WO2010026935A1

WO2010026935A1 - Seal structure, method of forming seal structure, wiring body, and electronic apparatus

Info

Publication number: WO2010026935A1
Application number: PCT/JP2009/065156
Authority: WO
Inventors: 隆春日; 英彦三島; 和也丸山
Original assignee: 住友電気工業株式会社
Priority date: 2008-09-03
Filing date: 2009-08-31
Publication date: 2010-03-11

Abstract

Provided are a seal structure capable of flexibly coping with a design change of a wiring member and inexpensively realizing a waterproof structure, a method of forming the seal structure, a wiring body, and an electronic apparatus utilizing the structure and the wiring body. A seal structure (15) for sealing through holes (33, 43) in housings (31, 41) into which through holes a wiring member (20) is inserted. The seal structure (15) is provided with cover bodies (C) including spacers (11) each provided to one side of each of the through holes. The cover bodies (C) secure and seal to each other the spacers (11), the wiring member (20), and the housings (31, 41).

Description

SEAL STRUCTURE, METHOD FOR FORMING SEAL STRUCTURE, WIRING BODY, AND ELECTRONIC DEVICE

The present invention relates to a sealing structure for a casing of a portable terminal, a PDA, a personal computer, etc., a method for forming the sealing structure, a wiring body, and an electronic device including the same.

Conventionally, an FPC-integrated gasket having a sealing structure for sealing a through hole provided in a casing of an electronic device such as a portable terminal is known.
1 to 3 of Patent Document 1 disclose an FPC integrated gasket formed integrally with the FPC (30) and formed in a grommet shape. The FPC integrated gasket (1) is provided with a pair of gaskets (10) made of a rubber-like elastic body. A protrusion (50) that seals the through hole (3) of the housing (2) is provided at the tip of each gasket (10). The protrusion (50) has a tapered surface (53) inclined from the cross-sectional area surface (52) larger than the diameter of the through hole (3) of the housing (2) toward the tip surface (54).

In the FPC-integrated gasket (1), when the protrusion (50) is brought into close contact with the end of the through hole (3), water intrusion into the housing (2) is prevented. In other words, the pair of gaskets (10) can transmit and receive electrical signals between circuits in each casing (2) while waterproofing the two casings (2).

Registered Utility Model No. 3127071

However, the conventional FPC integrated gasket has the following problems.
First, a mold for integrally molding the protrusion (50) and the FPC (30) is required. Therefore, a new injection mold is required every time the design of the FPC is changed, which increases the cost.
Second, since it is necessary to integrally mold with the FPC (30), the material of the rubber-like elastic body constituting the gasket (10) is limited.
Third, there may be a case where the housing and the wiring member need to be sealed in a narrow space between the two housings in the electronic device, such as a slide portion of a sliding portable terminal. In the above structure, since the height dimension of the entire gasket becomes considerably large, it is difficult to arrange in such a small gap.

An object of the present invention is to provide a seal structure or the like in an electronic device or the like that can flexibly cope with a design change of a wiring member such as an FPC and can be formed at low cost.

The seal structure of the present invention is a seal structure for sealing a through hole of a housing into which a wiring member is inserted. The seal structure includes a spacer member disposed on one side of the through hole, and includes a covering member that fixes and seals the spacer member, the wiring member, and the housing.

The gap produced by the step corresponding to the thickness of the wiring member is filled with the covering by the seal structure of the present invention. This reliably prevents the entry of water or the like from the through hole.

The covering body can be configured by providing an opening through which the wiring member is inserted in the spacer member and an adhesive layer that closes the opening while embedding a part of the wiring member. The wiring member extends from the through hole into the housing through the opening of the spacer member.

Since the spacer member is fixed to the region around the through hole of the housing, the inside of the housing can be reliably sealed. The spacer member only needs to have an opening through which the wiring member is inserted, and has a simple structure. Therefore, since the spacer member can be formed separately from the wiring member, the seal structure of the present invention can flexibly cope with a design change of the wiring member. Further, unlike Patent Document 1, it is not necessary to integrally mold with FPC or the like, so that the selection range of materials is expanded. Therefore, a waterproof structure can be realized at low cost by using a spacer member having a simple structure. If the spacer member is a thin ring or flat plate, a waterproof structure can be realized even in a narrow gap.

The covering includes a cover member that faces the spacer member with a part of the wiring member interposed therebetween, and an adhesive layer that closes a gap between the spacer member and the cover member while embedding a part of the wiring member. Can be configured. With this configuration, most of the through holes are sealed by the lid member, and the step between the wiring member and the spacer member is filled with the adhesive layer. Therefore, the inside of the housing can be reliably sealed.

You may comprise the said covering body by providing the adhesive bond layer which plugs up the opening of a spacer member while embedding a part of wiring member on a spacer member. This also provides a structure in which the wiring member and the spacer member are reliably sealed on one surface side of the spacer member. Therefore, a waterproof structure can be constructed at low cost by using a spacer member having a simpler structure without using a lid member.

