CN210652450U - Telescopic compasses without damaging paper - Google Patents
Telescopic compasses without damaging paper Download PDFInfo
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- CN210652450U CN210652450U CN201921669173.7U CN201921669173U CN210652450U CN 210652450 U CN210652450 U CN 210652450U CN 201921669173 U CN201921669173 U CN 201921669173U CN 210652450 U CN210652450 U CN 210652450U
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Abstract
The utility model discloses a telescopic paper-damage-free compass, which comprises a compass head, a circle center landing leg rod body, a needle body component, a movable landing leg rod body and a clamping component, wherein the needle body component also comprises a shell and a circle center cover; the shell is fixed at the bottom end of the circle center supporting leg rod body; the needle body is vertically arranged and penetrates through the telescopic hole of the needle body, the upper part of the needle body is positioned in the shell, the lower part of the needle body extends out of the shell, and the needle body can move upwards until all the needle bodies are collected in the shell; the circle center cover is an arched hollow cover body, the top end of the circle center cover is arranged at the bottom end of the shell, and the circle center cover and the shell can rotate relatively; when the lower part of the needle body is in an extending state, the circle center cover covers the extending part of the needle body, the bottom edge of the circle center cover is flush with the bottom end of the needle body, the needle body moves upwards into the receiving shell, the compass head is rotated, the body of the circle center support leg rod rotates relative to the circle center cover, and the movable support leg is driven to move in a circular track around the circle center cover. The utility model has the advantages of reasonable structure, uneasy damage of drawing paper, safe use, convenient carrying, etc.
Description
Technical Field
The utility model belongs to the instrument field of drawing relates to a compasses, especially relates to a telescopic type does not hinder paper compasses.
Background
Compasses are often used to draw circles or arcs. The drawing compasses on the market at present comprise small compasses for daily drawing and large compasses for teaching. For the small compasses for daily drawing, the compass point is generally a steel needle, and paper draft is easily scratched and damaged in the integral rotation process of drawing the circumference, so that a user can be injured even when the compasses are carelessly used. In addition, the supporting leg size of the compasses is fixed, and for longer compasses, the inconvenient user puts into and accomodates the bag and carry.
SUMMERY OF THE UTILITY MODEL
The utility model provides a telescopic paper-damage-free compasses, which overcomes the defects of the prior art.
In order to achieve the purpose, the utility model provides a retractable paper-damage-free compass, including the compasses head, the centre of a circle landing leg body of rod, needle body assembly, the movable landing leg body of rod and centre gripping subassembly, needle body assembly sets up the bottom at the centre of a circle landing leg body of rod, needle body assembly includes the needle body, centre gripping subassembly sets up the bottom at the movable landing leg body of rod, centre gripping subassembly can centre gripping drawing instrument, the top of the centre of a circle landing leg body of rod and movable landing leg body of rod all rotates and connects in the compasses head, the centre of a circle landing leg body of rod and movable landing leg body of rod all can expand for the compasses head, needle body; the shell is fixed at the bottom end of the circle center supporting leg rod body; the bottom end of the shell is provided with a needle body telescopic hole; the needle body is vertically arranged and penetrates through the telescopic hole of the needle body, the upper part of the needle body is positioned in the shell, the lower part of the needle body extends out of the shell, and the needle body can move upwards until all the needle bodies are collected in the shell; the circle center cover is an arched hollow cover body, the top end of the circle center cover is arranged at the bottom end of the shell, and the circle center cover and the shell can rotate relatively; when the needle body lower part is in an extending state, the circle center cover covers outside the extending part of the needle body, the bottom edge of the circle center cover is flush with the bottom end of the needle body, the bottom end of the needle body is inserted in a preset circle center of the drawing paper, the bottom edge of the circle center cover is arranged on and supported on the drawing paper, the needle body is moved upwards into the collecting shell, the compasses head is rotated, the circle center supporting leg rod body rotates relative to the circle center cover, and the movable supporting leg is driven to move in a circular track mode around the circle.
Further, the utility model provides a telescopic type does not hinder paper compasses can also have such characteristic: wherein the circle center cover is transparent.
