CN1054217A - Drawing instrument for drawing circular arc in perspective - Google Patents
Drawing instrument for drawing circular arc in perspective Download PDFInfo
- Publication number
- CN1054217A CN1054217A CN 90100981 CN90100981A CN1054217A CN 1054217 A CN1054217 A CN 1054217A CN 90100981 CN90100981 CN 90100981 CN 90100981 A CN90100981 A CN 90100981A CN 1054217 A CN1054217 A CN 1054217A
- Authority
- CN
- China
- Prior art keywords
- base plate
- perspective
- circular arc
- directive wheel
- chuck
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
A kind of drafting perspective view or circular arc, particularly vanishing point or the center of circle perspective view voice-over or the drawing instrument of large radius arc.Base plate, marking-out rule, hole are arranged, two equal diameters and rotate freely roller at same axis, the guiding attitude reference device, the left-right orientation that have a directive wheel select and brake apparatus.Have characteristics such as volume is small and exquisite, the amplitude of accommodation is big, and suitable tradition is had an X-rayed the operating type of step, and is easy to use, when especially being 30 °, 45 °, 60 ° perspectives, can regulate corner, need not calculate direct mapping according to the sighting distance scale that the last figure chi of base plate is represented as angle.Be suitable for building, planning, building, Machine Design, also can be the schooling apparatus of this class specialty.
Description
A kind of drawing instrument.
Generally speaking, draw the required definite vanishing point of perspective view always away from looking center line.If accounted for significant proportion near picture edge or its perspective profile at picture by the perspective profile of perspective object, vanishing point just drops on outside the picture undoubtedly.Drawing so traditional method of perspective view is: make sample earlier, and then amplify sample.This practice has brought many troubles for drawing work, and therefore, the relevant technologies personnel of many countries are devoted to research and solve vanishing point and draw problem at offscreen perspective view.Though they do not develop the instrument or the device of few type, however most of achievement or because of bulky, complex structure, or various because of accessory, use reason such as inconvenience to fail to obtain to promote and use.U.S. Pat 170832 described plotters are the base plates that are contained on the wheels by, and the differential gear and a line ruler that can make two rollers produce proportion adjustable that is contained on the base plate is formed.Though this plotter can be finished vanishing point perspective view voice-over, but exist the problem of the following aspects: one, in the drawing process of general perspective view, people get used to the perspective relation according to point, line, surface, from integral body to the part, or from inside to outside, or mapping from outside to inside.When drawing certain part perspective, the operation of left and right sides perspective ray hockets often, and U.S. Pat 170832 can not adapt to the practice of custom.Use this plotter will draw all perspective rays that disappear to a side vanishing point earlier, regulate differential gear then, draw all perspective rays that disappear to opposite side again.If the perspective practice by custom is used this plotter, the operation of left and right sides perspective ray hockets, and so, whenever alternately once will regulate one time differential gear, and to make that this instrument uses very inconvenient in adjusting so continually.Its two, the marking-out rule of this plotter is because the relation of structure, its scribing edge is stopped that by two rollers the length of the perspective ray of drawing is restricted inevitably.Its three, this plotter is two garden platforms because of regulating differential gear, when r1/r2=1, R → ∞, and get maximum as r2, r1 is non-vanishing, r1/r2＞0 then, this moment R ≠ 0, but on the structure inevitably limitation influenced its amplitude of accommodation.Its four, the cumbersome transmission device of this plotter not only is not easy to regulate, and the slippage that produces in its transmission is difficult to guarantee drafting accuracy.Its five, this plotter transmission mechanism complexity, the especially stepless speed-regulating device between two truncated cone-shaped wheel make it produce and assembly technology requires too high.All these problems affect the using and promoting of this plotter.
When drawing large radius arc, generally solve by the method for spline with " looking for a trace ", the hanging down of its quality and efficient is conspicuous.Though the big picture circle instrument that is similar to " compasses " is also arranged much, it is difficult for finishing center of circle large radius arc operation of (away from chart board) beyond picture eventually, and this quasi-instrument or device are again often to work-yard requirement to some extent.Though some instrument can be made large radius arc, complex manufacturing is used inconvenience, is difficult to promote and use.
