WO2015066932A1 - 一种教学尺 - Google Patents

一种教学尺 Download PDF

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Publication number
WO2015066932A1
WO2015066932A1 PCT/CN2013/086947 CN2013086947W WO2015066932A1 WO 2015066932 A1 WO2015066932 A1 WO 2015066932A1 CN 2013086947 W CN2013086947 W CN 2013086947W WO 2015066932 A1 WO2015066932 A1 WO 2015066932A1
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WO
WIPO (PCT)
Prior art keywords
hole
teaching ruler
teaching
angle
strip
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Application number
PCT/CN2013/086947
Other languages
English (en)
French (fr)
Inventor
尚智
Original Assignee
邢皓宇
尚智
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 邢皓宇, 尚智 filed Critical 邢皓宇
Priority to US14/775,697 priority Critical patent/US9897427B2/en
Publication of WO2015066932A1 publication Critical patent/WO2015066932A1/zh

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B3/00—Measuring instruments characterised by the use of mechanical techniques
    • G01B3/56—Gauges for measuring angles or tapers, e.g. conical calipers
    • G01B3/563—Protractors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L13/00—Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for
    • B43L13/001—Mathematical drawing instruments
    • B43L13/002—Angle intersecting devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L13/00—Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for
    • B43L13/20—Curve rulers or templets
    • B43L13/201—Stencils for drawing figures, objects
    • B43L13/205—Stencils for drawing figures, objects geometrical figures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L7/00—Straightedges
    • B43L7/005—Straightedges combined with other drawing aids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L7/00—Straightedges
    • B43L7/027—Plural non-adjustable straightedges fixed at right angles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L7/00—Straightedges
    • B43L7/10—Plural straightedges relatively movable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L9/00—Circular curve-drawing or like instruments
    • B43L9/002—Circular curve-drawing or like instruments with perforated or marked discs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L9/00—Circular curve-drawing or like instruments
    • B43L9/005—Circular curve-drawing or like instruments with rollers or carriages
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
    • G09B23/02—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for mathematics
    • G09B23/04—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for mathematics for geometry, trigonometry, projection or perspective

