阅读说明：本技术 一种工业曲线绘制仪 (Industrial curve drawing instrument ) 是由 郑渝涵 李卫华 张温馨 游景蛟 于 2020-06-02 设计创作，主要内容包括：本发明公开了一种工业曲线绘制仪,包括横梁、固定杆、转动杆、第一轮轴、第二轮轴第一轮体、第二轮体、第三轮轴、第一压轮、第四轮轴、第二压轮、第五轮轴、第三压轮、控制齿轮和控制带,第一轮体、第一压轮、第二压轮以及第三压轮使得控制带绷紧,第一轮体带动控制带进行移动,从而使传动齿靠近或远离控制齿轮,从而控制转动杆转动或者不转动。第一轮轴和第二轮轴平行且转动杆不转动的情况下,笔孔处的笔能够绘制直线,当第一轮轴和第二轮轴不平行不垂直且转动杆不转动的情况下,则笔能够绘制圆弧。配合转动杆的转动,当第一轮轴和第二轮轴不平行不垂直情况下,笔尖能绘制其他不规则弧线。(The invention discloses an industrial curve drawing instrument which comprises a cross beam, a fixed rod, a rotating rod, a first wheel shaft, a second wheel shaft, a first wheel body, a second wheel body, a third wheel shaft, a first pressing wheel, a fourth wheel shaft, a second pressing wheel, a fifth wheel shaft, a third pressing wheel, a control gear and a control belt. Under the parallel and not pivoted circumstances of dwang of first shaft and second shaft, straight line can be drawn to the pen of pen hole department, and under the non-perpendicular and not pivoted circumstances of dwang of first shaft and second shaft nonparallel, then the circular arc can be drawn to the pen. The rotation of cooperation dwang, under first shaft and the nonparallel out of plumb condition of second shaft, other irregular pitch arcs can be drawn to the nib.)

1. An industrial curve drawing instrument is characterized by comprising a cross beam, a fixed rod, a rotating rod, a first wheel shaft, a second wheel shaft, a first wheel body, a second wheel body, a third wheel shaft, a first pressing wheel, a fourth wheel shaft, a second pressing wheel, a fifth wheel shaft, a third pressing wheel, a control gear and a control belt, wherein the upper end of the fixed rod is fixed at the front end of the cross beam, the first wheel shaft is rotatably arranged at the lower end of the fixed rod, the first wheel body is fixedly arranged on the first wheel shaft, the third wheel shaft is rotatably arranged in the middle of the fixed rod, the first pressing wheel is fixedly arranged on the third wheel shaft, the rotating rod is axially positioned at the rear end of the cross beam, the control gear is fixedly arranged at the upper end of the rotating rod, the second wheel shaft is rotatably arranged at the lower end of the rotating rod, the second wheel body is fixedly arranged on the second wheel shaft, the fourth wheel shaft and the fifth wheel shaft are both rotatably arranged at the rear end of the cross beam, the second pressing wheel shaft and the third pressing wheel shaft are respectively fixedly arranged on the fourth wheel shaft and the fifth wheel shaft, the control area includes smooth area and control area, first wheel body, first pinch roller, second pinch roller and third pinch roller all compress tightly in smooth area, the control gear is located between first pinch roller and the third pinch roller on the crossbeam axial, first wheel body rotates and removes in order to drive the control area, be provided with the driving gear on the control area, driving gear and control gear engagement when the driving gear removes to control gear department, rotate on the crossbeam in order to drive the dwang, a hole has been seted up to the centre of crossbeam.

2. The industrial curve drawing instrument according to claim 1, further comprising a locking member and an outer tube, wherein the outer tube is fixed at the rear end of the cross beam, the rotating rod is arranged in the middle of the outer tube, the outer tube axially and radially limits the rotating rod, the locking member is arranged on the outer tube, when the transmission gear is engaged with the control gear, the locking member unlocks the rotating rod, the rotating rod rotates on the cross beam, when the transmission gear is separated from the control gear, the locking member locks the rotating rod, and the rotating rod is circumferentially positioned on the cross beam.

3. The industrial curve drawing instrument according to claim 2, wherein the locking member comprises a locking rod, a locking spring and a locking baffle, a locking hole is formed in the side wall of the outer tube, the locking rod is inserted in the locking hole, the locking baffle is installed at the end part, located outside the outer tube, of the locking rod, two ends of the locking spring respectively abut against the outer wall of the outer tube and the locking baffle, when the transmission gear is meshed with the control gear, the locking spring ejects the locking baffle in the direction away from the outer tube, the end part, located inside the outer tube, of the locking rod is separated from the outer wall of the rotating rod, and when the transmission gear is separated from the control gear, the control belt presses the locking baffle, so that the end part, located inside the outer tube, of the locking rod is pressed on the outer wall of the rotating rod to lock the rotating rod.

