CN217415332U

CN217415332U - Compasses capable of sharpening lead core

Info

Publication number: CN217415332U
Application number: CN202220246069.2U
Authority: CN
Inventors: 施吉芬
Original assignee: Yuyao Sikumai Stationery Co ltd
Current assignee: Yuyao Sikumai Stationery Co ltd
Priority date: 2022-01-29
Filing date: 2022-01-29
Publication date: 2022-09-13
Anticipated expiration: 2032-01-29

Abstract

The utility model relates to a pair of compasses that can cut lead, including the compasses body, it has the cavity that supplies the lead to insert and arrange wherein to open on this compasses body, and the perisporium of this cavity has conical surface structure, its characterized in that: the compasses are characterized in that a mounting groove is formed in the cavity wall of the cavity, a detachable cutter is inserted in the mounting groove, the cutter is provided with a blade body which is in a sheet shape, a protruding V-shaped cutting edge of a conical surface structure is formed in the blade body, so that the cutter can be inserted into the V-shaped cutting edge of the cavity to grind a pencil lead in the cavity, the cutter is convenient to disassemble and assemble, the cutter can be replaced after the cutter is damaged, the processing of the compasses can be simplified, and the compasses capable of cutting the pencil lead and capable of cleaning powder and scraps for the cutter are convenient to clean.

Description

Compasses capable of sharpening lead core

Technical Field

The utility model relates to a drawing tool specifically is a compasses that can cut lead.

Background

Compasses (Compasses) are tools used to draw circles or arcs in mathematics and drawings, and are commonly used in ruler drawing. In general, compasses comprise two legs, wherein the end of one leg is provided with a compass tip for positioning the center of a circle, and the other leg is provided with a pencil lead for drawing a circle or an arc. For example, the compasses with pin protection structure disclosed in the Chinese patent application with patent number ZL201810624029.5 (with grant number CN 108790502A). However, the lead core is dull after being used for a period of time, and the lead core needs to be sharpened, so that the drawn arc line is thick, and has a difference with the actually required arc diameter, so that the drawn arc has low precision.

In order to solve the problems, the Chinese utility model patent with the patent number ZL201721797955.X (with the publication number CN208469408U) discloses a compasses handle and compasses, and a counter bore is opened on the compasses handle, be provided with the grinding section that is used for carrying out the grinding to the lead core in the counter bore, the grinding section is coniform, the inner wall of grinding section is equipped with a plurality of cutting edges. Still be provided with direction section, right section and long-pending bits section in the counter bore, the counter bore comprises direction section, right section, grinding section and the long-pending bits section that sets gradually from the extroversion inwards, the direction section is the horn mouth form, right the section and be cylindricly.

According to the compasses, the pencil core is ground by arranging the plurality of cutting edges in the compasses handle, so that the pencil core is sharpened conveniently. However, the compass still has the following disadvantages: firstly, because the cutting edge is directly integrated on the inner wall of the counter bore of the compass handle, once the compass accidentally drops from a table to cause the cutting edge to be broken or the cutting edge to be worn after being used for a long time, the compass cannot replace the cutting edge, and the pencil lead sharpening function of the compass is inconvenient to use; secondly, the compasses handle is small in size, and dust generated by grinding a lead core is easily adsorbed on the cutting edge due to the electrostatic action, so that the cutting edge is difficult to clean after use; the compasses have the advantages that the compasses handle is inverted after the pencil core is ground so as to pour away the powder, but the powder is easy to be absorbed on the blade or accumulated on the grinding section due to the blockage of a plurality of cutting edges, so that the inner part of the counter bore is more dirty, and the grinding effect of the cutting edges is influenced; fourthly, the compass needs to be provided with a plurality of blades in the counter bores with smaller size, so that the processing of the compass is more complicated.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the first technical problem that a compasses that can cut lead core is provided to foretell technical current situation, and cutter easy dismounting not only can change the cutter after the cutter damages, can also simplify the processing of compasses.

The utility model aims to solve the second technical problem that a compasses that can cut lead core convenient to clear up the cuttings to the cutter is provided to foretell technical situation.

The utility model aims to solve the third technical problem that a compasses that can cut lead core is provided to foretell technical situation, not only can make the cuttings pour cleaner, still makes the cuttings be difficult to long-pending stay around the cutter.