The covering body may be configured to include a fixing member disposed between a region surrounding the opening of the housing and the spacer member. By attaching the fixing member on the surface of the spacer member facing the housing in advance, the spacer member can be easily attached to the housing. A double-sided waterproof tape can be adopted as the fixing member.

The adhesive layer can be made of a resin adhesive having repairability (peelability). Since the adhesive layer is made of a repairable resin adhesive, it is possible to reconnect the wiring members. Therefore, a highly practical seal structure can be obtained.

It is preferable to use a resin in which a thermosetting resin and a thermoplastic resin are mixed as the repairable resin adhesive. A thermosetting resin alone does not provide repairability and is not practical. In addition, the thermoplastic resin alone has a low adhesive strength and is not reliable. On the other hand, when the adhesive tape is used, the step due to the thickness of the wiring member is not filled. Thus, it has been found that when a certain kind of thermosetting resin and thermoplastic resin are kneaded, an adhesive layer having a repair property and high adhesion reliability can be obtained.

Specifically, one or more resins selected from the group of thermosetting resins such as epoxy resins, phenol resins, acrylic resins, urethane resins, alkyd resins, unsaturated polyester resins, polyvinyl alcohol resins, acrylic resins, There is a mixture with one or more resins selected from the group of thermoplastic resins such as phenoxy resins and urethane resins. In addition, it is preferable to add a coupling agent, an inorganic filler, a flame retardant, etc. as an additive suitably.

In the seal structure, the covering body preferably further includes a tape member that covers a region around the through hole of the housing. When the wiring member is pulled, the stress applied to the covering can be relaxed by the tape member. Therefore, the reliability of the seal structure is improved.

The method for forming the seal structure of the present invention can be performed by the following procedure. First, the wiring member is inserted through the through hole (step (a)). Next, in the region surrounding the through hole in a closed ring shape, the space between the spacer member, the wiring member, and the housing is filled with a fluid of a resin adhesive having a repair property (step (b)). Thereafter, the resin adhesive is solidified (step (c)).

In step (b), there is a method of pressing the spacer member from above after interposing the resin adhesive on at least a part of the surface where the spacer member contacts the wiring member or the casing. For example, a semi-cured film-like resin adhesive is interposed between the wiring member and the housing and fluidized by a hot press. Alternatively, a resin adhesive that is a fluid is sandwiched between the wiring member and the housing and pressed from above the lid member.

In any of the above methods, the space between the casing, the wiring member, and the spacer member is filled with the fluid of the resin adhesive. Therefore, a highly waterproof seal structure can be formed by a simple process.

A wiring body including a wiring member and a spacer member having an opening through which the wiring member is inserted, and a covering portion that seals the wiring member and the spacer member on one surface side of the spacer member; It can be made in advance. And it is preferable to attach the said wiring body so that a through-hole may be plugged up. Thereby, if the spacer member is fixed to the region around the through hole of the housing via the adhesive layer, the inside of the housing can be reliably sealed. Moreover, the seal structure can be easily formed.

The covering portion includes a lid member facing the spacer member with a part of the wiring member interposed therebetween, and an adhesive layer that embeds a part of the wiring member and closes a gap between the spacer member and the lid member. Can be configured

Further, the covering portion can be configured to include an adhesive layer that closes an opening of the spacer member while embedding a part of the wiring member.

Further, a fixing member constituting an adhesive layer can be provided in advance between the spacer member and the side opposite to the side where the adhesive layer is provided. A double-sided waterproof tape can be adopted as the fixing member. If this structure is employ | adopted, a waterproof structure can be comprised only by pressing a wiring member through an adhering member.

The electronic device of the present invention has the above-described seal structure, and can form a waterproof structure for the electronic device at a low cost. A typical example is a mobile terminal. There are portable terminals in which a display unit housing and an input unit housing are connected via a hinge part and in which a display part housing and an input part housing are connected via a slide part. The wiring body is connected to the internal circuit of each casing through the through hole of each casing from the hinge portion or the slide portion. The seal structure seals the area around the through hole of each housing. In particular, when the present invention is applied to a slide-type portable terminal having a small space, significant effects can be exhibited.

According to the seal structure, wiring body, and electronic device of the present invention, it is possible to realize a waterproof structure at low cost while flexibly responding to design changes of wiring members. Also, a waterproof structure can be provided in a thin space.

