Ruler teaching aid

Abstract

The utility model relates to the technical field of school supplies, and provides a ruler teaching aid. The ruler teaching aid comprises a ruler support and a flexible transmission belt, the ruler support is provided with two rolling pieces, the two rolling pieces are rotatably connected with the ruler support, the two rolling pieces are arranged at intervals in the length direction of the ruler support, the flexible transmission belt is wound around the peripheries of the two rolling pieces, and the flexible transmission belt is connected with the ruler support. The flexible transmission belt is arranged on the ruler support so as to be driven by the two rolling pieces to transmit relative to the ruler support, and scale values are arranged on the flexible transmission belt. According to the ruler teaching aid provided by the invention, a pen is used for drawing a straight line along the edge of the flexible transmission belt, the ruler bracket is pushed, so that the rolling piece drives the flexible transmission belt to transmit, the straight line drawn by being attached to the flexible transmission belt can extend, and the straight line with the required length can be drawn by referring to the scale values on the flexible transmission belt; the structure is simple and operation is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of school supplies, and in particular to a ruler teaching aid. Background Art

[0002] At present, the rulers used in the classroom are all fixed-length rulers. When teachers write on the blackboard or students need to draw a long straight line for homework, they often need to move the ruler to draw a longer straight line to meet teaching needs. However, it is often necessary to move the ruler multiple times to splice multiple straight lines to form a long straight line, which is cumbersome, time-consuming and laborious. Utility Model Content

[0003] In order to solve the above technical problem or at least partially solve the above technical problem, the present disclosure provides a ruler teaching aid.

[0004] The present disclosure provides a ruler teaching aid, comprising a ruler bracket and a flexible transmission belt;

[0005] The ruler bracket is provided with two rolling members, the two rolling members are respectively connected to the ruler bracket for rotation, and the two rolling members are arranged at intervals along the length direction of the ruler bracket, and the flexible transmission belt is wound around the periphery of the two rolling members to be driven by the two rolling members to transmit relative to the ruler bracket;

[0006] The flexible transmission belt is provided with scale values.

[0007] Optionally, connecting shafts are respectively provided at both ends of the ruler bracket along the length direction, and the rolling member is rotatably connected to the connecting shaft, and the rolling member corresponds to the connecting shaft one by one.

[0008] Optionally, the ruler bracket includes a bracket body;

[0009] The first fixing portion and the second fixing portion are provided at both ends of the bracket body in the length direction, and the first fixing portion and the second fixing portion are provided at both ends of the bracket body in the width direction;

[0010] The connecting shaft is arranged on the first fixing portion and the second fixing portion, and the rolling element is arranged between the first fixing portion and the second fixing portion.

[0011] Optionally, the outer surface of the rolling element is spaced apart from the bracket body to form an installation gap between the rolling element and the bracket body, and the flexible transmission belt is inserted into the installation gap.

[0012] Optionally, the support body is a plate-like structure;

[0013] And / or, the first fixing portion and the second fixing portion are both extended in a direction perpendicular to the bracket body.

[0014] Optionally, the connecting shaft includes a rod body, a first abutting portion and a second abutting portion, and the rod body is arranged on the first fixing portion and the second fixing portion;

[0015] The first abutting portion is arranged at one end of the rod body, and the second abutting portion is detachably arranged at the other end of the rod body. The first abutting portion and the second abutting portion abut against one side surface of the first fixing portion and the second fixing portion away from each other, respectively.

[0016] Optionally, the rolling element is arranged to extend along the axial direction of the corresponding connecting shaft;

[0017] The rolling member is provided with a mounting through hole extending along the axial direction of the corresponding connecting shaft. The connecting shaft passes through the mounting through hole and is rotatably connected to the corresponding rolling member.

[0018] Optionally, a limiting edge is provided on one side of the ruler bracket along the width direction, an accommodation space is formed between the limiting edge and the ruler bracket, and the flexible transmission belt is arranged in the accommodation space;

[0019] An opening is formed on a side of the ruler bracket opposite to the limiting edge to expose the scale value.