Further, the utility model provides a telescopic type does not hinder paper compasses can also have such characteristic: wherein, the needle body component also comprises a pressing head, a limiting disc, a connecting piece and a spring; the limiting disc is matched with the inner cross section of the shell, and the limiting disc is horizontally positioned in the shell; the top of the shell is provided with a pressing hole, the pressing head passes through the pressing hole, the lower end of the pressing head is fixed on the upper surface of the limiting disc, and the upper end of the pressing head extends out of the shell; the connecting piece is provided with a vertical section, a horizontal connecting section, an inclined section and a horizontal telescopic section which are sequentially and continuously connected, the vertical section is vertically arranged, the lower end of the inclined section is flush with the lower end of the vertical section, the upper end of the inclined end inclines along the direction far away from the vertical section, two ends of the horizontal connecting section are respectively connected with the lower end of the vertical section and the lower end of the inclined section, and the inner end of the horizontal telescopic section is connected with the upper end of the inclined section; the upper end of the vertical section is fixed on the lower surface of the limiting disc; the upper end of the needle body is fixed on the lower surface of the horizontal connecting section; the spring is sleeved on the needle body, the upper end of the spring is propped against the lower surface of the horizontal connecting section, and the lower end of the spring is propped against the bottom end in the shell and the periphery of the telescopic hole of the needle body; the side wall of the shell is provided with a connecting piece telescopic hole which is positioned on the same vertical line with the outer end of the horizontal telescopic section; the pressing head is pressed, the pressing head, the limiting disc, the connecting piece and the needle body move downwards, the lower portion of the needle body extends out of a needle body telescopic hole in the bottom end of the shell, the spring is compressed, the outer end of the horizontal telescopic section moves downwards to be inserted into the connecting piece telescopic hole, and the extending state of the lower portion of the needle body is fixed; the outer end of the horizontal telescopic section is pressed to the retraction shell, and the spring resets to drive the needle body, the pressing head, the limiting disc and the connecting piece to move upwards.
Further, the utility model provides a telescopic type does not hinder paper compasses can also have such characteristic: wherein, the shell is provided with a pressing rod; the upper end of the pressing rod is bent and fixed with the upper end of the shell; a gap is reserved between the non-end part of the pressing rod and the side wall of the shell; the lower extreme inboard of pressing the depression bar has presses the arch, and is corresponding with the position in the connecting piece telescopic hole of casing lateral wall, when the outer end of horizontal flexible section is inserted in the connecting piece telescopic hole, presses the lower extreme of pressing the depression bar along the direction towards the casing, presses the arch and pushes the outer end of horizontal flexible section into the casing.
Further, the utility model provides a telescopic type does not hinder paper compasses can also have such characteristic: wherein, the lower part of the shell is in an inverted cone shape, and the bottom end of the shell is provided with a shell edge which extends outwards and horizontally; the top end of the circle center cover is provided with a circle center rotating hole, the circle center rotating hole is sleeved at the bottom end of the shell and is positioned at the upper side of the edge of the shell, and the edge of the circle center rotating hole is arranged on the edge of the shell.
Further, the utility model provides a telescopic type does not hinder paper compasses can also have such characteristic: wherein, the bottom end of the circle center landing leg rod body is provided with a jack arranged in the vertical direction; the shell is provided with a fixed rod, the lower end of the fixed rod is fixed with the shell, and the upper end of the fixed rod is inserted into the jack; the pore wall of jack has the internal thread hole that runs through on the horizontal direction, and needle body subassembly still includes with internal thread hole assorted set screw, set screw in internal thread hole, supports the surface at the dead lever to set screw's the inner, and the bottom at the centre of a circle landing leg body of rod is fixed to the dead lever.
Further, the utility model provides a telescopic type does not hinder paper compasses can also have such characteristic: wherein, the centre of a circle landing leg body of rod and the removal landing leg body of rod are the telescopic body of rod.
Further, the utility model provides a telescopic type does not hinder paper compasses can also have such characteristic: wherein, the centre of a circle landing leg body of rod and the removal landing leg body of rod all include the degressive flexible section of a plurality of diameter, and a plurality of flexible section is nested in proper order according to its diameter, and the flexible section of minor diameter can be followed and pulled out in the flexible section of major diameter.
