Mechanical pencil lead case

Abstract

To provide a refill case for a mechanical pencil capable of more reliably maintaining a state where a refill take-out port is closed.SOLUTION: A mechanical pencil refill case includes a case main body for housing a mechanical pencil refill, a cover member capable of opening and closing a refill take-out port of the case main body by being slid with respect to the case main body, and a lock member configured to switch between an engaged state in which the lock member is engaged with one of the case main body and the cover member and a disengaged state in which the lock member is not engaged with the one of the case main body and the cover member by moving with respect to the case main body and the cover member in an intersecting direction intersecting a sliding direction of the cover member with respect to the case main body. In the engaged state, the cover member is configured to be maintained in a state of closing the refill core take-out port and in a state of being non-slidable with respect to the case main body.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present disclosure relates to a lead refill case for a mechanical pencil. [Background technology]

[0002] Conventionally, a known refill lead case for mechanical pencils has a connecting portion formed at the bottom of the case body that allows the case body and cover member to rotate relatively in a fan shape, acting as a pivot point, and when the refill lead removal opening of the case body is open, the end of the refill lead for mechanical pencils is exposed to the outside, allowing the refill lead for mechanical pencils to be removed from there (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2020-157539 Summary of the Invention [Problem to be solved by the invention]

[0004] In the device disclosed in Patent Document 1, the case body and the cover member are rotated relative to each other in a fan shape with one hand, so that the refill lead removal opening of the case body is open and the end of the mechanical pencil refill is exposed.The mechanical pencil refill is then removed by hand and refilled with the mechanical pencil refill. Next, after refilling the mechanical pencil with mechanical pencil refills, the case body and the cover member are again rotated in a fan shape relative to each other, causing the cover member to close the refill lead opening of the case body. At this time, a protrusion is formed on one of the cover member and the case body, and a fitting portion for this protrusion is formed on the other, so that the cover member maintains the refill lead opening closed. However, when the cover member is engaged with the case body in this way by fitting the protrusion and the fitting portion, it can be difficult to reliably maintain the refill lead opening closed by the cover member.

[0005] In view of the above circumstances, at least one embodiment of the present invention aims to provide a lead refill case for a mechanical pencil that can more reliably keep the lead removal opening closed. [Means for solving the problem]

[0006] At least one embodiment of the present invention relates to a mechanical pencil refill case. A case body for storing replacement leads for mechanical pencils; a cover member that can open and close a refill outlet of the case body by sliding it relative to the case body; a locking member configured to switch between an engaged state in which the locking member is engaged with one of the case body or the cover member and a disengaged state in which the locking member is not engaged with the one of the case body or the cover member by moving relative to the case body and the cover member in a direction intersecting a sliding direction of the cover member relative to the case body; Equipped with In the engaged state, the cover member is configured to be maintained in a state in which it closes the refill lead removal opening and is unable to slide relative to the case body. [Effects of the Invention]

[0007] According to at least one embodiment of the present invention, a lead refill case for a mechanical pencil is provided that can more reliably keep the lead removal opening closed. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a front view showing a state in which a locking member of a mechanical pencil refill case according to one embodiment is in an engaged state. FIG. [Figure 2] FIG. 2 is a front view showing a state in which the locking member of the mechanical pencil refill case according to the embodiment is in a disengaged state. [Figure 3] FIG. 2 is a front view showing a state in which the locking member of the mechanical pencil refill case according to the embodiment is in a disengaged state. [Figure 4] 1 is an exploded perspective view of a lead refill case for a mechanical pencil according to an embodiment of the present invention, seen from the front side. [Figure 5] 1 is an exploded perspective view of a mechanical pencil lead refill case according to an embodiment of the present invention, seen from the rear side. FIG. [Figure 6] 6 is a perspective view of the lead refill case for mechanical pencils shown in FIGS. 4 and 5, showing a state in which a locking member is in an engaged state. FIG. [Figure 7] FIG. 7 is a cross-sectional view of the lead refill case for mechanical pencils shown in FIG. 6. [Figure 8] 6 is a perspective view of the lead refill case for mechanical pencils shown in FIGS. 4 and 5, showing a state in which a locking member is in a disengaged state. FIG. [Figure 9] FIG. 9 is a cross-sectional view of the lead refill case for mechanical pencils shown in FIG. 8. [Figure 10] 6 is a perspective view of the lead refill case for mechanical pencils shown in FIGS. 4 and 5, showing a state in which a locking member is in a disengaged state. FIG. [Figure 11] 11 is a cross-sectional view of the lead refill case for mechanical pencils shown in FIG. 10. FIG. [Figure 12] 8 is a cross-sectional view along the line AA of FIG. 7 showing a state in which a plurality of refills are housed. [Figure 13] 11 is a perspective view similar to FIG. 10, showing a refill case in which a plurality of refills are stored. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, several embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of components described as embodiments or shown in the drawings are merely illustrative examples and are not intended to limit the scope of the present invention.

