Platform apparatus

Abstract

This invention relates to a platform device, comprising: a main body and a position sensing mechanism. The main body includes a base, a first movable base, a second movable base, a first moving unit, and a second moving unit. The first moving unit connects the first movable base and the base, allowing the first movable base to move relative to the base along an X-axis. The second moving unit connects the first movable base and the second movable base, allowing the second movable base to move relative to the first movable base along a Y-axis. The position sensing mechanism includes a position sensor, a position information carrier, and a viewing portion. The position sensor is disposed on the side of the second movable base facing the base and moves in tandem with it. The position information carrier is disposed on the side of the base facing the second movable base. The viewing portion is disposed on the first movable base and between the position sensor and the position information carrier, enabling the position sensor to detect the position marker on the position information carrier.

Claims

1. A platform device, comprising: A main body includes a base, a first movable seat, a second movable seat, a first moving unit, and a second moving unit. The first moving unit connects the first movable seat and the base, allowing the first movable seat to move relative to the base along an X-axis. The second moving unit connects the first movable seat and the second movable seat, allowing the second movable seat to move relative to the first movable seat along a Y-axis. The second movable seat is used for placing a load. The second movable seat, the first movable seat, and the base are stacked along a Z-axis. A position sensing mechanism includes a position sensor. A position information carrier and a viewing portion are provided. The position sensor is disposed on the side of the second movable seat facing the base and moves in tandem. The position information carrier is disposed on the side of the base facing the second movable seat. The viewing portion is disposed on the first movable seat and is located between the position sensor and the position information carrier. The viewing portion allows the position sensor to detect the position marking of the position information carrier after the second movable seat and the first movable seat move relative to each other. By reading the position information carrier, the position sensor can obtain the position information of the carrier relative to the base in the X-axis direction and the Y-axis direction. The viewing portion is a through hole, and part of the position sensor extends into the viewing portion.

2. The platform device as claimed in claim 1, wherein the cross-sectional area of ​​the location information carrier is larger than the cross-sectional area of ​​the visible portion.

3. The platform device as claimed in claim 1, wherein the cross-sectional area of ​​the location information carrier is smaller than the cross-sectional area of ​​the visible portion.

4. The platform device as claimed in claim 1, wherein the location information carrying system is positioned on the base by an adhesive.

5. The platform device as claimed in claim 4, wherein the base is recessed in a groove, and the adhesive is received in the groove.

6. The platform device according to any one of claims 1 to 5, wherein the position sensing mechanism further includes a plurality of limiting members, each of the limiting members having one end positioned on the base and the other end positioned on the position information carrier.

7. The platform device as claimed in claim 6, wherein the position information carrier can be divided into a marking area and a contact area on one side facing away from the base, the contact area being arranged around the outer edge of the marking area, and the other end of each of the limiting members pressing against the contact area.

8. The platform device as claimed in claim 1, wherein the outer contour of the position information carrier and the outer contour of the visible part have the same contour shape and are proportionally scaled to each other; the position information carrier system is positioned on the base by an adhesive; the base has a recessed groove in which the adhesive is received; the position sensing mechanism further includes a plurality of limiting members, one end of each limiting member being positioned on the base and the other end being positioned on the position information carrier; one side of the position information carrier facing away from the base can be divided into a marking area and a contact area, the contact area being arranged around the outer edge of the marking area, and the other end of each limiting member pressing against the contact area; the position information carrier system is an optical scale plate; the material of the position information carrier is... The material is selected from glass, ceramic, or metal; the outer contour of the location information carrier is square; the location information carrier has a first dimension defined in the Y-axis direction, the visible portion has a second dimension defined in the Y-axis direction, and the ratio of the first dimension to the second dimension is between 1.2 and 1.6; in the direction perpendicular to the X-axis and the Y-axis, the visible portion has a third dimension, and the depth to which the location sensor extends into the visible portion is greater than half of the third dimension; in the direction perpendicular to the X-axis and the Y-axis, the distance between the location sensor and the location information carrier has a fourth dimension defined, the fourth dimension is smaller than the third dimension, and the ratio of the fourth dimension to the third dimension is between 0.2 and 0.8.

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