It is a perspective view which shows roughly the structure of the portable terminal which concerns on Embodiment 1 of this invention. 3 is a cross section illustrating a configuration of a connection portion through a slide portion of the mobile terminal according to Embodiment 1. 3 is a plan view of the wiring body according to Embodiment 1. FIG. FIGS. 9A to 9C are a plan view, a cross-sectional view taken along line IVb-IVb, and a cross-sectional view taken along line IVc-IVc, illustrating in detail the structure in the vicinity of the through hole of the input unit housing, respectively. (A), (b) is a top view which shows the formation procedure of a seal | sticker part. (A)-(c) are the top view of the seal part in a conventional seal structure, the sectional view in a VIb-VIb line, and the sectional view in a VIc-VIc line, in order. (A), (b) is a figure which shows the 1st modification of Embodiment 1, and a 2nd modification in order, and is sectional drawing which shows the application | coating method of a resin adhesive. (A) to (c) are respectively a plan view, a sectional view taken along line VIIIb-VIIIb, and a sectional view taken along line VIIIc-VIIIc, detailing the structure in the vicinity of the through hole of the input unit housing in the second embodiment. is there. FIG. 6 is a cross-sectional view illustrating a configuration of a connection portion through a slide portion of a mobile terminal according to a third embodiment. (A)-(c) is a top view which shows the formation procedure of the wiring body which concerns on Embodiment 3. FIG. FIGS. 9A to 9C are a plan view illustrating a structure in the vicinity of the through hole of the input unit case in detail, a cross-sectional view taken along the line XIb-XIb, and a cross-sectional view taken along the line XIc-XIc, respectively. 7 is a cross-sectional view of a seal structure according to Modification 1 of Embodiment 3. FIG. (A)-(c) is a top view which shows the formation procedure of the wiring body which concerns on the modification 2 of Embodiment 3. FIG. (A), (b) is a top view which shows the spacer member which concerns on the

modifications

3 and 4 of Embodiment 3, respectively. FIG. 10 is a perspective view schematically showing a structure of an openable portable terminal according to a fourth embodiment. It is sectional drawing which shows the structure of the connection part via the hinge part of the portable terminal which concerns on Embodiment 4. FIG.

(Embodiment 1)
FIG. 1 is a perspective view schematically showing the structure of a portable terminal (electronic device) to which the present invention is applied.
The mobile terminal 1 includes a display unit 3 for displaying various information, an input unit 4, and a slide unit 8. The display unit 3 is provided with a display device 6 using a liquid crystal display panel, a speaker, and the like. The input unit 4 is provided with input keys and a microphone. The slide unit 8 is configured by slidingly fitting an outer frame 8a provided on the display unit 3 side and an inner frame 8b provided on the input unit 4 side.

FIG. 2 is a cross-sectional view illustrating a configuration of a connection portion through the slide portion 8 of the mobile terminal 1 according to the first embodiment. FIG. 3 is a plan view of the wiring body 20.
The display unit 3 is provided with a display unit casing 31 and a display unit substrate 35 as main members. The display unit substrate 35 includes a circuit or the like for sending a display signal to the display device 6. The display unit casing 31 includes a first casing 31a and a second casing 31b that are connected to each other. A through hole 33 is provided in the first housing 31a.

The input unit 4 is provided with an input unit casing 41 and an input unit substrate 45 as main members. The input board 45 includes a circuit for controlling a signal sent from the input key. The input unit housing 41 includes a first housing 41a and a second housing 41b that are connected to each other. A through hole 43 is provided in the first housing 41a.

Further, a wiring body 20 for connecting the input substrate 45 and the display unit substrate 35 through the slide unit 8 is provided. The wiring body 20 includes an FPC 21 and

harness portions

25a and 25b provided at both ends of the FPC 21. Each

harness part

25a, 25b is connected to each board |

substrate

35, 45, and is comprised so that transmission / reception of a signal can be performed.

As shown in the partial enlarged cross-sectional view of FIG. 2, the seal portion 15 is provided in the vicinity of the through hole 33 of the display unit housing 31. The seal portion 15 is provided with a covering body C including a spacer member 11 that covers one of the through holes 33 and an adhesive layer 17 that fixes the spacer member 11 to the housing. The spacer member 11 is a flexible resin sheet. The adhesive layer 17 is composed of a resin adhesive having a repair property as described later. The structure of the seal portion 15 will be described in detail with reference to FIGS. 4 (a) to (c).

FIGS. 4A to 4C are a plan view, in detail, showing a structure in the vicinity of the through hole 43 of the input unit housing 41, a cross-sectional view taken along the line IVb-IVb, and a cross-sectional view taken along the line IVc-IVc. .

In the seal portion 15, the adhesive layer 17 includes a region between the FPC 21 and the first housing 41 a, a region between the FPC 21 and the spacer member 11, and a region between the spacer member 11 and the first housing 41 a. Is buried. That is, the adhesive layer 17 fixes the spacer member 11, the FPC 21, and the first housing 41a to each other. Moreover, the clearance gap between these is sealed and the coating body C is comprised. Note that the FPC 21 is also fixed to the first housing 41a by the second adhesive layer 17a on the back surface of the first housing 41a. The second adhesive layer 17a is not for waterproofing but for stabilizing the work of forming the seal structure.

Here, the resin adhesive constituting the adhesive layer 17 is a resin adhesive having repairability (peelability). As a repairable resin adhesive, a resin in which a thermosetting resin and a thermoplastic resin are mixed can be used.

