JP2007176102A - Insert molding method of cabinet of electronic device and electronic device having cabinet covered with cover made of leather - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To certainly bond leather or synthetic leather to the cabinet of an electronic device while keeping the soft touch. <P>SOLUTION: A synthetic leather main body 30 and a double-side tape 43 wherein both surfaces of a nonwoven fabric are impregnated with an adhesive are prepared. The double-side tape 43 is bonded to the back side of the synthetic leather main body 30 to mold a synthetic leather cover 9. This synthetic leather cover 9 is attached to a mold 31 so that the synthetic leather main body 30 comes into contact with the molding surface 32a and a molten resin is cast on the side of the double-side tape 43 to be subjected to insert molding. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for insert-molding a cabinet of an electronic device such as a portable communication device and an electronic device such as a portable communication device having a cabinet covered with a leather cover.

  2. Description of the Related Art Conventionally, mobile communication devices, particularly mobile phones, have been widely spread not only for younger age groups but also for older age groups. And each manufacturer is not only equipped with various new functions, but also has a new idea on the appearance of the product. Appearance colors start from gray, white, and silver, and bright colors such as red, orange, blue, and yellow have emerged. And now, products with leather or synthetic leather attached are being born. Products with leather or synthetic leather attached are generally formed by insert molding when the cabinet is molded. In this case, leather or synthetic leather is attached to a mold in advance at the time of cabinet molding, and a molten resin is allowed to flow at the same time.

In Patent Document 1, in the insert molding method of a decorative sheet and a synthetic resin, a concave portion, a convex portion, or a convex line is formed in a portion corresponding to a portion to be squeezed that is a corner portion of a decorative sheet of a mold. Are disclosed. This prevents the occurrence of wrinkles at the corner when leather or synthetic leather is insert-molded into a cabinet having a curved surface.
JP-A-9-131755

  However, even with the insert molding method of Patent Document 1, if a decorative sheet with a textured leather wrinkle pattern is used to give a leather feel, a gap is generated between the synthetic resin and the synthetic resin. In some cases, the adhesion of the resin becomes insufficient.

  In addition, there is a problem in that the leather wrinkles of the decorative sheet are crushed by the molding pressure during insert molding, and the touch feel becomes hard.

  In view of the above-described problems, an object of the present invention is to securely attach leather or synthetic leather to a cabinet of an electronic device while maintaining a soft tactile sensation.

  In order to achieve the above object, in the present invention, a leather cover in which a double-sided tape is bonded to leather or synthetic leather is insert-molded.

  Specifically, the first invention presupposes a method for insert molding a cabinet of an electronic device.

And prepare leather or synthetic leather, and double-sided tape with adhesives impregnated on both sides of the nonwoven fabric,
A leather cover is formed by pasting the double-sided tape on the back side of the leather or synthetic leather,
Attach the leather cover to the mold so that the leather or synthetic leather contacts the molding surface,
It is set as the structure which pours molten resin into the said double-sided tape side, and insert-molds.

  According to said structure, since the double-sided tape is affixed between molten resin and leather or synthetic leather, molten resin and leather or synthetic leather are firmly adhere | attached at the time of insert molding. Further, since the nonwoven fabric layer is provided on the double-sided tape, the surface of the leather or synthetic leather is not easily crushed by the molding pressure during insert molding, and the soft touch of the leather cover is maintained.

  In 2nd invention, the said synthetic leather is comprised by the urethane layer to which the leather wrinkle of the surface side was given, and the nonwoven fabric layer of a back surface side.

  According to said structure, a soft tactile sensation is implement | achieved by the nonwoven fabric layer, and the leather wrinkle imitating the surface of leather can be shape | molded by processing a urethane layer. Urethane is more resistant to water, moisture and dirt than leather, so it is easy to care for and can provide a variety of colors.

In 3rd invention, the said synthetic leather shape | molds pressing a planar urethane and a planar nonwoven fabric with a roller,
The unevenness for leather wrinkles formed on the urethane side roller gives a tactile sensation similar to leather.

  According to said structure, a leather wrinkle pattern is easily given to the urethane layer of synthetic leather, and the soft touch similar to leather is obtained.

  In the fourth invention, the electronic device is a mobile communication device.

