JP2010016123A - Arrangement structure of wiring body, mobile phone, and wiring component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simple arrangement structure of a wiring body having waterproofness, and to provide a mobile phone using the arrangement structure, and an a wiring component. <P>SOLUTION: An arrangement structure of a wiring body includes a heat shrinkage tube 5, and a wiring body insertion opening 11h provided in the housing 11 wherein a wiring body 3 passes through the heat shrinkage tube and the wiring body insertion opening, the heat shrinkage tube 5 is contracted and stuck to the wiring body, and the heat shrinkage tube thus stuck or a packing 17 which is stopped at the heat shrinkage tube is attached to the wiring body insertion opening 11h to come into contact therewith thus imparting waterproofness. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an arrangement structure of a wiring body, a mobile phone, and a wiring component, and more specifically, a flexible printed circuit board (FPC), a coaxial cable, and the like so as not to impair the waterproof property of a casing such as a mobile phone. The present invention relates to an arrangement structure of a wiring body that can be provided in a mobile phone, a mobile phone using the wiring body, and a wiring component.

A cellular phone, a notebook personal computer, or the like has a structure in which a wiring body such as an FPC is connected to an input key board in a housing. In recent years, there has been a trend to demand waterproofness for these notebook PCs, mobile phones, etc. Especially, as mobile phones are used in pools, bathrooms, etc., the wiring body insertion port provided in the housing has increased. This part is required to be waterproof. For this purpose, a method has been proposed in which liquid rubber is applied so as to go around the FPC, and the applied liquid rubber is cured with ultraviolet rays or the like to use FPC with a gasket (Patent Document 1). Thereby, waterproofness can be obtained by the gasket while passing the FPC through the through hole opened in the housing. In addition, an arrangement structure of conducting wires is proposed in which the terminal fixing member is attached so as to be in close contact with the wiring insertion port of the housing, and penetrates through the terminal fixing member while maintaining water tightness (Patent Document 2). In the case of this structure, a watertight structure is arranged in two places, between the conductor / terminal fixing member and between the terminal fixing member / wiring insertion port, to secure a removable waterproof conductor arrangement structure. Yes.
Japanese Patent Application Laid-Open No. 2004-289943 JP 2006-216687 A

  In the case of the above-described method using liquid rubber, however, a technique for accurately applying liquid rubber in accordance with the size of the through hole of the casing and the FPC is required. Further, if a gap is formed between the FPC and the liquid rubber, the waterproof property is impaired. Therefore, a technique for applying the liquid rubber without a gap between the FPC and the liquid rubber is required. Furthermore, an apparatus such as ultraviolet irradiation for curing the liquid rubber is required. Therefore, even if it looks relatively simple, it is not easy to obtain a highly accurate shape of liquid rubber having high fluidity when it is actually the stage to form a waterproof FPC arrangement structure. The introduction of a device for solving this will increase the manufacturing cost. In addition, the waterproof conductive wire arrangement structure using the terminal fixing member is complicated in structure, requires a lot of man-hours at the time of manufacture, and requires a large number of parts. Further, the axial length of the terminal fixing component exceeds the thickness of the casing, which increases the bulk and goes against the trend of miniaturization and simplification.

  The present invention provides a wiring body arrangement structure that is used for a wiring body insertion port of a housing and has a waterproof property and has a simple structure, a mobile phone using the arrangement structure, and a wiring component. Objective.

  The arrangement structure of the wiring body of the present invention is provided to insert the wiring body into the housing while maintaining waterproofness. This wiring body arrangement structure includes a wiring body, a housing, a heat shrinkable tube, and a wiring body insertion port provided in the housing, and the wiring body passes through the heat shrinkable tube and the wiring body insertion port. The heat shrinkable tube is contracted and adhered to the wiring body. The heat-shrinkable tube or the elastic member retained on the heat-shrinkable tube is attached to the wiring body insertion port and is in contact with the wiring body insertion port so as to be waterproof.

  With the above structure, the wiring body can be inserted into the housing while obtaining waterproofness, so that a wiring structure having a simple structure can be obtained. Pressure is generated between the heat-shrinkable tube or elastic body and the wiring body insertion port, and this pressure is caused by the elastic deformation of the heat-shrinkable tube or elastic body, and it is waterproof with a simple structure. It is a group that can.

  The outer peripheral surface of the heat-shrinkable tube that is in close contact with the wiring body and the inner peripheral surface of the wiring body insertion port exert pressure on each other so as to make a watertight contact. As a result, an arrangement structure with a small number of parts and a simple structure can be manufactured very easily, and a mold is not required. Therefore, an inexpensive and waterproof arrangement structure can be obtained. Here, it goes without saying that the concavo-convex structure for ensuring water tightness may be circulated around the outer peripheral surface of the heat-shrinkable tube and / or the inner peripheral surface of the wiring body insertion port.

  The above-mentioned elastic member is used as a packing, and the heat shrinkable tube that is in close contact with the wiring body forms a retaining portion of the packing so that the packing and the wiring body insertion port are in contact with each other. Thus, it is possible to obtain a highly waterproof wiring structure with a simple structure.

