JP2011244024A - Electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic apparatus that can be easily disassembled to components without leaving the adhesive of a double-sided tape when peeling off the double-sided tape for bonding the components composing the electronic apparatus, in order to enable reuse of the components.SOLUTION: A second member 15 covering a first member 11 and an electronic component 141 are attached to the first member 11 for housing the electronic component 141 by a frame-shaped double-sided tape 20. A tab 21 is provided on the outside of the frame shape, and the double-sided tape 20 can be thereby peeled off by pulling the tab 21. At this time, the frame-shaped double-sided tape 20 is cut and taken out as one piece from a slit 24 provided in the vicinity of the tab 21, and thereby, the double-sided tape 20 can be easily peeled off, and the second member 15 can be easily removed from the first member 11.

Description

  The present invention relates to an electronic device in which an electronic component is attached to an electronic device body using a double-sided tape.

2. Description of the Related Art Conventionally, an electronic device in which an electronic component is attached to an electronic device body using a double-sided tape is known (for example, see Patent Document 1).
FIG. 6 shows an upper housing 101 of a mobile phone 100 as an electronic device. As shown in FIG. 6A, in the upper casing 101, two cameras 103 and 104 are provided near the center of the left side above the display unit 102, and an acoustic component 105 is provided on the right side. .
FIG. 6B shows a double-sided tape 107 for attaching the screen 106 (see FIG. 6C) to the upper housing 101. The double-sided tape 107 is formed by cutting out a display window 108 of the display unit 102, a camera window 109 for the camera 103, and a sound guide window 111 for the acoustic component 105.

  Next, as shown in FIG. 6C, the double-sided tape 107 is attached to the position of the display unit 102 outside the upper housing 101 by aligning the display window 108 of the double-sided tape 107, and A transparent screen 106 is pasted on top. As a result, the display unit 102 is protected by the screen 106.

Japanese Patent Laying-Open No. 2005-229318 (FIG. 1)

  The conventional mobile phone 100 as described above has high bonding reliability due to the high adhesive strength of the double-sided tape 107, but it is difficult to peel off the double-sided tape because of the high adhesive strength, Separation and dismantling was difficult. In addition, when the screen 106 is separated from the upper housing 101, the adhesive or base material of the double-sided tape is left behind on the screen 106 or the upper housing 101 because the adhesive or base material is split between the layers, and these parts cannot be reused. was there.

  The present invention has been made in order to solve the conventional problems, and when peeling a double-sided tape that joins parts constituting an electronic device, the adhesion and the base material are not broken (separated) between the layers. Electronic equipment that can be easily deployed to parts and reused by peeling off at the interface of the body and smoothly peeling without causing double-sided tape to break or adhesive residue on the adherend The purpose is to provide.

  The electronic apparatus according to the present invention includes a first member, an electronic component provided in the first member, a second member that covers the electronic component, and a frame shape that fixes the first member and the second member. The double-sided tape has a tab provided on the outside of the frame shape and a notch provided in the vicinity of the tab.

  In the electronic device of the present invention, the tab is provided with a hole.

  In the electronic device of the present invention, the cut is provided outside the double-sided tape.

  Furthermore, in the electronic apparatus of the present invention, the tab is rectangular.

  Further, in the electronic device of the present invention, the notch is expanded toward the outside of the double-sided tape.

  In the present invention, by pulling the tab, the frame-shaped double-sided tape is cut into one piece from the notch provided in the vicinity of the tab, and the double-sided tape does not break (separate) between the layers of the adhesive and the base material. Since it peels at the interface of the adherend, it is possible to provide an electronic device having an effect that the first member and the second member can be easily disassembled and reused without leaving an adhesive.

