Circular mapper capable of replacing circle cutting and circle drawing

Abstract

The invention provides a circle cutting and drawing replaceable circle mapper which comprises a body, a sliding groove is formed in the middle of the body, a circle center positioning assembly is arranged in the sliding groove, and the circle center positioning assembly can horizontally move along the track of the sliding groove or is connected with the sliding groove in a positioning mode. A paper cutting assembly is detachably mounted at one end of the body; or one end of the body is detachably provided with a drawing assembly; or one end of the body is detachably provided with the paper cutting assembly, and the other end of the body is detachably provided with the drawing assembly. The paper cutting assembly and / or the drawing assembly are / is installed on the plastic cover, the plastic cover is detachably connected with the body, switching between the circle cutting function and the circle drawing function is achieved, circle cutting and circle drawing are achieved on one product in cooperation with the circle center positioning assembly on the body, the applicability of the product can be improved, installation is convenient, and operation is easy.

Description

Technical Field

[0001] The invention relates to the technical field of drawing tools, and in particular to a circle drawing device capable of replacing cutting and drawing circles. Background Art

[0002] A circle draftsman is a drawing tool used to draw circles. Common circle draftsmen include a compass.

[0003] The existing Chinese patent application document with publication number CN2136748Y discloses a multifunctional draftsman belonging to the field of drawing instruments. It consists of a triangle ruler, a compass connected to the middle of the front of the triangle ruler, and a curved scale connected to the triangle ruler. The triangle ruler is provided with a protractor, a rounded corner hole and a curved plate. The two sides of the triangle ruler are provided with scale lines, and the middle part connected to the compass is provided with a reinforcement plate, and the bottom surface remains flat. The compass connected to the middle of the triangle ruler has only one rod, which is connected by bolts and can rotate on the plane of the triangle ruler. One corner end of the triangle ruler can be fixed with a needle, and a sizing ruler is also engraved on the triangle ruler.

[0004] Most of the prior art cartographers are circle drawing cartographers. Currently, there is an urgent need in the market for a cartographer that can draw a circle and cut a circle. Summary of the invention

[0005] In view of the defects in the prior art, the object of the present invention is to provide a circle drawing device which can replace the circle cutting and drawing.

[0006] According to the present invention, a circle cutting and drawing interchangeable circular cartographer comprises a body, a slide groove is provided in the middle of the body, a circle center positioning component is provided in the slide groove, and the circle center positioning component can move along the track of the slide groove or be connected with the slide groove in a positioning manner;

[0007] A paper cutting assembly is detachably mounted on one end of the body;

[0008] Or, a drawing component is detachably mounted on one end of the body;

[0009] Alternatively, a paper cutting assembly is detachably mounted on one end of the body, and a drawing assembly is detachably mounted on the other end of the body.

[0010] Preferably, the center positioning assembly comprises a positioning column with a base, a fixing seat, a positioning sheet and an adjusting cap;

[0011] The fixing seat comprises a base arranged below the slide slot and a hollow cylinder with an external thread, the fixing seat is rotatably sleeved on the positioning column, and the base of the fixing seat is arranged on the base of the positioning column; the positioning piece is arranged above the slide slot, and the adjusting cap is arranged on the upper surface of the positioning piece, and the positioning column and the hollow cylinder of the fixing seat pass through the slide slot and the positioning piece upward in sequence; the internal thread of the adjusting cap is threadedly connected with the external thread of the hollow cylinder of the fixing seat, so that the fixing seat, the base and the positioning piece are tightly or loosely fitted with the slide slot; the top of the positioning column extends upward to pass through the hollow cylinder and the adjusting cap of the fixing seat.

[0012] Preferably, the positioning column is a hollow cylinder penetrating from top to bottom, the top of the positioning column is fixedly connected with a push cap, the top surface of the push cap is made of a transparent material, and a center mark is provided on the top of the push cap.