The structure in the vicinity of the through hole 33 of the display unit casing 31 is basically the same as the structure shown in FIGS. 4A to 4C (see the enlarged sectional view of FIG. 2).

With the above structure, the inside of each

housing

31 and 41 is sealed, and entry of water and moisture into each

substrate

35 and 45 is prevented. Therefore, the portable terminal 1 according to the present embodiment has a waterproof structure that can be used in water or in a humid environment.

The FPC 21 generally has a structure including a base film on which a circuit layer is formed and a coverlay that covers the base film. Examples of the material for the base film include polyimide resin, polyester resin, and glass epoxy resin. As the material for the coverlay, the same material as that for the base film is generally used. In addition, epoxy resin, acrylic resin, polyimide resin, polyurethane resin, etc. are used.

The wiring member constituting the wiring body 20 is not limited to the FPC 21. In addition to the FPC 21, there are a rigid printed wiring board (PCB), a flat cable, and the like. With these flat wiring members, the spacer member 11 can be attached to realize a waterproof structure.

The material of the spacer member 11 includes glass epoxy resin, epoxy resin, acrylic resin, polyimide resin, polyurethane resin, and the like. In particular, the same material as the base film or coverlay of the FPC 21 can be used.

-Explanation of sealing function-
Next, the sealing function of the seal part 15 according to the present embodiment will be described.
FIG. 6 is a view showing a conventional seal structure for explaining the seal function. 6A to 6C are a plan view of the comparative seal portion 16, a cross-sectional view taken along the line VIb-VIb, and a cross-sectional view taken along the line VIc-VIc in this order. In this figure, the same members as those in FIGS. 4A to 4C are denoted by the same reference numerals and description thereof is omitted.

As shown in FIG. 6A, in the comparative seal portion 16, a seal tape 19a such as a single-sided adhesive tape is provided instead of the spacer member 11. The structure of the other members is the same. In the comparative seal portion 16, the FPC 21 is affixed to the first housing 41a by the double-sided adhesive tape 17z. The sealing tape 19a covers the FPC 21 and the double-sided adhesive tape 17z.

In the comparison seal part 16, a step is formed between the FPC 21 and the double-sided adhesive tape 17z. For this reason, the double-sided pressure-sensitive adhesive tape 17z and the seal tape 19a have a leak region Rlk that cannot be sealed at the stepped portion. As a result, the comparative seal portion 16 cannot perform a waterproof function.

On the other hand, in the seal portion 15 of the present embodiment shown in FIG. 4, the spacer member 11, the FPC 21, and the first casing 41a are strongly fastened to each other by the shrinkage force of the resin adhesive of the adhesive layer 17. A covered body C is formed. As a result, a barrier without a gap is formed around the through-hole 43, and entry of water or the like is reliably prevented.

Here, if a thermosetting resin such as an epoxy resin is used, a barrier without a leakage region can be formed. However, if a thermosetting resin is used, it is difficult to peel off, and reconnection (repair) cannot be performed. Therefore, the structure in which only the adhesive layer using the thermosetting resin is formed is not practical. On the other hand, a thermoplastic resin has a low adhesive strength and poor adhesion reliability. The inventors of the present invention have confirmed by experiments that an adhesive layer having repairability and high adhesion reliability can be obtained by using the above-described resin adhesive.

-Procedure for forming seal 15-
FIGS. 5A and 5B are plan views showing the procedure for forming the seal portion 15.
First, as shown in FIG. 5A, a resin body 17x of a resin adhesive is applied so as to surround the periphery of the through hole 43 of the first housing 41a.

Next, as shown in FIG. 5B, the FPC 21 and the spacer member 11 are attached from above the resin body 17x of the resin adhesive, and the spacer member 11 is pressed.

At this time, the resin body 17x includes, for example, the following two types.
First, the resin body 17x is a semi-cured adhesive film. In this case, the resin body 17x is sandwiched between the wiring member and the casing, and is heated and pressed from above the spacer member 11 to be fluidized.
Second, the resin body 17x is a fluid. In this case, the resin body 17x may be sandwiched between the wiring member and the housing and pressed from above the spacer member 11.
In any case, the gap between the spacer member 11, the FPC 21, and the first housing 41a is filled with the fluid of the resin adhesive.

Thereafter, the resin adhesive is solidified to form the adhesive layer 17 that fixes the spacer member 11, the FPC 21, and the first casing 41a to each other. At this time, in order to promote solidification, the substrate may be heated to a temperature that does not affect the FPC 21 or the like.

The spacer member 11, the FPC 21, and the first casing 41a are strongly fastened to each other by the shrinkage force of the resin adhesive accompanying solidification. As a result, the cover C shown in FIGS. 4A to 4C is formed, and a seal structure is formed. That is, a barrier that reliably prevents the entry of water or the like is formed around the through hole 43.

