JP2013114766A - Waterproof push button switch member and electronic apparatus with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide both of high waterproofness and a good pressing feeling.SOLUTION: A waterproof push button switch member comprises: a waterproof member 10 having a reinforcing member 50 with shape covering at least a bottom part of a container part 10a; a cover member 30 with a through hole 31 at a position opposed to the container 10a; and a push button 20 that has a key top 22 and a shaft part 23 projecting from the through hole 31 and can be driven toward the container part 10a, and turns on a switch 62 arranged below the container 10a under pressurization from the shaft part 23. The elastic flange part 10b comprises: a first loop-like waterproof rib 13 contacting the cover member 30, projecting from a front side face of the elastic flange part 10b, and continuously formed on an outer periphery of an opening; and a second loop-like waterproof rib 14 contacting a housing 40 having an insertion port 41 for inserting the container part 10 on an inner side than the waterproof member 10, projecting from a rear side face of the elastic flange part 10b, and continuously formed on the outer periphery of the container part 10a.

Description

  The present invention relates to a waterproof push button switch member and an electronic apparatus including the same.

  Recently, there is an increasing demand for a waterproof function for small electronic devices such as mobile phones and portable terminals (PDAs). There are many flooded locations in such equipment, but the main location is a plurality of openings provided to expose the push button to the outside. The flooding from the opening may cause an electrical short inside the device and reduce the reliability of the device. Therefore, in order to prevent such problems from occurring as much as possible, a waterproof structure in which an elastic member is interposed between the push button and the switch on the circuit board inside the device, and a part of the contact portion between the opening and the elastic body is in close contact with each other. Is known (see, for example, Patent Document 1).

  The waterproof structure disclosed in Patent Document 1 includes a cup member made of an elastic material attached to a through-hole so that the opening side faces the outside of the device, and a push button including a shaft portion inserted into the opening of the cup member. And a cylindrical holder made of resin or metal is mounted inside the cup member. Due to the presence of the cylindrical holder, the shape of the cup member can be maintained and the adhesion between the through hole and the cup member can be maintained, and the push button switch member having such a waterproof structure can be easily incorporated into the device. .

JP 2006-344528 A

  However, the conventional waterproof structure as described above has the following problems to be solved. The waterproof structure is mounted on the inner side of a cup member made of an elastic material using a cylindrical holder as a reinforcing member. When the push button is pushed in, the bottom of the cup member extends, and the push button pushes a switch disposed below the bottom over the bottom of the cup member. When the pressing operation of the push button is repeated, the bottom portion of the cup member or the boundary portion between the bottom portion and the side surface is easily broken. As a result, waterproofness is impaired.

  In order to improve the durability of the cup member, a method of excessively increasing the thickness of the bottom part of the cup member is also conceivable, but as the thickness increases, when the switch is pushed over the bottom part by pressing the push button, Another problem is that the feeling of pressing becomes worse.

  The present invention has been made to solve such a problem, and an object of the present invention is to achieve both high waterproofness and good pressing feeling.

  In order to achieve the above object, an embodiment of the present invention comprises an elastic material, one or more container parts that open one side and project to the opposite side of the opening side, and a container made of an elastic material. Waterproofing having a reinforcing member shaped to cover at least the bottom of the container part on the inside, outside or inside of the container part, connected to an elastic flange part formed to extend radially outward from the opening of the part A member, a cover member that is on the outer side of the waterproof member and has a through hole at a position facing the container portion, a key top that protrudes outward from the through hole, and a shaft portion that is inserted into the container portion A pushbutton switch member for waterproofing that includes a push button that can be driven toward the container portion, and that turns on a switch that is disposed below the container portion by the bottom of the container portion that has received pressure from the shaft portion, On the elastic flange A rib in contact with the cover member, which protrudes from the surface on the front side of the elastic flange portion and is formed in a loop-shaped first rib for waterproofing continuously on the outer periphery of the opening, and a container portion on the inner side of the waterproof member A waterproof push-button switch member comprising: a rib in contact with a housing including an insertion opening to be inserted, and a loop-shaped second waterproof rib formed continuously on the outer periphery of the container portion protruding from the back side surface of the elastic flange portion It is.

  Another embodiment of the present invention is the waterproof push button switch member according to the above embodiment, wherein the waterproof first rib and the waterproof second rib are formed opposite to each other in the thickness direction of the elastic flange portion.

