JP3043179U - Lens and mirror elevation angle adjustment mechanism for under mirror type overhead projector - Google Patents
Lens and mirror elevation angle adjustment mechanism for under mirror type overhead projectorInfo
- Publication number
- JP3043179U JP3043179U JP1997003690U JP369097U JP3043179U JP 3043179 U JP3043179 U JP 3043179U JP 1997003690 U JP1997003690 U JP 1997003690U JP 369097 U JP369097 U JP 369097U JP 3043179 U JP3043179 U JP 3043179U
- Authority
- JP
- Japan
- Prior art keywords
- screw
- mirror
- elevation angle
- connecting member
- angle adjusting
- 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 - Lifetime
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- Overhead Projectors And Projection Screens (AREA)
Abstract
(57)【要約】
【課題】操作が簡単、且つ安全で、支柱をコンパクトに
収納可能なアンダーミラー方式オーバーヘッドプロジェ
クタの仰角調整機構を提供する。
【解決手段】ミラー部３と投影レンズ部６とを同軸に軸
着して備えたヘッド部と、ヘッド部を支持する支柱と、
支柱折畳み機構を備えたアンダーミラー方式オーバーヘ
ッドプロジェクタにおいて、ミラー部３と投影レンズ部
３の前記軸から異なる半径の部位にそれぞれ設けられた
調整軸５ｂ，８ｂを遊嵌せしめると共に、前記軸を中心
とする円の接線に平行に螺子を遊嵌せしめ且つ螺子の撮
みを支持しうるように形成された支持金具１０と、調整
軸５ｂ，８ｂを連結すると共に支持金具１０に遊嵌せし
められる螺子に螺合可能となるように形成された連結部
材１１と、支持金具１０及び連結部材１１を貫通する撮
み付き螺子１２とを備えている。
(57) An object of the present invention is to provide an elevation angle adjusting mechanism of an under-mirror type overhead projector that is easy and safe to operate, and that can support a column in a compact manner. SOLUTION: A head portion provided with a mirror portion 3 and a projection lens portion 6 coaxially attached to each other, and a column supporting the head portion,
In an under-mirror type overhead projector having a support column folding mechanism, adjustment shafts 5b and 8b respectively provided at portions of the mirror portion 3 and the projection lens portion 3 having different radii from the axes are loosely fitted, and at the same time, the adjustment axes 5b and 8b are used as centers. To the screw that is loosely fitted to the support metal fitting 10 formed by connecting the adjustment shafts 5b and 8b with the support metal fitting 10 formed so that the screw can be loosely fitted parallel to the tangent of the circle It is provided with a connecting member 11 formed so as to be screwed, and a captured screw 12 penetrating the support fitting 10 and the connecting member 11.
Description
【０００１】[0001]
本考案は、支柱折り畳み機構を備えたアンダーミラー方式オーバーヘッドプロ ジェクタのミラーと投影レンズとの仰角を調整する機構に関する。 The present invention relates to a mechanism for adjusting an elevation angle between a mirror and a projection lens of an under mirror type overhead projector equipped with a strut folding mechanism.
【０００２】[0002]
オーバーヘッドプロジェクタは、一般的に、プロジェクタの本体内部に照射手 段として照明光学系，集光学系等を備え、本体外部に被投影物を載置すると共に 照明光を透過させて該被投影物を照射可能にするステージガラスと、透過光によ る被投影物の像を結像する投影光学系と光軸の向きを変換するミラーを有するヘ ッド部と、ヘッド部を支持する支柱とを備え、ステージガラス上に載置された被 投影物の像をスクリーン等の上に投影するようになっているが、このときの投影 位置は、投影レンズとミラーとの仰角を変えることによって調整されるようにな っている。 An overhead projector is generally equipped with an illumination optical system, a collection optical system, etc. as an irradiation means inside the main body of the projector, mounts the projection object outside the main body, and transmits the illumination light to project the projection object. The stage glass that enables irradiation, the projection optical system that forms the image of the projection object by the transmitted light, the head section that has the mirror that changes the direction of the optical axis, and the support column that supports the head section are provided. The image of the projection object placed on the stage glass is projected on the screen etc., but the projection position at this time is adjusted by changing the elevation angle between the projection lens and the mirror. It has become so.
【０００３】 図１０は、オーバーミラー方式オーバーヘッドプロジェクタのヘッド部の従来 例を示す斜視図である。 レンズ部５１が、支柱に固定される一方、ミラー５２が、レンズ部５１の上方 に、軸５３を中心として回動可能に配置されており、レンズとミラーの仰角調整 は、レンズ部５１の位置を固定した状態で、ミラー５２を矢印方向に回動して行 うようになっている。 しかし、スクリーン上に適切な結像状態及び大きさで投影するためには、レン ズ部と被投影物との間に所定量の距離をとる必要があるので、オーバーミラー方 式オーバーヘッドプロジェクタの如くレンズ部の上部にミラーを配置すると、ミ ラーがスクリーン上の投影像を観察する際に邪魔になる。FIG. 10 is a perspective view showing a conventional example of a head portion of an over-mirror type overhead projector. The lens unit 51 is fixed to the column, while the mirror 52 is arranged above the lens unit 51 so as to be rotatable around a shaft 53. The elevation angle adjustment of the lens and the mirror is performed by adjusting the position of the lens unit 51. With the fixed position, the mirror 52 is rotated in the direction of the arrow. However, in order to project an image on the screen in an appropriate image formation state and size, it is necessary to maintain a certain distance between the lens and the projection target. Placing a mirror on top of the lens hinders the mirror from observing the projected image on the screen.
【０００４】 その点、アンダーミラー方式オーバーヘッドプロジェクタは、ミラーによって 透過光の光軸の向きを変えた後に透過光を投影レンズに入射させるので、ミラー の高さを抑えて、スクリーン上の投影像観察を邪魔しないようにすることができ る。 図１１は、アンダーミラー方式オーバーヘッドプロジェクタの仰角調整機構の 一従来例を示す部分斜視図、図１２(a) 及び(b) は、図１１の従来例における仰 角調整状態を示す側面図である。 ミラーカバー６１には、ミラー用仰角調整部材６２が固着されており、ミラー 仰角調整部材６２には、ミラー用仰角調整軸６２ａが外側へ向けて突設せしめら れている。ミラー用仰角調整部材６２の外側には、投影レンズを取り付けるべく 形成されたレンズ取付け部６３が配設されている。レンズ取付け部６３には、ミ ラー用仰角調整軸６２ａとの接触を回避しうるように溝６３ａが形成されている と共に、レンズ用仰角調整軸６３ｂが外側へ向けて突設せしめられている。レン ズ取付け部６３の外側には、軸６４ａ，６４ｂを外側へ向けて突設せしめたベー ス板６４が配設されている。また、ミラー用仰角調整部材６２，レンズ取付け部 ６３及びベース板６４は、回転中心点Ｏにおいて同軸に軸着されており、更に、 ベース板６４の外側には、仰角調整部材６５が設けられている。On the other hand, in the under-mirror type overhead projector, since the transmitted light is incident on the projection lens after the direction of the optical axis of the transmitted light is changed by the mirror, the height of the mirror is suppressed and the projected image on the screen is observed. Can be kept out of the way. FIG. 11 is a partial perspective view showing one conventional example of an elevation angle adjusting mechanism of an under mirror type overhead projector, and FIGS. 12 (a) and 12 (b) are side views showing an elevation angle adjusting state in the conventional example of FIG. . A mirror elevation angle adjusting member 62 is fixed to the mirror cover 61, and a mirror elevation angle adjusting shaft 62a is provided on the mirror elevation adjusting member 62 so as to project outward. A lens mounting portion 63 formed to mount a projection lens is provided outside the mirror elevation angle adjusting member 62. A groove 63a is formed in the lens mounting portion 63 so as to avoid contact with the mirror elevation angle adjusting shaft 62a, and a lens elevation angle adjusting shaft 63b is provided so as to project outward. A base plate 64 having shafts 64a and 64b protruding outward is disposed on the outside of the lens mounting portion 63. Further, the mirror elevation angle adjusting member 62, the lens mounting portion 63, and the base plate 64 are coaxially mounted at the rotation center point O, and the elevation angle adjusting member 65 is provided outside the base plate 64. There is.
【０００５】 仰角調整部材６５には、長溝６５ａ，６５ｂが互いに平行に形成され、軸６４ ａ，６４ｂを長手方向に案内可能となっていると共に、長溝６５ｃ，６５ｄがそ の長手方向を長溝６５ａ，６５ｂの長手方向に対し所定の角度を付けて形成され 、ミラーとレンズの回転角度比が１対２となるようにミラー用仰角調整軸６２ａ 及びレンズ用仰角調整軸６３ｂを案内可能になっており、長溝６５ａ，６５ｂ， ６５ｃ，６５ｄには、それぞれ軸６４ａ，６４ｂ，ミラー用仰角調整軸６２ａ， 及びレンズ用仰角調整軸６３ｂが遊嵌せしめられている。また、仰角調整部材６ ５の一端部には、長溝６５ａ，６５ｂの長手方向に対し略垂直方向に案内可能な 案内溝６５ｅが形成されている。 更に、仰角調整部材６５の外側には、仰角調整カム６６が、先端部に軸６６ａ を備えて、該軸６６ａを案内溝６５ｅに遊嵌せしめていると共に、他端部に軸部 ６６ｂを備えて、該軸部６６ｂの位置でベース板６４に軸着されている。また、 軸部６６ｂは、その先端部に調整撮み（図示省略）を取り付けて所望の方向に回 動することができるようになっている。In the elevation angle adjusting member 65, long grooves 65a and 65b are formed in parallel with each other so that the shafts 64a and 64b can be guided in the longitudinal direction, and the long grooves 65c and 65d extend in the longitudinal direction of the long groove 65a. , 65b are formed at a predetermined angle with respect to the longitudinal direction, and the elevation angle adjusting shaft for mirror 62a and the elevation angle adjusting shaft for lens 63b can be guided so that the rotation angle ratio of the mirror and the lens is 1: 2. The shafts 64a and 64b, the mirror elevation angle adjusting shaft 62a, and the lens elevation angle adjusting shaft 63b are loosely fitted in the long grooves 65a, 65b, 65c, and 65d, respectively. In addition, a guide groove 65e is formed at one end of the elevation angle adjusting member 65 so that it can be guided in a direction substantially perpendicular to the longitudinal directions of the long grooves 65a and 65b. Further, on the outside of the elevation angle adjusting member 65, an elevation angle adjusting cam 66 is provided with a shaft 66a at its tip, and the shaft 66a is loosely fitted in the guide groove 65e, and at the other end thereof is provided with a shaft 66b. And is axially attached to the base plate 64 at the position of the shaft portion 66b. In addition, the shaft portion 66b can be rotated in a desired direction by attaching an adjustment photograph (not shown) to the tip portion thereof.
