JP5609653B2 - Electronics - Google Patents

Description

  This case relates to an electronic device such as a notebook personal computer.

  2. Description of the Related Art A notebook personal computer (hereinafter referred to as “notebook PC”) has a structure in which a display device having a display screen is connected to a main body device on which a CPU (Central Processing Unit) is mounted so as to be freely opened and closed. The notebook PC is wired with a cable connecting the main body device and the display device. This cable transmits a signal representing an image to be displayed on the display screen. This signal is a high-frequency signal, and a cable with countermeasures against radio noise is used. A conductive cloth is wound around this cable to prevent radio noise. A structure is adopted in which a contact component such as a gasket connected to the ground is arranged in the notebook PC, and a cable is connected to the ground by bringing a conductive cloth into contact with the contact component. When this structure is adopted, parts such as a gasket are added only for the purpose of connecting the conductive cloth wound around the cable to the ground. Also, in the development stage of the notebook PC, if the cable is unstablely connected to the ground only with the contact parts such as gaskets that were originally installed, it is necessary to change the design such as the shape change of the installation part of such contact parts It may become. In the development of notebook PCs, such design changes are extremely inefficient in terms of cost.

  As a prior art, a structure is known in which a cable presser made of a rubber-like elastic body is fitted into a guide groove through which the cable is inserted, thereby preventing the cable from being retained in the guide groove. As another prior art, a structure is known in which a long groove portion that collectively accommodates power cables is provided on a metal side column of a rocker. However, all of these prior arts are independent of cable grounding.

JP-A-9-116276 JP-A-5-315775

  The electronic device disclosed herein is to satisfactorily ground the conductive coating of the cable without adding components.

  The electronic device disclosed herein includes a circuit board, a cable, a metal component, and a resin component.

  An electronic component including the first connector is mounted on the circuit board.

  The cable has a second connector that is covered with a conductive material and assembled to the first connector, and is connected to the tip.

  Further, the metal part spreads facing the circuit board, and a first opening leading to the front and back surfaces is formed.

  Furthermore, the resin component spreads facing the metal component with the metal component sandwiched between the resin component and the circuit board. The resin part is formed with a second opening that divides the wiring path of the cable and guides the cable to the first opening.

  According to the electronic device of the present disclosure, the conductive coating of the cable is satisfactorily grounded without adding any parts. Thereby, such an electronic device is efficiently developed from a cost viewpoint.

It is a perspective view of the notebook PC in a closed state. It is a perspective view of the notebook PC in an open state. It is the disassembled perspective view which removed and showed the cover unit which covers the part of the back | inner side of a keyboard of the main body apparatus upper surface. It is the elements on larger scale which showed a part of main body apparatus after removing a cover unit. It is the disassembled perspective view which showed the layer structure of the main body apparatus. It is an expansion perspective view of the same part as the wiring path of notebook PC of an embodiment of notebook PC as a comparative example.

  Hereinafter, embodiments will be described.

  FIG. 1 is a perspective view of a notebook PC in a closed state. FIG. 2 is a perspective view of the notebook PC in an open state. This notebook PC is an example of the electronic device referred to in this case.

  The notebook PC 100 includes a main body device 110 and a display device 120. The display device 120 is connected to the main body device 110 by a hinge part 130. With this notebook PC 100, the display device 120 can be opened and closed between the closed state shown in FIG. 1 and the open state shown in FIG.

  The main unit 110 includes various indicators 111, various function buttons 112, a keyboard 113, a track pad 114, and the like on the upper surface. Inside the main unit 110, a circuit board on which electronic components such as a CPU (Central Processing Unit) (not shown), which is the core of the arithmetic processing, is mounted.

  The display device 120 has a display screen 121. Various images corresponding to instructions (signals) from the main device 110 are displayed on the display screen 121.

  FIG. 3 is an exploded perspective view in which the cover unit that covers the back side portion of the keyboard on the top surface of the main device is removed. FIG. 4 is a partially enlarged perspective view showing a part of the main unit after the cover unit is removed. Further, FIG. 5 is an exploded perspective view showing the layer structure of the main unit.

  The hinge portion 130 has a cylindrical cable passage 131, and a cable 132 is inserted through the cable passage 131. The cable 132 transmits an image signal representing an image to be displayed on the display screen 121 of the display device 120. The outer periphery of the cable 132 is covered with a conductive cloth in order to suppress radiation noise accompanying transmission of the image signal.

  As shown in FIG. 5, the main unit 110 has a circuit board 140, a metal plate 150, and a resin plate 160 arranged in order from the lower layer side, and a keyboard 113 and a cover unit 170 (see FIG. 3) arranged thereon. Yes. The main unit 110 also includes a resin lower cover (not shown) on the lower layer side of the circuit board 140 shown in FIG. 5, and the circuit board 140 and the metal plate 150 are placed in an internal space formed by the resin plate 160 and the lower cover. Contained.

