JP5215928B2 - Electronics - Google Patents

Description

  The present invention relates to an electronic apparatus such as a mobile phone, in which a component storage chamber is formed in a housing.

  In a conventional mobile phone, a storage chamber for storing electronic components is formed inside by joining a front cabinet and a back cabinet that constitute a casing (see, for example, Patent Document 1). In the storage room, for example, an LCD (Liquid Crystal Display) visible from the front cabinet side, a second LCD visible from the back cabinet side, and the like are stored.

JP 2008-182607 A

  However, a slight gap is partially formed on the joint surfaces of both cabinets due to variations in finishing accuracy, etc., so there is a possibility that water may enter the gap from the outside due to water adhering to the mobile phone. In the cellular phone, no measures for preventing water from entering from the gap were taken. For this reason, there is a possibility that water may enter from the gap and the LCD or the second LCD may be damaged by the water.

  Accordingly, an object of the present invention is to provide an electronic device that can suppress the ingress of water into a storage chamber formed in a housing.

An electronic device according to the present invention is an electronic device comprising a casing constituent member having an opening serving as a component storage chamber, and a cover member that is bonded to the surface of the casing constituent member and closes the opening. Among the surface of the casing component member, at least around the opening, there are a plurality of through holes that penetrate the casing component member to the back surface, and a plurality of bottomed recesses that are recessed in the surface. Each is scattered.
In addition, the joining state of the casing constituent member and the cover member includes various well-known joining states such as a state where they are fused together, a state where they are joined together with an adhesive, and a state where they are joined together using a double-sided adhesive tape. Shall be included.

  In the electronic device, the back surface of the cover member is in close contact with the surface of the casing component member in a state where the cover member is joined to the casing component member. Will cause a gap. Therefore, when water enters the gap from the outside due to adhesion of water to the electronic device, the water moves toward the opening (storage chamber) on the surface of the casing constituent member.

  However, since a plurality of through holes and bottomed recesses are scattered at least around the opening (storage chamber) on the surface of the casing component member, the infiltrated water can be any through hole or bottomed. It enters into the recesses and moves along these inner walls. Further, even if the water that has entered the through hole or the bottomed concave portion flows out of the through hole or the bottomed concave portion due to the change in the posture of the electronic device, the water is transferred to other through holes or the bottomed concave portion. It will enter again. Therefore, since the infiltrated water must pass through the plurality of through holes and the bottomed recess before reaching the opening (storage chamber), it is difficult to reach the opening (storage chamber).

Further, in the electronic device, since both the through holes and the bottomed recesses are scattered on the surface of the casing constituent member, compared to the configuration in which the through holes are formed at the positions where the bottomed recesses are formed. And it can suppress that the intensity | strength of a housing | casing structural member falls.
Furthermore, by causing a plurality of through holes and bottomed recesses to be scattered on the surface of the casing constituent member, sink marks are unlikely to occur on the surface. Therefore, it is difficult for a large gap to be generated between the surface of the casing component member and the back surface of the cover member.

In the specific configuration of the electronic apparatus, a back member that closes the through hole is in close contact with the back surface of the casing constituent member. Here, the housing member may be made of resin, while the back member may be made of metal, and the back member may be fixed in close contact with the back surface of the housing member.
According to this specific configuration, the infiltrated water can be stored in the through hole, so that it is difficult for water to reach the opening (storage chamber) as compared with the configuration without the back member. Moreover, the strength of the casing constituent member can be increased by providing the back member.

  In another specific configuration of the electronic device, the plurality of through holes and the bottomed recess are formed by protruding grid-like ribs on the surface of the casing constituent member.

  The plurality of bottomed recesses are arranged so as to surround each through hole. As described above, the strength of the casing constituent member can be kept high by disposing the bottomed concave portion having a high strength around the through hole whose strength is likely to be lowered.

  In still another specific configuration of the electronic device, the casing component member is a resin molded product using a mold, and at least a part of the plurality of bottomed recesses penetrates between them. A resin injection portion which is a trace of a gate in which resin is injected into the mold is formed at a position near one end of the row of the bottomed recesses.

At the time of molding the mold, in the cavity of the mold comprising a projection for forming the through hole and a projection for forming a bottomed recess having a height dimension smaller than the projection, Resin flows from the gate, but at the position where the through-hole is formed, a protrusion for forming the through-hole is disposed, so that the resin flow is blocked by the protrusion.
On the other hand, at the position where the bottomed recess is formed, a protrusion having a height smaller than that of the protrusion for forming the through-hole is disposed, so that the resin flow is almost hindered by the protrusion. There is nothing.

