CN101419043A

CN101419043A - Micrometer

Info

Publication number: CN101419043A
Application number: CNA2007102021939A
Authority: CN
Inventors: 陈汉邦
Original assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2007-10-22
Filing date: 2007-10-22
Publication date: 2009-04-29
Anticipated expiration: 2027-10-22
Also published as: CN101419043B

Abstract

The invention provides a micrometer, which is used for measuring the thickness of a small-thickness part of an uneven-thickness element. The micrometer comprises two opposite measuring heads and an auxiliary jig, wherein the auxiliary jig comprises a fixing sleeve and a contact part; the fixing sleeve is sleeved on one of the measuring heads; the fixing sleeve has an end face opposite to the other measuring head; the contact part is fixed on the end face; the contact part is used to be in contact with a thinner part of a to-be-measured element; the distance from the contact surface of the contact part and the to-be-measured element to the end face of the fixing sleeve is a first distance; the distance from the part of a thicker part of the to-be-measured element on the opposite side of the fixing sleeve to the contact surface of the contact part and the to-be-measured element is a second distance; and the first distance is more than the second distance. As the micrometer adopts the auxiliary jig to measure the thickness of the small-thickness part of the uneven-thickness element, the micrometer does not need to be replaced with a micrometer in small size, and is more convenient for measurement.

Description

Milscale

Technical field

The present invention relates to the measurer of linear dimensions such as a kind of length, thickness, relate in particular to a kind of milscale.

Background technology

At present, the milscale linear dimension such as length, thickness that is widely used in accurate measuring sensor (sees also " The secondSucker Technique ", Journal of Bone and Joint Surgery, Vol 86-B, I ssue SUPP_I, 100,2004).Traditional milscale has two relative gauge heads, and the reading of milscale is two distances between the gauge head.During measuring sensor thickness, these two gauge heads are the contact measured element respectively, and the reading of milscale is the thickness of element under test at this moment.

Yet, the area of the gauge head end of same milscale is constant, if measure uneven thickness and the less element of surface of contact, peripheral skirt as a small-sized eyeglass, or bottom size is during less than bottom thickness of the trough-shaped body of the end surface size of milscale etc., this kind milscale then can't be measured, and then need to change the milscale of other specification this moment, brings inconvenience to measurement.

Summary of the invention

In view of this, be necessary to provide a kind of milscale that can measure the thin segment thickness of uneven thickness element.

A kind of milscale is used to measure the thickness of thin part of the element of uneven thickness, and this milscale comprises two relative gauge head and auxiliary fixtures.This auxiliary fixture comprises a fixed cover and a contact site, and this fixed cover is sheathed on one of them gauge head, and this fixed cover has and this another gauge head opposing end faces.This contact site is fixed in this end face, this contact site is used for contacting with the thin part of this element under test, the surface of contact of this contact site and element under test is first distance with respect to the distance of the end face of this fixed cover, this element under test be second distance in the part of the relative side of this fixed cover with respect to the distance of the surface of contact of this contact site and this element under test than thickness portion, this first distance is greater than this second distance.

With respect to prior art, this milscale adopts auxiliary fixture, because the distance that the distance of the end face of this surface of contact and this fixed cover is protruded with respect to this surface of contact than thickness portion greater than element under test, so can measure the thickness of the thin part of uneven thickness element, and need not to change the milscale of other specification, measure convenient.

Description of drawings

Fig. 1 is the synoptic diagram of the milscale of first embodiment of the invention.

Fig. 2 is the milscale of first embodiment of the invention and the synoptic diagram that cooperates of an element under test.

Fig. 3 is the milscale of second embodiment of the invention and the synoptic diagram that cooperates of another element under test.

Embodiment

Below in conjunction with accompanying drawing, the present invention is described in further detail.

See also Fig. 1 and Fig. 2, first embodiment of the invention provides a milscale 100, determinand is a biconvex lens 30, and this biconvex lens 30 comprises a main part 302 and the shirt rim 304 that is arranged at main part 302 peripheries, and the milscale 100 of present embodiment is used to measure the thickness of shirt rim 304.This milscale 100 comprises an arc chi frame 10, a measurement section 12, reaches one first gauge head 14.This measurement section 12 is installed in an end of arc chi frame 10, and this first gauge head 14 is fixed in the other end of arc chi frame 10.

This measurement section 12 comprises a fixed muffle 16, a microdrum 18 and one second gauge head 20.This fixed muffle 16 is fixed in an end of this arc chi frame 10, one end of this second gauge head 20 is threaded with fixed muffle 16 aperture surfaces, and pass this fixed muffle 16 and be fixedly connected with microdrum 18 inside bottom, the other end one end of second gauge head 20 is relative with first gauge head 14 that is fixed in arc chi frame 10 other ends, and microdrum 18 is enclosed within fixed muffle 16 surfaces.The surface of fixed muffle 16 axially is provided with rule 22 along it, and microdrum 18 is provided with rule 24 near an end of arc chi frame 10 along its excircle.