  According to the above configuration, the mobile communication device looks good and feels good because of the leather cover, and therefore, portability, merchantability, and the like are excellent.

  In the fifth invention, the mobile communication device is a mobile phone.

  According to said structure, the external appearance and touch feeling of a mobile telephone improve.

In a sixth invention, the cabinet is an insert molded product in which leather or synthetic leather and a resin base material are bonded with a double-sided tape,
In the double-sided tape, both sides of the nonwoven fabric are impregnated with an adhesive.

  According to said structure, since the double-sided tape is affixed between the resin base material and leather or synthetic leather, the resin base material and leather or synthetic leather are firmly adhere | attached at the time of insert molding. Further, since the nonwoven fabric layer is provided on the double-sided tape, the surface of the leather or synthetic leather is not easily crushed by the molding pressure during insert molding, and the soft touch of the leather cover is maintained.

  In 7th invention, the said synthetic leather is comprised by the urethane layer to which the leather wrinkle of the surface side was given, and the nonwoven fabric layer of a back surface side.

  According to said structure, a soft tactile sensation is implement | achieved by the nonwoven fabric layer, and the leather wrinkles imitating the surface of the leather can be shape | molded by processing a urethane layer. Urethane is more resistant to water, moisture and dirt than leather, so it is easy to care for and can provide a variety of colors.

  In the eighth invention, the electronic device is a portable communication device.

  According to the above configuration, the mobile communication device looks good and feels good because of the leather cover, and therefore, portability, merchantability, and the like are excellent.

  In a ninth invention, the mobile communication device is a mobile phone.

  According to said structure, the external appearance and touch feeling of a mobile telephone improve.

  In a tenth aspect of the invention, the cabinet covers a surface opposite to the surface on which the operation unit is provided.

  According to said structure, since the part which the mobile phone touches and the part which is conspicuous on the external appearance is covered with the leather cover, the merchantability is excellent.

  As described above, according to the present invention, a double-sided tape in which an adhesive is impregnated on both surfaces of a nonwoven fabric is attached to leather or synthetic leather, and a molten resin is insert-molded on the double-sided tape side. For this reason, leather or a synthetic leather can be reliably stuck to the cabinet of an electronic device, maintaining a soft touch.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a perspective view showing a closed state of a mobile phone according to an embodiment of the present invention. FIG. 2 is a perspective view showing an open state of the mobile phone according to the embodiment of the present invention.

  As shown in FIGS. 1 and 2, the mobile phone 1 of the present embodiment includes a first housing 2 and a second housing 3, and these first housing 2 and second housing 3. 3 is rotatably coupled by a hinge portion 4. On the inner side (front side) of the first housing 2, a receiver 5 and a display 6 are provided. On the outer side (back side) of the first housing 2, a sub display unit 7 and a speaker sound emitting unit 8 for displaying a clock display and the name of the other party during communication are provided. The cabinet that covers the first housing 2 is divided into front and back sides, and the back cabinet 2a that covers the back side is formed of a resin base 20 and an outer surface of the base 20 as shown in FIG. A synthetic leather cover 9 is provided as a stuck leather cover.

  Inside the second housing 3, a function button 11 for switching and determining various functions, an input button 12 for inputting information, a transmitter 13 and the like are provided. The function buttons 11 and the input buttons 12 constitute the operation unit 50. A camera unit (not shown) is provided outside the second housing 3, and a charging terminal unit (not shown), a volume button 15, an earphone microphone terminal cover 16, a card insertion unit (not shown) are provided on the side surface side. No) is installed.

  The base material 20 is made of, for example, ABS, AS, PC (polycarbonate), or the like.

  As shown in FIG. 3, the synthetic leather body 30 constituting the synthetic leather cover 9 is formed, for example, by pressing the surface-side planar urethane layer 41 and the back-side planar nonwoven fabric layer 42 with a roller. The leather wrinkle irregularities formed on the roller on the urethane layer 41 side give a touch similar to leather. The synthetic leather cover 9 may be made of natural animal leather, but is preferably made of synthetic leather in consideration of quality variations.

