Drawing instrument for mathematical blackboard writing

Abstract

The utility model discloses a drawing instrument for mathematical writing on a blackboard, the drawing instrument for mathematical writing on the blackboard comprises a focus fixing assembly, a holding assembly and a drawing assembly, in order to solve the problem that in the prior art, it is difficult for a common drawing instrument to draw oval graphs on a blackboard, the focus fixing assembly and a limiting cable are designed, through cooperative use of the focus fixing assembly and the limiting cable, the focus fixing assembly is adopted to represent the focus of an ellipse, the limiting cable is adopted to limit an ellipse pattern track, ellipses can be conveniently drawn on a blackboard, meanwhile, the length of the limiting cable can be conveniently adjusted, ellipses of different shapes can be conveniently drawn, and furthermore, the ellipses can be conveniently drawn. In order to avoid the phenomenon that in the drawing process, due to the fact that the operation force of a user is too large, the chalk is broken, a drawing assembly is further designed, drawing can be effectively conducted on the blackboard through the drawing assembly, and the phenomenon that the chalk is broken due to the fact that the force is too large can be avoided.

Description

Technical Field

[0001] The present application relates to the technical field of mathematical drawing, in particular to a drawing device for mathematical blackboard writing. Background Art

[0002] Mathematical drawing tools are an indispensable part of mathematics learning and teaching. They help people understand and display mathematical concepts and graphs more intuitively. They play an important role in mathematics learning and teaching, helping students better understand and master mathematical knowledge.

[0003] The existing patent document "CN209794998U A Mathematical Drawing Tool" discloses a drawing tool. Although the above-mentioned drawing tool can draw arc patterns, it is difficult to draw when it is necessary to draw a whole ellipse, and it is also impossible to draw ellipse patterns of different shapes.

[0004] That is, the prior art has the following technical problem: ordinary drawing tools are difficult to draw the entire ellipse and ellipse patterns of different shapes. Therefore, a drawing device for mathematics blackboard writing is proposed to solve the above problem. Summary of the invention

[0005] In this embodiment, a drawing device for mathematics blackboard writing is provided to solve the problem that ordinary drawing tools in the prior art are difficult to draw a whole ellipse and ellipse patterns of different shapes.

[0006] According to one aspect of the present application, a drawing apparatus for a mathematics blackboard is provided, and the drawing apparatus for a mathematics blackboard comprises:

[0007] A focus fixing component, wherein two focus fixing components are provided, a limiting cable is connected between the two focus fixing components, the focus fixing component can be adsorbed and fixed on the blackboard, and the focus fixing component can adjust the length of the limiting cable;

[0008] A gripping assembly, the gripping assembly being disposed on the limiting cable and slidingly engaged with the limiting cable;

[0009] A drawing component is fixedly arranged on the holding component, and the drawing component can draw lines on the blackboard when the holding component moves.

[0010] Furthermore, the focus fixing assembly includes an adsorption fixing disk, a rotating table, a circular shell, a winding disk, a locking round block, a limiting hole and a fixed shell. The adsorption fixing disk can be adsorbed and fixed on the blackboard. The outer wall of the adsorption fixing disk is rotatably connected to the rotating table, and the circular shell is fixedly connected to the rotating table.

[0011] Furthermore, the adsorption fixing disk is a magnetic circular plate.

[0012] Furthermore, the adsorption fixing plate is a fixed suction cup.

[0013] Furthermore, an inner cavity is provided inside the circular shell, a winding drum is rotatably connected in the inner cavity of the circular shell, one end of the limiting cable extends into the inner cavity of the circular shell and is connected to the winding drum, a locking round block is rotatably connected at the outer wall of the circular shell, and the locking round block is fixedly connected to the winding drum.