The present invention's purpose is to provide that a kind of volume is small and exquisite, cost is low, easy to use, especially adapt to traditional drafting perspective view custom, degree of amplitude modulation is big, can draw perspective view or circular arc, particularly vanishing point or the center of circle drawing instrument at offscreen perspective view or large radius arc
The present invention's purpose realizes by following design and mode:
Its design is: design a kind ofly under the situation in " breaking away from " center of circle, can finish circular motion, and then realize the device of the present invention's purpose.Automobile is in travelling in smooth place, if its directive wheel keeps certain corner constant (ignoring factors such as wind-force, road surface sideslip influences it), this car is made circular-course driving, and R is constant for its turning radius.Corner B is bigger, and then turning radius R is littler; B is littler for corner, and then turning radius R is bigger; If corner B is zero, then this car straight-line travelling.When front-wheel (directive wheel) had a non-vanishing corner B, the extending line intersection point of front and back axis was the turning center of this car (O).By turning center to the distance of the longitudinal axis of this car is turning radius (R), if wheelbase is (D), and tgB=D/R (Fig. 1) then.By the perspective principle as can be known, be (A) if having an X-rayed the contoured surface (line) of object with the picture angle, sighting distance is (S), vanishing point (M) to the distance of viewpoint (P) is (L), then tgA=S/L (Fig. 2).If setting turning center and vanishing point is same fixed point, turning radius and vanishing point be to looking center line distance from equating (R=L), then tgA/tgB=S/D (Fig. 3).In the present invention, (D) scribing edge of expression line slide rule is constant to the distance of guide wheel shaft horizontal direction.Therefore, when determining that by perspective object and picture angle be (A), when sighting distance is (S), definite directive wheel corner (B), i.e. a tgB=DtgA/S are just arranged.(D
1) represent the distance of line hole to the guide wheel shaft horizontal direction, be constant.Therefore, when definite drawn radius of a circle is (R), definite directive wheel corner (B), that is: a tgB=D are just arranged
1/ R.
The present invention has base plate, line ruler, two diameters are identical and axle can rotate freely around axle respectively rollers on same axis, have line hole, left-right orientation selecting arrangement and figure chi and brake apparatus on the perpendicular bisector of the axle that is positioned at two-wheeled in the guiding attitude reference device, dial, base plate of a directive wheel.
In the present invention, the line ruler that has scribing edge is to be matched with the containment type guide rail at the base plate back side by the containment type guide rail by one pair, thus this chi can about sliding stretching; The marking-out rule handle is by traction of the handle runner on the base plate and fixing line ruler; Base plate middle part has a line hole to be positioned on the perpendicular bisector of axle of two-wheeled; The scale mark dish of a similar graphometer; A gathering sill is arranged, chuck jack and be fixed on wheel shaft on the base plate on the base plate; Also have two can be respectively to rotate freely and the identical roller of diameter, thickness and material around the wheel shaft of same axis; Roller and drawing contact portion can adopt the anti-pulley line or be coated with the subsides non-slip rubber.Guiding attitude reference device among the present invention can be by base plate, chuck, guide post and pass the guide positioning pin that gathering sill links to each other with guide post and constitute.Be contained in the rectangle race of the chuck on the base plate and the middle wheel shaft that accompanies directive wheel of inlaying of rectangle race of guide post, the directive wheel that contacts with drawing sways in groove.Guide positioning pin pass the guide post screw hole in gathering sill, slide and draw guide post with control directive wheel corner B; Its corner B comes out by the position display of graduation mark on the scale mark dish that is engraved on the guide post.In gathering sill, the both sides of guide positioning pin have respectively can slide in groove and fixing left alignment pin, right alignment pin, can be for directed select (Fig. 4, Fig. 5), guiding attitude reference device can also and be contained in by the dial on the base plate, chute and be with the worm screw and the vernier slide block of chuck worm gear, that directive wheel is housed and band thumb wheel to form on the base plate.Chuck is stuck in the chuck jack on the base plate and with it movingly; The axis direction of chuck has a rectangle race, and coaxial and two the rectangle races of the worm gear that the bottom surface of chuck and a center have same rectangle race align mutually, and edge accompanies the wheel shaft of directive wheel in the race; The directive wheel that contacts with drawing sways in race, and can together turn to chuck and worm gear; There is the dial of the similar ruler parallel with worm screw in the front of base plate; A worm screw that is meshed with worm gear is equipped with at the back side of base plate, and thumb wheel is coaxial with worm screw and this axle is parallel with the axis of two rollers; Being parallel to the vernier slide block that slides in the chute of worm screw on base plate has double wedge with worm engaging, can move on dial with the rotation of worm screw, indicates worm gear chuck and directive wheel corner B.In chute, the both sides of vernier slide block have respectively can slide in groove and fixing left alignment pin and right alignment pin, can be for directed select (Figure 12, Figure 13).Two hand brake apparatus on the base plate, when not braking, spring holds up suction tray, and suction tray and drawing contact portion are coated with the subsides non-slip rubber.
