JP4620238B2 - Adjustable leg device - Google Patents

Adjustable leg device Download PDF

Info

Publication number
JP4620238B2
JP4620238B2 JP2000322177A JP2000322177A JP4620238B2 JP 4620238 B2 JP4620238 B2 JP 4620238B2 JP 2000322177 A JP2000322177 A JP 2000322177A JP 2000322177 A JP2000322177 A JP 2000322177A JP 4620238 B2 JP4620238 B2 JP 4620238B2
Authority
JP
Japan
Prior art keywords
lock member
shaft portion
operation member
protrusion
lock
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2000322177A
Other languages
Japanese (ja)
Other versions
JP2002130586A (en
Inventor
実 荒木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nifco Inc
Original Assignee
Nifco Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nifco Inc filed Critical Nifco Inc
Priority to JP2000322177A priority Critical patent/JP4620238B2/en
Publication of JP2002130586A publication Critical patent/JP2002130586A/en
Application granted granted Critical
Publication of JP4620238B2 publication Critical patent/JP4620238B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Description

【０００１】
【発明の属する技術分野】
本発明は、例えばプロジェクタの光軸角度やデスクの天板の水平度を調節するための調節脚装置に関するものである。
【０００２】
【従来の技術】
プロジェクタの光軸角度やデスクの天板の水平度を調節するために、回転変位を長さ変位に変換するねじ手段などを脚部に組み込むことが一般に行われている。このような高さ調節脚の昇降ストロークは、雌ねじと雄ねじとの間の相対的な回転角度で定まる。
【０００３】
ところが、例えばＩＳＯ規格に代表される如きねじの規格は、大荷重の静止支持を重視した摩擦角が得られるリード角となっているので、上記の如き高さ調節脚に用いるには一回転当たりのストロークが小さく、微細な調節を行うには好ましいが、迅速な調節を行うには不満足な面があった。
【０００４】
このような不都合を解消し得るものとして、先端に脚部が設けられたシャフトを貫通孔に挿通し、ばね付勢された押ボタン部材でシャフトを押圧することでシャフトの位置を固定すると共に、押ボタン部材を押すことでシャフトに作用する押圧力を解除して自由に位置調節が行えるようにした機構が、特許第２８０６３５８号公報に開示されている。
【０００５】
【発明が解決しようとする課題】
しかるに、上記の機構によると、迅速な調節が可能な反面、シャフト位置の固定力を専らばねによる圧接力に頼っているので、その摩擦力に打ち勝つ軸力がシャフトに作用した場合には、脚部のロック状態を保持し得ないという問題がある。
【０００６】
本発明は、このような従来技術の問題点を解消すべく案出されたものであり、その主な目的は、位置保持の信頼性と操作の容易性とをより一層高次元に両立し得るように改良された調節脚装置を提供することにある。
【０００７】
このような目的を果たすために、本発明は、プロジェクタなどの高さ又は角度を調節するための調節脚装置の構成を、接地端（実施の形態中の接地脚３）および該接地端から延出される軸部（実施の形態中のねじ軸５）を有する脚部材と、前記軸部を挿通させる垂直貫通孔（４）を備えたケーシング（２）と、前記軸部の軸線に直交する第１の軸線に沿って、前記軸部に対して接離移動可能なるように前記ケーシングに摺合したロック部材（１０）と、前記ロック部材を前記軸部に圧接する向きに付勢する付勢手段（実施の形態中の圧縮コイルばね９）と、前記第１の軸線回りに第１の位置と第２の位置との間で回転可能かつ前記第１の軸線方向に移動不能に前記ケーシングに対して設けられた操作部材（実施の形態中の操作レバー６）と、前記操作部材の回転運動を前記ロック部材の直線運動に変換するカム機構（１８）と、前記操作部材に設けられた操作部材側係合部と、前記ロック部材と一体に移動する部材に設けられたロック部材側係合部（実施の形態中の突起１９ａ、１９ｂ）とを有し、前記操作部材が前記第１の位置にあるときには、前記操作部材側係合部と前記ロック部材側係合部とが係合し、前記ロック部材の前記軸部から離間する移動が阻止されるとともに前記付勢手段の作用によって前記ロック部材が前記軸部に対して圧接され、前記操作部材が前記第２の位置にあるときには、前記操作部材側係合部と前記ロック部材側係合部との係合が解除されて前記ロック部材の前記軸部から離間する移動が許容され、前記操作部材の回転運動が前記カム機構を介して前記ロック部材に作用し、前記付勢手段の作用に抗して前記ロック部材が前記軸部に対して離間することを特徴とする。
【０００８】
これによれば、通常はロック部材に加わる圧接力で軸部の位置が保持され、且つ操作部材を操作しない限りロック部材が軸部から離間し得ないようにすることができる。そして操作部材を操作してロック部材を軸部から離間させることによって軸部の位置調節を自由に行うことができる。
【０００９】
また、ロック部材を軸部から離間させる操作を簡略化できる。また、操作力の方向を脚部材に加わる荷重の方向に一致させることができる。また、前記操作部材側係合部は、前記操作部材の前記ロック部材と対向する対向面であり、前記ロック部材側係合部は、前記ロック部材と一体に移動する部材に設けられた突起であり、前記対向面には前記突起を受容可能な孔が形成され、前記操作部材が前記第１の位置にあるときに、前記突起が前記操作部材の前記対向面に当接し、前記ロック部材の前記軸部から離間する移動が阻止される一方、前記操作部材が前記第２の位置にあるときに、前記第１の軸線方向から見て前記突起が前記孔に整合し、前記突起の前記孔への突入に応じて前記ロック部材の前記軸部から離間する移動が許容されることを特徴とする。また、前記カム機構は、前記操作部材が前記第１の位置に位置するときには、前記操作部材の回転運動を前記ロック部材の前記第１の軸線に沿った直線運動に変換しないように構成されていることを特徴とする。
【００１０】
また、軸部並びにロック部材は、互いに噛み合うねじ溝を備えることを特徴とするものとした。これにより、通常時の保持力がより一層高められ、しかもねじによる微細な調節が可能となる。
【００１１】
【発明の実施の形態】
以下に添付の図面を参照して本発明について詳細に説明する。
【００１２】
図１は、本発明に基づき構成された調節脚装置の全体を示している。この調節脚装置１は、プロジェクタなどの機器の筐体の底部に固定されるものであり、筐体に固定されるケーシング２と、その下端に接地脚３が取り付けられた上でケーシング２に設けられた垂直貫通孔４に挿通されたねじ軸５と、ねじ軸５のロック状態（後に詳述する）を解除するための操作レバー６とを備えている。
【００１３】
図２及び図３に併せて示すように、ケーシング２は、その中心軸線を水平方向に延在させた角筒状をなしており、垂直方向に摺動可能にねじ軸５を挿通する垂直貫通孔４がその一端側に設けられている。またケーシング２内には、水平方向のガイド孔７が形成されており、スライドブロック８が摺動可能に保持されている。このスライドブロック８は、ガイド孔７の端壁との間に縮接された圧縮コイルばね９によって弾発付勢されている。
【００１４】
