JP4925556B2 - Deformation prevention mechanism for rotary operation shaft for portable wireless devices. - Google Patents

Deformation prevention mechanism for rotary operation shaft for portable wireless devices. Download PDF

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Publication number
JP4925556B2
JP4925556B2 JP2003207231A JP2003207231A JP4925556B2 JP 4925556 B2 JP4925556 B2 JP 4925556B2 JP 2003207231 A JP2003207231 A JP 2003207231A JP 2003207231 A JP2003207231 A JP 2003207231A JP 4925556 B2 JP4925556 B2 JP 4925556B2
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Prior art keywords
operation shaft
chassis
rotation operation
flange
rotation
Prior art date
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JP2005064019A (en
Inventor
佳明 鈴木
博之 郡司
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JVCKenwood Corp
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JVCKenwood Corp
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【０００１】
【発明の属する技術分野】
この発明はボリューム、エンコーダ等の回転操作部品に係わり、特に、その回転操作軸の変形防止機構に関する。
【０００２】
【従来の技術】
従来の無線機等の回転操作部品の取付構造の例を図５に示す。図５に示すボリューム２の回転操作軸２ａを回動自在に支持する軸受け２ｂがシャーシ１の穴に挿通され、軸受け２ｂの外周面に設けられたおねじにナット３が螺合される。ナット３を締め付けることによりボリューム２がシャーシ１に固定される。
【０００３】
このようにシャーシ１に固定されたボリューム２の回転操作軸２ａはケース５の穴から外部に突出し、この回転操作軸２ａに回転操作つまみ７をつまみスプリング８を介して嵌着し、回転操作つまみ７がつまみスプリング８の弾力による摩擦により回転操作軸２ａに固定される。そして、回転装置つまみ７により回転操作軸２ａが回動操作される。
【０００４】
図６に示す無線機１０には図５に示す取付構造によりボリュームが取り付けられており、ボリュームの回転操作軸に嵌着された回転操作つまみ７とアンテナ９が無線機１０のケース５の外部に突出している。この無線機１０を傾斜させた状態で矢印に示す方向に落下させると、無線機１０が床と衝突したときに回転操作つまみ７に軸方向に対して斜め方向の撃力を受ける。
【０００５】
この撃力は回転操作軸２ａに曲げモーメントとして作用し、回転操作軸２ａが細いと、図７の矢印方向に回転操作軸２ａが曲げられる。このように回転操作軸２ａが曲がると、回転操作つまみ７により回転操作軸２ａを回転させることができず、スイッチのオンオフ、チャンネルの変更または音量の調整等ができなくなるという恐れがあった。そのため、回転操作軸２ａの径を大きくしなければならず、無線機を小型化するための障害となっていた。
【０００６】
特開平１１−１８９０７２号公報に提案された操作装置では、回転操作軸と嵌合する操作つまみの嵌合孔の奥に回転操作軸と当接するリブを設け、操作つまみに回転操作軸方向の押圧力が加わったときに操作つまみのリブが変形して回転操作軸の変形を防止する構成となっている。また、操作つまみを復元性のある素材で形成することも提案されている。
【０００７】
しかしながら、上記構成では、操作つまみが復元性のない素材で作られている場合は、操作つまみに衝撃力が加わった場合に操作つまみが破損して取り替えなければならない。操作つまみを復元性のある素材で形成する場合は操作つまみが柔らかいため、装置の品位が損なわれる。さらに、操作つまみに回転操作軸に対して直角方向の力が加わった場合に回転操作軸の曲りを防止することができないという問題があった。
【０００８】
【特許文献１】
特開平１１−１８９０７２号公報（第３頁、図１、図２）
【０００９】
【発明が解決しようとする課題】
この発明は上記した点に鑑みてなされたものであって、その目的とするところは、回転操作部品の回転操作軸の径を小さくし、硬質の操作つまみを嵌合させた場合にも操作つまみに衝撃力が加わったときに回転操作軸の変形が防止される回転操作軸の変形防止機構を提供することにある。
【００１０】
この発明の回転操作軸の変形防止機構は、
第１の穴が形成されているシャーシと、
第２の穴が形成され、前記シャーシを覆うケースと、