4. The industrial curve drawing instrument according to claim 3, wherein the control band comprises a locking region, the smooth region and the control region are arranged side by side, the control region is located on one side, away from the outer tube, of the smooth region, the locking region is located on one side, close to the outer tube, of the smooth region, a notch for the locking baffle to move is formed in the locking region, when the transmission gear is meshed with the control gear, the notch moves to the locking baffle, the locking baffle is pushed to the side wall of the notch by a locking spring, and when the transmission gear is separated from the control gear, the locking region is located outside the notch, and presses the locking baffle towards the side wall of the edge of the outer tube so as to lock the rotating rod.

5. The industrial curve plotter according to claim 4, wherein a first guide slope is provided on a side wall of the notch, a second guide slope having a shape matching the first guide slope is provided on an edge side wall of the locking baffle, and the first guide slope and the second guide slope cooperate to guide the locking baffle in and out of the notch during movement of the control band.

6. The industrial profile plotter of claim 4, wherein the edge sidewall and the notch sidewall of the locking region near the outer tube side extend upward along a normal direction of the locking region to form a pressing plate, and the pressing plate presses on the locking baffle.

7. The industrial curve drawing instrument according to claim 6, wherein the driving gear is located on the front surface of the control area, the height of the driving gear is greater than that of the pressing plate, the portion of the pressing plate located on the control gear is located below the control gear, the third pressing wheel is located above the second pressing wheel, and when the driving gear is located at the first pressing wheel or the third pressing wheel, the first pressing wheel or the third pressing wheel is located between the driving gear and the pressing plate.

8. The industrial curve drawing instrument according to claim 7, wherein the front end of the beam is provided with a feed back bucket, the rear end of the beam is provided with a discharge bucket, the discharge bucket is located behind the control gear in the axial direction of the beam, and when the two ends of the control band are respectively arranged in the discharge bucket and the feed back bucket, the opening edge of the discharge bucket and the opening edge of the feed back bucket support the back surface of the control band.

9. The industrial curve drawing instrument according to claim 3, wherein an elastic limiting plate is installed at the end part of the locking rod in the outer tube, an installation hole for the elastic limiting plate to deform and move is communicated with the edge of the locking hole, and when the driving gear and the control gear are separated, the locking rod extrudes the outer wall of the rotating rod through the elastic limiting plate.

10. The industrial curve drawing instrument according to claim 9, wherein a first friction line is arranged on one surface of the elastic limiting plate facing the rotating rod, an annular second friction line is arranged on the outer wall of the rotating rod, and the first friction line and the second friction line are opposite to each other in the axial direction of the locking rod.

[ technical field ] A method for producing a semiconductor device

The invention relates to an industrial curve drawing instrument, and belongs to the field of drawing tools.

[ background of the invention ]

The special curve drawing generally needs to be performed by means of a special tool, particularly industrial paper drawing, and under the condition that curves in various shapes need to be drawn, the curves which can be drawn by a single tool are relatively single, so that various drawing tools are needed, and the actual drawing requirements can be met. Different curve drawing tools cannot be used universally, and the drawing capability is greatly limited.

[ summary of the invention ]

The technical problem to be solved by the invention is to overcome the defects of the prior art and provide an industrial curve drawing instrument with stronger universality.

The technical scheme adopted by the invention is as follows:

an industrial curve drawing instrument comprises a cross beam, a fixed rod, a rotating rod, a first wheel shaft, a second wheel shaft, a first wheel body, a second wheel body, a third wheel shaft, a first pressing wheel, a fourth wheel shaft, a second pressing wheel, a fifth wheel shaft, a third pressing wheel, a control gear and a control belt, wherein the upper end of the fixed rod is fixed at the front end of the cross beam, the first wheel shaft is rotatably arranged at the lower end of the fixed rod, the first wheel body is fixed on the first wheel shaft, the third wheel shaft is rotatably arranged in the middle of the fixed rod, the first pressing wheel is fixed on the third wheel shaft, the rotating rod is axially positioned at the rear end of the cross beam, the control gear is fixed at the upper end of the rotating rod, the second wheel shaft is rotatably arranged at the lower end of the rotating rod, the second wheel body is fixed on the second wheel shaft, the fourth wheel shaft and the fifth wheel shaft are both rotatably arranged at the rear end of the cross beam, the second pressing wheel and the third pressing wheel are respectively fixed on the fourth wheel shaft and the fifth wheel shaft, the control area includes smooth area and control area, first wheel body, first pinch roller, second pinch roller and third pinch roller all compress tightly in smooth area, the control gear is located between first pinch roller and the third pinch roller on the crossbeam axial, first wheel body rotates and removes in order to drive the control area, be provided with the driving gear on the control area, driving gear and control gear engagement when the driving gear removes to control gear department, rotate on the crossbeam in order to drive the dwang, a hole has been seted up to the centre of crossbeam.

