JP2012199183A - Portable device, and vehicular keyless entry portable transmitter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable device capable of holding a circuit module on an upper case, even when a lower case is removed from the upper case.SOLUTION: A portable device of the present invention includes: an operation button 4; an upper case 2 having a through-hole in which the operation button 4 is disposed and opening at a lower end part; a lower case 3 opening at an upper part and integrated with the upper case 2 to form a housing; a circuit module 5 equipped with a push switch 56 corresponding to the operation button 4; and a holding rubber 6 having a plurality of end portions and fixing spaces between the plurality of the end portions to the upper case 2. The holding rubber 6 passes through a space projecting the operation button 4 from the upper case 2 side to the lower case 3 side, and holds the circuit module 5 between the holding rubber 6 and the upper case 2.

Description

  The present invention relates to a portable device such as a vehicle keyless entry portable transmitter for holding a circuit module inside a casing.

  2. Description of the Related Art Conventional portable devices include a circuit module in which a printed circuit board is covered with a sealing rubber, and the circuit module is held by sandwiching and pressing the sealing rubber of the circuit module between an upper case and a lower case.

  For example, Patent Document 1 and Patent Document 2 are known as prior art documents related to the invention of this application.

Japanese Patent Laid-Open No. 9-8474 JP 2001-339177 A

  In the conventional portable device, when the lower case is removed from the upper case at the time of battery replacement or the like, the holding by the upper case and the lower case of the sealing rubber is released. In the conventional portable device, the upper case does not hold the rubber sheet alone, so that when the lower case is removed from the upper case and the operation button is touched, the circuit module and the operation button There was a problem of falling from the upper case.

  The circuit module is provided with a printed circuit board, and if dropped, there is a possibility that an electronic component or the like mounted by the impact may be damaged.

  On the other hand, a configuration is also known in which a lid is provided on a lower case of a portable device, and a battery is mounted by opening and closing the lid. However, such a portable device creates a gap around the lid and impairs waterproofness. Because there is a fear, it is not preferable. Therefore, it is common to replace the battery by removing the lower case from the upper case without providing an opening / closing part such as a lid.

  The present invention has been made to solve the conventional problems, and an object of the present invention is to provide a portable device that can hold a circuit module in an upper case even when the lower case is removed from the upper case.

  The present invention includes an operation button, an upper case having a through hole for arranging the operation button and having a lower end opened, a lower case having an upper end opened and integrated with the upper case to form a housing, A circuit module having a push switch corresponding to the operation button, and a holding rubber having a plurality of ends and fixing the plurality of ends to the upper case, the holding rubber holding the operation button It is a portable device that passes through a space projected from the upper case side to the lower case side and holds the circuit module between the upper case.

In the present invention, since the holding rubber whose both ends are fixed to the upper case holds the circuit module between the upper case, the circuit module can be held in the upper case even when the lower case is removed from the upper case. This is an effect.

The perspective view of the portable apparatus in one embodiment of this invention The disassembled perspective view of the portable apparatus in one embodiment of this invention The disassembled perspective view of the portable apparatus in one embodiment of this invention The perspective view of the upper case in one embodiment of the present invention The perspective view of the portable apparatus at the time of removing the lower case in one embodiment of this invention The disassembled perspective view of the circuit module in one embodiment of this invention The perspective view which looked at the portable apparatus in one embodiment of this invention from the pressing surface side of the operation button The perspective view which looked at the portable apparatus in one embodiment of this invention from the pressing surface side of the operation button

(Embodiment 1)
Hereinafter, a portable device according to an embodiment of the present invention will be described with reference to FIGS.

  First, the schematic structure of the portable device 1 according to the first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of a portable device according to Embodiment 1 of the present invention, and FIGS. 2 and 3 are exploded perspective views.

  The portable device 1 is, for example, a vehicle keyless entry portable transmitter that can lock or unlock a vehicle by pressing an operation button.

  As shown in FIG. 1, the portable device 1 includes an upper case 2 whose lower end is open and a lower case 3 whose upper end is open to form a housing, and a circuit described later in this internal space. A module 5 is provided. The upper case 2 has a through hole 21, and the operation button 4 is disposed in the through hole 21.

  Next, the positional relationship used when describing the portable device according to Embodiment 1 of the present invention will be described. The X axis and the Y axis in FIG. 1 are axes orthogonal to each other, and the plane including the X axis and the Y axis is a plane substantially parallel to the pressing surface of the operation button 4. Further, the Z axis in FIG. 1 is an axis perpendicular to the X axis and the Y axis, and when using the operation button 4, the direction in which the pressing surface of the operation button 4 is pressed is a negative direction. .

