CN214523052U - Chalk-fracture-resistant drawing compass for middle-position mathematics - Google Patents

Abstract

The application discloses middle-position mathematics is with difficult cracked drawing compasses of chalk, including fixed column, solid fixed ring, rotation cover, rubber suction cup base, steel needle base, fixed plate structure, chalk fixed knot construct and connection structure, the solid fixed ring of arc wall department fixedly connected with of fixed column, solid fixed ring's arc wall department rotates and is provided with the rotation cover, the fixed plate structure of arc wall department fixed mounting who rotates the cover, the fixed plate structure includes fixed plate, slider, connecting piece and threaded rod No. one. This device is rational in infrastructure, and convenient to use, this device have chalk fixed knot structure, can carry out spacing fixed to the chalk for the drawing through chalk fixed knot structure, difficult fracture during the chalk drawing simultaneously, excellent in use effect, this device has fixed plate structure, can carry out comparatively convenient adjustment to the position of chalk through fixed plate structure, and then the radius length of the control drawing circle of being convenient for is fit for using widely.

Description

Chalk-fracture-resistant drawing compass for middle-position mathematics

Technical Field

The application relates to a drawing compass, in particular to a drawing compass with a chalk not prone to fracture for middle-aged mathematics.

Background

The invention of compasses can be traced back to the Chinese summer dynasty, the Dayu water treatment 'left rope and right gauge distance' in the Shiji-Xian Ben Ji, the oracle bone text 15 th century before the Gongyuan has a rule and a moment, and is called 'rule' at that time, namely compasses, the records of 'Zhou Li-Kao Gong-Shi-Jiang-Ming': "the craftsman establishes the country, hangs on the ground, and puts to hang, and looks at the scene. For rule, identify the scene of sunrise and the scene of sunrise. Day refers to the scene in the middle of the day, and the polar star in night.

When middle-position mathematics mr carries out mathematics teaching, need use the compasses, traditional wooden compasses are when drawing, and the teacher can hand the one end that has the chalk and draw the circle operation, and during the drawing circle, the teacher is difficult to exempt from to use too big power, leads to the too big fracture of chalk atress. Therefore, the drawing compasses are provided aiming at the problems, wherein the chalk for middle-aged mathematics is not easy to break.

Disclosure of Invention

A drawing compass with a chalk not easy to break for middle-working mathematics comprises a fixing column, a fixing ring, a rotating sleeve, a rubber sucker base, a steel needle base, a fixing plate structure, a chalk fixing structure and a connecting structure;

the fixing device comprises a fixing column, a fixing ring, a rotating sleeve, a fixing plate structure, a sliding piece, a sliding block, a connecting piece and a first threaded rod, wherein the fixing ring is fixedly connected to the arc-shaped wall of the fixing column, the rotating sleeve is rotatably arranged at the arc-shaped wall of the fixing ring, the fixing plate structure is fixedly installed at the arc-shaped wall of the rotating sleeve and comprises a fixing plate, the sliding piece, the sliding block, the connecting piece and the first threaded rod, the inner cavity is formed in the fixing plate, the sliding block is slidably connected into the inner cavity of the fixing plate, one end of the connecting piece is fixedly connected to the side wall of the sliding block, the other end of the connecting piece penetrates through the inner cavity wall of the fixing plate and extends out of the wall, the connecting piece is in sliding fit with the inner cavity wall of the fixing plate, and the first threaded rod is rotatably connected between the side walls of the two sides of the inner cavity of the fixing plate;

the chalk fixing structure is fixedly arranged at the position of the side wall of the sliding part and comprises a first rectangular rod, a second rectangular rod, a fixing block, a second threaded rod, a fixing sleeve, a connecting spring, a sliding sleeve and a rubber ring, the side wall of the sliding part is fixedly connected with the first rectangular rod, inner cavities are formed in the first rectangular rod and the second rectangular rod, the first rectangular rod and the second rectangular rod are in sliding sleeve joint, the upper wall of the inner cavity of the first rectangular rod is rotatably connected with the second threaded rod, the bottom end of the second threaded rod extends into the inner cavity of the second rectangular rod, the fixing block is fixedly connected with the position of the inner cavity of the second rectangular rod, the fixing sleeve is fixedly connected with the bottom end of the second rectangular rod, the sliding sleeve is slidably connected in the inner cavity of the fixing sleeve, and the top end of the sliding sleeve is fixedly connected with one end of the connecting spring, the other end of the connecting spring extends to the upper wall of the inner cavity of the fixed sleeve and is fixedly connected with the upper wall of the inner cavity of the fixed sleeve, and the inner cavity wall of the sliding sleeve is fixedly connected with a rubber ring;

