CN109899348B

CN109899348B - Detachable eraser connector suitable for ends of pencils of various specifications

Info

Publication number: CN109899348B
Application number: CN201910179305.6A
Authority: CN
Inventors: 张琳函
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-03-11
Filing date: 2019-03-11
Publication date: 2020-07-24
Anticipated expiration: 2039-03-11
Also published as: CN109899348A

Abstract

The invention relates to the field of daily necessities, in particular to a detachable eraser connector suitable for ends of multiple-specification pencils, which comprises a pencil body and an eraser, wherein a connecting device used for connecting the pencil body and the eraser is arranged between the pencil body and the eraser, the connecting device comprises a sleeve, an eraser pushing mechanism and a penholder locking mechanism, the eraser pushing mechanism comprises an upper screw cap and an upper push disc, the inner wall of the upper screw cap is in threaded connection with the outer edge of the upper push disc, the penholder locking mechanism comprises a lower screw cap, a lower push disc and a locking ring, the lower screw cap can be rotatably arranged at the outer side of the other end of the sleeve, the lower push disc can be movably arranged at the inner side of the sleeve, the inner wall of the lower screw cap is in threaded connection with the outer edge of the lower push disc, and the invention discloses the detachable eraser connector suitable for ends of multiple, the mode of extruding through the screw thread has effectually avoided the waste of eraser, has solved the quick assembly disassembly problem with the body of the pen through the tightening up effect of catch simultaneously.

Description

Detachable eraser connector suitable for ends of pencils of various specifications

Technical Field

The invention relates to the field of daily necessities, in particular to a detachable eraser connector suitable for ends of pencils of various specifications.

Background

The pencil is a special pen for writing and drawing sketch, has a history of more than four hundred years to date, wherein the drawing sketch pencil is divided into a plurality of types, and is divided into three development stages, namely graphite, a wooden pen holder and a pencil with a cap, and the pencil is manufactured into a pencil cap and a pencil rod: the appearance decorative material of the pencil cap is mainly a polyester material, and the manufacturing process can be divided into the working procedures of molding, offset printing, assembling and the like. The appearance decorative materials of the pencil holder mainly comprise nitrocellulose pencil paint, printing ink, electrochemical aluminum foil, rubber heads, aluminum hoops and the like. The manufacturing process can be divided into the processes of pencil boards, pencil leads, pencil rods, finished product decoration and the like.

The existing pencil and the eraser at the tail part of the pencil are fixedly connected by adopting an aluminum foil, the assembly and disassembly process is almost irreversible, moreover, half part of the aluminum foil can be remained and can not be used along with the use of the pencil, so that waste is caused, meanwhile, the aluminum foil and the eraser are confined at the tail part of the pencil, and the assembly and disassembly are inconvenient, so that an eraser quick assembly device is needed to be designed to solve the technical problem.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a detachable eraser connector suitable for pencil ends of various specifications.

The invention discloses a detachable eraser connector suitable for ends of pencils with various specifications, which comprises a pencil body and an eraser, wherein a connecting device used for connecting the pencil body and the eraser is arranged between the pencil body and the eraser, the connecting device comprises a sleeve, an eraser pushing mechanism and a penholder locking mechanism, the axes of the sleeve, the eraser pushing mechanism, the penholder locking mechanism, the pencil body and the eraser are superposed, the eraser pushing mechanism and the penholder locking mechanism are respectively arranged at two ends of the sleeve, the eraser pushing mechanism comprises an upper rotating cap and an upper pushing disc, the upper rotating cap can be rotatably sleeved at one end of the sleeve, the upper pushing disc can be movably arranged at the inner side of the sleeve, the inner wall of the upper rotating cap is in threaded connection with the outer edge of the upper pushing disc, the penholder locking mechanism comprises a lower rotating cap, a lower pushing disc and a locking ring, the lower rotating cap can be rotatably arranged at the outer side of the other end of the sleeve, the lower pushing disc, the locking ring can be movably arranged on the inner side of the sleeve, the locking ring is positioned on one side, far away from the upper push disc, of the lower push disc, and the inner wall of the lower screw cap is in threaded connection with the outer edge of the lower push disc.