[0020] Optionally, the scale value is arranged on the inner side of the flexible transmission belt and close to the outer edge of the flexible transmission belt.

[0021] Optionally, the flexible transmission belt is a rubber belt or a silicone belt;

[0022] And / or, the ruler bracket is a metal bracket or a plastic bracket;

[0023] And / or, the rolling element is a metal rolling element or a plastic rolling element.

[0024] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:

[0025] The ruler teaching aid provided by the present disclosure comprises a ruler bracket and a flexible transmission belt. Two rolling elements are arranged on the ruler bracket, the two rolling elements are respectively connected to the ruler bracket for rotation, and the two rolling elements are arranged at intervals along the length direction of the ruler bracket. By pushing the ruler bracket, the two rolling elements can start to roll at the same time. The flexible transmission belt is wound around the periphery of the two rolling elements, that is, the flexible transmission belt can be wrapped around the periphery of the two rolling elements at the same time, so that the flexible transmission belt can be driven by the rolling elements to drive relative to the ruler bracket. With the rolling of the two rolling elements, the straight line drawn by fitting the flexible transmission belt can be extended. The flexible transmission belt is provided with a scale value. A straight line is drawn along the edge of the flexible transmission belt with a pen. By pushing the ruler bracket, the rolling elements can drive the flexible transmission belt to drive, so that the ruler teaching aid is translated on a plane. By referring to the scale value on the flexible transmission belt, a straight line of a required length can be drawn. The structure is simple and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0028] Figure 1 This is a schematic structural diagram of a ruler teaching aid according to an embodiment of the utility model;

[0029] Figure 2 An exploded view of a ruler teaching aid according to an embodiment of the utility model;

[0030] Figure 3 A schematic structural diagram of a ruler teaching aid from another perspective of an embodiment of the utility model;

[0031] Figure 4 An exploded view of a ruler teaching aid from another perspective of an embodiment of the utility model;

[0032] Figure 5 It is a structural schematic diagram of a connecting shaft according to an embodiment of the utility model.

[0033] In the figure: 1. ruler bracket; 11. bracket body; 12. first fixing part; 121. first mounting hole; 13. second fixing part; 131. second mounting hole; 14. limiting edge; 15. opening; 2. flexible transmission belt; 3. rolling element; 4. connecting shaft; 41. rod body; 42. first abutting part; 43. second abutting part. DETAILED DESCRIPTION

[0034] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0035] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0036] The ruler teaching aid is described in detail below through specific embodiments:

[0037] Reference Figures 1 to 5 As shown, some embodiments of the utility model provide a ruler teaching aid, including a ruler bracket 1 and a flexible transmission belt 2, two rolling members 3 are arranged on the ruler bracket 1, the two rolling members 3 are respectively rotatably connected to the ruler bracket 1, and the two rolling members 3 are arranged at intervals along the length direction of the ruler bracket 1, and the two rolling members 3 can start rolling at the same time by pushing the ruler bracket 1, and the flexible transmission belt 2 is wound around the periphery of the two rolling members 3, that is, the flexible transmission belt 2 can be wrapped around the periphery of the two rolling members 3 at the same time, so that the flexible transmission belt 2 can be driven by the rolling members 3 to transmit relative to the ruler bracket 1, and as the two rolling members 3 roll, the straight line drawn by fitting the flexible transmission belt 2 can be extended.

[0038] In specific implementation, the flexible transmission belt 2 is provided with scale values, and a straight line is drawn along the edge of the flexible transmission belt 2 with a pen. By pushing the ruler bracket 1, the rolling element 3 can drive the flexible transmission belt 2 to transmit, so that the ruler teaching aid can be translated on the plane. By referring to the scale values ​​on the flexible transmission belt 2, a straight line of a required length can be drawn. The structure is simple and the operation is convenient.