【０００６】 上記調整機構によれば、図１２(a) において調整撮み（図示省略）を軸部６６ ｂに取り付けて時計方向に回動すると、図１２(b) に示す如く、軸６６ａが案内 溝６５ｅをその長手方向に沿って案内せしめられると共に案内溝６５ｅの側部を 押圧して仰角調整部材６５を軸６４ａ，６４ｂを介して長溝６５ａ，６５ｂの長 手方向に沿って移動せしめる。このとき、レンズ用仰角調整軸６３ｂ，ミラー用 仰角調整軸６２ａが長溝６５ｃ，６５ｄ内をそれぞれ長溝６５ｃ，６５ｄの長手 方向に沿って案内せしめられ、ミラーカバー６１及びレンズ取付け部６３は、回 転中心点Ｏを軸として、１：２の回転角度比でそれぞれ矢印Ａ，Ｂ方向へ回動せ しめられる。そして、所望の仰角に調整した後に調整撮みを取り外せば仰角が固 定される。なお、調整撮みを反時計方向に回動すれば、ミラーカバー６１及びレ ンズ取付け部６３は、回転中心点Ｏを軸として、１：２の回転角度比で上記とは 逆方向へそれぞれ回動せしめられる。According to the adjusting mechanism described above, when an adjustment photograph (not shown) is attached to the shaft portion 66b and rotated clockwise in FIG. 12 (a), the shaft 66a is rotated as shown in FIG. 12 (b). The guide groove 65e is guided along the longitudinal direction thereof, and the side portions of the guide groove 65e are pressed to move the elevation angle adjusting member 65 along the longitudinal direction of the long grooves 65a, 65b via the shafts 64a, 64b. At this time, the lens elevation angle adjusting shaft 63b and the mirror elevation angle adjusting shaft 62a are guided in the long grooves 65c and 65d along the longitudinal direction of the long grooves 65c and 65d, respectively, and the mirror cover 61 and the lens mounting portion 63 rotate. With the center point O as an axis, they are rotated in the directions of arrows A and B at a rotation angle ratio of 1: 2, respectively. Then, the elevation angle is fixed by removing the adjusted photograph after adjusting to the desired elevation angle. If the adjusted photograph is rotated counterclockwise, the mirror cover 61 and the lens mounting portion 63 rotate in the opposite directions to each other at a rotation angle ratio of 1: 2 about the rotation center point O as an axis. Can be moved.
【０００７】 このように、従来の仰角調整機構は、ミラーカバー及びレンズ取付け部を同軸 に取付けた状態で、ミラーカバー及びレンズ取付け部の端部にそれぞれ調整軸を 設けると共に、所定方向へ移動させることによりミラーカバー及びレンズ取付け 部の回転角が１：２となりうるように上記調整軸を案内する溝を形成すると共に 該移動が所定方向に規制されるように規制手段を備えた仰角調整部材と、回動に より仰角調整部材を所定方向に押動する仰角調整カムを設け、仰角調整カムの回 動により、レンズとミラーの仰角が調整されるようになっている。As described above, in the conventional elevation angle adjusting mechanism, with the mirror cover and the lens attaching portion coaxially attached, the adjusting shafts are provided at the end portions of the mirror cover and the lens attaching portion, and are moved in the predetermined direction. As a result, a groove for guiding the adjusting shaft is formed so that the rotation angle of the mirror cover and the lens mounting portion can be 1: 2, and an elevation angle adjusting member provided with a restricting means for restricting the movement in a predetermined direction. An elevation angle adjusting cam that pushes the elevation angle adjusting member in a predetermined direction by rotation is provided, and the elevation angle of the lens and the mirror is adjusted by rotating the elevation angle adjusting cam.
【０００８】[0008]
しかし、上記の如き仰角調整機構は、レンズ及びミラーの仰角調整は調整撮み 等を介した仰角調整カムの回動に伴う仰角調整部材の所定方向の移動に依存し、 しかも、移動方向は、支柱を折り畳んで、ミラー及びレンズ部がステージに接触 したときにミラー及びレンズ部に加えられる力の方向とは異なるので、支柱を折 り畳んで、ミラー及びレンズ部がステージに対し隙間を作った状態で接触した場 合、更に、折畳み方向に力を加えても、レンズ及びミラーの仰角は変わらず、そ の分、収納スペースが余計に必要となる。また、ヘッド部がステージに対し、当 接箇所に負荷が集中した状態のまま収納されることになり、製品寿命が劣化する 。 従って、ヘッド部の収納に際し、ミラー及びレンズ部がステージに対し接触面 積が大きく隙間を極力無くすことができるような角度にミラー及びレンズの仰角 を再調整しなければならず、支柱収納時の操作が煩雑化していた。 However, in the elevation angle adjustment mechanism as described above, the elevation angle adjustment of the lens and the mirror depends on the movement of the elevation angle adjustment member in the predetermined direction accompanying the rotation of the elevation angle adjustment cam through the adjustment photographing, and the movement direction is Since the direction of the force applied to the mirror and lens when the pillar and the lens are in contact with the stage is different, the pillar is folded and the mirror and lens form a gap with respect to the stage. When they contact each other, the elevation angle of the lens and mirror does not change even if a force is applied in the folding direction, and an extra storage space is required accordingly. In addition, the head part is housed with the load concentrated on the contact part with respect to the stage, which shortens the product life. Therefore, when the head is stored, the elevation angles of the mirror and lens must be readjusted to an angle that allows the mirror and lens to have a large contact area with the stage and to eliminate the gap as much as possible. The operation was complicated.
【０００９】 また、オーバーヘッドプロジェクタには、収納スペースを考慮して、支柱折畳 み機構を備え、保管及び使用に際し、支柱を折畳み及び展開可能になっているも のが多いが、折畳み機構つきのオーバーヘッドプロジェクタは、折畳んだ状態で 係止する係止手段等を備えると共に、ばね等の弾性部材により、支柱が展開方向 に付勢せしめられており、且つ、所定の跳ね上げ位置でヘッド部等の重量とが釣 り合うようになっているので、オーバーヘッドプロジェクタ全体を横にしたとき 等、弾性部材の跳ね上げ力がヘッド部の重量と釣り合いが取れないときに、支柱 が勢い良く跳ね上がる等の危険性があった。 他方、支柱の展開方向にばね等の弾性部材を設けないと、係止手段を解除した ときに、支柱が急激に折り畳まれて手を挟んだり、勢い良くヘッド部がステージ に衝突して破損したりする等の危険性がある。 従って、従来の支柱折畳み機構を備えたオーバーヘッドプロジェクタでは、支 柱の折畳みの際に、支柱から手を離すことが出来ず、その状態で上記仰角の再調 整をしなければならないので、支柱の収納操作が一層煩雑化してしまっていた。Further, in consideration of the storage space, the overhead projector is often provided with a strut folding mechanism so that the strut can be folded and unfolded at the time of storage and use. However, the overhead projector with the folding mechanism is provided. The projector is equipped with locking means that locks it in the folded state, and the elastic member such as a spring urges the support column in the deployment direction. Since the weight is balanced with that of the overhead projector, when the entire overhead projector is laid sideways and the spring force of the elastic member is out of balance with the weight of the head part, there is a danger of the brace jumping up vigorously. There was a nature. On the other hand, if an elastic member such as a spring is not provided in the deploying direction of the column, the column will be suddenly folded and your hand will be caught when the locking means is released, or the head part will violently collide with the stage and be damaged. There is a risk of damage. Therefore, in an overhead projector equipped with a conventional strut-folding mechanism, when the support pillar is folded, it is not possible to remove the hand from the strut, and the elevation angle must be readjusted in that state. The storage operation became more complicated.
【００１０】 そこで、本考案は、上記問題点に鑑みて、操作が簡単、且つ安全で、支柱をコ ンパクトに収納可能なアンダーミラー方式オーバーヘッドプロジェクタの仰角調 整機構を提供することを目的とする。In view of the above problems, it is an object of the present invention to provide an elevation angle adjusting mechanism for an under-mirror type overhead projector that is easy and safe to operate, and that can support a prop in a compact manner. .