The invention has the beneficial effects that:

first wheel body, first pinch roller, second pinch roller and third pinch roller make the control area tighten, and first wheel body drives the control area and removes to make the driving gear be close to or keep away from the control gear, thereby the control dwang rotates or does not rotate. Under the parallel and not pivoted circumstances of dwang of first shaft and second shaft, straight line can be drawn to the pen of pen hole department, and under the non-perpendicular and not pivoted circumstances of dwang of first shaft and second shaft nonparallel, then the circular arc can be drawn to the pen. The rotation of cooperation dwang, under first shaft and the nonparallel out of plumb condition of second shaft, other irregular pitch arcs can be drawn to the nib. The special-shaped curves with different shapes can be drawn only by replacing different control belts. The invention greatly improves the universality of the drawing tool, the mode of drawing different curves is changed from the integral change of the tool to the change of the control belt, and the industrial curve drawing instrument can draw curves with more shapes by designing the number and the positions of the transmission teeth on the control belt.

The invention also comprises a locking piece and an outer tube, wherein the outer tube is fixed at the rear end of the cross beam, the rotating rod is arranged in the middle of the outer tube, the outer tube is used for axially and radially limiting the rotating rod, the locking piece is arranged on the outer tube, when the transmission gear is meshed with the control gear, the locking piece unlocks the rotating rod, the rotating rod rotates on the cross beam, when the transmission gear is separated from the control gear, the locking piece locks the rotating rod, and the rotating rod is circumferentially positioned on the cross beam.

The locking piece comprises a locking rod, a locking spring and a locking baffle, wherein the side wall of the outer tube is provided with a locking hole, the locking rod is inserted in the locking hole, the locking baffle is arranged at the end part of the locking rod positioned outside the outer tube, the two ends of the locking spring are respectively propped against the outer wall of the outer tube and the locking baffle, when the transmission gear is meshed with the control gear, the locking spring pushes the locking baffle out in the direction away from the outer tube, the end part of the locking rod positioned inside the outer tube is separated from the outer wall of the rotating rod, and when the transmission gear is separated from the control gear, the control belt extrudes the locking baffle, so that the end part of the locking rod positioned inside the outer tube is extruded on the outer wall of the rotating rod to lock the rotating rod.

According to the invention, the locking area, the smooth area and the control area are arranged side by side, the control area is positioned on one side of the smooth area far away from the outer tube, the locking area is positioned on one side of the smooth area near the outer tube, a notch for the movement of the locking baffle is formed in the locking area, when the transmission gear is meshed with the control gear, the notch moves to the position of the locking baffle, the locking baffle is pushed to the side wall of the notch by the locking spring, and when the transmission gear is separated from the control gear, the locking area is positioned outside the notch and extrudes the locking baffle towards the side wall of the edge of the outer tube so as to lock the rotating rod.

The side wall of the notch is provided with a first guide inclined plane, the side wall of the edge of the locking baffle is provided with a second guide inclined plane matched with the first guide inclined plane in shape, and the first guide inclined plane is matched with the second guide inclined plane to guide the locking baffle in and out of the notch in the moving process of the control belt.

According to the invention, the edge side wall of the locking area close to one side of the outer pipe and the notch side wall extend upwards along the normal direction of the locking area to form the extrusion plate, and the extrusion plate is extruded on the locking baffle.

The transmission gear is positioned on the front side of the control area, the height of the transmission gear is greater than that of the extrusion plate, the part of the extrusion plate, which is positioned on the control gear, is positioned below the control gear, the third pressing wheel is positioned above the second pressing wheel, and when the transmission gear is positioned at the first pressing wheel or the third pressing wheel, the first pressing wheel or the third pressing wheel is positioned between the transmission gear and the extrusion plate.

According to the invention, the front end of the cross beam is provided with the material returning barrel, the rear end of the cross beam is provided with the material discharging barrel, the material discharging barrel is positioned behind the control gear in the axial direction of the cross beam, and when two ends of the control belt are respectively arranged in the material discharging barrel and the material returning barrel, the opening edge of the material discharging barrel and the opening edge of the material returning barrel both support the back of the control belt.

The end part of the locking rod, which is positioned in the outer tube, is provided with the elastic limiting plate, the edge of the locking hole is communicated with the mounting hole for the elastic limiting plate to deform and move, and when the transmission gear and the control gear are separated, the locking rod extrudes the outer wall of the rotating rod through the elastic limiting plate.

The elastic limiting plate is provided with a first friction line on one surface facing the rotating rod, an annular second friction line is arranged on the outer wall of the rotating rod, and the first friction line and the second friction line are opposite in the axial direction of the locking rod.

Other features and advantages of the present invention will be disclosed in more detail in the following detailed description of the invention and the accompanying drawings.