回転操作軸を有する回転操作部品であり、前記回転操作軸が前記第１の穴に挿入され、かつ、前記第２の穴と対応する位置に配置され、前記回転操作軸が回動自在の状態で前記シャーシに固定された回転操作部品と、
前記回転操作軸を挿入する凹部を有し、前記凹部に前記回転操作軸の前記シャーシに固定された部分よりも先端側の部分が挿入されることによって前記回転操作軸に嵌着され、上部が前記第２の穴から突出し、前記シャーシと前記ケースとに近接状態で挟まれるように配置された円板形状のフランジが下部に一体形成され、前記凹部側の端部から前記フランジの外周端部まで続く下端面が前記シャーシの上面よりも上側に位置する回転操作つまみと、
を備え、
前記回転操作つまみの前記下端面は前記凹部側の端部と前記フランジの外周端部との中間に位置する中間部を含めて前記シャーシと近接状態となっており、
前記回転操作つまみに前記回転操作軸方向に対して斜め方向の外力が加わった場合には、前記下端面と前記シャーシ上面との抗力、及び、前記フランジ上面と前記ケース下面との抗力により前記回転操作つまみの変位が規制されることで、前記外力により前記回転操作軸が受ける曲げモーメントによる前記回転操作軸の変形を防止することを特徴としている。
また、この発明の回転操作軸の変形防止機構は、さらに
前記ケースの前記第２の穴側の端部は前記フランジの外周端部よりも内周側に位置しており、
前記フランジは、前記フランジの上面が、前記ケースの前記第２の穴側の端部と前記フランジの外周端部と間で、前記ケースの下面と近接し、かつ、前記下端面と前記シャーシとが、前記中間部を含めて前記近接状態で配置されることにより、前記シャーシと前記ケースとに近接状態で挟まれていてもよい。
また、この発明の回転操作軸の変形防止機構は、さらに
前記回転操作つまみの外周は、前記フランジの上面と前記上部との間の径が前記前記上部の径より小さくなっていてもよい。
また、この発明の携帯無線機は上記した回転操作軸の変形防止機構を備えている。
【００１１】
【発明の実施の形態】
この発明の実施例である回転操作軸の変形防止機構を図面に基づいて説明する。図１はこの発明の実施例である回転操作軸の変形防止機構を示す断面図である。
【００１２】
図１に示すボリューム２の回転操作軸２ａを回動自在に支持する軸受け２ｂがシャーシ１の穴に挿通され、軸受け２ｂの外周面に設けられたおねじにナット３が螺合される。ナット３を締め付けることによりボリューム２がシャーシ１に固定される。このようにシャーシ１に固定されたボリューム２の回転操作軸２ａに回転操作つまみ４が嵌着され、回転操作つまみ４により回転操作軸２ａが回動操作される。
【００１３】
回転操作つまみ４の下部にフランジ４ａが円板状に一体に形成されている。フランジ４ａの下面はシャーシ１の上面に近接している。シャーシ１はケース５に覆われるが、フランジ４ａの上面はケース５の下面に近接する。このように回転操作つまみ４のフランジ４ａはシャーシ１とケース５との間に近接状態で介在する。回転操作つまみ４のフランジ４ａの上にケース５が被せられているので、回転操作つまみ４と回転操作軸２ａの間につまみスプリングを介在させなくても回転操作つまみ４が回転操作軸２ａから抜けることはない。
【００１４】
図２にシャーシ１に取付けられたボリュームに回転操作つまみ４が嵌着された状態でケース５が取付けられる状態を示している。また、図３に示す変形例ではケース６にボリュームおよび回転操作つまみ４が取付けられたシャーシ１が装着される状態を示している。この場合、ケース６の内面に突出形成されたフランジ近接面６ａが装着されたシャーシに取付けられた回転操作つまみ４のフランジ４ａと近接する。
【００１５】
図４は実施例の回転操作つまみ４に矢印方向の外力が加えられる状態を示している。この外力により回転操作つまみ４が嵌着された回転操作軸は曲げモーメントを受けるが、回転操作つまみ４のフランジ４ａがケース５とシャーシ１により変位が規制されるため回転操作軸は変形しない。
【００１６】
実施例は以上のように構成されているが発明はこれに限られず、例えば、回転操作部品としてボリュームの他にエンコーダや回転スイッチ等にこの発明を適用することも可能である。
【００１７】
【発明の効果】
この発明の回転操作軸の変形防止機構によれば、回転操作軸の径を小さくして無線機等を小型に形成できる。しかも、回転操作軸を操作するつまみに衝突等により衝撃力が加わっても回転操作軸が変形して機能が損なわれることが防止でき、部品交換の必要がない。
【００１８】
この発明を適用する場合に、従来の回転操作部品の取付構造に比べ回転操作つまみの形状を変えるだけでよく部品点数や組立て工数が増加することがない。
【００１９】
また、回転操作つまみのフランジの上にケースが被せられているので、回転操作つまみと回転操作軸の間につまみスプリングを介在させなくても回転操作つまみが回転操作軸から抜けることはない。
【００２０】
さらに、回転操作つまみを硬質の材料で作ることができ、製品の品位が落ちることがない。
【図面の簡単な説明】
【図１】この発明の実施例である回転操作軸の変形防止機構を示す断面図である。
【図２】同変形防止機構の組立て状態を示す分解斜視図である。
【図３】同変形防止機構の他の組立て状態を示す分解斜視図である。
【図４】同変形防止機構の作用を示す斜視図である。
【図５】従来の回転操作部品の取付構造の例を示す断面図である。
【図６】同回転操作部品の取付構造が用いられた無線機の落下状態を示す斜視図である。
