JP2008091059A - Structure of push-button switch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent malfunction of a contact part installed on a printed circuit board and improve a feeling of operation by imparting a feeling of a click when pushing down a push-button in a structure of the push-button switch. <P>SOLUTION: On an operation surface 9 of a function button 8 facing an operation window 5 installed at the upper case 3, four pressing operation parts 9a to 9d are installed with an equal spacing in the circumferential direction. In a rubber sheet 12, click forming materials 13a to 13d positioned directly under the pressing operation parts 9a to 9d and pressing materials 15a to 15d positioned between these are erected and installed. On the printed circuit board 19, contact parts 20a to 20d to be closed and formed by a conductive part installed at the bottom part of the pressing materials 15a to 15d are installed. Rigidity of the click forming materials 13a to 13d is formed to be larger than that of the pressing materials 15a to 15d. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a structure of a push button switch having an operation surface provided with at least three pressing operation portions at equal intervals in the circumferential direction.

As a conventional push button switch structure, there are a push button having an operation surface provided with four pressing operation parts at equal intervals in the circumferential direction, and a push button corresponding to the pressing operation part of the push button is pushed up by a resilient force 4 Each of the four contact portions provided on the printed circuit board through the conductive portion provided on each pressing body by pressing down the pressing operation portion of the push button. (For example, refer to Patent Document 1).
JP 2001-250455 A (paragraphs [0015] to [0019], FIGS. 1 to 3)

  In the structure of the conventional pushbutton switch described above, since the conductive portion is provided in the pressing body that is pushed down by each pressing operation portion of the pushbutton, the rigidity of the pressing body is tried to give a click feeling to the finger that operates the pushbutton. If the value is increased, the pressing body may not be sufficiently depressed, and there is a problem that the contact portion provided on the printed board cannot be operated.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to prevent malfunction of a contact portion provided on a printed circuit board, and to provide a feeling of operation when a push button is pressed down to provide an operational feeling. An object of the present invention is to provide an improved push button switch structure.

  In order to achieve this object, the invention according to claim 1 is directed to a printed circuit board provided with at least three contact portions, and a press formed on the printed circuit board and formed with a conductive portion that closes the contact portions. A push button comprising a rubber sheet having a body and a push button provided on the rubber sheet and pushed up by the elastic force of the push body, wherein the push button is provided with at least three push operation portions at equal intervals in the circumferential direction. In the switch structure, each pressing operation portion of the push button is positioned between the pressing bodies in the circumferential direction of the push button, and the rubber sheet is positioned between the pressing bodies in the circumferential direction of the push button so that the push button has a resilient force. The click forming body to be pushed up is provided, and the rigidity of the click forming body is made larger than the rigidity of the pressing body.

  The invention according to claim 2 is the invention according to claim 1, wherein the pressing body is provided with a recess, and the push button is provided with a protrusion that fits into the recess.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the click forming body is positioned directly below each pressing operation portion of the push button.

  According to the present invention, the rubber sheet is provided with a click forming body that gives a click feeling to a finger that presses the push button and a pressing body that operates a contact portion provided on the printed circuit board, thereby increasing the rigidity of the click forming body. As a result, when the push button is pushed down by the elastic force of the click forming body, a feeling of clicking is obtained, thereby improving the operational feeling. Further, since the rigidity of the pressing body is reduced, the pressing body is easily elastically deformed when the push button is pressed down, so that it is possible to prevent malfunction of the contact portion provided on the printed circuit board.

  According to the invention of claim 2, since the push button and the pressing body are integrated through the protrusion, the followability of the pressing body with respect to the push-down operation of the push button is improved, so that the pressing body is reliably elastically deformed. Therefore, it is possible to further prevent malfunction of the contact portion provided on the printed board.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of a telephone to which the structure of a pushbutton switch according to the present invention is applied, FIG. 2 is a perspective view showing an exploded main part, FIG. 3A is a plan view of the pushbutton switch according to the present invention, and FIG. 4B is a bottom view, FIG. 4 is a sectional view taken along line IV-IV in FIG. 3A, FIG. 5 is a sectional view taken along line VV in FIG. 3A, and FIG. FIG. 7 is a cross-sectional view taken along the line VI, and FIG. 7 is a cross-sectional view taken along the line VV in FIG.