[ description of the drawings ]

The invention is further described below with reference to the accompanying drawings:

FIG. 1 is a schematic structural diagram of an industrial curve drawing instrument in accordance with embodiment 1 of the present invention;

fig. 2 is a schematic sectional view of the direction a in fig. 1.

[ detailed description ] embodiments

The technical solutions of the embodiments of the present invention are explained and illustrated below with reference to the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.

In the following description, the appearances of the indicating orientation or positional relationship such as the terms "inner", "outer", "upper", "lower", "left", "right", etc. are only for convenience in describing the embodiments and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.

Example 1:

referring to fig. 1-2, the present embodiment provides an industrial curve drawing instrument, including a cross beam 1, a fixing rod 2, a rotating rod 3, a first wheel axle 4, a second wheel axle 5, a first wheel body 6, a second wheel body 7, a third wheel axle 8, a first pressing wheel 9, a fourth wheel axle 12, a second pressing wheel 14, a fifth wheel axle 11, a third pressing wheel 13, a control gear 18, a control belt, a locking piece, and an outer tube 15.

The upper end of the fixed rod 2 is fixed at the front end of the beam 1, and the fixed rod 2 is perpendicular to the beam 1. The first wheel shaft 4 is rotatably arranged at the lower end of the fixing rod 2, the first wheel body 6 is fixed on the first wheel shaft 4, the first wheel body 6 is rotatably arranged at the lower end of the fixing rod 2 around the axis of the first wheel shaft 4, and the first wheel shaft 4 is perpendicular to the cross beam 1 and the fixing rod 2. Dwang 3 is along axial and radial positioning at the rear end of crossbeam 1, and the upper end of dwang 3 is located the top of crossbeam 1, and dwang 3 is on a parallel with dead lever 2, and crossbeam 1, dead lever 2 and dwang 3 are located the coplanar. The second wheel shaft 5 is rotatably arranged at the lower end of the rotating rod 3, the second wheel body 7 is fixed on the second wheel shaft 5, and the second wheel body 7 is rotatably arranged at the lower end of the rotating rod 3 around the axis of the second wheel shaft 5. A pen hole is formed in the middle of the cross beam 1, a pen 10 is installed at the pen hole, and the pen point, the second wheel body 7 and the first wheel body 6 are simultaneously contacted on a horizontal paper surface.

When the first wheel axle 4 and the second wheel axle 5 are vertical, the axis of the fixed rod 2 does not move on the horizontal paper surface, and the second wheel body 7 rotates around the axis of the fixed rod 2. When the first wheel axle 4 and the second wheel axle 5 are maintained parallel, the contact tracks between the pen point, the second wheel 7 and the first wheel 6 and the paper surface are all straight lines (equivalent to infinite curvature radius). When the included angle between the first wheel shaft 4 and the second wheel shaft 5 is between 0 and 90 degrees (excluding 0 degree and 90 degrees), and the included angle between the first wheel shaft 4 and the second wheel shaft 5 is fixed, the trajectories of the pen point, the second wheel body 7 and the first wheel body 6 on the paper surface are three concentric circles, the projection intersection point of the axis of the first wheel shaft 4 and the axis of the second wheel shaft 5 on the horizontal paper surface along the normal direction of the paper surface is the center of the concentric circles, and the length of the center of the concentric circles and the connecting line of the pen point is the curvature radius of the trajectory of the pen point at the position of the pen point. The following is demonstrated in the following description of the trajectory of the pen tip, the second wheel 7 and the first wheel 6 on the paper surface as three concentric circles:

a rectangular coordinate system is established on a horizontal paper surface, the contact between the second wheel body 7 and the first wheel body 6 and the paper surface is approximately point contact, the contact point track of the second wheel body 7 on the paper surface is a second motion track, the contact point track of the first wheel body 6 on the paper surface is a first motion track, and the arc length of the second motion track is set as a parameter s₂The second wheel 7 contacts with a point P on the paper₂(x₂，y₂) The arc length of the first motion track is set as a parameter s₁The first wheel 6 contacts with a point P on the paper₁(x₁，y₁)，(ds₁)²＝(dx₁)²+(dy₁)²，(ds₂)²＝(dx₂)²+(dy₂)²；

P₁And P₂The spacing between them is constant l, thus (x)₁-x₂)²+(y₁-y₂)²＝l²；

A point P on the second motion track₂Has a tangent vector of (dx)₂/ds₂，dy₂/ds₂) Of the P₂Corresponding vector P₂P₁(x₁-x₂，y₁-y₂) Of the P₂Corresponding P₁The tangent vector is (dx)₁/ds₁，dy₁/ds₁)；

The angle between the second wheel 7 and the cross beam 1 is alpha, the second wheel 7 will not slip on the paper, and P is₂Tangent vector sum vector P₂P₁The angle is also alpha, cos alpha is the P₂Tangent vector sum vector P₂P₁Divided by the modulus of the two, i.e. cos α ═ x₁-x₂)dx₂/ds₂+(y₁-y₂)dy₂/ds₂)/(l*1)；

Corresponding P₁Is parallel to the vector P₂P₁The first wheel 6 does not slip on the surface of the paper, i.e. (dx)₁/ds₁)/(x₁-x₂)＝(dy₁/ds₁)/(y₁-y₂)；

By giving initial values, the equation set can be solved by using mathematical soft solution to prove.

