CN114199094A

CN114199094A - Vernier scale with magnifier

Info

Publication number: CN114199094A
Application number: CN202110150714.0A
Authority: CN
Inventors: 梁月强; 胡永辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-18
Filing date: 2021-02-04
Publication date: 2022-03-18

Abstract

Vernier calipers are widely used for length measurement in machining. However, in the case of measurement without a mechanical structure such as a scribe line, since the measuring jaw cannot be caught on the scribe line, a large measurement error occurs when the alignment of the measuring jaw and the scribe line is judged by naked eyes. The invention designs the magnifying lens assembly on the vernier to replace a measuring jaw, so that the measurement without mechanical structures such as marking and the like is more accurate and convenient.

Description

Vernier scale with magnifier

Technical Field

And (6) measuring the tool.

Background

The vernier caliper is widely applied to length measurement in machining, has high measurement accuracy, and can reach 0.05mm or 0.02 mm generally. However, in the case of measurement without a mechanical structure such as a scribe line, since the measuring jaw cannot be caught on the scribe line, a large measurement error occurs when the alignment of the measuring jaw and the scribe line is judged by naked eyes. The magnifying glass can magnify the image of the observed target, and the spatial resolution of naked eyes is improved. Relative to the measuring jaw, marks such as scale marks are more convenient for observing whether the measuring jaw is aligned with the measured target or not.

Disclosure of Invention

In order to overcome the defects of the vernier caliper, the vernier caliper with the magnifying lens is invented. The vernier scale consists of a main scale, a vernier and an amplifying mirror assembly; the plane of the measuring jaw of the main scale is vertical to the moving direction of the vernier, is aligned with the 0 scale of the main scale and is the initial position of measurement; the magnifier assembly is rigidly connected with the vernier and moves along with the vernier; the magnifying lens assembly comprises a magnifying lens, a reference mark and a connecting piece; the magnifier assembly is fixed on the vernier through a connecting piece. The magnifier can be a single convex lens, a compound lens or an electronic magnifier. The compound lens can be a cemented lens or a lens group. The reference mark may be a mark line or an indicator mark such as an arrow. The reference mark is positioned in one focal distance of the front field range of the magnifier. During measurement, a measured target leans against the plane of the measuring jaw of the main scale, the reference mark is attached to the measuring position on the measured target, the vernier is moved, the reference mark is aligned with the measuring position of the measured target which is also located in the field range of the magnifying lens, and the reading of the vernier is the distance from the measuring position of the measured target to the reference plane. Because the reference mark is close to the measured position of the measured object during measurement, the distance between the reference mark and the measured position of the measured object is only small, and the measurement is mainly carried out depending on the position of the reference mark. The smaller the distance between the reference mark and the measured target is, the smaller the measurement error generated by the collimation deviation of the magnifier is, and the magnifier mainly plays a role in magnifying images, so that the magnifier does not need special strict performance requirements on the collimation of the magnifier, and the manufacturing cost is greatly reduced.

Drawings

FIG. 1 is a schematic view of a vernier with a magnifying glass in embodiment 1

FIG. 2 is a schematic view of an enlarged mirror assembly in example 1

FIG. 3 is a schematic view of a semicircular fiducial mark plate in example 1

FIG. 4 is a schematic view of an enlarged mirror assembly in example 2

FIG. 5 is a schematic view of a glass reference mark plate in example 2

FIG. 6 is a schematic view of an enlarged mirror assembly in example 3

FIG. 7 is a schematic view of a reference mark measuring jaw in example 3

FIG. 8 is a schematic view of an enlarged mirror assembly in example 4

Example 1

A vernier with a magnifier (see figure 1) is composed of a main ruler 101, a vernier 102 and a magnifier assembly 103. And 104 is a main ruler measuring jaw plane. The plane of the measuring jaw of the main scale is perpendicular to the moving direction of the vernier, is aligned with the 0 scale of the main scale and is the starting position of measurement. The cursor 102 is a mechanical cursor. The magnifier assembly is rigidly connected to the cursor and moves with the cursor. The magnifier assembly main body is a cylindrical structure (see fig. 2), one end of the cylinder is a circular magnifier 201, and the other end is a semicircular reference mark plate 202. The main optical axis of the magnifier is perpendicular to the vernier movement direction. By rotating the magnifying lens end, the distance between the magnifying lens and the reference mark plate can be adjusted. The magnifier assembly body is attached to the cursor by a cursor connector 203. The magnifier is a single-chip convex lens, and the magnification is 10 times. The reference mark plate (see figure 3) is a semicircle made of stainless steel and is positioned in one-time focal distance of the front field range of the magnifier, the semicircle plane of the reference mark plate is vertical to the main optical axis of the magnifier, and the diameter edge is parallel to the motion direction of the vernier through the main optical axis. Reference mark arrow 301 points perpendicular to the diameter of the semicircular reference mark plate towards the centre of the circle. The reference mark plate is semicircular, so that the detected object can be observed through the other half of the hollow part from the magnifier. When the vernier is in zero position, the tip of the arrow head of the reference mark is aligned with the plane of the measuring jaw of the main scale. During measurement, a measured target leans against the plane of the main scale measuring jaw, the reference mark plate is attached to the measuring position on the measured target, the vernier is moved, the magnified reference mark arrow and the image of the measured target are observed through the magnifier, the sharp part of the reference mark arrow is aligned with the measuring position on the measured target which is also located in the field range of the magnifier, and the reading of the vernier is the distance from the measuring position on the measured target to the plane of the main scale measuring jaw.