Operation principle of the present invention is as follows:
(1) when B=0 ° and fixedly the time, the axle of roller is parallel with the axle of directive wheel.Drawing instrument for drawing circular arc in perspective moves at drawing, when braking in the arbitrfary point, is parallel to each other by the line drawn of scribing edge of line slide rule and the line of being drawn when the braking of another arbitrfary point.If paintbrush is inserted the line hole, mobile drawing instrument for drawing circular arc in perspective, the track that marks are straight line (Figure 14).
(2) when ° optional position, 0 °＜B＜90 and after fixing, drawing instrument for drawing circular arc in perspective moves at drawing.When braking in the arbitrfary point, the extended line of the line of drawing by scribing edge all meets at a fixed point (vanishing point) with the extended line of being rule when the braking of another arbitrfary point, and all these lines are a ray (perspective ray) of fixing a point.If paintbrush is inserted the line hole, mobile drawing instrument for drawing circular arc in perspective, the track that draws are circular arc (Figure 15).
When R changes by 0 ° → 90 °, then a fixed point (vanishing point) to the variation of the distance of drawing instrument for drawing circular arc in perspective longitudinal axis by ∞ → 0 (the R value is by ∞ → 0).When B changed by 90 ° → 0 °, then (the R value was by 0 → ∞) by 0 → ∞ to the variation of the distance of drawing instrument for drawing circular arc in perspective longitudinal axis for a fixed point (vanishing point).
When (3) graduation mark is on the left of scale mark dish center line (0 °), mobile drawing instrument for drawing circular arc in perspective, then the vanishing point or the center of circle are on the right side of its longitudinal axis.
Graduation mark when scale mark dish center line (0 °) right side, mobile drawing instrument for drawing circular arc in perspective, then the vanishing point or the center of circle are in the left side of its longitudinal axis.
Implementation method of the present invention is as follows:
The perspective step:
Adopt the drawing instrument for drawing circular arc in perspective drafting perspective view step of chuck guiding rod-type guiding attitude reference device as follows:
(1) in by the plane of perspective object, selects picture line and definite viewpoint.Object and picture angle are A, A
1, viewpoint is S to the distance of picture, tgB=DtgA/S asks B according to formula.Guide post is allocated to B in the dial, B respectively
1The position, regulate fixedly left and right sides alignment pin respectively.
If A=30 °, 45 ° or 60 °, directly guide post is allocated to then that reading is on the position of sighting distance S on the corresponding curve map chi, regulate fixedly left and right sides alignment pin respectively.
(2) make mutually perpendicular center line and the eye-level display (its intersection point is O) looked on picture, vertical directrix in line hole is overlapped with looking center line, the company's edge of ruling overlaps with eye-level display.
(3) promote the base plate line.Make left perspective ray or right perspective ray, only need make guide post the keep right alignment pin or the alignment pin that keeps left, repeat (2) and get final product.
Adopt the drawing instrument for drawing circular arc in perspective of chuck Worm-gear type guiding attitude reference device, its perspective step is as follows:
(1) in the plane complete, selects the picture line and determine viewpoint by the perspective thing.Object and picture angle are A, A
1, viewpoint is S to the distance of picture, tgB=DtgA/S asks B according to formula.Thumb wheel is allocated to respectively makes B, B in the vernier slide block indicating graduation dish
1The position, regulate fixedly left and right sides alignment pin respectively.