【００１１】[0011]
上記目的を達成するため、本考案によるアンダーミラー方式オーバーヘッドプ ロジェクタにおけるレンズとミラーの仰角調整機構は、ミラー部と投影レンズ部 とを同軸に軸着して備えたヘッド部と、前記ヘッド部を支持する支柱と、支柱折 畳み機構を備えたアンダーミラー方式オーバーヘッドプロジェクタにおいて、前 記ミラー部と前記投影レンズ部にそれぞれ設けられた調整軸を遊嵌せしめると共 に、螺子を遊嵌せしめ且つ螺子の撮みを支持しうるように形成された支持金具と 、前記それぞれの調整軸を連結すると共に螺子に螺合可能となるように形成され た連結部材と、前記支持金具及び前記連結部材を貫通する撮み付き螺子とを、前 記螺子の回動及び上下動により、前記ミラー部及び前記投影レンズ部が所定の比 率で回動されるように備えたことを特徴とするものである。 In order to achieve the above-mentioned object, the lens and mirror elevation angle adjusting mechanism in the under-mirror type overhead projector according to the present invention comprises a head part provided with a mirror part and a projection lens part coaxially mounted, and the head part. In an under-mirror type overhead projector equipped with a supporting column and a column folding mechanism, the adjustment shafts provided in the mirror section and the projection lens section are loosely fitted, and at the same time, the screw is loosely fitted and screwed. A support member formed so as to support the capture of the image, a connecting member formed so as to connect the respective adjustment shafts and be screwed into a screw, and the supporting member and the connecting member The mirrored portion and the projection lens portion are rotated at a predetermined ratio by rotating the screw and the vertical movement of the above-mentioned screw. It is characterized in that it comprises the cormorants.
【００１２】 本考案によるアンダーミラー方式オーバーヘッドプロジェクタにおけるレンズ とミラーの仰角調整機構は、好ましくは、ミラー部と投影レンズ部とを同軸に軸 着して備えたヘッド部と、前記ヘッド部を支持する支柱と、支柱折畳み機構を備 えたアンダーミラー方式オーバーヘッドプロジェクタにおいて、前記ミラー部と 前記投影レンズ部の前記軸から異なる半径の部位にそれぞれ設けられた調整軸を 遊嵌せしめると共に、前記軸を中心とする円の接線に平行に螺子を遊嵌せしめ且 つ螺子の撮みを支持しうるように形成された支持金具と、前記それぞれの調整軸 を連結すると共に前記支持金具に遊嵌せしめられる螺子に螺合可能となるように 形成された連結部材と、前記支持金具及び前記連結部材を貫通する撮み付き螺子 とを備え、前記螺子を回動したとき、前記連結部材が前記螺子との相対的位置を 変えながら移動せしめられ、前記螺子を押し上げたとき、前記連結部材が前記螺 子との相対的位置を維持しながら移動せしめられて、前記ミラー部及び前記投影 レンズ部が所定の比率で回動されるようにしたことを特徴とするものである。The elevation angle adjusting mechanism of the lens and the mirror in the under mirror type overhead projector according to the present invention preferably supports a head portion provided with a mirror portion and a projection lens portion coaxially mounted, and the head portion. In an under-mirror type overhead projector equipped with a strut and a strut folding mechanism, an adjusting shaft provided on each of the mirror portion and the projection lens portion at a different radius from the axis is loosely fitted, and the axis is centered on the adjustment axis. To a screw that is loosely fitted in parallel to the tangent of the circle and that is formed so as to support the captured image of the screw, and to which each of the adjustment shafts are connected and that is loosely fitted to the support. A connecting member formed so as to be screwed, and a screw with a photograph that penetrates through the support fitting and the connecting member. When the screw is rotated, the connecting member is moved while changing the relative position with respect to the screw, and when the screw is pushed up, the connecting member maintains the relative position with respect to the screw. While being moved, the mirror portion and the projection lens portion are rotated at a predetermined ratio.
【００１３】 また、本考案によるアンダーミラー方式オーバーヘッドプロジェクタにおける レンズとミラーの仰角調整機構は、好ましくは、ミラー部と投影レンズ部とを同 軸に軸着して備えたヘッド部と、前記ヘッド部を支持する支柱と、支柱折畳み機 構を備えたアンダーミラー方式オーバーヘッドプロジェクタにおいて、前記ミラ ー部と前記投影レンズ部の前記軸から異なる半径の部位にそれぞれ設けられた調 整軸を遊嵌せしめる溝と、前記軸を中心とする円の接線に平行に螺子を遊嵌せし める貫通穴が設けられ、且つ、上部で螺子の撮みを支持しうる一対の折曲げ部と が形成された支持金具と、前記それぞれの調整軸を連結する穴と、前記支持金具 に遊嵌せしめられる螺子に螺合可能となるように螺子溝とが形成され、前記支持 金具の折曲げ部の間に配置された連結部材と、前記支持金具及び前記連結部材を 貫通する撮み付き螺子とからなる仰角調整部材を前記ヘッド部に備え、前記螺子 を回動したとき、前記連結部材が前記螺子との相対的位置を変えながら移動せし められ、前記螺子を押し上げたとき、前記連結部材が前記螺子との相対的位置を 維持しながら移動せしめられて、前記ミラー部及び前記投影レンズ部が所定の比 率で回動されるようにしたことを特徴とするものである。Further, the lens and mirror elevation angle adjusting mechanism in the under mirror type overhead projector according to the present invention is preferably a head unit provided with a mirror unit and a projection lens unit coaxially attached to each other, and the head unit. In an under-mirror type overhead projector equipped with a supporting column and a supporting-folding mechanism, a groove for loosely fitting an adjusting shaft provided in each of the mirror part and the projection lens part at a different radius from the axis. And a through hole in which a screw is loosely fitted is provided in parallel with a tangent line of a circle centered on the axis, and a pair of bent portions capable of supporting a captured image of the screw are formed in an upper portion. A support metal fitting, a hole for connecting each of the adjustment shafts, and a screw groove that can be screwed into a screw loosely fitted to the support metal fitting are formed. The head portion is provided with an elevation angle adjusting member including a connecting member arranged between the bent portions of the tool, and a captured screw penetrating the supporting metal fitting and the connecting member, and when the screw is rotated, The connecting member is moved while changing the relative position with respect to the screw, and when the screw is pushed up, the connecting member is moved while maintaining the relative position with the screw, so that the mirror portion is moved. And the projection lens unit is rotated at a predetermined ratio.
【００１４】 また、本考案によるアンダーミラー方式オーバーヘッドプロジェクタにおける レンズとミラーの仰角調整機構は、好ましくは、ミラー部と投影レンズ部とを同 軸に軸着して備えたヘッド部と、前記ヘッド部を支持する支柱と、支柱折畳み機 構を備えたアンダーミラー方式オーバーヘッドプロジェクタにおいて、前記支柱 折り畳み機構にダンパーを備えると共に、前記ヘッド部には、前記ミラー部と前 記投影レンズ部の前記軸から異なる半径の部位にそれぞれ設けられた調整軸を遊 嵌せしめる溝と、前記軸を中心とする円の接線に平行に螺子を遊嵌せしめる貫通 穴が設けられ、且つ、上部で螺子の撮みを支持しうる一対の折曲げ部とが形成さ れた支持金具と、前記それぞれの調整軸を連結する穴と、前記支持金具に遊嵌せ しめられる螺子に螺合可能となるように螺子溝とが形成され、前記支持金具の折 曲げ部の間に配置された連結部材と、前記支持金具及び前記連結部材を貫通する 撮み付き螺子とからなる仰角調整部材とを備え、前記螺子を回動したとき、前記 連結部材が前記螺子との相対的位置を変えながら移動せしめられ、前記支柱の折 曲げ時には、前記ヘッド部がステージ部に対し徐々に当接方向に力が加えられ、 前記螺子が徐々に押し上げられると共に前記連結部材が前記螺子との相対的位置 を維持しながら徐々に移動せしめられて、前記ミラー部及び前記投影レンズ部が 所定の比率で回動されるようにしたことを特徴とするものである。Further, the lens and mirror elevation angle adjusting mechanism in the under-mirror type overhead projector according to the present invention is preferably a head unit provided with a mirror unit and a projection lens unit coaxially mounted, and the head unit. In an under-mirror type overhead projector equipped with a supporting column and a supporting-folding mechanism, a damper is provided in the supporting-folding mechanism, and the head part is different from the axis of the mirror part and the projection lens part. Grooves are provided in the radial areas to fit the adjusting shafts, and through holes are provided to allow the screws to fit in parallel to the tangent to the circle centered on the shafts. A pair of bendable parts, a hole for connecting the adjusting shafts, and a loose fitting to the supporting metal. A screw groove formed so as to be screwed into a screw to be inserted, the connecting member disposed between the bent portions of the support fitting, and a screw with a pierce through the support fitting and the connecting member. When the screw is rotated, the connecting member is moved while changing the relative position with respect to the screw, and when the pillar is bent, the head part is moved with respect to the stage part. A force is gradually applied in the contact direction, the screw is gradually pushed up, and the connecting member is gradually moved while maintaining the relative position with the screw, so that the mirror unit and the projection lens unit are moved. It is characterized in that it is rotated at a predetermined ratio.