[0013] Preferably, one end of the body is detachably connected to a plastic cover, and the plastic cover is provided with a paper cutting assembly for mounting a blade, and / or a drawing assembly for fixing a drawing pen.

[0014] Preferably, the body and the plastic cover are detachably fixedly connected via a locking assembly; the locking assembly comprises a locking block, a pressing portion, a protrusion, a spring, a middle baffle and a groove, the middle baffle being fixedly installed in the body, the locking block being slidably arranged in the body, the spring being arranged between the locking block and the middle baffle, and the expansion and contraction direction of the spring being the same as the sliding direction of the locking block; the pressing portion is fixedly connected to the locking block, one end of the pressing portion extends out from the body, the protrusion is arranged on the pressing portion and / or the locking block, and the groove is arranged on the plastic cover; under the outward elastic force of the spring, the protrusion and the groove of the locking block remain locked, and the plastic cover is fixedly connected to the body; the pressing portion moves into the body under the action of an external force, causing the protrusion to contact and lock with the groove, and the plastic cover is separable from the body.

[0015] Preferably, a long arm is provided at the end of the body, the long arm extends into the plastic cover, a slide bar extending along the length direction of the body is provided on the outer wall of the long arm, and a guide groove adapted to the slide bar is provided on the inner wall of the plastic cover.

[0016] Preferably, a limit stop bar is provided at one end of the guide groove close to the body, and a hook is provided at one end of the slide bar away from the body, and the hook and the limit stop bar limit each other in the length direction of the body.

[0017] Preferably, a long arm is provided at the end of the body, the long arm extends into the plastic cover, and a receiving area is provided in the inner area where the long arm extends into the plastic cover;

[0018] The paper cutting assembly includes a cutter head assembly and a hand push block, and the cutter head assembly is installed in the accommodation area of ​​the long arm;

[0019] The cutter head assembly comprises a cutter holder seat, a cutter holder cover and a blade holder, a central cavity for accommodating the cutter holder is formed between the cutter holder seat and the cutter holder cover, a compression spring is arranged between the cutter holder and the cutter holder seat, the expansion and contraction direction of the compression spring is the direction in which the cutter holder is away from or close to the bottom of the cutter holder seat, the cutter holder partially extends out of the central cavity, a cutter is fixed to the portion of the cutter holder located in the central cavity, a cutter outlet is arranged at the bottom of the cutter holder seat for allowing the cutter holder to extend or retract, and a driven slope is formed on the portion of the cutter holder extending out of the central cavity;

[0020] The hand-push block is movably arranged on the plastic cover, the bottom of the hand-push block extends into the interior of the plastic cover, and an active slope is formed on the bottom of the hand-push block;

[0021] The active slope is in contact with the driven slope, and the active slope cooperates with the driven slope to push the blade holder to move toward the bottom of the blade holder seat and compress the compression spring.

[0022] Preferably, a positioning portion is provided on the plastic cover, and the paper cutting assembly further comprises a rotating cover, and the rotating cover is fixed on the positioning portion.

[0023] Preferably, the drawing assembly comprises an upper positioning sleeve and a lower positioning sleeve, the plastic cover is provided with a mounting hole, both the upper positioning sleeve and the lower positioning sleeve are clamped with the side wall of the mounting hole, the upper positioning sleeve and / or the lower positioning sleeve are provided with an elastic clip for clamping a drawing pen, and the elastic clip allows the drawing pen to pass through the upper positioning sleeve and the lower positioning sleeve.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The present invention installs the paper cutting component and / or the drawing component on the plastic cover, and the plastic cover is detachably connected to the main body, thereby realizing the switching of the circle cutting function and the circle drawing function. In conjunction with the circle center positioning component on the main body, the circle cutting and circle drawing are realized on one product, which helps to improve the applicability of the product, and is easy to install and simple to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0027] Figure 1 It is a schematic diagram of the overall structure of the circular cartographer mainly embodying the present invention;

