JP2021088098A - Tool for collecting eraser waste - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tool for collecting eraser waste which can be easily discharged to a trash can or the like by adsorbing the eraser waste which is adsorbed by a magnetic force and releasing the adsorption state. SOLUTION: A cylindrical main body 10 having an advancing / retreating space inside, a suction portion 70 covering one surface of the tubular main body 10 in the longitudinal direction, and a magnet holder that holds a magnet 33 and advances / retreats in the advancing / retreating space. A peripheral wall 34 having an elastic body 60 for urging the magnet holder 30 on the back surface side of the attracting portion 70, and an advancing / retreating lever 40 arranged outside the cylindrical main body, and standing around the magnet 33. It is characterized in that and the back surface of the suction portion 70 move forward and backward so as to be able to come into contact with each other. [Selection diagram] Fig. 2

Description

The present invention is a collection tool for collecting and disposing of an eraser generated after using an eraser using iron powder or the like by magnetically attracting it.

Conventionally, there has been a collection tool that attracts an eraser containing fine powder with a magnet.

Japanese Unexamined Patent Publication No. 2012-161926 Published Utility Model Showa 60-179497

In all prior art documents, a magnet is arranged inside a tubular body in order to collect eraser scraps after using an eraser that is attracted by a magnetic force, and the eraser scraps are attracted by the magnetic force of the magnet. In both Patent Documents 1 and 2, after the magnets are brought close to each other and attracted, the magnets are moved away to release the attracted state.

However, it is necessary to move the magnet closer to attract the magnet and then move the magnet away from the magnet to release the suction state, and it has been required to perform the operation with one click. The eraser scraps that are attracted by magnetic force may not be separated from the state of being attracted to the suction surface even if the magnet is moved away due to static electricity or the like, and in the end, the eraser scraps have often had to be manually discarded.

Therefore, it is an eraser waste collection tool that can attract the eraser waste that is attracted by magnetic force, release the suction state and discharge it to the trash box, etc., and move the magnet away from the suction part and return it with a single click, especially with a simple finger movement. There has been a demand for an eraser scrap collecting tool that can be used.

The present invention is an eraser waste collecting tool for attracting and discarding an eraser waste that is attracted by a magnetic force, and has a tubular main body having an advancing / retreating space in the longitudinal direction inside and one of the tubular main bodies in the longitudinal direction. An attracting portion that covers the direction, a magnet holding body that holds a magnet and moves forward and backward in the advancing / retreating space of the tubular body, an elastic body that urges the magnet holding body to the back surface side of the attracting portion, and the magnet holding It is characterized by having an advance / retreat lever extending from the body and arranged outside the tubular main body.

Further, the magnet holder has an accommodating portion for holding the magnet on the upper side by a peripheral wall erected around the magnet, and the surface of the peripheral wall on the suction portion side and the back surface of the suction portion can move forward and backward. It is preferable to do so.

Further, it is preferable that the suction portion has a back surface portion on the back surface at a position in contact with the peripheral wall of the magnet holder and a recessed portion for reducing the thickness at a position where the magnet held by the magnet holder is close to the suction portion.

Further, the spring, which is an elastic body, is supported at one end by the inner bottom surface of the tubular body, and the other end is supported by the inner cylinder portion extending downward from the bottom surface of the housing portion of the magnet holder. The spring constant of the spring body is preferably in the range of 0.1 N / mm to 0.2 N / mm.

Further, the advance / retreat lever is composed of a horizontal lever portion extending from the accommodating portion accommodating the magnet and a lever handle portion formed at the tip of the horizontal lever portion. It is formed on the inner surface of the cylinder of the tubular body that engages with the ridges formed on the magnet holder and the vertical opening for the horizontal lever to move up and down according to the advance and retreat of the magnet holder while leading out of the cylinder. It is preferable to have a groove.

Further, the lever handle portion has a curved portion whose apex is the tip of the horizontal lever portion and both ends reach a straight portion, and the upper plane of the curved portion is downward from the connection position with the horizontal lever portion toward the outside. It is preferable to incline to.

According to the first aspect of the present invention, the magnet of the magnet holder is urged by the elastic body to the flat portion (adsorption surface) of the suction portion, and the eraser waste can be attracted to the suction surface by this magnetic force. Then, when the eraser waste is separated from the suction surface and discarded, the user pulls the advance / retreat lever with a finger to separate the magnet from the suction surface, so that the magnetic force acting on the suction surface can be weakened.