[0014] Furthermore, a plurality of limiting holes are provided on the arc surface of the locking circular block, a fixed shell is fixedly connected to the side wall of the circular shell, a movable plate is slidably connected to the outer surface of the fixed shell, an inner cavity is provided inside the fixed shell, a slider is slidably connected in the inner cavity of the fixed shell, the slider is fixedly connected to the movable plate, a locking pin is fixedly connected to the upper surface of the slider, one end of the locking pin extends to the inside of the limiting hole, one end of a limiting spring is fixedly connected to the bottom surface of the slider, and the other end of the limiting spring is fixedly connected to the bottom wall of the inner cavity of the fixed shell.

[0015] Furthermore, the holding assembly includes a frustum, a limiting cylinder, a cover plate, a holding portion and a circular plate, the side wall of the frustum is rotatably connected to one end of two limiting cylinders, the two limiting cylinders are rotatably connected to the circular plate, and the limiting cable passes between the two limiting cylinders.

[0016] Furthermore, the drawing assembly includes a support rod, a ball, a fixed sleeve, a movable sleeve, a locking bolt and chalk, and three support rods are provided. The three support rods are equidistantly fixed on the side wall of the circular plate in a ring shape.

[0017] Furthermore, a groove is provided at the front end of the support rod, and a ball is rotatably connected to the groove at the front end of the support rod.

[0018] Furthermore, a fixed sleeve is fixedly provided at the center position of the circular plate, a movable sleeve is slidably connected to the inner cavity of the fixed sleeve, a chalk is inserted into the inner cavity of the movable sleeve, a locking bolt is threadedly connected to the side wall of the movable sleeve, one end of the locking bolt presses against the chalk, one end of a spring is fixedly connected to the inner cavity of the fixed sleeve, and the other end of the spring is fixedly connected to one end of the movable sleeve.

[0019] Furthermore, a gripping portion is fixedly connected to the side wall of one side of the cover plate, a circular protrusion is fixedly connected to the side wall of the other side of the cover plate, an inner cavity is provided inside the truncated cone, the circular protrusion extends into the inner cavity of the truncated cone, one end of a plurality of connecting springs is fixedly provided on the arc-shaped wall of the circular protrusion, and the other ends of the plurality of connecting springs are fixedly connected to the inner cavity wall of the truncated cone.

[0020] Through the above-mentioned embodiments of the present application, the interior of the helmet body can be auxiliary heated by the auxiliary heating structure, and continuous heating can be performed during riding, so that the warmth retention effect is better, and the problem of too cold air entering the head during riding is solved. The windproof enclosure structure can be used to enclose and protect the wearer's neck from wind, further improving the warmth retention effect. At the same time, it is easy to fix and has a good waterproof effect. It is suitable for use in rainy and snowy weather, and solves the problem of no protection at the neck position during riding. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application 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, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present application;

[0023] Figure 2 This is a front structural schematic diagram of an embodiment of the present application;

[0024] Figure 3 This is a schematic structural diagram of a focus fixing component according to an embodiment of the present application;

[0025] Figure 4 This is a schematic diagram of the internal structure of a focus fixing component according to an embodiment of the present application;

[0026] Figure 5 This is a front internal schematic diagram of a focus fixing assembly according to an embodiment of the present application;

[0027] Figure 6 A schematic diagram of the structure of a drawing component according to an embodiment of the present application;

[0028] Figure 7 This is an internal schematic diagram of a drawing component according to an embodiment of the present application;

[0029] Figure 8 This is a schematic diagram of the side structure of a grip assembly according to an embodiment of the present application;

[0030] Fig. 9 This is a schematic diagram of the internal structure of a grip assembly according to an embodiment of the present application.

