CN86201930U

CN86201930U - Foldable ellipse instrument with cross sliding chute

Info

Publication number: CN86201930U
Application number: CN 86201930
Authority: CN
Inventors: 刘钰
Original assignee: Individual
Current assignee: Individual
Priority date: 1986-03-28
Filing date: 1986-03-28
Publication date: 1988-02-24

Abstract

The utility model discloses an instrument capable of drawing ellipse which belongs to an improvement of an ellipse instrument with cross sliding chute, comprising a grade separation cross sliding chute frame, a brush rack and three supporting feet. Because the orthogonal sliding chutes are stagger, various difficulties brought by the crossing point of the cross is precluded. Due to the connection mode, the lower sliding chute is capable of rotating around the crossing point, in this way, the instrument is capable of being folded into a plane status after is used. In addition, the arrangement of the supporting feet makes a pen is free form being obstructed in drawing process. The instrument has the advantages of accurate drawing, convenient operation and capability of drawing a very small ellipse and an ellipse with dashed line. Besides, the utility model is characterized in that is none of the obstructing problem of the supporting feet, so the range of drawing is enlarged obviously. The foldable ellipse instrument with cross sliding chute is a good tool in many aspects, such as engineering drawing, geometry teaching, art design, baiting line drawing, etc.

Description

Foldable ellipse instrument with cross sliding chute

The utility model is a kind of improvement to the cross chute ellipsograph.

According to cross chute principle design ellipsograph, many important advantages are arranged on principle.But, structurally demonstrate fully the various advantages of this principle, design multiple functional, simple and practical ellipsograph, some long-term unsolved technical difficulties are but arranged.

1. 8 years patent DT2742352 are a kind of comparatively advanced cross chute ellipsographs, but conical centre's axle that it adopted will swing through the cross intersection point time to the left and right, influence the drawing accuracy.

2. putting on display the ellipsograph that exchanges with the Liu Yu of Northwestern Polytechnical University December in Aug. 1st year in the draughtsmanship academic conference of Jinan China Engineering Graphics Society is the cross chute ellipsograph of representative, because the occupy-place of slide block can not be drawn special little ellipse; Owing to lift the pen difficulty, can not draw dotted ellipse; After finishing, can not fold packing collection inconvenience.

3. the Liu Yu of Northwestern Polytechnical University was in 8 or five years application utility model patents, and application number is 85204967 grade separation type cross chute ellipsograph, can draw special little ellipse and dotted ellipse, but drew the big leg problem of being in the way that has when oval; After finishing, can not fold the collection of inconvenience packing.

The purpose of this utility model is to overcome its two shortcomings when keeping the various advantages of above-mentioned grade separation type cross chute ellipsograph, makes it more to become perfect.This purpose is achieved in that according to the cross chute principle, structurally still adopts the grade separation type runner frame, makes in length and breadth that chute staggers up and down, all difficulties of avoiding the cross intersection point to be brought; The vertical runner that occupy the top is double-deck big degree of depth pass-through type chute, makes paintbrush stressed good, and can do a spot of moving up and down; The sideslip groove that occupy the below is common pass-through type chute, its outer end is connected by connecting rod, terminal pad and attachment screw with the lower floor middle part of vertical runner, can rotate around terminal pad after unclamping screw, so that instrument in can be folded into flat state after finishing, is convenient to the packing collection.Two fixed feet occupy the outer end of vertical runner two ends adjutage respectively, and sideslip groove two ends do not have leg, are vacant state, have solved the be in the way problem of leg to paintbrush.Vertical runner left end adjutage outer end adds a lateral legs in addition, to guarantee the stable of instrument operating position, is recoverable to after finishing.

The utility model is provided by following examples and accompanying drawing thereof.

Fig. 3 is a vertical view of the present utility model.

Fig. 1 be Fig. 3 from the G-G section front view along the B direction.

Fig. 2 be Fig. 1 from the H-H section side view along the A direction.

This instrument is made up of guiding mechanism, paintbrush frame and leg three parts by its effect.

Guiding mechanism comprises runner frame and slide block.Vertical runner is the double-deck chute of being made up of upper strata 4 and lower floor 5.The two ends of sideslip groove 12 are connected with vertical runner by connecting rod 11, terminal pad 10 and attachment screw 9 and constitute runner frame.Unclamp attachment screw 9, the sideslip groove can turn to the position parallel with the sideslip groove around terminal pad.Slide block 3 and translot no-float can slide along the sideslip groove.

As shown in Figure 1, the paintbrush frame comprise handle 1, with its round bar partly pass the slide block center and the last central shaft 17 that connects with handle, the upper slide bar 18 that can in last central shaft dop, slide, with its round bar partly pass the sideslip groove and the following central shaft 13 that is connected with upper slide bar one end, can be in descending the central shaft dop slip and drop shot 15, positioning pointer 14 and the paintbrush 16 parallel with upper slide bar.Between slide block top and the handle cap little spring is arranged.Said structure makes the paintbrush frame also can do a spot of moving up and down when doing elliptic motion.

The outer end of sideslip groove lower floor two ends adjutage is equipped with fixed feet 7 and 19 respectively.Left side leg root is adorned a side direction activity leg 8, and this leg can go to the side by means of pivoted arm 6 when working.And in regaining with finishing the back, so that whole instrument is flat state.Above-mentioned leg configuration mode has solved the problem of being in the way of leg, has enlarged the drawing scope.

After providing the length radius, use this instrument to draw ellipse and can follow these steps to carry out:

1. draw the direction line: mutually perpendicular major and minor axis direction line draws on the mapping position.

2. regulate the length radius: after instrument was launched, the distance of regulating nib 16 and following central shaft 13 made it to equal major radius; The position of central shaft 17 on upper slide bar 18 in the adjusting is so that nib equals short radius to the distance of last central shaft.

3. instrument location: fixed feet 7 and 19 is placed the appropriate location of long axis direction line, so that positioning pointer is pointed to the short-axis direction line.

4. draw: left hand is pressure activity leg pivoted arm 6 gently, and one week of handle is gently pressed and clockwise rotated to the right hand, can become figure.Because the effect of spring, finish oval joint after, release handle 1, nib promptly lifts voluntarily, leaves paper, guarantees that joint is good.

Utilize this instrument can draw the length diameter less than the distance between instrument two fixed feet, the difference of length diameter is less than various solid lines and the dotted ellipse of chute length.

Claims

1, a kind of collapsible grade separation cross chute ellipsograph, it is characterized in that guiding mechanism is that runner frame, slide block are formed, upper and lower two layers of chute are formed double-deck chute, the two ends of sideslip groove 12 respectively are connected with the terminal pad that is loaded on lower floor chute middle part by a connecting rod, the sideslip frame can rotate around terminal pad, outer end at sideslip groove lower floor two ends adjutage is equipped with fixed feet 7 and 19 respectively, left side leg root is adorned a side direction activity leg 8, positioning pointer 14 and paintbrush 16 are housed on drop shot 15, passing the slide block center has a central shaft 17, and passing the sideslip groove has a central shaft 13.

2, collapsible grade separation cross chute ellipsograph according to claim 1 is characterized in that there is a handle 1 upper end of paintbrush frame.

3, collapsible grade separation cross chute ellipsograph according to claim 2 is characterized in that a little spring is being arranged above the slide block and between the handle cap.