When the first wheel axle 4 is perpendicular to the second wheel axle 5, the distance from the pen point to the axis of the fixed rod 2 is the minimum curvature radius of the curve which can be drawn by the industrial curve drawing instrument of the embodiment. The closer the first hub 4 and the second hub 5 are to being parallel, the larger the radius of curvature of the plotted curve. When the first wheel axle 4 and the second wheel axle 5 are parallel, the cross beam 1 travels along a straight line, equivalent to drawing a curve with infinite radius of curvature.

In combination with the above, when the rotating lever 3 rotates on the cross beam 1 while the first wheel 6 and the second wheel 7 move on the paper surface, the curvature radius of the curve drawn by the pen point on the paper surface changes. The skilled person can control the specific moving path of the pen point on the paper surface by matching the rolling process of the first wheel body 6 and the second wheel body 7 on the paper surface with the rotating process of the rotating rod 3 on the cross beam 1, so as to draw a target curve with a variable curvature radius.

The timing match between the rolling process of the first wheel body 6 and the rotating action of the rotating rod 3 depends on the control belt for regulation and control. The control band is made of a flexible material, such as rubber.

The third wheel shaft 8 is rotatably arranged in the middle of the fixing rod 2, the first pressing wheel 9 is fixed on the third wheel shaft 8, and the first pressing wheel 9 is rotatably arranged in the middle of the fixing rod 2 around the axis of the third wheel shaft 8. The fourth wheel shaft 12 and the fifth wheel shaft 11 are both rotatably arranged at the rear end of the cross beam 1, the second pressing wheel 14 is fixed on the fourth wheel shaft 12, the second pressing wheel 14 is rotatably arranged at the rear end of the cross beam 1 around the axis of the fourth wheel shaft 12, the third pressing wheel 13 is fixed on the fifth wheel shaft 11, and the third pressing wheel 13 is rotatably arranged at the rear end of the cross beam 1 around the axis of the fifth wheel shaft 11. The first hub 4, the third hub 8, the fourth hub 12, and the fifth hub 11 are arranged in this order in the normal direction of the paper, and the first hub 4, the third hub 8, the fourth hub 12, and the fifth hub 11 are parallel to each other. The corresponding first wheel body 6, the first pinch roller 9, the second pinch roller 14 and the third pinch roller 13 are arranged in sequence in the normal direction of the paper surface. The first wheel body 6 and the second pinch roller 14 press the back surface of the control belt, and the first pinch roller 9 and the third pinch roller 13 press the front surface of the control belt, so that the part of the control belt between the first wheel body 6 and the second pinch roller 14 is tensioned, and other parts of the control belt keep bending. The first wheel body 6 drives the control belt to move through the friction force between the first wheel body and the control belt in the process of rolling on the paper surface, and the rotating direction of the first wheel body 6 controls the moving direction of the control belt. This embodiment is described as controlling the movement of the belt from the second pressure roller 14 to the first wheel 6.

Specifically, the control band includes a smooth zone 20, a control zone 19, and a lock zone 21, with the lock zone 21, smooth zone 20, and control zone 19 being located side-by-side.

A control gear 18 is fixed at the upper end of the rotating rod 3, and the control gear 18 is positioned between the first pressing wheel 9 and the third pressing wheel 13 in the axial direction of the cross beam 1. The control zone 19 is provided with gear teeth 16, the specific number and spacing of the gear teeth 16 being designed in advance. The control belt moves the drive teeth 16 closer to or further away from the control gear 18 during the movement. When the transmission gear 16 moves to the control gear 18, the transmission gear 16 is meshed with the control gear 18, and the transmission gear 16 shifts the control gear 18, so that the control gear 18 drives the rotating rod 3 to rotate on the cross beam 1. The number of turns of the first wheel body 6 controls the moving distance of the control belt, the control belt moves a specific distance, and the transmission gear 16 at a specific position on the control belt can move to the control gear 18 to shift the control gear 18, so that the rotation of the first wheel body 6 can accurately control the rotation of the rotating rod 3. Different control belts are replaced, the number of the transmission teeth 16 is arranged differently, and the drawn curves are different.

The drive gear 16 is of a relatively hard texture to ensure that the control gear 18 can be dialed when moved to the control gear 18.

