Drawing compasses for classroom teaching
By designing a classroom drawing compass with a fixed distance and centering mechanism, the problem of existing compasses being unable to draw circles of precise dimensions independently has been solved, achieving accurate and stable circle drawing.
Patent Information
- Application Number
- CN202423303386.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2034-12-31
AI Technical Summary
The existing classroom compasses cannot draw circles of precise size on their own and require additional tools.
A classroom drawing compass was designed, comprising a distance-fixing mechanism, a centering mechanism, a circle-drawing mechanism, and a locking mechanism. The centering mechanism determines the center of the circle, and the distance-fixing mechanism adjusts the position of the circle-drawing mechanism to align it with the scale lines, thereby achieving accurate circle drawing.
It improves the accuracy and stability of drawing circles with a compass, ensuring the uniformity and stability of the circle-drawing process.
Smart Images
Figure CN223821348U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to compass technology field, especially relate to a classroom teaching drawing compass. BACKGROUND
[0002] The compass is the common teaching aid in classroom teaching, is used to draw circle on the blackboard and carries out teaching, but the common compass only is composed of the fixed center part and the circle drawing part, inserts the chalk in the circle drawing part, then draws the radius straight line of the circle on the blackboard with the ruler, then the fixed center part of the compass is aligned with one end of the straight line, the semicircle part is aligned with the other end of the straight line, and then the circle drawing part is completed by drawing a circle around the fixed center part.
[0003] But this kind of compass when drawing a circle, if the accurate size circle needs to be drawn, other tools need to be cooperated, leading to the accurate size circle cannot be drawn by the compass in the separate use, for this, we propose a kind of classroom teaching drawing compass that can draw accurate size circle. UTILITY MODEL CONTENT
[0004] The utility model aims at providing a classroom teaching drawing compass to solve the problems in the above background technology.
[0005] To achieve the above object, the utility model provides the following technical scheme: a classroom teaching drawing compass, comprising:
[0006] Distance mechanism, the distance mechanism is used to determine the radius of the drawn circle, the distance mechanism includes connecting frame and scale line, and the scale line is arranged at the top end of the connecting frame;
[0007] Centering mechanism, the centering mechanism is used to determine the center of the drawn circle, and a connecting mechanism is arranged between the connecting frame and the centering mechanism;
[0008] Circle drawing mechanism, the circle drawing mechanism is arranged on one side of the centering mechanism;
[0009] Locking mechanism, the locking mechanism is used for the positioning of the circle drawing mechanism and the centering mechanism.
[0010] Preferably, the centering mechanism includes a vertical bar, the bottom end of the vertical bar is fixedly connected with a fixed rod, and the bottom end of the fixed rod is fixedly connected with a centering cone.
[0011] Preferably, the connecting mechanism includes a plurality of connecting blocks, the plurality of connecting blocks are fixedly connected on one side of the connecting frame, a plurality of connecting blocks are fixedly connected with a rotating shaft, a rotating hole is formed in the outer wall of the fixed rod, and the outer wall of the rotating shaft is rotatably connected with the inner wall of the rotating hole.
[0012] Preferably, the outer wall of the rotating shaft is fitted with a rubber sleeve, and the outer wall of the rubber sleeve is configured to be interference-fitted with the inner wall of the rotating hole.
[0013] Preferably, the circle drawing mechanism includes a rotating bar and chalk, a sleeve is fixedly connected to the bottom end of the rotating bar, the chalk is inserted into the inner wall of the sleeve, and a second connecting mechanism is provided between the vertical bar and the rotating bar.
[0014] Preferably, the locking mechanism includes multiple clamping plates, which are respectively disposed on the front and back of the rotating bar. The vertical bar is fixedly connected between the multiple clamping plates. A second insertion hole is opened on the front of the vertical bar. A threaded rod is movably inserted through the inner wall of the second insertion hole. A first insertion hole is opened on the front of each of the multiple clamping plates. The outer wall of the threaded rod is movably inserted through the inner wall of each of the multiple first insertion holes. A locking nut is threaded onto the outer wall of the threaded rod.