-Modification-
FIGS. 7A and 7B are cross-sectional views showing a resin adhesive application method in the first and second modifications of the first embodiment.
In the first modified example, as shown in FIG. 7A, a resin body 17 x that is a fluid of resin adhesive is applied to a part of the back surface of the FPC 21.
In the second modification, as shown in FIG. 7B, a resin body 17 x that is a fluid of resin adhesive is applied to a part of the back surface of the spacer member 11.
Thereafter, in any modification, when the spacer member 11 is pressed from above, the resin body 17x of the resin adhesive enters the gap between the spacer member 11, the FPC 21, and the first housing 41a.
In any modification, instead of the fluid, a resin body 17x made of a semi-cured adhesive film may be used and fluidized by a hot press.

Therefore, also in the first and second modified examples, the resin adhesive is solidified to obtain the seal structure shown in FIGS. 4 (a) to 4 (c).

(Embodiment 2)
FIGS. 8A to 8C are sequentially a plan view showing the structure in the vicinity of the through hole 43 of the input unit housing 41 in the second embodiment, a cross-sectional view taken along the line VIIIb-VIIIb, and a line VIIIc-VIIIc, respectively. FIG. In the figure, the same members as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. Also in the present embodiment, a seal structure provided on the slide portion 8 of the slide type mobile terminal shown in FIG. 1 will be described.

In this embodiment, in addition to each member in the first embodiment, a seal tape 19 for sealing the spacer member 11 to the housing 41a is provided.

The structure in the vicinity of the through hole 33 of the display unit housing 31 is basically the same as the structure shown in FIGS.

According to the present embodiment, since the seal tape 19 is provided in addition to the seal structure of the first embodiment, it is possible to more reliably prevent the spacer member 11 from being detached from the housing due to long-term use. it can.

(Embodiment 3)

FIG. 9 is a cross-sectional view illustrating a configuration of a connection portion through the slide portion 8 of the mobile terminal 1 according to the third embodiment. In addition, the same code | symbol is attached | subjected to the member corresponding to each member of Embodiment 1. FIG.

As shown in the partial enlarged cross-sectional view of FIG. 9, a seal structure 15 for sealing the inside of the housing is provided in the vicinity of the through hole 33 of the first housing 31a of the display unit housing 31. The seal structure 15 includes a spacer member 11 through which the FPC 21 is inserted, and a lid member 14 that covers the spacer member 11. In addition, an adhesive layer 17 is provided to fill a gap between the spacer member 11 and the lid member 14 while embedding a part of the FPC 21.

Further, the seal structure 15 is provided with a double-sided waterproof tape 13 which is a fixing member for fixing the spacer member 11 to the first housing 31a. The FPC 21, the spacer member 11, and the first housing 31 a are fixed to each other on one surface side of the spacer member 11 by the spacer member 11, the lid member 14, the adhesive layer 17, and the double-sided waterproof tape 13. A covering body C that seals and seals is formed.

10A to 10C are plan views showing a procedure for forming the wiring body 20 according to the third embodiment.
First, as shown in FIG. 10A, a spacer member 11 having two openings is prepared. Next, as shown in FIG. 10B, the FPC 21 is inserted through the opening of each spacer member 11. Thereafter, the

harness portions

25a and 25b are attached to both ends of the FPC 21, respectively. After attaching the

harness portions

25a and 25b, the spacer member 11 may be inserted.

Next, the lid member 14 attached with an adhesive sheet such as an epoxy resin is attached on the spacer member 11 and the FPC 21. When the epoxy resin or the like is caused to flow by heating, the adhesive layer 17 is formed. As shown in the partial enlarged sectional view of FIG. 10C, the adhesive layer 17 fills the gap between the spacer member 11 and the lid member 14 while burying a part of the FPC 21. Thereby, the wiring body 20 is formed. Instead of using an adhesive sheet, a liquid such as an epoxy resin may be poured into the gap between the lid member 14 and the spacer member 11.

In the wiring body 20, the cover member c 1 that seals the FPC 21, the cover member 14, and the spacer member 11 is constituted by the cover member 14 and the adhesive layer 17.
As shown in the partial enlarged cross-sectional view of FIG. 10C, the cover C is configured by attaching the double-sided waterproof tape 13 (broken line) to the other surface (back surface) of the spacer member 11 at this stage.

FIGS. 11A to 11C are a plan view showing a structure in the vicinity of the through hole 43 of the input unit housing 41 in detail, a cross-sectional view taken along the line XIb-XIb, and a cross-sectional view taken along the line XIc-XIc, respectively. . In FIG. 11A, the lid member 14 is handled as a transparent body.

As shown in FIG. 11B, the wiring body 20 shown in FIG. 10C, that is, the wiring body 20 in which the spacer member 11, the adhesive layer 17, the lid member 14, etc. are attached in advance to the FPC 21, To be inserted. And the spacer member 11 is fixed to the area | region around the through-hole 43 of the 1st housing | casing 41a with the double-sided waterproof tape 13 which is a fixing member. Thereby, the seal structure 15 for sealing the first housing 41a is formed. The FPC 21 (wiring member) extends into the first housing 41 a through the opening of the spacer member 11 and the through hole 43.