First pinch roller 9 and third pinch roller 13 all compress tightly at the front of smooth district 20, first wheel body 6 and second pinch roller 14 all compress tightly at the back of smooth district 20, the extrusion effort of first wheel body 6 and first pinch roller 9 on smooth district 20 is corresponding, the extrusion effort of second pinch roller 14 and third pinch roller 13 on smooth district 20 is corresponding, thereby guarantee to control the tight effect that rises of taking part between first wheel body 6 and second pinch roller 14, and prevent that control area part from producing the lateral deviation between first wheel body 6 and second pinch roller 14. At the same time, the first pressure wheel 9 and the third pressure wheel 13 can clear the drive teeth 16 in the control region 19 in the smooth region 20.

Wherein outer tube 15 is fixed at the rear end of crossbeam 1, and dwang 3 sets up in the centre of outer tube 15, and outer tube 15 and dwang 3 coaxial setting all are located the outer tube 15 outside upper end and the lower extreme of dwang 3 to avoid outer tube 15 to produce unnecessary influence to second wheel body 7 and control gear 18. Be provided with the location bearing in the outer tube 15, location bearing's outer lane and outer tube 15 inner wall are fixed, and location bearing's inner circle cover is on the outer wall of dwang 3 and fixed with the outer wall of dwang 3, and outer tube 15 utilizes the location bearing to carry out axial and radial spacing to dwang 3. In addition, a gap is reserved between the inner wall of the outer tube 15 and the outer wall of the rotating rod 3, so that the resistance of the rotating rod 3 in the middle of the outer tube 15 is reduced.

In order to control the moving track of the pen tip, the rotating rod 3 needs to be locked on the cross beam 1 without the transmission gear 16 engaging with the control gear 18, so as to prevent the rotating rod 3 from rotating on the cross beam 1. The locking piece sets up on outer tube 15, and when driving gear 16 and the meshing of control gear 18, locking piece unblock dwang 3, dwang 3 rotates on crossbeam 1, separates when driving gear 16 and control gear 18, and locking piece locking dwang 3, dwang 3 along circumference location on crossbeam 1.

Specifically, the locking member in the present embodiment includes a locking lever 23, a locking spring 24, and a locking shutter 25. The locking hole is opened to the outer tube 15 lateral wall, and locking lever 23 alternates in locking hole department, and the locking hole is radially fixed a position at locking lever 23 to locking lever 23, and locking baffle 25 installs and is located the tip in the outer tube 15 outside at locking lever 23, and the both ends of locking spring 24 are fixed respectively on outer tube 15 outer wall and locking baffle 25, and locking spring 24 is to the effort of locking baffle 25 outside towards outer tube 15. The locking spring 24 also prevents excessive rotation of the locking bar 23 at the locking aperture due to the fixed relationship between the locking spring 24 and the outer wall of the outer tube 15, thereby inhibiting circumferential rotation of the locking bar 23. The end of the locking lever 23 inside the outer tube 15 is fitted with a resilient limit plate 22.

When the driving gear 16 and the control gear 18 are separated, the control belt presses the locking baffle 25 to overcome the elastic force of the locking spring 24, the locking rod 23 presses the elastic limiting plate 22 to the outer wall of the rotating rod 3, and the friction force between the elastic limiting plate 22 and the outer wall of the rotating rod 3 locks the rotating rod 3, so that the rotating rod 3 cannot rotate on the cross beam 1 at the moment. When the transmission gear 16 is meshed with the control gear 18, the locking spring 24 ejects the locking baffle 25 in the direction away from the outer tube 15 so as to drive the locking rod 23 to move towards the outer side of the outer tube 15, the end part of the locking rod 23 located in the outer tube 15 drives the elastic limiting plate 22 to be separated from the outer wall of the rotating rod 3, so that the rotating rod 3 is unlocked on the cross beam 1, at the moment, the first wheel body 6 and the second wheel body 7 rotate on the paper surface, and meanwhile, the rotating rod 3 rotates on the cross beam 1. When elasticity limiting plate 22 locked dwang 3, possessed bigger area of contact between elasticity limiting plate 22 and the 3 outer walls of dwang, dwang 3 is more difficult for skidding, has guaranteed the stability when dwang 3 is locked. Meanwhile, the elastic limit plate 22 and the locking baffle 25 can effectively prevent the locking rod 23 from falling out of the locking hole after the control band is removed. If locking lever 23 takes place slight rotation in locking hole department simultaneously, elasticity limiting plate 22 also can guarantee to laminate as far as possible on dwang 3 outer wall through deformation when locking dwang 3.

Preferably, elasticity limiting plate 22 is provided with first friction line towards the one side of dwang 3, and the outer wall of dwang 3 is equipped with annular second friction line, and first friction line and second friction line are relative in locking lever 23 axial, therefore dwang 3 no matter how many angles rotate, the second friction line can be aimed at all the time to first friction line to ensure that first friction line and second friction line mutually support, promote the friction locking force when elasticity limiting plate 22 locks dwang 3.