According to the second aspect of the present invention, the peripheral wall for accommodating and holding the magnet by the elastic body can be brought into contact with and detached from the back surface of the suction surface, and when the user releases the magnet while pulling the advance / retreat lever with his / her finger. Since the holder moves vigorously to the suction surface side, it is not necessary to return the magnet holder to the suction surface side, and the peripheral wall and the back surface of the suction surface collide with each other. With this impact, the eraser scraps stuck to the suction surface due to static electricity can be thrown away, and the magnet can be moved away from the suction part and returned with a single click with a simple finger movement, making it easy to dispose of the eraser scraps. Become.

According to the third aspect of the present invention, by having the recessed portion, the magnet is prevented from being damaged due to direct contact and collision with the suction portion, and the magnetic force is easily transmitted.

According to the invention of claim 4, by setting the spring constant of the spring used as the elastic body to 0.1 N / mm to 0.2 N / mm, it is possible to repel the eraser debris stuck to the suction surface due to the impact. Not only is it possible, but the impact is so strong that even the suction surface is not blown off, enabling stable disposal of eraser scraps.

According to the fifth aspect of the present invention, the advance / retreat lever formed in the magnet holder is guided by the vertical opening of the tubular body so as not to shift to the left or right, and further, the two convex and tubular bodies of the magnet holder. Since the two concave grooves are also guided in the same manner, the three guides enable the magnet holder to move forward and backward in a stable manner.

According to the invention of claim 6, the advance / retreat lever is operated by a user's finger, and the curved portion having the center as the apex and the upper plane of the curved portion are inclined downward toward the outside. Therefore, it is possible to easily slide the operating finger. This makes it possible to easily release the pulling of the advance / retreat lever and make the magnet holder collide with the back surface of the attracting portion more easily.

It is an overall perspective view which shows an example of the eraser waste collecting tool of this invention. It is an exploded front view which shows an example of the eraser waste collecting tool of this invention. It is a perspective view which shows an example of a tubular body and an elastic body which is a part of a collection tool. It is a perspective view which shows an example of a magnet holder and a magnet which is a part of a collection tool. An example of the suction part which is a part of the collecting tool is shown, where FIG. 3A is a perspective view seen from the upper surface and FIG. 3B is a perspective view seen from the lower back surface. It shows an example of the suction part which is a part of a collection tool, and is the cross-sectional view taken along line AA of FIG. It is a perspective view which shows an example of the state which the collecting tool of this invention is attached to the pencil type eraser case.

An example of carrying out the present invention will be described with reference to the drawings. In this description, when the longitudinal direction of the collecting tool 1 is the vertical direction, the suction portion 70 (upper right in FIG. 1) is on the upper side, and the inner bottom surface 14 (lower left in FIG. 1) side of the tubular main body 10 is on the lower side. ..

As shown in FIGS. 1 and 2, the eraser waste collecting tool 1 according to the present embodiment includes a tubular main body 10, a magnet holder 30, a spring 60, and a suction portion 70. The magnet holder 30 can move forward and backward in the tubular main body 10, and is held in a state where the magnet 33 is urged toward the back surface side of the suction portion 70 by the elastic force of the spring 60. When the magnet holder 30 is pushed down, the eraser waste adsorbed on the suction unit 70 is separated and can be disposed of at the disposal site. Hereinafter, each member will be described.

As shown in FIG. 3, the tubular main body 10 is a cylindrical body having a hollow inside and a longitudinal direction in the vertical direction, and the internal space in the longitudinal direction is the advancing / retreating space 11. The tubular main body 10 has a two-stage shape via a diaphragm position 13 whose diameter is narrowed near the center in the longitudinal direction, and is composed of an upper main body 10a having a large diameter and a lower main body 10b having a small diameter.

The upper plane, which is one end surface in the longitudinal direction, is opened to form the opening surface 12a, and the lower plane, which is the other end surface in the longitudinal direction, is also opened to become the opening surface 12b. An inner bottom surface 14 for partitioning the advancing / retreating space 11 is formed immediately above the opening surface 12b below the lower main body 10b, and an inner step 13a forming a step is formed on the inner circumference of the advancing / retreating space 11 even at the aperture position 13. In the present embodiment, the inner bottom surface 14 has a circular opening formed in the central portion so that the spring or the magnet holder does not pass through, but the inner bottom surface 14 may be completely shielded. The inner stage 13a is arranged as a stopper so that the magnet holder 30 described later is not pulled down more than necessary.