[0039] Reference Figure 1 and Figure 2 As shown, the two ends of the ruler bracket 1 along the length direction are respectively provided with connecting shafts 4, and the rolling element 3 is rotatably connected with the connecting shaft 4, so that the rotation of the rolling element 3 drives the flexible transmission belt 2 to transmit relative to the ruler bracket 1, and the rolling element 3 corresponds to the connecting shaft 4 one by one. That is to say, the two rolling elements 3 are respectively provided at the two ends of the ruler bracket 1 along the length direction, and the flexible transmission belt 2 is wound around the periphery of the rolling elements 3 at the two ends, so that the flexible transmission belt 2 is driven to rotate by the rolling elements 3 at the two ends to transmit relative to the ruler bracket 1. It can be understood that the flexible transmission belt 2 is attached to the surface of the paper or the board of the blackboard, and pushing the ruler bracket 1 can make the flexible transmission belt 2 transmit under the action of friction so that the straight line drawn by attaching the edge of the flexible transmission belt 2 can be extended.

[0040] Of course, it should be noted that the connecting shaft 4 and the rolling element 3 can also be arranged at other positions of the ruler bracket 1, and the present disclosure does not limit this, as long as the rolling elements 3 can be arranged on the ruler bracket 1 at intervals along the length direction of the ruler bracket 1, and the flexible transmission belt 2 can be wound around the periphery of the two rolling elements 3 so that the rolling elements 3 can drive the flexible transmission belt 2 to transmit.

[0041] In some embodiments, the ruler bracket 1 includes a bracket body 11, and the first fixing portion 12 and the second fixing portion 13 are provided at both ends of the bracket body 11 along the length direction, and the first fixing portion 12 and the second fixing portion 13 are respectively arranged at both ends of the bracket body 11 along the width direction, the connecting shaft 4 is arranged on the first fixing portion 12 and the second fixing portion 13, and the rolling element 3 is arranged between the first fixing portion 12 and the second fixing portion 13, that is, the connecting shaft 4 and the rolling element 3 at both ends of the bracket body 11 are arranged on the same side of the bracket body 11.

[0042] That is, when the flexible transmission belt 2 is wound around the rollers 3 at both ends, the flexible transmission belt 2 can be located on one side of the bracket body 11, so that the flexible transmission belt 2 can be driven to transmit by pushing the bracket body 11. It can be understood that when using the ruler teaching aid provided by the present disclosure, pressing and pushing the bracket body 11 by hand can enable the bracket body 11 to move horizontally, thereby extending the straight line into a longer straight line.

[0043] In a specific implementation, the outer surface of the rolling element 3 is spaced from the bracket body 11 to form an installation gap between the rolling element 3 and the bracket body 11, and the flexible transmission belt 2 is inserted into the installation gap. It can be understood that when the flexible transmission belt 2 is sleeved on the rolling element 3, two curved segments and two straight segments are formed, and the two curved segments are respectively supported on the periphery of the two rolling elements 3, and one of the straight segments at both ends is inserted into the installation gap, that is, one is arranged close to the bracket body 11, and the other is arranged away from the bracket body 11, and is used to fit with the surface of the paper or blackboard, so that the pen can fit and draw a straight line along the edge of the flexible transmission belt 2.

[0044] In some embodiments, the bracket body 11 is a plate-like structure, and the first fixing portion 12 and the second fixing portion 13 at both ends are extended from the same side surface of the bracket body 11 in a direction perpendicular to the bracket body 11, that is, the first fixing portion 12 and the second fixing portion 13 at both ends of the bracket body 11 are arranged on the same side of the bracket body 11.

[0045] Of course, it should be noted that the bracket body 11 can also be a structure of other shapes, and the present disclosure does not limit this, as long as the rolling element 3 can rotate relative to the bracket body 11 by pushing the bracket body 11 to drive the flexible transmission belt 2 to rotate.

[0046] It should be noted that the first fixing portion 12 and the second fixing portion 13 can also be set at other positions on the bracket body 11, and the present disclosure does not limit this, as long as the flexible transmission belt 2 can be sleeved on the rolling member 3, and the rolling of the rolling member 3 drives the flexible transmission belt 2 to rotate. Specifically, the shapes of the first fixing portion 12 and the second fixing portion 13 can be specifically set according to actual needs, and the present disclosure does not limit this, as long as the connecting shaft 4 can be fixed on the first fixing portion 12 and the second fixing portion 13, and the rolling member 3 can be sleeved on the connecting shaft 4, so that the rolling member 3 can rotate relative to the connecting shaft 4, and the flexible transmission belt 2 can be driven to rotate by the rolling member 3.

