Eraser

Abstract

The utility model relates to an eraser and relates to the technical field of stationery, the eraser comprises an eraser strip, a sleeve arranged outside the eraser strip in a sleeving mode and an adjusting head connected with one end of the sleeve, an adjusting through hole for the eraser strip to penetrate through is formed in the adjusting head, and a clamping assembly and a pushing assembly are arranged on the side face of the sleeve; the clamping assembly comprises a clamping pipe located in the sleeve, a clamping sleeve and a plurality of clamping blocks, the clamping pipe is provided with a guide through hole allowing the rubber strip to penetrate through, and the clamping blocks are evenly and fixedly arranged on the outer edge of an opening, facing the side face of the adjusting head, of the clamping pipe; the clamping sleeve is arranged on the periphery of the clamping pipe in a sliding and sleeving mode, and a limiting sinking groove used for limiting the clamping sleeve in a sliding mode is formed in the inner wall of the sleeve. The pushing assembly comprises a pressing head located at the end of the sleeve and a reset piece located in the sleeve. Therefore, the possibility that the eraser strip is contaminated by more dust or other impurities during application is reduced.

Description

Technical Field

[0001] This application relates to the technical field of stationery, and particularly to an eraser. Background Art

[0002] The long history of erasers can be traced back to the 18th century, and its birth marked a major innovation in writing and modification methods. In 1770, the British chemical pioneer Joseph Priestley accidentally discovered that rubber had the magical ability to remove pencil marks. Subsequently, the engineer Edward Nairne ingeniously transformed this discovery into a practical product - the prototype of the modern eraser, greatly improving the convenience of writing and editing.

[0003] At the detailed level of technical application, the eraser effectively removes graphite particles through its subtle frictional interaction with the paper surface, achieving a seamless erasure of handwriting. In this process, the softness and friction of the eraser play crucial roles, jointly determining the erasure effect and user experience.

[0004] However, there is still room for optimization in the packaging and usage methods of existing erasers. Traditionally, erasers are wrapped in wrapping paper, and only part of the side is exposed for wiping during initial use. But as use progresses, users often need to tear the wrapping paper to fully expose the eraser. This not only increases the complexity of the operation but also may cause the eraser to be more likely to adsorb dust and impurities during subsequent use, affecting its cleaning effect and service life, and there is room for improvement. Utility Model Content

[0005] The purpose of this application is to provide an eraser to solve the problem that in the middle and late stages of application, the eraser is fully exposed, easily adsorbs dust and impurities, and affects its cleaning effect and service life in the above-mentioned related technologies.

[0006] An eraser provided by this application adopts the following technical solution:

[0007] An eraser includes an eraser strip, a sleeve sleeved outside the eraser strip, and an adjustment head connected to one end of the sleeve. An adjustment through-hole for the eraser strip to pass through is opened on the adjustment head. A clamping assembly and a pushing assembly are provided on the side of the sleeve; the clamping assembly includes a clamping tube, a clamping sleeve, and several clamping blocks located inside the sleeve. A guiding through-hole for the eraser strip to pass through is opened on the clamping tube. Several clamping blocks are uniformly fixed on the outer edge of the opening on the side of the clamping tube facing the adjustment head; the clamping sleeve is slidably sleeved on the outer periphery of the clamping tube, and a limiting sunk groove for sliding limit of the clamping sleeve is provided on the inner wall of the sleeve; the pushing assembly includes a pressing head located at the end of the sleeve and a reset member located inside the sleeve. The clamping blocks slide relative to the clamping sleeve when the pressing head is pressed and release the clamping of the eraser strip, and the reset member drives the clamping blocks to clamp the eraser strip again when the pressing stops.