  A double-sided tape 43 is bonded to the nonwoven fabric layer 42 side of the synthetic leather body 30. This double-sided tape 43 is made by impregnating an adhesive 43b (for example, an acrylic adhesive) on both sides of a flexible nonwoven fabric 43a. The adhesive 43b of the double-sided tape 43 is made of a material having high adhesion to the uneven surface. That is, the thickness of the nonwoven fabric 43a is, for example, 0.30 mm in order to improve rough surface adhesion.

  The speaker sound emitting unit 8 may be formed integrally with the back cabinet 2a at the time of molding. However, in order to reliably provide a sound emitting hole, the speaker sound emitting unit 8 is constituted by a separate member made of resin or metal, and the back cabinet 2a. It is desirable to fit from the back side.

  As shown in FIG. 1, the boundary of the outer shape of the synthetic leather cover 9 is covered by a decorative ring 10, and the boundary line between the synthetic leather cover 9 and the base material 20 is hidden by the decorative ring 10. Yes.

  As shown in FIG. 7, the surface of the sub display unit 7 is covered with a transparent cover 26.

−Cabinet insert molding method−
Next, an insert molding method for the back cabinet 2a of the mobile phone 1 will be described.

  FIGS. 3 to 6 are views showing the order of manufacturing the synthetic leather cover 9 that covers the external appearance of the first housing 2.

  First, as shown in FIG. 3, the double-sided tape 43 is affixed on the nonwoven fabric layer 42 side of the flat synthetic leather main body 30. This double-sided tape 43 is used for adhesion to the substrate 20 during insert molding. The surface of the double-sided tape 43 is covered with a separator (not shown). In this way, the flat synthetic leather cover 9 is formed in advance.

  Next, as shown in FIGS. 4 and 5, the flat synthetic leather cover 9 of FIG. 3 is made to have the curved shape of the first housing 2 while applying temperature with a press molding machine (not shown). Provide irregularities on the surface. In addition, since the surface of the double-sided tape 43 is covered with a separator, the synthetic leather cover 9 is not attached to the press mold. At this time, the sub display portion recess 18 is recessed at a position corresponding to the sub display portion 7, and the speaker portion recess 19 is recessed at a position corresponding to the speaker sound emitting portion 8 (see a cross-sectional view taken along line XX). Also, the corner portion 23 is formed at the same time.

  Next, as shown in FIG. 6, the curved synthetic leather cover 9 of FIG. 5 is cut into the outer shape of the shape of the first housing 2 and necessary holes are punched out. Here, in making holes in the speaker sound emitting unit 8 and the sub display unit 7, holes are made along the recesses on the inner side of the recess side surfaces of the sub display unit recesses 18 and the speaker unit recesses 19. For this reason, the sub display portion hole 24 and the speaker portion hole 25 are formed so that the cut surface is bent so as to bend downward (see a cross-sectional view taken along the line YY). Thus, the cut surface around the hole is covered with the synthetic leather main body 30, so that it looks good.

  Next, as shown in FIG. 8, the synthetic leather cover 9 of FIG. 5 is attached so that the synthetic leather main body 30 side contacts the molding surface 32 a of the lower mold 32 of the injection mold 31, and the separator of the double-sided tape 43 is peeled off. The synthetic leather cover 9 is attached to the lower mold 32 by the speaker sound emitting portion 8 and the sub display portion hole 24 and the speaker portion hole 25 of the sub display portion 7. Then, the upper mold 33 is closed to form the cavity 34. A molten resin is poured into the cavity 34 and insert molding is performed by injection molding. At this time, the double-sided tape 43 is in close contact with the substrate 20. Further, due to the cushioning property of the nonwoven fabric 43a of the double-sided tape 43, the leather wrinkle pattern of the urethane layer 41 is not easily crushed by pressure during molding. Thereby, the back side cabinet 2a of the 1st housing | casing 2 shown in FIG. 7 is completed (refer ZZ sectional drawing).

-Effect of the embodiment-
Therefore, according to the method of insert molding the cabinet of the electronic device according to the present embodiment, the double-sided tape 43 in which the adhesive 43b is impregnated on both surfaces of the nonwoven fabric 43a is attached to the synthetic leather main body 30, and the resin is applied to the double-sided tape 43 side. The base material 20 is insert-molded. For this reason, the synthetic leather main body 30 can be reliably adhered to the back side cabinet 2a while maintaining a soft tactile sensation.

