CN207549806U - Ruler and ruler component - Google Patents

Abstract

The utility model provides a kind of ruler and ruler component, is related to the technical field of drawing appliance.Ruler includes horizontally disposed main scale, the movable part being vertically arranged, the centering pen being vertically arranged, the picture being vertically arranged circle pen and the first locating part；One end connection for pen and the main scale of feeling relieved, the pen tip for pen of feeling relieved stretch out one side of the main scale towards paper, are contacted with paper；Movable part is slidably connected on main scale, is drawn circle pen and is connect with movable part, the pen tip for drawing circle pen stretches out one side of the movable part towards paper, is contacted with paper；First locating part is connect with movable part, for limiting position of the movable part relative to main scale.It solves in the prior art, compasses draw the easy sideslip in the bowlder center of circle, need repeatedly to draw the technical issues of circle could be drawn.Be slidably connected between the main scale and movable part of the utility model, centering pen connect with main scale, and centering pen is vertically arranged the position in the determining center of circle, is drawn circle pen and connect with movable part and be vertically arranged picture circle, the guarantee center of circle will not sideslip, the round accuracy of guarantee drafting.

Description

Ruler and ruler component

Technical field

The utility model is related to the technical field of drawing appliance, more particularly, to a kind of ruler and ruler component.

Background technology

Compasses are the tools for drawing circle or string, are usually used in construction with ruler and compasses, are widely used in mathematics or graphics field. In building, machinery field to draw accurate drawing, it usually needs drawn and justified with compasses, in art of mathematics, when being calculated, had When be also required to picture circle, with facilitate calculate, draw bowlder generally use compasses, therefore compasses for people draw circle provide a convenient. Compasses draw bowlder, and round radius size can adjust, to draw out the different circle of radius, people can according to the actual needs, Draw out circle of different sizes.

Compasses include shaft, transition post, first body of rod being hinged and second body of rod being arranged below transition post, the The end of one body of rod is connected with pencil-lead, and the end of second body of rod is fixed with fixed core.Bowlder is drawn, first needed for ruler determines The radius of the circle of drafting separates first body of rod and second body of rod, make the end of the end of first body of rod and second body of rod coplanar and Fixed core on second body of rod after distance determines, is placed on paper by distance between the two to draw round required radius As the center of circle at any on upper or drawing board, the end of first body of rod and the end of fixed core are coplanar, rotating shaft, draw Circle is held after shaft rotates a circle, completes circular drafting.Compasses replace traditional Freehandhand-drawing and draw circle using the circle mould of hollow out, It is round convenient to draw, while the distance between first body of rod and second body of rod are adjustable, can draw the circle of a variety of different-diameters, be People draw circle and provide convenience.

But existing compasses are when drawing round, using fixed point of the fixed core on paper or on drawing board as the center of circle, Since fixed core is that a point is contacted with paper or drawing board, it is impossible to which good fixed position is susceptible to center of circle sideslip Situation, and first body of rod and second body of rod, during rotating shaft, distance between the two cannot fix, and draw round mistake It is possible that the situation that distance becomes larger or becomes smaller, causes drawn circle size to be not allowed, need to change size repeatedly in journey, It draws to illustrator and adds many troubles.

Utility model content

The purpose of this utility model is to provide a kind of rulers, in the prior art to solve, and compasses draw bowlder circle The easy sideslip of the heart needs repeatedly to draw the technical issues of circle could draw intact circle.

The utility model additionally provides a kind of ruler component, and in the prior art to solve, ruler is not portable Technical problem.

A kind of ruler provided by the utility model including horizontally disposed main scale, the movable part being vertically arranged, is vertically arranged Centering pen, the picture circle pen and the first locating part that is vertically arranged；

The centering pen is connect with one end of the main scale, and the pen tip of the centering pen stretches out the main scale towards the one of paper Face, the pen tip of the centering pen are contacted with paper；The movable part is slidably connected on the main scale, described to draw circle pen and the work Moving part connects, and the pen tip for drawing circle pen stretches out end face of the movable part towards paper, and the pen tip for drawing circle pen connects with paper It touches；First locating part is connect with the movable part, for limiting position of the movable part on the main scale.