【００１５】 また、本考案によるアンダーミラー方式オーバーヘッドプロジェクタにおける レンズとミラーの仰角調整機構は、好ましくは、ミラー部と投影レンズ部とを同 軸に軸着して備えたヘッド部と、前記ヘッド部を支持する支柱と、支柱折畳み機 構を備えたアンダーミラー方式オーバーヘッドプロジェクタにおいて、前記支柱 折り畳み機構にダンパーを備えると共に、前記ヘッド部には、前記ミラー部と前 記投影レンズ部の前記軸から異なる半径の部位にそれぞれ設けられた調整軸を遊 嵌せしめる溝と、前記軸を中心とする円の接線に平行に螺子を遊嵌せしめる貫通 穴が設けられ、且つ、上部で螺子の撮みを支持しうる一対の折曲げ部とが形成さ れた支持金具と、前記それぞれの調整軸を連結する穴と、前記支持金具に遊嵌せ しめられる螺子に螺合可能となるように螺子溝とが形成され、前記支持金具の折 曲げ部の間に配置された連結部材と、前記支持金具及び前記連結部材を貫通する 撮み付き螺子とからなる仰角調整部材とを備え、前記螺子を回動したとき、前記 連結部材が前記螺子との相対的位置を変えながら移動せしめられ、前記支柱の折 曲げ時には、前記ヘッド部がステージ部に対し徐々に当接方向に力が加えられ、 前記螺子が徐々に押し上げられると共に前記連結部材が前記螺子との相対的位置 を維持しながら徐々に移動せしめられて、前記ミラー部及び前記投影レンズ部が 所定の比率で回動されるようにし、更に、前記ミラー部及び前記投影レンズ部が 前記ステージ部の輪郭に沿うように密着したときの角度が仰角の調整可能な最大 角となるようにしたことを特徴とするものである。Further, the lens and mirror elevation angle adjusting mechanism in the under-mirror type overhead projector according to the present invention is preferably a head part provided with a mirror part and a projection lens part coaxially mounted, and the head part. In an under-mirror type overhead projector equipped with a supporting column and a supporting-folding mechanism, a damper is provided in the supporting-folding mechanism, and the head part is different from the axis of the mirror part and the projection lens part. Grooves are provided in the radial areas to fit the adjusting shafts, and through holes are provided to allow the screws to fit in parallel to the tangent to the circle centered on the shafts. A pair of bendable parts, a hole for connecting the adjusting shafts, and a loose fitting to the supporting metal. A screw groove formed so as to be screwed into a screw to be inserted, the connecting member disposed between the bent portions of the support fitting, and a screw with a pierce through the support fitting and the connecting member. When the screw is rotated, the connecting member is moved while changing the relative position with respect to the screw, and when the pillar is bent, the head part is moved with respect to the stage part. A force is gradually applied in the contact direction, the screw is gradually pushed up, and the connecting member is gradually moved while maintaining the relative position with the screw, so that the mirror unit and the projection lens unit are moved. It is rotated at a predetermined ratio, and the angle when the mirror part and the projection lens part are in close contact with each other along the contour of the stage part is the maximum adjustable angle of elevation. It is characterized in that the.
【００１６】[0016]
以下、本考案の実施形態につき具体的に図示説明する。 図１は、本考案によるアンダーミラー方式オーバーヘッドプロジェクタの仰角 調整機構の一実施形態を示す側面図、図２は、本実施形態におけるミラー部を示 す図であり、(a) は側面図、(b) は部分斜視図、図３は、本実施形態におけるレ ンズ取付け部を示す図であり、(a) はミラー部にレンズ取付け部を取り付けた状 態を示す側面図、(b) はレンズ取付け部の斜視図、図４は、本実施形態における ベース板及び仰角調整部材を示す図であり、(a) は図３(a) においてベース板を 取り付けた状態を示す側面図、(b) はベース板の斜視図、(c) は仰角調整部材の 分解斜視図、図５は、本実施形態の仰角の調整状態を示す図であり、(a) は仰角 調整部材の側面図、(b) はレンズ取付け部とミラー部の回転角度を示す図、図６ 及び図７は、本実施形態による仰角の調整状態を示す側面図である。 図１に示す如く、アンダーミラー方式オーバーヘッドプロジェクタのヘッド部 １は、ベース板２にミラー部３，レンズ取付け部６及び仰角調整部材９を備えて いる。 ミラー部３は、図２(a) 及び図２(b) に示す如く、ミラーを内設したミラーカ バー４の一側部にミラー用仰角調整部材５を螺着してなり、ミラー用仰角調整部 材５には、軸穴５ａが形成されると共に、ミラー用仰角調整軸５ｂが外側へ向け て突設せしめられている。 Hereinafter, embodiments of the present invention will be specifically illustrated and described. FIG. 1 is a side view showing an embodiment of an elevation angle adjusting mechanism of an under mirror type overhead projector according to the present invention, FIG. 2 is a view showing a mirror portion in this embodiment, (a) is a side view, FIG. 3B is a partial perspective view, FIG. 3 is a view showing a lens mounting portion in the present embodiment, FIG. 3A is a side view showing a lens mounting portion attached to a mirror portion, and FIG. 4 is a perspective view of the mounting portion, FIG. 4 is a view showing a base plate and an elevation angle adjusting member in the present embodiment, (a) is a side view showing a state where the base plate is mounted in FIG. 3 (a), and (b). Is a perspective view of the base plate, (c) is an exploded perspective view of the elevation angle adjusting member, FIG. 5 is a view showing an elevation angle adjusting state of the present embodiment, (a) is a side view of the elevation angle adjusting member, and (b) is a side view of the elevation angle adjusting member. ) Is a diagram showing the rotation angles of the lens mounting portion and the mirror portion, and FIGS. 6 and 7 show the present embodiment. It is a side view which shows the adjustment state of an elevation angle. As shown in FIG. 1, a head unit 1 of an under-mirror type overhead projector includes a base plate 2, a mirror unit 3, a lens mounting unit 6 and an elevation angle adjusting member 9. As shown in FIGS. 2 (a) and 2 (b), the mirror section 3 is formed by screwing a mirror elevation angle adjusting member 5 to one side of a mirror cover 4 in which a mirror is installed. A shaft hole 5a is formed in the member 5, and a mirror elevation angle adjusting shaft 5b is provided so as to project outward.
【００１７】 また、ミラー部３の外側には、図３(a) に示す如く、レンズ取付け部６が設け られており、レンズ取付け部６は、図３(b) に示す如く、略箱形状のレンズ取付 用金具７の内側に投影レンズを設けると共に、その側端部７ａにレンズ用仰角調 整部材８を螺着してなる。 レンズ用仰角調整部材８には、軸穴８ａが形成されると共に、レンズ用仰角調 整軸８ｂが外側へ向けて突設せしめられており、レンズ用仰角調整軸８ｂは、軸 穴８ａの中心からの距離が、軸穴５ａの中心からミラー用仰角調整軸５ｂまでの 距離に対し１：２となるような位置に設けられている。 また、レンズ用仰角調整部材８には、窓８ｃが形成されており、窓８ｃは、ミ ラー用仰角調整軸５ｂを遊嵌し、且つ、ミラー部３が軸穴５ａを中心として所定 量回動しうるようになっている。また、レンズ取付け部６は、図３(a) に示す如 く、軸穴８ａをミラー部３の軸穴５ａと同軸に配置されている。As shown in FIG. 3A, a lens mounting portion 6 is provided outside the mirror portion 3, and the lens mounting portion 6 has a substantially box shape as shown in FIG. 3B. The projection lens is provided inside the lens mounting bracket 7, and the lens elevation angle adjusting member 8 is screwed to the side end portion 7a. The lens elevation angle adjusting member 8 is formed with a shaft hole 8a, and a lens elevation angle adjusting shaft 8b is provided so as to project outward, and the lens elevation angle adjusting shaft 8b is located at the center of the shaft hole 8a. From the center of the shaft hole 5a to the mirror elevation angle adjusting shaft 5b is 1: 2. A window 8c is formed in the lens elevation angle adjusting member 8, the mirror elevation angle adjusting shaft 5b is loosely fitted in the window 8c, and the mirror portion 3 rotates a predetermined amount around the axis hole 5a. It is able to move. As shown in FIG. 3A, the lens mounting portion 6 has a shaft hole 8a arranged coaxially with the shaft hole 5a of the mirror portion 3.
【００１８】 更に、レンズ取付け部６の外側には、図４(a) に示す如く、ベース板２が設け られており、ベース板２には、図４(b) に示す如く、軸穴５ａ，８ａを通る軸２ ａが設けられると共に、レンズ用仰角調整軸８ｂ，及びミラー用仰角調整軸５ｂ を略平行に移動可能となるように逃げ穴２ｂ，２ｃがそれぞれ形成され、逃げ穴 ２ｂ，２ｃは、図４(a) に示す如く、レンズ用仰角調整軸８ｂ，ミラー用仰角調 整軸５ｂをそれぞれ遊嵌せしめている。 なお、ベース２板は、プロジェクター本体の折畳み機構を備えた支柱に固着さ れている（図示省略）。Further, as shown in FIG. 4 (a), a base plate 2 is provided outside the lens mounting portion 6, and the base plate 2 has a shaft hole 5 a as shown in FIG. 4 (b). , 8a are provided, and escape holes 2b, 2c are formed so that the lens elevation angle adjusting axis 8b and the mirror elevation angle adjusting axis 5b can be moved substantially parallel to each other. As shown in FIG. 4A, the lens 2c has a lens elevation angle adjusting shaft 8b and a mirror elevation angle adjusting shaft 5b loosely fitted therein. In addition, the base 2 plate is fixed to a column having a folding mechanism of the projector body (not shown).
【００１９】 更に、ベース板２の外側には、仰角調整部材９が取り付けられており、仰角調 整部材９は、図４(c) に示す如く、仰角調整用螺子受部材１０と、仰角調整軸連 結部材１１と、仰角調整撮み１２とから構成されている。Further, an elevation angle adjusting member 9 is attached to the outside of the base plate 2, and the elevation angle adjusting member 9 includes an elevation angle adjusting screw receiving member 10 and an elevation angle adjusting member as shown in FIG. 4 (c). It is composed of a shaft connecting member 11 and an elevation angle adjusting photograph 12.