[0008] By adopting the above technical scheme, under normal conditions, the clamping sleeve is arranged on the common periphery of several clamping blocks, so that the clamping blocks are tightened inwardly and clamp the rubber strip; when the end of the rubber strip passing through the adjusting through hole is consumed, the clamping tube and the clamping block can be pressed relative to the clamping sleeve by pressing the pressing head, so that the clamping block releases the clamping state of the rubber strip (the clamping block opens outward), that is, the part of the rubber strip located in the sleeve slides out of the adjusting through hole, and then after stopping pressing the pressing head, the clamping tube and the clamping block are reset under the action of the reset member, and the rubber strip is clamped again; with this arrangement, the possibility of the rubber strip itself being contaminated with a lot of dust or other impurities during use is reduced.

[0009] Optionally, a limiting protrusion is fixedly provided on the outer circumference of the clamping tube, and a guiding groove for the limiting protrusion to be inserted and slide is opened on the outer circumference of the clamping sleeve along its own axial direction.

[0010] By adopting the above technical solution, due to the matching arrangement of the limiting protrusion and the guide groove, the sliding range of the clamping sleeve is further limited, thereby ensuring the clamping effect of the clamping tube and the clamping block on the rubber strip when used.

[0011] Optionally, a clearance opening communicating with the guide slot is provided on the opening edge of the clamping sleeve away from the adjusting head, a guiding slope is provided on the inner edge of the opening of the guiding slot, and a guiding slope capable of fitting with the guiding slope is provided on the limiting protrusion.

[0012] By adopting the above technical solution, when the clamping sleeve and the clamping tube are assembled, the limiting protrusion can be inserted into the guide groove along the guiding inclined surface and the guide inclined surface, through the clearance opening, so as to facilitate the assembly and fixation of the clamping sleeve and the clamping tube and improve the corresponding assembly efficiency.

[0013] Optionally, a reinforcing convex ring is fixedly provided on the outer periphery of the end portion of the clamping sleeve facing the adjusting head.

[0014] By adopting the above technical solution, the structural strength of the clamping sleeve is improved due to the arrangement of the reinforcing convex ring.

[0015] Optionally, a protective sleeve is fixedly sleeved on the outer periphery of the sleeve, and the connection between the adjusting head and the sleeve abuts against the inner wall of the protective sleeve.

[0016] By adopting the above technical solution, due to the installation of the protective sleeve, the connection between the adjusting head and the sleeve is protected, and it is also convenient for users to hold and use the eraser. The user can directly hold the outer side of the protective sleeve to use the eraser.

[0017] Optionally, a plurality of anti-slip grooves are provided on the outer circumference of the protective sleeve along its own axial direction.

[0018] By adopting the above technical solution, the possibility of relative sliding when the user holds the protective sleeve is reduced, and its service performance is improved.

[0019] Optionally, an annular rib is fixedly provided on the inner wall of the protective sleeve, and an annular groove for inserting the annular rib is formed on the outer periphery of the adjusting head.

[0020] By adopting the above technical solution, due to the arrangement of the annular rib and the annular groove, when the protective sleeve is installed and fixed, the annular rib on the protective sleeve is inserted into the annular groove inside the outer periphery of the adjusting head, thereby realizing the installation and fixation of the protective sleeve.

[0021] Optionally, a relief groove for inserting the sleeve is formed on the inner wall of the protective sleeve, a positioning convex ring is fixedly provided on the outer periphery of the adjusting head, and one side of the positioning convex ring abuts against the inner wall of the relief groove.

[0022] By adopting the above technical solution, after the protective sleeve is installed, one side of the positioning convex ring abuts against the inner wall of the relief groove, further improving the installation stability of the protective sleeve.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. When the end of the rubber strip passing through the adjusting through hole is consumed, the clamping state of the rubber strip can be released by pressing the pushing assembly, so that a part of the rubber strip located in the sleeve slides out of the adjusting through hole, and then after stopping pressing the pushing assembly, the clamping assembly clamps the rubber strip again; thereby reducing the possibility that the rubber strip is contaminated with more dust or other impurities during application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for description in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 is the overall structural schematic diagram of the embodiment of the present application;

[0027] Figure 2 is the exploded structural schematic diagram of the embodiment of the present application;

[0028] Figure 3 is the cross-sectional structural schematic diagram showing the installation and cooperation of the clamping tube and the clamping sleeve in the embodiment of the present application;

[0029] Figure 4 is the partial cross-sectional structural schematic diagram showing the installation and cooperation of the rubber strip and the sleeve in the embodiment of the present application;

[0030] Figure 5 It is a partial structural schematic diagram showing the installation and cooperation of the clamping sleeve and the clamping tube in the embodiment of the present application;

[0031] Figure 6 It is a partial sectional structural schematic diagram showing the installation and cooperation of the propulsion assembly in the embodiment of the present application;

[0032] Figure 7 It is a partial sectional structural schematic diagram showing the installation and cooperation of the protective sleeve in the embodiment of the present application;

[0033] Figure 8 is Figure 7 an enlarged schematic diagram of part A in

[0034] In the figure, 1 is a rubber strip; 2 is a sleeve; 21 is a limiting sunk groove; 22 is a positioning sunk groove; 3 is an adjusting head; 31 is an adjusting through hole; 32 is an annular sunk groove; 33 is a positioning convex ring; 4 is a clamping assembly; 41 is a clamping tube; 411 is a guiding through hole; 412 is a limiting convex block; 4121 is a guiding inclined surface; 413 is a limiting convex ring; 42 is a clamping sleeve; 421 is a guiding through groove; 422 is a relief opening; 423 is a guiding inclined surface; 424 is a reinforcing convex ring; 43 is a clamping block; 5 is a propulsion assembly; 51 is a pressing head; 52 is a reset member; 521 is a reset spring; 6 is a protective sleeve; 61 is an anti-slip groove; 62 is an annular rib; 63 is a relief sunk groove. Detailed implementation manners

[0035] The following further describes the present application in detail in conjunction with all the drawings.

[0036] Embodiment:

[0037] Referring to Figure 1 、 Figure 2 and Figure 3 An eraser includes a rubber strip 1, a sleeve 2 sleeved outside the rubber strip 1, and an adjusting head 3 connected to one end of the sleeve 2. An adjusting through hole 31 for the rubber strip 1 to penetrate is provided on the adjusting head 3. A clamping assembly 4 for clamping the rubber strip 1 and a propulsion assembly 5 for releasing the clamping state of the rubber strip 1 are provided on the side surface of the sleeve 2;

[0038] When the end of the rubber strip 1 passing through the adjusting through hole 31 is consumed, the clamping state of the rubber strip 1 can be released by pressing the propulsion assembly 5, so that a part of the rubber strip 1 located in the sleeve 2 slides out of the adjusting through hole 31. Then, after stopping pressing the propulsion assembly 5, the clamping assembly 4 clamps the rubber strip 1 again.

[0039] Referring to Figure 2 and Figure 4The clamping assembly 4 includes a clamping tube 41, a clamping sleeve 42 and four clamping blocks 43 located in the sleeve 2. The clamping tube 41 is provided with a guide through hole 411 for the rubber strip 1 to pass through. The four clamping blocks 43 are evenly fixed on the outer edge of the opening of the clamping tube 41 on the side facing the adjusting head 3; the clamping sleeve 42 is slidably sleeved on the outer periphery of the clamping tube 41, and can tighten the four clamping blocks 43 inward, thereby clamping the rubber strip 1.

[0040] Reference Figure 4 and Figure 5 The adjusting head 3 and one end of the sleeve 2 are connected by threaded fastening, which is a conventional structure and will not be described in detail here; a limiting groove 21 for slidingly limiting the clamping sleeve 42 is provided on the inner wall of the opening of the sleeve 2 facing the adjusting head 3. After the adjusting head 3 and the sleeve 2 are installed, the sleeve 2 is inside the limiting groove 21 and can only slide back and forth inside the limiting groove 21;

[0041] Two symmetrical limiting protrusions 412 are integrally formed on the outer periphery of the clamping tube 41 , and a guide groove 421 for the limiting protrusions 412 to be inserted and slide is provided on the outer periphery of the clamping sleeve 42 along its own axial direction, thereby realizing sliding limiting of the clamping sleeve 42 .

