CN202351497U - Cam-applied infrared optical focusing mechanism - Google Patents
Cam-applied infrared optical focusing mechanism Download PDFInfo
- Publication number
- CN202351497U CN202351497U CN2011205068642U CN201120506864U CN202351497U CN 202351497 U CN202351497 U CN 202351497U CN 2011205068642 U CN2011205068642 U CN 2011205068642U CN 201120506864 U CN201120506864 U CN 201120506864U CN 202351497 U CN202351497 U CN 202351497U
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- cam
- guiding mechanism
- base
- motor
- support
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Abstract
The utility model discloses a cam-applied infrared optical focusing mechanism which comprises a base, a cam, a motor, pressure springs and a guiding mechanism. A fixed bracket is arranged in the middle of the base; the cam is arranged on the base, both the lower end and the upper end of the cam are provided with shaft holes, and the cam is in running fit with a rotating shaft on the base through the shaft hole at the lower end of the cam; the motor is arranged above the cam, and an output shaft of the motor is fixed in the shaft hole at the upper end of the cam through a locating screw; the guiding mechanism is horizontally arranged on the base, the two ends of the guiding mechanism are respectively arranged on the two sides of the bracket, one end, on one side of the bracket, of the guiding mechanism is in contact with the rim of the cam, and the other end, on the other side of the bracket, of the guiding mechanism is provided with an adjusted object connecting piece; and the pressure springs are arranged between the bracket and the end, in contact with the cam, of the guiding mechanism, one ends of the pressure springs are connected with the bracket, and the other ends of the pressure springs are connected with the end, in contact with the cam, of the guiding mechanism.
Description
Technical field
The utility model relates to the structure of a kind of optical focusing mechanism, especially a kind of structure of using the infrared optics focus adjusting mechanism of cam.
Background technology
Existing optical focusing mainly contains curved groove and guide tracked focusing form.
The structure of common curved groove focusing form is as shown in Figure 1; Comprise motor 101, driven wheel 102, curved groove gear 103, guiding lens barrel 104, sliding screw 105 and limit switch 106; On the guiding lens barrel straight-line groove is arranged; On the curved groove gear curved groove is arranged,, realize moving moving axially of lens barrel position through the sliding screw motion in straight-line groove and curved groove simultaneously.
The structure of common guide tracked focusing form; Form by motor, guiding optical axis, linear bearing, leading screw; Rotate through the driven by motor leading screw; Make nut on the leading screw produce to move axially and realize focusing, the guiding mechanism of wherein being made up of linear bearing and guiding optical axis is mainly controlled the distance and the precision of focusing.
All there is following defective in these two kinds of focusing modes: the one, and need add stop means at two extreme positions, and will have a control circuit to control motor and processing limit signal, structure is complicated; The 2nd, motor needs rotating; The 3rd, what their were adjusted all is one or several eyeglass in the lens set, and the adjustment precision receives the influence of part processing distortion, variation of ambient temperature easily, and may exert an influence to picture element.
Summary of the invention
The purpose of the utility model is the defective to present optical focusing structure, improves and simplify the structure of existing focus adjusting mechanism, and improves image quality.
The technical scheme of the utility model is following:
A kind of infrared optics focus adjusting mechanism of using cam; It is characterized in that: comprise base, cam, motor, stage clip, guiding mechanism, the middle part of said base is provided with fixing support, and said cam is positioned on the base; The lower end and the upper end of said cam are equipped with axis hole; Cam is rotatably assorted with the rotating shaft that is located on the base through the axis hole of lower end, and said motor is positioned at the cam top, and the output shaft of motor is fixed in the axis hole of cam upper end through dog screw; Said guiding mechanism is horizontally set on the base, and its two ends lay respectively at the both sides of said support, and in a side of said support, an end of guiding mechanism contacts with the wheel rim of cam, and at the opposite side of said support, the other end of guiding mechanism is provided with the instrumentality web member; Said stage clip is between support and the guiding mechanism end that contacts with cam, and stage clip one end connects with said support, and the other end is connected with the guiding mechanism end with the cam contact.
The utility model is to use the cam principle to focus, and can let the driven by motor cam change to a direction in the practical application always, rotates through the reciprocation cycle of cam; Regulated quantity is controlled by the major axis of cam and the difference of minor axis; Regulative mode is an axially reciprocating, does not need the position feedback device, behind extreme position, can move round about automatically; Up to the position of finding blur-free imaging, do not need limit switch and correspondent control circuits; The utility model can reach higher degree of regulation with comparalive ease because be provided with guiding mechanism.