[0028] Figure 2 The exploded view of the overall structure of the circular cutting cartographer mainly embodies the present invention;

[0029] Figure 3This is a cross-sectional view mainly showing the overall structure of the cutter head assembly of the present invention;

[0030] Figure 4 This is an axial schematic diagram mainly showing the overall structure of the cutter head assembly of the present invention;

[0031] Figure 5 This is a schematic diagram of the bottom structure of the circular cartographer mainly embodied in the present invention;

[0032] Figure 6 It is a schematic diagram of the axial section of the overall structure of the circular cartographer which mainly embodies the present invention;

[0033] Figure 7 This is a schematic diagram of a circular cartographer cutting a circle, which is mainly embodied in the present invention;

[0034] Figure 8 It is a schematic diagram of the overall structure of the circle drawing device mainly embodied in the present invention;

[0035] Fig. 9 This is an exploded view of the overall structure of the drawing component mainly embodied in the present invention;

[0036] Fig.10 It is a schematic diagram of an axial section of the overall structure of the circular drawing device mainly embodied in the present invention;

[0037] Fig.11 The present invention mainly embodies the schematic diagram of a circular cartographer drawing a circle.

[0038] As shown in the figure:

[0039] Body 1 Press cap 26 Blade holder 53

[0040] Slide 11 Plastic cover 3 Spindle 531

[0041] Backrest 12 Slot 31 Spindle cover 532

[0042] Long arm 13 Guide groove 32 Screw 533

[0043] Accommodation area 131 Extension plate 33 Blade 534

[0044] Slide bar 132 Groove 331 Driven slope 535

[0045] Hook 1321 Limiting bar 34 Compression spring 54

[0046] Lock block 141 Rotating cover 35 Mounting hole 61

[0047] Pressing portion 142 Screw 36 Notch 611

[0048] Protrusion 143 Positioning portion 37 Upper positioning sleeve 62

[0049] Bottom cover 144 Hand push block 41 Positioning buckle 621

[0050] Screw 145 Active ramp 42 Funnel-shaped positioning clip 622 Spring 146 Pin hole 43 Lower positioning sleeve 63

[0051] Middle baffle 15 Split pin 44 Annular outer edge wall 631

[0052] Positioning column 21 Tool holder seat 51 Split clip 632

[0053] Anti-skid pad 22 knife edge 511 round 100

[0054] Fixed seat 23 Tool holder cover 52 Round 200

[0055] Positioning piece 24 Anti-slip protrusion 521 Drawing pen 201

[0056] Adjustment cap 25 DETAILED DESCRIPTION

[0057] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0058] like Figures 1 to 11 As shown, a circular cartographer with replaceable functions of cutting and drawing circles according to the present invention comprises a main body 1, a slide groove 11 is provided in the middle of the main body 1, a center positioning component is provided in the slide groove 11, and the center positioning component can move along the track of the slide groove 11 or be positioned and connected with the slide groove 11.

[0059] A paper cutting assembly is detachably mounted on one end of the body 1, and the paper cutting assembly includes a blade 534 that can be extended or retracted.

[0060] Alternatively, a drawing component is detachably mounted on one end of the body 1 , and the drawing component can detachably clamp the drawing pen 201 .

[0061] Alternatively, a paper cutting assembly is detachably mounted on one end of the body 1 , and a drawing assembly is detachably mounted on the other end of the body 1 .

[0062] It should be noted that the technical solution of the present application uses a circle center positioning assembly to determine the rotation center of the circular plotter, and realizes the paper cutting function or drawing function of the circular plotter by detachably installing a paper cutting assembly and / or a drawing assembly at the end of the body 1. When the circle center positioning assembly is positioned and connected to the slide slot 11, the body 1 can rotate around the central axis 531 of the circle center positioning assembly.

[0063] It needs to be further explained that

[0064] In a feasible implementation manner: the paper cutting assembly and the drawing assembly of the present application can be designed as separate replaceable parts modules. When the paper cutting function is needed, the paper cutting assembly parts module is fixedly connected to the end of the main body 1. When the drawing function is needed, the paper cutting assembly parts module is first removed, and then the drawing assembly parts module is fixedly connected to the end of the main body 1.

[0065] In another feasible implementation manner: the paper cutting assembly and the drawing assembly are detachably mounted at both ends of the body 1 .

[0066] In another feasible implementation manner: the paper cutting assembly and the drawing assembly are integrated into one component module, and the component module having the paper cutting assembly and the drawing assembly is detachably connected to the end of the body 1 as a whole.

[0067] It should be further explained that, in the above three embodiments, only the installation positions of the paper cutting assembly and the drawing assembly are different, and the combination of the paper cutting assembly and the drawing assembly at other positions all fall within the protection scope of the technical solution of this application.

[0068] like Figures 1 to 7 As shown, specifically, the circular plotter includes a body 1, a slide groove 11 is provided in the middle of the body 1, a circle center positioning component with a transparent bottom is provided in the slide groove 11, and a plastic cover 3 is detachably connected to one end of the body 1, and a paper cutting component for installing a blade 534 and / or a drawing component for fixing a drawing pen 201 is provided on the plastic cover 3. More specifically, the plastic cover 3 is arched and clamped at the end of the body 1, and a raised backrest 12 is formed at one end of the body 1 where the plastic cover 3 is installed, and the outer contour of the backrest 12 is adapted to the arched plastic cover 3.

[0069] Furthermore, the center positioning assembly includes a positioning column 21 with a base, a fixed seat 23, a positioning piece 24 and an adjusting cap 25. The fixed seat 23 includes a base arranged below the slide slot 11 and a hollow cylinder with an external thread. The fixed seat 23 is coaxially rotatably sleeved on the positioning column 21, and the base of the fixed seat 23 is arranged on the base of the positioning column 21. The positioning piece 24 is arranged above the slide slot 11, and the adjusting cap 25 is arranged on the upper surface of the positioning piece 24. The positioning column 21 and the hollow cylinder of the fixed seat 23 pass through the slide slot 11 and the positioning piece 24 upward in sequence. The internal thread of the adjusting cap 25 is threadedly connected with the external thread of the hollow cylinder of the fixed seat 23, so that the fixed seat 23, the base and the positioning piece 24 are tightly or loosely fitted with the slide slot 11; the top of the positioning column 21 extends upward to pass through the hollow cylinder of the fixed seat 23 and the adjusting cap 25.

[0070] In a preferred embodiment, the positioning column 21 is a hollow cylinder that passes through from top to bottom, and a cap 26 is fixedly connected to the top of the positioning column 21. The top surface of the cap 26 is made of a transparent material, and a center mark is provided on the top of the cap 26. It is convenient to visually check the position of the center of the circle during use. In addition, an anti-slip pad 22 is provided at the bottom of the positioning column 21.

[0071] Furthermore, the body 1 and the plastic cover 3 are detachably fixedly connected via a lock assembly. The lock assembly includes a lock block 141, a pressing portion 142, a protrusion 143, a spring 146, a middle baffle 15, and a groove 331. The middle baffle 15 is fixedly installed in the body 1, the lock block 141 is slidably arranged in the body 1, the spring 146 is arranged between the lock block 141 and the middle baffle 15, and the extension direction of the spring 146 is the same as the sliding direction of the lock block 141. The pressing portion 142 is fixedly connected to the lock block 141, one end of the pressing portion 142 extends from the body 1, the protrusion 143 is arranged on the pressing portion 142 and / or the lock block 141, and the groove 331 is arranged on the plastic cover 3. Under the outward elastic force of the spring 146, the protrusion 143 of the locking block 141 remains locked with the groove 331, and the plastic cover 3 is fixedly connected to the body 1; the pressing portion 142 moves into the body 1 under the action of external force, so that the protrusion 143 contacts and locks with the groove 331, and the plastic cover 3 and the body 1 can be separated. In order to improve the stability of the detachable structure, a group of locking components are respectively provided on both sides of the width of the body 1. Specifically, the outer ends of the locking blocks 141 are provided with pressing portions 142 that penetrate the side walls of the body 1. A middle baffle 15 is provided in the middle of the bottom of the body 1, and springs 146 are respectively sandwiched between the middle baffle 15 and the inner ends of the two locking blocks 141; the edges of the pressing portion 142 are provided with protrusions 143, and both sides of the arched plastic cover 3 are provided with extension plates 33, and the extension plates 33 are provided with grooves 331 matching the protrusions 143. In order to prevent the lock assembly from falling off during use, a bottom cover 144 is provided at the bottom of the body 1 and fixed to the body 1 by screws 36145. When the groove 331 is engaged with the protrusion 143, the plastic cover 3 is connected to the body 1, and when the pressing portion 142 is subjected to an inward external force, the lock block 141 moves horizontally toward the middle baffle 15, and the protrusion 143 moves out of the groove 331. When the groove 331 and the protrusion 143 are loosely matched, the plastic cover 3 is loosely matched with the body 1, and the arched plastic cover 3 can be separated from the body 1 by pulling it horizontally.

[0072] Furthermore, the end of the body 1 on which the plastic cover 3 is installed is provided with a long arm 13, and the long arm 13 extends into the plastic cover 3. The outer wall of the long arm 13 is provided with a slide bar 132 extending along the length direction of the body 1, and the inner wall of the plastic cover 3 is provided with a guide groove 32 adapted to the slide bar 132. A limit stop bar 34 is provided at one end of the guide groove 32 close to the body 1, and a hook portion 1321 is provided at one end of the slide bar 132 away from the body 1, and the hook portion 1321 and the limit stop bar 34 are mutually limited in the length direction of the body 1. In order to prevent the arched plastic cover 3 from falling off when loosely fitting with the body 1 during incomplete disassembly (when replacing the blade assembly), a limit stop bar 34 is provided at the outer end of the guide groove 32, and a hook portion 1321 adapted to the limit stop bar 34 is provided at the free end of the slide bar 132. Since the arched plastic cover 3 has a certain flexibility, when it is necessary to completely disassemble it (when replacing the functional group), the side wall of the arched plastic cover 3 is appropriately opened outwards to completely separate the limiting stop bar 34 from the hook portion 1321 .

[0073] Further, the end of the body 1 is provided with a long arm 13, and the long arm 13 extends into the plastic cover 3. The inner area of ​​the long arm 13 extending into the plastic cover 3 is provided with a receiving area 131. The paper cutting assembly includes a cutter head assembly and a hand push block 41, and the cutter head assembly is installed in the receiving area 131 of the long arm 13. The cutter head assembly includes a cutter holder seat 51, a cutter holder cover 52, and a blade holder 53. A central cavity for accommodating the blade holder 53 is formed between the cutter holder seat 51 and the cutter holder cover 52. A compression spring 54 is provided between the blade holder 53 and the cutter holder seat 51. The expansion and contraction direction of the compression spring 54 is the direction in which the blade holder 53 moves away from or approaches the bottom of the cutter holder seat 51. The blade holder 53 partially extends out of the central cavity. A blade 534 is fixed to the portion of the blade holder 53 located in the central cavity. A knife outlet 511 for allowing the blade 534 to extend or retract is provided at the bottom of the cutter holder seat 51. A driven slope 535 is formed on the portion of the blade holder 53 extending out of the central cavity. The hand push block 41 is movably arranged on the plastic cover 3, and the bottom of the hand push block 41 extends into the interior of the plastic cover 3. The bottom of the hand push block 41 is formed with an active slope 42, and the active slope 42 contacts the driven slope 535, and the active slope 42 and the driven slope 535 cooperate to push the blade holder 53 to move in a direction close to the bottom of the blade holder seat 51 and compress the compression spring 54. The hand push block 41 moves on the plastic cover 3, and the active slope 42 and the driven slope 535 move relative to each other, pushing the blade holder 53 to move in a direction close to the bottom of the blade holder seat 51 to extend the blade 534 from the knife outlet 511, and the compression spring 54 is compressed; the hand push block 41 is reset, the compression spring 54 is reset, and the blade holder 53 moves upward under the action of the compression spring 54 to retract the blade 534 from the knife outlet 511. A positioning portion 37 is provided on the plastic cover 3, and the paper cutting assembly also includes a rotating cover 35, and the rotating cover 35 is fixed on the positioning portion 37.

[0074] In a feasible embodiment: the paper cutting assembly includes a cutter head assembly, a hand push block 41 and a rotating cover 35. The top of the plastic cover 3 includes a slot 31 for inserting the hand push block 41, and a positioning portion 37 for fixing the rotating cover 35, and the rotating cover 35 is fixed on the positioning portion 37 by a screw 36. The bottom of the hand push block 41 extends through the slot 31 to the inside of the rotating cover 35 and is opposite to the cutter head assembly. A pin hole 43 is provided on the hand push block 41 located inside the plastic cover 3, and a cotter pin 44 is inserted into the pin hole 43 of the hand push block 41 to prevent the hand push block 41 from falling off. After the hand push block 41 is inserted into the arched plastic cover 3, a cotter pin 44 is inserted into the pin hole 43 of the hand push block 41 to prevent the hand push block 41 from falling off. An active slope 42 is formed at the bottom of the hand push block 41, and a driven slope 535 is provided on the surface of the cutter head assembly opposite to the active slope 42. When the push block 41 moves in the horizontal direction, the active slope 42 pushes the driven slope 535, so that the blade 534 on the cutter head assembly extends out of the bottom of the body 1, so that the cutting operation can be performed. Specifically, the cutter head assembly includes a cutter holder seat 51 and a cutter holder cover 52, and a middle cavity is formed between the cutter holder seat 51 and the cutter holder cover 52. The cutter holder 53 is placed in the middle cavity. A spindle 531 is provided at one end of the cutter holder 53, and a blade 534 is clamped by the spindle 531 and the spindle cover 532. The spindle 531 and the spindle cover 532 are connected by screws 533. In addition, a driven slope 535 is formed at the other end of the cutter holder 53 located outside the middle cavity, and a compression spring 54 is provided between the inner wall of the cutter holder 53 below the driven slope 535 and the bottom wall of the cutter holder seat 51. A cutter outlet 511 is provided at the bottom of the cutter holder seat 51. The active slope 42 pushes the driven slope 535 downward, driving the blade holder 53 to move downward relative to the blade holder seat 51, thereby exposing the lower edge of the blade 534 at the blade outlet 511. The blade 534 in this embodiment can be replaced with different styles as needed. In order to facilitate replacement, anti-slip protrusions 521 are provided at both ends of the blade holder cover 52. In addition, a scale ruler with the position of the blade 534 as the starting point is provided on the body 1, which is convenient for radius positioning according to the size of the circle to be cut. When in use, push the hand push block 41 to make the blade 534 extend downward, loosen the adjustment cap 25, slide the center positioning assembly to the desired radius position, tighten the adjustment cap 25 again to lock the center positioning assembly, and anchor the radius size. Press the pressing cap 26 downward with one hand to locate the center of the circle, and at the same time hold the rotating cover 35 with the other hand to drive the body 1 to rotate around the center positioning assembly to cut the circle 100.

[0075] like Figures 8 to 11As shown, further, the drawing component includes an upper positioning sleeve 62 and a lower positioning sleeve 63, and a mounting hole 61 is provided on the plastic cover 3. Both the upper positioning sleeve 62 and the lower positioning sleeve 63 are clamped with the side wall of the mounting hole 61, and the upper positioning sleeve 62 and / or the lower positioning sleeve 63 are provided with elastic clips for clamping the drawing pen 201, and the elastic clips allow the drawing pen 201 to pass through the upper positioning sleeve 62 and the lower positioning sleeve 63.

[0076] In a feasible embodiment: Regarding the drawing component, the top of the plastic cover 3 is provided with a mounting hole 61 for clamping the upper positioning sleeve 62 and the lower positioning sleeve 63. A notch 611 is provided at the edge of the mounting hole 61. The upper positioning sleeve 62 includes an annular outer ring and a funnel-shaped positioning clip 622 provided inside the annular outer ring; an outward-turned positioning buckle 621 is provided on the annular outer ring, and the positioning buckle 621 is adapted to the notch 611, so as to realize the clamping of the upper positioning sleeve 62 and the arched plastic cover 3. The lower positioning sleeve 63 includes an annular outer edge wall 631 clamped with the mounting hole 61, and the other end of the annular outer edge wall 631 extends toward the inner side of the mounting hole 61 and folds upward to form a split-type clip 632, and the split-type clip 632 forms a columnar structure surrounding the outer peripheral surface of the drawing pen 201. The multiple U-shaped structures formed by the entire lower positioning sleeve 63 can achieve circumferential clamping of the drawing pen 201, adapt to pens of various sizes and structures, and can ensure the clamping force, ensuring that the drawing pen 201 does not move up and down when in use. Preferably, the central axes 531 of the upper positioning sleeve 62 and the lower positioning sleeve 63 are collinear, which improves the stability of clamping the drawing pen 201. In addition, another scale ruler with the position of the drawing pen as the starting point is provided on the main body 1, which is convenient for radius positioning according to the size of the circle to be drawn. When in use, loosen the adjustment cap 25, slide the center positioning assembly to the desired radius position, and tighten the adjustment cap 25 again. Press the pressing cap 26 downward with one hand to achieve center positioning, and at the same time hold the drawing pen 201 with the other hand, drive the main body 1 to rotate around the center positioning assembly, and complete the drawing of the circle 200.

[0077] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0078] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A circle drawing device capable of replacing a circle cutter and a circle drawer, characterized in that: It comprises a body, a slide groove is provided in the middle of the body, a center positioning component is provided in the slide groove, and the center positioning component can move along the track of the slide groove or be connected with the slide groove; A paper cutting assembly is detachably mounted on one end of the body; Or, a drawing component is detachably mounted on one end of the body; Alternatively, a paper cutting assembly is detachably mounted on one end of the body, and a drawing assembly is detachably mounted on the other end of the body.

2. The circle drawing device capable of replacing a circle cutter and a circle drawer as claimed in claim 1, characterized in that: The center positioning assembly includes a positioning column with a base, a fixing seat, a positioning sheet and an adjusting cap; The fixing seat comprises a base arranged below the slide slot and a hollow cylinder with external threads, the fixing seat is rotatably sleeved on the positioning column, and the base of the fixing seat is arranged on the base of the positioning column; The positioning piece is arranged above the slide slot, the adjusting cap is arranged on the upper surface of the positioning piece, and the positioning column and the hollow cylinder of the fixing seat pass through the slide slot and the positioning piece in sequence upward; The internal thread of the adjusting cap is threadedly connected with the external thread of the hollow cylinder of the fixing seat, so that the fixing seat, the base and the positioning piece are tightly or loosely fitted with the slide groove; The top of the positioning column extends upward and passes through the hollow column and the adjustment cap of the fixing seat.

3. The circle drawing device capable of replacing a circle cut or a circle drawing as claimed in claim 2, characterized in that: The positioning column is a hollow column that passes through from top to bottom. A push cap is fixedly connected to the top of the positioning column. The top surface of the push cap is made of a transparent material, and a center mark is arranged on the top of the push cap.