  An outer surface shape-forming base material that is in close contact with the wiring body may be interposed between the heat-shrinkable tube and the wiring body, and the heat-shrinkable tube may be contracted and adhered to the outer surface shape-forming base material. This makes it possible to easily form a preferable outer shape for improving water tightness by combining the heat shrinkable tube and the outer shape forming base material. The outer surface shape forming substrate (1) plays the role of a packing pedestal on the heat shrinkable tube also when (1) the outer peripheral surface of the heat shrinkable tube is brought into direct contact with the inner peripheral surface of the wiring body insertion port. Can also be used. In the case of (1), as described above, the concavo-convex structure may be circulated on the outer peripheral surface of the heat-shrinkable tube and / or the inner peripheral surface of the wiring body insertion port. Further, (3) it can also be used to alleviate the difficulty of forming a watertight structure due to a flat shape such as FPC. The outer surface shape forming substrate may be adhered to the wiring body by any method as long as waterproofness is obtained. For example, an adhesive may be used, or an outer surface shape forming base material itself may be an elastic body and may be in close contact with the wiring body with its elastic force.

  You may form said outer surface shape formation base material with the base layer heat shrinkable tube which is another heat shrinkable tube different from said heat shrinkable tube. Thereby, a waterproof wiring body arrangement structure can be easily obtained without using a mold or the like. A base layer heat-shrinkable tube can be used for any of the above (1) to (3).

  Pressure is generated between the heat-shrinkable tube and the wiring body insertion port, and the rate of change before and after mounting of the thickness of the heat-shrinkable tube at the portion where the pressure is generated ((thickness before mounting−thickness after mounting) / thickness before mounting) Can be made 5 to 40%. As a result, a pressure sufficient to ensure water tightness can be generated between the heat-shrinkable tube and the wiring body insertion port. Note that the heat-shrinkable tube before and after mounting is of course after heat-shrinking. If the rate of change is less than 5%, sufficient watertightness cannot be ensured, and if it exceeds 40%, stress on the wiring body increases and deformation occurs, resulting in a gap between the wiring body and the heat shrinkable tube. Inconvenience such as the occurrence of. Here, in the case where the heat shrinkable tube includes a base layer heat shrinkable tube as an outer surface shape forming substrate, the heat shrinkable tube may be the base layer heat shrinkable tube, or the heat shrinkable tube that shrinks and adheres to the base layer heat shrinkable tube. It may be a tube or both.

  You may adhere | attach said heat shrinkable tube and the other party which this heat shrinkable tube shrink | contracted and contact | adhered with the adhesive agent. Thereby, the waterproofness or watertightness of the heat-shrinkable tube and the wiring body or the outer surface shape forming member can be improved more reliably. As described above, when the heat shrinkable tube includes a base layer heat shrinkable tube as an outer surface shape forming base material, the heat shrinkable tube may be the base layer heat shrinkable tube, or shrink and adhere to the base layer heat shrinkable tube. It may be a heat-shrinkable tube, or both of them.

  It can be set as the structure where the uneven | corrugated | grooved part is circulated in at least 1 of the other party surface which said heat shrinkable tube contact | adheres, the said contact surface of the heat shrinkable tube, and the outer peripheral surface of the heat shrinkable tube. Thereby, waterproofness can be improved with a simple structure. Moreover, when using an adhesive agent, an uneven | corrugated | grooved part functions as a retention part or a retention part of an adhesive agent, and it becomes easy to arrange | position an adhesive agent. Again, when the heat shrinkable tube includes a base layer heat shrinkable tube as an outer surface shape forming substrate, the heat shrinkable tube may be the base layer heat shrinkable tube, or shrink and adhere to the base layer heat shrinkable tube. It may be a heat-shrinkable tube, or both of them.

  An uneven part can be made to circulate in the inner peripheral surface of said wiring body insertion port. This makes it possible to circulate the concavo-convex portion having a relatively high accuracy in a normal casing by mold injection molding, and to easily improve water tightness.

  A cellular phone according to the present invention includes any one of the above-described wiring structure. This makes it possible to obtain a mobile phone with excellent waterproofness using easily available and inexpensive parts.

The wiring component of the present invention is a wiring component comprising a wiring body and a heat shrinkable tube,
The wiring body passes through the heat-shrinkable tube, and the heat-shrinkable tube shrinks and is in close contact with the wiring body. With this configuration, it is possible to easily provide wiring to the housing while maintaining waterproofness by simply attaching the heat shrinkable tube portion of the wiring component to the wiring body insertion port. A mold is not necessary for manufacturing the wiring component, and the arrangement structure of the wiring body can be provided inexpensively and promptly.

  In the above-described wiring component, the heat shrinkable tube that is in close contact with the wiring body can form a retaining portion of the packing, and the packing is attached to the retaining portion. As a result, a wiring component with improved prevention can be obtained.

