CN102707407A - Unlimited skidding structure for preventing focusing jumping or disengaging of level instrument - Google Patents
Unlimited skidding structure for preventing focusing jumping or disengaging of level instrument Download PDFInfo
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- CN102707407A CN102707407A CN2012101819586A CN201210181958A CN102707407A CN 102707407 A CN102707407 A CN 102707407A CN 2012101819586 A CN2012101819586 A CN 2012101819586A CN 201210181958 A CN201210181958 A CN 201210181958A CN 102707407 A CN102707407 A CN 102707407A
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- focusing
- lens
- screw rod
- handwheel
- tooth
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Abstract
The invention relates to an unlimited skidding structure for preventing focusing jumping or disengaging of a level instrument. A focusing lens barrel and a concave lens are arranged between an objective lens and an ocular lens; the focusing lens barrel is opposite to the ocular lens; the focusing lens barrel and the concave lens are installed in a lens body; a screw rod passes through the lens body; a gear at the lower end of the screw rod is engaged with a rack on the focusing lens barrel; an upper end of the screw rod is located in a groove after passing through a focusing handwheel; the upper end of the screw rod is sleeved with an elastic washer and is spirally connected with a nut; the elastic washer and the focusing handwheel are compacted by the nut; and the focusing handwheel is in contact with a lens surface. In a focusing handwheel mechanism, the elastic gasket is additionally arranged and a positioning-limiting mechanism is cancelled; the unlimited rotation of the focusing handwheel can be realized only by controlling thickness and installation gap of the elastic washer; thus, even if the jumping occurs, because the focusing handwheel is not limited, the focusing lens barrel can return to an observation position with shortest sighting distance or infinite distances.
Description
Technical field
The present invention relates to have the spirit-leveling instrument instrument of surveying and mapping of focusing function from the shortest sighting distance to the unlimited distance, relate in particular to the structure of infinitely skidding that is used to prevent that the spirit-leveling instrument focusing from jumping tooth or taking off tooth.
Background technology
All kinds of spirit-leveling instrument products all belong to instrument of surveying and mapping, and its overwhelming majority is operation in the open air, and environment for use is more abominable, and the user of service is also more arduous, the also non-constant of traffic condition, and assemble, proofread and correct, wipe clearly and almost do not have condition; The focusing principle of all kinds of spirit-leveling instrument products is focusing handwheel and drives the ratch rotation, thereby traction rack and focusing drawtube move forward and backward, and realizes the observation focusing function from the shortest sighting distance to the unlimited distance; But it is spacing that the focusing handwheel of the employed all kinds of spirit-leveling instrument products of existing market all has, and handwheel can only rotate a circle, when instrument transportation, misoperation, fall, under the situation such as collision; Cause the jumping tooth in wheel and rack when engagement easily or take off the tooth phenomenon; This will cause instrument can not realize normal focusing, can't satisfy normal use, need reprocess; During charge for loss of working time, produce economic loss.
Summary of the invention
The objective of the invention is to overcome the deficiency that prior art exists; A kind of be used to prevent spirit-leveling instrument focusing jumping tooth or the structure of infinitely skidding of taking off tooth are provided; Be intended to solve the phenomenon of taking off tooth when reasons such as all kinds of spirit-leveling instruments are improper because of focusing, difference, transportation are proofreaied and correct in assembling, shift, stagger along cause gear and tooth bar engagement or jumping tooth, guarantee operate as normal.
The object of the invention is realized through following technical scheme:
Be used to prevent spirit-leveling instrument focusing jumping tooth or the structure of infinitely skidding of taking off tooth; Between object lens and eyepiece, arrange focusing drawtube and negative lens, focusing drawtube and negative lens are relative, and focusing drawtube and negative lens are installed in the mirror body; One screw rod passes the mirror body; The gear of screw rod lower end is meshed with tooth bar on the focusing drawtube, and characteristics are: the upper end of said screw rod is passed focusing handwheel and is arranged in its groove, and the upper end of screw rod is set with elastic washer and is connected with nut; Nut compresses elastic washer and focusing handwheel, and focusing handwheel contacts with mirror dignity.
Further, above-mentioned being used to prevents the structure of infinitely skidding that the spirit-leveling instrument focusing is jumped tooth or taken off tooth, and wherein, said elastic washer is two friction discs.
Substantive distinguishing features and obvious improvement that technical scheme of the present invention is outstanding are mainly reflected in:
Aspect focusing handwheel mechanism, increase elastic washer; Cancel position-limit mechanism simultaneously; As long as control the thickness and the assemblage gap of elastic washer well, just can realize that focusing handwheel infinitely rotates, even after jumping tooth like this; Because focusing handwheel does not have spacing, so still can make focusing drawtube be returned to shortest sighting distance or infinity observation place.Elastic washer adopts two friction discs, control gap, cancellation rotary stopper; Make it and infinitely to rotate; Adjustment tooth bar length to be to guarantee not take off tooth, no matter tooth appears jumping in tooth bar and ratch wherein, but need not do under the situation of any processing operate as normal still to instrument.
Description of drawings
Below in conjunction with accompanying drawing technical scheme of the present invention is described further:
Fig. 1: structural representation of the present invention.
Embodiment
As shown in Figure 1, be used to prevent spirit-leveling instrument focusing jumping tooth or the structure of infinitely skidding of taking off tooth, between object lens 1 and eyepiece 5, arrange focusing drawtube 2 and negative lens 6; Focusing drawtube 2 is relative with negative lens 6, and focusing drawtube 2 is installed in the mirror body 4 with negative lens 6, and a screw rod passes mirror body 4; The gear of screw rod lower end is meshed with tooth bar on the focusing drawtube 2; The upper end of screw rod is passed focusing handwheel 3 and is arranged in its groove, and the upper end of screw rod is set with elastic washer 8 and is connected with nut 7, and elastic washer is two friction discs; Nut 7 compresses elastic washer 8 and focusing handwheel 3, and focusing handwheel 3 contacts with 4 of mirror bodies.