Definitions

  • the utility model relates to the field of teaching tools, and more particularly to a teaching rule. ⁇ Background technique ⁇
  • the general drawing tools are: ruler, triangle and protractor, the protractor is semi-circular, the edge is marked Angled, can measure angles, can also draw arcs, circles and lines; rulers can draw straight lines; can draw right triangles and lines, etc.; triangles are generally isosceles right triangle structure or 30 degree and 60 right triangle structure, Draw isosceles right triangles, 30 degree and 60 degree right triangles, and straight lines.
  • Each teaching ruler has its own role. Often teachers need to bring multiple teaching feet when teaching, and they need to change different teaching scales when they need to draw different pictures, which is not convenient for teachers to carry and use.
  • the technical problem to be solved by the present invention is to provide a teaching rule that is convenient for the teacher to carry and use.
  • a teaching ruler the whole is a protractor, and a through hole is formed, wherein the first side and the second side intersect at a 90 degree graduation to form a first right angle, and the first side
  • the angle between the straight side of the teaching ruler is 45 degrees
  • the third side and the fourth side of the through hole intersect at a 60 degree or 120 degree mark to form a second right angle, and the third side and the straight side The angle is 60 degrees.
  • the extension lines of the second side and the fourth side intersect. This way, you can draw two right-angled edges directly when drawing a 45-degree right-angled triangle or 30-degree and 60-degree right-angled triangles. You don't need to add a right-angled edge. You can draw only the oblique edges, which is convenient to use.
  • the intersection is integrally provided with the teaching ruler such that the through hole forms a first through hole and a second through hole of a triangular structure.
  • the first acute angle of the first through hole and the second acute angle of the second through hole are respectively located at both ends of the straight side. In this way, the two sides of the first through hole and the second through hole are set to the maximum extent, so that the drawn figure is larger and convenient to use.
  • the third acute angle of the first through hole and the fourth acute angle of the second through hole are all arranged in an arc structure. This arrangement increases the joint area of the third acute angle and the fourth acute angle, thereby increasing the robustness of the teaching rule.
  • the straight side is marked with a scale.
  • This teaching ruler can be used as a ruler.
  • the teaching ruler further comprises a shape-shaped through hole and a fixing hole disposed at one end of the strip-shaped through hole; the teaching ruler further comprises a fixing body fixed on the side wall of the strip-shaped through hole A fixed slider for placing a placement hole of a chalk, the fixed slider being slidable on a sidewall of the strip through hole.
  • the teaching ruler can be adjusted to adjust the fixed slider to draw different sizes.
  • the strip-shaped through holes are provided with opposite serrations on both sides.
  • the two sides of the strip through hole are provided with opposite serrations for fixing the slider, which is convenient for use.
  • the fixing hole is a circular hole.
  • the fixing member in which the circular structure is inserted into the fixing hole is better fixed, and can be fixed by using chalk.
  • the teaching ruler is transparently disposed.
  • the transparent settings show the parts that need to be added for easy drawing.
  • the utility model can draw and measure the angle because the teaching ruler is a protractor; the first side and the second side of the through hole of the teaching ruler intersect at a 90-degree scale to form a first right angle, and the first side and the straight edge of the teaching ruler are clipped.
  • the angle is 45 degrees, the first side, the second side and the straight side are drawn in chalk, and then the equalizer triangle is used to form a isosceles right triangle; the third and fourth sides of the through hole intersect at 60 degrees.
  • a second right angle is formed at a 120-degree scale, and the angle between the third side and the straight side is 60 degrees, and the third side, the fourth side, and the straight side are drawn by chalk, and then the teaching ruler is used to complete the formation.
  • the 30-degree, 60-degree right-angled triangle thus the teaching ruler can also be used as a triangular plate, which is convenient to carry when the teacher teaches; and also does not need to frequently change different teaching rulers when used, and is convenient to use. And this teaching rule can also be used to produce miniature students or teachers.
  • FIG. 1 is a schematic structural view of a teaching ruler according to an embodiment of the present invention.
  • FIG. 2 is another schematic structural view of a teaching ruler according to an embodiment of the present invention.
  • the utility model discloses a teaching ruler, which is generally a protractor. As shown in FIG. 1 and FIG. 2, a through hole is formed, wherein the first side 1 and the second side 2 intersect at a 90 degree graduation to form a first right angle, and the first The angle between the edge 1 and the straight edge 6 of the teaching ruler is 45 degrees; the third side 3 and the fourth side 4 of the through hole intersect at a 60 degree or 120 degree mark to form a second right angle, and the third side 3 is at an angle of 60 degrees to the straight edge 6.
  • the utility model can draw and measure the angle because the teaching ruler is a protractor; the first side 1 and the second side 2 of the through hole of the teaching ruler intersect at a 90 degree mark to form a first right angle, and the first side 1 and the teaching ruler line
  • the angle of the edge 6 is 45 degrees, and the first side 1, the second side 2 and the straight side 6 are drawn in chalk, and then the heel triangle is formed by the addition of the teaching ruler; the third side of the through hole 3 And the fourth side 4 intersects at a 60 degree or 120 degree scale to form a second right angle, and the angle between the third side 3 and the straight side 6 is 60 degrees, and the third side 3, the fourth side 4, and the straight line are drawn by chalk.
  • the circumference of one side surface of the arc side 5 of the teaching ruler is marked with a scale, thereby facilitating the drawing of the circle and the measurement of the angle.
  • the extension lines of the second side 2 and the fourth side 4 intersect at the intersection point 8, so that the painting is set
  • the straight edge 6 is marked with a scale, so that the teaching ruler can be used as a ruler, which is convenient to use, and does not need to carry a ruler.
  • the scale on the side of the line and the scale on the side of the arc are on the same side.
  • the intersection of the second side 2 and the fourth side 4, that is, the intersection point 8 is integrally provided with the teaching ruler, so that the through hole forms the first through hole 10 and the second pass of the triangular structure.
  • the hole 11 thus increases the strength of the teaching ruler.
  • the first acute angle of the first through hole 10 and the second acute angle of the second through hole 11 are respectively located at both ends of the straight side 6 of the teaching ruler, so that two of the right angles of the two right angles can be set to the maximum, that is, the first side
  • the maximum setting of 1 and 3 sides 3 makes the drawn graphics larger and easier to use.
  • the third acute angle of the first through hole 10 and the fourth acute angle of the second through hole 11 are both arranged in an arc shape, that is, the two opposite acute angles of the first through hole 10 and the second through hole 11 at the intersection 8 are set.
  • the curved structure increases the area of the joint between the two, thereby increasing the firmness of the teaching ruler, and is arranged in an arc-shaped structure without corners for easy handling; of course, the first right angle, the second right angle, the first acute angle and The second acute angle can also be set to an arc structure, which also increases the strength of the teaching ruler and facilitates handling.
  • the teaching ruler further has a strip-shaped through hole 12 having a width slightly larger than a chalk and a fixing hole 9 disposed at the end of the strip-shaped through hole 12; the teaching ruler further includes a fixing A fixing slider 7 for fixing the placement hole of the chalk is disposed on the side wall of the strip through hole 12, and the fixing slider 7 can slide on the side wall of the strip through hole 12, and the fixing slider 7 is replaced in the strip shape as needed.
  • the position on the side wall of the through hole 12 is such that a certain object (like a readily available pen, chalk, etc.) is inserted into the fixing hole 9 as a center, and the chalk is inserted into the position of the fixing hole of the fixed slider 7, so that a circle can be realized. Drawing.
  • the fixing hole 9 has a circular structure, which facilitates the insertion and cooperation of chalk, pen and the like, as well as the convenience of drawing a circle and reducing the resistance.
  • the fixing hole 9 is located at the right end of the strip-shaped through hole 12, that is, the user faces the right end of the scale on the side of the teaching ruler, so that the setting is convenient for drawing a circle; of course, it is also feasible to set it at the left end.
  • the two sides of the strip through hole 12 are provided with opposite serrations for limiting and fixing the fixed slider 7.
  • the serrations on both sides of the strip through hole 12 are completely symmetrically arranged, and the serration is Comb serrated.
  • the material of the teaching ruler of the utility model can be transparently arranged by using a plastic material, so that it is convenient to see the parts that need to be supplemented when drawing, and it is convenient for drawing, which is advantageous for use. Of course, other transparent materials can also be used.
  • the utility model can also be produced into a small structure for use by students or teachers. You don't have to carry too many teaching feet. You only need this one ruler, which is convenient to use and carry.