  1 is configured by a lower case (not shown) and an upper case 2 which are both formed in a shallow bottom shape, and a plurality of upper cases 2 are provided as shown in FIG. Dial button hole 3 and function button hole 4 and one operation window 5 are provided. The dial button 6 faces the dial button hole 3, the function button 7 faces the function button hole 4, and the function button 8 faces the operation window 5.

  2 and 3, the function button 8 has a cup shape with a top portion 9 forming an operation surface and a body portion 10 formed in a ring shape. Four pressing operation portions 9a to 9d are provided at equal intervals (90 °) in the circumferential direction. As shown in FIG. 5, a collar 10a that engages with the lower edge of the operation window 5 of the upper case 2 is provided at the lower end of the body 10, and a function button 8 is provided on a part of the collar 10a. A projecting piece 10b for positioning the function button 8 in the circumferential direction when facing the operation window 5 is provided (see FIG. 3).

  The lower end surface 11 of the trunk | drum 10 forms the press surface which presses the click formation bodies 13a thru | or 13d and the press bodies 15a thru | or 15d of the rubber sheet 12 mentioned later. On the pressing surface 11, four protrusions 11a to 11d are equidistantly spaced (90 °) in the circumferential direction so as to be positioned between the pressing operation portions adjacent to each other among the four pressing operation portions 9a to 9d. Is protruding.

  In FIG. 2, reference numeral 12 denotes a rubber sheet formed in a rectangular shape in plan view by a rubber-like member that can be elastically deformed, and click forming bodies 13 a to 13 a that are pressed by the four pressing operation portions 9 a to 9 d of the function button 8. 13d and four pressing bodies 15a to 15d located in the middle of the click forming bodies adjacent to each other of these click forming bodies 13a to 13d are erected integrally.

  The click forming bodies 13a to 13d are formed in a cylindrical shape, and are erected integrally with the rubber sheet 12 via an elastic support portion 14 having flexibility and a skirt shape as shown in FIG. Yes. The pressing bodies 15a to 15d are formed in a columnar shape, and are erected integrally with the rubber sheet 12 via an elastic support portion 16 having flexibility and a skirt shape as shown in FIG. . Further, as shown in FIG. 2, concave portions 17a to 17d into which the projections 11a to 11d of the function button 8 are fitted are formed on the upper surfaces of the pressing bodies 15a to 15d, and a conductive portion 18a is formed on the bottom. Thru 18d are provided.

  By making the thickness of the elastic support portion 14 of the click forming bodies 13a to 13d larger than the thickness of the elastic support portion 16 of the pressing bodies 15a to 15d, the rigidity of the elastic support portion 14 is larger than the rigidity of the elastic support portion 16. It is formed to become.

  In FIG. 2, 19 is a printed circuit board formed in a rectangular shape in plan view, and is provided with four contact portions 20a to 20d that are closed by contacting the conductive portions 18a to 18d of the pressing bodies 15a to 15d. Yes.

  In such a configuration, when the protrusions 11a to 11d of the function button 8 are fitted into the recesses 17a to 17d of the pressing bodies 15a to 15d of the rubber sheet 12, the pressing surface 11 of the function button 8 is clicked bodies 13a to 13d. The pressing members 15a to 15d are in contact with the upper surfaces of the pressing members 15a to 15d. In this state, the function button 8 is made to face the operation window 5 from below the upper case 3 as shown in FIG. The printed circuit board 19 is overlapped with the rubber sheet 12 and positioned on the upper case 2 and attached to the back side of the upper case 2 so that the contact portions 20a to 20d of the printed circuit board 19 are connected to the pressing bodies 15a to 20a of the rubber sheet 12. It faces the conductive portions 18a to 18d of 15d.

  In this state, when the pressing operation portion 9a is pushed down among the four pressing operation portions 9a to 9d of the function button 8, the pressing surface 11 of the function button 8 is positioned directly below the pressing operation portion 9a as shown in FIG. Since the elastic support portion 14 of the click forming body 13a to be elastically deformed, the click forming body 13a is pushed down. When the click forming body 13a is pushed down, the elastic support portions 16 of the two adjacent pressing bodies 15a and 15b are also elastically deformed by the inclined pressing surface 11 of the function button 8, and the pressing bodies 15a and 15b are pushed down. The contact portions 20a and 20b of the printed circuit board 19 are closed by the conductive portions 18a and 18b of 15a and 15b.