Further, the main scale includes the first ruler body and the second ruler body, one end of the first ruler body and described second One end connection of ruler body, is equipped with link slot between the first ruler body and the second ruler body；

The movable part is equipped with horizontally disposed straight slot and the first connecting hole being vertically arranged, the straight slot and described first Connecting hole connects, and first connecting hole runs through two end faces of the movable part；

The other end of the other end of the first ruler body and the second ruler body is connect with the straight slot, makes the activity Part is slidably connected on the main scale；The circle pen of drawing passes through the link slot, is connected in first connecting hole, makes described The pen tip for drawing circle pen stretches out the end face that the movable part is contacted with paper.

Further, the one side of the movable part is equipped with the second connecting hole, and second connecting hole connects with the straight slot Logical, first locating part is connected in second connecting hole, and first locating part is to being connected to second connecting hole The interior main scale position is fixed.

Further, the second locating part is further included；

The another side of the movable part is equipped with third connecting hole, and the third connecting hole connects with first connecting hole Logical, second locating part is connected in the third connecting hole, and second locating part is to being connected to the third connecting hole An interior picture circle position is fixed.

Further, the movable part is equipped with observation slot, and the observation slot is connected with the straight slot, passes through the observation Slot observes scale value of the movable part in main scale bearing.

Further, the main scale is equipped with the first observation area, and one end of the first ruler body connects with first observation area It connects, one end of the second ruler body is connect with first observation area, and the first ruler body and the second ruler body are arranged in parallel In the same side of first observation area.

Further, the main scale includes the first main scale layer and the second main scale layer；

The first main scale layer is identical with the structure of the second main scale layer, and one end of the first main scale layer is equipped with second Observation area, one end of the second main scale layer are equipped with angle index value corresponding with second observation area.

Further, bevel protractor is further included；

The bevel protractor includes bevel protractor main body, pointer and retainer ring, and the pointer and the retainer ring are both connected to institute One end of bevel protractor main body is stated, and the retainer ring is connected to one end of the pointer；

The bevel protractor is connected between the first main scale layer and the second main scale layer, and the centering pen passes through the connection Slot is connect with the retainer ring, and the pen tip of the centering pen stretches out the end face that the main scale is contacted with paper；

During the centering pen rotation, the bevel protractor main body is rotated by rotation center of the retainer ring, and the pointer refers to To at the rotation angle of the bevel protractor main body, to determine the angle formed between the bevel protractor and the main scale.

Further, the centering pen includes pen tube, pen core, pen tip and pen cap；

The pen tip is located at the end of the pen core, and the pen core is located at the inside of the pen tube, the pen tube with it is described Pen core is is detachably connected, and the pen cap is with pen core to be detachably connected.

The utility model also provides a kind of ruler component, including writing case and ruler；

Placing groove is equipped in the writing case, the ruler is placed in placing groove.

Ruler provided by the utility model, the pen with means for holding it in right position are fixedly connected with the right end of the main scale, and the pen with means for holding it in right position erects Straight setting, the pen tip of the pen with means for holding it in right position stretches out the one side that the main scale is contacted with paper, for the positioning in the center of circle；The movable part with The main scale is slidably connected, to control round radius；The circle pen of drawing is connect with the movable part, and the circle pen of drawing is set vertically It puts, and passes through the movable part from top to bottom, the pen tip for drawing circle pen stretches out one side of the movable part towards paper, with paper Contact, for circular drafting；First locating part is connect with the movable part, limits the movable part relative to the master The centering pen is justified the distance between pen and is determined with main scale by the slip of ruler with drawing, avoid the center of circle sideslip and the two it Between distance variation, provide facility for illustrator.

Ruler component provided by the utility model, ruler are placed in placing groove, facilitate the carrying and storage of ruler, to paint Figure person provides facility.

Description of the drawings

It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution of the prior art Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below In attached drawing be the utility model some embodiments, for those of ordinary skill in the art, do not paying creativeness Under the premise of labour, other attached drawings are can also be obtained according to these attached drawings.

