eraser

Abstract

To provide an eraser in which a wiping section is in proper contact with a board surface.SOLUTION: An eraser for a whiteboard WB includes: a main body 1 provided with a wiping section S; and a cover 2 attached to the main body 1 and forming a gripping section for a user. A magnet 3 is arranged inside the main body 1, and the magnet 3 is supported by the cover 2 via a first cushion member A which is cushion member. With this configuration, it is possible to provide an eraser in which the wiping section S is in proper contact with a board surface m.SELECTED DRAWING: Figure 11

Description

Technical Field

[0001] The present invention relates to a laser used for boards such as whiteboards.

Background Art

[0002] Conventionally, as this type of laser, one in which a magnet (7) is disposed near a wiping body (4) is known (see, for example, Patent Document 1).

[0003] In the conventional laser, although there is an elastic repulsive force of the sponge member (3) due to repeated use and the like, only the portion of the magnet (7) supported by the iron holding member (6) protrudes excessively to the outer surface side. Therefore, in the conventional laser, unevenness is likely to occur on the outer surface of the wiping body (4), and the effect of the elastic repulsive force is reduced when a force is applied directly below the board surface, and the wiping body (4) may not contact the board surface suitably.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The present invention has been made paying attention to the above circumstances, and at least provides a laser in which the wiping part contacts the board surface suitably.

Means for Solving the Problems

[0006] That is, the present invention has the following configuration.

[0007] The invention described in claim 1 is a board eraser comprising a main body provided with a wiping section and a cover attached to the main body and constituting a gripping section for the user, wherein a magnet is disposed inside the main body and this magnet is supported by the cover via a cushioning member. The main body comprises a core material and upholstery covering the outer surface of the core material, the cushion member is made of an elastically deformable synthetic resin, the core material is made of the same material as the cushion member, the core material is provided with a hole for housing the magnet and the cushion member, and a second cushion member facing the magnet is disposed on the inner surface of the upholstery. It's an eraser.

[0009] Claim 2 The invention described is an eraser according to claim 1, wherein a plurality of the magnets are provided, and each of these plurality of magnets is supported by the cover via the cushion member.

[0010] Claim 3 The invention described herein is an eraser according to claim 1, wherein the main body is configured to be detachably attached to the cover.

[0015] Claim 4 The invention described above is an eraser according to claim 1, wherein the cover comprises a substantially rectangular top wall having a longitudinal direction and a peripheral wall extending from the peripheral edge of the top wall, the peripheral wall comprises a pair of first peripheral wall portions having a longitudinal direction, and the extension dimension of the longitudinal central portion of the first peripheral wall portion is set to be longer than the extension dimensions of the longitudinal end portions of the first peripheral wall portion.

[0016] Claim 5 The invention described herein is characterized in that the longitudinal ends are formed such that their extension dimension gradually decreases toward the outward direction. 4 This is the eraser described. [Effects of the Invention]

[0017] As described above, the present invention provides an eraser in which the wiping portion is in suitable contact with the board surface. [Brief explanation of the drawing]

[0018] [Figure 1] Perspective view showing an embodiment of the present invention. [Figure 2] Front view in the same embodiment. [Figure 3] Left side view in the same embodiment. [Figure 4] Plan view in the same embodiment. [Figure 5] X-X cross-sectional view in FIG. 4. [Figure 6] Exploded perspective view in the same embodiment. [Figure 7] Exploded perspective view in the same embodiment. [Figure 8] Exploded perspective view in the same embodiment. [Figure 9] Bottom view of the cover in the same embodiment. [Figure 10] Explanatory view showing a usage state of the same embodiment. [Figure 11] Explanatory view of the operation corresponding to FIG. 5 in the same embodiment.

Embodiments for Carrying Out the Invention

[0019] Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 11. Note that the settings of the up-down direction, front-back direction, and left-right direction in this embodiment are for convenience of explanation.

[0020] This embodiment applies the present invention to a laser for a whiteboard WB which is a board.

[0021] The laser is preferably used for a whiteboard WB configured to be able to adsorb articles such as a fastener using a magnet. That is, the laser can be fixed to the board surface m of the whiteboard WB by incorporating a magnet 3 inside to contribute to suppressing loss and enabling quick use (the erasing operation of the ink I attached to the board surface m).