Example 2

A vernier scale with a magnifier is composed of a main scale, a vernier and a magnifier assembly. The plane of the measuring jaw of the main scale is perpendicular to the moving direction of the vernier, is aligned with the 0 scale of the main scale and is the starting position of measurement. The vernier is a digital display vernier. The magnifier assembly is rigidly connected to the cursor and moves with the cursor. The magnifier assembly of this embodiment (see fig. 4) has a cylindrical body with a circular magnifier 401 at one end and a circular fiducial mark plate 402 at the other end. The magnifier is a compound lens, and the magnification of the magnifier is 20 times. The composite lens is a lens group consisting of a biconvex lens made of a single material and a single convex lens made of a single material. A button battery is arranged in the wall of the lens group cylinder, and an LED small lamp is arranged on the lens group cylinder towards the direction of the reference mark plate. The reference mark plate (see figure 5) is a round transparent glass material, is positioned in a focal length which is one time of the front field range of the magnifier, the round plane of the mark plate is vertical to the main optical axis of the magnifier, and is engraved with a reference mark vertical line 501 and a scale mark horizontal line 502. The reference mark vertical line and the reference mark horizontal line are perpendicular to each other. The horizontal line of the reference mark is parallel to the motion direction of the cursor. The reference mark vertical line is parallel to the main scale jaw plane. The width of each reference mark vertical line and each scale mark is 0.01mm, and each small grid of each scale mark is 0.05 mm. The reference mark plate is made of transparent glass so that the object to be measured can be observed through the reference mark plate from the magnifier. Because the digital display vernier can return the display to zero at any position, any plane in the measuring range can be set as a reference plane. The reference plane is typically set to the main scale jaw plane, i.e. the reference mark vertical line is aligned with the main scale jaw plane when the cursor is in the zero position. During measurement, a measured target leans against the plane of the measuring jaw of the main scale, the reference mark plate is attached to the measuring position of the measured target, the vernier is moved, the magnified reference mark vertical line and the image of the measured target are observed through the magnifier, the reference mark vertical line is aligned with the measuring position of the measured target which is also located in the field range of the magnifier, and the reading of the vernier is the distance from the measuring position of the measured target to the reference plane.

Example 3

A vernier scale with a magnifier is composed of a main scale, a vernier and a magnifier assembly. The plane of the measuring jaw of the main scale is perpendicular to the moving direction of the vernier, is aligned with the 0 scale of the main scale and is the starting position of measurement. The vernier is a digital display vernier. The magnifier assembly (see fig. 6) consists of a magnifier 601 and a reference mark measuring finger 602. The attachment means is integral with the reference mark measuring jaw. The magnifier assembly is rigidly connected to the cursor through a cursor connecting screw hole 603 on the reference mark measuring jaw and moves with the cursor. The magnifying lens is a compound lens, and the magnification is 10 times. The composite lens is a lens group consisting of a biconvex cemented lens and a monovex cemented lens. The reference mark measuring jaw (see fig. 7) has a reference mark line 701 with a line width of 0.01mm, which is parallel to the main scale measuring jaw plane. Because the digital display vernier can return the display to zero at any position, any plane in the measuring range can be set as a reference plane. The reference plane is typically set to the main scale jaw plane, i.e. the reference mark line is aligned with the main scale jaw plane when the cursor is in a zero position. During measurement, the vernier is moved, the end point of the amplified reference mark line positioned on the edge of the measuring jaw and the image of the measured target are observed through the magnifier, the reference mark line is aligned with the measured target which is also positioned in the field range of the magnifier, and the reading of the vernier is the distance from the measured target to the reference plane.