ガイド孔７には、ねじ軸５の雄ねじ５ａに対応する雌ねじ１０ａが形成された半円形部を備えたロック部材１０も摺合している。このロック部材１０が当接してねじ軸５の雄ねじ５ａにロック部材１０の雌ねじ１０ａが噛み合うことにより、ねじ軸５の軸方向変位が規制されるようになっている。なお、ねじ軸５は、その上端に嵌着されたＥリング１１によってケーシング２からの抜け止めがなされている。
【００１５】
ロック部材１０の背面には、水平軸１２が延出されており、上記したスライドブロック８がその遊端に一体的に結合されている。つまりロック部材１０は、スライドブロック８と共にケーシング２内を水平方向に移動可能であり、且つねじ軸５の雄ねじ５ａに雌ねじ１０ａを噛み合わせる向きに圧縮コイルばね９によって常時弾発付勢されている。
【００１６】
ロック部材１０の水平軸１２の中間部には、操作レバー６に一体形成された中心ボス１３が嵌着されている。この中心ボス１３は、軸方向移動不能に且つ所定角度範囲を回動可能なるように、ケーシング２の側面に設けられたスロット１４に突起１５をもって係合しており、ケーシング２から突出した操作レバー６の操作により、水平軸１２を中心にして回動し得るようになっている。
【００１７】
スライドブロック８と中心ボス１３との軸方向対向部には、図４並びに図５に示すように、円周方向に等間隔をおく複数の台形の山１６・１７からなるカム機構１８が設けられている。これらスライドブロック８と中心ボス１３との山１６・１７同士は、所定の周方向隙間Ｇをおいて互いに合わさるようにされている。
【００１８】
図６に併せて示すように、水平軸１２の基端部の外周面には、リブ状をなす一対の突起１９ａ・１９ｂが略９０度の角度をおいて設けられている。これらの突起１９ａ・１９ｂは、ロック部材１０の雌ねじ１０ａがねじ軸５の雄ねじ５ａに噛み合った状態時に、ロック部材１０と中心ボス１３との互いの対向面間に開いた隙間と略等しい軸方向寸法とされている。
【００１９】
また、中心ボス１３のロック部材１０との対向面側には、断面形状が扇形をなし、上記突起１９ａ・１９ｂの全体を受容可能な大きさの軸方向孔２０ａ・２０ｂが、２つ設けられている。
【００２０】
次に本発明装置の操作要領について説明する。
【００２１】
通常は、スライドブロック８に加わる圧縮コイルばね９の弾発力でロック部材１０がねじ軸５に押し当てられているので、ねじ軸５の雄ねじ５ａにロック部材１０の雌ねじ１０ａが噛み合い状態にある。従って、ねじ軸５を回転させることにより、ねじのリード角で定まる回転角度に応じた軸方向変位量がねじ軸５に与えられる。
【００２２】
この状態では、図６に示したように、ロック部材１０の背面から水平軸１２に沿って延設されたリブ状をなす一対の突起１９ａ・１９ｂの軸方向端面の一部が中心ボス１３の端面に干渉するため、これがストッパ手段となり、圧縮コイルばね９の弾発力がよしんば消失したとしても、ねじ軸５の雄ねじ５ａとロック部材１０の雌ねじ１０ａとの噛み合い状態が保持される。
【００２３】
操作レバー６を押し上げて中心ボス１３を回転させると、先ず、両カム山１６・１７間の隙間Ｇの分だけ中心ボス１３が遊び回動する。そしてこの一段目の回動により、一対の突起１９ａ・１９ｂの軸方向端面が中心ボス１３の扇形をなす軸方向孔２０ａ・２０ｂの開口に整合する（図７−ａ参照）。
【００２４】
この状態から、中心ボス１３をさらに回動させると、軸方向に移動し得ない中心ボス１３側のカム山１７の斜面にスライドブロック８側のカム山１６が乗り上げるので、スライドブロック８が圧縮コイルばね９を押し縮めつつ左方へ移動する（図５参照）。このスライドブロック８の左方変位に伴われてスライドブロック８に一体結合したロック部材１０が左方へと変位する。この２段目の回動は、一対のリブ状突起１９ａ・１９ｂが扇形の軸方向孔２０ａ・２０ｂ内に受容されることで許容される（図７−ｂ参照）。
【００２５】
以上の如くして、ロック部材１０の雌ねじ１０ａがねじ軸５の雄ねじ５ａから離れるので、ねじ軸５は自由になる。そこでねじ軸５の軸線方向位置を適宜にセットし、再び操作レバー６を戻せば、ロック部材１０が圧縮コイルばね９の押圧力によってその雌ねじ１０ａをねじ軸５の雄ねじ５ａに押し当てるので、ねじ軸５が軸線方向移動不能となってその位置が保持される。またこの状態では、ねじ軸５を回転させれば、ねじのリード角に従ってねじ軸５が軸線方向に変位するので、通常の調節脚と同様の微調整を行うことができる。
【００２６】
上記の如き構成、つまり操作レバー６の回転軸をねじ軸５の軸線に直交させるものとすれば、ねじ軸５のロックを解除する操作力の方向が接地脚３に加わる荷重の方向と対向するので、高さ調節を行うために無駄な力を加える必要がなくなる。
【００２７】
また、上記の如きカム機構１８を採用することにより、カム山１６・１７の傾斜角度を変更するだけで、ねじ軸５に対するロック部材１０の押圧力を変えることなく、操作レバー６の操作ストロークを適切に設定することができる。
【００２８】
なお、各カム山１６・１７の頂部は切除されており、軸方向に直交する平担面１６ａ・１７ａが形成されているので、操作レバー６を一杯回動させた時に互いのカム山の頂部の平坦面１６ａ・１７ａ同士が当接するように回動角度を設定すれば、操作レバー６から手を離してもスライドブロック８が押し戻されなくなってねじ軸５のフリー状態を維持し得るものとすることができる。そしてこの場合は、操作レバー６を少し戻してカム山の頂部の平坦面１６ａ・１７ａ同士の当接を解除すれば、自然に両者の山と谷とがはまり合ってスライドブロック８が押し出される。
【００２９】
【発明の効果】
このように本発明によれば、脚部の軸線方向位置のロック状態とロック解除状態とを簡単な操作で選択することができるので、粗調整と微調整とを容易に切り替えることができる。しかも通常時はロック状態が解除されないので、調節脚装置の使用性および保持信頼性を向上する上に多大な効果を奏することができる。
【図面の簡単な説明】
【図１】本発明装置の全体斜視図
【図２】図１におけるII−II線に沿う側断面図
【図３】図３におけるIII−III線に沿って一部切除して示す本発明装置の正面図
【図４】ロック状態を示すカム機構の作動説明図
【図５】ロック解除状態を示すカム機構の作動説明図
【図６】ロック状態時のストッパ手段の作用説明図
【図７】ロック解除時のストッパ手段の作用説明図
【符号の説明】
１ 調節脚装置
２ ケーシング
３ 接地脚
４ 垂直貫通孔
５ ねじ軸
６ 操作レバー
７ ガイド孔
８ スライドブロック
９ 圧縮コイルばね
１０ ロック部材
１２ 水平軸
１３ 中心ボス
１６ カム山（スライドブロック側）
１７ カム山（中心ボス側）
１８ カム機構
１９ａ・１９ｂ 突起
２０ａ・２０ｂ 軸方向孔[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an adjusting leg device for adjusting, for example, an optical axis angle of a projector and a level of a desk top plate.
[0002]
[Prior art]
In order to adjust the optical axis angle of the projector and the level of the desk top plate, a screw means for converting rotational displacement into length displacement is generally incorporated in the leg portion. Such a lifting stroke of the height adjusting leg is determined by a relative rotation angle between the female screw and the male screw.
[0003]
However, for example, the screw standard represented by the ISO standard is a lead angle that gives a friction angle that places importance on stationary support under heavy loads. The stroke is small and is preferable for fine adjustment, but is unsatisfactory for quick adjustment.