[0010] Figures 1 to 3 are front views of a mechanical pencil refill case according to one embodiment, showing the state when the locking member is engaged, the state when the locking member is disengaged and the refill lead outlet is closed, and the state when the locking member is disengaged and the refill lead outlet is open, respectively.

[0011] Figures 4 and 5 are exploded perspective views from the front and back, respectively, of one embodiment of a mechanical pencil refill case. Figures 6, 8, and 10 are perspective views of the mechanical pencil refill case shown in Figures 4 and 5, showing the state when the locking member is engaged, the state when the locking member is disengaged and the refill lead outlet is closed, and the state when the locking member is disengaged and the refill lead outlet is open, respectively. Figures 7, 9, and 11 are cross-sectional views of the mechanical pencil refill case shown in Figures 6, 8, and 10, respectively. Figure 12 is a cross-sectional view taken along line AA in Figure 7. Figure 13 is a perspective view similar to Figure 10, showing the refill lead case with multiple refill leads stored therein.

[0012] As shown in FIGS. 1 to 13, a lead refill case for a mechanical pencil (hereinafter also referred to as a lead refill case) 1 according to some embodiments includes a case body 2, a cover member 4, and a lock member 5.

[0013] The case body 2 is configured to be able to accommodate a refill lead 3 for a mechanical pencil (see FIGS. 3 to 5, etc.). The case body 2 has a refill lead removal opening 2a, which is an opening for inserting and removing the refill lead 3, and a bottom 2c, and extends between the refill lead removal opening 2a and the bottom 2c. In the illustrated exemplary embodiment, the case body 2 extends between the refill lead removal opening 2a and the bottom 2c along the longitudinal direction of the case body 2.

[0014] The distance from the inner bottom 2e (see FIG. 7, etc.) to the refill lead removal opening 2a in the longitudinal direction of the case body 2 may be shorter than the length of the refill lead 3 stored in the case body 2. In this case, a portion of the refill lead 3 stored in the case body 2 is exposed from the case body 2, making it easy to remove the refill lead 3 from the case body 2 when the refill lead removal opening 2a is open.

[0015] The cover member 4 is slidable relative to the case body 2, and is configured to be able to open and close the refill lead removal opening 2a of the case body 2 by sliding it relative to the case body 2. When the refill lead removal opening 2a is open, it means that at least a portion of the refill lead removal opening 2a is not covered by the cover member 4, and the refill lead 3 stored in the case body 2 can be removed with fingers. When the refill lead removal opening 2a is closed, it means that the entire refill lead removal opening 2a is covered by the cover member 4, and the refill lead 3 stored in the case body 2 cannot be removed with fingers.

[0016] The locking member 5 is configured to switch between an engaged state in which it is engaged with either the case body 2 or the cover member 4 and a disengaged state in which it is not engaged with either the case body 2 or the cover member 4 by moving relative to the case body 2 and the cover member 4 in a direction intersecting the sliding direction of the cover member 4 relative to the case body 2.

[0017] When the locking member 5 is in an engaged state, the refill lead removal opening 2a is closed by the cover member 4, and the cover member 4 is maintained in a state where it cannot slide relative to the case body 2. On the other hand, when the locking member 5 is in a disengaged state, the cover member 4 is slidable relative to the case body 2, and by sliding the cover member 4 relative to the case body 2, the refill lead removal opening 2a can be opened or closed.

[0018] In the illustrated exemplary embodiment, the cover member 4 is slidable along the second direction relative to the case body 2, and the locking member 5 is movable along a first direction intersecting the second direction relative to the case body 2 (see FIGS. 1 to 3, 7, 9, and 11). The first direction is a direction connecting the lead removal opening 2a and the bottom 2c of the case body 2, and may be the longitudinal direction of the case body 2. The second direction may be a direction perpendicular to the first direction or the width direction of the case body 2.

[0019] In the above-described embodiment, the lead refill case 1 for mechanical pencils includes a cover member 4 that can be slid relative to the case body 2 to open and close the lead removal opening 2a of the case body 2, and a locking member 5 that can engage with either the case body 2 or the cover member 4. By moving the locking member 5 in the intersecting direction, it is possible to switch between an engaged state in which the locking member 5 engages with either the case body 2 or the cover member 4, and a disengaged state in which the locking member 5 does not engage with either the case body 2 or the cover member 4. Therefore, by engaging the locking member 5 with either the case body 2 or the cover member 4, the refill lead removal opening 2a is closed by the cover member 4 and the cover member 4 can be maintained in an unslidable state (engaged state), so the refill lead removal opening 2a can be maintained in a closed state more reliably. Also, by moving the locking member 5 in the intersecting direction, it is possible to easily switch between the aforementioned engaged state and a disengaged state in which the cover member 4 can slide relative to the case body 2.