【００２０】 仰角調整用螺子受け部材１０には、べース板２等と同軸に軸着される軸穴１０ ａが形成されると共に、ベース板２に設けられた逃げ穴２ｂ，２ｃと同様に逃げ 穴１０ｂ，１０ｃが形成されており、逃げ穴１０ｂ，１０ｃは、レンズ用仰角調 整軸８ｂ及びミラー用仰角調整軸５ｂをそれぞれ遊嵌せしめている。 また、仰角調整用螺子受け部材１０には、逃げ穴１０ｂ，１０ｃが形成された 面を上下に挟んで垂直に折り曲げられた一対の折曲部１０ｄが形成され、折曲部 １０ｄには、貫通穴１０ｅが後述の螺子を遊嵌しうる程度の大きさに形成されて おり、軸穴１０ａを中心とする円の接線に平行に螺子を遊嵌せしめ、且つ、上部 が螺子の撮み部と当接するようになっている。 また、仰角調整用螺子受け部材１０には、軸穴１０ａとは反対側に孔１０ｆが 形成されており、同様の位置に設けられた孔２ｅを介してベース板２に螺着され ている。The elevation adjusting screw receiving member 10 is formed with a shaft hole 10 a coaxially mounted on the base plate 2 and the like, and is similar to the escape holes 2 b and 2 c provided in the base plate 2. Relief holes 10b and 10c are formed in the recesses. The relief holes 10b and 10c are loosely fitted with the lens elevation angle adjusting shaft 8b and the mirror elevation angle adjusting shaft 5b, respectively. Further, the elevation angle adjusting screw receiving member 10 is formed with a pair of bent portions 10d which are vertically bent with the surfaces on which the escape holes 10b and 10c are formed vertically sandwiched, and the bent portion 10d penetrates through the bent portion 10d. The hole 10e is formed in such a size that a screw described later can be loosely fitted therein, and the screw is loosely fitted in parallel with the tangent of a circle centered on the shaft hole 10a, and the upper part is a photographing part of the screw. It comes to abut. A hole 10f is formed in the elevation angle adjusting screw receiving member 10 on the side opposite to the shaft hole 10a, and is screwed to the base plate 2 through a hole 2e provided at the same position.
【００２１】 仰角調整用連結部材１１は、仰角調整用螺子受け部材１０に形成された折曲部 １０ｄの間に配置されている。仰角調整軸連結部材１１には、レンズ用仰角調整 軸８ｂ及びミラー用仰角調整軸５ｂが挿通可能な穴１１ａ及び１１ｂが形成され ており、それぞれの軸を挿通せしめることにより、レンズ取付け部６とミラー部 ３とを連結するようになっている。また、仰角調整軸連結部材１１には、穴１１ ａ及び１１ｂの挿通方向に対し垂直であって、折曲部１０ｄに形成された貫通穴 １０ｅを結ぶ線分上に、螺子溝１１ｃが設けられており、仰角調整用螺子受け部 材１０に遊嵌せしめられる螺子に螺合可能となっている。The elevation angle adjusting connecting member 11 is arranged between the bent portions 10 d formed in the elevation angle adjusting screw receiving member 10. The elevation angle adjusting shaft connecting member 11 is formed with holes 11a and 11b into which the lens elevation angle adjusting shaft 8b and the mirror elevation angle adjusting shaft 5b can be inserted. It is designed to connect with the mirror section 3. Further, the elevation angle adjusting shaft connecting member 11 is provided with a screw groove 11c on a line segment which is perpendicular to the insertion direction of the holes 11a and 11b and which connects the through holes 10e formed in the bent portion 10d. Therefore, it can be screwed into a screw that is loosely fitted in the elevation angle screw receiving member 10.
【００２２】 仰角調整撮み１２は、螺子部１２ａに撮み部１２ｂを備えてなり、螺子部１２ ａは、仰角調整軸連結部材１１に設けられた螺子穴１１ｃに螺合し、且つ、仰角 調整用螺子受け部材１０に形成された一対の貫通穴１０ｅに遊嵌可能となるよう に形成されている。また、撮み部１２ｂの底部１２ｂ’は、上方に位置する折曲 部１０ｄと当接可能であり、当接することにより仰角調整撮み１２が、折曲部１ ０に支持されるようになっている。The elevation adjustment photographing device 12 is provided with a photographing portion 12b on a screw portion 12a, and the screw portion 12a is screwed into a screw hole 11c provided in the elevation angle adjusting shaft connecting member 11 and also has an elevation angle. The adjusting screw receiving member 10 is formed so that it can be loosely fitted in a pair of through holes 10e formed in the adjusting screw receiving member 10. Further, the bottom portion 12b 'of the photographing portion 12b can come into contact with the bending portion 10d located above, so that the elevation angle adjusting photographing portion 12 is supported by the bending portion 10 by contacting the bottom portion 12b'. ing.
【００２３】 また、仰角調整部材９は、撮み部１２ｂを回動することにより、仰角調整用連 結部材１１が逃げ穴１０ｂ，１０ｃの長手方向に沿って螺子１２ａに対し略平行 方向に移動せしめられ、レンズ用仰角調整軸８ｂ及びミラー用仰角調整軸５ｂを 軸穴８ａ，５ａを中心として回動せしめることができるようになっている。Further, the elevation angle adjusting member 9 moves the elevation angle adjusting connecting member 11 in a direction substantially parallel to the screw 12a along the longitudinal direction of the escape holes 10b and 10c by rotating the photographing portion 12b. The lens elevation angle adjusting shaft 8b and the mirror elevation angle adjusting shaft 5b can be rotated about the shaft holes 8a, 5a.
【００２４】 次に、本実施形態を用いたアンダーミラー方式オーバーヘッドプロジェクタの の仰角調整について説明する。 図５(a) 及び図６に示す如く、仰角調整撮み１２の撮み部１２ｂを所定方向に 回動すると、仰角調整用連結部材１１が螺子部１２ａ対し相対的位置を変えなが ら平行移動せしめられる。このとき、仰角調整撮み１２は、螺子部１２ａが、仰 角調整用螺子受け部材１０の折曲部１０ｃに設けられた貫通穴１０ｄを移動する 一方、撮み部１２ｂの底部１２ｂ’は、重力により上方の折曲部１０ｄと当接す る。Next, the elevation angle adjustment of the under-mirror type overhead projector using this embodiment will be described. As shown in FIGS. 5 (a) and 6, when the photographing part 12b of the elevation angle adjusting photograph 12 is rotated in a predetermined direction, the elevation angle adjusting connecting member 11 is parallel to the screw portion 12a while changing its relative position. Can be moved. At this time, in the elevation adjustment photographing 12, the screw portion 12a moves through the through hole 10d provided in the bent portion 10c of the elevation adjustment screw receiving member 10, while the bottom portion 12b ′ of the photographing portion 12b is It contacts the upper bent portion 10d due to gravity.
【００２５】 仰角調整用連結部材１１の移動に伴い、穴１１ａ，１１ｂに挿通せしめられた レンズ用仰角調整軸８ｂ及びミラー用仰角調整軸５ｂが共に等距離移動せしめら れる。このとき、レンズ用仰角調整軸８ｂ及びミラー用仰角調整軸５ｂは、それ ぞれ軸穴８ａ，５ａから１対２となるような位置に設けられており、各調整軸が 等距離移動せしめられた場合には、レンズ取付け部６とミラー部３の回転角度の 比は、２対１になるので、仰角調整撮み１２を回動すれば、投影レンズとミラー は、図５(b) に示す如く、回転角度比が２対１の割合で調整される。また、この とき、レンズ取付け部６及びミラー部３の重量が加わることによりレンズ用仰角 調整軸８ｂは下方へ、及びミラー用仰角調整軸５ｂは上方へ力が加えられるが、 投影レンズ部はミラーに比べて重量が大きいため、仰角調整用連結部材１１は下 方に力が加えられ、仰角調整撮み１２の撮み部の底部１２ｂ’は上部の折曲部１ ０ｄに対し一層強い力で当接せしめられるので、投影レンズとミラーの仰角は固 定される。Along with the movement of the elevation angle adjusting connecting member 11, the lens elevation angle adjusting shaft 8b and the mirror elevation angle adjusting shaft 5b, which are inserted through the holes 11a and 11b, are both moved an equal distance. At this time, the elevation angle adjusting shaft 8b for the lens and the elevation angle adjusting shaft 5b for the mirror are provided at positions such that they are one to two from the shaft holes 8a and 5a, respectively, and each adjustment shaft is moved by an equal distance. In that case, the ratio of the rotation angles of the lens mounting portion 6 and the mirror portion 3 is 2: 1, so if the elevation angle adjusting photograph 12 is rotated, the projection lens and the mirror will be as shown in FIG. As shown, the rotation angle ratio is adjusted at a ratio of 2: 1. At this time, due to the weight of the lens mounting portion 6 and the mirror portion 3, a force is exerted downward on the lens elevation angle adjusting shaft 8b and an upward force on the mirror elevation angle adjusting shaft 5b. Since the weight is heavier than that of, the force applied to the elevation adjustment connecting member 11 is downward, and the bottom 12b ′ of the shooting portion of the elevation adjustment shooting 12 is stronger than the bending portion 10d at the top. Since they are brought into contact with each other, the elevation angles of the projection lens and the mirror are fixed.