Description of drawings
Fig. 1 is the structural representation of existing a kind of focusing structure
Fig. 2 is the structural representation of the utility model
Embodiment
As shown in Figure 2; The utility model comprises base 1, cam 2, motor 3, stage clip 4, guiding mechanism 5, and the middle part of said base 1 is provided with fixing support 11, and said cam 2 is positioned on the base; The lower end and the upper end of said cam 2 are equipped with axis hole; Cam 2 is rotatably assorted with the rotating shaft 12 that is located on the base through the axis hole of lower end, and said motor 3 is positioned at cam 2 tops, and the output shaft 31 of motor is fixed in the axis hole of cam upper end through dog screw 6; Said guiding mechanism 5 is horizontally set on the base 1; Its two ends lay respectively at the both sides of the support on the said base, and in a side of said support, an end of guiding mechanism 5 contacts with the wheel rim of cam 2; At the opposite side of said support, the other end of guiding mechanism 5 is provided with instrumentality web member 7; Said stage clip 4 is between support 11 and the guiding mechanism end that contacts with cam, and stage clip 4 one ends connect with said support, and the other end is connected with the guiding mechanism end with the cam contact.
During the utility model work, the driven by motor cam rotation, the wheel rim of cam promotes the guiding mechanism motion, and guiding mechanism connects instrumentality through the instrumentality web member, realizes focusing.Because the effect of stage clip contacts guiding mechanism one end all the time with the cam wheel rim, when cam rotation contacts with guiding mechanism to the major axis side; Promoting guiding mechanism outwards moves; When cam rotation contacted with guiding mechanism to the minor axis side, under the effect of stage clip, guiding mechanism inwardly moved.Reciprocation cycle through cam is rotated, and drives the guiding mechanism axially reciprocating, up to the position of finding blur-free imaging.Above-mentioned focusing process motor rotates to a direction all the time; And need not have employed limit switch of mechanism and correspondent control circuits now, thereby simplify the structure, and the setting of guiding mechanism; Can reach higher degree of regulation with comparalive ease again, improve image quality.
Claims (1)
1. infrared optics focus adjusting mechanism of using cam; It is characterized in that: comprise base, cam, motor, stage clip, guiding mechanism, the middle part of said base is provided with fixing support, and said cam is positioned on the base; The lower end and the upper end of said cam are equipped with axis hole; Cam is rotatably assorted with the rotating shaft that is located on the base through the axis hole of lower end, and said motor is positioned at the cam top, and the output shaft of motor is fixed in the axis hole of cam upper end through dog screw; Said guiding mechanism is horizontally set on the base, and its two ends lay respectively at the both sides of said support, and in a side of said support, an end of guiding mechanism contacts with the wheel rim of cam, and at the opposite side of said support, the other end of guiding mechanism is provided with the instrumentality web member; Said stage clip is between support and the guiding mechanism end that contacts with cam, and stage clip one end connects with said support, and the other end is connected with the guiding mechanism end with the cam contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205068642U CN202351497U (en) | 2011-12-08 | 2011-12-08 | Cam-applied infrared optical focusing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205068642U CN202351497U (en) | 2011-12-08 | 2011-12-08 | Cam-applied infrared optical focusing mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202351497U true CN202351497U (en) | 2012-07-25 |
Family
ID=46540490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205068642U Expired - Lifetime CN202351497U (en) | 2011-12-08 | 2011-12-08 | Cam-applied infrared optical focusing mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202351497U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106125246A (en) * | 2016-07-19 | 2016-11-16 | 湖北三江航天红峰控制有限公司 | A kind of from the method seeking laser focal plane |
| CN108063896A (en) * | 2018-01-22 | 2018-05-22 | 舜宇光学(中山)有限公司 | A kind of focus control |
-
2011
- 2011-12-08 CN CN2011205068642U patent/CN202351497U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106125246A (en) * | 2016-07-19 | 2016-11-16 | 湖北三江航天红峰控制有限公司 | A kind of from the method seeking laser focal plane |
| CN108063896A (en) * | 2018-01-22 | 2018-05-22 | 舜宇光学(中山)有限公司 | A kind of focus control |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120725 |
|
| CX01 | Expiry of patent term |