  An outer surface shape forming base material that is in close contact with the wiring body may be interposed between the heat shrinkable tube and the wiring body, and the heat shrinkable tube may be contracted and adhered to the outer surface shape forming base material. In such a wiring component, it is possible to easily form a preferable outer surface shape for improving water tightness by combining the heat shrinkable tube and the outer surface shape forming base material. The outer surface shape forming substrate (1) plays the role of a packing pedestal on the heat shrinkable tube also when (1) the outer peripheral surface of the heat shrinkable tube is brought into direct contact with the inner peripheral surface of the wiring body insertion port. Can also be used. In the case of (1), a concavo-convex structure for improving water tightness may be circulated around the outer peripheral surface of the heat shrinkable tube.

  The above heat-shrinkable tube and the partner to which the heat-shrinkable tube shrinks and adheres can be bonded with an adhesive. By using this wiring component, the waterproofness between the heat shrinkable tube and the wiring body or the outer surface shape forming member can be improved more reliably.

  The concavo-convex portion can be circulated on at least one of the partner surface to which the heat shrinkable tube shrinks and adheres, the close contact surface of the heat shrinkable tube, and the outer peripheral surface of the heat shrinkable tube. Thereby, waterproofness can be improved with a simple structure. Moreover, when using an adhesive agent, an uneven | corrugated | grooved part functions as a retention part or a retention part of an adhesive agent, and it becomes easy to arrange | position an adhesive agent.

  The wiring body can have electrode portions at both ends, and heat shrink tubes can be provided at two locations on the wiring body. Accordingly, when the wiring body is connected between the two housings while ensuring waterproofness, the wiring body can be easily inserted.

  According to the present invention, it is possible to provide a wiring structure having a simple structure and having a waterproof structure while passing through the insertion opening of the housing, a mobile phone using the wiring structure, and a wiring component.

(Embodiment 1)
FIG. 1 is a diagram showing a wiring body arrangement structure 10 according to Embodiment 1 of the present invention. In FIG. 1, the housing 11 is provided with a wiring body insertion port 11h. The wiring body insertion port 11h is provided with a wiring body arrangement structure 10 shown in FIG. A heat-shrinkable tube 5 is contracted and adhered to the wiring body 3, and the adhered heat-shrinkable tube 5 has a packing function. The wiring body 3 passes through the wiring body insertion port 11h with the outer peripheral surface of the heat-shrinkable tube 5 in close contact with the inner circumferential surface of the wiring body insertion port 11h in a watertight manner. The wiring body in FIG. 1 is a flexible printed circuit board (FPC). An electrode portion 3a is provided at the tip of the FPC 3, and is electrically connected to an electrode such as a connector. In FIG. 1, the electrode portion at the other end of the FPC 3 is not visible in the housing 11, but is connected to a connector or the like such as a display unit substrate inside the housing 11. As shown in FIG. 2, an adhesive 7 is used between the heat-shrinkable tube 5 and the wiring portion 3b of the wiring body 3 in order to improve water resistance, water tightness (sealing property), stable stationary, and the like. Good.

  3 and 4 are diagrams showing a wiring component 20 used in the FPC arrangement structure shown in FIGS. In FIG. 3, the wiring body 3 is an FPC. In order to wire the wiring body 3 between the two housings while obtaining waterproofness at the wiring body insertion port of each housing, the heat-shrinkable tubes 5 that are in close contact with the two locations are disposed. Further, FIG. 4 shows the wiring body 3 that is coated with an insulating resin layer on a coaxial wire or a thin conducting wire that is bound (each thin conducting wire is covered with insulation). In this case, since the cross section of the wiring body 3 is round, when the heat shrinkable tube 5 has a packing function, it is easy to form a watertight contact. The cross-sectional shape of the through hole of the wiring body insertion port 11h is not limited to a circle, but may be any shape. In the case of a circular shape, the inner circumferential surface of the wiring body insertion port 11h and the outer circumferential surface of the heat shrinkable tube 5 The surface pressure acting between them is evenly distributed and easy to control. However, in some cases, it is very preferable to use the FPC as the wiring body 3 from the viewpoint other than prevention. In such a case, the cross-sectional shape of the wiring body insertion port 11h is not a circle, and the cross-sectional width of the FPC, for example. A flat oval shape whose direction is the major axis direction can be obtained. Moreover, the outer surface shape formation base material demonstrated after this can be used. When a coaxial line is used as shown in FIG. 4, usually, both ends are connected to a printed circuit board 3d to form an electrode portion 3a.