[0022] The eraser comprises a main body 1 having a wiping section S which is the main contact area for wiping off ink I (which is used to display characters or diagrams on the board surface m) and a cover 2 which is attached to the main body 1 and constitutes a gripping section that is held by the user.

[0023] The eraser has a magnet 3 disposed inside the main body 1. In this embodiment, the magnet 3 is supported by the cover 2 via a first cushioning member A, which is a cushioning member.

[0024] The following describes in detail the various components of the eraser in this embodiment.

[0025] <Main body 1> The main body 1 comprises a core material 11 made of a flexible and elastic material, and a covering 12 that covers the outer surface of the core material 11. The lower surface of the main body 1 contacts the board surface m of the whiteboard WB and forms a wiping section S for wiping off ink I adhering to the board surface m. The outer surface of the wiping section S is substantially smooth.

[0026] [Core material 11] The core material 11 has an overall roughly rectangular block shape with its longitudinal side in the front-to-back direction, which is the first direction.

[0027] The core material 11 is made of an elastically deformable synthetic resin. In this embodiment, the core material 11 is made of EVA resin (ethylene-vinyl acetate copolymer resin). The core material 11 is made of a material that has the same or equivalent cushioning properties as the first and second cushion members A and B.

[0028] The core material 11 is provided with holes H into which a disc-shaped magnet 3 supported by the cover 2 and a cylindrical first cushion member A are housed. The holes H are circular in shape when viewed from above or below, and penetrate vertically. The holes H are drilled at two locations on the front and back of the core material 11, spaced at regular intervals. Each hole H is designed to house the magnet 3 supported by the cover 2 and the lower part a2 of the first cushion member A, respectively.

[0029] [Upholstery 12] The upholstery 12 is made, for example, from a synthetic fiber such as microfiber. The upholstery 12 covers at least the bottom surface of the core material 11. In this embodiment, the upholstery 12 covers the bottom surface of the core material 11, the left and right sides of the core material 11, and the left and right edges which are part of the top surface of the core material 11.

[0030] The portion of the upholstery 12 that covers the bottom surface of the core material 11 constitutes the wipeable portion S. The upholstery 12 is fixed to the outer surface of the core material 11 by an appropriate method such as adhesive.

[0031] A second cushion member B is provided on the inner surface of the upholstery 12, facing the magnet 3. The second cushion member B is fixed to the inner surface of the upholstery 12.

[0032] In this embodiment, the second cushion member B is made of EVA resin (ethylene-vinyl acetate copolymer resin). The second cushion member B is disc-shaped and is disposed within the holes H facing each of the two magnets 3.

[0033] The main unit 1 is configured to be detachable from the cover 2. In other words, the eraser is configured so that if the main unit 1 becomes dirty or deteriorated due to use, it can be replaced with another main unit 1 of the same shape.

[0034] A gripping member T is attached to the upper surface of the main body 1, which is used to detach the main body 1 from the cover 2. The gripping member T is sheet-like, and its lower end is positioned to protrude from between the rear end, which is one end in the longitudinal direction of the core material 11, and the peripheral wall Y of the cover 2, so that it can be grasped by the user.

[0035] The inner circumferential surfaces of a pair of holes H drilled in the core material 11 of the main body 1 are configured to come into contact with the outer circumferential surface of the first cushion member A supported by the cover 2. The first cushion member A, which holds the magnet 3, is arranged at two locations, front and back, with a gap between them. Therefore, since the main body 1 is supported by the cover 2 via the first cushion member A arranged at two locations with a gap between them, it does not easily detach from the cover 2.

[0036] <Cover 2> The cover 2 is attached to the main body 1 so that the wiping portion S of the main body 1 can be exposed to the outside. The cover 2 is attached to the upper part of the main body 1 so as to cover a part of the main body 1.

[0037] The cover 2 comprises a substantially rectangular top wall 21 that is longitudinal in the front-to-back direction, which is the first direction; a peripheral wall Y extending downward in a direction intersecting the first direction from the peripheral edge of the top wall 21; a plate-shaped plate-like rib r1 extending downward from the inner surface of the top wall 21; and a pair of cylindrical ribs r2 extending in a cylindrical, or substantially cylindrical, shape from the lower surface of the top wall 21 and engaging with the outer peripheral surface of the upper part a1 of the first cushion member A. The pair of cylindrical ribs r2 constitute a support part J that supports the first cushion member A.