  As shown in FIGS. 2 and 3, the upper case 2, the operation button 4, the circuit module 5, the holding rubber 6, and the lower case 3 are assembled in this order.

  The operation buttons 4 (operation buttons 4a and 4b) are disposed in the through holes 21 (the through holes 21a and 21b) of the upper case 2, and the pressing surfaces thereof are exposed to the outside of the upper case 2 (in the positive direction of the Z axis). The operation button 4 has, for example, a circular shape. In this case, the through hole 21 also has a circular shape.

  As will be described later, the circuit module 5 includes a push switch 56 corresponding to the operation button 4 (operation buttons 4a and 4b) on the surface facing the upper case 2. Furthermore, the circuit module 5 includes a battery socket 51 on the surface facing the lower case 3. A battery 7 is inserted into the battery socket 51.

  The holding rubber 6 has a plurality of end portions, and the plurality of end portions are fixed to the hooks 22 of the upper case 2, and holds the circuit module 5 between the upper case 2.

  The holding rubber 6 is configured to pass through a space where the operation button 4 is projected from the upper case 2 side to the lower case 3 side, that is, a space where the operation button 4 is projected in the negative direction of the Z axis.

  The structure of the upper case 2 will be described in detail with reference to FIGS. 4 and 5. 4 is a perspective view of the upper case 2, and FIG. 5 is a perspective view of the portable device 1 when the lower case 3 is removed.

  As shown in FIG. 4, the upper case 2 has hooks 22 (hooks 22 a, 22 b, 22 c, and 22 d) for fixing the end portions of the holding rubber 6. The holding rubber 6 has a cross shape, and its end is formed in a ring shape. The holding rubber 6 is fixed to the upper case 2 by the ring portion of the holding rubber 6 hanging on the hook 22.

  FIG. 5 is a perspective view when only the lower case 3 is removed from the portable device 1 of FIG. 1. An end portion of the holding rubber 6 is fixed to the upper case 2 by a hook 22, and the circuit module 5 is held by the upper case 2 and the holding rubber 6. More specifically, the holding rubber 6 holds the circuit module 5 between the holding module 6 and the upper case 2 by closely contacting the surface of the circuit module 5 facing the lower case 3.

  The holding rubber 6 is in contact with a portion where the battery socket 51 is not mounted on the surface facing the lower case 3 of the circuit module 5. When the holding rubber 6 contacts the battery socket 51, it is necessary to remove the holding rubber 6 when replacing the battery.

  By doing in this way, when the lower case 3 is removed at the time of battery replacement, there is an effect that the holding rubber 6 does not hinder battery replacement.

  The holding rubber 6 has elasticity. The holding rubber 6 can be made of, for example, silicon rubber, ethylene propylene diene rubber, butyl rubber, natural rubber, or elastomer.

  Since the holding rubber 6 has elasticity, the circuit module 5 attached to the upper case 2 can be reliably held, and transmission of the vibration to the circuit module 5 can be reduced even when the portable device 1 receives vibration. . Due to the holding rubber 6 having elasticity, it is also possible to absorb variations in the dimensions of the components.

  Next, the structure of the circuit module 5 will be described in detail with reference to FIG. FIG. 6 is an exploded perspective view of the circuit module 5.

  The circuit module 5 is configured by assembling a rubber sheet 54, an inner case cover 55, a printed circuit board 57, and an inner case 58 in this order.

  More specifically, the inner case 58 and the inner case cover 55 sandwich the printed circuit board 57, and the rubber sheet 54 is disposed so as to cover them. A flange portion that is sandwiched between the upper case 2 and the lower case 3 is provided at the peripheral edge of the opening end of the rubber sheet 54. This flange portion prevents raindrops and dust from entering the printed circuit board 57.

  The rubber sheet 54 also functions as a buffer member, and also plays a role of preventing the printed circuit board 57 from being damaged by external vibration, impact when dropped, or the like.

  The rubber sheet 54 has the compression part 53 in an outer edge part. The upper case 2 and the lower case 3 squeeze the compression portion 53 to prevent intrusion of water or the like from the outside.

  Various electronic components are mounted on the printed circuit board 57. For example, when the portable device 1 is used for a vehicle keyless entry portable transmitter, electronic components such as a microcomputer and a memory are mounted.

  The printed circuit board 57 further includes push switches 56 (56a, 56b) on the surface facing the upper case 2.

  The push switch 56 corresponds to the operation button 4. The push switch 56 is mounted at a position where the operation button 4 comes in the positive direction of the Z axis when the circuit module 5 is assembled to the upper case 2.