[0031] In the figure:

[0032] Focus fixing assembly 1, adsorption fixing plate 101, rotating table 102, circular shell 103, winding disk 104, locking round block 105, limiting hole 106, fixed shell 107, moving plate 108, slider 109, locking pin 110, limiting spring 111;

[0033] Define cable 2;

[0034] Grip assembly 3, round table 301, limiting cylinder 302, cover plate 303, gripping portion 304, round protrusion 305, connecting spring 306, round plate 307;

[0035] Drawing component 4, support rod 401, ball 402, fixed sleeve 403, movable sleeve 404, locking bolt 405, chalk 406, spring 407. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0037] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0038] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0039] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0040] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] See also Figure 1-9 As shown, a drawing device for mathematics blackboard writing, the drawing device for mathematics blackboard writing comprises:

[0042] A focus fixing component 1, wherein two focus fixing components 1 are provided, a limiting cable 2 is connected between the two focus fixing components 1, the focus fixing component 1 can be adsorbed and fixed on the blackboard, and the focus fixing component 1 can adjust the length of the limiting cable 2;

[0043] A gripping assembly 3, wherein the gripping assembly 3 is disposed on the limiting cable 2 and is slidably matched with the limiting cable 2;

[0044] A drawing component 4, wherein the drawing component 4 is fixedly arranged at the holding component 3, and the drawing component 4 can draw lines on the blackboard when the holding component 3 moves;

[0045] Through the above technical solution, by using the focus fixing component 1 and the limiting cable 2 in coordination, the focus fixing component 1 is used to represent the focus of the ellipse, and the limiting cable 2 is used to limit the trajectory of the ellipse graphic, so that the ellipse can be conveniently drawn on the blackboard, and the length of the limiting cable 2 can be conveniently adjusted to facilitate drawing ellipses of different shapes. Furthermore, in order to avoid the phenomenon of chalk breaking due to excessive force applied by the user during the drawing process, the present application further designs a drawing component 4. Through the setting of the drawing component 4, it is possible to effectively draw on the blackboard, and the phenomenon of chalk breaking caused by excessive force can be avoided.

[0046] The focus fixing assembly 1 includes an adsorption fixing disk 101, a rotating platform 102, a circular shell 103, a winding disk 104, a locking round block 105, a limiting hole 106 and a fixed shell 107. The adsorption fixing disk 101 can be adsorbed and fixed on the blackboard. The outer wall of the adsorption fixing disk 101 is rotatably connected to the rotating platform 102, and the circular shell 103 is fixedly connected to the rotating platform 102.

[0047] The adsorption fixing disk 101 is a magnetic circular plate;

[0048] The adsorption fixing plate 101 is a fixed suction cup;

[0049] The circular shell 103 is provided with an inner cavity, and a winding disk 104 is rotatably connected in the inner cavity of the circular shell 103. One end of the limiting cable 2 extends into the inner cavity of the circular shell 103 and is connected to the winding disk 104. A locking round block 105 is rotatably connected to the outer wall of the circular shell 103. The locking round block 105 is fixedly connected to the winding disk 104. According to the technical solution, the winding disk 104 can be driven to rotate by manually rotating the locking round block 105, and then the limiting cable 2 can be wound up by the rotation of the winding disk 104, thereby realizing the function of controlling the length of the limiting cable 2.

[0050] A plurality of limiting holes 106 are provided on the arc surface of the locking round block 105, a fixed shell 107 is fixedly connected to the side wall of the circular shell 103, a movable plate 108 is slidably connected to the outer surface of the fixed shell 107, an inner cavity is provided inside the fixed shell 107, a slider 109 is slidably connected in the inner cavity of the fixed shell 107, the slider 109 is fixedly connected to the movable plate 108, a locking pin 110 is fixedly connected to the upper surface of the slider 109, one end of the locking pin 110 extends to the inside of the limiting hole 106, one end of the limiting spring 111 is fixedly connected to the bottom surface of the slider 109, and the limiting spring 111 is fixedly connected to the bottom surface of the slider 109. The other end is fixedly connected to the bottom wall of the inner cavity of the fixed shell 107. Through the technical solution, the locking block 105 can be locked and fixed by the limiting locking function of the locking pin 110, so as to lock and fix the winding drum 104. When it is necessary to adjust the length of the limited cable 2, the movable plate 108 can be manually moved, so that the slider 109 is driven to move by the movable plate 108, and then the locking pin 110 is driven to move, so that the locking pin 110 is separated from the limiting hole 106, and then the winding drum 104 can be rotated by rotating the locking block 105, so as to adjust the length of the limited cable 2, so as to facilitate drawing ellipses of different shapes;