Fig. 1 is the fractionation schematic diagram of the first ruler that the utility model embodiment provides；

Fig. 2 is the structure diagram of the main scale of ruler that the utility model embodiment provides；

Fig. 3 is the first structure diagram of the movable part of ruler that the utility model embodiment provides；

Fig. 4 is second of structure diagram of the movable part of ruler that the utility model embodiment provides；

Fig. 5 is the fractionation schematic diagram of second of ruler that the utility model embodiment provides；

Fig. 6 is the structure diagram of the second main scale layer of second of ruler that the utility model embodiment provides；

Fig. 7 is the enlarged drawing of A in Fig. 5；

Fig. 8 is the fractionation schematic diagram of the first state of the third ruler that the utility model embodiment provides；

Fig. 9 is the structure diagram of bevel protractor that the utility model embodiment provides；

Figure 10 is the fractionation schematic diagram of the second state of the third ruler that the utility model embodiment provides.

Icon：11- main scales；12- movable parts；13- centering pens；14- draws circle pen；The first locating parts of 15-；16- second is limited Part；17- bevel protractors；111- the first ruler bodies；112- the second ruler bodies；113- link slots；The first observation areas of 114-；115- first is led Ruler layer；116- the second main scale layers；121- straight slots；The first connecting holes of 122-；The second connecting holes of 123-；124- third connecting holes； 125- observes slot；131- pen tubes；132- pen cores；133- pen caps；171- bevel protractor main bodys；172- pointers；173- retainer rings.

Specific embodiment

The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described Embodiment is the utility model part of the embodiment, instead of all the embodiments.Based on the embodiment in the utility model, sheet Field those of ordinary skill all other embodiments obtained without making creative work, belong to this practicality Novel protected range.

In the description of the present invention, it should be noted that such as occur term " " center ", " on ", " under ", " left side ", The orientation or position relationship of the instructions such as " right side ", " vertical ", " level ", " interior ", " outer " are based on orientation shown in the drawings or position Relationship is for only for ease of description the utility model and simplifies description rather than instruction or imply that signified device or element must There must be specific orientation, with specific azimuth configuration and operation, therefore it is not intended that limitation to the utility model.This Outside, such as there is term " first ", " second ", " third " are only used for description purpose, and it is not intended that instruction or implying relatively heavy The property wanted.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, such as there is term " installation ", " connected ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or one Connect to body；Can be mechanical connection or electrical connection；It can be directly connected, it can also be indirect by intermediary It is connected, can is the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition State concrete meaning of the term in the utility model.

The utility model provides a kind of ruler, the activity that the ruler includes horizontally disposed main scale 11, is vertically arranged Part 12, the centering pen 13 being vertically arranged, the picture being vertically arranged circle 14 and first locating part 15 of pen；It is described centering pen 13 with it is described One end connection of main scale 11, the pen tip of the centering pen 13 stretch out one side of the main scale 11 towards paper, the centering pen 13 Pen tip is contacted with paper；The movable part 12 is slidably connected on the main scale 11, and the circle pen 14 of drawing connects with the movable part 12 It connects, the pen tip for drawing circle pen 14 stretches out end face of the movable part 12 towards paper, and the pen tip for drawing circle pen 14 connects with paper It touches；First locating part 15 is connect with the movable part 12, for limiting position of the movable part 12 on the main scale 11 It puts.

As Figure 1-10 shows, the main scale 11 is horizontally disposed, and the centering pen 13, draws circle pen 14 vertically at movable part 12 Setting, the centering pen 13 are fixedly connected with the right end of the main scale 11, and the centering pen 13 is pierced by the main scale from top to bottom 11 right end finally so that the pen tip of the centering pen 13 stretches out the one side contacted with paper of the main scale 11, contacts, institute with paper State the positioning that centering pen 13 is used for the center of circle；The movable part 12 is slidably connected with the main scale 11, and the movable part 12 is from described The left end of main scale 11 starts to slip into, and the radius of circle is determined by the distance between the movable part 12 and main scale 11；It is described to draw circle Pen 14 is connect with the movable part 12, and the circle pen 14 of drawing is vertically arranged, and from top to bottom across the movable part 12, is finally made It obtains the pen tip for drawing circle pen 14 and stretches out end face of the movable part 12 towards paper so that the pen tip and paper for drawing round pen 14 Contact, for drawing circle；First locating part 15 is connect with the side of the movable part 12, for limiting the movable part 12 Relative to the slip of the main scale 11, to determine that the centering pen 13 draws the distance between circle pen 14 with described, avoid described Feel relieved pen 13 and it is described draw circle pen 14 between distance variation, it is ensured that round radius it is accurate, avoid the sideslip in the center of circle, for draw Person provides convenience.