[0004]
As a thing that can eliminate such inconvenience, while inserting the shaft provided with a leg portion at the tip into the through hole and pressing the shaft with a push button member biased by a spring, the position of the shaft is fixed, Japanese Patent No. 2806358 discloses a mechanism that allows the position to be freely adjusted by releasing the pressing force acting on the shaft by pressing the push button member.
[0005]
[Problems to be solved by the invention]
However, according to the above mechanism, quick adjustment is possible, but the fixing force of the shaft position depends exclusively on the pressure contact force of the spring, so if the axial force that overcomes the friction force acts on the shaft, There is a problem that the locked state of the part cannot be maintained.
[0006]
The present invention has been devised in order to solve such problems of the prior art, and its main purpose is to achieve both higher level of reliability of position holding and ease of operation. It is an object of the present invention to provide an improved adjusting leg device.
[0007]
In order to achieve such an object, the present invention extends the configuration of an adjustment leg device for adjusting the height or angle of a projector or the like from the grounding end (the grounding leg 3 in the embodiment) and the grounding end. A leg member having a shaft portion (screw shaft 5 in the embodiment) to be taken out, a casing (2) having a vertical through hole (4) through which the shaft portion is inserted, and a first member orthogonal to the axis of the shaft portion. A lock member (10) slidably engaged with the casing so as to be movable toward and away from the shaft portion along the axis of one, and a biasing means for biasing the lock member in a direction in which the lock member is pressed against the shaft portion (Compression coil spring 9 in the embodiment) and the casing that can rotate between the first position and the second position around the first axis and cannot move in the first axial direction. an operation provided Te member (operating lever 6 in the embodiment), The cam mechanism (18) that converts the rotational motion of the operation member into the linear motion of the lock member, the operation member side engaging portion provided in the operation member, and the member that moves integrally with the lock member. And when the operation member is in the first position, the operation member side engagement portion and the lock member side engagement are provided with the lock member side engagement portion (projections 19a and 19b in the embodiment). And the locking member is prevented from moving away from the shaft portion, and the locking member is pressed against the shaft portion by the action of the biasing means, and the operation member is moved to the second portion. When the operation member is in the position, the engagement between the operation member side engagement portion and the lock member side engagement portion is released, and the movement away from the shaft portion of the lock member is allowed, and the rotation movement of the operation member is allowed. Before the cam mechanism Acts on the locking member, the locking member against the action of said biasing means, characterized in that apart from the said shank.
[0008]
