Patent Application
20170209978
1. Field of the Invention
The present disclosure relates to an eraser device, more particularly to an eraser wheel assembly structure.
2. Description of the Related Art
Please refer to
The eraser wheel 91 is assembled into the groove part 921 of the shell cover 92 by placing the side on which the protruding pins 912 are disposed, and inserting the protruding pins 912 through the through holes 923 and making the blocking parts 913 be blocked at step parts 924. After assembly, the peripheral edge 914 of the eraser wheel 91 is tightly attached with the inner surface 925 of the annular wall 922, the eraser wheel 91 can be driven to rotate by the plurality of protruding pins 912 inserted in the through-holes 923 during rotation of the shell cover 92 driven by the grinding tool, so as to grind and remove the glue.
The eraser wheel 91 is made from flexible material and has a hardness falling within a score range of 50 to 60 in Shore hardness Type A for facilitating to remove the glue, However, while the eraser wheel 91 is being rotated to remove glue, the part of the eraser wheel 91 tightly attached with the position being removed glue is pressed and deformed to be flatter in an axial direction and wider in a radial direction. Particularly, as shown in
Please refer to
In order to solve aforesaid problems, a primary objective of the present disclosure is to provide an eraser wheel assembly structure to combine with a tool, the structure can prevent the eraser wheel from being escaped from the shell cover without reducing the glue-removing effect, so as to ensure the stable positioning effect between the eraser wheel and the shell cover during rotation for removing glue.
The eraser wheel assembly structure includes a shell cover, an eraser wheel body and a fastener.
The shell cover has a bottom board and a blocking wall annularly projected on a peripheral of the bottom board. The eraser wheel body is made from flexible material and configured to be driven by a driving head to rotate for removing glue. The eraser wheel body has a disc-shaped base with a peripheral edge which is continuous and unbroken. The disc-shaped base is attached with the bottom board by a first surface thereof facing the bottom board, and assembled inside the blocking wall, and has a second surface opposite to the first surface, and has a plurality of glue removing blocks which each is long-bar-shaped and curvy. The eraser wheel body has an axle hole located at a central part thereof and cut therethrough, and a pressing part disposed around the axle hole which has a plurality of positioning holes thereon. The bottom board has a plurality of positioning studs configured to insert into the positioning holes correspondingly, and the blocking wall is located at the outside of the peripheral edge of the disc-shaped base and faces the peripheral edge radially. A gap exists between the blocking wall and the peripheral edge to tolerate radial extension of the disc-shaped bas during operation. The plurality of glue removing blocks are located between the pressing part and the peripheral edge and in a spiral arrangement on the second surface, and a pitch between any two glue removing blocks adjacent to each other has a width gradually enlarged from a side thereof near the pressing part to the peripheral edge. The fastener is configured to fasten the eraser wheel with the driving head and has a plate with a width larger than that of the axle hole, and has a first connecting part at a side thereof. The driving head has a pivot holder having a second connecting part, and the first connecting part is configured to insert through the axle hole to connect and fasten with the second connecting part. The fastener has a step part located between the plate and the first connecting part and having a diameter ranged between diameters of the plate and the first connecting part, and the step part has a first press surface opposite to the plate. The pivot holder has a second press surface corresponding to the first press surface. When the first connecting part and the second connecting part are connected and fastened with each other, the two sides of the bottom board are sandwiched between the first press surface and the second press surface and the plate is abutted against the pressing part. The bottom board has a groove formed on the side thereof abutted against the second press surface, and a blocking part formed inside the groove, and a washer with a thick smaller than a depth of the groove is disposed in the groove and constrained by the blocking part. When the bottom board is sandwiched, the washer is abutted against the second press surface.
Preferably, the gap has a width ranged from 1 mm to 3 mm.
Preferably, the first connecting part is an outer thread part and the second connecting part is an inner thread part configured to screw and lock with the first connecting part.
The detailed structure, operating principle and effects of the present disclosure will now be described in more details hereinafter with reference to the accompanying drawings that show various embodiments of the present disclosure as follows.
Reference will now be made in detail to the exemplary embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings. Therefore, it is to be understood that the foregoing is illustrative of exemplary embodiments and is not to be construed as limited to the specific embodiments disclosed, and that modifications to the disclosed exemplary embodiments, as well as other exemplary embodiments, are intended to be included within the scope of the appended claims. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the inventive concept to those skilled in the art. The relative proportions and ratios of elements in the drawings may be exaggerated or diminished in size for the sake of clarity and convenience in the drawings, and such arbitrary proportions are only illustrative and not limiting in any way. The same reference numbers are used in the drawings and the description to refer to the same or like parts.
It will be understood that, although the terms ‘first’, ‘second’, ‘third’, etc., may be used herein to describe various elements, these elements should not be limited by these terms. The terms are used only for the purpose of distinguishing one component from another component. Thus, a first element discussed below could be termed a second element without departing from the teachings of embodiments. As used herein, the term “or” includes any and all combinations of one or more of the associated listed items.
Please refer to
In present embodiment, an eraser wheel assembly structure to combine with a tool is provided. As shown in
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The fastener 4 has a step part 43 located between the plate 41 and the first connecting part 42. The step part 43 has a diameter ranged between diameters of the plate 41 and the first connecting part 42, and has a first press surface 431 which is opposite to the plate 41. In present embodiment, the first connecting part 42 is an outer thread part and the second connecting part 32 is an inner thread part, so that the first connecting part 42 and the second connecting part 32 can be locked by a screwing manner.
As shown in
In present embodiment, when the eraser wheel body 2 is driven by the driving head 31 to rotate for removing glue, if the disc-shaped base 21 is deformed to be flatter in an axial direction and wider in a radial direction subject to the pressure caused by the glue removing blocks 24 being tightly attached on the place being removed glue, the radial extension of the disc-shaped base 21 under the axial pressure (as shown in
According to above-mentioned description, obviously the present disclosure has following advantage. Compared with the assembly of the conventional eraser wheel and the shell cover, the present disclosure provides the gap A existing between the blocking wall 12 of the shell cover 1 and the peripheral edge 211 of the disc-shaped base 21, and the gap A is served as a tolerable space for the radial extension of the disc-shaped base 21 under the axial pressure, so as to completely solve the problem that the peripheral edge of the conventional eraser wheel is squeezed out of the annular wall while the eraser wheel is axially extended under the axial pressure. Therefore, unlike the conventional eraser wheel 93, the present disclosure can prevent the eraser wheel body 2 from being escaped from the shell cover 1 without the plurality of glue removing blocks 932 and 933 arranged in interval and disposed in the inside-outside staggered arrangement, and further ensure the stable positioning effect between the shell cover 1 and the eraser wheel body 2 during rotation for removing glue.
The above-mentioned descriptions represent merely the exemplary embodiment of the present disclosure, without any intention to limit the scope of the present disclosure thereto. Various equivalent changes, alternations or modifications based on the claims of present disclosure are all consequently viewed as being embraced by the scope of the present disclosure.