【図７】同同回転操作部品の回転操作軸の変形状態を示す斜視図である。
【符号の説明】
１ シャーシ
２ ボリューム、２ａ 回転操作軸、２ｂ 軸受け
３ ナット
４ 回転操作つまみ、４ａ フランジ
５ ケース
６ ケース、６ａ フランジ近接面
７ 回転操作つまみ
８ つまみスプリング
９ アンテナ
１０ 無線機[0001]
BACKGROUND OF THE INVENTION
The present invention relates to rotary operation parts such as a volume and an encoder, and more particularly to a mechanism for preventing deformation of the rotary operation shaft.
[0002]
[Prior art]
FIG. 5 shows an example of a conventional structure for attaching a rotary operation component such as a radio device. A bearing 2b that rotatably supports the rotation operation shaft 2a of the volume 2 shown in FIG. 5 is inserted into a hole in the chassis 1, and a nut 3 is screwed onto a male screw provided on the outer peripheral surface of the bearing 2b. The volume 2 is fixed to the chassis 1 by tightening the nut 3.
[0003]
Thus, the rotation operation shaft 2a of the volume 2 fixed to the chassis 1 protrudes from the hole of the case 5, and the rotation operation knob 7 is fitted to the rotation operation shaft 2a via the knob spring 8 so that the rotation operation knob 2 is fitted. 7 is fixed to the rotary operation shaft 2 a by friction caused by the elasticity of the knob spring 8. Then, the rotation operation shaft 2 a is rotated by the rotation device knob 7.
[0004]
A volume is attached to the radio device 10 shown in FIG. 6 by the mounting structure shown in FIG. 5, and the rotation operation knob 7 and the antenna 9 fitted to the rotation operation shaft of the volume are outside the case 5 of the radio device 10. It protrudes. When the wireless device 10 is tilted and dropped in the direction indicated by the arrow, when the wireless device 10 collides with the floor, the rotary operation knob 7 receives a strike force oblique to the axial direction.
[0005]
This striking force acts as a bending moment on the rotation operation shaft 2a. When the rotation operation shaft 2a is thin, the rotation operation shaft 2a is bent in the direction of the arrow in FIG. When the rotation operation shaft 2a is bent in this manner, the rotation operation shaft 2a cannot be rotated by the rotation operation knob 7, and there is a possibility that the switch cannot be turned on / off, the channel is changed, or the volume is not adjusted. Therefore, the diameter of the rotary operation shaft 2a has to be increased, which has been an obstacle for miniaturizing the radio.