  Another embodiment of the present invention is the waterproof pushbutton switch member having a cup shape in which the reinforcing member has a side wall extending on the side surface of the container portion in the above-described embodiment.

  Another embodiment of the present invention is the above-described embodiment, wherein the reinforcing member is a plate-shaped member fixed to the outside of the bottom portion of the container portion, and the laminated body in which the reinforcing member and the elastic member are stacked is the container portion. This is a waterproof push button switch member fixed to the bottom.

  One embodiment of the present invention is an electronic device including any one of the above waterproof push button switch members.

  According to the present invention, both high waterproofness and a good pressing feeling can be achieved.

FIG. 1 is a perspective view of an electronic apparatus including a waterproof pushbutton switch member according to the first embodiment. FIG. 2 is an exploded perspective view of the waterproof pushbutton switch member shown in FIG. FIG. 3 is a perspective view of a waterproof member constituting the waterproof pushbutton switch member shown in FIG. FIG. 4 shows a main cross-sectional view of the waterproof pushbutton switch member according to the first embodiment set in an electronic device and an enlarged view of a part X thereof. FIG. 5 shows a main cross-sectional view of the waterproof member constituting the waterproof push button switch member according to the second embodiment. FIG. 6 shows a main cross-sectional view of a modification of the waterproof member shown in FIG. FIG. 7 shows a main cross-sectional view of the waterproof member constituting the waterproof push button switch member according to the third embodiment. FIG. 8 is a main cross-sectional view of the waterproof member constituting the waterproof pushbutton switch member according to the fourth embodiment. FIG. 9 is a view for explaining an example of a suitable manufacturing process for fixing the reinforcing member shown in FIG. 8 to the container portion. FIG. 10 is a perspective view showing a modified example of the waterproof member shown in FIGS. 2 and 3, and shows a perspective view (A) seen from the front side and a perspective view (B) seen from the back side.

  Next, each embodiment of the waterproof push button switch member and the electronic apparatus including the same will be described with reference to the drawings. In the following description, a mobile communication terminal is illustrated as an electronic device. However, the electronic device is broadly interpreted to include other devices such as a mobile phone device, a remote controller, and a small television receiver.

1. First Embodiment FIG. 1 is a perspective view of an electronic apparatus including a waterproof pushbutton switch member according to a first embodiment.

  The electronic device 1 according to the first embodiment of the present invention includes a recess 2 on the side surface. The recess 2 has a form in which the waterproof pushbutton switch member 3 according to the first embodiment can be fitted. In addition, the recessed part 2 is not limited to the side surface of the electronic device 1, and may be formed in the surface of the front side which has arrange | positioned the display part, or the surface of the back side of the electronic device 1. FIG. Therefore, the waterproof push button switch member 3 may also be provided on the front or back surface of the electronic device 1.

  FIG. 2 is an exploded perspective view of the waterproof pushbutton switch member shown in FIG. FIG. 3 is a perspective view of a waterproof member constituting the waterproof pushbutton switch member shown in FIG.

  The waterproof push button switch member 3 has a configuration in which the waterproof member 10, the push button 20, and the cover member 30 are stacked in this order from the inner side to the outer side in a state of being fitted in the electronic device 1. The waterproof member 10 is made of an elastic material and has three container portions 10a that open at one side and protrudes on the opposite side of the opening side, and is formed of an elastic material and radially outward from the opening portion 12 of the container portion 10a. And an elastic flange portion 10b formed so as to extend. The elastic flange portion 10b and the container portion 10a may be configured as a waterproof member 10 by bonding them separately, or the waterproof member 10 may be integrally formed. From the viewpoint of simplification of the manufacturing process and cost reduction, it is preferable to form the waterproof member 10 by integrally molding the elastic flange portion 10b and the container portion 10a as in the latter case.

  In this embodiment, the elastic flange portion 10b has a thin and elongated shape, and three container portions 10a are arranged in series in the length direction. However, the form of the elastic flange portion 10b is not limited to the above form, and may be any form such as a circle, a square, or a cross. Similarly, the arrangement, number, and size of the container portion 10a may be any arrangement, number, and size. The elastic material constituting the waterproof member 10 is preferably made of a thermoplastic elastomer, a thermosetting elastomer, natural rubber, or the like, and more preferably a silicone rubber that is a kind of thermosetting elastomer.