[0015] The technical effects and advantages of this utility model are as follows:
[0016] This invention utilizes the connection frame and scale lines to determine the center of the circle to be drawn through a centering mechanism. Then, the position of the circle drawing mechanism is adjusted through a distance-fixing mechanism to determine the center of the circle to be drawn. That is, the circle drawing mechanism moves within the connection frame until it aligns with the scale line corresponding to the top of the connection frame. The circle drawing mechanism can then rotate around the centering mechanism to draw a circle, thus improving the accuracy of drawing circles with a compass. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0018] Figure 2 This utility model Figure 1 A magnified schematic diagram of the structure at point A.
[0019] Figure 3 This is a schematic cross-sectional view of the rotating shaft of this utility model.
[0020] Figure 4 This is a three-dimensional structural diagram of the rotating bar of this utility model.
[0021] Figure 5 This is a partial cross-sectional view of the rotating bar of this utility model.
[0022] In the diagram: 101, connecting frame; 102, scale line; 201, vertical bar; 202, fixing rod; 203, centering cone; 301, connecting block; 302, rotating hole; 303, rotating shaft; 304, rubber sleeve; 401, rotating bar; 402, sleeve; 403, chalk; 501, clamping plate; 601, first insertion hole; 602, threaded rod; 603, second insertion hole; 604, locking nut. DETAILED DESCRIPTION
[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0024] The utility model provides a kind of classroom teaching drawing compass as shown in Figures 1-5 The utility model provides a kind of classroom teaching drawing compass as shown in The utility model discloses a kind of classroom teaching drawing compass, including fixed distance mechanism, centering mechanism, circle drawing mechanism and locking mechanism, fixed distance mechanism is used to determine the radius of the circle drawn, fixed distance mechanism includes connecting frame 101 and scale line 102, scale line 102 is set to the top of connecting frame 101, centering mechanism is used to determine the center of the circle drawn, connecting mechanism is arranged between connecting frame 101 and centering mechanism, circle drawing mechanism is set to one side of centering mechanism, locking mechanism is used for the positioning of circle drawing mechanism and centering mechanism, the center of the circle drawn is determined by centering mechanism, then the position of circle drawing mechanism is adjusted by fixed distance mechanism to determine the center of the circle drawn, i.e. circle drawing mechanism moves in connecting frame 101, until circle drawing mechanism is aligned with the scale line 102 corresponding to the top of connecting frame 101, i.e. it can be drawn by circle drawing mechanism rotating around centering mechanism, improve the accuracy of compass circle drawing.
[0025] Among them, centering mechanism includes vertical bar 201, the bottom of vertical bar 201 is fixedly connected with fixed rod 202, the bottom of fixed rod 202 is fixedly connected with centering cone 203, by centering cone 203 against blackboard, i.e. the center of the circle drawn by compass can be determined.
[0026] Preferably, connecting mechanism includes a plurality of connecting blocks 301, a plurality of connecting blocks 301 are all fixedly connected to one side of connecting frame 101, a plurality of connecting blocks 301 are fixedly connected with rotating shaft 303, the outer wall of fixed rod 202 is provided with rotating hole 302, the outer wall of rotating shaft 303 is rotatably connected with the inner wall of rotating hole 302, by rotating shaft 303 rotating in rotating hole 302, i.e. connecting frame 101 can be rotated around the position of rotating shaft 303, the 0 scale position of scale line 102 corresponds to the tip position of centering cone 203, to ensure the accuracy of fixed distance mechanism.
[0027] Preferably, the outer wall of rotating shaft 303 is provided with rubber sleeve 304, the outer wall of rubber sleeve 304 is in interference fit with the inner wall of rotating hole 302, by the setting of rubber sleeve 304, the rotating shaft 303 rotates in rotating hole 302 will be subjected to greater friction force, i.e. when rotating shaft 303 is not subjected to larger external force, rotating shaft 303 will not automatically rotate in rotating hole 302, thereby improve the stability of the use of fixed distance mechanism.