The advancing / retreating space 11 of the present embodiment is formed linearly in the longitudinal direction inside the tubular main body 10. Specifically, the upper side is a space in which the opening surface 12a of the tubular main body 10 is closed by the suction portion 70 as described later (see FIG. 1), and the lower side is a space serving as an inner bottom surface 14. In the present embodiment, the accommodating portion 31 of the magnet holder 30 described later corresponds to the inner stage 13a of the tubular main body 10 and is prevented from moving downward, and when it is located at the lowest position, the inner cylinder portion 50 of the magnet holder 30 Is located in the lower body 10b of the tubular body 10.

A vertical opening 15 through which the advance / retreat lever 40 (see FIG. 2), which will be described later, passes through is formed in the upper main body 10a in the longitudinal direction. The vertical opening 15 is linearly opened with a predetermined width from the opening surface 12a to the aperture position 13, and becomes a relatively wide opening. Vertical groove-shaped concave grooves 16 and 16 are formed on the inner surface of the upper main body 10a at positions different from those of the vertical opening 15. In the present embodiment, the recessed grooves 16 and 16 are arranged on both sides when the vertical opening 15 is faced to the front. Further, an engaged piece 17 for engaging with the engaging piece 74 of the suction portion 70, which will be described later, is formed on the inner peripheral surface slightly below the opening surface 12a of the upper main body 10a.

As shown in FIG. 4, the magnet holder 30 accommodates and holds the magnet 33 upward and moves back and forth in the advance / retreat space 11 inside the tubular main body 10 (see FIG. 2), and is located at the upper part. It is composed of an accommodating portion 31 to be provided, an advancing / retreating lever 40 extending from the accommodating portion 31, and a tubular inner cylinder portion 50 protruding below the accommodating portion 31.

The accommodating portion 31 is a cylindrical member, and a peripheral wall 34 is erected from the upper surface 32, and a portion surrounded by the peripheral wall serves as a portion for accommodating and holding the magnet 33. In this embodiment, the upper plane of the peripheral wall 34 and the upper plane of the magnet 33 are flush with each other. The magnet 33 of the present embodiment has a cylindrical shape, and the peripheral wall 34 is also formed in a circular shape in accordance with the outer circumference of the magnet 33. Here, it is not necessary for the peripheral wall 34 to cover all the side surfaces of the magnet 33, and it is sufficient that the peripheral wall 34 is erected so as to be able to hold the magnet 33 and to come into contact with the back surface of the suction portion 70. In this way, the upper planes of the magnet 33 and the peripheral wall 34 are urged by the elastic force of the spring 60 to come into contact with the back surface of the suction portion 70, and can be separated by the action of the advance / retreat lever 40.

Convex lines 35, 35 are formed on both sides of the accommodating portion 31 in the front view in the longitudinal direction thereof. The ridges 35, 35 engage with the recesses 16, 16 formed in the inner wall of the tubular body 10 with the magnet holder 30 inserted in the advancing / retreating space 11 of the tubular body 10, and are positioned in the left-right direction. Guided to prevent slippage.

The advance / retreat lever 40 is extended so as to stand from the front of the accommodating portion 31. The advance / retreat lever 40 is on an inverted U shape having a horizontal lever portion 41 erected so as to project outward from the front center position of the accommodating portion 31 and an upper side formed from the tip side of the horizontal lever portion 41 as an apex. It is composed of a lever handle portion 42.

The horizontal lever portion 41 extends the lever handle portion 42 to the outside of the tubular main body 10 from the vertical opening 15 formed in the tubular main body 10. Therefore, at least the extension length of the horizontal lever portion has a length equal to or greater than the thickness from the inside to the outside of the tubular main body 10. The width direction length of the horizontal lever portion 41 is formed to be slightly shorter due to the width direction length of the vertical opening portion 15, and the horizontal lever portion 41 also functions as a guide for preventing the vertical opening portion 15 from being displaced in the left-right direction.

In the present embodiment, a horizontal lever portion 41 is formed on the front surface of the accommodating portion 31, and two ridges 35 and 35 are formed on both sides of the accommodating portion 31, respectively. Guided by 15. As a result, the magnet holding portion 30 is supported at three points in the advancing / retreating space of the tubular main body 10, and stable advancing / retreating in the left-right direction becomes possible.

The lever handle portion 42 is a U-shaped member that is turned upside down, and has a curved portion 43 that curves to both sides with a connecting portion with the horizontal lever portion 41 as an apex, and a curved portion 43 that extends downward from both ends of the curved portion 43. It consists of two straight portions 44, 44. The upper surface of the curved portion 43 is curved toward both sides, and the length from one side surface to the other side surface of the curved portion 43 reaches about two-thirds of the diameter of the upper main body 10a in front view (see FIG. 2). The upper surface of the curved portion 43 is inclined so as to be lowered from the rear side (horizontal lever portion 41 side) to the front side (lower side in FIG. 4). The lever handle portion 42 is for the user to hang a finger and push down the magnet holder 30, but the upper part is a curved portion 43 and the upper surface is inclined toward the front, which makes it easy to slide the hung finger. ing. The straight portions 44, 44 of the lever handle portion 42 hang down in parallel with the outer wall of the tubular main body 10, and a predetermined gap is formed.