Further, the utility model provides a telescopic type does not hinder paper compasses can also have such characteristic: in two adjacent telescopic sections, a positioning hole is formed in the side wall of the bottom end of the telescopic section with the larger diameter, a positioning assembly is arranged at the top end of the telescopic section with the smaller diameter, and the positioning assembly comprises a positioning bulge which can extend out of and retract into the side wall; the positioning holes are matched with the positioning bulges and are positioned on the same axial straight line; the telescopic section with the smaller diameter is nested in the telescopic section with the larger diameter and is not completely pulled out, the positioning bulge of the telescopic section with the smaller diameter is contracted in the side wall of the telescopic section with the larger diameter, the telescopic section with the smaller diameter is pulled out, the positioning bulge moves to the positioning hole and extends out of the positioning hole, and the pulling-out state of the telescopic section with the smaller diameter is fixed.
Further, the utility model provides a telescopic type does not hinder paper compasses can also have such characteristic: wherein, in the two adjacent telescopic sections, the side wall of the top end of the telescopic section with the smaller diameter is provided with a convex hole; the telescopic positioning assembly also comprises a base and a positioning spring; the base is a basin body with an opening, the base is fixed in the side wall at the top end of the telescopic section with the smaller diameter, and the opening of the base faces the bulge hole; one end of the positioning spring is fixed in the base, and the other end of the positioning spring is fixed on the inner side of the positioning bulge; when the positioning bulge contracts, the positioning spring is compressed, when the positioning bulge moves to the positioning hole, the positioning spring resets, and the positioning bulge extends out of the positioning hole.
The beneficial effects of the utility model reside in that: the utility model provides a retractable does not hinder paper compasses, needle body subassembly includes centre of a circle cover and telescopic needle body, use the needle body to aim at and predetermine the centre of a circle after, can be through needle body subassembly with the needle body income casing in, remaining centre of a circle cover can continue to draw circularly as the centre of a circle, the centre of a circle cover can rotate relatively with the casing, accomplish the compasses and draw the circular shape demand, and simultaneously, the bottom plate of centre of a circle cover is circular, it is most advanced for the punctiform needle body, circular and the area of contact of drawing paper are greater than the area of contact of punctiform far away, thereby avoid damaging the drawing paper at the rotation in-process of drawing. The needle body is always retracted in the circle center cover or the shell, so that the injury to a user under any condition is avoided. In addition, the circle center landing leg rod body and the movable landing leg rod body can be contracted, and a user can conveniently store and carry the telescopic landing leg rod body. The utility model has the advantages of reasonable structure, uneasy damage of drawing paper, safe use, convenient carrying, etc.
Drawings
FIG. 1 is a schematic structural view of a telescopic paper-free compass;
FIG. 2 is a schematic view of a portion of the needle assembly with the lower portion of the needle extended;
FIG. 3 is a schematic view of the needle retraction of a portion of the needle assembly;
FIG. 4 is a half-sectional view of a portion of the housing and the circle center shield;
FIG. 5 is a schematic view showing the connection between the needle assembly and the center of a circle of the leg rod;
fig. 6 is a schematic structural diagram of two adjacent telescopic sections.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in figure 1, the utility model provides a telescopic type does not hinder paper compasses, including the compasses head 1, the centre of a circle landing leg body of rod 2, the needle body subassembly, remove the landing leg body of rod 4 and centre gripping subassembly 5.
The needle body subassembly sets up in the bottom of centre of a circle landing leg body of rod 2, and the needle body subassembly includes needle body 31. The setting of centre gripping subassembly 5 is in the bottom of removing the landing leg body of rod 4, but the drawing instrument of centre gripping subassembly 5 centre gripping, and the drawing instrument can be the instrument that can draw such as painting brush or refill. The top of the circle center landing leg rod body 2 and the top of the movable landing leg rod body 4 are both rotatably connected in the compass head 1, and the circle center landing leg rod body 2 and the movable landing leg rod body 4 can be unfolded relative to the compass head 1.
As shown in fig. 2 and 3, the needle assembly further comprises a housing 32 and a circle centre cover 33.