[0047] In some embodiments, reference Figure 5 As shown, the connecting shaft 4 includes a rod body 41, a first abutting portion 42 and a second abutting portion 43, and the rod body 41 is arranged on the first fixing portion 12 and the second fixing portion 13. Specifically, the first abutting portion 42 is arranged at one end of the rod body 41, and the second abutting portion 43 is detachably arranged at the other end of the rod body 41, and the first abutting portion 42 and the second abutting portion 43 are respectively abutted on the side surface away from the first fixing portion 12 and the second fixing portion 13. In other words, the first abutting portion 42 abuts on the outer side surface of the first fixing portion 12 and the second fixing portion 13 away from the second, and the second abutting portion 43 abuts on the outer side surface of the second of the first fixing portion 12 and the second fixing portion 13 away from the first, so as to achieve the limitation of the position of the rod body 41.

[0048] Reference Figure 2 and Figure 4 As shown, a first mounting hole 121 is opened on the first fixing portion 12, a second mounting hole 131 is opened on the second fixing portion 13, the rod body 41 is inserted into the first mounting hole 121 and the second mounting hole 131, and the rolling element 3 can be sleeved on the rod body 41 so that the rolling element 3 can rotate with the rod body 41 as the axis.

[0049] In specific implementation, the connecting shaft 4 is inserted into the first mounting hole 121 and the second mounting hole 131 , and the rolling element 3 is sleeved on the rod body 41 and located between the first fixing portion 12 and the second fixing portion 13 , so that the rolling element 3 can rotate around the rod body 41 as the axis.

[0050] It can be understood that when installing the ruler teaching aid provided by the present invention, the rod body 41 is first inserted into one of the first mounting hole 121 and the second mounting hole 131, and the rolling element 3 is sleeved on the rod body 41, and then the rod body 41 is inserted into the other of the first mounting hole 121 and the second mounting hole 131, and finally the second abutment portion 43 is connected to the rod body 41 to limit the position of the rod body 41 and ensure the stable connection between the connecting shaft 4 and the rolling element 3.

[0051] It should be noted that, after the connection shaft 4 and the rolling element 3 are installed, the first abutting portion 42 and the second abutting portion 43 respectively abut on the surface of the side away from the first fixing portion 12 and the second fixing portion 13. Further, a recessed platform structure is formed on the surface of the side away from the first fixing portion 12 and the second fixing portion 13, and the first abutting portion 42 and the second abutting portion 43 respectively abut on the bottom of the sinking platform structure of the first fixing portion 12 and the second fixing portion 13, and the surface of the first abutting portion 42 and the second abutting portion 43 is lower than or equal to the surface of the first fixing portion 12 and the second fixing portion 13, so that the surface of the ruler teaching aid is flat.

[0052] In a specific implementation, the second abutting portion 43 may be a fastener such as a screw, and the second abutting portion 43 is threadedly connected to the rod body 41 to achieve a detachable connection between the second abutting portion 43 and the rod body 41. Specifically, the first abutting portion 42 may also be detachably fixed to the rod body 41 by means of a threaded connection or the like, which is not limited in the present disclosure and may be specifically configured according to actual needs.

[0053] It should be noted that the shapes of the first abutting portion 42 and the second abutting portion 43 are not limited in the present disclosure and can be specifically configured according to actual needs, as long as the first abutting portion 42 and the second abutting portion 43 can respectively abut on the side surfaces away from the first fixing portion 12 and the second fixing portion 13 .

[0054] Of course, the connecting shaft 4 can also be a structure of other forms, which is not limited in the present disclosure, as long as it can be fixed on the bracket body 11 and can complete the installation of the rolling element 3.

[0055] In some embodiments, the rolling member 3 is extended along the axial direction of the corresponding connecting shaft 4, and a mounting through hole extending along the axial direction of the corresponding connecting shaft 4 is provided on the rolling member 3, so that the connecting shaft 4 can be passed through the mounting through hole of the corresponding rolling member 3 and be rotatably connected with the rolling member 3.