The seal structure 15 in the vicinity of the through hole 33 of the display unit casing 31 is basically the same as the structure shown in FIGS. 4A to 4C (see the enlarged cross-sectional view of FIG. 2).

With the above-described seal structure 15, the inside of each

housing

31, 41 is sealed, and entry of water and moisture into each

substrate

35, 45 is prevented. Therefore, the portable terminal 1 of the present embodiment has a waterproof structure that can be used in water or in a humid environment.

The wiring member of the wiring body 20 is not limited to the FPC 21. In addition to the FPC 21, there are a rigid printed wiring board (PCB), a flat cable, and the like. With these flat wiring members, the spacer member 11 can be attached to realize a waterproof structure.

As the resin for the adhesive layer 17, an epoxy resin, an acrylic resin, a polyimide resin, a polyurethane resin, or the like can be used. When the double-sided waterproof tape 13 is provided, the double-sided waterproof tape 13 can be repaired by peeling the double-sided waterproof tape 13, so the resin of the adhesive layer 17 does not have to be repairable.

As the material of the lid member 14, the same material as that of the spacer member 11 can be used.
Examples of the double-sided waterproof tape 13 include those obtained by applying butyl rubber, an acrylic pressure-sensitive adhesive, or the like to both surfaces of a base film such as a polyethylene warif base material, a polyester nonwoven fabric, and an aluminum foil.

However, the fixing member of the present invention is not limited to the double-sided waterproof tape, and an adhesive such as an epoxy resin, an acrylic resin, a polyimide resin, or a polyurethane resin may be used. In that case, a repairable resin adhesive similar to that in the first embodiment is used.

In the seal structure 15, the thickness of each member is as follows. The thickness of the lid member 14 is about 12.5 to 125 μm. The thickness of the spacer member 11 is about 12.5 to 125 μm. The thickness of the FPC 21 is about 50 to 1000 μm. The total thickness of the adhesive layer 17 plus the thickness of the FPC 21 is about 60 to 1500 μm. The thickness of the double-sided waterproof tape 13 is about 50 to 500 μm.

Therefore, the entire thickness of the seal structure 15 is about 135 to 2250 μm, and the structure is thin. Therefore, it can be easily provided in a place where the space is limited, such as the slide portion 8 of the sliding portable terminal.

According to the present embodiment, the following operational effects can be exhibited. The spacer member 11 has a simple structure as long as it has an opening. Therefore, since the spacer member 11 is formed separately from the FPC 21 (wiring member), it is possible to flexibly cope with a design change of the FPC 21 and the like. Further, since it is not necessary to integrally mold with the FPC 21 or the like, the selection range of materials can be expanded. Therefore, the waterproof structure can be realized at low cost by using the spacer member 11 having a simple structure.

—Modification 1 of Embodiment 3—
FIG. 12 is a cross-sectional view of the seal structure 15 according to the first modification of the first embodiment. FIG. 12 shows the seal structure 15 in a cross-section corresponding to FIG.
In addition to the structure of the third embodiment, the seal structure 15 of this modification includes a seal tape 19 (tape member) that covers the area around the through hole of the cover C and the casing.

As the sealing tape 19, for example, a so-called single-sided waterproof tape can be used. For example, there is one in which a butyl rubber, an acrylic pressure-sensitive adhesive, or the like is applied to one side of a base film such as a polyethylene base material, a polyester nonwoven fabric, or an aluminum foil.

This modification improves not only the waterproof function but also the reliability of the seal structure 15. That is, when tensile stress or the like is applied to the FPC 21, it is possible to reliably prevent the adhesive layer 17 and the lid member 14 (covering body C) from being peeled off or damaged.

—Modification 2 of Embodiment 3—
13A to 13C are plan views showing a procedure for forming the wiring body 20 according to the second modification of the third embodiment.
First, as shown in FIG. 13A, two flat spacer members 11 are prepared. The spacer member 11 has a cut 11a as an opening through which the FPC 21 can be inserted. Instead of the cut line 11a, a slit may be formed as an opening through which the FPC 21 can be inserted.

First, the wiring body 20 is formed by inserting the FPC 21 through the cuts 11a of the spacer members 11 as shown in FIG. Thereafter, the

harness portions

25a and 25b are attached to both ends of the FPC 21, respectively. As described above, the

harness portions

25a and 25b can be attached to the FPC 21 in advance. In this case, as a matter of course, the cut 11a and the like are dimensioned so that the

harness portions

25a and 25b can be inserted.

Next, a liquid adhesive such as epoxy resin is dropped on the spacer member 11 and the FPC 21. Then, as shown in the enlarged view of FIG. 13C, the adhesive layer 17 is formed by curing the epoxy resin or the like while pressing from above with the pressing plate 50. Thereafter, the pressing plate 50 is removed. As the pressing plate 50, a material having poor adhesion such as a fluororesin is used.