The shell 32 is fixed at the bottom end of the circle center supporting leg rod body 2. The bottom end of the shell 32 is provided with a needle body telescopic hole. The needle body 31 is vertically arranged and penetrates through the needle body telescopic hole, the upper part of the needle body 31 is positioned in the shell 32, the lower part of the needle body 31 extends out of the shell 32, and the needle body 31 can move upwards until all the needle body 31 is received in the shell 32. The circle center cover 33 is an arched hollow cover body, the top end of the circle center cover 33 is arranged at the bottom end of the shell 32, and the circle center cover 33 and the shell 32 can rotate relatively.
When the lower part of the needle body 31 is in an extending state, the circle center cover 33 covers the extending part of the needle body 31, and the bottom edge of the circle center cover 33 is flush with the bottom end of the needle body 31.
During drawing, the bottom end of the needle body 31 is inserted into a preset circle center of drawing paper, the bottom edge of the circle center cover 33 is arranged on and supported against the drawing paper, then the needle body 31 is moved upwards into the accommodating shell 32, the compasses head 1 is rotated, the circle center cover 33 does not move due to being supported against the drawing paper, the circle center supporting leg rod body 2 rotates relative to the circle center cover 33 and drives the movable supporting leg to move around the circle center cover 33 in a circular track, and the drawing tool clamped by the clamping assembly 5 draws a circle.
The circle center cover 33 is transparent, so that a user can see the inner needle body through the circle center cover, and the bottom end of the needle body is convenient to align to a preset circle center.
In particular, the needle body assembly further comprises a pressing head 34, a limiting disc 35, a connecting piece and a spring 37.
The limiting disc 35 is matched with the inner cross section of the shell 32, and the limiting disc 35 is horizontally positioned in the shell 32. The top of the housing 32 has a pressing hole, through which the pressing head 34 passes, and the lower end of the pressing head is fixed on the upper surface of the limiting plate 35, and the upper end of the pressing head extends out of the housing 32.
The connecting piece is provided with a vertical section 361, a horizontal connecting section 362, an inclined section 363 and a horizontal telescopic section 364 which are sequentially connected. The vertical section 361 is vertically arranged, the lower end of the inclined section 363 is flush with the lower end of the vertical section 361, the upper end of the inclined end inclines in the direction far away from the vertical section 361, the two ends of the horizontal connecting section 362 are respectively connected with the lower end of the vertical section 361 and the lower end of the inclined section 363, and the inner end of the horizontal telescopic section 364 is connected with the upper end of the inclined section 363.
The upper end of the vertical segment 361 is fixed to the lower surface of the limiting plate 35. The upper end of the needle body 31 is fixed to the lower surface of the horizontal connection section 362. The spring 37 is sleeved on the needle body 31, the upper end of the spring 37 abuts against the lower surface of the horizontal connecting section 362, and the lower end of the spring 37 abuts against the bottom end in the shell 32 and the periphery of the needle body telescopic hole.
The side wall of the housing 32 has a connector telescoping hole 321, which is located on the same vertical line as the outer end of the horizontal telescoping section 364.
The pressing head 34 is pressed, the pressing head 34, the limiting disc 35, the connecting piece and the needle body 31 move downwards, the lower portion of the needle body 31 extends out of a needle body telescopic hole in the bottom end of the shell 32, and the spring 37 is compressed. When the outer end of the horizontal telescopic section 364 is moved down and inserted into the connector telescopic hole 321, the extending state of the lower part of the needle body 31 is fixed, and the bottom of the needle body 31 is flush with the bottom edge of the end circle center cover 33, so that drawing preparation aiming at the preset circle center can be performed.
When the needle body 31 is aligned with the preset circle center and the needle body 31 needs to be retracted into the housing 32, the outer end of the horizontal telescopic section 364 is pressed to be retracted into the housing 32, the spring 37 is reset to drive the needle body 31, the pressing head 34, the limiting disc 35 and the connecting piece to move upwards, and the needle body 31 is retracted into the housing 32. The outer end of the horizontal telescoping section 364 now abuts against the inner wall of the housing 32.
Wherein, the limiting disc 35 is used for limiting the pressing head 34, the connecting piece and the needle body 31 to vertically move up and down.