If A=30 °, 45 ° or 60 °, then directly thumb wheel being allocated to corresponding rectilinear chi high scale is on the position of sighting distance S, regulate fixedly left and right sides alignment pin respectively.
(2) on picture, make orthogonal center line and the eye-level display (its intersection point is O) looked, with the line hole vertical directrix overlap with looking center line, scribing edge overlaps with eye-level display.
(3) promote the base plate line.Make left perspective ray or right perspective ray, only need make vernier slide block the keep left alignment pin or the alignment pin of keeping right, repeat (2) and get final product.
Draw the large radius arc step:
Adopt the drawing instrument for drawing circular arc in perspective of chuck guiding rod-type guiding attitude reference device, picture large radius arc step is as follows:
(1) tangent line of known drawn circle and point of contact and radius R are according to tgB=D
1/ R determines B, the center of circle on drawing instrument for drawing circular arc in perspective longitudinal axis right side then guide post take back; Drawing instrument for drawing circular arc in perspective longitudinal axis left side, the center of circle then guide post takes over, and regulates guide post and fastening guide positioning pin.
When if the reading on R and the base plate in " R " curve map chi is identical, then need not calculates the position that can directly guide post be allocated to the reading identical and also fix with R.
(2) made the point of contact straight line vertical (extended line of this straight line is crossed the center of circle) with tangent line.
(3) will rule "+" directrix in hole overlaps with "+" line that (2) are done, and paintbrush inserts in the line hole, and promoting base plate can map.
Adopt the drawing instrument for drawing circular arc in perspective picture large radius arc step of chuck Worm-gear type guiding attitude reference device as follows:
(1) tangent line of known drawn circle and point of contact and radius R are according to tgB=D
1/ R determines B, and the center of circle is on drawing instrument for drawing circular arc in perspective longitudinal axis right side, and then thumb wheel is to setting aside, and vernier is moved to the left; The center of circle in drawing instrument for drawing circular arc in perspective longitudinal axis left side then thumb wheel upwards dial, vernier moves right.
When if the reading on R and the base plate in " R " curve map chi is identical, then need not calculates and directly thumb wheel to be allocated on the position that makes the vernier sensing stadia reading identical with R.
(2) made the point of contact straight line vertical (extended line of this straight line is crossed the center of circle) with tangent line.
(3) will rule "+" directrix in hole overlaps with "+" line that (2) are done, and paintbrush inserts in the line hole, and promoting base plate can map.
Accompanying drawing has been described embodiments of the invention:
Fig. 1: steering principle figure
Fig. 2: perspective schematic diagram
Fig. 3: drawing instrument for drawing circular arc in perspective schematic diagram
Fig. 4: the drawing instrument for drawing circular arc in perspective vertical view of chuck guiding rod-type guiding attitude reference device
Fig. 5: the drawing instrument for drawing circular arc in perspective upward view of chuck guiding rod-type guiding attitude reference device
Fig. 6: roller devices profile
Fig. 7: directed selecting arrangement profile
Fig. 8: chuck, guide post steering mechanism profile
Fig. 9: guide post detail drawing
Figure 10: hand brake apparatus profile
Figure 11: the drawing instrument for drawing circular arc in perspective profile of chuck guiding rod-type guiding attitude reference device
Figure 12: the vertical view of the drawing instrument for drawing circular arc in perspective of chuck Worm-gear type guiding attitude reference device
Figure 13: the upward view of the drawing instrument for drawing circular arc in perspective of chuck Worm-gear type guiding attitude reference device
Figure 14: with one of drawing instrument for drawing circular arc in perspective mapping situation
Figure 15: with two of drawing instrument for drawing circular arc in perspective mapping situation
Figure 16: with three of drawing instrument for drawing circular arc in perspective mapping situation
Fig. 1: steering principle figure.D is a wheelbase, and R is a turning radius, and B is the directive wheel corner.