【００２６】 上述の如く、本実施形態の仰角調整機構によれば、仰角調整撮み１２の撮み部 １２ｂを所定方向に回動することによってレンズとミラーの仰角を調整でき、ま た、撮み部１２ｂの底部１２ｂ’が重力により上部の折曲部１０ｄと当接するこ とによってレンズとミラーの仰角が固定せしめられるが、折曲部１０ｄに設けら れた貫通穴１０ｅは、螺子部１２ａを移動可能に形成されているので、重力に抗 した方向の力を仰角調整撮み１２或いはレンズ取付け部６に加えれば、仰角調整 撮み１２の撮み部１２ｂを回動することなく、レンズとミラーの仰角を自在に調 整できる。As described above, according to the elevation angle adjusting mechanism of the present embodiment, the elevation angle of the lens and the mirror can be adjusted by rotating the photographing unit 12b of the elevation angle adjusting photographing unit 12 in a predetermined direction, and The bottom 12b 'of the groove 12b is brought into contact with the upper bent portion 10d by gravity, whereby the elevation angles of the lens and the mirror are fixed, and the through hole 10e formed in the bent portion 10d has the screw portion 12a. Since it is formed so as to be movable, if a force in the direction against gravity is applied to the elevation adjustment photographing unit 12 or the lens mounting portion 6, it is possible to rotate the photographing unit 12b of the elevation adjustment photographing unit 12 without rotating the lens. And the elevation angle of the mirror can be adjusted freely.
【００２７】 例えば、図７に示す如く、仰角調整撮み１２に対し、下から上へ力を加えると 、仰角調整部は、螺子部１２ａが折曲部１０ｄに設けられた貫通穴１０ｅを通っ て重力に抗して上に持ち上げられ、それと共に、螺子部１２ａに螺着された状態 の仰角調整用連結部材１１が螺子部１２ａとの相対的位置を維持したまま移動せ しめられ、更に、仰角調整用連結部材１１の移動に伴い、穴１１ａ，１１ｂを挿 通せしめられたレンズ用仰角調整軸８ｂ及びミラー用仰角調整軸５ｂが共に等距 離移動せしめられ、投影レンズとミラーは回転角度比が２対１の割合で回動せし められて、開放方向に仰角が調整される。従って、本実施形態の仰角調整機構を 用いれば、支柱（図示省略）を折曲げてヘッド部をステージ部１３に当接させた 後に、更に折曲げ方向に力を加えることにより、レンズ取付け部６とミラー部３ が回動せしめられてステージ部１３に密着させることができる。For example, as shown in FIG. 7, when a force is applied from the bottom to the top of the elevation adjustment photograph 12, the elevation adjustment portion causes the screw portion 12a to pass through the through hole 10e provided in the bent portion 10d. And is lifted up against gravity, and at the same time, the elevation angle adjusting connecting member 11 screwed to the screw portion 12a is moved while maintaining the relative position with the screw portion 12a. As the elevation angle adjusting connecting member 11 moves, both the lens elevation angle adjusting shaft 8b and the mirror elevation angle adjusting shaft 5b, which are inserted through the holes 11a and 11b, are moved equidistantly, and the projection lens and the mirror are rotated. The elevation is adjusted in the opening direction by rotating the ratio at a ratio of 2: 1. Therefore, if the elevation angle adjusting mechanism of the present embodiment is used, the lens mounting portion 6 can be formed by bending a column (not shown) and bringing the head portion into contact with the stage portion 13 and then further applying a force in the bending direction. Then, the mirror section 3 can be rotated and brought into close contact with the stage section 13.
【００２８】 また、例えば、レンズ取付け部６に対し、下から上へ力を加えると、レンズ用 仰角調整軸８ｂは上方へ力が加えられ、穴１１ａを挿通せしめられた仰角調整用 連結部材１１を上方に押圧する。これにより、ミラー用及びレンズ用の仰角調整 軸５ｂ，８ｂは上方へ力が加えられることになり、上記の場合と同様に投影レン ズとミラーは回転角度比が２対１の割合で開放方向に仰角が調整される。Further, for example, when a force is applied to the lens mounting portion 6 from the bottom to the top, a force is applied upward to the lens elevation angle adjusting shaft 8b, and the elevation angle adjusting connecting member 11 inserted through the hole 11a. Press upward. As a result, a force is applied upward to the elevation angle adjusting shafts 5b and 8b for the mirror and the lens, and the projection lens and the mirror have a rotation angle ratio of 2: 1 in the opening direction as in the above case. The elevation angle is adjusted to.
【００２９】 なお、ミラー部３に対し、下から上へ力を加えたときは、ミラー用仰角調整軸 ５ｂには下方へ力が加えられるが、仰角調整撮み１２の撮み部の底部５３ｂ’は 、重力により上方の折曲部１０ｄと当接し、また、仰角調整用連結部材１１は、 螺子部１２ａと螺合した状態で相対的位置が固定されているので、仰角調整用連 結部材１１及びミラー用仰角調整軸５ｂの下方への移動は制止される。When a force is applied to the mirror unit 3 from the bottom to the top, the force is applied downward to the mirror elevation angle adjusting shaft 5b, but the bottom portion 53b of the photographing unit of the elevation angle adjusting photograph 12 is used. 'Is brought into contact with the upper bent portion 10d due to gravity, and since the relative position of the elevation angle adjusting coupling member 11 is screwed with the screw portion 12a, the elevation angle adjusting coupling member 11 is fixed. The downward movement of 11 and the elevation angle adjusting shaft for mirror 5b is stopped.
【００３０】 従って、本実施形態の仰角調整機構を用いれば、図８及び図９に示す如く、支 柱１４を折り畳んだときに、ステージ部１３に対しミラー部３及びレンズ部４を 極力スペースのとらない状態に収納できる。尚、図８及び図９では、ステージ部 １３に対するレンズ取付け部６及びミラー部３との収納状態を示す便宜上、仰角 調整機構を省略してある。 即ち、支柱１４を折曲げてゆくとヘッド部は、ステージ部１３に当接せしめら れるが、更に支柱１４を折曲げると、図９に示す如く、レンズ取付け部３は上方 へ力が加えられて、仰角調整用連結部材（図示省略）が上方に押し上げられ、レ ンズ取付け部６が、上方へ回動せしめられると共に、ミラー部３が、レンズ取付 け部６の半分の回転角度で下方へ回動せしめられながら、ミラー部３及びレンズ 取付け部６は、ステージ部１３に密着するまで仰角が調整される。 なお、本実施形態の仰角調整機構は、仰角を拡げることにより、ステージ部に 対しミラー部及びレンズ部を極力スペースのとらない状態に収納できるようにし たものであり、仰角を狭める方向に調整するようには設けられていないが、ミラ ー部及びレンズ部がステージ部の輪郭に沿って密着したときの角度を仰角の調整 可能な最大角となるようにしておけば、仰角を狭める必要が生じないので好まし い。Therefore, by using the elevation angle adjusting mechanism of the present embodiment, as shown in FIGS. 8 and 9, when the support column 14 is folded, the mirror section 3 and the lens section 4 are arranged in a space as small as possible with respect to the stage section 13. Can be stored in a state that does not take. Note that, in FIGS. 8 and 9, the elevation angle adjusting mechanism is omitted for the sake of convenience of showing the housed state of the lens mounting portion 6 and the mirror portion 3 with respect to the stage portion 13. That is, when the column 14 is bent, the head portion is brought into contact with the stage portion 13. However, when the column 14 is further folded, a force is applied upward to the lens mounting portion 3 as shown in FIG. Then, the elevation angle adjustment connecting member (not shown) is pushed upward, the lens mounting portion 6 is rotated upward, and the mirror portion 3 is moved downward at a rotation angle half that of the lens mounting portion 6. While being rotated, the elevation angle of the mirror section 3 and the lens mounting section 6 is adjusted until they come into close contact with the stage section 13. The elevation angle adjusting mechanism according to the present embodiment is configured to expand the elevation angle so that the mirror section and the lens section can be housed in a state where the space is as small as possible with respect to the stage section. Although it is not provided, it is necessary to narrow the elevation angle by setting the angle when the mirror part and the lens part are in close contact with each other along the contour of the stage part to the maximum adjustable angle of elevation angle. I don't like it.
【００３１】 また、既述の如く、従来のオーバーヘッドプロジェクタにおいては、支柱を収 納する際には、安全面等の問題から手で支持しながら収納位置まで折り畳まなけ ればならないが、手で支持することなく安全に折畳まれるようにできれば、本考 案の仰角調整機構と相まって、支柱の収納操作を一層簡単化できるので好ましい 。 そこで、図８及び９に示す如く、回転軸にダンパー１５を設けて、ゆっくりと 倒れるようにした支柱１４に支持されたヘッド部に上述の如き本考案の仰角調整 機構（図示省略）を組み合わせれば、支柱１４はヘッド部の重力により折畳まれ てゆくが、このとき、ダンパー１５の作用によって倒れる速度が抑えられるので 、レンズ取付け部６がステージ部１３に対し緩やかに接触した後にレンズ取付け 部６及びミラー部３がステージ部１３に対し密着するようにその仰角を緩やかに 調整せしめられ、支柱の収納操作を一層簡単且つ安全確実に行うことができる。 なお、ダンパー１５は、支柱１４をゆっくりと折畳むことができれば、その構 成の如何は問わない。Further, as described above, in the conventional overhead projector, when the support column is stored, it is necessary to fold it up to the storage position while supporting it by hand due to safety issues and the like. If it can be safely folded without doing this, it is preferable because it can further simplify the operation of storing the column, together with the elevation angle adjustment mechanism of the present proposal. Therefore, as shown in FIGS. 8 and 9, a damper 15 is provided on the rotary shaft, and the head portion supported by the column 14 which is slowly tilted is combined with the above-described elevation angle adjusting mechanism (not shown) of the present invention. For example, the column 14 is folded due to the gravity of the head part, but at this time, the speed of falling by the action of the damper 15 is suppressed, so that the lens mounting part 6 gently contacts the stage part 13 and then the lens mounting part The elevation angle is gently adjusted so that the mirror 6 and the mirror portion 3 come into close contact with the stage portion 13, so that the operation of storing the column can be performed more easily and securely. The damper 15 may have any structure as long as it can slowly fold the support column 14.