According to this, the position of the shaft portion is normally held by the pressure contact force applied to the lock member, and the lock member cannot be separated from the shaft portion unless the operation member is operated. The position of the shaft portion can be freely adjusted by operating the operation member to separate the lock member from the shaft portion.
[0009]
Further, it is possible to simplify the operation of separating lock member from the shaft. Further, the direction of the operating force can be matched with the direction of the load applied to the leg member. The operating member side engaging portion is a facing surface of the operating member facing the locking member, and the locking member side engaging portion is a protrusion provided on a member that moves integrally with the locking member. A hole that can receive the protrusion is formed on the facing surface, and when the operation member is in the first position, the protrusion abuts on the facing surface of the operation member; While the movement away from the shaft portion is prevented, the protrusion aligns with the hole when viewed from the first axial direction when the operating member is in the second position, and the hole of the protrusion The lock member is allowed to move away from the shaft portion in accordance with the entry into the shaft. The cam mechanism is configured not to convert the rotational motion of the operating member into linear motion along the first axis of the lock member when the operating member is located at the first position. It is characterized by being.
[0010]
Further, the shaft portion and the lock member are provided with screw grooves that mesh with each other. As a result, the normal holding force can be further increased, and fine adjustment with screws can be performed.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
[0012]
FIG. 1 shows the entirety of an adjusting leg device constructed according to the invention. This adjusting leg device 1 is fixed to the bottom of a casing of a device such as a projector, and is provided in the casing 2 with a casing 2 fixed to the casing and a grounding leg 3 attached to the lower end thereof. The screw shaft 5 inserted through the vertical through-hole 4 and the operation lever 6 for releasing the locked state (described in detail later) of the screw shaft 5 are provided.
[0013]
As shown in FIGS. 2 and 3, the casing 2 has a rectangular tube shape with its central axis extending in the horizontal direction, and is vertically penetrated through the screw shaft 5 so as to be slidable in the vertical direction. A hole 4 is provided on one end side thereof. A horizontal guide hole 7 is formed in the casing 2, and a slide block 8 is slidably held. The slide block 8 is elastically biased by a compression coil spring 9 which is compressed and contacted with the end wall of the guide hole 7.
[0014]
A lock member 10 having a semicircular portion in which a female screw 10 a corresponding to the male screw 5 a of the screw shaft 5 is formed is also slidably engaged with the guide hole 7. When the lock member 10 abuts and the female screw 10a of the lock member 10 meshes with the male screw 5a of the screw shaft 5, the axial displacement of the screw shaft 5 is regulated. The screw shaft 5 is prevented from being detached from the casing 2 by an E-ring 11 fitted to the upper end thereof.
[0015]
A horizontal shaft 12 extends from the back surface of the lock member 10 and the above-described slide block 8 is integrally coupled to the free end thereof. That is, the lock member 10 can move in the casing 2 together with the slide block 8 in the horizontal direction, and is always elastically biased by the compression coil spring 9 in a direction in which the female screw 10 a is engaged with the male screw 5 a of the screw shaft 5. .