(Other embodiments)
The present invention may be configured as follows with respect to the above embodiment.

  That is, in the said embodiment, portable communication apparatuses, such as PHS and PDA, may be sufficient as a foldable mobile phone. Moreover, not only a folding type but a straight type portable communication device may be used.

  In the said embodiment, although the back side cabinet 2a was shape | molded by injection molding, you may shape | mold the back side cabinet 2a by compression molding. In that case, silicon can be used as the base material.

  In addition, the above embodiment is an essentially preferable illustration, Comprising: It does not intend restrict | limiting the range of this invention, its application thing, or a use.

  As described above, the present invention is useful for an electronic device such as a mobile phone having a cabinet covered with a leather cover and a method for forming the cabinet.

It is a perspective view which shows the closed state of the mobile telephone which concerns on embodiment of this invention. It is a perspective view which shows the open state of the mobile telephone which concerns on embodiment of this invention. (B) is a top view which shows the state which adhered the double-sided tape to the synthetic leather main body in the manufacture order of a synthetic leather cover, (a) is the XX sectional drawing. (B) is a top view which shows the state shape | molded with the press molding machine in the manufacture order of a synthetic leather cover, (a) is the figure which shows the sectional drawing. It is a perspective view which shows the synthetic leather cover shape | molded with the press molding machine. (B) is a top view which shows the state which carried out the external shape cut in the manufacturing order of the synthetic leather cover, and the punching, (a) is the YY sectional view taken on the line. (B) is a top view which shows the state which insert-molded the synthetic leather cover in the manufacture order of a synthetic leather cover, (a) is the ZZ sectional drawing. It is sectional drawing which shows a mode that molten resin is poured with an injection mold and a back side cabinet is shape | molded.

Explanation of symbols

1 Mobile phone (electronic equipment, mobile communication equipment)
2a Backside cabinet (cabinet)
7 Sub display section 8 Speaker sound emission section 9 Synthetic leather cover (leather cover)
30 Synthetic leather body (leather or synthetic leather)
31 Mold 32a Molding surface 41 Urethane layer 42 Non-woven fabric layer 43 Double-sided tape 43a Non-woven fabric 43b Adhesive 50 Operation part

Claims (10)

In a method of insert molding an electronic equipment cabinet,
Prepare leather or synthetic leather and double-sided tape with both sides of nonwoven fabric impregnated with adhesive,
A leather cover is formed by pasting the double-sided tape on the back side of the leather or synthetic leather,
Attach the leather cover to the mold so that the leather or synthetic leather contacts the molding surface,
An insert molding method for an electronic equipment cabinet, wherein molten resin is poured into the double-sided tape side to perform insert molding. In the insert molding method of the cabinet of the electronic device according to claim 1,
The said synthetic leather is comprised by the urethane layer by which the leather wrinkles of the surface side were given, and the nonwoven fabric layer of the back side, The insert molding method of the cabinet of the electronic device characterized by the above-mentioned. In the insert molding method of the cabinet of the electronic device according to claim 2,
The synthetic leather is molded while pressing a plane urethane and a plane nonwoven fabric with a roller,
An insert molding method for a cabinet of an electronic device, characterized by providing a leather-like tactile sensation by means of leather wrinkles formed on the urethane side roller.   The said electronic device is a portable communication apparatus, The insert molding method of the cabinet of the electronic device as described in any one of Claim 1 thru | or 3 characterized by the above-mentioned.   5. The method of insert molding of an electronic equipment cabinet according to claim 4, wherein the mobile communication equipment is a mobile phone. An electronic device having a cabinet covered with leather or synthetic leather,
The cabinet is an insert molded product in which leather or synthetic leather and a resin base material are bonded with a double-sided tape,
The above double-sided tape is an electronic device wherein both sides of a nonwoven fabric are impregnated with an adhesive. The electronic device according to claim 6,
The above-mentioned synthetic leather is composed of a urethane layer provided with a leather wrinkle on the front side and a non-woven fabric layer on the back side. The electronic device according to claim 6 or 7,
An electronic device that is a portable communication device. The electronic device according to claim 8,
An electronic device characterized by being a mobile phone. The electronic device according to claim 9,
An electronic apparatus, wherein the cabinet covers a surface opposite to a surface on which an operation unit is provided.

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