  Similarly, when the pressing operation portion 9b is pushed down, the click forming body 13b is pushed down, and the adjacent pressing bodies 15b and 15c are pushed down. , 20c are closed.

  Further, when the pressing operation portion 9c is pushed down, the click forming body 13c is pushed down, and the adjacent pressing bodies 15c and 15d are pushed down. 20d closes. Further, when the pressing operation portion 9d is pushed down, the click forming body 13d is pushed down, and the adjacent pressing bodies 15d and 15a are pushed down. Therefore, the conductive portions 18d and 18a of the pressing bodies 15d and 15a are contact portions 20d and 20a closes.

  Here, the rigidity of the elastic support portions 14 of the click forming bodies 13a to 13d that are located immediately below the respective pressing operation portions 9a to 9d of the function button 8 and are directly pushed down by the respective pressing operation portions 9a to 9d is determined by the pressing body 15a. In other words, the elastic support portion 16 is formed to be larger than the rigidity of the elastic support portion 16 of 15d. For this reason, when the function button 8 is pressed down, the click feeling is obtained by the resilient force of the click forming bodies 13a to 13d, so that the operation feeling is improved. Further, since the rigidity of the pressing bodies 15a to 15d provided with the conductive portions 18a to 18d is reduced, the pressing bodies 15a to 15d are easily elastically deformed when the function button 8 is pressed down. It is possible to prevent malfunction of the contact portions 20a to 20d.

  Further, since the protrusions 11a to 11d of the function button 8 are fitted in the recesses 17a to 17d of the pressing bodies 15a to 15d, the function button 8 and the pressing bodies 15a to 15d are integrated with each other through the protrusions 11a to 11d. Therefore, since the followers of the pressing bodies 15a to 15d with respect to the pressing operation of the function button 8 are improved, the pressing bodies 15a to 15d are surely elastically deformed, so that the contact portions 20a to 20d provided on the printed circuit board 19 are provided. This malfunction can be further prevented.

  In the present embodiment, the example in which the four pressing operation portions 9a to 9d of the function button 8 are provided has been described. However, the number may be three or more, and in that case, the contact portions 20a to 20d of the printed circuit board 19 may be used. Etc. may be provided in accordance with the number of pressing operation portions.

It is a top view of the telephone to which the structure of the pushbutton switch which concerns on this invention is applied. It is a perspective view which decomposes | disassembles and shows the principal part of the telephone to which the structure of the pushbutton switch which concerns on this invention is applied. It is a top view which shows the structure of the pushbutton switch which concerns on this invention. It is the IV-IV sectional view taken on the line in FIG. It is the VV sectional view taken on the line in FIG. It is the VI-VI sectional view taken on the line in FIG. FIG. 5 is a cross-sectional view taken along line VV in FIG. 3A showing a state where the push button is pressed down in the structure of the push button switch according to the present invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Telephone, 2 ... Upper case, 5 ... Operation window, 8 ... Function button, 9 ... Operation surface, 9a thru | or 9d ... Press operation part, 11a thru | or 11d ... Protrusion, 12 ... Rubber sheet, 13a thru | or 13d ... Click formation , 14, 16 ... elastic support parts, 15a to 15d ... pressing bodies, 17a to 17d ... concave parts, 18a to 18d ... conductive parts, 19 ... printed circuit boards, 20a to 20d ... contact parts.

Claims (3)

  A printed circuit board provided with at least three contact parts, a rubber sheet having a pressing body provided on the printed circuit board and formed with a conductive part that closes the contact parts, and the pressure sheet provided on the rubber sheet A push button that is pushed up by the elastic force of the body, and in which the push button is provided with at least three push operation portions at equal intervals in the circumferential direction, each push operation portion of the push button is connected to a circle of the push button. Positioned between the pressing bodies in the circumferential direction, the rubber sheet is provided with a click forming body that is positioned between the pressing bodies in the circumferential direction of the push button and pushes up the push button by a resilient force, and the rigidity of the click forming body is A pushbutton switch structure characterized by being larger than the rigidity of the pressing body.   2. The push button switch structure according to claim 1, wherein the pressing body is provided with a recess, and the push button is provided with a protrusion that fits into the recess.   The structure of the push button switch according to claim 1 or 2, wherein the click forming body is positioned immediately below each pressing operation portion of the push button.

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