Fig. 2: perspective schematic diagram.A is that S is a sighting distance by the angle of perspective object and picture, and L is the distance of vanishing point M to viewpoint P.
Fig. 3: drawing instrument for drawing circular arc in perspective schematic diagram, A are that S is a sighting distance by the angle of perspective object and picture, and D is a wheelbase, and B is the directive wheel corner.
Fig. 4: the scribing edge [6] of base plate [1], roller [2], line slide rule [3], handle runner [4], slide rule handle [5], slide rule, line hole [7], guide positioning pin [8], gathering sill [9], about to select alignment pin [10], dial [11], hand cap [12], perspective angle be 30 °, 45 °, 60 ° figure chi [13], figure chi [14], chuck [15], directive wheel [16], the chuck jack [17] that radius is the R reading.Fig. 5: base plate [1] roller [2] line slide rule [3] line hole [7] gathering sill [9], about select alignment pin [10], roller shaft briquetting [18], non-slip rubber [19], guide post [20], guide positioning pin screw hole [21], guide post graduation mark [22], directive wheel [16], chuck jack [17].
Fig. 6: be C-C profile among Fig. 5, roller devices is made up of with the roller shaft [23] of roller shaft briquetting [18] edge folder roller [2], base plate [1].
Fig. 7: be E-E profile among Fig. 5, directed selecting arrangement is made up of base plate [1], (left side or right) alignment pin [10], gathering sill [9].
Fig. 8: be D-D profile among Fig. 5, chuck, guide post steering mechanism are made up of base plate [1], chuck [15], directive wheel [16], guide post [20], the rectangle race [24] of chuck aligns mutually with rectangle race [25] on the guide post, and middle edge accompanies the wheel shaft of directive wheel.
Fig. 9: guide post detail drawing, the rectangle race [25] on graduation mark [22], guide positioning pin screw hole [21], the guide post.
Figure 10: be B-B profile among Fig. 5.The hand brake apparatus is made up of hand cap [12], spring [26], base plate [1], suction tray [27], non-slip rubber [19].
Figure 11: be A-A profile among Fig. 5.Base plate [1], line slide rule [3], containment type guide rail [28], by containment type guide rail [29], handle runner [4], slide rule handle [5], line hole [7], guide positioning pin [8], gathering sill [9], guide post [20], chuck [15], directive wheel [16].
Figure 12: base plate [1], roller [2], line slide rule [3], handle runner [4], slide rule handle [5], slide rule scribing edge [6], line hole [7], chute [30], about select alignment pin [10], vernier slide block [31], thumb wheel [32], dial [11], the perspective angle is 30 ° 45 °, 60 ° figure chi [13], figure chi [14], hand cap [12], chuck [15], directive wheel [16], the chuck jack [17] that radius is the R reading.
Figure 13: base plate [1], roller [2], line slide rule [3], line hole [7], roller shaft briquetting [18], non-slip rubber [19], chute [30], about select alignment pin [10], vernier slide block [31], worm bearing [35], thumb wheel [32], worm screw [33], worm gear [34], directive wheel [16], chuck jack [17].
Figure 14: during for corner B=0, drawing instrument for drawing circular arc in perspective mapping situation.
Figure 15: during for corner 0＜B＜90 °, drawing instrument for drawing circular arc in perspective mapping situation.
Figure 16: have an X-rayed the situation when illustrating the perspective ray that disappears to right vanishing point with drawing instrument for drawing circular arc in perspective.
Actual effect of the present invention:
One, volume is little, weight is light, cost is low. The present invention's actual size is suitable with general drafting instrument set square, can be the series of products of several different moduluses. In selection, except roller and guide wheel system can adopt metal or other hard material, other parts all can be adopted The lightweight transparent material that meets the demands with lucite or its intensity. So compare with CN85202234U with Chinese patent CN1034694A, the present invention just demonstrates the characteristics that volume is little, weight is light, easy to carry.
Two, dexterity simple in structure. The all parts of the present invention all are contained on the base plate, meet on the chart board that requires that charts as long as be placed on one, can fulfil assignment. The figure board size is not had specific (special) requirements, more be not similar to the various external member transposing such as Chinese patent CN85104485A and the specific (special) requirements of CN85205030U and U.S. Pat-865140 pair chart board.
