JPS5960607U - Lens barrel ball screw mechanism - Google Patents
Lens barrel ball screw mechanismInfo
- Publication number
- JPS5960607U JPS5960607U JP15678882U JP15678882U JPS5960607U JP S5960607 U JPS5960607 U JP S5960607U JP 15678882 U JP15678882 U JP 15678882U JP 15678882 U JP15678882 U JP 15678882U JP S5960607 U JPS5960607 U JP S5960607U
- Authority
- JP
- Japan
- Prior art keywords
- lens barrel
- screw mechanism
- ball
- ball screw
- view
- 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.)
- Pending
Links
Landscapes
- Focusing (AREA)
- Lens Barrels (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は、本考案に係るレンズ鏡筒のボールネジ機構を
カメラの自動合焦装置のレンズ鏡筒に適用した例を示す
断面図。第２図は、レンズ駆動装置の上視平面図。第３
図は、レンズ鏡筒の分解斜視図。第４図は、マスターレ
ンズ保持環の断面図。
第５図は、主鏡筒の縦断面図。第６図は、第５図に示す
主鏡筒の横断面図。第７図は、ネジ溝とボールとの関係
を説明する〃−めの説明図。第８図は、ボール支持環の
一部断面正面図。第９図は、第８図に示すボール支持環
の横断面図。第１０図は、ボール支持環の展開図。第１
１図は、１／２原理を説明するための説明図。第１２図
は、スライド規制孔の長さと、ボール支持環の軸方向の
長さとの関係を説明するための説明図。第１３図は、ラ
ッピングを説明するための説明図。第１４図は、ラッピ
ング処理後のボールとネジ溝との状態を説明するための
説明図。第１５図は、オートフォーカシング中のボール
とネジ溝との状態を説明するための説明図。第１６図は
、マスターレンズ群が至近距離合焦位置にあるときのス
トッパネジのスライド規制孔への係止位置関係を示す側
面図。第１７図は、マスターレンズ群が無限大合焦位置
にあるときのストッパネジのスライド規制孔への係止位
置関係を示す側面図。第１８図、第１９図はボールの配
列をダブルタイヤ式にしたものを示す図。第２０図は、
本考案に係るレンズ鏡筒のボー ・ルネジ機構をビデオ
カメラの前玉方式自動合焦装置のレンズ鏡筒に適用した
例を示す偏手断面図。
４・・・・・・レンズ鏡筒、１４・・・・・・主鏡筒、
１５・・・・・・回転筒、１７，２６・・・・・・ネジ
溝、２９・・・・・・ボール支持環、３０・・・・・・
ボール支持穴。
漂
−Ｇ−
−−−Ｈ
第２FIG. 1 is a sectional view showing an example in which a ball screw mechanism for a lens barrel according to the present invention is applied to a lens barrel of an automatic focusing device of a camera. FIG. 2 is a top plan view of the lens driving device. Third
The figure is an exploded perspective view of the lens barrel. FIG. 4 is a sectional view of the master lens holding ring. FIG. 5 is a longitudinal sectional view of the main lens barrel. FIG. 6 is a cross-sectional view of the main lens barrel shown in FIG. 5. FIG. 7 is a first explanatory diagram illustrating the relationship between the screw groove and the ball. FIG. 8 is a partially sectional front view of the ball support ring. FIG. 9 is a cross-sectional view of the ball support ring shown in FIG. 8. FIG. 10 is a developed view of the ball support ring. 1st
Figure 1 is an explanatory diagram for explaining the 1/2 principle. FIG. 12 is an explanatory diagram for explaining the relationship between the length of the slide regulating hole and the axial length of the ball support ring. FIG. 13 is an explanatory diagram for explaining wrapping. FIG. 14 is an explanatory diagram for explaining the state of the ball and screw groove after the lapping process. FIG. 15 is an explanatory diagram for explaining the state of the ball and screw groove during autofocusing. FIG. 16 is a side view showing the positional relationship of the stopper screw to the slide regulating hole when the master lens group is at the close focus position. FIG. 17 is a side view showing the positional relationship of the stopper screw to the slide regulating hole when the master lens group is at the infinity focus position. FIGS. 18 and 19 are diagrams showing a double tire arrangement of balls. Figure 20 shows
FIG. 2 is an eccentric sectional view showing an example in which the ball screw mechanism of the lens barrel according to the present invention is applied to a lens barrel of a front lens type automatic focusing device of a video camera. 4...Lens barrel, 14...Primary barrel,
15... Rotating tube, 17, 26... Screw groove, 29... Ball support ring, 30...
Ball support hole. Drifting-G----H 2nd
Claims (1)
溝と対向するようにネジ溝が設けられた回転筒と、 該固定筒と回転筒との間に介在され、周回り方向に所定
間隔をあけて複数個の支持孔が形成されて列孔とされた
支持孔列が軸方向に所定の間隔をあけて複数列設けられ
ているボール支持環と、該ボール支持環の支持孔に回転
自在に、かつ、前記固定筒と回転筒とのネジ溝に接触す
るように設けられたホールと、 を備えたレンズ鏡筒のボールネジ機構。[Claim for Utility Model Registration] A fixed cylinder having a thread groove in the circumferential direction, a rotating cylinder having a thread groove facing the thread groove of the fixed cylinder, and between the fixed cylinder and the rotating cylinder. A ball support ring in which a plurality of support holes are formed at predetermined intervals in the circumferential direction, and a plurality of rows of support holes are provided at predetermined intervals in the axial direction. A ball screw mechanism for a lens barrel, comprising: a hole rotatably provided in a support hole of the ball support ring and in contact with a thread groove of the fixed barrel and the rotating barrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15678882U JPS5960607U (en) | 1982-10-16 | 1982-10-16 | Lens barrel ball screw mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15678882U JPS5960607U (en) | 1982-10-16 | 1982-10-16 | Lens barrel ball screw mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5960607U true JPS5960607U (en) | 1984-04-20 |
Family
ID=30345855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15678882U Pending JPS5960607U (en) | 1982-10-16 | 1982-10-16 | Lens barrel ball screw mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5960607U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01140521U (en) * | 1988-03-18 | 1989-09-26 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4920638U (en) * | 1972-05-26 | 1974-02-21 | ||
| JPS511868A (en) * | 1974-06-24 | 1976-01-09 | Shinkawa Seisakusho Kk | Riteenatsuki booruneji |
-
1982
- 1982-10-16 JP JP15678882U patent/JPS5960607U/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4920638U (en) * | 1972-05-26 | 1974-02-21 | ||
| JPS511868A (en) * | 1974-06-24 | 1976-01-09 | Shinkawa Seisakusho Kk | Riteenatsuki booruneji |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01140521U (en) * | 1988-03-18 | 1989-09-26 |
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