The adhesive layer 17 fills the cuts 11 a of the spacer member 11 while embedding a part of the FPC 21. That is, one surface side of the spacer member 11 is sealed only by the adhesive layer 17. Thereby, the wiring body 20 is formed.

In the wiring body 20 of the second modified example, the adhesive layer 17 and the spacer member 11 constitute a covering portion c1 that seals the FPC 21.
Also in the second modification, as shown in the enlarged view of FIG. 10C, the double-sided waterproof tape 13 may be attached to the other surface (back surface) of the spacer member 11 at this stage.

Thereafter, similarly to the structure shown in FIGS. 11A to 11C, the spacer member 11 is fixed to the

first casings

31a and 41a by the fixing member 13 such as a double-sided waterproof tape. Thereby, the seal structure using the wiring body 20 of the modification 2 is obtained (not shown).

In the second modification, a waterproof structure can be realized without using a lid member. Since the lid member is unnecessary, a thinner seal structure than that of the third embodiment can be obtained.
In addition, you may affix the sealing tape 19 shown in FIG. 11 on the adhesive bond layer 17 of this modification 2. FIG. Thereby, the fall of the reliability by having no cover member can be prevented.

-Variations 3 and 4- of Embodiment 3
FIG. 14A is a plan view of a spacer member according to the third modification of the third embodiment, and FIG. 14B is a plan view of the spacer member according to the fourth modification of the third embodiment.
When the

harness portions

25a and 25b are inserted through the opening of the spacer member 11 using the FPC 21 attached in advance, the periphery of the opening is closed in the spacer member 11 shown in FIG. 10 (a) and FIG. 13 (a). Therefore, it is necessary to make the width of the opening wider than the width of the

harness portions

25a and 25b.
Therefore, when the width of the

harness portions

25a and 25b is considerably larger than the width of the FPC, the opening width of the spacer member 11 needs to be considerably larger than the width of the FPC. Therefore, it is not preferable because the opening needs to be filled with an adhesive.
Therefore, in the spacer member 11 according to the third modification of the third embodiment shown in FIG. 14A, a dividing portion 11b that communicates from the opening to the lateral outside is provided at one location.
Thereby, even if it is FPC21 which attached

harness part

25a, 25b previously, the part of FPC21 can be put into opening directly from the side via the said parting part 11b.
When the subsequent adhesive layer 17 is formed, the divided portion 11b can be joined and integrated. Therefore, the spacer member 11 only needs to consider the opening size according to the width of the FPC 21, and a good seal structure can be obtained.

In the spacer member 11 according to the fourth modification of the third embodiment shown in FIG. 14B, the spacer member 11 is composed of a pair of divided

spacer pieces

11c and 11c. In the fourth modification, the pair of

spacer pieces

11c and 11c are divided at positions on both sides in the middle of the opening in the direction in which the FPC 21 is inserted.
Thereby, even if it is FPC21 which attached the

harness parts

25a and 25b previously, a pair of

spacer pieces

11c and 11c can be mounted | worn. Therefore, the FPC 21 can be inserted into the opening of the spacer member 11.
The pair of

spacer pieces

11c and 11c can be combined and integrated when the adhesive layer 17 is formed thereafter. That is, the spacer member 11 needs to have an opening and be connected in an annular shape in a state where the spacer member 11 is assembled as a seal structure 15, but does not necessarily have an integral shape in a state before being incorporated.
Therefore, also in the fourth modification, the spacer member 11 formed of the

spacer pieces

11c and 11c only needs to take into account the opening size according to the width of the FPC 21, and a good seal structure can be obtained.

(Embodiment 4)
FIG. 15 is a perspective view schematically showing the structure of the openable portable terminal 1 (electronic device) according to the fourth embodiment.
The mobile terminal 1 includes a display unit 3 for displaying various types of information, an input unit 4, and a hinge unit 5. The display unit 3 is provided with a display device 6 using a liquid crystal display panel, a speaker, and the like. The input unit 4 is provided with input keys and a microphone. The hinge part 5 has connected the input part 4 and the display part 3 so that rotation is possible.

FIG. 16 is a cross-sectional view illustrating a configuration of a connection portion via the hinge portion 3 of the mobile terminal 1 according to the second embodiment. In the figure, members having the same functions as those shown in FIG. 2 of the first embodiment are denoted by the same reference numerals and description thereof is omitted.
In the present embodiment, a through hole 33 is provided between the first housing 31 a and the second housing 31 b in the display unit housing 31. Also in the input unit housing 41, a through hole 43 is provided between the first housing 41a and the second housing 41b.