[0038] Here, the support portion J provided on the cover 2 is composed of a part of the top wall 21 that engages with the upper part a1 of the first cushion member A and a cylindrical rib r2. The support portion J is designed to be fitted onto the upper part a1 of the first cushion member A.

[0039] The periphery wall Y comprises a pair of left and right side wall portions 22 which are longitudinal first periphery wall portions in the first direction, a front wall portion 23 connecting the front ends of the left and right side wall portions 22, and a rear wall portion 24 connecting the rear ends of the left and right side wall portions 22.

[0040] The extension dimension w of the longitudinal central portion 22a in the left and right side wall portions 22 is set to be longer than the extension dimensions of the longitudinal end portions 22b in the left and right side wall portions 22.

[0041] Furthermore, the longitudinal ends 22b of the left and right side walls 22 are formed such that their extension dimension gradually decreases towards the outward direction.

[0042] The upper surface of the main body 1 abuts against the lower edges of the plate-shaped rib r1 and the cylindrical rib r2.

[0043] <Magnet 3, First Cushioning Material A> The eraser in this embodiment has multiple magnets, specifically two magnets 3, built in to be fixed to the whiteboard WB using magnetic force, and each of the two magnets 3 is supported by the cover 2 via a first cushioning member A.

[0044] Magnet 3 has a known disc-shaped configuration. The two magnets 3 are each fixed to the lower surface of the first cushion member A, which is columnar or cylindrical, using adhesive material or the like.

[0045] The first cushion member A is made of an elastically deformable synthetic resin. In this embodiment, the first cushion member A is made of EVA resin (ethylene-vinyl acetate copolymer resin). The first cushion member A is made of the same or equivalent material as the second cushion member B and the core material 11.

[0046] The upper part a1 of the first cushion member A is fitted into the support part J provided on the cover 2. The lower part a2 of the first cushion member A and the magnet 3 attached to the lower surface of the first cushion member A are inserted into holes H provided in the core material 11.

[0047] As described above, the eraser according to this embodiment is for boards and comprises a main body 1 provided with a wiping section S and a cover 2 attached to the main body 1 that constitutes a gripping section for the user.

[0048] Two magnets 3 are arranged inside the main body 1. Each magnet 3 is supported by the cover 2 via a first cushioning member A, which is a cushioning member.

[0049] Therefore, this embodiment provides an eraser in which the wiping portion S is in suitable contact with the board surface m of the whiteboard WB.

[0050] In other words, the eraser has a magnet 3 for adhering to the board surface m, which is supported by the cover 2 via a first cushioning member A. Therefore, in this embodiment, the first cushioning member A can be flexibly compressed and bent, just like the core material 11 of the main body 1. As a result, with this embodiment of the eraser, it is less likely that the portion of the magnet 3 will protrude excessively outward from the wiping portion S, thus preventing problems that would impair the flushness of the wiping portion S.

[0051] Furthermore, as shown in Figure 11 as an example, even if a load is applied unevenly to one end of the core material 11 during use, not only the core material 11 but also the first cushion member A will be flexibly compressed and bent, so the wiping section S can make suitable contact with the board surface m without impairing its flushness.

[0052] Since the first cushioning member A is made of an elastically deformable synthetic resin, it is capable of suitably supporting the magnet 3.

[0053] Multiple magnets 3, specifically two magnets 3, are provided, and each of these two magnets 3 is supported by the cover 2 via a first cushioning member A.

[0054] Therefore, even an eraser with a long side in one direction can be adhered to the board surface m of the whiteboard WB in a balanced manner.

[0055] Furthermore, as shown in Figure 11, even if the core material 11 of the main body 1 deforms significantly and the wiping section S is tilted significantly relative to the cover 2, the first cushion members A, which are spaced apart at two locations, act as anchors, making it difficult for the main body 1 to fall off the cover 2.

[0056] Since the main unit 1 is configured to be detachable from the cover 2, maintenance and replacement of the main unit 1 can be easily performed.

[0057] Since the main body 1 comprises a core material 11 and a covering 12 that covers the outer surface of the core material 11, it has a suitable configuration that allows for the erasure of ink I attached to the board surface m.

[0058] The first cushion member A is made of an elastically deformable synthetic resin, and the core material 11 is made of the same material as the first cushion member A.

[0059] Therefore, it has a suitable configuration that makes it less likely for problems such as impairing the flushness of the wiping section S to occur.

[0060] The core material 11 is provided with a hole H through which the magnet 3 and the first cushioning member A are housed.

[0061] Therefore, the design offers excellent flexibility in ensuring the structure of the core material 11, which has superior strength, while also allowing the magnet 3 to be placed close to the wiping section S.

[0062] A second cushioning member B is placed on the inner surface of the upholstery 12, facing the magnet 3.

[0063] Therefore, the interposition of the second cushioning member B between the magnet 3 and the upholstery 12 makes it even less likely for problems such as impairing the flushness of the wiping area S to occur.

[0064] The cover 2 comprises a substantially rectangular top wall 21 that is longitudinal in the front-to-back direction, which is the first direction, and a peripheral wall Y that extends downward from the peripheral edge of the top wall 21. The peripheral wall Y comprises a pair of left and right side wall portions 22, which are the first peripheral wall portions that are longitudinal in the front-to-back direction. The extension dimension of the longitudinal central portion 22a of the left and right side wall portions 22 is set to be longer than the extension dimension of the longitudinal end portions 22b of the left and right side wall portions 22.

[0065] Therefore, the user can suitably grip the longitudinal central portion 22a of the left and right side walls 22. Furthermore, since the user is guided to grip the longitudinal central portion 22a of the left and right side walls 22, the eraser is easy for the user to grip in a balanced manner.

[0066] The longitudinal ends 22b of the left and right side walls 22 are formed such that their extension dimension gradually decreases towards the outward direction. As a result, the left and right side walls 22 can adopt a form that is aesthetically pleasing.

[0067] However, the present invention is not limited to the embodiments described in detail above.

[0068] The cushioning material can be any material capable of exhibiting a certain level of cushioning, and is not limited to those shown in the embodiments described above.

[0069] For example, the cushioning material may be a spring such as a coil spring.

[0070] The cushioning material is preferably made of an elastically deformable synthetic resin, but the specific resin material and form can be any as appropriate. For example, the cushioning material may be made of rubber or foam.

[0071] The cushioning material can, of course, be in the shape of a rectangular column.

[0072] A single magnet may be present, or there may be two or more magnets.

[0073] The main unit may not be configured to be detachable from the cover. The longitudinal ends of the pair of first circumferential wall portions may not be formed in such a way that their extension dimension gradually decreases outward.

[0074] Furthermore, the specific configuration of each part is not limited to the above embodiments, and various modifications are possible without departing from the spirit of the present invention. [Explanation of symbols]

[0075] 1…Main unit 2…cover 3…Magnets A...First cushioning material (cushioning material) B...Second cushioning material WB...Whiteboard m...board surface

Claims

1. A board eraser comprising a main body provided with a wiping section and a cover attached to the main body that constitutes a gripping section for the user, A magnet is disposed inside the main body, and this magnet is supported by the cover via a cushioning member. The aforementioned body comprises a core material and upholstery covering the outer surface of the core material. The cushioning member is made of an elastically deformable synthetic resin, The core material is made of the same material as the cushion member. The core material is provided with holes in which the magnet and cushion member are housed. An eraser in which a second cushioning member facing the magnet is disposed on the inner surface of the upholstery.

2. The eraser according to claim 1, wherein a plurality of the magnets are provided, and each of these plurality of magnets is supported by the cover via the cushion member.

3. The eraser according to claim 1, wherein the main body is configured to be detachably attached to the cover.

4. The cover comprises a substantially rectangular top wall that is longitudinal in the first direction, and a peripheral wall extending from the periphery of the top wall. The eraser according to claim 1, wherein the peripheral wall comprises a pair of first peripheral wall portions that are longitudinal in the first direction, and the extension dimension of the longitudinal central portion of the first peripheral wall portion is set to be longer than the extension dimensions of the longitudinal end portions of the first peripheral wall portion.

5. The eraser according to claim 4, wherein both longitudinal ends are formed such that the extension dimension gradually decreases toward the outward direction.

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