  A large number of electronic components including the connector 141 are mounted on the circuit board 140. FIG. 5 shows a connector 133 that mates with the connector 141 on the circuit board 140. FIG. 5 is an exploded perspective view, and the connector 133 is shown as being separated from the cable 132 in FIG. 5, but is physically connected to the tip of the cable 132.

  The metal plate 150 is a metal component that spreads facing the circuit board 140 and plays a role as a shield member of the circuit board 140. The metal plate 150 is provided with a number of openings leading to the front and back surfaces. One of the openings serves as a passage for connecting the cable 132 and the connector 133 to the connector 141 on the circuit board 140.

  The resin plate 160 is a resin component that spreads facing the metal plate 150 with the metal plate 150 sandwiched between the resin substrate 160 and the circuit board 140. The resin plate 160 has an opening 161 that partitions the wiring path of the cable 132. The wiring path by the opening 161 is connected to the opening formed in the metal plate 150. The opening formed in the metal plate 150 is for guiding the connector 133 (see FIG. 5) at the tip of the cable 132 to the connector 141 on the circuit board 140. The opening 161 communicates with the front and back surfaces of the resin plate 160. Therefore, the metal plate 150 spreading under the resin plate 160 appears in the opening 161.

  The cable 132 that is also arranged in the display device 120 and exits from the cable passage 131 toward the main body device 110 passes through the wiring path defined by the opening 161 of the resin plate 160 and passes through the opening of the metal plate 150. The connector 133 at the tip of the cable 132 is coupled to the connector 141 on the circuit board 140.

  Since the metal plate 150 is looking into this wiring path, the wiring path is clearly visible due to the difference between the color of the metal plate 150 and the color of the resin plate 160. For this reason, assembly work is made efficient and mistakes are reduced.

  The resin plate 160 has a hook 162 that is erected with respect to the metal plate 150 at the edge of the opening 161 that divides the wiring path, and whose tip end is bent in a hook shape toward the wiring path. A cable 132 is hooked on the hook 162 to pass through the wiring path.

  The gap between the hook 162 bent in a hook shape and the metal plate 150 is made slightly narrower than the diameter of the cable 132. For this reason, the cable 132 hooked on the hook 162 is pressed against the metal plate 150. This ensures that the conductive cloth covering the cable 132 contacts the metal plate 150, and the conductive cloth of the cable 132 is grounded.

  Further, the cover unit 170 shown in FIG. 3 is put on the wiring path. The cable 132 passing through the wiring path is pressed against the metal plate 150 by the cover unit 170 over almost the entire length of the wiring path. The grounding of the conductive cloth covering the cable 132 is further ensured even when the cover unit 170 is pressed against the metal plate 150.

  FIG. 6 is an enlarged perspective view of a portion similar to the wiring path of the notebook PC of the above-described embodiment of the notebook PC as a comparative example.

  In the case of the notebook PC as a comparative example shown in FIG. 6, the cable 132 ′ is pressed against the conductive gasket 181 at a position where it exits from the cylindrical cable passage 131 ′. The gasket 181 is connected to the metal part 182 at the ground potential by an aluminum tape 183. Conventionally, as an example, the conductive coating of the cable is grounded by the structure shown in FIG.

  In the case of the structure shown in FIG. 6, parts such as a gasket 181 and an aluminum tape 183 are necessary only for grounding the cable covering. Also, the number of man-hours for assembling these parts is required, and these parts affect the cost of the notebook PC.

  On the other hand, in the above-described embodiment, the shape of a metal plate or a resin plate that is originally required is devised, and the conductive cloth of the cable 132 is reliably grounded without requiring parts only for grounding. Thereby, the cost of the notebook PC is suppressed.

100 notebook PC
DESCRIPTION OF SYMBOLS 110 Main body apparatus 113 Keyboard 120 Display apparatus 121 Display screen 130 Hinge part 131,131 'Cable passageway 132,132' Cable 133,141 Connector 140 Circuit board 150 Metal plate 160 Resin plate 161 Opening 162 Hook 170 Cover unit 181 Gasket 182 Metal part 183 aluminum tape

Claims (4)

A circuit board on which electronic components including the first connector are mounted;
A cable in which a second connector that is covered with a conductive material and is assembled with the first connector is connected to the tip;
A metal part having a first opening extending to face the circuit board and leading to the front and back surfaces;
The metal part is sandwiched between the circuit board and the metal part so as to face and spread. The cable wiring path is partitioned and the cable is led to the first opening. An electronic device comprising: a resin part having a second opening formed through the metal part.   The resin part has a hook that stands on the metal part at an edge that divides the second opening, a tip part that stands up bends in a hook shape, and sandwiches the cable between the metal part and the metal part. The electronic device according to claim 1.   The resin component and the cable are sandwiched between the metal component and the resin component is spread to face the metal component, and the cover member presses the cable against the metal component viewed through the wiring path. The electronic device according to claim 1 or 2. A main body device including the circuit board, the metal component, and the resin component;
A display device having a display screen and hinged to the main body device so as to be openable and closable;
The electronic device according to claim 1, wherein the cable is a cable that electrically connects the display device and the main body device.

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