Next, a manufacturing method of the wiring body arrangement structure 10 shown in FIG. 1 will be described.
(Wiring parts): In a diameter-expanded state (commercial state) so that the heat-shrinkable tube in a state of being heat-shrinked and in close contact with the shape of the wiring body insertion port 11h provided in the housing 11 is waterproof and fits. Select heat shrink tubing. When the heat-shrinkable tube 5 is attached to the wiring body insertion port 11h to obtain watertightness, the thickness of the heat-shrinkable tube after heat shrinkage is 5 of the thickness in the state of being inserted and attached to the wiring body insertion port 11h. % To 40% greater. The wiring body 3 (FPC, coaxial line, etc.) is passed through the heat shrinkable tube 5, and the heat shrinkable tube 5 is heated and contracted at a predetermined location. The temperature of the heat shrink treatment may be any number of times as long as the heat shrink tube 5 is heat shrunk, but is usually about 140 ° C. The heat shrinking treatment is performed, for example, by passing through a constant temperature furnace maintained at 140 ° C. or by holding in a constant temperature furnace.
(Heat-shrinkable tube): The heat-shrinkable tube 5 is a tube made of a synthetic resin produced by extrusion molding or the like, and after being subjected to a crosslinking treatment by electron beam irradiation to impart heat-shrinkability, is expanded in the radial direction under heating. Then, it is manufactured by quenching in the expanded state. As described above, the cross-linking treatment can use chemical cross-linking, water cross-linking or the like in addition to electron beam irradiation. Since the synthetic resin is required to have water resistance, insulation, etc., a polyolefin-based resin is preferably used. Examples of the polyolefin resin include low density polyethylene (LDPE), linear low density polyethylene (L-LDPE), and very low density polyethylene (VLDPE). In addition, in order to impart flexibility to the above polyolefin-based resin, a monomer other than the α-olefin can be introduced. Copolymers such as ethylene-propylene-diene copolymer (EPDM), ethylene-methyl acrylate copolymer (EMA), ethylene-ethyl acrylate copolymer (EEA), and ethylene-vinyl acetate copolymer (EVA) are also available. It can be preferably used.
The dimensions of the heat shrinkable tube will be described. In the case of a nominal inner diameter of 5 mm before heat shrinkage, that is, in a state where the diameter is expanded, normally, the inner diameter is slightly more than 5 mm, for example, in the range of 5.60 ± 0.30. And after shrinking, it shrinks to an inner diameter of 2.90 mm level, for example. As for the wall thickness, when the nominal thickness is 0.20 mm before shrinkage, the thickness becomes 0.4 mm ± 010 mm after shrinkage.
As the heat-shrinkable tube, a commercially available product such as Sumitube (registered trademark) of Sumitomo Electric Fine Polymer Co., Ltd. can be used.
(Adhesive): Any adhesive can be used as long as it adheres to the casing and the insulating resin. However, an adhesive that is hot-melted during the heat shrink treatment is used as the inner layer of the polyolefin resin of the heat shrink tube. It is good to arrange in. In this case, the heat shrinkable tube has a multilayer structure of a polyolefin resin and an adhesive layer.
(Housing): Lightweight metals such as magnesium alloy, aluminum alloy, and titanium alloy, and those coated with light weight metals, especially those coated with fluororesin, are used for the housing. Further, an insulating resin is coated on the FPC or the like. The casing 11 is manufactured by resin injection molding or the like. At that time, a wiring body insertion port 11h is provided. In order to improve the water tightness with the outer peripheral surface of the heat shrinkable tube 5 on the inner peripheral surface of the wiring body insertion port 11h, an uneven portion may be circulated (see 41t and 43t in FIG. 6).

  FIG. 5 is a perspective view showing a cellular phone or cellular phone 50 including the wiring body arrangement structure 10 shown in FIGS. 1 and 2. FIG. 6 is a cross-sectional view of the mobile phone 50. In FIG. 5, the mobile phone 50 includes an input unit 54 and a display unit 53 connected to the input unit 54 with a hinge 42 interposed therebetween. The input unit 54 and the display unit 53 can be opened and closed by rotating about the hinge 42 as an axis. The display unit 53 is provided with a display screen 56 using an LCD (Liquid Crystal Display). A speaker 58 is provided above the display screen 56 of the display unit 53 (in a direction away from the hinge 42). The input unit 54 has a plurality of input keys (hereinafter simply referred to as “keys”) 57 for inputting symbols such as telephone numbers and alphabets. In addition, a microphone 59 is disposed at the end opposite to the hinge 42 as viewed from the input unit 54.

  The mobile phone 50 is provided with a first housing 41 located on the input unit 54 and a second housing 43 located on the display unit 53, and a hinge unit 42 is provided therebetween. As shown in FIG. 6, the first casing 41 accommodates the input key substrate 31 of the mobile phone, and the second casing 43 accommodates the display unit substrate 32. Information input on the input key substrate 31 is delivered to the display unit substrate 32 via the FPC 3. The wiring portion 3b of the FPC 3 is preferably arranged in the first and second casings 41 and 43 by making it long and turning around the hinge shaft 42a. In the space in which the input key board 31 of the first housing 41 is housed, the portion other than the FPC insertion port 11h is substantially sealed. In addition, in the space in which the display unit substrate 32 of the second housing 43 is accommodated, portions other than the FPC insertion port 11h are substantially sealed. In FIG. 5, the heat shrinkable tube 5 that is contracted and adhered to the FPC 3 is attached to the FPC insertion port 11 h of the first housing 41. In order to improve the stability of the close contact between the FPC 3 and the heat shrinkable tube 5, it is preferable to dispose the adhesive 7 between the FPC 3 and the heat shrinkable tube 5 that is shrinking. The arrangement of the adhesive 7 can ensure waterproofness more firmly.