  The push button 20 is a member that is partially exposed from the cover member 30 and can be driven toward the container portion 10a of the waterproof member 10, and is provided with the same number as the number of the container portions 10a. The push button 20 includes a flange portion 21, a key top 22 that protrudes from one plane of the flange portion 21 and has a bottom surface that is smaller in diameter than the flange portion 21, and the other plane that is opposite to the key top 22 of the flange portion 21. And a shaft portion 23 having a bottom surface smaller than the flange portion 21. The flange portion 21, the key top 22, and the shaft portion 23 may constitute the push button 20 by bonding them separately formed, or the push button 20 may be integrally formed. From the viewpoint of simplification of the manufacturing process and cost reduction, it is preferable to form the push button 20 by integral molding as in the latter case. Note that the push button 20 is not limited to a form including one shaft portion 23 and one key top 22, but includes one or more key tops 22 on a resin sheet or elastic sheet including a plurality of shaft portions 23. Form may be sufficient. In this embodiment, the flange portion 21 has a thin disk shape. Further, the key top 22 has a trapezoidal shape in which the horizontal cross section gradually decreases from the flange portion 21, and has a form in which most of the height direction can be inserted from a through hole (described later) of the cover member 30. The shaft portion 23 has a diameter that can be inserted from the opening portion 12 of the container portion 10a of the waterproof member 10, and can contact the bottom portion of the container portion 10a to turn on the switch by pressing the push button 20. It has a length sufficient to secure the driving amount. The shaft portion 23 has a trapezoidal shape that gradually decreases the horizontal cross section from the flange portion 21 in the opposite direction. The push button 20 is disposed on the waterproof push button switch member 3 with the key top 22 penetrating from the inside to the outside of the cover member 30 and the shaft portion 23 being inserted into the container portion 10a.

  The shape of the flange portion 21 may be a shape other than a circular plate, for example, a rectangular or triangular plate. Further, the key top 22 and the shaft portion 23 may have a shape other than a trapezoid, for example, a cylindrical shape or a rectangular parallelepiped shape. The push button 20 is preferably made of a material harder than the waterproof member 10, for example, resin, metal, ceramics, graphite, or the like. Examples of the metal include stainless steel, aluminum, aluminum alloy, and iron. Examples of the resin include acrylic, polypropylene (PP), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyamide (PA), polycarbonate (PC), or a polymer alloy composed of two or more resins. Examples of ceramics include alumina, silicon nitride, and zirconia.

  As shown in FIGS. 2 and 3, the elastic flange portion 10 b protrudes from the surface facing the cover member 30 and is continuously formed along the outer periphery of each opening portion 12. Three 13 are provided. The waterproof first rib 13 forms a loop having a larger diameter than the flange portion 21 so as not to contact the flange portion 21 of the push button 20 in a state where the waterproof member 10 is laminated and attached to the cover member 30. The elastic flange portion 10b is a rib in contact with an inner casing (described later) of the electronic device 1, and protrudes from the back surface of the elastic flange portion 10b and is continuously formed along the outer periphery of each container portion 10a. Three loop-shaped second waterproof ribs 14 are provided. The waterproof second rib 14 is formed in such a size that it can come into contact with the housing in a state where the waterproof push button switch member 3 is assembled. In this embodiment, the waterproof first rib 13 and the waterproof second rib 14 are formed in an annular shape in plan view, but may be a triangular frame shape, a rectangular frame shape, or a polygonal frame shape having five or more corners. The waterproof first rib 13 and the waterproof second rib 14 are preferably made of an elastic material similar to that of the elastic flange portion 10b. The waterproof first rib 13 and the waterproof second rib 14 are configured separately from the elastic flange portion 10b, and may be fixed to the elastic flange portion 10b by bonding or welding. You may comprise the elastic flange part 10b. From the viewpoint of ensuring reliable waterproofness, simplifying the manufacturing process, and reducing costs, it is preferable to form the elastic flange portion 10b by integral molding as in the latter case.

