rear cover mold 95.

In the molding material cooling step (S270), as shown in FIGS. 6C and 7, the cooling fluid is circulated through the cooling flow path 73 formed in the upper mold 70 and the lower mold 80 to form the molding material through heat transfer. 60 is cooled. Here, in the cooling process of the molding material 95, the size of the cooling flow path 73 of the upper mold 70 and the lower mold 80 in consideration of the thickness and size of the rear cover mold 95 and the reinforcing member 50, etc. And the arrangement structure can be changed. As a result, uniform cooling may be performed to prevent deformation of the rear cover mold 95. For example, since the amount of the molding material 60 is large, the thick portion may make the cooling rate uniform, for example, by arranging the cooling passages 73 a lot. In addition, oil, water, or the like may be used for the cooling fluid.

In the upper and lower mold separation step (S280), as shown in FIGS. 6D and 7, the mold driving unit 110 is operated to separate the lower mold 80 from the upper mold 70.

In the rear cover take-out step (S290), as illustrated in FIGS. 6D and 7, the positioning pins 83 and the mill pins 89 press the rear cover 40, and the rear cover 40 from the lower mold 80. 40) is taken out. In addition, the corner portion of the positioning core 87 may be rounded to facilitate taking out of the rear cover 40. In addition, in the rear cover taking-out step (S290), since the positioning pin 83 presses an area made of a thin molding material 60 of the rear cover 40, the mill pin 89 presses the rear cover 40 first. Next, the positioning pin 83 is installed so that the positioning pin 83 presses the rear cover 40. Thus, deformation of the rear cover 40 may be prevented when the rear cover 40 is taken out.

In addition, the rear cover mold 95, which has been subjected to a predetermined process, may be coated with a predetermined paint to have a beautiful appearance.

Therefore, according to the present invention, since the reinforcing member is embedded in the molding material to form the rear cover, the strength of the rear cover is reinforced to improve the strength of the rear cover, thereby preventing defects caused by damage to the display unit such as LCD. have. In addition, it uses a good fluidity material such as ABS in the process of forming the back cover, preheating the reinforcing member to prevent cracks, etc. during the cooling process, and at the time the positioning pin and the mill pin presses the back cover It is possible to form the back cover stably and easily by preventing the deformation when taking out the back cover.

As described above, according to the present invention, there is provided a portable computer and a method for forming the rear cover thereof, which improves the strength of the rear cover of the display unit.

Claims (12)

In a portable computer having a display unit, A front cover having a display opening through which the display surface of the display unit is exposed; And a rear cover having a reinforcing member which is formed by molding of a plastic material and is coupled to the front cover and is embedded in the plate surface direction. The method of claim 1, The reinforcing member is a portable computer, characterized in that it has a plurality of through holes formed in the transverse direction on the plate surface. The method of claim 1, The reinforcing member is a portable computer, characterized in that the magnetic body. The method of claim 1, The molded material comprises a ABS (Acrylonitrile Butadiene Styrene) resin. In the back cover molding method of a portable computer having a back cover is molded by a plastic material and coupled to the front cover having a display opening, Providing a molding material embedded in the rear cover in a plate direction, and an upper mold and a lower mold for molding the rear cover; Disposing the reinforcing member on the lower mold; Combining the upper mold and the lower mold; Injecting a molding material between the upper mold and the lower mold; Cooling the molded material; And separating the upper mold and the lower mold. The method of claim 5, And preheating the reinforcing member to a predetermined temperature prior to the reinforcing member placing step. The method of claim 5, The reinforcing member is provided with a material having magnetic properties, And the lower mold has a permanent magnet for holding and holding the reinforcing member by magnetic force. The method of claim 5, The reinforcing member has a plurality of positioning holes formed through the predetermined position of the plate surface, And the lower mold includes a positioning pin that fixes the position of the reinforcing member in correspondence with the positioning hole. The method of claim 8, Further comprising the step of taking out the back cover with a milpin movable to the lower mold, The rear cover extracting step of the rear cover forming method of the portable computer, characterized in that after the pressing pin presses the rear cover and the positioning pin presses the rear cover to take out the rear cover. In the image forming unit for a portable computer, A display unit, And a rear cover covering the display unit and having at least one reinforcing member. In the mold apparatus for molding the back cover of the image forming portion of the portable computer, The upper mold, A lower mold in contact with the upper mold to form a space for forming the rear cover between the upper mold and the upper mold; A positioning core provided in the lower mold such that a reinforcing member is located in the space; And a nozzle for injecting a molding material into the space to mold the back cover having the reinforcing member. A rear cover mounted to a portable computer having a display portion and a front cover having a display opening to which the display surface of the display portion is exposed, Formed by molding of a plastic material is coupled to the front cover, the rear cover comprising a reinforcing member embedded in the plate direction.

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