Example 4

A vernier scale with a magnifier is composed of a main scale, a vernier and a magnifier assembly. The plane of the measuring jaw of the main scale is perpendicular to the moving direction of the vernier, is aligned with the 0 scale of the main scale and is the starting position of measurement. The vernier is a digital display vernier. The magnifier assembly (see fig. 8) consists of an electronic magnifier and a reference mark measuring jaw. The attachment means is integral with the reference mark measuring jaw. The reference mark measuring jaw is provided with a reference mark line 801, and the line width of the reference mark is 0.01 mm. The electronic magnifier comprises a magnifier lens barrel 802 and a magnifier display 803, and the magnified image shot by the magnifier lens barrel is displayed on the magnifier display, so that a user does not need to make eyes close to the magnifier to observe the alignment of the reference mark and the measured object. The magnifier assembly is coupled to the vernier via coupling screw holes 804 in the reference gauge jaws. Because the digital display vernier can return the display to zero at any position, any plane in the measuring range can be set as a reference plane. The reference plane is typically set to the main scale jaw plane, i.e. the reference mark line is aligned with the main scale jaw plane when the cursor is in a zero position. During measurement, a measured target leans against the plane of the measuring jaw of the main scale, the reference mark measuring jaw is close to the measuring position on the measured target, the vernier is moved, the magnified reference mark line and the image of the measured target are observed through the magnifier display, the reference mark line is aligned with the measuring position of the measured target which is also located in the field range of the magnifier, and the reading of the vernier is the distance from the measuring position of the measured target to the reference plane.

Example 5

A vernier scale with a magnifier is composed of a main scale, a vernier and a magnifier assembly. The plane of the measuring jaw of the main scale is perpendicular to the moving direction of the vernier, is aligned with the 0 scale of the main scale and is the starting position of measurement. The magnifier assembly (see fig. 8) consists of an electronic magnifier and a reference mark measuring jaw. The attachment means is integral with the reference mark measuring jaw. The reference mark measuring jaw is provided with a reference mark line 801, and the line width of the reference mark is 0.01 mm. The electronic magnifier comprises a magnifier lens barrel 802 and a magnifier display 803, and the magnified image shot by the magnifier lens barrel is displayed on the magnifier display, so that a user does not need to make eyes close to the magnifier to observe the alignment of the reference mark and the measured object. The magnifier assembly is coupled to the vernier via coupling screw holes 804 in the reference gauge jaws. During measurement, the reference mark line is positioned at the end point of the measuring jaw edge and is aligned with the measured target. The magnifier display includes a processor. This embodiment differs from embodiment 4 in that the cursor is a digital display cursor but does not include a liquid crystal display on the digital display cursor for displaying the measured value. The magnifier display is communicated with the vernier sensor through the processor of the magnifier display, and the vernier measurement value is obtained in real time and displayed on the magnifier display. The magnifier display and the vernier capacitive grating sensor can be in communication through a wired connection (such as usb, a serial port and the like) or a wireless connection (such as wifi, 5G and the like). Thus, the liquid crystal display for displaying the measured value on the cursor is integrated on the magnifier display, and the use is more convenient. Because the digital display vernier can return the display to zero at any position, any plane in the measuring range can be set as a reference plane. The reference plane is typically set to the main scale jaw plane, i.e. the reference mark line is aligned with the main scale jaw plane when the cursor is in a zero position. During measurement, a measured target leans against the plane of the measuring jaw of the main scale, the reference mark measuring jaw is close to the measuring position on the measured target, the vernier is moved, the magnified reference mark line and the image of the measured target are observed through the magnifier display, the reference mark line is aligned with the measuring position of the measured target which is also located in the field range of the magnifier, and the reading of the upstream scale of the magnifier display is the distance from the measuring position of the measured target to the reference plane.

Claims

1. A vernier scale with a magnifier is characterized in that the vernier scale consists of a main scale, a vernier and a magnifier assembly; the magnifier assembly is rigidly connected with the vernier and moves along with the vernier; the magnifying lens assembly comprises a magnifying lens, a reference mark and a connecting piece; the reference mark is positioned in the field of view of the magnifier, and is aligned with a measured target which is also positioned in the field of view of the magnifier during measurement; the magnifier assembly is fixed on the vernier through a connecting piece.

2. A vernier scale with a magnifying lens as claimed in claim 1, wherein the magnifying lens is a single convex lens.

3. A vernier scale with a magnifying lens as claimed in claim 1, wherein the magnifying lens is a compound lens.

4. A vernier scale with a magnifying glass as claimed in claim 1, wherein the magnifying glass is an electronic magnifying glass.

5. A vernier scale with a magnifying lens as claimed in claim 1, wherein the reference mark is a marking line.

6. A vernier scale with magnifying glass as claimed in claim 1, wherein the reference mark is an arrow.

7. A vernier scale with a magnifying lens as claimed in claim 1, wherein the reference mark is located within one focal length of the field of view in front of the magnifying lens.

8. The vernier scale with magnifier according to claim 1, wherein the reference mark is aligned with the reference plane when the vernier is at zero position; the reference plane is typically the main gauge jaw plane.