Abstract

一种教学尺，整体为量角器，设有第一边（1）与第二边（2）相交于90度刻度处形成第一直角的通孔，且第一边（1）与教学尺的直线边（6）的夹角为45度；所述通孔的第三边（3）和第四边（4）相交于60度或120度刻度处形成第二直角，且所述第三边（3）与所述直线边（6）的夹角为60度。该教学尺既可以作为量角器画及测量角度，还可以通过第一边（1）、第二边（2）、第三边（3）、第四边（4）及直线边（6）画出等腰直角三角形以及30度、60度的直角三角形，以及作为三角板使用。

Description

一种教学尺
【技术领域】
本实用新型涉及教学用具领域， 更具体的说， 涉及一种教学尺。 【背景技术】
在教学过程中， 教师通常需要在黑板上写字和画图； 字直接用粉笔写， 图 需要用工具画， 一般的画图工具有： 直尺、 三角板和量角器等， 量角器为半圓 形结构， 边缘标有角度， 可以测量角度， 还可以画弧线、 圓以及直线； 直尺可 画直线； 可画直角三角形和直线等； 三角板一般为等腰直角三角形结构或 30度 和 60的直角三角形结构， 可画等腰直角三角形、 30度和 60度直角三角形以及 直线等。 每个教学尺都有各自的作用， 常常教师在教学时需要带上多个教学尺， 而且在需要画不同图的时候需要更换不同的教学尺， 从而就不方便教师携带和 使用。
【发明内容】
本实用新型所要解决的技术问题是提供一种方便教师携带和使用的教学 尺。
本实用新型的目的是通过以下技术方案来实现的： 一种教学尺， 整体为量 角器， 设有第一边与第二边相交于 90度刻度处形成第一直角的通孔， 且第一边 与教学尺的直线边的夹角为 45度； 所述通孔的第三边和第四边相交于 60度或 120度刻度处形成第二直角， 且所述第三边与所述直线边的夹角为 60度。
优选的， 所述第二边和第四边的延长线相交。 这样设置在画 45度直角三角 形或 30度和 60度直角三角形时可直接画出两条直角边， 不需再补充直角边， 仅画出斜边即可， 方便使用。
优选的， 所述相交处与教学尺一体设置使所述通孔形成三角形结构的第一 通孔和第二通孔。 增加教学尺的强度。 优选的， 所述第一通孔的第一锐角及第二通孔的第二锐角分别位于所述直 线边的两端处。 这样设置最大限度的设置第一通孔及第二通孔的两个边， 从而 使画出的图形更大， 方便使用。
优选的， 所述第一通孔的第三锐角及第二通孔的第四锐角都设置成弧形结 构。 这样设置使第三锐角及第四锐角的连接处面积增大， 从而增加教学尺的牢 固性。
优选的， 所述直线边上标有刻度。 这样此教学尺可当直尺使用。
优选的， 所述教学尺上还设有一条形通孔和设置在所述条形通孔一端的固 定孔； 所述教学尺还包括一固定在所述条形通孔侧壁上的设有用于固定放置粉 笔的放置孔的固定滑块， 所述固定滑块可在所述条形通孔侧壁上滑动。 这样设 置教学尺可根据需求调节固定滑块， 从而画不同大小圓。
优选的， 所述条形通孔的两侧边上设有相对的锯齿。 条形通孔的两侧设置 相对的锯齿对滑块有固定作用， 方便使用。
优选的， 所述固定孔为圓形孔。 这样设置固定孔内插入圓形结构的固定物 固定效果更好， 可采用粉笔进行固定。
优选的， 所述教学尺透明设置。 透明设置可看到需要补充的部分， 方便画 图。
本实用新型由于教学尺为量角器可画及测量角度； 教学尺的通孔的第一边 和第二边相交于 90度刻度处形成第一直角， 且第一边与教学尺的直线边的夹角 为 45度， 用粉笔画出第一边、 第二边及直线边， 再用此教学尺补充完整就形成 了一等腰直角三角形； 通孔的第三边和第四边相交于 60度或 120度刻度处形成 第二直角， 且第三边与直线边的夹角为 60度， 用粉笔画出第三边、 第四边及直 线边， 再用此教学尺补充完整就形成了一 30度、 60度的直角三角形； 从而此教 学尺还能够当三角板使用， 在教师教学时就方便携带； 而且在使用时也不需要 经常更换不同的教学尺， 方便使用。 且此教学尺也可以生产微型的方便学生或 教师使用。 【附图说明】
图 1是本实用新型实施例教学尺的结构示意图；
图 2是本实用新型实施例教学尺的另一结构示意图。
其中： 1、 第一边； 2、 第二边； 3、 第三边； 4、 第四边； 5、 弧线边； 6、 直线边； 7、 固定滑块； 8、 交点； 9、 固定孔； 10、 第一通孔； 11、 第二通孔； 12、 条形通孔。