[0051] The holding assembly 3 includes a truncated cone 301, a limiting cylinder 302, a cover plate 303, a holding portion 304 and a circular plate 307. The side wall of the truncated cone 301 is rotatably connected to one end of two limiting cylinders 302. Both of the two limiting cylinders 302 are rotatably connected to the circular plate 307. The limiting cable 2 passes through between the two limiting cylinders 302. Through the technical solution, when it is necessary to draw an ellipse, the user holds the holding assembly 3, tightens the limiting cable 2, and rotates along the tightened limiting cable 2, thereby drawing an elliptical figure.

[0052] The drawing assembly 4 includes a support rod 401, a ball 402, a fixed sleeve 403, a movable sleeve 404, a locking bolt 405 and a chalk 406. The support rods 401 are provided with three, and the three support rods 401 are equidistantly fixed in a ring shape on the side wall of the circular plate 307; a groove is provided at the front end of the support rod 401, and the ball 402 is rotatably connected to the groove at the front end of the support rod 401;

[0053] A fixed sleeve 403 is fixedly provided at the center position of the circular plate 307, a movable sleeve 404 is slidably connected in the inner cavity of the fixed sleeve 403, a chalk 406 is inserted in the inner cavity of the movable sleeve 404, a locking bolt 405 is threadedly connected at the side wall of the movable sleeve 404, one end of the locking bolt 405 presses against the chalk 406, one end of a spring 407 is fixedly connected in the inner cavity of the fixed sleeve 403, and the other end of the spring 407 is fixedly connected to one end of the movable sleeve 404. According to the technical solution, when the user draws, by holding the holding component 3 and bringing the ball 402 into contact with the blackboard, the chalk 406 also contacts the surface of the blackboard under the elastic action of the spring 407, so that the movement of the holding component 3 can drive the chalk 406 to move and keep it perpendicular to the blackboard to draw lines, thereby effectively avoiding the phenomenon of excessive force breakage caused by direct use of chalk;

[0054] A gripping portion 304 is fixedly connected to one side wall of the cover plate 303, and a circular protrusion 305 is fixedly connected to the other side wall of the cover plate 303. An inner cavity is provided inside the truncated platform 301, and the circular protrusion 305 extends into the inner cavity of the truncated platform 301.

[0055] One end of a plurality of connecting springs 306 is fixedly arranged on the arc-shaped wall of the circular protrusion 305, and the other end of the plurality of connecting springs 306 is fixedly connected to the inner cavity wall of the truncated table 301. Through the technical solution, the user holds the holding portion 304 to move and draw a pattern. At the same time, through the setting of the connecting springs 306, while tensioning the limiting cable 2, the phenomenon of loosening and breaking of the limiting cable 2 caused by excessive force can be avoided, thereby protecting the limiting cable 2.

[0056] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A drawing device for mathematics blackboard writing, characterized in that: The drawing device of the mathematics blackboard book comprises: A focus fixing component (1), wherein two focus fixing components (1) are provided, a limiting cable (2) is provided between the two focus fixing components (1), the focus fixing component (1) can be fixed on a blackboard by adsorption, and the focus fixing component (1) can adjust the length of the limiting cable (2); A gripping assembly (3), the gripping assembly (3) being arranged on the limiting cable (2) and slidingly engaged with the limiting cable (2); A drawing component (4) is fixedly arranged on the holding component (3), and the drawing component (4) can draw lines on the blackboard when the holding component (3) moves.