  The cover member 30 is preferably configured from a material harder than the waterproof member 10 on the outer side of the waterproof member 10, for example, one or a combination of two or more of the constituent materials of the push button 20 illustrated above. . Moreover, the cover member 30 can also be comprised from the same material (elastic material) as the waterproof member 10. The cover member 30 has the same elongated shape as the waterproof member 10. The cover member 30 has a through hole 31 of a size that can be inserted through the key top 22 of each push button 20 but not through the flange 21 in series in the length direction of the cover member 30 at a position facing each container portion 10a. Prepare for. The cover member 30 is provided with a form that can be fitted and fixed to the waterproof member 10 preferably. However, the cover member 30 may be fixed to the waterproof member 10 by adhesion, screwing, or the like. Furthermore, the cover member 30 can be fixed to the inner housing of the electronic apparatus 1 and may simply sandwich the waterproof member 10.

  FIG. 4 shows a main cross-sectional view of the waterproof pushbutton switch member according to the first embodiment set in an electronic device and an enlarged view of a part X thereof.

  The waterproof member 10 is inserted into the insertion port 41 formed in the housing 40 inside the electronic device 1 and the elastic flange portion 10b is placed on the outer surface of the housing 40 while the waterproof member 10 is on the housing 40. Placed in. The container part 10a is arrange | positioned in the state which inserted the reinforcement member 50 inside. The reinforcing member 50 has a cup shape including a side wall extending on the side surface of the container portion 10a. The reinforcing member 50 is disposed in a state where the opening is directed to the opening 12 of the container 10a. The push button 20 is disposed by inserting the shaft portion 23 into the container portion 10a and contacting the bottom portion thereof. The cover member 30 is inserted into the key top 22 of the push button 20 through the through hole 31, and the waterproof member 10 is in a state where the flange portion 21 of the push button 20 is in contact with the back surface of the flange 32 formed around the through hole 31. It is fixed to the cover housing 40 from the outside. As shown in the enlarged view of part X, in the state where the waterproof pushbutton switch member 3 is set in the electronic device 1, the waterproof first rib 13 and the waterproof second rib 14 formed on the elastic flange portion 10b are: The cover member 30 and the housing 40 are sandwiched with a predetermined pressure. As a result, even if water enters from the gap between the push button 20 and the cover member 30, it is possible to effectively prevent water from entering through the insertion port 41 of the housing 40. Since the waterproof first rib 13 and the waterproof second rib 14 are formed opposite to each other in the thickness direction of the elastic flange portion 10b, the clamping force between the cover member 30 and the housing 40 is the waterproof first. This is used to reliably deform both the one rib 13 and the waterproof second rib 14. Therefore, higher waterproofness can be exhibited.

  The reinforcing member 50 keeps the shape of the container part 10a and facilitates insertion into the insertion port 41 of the housing 40, and prevents the shaft part 23 from breaking the bottom of the container part 10a by pressing the push button 20. It has both functions. Further, as will be described later, since the shaft portion 23 pushes the reinforcing member 50 and pushes the switch disposed below the container portion 10a, the reinforcing member 50 also has a function of giving a good pressing feeling to the user. . The reinforcing member 50 for exhibiting such a function is preferably composed of a material harder than the waterproof member 10, for example, resin, metal, ceramics, graphite or the like. Examples of the metal include stainless steel, aluminum, aluminum alloy, and iron. Examples of the resin include acrylic, polypropylene (PP), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyamide (PA), polycarbonate (PC), or a polymer alloy composed of two or more resins. Examples of ceramics include alumina, silicon nitride, and zirconia. When lightening, thinning and shortening, the reinforcing member 50 is preferably made of a highly rigid metal member. When the key top 22 is illuminated from the inside, the reinforcing member is made of a highly permeable resin. 50 is preferred.

  A circuit board 60 is disposed inside the housing 40. The circuit board 60 includes a switch board 61 on the front side surface. The switch board 61 includes a dome switch 62 as an example of a switch at a position below the insertion port 41 of the housing 40. The dome switch 62 is made of a material having excellent conductivity, for example, stainless steel. The annular lower end of the dome switch 62 is electrically connected to an electrode 63 formed on the switch substrate 61. In addition, an electrode 64 that is not in electrical contact with the electrode 63 is disposed on the switch substrate 61 and immediately below the convex portion of the dome switch 62. Since the dome switch 62 is fixed to the switch board 61, the switch board 61 and the area excluding the area in contact with the container portion 10a above the cover board 61 are covered with the sheet 65. The sheet 65 is covered except for the region in contact with the container portion 10a because the member sandwiched between the shaft portion 23 and the dome switch 62 does not intervene with a soft material as much as possible to provide a good pressing feeling. This is to give to the user.