The housing 32 has a pressing lever 322. The upper end of the pressing rod 322 is bent and fixed to the upper end of the housing 32. A gap is left between the non-end portion of the pressing rod 322 and the sidewall of the housing 32. The pressing rod 322 has a pressing protrusion 3221 at the inner side of the lower end thereof, corresponding to the position of the connector expansion hole 321 in the sidewall of the housing 32. When the outer end of the horizontal telescopic section 364 is inserted into the needle extension hole, the lower end of the pressing rod 322 is pressed in the direction toward the housing 32, and the pressing protrusion 3221 pushes the outer end of the horizontal telescopic section 364 into the housing 32, so as to press the outer end of the horizontal telescopic section 364 and retract the needle body 31.
As shown in fig. 4, the lower portion of the shell 32 is of an inverted cone shape, and the bottom end has a shell rim 323 extending horizontally outward. The top end of the circle center cover 33 is provided with a circle center rotating hole 331. The circle center rotating hole 331 is sleeved at the bottom end of the shell 32 and is positioned at the upper side of the shell edge 323. The edge of the circle center rotating hole 331 is disposed on the edge 323 of the casing, that is, the edge of the circle center rotating hole 331 is located between the edge 323 of the casing and the outer wall of the casing 32 with gradually enlarged diameter, so that the circle center cover 33 and the casing 32 can rotate relatively and can not move up and down relatively.
As shown in fig. 5, the bottom end of the circle center leg rod body 2 is provided with a vertically arranged insertion hole 21. The housing 32 has a fixing rod 324. The fixing rod 324 has a lower end fixed to the housing 32 and an upper end inserted into the insertion hole 21. The hole wall of the insertion hole 21 has an internal threaded hole penetrating in the horizontal direction, the needle body assembly further includes a fixing screw 38 matching with the internal threaded hole, the fixing screw 38 is screwed into the internal threaded hole, until the inner end of the fixing screw 38 abuts against the surface of the fixing rod 324, and the fixing rod 324 is fixed at the bottom end of the circle center leg support rod body 2.
Wherein, the circle center landing leg rod body 2 and the movable landing leg rod body 4 are telescopic rod bodies.
Specifically, the circle center supporting leg rod body 2 and the movable supporting leg rod body 4 both comprise a plurality of telescopic sections 22 with decreasing diameters. Several telescopic sections 22 are nested in turn according to their diameter, the telescopic section 22 of smaller diameter being able to be pulled out of the telescopic section 22 of larger diameter.
As shown in fig. 6, in two adjacent telescopic sections 22, the side wall of the bottom end of the telescopic section 22 with the larger diameter has a positioning hole 221, and the top end of the telescopic section 22 with the smaller diameter has a positioning assembly, which includes a positioning protrusion 222 that can extend out of and retract into the side wall. The positioning holes 221 are matched with the positioning protrusions 222 and are located on the same axial straight line.
The locating projection 222 of the smaller diameter telescoping section 22 collapses within the side wall of the larger diameter telescoping section 22 when the smaller diameter telescoping section 22 is nested within the larger diameter telescoping section 22 and not fully pulled out. The telescopic section 22 with the smaller diameter is pulled out, the positioning protrusion 222 moves to the positioning hole 221 and extends out of the positioning hole 221, and the pulling-out state of the telescopic section 22 with the smaller diameter is fixed.
Specifically, in two adjacent telescopic sections 22, a convex hole is formed on the side wall of the top end of the telescopic section 22 with the smaller diameter. The telescoping positioning assembly also includes a base 223 and a positioning spring 224. The base 223 is a basin body with an opening, the base 223 is fixed in the side wall at the top end of the smaller diameter telescopic section 22, and the opening of the base 223 faces the convex hole. One end of the positioning spring 224 is fixed in the base 223, and the other end is fixed inside the positioning protrusion 222. When the smaller diameter telescopic section is not completely pulled out and the positioning protrusion 222 is contracted, the positioning spring 224 is compressed; when the telescopic section with the smaller diameter is completely pulled out and the positioning protrusion 222 moves to the positioning hole 221, the positioning spring 224 is reset, and the positioning protrusion 222 extends out of the positioning hole 221.
After the circle center supporting leg rod body 2 and the movable supporting leg rod body 4 are contracted, a user can conveniently store and carry the supporting leg rod body.