  Therefore, in the mold, a part of the plurality of protrusions for forming the bottomed recesses are arranged in a row without interposing the protrusions for forming the through holes, and the rows of the bottomed recesses are arranged. By adopting a configuration in which the gate is disposed in the vicinity of one end, the resin injected from the gate into the mold cavity can easily spread over the entire cavity. Thus, as described above, a casing constituent member having a row of bottomed recesses and a resin injection portion is obtained.

  According to the electronic device according to the present invention, it is possible to suppress water from entering the storage chamber formed in the housing.

It is the perspective view which showed the closed state of the mobile telephone which concerns on one Embodiment of this invention. It is the perspective view which showed the state which this mobile telephone opened. It is the disassembled perspective view which looked at the 2nd cabinet which comprises this mobile telephone from the cover member side. It is the disassembled perspective view which looked at this 2nd cabinet from the LCD side. It is a perspective view which shows the cabinet main body which comprises this 2nd cabinet. It is a top view of this cabinet main body. It is sectional drawing which follows the CC line shown in FIG. It is sectional drawing which follows the DD line | wire shown in FIG. It is sectional drawing which follows the EE line shown in FIG. It is a perspective view for demonstrating the structure of a metal mold | die, and the positional relationship of this metal mold | die and a resin molded product.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
The cellular phone according to an embodiment of the present invention is configured by connecting a first cabinet (1) and a second cabinet (2) so as to be opened and closed by a hinge mechanism (3), as shown in FIGS. ing. The first cabinet (1) is provided with a plurality of operation buttons (11) on the surface facing the second cabinet (2), and the second cabinet (2) is facing the first cabinet (1). The LCD (51) is installed in Further, as shown in FIG. 1, a second LCD (52) visible from the side opposite to the surface facing the first cabinet (1) is disposed in the second cabinet (2).

  As shown in FIG. 3, the second cabinet (2) includes a resin cabinet main body (6) having an opening (61) serving as a storage chamber for the second LCD (52), and the cabinet main body (6). The cover member (7) is bonded to the surface opposite to the facing surface and closes the opening (61). In the present embodiment, as shown in FIG. 7, the surface of the cabinet body (6) is bonded to the surface of the cabinet body (6) by bonding the surface of the cabinet body (6) and the back surface of the cover member (7) with the double-sided adhesive tape (21). The cover member (7) is joined.

  As shown in FIG. 5, the cabinet body (6) is provided with a plurality of through holes (62) penetrating the cabinet body (6) to the back surface, and a plurality of through holes (62) are formed on the surface of the cabinet body (6). A bottomed recess (63) is provided. The plurality of through holes (62) and the bottomed recesses (63) are scattered all over the surface of the cabinet body (6) including the periphery of the opening (61) serving as a storage chamber.

The plurality of through-holes (62) and the bottomed recess (63) are formed by protruding lattice-like ribs (64) on the surface of the cabinet body (6) as shown in FIG. Accordingly, the plurality of through holes (62) and the bottomed recess (63) are perpendicular to the length direction (91) from the base end to the tip end of the cabinet body (6) and the length direction (91). Are arranged in rows in the width direction (92) along the surface of the cabinet body (6).
As shown in FIG. 5 and FIG. 7 to FIG. 9, the row composed of the through-holes (62) and the bottomed recesses (63) is mostly composed of the through-holes (62) and the bottomed recesses (63). As shown in FIG. 5 and FIG. 8, the remaining portion is a row (6a) arranged alternately, and a plurality of bottomed recesses (63) are arranged in a row without interposing through holes (62) therebetween. It is a row (6b) lined up.

Further, as shown in region A of FIG. 5, the plurality of bottomed recesses (63) are arranged so as to surround each through hole (62). Further, as shown in FIG. 5B, a plurality of bottomed recesses (65) are provided around the screw hole (65) provided separately from the through hole (62) so as to surround the screw hole (65). 63) is arranged.
The through holes (62) and the bottomed recesses (63) are arranged over the entire surface so that the number per unit area of the surface of the cabinet body (6) is substantially equal.

