Measuring device

Patent metadata

Field	Value
Publication number	US-2022042863-A1
Application number	US-202117444313-A
Country	US
Kind code	A1
Filing date	Aug 3, 2021
Priority date	Aug 5, 2020
Publication date	Feb 10, 2022
Grant date	—

Abstract

There is provided a measuring device (dial gauge) capable of performing measurement with a desired measuring force regardless of the posture of the measuring device.
A dial gauge in an exemplary embodiment of the present invention includes a measuring force adjustment unit provided to a body case and capable of moving and being positioned and fixed in a direction substantially parallel to a moving direction of a spindle.
A biasing means has one end directly or indirectly engaged with the spindle and the other end directly or indirectly engaged with the measuring force adjustment unit, and biases the spindle toward a tip end.
The measuring force adjustment unit includes an external thread portion and a connection supporting member having one end screwed with the external thread portion and the other end coupled to the biasing means. The connection supporting member is screw-fed by rotationally operating the external thread portion in such a manner that a position of the connection supporting member is changed and fixed.

First claim

1 . A measuring device comprising:
a spindle having an elongate rod-like body and a tip end provided with a contact point brought into contact with an object to be measured; a body case supporting the spindle in such a manner as to move forward and backward in an axial direction; a measuring force adjustment unit provided to the body case and capable of moving and being positioned and fixed in a direction substantially parallel to a moving direction of the spindle; and a biasing means for biasing the spindle toward the tip end and having one end directly or indirectly engaged with the spindle and the other end directly or indirectly engaged with the measuring force adjustment unit.

2 . The measuring device according to claim 1 , wherein
the measuring force adjustment unit includes:
an external thread portion; and
a connection supporting member having one end screwed with the external thread portion and the other end coupled to the biasing means,
the body case includes a through hole provided in substantially parallel to the moving direction of the spindle, the measuring force adjustment unit is disposed in the through hole, and the connection supporting member is screw-fed by rotationally operating the external thread portion in such a manner that a position of the connection supporting member is changed and fixed.

3 . The measuring device according to claim 1 , wherein
the body case includes a slide groove provided in substantially parallel to the moving direction of the spindle, the slide groove includes an engaging groove formed in a direction orthogonal to an axial direction of the slide groove, and the measuring force adjustment unit is provided in such a manner as to slide in the slide groove, includes a key projection engaged with or disengaged from the engaging groove, and is positioned and fixed by engaging the key projection with the engaging groove.

4 . The measuring device according to claim 1 , wherein
an outer face of the body case or an outer face of the measuring force adjustment unit has a point allowing the measuring force adjustment unit to be positioned and fixed, and the point is provided with index values indicating measuring force applied to the spindle by the biasing means when the measuring force adjustment unit is at the point.

5 . The measuring device according to claim 4 , wherein the index values are provided in a plurality of sequences corresponding to a plurality of posture patterns of the measuring device.

6 . The measuring device according to claim 5 , wherein the index values are provided in the plurality of sequences each corresponding to when a posture of the measuring device is a normal posture, an inverted posture, or a lateral posture.

7 . The measuring device according to claim 1 , wherein
an outer face of the body case or an outer face of the measuring force adjustment unit has a point allowing the measuring force adjustment unit to be positioned and fixed, and the point is provided with an inter-graduation distance.

Assignees

• Mitutoyo Corp

Inventors

• Ichikawa Yuichi
• Saito Osamu

Classifications

• G01B3/22 Primary

  Feeler-pin gauges, e.g. dial gauges (for measuring contours or curvatures G01B5/20) · CPC title

• G01L1/042

  of helical springs · CPC title

• G01L5/108

  for measuring a reaction force applied on a single support, e.g. a glider · CPC title

• G01B5/0016

  due to weight (on machine tools B23Q11/001) · CPC title

• G01L1/044 Primary

  of leaf springs · CPC title