Hand-operated mechanism of band tape

A technology of hand crank and tape measure, applied in the direction of bendable ruler, etc., to achieve the effect of easy portability, safe and reliable work, compact and reasonable structure

Inactive Publication Date: 2008-05-21
NINGBO GREAT WALL PRECISION INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its structure is simple and the cost is low. However, the core and the hand-operated device rotate together without a clutch mechanism, so there are inevitably the aforementioned safety problems.

Method used

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  • Hand-operated mechanism of band tape
  • Hand-operated mechanism of band tape
  • Hand-operated mechanism of band tape

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] The present invention will be described in further detail below in conjunction with the embodiments of the drawings.

[0019] As shown in the figure, the attached drawings are numbered as rear ruler housing 1, front ruler housing 2, motor 3, pinion gear 4, transition gear 5, small bearing 6, large gear 7, ruler core clutch plate 8, ruler belt 9, large bearing 10. Battery 11, wire 12, switch 13, switch button 14, hand crank cover 15, hand crank cover fixing ring 16, hand crank positioning column 17, hand crank 18, hand crank sleeve 19, clutch claw 20, clutch claw Positioning column 21, torsion spring 22, housing 23, ruler core plate 24, housing body 25, handle 26, battery cavity 27, groove 28, socket 29, card slot 30, card foot 31, guide groove 32, Tooth or convex strip 33.

[0020] In this example, see figure 2 , 4 5. A hand crank device is also provided in the middle part of the housing 23 to facilitate hand cranking and recovery of the tape. The hand crank device include...

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PUM

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Abstract

The invention provides a hand-operated mechanism of a tapeline and comprises a hand-operated cover. The edge of the hand-operated cover is arranged in a shell in a rotating way through the fixed ring of the hand-operated cover; at least a jack socket is molded on the external surface of the hand-operated cover; a positioning column for the hand-operated handle of the hand-operated cover is connected with the hand-operated handle in a rotating way; one end of the hand-operated handle is provided with a hand-operated sleeve which can be inserted into the jack socket; in addition, the internal side of the handle-operated cover is connected with an on-off claw through the positioning column for the on-off claw in a rotating way and the on-off claw is close to the position of the jack socket; the positioning column for the on-off claw is sleeved with a torsion spring and one end of the torsion spring abuts with the wall surface of the hand-operated cover; the claw end of the on-off claw conducts on-off coordination with an on-off disk tooth or a raised line molded on a ruler core disk, meanwhile, the side edge of the on-off claw abuts with and matches with the hand-operated sleeve inserted into the jack socket so that the invention has more convenient use and the hand-operated device cannot rotate when a ruler belt is pulled out, and therefore, the invention can avoid wounding accident; the invention has compact and reasonable structure, safe and reliable work as well as easy use, moreover, the invention is portable and practical and can avoid mis-collision or mis-touch.

Description

Technical field [0001] The invention relates to a hand crank mechanism of a tape measure. Background technique [0002] Tape measure is one of the indispensable tools in measurement. It is widely used in various environments such as construction and industry. The tape measure with longer tape is generally a hand-cranked mechanism to recycle the tape. The general hand-cranked mechanism is composed of a hand-cranked cover. , Hand crank, hand crank sleeve, etc., the general hand crank mechanism and the rule core are fixed together, pull out the rule tape, the rule core and the hand crank device rotate together, and the defect of this design is when the rule tape is pulled out , The hand-cranked device should also be rotated when not in use, so that the user is likely to hurt his hands when he is not young, so this structure needs further improvement. [0003] For example, the Chinese patent "Hand-operated tape measure" with the patent number 01255096.5 discloses a tape measure in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B3/10
Inventor 黄忠华
Owner NINGBO GREAT WALL PRECISION INDAL
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