CN112880509A

CN112880509A - Magnifier assembly for vernier

Info

Publication number: CN112880509A
Application number: CN202110152777.XA
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: 2021-06-01

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

Magnifier assembly for vernier

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 magnifier assembly for the vernier caliper is invented. The magnifying lens assembly comprises a magnifying lens, a reference mark and a connecting piece; the magnifying lens component is fixed on the main ruler or 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, the reference mark is close to the measured target, so that the reference mark is aligned with the measured target which is also positioned in the field of view of the magnifier. Because the reference mark is close to the measured object during measurement, the distance between the reference mark and 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 an enlarged mirror assembly of example 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 a vernier with an enlarged mirror assembly of example 2

FIG. 5 is a schematic view of an enlarged mirror assembly in example 2

FIG. 6 is a schematic view of a glass reference mark plate in example 2

FIG. 7 is a schematic view of an enlarged mirror assembly in example 3

FIG. 8 is a schematic view of a reference mark measuring jaw in example 3

FIG. 9 is a schematic view of an enlarged mirror assembly in example 4

Example 1

Fig. 1 is a schematic diagram of a vernier with the magnifier assembly of this embodiment, which is composed of a main scale 101, a vernier 102 and a magnifier assembly 103. And 104 is a main ruler measuring jaw plane. The main scale measuring jaw plane 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

Fig. 4 is a schematic diagram of a vernier with the magnifier assembly of this embodiment, which is composed of a main scale 401, a vernier 402, a vernier magnifier assembly 403, and a main scale magnifier assembly 404. The main scale magnifier assembly is rigidly connected with the main scale at the head part of the main scale; the vernier magnifier component is rigidly connected with the vernier and moves along with the vernier. The magnifier assembly of this embodiment (see fig. 5) has a cylindrical main body, one end of which is a circular magnifier 501 and the other end is a circular fiducial mark plate 502. 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 fig. 6) is a round transparent glass material, is positioned in a focal length 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, a reference mark vertical line 601 and a scale mark transverse line 602 are carved on the round plane of the mark plate, and the reference mark vertical line and the reference mark transverse line are vertical to each other. The horizontal line of the reference mark is parallel to the motion direction of the cursor. 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. When the vernier and the main scale are close to each other, the vernier scale displays the minimum measurement distance. During measurement, a reference mark plate is pressed close to a measured target, a main scale magnifying lens assembly is penetrated first to enable a first measured target to be aligned with the intersection point of a main scale reference mark vertical line and a main scale reference mark transverse line, a vernier is moved, an image of the magnified vernier reference mark vertical line, the magnified reference mark transverse line and a second measured target is observed through a magnifying lens, the intersection point of the vernier reference mark vertical line and the reference mark transverse line is aligned with the second measured target which is also located in a magnifying lens view field range, and reading of a vernier is the measuring distance between the two measured targets.

Example 3

A magnifying glass assembly for a vernier (see figure 7) consists of a magnifying glass 701 and a reference mark measuring jaw 702. The attachment means is integral with the reference mark measuring jaw. The magnifier assembly is connected with the vernier or the main scale through a connecting screw hole 703 on the reference mark measuring jaw. 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. 8) has a reference mark line 801 having a line width of 0.01 mm. During measurement, the reference mark line is positioned at the end point of the measuring jaw edge and is aligned with the measured target.

Example 4

A magnifying lens assembly for a vernier (see figure 9) consists of an electronic magnifying lens 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 901, and the line width of the reference mark is 0.01 mm. The electronic magnifier comprises a magnifier lens barrel 902 and a magnifier display 903, and an enlarged 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 alignment of the reference mark and a measured target. The magnifier assembly is attached to the vernier or main scale through attachment screw holes 904 in the reference scale 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.

Example 5

A magnifying lens assembly for a vernier (see figure 9) consists of an electronic magnifying lens 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 901, and the line width of the reference mark is 0.01 mm. The electronic magnifier comprises a magnifier lens barrel 902 and a magnifier display 903, and an enlarged 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 alignment of the reference mark and a measured target. The magnifier assembly is attached to the vernier or main scale through attachment screw holes 904 in the reference scale 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 when the cursor is a digital display cursor, the magnifier display communicates with the cursor sensor through its processor to obtain the cursor measurement in real time and display it 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.

Claims

1. A magnifying glass component for a vernier is characterized in that the magnifying glass component comprises a magnifying glass, 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 magnifying lens component is fixed on the main ruler or the vernier through a connecting piece.

2. A magnifying lens assembly according to claim 1 wherein the magnifying lens is a single convex lens.

3. A magnifying lens assembly according to claim 1 wherein the magnifying lens is a compound lens.

4. A magnifying glass assembly according to claim 1, wherein the magnifying glass is an electronic magnifying glass.

5. A magnifying lens assembly according to claim 1 wherein the reference mark is a marker line.

6. A magnifying lens assembly according to claim 1 wherein the reference mark is an arrow.

7. A magnifier assembly according to claim 1, wherein the reference marks are located within one focal length of the front field of the magnifier.