Preferably, the upward pushing disc and the sleeve are coaxially arranged, three first convex blocks are uniformly arranged on the outer edge of the upward pushing disc in the circumferential direction, three first bars corresponding to the first convex blocks one to one are arranged on the cylindrical wall of the sleeve, the length direction of each first bar is parallel to the axis of the sleeve, the outer end of each first convex block extends out of the bar to form an avoiding through hole and is in threaded connection with the outer wall of the upper rotating cap, and the outer edge of the upward pushing disc is attached to the inner wall of the sleeve.

Preferably, the fixed spacing ring that is provided with on the telescopic outer cylinder wall, the one end that the cap was screwed on in keeping away from to last spacing ring is provided with an go up the go-between, goes up the go-between cover and locates the sleeve outside, goes up the cap of screwing on and the one end inner wall that the go-between is close to last spacing ring all is provided with first draw-in groove, and the thickness of every first draw-in groove is equalling in the thickness of last spacing ring, and the width of every first draw-in groove is the half of last spacing ring width, goes up fixed connection between go-between and the last.

Preferably, telescopic tip is provided with an annular cover plate rather than the coaxial line, annular cover plate is close to telescopic one side and evenly is provided with three fixture block along the circumferencial direction, the opening part joint of breach is dodged with three first strip to three fixture block one-to-one, annular cover plate is close to telescopic one side still is provided with an annular flange, upward the spin cap is close to and is provided with the annular groove that is used for dodging annular flange on the one end inner wall of annular cover plate, the inner wall and the telescopic outer wall joint cooperation of annular flange, three fixture block is located the inboard of annular flange.

Preferably, the lower pushing plate and the sleeve are coaxially arranged, three second convex blocks are uniformly arranged at the outer edge of the lower pushing plate along the circumferential direction, a second strip-shaped avoiding notch corresponding to the three second convex blocks one to one is formed in the cylindrical wall of the sleeve, the length direction of the second strip-shaped avoiding notch is parallel to the axis of the sleeve, the outer end of the second convex block stretches out of the strip-shaped avoiding through hole and is in threaded connection with the outer wall of the lower screwing cap, a gap is reserved between the outer edge of the lower pushing plate and the inner wall of the sleeve, and a through hole for avoiding the pen body is formed in the center of the lower pushing plate.

Preferably, the fixed spacing ring down that is provided with on the telescopic outer cylinder wall, the one end that cap was screwed down to the spacing ring was kept away from down is provided with a lower go-between, the sleeve outside is located to the go-between cover down, cap and the one end inner wall that lower go-between was close to spacing ring down all are provided with the second draw-in groove down, the thickness of every second draw-in groove equalls in the thickness of spacing ring down, the width of every second draw-in groove is the half of spacing ring width down, go-between and the cap down fixed connection of screwing.

Preferably, the catch and the lower pushing disc are coaxially arranged, the catch is made of elastic materials, a plurality of contraction gaps are formed in one side, close to the lower pushing disc, of the catch, all the contraction gaps are evenly distributed in the circumferential direction of the catch, the length of each contraction gap is smaller than the thickness of the catch, the outer edge of one end, far away from the lower pushing disc, of the catch is of a round angle structure, and one side, provided with the contraction gaps, of the catch is abutted to the lower pushing disc.

Preferably, the sleeve decreases from the lower retainer ring toward the inner diameter of the pen body, and the minimum inner diameter of the sleeve is larger than the inner diameter of the locking ring and smaller than the outer diameter of the locking ring.

Preferably, the inner wall of one end of the sleeve, which is close to the eraser, is uniformly provided with three clamping strips along the circumferential direction, the length direction of the clamping strips is parallel to the axis of the sleeve, and the center of one side of the upward pushing disc, which is close to the eraser, is provided with a contact pin.

Has the advantages that: when the connecting device is used, one end of each of two ends of the connecting device is used for connecting a pen body, the other end of the connecting device is used for installing an eraser, a through hole for avoiding the pen body is formed in the center of the lower push disc, the lower push disc is driven to move along the axial direction of the sleeve by the rotation of the lower screw cap, the second strip-shaped avoiding gap is used for enabling the second lug to slide along the axial direction of the sleeve, the lower push disc can further push the locking ring outwards, when the outer edge of the locking ring is pressed, all contraction gaps are stressed to be close to each other, and the pen body penetrating through the center of the lower push disc is clamped; when the eraser is installed, the clamping strip is used for preventing the eraser from falling off due to insufficient friction force after being inserted, the upward pushing disc is driven to move axially along the sleeve by the rotation of the upper screw cap, the first strip-shaped avoiding gap is used for enabling the first bump to slide axially along the sleeve, and further the upward pushing disc can push the eraser clamped at the end part of the sleeve outwards a little bit.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