The main scale 11 is slidably connected with the movable part 12, can draw the circle of different radii as needed, conveniently not With the drafting of the circle of size, the position between the main scale 11 and the movable part 12 is fixed so that round radius determines, no The generation of the phenomenon that small when will appear big during round radius so that the circle one-time-reach-place of picture facilitates round drafting.

Further, the main scale 11 includes the first ruler body 111 and the second ruler body 112, one end of the first ruler body 111 It is connect with one end of the second ruler body 112, link slot is equipped between the first ruler body 111 and the second ruler body 112 113；The movable part 12 is equipped with horizontally disposed straight slot 121 and the first connecting hole 122 being vertically arranged, first connecting hole 122 connect with the straight slot 121, and first connecting hole 122 runs through two end faces of the movable part 12；First ruler The other end of the other end of body 111 and the second ruler body 112 is connect with the straight slot 121, makes the movable part 12 in institute It states and is slidably connected on main scale 11；The circle pen 14 of drawing passes through the link slot 113, is connected in first connecting hole 122, makes The pen tip for drawing circle pen 14 stretches out the end face that the movable part 12 is contacted with paper.

As shown in Figure 2 and Figure 3, the right end of the first ruler body 111 is connect with the right end of the second ruler body 112, described The left end of the left end of first ruler body 111 and the second ruler body 112 is oppositely arranged along 113 front and rear sides of link slot, described The part that movable part 12 is connect with the main scale 11 is equipped with straight slot 121, the right end of the straight slot 121 and the first ruler body 111 Cooperation and 112 right end of the second ruler body cooperation so that the movable part 12 can be slided along the link slot 113 of the main scale 11 Connection.The upper end of the movable part 12 is equipped with the first connecting hole 122 being vertically arranged, and first connecting hole 122 passes through described Link slot 113, through two end faces up and down of the movable part 12, the circle pen 14 of drawing passes through first connecting hole 122, most Eventually so that the pen core 132 for drawing circle pen 14 stretches out the bottom end of the main scale 11, contacted with paper, facilitate the drafting of circle or arc.

Further, the one side of the movable part 12 be equipped with the second connecting hole 123, second connecting hole 123 with The straight slot 121 connects, and first locating part 15 is connected in second connecting hole 123, and first locating part 15 is right 11 position of the main scale being connected in second connecting hole 123 is fixed.

As shown in figure 3, the left side of the movable part 12 be equipped with the second connecting hole 123, second connecting hole 123 with The straight slot 121 connects, and the right side of the main scale 11 passes through the straight slot 121, and first locating part 15 passes through described second Connecting hole 123 tightens the side of main scale 11 described in clamping so that the position between the main scale 11 and the movable part 12 is consolidated It is fixed, and then determine the radius of circle, the when of becoming larger and generation the phenomenon that become smaller when avoiding the occurrence of round radius.

First locating part 15 can play the part of connection function for pin, screw or axis pin etc..

Further, the second locating part 16 is further included；The another side of the movable part 12 is equipped with third connecting hole 124, The third connecting hole 124 is connected with first connecting hole 122, and second locating part 16 is connected to the third connecting hole In 124,14 position of picture circle pen being connected in the third connecting hole 124 is fixed in second locating part 16.

As shown in Figure 3, Figure 4, the right side of the movable part 12 is equipped with third connecting hole 124, first connecting hole 122 communicate with the third connecting hole 124, and second locating part 16 passes through the third connecting hole 124, and circle pen is drawn to described 14 carry out clamping fixed, and then the position for drawing circle pen 14 is fixed, and facilitate round drafting, after determining radius, Gu It is fixed described to draw circle pen 14 and movable part 12 so that the circle of drafting it is accurate.

Second locating part 16 can play the part of connection function for pin, screw or axis pin etc..

Further, the movable part 12 is equipped with observation slot 125, and the observation slot 125 is connected with the straight slot 121, Scale value of the movable part 12 in 11 bearing of main scale is observed by the observation slot 125.