the fixing device comprises a fixing column, and is characterized in that an inner cavity is formed in the bottom side of the fixing column, a slot is formed in the bottom end of the fixing column, a connecting structure is installed in the inner cavity of the fixing column, a limiting slip sheet is connected in the inner cavity of the fixing column in a sliding mode, one end of a limiting slide bar is fixedly connected to one side wall of the limiting slip sheet, the other end of the limiting slide bar penetrates through the inner cavity side wall of the fixing column and extends out of the wall, one end of a limiting spring is fixedly connected to one side wall of the limiting slip sheet, the other end of the limiting spring is fixedly connected to the inner cavity side wall of the fixing column, a fixing side plate is fixedly connected to one end of the limiting slide bar, a limiting contact pin is fixedly connected to the side wall of the fixing side plate, and one end of the limiting contact pin penetrates through the side wall of the fixing column and extends into the slot of the fixing column.

Furthermore, scale marks which are arranged at equal intervals are arranged on the outer surface of the fixing plate.

Furthermore, one end of the first threaded rod extends out of the wall of the fixing plate, and a handle is fixedly connected to one end of the first threaded rod.

Further, threaded rod run through the slider and with screw-thread fit between the slider.

Further, the connecting piece is fixedly connected with the inner wall of the sliding piece.

Further, the rubber circle is total a plurality of, a plurality of the equal equidistance of rubber circle is fixed in the inner wall department of sliding sleeve.

Further, No. two threaded rods run through the fixed block and with screw-thread fit between the fixed block.

Further, the top of No. two threaded rods extends to outside the upper wall of first rectangle pole, No. two threaded rods's top department fixedly connected with handle.

Furthermore, an elastic sheet is slidably connected in a slot at the bottom end of the fixing column, one end of a fixing spring is fixedly connected to the upper surface of the elastic sheet, and the other end of the fixing spring extends to the upper wall of the slot of the fixing column.

Furthermore, the rubber suction cup base and the upper side wall of the steel needle base are both provided with a limiting groove.

The beneficial effect of this application is: the application provides a drawing compass which is convenient for adjusting the radius of a drawing circle and is not easy to break with chalk for middle-duty mathematics.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a schematic perspective view of an embodiment of the present application

FIG. 2 is a schematic diagram of an internal structure of an embodiment of the present application;

FIG. 3 is an enlarged view of a portion of the structure of FIG. 2 according to an embodiment of the present disclosure;

FIG. 4 is an enlarged view of a portion of the structure shown at B in FIG. 2 according to an embodiment of the present disclosure;

FIG. 5 is a schematic side view of a cross-sectional structure of an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a needle base according to an embodiment of the present application;

fig. 7 is a schematic cross-sectional view of a sliding sleeve according to an embodiment of the present application.

In the figure: 1. the device comprises a fixed column, 2, a fixed ring, 3, a rotating sleeve, 4, a fixed plate, 5, a sliding part, 6, a sliding block, 7, a connecting piece, 8, a first threaded rod, 9, a first rectangular rod, 10, a second rectangular rod, 11, a fixed block, 12, a second threaded rod, 13, a fixed sleeve, 14, a connecting spring, 15, a sliding sleeve, 16, a rubber ring, 17, a limiting sliding rod, 18, a fixed side plate, 19, a limiting spring, 20, a limiting insertion pin, 21, a fixed spring, 22, an elastic sheet, 23, a rubber sucker base, 24, a steel needle base, 25 and a limiting sliding sheet.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