2. The drawing device for mathematics blackboard writing according to claim 1, characterized in that: The focus fixing component (1) comprises an adsorption fixing disk (101), a rotating platform (102), a circular shell (103), a winding disk (104), a locking round block (105), a limiting hole (106) and a fixed shell (107); the adsorption fixing disk (101) can be adsorbed and fixed on a blackboard; the outer wall of the adsorption fixing disk (101) is rotatably connected to the rotating platform (102); and the circular shell (103) is fixedly connected to the rotating platform (102).

3. The drawing device for mathematics blackboard writing according to claim 2, characterized in that: An inner cavity is provided inside the circular shell (103), a winding drum (104) is rotatably connected in the inner cavity of the circular shell (103), one end of the limiting cable (2) extends into the inner cavity of the circular shell (103) and is connected to the winding drum (104), a locking round block (105) is rotatably connected at the outer wall of the circular shell (103), and the locking round block (105) is fixedly connected to the winding drum (104).

4. The drawing device for mathematics blackboard writing according to claim 2, characterized in that: A plurality of limiting holes (106) are provided on the arc surface of the locking circular block (105); a fixed shell (107) is fixedly connected to the side wall of the circular shell (103); a movable plate (108) is slidably connected to the outer surface of the fixed shell (107); an inner cavity is provided inside the fixed shell (107); a slider (109) is slidably connected in the inner cavity of the fixed shell (107); the slider (109) is fixedly connected to the movable plate (108); a locking pin (110) is fixedly connected to the upper surface of the slider (109); one end of the locking pin (110) extends into the limiting hole (106); one end of a limiting spring (111) is fixedly connected to the bottom surface of the slider (109); the other end of the limiting spring (111) is fixedly connected to the bottom wall of the inner cavity of the fixed shell (107).

5. The drawing device for mathematics blackboard writing according to claim 1, characterized in that: The holding assembly (3) comprises a truncated cone (301), a limiting cylinder (302), a cover plate (303), a holding portion (304) and a circular plate (307); one end of two limiting cylinders (302) are rotatably connected to the side wall of the truncated cone (301); the two limiting cylinders (302) are rotatably connected to the circular plate (307); and the limiting cable (2) passes between the two limiting cylinders (302).

6. The drawing device for mathematics blackboard writing according to claim 1, characterized in that: The drawing assembly (4) comprises a support rod (401), a ball bearing (402), a fixed sleeve (403), a movable sleeve (404), a locking bolt (405) and a chalk (406). Three support rods (401) are provided, and the three support rods (401) are equidistantly fixed in a ring-shaped manner on the side wall of the circular plate (307).

7. The drawing device for mathematics blackboard writing according to claim 6, characterized in that: A groove is provided at the front end of the support rod (401), and a ball (402) is rotatably connected to the groove at the front end of the support rod (401).

8. The drawing device for mathematics blackboard writing according to claim 6, characterized in that: A fixed sleeve (403) is fixedly arranged at the center position of the circular plate (307), a movable sleeve (404) is slidably connected in the inner cavity of the fixed sleeve (403), a chalk (406) is inserted in the inner cavity of the movable sleeve (404), a locking bolt (405) is threadedly connected at the side wall of the movable sleeve (404), one end of the locking bolt (405) is pressed against the chalk (406), one end of a spring (407) is fixedly connected in the inner cavity of the fixed sleeve (403), and the other end of the spring (407) is fixedly connected to one end of the movable sleeve (404).

9. The drawing device for mathematics blackboard writing according to claim 5, characterized in that: A gripping portion (304) is fixedly connected to a side wall of one side of the cover plate (303), a circular protrusion (305) is fixedly connected to a side wall of the other side of the cover plate (303), an inner cavity is provided inside the truncated table (301), the circular protrusion (305) extends into the inner cavity of the truncated table (301), one end of a plurality of connecting springs (306) is fixedly provided on the arc-shaped wall of the circular protrusion (305), and the other ends of the plurality of connecting springs (306) are fixedly connected to the inner cavity wall of the truncated table (301).

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