[0042] Reference Figure 5 A clearance opening 422 communicating with the guide slot 421 is provided on the opening edge of the clamping sleeve 42 away from the adjusting head 3, a guide slope 423 is provided on the opening inner edge of the guide slot 421, and a guide slope 4121 capable of fitting with the guide slope 423 is provided on the limiting protrusion 412;

[0043] The limiting protrusion 412 can be inserted into the guide groove 421 along the guide inclined surface 423 and the guide inclined surface 4121, through the clearance opening 422, so as to facilitate the assembly and fixation of the clamping sleeve 42 and the clamping tube 41, and improve the corresponding assembly efficiency. A reinforcing protrusion ring 424 is integrally formed on the outer periphery of the end of the clamping sleeve 42 facing the adjustment head 3, so as to improve the structural strength of the clamping sleeve 42.

[0044] Reference Figure 6 The propulsion assembly 5 includes a pressing head 51 located at the end of the sleeve 2 and a reset member 52 located inside the sleeve 2. When the pressing head 51 presses, the clamping block 43 slides relative to the clamping sleeve 42 and releases the clamping of the rubber strip 1. When the pressing stops, the reset member 52 drives the clamping block 43 to clamp the rubber strip 1 again.

[0045] Reference Figure 6, one end of the pressing head 51 is slidably inserted into the end opening of the sleeve 2 away from the adjusting head 3, and the part of the pressing head 51 inserted into the sleeve 2 abuts against the end of the clamping tube 41 away from the adjusting head 3; the resetting member 52 is a reset spring 521 on the outer periphery of the clamping tube 41, and a positioning sink 22 for placing the reset spring 521 is provided on the inner wall of the sleeve 2. A limiting convex ring 413 is fixedly provided on the outer periphery of the clamping tube 41, and both ends of the reset spring 521 abut against the side wall of the positioning sink 22 and one side of the limiting convex ring 413 respectively; when the pressing head 51 is pressed in the direction close to the adjusting head 3, the reset spring 521 is compressed; when the pressing on the pressing head 51 stops, the reset spring 521 drives the clamping tube 41 to reset.

[0046] Referring to Figure 7 , a protective sleeve 6 is fixedly sleeved on the outer periphery of the sleeve 2, and the connection between the adjusting head 3 and the sleeve 2 abuts against the inner wall of the protective sleeve 6; and a plurality of anti-slip grooves 61 are uniformly distributed on the outer periphery of the protective sleeve 6 along the axis direction of itself, which is convenient for the user to better hold the protective sleeve 6 and improve the use performance of the eraser.

[0047] Referring to Figure 7 and Figure 8 , an annular rib 62 is integrally formed on the inner wall of the protective sleeve 6, and an annular sink 32 for inserting the annular rib 62 is provided on the outer periphery of the adjusting head 3, so as to realize the installation and fixation of the protective sleeve 6. A yielding sink 63 for inserting the sleeve 2 is provided on the inner wall of the protective sleeve 6, and a positioning convex ring 33 is integrally formed on the outer periphery of the adjusting head 3. One side of the positioning convex ring 33 abuts against the inner wall of the yielding sink 63 to improve the installation stability of the protective sleeve 6.

[0048] The implementation principle of the embodiment of the present application is as follows:

[0049] When the end of the rubber strip 1 passing through the adjusting through hole 31 is consumed, the pressing and pushing assembly 5 can be pressed to release the clamping state of the rubber strip 1, so that a part of the rubber strip 1 located in the sleeve 2 slides out of the adjusting through hole 31, and then after stopping pressing the pressing and pushing assembly 5, the clamping assembly 4 clamps the rubber strip 1 again.