  As shown in FIG. 4 and FIGS. 7 to 9, a metal reinforcing plate (4) that supplements the strength of the cabinet body (6) is adhered and fixed to the back surface of the cabinet body (6). The plurality of through-holes (62) established in) are closed by the reinforcing plate (4).

  The cabinet body (6) having the plurality of through holes (62) and the bottomed recesses (63) described above is a resin molded product molded using a mold 8 as shown in FIG. As shown in FIG. 10, the mold 8 is composed of a frame portion (not shown) having a cavity into which resin is injected, and a pedestal (84) for installing the reinforcing plate (4). A thick columnar first protrusion (81) for forming an opening (61) serving as a storage chamber on a surface of the inner surface of the pedestal (81) facing the installation surface of the reinforcing plate (4); A plurality of thin columnar second protrusions (82) for forming the through holes (62), and a plurality of thin columnar third protrusions (not shown) for forming the bottomed recess (63) Is formed.

The plurality of second protrusions (82) and the third protrusions are arranged in a row, and in most of the rows, the second protrusions (82) and the third protrusions are alternately arranged. The remaining portion is a row in which a plurality of third protrusions are arranged in a line without interposing the second protrusion (82) therebetween.
Thus, in the resin molded product, the second protrusions (82) and the third protrusions that are alternately arranged in rows and the plurality of through holes (62) that are alternately arranged in rows (6a) are provided. The bottom protrusion (63) is formed, and the third protrusions arranged in a line without interposing the second protrusions (82) are arranged in a line without interposing the through holes (62). A plurality of bottomed recesses (63) forming (6b) are formed.

  The second protrusion (82) is larger in height than the third protrusion, and is reinforced between the tip surface of the second protrusion (82) and the installation surface of the base (84) during molding. It has a height dimension capable of sandwiching the plate (4). Therefore, at the time of mold forming, the reinforcing plate (4) hardly deviates from a predetermined position to be fixed in the resin molded product.

  The frame portion of the mold 8 is further formed with a gate (85) for injecting resin into the cavity. The gate (85) does not interpose the second protrusion (82). The third protrusions arranged in a row are arranged at positions near one end of the row.

At the time of molding, the resin flows into the cavity from the gate (85) by injecting the resin into the cavity from the gate (85), but at the position where the through hole (62) is formed. Since the second protrusion (82) whose tip surface is in contact with the reinforcing plate (4) is disposed, the flow of resin is obstructed by the second protrusion (82).
On the other hand, since a third projection having a height smaller than that of the second projection (82) is disposed at the position where the bottomed recess (83) is formed, A space through which resin can pass is formed between the reinforcing plate (4). Therefore, the resin flow is hardly disturbed by the third protrusion.

  Therefore, the resin injected into the cavity of the mold 8 from the gate (85) can be obtained by configuring the mold 8 so that the gate (85) is disposed in the vicinity of one end of the row of the third protrusions. It becomes easy to spread over the whole cavity.

  In the resin molded product molded using the mold 8 as described above, a plurality of bottomed recesses (63) are arranged in a row (6b) with no through-holes (62) interposed therebetween. As shown in FIGS. 6 and 8, a resin injection portion (66) that is a trace of the gate (85) in which the resin is injected into the mold 8 is formed at a position near one end of the row (6b). Will be.

  In the mobile phone described above, the back surface of the cover member (7) is in close contact with the surface of the cabinet body (6) when the cover member (7) is joined to the cabinet body (6) of the second cabinet (2). There is a slight gap between them due to variations in finishing accuracy. Therefore, when water enters the gap from the outside due to water adhering to the cellular phone, the water moves on the surface of the cabinet body (6) toward the opening (61).

  However, since the plurality of through holes (62) and bottomed recesses (63) are scattered on the entire surface of the cabinet body (6) including the periphery of the opening (61), It enters the through hole (62) or the bottomed recess (63) and moves along these inner walls, or accumulates in the entered through hole (62) or bottomed recess (63). Further, even if the water that has entered the through hole (62) or the bottomed recess (63) flows out of the through hole (62) or the bottomed recess (63) due to a change in the posture of the mobile phone, Water will reenter the other through hole (62) or the bottomed recess (63).

  Therefore, since the infiltrated water must pass through the plurality of through holes (62) or the bottomed recess (63) before reaching the opening (storage chamber), the second LCD (52) is stored. It is difficult to reach the opening (61). Therefore, it is possible to suppress the intrusion of water into the opening (61), and as a result, the failure of the second LCD (52) due to water is prevented.