[0016]
A central boss 13 formed integrally with the operation lever 6 is fitted in an intermediate portion of the horizontal shaft 12 of the lock member 10. The central boss 13 is engaged with a slot 15 provided on the side surface of the casing 2 with a protrusion 15 so as not to be axially movable and rotatable within a predetermined angle range, and an operation lever protruding from the casing 2. By the operation 6, it can be rotated about the horizontal axis 12.
[0017]
As shown in FIGS. 4 and 5, a cam mechanism 18 including a plurality of trapezoidal peaks 16 and 17 that are equally spaced in the circumferential direction is provided at the axially facing portion between the slide block 8 and the center boss 13. ing. The peaks 16 and 17 of the slide block 8 and the central boss 13 are arranged to be aligned with each other with a predetermined circumferential gap G.
[0018]
As shown in FIG. 6, a pair of rib-shaped protrusions 19 a and 19 b are provided on the outer peripheral surface of the base end portion of the horizontal shaft 12 at an angle of approximately 90 degrees. These protrusions 19a and 19b have an axial direction substantially equal to a gap opened between the opposing surfaces of the lock member 10 and the central boss 13 when the female screw 10a of the lock member 10 is engaged with the male screw 5a of the screw shaft 5. It is a dimension.
[0019]
Further, two axial holes 20a and 20b having a size that can receive the entire protrusions 19a and 19b are provided on the side of the central boss 13 that faces the lock member 10 in a sector shape. ing.
[0020]
Next, the operation procedure of the device of the present invention will be described.
[0021]
Normally, since the lock member 10 is pressed against the screw shaft 5 by the elastic force of the compression coil spring 9 applied to the slide block 8, the female screw 10a of the lock member 10 is engaged with the male screw 5a of the screw shaft 5. . Therefore, by rotating the screw shaft 5, an axial displacement amount corresponding to the rotation angle determined by the lead angle of the screw is given to the screw shaft 5.
[0022]
In this state, as shown in FIG. 6, a part of the axial end surfaces of the pair of protrusions 19 a and 19 b forming a rib shape extending from the back surface of the lock member 10 along the horizontal shaft 12 is the center boss 13. Since it interferes with the end face, this becomes a stopper means, and even if the elastic force of the compression coil spring 9 disappears, the meshing state of the male screw 5a of the screw shaft 5 and the female screw 10a of the lock member 10 is maintained.
[0023]
When the operation lever 6 is pushed up to rotate the center boss 13, first, the center boss 13 is freely rotated by the gap G between the cam peaks 16 and 17. Then, by the rotation of the first stage, the axial end surfaces of the pair of protrusions 19a and 19b are aligned with the openings of the axial holes 20a and 20b forming the sector shape of the central boss 13 (see FIG. 7A).
[0024]
If the center boss 13 is further rotated from this state, the cam crest 16 on the slide block 8 side rides on the slope of the cam crest 17 on the side of the center boss 13 that cannot move in the axial direction. The spring 9 is moved to the left while being compressed (see FIG. 5). Along with the leftward displacement of the slide block 8, the lock member 10 integrally coupled to the slide block 8 is displaced to the left. This second-stage rotation is permitted by receiving the pair of rib-shaped protrusions 19a and 19b in the fan-shaped axial holes 20a and 20b (see FIG. 7B).