Claims (10)
1. The utility model provides a retractable does not hinder paper compasses, including the compasses head, the centre of a circle landing leg body of rod, needle body assembly, remove the landing leg body of rod and centre gripping subassembly, needle body assembly sets up the bottom at the centre of a circle landing leg body of rod, needle body assembly includes the needle body, the centre gripping subassembly sets up the bottom at the removal landing leg body of rod, but centre gripping subassembly centre gripping drawing instrument, the centre of a circle landing leg body of rod all rotates with the top of removing the landing leg body of rod to be connected in the compasses head, the centre of a circle landing leg body of rod all can expand its characterized in that for:
the needle body assembly further comprises a shell and a circle center cover;
the shell is fixed at the bottom end of the circle center supporting leg rod body;
the bottom end of the shell is provided with a needle body telescopic hole;
the needle body is vertically arranged and penetrates through the needle body telescopic hole, the upper part of the needle body is positioned in the shell, the lower part of the needle body extends out of the shell, and the needle body can move upwards until all the needle bodies are collected in the shell;
the circle center cover is an arched hollow cover body, the top end of the circle center cover is arranged at the bottom end of the shell, and the circle center cover and the shell can rotate relatively;
when the lower part of the needle body is in an extending state, the circle center cover covers the extending part of the needle body, the bottom edge of the circle center cover is flush with the bottom end of the needle body, the bottom end of the needle body is inserted in a preset circle center of the drawing paper, the bottom edge of the circle center cover is arranged on and supported on the drawing paper, the needle body is moved upwards into the collecting shell, the compasses head is rotated, the body of the circle center support leg rotates relative to the circle center cover, and the movable support leg is driven to move in a circular track mode around the.
2. The telescopic paper-damage-free compass according to claim 1, wherein:
wherein, the circle center cover is transparent.
3. The telescopic paper-damage-free compass according to claim 1, wherein:
the needle body assembly further comprises a pressing head, a limiting disc, a connecting piece and a spring;
the limiting disc is matched with the inner cross section of the shell, and the limiting disc is horizontally positioned in the shell;
the top of the shell is provided with a pressing hole, the pressing head penetrates through the pressing hole, the lower end of the pressing head is fixed on the upper surface of the limiting disc, and the upper end of the pressing head extends out of the shell;
the connecting piece is provided with a vertical section, a horizontal connecting section, an inclined section and a horizontal telescopic section which are sequentially and continuously connected, the vertical section is vertically arranged, the lower end of the inclined section is flush with the lower end of the vertical section, the upper end of the inclined end inclines along the direction far away from the vertical section, two ends of the horizontal connecting section are respectively connected with the lower end of the vertical section and the lower end of the inclined section, and the inner end of the horizontal telescopic section is connected with the upper end of the inclined section;
the upper end of the vertical section is fixed on the lower surface of the limiting disc;
the upper end of the needle body is fixed on the lower surface of the horizontal connecting section;
the spring is sleeved on the needle body, the upper end of the spring is abutted against the lower surface of the horizontal connecting section, and the lower end of the spring is abutted against the bottom end in the shell and the periphery of the telescopic hole of the needle body;
the side wall of the shell is provided with a connecting piece telescopic hole which is positioned on the same vertical line with the outer end of the horizontal telescopic section;
the pressing head is pressed, the pressing head, the limiting disc, the connecting piece and the needle body move downwards, the lower portion of the needle body extends out of a needle body telescopic hole in the bottom end of the shell, the spring is compressed, the outer end of the horizontal telescopic section moves downwards to be inserted into the connecting piece telescopic hole, and the extending state of the lower portion of the needle body is fixed;
the outer end of the horizontal telescopic section is pressed to the retraction shell, and the spring resets to drive the needle body, the pressing head, the limiting disc and the connecting piece to move upwards.
4. The telescopic paper-damage-free compass according to claim 3, wherein:
wherein the shell is provided with a pressing rod;
the upper end of the pressing rod is bent and fixed with the upper end of the shell;
a gap is reserved between the non-end part of the pressing rod and the side wall of the shell;
the inner side of the lower end of the pressing rod is provided with a pressing bulge corresponding to the position of the connecting piece telescopic hole in the side wall of the shell, when the outer end of the horizontal telescopic section is inserted into the connecting piece telescopic hole, the lower end of the pressing rod is pressed along the direction towards the shell, and the outer end of the horizontal telescopic section is pushed into the shell by the pressing bulge.
