JP2014135179A - Portable terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To exhibit waterproof function reliably by suppressing the wobbling of a key top, while preventing a push-in force required for causing reaction of a push switch from increasing.SOLUTION: In a portable telephone having a push button 9, the key top 10 of which is viewed from an opening 3b provided in the front side cabinet 3, the key top 10 long in the other hand is provided with a push switch 6 connected electrically with a circuit board 5 in the front side cabinet 3, and a waterproof sheet 8 having a push portion 8a which pushes the push switch 6 by abutting against the push switch 6 when the key top 10 is pushed. At both ends of the key top 10 in the longitudinal direction, cushion members 13 abutting against the rear surface 3c on the peripheral edge of the opening are provided.

Description

  The present invention relates to a portable terminal having a push button that a key top looks through an opening provided in a housing.

  Conventionally, as this type of portable terminal, for example, having a switch button device of Patent Document 1, a packing is provided in a pressure contact state between a collar provided on the button and the back surface of the peripheral edge of the opening, and the button is a support. Cantilever support.

JP 2004-87329 A

  However, the portable terminal disclosed in Patent Document 1 has a problem in that it requires a large installation space because a complicated support structure is provided to keep the packing in a pressure contact state at all times. If a sufficient space is not maintained on the support structure side, when the preload of the packing is increased, the pushing force for reacting the push-type switch is increased, and the feeling when the key top is pushed is deteriorated.

  On the other hand, if the packing is not pressed sufficiently against the back of the periphery of the opening, especially when the key top is long on one side, the key top will wobble in the longitudinal direction, and the vibration will affect the operation of the precision circuit, which may be uncomfortable. There is a problem that vibration noise is generated or the waterproof and dustproof effects cannot be exhibited.

  The present invention has been made in view of such a point, and an object thereof is to prevent a key top from wobbling and to reliably exhibit a waterproof function while preventing an increase in pushing force.

  In order to achieve the above object, in the present invention, elastic members are provided at both longitudinal ends of the key top.

Specifically, in the first invention,
Targeting mobile terminals with push buttons that a long key top looks into from one of the openings provided in the housing,
The mobile device
A pressure switch electrically connected to the circuit board in the housing;
A waterproof sheet having a pressing portion that contacts the pressing switch and presses the pressing switch when the key top is pressed;
An elastic member provided at both ends in the longitudinal direction of the key top and abutting against the back surface of the peripheral edge of the opening.

  According to said structure, since the elastic member is provided in the longitudinal direction both ends of the key top, and is made to contact | abut to the opening part periphery back surface, a key top does not wobble in a longitudinal direction. Further, since the waterproof sheet is provided between the key top and the press switch, there is no need to press the elastic member with a large force for waterproofing. For this reason, since a complicated support structure is not required, it can be arranged even in a small space.

  As described above, according to the present invention, the elastic member that contacts the back of the periphery of the opening is provided at both longitudinal ends of the key top, and the waterproof sheet having the pressing portion is provided between the key top and the pressing switch. As a result, the wobbling of the key top can be suppressed and the waterproof function can be reliably exhibited while avoiding an increase in the pushing force required for reacting the push switch.

FIG. 3 is an enlarged cross-sectional view taken along a line II in FIG. The principal part of the mobile telephone which concerns on embodiment of this invention is shown, (a) is the perspective view seen from the front side, (b) is a side view. It is a disassembled perspective view which shows a front side cabinet, a circuit board, and a push button. It is the IV-IV line expanded sectional view of FIG.2 (b). FIG. 6 is a view corresponding to FIG. 1 according to a first modification of the embodiment. FIG. 5 is a diagram corresponding to FIG. 4 according to Modification 1 of the embodiment. FIG. 6 is a view corresponding to FIG. 1 according to a second modification of the embodiment. It is FIG. 1 equivalent view which concerns on the modification 3 of embodiment. It is FIG. 1 equivalent view which concerns on the modification 4 of embodiment.

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

  2A and 2B show a main part of the mobile phone 1 as a mobile terminal according to the embodiment of the present invention, in which FIG. 2A is a perspective view seen from the front side, and FIG. 2B is a right side view. FIG. 1 is an enlarged cross-sectional view taken along line II of FIG. 2B, and FIG. 3 is an exploded perspective view showing a front cabinet, a circuit board, and a push button. FIG. 4 is an enlarged sectional view taken along line IV-IV in FIG. Although not shown in detail, the mobile phone 1 includes a front cabinet 3 as a housing that houses the display unit on the front side, a back cabinet 4 coupled to the back side of the front cabinet 3, and the back side. And a rear cover that covers the back surface of the cabinet 4. The front cabinet 3 is made of, for example, a substantially rectangular resin molded product in which a metal frame 3a is insert-molded.

