CN212737574U - Drawing tool - Google Patents

Abstract

The utility model relates to a drawing tool field. The utility model relates to a drawing tool. One version of the drawing tool comprises: the outer shell comprises a first ring part and a second ring part, the first ring part and the second ring part are concentric, and the first ring part can rotate relative to the second ring part; spacing piece is the arc, and one end is rotated with the second ring portion and is connected, and the other end can be along with first ring portion synchronous rotation, and can slide second ring portion relatively, and a plurality of spacing pieces are along the circumference evenly distributed of first ring portion, and the inboard limit of each spacing piece is injectd and is injectd the circular region that can adjust the diameter along with the removal of spacing piece. The drawing tool has good safety.

Description

Drawing tool

Technical Field

The utility model belongs to the technical field of drawing tool and specifically relates to a circle drawing tool is related to.

Background

When building drawings are drawn or artistic creation is carried out daily, people often need to draw various figures such as circles by compasses. However, the bottom of the legs of a conventional pair of compasses is usually provided with a sharp needle for centering and fixing one of the pair of compasses legs when drawing a circle. However, the needle prick at the bottom of the support leg of the common compasses is very sharp, and a user is easily pricked when the compasses are used; and after the common compasses are used, the needle prick at the bottom of the supporting leg can damage the paper surface of the drawing. Therefore, a need exists for a circle drawing tool that is safe to use.

SUMMERY OF THE UTILITY MODEL

The utility model discloses solve one of the technical problem in the correlation technique at least to a certain extent. To this end, it is an object of embodiments of the present invention to provide a drawing tool with good safety.

The embodiment of the utility model provides an adopted technical scheme is:

in a first aspect, a drawing tool is provided, which comprises a housing and a plurality of limiting pieces; the shell comprises a first ring part and a second ring part, the first ring part and the second ring part are concentric, and the first ring part can rotate relative to the second ring part; spacing piece is the arc, and one end is rotated with the second ring portion and is connected, and the other end can be along with first ring portion synchronous rotation, and can slide second ring portion relatively, and a plurality of spacing pieces are along the circumference evenly distributed of first ring portion, and the inboard limit of each spacing piece is injectd and is injectd the circular region that can adjust the diameter along with the removal of spacing piece.

The utility model discloses beneficial effect of embodiment:

the embodiment of the utility model provides a through using can be by the towed spacing layer of first ring portion and second ring portion combined action to prescribe a limit to the means of the circular size that will draw, overcome and used the compasses to draw the unsafe technical problem of circle among the prior art, realized not using traditional compasses also can draw the circular shape technological effect of appointed radius size safely.

In some embodiments of the utility model, the upper surface of the other end of each spacing piece is equipped with the first arch of upwards protruding, and the lower surface of first ring portion is equipped with the first limit structure who corresponds with first arch to it is spacing to carry out first arch.

In some embodiments of the present invention, the first limiting structure is a strip-shaped groove extending along the first ring portion in the radial direction, and the first protrusion can be slidably inserted into the strip-shaped groove.

The utility model discloses an in some embodiments, the lower surface of the one end of every spacing piece is equipped with the second arch of downward convexity, is equipped with the second limit structure who corresponds with the second arch along the circumference on the second ring portion to it is spacing to carry on the second arch.

In some embodiments of the present invention, the second limiting structure is a hole corresponding to the second protrusion, and the second protrusion can be rotatably inserted into the hole.

In some embodiments of the present invention, a first guide rail is arranged along the circumference on the outer side of the first ring portion, and the first guide rail can be adapted to the elastic collar.

In some embodiments of the present invention, the inner side of the second ring portion is provided with a second guide rail along the circumference, and the second guide rail can be adapted to the circlip.

In some embodiments of the present invention, the first ring portion is marked with scales along the circumference, and the outer circumference of the second ring portion is marked with scale indication marks.

The utility model discloses a some embodiments, the instrument of drawing still includes the base, and the base is fan-shaped, and fan-shaped radius equals the inner radius of first ring portion or second ring portion, and fan-shaped and first ring portion or second ring portion have the same centre of a circle.

In some embodiments of the present invention, the surface of the base is provided with a recess, and the width of the recess corresponds to the sum of the thicknesses of the first ring portion and the second ring portion.