The utility model provides a technical scheme that above-mentioned first and second technical problem adopted is: the utility model provides a compasses that can cut lead core, includes the compasses body, and it has the cavity to open on this compasses body, and the perisporium of this cavity has conical surface structure, its characterized in that: the lead grinding tool is characterized in that a mounting groove is formed in the cavity wall of the cavity, a detachable tool is inserted into the mounting groove, the tool is provided with a sheet-shaped blade body, and a V-shaped cutting edge protruding into the conical surface structure is formed in the blade body, so that a lead inserted into the cavity can be ground. The pencil lead can be taken by the compasses, and can also be used in combination with the pencil lead on the market, namely, only a pencil lead mounting position is arranged on the compasses, and the pencil lead on the market is mounted on the pencil lead mounting position for use. The setting of conical surface structure can lead the inserting of lead, can also carry on spacingly to inserting the lead of arranging in the cavity.

In order to avoid the condition that the grooves are formed in the support legs of the compasses so that the mechanical performance of the support legs is influenced, the compasses body comprises a compasses handle, and the concave cavity is formed in the top of the compasses handle.

The utility model provides a technical scheme that above-mentioned third technical problem adopted does: the compasses body still include with the compasses head of connection can be dismantled to the compasses handle, the recess has been seted up at the top of this compasses head, open on the diapire of cavity have with the opening of recess intercommunication. When the cutter was to the lead core grinding, the cuttings that produce dropped to the recess through the opening in, when the cuttings were fallen to needs, earlier with the compasses handle from the round gauge overhead dismantlement, invert the compasses again, in order to pour out the cuttings in the recess unimpededly, make the cuttings clearance cleaner, the cuttings that can also avoid pouring out earlier through cutter and cavity and adsorb on the cutter or long-pending stay in the cavity, thereby the cavity that makes the compasses handle is cleaner, also can not influence the grinding effect of cutter.

In order to facilitate the storage of the replacement lead, the replacement lead can be placed in the groove.

In order to enable the compasses structure to be more compact and simultaneously facilitate detachable connection of the compass head and the compass handle, the upper portion of the compass head is provided with external threads, and the lower portion of the compass handle is provided with internal threads connected with the external threads in a matched mode. The design can make the upper portion holding of compasses head inside the compasses handle to make the compasses structure compacter, and threaded connection structure is fairly simple.

In order to facilitate the opening of the compasses handle, the mounting groove is deviated from the center of the concave cavity.

The conical surface structure comprises a first conical surface and a second conical surface, the first conical surface is located on one side of the installation groove, the second conical surface is located on the other side of the installation groove, the inner diameter of the first conical surface and the inner diameter of the second conical surface are gradually increased from bottom to top, and the lower edge of the second conical surface is lower than the lower edge of the first conical surface;

the mounting groove is provided with a plane, and the upper edge of the plane is connected with the first conical surface;

the peripheral wall of the concave cavity is also provided with an arc surface positioned on the other side of the mounting groove, and the arc surface is connected with the lower edge of the second conical surface. The height design of the first conical surface and the second conical surface can facilitate the mold opening of the compasses handle, and the matching of the plane and the first conical surface facilitates the insertion of a cutter into the mounting groove.

Compared with the prior art, the utility model has the advantages of: through inserting detachable cutter in the mounting groove, it is more convenient to make the cutter dismouting, not only make the cutter can change the cutter after damage or wearing and tearing, and compare in changing whole compasses handle, the replacement cost of cutter is lower, and, when mounting groove and cutter are dirty, available tweezers take out the cutter, in order to clear up the cuttings to mounting groove and cutter, thereby can make the compasses cleaner, and ensure the grinding effect of cutter, furthermore, this cutter has and is flaky blade body, and set up protruding V-arrangement blade of locating the conical surface structure on blade body, this kind of structure of cutter makes when processing the cutter, only through to the sheetmetal die cut V-arrangement blade can, make compasses manufacturing procedure simple, the processing cost is lower, and production efficiency is higher.

Drawings

FIG. 1 is a perspective view of an embodiment of the present invention;

fig. 2 is a partial perspective exploded view of an embodiment of the present invention;

fig. 3 is a longitudinal sectional view of an embodiment of the present invention;

fig. 4 is a longitudinal sectional view in the direction of a-a in fig. 3.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in FIGS. 1 to 4, the preferred embodiment of the present invention is shown.