The perspective view which shows the whole electronic device of embodiment which concerns on this invention Cross section of double-sided tape (A) is a perspective view showing the entire double-sided tape, (B) is an enlarged view of B part in (A), (C) is an enlarged view of a main part showing a modification of the double-sided tape. Perspective view showing the operation of peeling double-sided tape (A) is a cross-sectional view of a state where a screen is attached to the upper housing with a double-sided tape, and (B) is a cross-sectional view showing a state when the double-sided tape is pulled out FIG. 2A is a plan view of an upper case, FIG. 2B is a plan view of a double-sided tape, and FIG. 3C is a plan view of an upper case with a screen attached thereto.

Hereinafter, electronic devices according to embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, a mobile terminal 10 as an electronic apparatus according to an embodiment of the present invention includes, for example, an upper casing 11 having a display unit 14, a lower casing 12 having an operation unit 16, and an upper casing 11. And the connection part 13 which connects the lower housing | casing 12 so that opening and closing is possible.
The upper housing 11 as the first member is a rectangular box-shaped member having a large upper surface (upper surface in FIG. 1), and has frame portions 111 on four sides of the upper housing 11. In addition, a receiver 17 and a camera 18 are provided at the upper end portion of the frame portion 111. Inside the upper housing 11, a liquid crystal display plate 141 that is an electronic component constituting the display unit 14 is accommodated, and a screen 15 that is a second member that covers the surface of the liquid crystal display plate 141 is provided. The screen 15 is attached by a double-sided tape 20 that is attached along the entire circumference of the frame portion 111 of the upper housing 11.

FIG. 2 is a cross-sectional view showing a form of the double-sided tape 20 used in the present invention. The illustrated double-sided tape 20 has a stretchable base material 22, and an adhesive layer 23 is formed on both surfaces of the base material 20. The substrate 22 used here is preferably made of a highly extensible polymer film.
Here, the high extensibility indicates a property such that when the base material 22 of the double-sided tape 20 is stretched in the longitudinal direction, an elongation of 350% or more is generated based on the original length.
The polymer film used as the substrate 22 in the present embodiment can cause an elongation of 350 to 700%. Furthermore, it is desirable that this polymer film has a tensile strength of 40 MPa or more, an elastic recovery of less than about 50% after being stretched, and a glass transition point of −20 ° C. or less.

The pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer 23 is composed of a homopolymer of a (meth) acrylic acid ester monomer or a copolymer of a (meth) acrylic acid ester monomer and another monomer copolymerizable therewith. An acrylic pressure-sensitive adhesive in which an acrylic polymer is used as a base polymer and additives such as a cross-linking agent and a tackifying resin are blended therein can be used.
The acrylic polymer contains (meth) acrylic acid and a (meth) acrylic acid ester having 4 to 12 carbon atoms in the alkyl group in order to set the glass transition point to −20 ° C. or less. A monomer copolymer containing 50 to 100% by weight is preferred.

In order to enhance the adhesive effect with the pressure-sensitive adhesive that becomes the pressure-sensitive adhesive layer 23, the surface of the base material 22 is preferably subjected to plasma treatment in advance (see X in FIG. 2).
Examples of the plasma treatment include corona discharge treatment, plasma discharge treatment, flame treatment, electron beam irradiation, and ultraviolet irradiation.

  As shown in FIG. 3A, the double-sided tape 20 has an overall rectangular frame shape, and the tab 21 is located outside (upward) in the vicinity of the end (here, the right end) of the upper side 201 that is one side thereof. Is provided to protrude. As shown in FIG. 5A, the frame-shaped portion 202 including the upper side 201 of the double-sided tape 20 has a laminated structure, has a base material 22 in the center, and adhesives on both upper and lower surfaces of the base material 22. An adhesive to be the layer 23 is applied. In addition, although the adhesive may be apply | coated to the both surfaces of the tab 21, it is preferable that it is comprised only with the base material 22. FIG.

In the present embodiment, a receiver panel 19 that covers the receiver 17 and the camera 18 is attached to the upper casing 11 of the mobile terminal 10 at a position adjacent to the screen 15 on the side opposite to the connecting portion 13. The tab 21 of the double-sided tape 20 protrudes from the bottom of the screen 15 and is hidden under the receiver panel 19.
For this reason, even if the double-sided tape 20 is provided with the tab 21, the tab 21 is hidden by the receiver panel 19, and the liquid crystal display plate 141 and the screen 15 can be joined without impairing the appearance of the mobile terminal 10.