A tubular inner cylinder portion 50 extending downward from the lower surface of the accommodating portion 31 of the magnet holder 30 is formed. The inner cylinder portion 50 is a tubular body having an outer diameter slightly smaller than that of the accommodating portion 31. The inner cylinder portion 50 accommodates one end of a spring 60, which is an elastic body described later (see FIG. 2).

As shown in FIGS. 2 and 3, the spring 60, which is an elastic body, uses a spring spring in the present embodiment, and one end of the spring 60 is inserted into the inner cylinder portion 50 of the magnet holder 30 and brought into contact with the lower surface of the accommodating portion 31. The other end is brought into contact with the inner bottom surface 14 of the tubular body 10. As a result, the elastic force of the spring 60 can urge the magnet holder 30 to be positioned upward in the advancing / retreating space 11 of the tubular main body 10. The elastic body may be something other than a spring, and a leaf spring or the like may be used.

As shown in FIGS. 5A and 5B, the suction portion 70 is a lid that covers (shields) the upper plane of the tubular main body 10, and has a substantially trapezoidal cross section having the same outer diameter as the tubular main body 10. It has an upper member 71. The upper member is curved downward from the vicinity of the outer peripheral edge, and the outer peripheral edge is flush with the outer peripheral surface of the tubular main body 10.

It has a protruding piece 72 that projects downward from a part of the outer peripheral edge of the upper member 71. The left-right width of the protruding piece 72 in the front view is about one-third of the diameter of the tubular main body 10, and the protruding width is about the same as the height of the upper member 71 (see FIG. 2). A projecting leg 73 that projects downward from the back surface of the upper member 71 in a substantially cylindrical shape is formed, and an engaging piece 74 that has a substantially circular shape from the lower end of the projecting leg 73 to the outside is formed. The engaging piece 74 is connected so as to cut out a part of a substantially circular shape on the base end side (circular center side) of the protruding piece 72. The projecting piece 72 engages with the upper portion of the vertical opening 15 of the tubular body 10, and the substantially circular engaging piece 74 engages with the engaged piece 17 near the opening surface 12a of the tubular body 10. , The suction portion 70 can be held in a state of being engaged with the tubular main body 10 and closed (see FIG. 3).

The details of the suction unit 70 will be described with reference to FIG. The upper member 71 of the suction portion 70 is formed with a curved portion 71a, which is a portion in which the vicinity of the outer peripheral edge is curved downward, and a flat portion 71b, which is a central portion of the curved portion 71a. The back surface of the upper member 71 is formed with a recessed portion 71c that is curved and recessed so that the center point is convex toward the upper surface. The thickness of the suction portion 70 is about the same as the thickness of the tubular main body 10, but the thickness is reduced to less than half at the center position of the upper member 71 due to the formation of the recessed portion 71c, and the magnet 33 is brought close to the suction portion 70. The eraser scraps that are magnetically attracted to the flat surface portion 71b can be more attracted, and the magnet 33 and the suction portion 70 do not come into direct contact with each other to prevent damage due to impact.

The back surface of the upper member 71 has a flat back flat portion 71d at a position inside the protruding leg 73 and outside the recessed portion 71c. The back plane portion 71d is a portion where the upper surface of the peripheral wall 34 of the accommodating portion 31 of the magnet holder 30 urged by the spring 60 is engaged. The collecting tool 1 of the present embodiment is made of resin except for the magnet 33 and the spring 60, and prevents damage caused by the direct collision between the magnet 33 and the suction portion 70.

In the collecting tool 1 of the present embodiment, the magnet 33 housed by the magnet holder 30 toward the suction portion side is urged by the spring 60 so as to be close to the back surface of the suction portion 70, so that the user can use it. Eraser scraps that are attracted by magnetic force can be attracted to the flat portion 71b of the suction portion 70 and collected. Further, when the advancing / retreating lever 40 is pulled by putting a finger on the lever handle portion 42, the magnetic force is weakened by moving the magnet 33 away from the attracting portion, and the attracted eraser waste can be released.