  As described above, the inner peripheral surface of the FPC insertion port 41h and the outer peripheral surface of the heat-shrinkable tube 5 are in watertight contact. In order to improve the watertightness of the contact between the two, the concavo-convex structure 41t is made to circulate in the wiring body insertion port 41h of the housing 41. Thereby, since the outer peripheral surface of the heat shrinkable tube 5 and the convex portion of the concavo-convex structure exert higher pressures on each other, the waterproof property can be further strengthened. An end of the FPC 3 in the first housing 41 is connected to the connector 21 via the electrode portion 3a. Moreover, the end in the 2nd housing | casing 43 of FPC3 is connected to the connector 22 through the electrode part 3a. Also in the FPC insertion port 43h of the second housing 43, a waterproof structure similar to the heat shrinkable tube 5 provided in the insertion port 41h of the first housing 41 is provided.

  As a result, it is possible to arrange the wiring body while ensuring waterproofness without increasing the number of parts. As a result, the two casings 41 and 43 that are substantially sealed except for the insertion ports 41h and 43h are provided with a waterproof wiring body arrangement structure at the insertion port 41h and the like, and are communicated by the wiring 3. . As a result, the mobile phone 50 can be used in a bath or a pool. Since only the heat shrinkable tube 5 is used, it is not necessary to use a mold. For this reason, it is possible to provide a cheap waterproof structure that can quickly respond to a mobile phone that frequently repeats model upgrades. As described above, the arrangement structure of the wiring body in this embodiment is important for a mobile phone, but is not limited to a mobile phone and can be used for other electrical products.

(Embodiment 2)
7A and 7B are diagrams showing the wiring component 20 according to the second embodiment of the present invention, in which FIG. 7A is a front view seen along the longitudinal direction of the FPC 3, and FIG. 7B is a partially enlarged view thereof. (C) is sectional drawing which follows the VIIC-VIIC line to (a). The present embodiment is characterized in that FPC is used for the wiring body, and obstructive factors due to the flat shape of the FPC with respect to the waterproof structure by the heat shrinkable tube are excluded. The obstruction factors resulting from the flat shape of the FPC are removed by the outer surface shape forming substrate 2 as shown in FIGS. In FIG. 7A, the outer surface shape forming base material 2 having a gap for accommodating the FPC wiring portion 3b is disposed, and the heat shrinkable tube 5 is contracted and adhered to the outside thereof. The outer surface shape forming base material 2 is generally cylindrical, but is vertically divided in half on the boundary of the storage portion that stores the wiring portion 3b. Then, as shown in FIGS. 7A, 7B, and 7C, the adhesive portion 7 is bonded so that the outer surface becomes a cylindrical surface with the wiring portion 3b interposed therebetween. For this reason, it becomes easy to thermally bond the heat bonding tube 5 to the outer surface of the outer surface shape forming substrate 2. Further, since the thickness after heat shrinkage becomes uniform, it becomes easy to make watertight contact over the entire circumference of the wiring body insertion port 11h. As a matter of course, an adhesive having high waterproofness, water resistance, adhesion, and durability is used.

  In the above case, the outer shape forming base material 2 has been described with respect to an example in which the shape is relatively well arranged. However, if the disadvantage of the flat FPC 3 with respect to the waterproof structure can be alleviated, the strictness of the shape is not required at all. is there. In FIG. 7, an accommodation groove for accommodating the FPC 3 is provided, but this is not necessary. For example, as shown in FIG. 8, another base layer heat shrinkable tube can be used as the outer surface shape forming member 2. The idea is not to suddenly change the flat cross-sectional shape of the FPC 3 so as to have a smooth outer shape with a single heat shrinkable tube by arranging the heat shrinkable tubes in an overlapping manner (the base layer as the outer surface shape forming substrate) The heat shrinkable tube 2 / heat shrinkable tube 5) as the packing is adjusted to the wiring body insertion port 11h having an elliptical cross section, for example. Accordingly, a waterproof wiring body arrangement structure can be obtained at reasonable cost. The description of the polyolefin-based material, dimensions, and commercially available products described in the first embodiment can be applied to the base layer heat-shrinkable tube 2 as it is.

  In the present embodiment, the wiring body is intended for a flat FPC, and in order to overcome the drawback of difficulty in forming a waterproof structure by the heat shrinkable tube 5 due to the flat shape, the outer shape forming base is used. Material 2 is used. FIG. 9 is a perspective view of the wiring component shown in FIGS. 7A to 7C, and the FPC 3 is used for the wiring body. And said (outer surface shape formation base material 2 or base layer heat-shrinkable tube 2 / heat-shrinkable tube 5) is arrange | positioned in the position corresponding to the wiring body insertion port of two housings | casings. The shape of the outer surface shape forming substrate 5 is not only a smooth cylindrical surface, but also a convex structure as shown in FIG. 10 in order to realize a highly water-tight contact with the heat shrinkable tube 5 with the wiring body insertion port 11h. May be circulated.