[0006]
In the operating device proposed in Japanese Patent Application Laid-Open No. 11-189072, a rib that contacts the rotary operation shaft is provided behind the fitting hole of the operation knob that fits the rotary operation shaft, and the operation knob is pushed in the direction of the rotary operation axis. When the pressure is applied, the rib of the operation knob is deformed to prevent the rotation operation shaft from being deformed. It has also been proposed to form the operation knob with a material having a restoring property.
[0007]
However, in the above configuration, when the operation knob is made of a non-restorable material, the operation knob is damaged and needs to be replaced when an impact force is applied to the operation knob. When the operation knob is formed of a material having a restorability, the operation knob is soft, so that the quality of the apparatus is impaired. Furthermore, there has been a problem that bending of the rotary operation shaft cannot be prevented when a force perpendicular to the rotary operation shaft is applied to the operation knob.
[0008]
[Patent Document 1]
Japanese Patent Laid-Open No. 11-189072 (page 3, FIG. 1, FIG. 2)
[0009]
[Problems to be solved by the invention]
The present invention has been made in view of the above points, and an object of the present invention is to reduce the diameter of the rotary operation shaft of the rotary operation component even when a hard operation knob is fitted. It is an object of the present invention to provide a deformation preventing mechanism for a rotation operation shaft that prevents deformation of the rotation operation shaft when an impact force is applied to the rotation operation shaft.
[0010]
The mechanism for preventing deformation of the rotary operation shaft according to the present invention comprises:
A chassis in which a first hole is formed;
A second hole is formed and covers the chassis;
A rotational operation component having a rotational operation shaft, wherein the rotational operation shaft is inserted into the first hole and disposed at a position corresponding to the second hole, and the rotational operation shaft is rotatable. A rotating operation part fixed to the chassis with,
The rotating operation shaft is inserted into the recess, and a portion of the rotating operation shaft that is closer to the tip than the portion fixed to the chassis is inserted into the rotating operation shaft. said second projecting from the hole, the chassis flange of arranged disc-shaped so as to be sandwiched in a close state and the case is integrally formed on the lower, outer peripheral end of the flange from the edge portion of the concave side A rotation operation knob whose lower end surface extending to the upper part is positioned above the upper surface of the chassis ;
With
The lower end surface of the rotary operation knob is in a state of proximity to the chassis including an intermediate portion located in the middle between the end portion on the concave portion side and the outer peripheral end portion of the flange ,
When an external force in an oblique direction is applied to the rotation operation knob with respect to the rotation operation axis direction, the rotation is caused by a drag force between the lower end surface and the chassis upper surface and a drag force between the flange upper surface and the case lower surface. By restricting the displacement of the operation knob, the rotation operation shaft is prevented from being deformed by a bending moment received by the rotation operation shaft by the external force .
The rotation preventing shaft deformation preventing mechanism of the present invention further includes
The end of the case on the second hole side is located on the inner peripheral side of the outer peripheral end of the flange,
The flange has an upper surface of the flange that is close to a lower surface of the case between an end of the case on the second hole side and an outer peripheral end of the flange, and the lower surface and the chassis. However, it may be sandwiched between the chassis and the case by being arranged in the proximity state including the intermediate portion.
The rotation preventing shaft deformation preventing mechanism of the present invention further includes
In the outer periphery of the rotary operation knob, the diameter between the upper surface of the flange and the upper portion may be smaller than the diameter of the upper portion.
In addition, the portable wireless device of the present invention includes the above-described rotation preventing shaft deformation preventing mechanism.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
A mechanism for preventing deformation of a rotary operation shaft according to an embodiment of the present invention will be described with reference to the drawings. Figure 1 is a view to a cross-sectional view of the deformation preventing Organization of the rotary operation shaft which is an embodiment of the present invention.
[0012]
A bearing 2b that rotatably supports the rotation operation shaft 2a of the volume 2 shown in FIG. 1 is inserted into a hole in the chassis 1, and a nut 3 is screwed onto a male screw provided on the outer peripheral surface of the bearing 2b. The volume 2 is fixed to the chassis 1 by tightening the nut 3. Thus, the rotation operation knob 4 is fitted to the rotation operation shaft 2 a of the volume 2 fixed to the chassis 1, and the rotation operation shaft 2 a is rotated by the rotation operation knob 4.