In addition to this, even if the magnet 33 is moved away from the suction portion 70 by operating the advance / retreat lever, the state in which the eraser scraps are attracted to the suction portion 70 may be maintained due to the influence of static electricity or the like. In the collecting tool 1 of the present embodiment, when the finger is slid from the state where the advancing / retreating lever 40 is pulled and released from the advancing / retreating lever, the magnet holder 30 vigorously contacts the back surface of the suction portion 70 due to the elastic force of the spring 60. Specifically, the upper plane of the peripheral wall 34 of the accommodating portion 31 and the back plane portion 71d of the upper member 71 come into contact with each other and collide with each other, and the impact makes it possible to release the eraser waste in the suction-maintaining state.

In order to separate the eraser scraps that have been attracted and maintained by static electricity due to the impact of the collision between the upper plane of the peripheral wall 34 and the back plane portion 71d of the suction portion, the spring spring of a better embodiment has a spring constant of 0.15 N / mm. Is used. As a result of experimenting with a plurality of spring constants, if the spring has a spring constant of 0.09 N / mm, the eraser waste adsorbed on the suction portion 70 cannot be released, and if the spring has a spring constant of 0.21 N / mm, it cannot be released. The suction part 70 is flipped off. Therefore, a suitable spring constant is 0.1 to 0.2 N / mm, more preferably 0.12 to 0.18 N / mm.

As shown in FIG. 7, the collecting tool 1 of the present embodiment can be used as a pencil-type eraser case by connecting to the rear end of the long-axis eraser case 2. The lower main body 10b of the tubular main body 10 of the collecting tool 1 is connected to the inner cylinder of the case that houses the eraser, and when the collecting tool 1 is pushed down, the lower end of the lower main body 10b is magnetically attracted to the storage portion (not shown) of the eraser 3. The eraser 3 that is pushed down and attracted by magnetic force comes out from the previous chuck. In this way, it can be used by being connected to one end of the pencil-type eraser case 2.

1 ... Collection tool, 10 ... Cylindrical body, 11 ... Advance / retreat space, 14 ... Inner bottom surface, 15 ... Vertical opening, 16 ... Recessed groove, 30 ... Magnet holder, 31 ... Storage part, 33 ... Magnet, 34 ... Peripheral wall , 35 ... Convex, 40 ... Advance / retreat lever, 41 ... Horizontal lever part, 42 ... Lever handle part, 43 ... Curved part, 44 ... Straight part, 50 ... Inner cylinder part, 60 ... Spring spring (elastic body), 70 ... Adsorption part, 71c ... recessed part, 71d ... back flat part.

Claims (6)

An eraser waste collection tool for adsorbing and disposing of eraser waste that is attracted by magnetic force.
A tubular body having an advancing / retreating space in the longitudinal direction inside, a suction portion that covers one surface of the tubular body in the longitudinal direction, and a magnet holder that holds a magnet and advances / retreats in the advancing / retreating space of the tubular body. An eraser having an elastic body that urges the magnet holder to the back surface side of the suction portion, and an advance / retreat lever that extends from the magnet holder and is arranged outside the tubular body. Waste collection tool. The magnet holder has an accommodating portion for holding the magnet on the upper side by a peripheral wall standing around the magnet, and the surface of the peripheral wall on the suction portion side and the back surface of the suction portion can move forward and backward so as to be detachable. The eraser waste collecting tool according to claim 1. A claim characterized by having a back surface portion on the back surface at a position in contact with the peripheral wall of the magnet holder, and a recessed portion for reducing the thickness at a position where the magnet held by the magnet holder is close to the attracting portion. Item 2. The eraser waste collecting tool according to item 2. The spring, which is an elastic body, has one end supported by the inner bottom surface of the tubular body and the other end supported by the inner cylinder portion extending downward from the bottom surface of the housing portion of the magnet holder.
The eraser waste collecting tool according to any one of claims 1, 2 or 3, wherein the spring constant of the spring body is in the range of 0.1 N / mm to 0.2 N / mm. The advancing / retreating lever consists of a horizontal lever portion extending from the accommodating portion accommodating the magnet and a lever handle portion formed at the tip of the horizontal lever portion.
The tubular body has a vertical opening for leading the horizontal lever portion from the inside of the cylinder to the outside of the cylinder and for the horizontal lever to move up and down according to the advancement and retreat of the magnet holding portion, and a ridge formed on the magnet holding body. The eraser waste collecting tool according to any one of claims 1, 2, 3 or 4, further comprising a concave groove formed on the inner surface of the tubular body to be engaged. The lever handle portion has a curved portion with the tip of the horizontal lever portion as the apex and both ends reaching the straight portion.
The eraser waste collecting tool according to claim 5, wherein the upper plane of the curved portion is inclined downward from the connection position with the horizontal lever portion.

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