The compasses capable of sharpening the pencil core in the embodiment comprise a compasses body 100, wherein the compasses body 100 comprises a compasses head 1, a first support leg 2 and a second support leg 3 (see fig. 3), and the first support leg 2 and the second support leg 3 are both hinged on the compasses head 1, so that the second support leg 3 can rotate relative to the first support leg 2, and the first support leg 2 and the second support leg 3 have a close state close to each other and an open state far away from each other (not shown in the figure). The structure of the first leg 2 and/or the second leg 3 hinged to the head 1 of the compass can refer to the prior art and will not be described herein. In other embodiments, one of the first leg 2 and the second leg 3 may be fixed to the head 1 and the other may be hinged to the head 1. The lower end of the first support leg 2 is provided with a compass tip 4 (see fig. 3), and in other embodiments, the compass tip 5 can also be a pressing block, a sucking disc and the like which have a surface contacting with a drawing base and can be positioned. The lower end of the second leg 3 is provided with a lead mounting location and a lead 5 can be detachably mounted on the lead mounting location (see fig. 3) so that a circle or arc can be drawn. In the embodiment, the pencil lead 5 is provided with the compasses, and in other embodiments, the pencil lead 5 can be a common pencil lead 5 on the market instead of the compasses, and is combined with the compasses for use. The detachable structure of the pencil core 5 can adopt the detachable structure of the pencil core 5 of any kind of compasses in the prior art, and in the embodiment, the bottom of the second leg 3 is provided with the slot 31, and the locking piece 9 capable of reciprocating sliding is arranged at the bottom of the second leg 3 in a penetrating way, the locking piece 9 moves inwards to press the pencil core 5 so as to lock the position of the pencil core 5, and the locking piece 9 moves outwards so as to release the locking of the pencil core 5, so that the pencil core 5 can be taken out of the slot 31.

As shown in fig. 3 and 4, the compass body 100 further includes a compass handle 6 detachably connected to the compass head 1, and specifically, the upper portion of the compass head 1 is provided with an external thread 12, and the lower portion of the compass handle 6 is provided with an internal thread 62 cooperatively connected with the external thread 12. The design can make the upper portion holding of compasses head 1 inside compasses handle 6 to make the compasses structure compacter, and threaded connection structure is fairly simple.

The upper part of the compass handle 6 is provided with a concave cavity 61 for inserting the lead 5 therein, the peripheral wall of the concave cavity 61 is provided with a conical surface structure, the conical surface structure can guide the lead 5 when the lead 5 is inserted into the concave cavity 61, and can limit the lead 5 when the lead 5 is inserted into the concave cavity 61. Be equipped with mounting groove 611 in the chamber wall of this cavity 61, having inserted detachable cutter in this mounting groove 611 (see fig. 1), it is more convenient to make the cutter dismouting, not only makes the cutter can change the cutter after damage or wearing and tearing, moreover, when mounting groove 611 and cutter are dirty, available tweezers take out the cutter to clear up the cuttings to mounting groove 611 and cutter, thereby can make the compasses cleaner, and ensure the grinding effect of cutter. The cutter is provided with a sheet-shaped blade body 7, and the blade body 7 is provided with a V-shaped cutting edge 71 (shown in figure 2) which is convexly arranged on a conical surface structure, so that a lead 5 inserted in the cavity 61 can be ground, and the structure of the cutter enables that the V-shaped cutting edge 71 can be punched out of a metal sheet when the cutter is machined, so that the compass machining process is simple, the machining cost is lower, and the production efficiency is higher.

The mounting groove 611 is arranged eccentrically from the center of the cavity 61 (see fig. 2), thereby facilitating the opening of the compass handle 6. Specifically, the tapered surface structure includes a first tapered surface 612 and a second tapered surface 613, and the inner diameters of the first tapered surface 612 and the second tapered surface 613 are gradually increased from bottom to top, so as to facilitate the lead 5 to be introduced into the cavity 61; the first tapered surface 612 is positioned at one side of the mounting groove 611, and the mounting groove 611 has a plane 611a, and the first tapered surface 612 is engaged with the upper edge of the plane 611a, so as to facilitate the insertion of the cutter into the mounting groove 611; the second tapered surface 613 is located at the other side of the mounting groove 611, and the lower edge of the second tapered surface 613 is lower than the lower edge of the first tapered surface 612 (see fig. 4), so that the opening of the compasses handle 6 is facilitated. The peripheral wall of the cavity 61 further has an arc surface 614 at the other side of the mounting groove 611, and the arc surface 614 is engaged with the lower edge of the second cone surface 613.