[0025]
As described above, since the female screw 10a of the lock member 10 is separated from the male screw 5a of the screw shaft 5, the screw shaft 5 becomes free. Therefore, if the axial position of the screw shaft 5 is appropriately set and the operation lever 6 is returned again, the lock member 10 presses the female screw 10a against the male screw 5a of the screw shaft 5 by the pressing force of the compression coil spring 9, so that the screw The shaft 5 cannot move in the axial direction, and its position is maintained. Further, in this state, if the screw shaft 5 is rotated, the screw shaft 5 is displaced in the axial direction according to the lead angle of the screw, so that fine adjustment similar to that of a normal adjusting leg can be performed.
[0026]
If the configuration as described above, that is, the rotation axis of the operation lever 6 is orthogonal to the axis of the screw shaft 5, the direction of the operation force for releasing the lock of the screw shaft 5 opposes the direction of the load applied to the grounding leg 3. Therefore, it is not necessary to apply useless force to adjust the height.
[0027]
Further, by adopting the cam mechanism 18 as described above, the operation stroke of the operation lever 6 can be increased without changing the pressing force of the lock member 10 against the screw shaft 5 only by changing the inclination angle of the cam peaks 16 and 17. It can be set appropriately.
[0028]
The tops of the cam ridges 16 and 17 are cut off, and flat surfaces 16a and 17a perpendicular to the axial direction are formed. Therefore, when the operating lever 6 is fully rotated, the tops of the cam ridges of each other If the rotation angle is set so that the flat surfaces 16a and 17a come into contact with each other, the slide block 8 will not be pushed back even if the hand is released from the operation lever 6, and the free state of the screw shaft 5 can be maintained. be able to. In this case, if the operation lever 6 is returned a little to release the contact between the flat surfaces 16a and 17a at the top of the cam crest, both the crests and troughs naturally fit together and the slide block 8 is pushed out.
[0029]
【The invention's effect】
As described above, according to the present invention, the locked state and the unlocked state of the position of the leg in the axial direction can be selected by a simple operation, so that the rough adjustment and the fine adjustment can be easily switched. In addition, since the locked state is not released normally, a great effect can be achieved in improving the usability and holding reliability of the adjusting leg device.
[Brief description of the drawings]
1 is an overall perspective view of the apparatus of the present invention. FIG. 2 is a side sectional view taken along line II-II in FIG. 1. FIG. 3 is an apparatus of the present invention partially cut away along line III-III in FIG. FIG. 4 is an explanatory diagram of the operation of the cam mechanism showing the locked state. FIG. 5 is an explanatory diagram of the operation of the cam mechanism showing the unlocked state. FIG. 6 is an explanatory diagram of the action of the stopper means in the locked state. Action diagram of stopper means when unlocking [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Adjustment leg apparatus 2 Casing 3 Grounding leg 4 Vertical through-hole 5 Screw shaft 6 Operation lever 7 Guide hole 8 Slide block 9 Compression coil spring 10 Locking member 12 Horizontal shaft 13 Center boss 16 Cam mountain (slide block side)
17 Mount Cam (center boss side)
18 Cam mechanism 19a, 19b Protrusion 20a, 20b Axial hole