  When the inside of the electronic device 1 and the waterproof pushbutton switch member 3 have the above-described configuration, when the key top 22 is pushed inward of the electronic device 1, the shaft portion 23 passes through the reinforcing member 50 and the container portion 10 a Push the bottom inward. Then, the connection area | region of the elastic flange part 10b of the waterproof member 10 and the container part 10a is extended, the container part 10a moves to the inner side of the electronic device 1, and the dome switch 62 is dented. As a result, the electrode 63 and the electrode 64 are electrically connected via the dome switch 62, and the switch is turned on. The distance from the flange 32 of the cover member 30 to the elastic flange portion 10b is such that the flange portion 21 does not come into contact with the elastic flange portion 10b until the shaft portion 23 has depressed the dome switch 62 and turned on. , Longer than the movable distance of the shaft portion 23. When the container portion 10a moves inward, the waterproof first rib 13 and the waterproof second rib 14 formed on the elastic flange portion 10b are not moved in the horizontal direction in FIG. The state sandwiched between the housing 40 is maintained. For this reason, high waterproofness can be exhibited even when the push button 20 is pressed.

  When the key top 22 is pushed inward toward the inner side of the electronic device 1 and then the pressure is released, the dome switch 62 tries to return to its original state due to its elasticity. At the same time, the elastic flange portion 10b around the opening 12 of the container portion 10a also tries to return to its original state from the extended state. As a result, the push button 20 and the container part 10a move to the outer side of the electronic device 1. The electrodes 63 and 64 return to the non-contact state electrically when the dome switch 62 returns to its original shape, and the switches are turned off. Note that turning on or off of the above-described switch may be the reverse of the above.

2. Second Embodiment Next, a waterproof pushbutton switch member and an electronic apparatus including the same according to a second embodiment of the present invention will be described. In the second embodiment, parts that are the same as those in the above embodiment are given the same reference numerals, and redundant descriptions are omitted. The waterproof pushbutton switch member according to the second embodiment is different from that according to the first embodiment in the shape of the reinforcing member, and the rest is the same as in the first embodiment.

  FIG. 5 shows a main cross-sectional view of the waterproof member constituting the waterproof push button switch member according to the second embodiment. FIG. 6 shows a main cross-sectional view of a modification of the waterproof member shown in FIG.

  The reinforcing member 51 and the reinforcing member 52 shown in FIGS. 5 and 6 are made of the same material as the reinforcing member 50 described in the first embodiment. The reinforcing member 51 shown in FIG. 5 has a plate shape without a side wall, and is fixed to the inner bottom surface of the container portion 10a. The shaft portion 23 of the push button 20 pushes the bottom portion of the container portion 10a inward through the reinforcing member 51, so that the bottom portion of the container portion 10a can be prevented from being damaged and a good pressing feeling can be exhibited. Further, as shown in FIG. 6, the reinforcing member 52 is a plate-like member similar to the reinforcing member 51, and may be fixed to the outer bottom portion of the container portion 10a. While preventing the damage of the bottom part of 10a, a favorable press feeling can be exhibited. Since the outer periphery of the container portion 10a is not provided with a rib for waterproofing with the insertion port 41 of the housing 40, it is necessary to keep the distance between the side wall of the container portion 10a and the inner wall of the insertion port 41 constant. There is no. For this reason, even if it uses a plate-shaped member like the reinforcing members 51 and 52, there is no influence on waterproofing.

3. Third Embodiment Next, a waterproof pushbutton switch member and an electronic apparatus including the same according to a third embodiment of the present invention will be described. In the third embodiment, parts that are the same as those in the above-described embodiment are given the same reference numerals, and redundant descriptions are omitted. The waterproof push button switch member according to the third embodiment is different from that according to the first embodiment in the fixing position of the reinforcing member, and the rest is common to the first embodiment.

  FIG. 7 shows a main cross-sectional view of the waterproof member constituting the waterproof push button switch member according to the third embodiment.

  The reinforcing member 53 shown in FIG. 7 is a cup-shaped member made of the same material as that of the reinforcing member 50 described in the first embodiment. The reinforcing member 53 is fixed to the outside of the container portion 10a. Even with such a configuration, it is possible to prevent the bottom portion of the container portion 10a from being damaged and to exert a good pressing feeling.