  FIG. 11 is a cross-sectional view showing the FPC arrangement structure of the mobile phone 50 using the wiring component 20 shown in FIGS. The mobile phone 50 is provided with a first housing 41 located on the input unit 54 and a second housing 43 located on the display unit 53, and a hinge unit 42 is provided therebetween. As shown in FIG. 9, the input key substrate 31 of the mobile phone is accommodated in the first casing 41, and the display unit substrate 32 is accommodated in the second casing 43. Information input on the input key substrate 31 is delivered to the display unit substrate 32 via the FPC 3. The wiring portion 3b of the FPC 3 is preferably arranged in the first and second casings 41 and 43 by making it long and turning around the hinge shaft 42a. In the space in which the input key board 31 of the first housing 41 is housed, the portion other than the FPC insertion port 11h is substantially sealed. In addition, in the space in which the display unit substrate 32 of the second housing 43 is accommodated, portions other than the FPC insertion port 11h are substantially sealed. In FIG. 9, the FPC insertion opening 11 h of the first housing 41 has an outer surface shape forming substrate 2 that is adhered and fixed to the FPC 3 while housing the FPC 3, and a heat shrinkable tube 5 that contracts and adheres to the outer surface. Is installed. The heat-shrinkable tube 5 has a uniform thickness over its entire circumference, and easily functions reliably as a packing.

  As described above, in order to improve the watertightness of the contact between the inner peripheral surface of the FPC insertion port 11h and the outer peripheral surface of the heat-shrinkable tube 5, the concavo-convex structure 11t is circulated around the wiring body insertion port 11h of the housing 11. Also good. Thereby, since the outer peripheral surface of the heat shrinkable tube 5 and the convex portion of the concavo-convex structure 11t exert a higher pressure on each other, the waterproof property can be further strengthened. An end of the FPC 3 in the first housing 41 is connected to the connector 21 via the electrode portion 3a. Moreover, the end in the 2nd housing | casing 43 of FPC3 is connected to the connector 22 through the electrode part 3a. Also in the FPC insertion port 11h of the second housing 43, a waterproof structure similar to the heat shrinkable tube 5 provided in the insertion port 11h of the first housing 41 is provided.

  Thereby, it is possible to arrange the wiring body while ensuring waterproofness. As a result, the two casings 41 and 43 that are substantially sealed except for the insertion port 11 h are provided with a waterproof wiring body arrangement structure at the insertion port 11 h and are connected by the wiring 3. As a result, the mobile phone 50 can be used in a bathroom or a pool. Further, when a member that does not require strict shape is used for the outer surface shape forming substrate 2, for example, when the base layer heat shrinkable tube 2 is used, since only the heat shrinkable tube 5 is used, it is not necessary to use a mold. For this reason, it is possible to provide a cheap waterproof structure that can quickly respond to a mobile phone that frequently repeats model upgrades. As described above, the arrangement structure of the wiring body in this embodiment is important for a mobile phone, but is not limited to a mobile phone and can be used for other electrical products.

(Embodiment 3)
FIG. 12 is a diagram showing the wiring component 20 according to the third embodiment of the present invention. In FIG. 12, a coaxial line is used for the wiring body 3. In the wiring portion 3 b of the wiring body 3, there are a plurality of locations where the heat-shrinkable tube 5 contracts and adheres, and a packing 17 that is an elastic body is retained between the two heat-shrinkable tubes 5. The packing 17 has a larger outer diameter than the heat-shrinkable tube 5 that is retained so as to sandwich the packing 17. Thereby, the packing 17 can be brought into contact with the inner peripheral surface of the wiring body insertion port of the casing (not shown) to realize watertight contact. FIG. 13 is a longitudinal sectional view of the wiring component 20 shown in FIG. The packing 17 is retained between the two heat shrinkable tubes 5 with the inner diameter being in contact with the wiring portion 3b. When the packing 17 makes watertight contact, it deforms from a circular cross section to an elliptical cross section. The packing 17 is an elastic body, generates a strong elastic force by a slight deformation, and exhibits water tightness. For this purpose, the two heat shrinkable tubes 5 must be securely fixed to the wiring portion 3b. For this reason, it is desirable that the heat-shrinkable tube 5 and the wiring portion 3b are bonded with the adhesive 7.

  FIG. 14 is a diagram illustrating a first modification of the wiring component 20 illustrated in FIG. 13. In the first modification, the heat shrinkable tube 5 is disposed so as to be in contact with the inner diameter of the packing 17. Thereby, water tightness can be obtained by elastic deformation of the packing 17 and the heat shrinkable tube on the inner diameter side in contact with the inner peripheral surface of the wiring body insertion port. The dimensional tolerance of the packing 17 can be relaxed.

  FIG. 15 is a diagram illustrating a second modification of the wiring component 20 illustrated in FIG. 13. In the second modification, the heat shrinkable tube as the outer surface shape forming substrate 2 is arranged in two places on the wiring portion 3b. One heat shrinkable tube 5 is contracted and brought into close contact over the two base layer heat shrinkable tubes 2 including the wiring portion 3b. As a result, a depression is generated at the center position of one heat shrinkable tube 5, and the packing 17 is stopped in this depression. FIG. 16 is a diagram showing a third modification of the wiring component 20 shown in FIG. In the third modification, one outer surface shape forming substrate 2 having a depression at the center position is arranged in the wiring portion 3b. One heat shrinkable tube 5 is shrunk and brought into close contact with the entire outer surface shape forming substrate 2. As a result, a depression is generated at the center position of one heat shrinkable tube 5, and the packing 17 is stopped in this depression.