Claims (4)

プロジェクタなどの高さ又は角度を調節するための調節脚装置であって、
接地端および該接地端から延出される軸部を有する脚部材と、
前記軸部を挿通させる垂直貫通孔を備えたケーシングと、
前記軸部の軸線に直交する第１の軸線に沿って、前記軸部に対して接離移動可能なるように前記ケーシングに摺合したロック部材と、
前記ロック部材を前記軸部に圧接する向きに付勢する付勢手段と、
前記第１の軸線回りに第１の位置と第２の位置との間で回転可能かつ前記第１の軸線方向に移動不能に前記ケーシングに対して設けられた操作部材と、
前記操作部材の回転運動を前記ロック部材の直線運動に変換するカム機構と、
前記操作部材に設けられた操作部材側係合部と、
前記ロック部材と一体に移動する部材に設けられたロック部材側係合部と
を有し、
前記操作部材が前記第１の位置にあるときには、前記操作部材側係合部と前記ロック部材側係合部とが係合し、前記ロック部材の前記軸部から離間する移動が阻止されるとともに前記付勢手段の作用によって前記ロック部材が前記軸部に対して圧接され、前記操作部材が前記第２の位置にあるときには、前記操作部材側係合部と前記ロック部材側係合部との係合が解除されて前記ロック部材の前記軸部から離間する移動が許容され、前記操作部材の回転運動が前記カム機構を介して前記ロック部材に作用し、前記付勢手段の作用に抗して前記ロック部材が前記軸部に対して離間することを特徴とする調節脚装置。An adjusting leg device for adjusting the height or angle of a projector or the like,
A leg member having a grounding end and a shaft portion extending from the grounding end;
A casing having a vertical through-hole through which the shaft portion is inserted;
A lock member slidably engaged with the casing so as to be movable toward and away from the shaft portion along a first axis perpendicular to the axis of the shaft portion;
An urging means for urging the lock member in a direction in pressure contact with the shaft portion;
An operating member provided to the casing that is rotatable between a first position and a second position around the first axis and is immovable in the first axis direction ;
A cam mechanism for converting the rotational movement of the operation member into the linear movement of the lock member;
An operation member side engagement portion provided on the operation member;
A locking member side engaging portion provided on a member that moves integrally with the locking member;
Have
When the operation member is in the first position, the operation member side engagement portion and the lock member side engagement portion are engaged, and movement of the lock member away from the shaft portion is prevented. When the lock member is pressed against the shaft portion by the action of the urging means and the operation member is in the second position, the operation member side engagement portion and the lock member side engagement portion are The engagement is released and the movement of the lock member away from the shaft portion is allowed, and the rotational movement of the operation member acts on the lock member via the cam mechanism to resist the action of the biasing means. The adjusting leg device is characterized in that the lock member is separated from the shaft portion . 前記操作部材側係合部は、前記操作部材の前記ロック部材と対向する対向面であり、The operating member side engaging portion is a facing surface facing the lock member of the operating member,
前記ロック部材側係合部は、前記ロック部材と一体に移動する部材に設けられた突起であり、The lock member side engaging portion is a protrusion provided on a member that moves integrally with the lock member,
前記対向面には前記突起を受容可能な孔が形成され、A hole capable of receiving the protrusion is formed on the facing surface,
前記操作部材が前記第１の位置にあるときに、前記突起が前記操作部材の前記対向面に当接し、前記ロック部材の前記軸部から離間する移動が阻止される一方、前記操作部材が前記第２の位置にあるときに、前記第１の軸線方向から見て前記突起が前記孔に整合し、前記突起の前記孔への突入に応じて前記ロック部材の前記軸部から離間する移動が許容されることを特徴とする、請求項１に記載の調節脚装置。When the operation member is in the first position, the protrusion abuts against the facing surface of the operation member and is prevented from moving away from the shaft portion of the lock member. When in the second position, the protrusion is aligned with the hole when viewed from the first axial direction, and the lock member moves away from the shaft portion in response to the protrusion of the protrusion into the hole. The adjusting leg device according to claim 1, wherein the adjusting leg device is allowed. 前記カム機構は、前記操作部材が前記第１の位置に位置するときには、前記操作部材の回転運動を前記ロック部材の前記第１の軸線に沿った直線運動に変換しないように構成されていることを特徴とする、請求項１または請求項２に記載の調節脚装置。The cam mechanism is configured not to convert the rotational movement of the operation member into a linear movement along the first axis of the lock member when the operation member is located at the first position. The adjusting leg device according to claim 1 or 2, characterized by the above. 前記軸部並びに前記ロック部材は、互いに噛み合うねじ溝を備えることを特徴とする請求項１〜請求項３のいずれかの項に記載の調節脚装置。The adjusting leg device according to any one of claims 1 to 3, wherein the shaft portion and the lock member include screw grooves that mesh with each other.
JP2000322177A 2000-10-23 2000-10-23 Adjustable leg device Expired - Fee Related JP4620238B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000322177A JP4620238B2 (en) 2000-10-23 2000-10-23 Adjustable leg device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000322177A JP4620238B2 (en) 2000-10-23 2000-10-23 Adjustable leg device