[0013]
A flange 4a is integrally formed in a disk shape at the lower part of the rotary operation knob 4. The lower surface of the flange 4 a is close to the upper surface of the chassis 1. Although the chassis 1 is covered with the case 5, the upper surface of the flange 4 a is close to the lower surface of the case 5 . As described above, the flange 4 a of the rotary operation knob 4 is interposed between the chassis 1 and the case 5 in a close state. Since the case 5 is put on the flange 4a of the rotation operation knob 4, the rotation operation knob 4 can be removed from the rotation operation shaft 2a even if no knob spring is interposed between the rotation operation knob 4 and the rotation operation shaft 2a. There is nothing.
[0014]
FIG. 2 shows a state in which the case 5 is attached in a state where the rotary operation knob 4 is fitted to the volume attached to the chassis 1. 3 shows a state in which the chassis 1 having the volume and the rotation operation knob 4 attached to the case 6 is mounted. In this case, the flange 6a close to the flange 4a of the rotary operation knob 4 attached to the chassis to which the flange proximity surface 6a formed to protrude from the inner surface of the case 6 is mounted.
[0015]
FIG. 4 shows a state in which an external force in the direction of the arrow is applied to the rotary operation knob 4 of the embodiment. Although the rotation operation shaft to which the rotation operation knob 4 is fitted is subjected to a bending moment by this external force, the displacement of the flange 4a of the rotation operation knob 4 is restricted by the case 5 and the chassis 1 so that the rotation operation shaft is not deformed.
[0016]
The embodiment is configured as described above, but the invention is not limited to this. For example, the invention can be applied to an encoder, a rotary switch, etc. in addition to a volume as a rotary operation component.
[0017]
【Effect of the invention】
According to a variant mechanism for preventing rotational operation shaft of the present invention, by reducing the diameter of the rotary operation shaft can be formed radio or the like small. In addition, even if an impact force is applied to the knob that operates the rotation operation shaft due to a collision or the like, it is possible to prevent the rotation operation shaft from being deformed to impair the function, and there is no need to replace parts.
[0018]
When this invention is applied, it is only necessary to change the shape of the rotary operation knob as compared with the conventional rotary operation component mounting structure, and the number of parts and assembly man-hours are not increased.
[0019]
Further, since the case is put on the flange of the rotation operation knob, the rotation operation knob does not come off the rotation operation shaft even if a knob spring is not interposed between the rotation operation knob and the rotation operation shaft.
[0020]
Furthermore, the rotary operation knob can be made of a hard material, so that the quality of the product does not deteriorate.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a mechanism for preventing deformation of a rotary operation shaft according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view showing an assembled state of the deformation preventing mechanism.
FIG. 3 is an exploded perspective view showing another assembled state of the deformation prevention mechanism.
FIG. 4 is a perspective view showing the operation of the deformation preventing mechanism.
FIG. 5 is a cross-sectional view showing an example of a conventional rotating operation component mounting structure.
FIG. 6 is a perspective view showing a fall state of a radio device using the same rotating operation component mounting structure.