This milscale 100 further comprises one first auxiliary fixture 26 and second auxiliary fixture 28, and this first auxiliary fixture 26 and second auxiliary fixture 28 are enclosed within the end of this first gauge head 14 and second gauge head 20 respectively, and detachable.First auxiliary fixture 26 comprises one first fixed cover 32 and one first contact site 34.This first fixed cover 32 is a goblet, this goblet has a bottom 322 and reaches and the annular sidewall 324 that is provided with perpendicular to bottom 322, the shape of this bottom 322 and annular sidewall 324 is complementary and is placed in first gauge head, 14, the first fixed covers 32 with the end surface of first gauge head 14 and side view respectively and has one and second gauge head, 20 facing surfaces 36.This first contact site 34 is a hollow circular ring shape cylinder, one end of this first contact site 34 is fixed in the surface 36 of first fixed cover 32, this first contact site 34 axially and the axial coincidence of first gauge head 14 or parallel, the fixed form of first contact site 34 and first fixed cover 32 can be for bonding or one-body molded etc.The internal diameter of this first contact site 34 is greater than the external diameter of the main part 302 of this biconvex lens 30, and less than the external diameter of shirt rim 304, the height that the height on the surface 36 of end face to the first fixed cover 32 of first contact site 34 and lens 30 contacts protrudes with respect to shirt rim 304 greater than a side relative with surface 36 of the main part 302 of biconvex lens 30.The structure of this second auxiliary fixture 28 is identical with first auxiliary fixture 26 and the position is relative.

This second auxiliary fixture 28 comprises one second fixed cover 54 and one second contact site 42.The shape of this second fixed cover 54 is identical with first fixed cover 32 with structure, and is complementary and is placed in second gauge head, 20, the second fixed covers 54 with the shape of second gauge head 20 and have one and first contact site, 34 facing surfaces 56.This second contact site 42 is a hollow circular ring shape cylinder, one end of this second contact site 42 is fixed in the surface 56 of second fixed cover 54, this second contact site 42 axially and the axial coincidence of second gauge head 20 or parallel, the fixed form of second contact site 42 and second fixed cover 54 can be for bonding or one-body molded etc.The internal diameter of this second contact site 42 is greater than the external diameter of the main part 302 of this biconvex lens 30, and less than the external diameter of shirt rim 304, the height that the height on second contact site 42 and the surface 36 of end face to the second fixed cover 54 of the contact of lens 30 protrudes with respect to shirt rim 304 greater than a side relative with surface 56 of the main part 302 of lens 30.

It is as follows to use this milscale 100 to measure the method for shirt rim 304 thickness of these biconvex lens 30:

1) see also Fig. 1, rotation microdrum 18 drives second gauge head 20 and moves to the direction of first gauge head 14, and first auxiliary fixture 26 and second auxiliary fixture 28 are contacted, and reads one first numerical value by

rule

22 and 24.

2) see also Fig. 2, biconvex lens 30 is placed between first auxiliary fixture 26 and second auxiliary fixture 28, and first contact site 34 of this first auxiliary fixture 26 and the contact site 42 of second auxiliary fixture 28 are contacted respectively with two surfaces of shirt rim 304, read a second value by

rule

22 and 24 this moment, and the difference of this second value and this first numerical value is the thickness of the shirt rim 304 of biconvex lens 30.

Be appreciated that milscale 100 can also measure the shirt rim thickness of one side for the lens of convex surface is only arranged, or other center thickness is greater than the peripheral thickness of the element of peripheral thickness.In addition, measuring when one side is only arranged for the shirt rim thickness of the lens of convex surface, milscale can only be installed one of them of first auxiliary fixture 26 and second auxiliary fixture 28, is not limited to present embodiment.

See also Fig. 3, second embodiment of the invention provides a kind of milscale 200, the element under test 44 of present embodiment is a cell body, this element comprises bottom 442 and the vertical sidewall 444 that protrudes from bottom periphery, form a column structure, this milscale 200 is used to measure the thickness of this bottom 442, and wherein the base area of bottom 442 is less than the area of the end surface of first gauge head 14 and second gauge head 20.The structure of the milscale 100 of the structure of this milscale 200 and first embodiment is basic identical, difference is that this milscale 200 comprises one the 3rd auxiliary fixture 46, it is identical and be placed in second gauge head 20 that the 3rd auxiliary fixture 46 has the structure of one the 3rd fixed cover 48 and one the 3rd contact site, 50, the three fixed covers 48 and first fixed cover 32 of first auxiliary fixture 46.The 3rd contact site 50 is a cylinder, its axially with the axial coincidence of second gauge head 20 or parallel, the cross sectional shape of the 3rd contact site 50 is identical with the shape of the bottom 442 of element under test 44, area of section is less than the area of the part between wall portion 444 of bottom 442, and the surface of contact of the 3rd contact site 50 and element under test 44 protrudes from the height of bottom 442 greater than the wall portion 444 of element under test 44 with respect to the height on surface 52.The end that the outside of the 3rd fixed cover 48 has one and first gauge head, 14 facing surfaces, 52, the three contact sites 50 is fixed in the surface 52 of the 3rd fixed cover 48, and its fixed form can be for bonding or one-body molded etc.The other end of this contact site 50 is the plane, is used for contacting with the bottom 442 of this element under test 44.It is basic identical to utilize milscale 200 to measure milscale 100 measuring principles of the principle of element under tests 44 and first embodiment, repeats no more here.