4). Fourth Embodiment Next, a waterproof pushbutton switch member and an electronic apparatus including the same according to a fourth embodiment of the present invention will be described. In the fourth embodiment, parts that are the same as in the above-described embodiment are given the same reference numerals, and redundant descriptions are omitted. The waterproof pushbutton switch member according to the fourth embodiment is different from that according to the first embodiment in the form of the reinforcing member and the fixing position, and the other points are the same as in the first embodiment. .

  FIG. 8 is a main cross-sectional view of the waterproof member constituting the waterproof pushbutton switch member according to the fourth embodiment.

  The container part 10a fixes the laminated body 56 which laminated | stacked the plate-shaped reinforcement member 55 and the plate-shaped elastic member 54 on the outer bottom part. The reinforcing member 55 is preferably configured from the same material as the reinforcing member 50 described in the first embodiment, and the elastic member 54 is preferably configured from the same material as that of the container portion 10a. In FIG. 8, the laminated body 56 is fixed to the outer bottom portion of the container portion 10a with the reinforcing member 55 side facing outward and the elastic member 54 side facing the container portion 10a. This is because, with this configuration, the reinforcing member 55 directly contacts the dome switch 62, so that a good pressing feeling can be easily obtained. However, if priority is given to preventing damage to the bottom of the container part 10a by the shaft part 23, the laminate 56 may be fixed to the container part 10a with the reinforcing member 55 on the container part 10a side.

  FIG. 9 is a view for explaining an example of a suitable manufacturing process for fixing the reinforcing member shown in FIG. 8 to the container portion.

  Like the waterproof member 10 described in the second embodiment, when the reinforcing member 52 is fixed to the outer bottom portion of the container portion 10a, the adhesion reliability between the reinforcing member 52 and the container portion 10a is low. It becomes a problem. This is due to the difference in the constituent materials of the reinforcing member 52 and the container portion 10a. This is because, when two different materials are bonded together, there is a high risk that both of them are peeled off as compared to bonding materials composed of the same material. In addition, when the reinforcing member 52 is used as a component part of the switch member in the mobile communication terminal which is an example of the electronic device 1, the diameter of the reinforcing member 52 is about 2 mm, which is very small. This makes it more difficult to firmly fix the reinforcing member 52 at the correct position on the outer bottom of the container portion 10a.

  In order to solve such a problem, by using the laminate 56 of the reinforcing member 55 and the elastic member 54 shown in FIG. 8, the elastic member 54, which is the same or similar material to the container portion 10a, is adhered to the container portion 10a. Further, peeling due to insufficient adhesion between the reinforcing member 55 and the container portion 10a can be prevented. The adhesion between the reinforcing member 55 and the elastic member 54 in the laminated body 56 can be reinforced by the following method. As shown in FIG. 9, a large-sized elastic member sheet 70 and a large-sized reinforcing member sheet 71 are firmly fixed using an adhesive or the like to manufacture a laminated sheet 72. Since the elastic member sheet 70 and the reinforcing member sheet 71 are very large compared to the respective sizes of the elastic member 54 and the reinforcing member 55, there is no problem such as an adhesion position or insufficient application of the adhesive, and the both are made strong. Can be fixed to. Next, the laminated sheet 72 is punched out using a punch or the like to manufacture a small laminated body 56. Next, the laminate 56 is set in a molding die, and an elastomer material is supplied to the elastic member 54 side of the laminate 56 to be cured. Thereafter, the mold is separated, and the laminated body-integrated waterproof member 10 in which the outer bottom portion of the container portion 10a and the elastic member 54 side are fixed to each other can be obtained. By simply setting the laminate 56 in the mold, the waterproof member 10 having the laminate 56 secured to the outer bottom of the container portion 10a can be obtained. Therefore, the laminate 56 is placed in the container portion 10a of the waterproof member 10 after molding. There is no need to bond one by one. It should be noted that any surface modification other than primer application or primer application for reinforcing adhesion to the container portion 10a may be performed on the elastic member 54 side of the laminate 56. As an example of such a surface modification method, for example, blast treatment, plasma treatment, UV treatment, so-called itro treatment for forming a silicon oxide film by attaching silicon oxide obtained by oxidizing a silicon tetrachloride gas with an oxidation flame, etc. Etc.

5. Other Embodiments As described above, each embodiment of the waterproof pushbutton switch member and the electronic device using the same has been described, but the present invention is not limited to each of the above embodiments. Various modifications can be made.

