CN2053988U - F shaped changeable ruler and its mating drawing-board - Google Patents

Abstract

The utility model relates to an F-shaped changeable ruler and the mating drawing-board thereof. The F-shaped changeable ruler is mainly characterized in that an F-shaped ruler body is composed of an end ruler, a main ruler and a vice-ruler, wherein, the vice-ruler can conveniently glide along the main ruler, and can do horizontal rotation around a certain shaft; the rotation angle value is indicated immediately by a dial. Using the tool can omit triangular plates and protractors, and can replace a drawing machine and flexibly and conveniently draw on drawing papers. Using the tool can receive the effect of simplifying drawing tools and steps and enhancing drawing efficiency and precision.

Description

F shaped changeable ruler and its mating drawing-board

The present invention relates to a kind of improvement of drawing instrument.

T square and supporting with it right-angle side drawing board are the main drawing instruments that still is widely used as non-professionality design occasions such as school and factory up to now, use this kit to draw following deficiency is arranged, when making vertical line or vertical parallel lines, arbitrarily angled line, need cooperate just with instrument set square, the protractor that other establishes and to finish, when making parallel lines at any angle, then more show the deficiency of this kit.Therefore, use this cover instrument mapping, its efficient is lower.In addition, when drawing long line, because of the long cause of the arm of force, in the end of main scale section, the slight of drawing pen guiding ruler body firmly can cause that all the following of main scale datum level wafts, and causes the downslide misalignment of line tail, though and the drawing instrument that multinomial function is arranged has many convenience of drawing, but complex structure, price height, uncomfortable large-scale popularization.

The present invention is intended to provide a kind of improved drawing rule and supporting with it chart board, can overcome the shortcoming of traditional T square plotting unit, and higher drawing efficiency is arranged, and makes simultaneously simply, and is with low cost, suitable applying.

Design of the present invention is to increase the slide block that an energy and T square main scale front end facade are slidingly matched on the T square basis, slide block is subjected to being fixed near the constraint of the slide rail of T square main scale rear end facade simultaneously, expanding surface is established an axis hole before slide block, be equipped with one and can pay chi as what certain limit horizontally rotated around this hole axis, constitute a variable F type chi, the rotation of paying chi will drive an angle indicating dial, the angle indicating dial can directly be read the angle value of paying the chi center line or paying relative vertical line of chi station meter upper thread or horizontal line (comprising and main scale station meter upper thread) thus, in conjunction with being set to fixing slide block and paying the locking device of chi position and to main scale, the move operation of slide block and pair chi, just can be on the drawing and omit under the situation of set square and protractor easily victory and just make various parallel lines, various vertical lines, arbitrarily angled line is especially made at any angle parallel lines and can be experienced its facility especially.

For long the causing under the afterbody figure line that overcomes T word main scale waftd, need to improve the end chi and the chart board of T square, make the drawing board side one-tenth of holding the interior facade of chi and contacting with it be with mobile pair that makes up guide passage, and the one main scale locking position and the releasing device that can match with the opposite side facade of chart board is set at T square main scale afterbody.

Described in detail again below in conjunction with the enforcement of accompanying drawing this device

Accompanying drawing 1 is the variable chi plane of F type.