Wherein the control zone 19 is located on the side of the smooth zone 20 remote from the outer tube 15 and the locking zone 21 is located on the side of the smooth zone 20 close to the outer tube 15. The way of controlling the axial movement of the locking flapper 25 with control in the locking rod 23 of this embodiment is:

the locking region 21 has a notch 27 formed at an edge thereof adjacent to the outer tube 15 for allowing the locking bar 25 to move. When the transmission gear 16 is engaged with the control gear 18, the notch 27 moves to the position of the locking baffle 25, and the locking spring 24 pushes the locking baffle 25 against the side wall of the notch 27, so that the locking rod 23 moves outwards in the axial direction of the locking rod, and the elastic limit plate 22 is separated from the outer wall of the rotating rod 3. The control band moves to change the notch 27 and the driving gear 16, the driving gear 16 and the control gear 18 are separated, the locking baffle 25 leaves from the notch 27, and the locking area 21 is positioned outside the notch 27 and presses the locking baffle 25 towards the side wall of the edge of the outer tube 15, so that the elastic limit plate 22 presses the outer wall of the rotating rod 3, and the rotating rod 3 is locked.

There may be a plurality of drive teeth 16, in this embodiment there is one control band, wherein each drive tooth 16 has a corresponding notch 27, and thus the number of drive teeth 16 is the same as the number of notches 27. In the case of the meshing transmission of the transmission gear 16 with the control gear 18, the locking flap 25 is at least partially housed in the corresponding notch 27, so as to ensure the separation between the elastic limit plate 22 and the outer wall of the swivelling lever 3. As soon as the driving tooth 16 has just separated from the control gear 18, the locking stop 25 has just completely moved out of the corresponding recess 27, so that the locking of the limit plate 22 on the rotary lever 3 is achieved. Therefore, the transmission time of the single transmission gear 16 to the control gear 18 is equal to the time of the locking baffle 25 moving in the corresponding notch 27, and the transmission gears 16 and the notches 27 with different shapes, sizes and numbers can enable the rotating rod 3 to rotate on the cross beam 1 by different angles, so that the design of the moving track of the pen point is more diversified.

In order to prevent the locking baffle 25 from entering the notch 27 too fast and causing excessive impact on the side wall of the notch 27, which causes the deviation of the control belt in the lateral direction, and to prevent the locking baffle 25 from being stuck in the notch 27, the side wall of the notch 27 of this embodiment is provided with two first guiding inclined planes 26, the two first guiding inclined planes 26 are opposite in the moving direction of the control belt, the side wall of the edge of the locking baffle 25 is provided with two second guiding inclined planes 28 matched with the first guiding inclined planes 26 in shape, the two second guiding inclined planes 28 are also opposite in the moving direction of the control belt, the first guiding inclined planes 26 are matched with the second guiding inclined planes 28, the corresponding second guiding inclined planes 28 slide on the corresponding first guiding inclined planes 26, so as to guide the locking baffle 25 to enter and exit the notch 27 in the moving process of the control belt, the movement of the lock flapper 25 in the axial direction of the lock lever 23 is made smoother and more consistent.

The edges of the first and second guide slopes 26 and 28 may be rounded to smooth the entry and exit of the lock gate 25 into the notch 27.

During the drawing process of the pen tip, the locking baffle 25 is always pressed on the side wall of the edge of the locking area 21 close to the outer tube 15 and the side wall of the notch 27. In the present embodiment, the side wall of the edge of the locking region 21 near the outer tube 15 and the side wall of the notch 27 extend upward along the normal direction of the locking region 21 to form the pressing plate 17, and the corresponding pressing plate 17 is located on the front surface of the locking region 21. The locking baffle 25 is pressed on the pressing plate 17, the pressing plate 17 increases the contact area between the control belt and the locking baffle 25, so that the pressing force of the control belt on the locking baffle 25 is more dispersed and even, and the situation that the locking baffle 25 bends the locking zone 21 relative to the smooth zone 20 is reduced. Furthermore, the press plate 17, which is located in the locking region 21 during the movement of the control band, can likewise evade the first press wheel 9 and the third press wheel 13 pressed against the smooth region 20.

The portion of the pressing plate 17 at the control gear 18 is located below the control gear 18, so that the pressing plate 17 avoids the control gear 18.

In the embodiment, the transmission teeth 16 are positioned on the front surface of the control area 19, and the height of the transmission teeth 16 is greater than that of the pressing plate 17, so that the transmission teeth 16 can be meshed with the control gear 18 when moving to the control gear 18.