  FIG. 10 is a perspective view showing a modified example of the waterproof member shown in FIGS. 2 and 3, and shows a perspective view (A) seen from the front side and a perspective view (B) seen from the back side.

  As shown in FIGS. 2 and 3, the waterproof first rib 13 is continuously formed along the outer periphery of the opening 12 of one container portion 10a, and the waterproof second rib 14 is provided with a waterproof first rib 13. It is the other side of one rib 13 and is continuously formed along the outer periphery of one container part 10a. However, as shown in FIG. 10, it is a rib that protrudes from the surface on the front side of the elastic flange portion 10 b and is in contact with one loop-shaped waterproof first rib 13 a that surrounds the plurality of openings 12 and the housing 40. One loop-shaped waterproof second rib 14a that protrudes from the back surface of the flange portion 10b and surrounds the plurality of container portions 10a may be formed on the elastic flange portion 10b.

  The waterproof first rib 13 and the waterproof second rib 14 do not have to be formed opposite to each other in the thickness direction of the elastic flange portion 10b. For example, the waterproof first rib 13 and the waterproof second rib 14 can be formed to be shifted from each other in the thickness direction. The reinforcing member 50 is fixed to the inside of the container portion 10a, but may be embedded in the container portion 10a. Further, when the reinforcing member 50 is cup-shaped, the reinforcing member 50 may be simply arranged without being fixed inside the container portion 10a. In addition, a switch other than the dome switch 62, for example, a tact switch or the like may be disposed inside the electronic device 1 from the housing 40. In that case, the push button 20 returns to the original position exclusively by the elastic deformation of the waterproofing member 10 when the pressing is released after the pressing. At least one waterproof rib of the waterproof first rib 13 and the waterproof second rib 14 is formed along the outer periphery of each container portion 10a, and at least the waterproof first rib 13a and the waterproof second rib 14a are formed. One waterproof rib may also be formed on the outer periphery common to the plurality of container parts 10a to construct a double waterproof wall.

  The present invention can be used as a push button switch member incorporated in a waterproof device.

DESCRIPTION OF SYMBOLS 1 Electronic device 3 Waterproof pushbutton switch member 10 Waterproof member 10a Container part 10b Elastic flange part 12 Opening part 13 and 13a Waterproof first rib 14 and 14a Waterproof second rib 20 Pushbutton 22 Keytop 23 Shaft part 30 Cover member 31 Through hole 40 Housing 41 Insertion port 50, 51, 52, 53, 55 Reinforcement member 54 Elastic member 56 Laminate body 62 Dome switch (an example of switch)

Claims (5)

One or two or more container parts that are made of an elastic material and open at one side and project to the opposite side of the opening side, and are made of an elastic material and extend radially outward from the opening part of the container part. A waterproof member having a reinforcing member shaped to cover at least the bottom of the container part on the inside, outside or inside of the container part;
A cover member that is on the outer side of the waterproof member and includes a through hole at a position facing the container portion;
A pushbutton that has a key top that protrudes outward from the through hole and a shaft portion that is inserted into the container portion, and can be driven toward the container portion;
With
A waterproof pushbutton switch member that turns on a switch disposed below the container portion by the bottom of the container portion that has received pressure from the shaft portion,
In the elastic flange part,
A rib in contact with the cover member, which protrudes from the surface on the front side of the elastic flange portion, and is formed in a loop-shaped first rib for waterproofing continuously formed on the outer periphery of the opening;
A rib that is inward of the waterproof member and is in contact with a housing having an insertion port for inserting the container part, and is a loop that protrudes from the back surface of the elastic flange part and is continuously formed on the outer periphery of the container part A second rib for waterproofing,
A waterproof push button switch member comprising:   2. The waterproof pushbutton switch member according to claim 1, wherein the waterproof first rib and the waterproof second rib are formed opposite to each other in the thickness direction of the elastic flange portion.   The waterproof pushbutton switch member according to claim 1 or 2, wherein the reinforcing member has a cup shape including a side wall extending to a side surface of the container portion. The reinforcing member is a plate-shaped member fixed to the outside of the bottom portion of the container portion,
The waterproof pushbutton switch member according to claim 1 or 2, wherein a laminated body in which the reinforcing member and the elastic member are laminated is fixed to a bottom portion of the container portion.   An electronic apparatus comprising the waterproof pushbutton switch member according to any one of claims 1 to 4.

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