【具体实施方式】
下面结合附图和较佳的实施例对本实用新型作进一步说明。
本实用新型公开一种教学尺， 整体为量角器， 如图 1和图 2所示， 设有第一 边 1与第二边 2相交于 90度刻度处形成第一直角的通孔， 且第一边 1与教学尺 的直线边 6的夹角为 45度；所述通孔的第三边 3和第四边 4相交于 60度或 120 度刻度处形成第二直角， 且所述第三边 3与所述直线边 6的夹角为 60度。 本实 用新型由于教学尺为量角器可画及测量角度； 教学尺的通孔的第一边 1 和第二 边 2相交于 90度刻度处形成第一直角， 且第一边 1与教学尺的直线边 6的夹角 为 45度， 用粉笔画出第一边 1、 第二边 2及直线边 6, 再用此教学尺补充完整 就形成了一等腰直角三角形； 通孔的第三边 3和第四边 4相交于 60度或 120度 刻度处形成第二直角， 且第三边 3与直线边 6的夹角为 60度， 用粉笔画出第三 边 3、 第四边 4及直线边 6, 再用此教学尺补充完整就形成了一 30度、 60度的 直角三角形； 从而此教学尺还能够当三角板使用， 在教师教学时就方便携带； 而且在使用时也不需要经常更换不同的教学尺， 方便使用。 且此教学尺也可以 生产微型的方便学生或教师使用。
本实施例中， 教学尺的弧线边 5的一侧表面周围标记有刻度， 从而便于画圓 以及测量角度。
如图 1所示， 第二边 2和第四边 4的延长线相交于交点 8处， 这样设置在画 45度直角三角形或 30度和 60度直角三角形时可直接画出两条直角边， 不需要 再补充直角边， 仅画出斜边即可， 方便使用。
如图 1所示， 直线边 6上标有刻度， 从而此教学尺可当直尺使用， 不仅方便 使用， 而且不用携带直尺， 方便。 且直线边上的刻度和弧线边的刻度在同一面。
作为本实施例的进一步改进， 如图 2所示， 第二边 2和第四边 4相交处， 即 交点 8与教学尺一体设置使通孔形成三角形结构的第一通孔 10和第二通孔 11 , 从而就增加了教学尺的强度。 第一通孔 10的第一锐角及第二通孔 11的第二锐 角分别位于教学尺的直线边 6 的两端处， 从而两个直角的其中两个直角边能够 设置最大， 即第一边 1和第三边 3最大限度的设置， 进而使画出的图形更大， 方便使用。 第一通孔 10的第三锐角及第二通孔 11的第四锐角都设置成弧形结 构， 即交点 8处的第一通孔 10和第二通孔 11的两个相对的锐角都设置成弧形 结构， 使两者连接处的面积增大， 从而增加教学尺的牢固性， 而且设置成弧形 结构无棱角， 方便拿放； 当然， 第一直角、 第二直角、 第一锐角及第二锐角也 都可以设置成弧形结构， 这样设置同样增加教学尺的强度以及方便拿放。
如图 1和图 2所示， 教学尺上还设有一宽度稍大于一个粉笔的直径的条形通 孔 12和设置在此条形通孔 12—端的固定孔 9;教学尺还包括一固定在条形通孔 12侧壁上的设置有用于固定放置粉笔的放置孔的固定滑块 7, 固定滑块 7可在 条形通孔 12侧壁上滑动， 根据需要更换固定滑块 7在条形通孔 12侧壁上的位 置， 这样随意用某一物 （像随手可取的笔杆、 粉笔等）插入固定孔 9 中作为圓 心， 将粉笔插入固定滑块 7 的放置孔位置， 就可以实现圓的作图。 此固定孔 9 为圓形结构， 从而方便粉笔、 笔杆等的插入和配合， 以及方便画圓， 减小阻力。 本实施例固定孔 9位于条形通孔 12的右端， 即使用者面对教学尺一面标有刻度 的右端， 这样设置方便画圓； 当然， 设置在左端也是可行的。
在本实施例中， 条形通孔 12 的两侧边上设有相对的锯齿以便对固定滑块 7 进行限位、 固定， 条形通孔 12两侧的锯齿完全对称设置， 而且该锯齿为梳状锯 齿。 本实用新型教学尺的材料可采用塑料材料进行透明设置， 从而在作图时方便 看到需要补充的部分， 方便画图， 有利于使用。 当然， 也可以采用其它透明材 料。
本实用新型也可生产成小型结构供学生或教师使用。 不必携带过多教学尺， 仅需此一个教学尺即可， 方便使用和携带。
以上内容是结合具体的优选实施方式对本实用新型所作的进一步详细说明， 不能认定本实用新型的具体实施只局限于这些说明。 对于本实用新型所属技术 领域的普通技术人员来说， 在不脱离本实用新型构思的前提下， 还可以做出若 干筒单推演或替换， 都应当视为属于本实用新型的保护范围。