The first pinch roller 9 is arranged above the first wheel body 6, the third pinch roller 13 is arranged above the second pinch roller 14, and the first pinch roller 9 and the third pinch roller 13 are both in contact extrusion with the front surface of the smooth area 20. Taking the first pressing wheel 9 as an example, when the driving teeth 16 move to the position of the first pressing wheel 9, the first pressing wheel 9 is located between the driving teeth 16 and the pressing plate 17, and if the part of the control band located between the first pressing wheel 9 and the third pressing wheel 13 has slight lateral deviation, the first pressing wheel 9 can correct the lateral position of the control band through the driving teeth 16 and the pressing plate 17. Likewise, the third press wheel 13 can also laterally correct the control band via the drive teeth 16 and the pressure plate 17.

In order to avoid damage to the first and third press wheels 9, 13 during lateral correction of the control band, the edges of the drive teeth 16 close to the smooth region 20 and the edges of the pressure plate 17 close to the smooth region 20 are rounded.

The edge intercommunication of locking hole has the mounting hole that supplies elasticity limiting plate 22 deformation to remove, and locking lever 23 installs to the locking hole in-process, and elasticity limiting plate 22 gets into in the outer tube 15 from the mounting hole through deformation. Those skilled in the art can design the specific number, shape and distribution of the mounting holes according to actual needs, so that the mounting holes do not affect the positioning effect of the locking holes on the locking rod 23.

In this embodiment, since the control belt, the first wheel 6, the first pressing wheel 9 and other components are all located on the side surface of the cross beam 1, the interference effect of the fixing rod 2 and the rotating rod 3 is avoided. In order to make the center of gravity more stable when the industrial curve drawing instrument moves on the paper surface, balance wheels are fixed on the first wheel shaft 4 and the second wheel shaft 5, so that the center of gravity of the whole industrial curve drawing instrument is balanced.

Example 2:

the difference of this embodiment 1 lies in that the front end of crossbeam is provided with the feed back bucket, and the rear end of crossbeam is provided with the blowing bucket, and the blowing bucket is located the rear of fifth wheel axle, fourth wheel axle and control gear in the crossbeam axial to avoid the blowing bucket to produce the interference to fifth wheel axle, fourth wheel axle and control gear. The control band is marked with a working starting point and a working end point which are positioned between the two ends of the control band. When the control band is just installed, the two ends of the control band are respectively located in the material returning barrel and the material placing barrel, the work starting point on the control band is located at the first pressure wheel, the work end point on the control band is located in the material placing barrel, the control band gradually moves to the material returning barrel from the material placing barrel along with the rotation of the first wheel body until the work end point on the control band moves to the fifth wheel shaft, and the curve drawing is completed at the moment.

The material returning barrel and the material placing barrel prevent the end part of the control belt from falling on a paper surface and generate unnecessary influence on the rotation of the first wheel body and the second wheel body on the paper surface. Meanwhile, the sizes of the openings of the feeding barrel and the discharging barrel need to be limited, the control belt in the discharging barrel is prevented from being pulled out from the discharging barrel too much in a short time, and the control belt in the feeding barrel is prevented from falling to a paper surface from the feeding barrel due to the fact that the control belt is increased.

The control belt is deformed through certain torsion, so that the opening edge of the discharging barrel and the opening edge of the material returning barrel simultaneously support the back of the control belt. The control belt is smooth on the back, so that the control belt is not excessively hindered when moving from the emptying barrel or entering the reclaiming barrel.

On the basis of ensuring the extrusion effect of the extrusion plate on the locking baffle plate and the transmission effect of the transmission teeth on the control gear, the transmission teeth and the extrusion plate have certain elasticity so as to be suitable for the torsional deformation of the control belt.

Example 3:

the present embodiment is different from embodiment 1 in that the control band is short in length, and both ends of the control band can be lifted by others during the travel of the push beam, preventing the ends of the control band from falling on the paper surface.

Example 4:

the difference between this embodiment and embodiment 1 is that the first wheel body, the first pressing wheel, the second pressing wheel, the third pressing wheel, the control belt, the locking piece, and the locking hole on the outer tube form a set of control unit. The number of the control units is two, and the two control units are respectively positioned on two sides of the cross beam. The notches on the two control belts simultaneously reach the corresponding locking pieces, so that the two locking pieces are unlocked simultaneously, and only the transmission gear on one control belt is meshed with the control gear at the moment. In other cases both locking members lock the swivelling levers simultaneously.

Under the unchangeable condition of first wheel body direction of travel, if the driving tooth on one of them control area and control gear meshing then can make the dwang rotate clockwise, if the driving tooth on another control area and control gear meshing then can make the dwang anticlockwise rotate. The two groups of control units are matched, so that the curvature radius of a drawn curve can be changed, and the deflection direction of the pen point in the advancing process can be changed.

While the invention has been described with reference to specific embodiments thereof, it will be understood by those skilled in the art that the invention is not limited thereto, and may be embodied in many different forms without departing from the spirit and scope of the invention as set forth in the following claims. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.