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

FIG. 2 is an exploded perspective view of the present invention;

FIG. 3 is a perspective view of the connecting device;

FIG. 4 is an exploded perspective view of the connector;

FIG. 5 is a plan sectional view of the sleeve;

FIG. 6 is a perspective view of the locking ring;

FIG. 7 is a schematic perspective view of the push-up plate;

FIG. 8 is a schematic view of the connection in use according to the present invention;

description of reference numerals: the pen body 1, the eraser 2, the connecting device 3, the sleeve 4, the upper screwing cap 5, the upper pushing disc 6, the lower screwing cap 7, the lower pushing disc 8, the locking ring 9, the first bump 10, the first strip-shaped avoiding gap 11, the upper limiting ring 12, the upper connecting ring 13, the first clamping groove 14, the annular cover plate 15, the clamping block 16, the annular flange 17, the second bump 18, the second strip-shaped avoiding gap 19, the through hole 20, the lower limiting ring 21, the lower connecting ring 22, the second clamping groove 23, the contraction gap 24, the clamping strip 25, the inserting pin 26, the annular groove 27 and the avoiding groove 28.

Detailed Description

In the following description, for purposes of explanation, numerous implementation details are set forth in order to provide a thorough understanding of the various embodiments of the present invention. It should be understood, however, that these implementation details are not to be interpreted as limiting the invention. That is, in some embodiments of the invention, such implementation details are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.

In addition, the descriptions related to the first, the second, etc. in the present invention are only used for description purposes, do not particularly refer to an order or sequence, and do not limit the present invention, but only distinguish components or operations described in the same technical terms, and are not understood to indicate or imply relative importance or implicitly indicate the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1 to 8, a detachable eraser connector suitable for ends of multiple-specification pencils comprises a penholder 1 and an eraser 2, a connecting device 3 for connecting the penholder 1 and the eraser 2 is arranged between the penholder 1 and the eraser 2, the connecting device 3 comprises a sleeve 4, an eraser pushing mechanism and a penholder locking mechanism, axes of the sleeve 4, the eraser pushing mechanism, the penholder locking mechanism, the penholder 1 and the eraser 2 are overlapped, the eraser pushing mechanism and the penholder locking mechanism are respectively arranged at two ends of the sleeve 4, the eraser pushing mechanism comprises an upper rotating cap 5 and an upper pushing disc 6, the upper rotating cap 5 is rotatably sleeved at one end of the sleeve 4, the upper pushing disc 6 is movably arranged at the inner side of the sleeve 4, the inner wall of the upper rotating cap 5 is in threaded connection with the outer edge of the upper pushing disc 6, the penholder locking mechanism comprises a lower rotating cap 7, a lower rotating disc 8 and a locking ring 9, the lower rotating cap 7 is rotatably arranged at the other end of the sleeve 4, the lower push disc 8 is movably arranged on the inner side of the sleeve 4, the locking ring 9 is positioned on one side of the lower push disc 8 far away from the upper push disc 6, and the inner wall of the lower screw cap 7 is in threaded connection with the outer edge of the lower push disc 8.

The upper push disc 6 and the sleeve 4 are coaxially arranged, three first convex blocks 10 are evenly arranged on the outer edge of the upper push disc 6 in the circumferential direction, a first strip-shaped avoiding notch 11 corresponding to the three first convex blocks 10 in a one-to-one mode is arranged on the cylindrical wall of the sleeve 4, the length direction of the first strip-shaped avoiding notch 11 is parallel to the axis of the sleeve 4, the outer end of the first convex block 10 extends out of the strip-shaped avoiding through hole and is in threaded connection with the outer wall of the upper spin cap 5, and the outer edge of the upper push disc is attached to the inner wall of the sleeve 4. Thereby drive the axial displacement of push-up dish 6 along sleeve 4 through the rotation of upper rotating cap 5, first strip is dodged breach 11 and is used for making first lug 10 can slide along the axial of sleeve 4, and then makes push-up dish 6 can outwards push out a bit with the eraser 2 of establishing the card at the sleeve 4 tip.