Three, easy to use. In the perspective view drawing process, common people get used to the perspective relation according to point, line, surface, from integral body to local or from outside to inside or from inside to outside mapping. When drawing certain part, the operation of left and right sides perspective ray hockets, and Russian Patent SU901075 and U.S. Pat 170832 all exist a common problem, can not adapt to exactly the practice of custom. Use these two kinds of plotters will finish earlier all perspective rays of picture one side, make again all perspective rays of opposite side, otherwise will regulate continually the differential gear of its roller, whenever alternately once will regulate once, very inconvenient, certainly such instrument also is difficult for promoting. And design of the present invention fully takes into account this problem, and its practice is just determined by left and right sides included angle A, the A of perspective object and picture earlier before mapping1, make graduation mark show B, B1The position of left and right sides alignment pin, in the mapping afterwards, side conversion in the left and right sides only is guide post or vernier slide block keep right alignment pin or the alignment pin that keeps left. Therefore, this drawing instrument for drawing circular arc in perspective convenience simple to operate, accurate, and can adapt to the mapping custom, easily accept for the user.
Line ruler part, the line ruler of U.S. Pat 170832 is owing to the relation of structure, and its scribing edge is stopped that by two rollers the length of the perspective ray of drawing is restricted inevitably. And the line ruler among the present invention adopts the containment type guide rail, can about sliding stretching, satisfied The to the left and right requirement of lead-in wire.
Consider and generally ask when perspective included angle A to get 30 °, 45 °, 60 ° custom, the scale of corresponding sighting distance S when having in the present invention three figure chis to represent respectively A=30 °, 45 ° or 60 ° on the base plate, when guide post or vernier slide block sensing S position, corner B satisfies the relation of tgB=DtgA/S. Therefore, need not do any calculating before the mapping, only needing guide post or vernier slide block are allocated to angle is that the figure chi scale of A represents on the position of sighting distance S that this moment, the directive wheel corner was B, can map. When drawing more than half circular arc, if R is identical with scale R reading on " R " figure chi, when guide post or vernier slide block sensing R position, corner B satisfies tgB=D1The relation of/R. Only needing guide post or vernier slide block are allocated to " R " figure chi scale is on the position of R, and this moment, the directive wheel corner was B, can map. On the step of using, the present invention has saved and " had amplified sample " and the process of " looking for a trace " in the past, saves time, laborsaving.
Four, production and assembling technology are simple. Russian Patent SU901075 and U.S. Pat 17 0832 are too complicated at the design aspect of mechanism, and especially the latter's transmission mechanism is many, and the assembling of the stepless speed-regulating device between two truncated cone-shaped wheels requires very high. And parts do not have special form among the present invention, all can adopt the injection moulding forming process, what two rollers and directive wheel adopted is sliding bearing, and what adopt between the chuck jack on the base plate and the chuck is movingly, is easy to produce and assembling.
But five amplitudes of accommodation are big. U.S. Pat 170832 is two round platforms because regulating differential gear, when r1/r2=1, R → ∞, and when r2 gets maximum, r1 non-vanishing (r1 ≠ 0), r1/r2＞0 then, this moment R ≠ 0, on the structure inevitably limitation affected its scope of application. Design feature of the present invention is so that adjustable directive wheel corner (0 °≤B≤90 °) between 0 °-90 °, and the codomain of R is 0 → ∞ (0≤R＜∞), thereby have fully Adjustable range.
In sum, the present invention has that volume is small and exquisite, simple in structure, cost is low, be easy to production and assembling, easy to use, degree of amplitude modulation is big, take work area and space little, do not hinder the characteristics such as mapping, applied range. Can be used for building, the design of the design in planning and designing, railway, highway, bridge, culvert, tunnel and mechanical engineering, boats and ships, aircraft, Design of Industrial Product and stage design, industrial art, advertisement art etc. also can be as these professional students' academic program apparatus.