Drawings

FIG. 1 is a disassembled schematic view of one embodiment of the present invention;

figures 2a and 2b show a top view and a front view, respectively, of the first ring portion of the embodiment shown in figure 1;

FIG. 3 is a bottom view of the first ring portion of the embodiment shown in FIG. 1;

fig. 4 shows a front view and a side view of a single stop tab of an embodiment of the invention;

FIGS. 5a and 5b show a front view and a side view, respectively, of a stopper layer formed by stacking a plurality of stopper plates as shown in FIG. 4;

FIGS. 6a, 6b and 6c show a bottom view, a side view and a cross-sectional view taken along the A-A direction in FIG. 6b, respectively, of the second ring portion of the embodiment shown in FIG. 1;

fig. 7 shows a schematic view of an embodiment of the invention in different states of use, respectively;

figures 8a and 8B show a front view and a cross-sectional view taken in the direction B-B in figure 8a, respectively, of an embodiment of the invention;

fig. 9a and 9b show a top view and a front view, respectively, of a base of an embodiment of the invention.

Detailed Description

This part will describe the embodiment of the present invention in detail, and the embodiment of the present invention is shown in the attached drawings, and the function of the attached drawings is to supplement the description of the text part of the specification with figures, so that each technical feature and the whole technical solution of the embodiment of the present invention can be understood visually and vividly, but it cannot be understood as the limitation to the protection scope of the present invention.

In the description of the present invention, if an orientation description is referred to, for example, the directions or positional relationships indicated by "upper", "lower", "front", "rear", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, only for convenience of description and simplification of description, and it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. If a feature is referred to as being "disposed," "secured," or "connected" to another feature, it can be directly disposed, secured, or connected to the other feature or be indirectly disposed, secured, or connected to the other feature.

In the description of the embodiments of the present invention, if "a plurality" is referred to, it means one or more, if "a plurality" is referred to, it means two or more, if "greater than", "less than" or "more than" is referred to, it is understood that the number is not included, and if "more than", "less than" or "within" is referred to, it is understood that the number is included. If reference is made to "first" or "second", this should be understood to distinguish between features and not to indicate or imply relative importance or to implicitly indicate the number of indicated features or to implicitly indicate the precedence of the indicated features.

In addition, unless defined otherwise, technical and scientific terms used in the embodiments of the present invention have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1, a disassembled schematic view of a drawing tool in one embodiment of the present invention is shown. As shown in the figure, the drawing tool mainly comprises a first ring part 1(top ring), a second ring part 2(bottom ring), a limiting layer 3 consisting of a plurality of limiting sheets 31 and an elastic retainer ring 4; in other embodiments, a rubber layer 5 is further included, and the rubber layer 5 can be attached to the bottom of the second ring part 2 in a patch manner to increase the friction coefficient of the bottom of the second ring part 2 and reduce the sliding of the drawing tool on the paper.

Specifically, as the bottom of the drawing tool, the second ring part 2 is located below the first ring part 1, and the limiting layer 3 is arranged between the first ring part 1 and the second ring part 2. The first ring part 1 and the second ring part 2 are concentric rings and have the same inner diameter. Wherein, the outer diameter of the first ring part 1 is slightly smaller than the outer diameter of the second ring part 2, and the first ring part 1 can rotate relative to the second ring part 2. As shown in fig. 2b, the first ring part 1 has a first guide rail 12 recessed at the outer side of the circumference; correspondingly, as shown in fig. 6c, the second ring part 2 also has a second guide rail 21 recessed at an inner circumference; in use, as shown in the cross-sectional view of fig. 8b, the first rail 12 corresponds to the second rail 21 and to the circlip 4, and the circlip 4 can be fitted between the first rail 12 and the second rail 21 to rotate the first ring part 1 relative to the second ring part 2.

Referring to fig. 4, the shape structure of a single stopper piece 31 is shown. Referring to fig. 5a, 5b, the shape and structure of the stopper layer 3 composed of a plurality of stopper pieces 31 are shown. As shown in fig. 4, the stopper piece 31 is a circular arc-shaped strip-shaped blade, and a plurality of stopper pieces 31 are sequentially and uniformly stacked at intervals to form the annular stopper layer 3 shown in fig. 5 a. Illustratively, in this embodiment, the stopper piece 31 is a circular arc-shaped strip blade having a central angle of 137.4 degrees and a radius of 35mm, and both ends of the strip blade are semicircular with a radius of 4.5 mm. Illustratively, in the limiting layer 3, 20 limiting sheets 31 are uniformly stacked at intervals to form a circular ring with the radius of 35mm, and the inner radius of the first ring part 1 and the second ring part 2 is also 35 mm. In order to enable the limiting sheets 31 to move relative to each other according to actual needs so as to define circles with different radii, two ends of each limiting sheet 31 are respectively provided with a protrusion for the limiting sheets 31 to be pulled. It will be appreciated that the spacing pieces 31 may be made of spring steel.