  As shown in FIG. 3B, the tab 21 has a rectangular shape, and a hole 211 is provided at least in the central portion that is outside the upper side 201. Further, in the tab 21, a cut 24 is formed at a position where the vertical side 212, which is the outline of the end portion side (right side in FIG. 3B) of the frame-like portion 202, extends to the upper side 201. The notch 24 is cut from the front to the back of the double-sided tape 20 and cut from the end of the upper side 201 on the tab 21 side, that is, the outer edge of the frame-shaped portion 202 in the middle of the width of the frame-shaped portion 202 (for example, , Up to the vicinity of the center of the width of the frame-shaped portion 202). Usually, since the double-sided tape 20 holds the shape of a rectangular frame, the inside of the frame-like portion 202 is kept sealed, but the direction in which the notch 24 is opened (the direction of arrow A in FIG. 3B). When an external force is applied, the notch 24 is opened, and the inside of the frame-shaped portion 202 is easily cut.

  Note that the double-sided tape 20 </ b> A shown in FIG. 3C has a shape in which the cuts 24 expand outward, so that the frame-shaped portion 202 can be divided more easily.

Next, an operation for removing the screen 15 from the upper housing 11 will be described.
As shown in FIG. 1, the screen 15 is attached to the frame portion 111 of the upper housing 11 with a rectangular frame-shaped double-sided tape 20. In this state, the frame-like portion of the double-sided tape 20 has a closed rectangular shape, so that waterproof performance and dust-proof performance inside the upper housing 11 are ensured and bonding reliability is maintained.

  In order to separate the screen 15 from this state, as shown in FIG. 4, the tab 21 of the double-sided tape 20 is raised from the surface of the upper housing 11, and a thin bar-like tool is inserted into the hole 211 of the tab 21 and hooked. Then, the tab 21 is pulled strongly outward (in the direction of arrow A in FIG. 4) through the tool. Thereby, a fracture | rupture starts from the notch 24 provided in the vicinity of the tab 21, and the double-sided tape 20 is cut | disconnected. Further, when the tab 21 is pulled out along the direction of the double-sided tape 20 (in the direction of arrow B in FIG. 4), the double-sided tape 20 becomes a single string and is pulled out from between the screen 15 and the upper housing 11. .

  At this time, the tab 21 is provided on the base material 22, and the base material 22 is pulled out by pulling out the tab 21. Since the base material is made of a highly extensible polymer film, when the base material 22 is pulled out strongly as shown in FIG. 5A, the base material 22 contracts in the thickness direction as shown in FIG. 5B. Elongate in the longitudinal direction. Due to the elastic deformation in the thickness direction, the base material 22 is thinned, and the adhesive that has been adhered on the surface becomes line adhesion with a small contact area, so the interface between the adhesive layer 23 and the screen 15 and the upper housing 11 ( Peeling progresses from the adhesive surface. Then, the screen 15 is separated from the upper housing 11 by taking out the double-sided tape 20.

  The polymer film of the base material 22 used in this embodiment can cause an elongation of 350 to 700%. If the elongation percentage of the base material 22 is less than 350%, the film cannot be shrunk in the thickness direction, so that the peeling effect cannot be obtained. Becomes difficult.

  Further, the thickness of the substrate 22 is preferably 100 to 250 μm. If the thickness of the base material 22 is less than 100 μm, the amount of shrinkage in the thickness direction is insufficient, the line contact state is not formed, and the adhesive force is insufficiently reduced. The material 22 may break. On the contrary, if the thickness of the base material 22 exceeds 250 μm, the work of peeling the double-sided tape 20 from the adherend becomes substantially difficult due to the high tensile strength, and the effect of thinning the double-sided tape 20 is impaired.