  The cellular phone 1 has a push button 9 that the key top 10 looks through from an opening 3 b provided in the front cabinet 3. Specifically, as shown in FIG. 1, a circuit board 5 for controlling the mobile phone 1 is accommodated on the back side of the metal frame 3 a of the front cabinet 3. A push-type switch 6 is provided on the back surface of the circuit board 5 and is electrically connected to the circuit board 5. A rectangular opening 3 b is formed in the front cabinet 3 in accordance with the push switch 6. As shown in FIG. 3, a button accommodating portion 7 for accommodating the key top 10 and the like is integrally formed on the left and right inner sides of the opening 3 b in the front cabinet 3. The button accommodating portion 7 includes a partition wall 7a spaced a predetermined distance from the periphery of the opening 3b, and a circular through hole 7b opened in the partition wall 7a corresponding to the switch 6a of the push-type switch 6.

  As shown in FIG. 1, a pressing portion 8 a of a waterproof sheet 8 made of, for example, a silicon rubber molded product is fitted into the through hole 7 b. For example, a ball member 8b is insert-molded in the pressing portion 8a (the ball member 8b may not be provided). A reinforcing member 8c is insert-molded around the through hole 7b to be reinforced.

  On the other hand, the key top 10 includes a resin molded product, a metal molded product, and the like, and includes a rectangular parallelepiped key top main body 10a that is vertically long and a presser 10b that is provided integrally with the key top main body 10a. . When the key top 10 is pressed, the pusher 10b abuts on the pressing switch 6 via the ball member 8b and presses the pressing switch 6. For example, rectangular flanges 12 are integrally projected at both ends (upper and lower ends) of the key top body 10a in the longitudinal direction. The pusher 10b may be provided separately from the key top body 10a, and may be insert-molded in the waterproof sheet 8 instead of the ball member 8b. As shown in FIG. 4, a flat surface 12 a parallel to the opening peripheral edge back surface 3 c and an inclined surface 12 b inclined with respect to the flat surface 12 a are provided on the opening peripheral edge back surface 3 c side of the flange 12. ing. A cushion member 13 as an elastic member that is in contact with the peripheral edge back surface 3c of the opening is attached to the flat surface 12a and the inclined surface 12b. The cushion member 13 is made of, for example, a resin sheet having a foam layer, and is attached with a double-sided tape (not shown). If the thickness of the cushion member 13 is too thick, there is a possibility that the pressing switch 6 will remain ON. Therefore, the cushion member 13 should be compressed so that it does not rattle when the key top 10 is assembled.

  Thus, the cushion members 13 are provided at both longitudinal ends of the key top 10 and are in contact with the opening peripheral edge back surface 3c, so that the key top 10 does not wobble in the longitudinal direction. Further, since the waterproof sheet 8 is provided between the key top 10 and the pressing switch 6, it is not necessary to press the cushion member 13 with a large force for waterproofing. For this reason, since a complicated support structure is not required, the push button 9 can be arranged even in a small space.

  An elastic member is a cushion member 13 attached to the opening peripheral edge back surface 3c side of the flange 12 provided at both longitudinal ends of the key top 10, and the flat surface 12a parallel to the opening peripheral edge back surface 3c on the flange 12; An inclined surface 12b that is inclined with respect to the flat surface 12a is provided, and the cushion member 13 is attached to the flat surface 12a and the inclined surface 12b. The cushion member 13 affixed to the inclined surface 12 b moderately reduces the repulsive force of the cushion member 13, so that a complicated support structure is not necessary, and the key top 10 is cushioned when assembled to the front cabinet 3. The member 13 is difficult to peel off.

  Therefore, according to the mobile phone 1 according to the present embodiment, the wobbling of the key top 10 can be suppressed and the waterproof function can be surely exhibited while avoiding an increase in the pushing force required to react the push switch 6. it can.

-Modification 1-
5 and 6 show a push button 109 according to the first modification of the embodiment, which is different from the above embodiment in that the flange 112 and the elastic member are different. In the following modifications, the same portions as those in FIGS. 1 to 4 are denoted by the same reference numerals, and detailed description thereof is omitted.