Publications (2)

Publication Number Publication Date
JP2002130586A JP2002130586A (en) 2002-05-09
JP4620238B2 true JP4620238B2 (en) 2011-01-26

Family

ID=18800097

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000322177A Expired - Fee Related JP4620238B2 (en) 2000-10-23 2000-10-23 Adjustable leg device

Country Status (1)

Country Link
JP (1) JP4620238B2 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3789312B2 (en) * 2001-03-29 2006-06-21 株式会社ニックス Adjustable feet for equipment
JP2007162789A (en) * 2005-12-13 2007-06-28 Togo Seisakusho Corp Nut
JP5401338B2 (en) * 2009-06-18 2014-01-29 日立コンシューマエレクトロニクス株式会社 Projection display device
CN101957548B (en) * 2009-07-20 2012-01-25 鸿富锦精密工业（深圳）有限公司 Elevator assembly and projector therewith
JP5566125B2 (en) * 2010-01-26 2014-08-06 愛知株式会社 Adjuster structure and adjuster member
CN105033552A (en) * 2015-08-28 2015-11-11 合肥常青机械股份有限公司 Welding clamp for heavy truck bumper assembly
CN106125470B (en) * 2016-08-19 2018-05-15 明基智能科技（上海）有限公司 Projector
CN110307452B (en) * 2018-12-29 2024-03-29 常熟市奥斯维车辆科技有限公司 Four-linkage six-degree-of-freedom fine adjustment mechanism
CN112128524B (en) * 2019-06-24 2023-05-09 深圳市道通科技股份有限公司 Support device
WO2023093154A1 (en) * 2021-11-25 2023-06-01 中普（天津）科技有限公司 Appointment registration device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03127620U (en) * 1990-04-04 1991-12-24
JPH0536439U (en) * 1991-04-26 1993-05-18 シヤープ株式会社 Equipment adjustment legs
WO1998012601A1 (en) * 1996-09-19 1998-03-26 Seiko Epson Corporation Projector
JP2000019479A (en) * 1998-06-30 2000-01-21 Hitachi Ltd Liquid crystal projector
JP2000138467A (en) * 1998-10-30 2000-05-16 Nikko Ind Corp Adjustable leg for apparatus
JP2001263579A (en) * 2000-03-22 2001-09-26 Takigen Mfg Co Ltd Fitting type adjustable leg for equipment

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR0110758Y1 (en) * 1994-10-31 1997-12-02 Daewoo Electronics Co Ltd Device for controlling an angle of electronic equipment
JP3349302B2 (en) * 1995-08-14 2002-11-25 三洋電機株式会社 Projector and height adjustment tool
JPH09236195A (en) * 1996-02-29 1997-09-09 Nikko Kogyo Kk Adjusting leg for apparatus
JP2806358B2 (en) * 1996-04-19 1998-09-30 日本電気株式会社 Tilt foot structure
JPH10332077A (en) * 1997-05-28 1998-12-15 Nifco Inc Height adjusting implement
JPH1182881A (en) * 1997-08-29 1999-03-26 Nikko Ind Corp Adjusting leg for equipment
JPH11352586A (en) * 1998-06-10 1999-12-24 Nikon Corp Display device with inclination angle regulating function

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03127620U (en) * 1990-04-04 1991-12-24
JPH0536439U (en) * 1991-04-26 1993-05-18 シヤープ株式会社 Equipment adjustment legs
WO1998012601A1 (en) * 1996-09-19 1998-03-26 Seiko Epson Corporation Projector
JP2000019479A (en) * 1998-06-30 2000-01-21 Hitachi Ltd Liquid crystal projector
JP2000138467A (en) * 1998-10-30 2000-05-16 Nikko Ind Corp Adjustable leg for apparatus
JP2001263579A (en) * 2000-03-22 2001-09-26 Takigen Mfg Co Ltd Fitting type adjustable leg for equipment

Also Published As

Publication number Publication date
JP2002130586A (en) 2002-05-09

Similar Documents

Publication Publication Date Title
JP4620238B2 (en) Adjustable leg device
US7787795B2 (en) Angle adjustment device and image forming apparatus
JP4620226B2 (en) Adjustable leg device
KR100984957B1 (en) The camera pan head having two clamps locked connector
JPH02114901A (en) Ski boots
JP3706255B2 (en) Caster equipment
CN108286281B (en) Fastening device for shower nozzle
JP3106976B2 (en) One-touch type adjuster
EP1557853A1 (en) Push button switch for vehicle
US6921173B2 (en) Tilt-foot mechanism for projector
JP3919888B2 (en) Telescopic handle for suitcase
JP2008185074A (en) Height adjusting mechanism
KR20160057631A (en) Structure for locking/unlocking tilt for steering column
KR102177120B1 (en) Clamping device
JP2008094254A (en) Locking device and steering system equipped with it
JP3551935B2 (en) Leg length adjustment device
CN216301369U (en) Leg rest assembly and balance car with same
JP4477042B2 (en) Slide latch device
JP4910136B2 (en) Armrest device
US11829055B2 (en) Clamping mechanism
JP2003049811A (en) Elevating leg tool
JPH0635574Y2 (en) Video camera mounting device
TWI772194B (en) Caster device
JPH0619719Y2 (en) Locking button
JPS6037782Y2 (en) Simultaneous lock prevention mechanism

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20070323

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20100105

RD13 Notification of appointment of power of sub attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7433

Effective date: 20100302

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20100303

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A821

Effective date: 20100302

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20101012

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20101028

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20131105

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

LAPS Cancellation because of no payment of annual fees