Further, the wiring body 20 for connecting the input unit substrate 45 and the display unit substrate 35 through the hinge unit 5 is provided. The wiring body 20 includes an FPC 21 and

harness portions

25 a and 25 b provided at both ends of the FPC 21. Each

harness part

25a, 25b is connected to each board |

substrate

As shown in the partially enlarged view of FIG. 16, a seal structure 15 is provided around the through hole 33 of the display unit casing 31 and the through hole 43 of the input unit casing 41.
Also in the present embodiment, the seal structure 15 includes the spacer member 11, the double-sided waterproof tape 13 (adhering member), the lid member 14, and the adhesive layer 17. That is, the configuration and function of the seal structure 15 are as described in the first and third embodiments.

That is, the wiring body 20 and the seal structure 15 of the present invention can be applied not only to a slide type mobile terminal but also to an open / close type mobile terminal.
However, the present invention can exhibit a remarkable effect when applied to an electronic device in which space is limited and waterproofing is difficult with other seal structures, such as a sliding portable terminal.

In the present embodiment, the first and second modifications of the third embodiment can be employed.

(Other embodiments)
The structure of the embodiment of the present invention disclosed above is merely an example. Therefore, the scope of the present invention is not limited to the scope of these descriptions. The scope of the present invention includes the scope indicated by the recitation of the claims. Further, the scope of the present invention includes all modifications within the meaning and scope equivalent to the description of the claims.

The wiring body and seal structure of the present invention can be used for electronic devices such as portable terminals, PDAs, personal computers, and digital cameras.

C Covering body c1 Covering part 1 Portable terminal (electronic device)
DESCRIPTION OF SYMBOLS 3 Display part 4 Input part 6 Display apparatus 8 Slide part 8a Outer frame 8b Inner frame 11 Spacer member 11a Cut

11b Dividing part

11c Spacer piece 13 Double-sided waterproof tape 14 Lid member 15 Seal structure 17 Adhesive layer 19 Seal tape 20 Wiring body 21 FPC (wiring member)
25a, 25b Harness unit 31 Display unit housing 31a First housing 31b Second housing 33 Through hole 35 Display unit substrate 41 Input unit housing 41a First housing 41b Second housing 43 Through hole 45 Input unit substrate 50 Pressure plate

Claims

A sealing structure for sealing a through hole of a housing into which a wiring member is inserted,
A seal structure including a spacer member disposed on one side of the through hole, and including a covering body that fixes and seals the spacer member, the wiring member, and the housing to each other.
The spacer member has an opening through which the wiring member is inserted,
The seal structure according to claim 1, wherein the covering includes an adhesive layer that closes the opening while embedding a part of the wiring member.
The covering is
A lid member facing the spacer member across a part of the wiring member;
An adhesive layer that closes a gap between the spacer member and the lid member while embedding a part of the wiring member;
The seal structure according to claim 1, comprising:
The seal structure according to any one of claims 1 to 3, wherein the cover includes a fixing member disposed between a region surrounding the opening and the spacer member.
The sealing structure according to claim 4, wherein the fixing member is a double-sided waterproof tape.
The seal structure according to any one of claims 2 to 5, wherein the adhesive layer is made of a resin adhesive having a repair property.
The resin adhesive is a mixture of thermosetting and thermoplastic resin. The seal structure according to claim 6.
The seal structure according to any one of claims 1 to 7, further comprising a tape member that covers a region around the spacer member, the covering, and the through hole.
A method for forming a seal structure according to claim 1,
Inserting the wiring member through the through hole (a);
(B) covering the space between the spacer member, the wiring member, and the casing with a covering containing a resin adhesive in a region surrounding the through hole of the casing in a closed ring shape;
Solidifying the resin adhesive (c);
A method of forming a seal structure including:
In the formation method of the seal structure according to claim 9,
In the step (b), the resin body of the resin adhesive is interposed on at least a part of the surface of the spacer member that contacts the wiring member or the casing, and then the lid member is pressed from above. Forming method.
A wiring body into which a part is inserted from a through hole provided in a housing of an electronic device,
A wiring member;
Including a spacer member having an opening through which the wiring member is inserted, and a covering portion for sealing the wiring member and the spacer member on one surface side of the spacer member;
Wiring body equipped with.
The covering portion is
A lid member facing the spacer member across a part of the wiring member;
The wiring body according to claim 11, further comprising an adhesive layer that fills a gap between the spacer member and the lid member while embedding a part of the wiring member.
The wiring body according to claim 11, wherein the covering portion includes an adhesive layer that embeds a part of the wiring member and closes an opening of the spacer member.
The wiring body according to any one of claims 11 to 13, wherein a fixing member is provided on a surface of the spacer member opposite to a side on which the adhesive layer is provided.
The wiring body according to claim 14, wherein the fixing member is a double-sided waterproof tape.
A housing in which a through hole into which the wiring body is inserted is formed;
The seal structure according to any one of claims 1 to 8,
Equipped with electronic equipment.
The electronic device according to claim 16, wherein
The case is a display unit case and an input unit case which are connected via a slide part and each has a through hole formed therein.
The wiring member is connected to an internal circuit of each casing through a through hole of each casing from the slide portion,
An electronic apparatus in which the through holes of the display unit casing and the input unit casing are sealed by the seal structure.