Claims (10)
1, drawing instrument, a kind of drawing instrument for drawing circular arc in perspective that is used for drawing the ray (perspective ray) come from a fixed point (vanishing point) or the center of circle at the circular arc of a fixed point.It comprises: base plate, line ruler, two diameters identical and roller that can rotate freely around axle respectively on same axis, the guiding attitude reference device that has a directive wheel, left-right orientation selecting arrangement and figure chi and brake apparatus.It is characterized in that: its two rollers on same axis can rotate freely around axle respectively; Its line ruler can about sliding stretching; The guiding attitude reference device that can regulate the fixed base plate moving direction and have a directive wheel; A line hole; The left-right orientation selecting arrangement; The figure chi; Has a hand brake apparatus at least.
2, according to the described drawing instrument for drawing circular arc in perspective of claim 1, it is characterized in that: have two diameters, thickness, material identical on the base plate, the roller that it is fixed on the same axis of base plate and can rotates freely around axle.
3, according to the described drawing instrument for drawing circular arc in perspective of claim 1, it is characterized in that: the back side of base plate has one by one pair of containing that cooperatively interacts and the line slide rule that is originally combined by containment type (swallow-tail form or rectangle) guide rail and base plate, this slide rule has a scribing edge that parallels with the axis described in the claim 2, and can also can be fixed on the guide rail by sliding stretching about guide rail.
4, according to the described drawing instrument for drawing circular arc in perspective of claim 1, it is characterized in that: the guiding attitude reference device that can regulate the fixed base plate moving direction and have a directive wheel comprises the dial, the gathering sill that are similar to graphometer on the base plate, is contained in guide positioning pin, guide post, chuck and directive wheel on the base plate.Chuck is stuck in the chuck jack on the base plate and with it movingly; The axis direction of chuck has a rectangle race, and an end of guide post has same rectangle race, and two races align, and edge accompanies the wheel shaft of directive wheel in the race; The directive wheel that contacts with drawing sways in race, and can turn to chuck; Guide positioning pin passes gathering sill and links to each other with guide post; The other end of guide post has a graduation mark to indicate the corner of directive wheel on dial.
5, according to claim 1 or 4 described drawing instrument for drawing circular arc in perspective, it is characterized in that: the left-right orientation selecting arrangement is in the both sides of guide post and can be separately fixed at the left alignment pin that its bearing pin of optional position slides in the gathering sill, right alignment pin in groove.
6, according to the described drawing instrument for drawing circular arc in perspective of claim 1, it is characterized in that: the guiding attitude reference device that can regulate moving direction on the fixed base plate and have a directive wheel comprises dial, the chute on the base plate and is contained on the base plate band worm gear and the chuck of directive wheel is housed and the worm screw and the vernier slide block of band thumb wheel.Chuck is stuck in the chuck jack on the base plate and with it movingly; The axis direction of chuck has a rectangle race, and the coaxial and race of the worm gear that the bottom surface of chuck and a center have same rectangle race aligns mutually, and edge accompanies the wheel shaft of directive wheel in the race; The directive wheel that contacts with drawing sways in race, and can together turn to chuck and worm gear; There is the dial of the similar ruler parallel with worm screw in the front of base plate; A worm screw that is meshed with worm gear is equipped with at the back side of base plate, and thumb wheel is coaxial with worm screw and this axle is parallel with the axis of two rollers; Being parallel to the vernier slide block that slides in the chute of worm screw on the base plate has double wedge with worm engaging, can move on dial with the rotation of worm screw, indicates worm gear chuck and directive wheel corner.
7, according to claim 1 or 6 described drawing instrument for drawing circular arc in perspective, it is characterized in that: the left-right orientation selecting arrangement is in the both sides of vernier slide block and can be separately fixed at the left alignment pin that its bearing pin of optional position slides in the chute, right alignment pin in groove.
8, according to the described drawing instrument for drawing circular arc in perspective of claim 1, it is characterized in that: a line hole is arranged on the base plate, and this hole is positioned on the perpendicular bisector of the axis that is contained in two rollers on the base plate; Also having with the line hole on the base plate is two orthogonal "+" word directrixes of intersection point.