[0050] Unless otherwise defined, the terms or scientific terms used in this application shall have the ordinary meanings as understood by those of ordinary skill in the art to which this application pertains. The terms "first", "second", "third" and similar terms used in the text of this application do not denote any order, quantity or importance, but are only used to distinguish different components. Similar terms such as "a" or "an" do not denote a quantity limitation, but mean that there is at least one. Terms such as "comprising" or "including" mean that the elements or objects appearing before "comprising" or "including" cover the elements or objects listed after "comprising" or "including" and their equivalents, and do not exclude other elements or objects. Terms such as "upper", "lower", "left", "right" are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationships may also change accordingly.

[0051] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. The same components are denoted by the same reference numerals. Therefore, all equivalent changes made according to the structure, shape and principle of this application shall be covered within the protection scope of this application.

Claims

1. An eraser, characterized in that, The invention comprises a rubber strip (1), a sleeve (2) sleeved on the outside of the rubber strip (1), and an adjusting head (3) connected to one end of the sleeve (2); the adjusting head (3) is provided with an adjusting through hole (31) for the rubber strip (1) to pass through; the side of the sleeve (2) is provided with a clamping assembly (4) and a propulsion assembly (5); the clamping assembly (4) comprises a clamping tube (41) located in the sleeve (2), a clamping sleeve (42), and a plurality of clamping blocks (43); the clamping tube (41) is provided with a guide through hole (411) for the rubber strip (1) to pass through; and a plurality of clamping blocks (43) are evenly fixed on the outer edge of the opening of the clamping tube (41) on the side facing the adjusting head (3); The clamping sleeve (42) is slidably mounted on the outer periphery of the clamping tube (41), and a limiting groove (21) for limiting the sliding position of the clamping sleeve (42) is provided on the inner wall of the sleeve (2); the propulsion assembly (5) comprises a pressing head (51) located at the end of the sleeve (2) and a reset member (52) located inside the sleeve (2); when the pressing head (51) presses, the clamping block (43) slides relative to the clamping sleeve (42) and releases the clamping of the rubber strip (1); when the pressing stops, the reset member (52) drives the clamping block (43) to clamp the rubber strip (1) again.

2. A kind of eraser according to claim 1, characterized in that, A limiting protrusion (412) is fixedly provided on the outer periphery of the clamping tube (41), and a guiding groove (421) for the limiting protrusion (412) to be inserted and slide is opened on the outer periphery of the clamping sleeve (42) along its own axial direction.

3. A kind of eraser according to claim 2, characterized in that, A clearance opening (422) communicating with the guide slot (421) is provided on the opening edge of the clamping sleeve (42) away from the regulating head (3); a guide slope (423) is provided on the inner edge of the opening of the guide slot (421); and a guide slope (4121) capable of fitting with the guide slope (423) is provided on the limiting protrusion (412).

4. An eraser according to claim 1, characterized in that, A reinforcing convex ring (424) is fixedly provided on the outer periphery of the end portion of the clamping sleeve (42) facing the adjusting head (3).

5. An eraser according to claim 1, characterized in that, A protective sleeve (6) is fixedly sleeved on the outer periphery of the sleeve (2), and the connection between the regulating head (3) and the sleeve (2) abuts against the inner wall of the protective sleeve (6).

6. An eraser according to claim 5, characterized in that, A plurality of anti-slip grooves (61) are provided on the outer periphery of the protective sleeve (6) along its own axial direction.

7. An eraser according to claim 5, characterized in that, An annular convex strip (62) is fixedly provided on the inner wall of the protective sleeve (6), and an annular recessed groove (32) for the annular convex strip (62) to be inserted is provided on the outer periphery of the regulating head (3).

8. An eraser according to claim 7, characterized in that, The inner wall of the protective sleeve (6) is provided with a recessed groove (63) for inserting the sleeve (2), and a positioning convex ring (33) is fixedly provided on the outer periphery of the regulating head (3), and one side of the positioning convex ring (33) abuts against the inner wall of the recessed groove (63).

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