The left side of fig. 4 shows a front view of a single spacing piece and the right side of fig. 4 shows a side view of a single spacing piece. Specifically, as shown in the figure, the upper surface of the first end (the upper end of the limiting piece 31 in fig. 4) of each limiting piece 31, that is, the surface of the limiting piece 31 facing the bottom of the first ring part 1, is provided with a first protrusion 32, and the first protrusion 32 is located at the half radius of the semicircular first end of the limiting piece 31 from the outer edge of the limiting piece; a second protrusion 33 is provided on the lower surface of the second end (the lower end of the limiting plate 31 in fig. 4) of each limiting plate 31, that is, on the surface of the limiting plate 31 facing the second ring part 2, and the second protrusion 33 is located at the center of the semicircular second end of the limiting plate 31. After a plurality of the above-mentioned spacing pieces 31 are uniformly stacked at intervals, a circular ring-shaped spacing layer 3 as shown in fig. 5a is formed, and both the upper surface and the lower surface of the spacing layer 3 are provided with protrusions for the spacing pieces 31 to be pulled by other components to move or rotate.

Correspondingly, in order to enable the plurality of limiting sheets 31 of the limiting layer 3 to be dragged to move or rotate, the inner surface of the first ring part 1 is provided with a corresponding number of limiting structures corresponding to the limiting sheets 31. As shown in fig. 3, in this embodiment, the limiting structures are strip-shaped grooves 11 extending radially in the direction of the center of the first ring part 1, the width of the strip-shaped groove 11 is not less than the radius of the cross section of the first protrusion 32, the widths of the strip-shaped grooves 11 are equal, two ends of the strip-shaped groove 11 are semicircles with a diameter equal to the width of the strip-shaped groove 11, and the number of the strip-shaped grooves 11 is equal to the number of the first protrusions 32 on the limiting layer 3. Consequently, assemble first ring portion 1 and spacing layer 3 after, a plurality of first archs 32 on spacing layer 3 will fall into the bar groove 11 of establishing at the bottom internal surface of first ring portion 1 one-to-one to can make a round trip to slide in bar groove 11. Referring to fig. 6a, the second ring part 2 is provided with the same number of stopper structures as the second protrusions 33 along the circumference, corresponding to the second protrusions 33 on the lower surface of the stopper piece 31. In this embodiment, the position limiting structures corresponding to the second protrusions 33 are round holes, and the cylindrical second protrusions 33 are embedded in the round holes, so as to fix each position limiting piece 31 on the position limiting layer 3. Therefore, when the limiting sheet 31 of the limiting layer 3 is dragged due to the rotation of the first ring part 1, one end of the limiting sheet 31 can rotate synchronously with the first ring part 1, and the other end is rotatably connected with the second ring part 2, namely, the limiting sheet 31 slides relative to the second ring part 2, and the second ring part 2 can be stationary. It should be understood that the limiting structure is not limited to the circular hole or the strip-shaped groove 11, and the like, as described above, as long as the limiting structure can be correspondingly matched with the protruding structure on the limiting piece 31.

It is understood that each of the stopper pieces 31 on the stopper layer 3 is connected to the first ring part 1 and the second ring part 2 by the projections provided on the upper surface and the lower surface of the stopper piece 31. Therefore, when the first ring part 1 is rotated relative to the second ring part 2, the strip-shaped groove 11 on the inner surface of the bottom of the first ring part 1 will also rotate along with the first ring part 1, at this time, each limiting piece 31 is drawn by the rotating strip-shaped groove 11, rotates relative to the second ring part 2, and presents different states as shown by a, b, c and d in fig. 7 along with the rotation, the inner side edge of each limiting piece defines circular areas with different diameters, and a plotter can draw circles with different radii on paper.

In some embodiments, the outer circumferential edge of the upper surface of the first ring part 1 is marked with a scale (not shown), and the outer circumferential edge of the second ring part 2 is marked with scale indication marks (not shown), which cooperate to show the radius or diameter of the circular area defined by the inner edges of the plurality of spacing pieces. This function of measuring the size of the radius can be achieved by manual calibration during the product design phase. During calibration, a drawing tool is placed on a drawing paper, the position of the first ring part 1 of the drawing tool in an original state is recorded by taking the scale indication arrow on the second ring part 2 as a reference, the first ring part 1 is rotated immediately, the inner side edges of the limiting pieces 31 define a circle with the radius of R cm, a pencil is used for drawing the circle and measuring the radius of the circle, the position to which the first ring part 1 corresponding to the scale indication arrow on the second ring part 2 rotates at the moment is recorded and corresponds to the scale of R cm, and the like.

In some embodiments, the drawing tool further comprises a base 6. As shown in fig. 9a, the base 6 is a hexahedron and has a sector shape when viewed from the top, the sector shape has the same center as the first ring part 1 and the second ring part 2, and the radius of the sector shape is equal to the inner radius of the first ring part 1 and the second ring part 2. Thus, the base 6 can be used in conjunction with the drawing tool described above to draw a circle of a specified radius at a specified point around the specified point. In use, the drawing tool is brought into the state shown in a of fig. 7, and the circular drawing tool is placed in the area near the designated point so that the designated point falls within the range covered by the circular drawing tool. Then, the fan-shaped base 6 is placed at the inner circular ring of the circular drawing tool, and the arc-shaped edge of the base 6 is attached to the inner circular ring of the first ring part 1 or the second ring part 2. At this time, the fan-shaped base 6 and the annular drawing tool along the base are moved until the center of the circle of the base 6 coincides with the designated point. At this time, the center of the circle to be drawn is determined. And then, correspondingly rotating the first ring according to the scales on the first ring and the scales on the second ring and the scale indication marks, and drawing the circle defined by the edge of the limiting layer 3 by using a painting brush, so that the circle with the corresponding radius can be drawn.

In other embodiments, the surface of the fan-shaped base 6 is further provided with a recess 61, the width of the recess 61 is not less than the sum of the thicknesses of the first ring part 1 and the second ring part 2, and the shape of the recess 61 corresponds to the outer circumferential edge of the second ring part 2, as shown by the dotted line in fig. 9b, so that the recess 61 can be adapted to the annular drawing tool. When the circle is drawn without using a drawing tool, the circular drawing tool can be placed on the base 6 obliquely or vertically through the recess 61.

The drawing tool can safely draw a circle with a desired radius without using the traditional compasses, and can conveniently draw the circle with the desired radius by rotating the first ring part 1 even if the circle with the small radius exists, so that the problems that the potential safety hazard exists in the drawing process of the traditional compasses and the circle with the small radius is difficult to draw by the traditional compasses are solved to a certain extent.

The embodiments of the present invention have been described in detail, but the present invention is not limited to the embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are included in the scope of the present invention defined by the claims. Furthermore, the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.

Claims (10)

1. A drawing instrument, comprising:

the shell comprises a first ring part and a second ring part, the first ring part and the second ring part are concentric, and the first ring part can rotate relative to the second ring part;

the limiting plates are arc-shaped, one end of each limiting plate is connected with the second annular part in a rotating mode, the other end of each limiting plate can rotate synchronously with the first annular part and can slide relative to the second annular part, the limiting plates are evenly distributed along the circumferential direction of the first annular part, and a circular area which can adjust the diameter along with the movement of the limiting plates is limited by the inner side edges of the limiting plates.

2. The drawing tool as claimed in claim 1, wherein the upper surface of the other end of each of the stopper pieces is provided with a first protrusion protruding upward, and the lower surface of the first ring part is provided with a first stopper structure corresponding to the first protrusion to stopper the first protrusion.

3. The drawing instrument of claim 2, wherein the first limiting structure is a strip-shaped groove extending radially along the first ring portion, and the first protrusion is slidably inserted into the strip-shaped groove.

4. The drawing tool according to claim 1, wherein a second protrusion protruding downward is provided on a lower surface of the one end of each of the position-limiting pieces, and a second position-limiting structure corresponding to the second protrusion is provided on the second ring portion along a circumference thereof to limit the second protrusion.

5. The drawing instrument of claim 4, wherein the second limiting structure is a hole corresponding to the second protrusion, and the second protrusion is rotatably inserted into the hole.

6. The drawing instrument according to claim 1, wherein a first guide rail is circumferentially provided on an outer side of the first ring portion, the first guide rail being capable of fitting with a circlip.

7. A drawing instrument according to claim 6, wherein the inner side of the second ring portion is circumferentially provided with a second guide rail adapted to the circlip.

8. A drawing instrument according to any one of claims 1 to 7, wherein the first ring portion is provided with graduations along the circumference thereof, and wherein graduated indicator markings are provided on the outer circumference of the second ring portion.

9. The drawing instrument according to any one of claims 1 to 7, further comprising a base, wherein the base is a sector having a radius equal to an inner radius of the first ring portion or the second ring portion, and the sector has the same center as the first ring portion or the second ring portion.

10. The drawing instrument of claim 9, wherein the surface of the base is provided with a depression having a width corresponding to the sum of the thicknesses of the first and second ring portions.

Images