  FIG. 17 is a view showing a wiring component 20 of Modification 4 using an FPC for the wiring body 3 and using the packing 17. (A) is the front view seen along the longitudinal direction of the wiring part 3b, (b) is sectional drawing in alignment with a XVIIB-XVIIB line | wire. The outer surface shape forming substrate 2 may be a base layer heat-shrinkable tube or other member. Usually, since the annular packing 17 is used, it is preferable that the outer surface shape forming substrate 2 is made of a highly rigid material and the boundary is firmly bonded by the adhesive 7. In this case, since the heat-shrinkable tube 5 contracts and adheres onto the outer surface shape forming substrate 2, the strictness of the shape of the outer surface shape forming substrate 2 is relaxed, and a mold or the like may not be used. , May be used. A recess is provided in the central portion of the outer shape forming base material 2 in the longitudinal direction so that a recess is also formed at the center position of the heat-shrinkable tube 5 in close contact therewith. The packing 17 is stopped in this depression. By using the wiring component 20 shown in FIG. 17, it becomes easy to use the packing 17 while using the FPC 3.

  FIG. 18 is a cross-sectional view showing the coaxial line arrangement structure of the mobile phone 50 using the wiring component 20 shown in FIG. The mobile phone 50 is provided with a first housing 41 located on the input unit 54 and a second housing 43 located on the display unit 53, and a hinge unit 42 is provided therebetween. As shown in FIG. 18, the input key substrate 31 of the mobile phone is accommodated in the first casing 41, and the display unit substrate 32 is accommodated in the second casing 43. Information input on the input key substrate 31 is delivered to the display unit substrate 32 via the coaxial line 3. The wiring portion 3b of the coaxial wire 3 is preferably arranged in the first and second casings 41 and 43 by making it long and turning around the hinge shaft 42a. In the space in which the input key board 31 of the first casing 41 is housed, the portion other than the coaxial line insertion opening 11h is substantially sealed. In addition, in the space in which the display unit substrate 32 of the second housing 43 is accommodated, portions other than the coaxial line insertion opening 11h are substantially sealed.

  As described above, in order to improve the water tightness of the contact between the inner peripheral surface of the coaxial line insertion port 11 h and the outer peripheral surface of the heat shrinkable tube 5, the concavo-convex structure 11 t is made to circulate in the wiring body insertion port 11 h of the housing 11. May be. Thereby, since the outer peripheral surface of the heat shrinkable tube 5 and the convex portion of the concavo-convex structure 11t exert a higher pressure on each other, the waterproof property can be further strengthened. The end of the coaxial line 3 in the first housing 41 is connected to the connector 21 via the electrode portion 3a. The end of the coaxial wire 3 in the second housing 43 is connected to the connector 22 via the electrode portion 3a. The same waterproof structure as the heat-shrinkable tube 5 provided in the insertion port 11 h of the first housing 41 is also provided in the coaxial line insertion port 11 h of the second housing 43.

  Thereby, it is possible to arrange the wiring body while ensuring waterproofness. As a result, the two casings 41 and 43 that are substantially sealed except for the insertion port 11 h are provided with a waterproof wiring body arrangement structure at the insertion port 11 h and are connected by the wiring 3. As a result, the mobile phone 50 can be used in a bath or a pool. Further, since only the heat shrinkable tube 5 is used, it is not necessary to use a mold. For this reason, it is possible to provide a cheap waterproof structure that can quickly respond to a mobile phone that frequently repeats model upgrades. As described above, the arrangement structure of the wiring body in this embodiment is important for a mobile phone, but is not limited to a mobile phone and can be used for other electrical products.

  Although the embodiments and examples of the present invention have been described above, the embodiments and examples of the present invention disclosed above are merely examples, and the scope of the present invention is the implementation of these inventions. It is not limited to the form. The scope of the present invention is indicated by the description of the scope of claims, and further includes meanings equivalent to the description of the scope of claims and all modifications within the scope.

  INDUSTRIAL APPLICABILITY The present invention can quickly and inexpensively provide an arrangement structure of a waterproof wiring body having a simple structure in the field of a mobile phone or the like that frequently upgrades models.

It is a figure which shows the arrangement | positioning structure of the wiring body in Embodiment 1 of this invention. It is sectional drawing of the arrangement structure of the wiring body of FIG. It is a figure which shows the wiring components used for the arrangement | positioning structure of the wiring body shown in FIG. 1 (in the case of FPC). It is a figure which shows the wiring components used for the arrangement | positioning structure of the wiring body shown in FIG. 1 (in the case of a coaxial line). It is a perspective view which shows the mobile telephone containing the arrangement | positioning structure of the wiring body shown in FIG. It is sectional drawing of the mobile telephone of FIG. It is a figure which shows the wiring components containing FPC in Embodiment 2 of this invention, (a) is the front view seen along the wiring part longitudinal direction, (b) is a partial enlarged view, (c) is It is sectional drawing. It is a figure which shows the modification of the wiring component shown in FIG. It is a perspective view which shows the wiring component shown in FIG. 7 or FIG. FIG. 8 is a cross-sectional view showing a modification of the wiring component shown in FIG. 7. It is sectional drawing which shows the mobile telephone containing the arrangement | positioning structure of the wiring body shown in FIG. It is a perspective view which shows the wiring component in Embodiment 3 of this invention. It is sectional drawing of the wiring component shown in FIG. It is sectional drawing which shows the modification 1 of the wiring component shown in FIG. It is sectional drawing which shows the modification 2 of the wiring component shown in FIG. It is sectional drawing which shows the modification 3 of the wiring component shown in FIG. It is a figure which shows the modification 4 of the wiring component shown in FIG. 13, (a) is the front view seen along the wiring longitudinal direction, (b) is sectional drawing. It is sectional drawing which shows the mobile telephone containing the arrangement | positioning structure of the wiring body shown in FIG.