[0056] That is, the two rolling members 3 are respectively sleeved on the connecting shafts 4 at both ends, and the rolling members 3 are rotatably connected to the connecting shafts 4. That is, the rolling members 3 are sleeved on the connecting shafts 4 and can rotate relative to the connecting shafts 4, and the flexible transmission belt 2 is wound around the periphery of the rolling members 3 at both ends to form a crawler structure, and the rolling of the rolling members 3 can drive the flexible transmission belt 2 to move relative to the paper or blackboard surface, thereby extending the straight line drawn by the flexible transmission belt to meet the use requirements.

[0057] In some embodiments, reference Figure 4As shown, a limiting edge 14 is provided on one side of the ruler bracket 1 along the width direction, and an accommodating space is formed between the limiting edge 14 and the ruler bracket 1. The flexible transmission belt 2 is arranged in the accommodating space. The limiting edge 14 can prevent the flexible transmission belt 2 from being displaced along the width direction of the ruler bracket 1.

[0058] Reference Figure 2 As shown, an opening 15 is formed on one side of the ruler bracket 1 opposite to the limiting edge 14 to expose the scale value. It can be understood that the scale value is exposed through the opening 15 so that the user can draw a straight line of a desired length by referring to the scale value through the opening 15 .

[0059] In a specific implementation, the limiting edge 14 is connected to the first fixing portions 12 at both ends of the bracket body 11 along the length direction, so that the surface of the ruler teaching aid is complete, and the flexible transmission belt 2 can abut against the limiting edge 14 to fix the position of the flexible transmission belt 2. Further, the opening 15 can be formed between the two second fixing portions 13.

[0060] Of course, it should be noted that the limiting edge 14 can also be formed between the two second fixing parts 13, and correspondingly, the opening 15 is formed between the two first fixing parts 12. The present disclosure does not limit this, as long as the user can observe the scale value through the opening 15 and draw a straight line of the required length with reference to the scale value. In specific implementation, the opening 15 can also be implemented in other structural forms and can be specifically set according to actual needs.

[0061] Reference Figure 2 and Figure 4 As shown, the flexible transmission belt 2 is arranged between the second fixed part 13 and the limiting edge 14, which can prevent the flexible transmission belt 2 from shaking along the width direction of the ruler bracket 1, so that the position of the flexible transmission belt 2 is stable. Such an arrangement can ensure that the length of the drawn straight line is more accurate.

[0062] In some embodiments, the scale value is set on the inner side of the flexible transmission belt 2 and is set close to the outer edge of the flexible transmission belt 2, that is, the scale value is set close to the position of the opening 15 for easy observation. It can be understood that the side of the flexible transmission belt 2 facing the rolling element 3 is formed as the inner side, so that when the flexible transmission belt 2 is attached to the surface of paper or blackboard, the scale value can face the human eye, so that the user can draw a straight line of a desired length with reference to the scale value.

[0063] Specifically, the scale value is set around the inner side of the flexible transmission belt 2. Of course, the scale value can also be set at other positions of the flexible transmission belt 2, and the present disclosure does not limit this, as long as the scale value on the flexible transmission belt can be seen and referenced to draw a straight line of the required length.

[0064] In specific implementation, the flexible transmission belt 2 is a rubber belt or a silicone belt. It can be understood that the rubber belt and the silicone belt can be elastically deformed to be wound around the rolling elements 3 at both ends of the ruler bracket 1. Specifically, the rubber belt and the silicone belt can be tightened on the rolling elements 3 at both ends to drive the flexible transmission belt 2 to rotate through the rolling elements 3. Of course, meshing tooth segments can also be provided on the inner side of the flexible transmission belt 2 and the outer side of the rolling element 3 to ensure that the rolling element 3 can be synchronously driven with the flexible transmission belt 2 to ensure the stability of the rotation of the flexible transmission belt 2, so that the length of the drawn straight line is more accurate.