  The elastic member of this modification is an elastomer member 113 that is integrally formed on the opening peripheral edge back surface 3c side of the flange 112 that is provided at both ends in the longitudinal direction of the key top 110 and is thinner than the flange 12 of the above embodiment. . The elastomer member 113 is normally in contact with the opening peripheral edge back surface 3c so as to be slightly deformed. Since the elastomer member 113 may be integrally formed with the key top 110 by two-color molding, the number of parts is small and the assembly is extremely easy. Note that the flange 112 does not have to have an inclined surface as in the above embodiment, and if the elastomer member 113 is too thick, the push switch 6 may remain ON. The thickness is such that the top 10 is lightly compressed to the extent that rattling does not occur when the top 10 is assembled.

-Modification 2-
FIG. 7 shows a push button 209 according to the second modification of the embodiment, which is different from the first modification in that the elastic member is different. That is, the elastomer member 213 as an elastic member is tapered toward the opening peripheral edge back surface 3c, and the tip is slightly deformed in the assembled state. The elastomer member 213 may be a substantially quadrangular pyramid as shown in FIG. 7, but may be a substantially conical shape or the like. In this modification, the repulsive force of the elastomer member 213 is moderately reduced, so that a complicated support structure is not required.

-Modification 3-
FIG. 8 shows a push button 309 according to Modification 3 of the embodiment, which is different from the above embodiment in that the flange 312 and the elastic member are different. That is, the elastomer member 313 as an elastic member has a circular hollow shape in cross section, and the flange 312 has a corresponding through hole 312a so that the internal air can escape when the elastomer member 313 is deformed. Even in this modification, the repulsive force of the elastomer member 313 can be further reduced, and a complicated support structure is not required.

-Modification 4-
FIG. 9 shows a push button 409 according to the fourth modification of the embodiment, which is different from the above embodiment in that the key top 410 and the elastic member are different. That is, there is no flange on the key top 410 side, the elastomer member 413 as an elastic member plays the role of a flange, and the arm portion 413a is in contact with the opening peripheral edge back surface 3c. Thus, even if the flange portion is formed of an elastic member, the same effect can be obtained. The elastomer member 413 may be two-color molded with the key top 410 or may be assembled as a separate body.

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

  That is, in the above embodiment, the mobile phone 1 is of a straight type, but a foldable mobile phone in which the first casing and the second casing are connected so as to be foldable and openable, or the first casing. May be a sliding mobile phone connected to the second housing so as to be slidable. Even in this case, the present invention may be applied to the first housing or the second housing in which the push buttons are arranged.

  In the above embodiment, the mobile terminal is the mobile phone 1, but it is a PHS (Personal Handy-phone System), a PDA (Personal Digital Assistant), a smartphone, a personal computer, a mobile tool, an electronic dictionary, a calculator, a game machine, and the like. Also good.

  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. The technical features described in each embodiment can be combined with each other, and a new technical feature can be formed by combining them.

  DESCRIPTION OF SYMBOLS 1 Mobile phone (mobile terminal), 3 Front side cabinet (housing), 3a Metal frame, 3b Opening part, 3c Opening edge periphery, 4 Back side cabinet, 5 Circuit board, 6 Push type switch, 6a switch, 7 Button accommodation Part, 7a partition, 7b through-hole, 8 waterproof sheet, 8a pressing part, 8b ball member, 8c reinforcing member, 9 push button, 10 key top, 10a key top body, 10b pusher, 12 flange, 12a flat surface, 12b Inclined surface, 13 cushion member, 109 button, 110 key top, 112 flange, 113 flange, 209 push button, 213 elastomer member, 309 push button, 312 flange, 312a through hole, 313 elastomer member, 409 push button, 410 key top 413 Ella Tomah member, 413a arm portion

Claims (5)

In a mobile terminal having a push button that a long key top looks into one side from an opening provided in the housing,
A pressure switch electrically connected to the circuit board in the housing;
A waterproof sheet having a pressing portion that contacts the pressing switch and presses the pressing switch when the key top is pressed;
A portable terminal comprising: an elastic member provided at both ends in the longitudinal direction of the key top and in contact with the back surface of the periphery of the opening. The mobile terminal according to claim 1,
The mobile terminal according to claim 1, wherein the elastic member is an elastomer member that is integrally formed on the back side of the periphery of the opening of the flange provided at both ends in the longitudinal direction of the key top. The mobile terminal according to claim 2,
The portable terminal characterized in that the elastomer member is tapered toward the back of the periphery of the opening. The mobile terminal according to claim 3,
The mobile terminal, wherein the elastomer member is hollow. The mobile terminal according to claim 1,
The elastic member is a cushion member that is affixed to the back side of the peripheral edge of the opening of the flange provided at both longitudinal ends of the key top.
The flange has a flat surface parallel to the back surface of the periphery of the opening and an inclined surface inclined with respect to the flat surface, and the cushion member is attached to the flat surface and the inclined surface. A featured mobile terminal.

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