Claims

权利要求
1、 一种教学尺， 整体为量角器， 其特征在于， 设有第一边与第二边相交于 90度刻度处形成第一直角的通孔， 且第一边与教学尺的直线边的夹角为 45度； 所述通孔的第三边和第四边相交于 60度或 120度刻度处形成第二直角， 且所述 第三边与所述直线边的夹角为 60度。
2、 如权利要求 1所述的教学尺， 其特征在于， 所述第二边和第四边的延长 线相交。
3、 如权利要求 2所述的教学尺， 其特征在于， 所述相交处与教学尺一体设 置使所述通孔形成三角形结构的第一通孔和第二通孔。
4、 如权利要求 3所述的教学尺， 其特征在于， 所述第一通孔的第一锐角及 第二通孔的第二锐角分别位于所述直线边的两端处。
5、 如权利要求 4所述的教学尺， 其特征在于， 所述第一通孔的第三锐角及 第二通孔的第四锐角都设置成弧形结构。
6、 如权利要求 1至 5任一所述的教学尺， 其特征在于， 所述直线边上标有 刻度。
7、 如权利要求 1至 5任一所述的教学尺， 其特征在于， 所述教学尺上还设 有一条形通孔和设置在所述条形通孔一端的固定孔； 所述教学尺还包括一固定 在所述条形通孔侧壁上的设有用于固定放置粉笔的放置孔的固定滑块， 所述固 定滑块可在所述条形通孔侧壁上滑动。
8、 如权利要求 7所述的教学尺， 其特征在于， 所述条形通孔的两侧边上设 有相对的锯齿。
9、 如权利要求 7所述的教学尺， 其特征在于， 所述固定孔为圓形孔。
10、 如权利要求 1至 5任一所述的教学尺， 其特征在于， 所述教学尺透明 设置。
PCT/CN2013/086947 2013-11-08 2013-11-12 一种教学尺 WO2015066932A1 (zh)

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