As shown in Figure 2, Figure 3, Figure 4, groove is provided on the main scale 11, the upper end of the movable part 12 is equipped with observation Slot 125, it is described observation slot 125 connected with the straight slot 121, the movable part 12 along the main scale 11 be slidably connected when, for just Just the radius of the circle of drafting is observed, setting observation slot 125 facilitates the groove on observation main scale 11, that is, facilitates the radius of observation circle, The trouble directly measured using ruler is eliminated, directly using main scale 11 with a scale, reduces error so that drafting Circle is more accurate.

Specifically, it when ruler is used to draw circle or arc, is horizontally slipped on main scale 11 using movable part 12, from institute The scale value for the contact position that the movable part 12 and the main scale 11 are observed in the observation slot 125 of movable part 12 is stated, slides into needs Scale when, pass through second connecting hole 123 using the first locating part 15, movable part 12 described in clamping and the main scale 11, The link slot 113 of the main scale 11 is passed through to fix the centering pen 13, the pen tip of the centering pen 13 is pierced by the main scale 11, it is contacted with paper, the circle pen 14 of drawing passes through the first connecting hole 122 for running through the movable part 12, the pen for drawing circle pen 14 Point stretches out the movable part 12, is contacted with paper so that and the pen tip of the pen tip for drawing circle pen 14 and the centering pen 13 is coplanar, It contacts, is later fixed the circle pen 14 of drawing with the movable part 12 using second locating part 16, the centering with paper The pen tip of pen 13 is fixed as the center of circle, and the circle pen 14 of drawing draws circle, completes the drafting of circle or arc.

The circle pen 14 of drawing is common propelling pencil.

Further, the main scale 11 is equipped with the first observation area 114, one end and described first of the first ruler body 111 Observation area 114 connects, and one end of the second ruler body 112 is connect with first observation area 114,111 He of the first ruler body The second ruler body 112 is arranged in parallel in the same side of first observation area 114.

As shown in Fig. 2, the right end of the main scale 11 is equipped with the first observation area 114, the right side of the first ruler body 111 and institute It states the first observation area 114 to connect, the right side of the second ruler body 112 is also connect with first observation area 114, first ruler Body 111 and the second ruler body 112 are arranged in parallel in the left side of first observation area 114, and the right end of the main scale 11 is equipped with Angle index is directed toward the angle index using the pointer 172 of the bevel protractor 17 so that and the angle index easily observes, Facilitate the drafting of angle.

Further, the main scale 11 includes the first main scale layer 115 and the second main scale layer 116；The first main scale layer 115 Identical with the structure of the second main scale layer 116, one end of the first main scale layer 115 is equipped with the second observation area, and described second One end of main scale layer 116 is equipped with angle index value corresponding with second observation area.

As shown in Fig. 5, Fig. 6, Fig. 7, the second main scale layer 116 is equipped with angle index, on the first main scale layer 115 Equipped with the second observation area, the first main scale layer 115 and the second main scale layer 116 are used cooperatively so that the alignment of the angle, angle Data it is more accurate, observation is convenient.

Further, bevel protractor 17 is further included；The bevel protractor 17 includes bevel protractor main body 171, pointer 172 and retainer ring 173, the pointer 172 and the retainer ring 173 are both connected to one end of the bevel protractor main body 171, and the retainer ring 173 are connected to one end of the pointer 172；The bevel protractor 17 is connected to the first main scale layer 115 and the second main scale layer Between 116, the centering pen 13 is connect across the link slot 113 with the retainer ring 173, the pen tip of the centering pen 13 Stretch out the end face that the main scale 11 is contacted with paper；When the centering pen 13 rotates, the bevel protractor main body 171 is with the fixation Ring 173 is rotated for rotation center, and the pointer 172 is directed toward at the rotation angle of the bevel protractor main body 171, to determine the angle The angle formed between degree ruler 17 and the main scale 11.

As shown in Figure 8 and Figure 9, the bevel protractor 17 is between the first main scale layer 115 and the second main scale layer 116, The centering pen 13 passes through the link slot 113 of the main scale 11, is connect with the retainer ring 173 of the bevel protractor 17 so that described The pen tip of centering pen 13 is finally contacted with paper, one end of fixed angle.The right end of the bevel protractor main body 171 of the bevel protractor 17 is set There are pointer 172 and retainer ring 173, the pointer 172 and retainer ring 173 are located at the front and rear sides of the bevel protractor main body 171, institute It states retainer ring 173 to be fixedly connected with the centering pen 13, the centering pen 13 is fixedly connected in the retainer ring 173.