  Further, the circuit module 5 includes a battery socket 51 on the surface facing the lower case 3. A battery 7 is inserted into the battery socket 51. The battery 7 is, for example, a button battery. The electrical energy stored in the battery 7 is supplied to various electronic components mounted on the printed circuit board 57.

  When the lower case 3 is removed from the upper case 2, the battery socket 51 and the battery 7 are exposed, so that the battery 7 can be replaced.

  Thus, by providing the battery socket 51 on the surface opposite to the surface on which the push switch 56 of the circuit module 5 is mounted, the battery can be easily replaced when the lower case 3 is removed during battery replacement. Become.

  In addition, a groove 52 is formed in the inner case 58 constituting the circuit module 5 on the surface in close contact with the holding rubber 6. By having the groove 52, the holding rubber 6 can be reliably positioned. It is also possible to prevent the holding rubber 6 from being displaced after assembly.

  The positional relationship between the operation button 4 and the holding rubber 6 will be described in detail with reference to FIG. FIG. 7 is a perspective view of the portable device 1 as seen from the pressing surface side of the operation button 4.

  As shown in FIG. 7A, the holding rubber 6 is positioned on a straight line (straight line A and straight line B) connecting the end portions of the holding rubber 6 fixed to the upper case 2, and holds the circuit module 5. Yes.

  A straight line (straight line A and straight line B) connecting a plurality of ends of the holding rubber 6 fixed to the upper case 2 has a center of gravity G1 viewed from the pressing surface side of the operation button 4a from the upper case 2 side to the lower case 3 side. It is in a position that passes on the line projected to the side (negative direction of the Z axis). The straight line A and the straight line B are crossed on a line obtained by projecting the center of gravity G1 from the upper case 2 side to the lower case 3 side.

  Although it is conceivable to hold all the surfaces facing the lower case 3 of the circuit module 5 with the holding rubber 6, the holding rubber 6 is often used. When the operation button 4a is touched when the lower case 3 is removed at the time of battery replacement, the center of gravity G1 is the point at which force is most transmitted from the operation button 4a to the circuit module 5. By holding this point with the holding rubber 6, there is an effect that the holding of the circuit module 5 can be maintained while reducing the volume of the holding rubber 6, that is, the amount of material used.

  The holding rubber 6 can also be configured as shown in FIG. In FIG. 7B, one wide holding rubber 6 is positioned in the direction of the straight line C at the center of gravity G1 of the operation button 4a, and holds the circuit module 5.

In FIG. 7B, the straight line connecting the plurality of ends of the holding rubber 6 fixed to the upper case 2 has the largest area of at least the pressing surface among the plurality of operation buttons (operation button 4a, operation button 4b). The center of gravity G1 viewed from the pressing surface side of a certain operation button 4a passes through a line projected from the upper case 2 side to the lower case 3 side (the negative direction of the Z axis).

  The operation button having the maximum area of the pressing surface is the operation button most touched when the lower case 3 is removed from the upper case 2. It is effective for holding the circuit module 5 that at least the holding rubber 6 passes over the projection line of the center of gravity G1 viewed from the pressing surface side of the operation button 4a having the maximum pressing surface area.

  Also, by using one holding rubber 6, there is an effect that the holding of the circuit module 5 can be maintained while reducing the amount of the holding rubber 6 used. At this time, since the holding force is reduced by changing the holding rubber 6 from two to one, it is possible to increase the holding force by widening the holding rubber.

  Furthermore, the straight line C passes not only on the projection line of the center of gravity G1 of the operation button 4a but also on the projection line of the center of gravity G2 of the operation button 4b.

  That is, the straight line C connecting the plurality of ends of the holding rubber 6 fixed to the upper case 2 has the center of gravity (G1 and G2) viewed from the pressing surface side of the plurality of operation buttons (operation button 4a, operation button 4b). It passes through the line projected from the upper case 2 side to the lower case 3 side (negative direction of the Z-axis).

  In this way, the holding of the circuit module 5 can be maintained while reducing the amount of the holding rubber 6 used for a plurality of operation buttons that may be touched by a person when the lower case 3 is removed from the upper case 2. There is an effect.

As described above, according to the present invention, since the holding rubber having a plurality of ends fixed to the upper case holds the circuit module between the upper case, the circuit module is held in the upper case even when the lower case is removed from the upper case. The effect that it can be done is produced. As a result, battery replacement work and the like can be performed efficiently and safely.
(Modification 1)
Next, a modification of the mobile device 1 according to the present embodiment will be described with reference to FIG. FIG. 8 is a perspective view of the portable device 1 as seen from the pressing surface side of the operation button 4.