The fixed spacing ring 12 that is provided with on the outer cylinder wall of sleeve 4, the one end that the cap 5 was screwed on to last spacing ring 12 was kept away from is provided with an go up go-between 13, go up the go-between 13 cover and locate the sleeve 4 outside, the cap 5 of screwing on and the one end inner wall that goes up the spacing ring 12 that last go-between 13 is close to all is provided with first draw-in groove 14, the thickness of every first draw-in groove 14 is equalling in the thickness of spacing ring 12, the width of every first draw-in groove 14 is the half of spacing ring 12 width on, go up fixed connection between go-between 13 and the cap 5. The upper connecting ring 13 and the first clamping groove 14 at the end part of the upper spin cap 5 are used for accommodating the upper limiting ring 12 together, and the part of the joint of the upper connecting ring 13 and the upper spin cap 5 is welded by ultrasonic waves to prevent the upper spin cap 5 from moving axially during rotation, so that the upper spin cap 5 can drive the push-up disc 6 to move axially during rotation.

The end of the sleeve 4 is provided with an annular cover plate 15 coaxial with the end, one side of the annular cover plate 15 close to the sleeve 4 is uniformly provided with three fixture blocks 16 along the circumferential direction, the three fixture blocks 16 are in one-to-one correspondence with the three first strip-shaped avoiding openings of the notches 11 and are clamped, one side of the annular cover plate 15 close to the sleeve 4 is also provided with an annular flange 17, the inner wall of one end of the upper screwing cap 5 close to the annular cover plate 15 is provided with a ring groove 27 for avoiding the annular flange 17, the inner wall of the annular flange 17 is in clamping fit with the outer wall of the sleeve 4, and the three fixture blocks 16 are positioned on. The annular cover plate 15 is used for preventing the upward pushing disc 6 from being separated from the end part of the sleeve 4 along with the rotation of the upward screwing cap 5, the annular cover plate 15 is clamped at the end part of the sleeve 4 through the annular flange 17, and meanwhile, the three clamping blocks 16 are correspondingly inserted into the three first strip-shaped avoiding notches 11 one by one.

The lower push disc 8 and the sleeve 4 are coaxially arranged, three second convex blocks 18 are evenly arranged at the outer edge of the lower push disc 8 along the circumferential direction, a second strip-shaped avoiding notch 19 corresponding to the three second convex blocks 18 one to one is arranged on the cylindrical wall of the sleeve 4, the length direction of the second strip-shaped avoiding notch 19 is parallel to the axis of the sleeve 4, the outer end of the second convex block 18 extends out of the strip-shaped avoiding through hole and is in threaded connection with the outer wall of the lower screwing cap 7, a gap is reserved between the outer edge of the lower push disc and the inner wall of the sleeve 4, and a through hole 20 used for avoiding the pen body 1 is formed in the center of the lower push disc. Thereby through the rotation of lower turncap 7 drive down push disk 8 along the axial displacement of sleeve 4, breach 19 is dodged to the second bar and is used for making second lug 18 can slide along the axial of sleeve 4, and then makes push disk 8 outwards promote catch 9, and then locks with body of a pen 1 through catch 9.

The fixed spacing ring 21 that is provided with down on the outer cylinder wall of sleeve 4, the one end that cap 7 was screwed down to spacing ring 21 is kept away from down is provided with a lower go-between 22, the sleeve 4 outside is located to lower go-between 22 cover, cap 7 and the one end inner wall that lower go-between 22 is close to spacing ring 21 down all are provided with second draw-in groove 23 down, the thickness of every second draw-in groove 23 is equalling in the thickness of spacing ring 21 down, the width of every second draw-in groove 23 is the half of spacing ring 21 width down, go-between 22 and screw down fixed connection between the cap 7 down. The lower connecting ring 22 and the second clamping groove 23 at the end part of the lower screwing cap 7 are used for accommodating the lower limiting ring 21 together, and the part of the joint of the lower connecting ring 22 and the lower screwing cap 7 is welded by ultrasonic waves to prevent the lower screwing cap 7 from moving axially in rotation, so that the lower screwing cap 7 can drive the lower pushing disc 8 to move axially in rotation.

The lock ring 9 and the lower push disk 8 coaxial line set up, and the lock ring 9 is made by the elastic material to one side that the lock ring 9 is close to the lower push disk 8 is provided with a plurality of shrink clearance 24, and all shrink clearance 24 are along the circumferencial direction evenly distributed of lock ring 9, and every shrink clearance 24's length is less than the thickness of lock ring 9, and the one end outer fringe that the lock ring 9 kept away from the lower push disk 8 is the fillet structure, and the lock ring 9 is equipped with one side of shrink clearance 24 and is contradicted with the lower push disk 8. When the outer edge of the locking ring 9 is pressed, all the constricted gaps 24 will be forced closer together and clamp the pen body 1 through its center.