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

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Referring to fig. 1-7, a drawing compass with hardly broken chalk for middle-aged mathematics comprises a fixed column 1, a fixed ring 2, a rotating sleeve 3, a rubber sucker base 23, a steel needle base 24, a fixed plate structure, a chalk fixing structure and a connecting structure;

the arc-shaped wall of the fixing column 1 is fixedly connected with a fixing ring 2, the arc-shaped wall of the fixing ring 2 is rotatably provided with a rotating sleeve 3, the arc-shaped wall of the rotating sleeve 3 is fixedly provided with a fixed plate structure which comprises a fixed plate 4, a sliding part 5, a sliding block 6, a connecting part 7 and a first threaded rod 8, the arc-shaped wall of the rotating sleeve 3 is fixedly connected with a fixed plate 4, a sliding part 5 is sleeved on the fixed plate 4 in a sliding way, an inner cavity is arranged inside the fixed plate 4, a sliding block 6 is connected in the inner cavity of the fixed plate 4 in a sliding way, one end of a connecting piece 7 is fixedly connected with the side wall of the sliding block 6, the other end of the connecting piece 7 penetrates through the inner cavity wall of the fixed plate 4 and extends out of the inner cavity wall, the connecting piece 7 is in sliding fit with the inner cavity wall of the fixed plate 4, and a first threaded rod 8 is rotatably connected between the side walls of the two sides of the inner cavity of the fixed plate 4;

the chalk fixing structure is fixedly arranged at the side wall of the sliding part 5 and comprises a first rectangular rod 9, a second rectangular rod 10, a fixing block 11, a second threaded rod 12, a fixing sleeve 13, a connecting spring 14, a sliding sleeve 15 and a rubber ring 16, the side wall of the sliding part 5 is fixedly connected with the first rectangular rod 9, inner cavities are formed in the first rectangular rod 9 and the second rectangular rod 10, the first rectangular rod 9 and the second rectangular rod 10 are in sliding sleeve connection, the upper wall of the inner cavity of the first rectangular rod 9 is rotatably connected with the second threaded rod 12, the bottom end of the second threaded rod 12 extends into the inner cavity of the second rectangular rod 10, the fixing block 11 is fixedly connected at the wall of the inner cavity of the second rectangular rod 10, the fixing sleeve 13 is fixedly connected at the bottom end of the second rectangular rod 10, and the sliding sleeve 15 is slidably connected in the inner cavity of the fixing sleeve 13, one end of a connecting spring 14 is fixedly connected to the top end of the sliding sleeve 15, the other end of the connecting spring 14 extends to the upper wall of the inner cavity of the fixed sleeve 13 and is fixedly connected with the upper wall of the inner cavity of the fixed sleeve 13, and a rubber ring 16 is fixedly connected to the wall of the inner cavity of the sliding sleeve 15;

an inner cavity is arranged at the bottom side of the fixed column 1, a slot is arranged at the bottom end of the fixed column 1, a connecting structure is arranged in the inner cavity of the fixed column 1, a limiting sliding sheet 25 is connected in the inner cavity of the fixed column 1 in a sliding manner, one end of a limiting slide bar 17 is fixedly connected with the side wall of one side of the limiting slide sheet 25, the other end of the limiting slide bar 17 penetrates through the side wall of the inner cavity of the fixed column 1 and extends out of the wall, one end of a limiting spring 19 is fixedly connected with the side wall of one side of the limiting slide sheet 25, the other end of the limiting spring 19 is fixedly connected with the side wall of the inner cavity of the fixed column 1, one end of the limiting slide bar 17 is fixedly connected with a fixed side plate 18, the side wall of the fixed side plate 18 is fixedly connected with a limiting pin 20, one end of the limiting contact pin 20 penetrates through the side wall of the fixing column 1 and extends into the slot of the fixing column 1.

Scale marks which are arranged at equal intervals are arranged on the outer surface of the fixed plate 4; one end of the first threaded rod 8 extends out of the wall of the fixing plate 4, and one end of the first threaded rod 8 is fixedly connected with a handle; the first threaded rod 8 penetrates through the sliding block 6 and is in threaded fit with the sliding block 6

(ii) a The connecting piece 7 is fixedly connected with the inner wall of the sliding piece 5; the number of the rubber rings 16 is equal, and the rubber rings 16 are fixed on the inner wall of the sliding sleeve 15 at equal intervals; the second threaded rod 12 penetrates through the fixed block 11 and is in threaded fit with the fixed block 11; the top end of the second threaded rod 12 extends out of the upper wall of the first rectangular rod 9, and the top end of the second threaded rod 12 is fixedly connected with a handle; an elastic sheet 22 is slidably connected in a slot at the bottom end of the fixed column 1, one end of a fixed spring 21 is fixedly connected to the upper surface of the elastic sheet 22, and the other end of the fixed spring 21 extends to the upper wall of the slot of the fixed column 1; limiting grooves are formed in the side walls of the upper sides of the rubber sucker base 23 and the steel needle base 24.

