Scale on device for measuring displacement

A scale and displacement technology, applied in measuring devices, electrical devices, mechanical devices, etc., can solve the problems of corrosion, coolant and oil ingress, measurement errors, etc., and achieve the effect of full reliability

CN1217155CInactive Publication Date: 2005-08-31MITUTOYO CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2005-08-31
Estimated Expiration
Not applicable · inactive patent

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Abstract

A scale on an apparatus for measuring displacement is enclosed which comprises a scale member having a plural of rectangular gratings arranged with periodic pattern on the glass epoxy substrate and the like, a coating layer covered on the side of the scale member which a plural of the rectangular gratings are formed, a scale cover (film layer) which functions as a protective layer and a scale forming material bonded to the outer portion of the coating layer through an adhesive layer so as to keep contaminant, oil or particles from intruding between the rectangular grating and the adhesive layer such as an adhesive tape and the like.
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Description

field of invention

[0001] The invention relates to a scale on a device for measuring displacement, in particular providing a scale with high environmental resistance on the device for measuring displacement. Background of the invention

[0002] like Figure 4 The prior art shown, a scale on a device for measuring displacement, for example, a scale on an electronic caliper disclosed in US Patent No. 5,973,494 to Karl G. Mareliez et al., bonded to a crossbar of a slider Components (in the present invention Figure 4 Indicated as the top surface of P), the scale usually consists of a long printed circuit board. A plurality of rectangular wire grids 12 are spaced apart on a glass-epoxy substrate 11 along the printed circuit board at intervals. The scale also includes a scale cover 30, which is adhered to the top surfaces of the plurality of rectangular wire grids 12 by, for example, adhesive tape. The scale cover 30 acts as a shield for the adhesive layer 20 . Shield 30 may a...

Examples

Embodiment Construction

[0017] Referring to the accompanying drawings, preferred embodiments of the present invention will be described below. figure 1 is a cross-sectional view of the scale on the displacement measuring device of the first embodiment. The scale includes a scale part 10 that contains a plurality of rectangular wire grids distributed at intervals on a glass-epoxy resin substrate 11, etc., and one side of the scale part 10 that is formed with a plurality of rectangular wire grids 12 is covered. A coating 40 on the top, a scale cover (film layer) 30 used as a protective layer, and a scale constituting material adhered to the outside of the coating 40 by an adhesive layer 20 so as to prevent pollutants or oil from entering the rectangular wire grid 12 and between adhesive layers 20 such as adhesive tape.

[0018] The scale includes a coating 40 that is cleaned, activated, and roughened by plasma radiation after coating the coating 40 on the side of the scale where the rectangular wire ...