The cross sectional shape that is appreciated that this contact site 50 can also be other shape, contacts with bottom 442 as long as the 3rd contact site 50 can extend in the cell body.Usually, the area of section of the 3rd contact site 50 is less than the area of the end face of second gauge head 20, with the element of measurement size less than the end size of second gauge head 20.Further, the 3rd contact site 50 can also be not limited to present embodiment for probe etc.

In addition, this milscale 200 also can be measured the bottom thickness of the trough-shaped body with stage body (clipping the cone of head) shape groove, as long as the 3rd contact site 50 can touch tested portion fully.The 3rd auxiliary fixture 46 can also be placed in first gauge head 14, or all is with the thickness that the 3rd auxiliary fixture 46 is measured the bottom of " H " font cell body on first gauge head 14 and second gauge head 20.In addition, the 3rd auxiliary fixture 46 can also be probe, is not limited to present embodiment.

With respect to prior art, milscale 100 adopt first auxiliary fixtures 26 and second auxiliary fixture 28 can measuring center thickness greater than the peripheral thickness of the element of peripheral thickness, milscale 200 adopted the 3rd auxiliary fixture 46 can measuring center thickness less than the center thickness of the element of peripheral thickness, need not change other measurer, only need on existing milscale, to install auxiliary fixture and get final product, make measurement convenient.

In addition, those skilled in the art also can do other variation in spirit of the present invention, and certainly, the variation that these are done according to spirit of the present invention all should be included within the present invention's scope required for protection.

Claims

[claim 1] a kind of milscale, be used to measure the thickness of thin part of the element of uneven thickness, this milscale comprises two relative gauge heads, it is characterized in that, further comprise one first auxiliary fixture, this first auxiliary fixture comprises one first fixed cover and one first contact site, this first fixed cover is sheathed on one of them gauge head, this first fixed cover has and this another gauge head opposing end faces, this first contact site is fixed in this end face, this first contact site is used for contacting with the thin part of this element under test, the surface of contact of this first contact site and element under test is first distance with respect to the distance of the end face of this first fixed cover, this element under test be second distance in the part of the relative side of this first fixed cover with respect to the distance of the surface of contact of this first contact site and this element under test than thickness portion, this first distance is greater than this second distance.
[claim 2] milscale as claimed in claim 1, it is characterized in that, further comprise one second auxiliary fixture, this second auxiliary fixture comprises one second fixed cover and one second contact site, this second fixed cover is placed in another gauge head of this milscale, this second contact site be fixed in this second fixed cover with this first contact site opposing end faces, the surface of contact of this second contact site and element under test is the 3rd distance with respect to the distance of the end face of this second fixed cover, this element under test be four distance in the part of the relative side of this second fixed cover with respect to the distance of the surface of contact of this second contact site and this element under test than thickness portion, the 3rd distance is greater than the 4th distance.
[claim 3] milscale as claimed in claim 1 is characterized in that, this first contact site is a circular cylinder, the axial coincidence of axial and this gauge head of this circular cylinder or parallel.
[claim 4] milscale as claimed in claim 2, it is characterized in that, this first contact site and second contact site are respectively a circular cylinder, this first contact site and this second contact site respectively with the axial coincidence of this another gauge head of gauge head and this or parallel, and this first contact site and this second contact site mutually over against.
[claim 5] milscale as claimed in claim 1 is characterized in that, this first contact site is a cylinder, the axial coincidence of axial and this gauge head of this cylinder or parallel.
[claim 6] milscale as claimed in claim 5, it is characterized in that, this gauge head has an end face, and the cross section of this cylinder is identical with the cross sectional shape of the thin part to be measured of this element under test, and the sectional area of this cylinder is less than the sectional area of the thin part to be measured of this element under test.
[claim 7] milscale as claimed in claim 2, it is characterized in that, this first contact site and second contact site are respectively a cylinder, this first contact site and this second contact site respectively with the axial coincidence of this another gauge head of gauge head and this or parallel, and this first contact site and this second contact site mutually over against.
[claim 8] milscale as claimed in claim 1 is characterized in that, this first contact site is a probe.
[claim 9] milscale as claimed in claim 1 is characterized in that, this fixed cover and contact site are fixed by mode bonding or that be formed in one.