All kinds of spirit-leveling instrument products all have the structure of tooth bar and ratch engagement, and the spirit-leveling instrument focusing handwheel of all kinds all has position-limit mechanism at present, and when jumping tooth or taking off tooth appears in tooth bar and ratch, instrument all can't operate as normal, need take apart re-assembly, proofread and correct, wiping etc. clearly.And the present invention is aspect focusing handwheel mechanism; Increase elastic washer 8, cancelled position-limit mechanism simultaneously, as long as control the thickness and the assemblage gap of elastic washer well; Just can realize that focusing handwheel infinitely rotates; Even after jumping tooth like this, spacing because focusing handwheel does not have, so still can make focusing drawtube 2 be returned to shortest sighting distance or infinity observation place.Elastic washer adopts two friction discs, control gap, cancellation rotary stopper; Make it and infinitely to rotate; Adjustment tooth bar length to be to guarantee not take off tooth, no matter tooth appears jumping in tooth bar and ratch wherein, but need not do under the situation of any processing operate as normal still to instrument.
What need understand is: the above only is a preferred implementation of the present invention; For those skilled in the art; Under the prerequisite that does not break away from the principle of the invention, can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (2)
1. be used to prevent spirit-leveling instrument focusing jumping tooth or the structure of infinitely skidding of taking off tooth; Between object lens and eyepiece, arrange focusing drawtube and negative lens, focusing drawtube and negative lens are relative, and focusing drawtube and negative lens are installed in the mirror body; One screw rod passes the mirror body; The gear of screw rod lower end is meshed with tooth bar on the focusing drawtube, and it is characterized in that: the upper end of said screw rod is passed focusing handwheel and is arranged in its groove, and the upper end of screw rod is set with elastic washer and is connected with nut; Nut compresses elastic washer and focusing handwheel, and focusing handwheel contacts with mirror dignity.
2. the structure of infinitely skidding that is used to prevent that the spirit-leveling instrument focusing from jumping tooth or taking off tooth according to claim 1, it is characterized in that: said elastic washer is two friction discs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101819586A CN102707407A (en) | 2012-06-05 | 2012-06-05 | Unlimited skidding structure for preventing focusing jumping or disengaging of level instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101819586A CN102707407A (en) | 2012-06-05 | 2012-06-05 | Unlimited skidding structure for preventing focusing jumping or disengaging of level instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102707407A true CN102707407A (en) | 2012-10-03 |
Family
ID=46900328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101819586A Pending CN102707407A (en) | 2012-06-05 | 2012-06-05 | Unlimited skidding structure for preventing focusing jumping or disengaging of level instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102707407A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107825828A (en) * | 2017-10-19 | 2018-03-23 | 贵州星瑞安科技有限公司 | A kind of portable printing alignment device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5877892A (en) * | 1996-04-01 | 1999-03-02 | Asahi Seimitsu Kabushiki Kaisha | Focus detecting apparatus for a telescope system |
| CN2575609Y (en) * | 2002-10-23 | 2003-09-24 | 沈建明 | Closed ballistic plate flowmeter |
| CN2757095Y (en) * | 2004-12-03 | 2006-02-08 | 中国地震局第二监测中心 | Indoor detector for digital level and optic level |
| JP2010066183A (en) * | 2008-09-12 | 2010-03-25 | Sokkia Topcon Co Ltd | Electronic level |
| CN101691999A (en) * | 2009-10-15 | 2010-04-07 | 苏州市太平洋光学仪器厂 | Automatic level with built-in micrometer panel and assembly method thereof |
| CN201803715U (en) * | 2010-07-06 | 2011-04-20 | 罗先照 | High-accuracy magnetic damping automatic leveling instrument |
| CN202676176U (en) * | 2012-06-05 | 2013-01-16 | 苏州凤凰索卡亚光电科技有限公司 | Infinite slipping structure for preventing leveling instrument from tooth-skipping or tooth-dropping during focusing |
-
2012
- 2012-06-05 CN CN2012101819586A patent/CN102707407A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5877892A (en) * | 1996-04-01 | 1999-03-02 | Asahi Seimitsu Kabushiki Kaisha | Focus detecting apparatus for a telescope system |
| CN2575609Y (en) * | 2002-10-23 | 2003-09-24 | 沈建明 | Closed ballistic plate flowmeter |
| CN2757095Y (en) * | 2004-12-03 | 2006-02-08 | 中国地震局第二监测中心 | Indoor detector for digital level and optic level |
| JP2010066183A (en) * | 2008-09-12 | 2010-03-25 | Sokkia Topcon Co Ltd | Electronic level |
| CN101691999A (en) * | 2009-10-15 | 2010-04-07 | 苏州市太平洋光学仪器厂 | Automatic level with built-in micrometer panel and assembly method thereof |
| CN201803715U (en) * | 2010-07-06 | 2011-04-20 | 罗先照 | High-accuracy magnetic damping automatic leveling instrument |
| CN202676176U (en) * | 2012-06-05 | 2013-01-16 | 苏州凤凰索卡亚光电科技有限公司 | Infinite slipping structure for preventing leveling instrument from tooth-skipping or tooth-dropping during focusing |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107825828A (en) * | 2017-10-19 | 2018-03-23 | 贵州星瑞安科技有限公司 | A kind of portable printing alignment device |
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Application publication date: 20121003 |