[0065] Furthermore, the ruler bracket 1 is a metal bracket or a plastic bracket, and the rolling element 3 is a metal rolling element or a plastic rolling element. Of course, the ruler bracket 1 and the rolling element 3 can also be structures made of other materials, and the present disclosure does not limit this, as long as the rolling element 3 can be driven to rotate by the ruler bracket 1, thereby driving the flexible transmission belt 2 to rotate so that the ruler teaching aid can translate on the plane and draw a long straight line.

[0066] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0067] The above are only specific embodiments of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to these embodiments herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A ruler teaching aid, characterized in that: It comprises a ruler bracket (1) and a flexible transmission belt (2); The ruler bracket (1) is provided with two rolling elements (3), the two rolling elements (3) are respectively rotatably connected to the ruler bracket (1), and the two rolling elements (3) are arranged at intervals along the length direction of the ruler bracket (1), and the flexible transmission belt (2) is wound around the periphery of the two rolling elements (3) so as to be driven by the two rolling elements (3) to transmit relative to the ruler bracket (1); The flexible transmission belt (2) is provided with scale values, and lines can be drawn along the edge of the flexible transmission belt (2) with reference to the scale values; Connecting shafts (4) are respectively provided at both ends of the ruler bracket (1) along the length direction, the rolling element (3) is rotatably connected to the connecting shaft (4), and the rolling element (3) corresponds to the connecting shaft (4) one by one.

2. The ruler teaching aid according to claim 1, characterized in that: The ruler bracket (1) comprises a bracket body (11); A first fixing portion (12) and a second fixing portion (13) are provided at both ends of the bracket body (11) along the length direction, and the first fixing portion (12) and the second fixing portion (13) are respectively provided at both ends of the bracket body (11) along the width direction; The connecting shaft (4) is arranged on the first fixing part (12) and the second fixing part (13), and the rolling element (3) is arranged between the first fixing part (12) and the second fixing part (13).

3. The ruler teaching aid according to claim 2, characterized in that: The outer surface of the rolling element (3) is spaced apart from the bracket body (11) so as to form an installation gap between the rolling element (3) and the bracket body (11), and the flexible transmission belt (2) is passed through the installation gap.

4. The ruler teaching aid according to claim 2, characterized in that: The support body (11) is a plate-like structure; And / or, the first fixing portion (12) and the second fixing portion (13) are both extended in a direction perpendicular to the bracket body (11).

5. The ruler teaching aid according to claim 2, characterized in that: The connecting shaft (4) comprises a rod body (41), a first abutting portion (42) and a second abutting portion (43); the rod body (41) is arranged on the first fixing portion (12) and the second fixing portion (13); The first abutting portion (42) is arranged at one end of the rod body (41), and the second abutting portion (43) is detachably arranged at the other end of the rod body (41), and the first abutting portion (42) and the second abutting portion (43) respectively abut on the side surfaces of the first fixing portion (12) and the second fixing portion (13) that are away from each other.

6. The ruler teaching aid according to claim 1, characterized in that: The rolling element (3) is arranged to extend along the axial direction of the corresponding connecting shaft (4); The rolling element (3) is provided with a mounting through hole extending along the axial direction of the corresponding connecting shaft (4); the connecting shaft (4) is inserted into the mounting through hole and is rotatably connected to the corresponding rolling element (3).

7. The ruler teaching aid according to any one of claims 1 to 6, characterized in that: A limiting edge (14) is provided on one side of the ruler bracket (1) along the width direction, an accommodation space is formed between the limiting edge (14) and the ruler bracket (1), and the flexible transmission belt (2) is arranged in the accommodation space; An opening (15) is formed on a side of the ruler bracket (1) opposite to the limiting edge (14) to expose the scale value.

8. The ruler teaching aid according to any one of claims 1 to 6, characterized in that: The scale value is arranged on the inner side of the flexible transmission belt (2) and is arranged close to the outer edge of the flexible transmission belt (2).

9. The ruler teaching aid according to any one of claims 1 to 6, characterized in that: The flexible transmission belt (2) is a rubber belt or a silicone belt; And / or, the ruler bracket (1) is a metal bracket or a plastic bracket; And / or, the rolling element (3) is a metal rolling element or a plastic rolling element.

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