During using ruler drafting angle, remove the movable part 12 and draw circle pen 14 with described, use centering pen 13, master Ruler 11 and bevel protractor 17.Feel relieved pen 13 pen tip as drafting angle endpoint, as shown in Figure 10, be with the retainer ring 173 Rotation center rotates the centering pen 13, and the main scale 11 is motionless, and the bevel protractor 17 rotates, the final bevel protractor 17 with Main scale 11 detaches angled, and pointer 172 is directed toward the scale value on the second main scale layer 116, from the first main scale layer The scale pointed by pointer 172 can be viewed in the second observation area on 115, the pointer 172 for rotating the bevel protractor 17 arrives Required scale using main scale 11 and the bevel protractor 17 as two sides for drawing angle, carries out the drafting of angle.

Further, the centering pen 13 includes pen tube 131, pen core 132, pen tip and pen cap 133；The pen tip is located at The end of the pen core 132, the pen core 132 are located at the inside of the pen tube 131, and the pen tube 131 is with the pen core 132 It is detachably connected, the pen cap 133 is with pen core 132 to be detachably connected.

As shown in Fig. 8, Figure 10, the pen tip is located at the lower end of the pen core 132, is contacted with paper.The pen core 132 In the inside of the pen tube 131, the pen tube 131 of the centering pen 13 is to be detachably connected with pen core 132, in the pen tube 131 Equipped with the 4th connecting hole, the pen core 132 is connect across the 4th connecting hole with the pen tube 131.Alternatively, the pen tube 131 include the first pen tube and the second pen tube, and second pen tube is connect with the first stroke pipe screw thread, under first pen tube End is equipped with internal thread, and the upper end of second pen tube is equipped with the external screw thread with the screw-internal thread fit, the internal thread and outer spiral shell Line connects, and first pen tube is made to be connect with the second pen tube, and first pen tube is equipped with the 5th connecting hole, the pen core 132 It is connect across the 5th connecting hole with the pen tube 131, when use directly unscrews first pen tube and the second pen tube, replaces The pen core 132.Additionally, setting pen tube 131 and pen core 132 are detachably connected, when the pen core 132 for pen 13 of feeling relieved After a period of use, it is possible that situations such as wearing or fractureing, using dismountable pen core 132, can replace pen at any time Core 132 facilitates the use of the centering pen 13.

The centering pen 13 further includes pen cap 133, and the pen cap 133 is internally provided with cross recess, the pen cap 133 with it is described Pen core 132 is by the cross recess clamping, the lead for retractable pencil for facilitating insertion different, and the pen cap 133 is used to protect the pen core 132, It prevents the pen core 132 from damaging, when not in use, directly covers the pen core 132 using pen cap 133, prevent the pen core 132 Damage facilitates the use of the centering pen 13.

It, can be with when drawing straight line it should also be noted that, the pen core 132 of the centering pen 13 is also alternatively into common lead for retractable pencil It is directly drawn using centering pen 13.

The utility model additionally provides a kind of ruler component, including writing case and ruler；It is equipped with and places in the writing case Slot, the ruler are placed in placing groove.

The ruler is placed in the placing groove of writing case, facilitates the carrying of the ruler, and facility is provided for illustrator.

Finally it should be noted that：The above various embodiments is only to illustrate the technical solution of the utility model rather than it is limited System；Although the utility model is described in detail with reference to foregoing embodiments, those of ordinary skill in the art should Understand：It can still modify to the technical solution recorded in foregoing embodiments either to which part or whole Technical characteristic carries out equivalent replacement；And these modifications or replacement, this practicality that it does not separate the essence of the corresponding technical solution are new The range of each embodiment technical solution of type.

Claims (10)

1. a kind of ruler, which is characterized in that including horizontally disposed main scale (11), the movable part (12) being vertically arranged, set vertically The centering pen (13) put, the picture being vertically arranged justify pen (14) and the first locating part (15)；

The centering pen (13) connect with one end of the main scale (11), and the pen tip of the centering pen (13) stretches out the main scale (11) towards the one side of paper, the pen tip of the centering pen (13) is contacted with paper；The movable part (12) is slidably connected at the master On ruler (11), the circle pen (14) of drawing is connect with the movable part (12), and the pen tip for drawing circle pen (14) stretches out the activity Part (12) towards paper end face, it is described draw circle pen (14) pen tip contacted with paper；First locating part (15) and the work Moving part (12) connects, for limiting position of the movable part (12) on the main scale (11).