【００３２】[0032]
以上、本考案によるアンダーミラー方式オーバーヘッドプロジェクタの仰角調 整機構によれば、簡単な操作で、支柱をコンパクトに収納することができる。 As described above, according to the elevation angle adjusting mechanism of the under mirror type overhead projector according to the present invention, the column can be compactly housed by a simple operation.
【００３３】 また、このとき、支柱の回転軸にダンパーを取り付ければ、手を離した状態で 、支柱をコンパクト且つ安全に折畳むことができるので、収納操作をより簡単化 できる。また、支柱が急激に倒れたり、跳ね上がったりすることがないので、よ り、安全に支柱の折畳み操作をすることができ、しかも、収納時にヘッド部がス テージに衝突することがないので、製品の破損を防止でき、ひいては装置の寿命 を延ばすことができる。Further, at this time, if the damper is attached to the rotation shaft of the column, the column can be folded compactly and safely with the hand released, so that the storing operation can be further simplified. In addition, since the column does not fall or jump up suddenly, it is possible to safely fold the column, and the head does not collide with the stage during storage. Can be prevented from being damaged, and the life of the device can be extended.
【００３４】 更に、ミラー部及び投影レンズ部がステージ部の輪郭に沿うように密着したと きの角度を仰角の調整可能な最大角となるようにしておけば、仰角を狭める必要 が生じないので収納操作をより効率化できる。Further, if the angle when the mirror section and the projection lens section are in close contact with each other along the contour of the stage section is set to the maximum adjustable angle of elevation, it is not necessary to narrow the elevation angle. The storage operation can be made more efficient.
【００３５】[0035]
【図１】本考案によるアンダーミラー方式オーバーヘッ
ドプロジェクタの仰角調整機構の一実施形態を示す側面
図である。FIG. 1 is a side view showing an embodiment of an elevation angle adjusting mechanism of an under mirror type overhead projector according to the present invention.
【図２】本実施形態におけるミラー部を示す図であり、
(a) は側面図、(b) は部分斜視図である。FIG. 2 is a diagram showing a mirror unit in the present embodiment,
(a) is a side view and (b) is a partial perspective view.
【図３】本実施形態におけるレンズ取付け部を示す図で
あり、(a) はミラー部にレンズ取付け部を取り付けた状
態を示す側面図、(b) はレンズ取付け部の斜視図であ
る。3A and 3B are diagrams showing a lens mounting portion in the present embodiment, FIG. 3A is a side view showing a state where the lens mounting portion is mounted on a mirror portion, and FIG. 3B is a perspective view of the lens mounting portion.
【図４】本実施形態におけるベース板及び仰角調整部材
を示す図であり、(a) は図３(a) においてベース板を取
り付けた状態を示す側面図、(b) はベース板の斜視図、
(c) は仰角調整部材の分解斜視図である。4A and 4B are views showing a base plate and an elevation angle adjusting member according to the present embodiment, FIG. 4A is a side view showing a state where the base plate is attached in FIG. 3A, and FIG. 4B is a perspective view of the base plate. ,
(c) is an exploded perspective view of an elevation angle adjusting member.
【図５】本実施形態の仰角調整部材による仰角の調整状
態を示す図であり、(a) は仰角調整部材の側面図、(b)
はレンズ取付け部とミラー部の回転角度を示す図であ
る。5A and 5B are diagrams showing an elevation angle adjustment state by the elevation angle adjustment member of the present embodiment, FIG. 5A is a side view of the elevation angle adjustment member, and FIG.
FIG. 4 is a diagram showing a rotation angle between a lens mounting portion and a mirror portion.
【図６】本実施形態による仰角の調整状態を示す側面図
である。FIG. 6 is a side view showing an adjustment state of an elevation angle according to the present embodiment.
【図７】本実施形態による図６とは異なる方法を用いた
仰角の調整状態を示す側面図である。FIG. 7 is a side view showing an elevation angle adjustment state using a method different from that of FIG. 6 according to the present embodiment.
【図８】支柱折畳み機構にダンパーを取り付けたアンダ
ーミラー方式オーバーヘッドプロジェクタの使用状態を
示す説明図である。FIG. 8 is an explanatory diagram showing a usage state of an under-mirror type overhead projector in which a damper is attached to a column folding mechanism.
【図９】支柱折畳み機構にダンパーを取り付けたアンダ
ーミラー方式オーバーヘッドプロジェクタの折畳み状態
を示す説明図である。FIG. 9 is an explanatory diagram showing a folded state of an under-mirror type overhead projector in which a damper is attached to a column folding mechanism.
【図１０】オーバーミラー方式オーバーヘッドプロジェ
クタのヘッド部を示す概略図である。FIG. 10 is a schematic diagram showing a head unit of an over-mirror type overhead projector.
【図１１】アンダーミラー方式オーバーヘッドプロジェ
クタの仰角調整機構の従来例を示す部分図である。FIG. 11 is a partial view showing a conventional example of an elevation angle adjusting mechanism of an under mirror type overhead projector.
【図１２】図１１の従来例における仰角調整状態をそれ
ぞれ(a) ，(b) に示す側面図である。FIG. 12 is a side view showing elevation angle adjustment states in the conventional example of FIG. 11 in (a) and (b), respectively.
１ ヘッド部 ２ ベース板 ２ａ 軸 ２ｂ，２ｃ 逃げ穴 ３ ミラー部 ４ ミラーカバー ５ ミラー用仰角調整部材 ５ａ 軸穴 ５ｂ ミラー用仰角調整軸 ６ レンズ取付け部 ７ レンズ取付け用金具 ７ａ 側端部 ８ レンズ用仰角調整部材 ８ａ 軸穴 ８ｂ レンズ用仰角調整軸 ８ｃ 窓 ９ 仰角調整用部材 １０ 仰角調整用螺子受け部材 １０ｂ，１０ｃ 逃げ穴 １０ｄ 折曲げ部 １０ｅ 貫通穴 １１ 仰角調整軸連結部材 １１ａ，１１ｂ 穴 １１ｃ 螺子穴 １２ 仰角調整撮み １２ａ 螺子部 １２ｂ 撮み部 １２ｂ’ 底部 １３ ステージ部 １４ 支柱 １５ ダンパー 1 Head part 2 Base plate 2a Shafts 2b, 2c Clearance hole 3 Mirror part 4 Mirror cover 5 Mirror elevation angle adjusting member 5a Axis hole 5b Mirror elevation angle adjusting shaft 6 Lens mounting part 7 Lens mounting bracket 7a Side end part 8 Lens Elevation angle adjusting member 8a Shaft hole 8b Lens elevation angle adjusting shaft 8c Window 9 Elevation angle adjusting member 10 Elevation angle adjusting screw receiving member 10b, 10c Escape hole 10d Bent portion 10e Through hole 11 Elevation angle adjusting shaft connecting member 11a, 11b Hole 11c Screw Hole 12 Elevation adjustment shooting 12a Screw 12b Shooting 12b 'Bottom 13 Stage 14 Prop 15 Damper
Claims (5)
て備えたヘッド部と、前記ヘッド部を支持する支柱と、
支柱折畳み機構を備えたアンダーミラー方式オーバーヘ
ッドプロジェクタにおいて、 前記ミラー部と前記投影レンズ部にそれぞれ設けられた
調整軸を遊嵌せしめると共に、螺子を遊嵌せしめ且つ螺
子の撮みを支持しうるように形成された支持金具と、 前記それぞれの調整軸を連結すると共に螺子に螺合可能
となるように形成された連結部材と、 前記支持金具及び前記連結部材を貫通する撮み付き螺子
とを、 前記螺子の回動及び上下動により、前記ミラー部及び前
記投影レンズ部が所定の比率で回動されるように備えた
ことを特徴とするレンズとミラーの仰角調整機構。1. A head portion provided with a mirror portion and a projection lens portion coaxially attached to each other, and a column for supporting the head portion,
In an under-mirror type overhead projector having a strut-folding mechanism, adjustment shafts respectively provided in the mirror section and the projection lens section are loosely fitted, and a screw is loosely fitted and a picture of the screw can be supported. A support member formed, a connecting member formed to connect the respective adjustment shafts and be screwed into a screw, and a captured screw penetrating the support member and the connecting member, An elevation angle adjusting mechanism for a lens and a mirror, wherein the mirror portion and the projection lens portion are rotated at a predetermined ratio by rotation and vertical movement of a screw.
て備えたヘッド部と、前記ヘッド部を支持する支柱と、
支柱折畳み機構を備えたアンダーミラー方式オーバーヘ
ッドプロジェクタにおいて、 前記ミラー部と前記投影レンズ部の前記軸から異なる半
径の部位にそれぞれ設けられた調整軸を遊嵌せしめると
共に、前記軸を中心とする円の接線に平行に螺子を遊嵌
せしめ且つ螺子の撮みを支持しうるように形成された支
持金具と、 前記それぞれの調整軸を連結すると共に前記支持金具に
遊嵌せしめられる螺子に螺合可能となるように形成され
た連結部材と、 前記支持金具及び前記連結部材を貫通する撮み付き螺子
とを備え、 前記螺子を回動したとき、前記連結部材が前記螺子との
相対的位置を変えながら移動せしめられ、前記螺子を押
し上げたとき、前記連結部材が前記螺子との相対的位置
を維持しながら移動せしめられて、前記ミラー部及び前
記投影レンズ部が所定の比率で回動されるようにしたこ
とを特徴とするレンズとミラーの仰角調整機構。2. A head portion provided with a mirror portion and a projection lens portion coaxially attached to each other, and a column supporting the head portion.