The head 1 is formed with a recess 11 (see fig. 2) at the top and an opening 615 (see fig. 3 and 4) in the bottom wall of the cavity 61 communicating with the recess 11. When the cutter is to the 5 grinding of pencil core, the cuttings that produce drop to recess 11 through opening 615 in, when the cuttings are poured to needs, dismantle the compasses handle 6 from the compasses head 1 earlier, invert compasses body 100 again, in order to pour out the cuttings in the recess 11 unimpeded, make the cuttings clearance cleaner, the cuttings that can also avoid pouring out earlier through cutter and cavity 61 adsorb on the cutter or long-pending stay in cavity 61, thereby make the cavity 61 of compasses handle 6 cleaner, also can not influence the grinding effect of cutter. The recess 11 is capable of receiving a replacement lead 8 (see fig. 3 and 4) to facilitate receipt of the replacement lead 8.

The working principle of the compasses capable of sharpening the lead core in the embodiment is as follows:

when the lead 5 at the lower end of the second leg 3 is ground to be blunt, the locking piece 9 is released to release the position locking of the lead 5, the lead 5 is taken out of the slot 31 and inserted into the cavity 61 from top to bottom, the compass body 100 is rotated relative to the lead 5, the V-shaped cutting edge 71 of the blade body 7 grinds the lead 5, the lead 5 is sharpened, and powder and dust generated by grinding enter the groove 11 through the opening 615. After the lead 5 is sharpened, the lead 5 is taken out of the concave cavity 61 and inserted into the slot 31 again, and the locking piece 9 is screwed to lock the position of the lead 5, so that the circular arc can be drawn.

When the pencil core 5 at the lower end of the third supporting leg 3 needs to be replaced or supplemented, the compasses handle 6 is loosened, the replacement pencil core 8 in the groove 11 is taken out, and the compasses handle 6 is screwed again. The replacement lead 8 is inserted into the cavity 61 from the top to the bottom, and the grinding and mounting operations are repeated.

When the cuttings are required to be poured out, the compasses handle 6 is loosened, whether the replaceable pencil core 8 in the groove 11 needs to be taken out or not is selected according to actual conditions, the compasses body 100 is inverted, and the cuttings are poured out. Then, the compass handle 6 is screwed again.

Claims

1. The utility model provides a compasses that can cut lead, includes compasses body (100), and it has cavity (61) that supplies lead (5) to insert to place wherein to open on this compasses body (100), and the perisporium of this cavity (61) has conical surface structure, its characterized in that: the cutting tool is characterized in that a mounting groove (611) is formed in the cavity wall of the cavity (61), a detachable cutting tool is inserted into the mounting groove (611), the cutting tool is provided with a sheet-shaped blade body (7), and a V-shaped cutting edge (71) protruding from the conical surface structure is formed on the blade body (7), so that a lead core (5) inserted into the cavity (61) can be ground.

2. The pencil core cutting compass according to claim 1, wherein: the compasses body (100) comprises a compasses handle (6), and the concave cavity (61) is arranged at the top of the compasses handle (6).

3. The pencil core cutting compass according to claim 2, wherein: the compasses body (100) also comprises a compasses head (1) detachably connected with the compasses handle (6), a groove (11) is formed in the top of the compasses head (1), and an opening (615) communicated with the groove (11) is formed in the bottom wall of the concave cavity (61).

4. The pencil core cutting compass of claim 3, wherein: a replacement lead (8) can be placed in the groove (11).

5. The pencil core cutting compass according to claim 3, wherein: the upper portion of the compass head (1) is provided with an external thread (12), and the lower portion of the compass handle (6) is provided with an internal thread (62) which is matched and connected with the external thread (12).

6. The pencil lead cutting compass according to any one of claims 2 to 5, wherein: the mounting groove (611) is disposed offset from the center of the cavity (61).

7. The pencil core cutting compass according to claim 6, wherein: the conical surface structure comprises a first conical surface (612) positioned on one side of the installation groove (611) and a second conical surface (613) positioned on the other side of the installation groove (611), the inner diameter of the first conical surface (612) and the inner diameter of the second conical surface (613) are gradually increased from bottom to top, and the lower edge of the second conical surface (613) is lower than the lower edge of the first conical surface (612);

the mounting groove (611) is provided with a plane (611a), and the upper edge of the plane (611a) is connected with the first conical surface (612);

the peripheral wall of the concave cavity (61) is also provided with an arc surface (614) positioned on the other side of the mounting groove (611), and the arc surface (614) is connected with the lower edge of the second conical surface (613).