FIG. 7 is a perspective view showing a deformed state of the rotation operation shaft of the same rotation operation component.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Chassis 2 Volume, 2a Rotation operation shaft, 2b Bearing 3 Nut 4 Rotation operation knob, 4a Flange 5 Case 6 Case, 6a Flange proximity surface 7 Rotation operation knob 8 Knob spring 9 Antenna 10 Radio

Claims (4)

第１の穴が形成されているシャーシと、
第２の穴が形成され、前記シャーシを覆うケースと、
回転操作軸を有する回転操作部品であり、前記回転操作軸が前記第１の穴に挿入され、かつ、前記第２の穴と対応する位置に配置され、前記回転操作軸が回動自在の状態で前記シャーシに固定された回転操作部品と、
前記回転操作軸を挿入する凹部を有し、前記凹部に前記回転操作軸の前記シャーシに固定された部分よりも先端側の部分が挿入されることによって前記回転操作軸に嵌着され、上部が前記第２の穴から突出し、前記シャーシと前記ケースとに近接状態で挟まれるように配置された円板形状のフランジが下部に一体形成され、前記凹部側の端部から前記フランジの外周端部まで続く下端面が前記シャーシの上面よりも上側に位置する回転操作つまみと、
を備え、
前記回転操作つまみの前記下端面は前記凹部側の端部と前記フランジの外周端部との中間に位置する中間部を含めて前記シャーシと近接状態となっており、
前記回転操作つまみに前記回転操作軸方向に対して斜め方向の外力が加わった場合には、前記下端面と前記シャーシ上面との抗力、及び、前記フランジ上面と前記ケース下面との抗力により前記回転操作つまみの変位が規制されることで、前記外力により前記回転操作軸が受ける曲げモーメントによる前記回転操作軸の変形を防止する回転操作軸の変形防止機構。 A chassis in which a first hole is formed;
A second hole is formed and covers the chassis;
A rotational operation component having a rotational operation shaft, wherein the rotational operation shaft is inserted into the first hole and disposed at a position corresponding to the second hole, and the rotational operation shaft is rotatable. A rotating operation part fixed to the chassis with,
The rotating operation shaft is inserted into the recess, and a portion of the rotating operation shaft that is closer to the tip than the portion fixed to the chassis is inserted into the rotating operation shaft. said second projecting from the hole, the chassis flange of arranged disc-shaped so as to be sandwiched in a close state and the case is integrally formed on the lower, outer peripheral end of the flange from the edge portion of the concave side A rotation operation knob whose lower end surface extending to the upper part is positioned above the upper surface of the chassis ;
With
The lower end surface of the rotary operation knob is in a state of proximity to the chassis including an intermediate portion located in the middle between the end portion on the concave portion side and the outer peripheral end portion of the flange ,
When an external force in an oblique direction is applied to the rotation operation knob with respect to the rotation operation axis direction, the rotation is caused by a drag force between the lower end surface and the chassis upper surface and a drag force between the flange upper surface and the case lower surface. A deformation prevention mechanism for the rotation operation shaft that prevents deformation of the rotation operation shaft due to a bending moment received by the rotation operation shaft by the external force by restricting displacement of the operation knob . 前記ケースの前記第２の穴側の端部は前記フランジの外周端部よりも内周側に位置しており、The end of the case on the second hole side is located on the inner peripheral side of the outer peripheral end of the flange,
前記フランジは、前記フランジの上面が、前記ケースの前記第２の穴側の端部と前記フランジの外周端部と間で、前記ケースの下面と近接し、かつ、前記下端面と前記シャーシとが、前記中間部を含めて前記近接状態で配置されることにより、前記シャーシと前記ケースとに近接状態で挟まれていることを特徴とする請求項１に記載の回転操作軸の変形防止機構。The flange has an upper surface of the flange that is close to a lower surface of the case between an end of the case on the second hole side and an outer peripheral end of the flange, and the lower surface and the chassis. 2. The mechanism for preventing deformation of the rotation operation shaft according to claim 1, wherein the rotation operation shaft is sandwiched between the chassis and the case by being disposed in the proximity state including the intermediate portion. . 前記回転操作つまみの外周は、前記フランジの上面と前記上部との間の径が前記前記上部の径より小さくなっていることを特徴とする請求項１または２に記載の回転操作軸の変形防止機構。The outer periphery of the rotation operation knob has a diameter between the upper surface of the flange and the upper portion that is smaller than the diameter of the upper portion, and prevents deformation of the rotation operation shaft according to claim 1 or 2. mechanism. 請求項１から３に記載された回転操作軸の変形防止機構を備えた携帯無線機。 A portable wireless device comprising the rotation preventing shaft deformation preventing mechanism according to claim 1.
JP2003207231A 2003-08-12 2003-08-12 Deformation prevention mechanism for rotary operation shaft for portable wireless devices. Expired - Fee Related JP4925556B2 (en)

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