The sleeve 4 decreases from the lower limit ring 21 toward the inner diameter of the pen body 1, and the minimum inner diameter of the sleeve 4 is larger than the inner diameter of the lock ring 9 and smaller than the outer diameter of the lock ring 9. When the push-down disk 8 pushes the lock ring 9 outwards, the inner diameter of the sleeve 4 decreases from the lower limit ring 21 to the pen body 1, so that the lock ring 9 is pressed to be tighter and tighter along with the movement of the lock ring 9 until the pen body 1 is tightly clamped.

The inner wall of one end of the sleeve 4 close to the eraser 2 is uniformly provided with three clamping strips 25 along the circumferential direction, the length direction of the clamping strips 25 is parallel to the axis of the sleeve 4, and the center of one side of the push-up plate 6 close to the eraser 2 is provided with a contact pin 26. The clamping strip 25 is used for preventing the eraser 2 from falling off due to insufficient friction force after being inserted, an avoiding groove 28 for avoiding the clamping strip 25 is correspondingly arranged at the outer edge of the push-up plate 6, and the inserting pin 26 is used for inserting the bottom of the eraser 2 and preventing the eraser 2 from falling off and peeling off from the push-up plate 6 when the eraser 2 is about to be used up.

The working principle is as follows: when the connecting device is used, one end of each of two ends of the connecting device 3 is used for connecting the pen body 1, the other end of each of the two ends of the connecting device is used for installing the eraser 2, a through hole 20 for avoiding the pen body 1 is formed in the center of the lower push disc, the lower push disc 8 is driven to move along the axial direction of the sleeve 4 through rotation of the lower screw cap 7, the second strip-shaped avoiding gap 19 is used for enabling the second bump 18 to slide along the axial direction of the sleeve 4, the lower push disc 8 can further push the locking ring 9 outwards, when the outer edge of the locking ring 9 is under pressure, all the contraction gaps 24 are stressed to be close to each other, and the pen body 1 passing through the center of the; when the eraser 2 is installed, the clamping strip 25 is used for preventing the eraser 2 from falling off due to insufficient friction force after being inserted, the upper rotating cap 5 rotates to drive the upper pushing disc 6 to move along the axial direction of the sleeve 4, the first strip-shaped avoiding notch 11 is used for enabling the first protruding block 10 to slide along the axial direction of the sleeve 4, and further the upper pushing disc 6 can push the eraser 2 clamped at the end part of the sleeve 4 outwards a little.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a be suitable for removable eraser connector of many specifications pencil tip, includes pen body (1) and eraser (2), its characterized in that: a connecting device (3) used for connecting the pen body (1) and the eraser (2) is arranged between the pen body (1) and the eraser (2), the connecting device (3) comprises a sleeve (4), an eraser pushing mechanism and a pen holder locking mechanism, the sleeve (4), the eraser pushing mechanism, the pen holder locking mechanism and the pen body (1) and the eraser (2) are overlapped in axis, the eraser pushing mechanism and the pen holder locking mechanism are respectively arranged at two ends of the sleeve (4), the eraser pushing mechanism comprises an upper rotating cap (5) and an upper pushing disc (6), the upper rotating cap (5) can be rotatably sleeved at the outer side of one end of the sleeve (4), the upper pushing disc (6) can be movably arranged at the inner side of the sleeve (4), the inner wall of the upper rotating cap (5) is in threaded connection with the outer edge of the upper pushing disc (6), the pen holder locking mechanism comprises a lower rotating cap (7), a lower pushing disc (8) and a locking ring (9), the lower rotating cap (7) can be rotatably arranged at the outer side of the, the downward pushing disc (8) is movably arranged on the inner side of the sleeve (4), the locking ring (9) is positioned on one side, far away from the upward pushing disc (6), of the downward pushing disc (8), and the inner wall of the downward rotating cap (7) is in threaded connection with the outer edge of the downward pushing disc (8);

the inner wall of one end, close to the eraser (2), of the sleeve (4) is evenly provided with three clamping strips (25) along the circumferential direction, the length direction of each clamping strip (25) is parallel to the axis of the sleeve (4), and the center of one side, close to the eraser (2), of the push-up disc (6) is provided with a contact pin (26).