The variable chi of F type is paid chi (7) end chi (6) slide block (5) slide rail (4) angular readings dish (8) main scale position locking mechanism (2) (11) (12) pair chi position local device (9) aciculiform slippage wheel (a 3) slide rail screw by main scale (10) and is formed.Wherein main scale (10) front end facade and slide block (5) preceding in the facade partial shape that contacts constitute moving of band prismatic combination guide passage and pay, and particularly the last rafter crest line of main scale (10) front end facade has outstanding distance than the middle part crest line, shown in accompanying drawing 3 main scale A-A profiles: the facade partial shape that contacts constitutes and is with half garden shape guide passage and gapped moving to pay in main scale (10) rear end facade and slide block (5) back, the last rafter crest line of its gap length and main scale (10) front end facade is than relevant the ining succession of size that outstanding distance is arranged of middle part crest line, generally be not less than 1mm, end chi (6) partial shape that contacts with the chart board end face constitutes moving pair of prismatic combination guide passage.Illustrated as accompanying drawing 2 end chi B-B profiles and accompanying drawing 4, accompanying drawing 5 supporting chart board planes and center line profile: slide rail (4) cross section is that garden shape and slide block (5) constitute the pivot kinematic pair; Paying chi (7) can rotate in 0 ° of-180 ° of scope around the preceding expanding surface axis hole of slide block (5) axis; Its angular dimension with respect to vertical direction or horizontal direction is indicated by angular readings dish (8); Slide block (5) can rotate in 0 ° of-270 ° of scope around slide rail (4).These characteristics can help when some drawing situation need not be paid chi, remove and pay chi.Slide rail (4) is a kind of filamentous that is made of elastomeric material, getting the string fixed form is fixed near the facade of main scale (10) rear end, and can obtain tightening by screw (1), be fixed on main scale (10) at slippage wheel (3) and go up the appropriate position, its effect is that main scale (10) is divided a word with a hyphen at the end of a line easily, accelerates mapping efficient.

Another big characteristics of the variable chi of F type are that it is transformed again, remove end chi (6) and main scale position locking mechanism (2) (11) (12) and supporting with it chute, install additional at main scale (10) two ends and to be adapted to be installed on the blackboard, make the pulley gear of translational motion in the guide rail of certain form of lower edge, just can obtain the variable chi of F type of two ends band pulley gear as shown in Figure 6, then the variable chi of F type can open the auxiliary mapping that another new application promptly is used for blackboard for education.

A kind of improved drawing instrument has clearly been introduced in above-mentioned explanation---and F type changeable ruler and supporting chart board, its manufacturing process can be continued to use conventional T square and chart board manufacturing process. This improvement instrument is significantly than conventional tool in its contrast aspect the convenience of using, and does not also have too much differently from conventional tool on material and parts, and particularly it can also be used for the auxiliary mapping of blackboard for education, and therefore very widely application be arranged.

Claims (3)

1, a kind of variable chi of F type of paying chi (7) end chi (6) slide block (5) slide rail (4) angular readings dish (8) main scale position local device (2) (11) (12) pair chi position local device (9) slide rail tightening device (1) aciculiform slippage wheel (3) formation by main scale (10), it is characterized in that a, the facade partial shape that contacts constituted the band prismatic and pays in conjunction with moving of guide passage in main scale (10) front end facade and slide block (5) were preceding, and particularly the last rafter crest line of main scale (10) front end facade has outstanding distance a: b than the middle part crest line, the facade partial shape that contacts constitutes and is with half garden shape guide passage and gapped moving to pay in main scale (10) rear end facade and slide block (5) back, the last crest line of its gap length and main scale (10) front end facade generally is not less than 1mm than relevant the ining succession of size that outstanding distance is arranged of middle part crest line; C, end chi (6) partial shape that contacts with the chart board end face constitutes moving pair of band prismatic combination guide passage; D, slide rail (4) cross section is that garden shape and slide block (5) constitute the pivot kinematic pair; E, paying chi (7) can rotate in 0 ° of-180 ° of scope around the preceding expansion dead eye of slide block (5) axis, and its angular dimension that rotates with respect to vertical direction or horizontal direction is indicated by angular readings dish (8); F, slide block (5) can rotate in 0 ° of-270 ° of scope around slide rail (4).

2, the variable chi of F type according to claim 1 is characterized in that slide rail (4) is the filamentous that is made of a kind of elastomeric material, gets the string fixed form and is fixed near the facade of main scale (10) rear end, and can obtain tightening by screw (1).

3, according to the variable chi of the described F type of claim 1, it is characterized in that the variable chi of F type removes end chi (6) and main scale locking device (2) (11) (12) and reaches supporting with it chute, install at main scale (10) two ends that to be adapted to be installed in blackboard upper and lower along the pulley gear of doing translational motion in the guide rail of certain form additional.

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