When the device is used, firstly, a rubber sucker base 23 or a steel needle base 24 is fixedly connected according to the material of a drawing plane, when drawing is carried out on a blackboard, the upper end of the rubber sucker base 23 is inserted into a slot at the bottom end of a fixed column 1, a fixed side plate 18 is moved at the same time, the fixed side plate 18 drives a limit pin 20 to move, then the top end of the rubber sucker base 23 is pressed at an elastic sheet 22, a fixed spring 21 is in a compressed state, after the fixed side plate 18 is loosened, a limit sliding sheet 25 is driven to move through the rebound effect of a limit spring 19, a limit sliding rod 17 is further driven to move, the limit pin 20 is inserted into a limit slot at the side wall of the rubber sucker base 23, the rubber sucker base 23 is further fixed, chalk is inserted into an inner cavity of a sliding sleeve 15, and the chalk is tightly plugged and fixed through the elastic effect of a rubber ring 16, when drawing, the rubber sucker base 23 is tightly sucked and fixed at a corresponding position, the first threaded rod 8 drives the sliding block 6 to move by rotating the first threaded rod 8, the connecting piece 7 is further driven to move, the sliding piece 5 is further driven to move, the first rectangular rod 9 is driven to move by the movement of the sliding piece 5, the radius length of a drawing circle can be conveniently controlled by matching the scale on the fixing plate 4 according to the position of the first rectangular rod 9, the second threaded rod 12 is rotated in the fixing block 11 by rotating the second threaded rod 12, the fixing block 11 is further driven to move, the second rectangular rod 10 is driven to move by the movement of the fixing block 11, the fixing sleeve 13 and the sliding sleeve 15 are further driven to move downwards, so that chalk is in contact with the blackboard, the connecting spring 14 is in a compressed state, then the fixing plate 4 is rotated, and the chalk is driven to rotate by the rotation of the fixing plate 4, when the chalk is used for drawing circles, the chalk is not subjected to extra pressure of manual operation and is only subjected to the compression elasticity of the connecting spring 14, so that the chalk is pressed on the blackboard, the chalk is not easy to break, and the chalk is suitable for popularization and use.

The application has the advantages that:

1. the device is reasonable in structure and convenient to use, has a chalk fixing structure, can limit and fix the drawing chalk through the chalk fixing structure, is not easy to break when the chalk is used for drawing, and has a good using effect;

2. the device has a fixing plate structure, and can adjust the position of the chalk conveniently through the fixing plate structure, so that the radius length of the drawing circle can be controlled conveniently, and the device is suitable for popularization and use.

3. This device has connection structure, can be comparatively convenient fix the change to rubber suction cup base or steel needle base through connection structure, is convenient for draw the use on the plane of different materials for this device result of use is better.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. The utility model provides a middle-position mathematics is with difficult cracked drawing compasses of chalk which characterized in that: the chalk fixing device comprises a fixing column (1), a fixing ring (2), a rotating sleeve (3), a rubber sucker base (23), a steel needle base (24), a fixing plate structure, a chalk fixing structure and a connecting structure;

the fixing device is characterized in that a fixing ring (2) is fixedly connected to the arc-shaped wall of the fixing column (1), a rotating sleeve (3) is rotatably arranged at the arc-shaped wall of the fixing ring (2), a fixing plate structure is fixedly arranged at the arc-shaped wall of the rotating sleeve (3), the fixing plate structure comprises a fixing plate (4), a sliding piece (5), a sliding block (6), a connecting piece (7) and a threaded rod (8), the fixing plate (4) is fixedly connected to the arc-shaped wall of the rotating sleeve (3), the sliding piece (5) is arranged on the fixing plate (4) in a sleeved mode in a sliding mode, an inner cavity is formed in the fixing plate (4), the sliding block (6) is connected in the inner cavity of the fixing plate (4) in a sliding mode, one end of the connecting piece (7) is fixedly connected to the side wall of the sliding block (6), and the other end of the connecting piece (7) penetrates through the inner cavity wall of the fixing plate (4) and extends out of the wall, the connecting piece (7) is in sliding fit with the inner cavity wall of the fixed plate (4), and a first threaded rod (8) is rotatably connected between the side walls of the two sides of the inner cavity of the fixed plate (4);