Explanation of symbols

2 External shape forming base material (base layer heat shrinkable tube), 2t Concavity and convexity structure of external surface shape forming base material, 3 Wiring body (FPC), 3a Electrode portion, 3b Wiring portion (wiring), 3d Printed circuit board, 5 Heat shrinkable tube , 7 Adhesive, 10 Wiring body arrangement structure, 11 housing, 11h wiring body insertion port, 17 packing, 20 wiring parts, 21, 22 connector, 31 input key board, 32 display unit board, 41 first housing Body, 41h wiring body insertion opening, 41t wiring body insertion opening / recess structure, 42 hinge, 42a hinge shaft, 43 second housing, 43h wiring body insertion opening, 43t wiring body insertion opening / recess structure, 50 mobile phone, 53 display part, 54 input part, 56 display screen, 57 key, 58 speaker, 59 microphone.

Claims (16)

An arrangement structure of the wiring body provided for inserting the wiring body into the housing while maintaining waterproofness,
A wiring body, a housing, a heat shrinkable tube,
A wiring body insertion opening provided in the housing;
The wiring body passes through the heat shrinkable tube and the wiring body insertion port,
The heat shrinkable tube is in close contact with the wiring body,
The close contact heat shrinkable tube or the elastic member retained in the heat shrinkable tube is attached to the wiring body insertion port and is in contact with the wiring body insertion port so as to be waterproof. Arrangement structure of wiring body.   The outer peripheral surface of the heat-shrinkable tube that is in close contact with the wiring body and the inner peripheral surface of the wiring body insertion port exert a pressure on each other to make a watertight contact. Wiring body arrangement structure.   The heat-shrinkable tube that is in close contact with the wiring body forms a retaining portion of the packing, and the packing and the wiring body insertion port are in contact with each other. Arrangement structure of wiring body.   Between the heat shrinkable tube and the wiring body, an outer surface shape forming base material that is in close contact with the wiring body is interposed, and the heat shrinkable tube shrinks and adheres to the outer surface shape forming base material. The arrangement structure of the wiring body according to any one of claims 1 to 3.   5. The wiring body arrangement structure according to claim 4, wherein the outer surface shape forming substrate is formed by a base layer heat shrinkable tube which is a different heat shrinkable tube from the heat shrinkable tube.   Pressure is generated between the heat-shrinkable tube and the wiring body insertion port, and the rate of change of the thickness of the heat-shrinkable tube at the portion where the pressure is generated before and after mounting ((thickness before mounting−thickness after mounting) / thickness before mounting) The arrangement structure of the wiring body according to any one of claims 1 to 5, wherein 5 is 40%.   The arrangement of the wiring body according to any one of claims 1 to 6, wherein the heat-shrinkable tube and the partner to which the heat-shrinkable tube shrinks and adheres are adhered with an adhesive. Construction.   An uneven portion is circulated around at least one of the counterpart surface on which the heat shrinkable tube shrinks and adheres, the close contact surface of the heat shrinkable tube, and the outer peripheral surface of the heat shrinkable tube. The arrangement structure of the wiring body according to any one of claims 1 to 7.   The arrangement structure of the wiring body according to any one of claims 1 to 8, wherein an uneven portion is circulated around an inner peripheral surface of the wiring body insertion port.   A mobile phone comprising the wiring body arrangement structure according to claim 1. A wiring component comprising a wiring body and a heat shrinkable tube,
The wiring body passes through the heat shrinkable tube,
The wiring component, wherein the heat-shrinkable tube is contracted and is in close contact with the wiring body.   The wiring component according to claim 11, wherein the heat shrinkable tube forms a retaining portion of the packing, and the packing is attached to the retaining portion.   Between the heat shrinkable tube and the wiring body, an outer surface shape forming base material that is in close contact with the wiring body is interposed, and the heat shrinkable tube shrinks and adheres to the outer surface shape forming base material. The wiring component according to claim 11 or 12.   The wiring component according to any one of claims 11 to 13, wherein the heat-shrinkable tube and the partner to which the heat-shrinkable tube shrinks and adheres are adhered with an adhesive.   An uneven portion is circulated around at least one of the counterpart surface on which the heat shrinkable tube shrinks and adheres, the close contact surface of the heat shrinkable tube, and the outer peripheral surface of the heat shrinkable tube. The wiring component according to any one of claims 11 to 14. The wiring component according to any one of claims 11 to 15, wherein the wiring body has electrode portions at both ends, and the heat shrinkable tubes are provided at two locations of the wiring body. .

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