In addition, since the surface of the base material 22 is preliminarily subjected to plasma treatment to enhance the adhesive force with the pressure-sensitive adhesive, even if the double-sided tape is pulled out strongly, the pressure-sensitive adhesive is pulled by the base material and remains on the interface of the adherend. It can be made to peel off.
Furthermore, since the double-sided tape 20 of the present embodiment is a material having a low glass transition point for both the base material 22 and the pressure-sensitive adhesive used as the pressure-sensitive adhesive layer 23, even if the mobile terminal 10 receives a shock such as a drop in a cold region, the shock is generated. Absorbability is not impaired, and highly reliable joining is possible.

  As described above, according to the mobile terminal 10 according to the embodiment of the present invention described above, the upper casing 11 that accommodates the liquid crystal display panel 141 has the screen 15 that covers the upper casing 11 and the liquid crystal display panel 141 and has both sides in a frame shape. Attached by tape 20. Since the double-sided tape 20 is provided with a tab 21 on the outside of the frame shape, the double-sided tape 20 can be peeled off by pulling the tab 21. At this time, since the frame-like double-sided tape 20 is cut from the notch 24 provided in the vicinity of the tab 21 to become one, the double-sided tape 20 can be easily peeled off, and the screen 15 can be easily removed from the upper casing 11. Can be removed from.

  Further, since the tab 211 provided outside the frame-shaped double-sided tape 20 has a hole 211, it can be pulled out strongly by hooking a tool or the like into the hole 211, and the double-sided tape 20 can be easily pulled out. Can do.

Further, since the cut 24 is provided on the outer side of the frame-shaped double-sided tape 20, when the tab 21 is pulled, the double-sided tape 20 is cut inward from the outer cut 24 to form one string. The double-sided tape 20 can be pulled out easily.
In particular, according to the double-sided tape 20 </ b> A shown in FIG. 3C, the frame-like portion 202 can be divided more easily because the cut 24 is shaped to expand outward.

  Moreover, since the tab 21 provided outside the rectangular frame-shaped double-sided tape 20 is rectangular, the slit 24 effectively acts by providing the slit 24 in the extension of the rectangular outline.

  Further, the tab 21 is provided on the base material 22, and the base material 22 is pulled out by pulling out the tab 21. For this reason, when the base material 22 is pulled out strongly and the base material 22 contracts in the thickness direction, the base material 22 becomes thin due to elastic deformation in the thickness direction, and the interface (adhesion) between the pressure-sensitive adhesive layer 23, the screen 15, and the upper housing 11. From the surface). For this reason, when the double-sided tape 20 is pulled out, the double-sided tape 20 can be removed cleanly without leaving the adhesive layer 23 of the double-sided tape 20 on the screen 15 and the upper housing 11, so that the screen 15 and the upper housing 11 are used as parts. Can be reused.

Note that the electronic apparatus of the present invention is not limited to the above-described embodiment, and appropriate modifications and improvements can be made.
For example, in the above-described embodiment, the case where the screen 15 is attached to the upper housing 11 using the double-sided tape 20 is illustrated, but the present invention is also applicable to other electronic devices.

10 Mobile devices (electronic devices)
11 Upper housing (first member)
141 LCD panel (electronic parts)
15 screen (second member)
20, 20A Double-sided tape 21 Tab 211 Hole 24, 24A Notch

Claims (5)

A first member;
An electronic component provided in the first member;
A second member covering the electronic component;
An electronic device comprising: a frame-like double-sided tape that fixes the first member and the second member;
The double-sided tape is an electronic device having a tab provided on the outside of a frame shape and a notch provided in the vicinity of the tab. The electronic device according to claim 1,
An electronic device in which a hole is provided in the tab. The electronic device according to claim 1 or 2,
An electronic device in which the cut is provided outside the double-sided tape. An electronic device according to any one of claims 1 to 3,
An electronic device in which the tab is rectangular. An electronic device according to any one of claims 1 to 4,
An electronic device in which the cut is expanded toward the outside of the double-sided tape.

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