[0028] Further, the circle drawing mechanism comprises the rotating bar 401 and the chalk 403, the bottom end of the rotating bar 401 is fixedly connected with the sleeve 402, the chalk 403 is inserted into the inner wall of the sleeve 402, the second connecting mechanism is arranged between the vertical bar 201 and the rotating bar 401, after the centering cone 203 is abutted against the blackboard, the rotating bar 401 is rotated around the centering cone 203, so that the chalk 403 can draw a circle on the blackboard.
[0029] Further, the locking mechanism comprises a plurality of clamping plates 501, the plurality of clamping plates 501 are arranged on the front surface and the back surface of the rotating bar 401 respectively, the vertical bar 201 is fixedly connected between the plurality of clamping plates 501, the front surface of the vertical bar 201 is provided with the second insertion hole 603, the inner wall of the second insertion hole 603 is movably inserted with the threaded rod 602, the front surface of the plurality of clamping plates 501 is provided with the first insertion hole 601 respectively, the outer wall of the threaded rod 602 is movably inserted with the inner wall of the plurality of first insertion holes 601 respectively, the outer wall of the threaded rod 602 is threadedly sleeved with the locking nut 604, the threaded rod 602 is inserted through the first insertion hole 601 and the second insertion hole 603, so that the centering mechanism and the circle drawing mechanism are connected, the stable use of the compasses is ensured, and when the locking nut 604 is screwed on the outer wall of the threaded rod 602, the two clamping plates 501 can clamp the rotating bar 401, so that the rotating bar 401 cannot rotate around the threaded rod 602 during the circle drawing process, the uniformity of the radius during the circle drawing process is ensured, and the stability of the circle drawing is improved.
[0030] Finally, it should be noted that: the above only for the preferred embodiments of the utility model, and does not limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features, any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the utility model, should be contained in the protection scope of the utility model.
Claims
1. A drawing compass for classroom teaching, characterized in that, include: A distance-fixing mechanism is used to determine the radius of the drawn circle. The distance-fixing mechanism includes a connecting frame (101) and a scale line (102), with the scale line (102) disposed at the top of the connecting frame (101). A centering mechanism is provided between the connecting frame (101) and the centering mechanism to determine the center of the drawn circle. A circle-drawing mechanism, wherein the circle-drawing mechanism is disposed on one side of the centering mechanism; A locking mechanism is used for positioning the circle drawing mechanism and the centering mechanism.
2. The classroom drawing compass according to claim 1, characterized in that, The centering mechanism includes a vertical bar (201), a fixed rod (202) is fixedly connected to the bottom end of the vertical bar (201), and a centering cone (203) is fixedly connected to the bottom end of the fixed rod (202).
3. A classroom drawing compass according to claim 2, characterized in that, The connecting mechanism includes multiple connecting blocks (301), each of which is fixedly connected to one side of the connecting frame (101). A rotating shaft (303) is fixedly connected between the multiple connecting blocks (301). A rotating hole (302) is provided on the outer wall of the fixing rod (202), and the outer wall of the rotating shaft (303) is rotatably connected to the inner wall of the rotating hole (302).
4. A classroom drawing compass according to claim 3, characterized in that, The outer wall of the rotating shaft (303) is fitted with a rubber sleeve (304), and the outer wall of the rubber sleeve (304) is configured to be interference fit with the inner wall of the rotating hole (302).
5. A classroom drawing compass according to claim 2, characterized in that, The circle drawing mechanism includes a rotating bar (401) and a piece of chalk (403). A sleeve (402) is fixedly connected to the bottom end of the rotating bar (401). The chalk (403) is inserted into the inner wall of the sleeve (402). A second connecting mechanism is provided between the vertical bar (201) and the rotating bar (401).
6. A classroom drawing compass according to claim 5, characterized in that, The locking mechanism includes multiple clamping plates (501), which are respectively disposed on the front and back of the rotating bar (401). The vertical bar (201) is fixedly connected between the multiple clamping plates (501). A second insertion hole (603) is opened on the front of the vertical bar (201). A threaded rod (602) is movably inserted through the inner wall of the second insertion hole (603). A first insertion hole (601) is opened on the front of each of the multiple clamping plates (501). The outer wall of the threaded rod (602) is movably inserted through the inner wall of the multiple first insertion holes (601). A locking nut (604) is threaded onto the outer wall of the threaded rod (602).