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Microcalliper

A technology of micrometers and measuring anvils, which is applied to micrometers, measuring devices, instruments, etc., can solve the problems of time-consuming installation, increased cost, increased weight, etc., and achieve high precision and maintain the effect of precision

Inactive Publication Date: 2004-05-12
MITUTOYO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing measures are to install the cover 110 with screws or the like at the part where the body 101 is grasped by hand, but such problems arise: not only increase the weight and enlarge it, but also time-consuming and cost-intensive installation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment

[0039] Fig. 1 is a sectional view showing a micrometer according to a first embodiment. The micrometer comprises: a substantially U-shaped body 11; an anvil 21 made of metal (for example, hard alloy) held at one end of the body 11; A measuring shaft 41 made of metal (such as alloy tool steel: SKS-3) that is rotated and advances and retreats relative to the anvil 21; an outer sleeve 51 that is fitted and fixed on the outside of the inner sleeve 31; rotatably Sleeve 61 fitted on the outer side of the outer sleeve 51 and integrally connected with the measuring shaft 41; a ratchet wheel arranged at the rear end of the measuring shaft 41 for idling when a certain load acts on the measuring shaft 41 Agency 71.

[0040] The body 11 includes: a frame 12 formed by bending a metal plate processed into a predetermined shape; and a resin 13 covering the outer surface of the frame 12 . That is, a frame 12 of a metal plate is used as an insert part, and a laminated structure is formed by ...

no. 2 Embodiment

[0068] Figure 8 It is a sectional view showing the micrometer of the second embodiment, Figure 9 It is an exploded perspective view showing a main part (body part). When describing them, the same reference numerals are attached to the same components as those of the first embodiment, and the description thereof is omitted or simplified.

[0069] The micrometer of this embodiment basically has the structural parts in the first embodiment, but the structure of the main body and the inner sleeve is different. Therefore, the anvil 21, the measuring shaft 41, the outer sleeve 51, the sleeve 61 and the ratchet mechanism 71 are the same as those of the first embodiment.

[0070] The main body 11 of this embodiment uses engineering plastics containing glass fiber with low coefficient of thermal expansion, high toughness, heat resistance, flame resistance, and chemical resistance. Here, polyphenylene sulfide (PPS) is used.

[0071] Inside the body 11 , there is a reinforcing membe...

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PUM

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Abstract

A micrometer, has a main body 11 holding an anvil 21 at one end portion and a spindle 41 at the other end portion through an inner sleeve 31 is formed with a frame 12 which is made by placing a pair of the frame elements 14A and 14B, which are formed by bending process of metal plate, one upon the other to reduce weight while ensuring the rigidity. The outside of the frame 12 is covered with resin 13 to reduce the weight, enhance the rigidity, and prevent the influence caused by the heat of hand when the frame 12 is gripped.

Description

technical field [0001] This invention relates to micrometers. Specifically, it relates to a micrometer that achieves cost reduction and weight reduction. Background technique [0002] The structure of the existing micrometer is shown in Figure 10, which has: a roughly U-shaped body 101; an anvil 102 held on one end of the body 101; and screwed on the other end of the body 101 through an inner sleeve 103 The measuring shaft 104 that advances and retreats relative to the measuring anvil 102; the outer sleeve 105 that is fitted and fixed on the outer side of the inner sleeve 103; rotatably fitted with the outer side of the outer sleeve 105 and connected with the measurement A bushing 106 integrally connected to the shaft 104; a ratchet mechanism 107 arranged at the rear end of the measuring shaft 104 and performing idle rotation when a certain load is applied to the measuring shaft 104. [0003] On the outer peripheral surface of the outer sleeve 105 , main scale scales 108 a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B3/18
CPCG01B3/18
Inventor 佐藤一中田清广浜野誓志三岛敏彦藤光彻
Owner MITUTOYO CORP