4. The circle drawing device capable of replacing a circle cutter and a circle drawer as claimed in claim 1, characterized in that: One end of the body is detachably connected to a plastic cover, and the plastic cover is provided with a paper cutting component for mounting a blade and / or a drawing component for fixing a drawing pen.

5. The circle drawing device capable of replacing a circle cut or a circle drawing as claimed in claim 4, characterized in that: The body and the plastic cover are detachably fixedly connected via a locking assembly; The lock assembly includes a lock block, a pressing portion, a protrusion, a spring, a middle baffle and a groove, wherein the middle baffle is fixedly installed in the body, the lock block is slidably arranged in the body, the spring is arranged between the lock block and the middle baffle, and the expansion and contraction direction of the spring is the same as the sliding direction of the lock block; The pressing portion is fixedly connected to the locking block, one end of the pressing portion extends out from the body, the protrusion is arranged on the pressing portion and / or the locking block, and the groove is arranged on the plastic cover; Under the outward elastic force of the spring, the protrusion and the groove are locked, and the plastic cover is fixedly connected to the body; The pressing portion moves into the main body under the action of external force, so that the protrusion contacts and locks with the groove, and the plastic cover can be separated from the main body.

6. The circle drawing device capable of replacing a circle cut or a circle drawing as claimed in claim 5, characterized in that: A long arm is arranged at the end of the body and extends into the plastic cover. A slide bar extending along the length direction of the body is arranged on the outer wall of the long arm, and a guide groove adapted to the slide bar is arranged on the inner wall of the plastic cover.

7. The circle drawing device capable of replacing a circle cut or a circle drawing as claimed in claim 6, characterized in that: A limit stop bar is arranged at one end of the guide groove close to the body, and a hook is arranged at one end of the slide bar away from the body, and the hook and the limit stop bar limit each other in the length direction of the body.

8. The circle drawing device capable of replacing a circle cut or a circle drawing as claimed in claim 4, characterized in that: The end of the body is provided with a long arm, the long arm extends into the plastic cover, and the inner area where the long arm extends into the plastic cover is provided with a receiving area; The paper cutting assembly includes a cutter head assembly and a hand push block, and the cutter head assembly is installed in the accommodation area of ​​the long arm; The cutter head assembly comprises a cutter holder seat, a cutter holder cover and a blade holder, a central cavity for accommodating the cutter holder is formed between the cutter holder seat and the cutter holder cover, a compression spring is arranged between the cutter holder and the cutter holder seat, the expansion and contraction direction of the compression spring is the direction in which the cutter holder is away from or close to the bottom of the cutter holder seat, the cutter holder partially extends out of the central cavity, a cutter is fixed to the portion of the cutter holder located in the central cavity, a cutter outlet is arranged at the bottom of the cutter holder seat for allowing the cutter holder to extend or retract, and a driven slope is formed on the portion of the cutter holder extending out of the central cavity; The hand-push block is movably arranged on the plastic cover, the bottom of the hand-push block extends into the interior of the plastic cover, and an active slope is formed on the bottom of the hand-push block; The active slope is in contact with the driven slope, and the active slope cooperates with the driven slope to push the blade holder to move toward the bottom of the blade holder seat and compress the compression spring.

9. The circle drawing device capable of replacing a circle cut or a circle drawing as claimed in claim 8, characterized in that: The plastic cover is provided with a positioning portion, and the paper cutting assembly further comprises a rotating cover, and the rotating cover is fixed on the positioning portion.

10. The circle drawing device capable of replacing a circle cut or a circle drawing as claimed in claim 4, characterized in that: The drawing component includes an upper positioning sleeve and a lower positioning sleeve, the plastic cover is provided with a mounting hole, both the upper positioning sleeve and the lower positioning sleeve are clamped with the side wall of the mounting hole, the upper positioning sleeve and / or the lower positioning sleeve are provided with an elastic clip for clamping a drawing pen, and the elastic clip allows the drawing pen to pass through the upper positioning sleeve and the lower positioning sleeve.

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