2. ruler according to claim 1, which is characterized in that the main scale (11) includes the first ruler body (111) and second Ruler body (112), one end of the first ruler body (111) are connect with one end of the second ruler body (112), the first ruler body (111) link slot (113) is equipped between the second ruler body (112)；

The movable part (12) is equipped with horizontally disposed straight slot (121) and the first connecting hole (122) being vertically arranged, the straight slot (121) it is connected with first connecting hole (122), first connecting hole (122) is through two ends of the movable part (12) Face；

The other end of the first ruler body (111) and the other end of the second ruler body (112) connect with the straight slot (121) It connects, the movable part (12) is made to be slidably connected on the main scale (11)；The circle pen (14) of drawing is across the link slot (113), be connected in first connecting hole (122), make the pen tip for drawing circle pen (14) stretch out the movable part (12) with The end face of paper contact.

3. ruler according to claim 2, which is characterized in that the one side of the movable part (12) is equipped with the second connecting hole (123), second connecting hole (123) connects with the straight slot (121), and first locating part (15) is connected to described second In connecting hole (123), first locating part (15) to the main scale (11) position that is connected in the straight slot (121) into Row is fixed.

4. ruler according to claim 3, which is characterized in that further include the second locating part (16)；

The another side of the movable part (12) is equipped with third connecting hole (124), the third connecting hole (124) and described first Connecting hole (122) connects, and second locating part (16) is connected in the third connecting hole (124), second locating part (16) picture circle pen (14) position being connected in the third connecting hole (124) is fixed.

5. ruler according to claim 4, which is characterized in that the movable part (12) is equipped with observation slot (125), described Observation slot (125) is connected with the straight slot (121), and the movable part (12) is observed in main scale by the observation slot (125) (11) scale value of bearing.

6. ruler according to claim 3, which is characterized in that the main scale (11) is described equipped with the first observation area (114) One end of first ruler body (111) is connect with first observation area (114), one end of the second ruler body (112) and described the One observation area (114) connects, and the first ruler body (111) and the second ruler body (112) are arranged in parallel in first observation The same side in area (114).

7. ruler according to claim 2, which is characterized in that the main scale (11) includes the first main scale layer (115) and Two main scale layers (116)；

The first main scale layer (115) is identical with the structure of the second main scale layer (116), the first main scale layer (115) One end is equipped with the second observation area, and one end of the second main scale layer (116) is carved equipped with angle corresponding with second observation area Angle value.

8. ruler according to claim 7, which is characterized in that further include bevel protractor (17)；

The bevel protractor (17) includes bevel protractor main body (171), pointer (172) and retainer ring (173), the pointer (172) and The retainer ring (173) is both connected to one end of the bevel protractor main body (171), and the retainer ring (173) is connected to institute State one end of pointer (172)；

The bevel protractor (17) is connected between the first main scale layer (115) and the second main scale layer (116), the centering pen (13) it is connect across the link slot (113) with the retainer ring (173), the pen tip of the centering pen (13) stretches out the main scale (11) end face contacted with paper；

When the centering pen (13) rotates, the bevel protractor main body (171) is rotated with the retainer ring (173) for rotation center, The pointer (172) is directed toward at the rotation angle of the bevel protractor main body (171), to determine the bevel protractor (17) and the master The angle formed between ruler (11).

9. ruler according to claim 1, which is characterized in that the centering pen (13) includes pen tube (131), pen core (132), pen tip and pen cap (133)；

The pen tip is located at the end of the pen core (132), and the pen core (132) is described positioned at the inside of the pen tube (131) Pen tube (131) is with the pen core (132) to be detachably connected, and the pen cap (133) is with pen core (132) to be detachably connected.

10. a kind of ruler component, which is characterized in that including writing case and ruler as claimed in any one of claims 1-9 wherein；

Placing groove is equipped in the writing case, the ruler is placed in placing groove.