In FIG. 8A, the circuit module 5 is held by an H-type holding rubber 6. The holding rubber 6 is positioned on a straight line (straight line D and straight line E) connecting the end portions of the holding rubber 6 fixed to the upper case 2 and holds the circuit module 5.
(Modification 2)
As shown in FIG. 8 (b), the holding rubber 6 can also be constituted by a rectangular portion and a portion extending from one side of the rectangular portion to the end portion. The circuit module 5 is held by the straight portion F and the L-shaped portion G that constitute a part of the rectangular portion of the holding rubber 6.
(Modification 3)
Moreover, as shown in FIG.8 (c), it is also possible to comprise the holding rubber 6 by the circular part and the part which extends the holding rubber 6 from a part of this circular part and reaches the end part. The circuit module 5 is held at the curve H and curve I portions of the holding rubber 6.

As shown in Modification 1 to Modification 3, the shape of the holding rubber 6 can be considered variously. In any case, the holding rubber 6 has a plurality of ends, and the plurality of ends are fixed to the upper case 2. In addition, the holding rubber 6 is common in that it passes through a space where the operation button 4 is projected from the upper case 2 side to the lower case 3 side. If this condition is satisfied, the shape of the holding rubber 6 can be freely set according to the layout of the operation buttons 4 and the like.

  In all of Modification Examples 1 to 3, the holding rubber 6 passes through the projection line of the center of gravity G1 of the operation button 4a and the projection line of the center of gravity G2 of the operation button 4b. By doing in this way, there exists an effect that the holding | maintenance of the circuit module 5 can be maintained, reducing the quantity which uses the holding | maintenance rubber 6. FIG.

  In the present embodiment, the shape of the pressing surface of the operation button 4 is described as being circular, but the present invention is not limited to this. The present invention can be applied to a portable device having operation buttons of various shapes such as other polygonal shapes such as a quadrangular pressing surface, a shape having a straight line portion and a curved portion.

  The present invention is useful as a portable device used for a vehicle keyless entry portable transmitter or the like.

DESCRIPTION OF SYMBOLS 1 Mobile device 2 Upper case 21 Through-hole 22 Hook 3 Lower case 4 Operation button 5 Circuit module 51 Battery socket 52 Groove 53 Compression part 54 Rubber sheet 55 Inner case cover 56 Push switch 57 Printed circuit board 58 Inner case 6 Holding rubber 7 Battery

Claims (10)

An operation button;
An upper case having a through hole for arranging the operation button and having a lower end opened;
A lower case whose upper end is open and integrated with the upper case to form a housing;
A circuit module including a push switch corresponding to the operation button;
A holding rubber having a plurality of ends and fixing between the plurality of ends to the upper case;
The holding rubber passes through a space in which the operation button is projected from the upper case side to the lower case side, and holds the circuit module between the upper case and the portable device. The portable device according to claim 1, wherein the holding rubber is positioned on a straight line connecting ends of the holding rubber fixed to the upper case. The portable device according to claim 1, wherein the circuit module further includes a battery socket on a surface facing the lower case. The portable device according to claim 1, wherein the holding rubber is in contact with a portion where the battery socket is not mounted on a surface of the circuit module facing the lower case. The straight line connecting a plurality of ends of the holding rubber fixed to the upper case passes through a line projected from the upper case side to the lower case side with respect to the center of gravity viewed from the pressing surface side of the operation button. 2. The portable device according to 2. The portable device includes a plurality of operation buttons,
The straight line connecting between the plurality of ends of the holding rubber fixed to the upper case has a center of gravity as viewed from the pressing surface side of the operation button having the largest pressing surface area among the plurality of operation buttons. The portable device according to claim 5, wherein the portable device passes on a line projected from the side to the lower case side. The portable device includes a plurality of operation buttons,
A straight line connecting a plurality of ends of the holding rubber fixed to the upper case passes through a line projected from the upper case side to the lower case side of the center of gravity viewed from the pressing surface side of the plurality of operation buttons. The portable device according to claim 5. The portable device according to claim 1, wherein the holding rubber holds the circuit module between the upper case by closely contacting a surface of the circuit module facing the lower case. The portable device according to claim 8, wherein a groove is formed on a surface of the circuit module that is in close contact with the holding rubber. An operation button;
An upper case having a through hole for arranging the operation button and having a lower end opened;
A lower case whose upper end is open and integrated with the upper case to form a housing;
A circuit module including a push switch corresponding to the operation button;
A holding rubber having a plurality of ends and fixing between the plurality of ends to the upper case;
The holding rubber passes through a space in which the operation button is projected from the upper case side to the lower case side, and is a keyless entry portable transmitter for a vehicle that holds the circuit module between the upper case and the circuit module.