In the mobile phone, since both the through holes (62) and the bottomed recesses (63) are scattered on the surface of the cabinet body (6), the bottomed recesses (63) are formed at the positions. As compared with the configuration in which the through hole (62) is formed, it is possible to suppress the strength of the cabinet body (6) from being lowered.
Furthermore, as described above, the plurality of through-holes (62) and the bottomed recesses (63) are scattered on the surface of the cabinet body (6), so that it is difficult to cause sink marks on the surface. Therefore, a large gap is unlikely to occur between the front surface of the cabinet body (6) and the back surface of the cover member (7).

Furthermore, in the mobile phone, a plurality of bottomed recesses (63) having high strength are arranged so as to surround each through hole (62) and screw hole (65) that are likely to have low strength. The strength of the cabinet body (6) can be maintained high.
In the mobile phone, the through hole (62) and the bottomed recess (63) each extend over the entire surface of the cabinet body (6) so that the number per unit area of the cabinet body (6) is substantially uniform. Since it is arranged, there is no bias in the strength of the cabinet body (6).

In addition, each part structure of this invention is not restricted to the said embodiment, A various deformation | transformation is possible within the technical scope as described in a claim. In the above embodiment, the plurality of through holes (62) and the bottomed recesses (63) are respectively scattered over the entire surface of the cabinet body (6). 62) and bottomed recesses (63) may be interspersed.
Further, in the above embodiment, the through holes (62) and the bottomed recesses (63) are arranged in a row in which most of them are alternately arranged, but the present invention is not limited to this.

  Furthermore, in the above embodiment, the reinforcing plate (4) is tightly fixed to the back surface of the cabinet body (6), but the present invention is not limited to this. For example, the reinforcing plate (4) There may be no configuration. Even in this configuration, if a small amount of water enters, the water travels along the outer peripheral surface of the cabinet body (6). Therefore, even if the water wraps around the back surface of the cabinet body (6), the LCD (51 It is difficult to affect other parts such as). Moreover, in order for the water to reach the opening (61), the water must pass through the plurality of through holes (62) or the bottomed recess (63), so that the water reaches the opening (61). Therefore, the distance required for the second LCD (52) is increased, so that water does not easily reach the opening (61). Therefore, it is possible to suppress water from entering the opening (61).

  Various configurations employed in the above-described mobile phone can be employed in various electronic devices other than the mobile phone. In addition, the opening (61) serving as the storage chamber may store not only the second LCD (52) but also other various components.

(1) First cabinet
(2) Second cabinet
(3) Hinge mechanism
(4) Reinforcement plate (back member)
(52) Second LCD (component)
(6) Cabinet body (case component)
(61) Opening
(62) Through hole
(63) Bottomed recess
(64) Ribs
(66) Resin injection part
(7) Cover member
(8) Mold
(85) Gate

Claims (7)

In an electronic apparatus comprising a casing constituent member and a cover member joined to the surface of the casing constituent member, the casing constituent member is covered on the surface of the casing constituent member covered by the cover member. A plurality of through-holes penetrating to the surface and a plurality of bottomed recesses recessed in the surface are scattered, and at least in a part of the regions, the through-holes and the bottomed recesses are alternately arranged. an electronic apparatus, characterized in that out. An opening serving as a component storage chamber is formed on the surface of the casing component member, the opening is closed by the cover member, and the plurality of through holes and the plurality of bottomed recesses are formed around the opening. The electronic component according to claim 1, wherein The electronic device according to claim 1, wherein a back member that closes the through hole is in close contact with a back surface of the casing constituent member. The electronic apparatus according to claim 3 , wherein the housing member is made of resin, and the back member is made of metal, and the back member is closely fixed to a back surface of the housing member. . 5. The electronic device according to claim 1, wherein the plurality of through-holes and the bottomed recess are formed by projecting grid-like ribs on a surface of the casing constituent member. The electronic device according to any one of claims 1 to 5 , wherein the plurality of bottomed recesses are arranged so as to surround each through hole or a screw hole formed in the casing constituent member . The casing constituent member is a resin molded product using a mold, and at least a part of the plurality of bottomed recesses are arranged in a line without interposing the through hole therebetween, The electronic device according to any one of claims 1 to 6 , wherein a resin injection portion which is a trace of a gate in which resin is injected into the mold is formed at a position near one end of the row of bottomed recesses.

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