In an under-mirror type overhead projector having a strut-folding mechanism, adjustment shafts respectively provided at portions of the mirror portion and the projection lens portion having different radii from the axis are loosely fitted, and a circle centered on the axis is formed. A support metal fitting formed to allow a screw to be loosely fitted in parallel to the tangent line and to support the captured image of the screw, and to be capable of being screwed into a screw that is loosely fitted to the support fitting while connecting the respective adjustment shafts. A connecting member formed so as to form a support member and a screw with a photograph penetrating the connecting member. When the screw is rotated, the connecting member changes a relative position with respect to the screw. When the screw is pushed up and the screw is pushed up, the connecting member is moved while maintaining the relative position with the screw, and the mirror portion and the projection unit are moved. An elevation angle adjusting mechanism for a lens and a mirror, wherein the shadow lens portion is rotated at a predetermined ratio.
て備えたヘッド部と、前記ヘッド部を支持する支柱と、
支柱折畳み機構を備えたアンダーミラー方式オーバーヘ
ッドプロジェクタにおいて、 前記ヘッド部には、前記ミラー部と前記投影レンズ部の
前記軸から異なる半径の部位にそれぞれ設けられた調整
軸を遊嵌せしめる溝と、前記軸を中心とする円の接線に
平行に螺子を遊嵌せしめる貫通穴が設けられ、且つ、上
部で螺子の撮みを支持しうる一対の折曲げ部とが形成さ
れた支持金具と、 前記それぞれの調整軸を連結する穴と、前記支持金具に
遊嵌せしめられる螺子に螺合可能となるように螺子溝と
が形成され、前記支持金具の折曲げ部の間に配置された
連結部材と、 前記支持金具及び前記連結部材を貫通する撮み付き螺子
とからなる仰角調整部材を備え、 前記螺子を回動したとき、前記連結部材が前記螺子との
相対的位置を変えながら移動せしめられ、前記螺子を押
し上げたとき、前記連結部材が前記螺子との相対的位置
を維持しながら移動せしめられて、前記ミラー部及び前
記投影レンズ部が所定の比率で回動されるようにしたこ
とを特徴とするレンズとミラーの仰角調整機構。3. A head portion provided with a mirror portion and a projection lens portion coaxially attached to each other, and a column supporting the head portion.
In an under mirror type overhead projector having a strut folding mechanism, in the head part, grooves for loosely fitting adjustment shafts respectively provided at portions having different radii from the axes of the mirror part and the projection lens part, A support metal fitting having a through hole in which a screw is loosely fitted in parallel with a tangent line of a circle centered on the axis, and a pair of bent portions capable of supporting a captured image of the screw at an upper portion, A hole for connecting the adjusting shaft, and a screw groove formed so as to be screwed into a screw loosely fitted to the support fitting, and a connecting member arranged between the bent portions of the support fitting, An elevation angle adjusting member including a support screw and a captured screw penetrating the connecting member is provided, and when the screw is rotated, the connecting member is moved while changing a relative position with the screw. When the screw is pushed up, the connecting member is moved while maintaining the relative position with the screw, and the mirror portion and the projection lens portion are rotated at a predetermined ratio. A lens and mirror elevation angle adjustment mechanism characterized by this.
て備えたヘッド部と、前記ヘッド部を支持する支柱と、
支柱折畳み機構を備えたアンダーミラー方式オーバーヘ
ッドプロジェクタにおいて、 前記支柱折り畳み機構にダンパーを備えると共に、 前記ヘッド部には、前記ミラー部と前記投影レンズ部の
前記軸から異なる半径の部位にそれぞれ設けられた調整
軸を遊嵌せしめる溝と、前記軸を中心とする円の接線に
平行に螺子を遊嵌せしめる貫通穴が設けられ、且つ、上
部で螺子の撮みを支持しうる一対の折曲げ部とが形成さ
れた支持金具と、 前記それぞれの調整軸を連結する穴と、前記支持金具に
遊嵌せしめられる螺子に螺合可能となるように螺子溝と
が形成され、前記支持金具の折曲げ部の間に配置された
連結部材と、 前記支持金具及び前記連結部材を貫通する撮み付き螺子
とからなる仰角調整部材とを備え、 前記螺子を回動したとき、前記連結部材が前記螺子との
相対的位置を変えながら移動せしめられ、前記支柱の折
曲げ時には、前記ヘッド部がステージ部に対し徐々に当
接方向に力が加えられ、前記螺子が徐々に押し上げられ
ると共に前記連結部材が前記螺子との相対的位置を維持
しながら徐々に移動せしめられて、前記ミラー部及び前
記投影レンズ部が所定の比率で回動されるようにしたこ
とを特徴とするレンズとミラーの仰角調整機構。4. A head portion provided with a mirror portion and a projection lens portion coaxially attached to each other, and a column supporting the head portion.
In an under mirror type overhead projector having a column folding mechanism, the column folding mechanism is provided with a damper, and the head section is provided at portions of different radii from the axis of the mirror section and the projection lens section. A groove into which the adjustment shaft is loosely fitted, a through hole into which the screw is loosely fitted in parallel with the tangent of a circle centered on the shaft, and a pair of bent portions capable of supporting the photographing of the screw at the upper part, Is formed, a hole for connecting the respective adjustment shafts, and a screw groove so as to be screwed into a screw loosely fitted to the support fitting, and a bent portion of the support fitting. An elevation angle adjusting member including a connecting member disposed between the connecting member and a support fitting and a screw with a penetrating the connecting member. When the screw is rotated, the connecting member is connected. The member is moved while changing the relative position with respect to the screw, and when the pillar is bent, a force is gradually applied to the head part in the contact direction with respect to the stage part, and the screw is gradually pushed up. The lens and the mirror, wherein the connecting member is gradually moved while maintaining the relative position with the screw, so that the mirror unit and the projection lens unit are rotated at a predetermined ratio. Elevation angle adjustment mechanism.
て備えたヘッド部と、前記ヘッド部を支持する支柱と、
支柱折畳み機構を備えたアンダーミラー方式オーバーヘ
ッドプロジェクタにおいて、 前記支柱折り畳み機構にダンパーを備えると共に、 前記ヘッド部には、前記ミラー部と前記投影レンズ部の
前記軸から異なる半径の部位にそれぞれ設けられた調整
軸を遊嵌せしめる溝と、前記軸を中心とする円の接線に
平行に螺子を遊嵌せしめる貫通穴が設けられ、且つ、上
部で螺子の撮みを支持しうる一対の折曲げ部とが形成さ
れた支持金具と、 前記それぞれの調整軸を連結する穴と、前記支持金具に
遊嵌せしめられる螺子に螺合可能となるように螺子溝と
が形成され、前記支持金具の折曲げ部の間に配置された
連結部材と、 前記支持金具及び前記連結部材を貫通する撮み付き螺子
とからなる仰角調整部材とを備え、 前記螺子を回動したとき、前記連結部材が前記螺子との
相対的位置を変えながら移動せしめられ、前記支柱の折
曲げ時には、前記ヘッド部がステージ部に対し徐々に当
接方向に力が加えられ、前記螺子が徐々に押し上げられ
ると共に前記連結部材が前記螺子との相対的位置を維持
しながら徐々に移動せしめられて、前記ミラー部及び前
記投影レンズ部が所定の比率で回動されるようにし、更
に、 前記ミラー部及び前記投影レンズ部が前記ステージ部の
輪郭に沿うように密着したときの角度が仰角の調整可能
な最大角となるようにしたことを特徴とするレンズとミ
ラーの仰角調整機構。5. A head portion provided with a mirror portion and a projection lens portion coaxially attached to each other, and a column supporting the head portion.
In an under mirror type overhead projector having a column folding mechanism, the column folding mechanism is provided with a damper, and the head section is provided at portions of different radii from the axis of the mirror section and the projection lens section. A groove into which the adjustment shaft is loosely fitted, a through hole into which the screw is loosely fitted in parallel with the tangent of a circle centered on the shaft, and a pair of bent portions capable of supporting the photographing of the screw at the upper part, Is formed, a hole connecting the respective adjustment shafts, and a screw groove to be screwed into a screw that is loosely fitted to the supporting metal fitting, and a bent portion of the supporting metal fitting. An elevation angle adjusting member including a connecting member arranged between the connecting member and a supporting metal fitting and a captured screw penetrating the connecting member, and when the screw is rotated, the connecting member is provided. The member is moved while changing the relative position with respect to the screw, and when the pillar is bent, a force is gradually applied to the head part in the contact direction with respect to the stage part, and the screw is gradually pushed up. The connecting member is gradually moved while maintaining the relative position with respect to the screw so that the mirror unit and the projection lens unit are rotated at a predetermined ratio, and further, the mirror unit and the projection unit. An elevation angle adjusting mechanism for a lens and a mirror, wherein an angle when the lens portion is in close contact along the contour of the stage portion is a maximum adjustable elevation angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1997003690U JP3043179U (en) | 1997-05-08 | 1997-05-08 | Lens and mirror elevation angle adjustment mechanism for under mirror type overhead projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1997003690U JP3043179U (en) | 1997-05-08 | 1997-05-08 | Lens and mirror elevation angle adjustment mechanism for under mirror type overhead projector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP3043179U true JP3043179U (en) | 1997-11-11 |
Family
ID=43177646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1997003690U Expired - Lifetime JP3043179U (en) | 1997-05-08 | 1997-05-08 | Lens and mirror elevation angle adjustment mechanism for under mirror type overhead projector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3043179U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3380853B2 (en) | 1999-02-18 | 2003-02-24 | 株式会社エルモ社 | Under mirror type overhead projector |
-
1997
- 1997-05-08 JP JP1997003690U patent/JP3043179U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3380853B2 (en) | 1999-02-18 | 2003-02-24 | 株式会社エルモ社 | Under mirror type overhead projector |
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