9, according to the described drawing instrument for drawing circular arc in perspective of claim 1, it is characterized in that: the hand brake apparatus comprises hand cap, spring and suction tray.Hand cap on the base plate passes spring and links to each other with suction tray with base plate; Suction tray and drawing contact portion can be coated with the subsides non-slip rubber.
10, according to the described drawing instrument for drawing circular arc in perspective of claim 1, it is characterized in that: the figure chi of the corresponding corner of directive wheel and quilt perspective object and picture angle were respectively 30 °, 45 ° and 60 °, the figure chi of the corresponding corner of directive wheel during the readings signify sighting distance when indication readings signify radius was arranged on the base plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90100981 CN1054217A (en) | 1990-02-26 | 1990-02-26 | Drawing instrument for drawing circular arc in perspective |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90100981 CN1054217A (en) | 1990-02-26 | 1990-02-26 | Drawing instrument for drawing circular arc in perspective |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1054217A true CN1054217A (en) | 1991-09-04 |
Family
ID=4876891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90100981 Pending CN1054217A (en) | 1990-02-26 | 1990-02-26 | Drawing instrument for drawing circular arc in perspective |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1054217A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106585221A (en) * | 2016-12-30 | 2017-04-26 | 商丘师范学院 | Tool for drawing perspective three-dimensional diagram |
| CN109606733A (en) * | 2018-12-07 | 2019-04-12 | 西安飞机工业（集团）有限责任公司 | A kind of measurement method and measuring device of frontal windshield rain brush corner |
| CN112406374A (en) * | 2020-11-30 | 2021-02-26 | 南宁学院 | Mechanical drawing instrument |
-
1990
- 1990-02-26 CN CN 90100981 patent/CN1054217A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106585221A (en) * | 2016-12-30 | 2017-04-26 | 商丘师范学院 | Tool for drawing perspective three-dimensional diagram |
| CN106585221B (en) * | 2016-12-30 | 2018-04-06 | 商丘师范学院 | A kind of instrument for drawing perspective three dimensional figure |
| CN109606733A (en) * | 2018-12-07 | 2019-04-12 | 西安飞机工业（集团）有限责任公司 | A kind of measurement method and measuring device of frontal windshield rain brush corner |
| CN112406374A (en) * | 2020-11-30 | 2021-02-26 | 南宁学院 | Mechanical drawing instrument |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1054217A (en) | Drawing instrument for drawing circular arc in perspective | |
| CN2079571U (en) | Drawing instrument for drawing cycle arc in perspective | |
| CN210821564U (en) | Blackboard drawing ruler mechanism | |
| CN205387016U (en) | Novel drawing compass who can be used to civil engineering drawing | |
| CN2818171Y (en) | Multifunctional magnetic ruling compass | |
| CN218702396U (en) | Drawing tool | |
| CN202115197U (en) | Multi-functional surveying and mapping instrument | |
| CN2053988U (en) | F shaped changeable ruler and its mating drawing-board | |
| CN2813329Y (en) | Multifunction special drawing ruler | |
| CN2269317Y (en) | Universal ruler | |
| CN220429726U (en) | Cheng Zhitu ruler for construction students | |
| CN204915030U (en) | Intelligence ruler | |
| CN2310680Y (en) | Multifunctional drawing rule | |
| CN2482054Y (en) | Parallel rule device for compensation of error caused by violating Abbe's principle in measuring length | |
| CN2129693Y (en) | Multifunction grading device | |
| CN220281005U (en) | Design rule for graphic design | |
| CN208760278U (en) | A kind of high-precision angle parallel ruler | |
| CN210478226U (en) | Mechanical force-return compasses | |
| CN210309684U (en) | Safety compasses ruler | |
| CN206248069U (en) | A kind of hand-operated wheel type range finding dolly | |
| CN2308515Y (en) | Multifunctional roller fast plotting instrument | |
| CN2318103Y (en) | Gauge for excess of loading cargo limit of railway | |
| CN2099037U (en) | Multi-purpose drawing ruler of digit displaying type | |
| CN2127913Y (en) | Multi-purpose compasses | |
| CN2743145Y (en) | Swing arm type ellipsograph |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |