Eraser case

Abstract

The present application provides a rubber eraser box. The rubber eraser box is a small rubber eraser box easy to be stored in a pencil box, and has the functions of adsorbing and collecting rubber eraser crumbs. The rubber eraser box has a box body part (1) for mounting a rubber eraser (7) containing powder capable of being adsorbed by magnetic force, and a rubber eraser crumb adsorbing and collecting part (2) arranged below the box body part (1). The rubber eraser crumb adsorbing and collecting part (2) has an adsorbing part (4) in which a magnet (3) is arranged, and by which the rubber eraser crumbs (71) are adsorbed to an adsorbing surface (41); a collecting cap (5) for collecting the rubber eraser crumbs (71); and a magnet holding part (6) for making the magnet (3) approach or move away from the back surface of the adsorbing surface (41) of the adsorbing part (4) in connection with the action of mounting or dismounting the collecting cap (5) relative to the adsorbing part (4).

Description

Technical Field

[0001] This invention relates to an eraser box with an adsorption and collection function for eraser shavings. Background Technology

[0002] Previously, a proposal included an eraser shavings collection device in which, for the purpose of adsorbing and collecting eraser shavings, the erasers made of plastic resin or rubber contained iron powder and magnetic powder, and the eraser shavings were adsorbed and collected by magnets.

[0003] For example, there are eraser shavings adsorbers integrally formed with eraser cartridges and eraser shavings collection devices that have the function of collecting eraser shavings by causing them to fall off the adsorption surface at the bottom of the eraser (see Patent Documents 1-3).

[0004] Patent Document 1: Japanese Patent Application Publication No. 9-142089

[0005] Patent Document 2: Japanese Utility Model Application Publication No. 60-176767

[0006] Patent Document 3: Japanese Published Patent No. 2-22316 Summary of the Invention

[0007] The problem the invention aims to solve

[0008] However, the aforementioned eraser shavings collector and eraser box are integrated. Because the eraser shavings collector has a storage opening and drawer for collecting eraser shavings, the eraser box itself becomes large, making it difficult to handle when used as an eraser (especially according to Patent Document 1). Figure 2 (See Embodiments 1 and 7 in Figures 12 and 13). Furthermore, the eraser shavings disposal devices in Patent Documents 2 and 3, which are stored separately from the erasers in a pencil case, are inconvenient and take up space when carried.

[0009] Therefore, the purpose of this invention is to provide a small eraser box that is easy to store in a pencil case and has the function of adsorbing and collecting eraser shavings.

[0010] Solution for solving the problem

[0011] In view of the above-mentioned problems, the present invention provides an eraser box, characterized in that the eraser box comprises: a main body for holding an eraser containing powder that can be magnetically attracted; and an eraser shavings collection and adsorption unit disposed below the main body.

[0012] The eraser shavings adsorption and collection unit includes: an adsorption unit in which a magnet is provided, and eraser shavings are adsorbed onto an adsorption surface through the adsorption unit; a collection cap for collecting eraser shavings; and a magnet holding unit that, in conjunction with the action of attaching or detaching the collection cap relative to the adsorption unit, moves the magnet closer to and further away from the back side of the adsorption surface.

[0013] Furthermore, preferably, based on the above structure, the adsorption part is formed as a downward convex shape from the main body of the box, and has: a magnet, which is disposed within the adsorption part in a manner that allows it to move freely in the vertical direction using a magnet holding part; and an adsorption surface, which adsorbs eraser shavings below the adsorption surface.

[0014] The adsorption surface has: a flat portion, which is formed by making a planar shape near the center directly below the end face of the magnet; and an inclined portion, which is formed by tilting the portion closer to the front and back sides than the flat portion upwards.

[0015] Furthermore, it is preferable that, based on the above structure, the adsorption surface has a thin-walled portion in the part opposite to the end face of the magnet disposed in the adsorption part.

[0016] Furthermore, preferably, based on the above structure, the magnet holding part has: an insertion recess into which the magnet is inserted in a manner that is longer in the vertical direction; and an operating part that extends from both sides of the insertion recess in the horizontal direction and is disposed on both sides of the adsorption part.

[0017] Furthermore, preferably, based on the above structure, the operating part has an engaging part that engages with the engaging part formed on the inner side of the collecting cap.

[0018] The effects of the invention

[0019] Therefore, according to the present invention described above, a small eraser box can be provided that can be collected by adsorbing eraser shavings onto the adsorption surface of the adsorption part in conjunction with the operation of attaching and detaching the collection cap relative to the adsorption part, and by causing the adsorbed eraser shavings to fall into the collection cap. Attached Figure Description

[0020] Figure 1 This is an exploded perspective view showing an example of an eraser box according to an embodiment of the present invention.

[0021] Figure 2 From and Figure 1 A three-dimensional view of the state where the collection cap of the eraser box is removed and the adsorption part is exposed, viewed from different directions.

[0022] Figure 3 It means to Figure 2The image shows the periphery of the magnet holding part of the eraser cartridge, where the magnet is pulled downwards and pressed against the back of the magnet adsorption surface. Figure 3 (a) is a cross-sectional view of A-A. Figure 3 (b) is a B-B sectional view.

[0023] Figure 4 It means to Figure 2 The image shows the state in which the magnet holding part of the eraser cartridge is pushed upwards, causing the magnet to leave the back of the adsorption surface. Figure 4 (a) is a cross-sectional view of A-A. Figure 4 (b) is a B-B sectional view.

[0024] Figure 5 This means that the eraser shavings are adsorbed onto... Figure 2 A diagram showing the state of the adsorption surface of the adsorption section of the eraser cartridge. Figure 5 (a) is a cross-sectional view of A-A. Figure 5 (b) is a B-B sectional view.

[0025] Figure 6 This indicates installation. Figure 2 The image shows the eraser box with its collection cap, allowing eraser shavings to fall into the collection cap. Figure 6 (a) is a cross-sectional view of A-A. Figure 6 (b) is a B-B sectional view.

[0026] Explanation of reference numerals in the attached figures

[0027] 1. Box body; 11. Insertion part; 12. Grip part; 13. Concave-convex surface; 14. Eraser cap; 15. Recess; 2. Eraser shavings adsorption and collection part; 3. Magnet; 31. End face; 4. Adsorption part; 41. Adsorption surface; 42. Flat part; 43. Thin-walled part; 44. Inclined part; 45. Engaging part; 46. Groove; 5. Collection cap; 51. Opening part; 52. Engaged part; 6. Magnet holding part; 61. Insertion recess; 62. Operating part; 63. Raised part; 64. Engaging part; 7. Eraser; 71. Eraser shavings. Detailed Implementation

[0028] based on Figures 1-6 Here is a detailed description of one embodiment of the present invention. Furthermore, the eraser 7 installed in the eraser box of this embodiment is a rectangular plastic or rubber eraser containing iron powder or other powder that can be magnetically attracted.

[0029] (Implementation Method)

[0030] like Figures 1-4As shown, the eraser box of this embodiment includes: a box body 1, which houses an eraser 7 containing powder that can be attracted by magnetic force; and an eraser shavings adsorption and collection part 2, which is located below the box body 1. The eraser shavings adsorption and collection part 2 includes: an adsorption part 4, in which a magnet 3 is provided, and eraser shavings 71 are adsorbed onto an adsorption surface 41 by the adsorption part 4; a collection cap 5, which is used to collect eraser shavings 71; and a magnet holding part 6, which, in conjunction with the operation of attaching and detaching the collection cap 5 relative to the adsorption part 4, moves the magnet 3 closer to and further away from the back side of the adsorption surface 41 of the adsorption part 4.

[0031] The main body 1 of the box has an insertion part 11 for inserting and fitting an eraser 7, an eraser cap 14 covering the eraser 7, and a gripping part 12, 12 for the user to hold. The insertion part 11 has an opening at the top in a generally square shape and has a depth that allows at least one end of the eraser 7 to be inserted.

[0032] The surfaces of the gripping portions 12, 12 have concave and convex surfaces 13 to facilitate gripping by the user. For example, when removing the eraser cap 14 from the main body 1 of the box, the concave and convex surfaces 13 of the gripping portions 12, 12 in the front-to-back direction, which are easy for the user to grip, are provided as multiple recessed grooves, while the concave and convex surfaces 13 of the gripping portions 12, 12 in the left-to-right direction are provided as multiple protruding convex grooves. These are different in shape from the gripping portions 12, 12 in the front-to-back direction, making them easy to distinguish.

[0033] The eraser cap 14 is formed as an upwardly convex cylindrical body with an opening at the bottom. Around the opening, there are recesses 15, 15 that curve along the outer shape of the gripping portions 12, 12 in a manner that does not interfere with the gripping portions 12, 12 of the main body 1, as described later. Furthermore, the eraser cap 14 is preferably formed from a translucent material to facilitate easy observation of the degree of reduction of the eraser 7 and the sides of the eraser 7.

[0034] The adsorption part 4 is formed as a downward protrusion from the main body 1 of the box, and has: a magnet 3, which is disposed within the adsorption part 4 in a manner that allows it to move freely in the vertical direction using the magnet holding part 6; and an adsorption surface 41, which adsorbs the eraser shavings 71 below the adsorption surface 41. The adsorption part 4 has: engaging parts 45, 45, which protrude from the outer surfaces of the front and back sides of the adsorption part 4 and can engage with the engaging parts 52, 52 of the collection cap 5; and vertical grooves 46, 46, which are provided on both sides of the adsorption part 4 for allowing the operating parts 62, 62 of the magnet holding part 6 to move freely in the vertical direction.

[0035] The magnet 3 is a long rectangular parallelepiped shape, shorter in the front-to-back direction and longer in the vertical and horizontal directions. The N and S poles, which are the two end faces of the magnet 3, are arranged separately in the vertical direction, thereby enabling a stronger attraction force. For example, neodymium magnets, which have strong magnetic force, are preferably used for the magnet 3.

[0036] The adsorption surface 41 has the following features to facilitate the collection of eraser shavings 71 near the center: a flat portion 42 formed by making the area near the center directly below the end face 31 of the magnet 3 flat; and inclined portions 44, 44 formed by tilting the portions of the flat portion 42 that are closer to the front and back sides upwards. Furthermore, the inclined portions 44, 44 can also be formed as curved surfaces with rounded corners.

[0037] In addition, the adsorption surface 41 has a thin-walled portion 43 with a horizontal groove formed in the left-right direction at the center of the back side opposite to the end face 31 of the magnet 3 provided in the adsorption part 4. As a result, the magnetic flux density of the magnet 3 increases near the center of the flat part 42, so that the eraser shavings 71 are not adsorbed on the entire adsorption surface 41 as much as possible, but are adsorbed locally and concentrated on the thin-walled portion 43 in the center of the flat part 42.

[0038] The collection cap 5 is a cylindrical body with a bottom, which is larger than the entire adsorption part 4 and has a depth sufficient to maintain a predetermined distance from the adsorption surface 41 of the adsorption part 4. It is convex downwards and has an opening 51 on the upper side of the main body 1. In addition, the collection cap 5 is preferably formed of a light-transmitting material to facilitate easy inspection of the collection of eraser shavings 71 inside.

[0039] The periphery of the opening 51 of the collecting cap 5 has a thickness that abuts against the entire lower surface of the protrusion of the ridge portion 63 of the operation portion 62, which will be described later. Furthermore, the inner side near the upper edge of the opening 51 has concave engaging portions 52, 52 that engage with engaging portions 45, 45 of the adsorption portion 4 and engaging portions 64, 64 of the operation portions 62, 62.

[0040] In particular, such as Figure 3 , Figure 4 As shown, the magnet holding part 6 has: an insertion recess 61, which is concave, and the magnet 3 is inserted into the insertion recess 61 with a longer length in the vertical direction, thereby holding the magnet 3 with the magnet exposed downward in the adsorption part 4; and an operation part 62, which extends from both sides of the insertion recess 61 in the horizontal direction and is disposed on both sides of the adsorption part 4.

[0041] The operating part 62 has: a plurality of protruding parts 63 located on the surface of the operating part 62, which are arranged to slide in contact with the grooves 46, 46 in the vertical direction on both sides of the adsorption part 4; and a locking part 64 protruding from the lower end of the operating part 62 on the side in the horizontal direction, which can lock with the locking part 52 on the inner side of the collecting cap 5.

[0042] Next, based on Figure 5 , Figure 6 This describes a method of using the eraser box described above, in conjunction with the action of attaching (installing or removing) the collection cap 5 relative to the adsorption part 4, to adsorb eraser shavings 71 onto the adsorption surface 41 of the adsorption part 4, and then collecting the eraser shavings 71 inside the collection cap 5.

[0043] When removing the collection cap 5 from its position on the adsorption unit 4, while maintaining the engaged state of the locking portions 52, 52 of the collection cap 5 and the locking portion 64 of the operating unit 62, the magnet holding portion 6 is pulled downwards, causing the magnet 3 inside the adsorption unit 4 to come into contact with the back of the adsorption surface 41. Then, by pulling the collection cap 5 further downwards, the engagement between the locking portions 52, 52 of the collection cap 5 and the locking portion 64 of the operating unit 62 is released, thus completing the removal.

[0044] At this time, as Figure 5 As shown, in conjunction with the action of removing the collection cap 5 from the self-adsorption part 4, the magnet holding part 6 moves downward, and the magnet 3 inside the adsorption part 4 comes into contact with the back side of the thin-walled part 43 of the adsorption surface 41. As a result, near the lower part of the thin-walled part 43 of the adsorption surface 41, the magnetic flux density of the magnet 3 becomes maximum and the magnetic force is enhanced, and the eraser shavings 71 are locally concentrated and adsorbed on the flat part 42 of the adsorption surface 41, especially in the area around the thin-walled part 43 of the adsorption surface 41.

[0045] Furthermore, when disassembling the collection cap 5, if the engagement between the locking parts 52, 52 of the collection cap 5 and the locking part 64 of the operating part 62 is released midway through pulling down the magnet holding part 6, the user can assist by pinching the operating parts 62, 62 of the magnet holding part 6 located on both sides of the adsorption part 4 from the left and right directions and pulling them down.

[0046] Furthermore, when the collecting cap 5 is inserted and installed onto the adsorption part 4 from bottom to top, while maintaining the engagement state between the inner side of the opening 51 of the collecting cap 5 and the engagement state between the operating parts 62, 62 of the magnet holding part 6 and the lower surface of the protrusions 63 of the operating parts 62, 62 abuts against the periphery of the opening 51 of the collecting cap 5, the collecting cap 5 is further pushed upwards, and the engagement parts 45, 45 of the adsorption part 4 engage with the engagement parts 52, 52 of the collecting cap 5, thus completing the installation of the collecting cap 5 relative to the adsorption part 4.

[0047] At this time, as Figure 6 As shown, in conjunction with the action of attaching the collection cap 5 to the adsorption section 4, the magnet holding section 6 moves upward, thereby separating the end face 31 of the magnet 3 from the back side of the adsorption surface 41 (especially the area around the thin-walled portion 43 of the adsorption surface 41). As a result, near the area below the thin-walled portion 43 of the adsorption surface 41, the magnetic flux density decreases and the magnetic force weakens, causing the adsorbed eraser shavings 71 to fall into the collection cap 5 and be collected.

[0048] Therefore, based on the above structure, a small eraser box can be provided. Instead of directly operating the operation parts 62, 62 of the magnet holding part 6, the magnet 3 is brought closer to and further away from the back side of the adsorption surface 41 of the adsorption part 4 by the operation of attaching and removing the collection cap 5 relative to the adsorption part 4, so that the eraser shavings 71 are adsorbed onto the adsorption part 4 and the eraser shavings 71 fall into the collection cap 5 for collection.

[0049] In addition, the adsorption part 4 of the eraser box can position the end face 31 with the largest magnetic flux density of the magnet 3 near the thin wall part 43 of the adsorption surface 41, so that the eraser shavings 71 can be efficiently concentrated and adsorbed on the thin wall part 43 of the adsorption surface 41.

[0050] Furthermore, since almost no eraser shavings 71 are adsorbed in the area outside the thin-walled portion 43 of the adsorption surface 41, the insertion of the collection cap 5 will not be hindered by the eraser shavings 71 when the eraser shavings 71 are adsorbed on the adsorption surface 41, and the collection cap 5 can be installed on the adsorption portion 4 in this state.

[0051] The above embodiments illustrate preferred embodiments of the present invention, but the present invention is not limited to the above embodiments. Improvements and modifications can be made within the scope of the claims. For example, when the eraser 7 is a cylindrical eraser, appropriate modifications can be made to match the shape of the eraser, such as changing the insertion portion 11 of the box body 1 to a circle to match the shape of the eraser.

Claims

1. An eraser box, characterized in that, The eraser box includes: a main body for holding erasers containing powder that can be attracted by magnetism; and an eraser shavings collection section located below the main body. The eraser shavings adsorption and collection unit includes: an adsorption section, in which a magnet is disposed, and eraser shavings are adsorbed onto an adsorption surface by means of the adsorption section; a collection cap for collecting eraser shavings; and a magnet holding section, which, in conjunction with the action of attaching and detaching the collection cap relative to the adsorption section, causes the magnet to move closer to and further away from the back side of the adsorption surface. The adsorption section is formed in a convex shape extending downwards from the main body of the box, and includes: a magnet disposed within the adsorption section such that it can move freely in the vertical direction using the magnet holding section; and an adsorption surface that adsorbs eraser shavings below the adsorption surface. The adsorption surface has: a flat portion, which is formed by making a planar shape near the center directly below the end face of the magnet; and an inclined portion, which is formed by tilting the portion closer to the front and back sides than the flat portion upwards.

2. The eraser box according to claim 1, characterized in that, The adsorption surface has a thin-walled portion in the part opposite to the end face of the magnet disposed in the adsorption part.

3. The eraser box according to claim 1, characterized in that, The magnet holding part has: an insertion recess into which the magnet is inserted in a manner that is longer in the vertical direction; and an operating part that extends from both sides of the insertion recess in the horizontal direction and is disposed on both sides of the adsorption part.

4. The eraser box according to claim 3, characterized in that, The operating part has an engaging portion that engages with an engaging portion formed on the inner side of the collecting cap.

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