5. The telescopic paper-damage-free compass according to claim 1, wherein:
the lower part of the shell is in an inverted cone shape, and the bottom end of the shell is provided with a shell edge which extends outwards and horizontally;
the top end of the circle center cover is provided with a circle center rotating hole, the circle center rotating hole is sleeved at the bottom end of the shell and is positioned at the upper side of the edge of the shell, and the edge of the circle center rotating hole is arranged on the edge of the shell.
6. The telescopic paper-damage-free compass according to claim 1, wherein:
the bottom end of the circle center supporting leg rod body is provided with a jack arranged in the vertical direction;
the shell is provided with a fixed rod, the lower end of the fixed rod is fixed with the shell, and the upper end of the fixed rod is inserted into the jack;
the pore wall of jack has the internal thread hole that runs through on the horizontal direction, and needle body subassembly still includes with internal thread hole assorted set screw, set screw in internal thread hole, supports the surface at the dead lever to set screw's the inner, and the bottom at the centre of a circle landing leg body of rod is fixed to the dead lever.
7. The telescopic paper-damage-free compass according to claim 1, wherein:
the circle center supporting leg rod body and the moving supporting leg rod body are telescopic rod bodies.
8. The telescopic paper-damage-free compass according to claim 7, wherein:
the circle center landing leg rod body and the movable landing leg rod body respectively comprise a plurality of telescopic sections with decreasing diameters, the plurality of telescopic sections are sequentially nested according to the diameters of the telescopic sections, and the telescopic sections with smaller diameters can be pulled out from the telescopic sections with larger diameters.
9. The telescopic paper-damage-free compass according to claim 8, wherein:
in two adjacent telescopic sections, a positioning hole is formed in the side wall of the bottom end of the telescopic section with the larger diameter, a positioning assembly is arranged at the top end of the telescopic section with the smaller diameter, and the positioning assembly comprises a positioning bulge which can extend out of and retract into the side wall;
the positioning holes are matched with the positioning bulges and are positioned on the same axial straight line;
the telescopic section with the smaller diameter is nested in the telescopic section with the larger diameter and is not completely pulled out, the positioning bulge of the telescopic section with the smaller diameter is contracted in the side wall of the telescopic section with the larger diameter, the telescopic section with the smaller diameter is pulled out, the positioning bulge moves to the positioning hole and extends out of the positioning hole, and the pulling-out state of the telescopic section with the smaller diameter is fixed.
10. The telescopic paper-damage-free compass according to claim 9, wherein:
in two adjacent telescopic sections, a convex hole is formed in the side wall of the top end of the telescopic section with the smaller diameter;
the telescopic positioning assembly also comprises a base and a positioning spring;
the base is a basin body with an opening, the base is fixed in the side wall at the top end of the telescopic section with the smaller diameter, and the opening of the base faces the bulge hole;
one end of the positioning spring is fixed in the base, and the other end of the positioning spring is fixed on the inner side of the positioning bulge;
when the positioning bulge contracts, the positioning spring is compressed, when the positioning bulge moves to the positioning hole, the positioning spring resets, and the positioning bulge extends out of the positioning hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921669173.7U CN210652450U (en) | 2019-10-08 | 2019-10-08 | Telescopic compasses without damaging paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921669173.7U CN210652450U (en) | 2019-10-08 | 2019-10-08 | Telescopic compasses without damaging paper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210652450U true CN210652450U (en) | 2020-06-02 |
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ID=70845638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921669173.7U Expired - Fee Related CN210652450U (en) | 2019-10-08 | 2019-10-08 | Telescopic compasses without damaging paper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210652450U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111959163A (en) * | 2020-08-10 | 2020-11-20 | 李彩琴 | Compasses equipment for student's mechanical drawing |
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2019
- 2019-10-08 CN CN201921669173.7U patent/CN210652450U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111959163A (en) * | 2020-08-10 | 2020-11-20 | 李彩琴 | Compasses equipment for student's mechanical drawing |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200602 |