2. The removable eraser connector of claim 1, wherein: go up push-up dish (6) and sleeve (4) coaxial line setting, the outer fringe of push-up dish (6) evenly is provided with three first lug (10) along the circumferencial direction, be provided with the first bar of three and first lug (10) one-to-one on the cylinder wall of sleeve (4) and dodge breach (11), the length direction that breach (11) were dodged to first bar is parallel with the axis of sleeve (4), the outer end of first lug (10) stretches out the bar and dodges the through-hole and with the outer wall threaded connection of last screw cap (5), the outer fringe of push-up dish and the inner wall laminating of sleeve (4).

3. The removable eraser connector of claim 2, wherein: the outer cylinder wall of sleeve (4) is gone up to fix and is provided with spacing ring (12) on, the one end that last spacing ring (12) kept away from last cap (5) of revolving is provided with one and goes up go-between (13), go up go-between (13) cover and locate the sleeve (4) outside, the one end inner wall that goes up cap (5) and last go-between (13) and be close to spacing ring (12) of revolving all is provided with first draw-in groove (14), the thickness of every first draw-in groove (14) is equalling in the thickness of last spacing ring (12), the width of every first draw-in groove (14) is the half of last spacing ring (12) width, go up fixed connection between go-between (13) and the last cap (5.

4. The removable eraser connector of claim 3, wherein: the end of the sleeve (4) is provided with an annular cover plate (15) coaxial with the sleeve, one side of the annular cover plate (15) close to the sleeve (4) is uniformly provided with three fixture blocks (16) along the circumferential direction, the three fixture blocks (16) are in one-to-one correspondence with three first strip-shaped avoidance notches (11) to be clamped at the opening, one side of the annular cover plate (15) close to the sleeve (4) is further provided with an annular flange (17), the inner wall of one end of the upper spin cap (5) close to the annular cover plate (15) is provided with a ring groove (27) for avoiding the annular flange (17), the inner wall of the annular flange (17) is clamped and matched with the outer wall of the sleeve (4), and the three fixture blocks (16) are located on the inner.

5. The removable eraser connector of claim 1, wherein: lower push disc (8) and sleeve (4) coaxial line setting, the outer fringe of lower push disc (8) evenly is provided with three second lug (18) along the circumferencial direction, be provided with the second bar of three and second lug (18) one-to-one on the cylinder wall of sleeve (4) and dodge breach (19), the length direction of breach (19) is dodged to the second bar is parallel with the axis of sleeve (4), the outer end of second lug (18) stretches out the bar and dodges the through-hole and with the outer wall threaded connection of cap (7) down, the outer fringe of lower push disc leaves the clearance with the inner wall of sleeve (4), the center department of lower push disc is provided with one and is used for dodging perforation (20) of shaft (1).

6. The removable eraser connector of claim 5, wherein: the outer cylinder wall of sleeve (4) is gone up the fixed retaining ring (21) that is provided with down, the one end that cap (7) were revolved down in keeping away from in retaining ring (21) is provided with a lower go-between (22), sleeve (4) outside is located in lower go-between (22) cover, the one end inner wall that cap (7) were revolved down and lower go-between (22) were close to retaining ring (21) down all is provided with second draw-in groove (23), the thickness of every second draw-in groove (23) is equalling in the thickness of retaining ring (21) down, the width of every second draw-in groove (23) is the half of retaining ring (21) width down, go-between (22) and the cap (7) of revolving down fixed connection.

7. The removable eraser connector of claim 6, wherein: catch (9) and lower pushing disk (8) coaxial line set up, catch (9) are made by elastic material, and catch (9) are close to one side of pushing disk (8) down and are provided with a plurality of shrink clearance (24), the circumferencial direction evenly distributed of catch (9) is followed in all shrink clearance (24), the length in every shrink clearance (24) is less than the thickness of catch (9), the one end outer fringe that catch (9) kept away from down pushing disk (8) is the fillet structure, one side that catch (9) were equipped with shrink clearance (24) is contradicted with lower pushing disk (8).

8. The removable eraser connector of claim 7, wherein: the sleeve (4) is reduced from the inner diameter of the lower limiting ring (21) towards the direction of the pen body (1), and the minimum inner diameter of the sleeve (4) is larger than the inner diameter of the locking ring (9) and smaller than the outer diameter of the locking ring (9).