Eraser assembly capable of preventing breakage

Abstract

The utility model discloses an eraser assembly capable of preventing breakage. The eraser assembly comprises an eraser body, an inner shell, an outer shell and a rotary cover. The eraser body is in a column shape, and the eraser body is arranged in the inner shell in a sleeved mode. Rotating shafts are formed on the two sides of the top of the inner shell respectively, and the two sides of the rotating cover are rotationally connected to the two rotating shafts respectively; the side surface of the rotary cover is fan-shaped; the inner shell is movably arranged in the outer shell in a sleeved mode. The eraser assembly has the advantage that the eraser is prevented from being torn or broken easily.

Description

Technical Field

[0001] The utility model relates to the technical field of stationery products, in particular to a rubber component which can prevent breakage. Background Art

[0002] In 1770, British scientist Joseph Priestley said: "I have seen a substance which is very suitable for erasing pencil markings." At that time, the whole of Europe used rubber particles cut into small cubes to erase handwriting. This substance was called an eraser.

[0003] Early erasers were not very convenient because the unprocessed rubber was easily corrupted. It was not until 1839 that inventor Charles Goodyear discovered that vulcanization could improve the quality of rubber, and erasers became reliable.

[0004] With the development of the times and the advancement of technology, there are more and more types of erasers nowadays. Some pencils are equipped with a small eraser at the end, which is mostly pink in color, to erase the pencil marks, but if this eraser is used too hard, it will tear the paper. There is also a soft eraser in the shape of a square. Its strength makes it leave no residue, but this eraser cannot be used to erase large areas of notes. There is also a brown eraser with a soft and rough texture, which is convenient for erasing large areas of marks, but this eraser is generally effective in removing handwriting. Even in some stationery erasers, volatile oils are added to increase the fragrance of the eraser. And so on.

[0005] These erasers in the prior art all have a characteristic, that is, they lack wrapping and supporting properties, so that the entire eraser is easily torn when used, and the torn eraser becomes difficult to use or even unusable due to its divided volume. Summary of the invention

[0006] In order to solve the problems raised in the above background technology, the purpose of the utility model is to provide a rubber component that prevents breakage, which has the advantages of effectively preventing the rubber from being split, avoiding the tearing effect caused by stress concentration, and ensuring the integrity of the rubber as much as possible.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] The utility model provides a rubber component for preventing breakage, comprising a rubber body, an inner shell, an outer shell and a rotating cover;

[0009] The rubber body is columnar, and is sleeved in the inner shell;

[0010] Rotating shafts are formed on both sides of the top of the inner shell, and both sides of the rotating cover are rotatably connected to the two rotating shafts;

[0011] The side surface of the rotating cover is fan-shaped;

[0012] The inner shell is movably sleeved and placed in the outer shell.

[0013] In the preferred technical solution of the utility model, the rotating cover comprises a first sector-shaped piece, a second sector-shaped piece, and an arc-shaped piece;

[0014] The first sector-shaped piece and the second sector-shaped piece are arranged in parallel,

[0015] Two sides of the arc-shaped piece are respectively fixed to the first sector-shaped piece and the second sector-shaped piece;

[0016] The ends of the first sector-shaped piece and the second sector-shaped piece are respectively formed with through holes, and the first sector-shaped piece and the second sector-shaped piece are respectively movably sleeved on the rotating shaft through the through holes.

[0017] In a preferred technical solution of the present utility model, at least one side of the top of the rubber body is formed with an arc surface, and one of the arc surfaces abuts against the inner wall of the arc piece.

[0018] In the preferred technical solution of the utility model, the side wall of the inner shell is formed with a barb structure, and the large end of the barb structure faces the end of the inner shell where the rotating cover is located;

[0019] The plurality of barb structures are evenly distributed along the length direction of the inner shell.

[0020] In a preferred technical solution of the utility model, limiting blocks are respectively formed on both sides of one end of the inner shell, and the limiting blocks are used to limit the rotation stroke of the rotating cover.

[0021] In the preferred technical solution of the utility model, it also includes a bottom gasket, which is fixed to one end of the shell;

[0022] And the cross-sectional area of ​​the bottom gasket is larger than the cross-sectional area of ​​the shell.

[0023] In a preferred technical solution of the present utility model, an adhesive layer or a magnetic patch is formed on the surface of the bottom gasket facing away from the shell.

[0024] In the preferred technical solution of the utility model, the rubber body is in the shape of a square column, the cross section of the inner shell is in the shape of a rectangular ring; the outer shell matches the shape of the inner shell;

[0025] Arc-shaped transitions are respectively formed at four edges of the inner shell along the length direction.

[0026] In the preferred technical solution of the utility model, the inner shell and the outer shell are respectively plastic shells; and the rotating cover is a plastic cover.

[0027] In the preferred technical solution of the utility model, the rotating shaft is located on the midline of the wide surface of the inner shell;

[0028] The limiting block is arranged on the narrow surface of the inner shell.

[0029] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0030] 1) By setting a rotating cover, the inner wall of the rotating cover abuts the end of the rubber body to prevent the rubber body from loosening from the inner shell, so as to play a limiting role. By limiting the part of the rubber body extending out of the inner shell, the part of the rubber body extending out is small, thereby playing a good role in preventing the rubber body from being torn or broken.

[0031] 2) During preparation, the cross-sectional shape of the rubber body is matched with the cross-sectional shape of the inner shell, and the size is matched, so that the rubber body can fit tightly against the inner wall of the inner shell to prevent loosening. Thus, the rubber body of the utility model can be assembled tightly with the inner shell.

[0032] 3) The rubber body is wrapped and protected by the inner shell, so that most of the rubber body is located in the inner shell, which plays a good role in protecting the rubber body in the inner shell.

[0033] 4) The outer shell and the inner shell are assembled and used to facilitate the placement of the inner shell. The outer shell is fixed on the bottom gasket, and the outer shell is supported by the bottom gasket. Since the cross-sectional area of ​​the bottom gasket is large, it provides good support and stable placement.

[0034] 5) The adhesive layer or magnetic patch arranged on the bottom surface of the bottom gasket can firmly install the bottom gasket on the desktop.

[0035] 6) The setting of the barb structure enables the rubber body to move only in one direction along the inner shell, further ensuring the assembly tightness and assembly stability of the rubber body and the inner shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a three-dimensional structural schematic diagram of the rubber component for preventing breakage of the utility model;

[0037] Figure 2 This is a front view of the rubber component for preventing breakage of the utility model;

[0038] Figure 3 It is a three-dimensional structural schematic diagram of the assembly structure of the rubber body, inner shell and rotating cover of the utility model;

[0039] Figure 4 It is a three-dimensional structural schematic diagram of the assembly structure of the rubber body, the inner shell and the rotating cover of the utility model from another perspective;

[0040] Figure 5 The assembly structure of the rubber body, inner shell and rotating cover of the utility model (different from Figure 3 A schematic diagram of a three-dimensional structure of the rubber body (the extended length of the rubber body and the curved surface area of ​​the rubber body);

[0041] Figure 6 It is a three-dimensional structural schematic diagram of the assembly structure of the rubber body and the inner shell of the utility model;

[0042] Figure 7 It is a cross-sectional view of the assembly structure of the rubber body and the inner shell of the utility model;

[0043] Figure 8 It is a side view of the rotary cover of the utility model;

[0044] Fig. 9 It is a three-dimensional structural schematic diagram of the rotary cover of the utility model. Implementation

[0045] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0046] like Figure 1-Figure 9 An exemplary rubber component for preventing breakage of the utility model includes a rubber body 10; an inner shell 20, an outer shell 30, and a rotating cover 50;

[0047] The rubber body 10 is cylindrical, and the rubber body 10 is sleeved in the inner shell 20;

[0048] Rotating shafts 40 are formed on both sides of the top of the inner shell 20, and both sides of the rotating cover 50 are rotatably connected to the two rotating shafts 40;

[0049] The side surface of the rotating cover 50 is fan-shaped;

[0050] The inner shell 20 is movably sleeved and placed in the outer shell 30 .

[0051] In the present application, the rubber body 10 can be made of any material in the prior art, and the rubber body 10 is preferably in the shape of a square column to match the shape of the inner shell 20 of the present application. By providing a rotating cover 50, the inner wall of the rotating cover 50 abuts against the end of the rubber body 10 to prevent the rubber body 10 from loosening from the inner shell 20, thereby playing a limiting role. By limiting the portion of the rubber body 10 extending out of the inner shell 20, the portion of the rubber body 10 extending out is reduced, thereby playing a good role in preventing the rubber body 10 from being torn or broken.

[0052] In some preferred embodiments, the rotating cover 50 includes a first sector-shaped piece 51, a second sector-shaped piece 52, and an arc-shaped piece 53;

[0053] The first sector-shaped piece 51 and the second sector-shaped piece 52 are arranged in parallel.

[0054] Two sides of the arc-shaped piece 53 are respectively fixed to the first sector-shaped piece 51 and the second sector-shaped piece 52;

[0055] Through holes M are formed at the ends of the first sector-shaped piece 51 and the second sector-shaped piece 52 , respectively. The first sector-shaped piece 51 and the second sector-shaped piece 52 are movably sleeved on the rotating shaft 40 through the through holes M.

[0056] The first sector piece 51 is rotatably connected to one of the rotating shafts 40 through its through hole M, and the second sector piece 52 is rotatably connected to the other rotating shaft 40 through its through hole M. The two rotating shafts 40 are symmetrically distributed on both sides of the inner shell 20, and the first sector piece 51 and the second sector piece 52 have the same structure and shape.

[0057] Further, the corresponding arc of the first sector piece 51 is less than 90°, and the corresponding arc of the second sector piece 52 is the same as the first sector piece 51. In some further embodiments, the corresponding arc of the first sector piece 51 and the second sector piece 52 is 60°. In this embodiment, the rotating cover 50 only abuts against one side of the rubber body 10, and the middle and the other side of the rubber body 10 are exposed, so when using, the middle and the other side of the rubber body 10 exposed to the air can be used up first.

[0058] In some other preferred embodiments, the rotating cover 50 includes a first triangular piece (not shown), a second triangular piece (not shown), and a rectangular piece (not shown). Different from the previous embodiment, the inner wall of the arc-shaped piece 53 and the inner wall of the rectangular piece are arc-shaped, while the inner wall of the rectangular piece is flat, so that the contact area between the rotating cover 50 and the rubber body 10 is different.

[0059] The arc-shaped piece 53 has a better abutting effect with the rubber body 10 , and the arc-shaped piece 53 is preferred.

[0060] In some preferred embodiments, at least one side of the top of the rubber body 10 is formed with an arc surface, and one of the arc surfaces abuts against the inner wall of the arc piece 53 .

[0061] In the present application, as shown in the accompanying drawings, after the rubber body 10 is manufactured, it is first formed into a square column shape, and then cut at one edge to form an arc surface to match the inner wall shape of the rotating cover 50, so that when the rubber body 10 and the rotating cover 50 are assembled, the abutment area is larger and the abutment is more stable.

[0062] In some preferred embodiments, a barb structure 21 is formed on the side wall of the inner shell 20, and the large end of the barb structure 21 faces the end of the inner shell 20 where the rotating cover 50 is located;

[0063] The plurality of barb structures 21 are evenly distributed along the length direction of the inner shell 20 .

[0064] The barb structure 21 is provided to prevent the rubber body 10 from being loosened from the inner shell 20. The rotating cover 50 abuts and limits the rubber body 10 from one direction, the barb limits the rubber body 10 from another direction, and the inner shell 20 limits the axial rotation of the rubber body 10, so that the rubber body 10 is firmly installed and placed in the inner shell 20.

[0065] Since the barb structure 21 is provided, the rubber body 10 can be pushed from the rear end of the inner shell 20 (the end away from the rotating cover 50), so that the rubber body 10 extends out from the head end of the inner shell 20 (the end close to the rotating cover 50); and even if the rubber body 10 is pressed from the head end of the inner shell 20, the rubber body 10 cannot be brought close to the rear end of the inner shell 20.

[0066] In some preferred embodiments, limiting blocks 60 are respectively formed on both sides of one end of the inner shell 20 , and the limiting blocks 60 are used to limit the rotation stroke of the rotating cover 50 .

[0067] The two limit blocks 60 are respectively located on two sides of the inner shell 20 , and the two rotating shafts 40 are respectively located on the other two sides of the inner shell 20 .

[0068] In some preferred embodiments, a bottom gasket 70 is further included, and the bottom gasket 70 is fixed to one end of the housing 30;

[0069] Furthermore, the cross-sectional area of ​​the bottom gasket 70 is larger than the cross-sectional area of ​​the housing 30 .

[0070] The bottom gasket 70 plays a role of stability and support, and its cross-sectional area is large, so the support stability is good.

[0071] In some preferred embodiments, an adhesive layer or a magnetic patch is formed on the surface of the bottom gasket 70 facing away from the housing 30 .

[0072] The bottom gasket 70 is adhered to the desktop via an adhesive layer, or the bottom gasket 70 is magnetically attached to the desktop via a magnetic patch.

[0073] In some preferred embodiments, the rubber body 10 is in the shape of a square column, the cross section of the inner shell 20 is in a rectangular ring structure; the outer shell 30 is matched with the inner shell 20 in shape;

[0074] The inner shell 20 has four edges along the length direction formed with arc-shaped transitions respectively.

[0075] An arc transition (also called an arc chamfer of the edge) is formed so that the edge of the inner shell 20 does not cut the hand, and the edge of the inner shell 20 is smooth and convenient to hold.

[0076] Similarly, arc transitions are formed on the edges of the housing 30, so that the housing 30 is smooth and does not hurt the hand when held.

[0077] In some preferred embodiments, the inner shell 20 and the outer shell 30 are respectively plastic shells; and the rotating cover 50 is a plastic cover.

[0078] In some preferred embodiments, the rotating shaft 40 is located on the midline of the wide surface of the inner shell 20;

[0079] The limiting block 60 is arranged on the narrow surface of the inner shell 20 .

[0080] A method and principle of using a rubber component to prevent breakage in this application:

[0081] The part of the rubber body 10 that leaks out from the inner shell 20 has one side abutted by the inner wall of the rotating cover 50 and the other side exposed to the air, so that the exposed part is erased. During use, the rubber body 10 of this part is consumed and gradually becomes less; then the rotating cover 50 is rotated so that the rotating cover 50 is buckled on one side of the rubber body 10 that has become less, so that the rubber body 10 originally wrapped by the rotating cover 50 is exposed, and the rubber body 10 is used alternately in this way.

[0082] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0083] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rubber component for preventing breakage, comprising a rubber body; characterized in that: It also includes an inner shell, an outer shell, and a rotating cover; The rubber body is columnar, and is sleeved in the inner shell; Rotating shafts are formed on both sides of the top of the inner shell, and both sides of the rotating cover are rotatably connected to the two rotating shafts; The side surface of the rotating cover is fan-shaped; The inner shell is movably sleeved and placed in the outer shell.

2. The rubber component for preventing breakage according to claim 1, characterized in that: The rotating cover comprises a first sector-shaped piece, a second sector-shaped piece, and an arc-shaped piece; The first sector-shaped piece and the second sector-shaped piece are arranged in parallel, Two sides of the arc-shaped piece are respectively fixed to the first sector-shaped piece and the second sector-shaped piece; The ends of the first sector-shaped piece and the second sector-shaped piece are respectively formed with through holes, and the first sector-shaped piece and the second sector-shaped piece are respectively movably sleeved on the rotating shaft through the through holes.

3. The rubber component for preventing breakage according to claim 2, characterized in that: At least one side of the top of the rubber body is formed with an arc surface, and one of the arc surfaces abuts against the inner wall of the arc sheet.

4. The rubber component for preventing breakage according to claim 3, characterized in that: The side wall of the inner shell is formed with a barb structure, and the large end of the barb structure faces the end of the inner shell where the rotating cover is located; The plurality of barb structures are evenly distributed along the length direction of the inner shell.

5. The rubber component for preventing breakage according to any one of claims 1 to 4, characterized in that: Limit blocks are respectively formed on both sides of one end of the inner shell, and the limit blocks are used to limit the rotation stroke of the rotating cover.

6. The rubber component for preventing breakage according to claim 5, characterized in that: Also included is a bottom gasket fixed to one end of the housing; And the cross-sectional area of ​​the bottom gasket is larger than the cross-sectional area of ​​the shell.

7. The rubber component for preventing breakage according to claim 6, characterized in that: An adhesive layer or a magnetic patch is formed on the surface of the bottom gasket facing away from the shell.

8. The rubber component for preventing breakage according to any one of claims 1 to 4, characterized in that: The rubber body is in the shape of a square column, and the cross section of the inner shell is in the shape of a rectangular ring; the outer shell matches the shape of the inner shell; Arc-shaped transitions are respectively formed at four edges of the inner shell along the length direction.

9. The rubber component for preventing breakage according to claim 8, characterized in that: The inner shell and the outer shell are respectively plastic shells; the rotating cover is a plastic cover.

10. The rubber component for preventing breakage according to claim 8, characterized in that: The rotating shaft is located on the midline of the wide surface of the inner shell; The limiting block is arranged on the narrow surface of the inner shell.

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