the chalk fixing structure is fixedly arranged at the position of the side wall of the sliding part (5) and comprises a first rectangular rod (9), a second rectangular rod (10), a fixing block (11), a second threaded rod (12), a fixing sleeve (13), a connecting spring (14), a sliding sleeve (15) and a rubber ring (16), the side wall of the sliding part (5) is fixedly connected with the first rectangular rod (9), the inner cavities of the first rectangular rod (9) and the second rectangular rod (10) are respectively formed, the first rectangular rod (9) and the second rectangular rod (10) are sleeved in a sliding mode, the inner cavity upper wall of the first rectangular rod (9) is rotatably connected with the second threaded rod (12), the bottom end of the second threaded rod (12) extends into the inner cavity of the second rectangular rod (10), the inner cavity wall of the second rectangular rod (10) is fixedly connected with the fixing block (11), the bottom end of the second rectangular rod (10) is fixedly connected with a fixed sleeve (13), a sliding sleeve (15) is connected in an inner cavity of the fixed sleeve (13) in a sliding manner, the top end of the sliding sleeve (15) is fixedly connected with one end of a connecting spring (14), the other end of the connecting spring (14) extends to the upper wall of the inner cavity of the fixed sleeve (13) and is fixedly connected with the upper wall of the inner cavity of the fixed sleeve (13), and the wall of the inner cavity of the sliding sleeve (15) is fixedly connected with a rubber ring (16);

an inner cavity is formed in the bottom side of the fixed column (1), a slot is formed in the bottom end of the fixed column (1), a connecting structure is installed in the inner cavity of the fixed column (1), a limiting slip sheet (25) is connected in the inner cavity of the fixed column (1) in a sliding mode, one end of a limiting slide bar (17) is fixedly connected to the side wall of one side of the limiting slip sheet (25), the other end of the limiting slide bar (17) penetrates through the side wall of the inner cavity of the fixed column (1) and extends out of the wall, one end of a limiting spring (19) is fixedly connected to the side wall of one side of the limiting slip sheet (25), the other end of the limiting spring (19) is fixedly connected to the side wall of the inner cavity of the fixed column (1), a fixed side plate (18) is fixedly connected to one end of the limiting slide bar (17), and a limiting contact pin (20) is fixedly connected to the side wall of the fixed side plate (18), one end of the limiting contact pin (20) penetrates through the side wall of the fixing column (1) and extends into the slot of the fixing column (1).

2. The drawing compass, which is not easy to break with chalk for middle-aged mathematics, is characterized in that: scale marks which are arranged at equal intervals are arranged on the outer surface of the fixing plate (4).

3. The drawing compass, which is not easy to break with chalk for middle-aged mathematics, is characterized in that: one end of the first threaded rod (8) extends out of the wall of the fixing plate (4), and one end of the first threaded rod (8) is fixedly connected with a handle.

4. The drawing compass, which is not easy to break with chalk for middle-aged mathematics, is characterized in that: the first threaded rod (8) penetrates through the sliding block (6) and is in threaded fit with the sliding block (6).

5. The drawing compass, which is not easy to break with chalk for middle-aged mathematics, is characterized in that: the connecting piece (7) is fixedly connected with the inner wall of the sliding piece (5).

6. The drawing compass, which is not easy to break with chalk for middle-aged mathematics, is characterized in that: the rubber ring (16) is provided with a plurality of rubber rings, and the rubber rings (16) are fixed on the inner wall of the sliding sleeve (15) at equal intervals.

7. The drawing compass, which is not easy to break with chalk for middle-aged mathematics, is characterized in that: the second threaded rod (12) penetrates through the fixing block (11) and is in threaded fit with the fixing block (11).

8. The drawing compass, which is not easy to break with chalk for middle-aged mathematics, is characterized in that: the top of No. two threaded rod (12) extends to outside the upper wall of first rectangle pole (9), the fixedly connected with handle is located at the top of No. two threaded rod (12).

9. The drawing compass, which is not easy to break with chalk for middle-aged mathematics, is characterized in that: an elastic sheet (22) is slidably connected in a slot at the bottom end of the fixing column (1), one end of a fixing spring (21) is fixedly connected to the upper surface of the elastic sheet (22), and the other end of the fixing spring (21) extends to the upper wall of the slot of the fixing column (1).

10. The drawing compass, which is not easy to break with chalk for middle-aged mathematics, is characterized in that: limiting grooves are formed in the side walls of the upper sides of the rubber sucker base (23) and the steel needle base (24).

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