[0020] In some embodiments, the locking member 5 has a protrusion 5a that protrudes in the above-mentioned intersecting direction (the first direction in the illustrated embodiment) from the other of the case body 2 or the cover member 4 (the one with which the locking member 5 does not engage) toward one of the case body 2 or the cover member 4 (the one with which the locking member 5 engages). The one of the case body 2 or the cover member 4 (the one with which the locking member 5 engages) has an engagement groove 4a with which the protrusion 5a can engage. In the engaged state of the locking member 5, the protrusion 5a is engaged with the engagement groove 4a, and in the disengaged state of the locking member 5, the protrusion 5a is not engaged with the engagement groove 4a. In the engaged state, the protrusion 5a may be fitted into the engagement groove 4a with a slight gap.

[0021] 1 to 3 and 4 to 13, the locking member 5 has a protrusion 5a that protrudes in the above-mentioned intersecting direction (direction along the first direction) from the case body 2 toward the cover member 4. In addition, the cover member 4 has an engagement groove 4a with which the protrusion 5a of the locking member 5 can engage.

[0022] 1 to 3, the locking member 5 including the protrusion 5a is supported by the case body 2 so as to be movable along the groove 2b extending in the intersecting direction. The cover member 4 is formed with an engagement groove 4a that is recessed from the surface of the cover member 4 and extends in the intersecting direction. The protrusion 5a of the locking member 5 is engageable with the engagement groove 4a provided in the cover member 4.

[0023] 4 to 13, the case body 2 includes a ventral wall portion 2g and a dorsal wall portion 2f that extend between the bottom portion 2c of the case body 2 and the refill lead removal opening 2a and face each other, and a pair of side walls 2r, 2s that connect the ventral wall portion 2g and the dorsal wall portion 2f. The locking member 5 includes a base portion 5b that faces the ventral wall portion 2g of the case body 2, and a pair of side plates 5d, 5c that face the pair of side walls 2r, 2s of the case body 2, respectively. Of the pair of side plates 5d, 5c of the locking member 5, the side plate 5d includes a protrusion 5a that protrudes from the base portion 5b in a direction from the bottom portion 2c of the case body 2 toward the refill lead removal opening 2a.

[0024] 4 to 13, the cover member 4 includes an opening cover portion 4d capable of covering the lead removal opening 2a of the case body 2, and a back cover portion 4e facing the back wall portion 2f of the case body 2. The engagement groove 4a is at least partially formed by a first side surface 4i of a protrusion 4h that protrudes from the surface of the back cover portion 4e facing the back wall portion 2f (case body 2). The first side surface 4i is a surface extending along a first direction. More specifically, the engagement groove 4a is at least partially formed by the first side surface 4i and the inner wall surface of the side wall portion 4j of the cover member 4.

[0025] That is, the protrusion 5a, which is part of the side plate 5d of the locking member 5, can engage with the engagement groove 4a formed by the first side surface 4i of the protrusion 4h of the case body 2 and the inner wall surface of the side wall 4j.

[0026] According to the above-described embodiment, the locking member 5 is provided with the convex portion 5a, and the case main body 2 or the cover member 4 (the cover member 4 in the illustrated embodiment) is provided with the engagement groove 4a that can engage with the convex portion 5a of the locking member 5. Therefore, by moving the locking member 5 in the intersecting direction, the convex portion 5a of the locking member 5 can be engaged with the engagement groove 4a of the case main body 2 or the cover member 4, or the engagement of the convex portion 5a with the engagement groove 4a can be released.

[0027] In the exemplary embodiment shown in Figures 4 to 13, the case body 2 is fitted into the locking member 5, and the cover member 4 is movable relative to the case body 2 and the locking member 5 in a sliding direction along the second direction.

[0028] 7, 9, and 11, when the case body 2 is fitted into and assembled into the locking member 5, the case body 2 is slidable along the longitudinal direction of the case body 2 relative to the locking member 5. The position of the locking member 5 in the longitudinal direction of the case body 2 is regulated by engagement between protrusions 2t, 2u, 2v, and 2w of the case body 2 that protrude in the width direction toward the locking member 5 and protrusions 5i and 5j of the locking member 5 that protrude in the width direction toward the case body 2.

[0029] That is, the lower surfaces of the protrusions 2t, 2v of the case body 2 (the surfaces on the bottom 2c side in the longitudinal direction of the case body 2) come into contact with the upper surfaces of the protrusions 5i, 5j of the locking member 5 (the surfaces on the lead removal opening 2a side in the longitudinal direction of the case body 2), thereby restricting the position of the locking member 5 closest to the lead removal opening 2a in the longitudinal direction with respect to the case body 2. Furthermore, the upper surfaces of the protrusions 2u, 2w of the case body 2 (the surfaces on the lead removal opening 2a side in the longitudinal direction of the case body 2) come into contact with the lower surfaces of the protrusions 5i, 5j of the locking member 5 (the surfaces on the bottom 2c side in the longitudinal direction of the case body 2), thereby restricting the position of the locking member 5 closest to the bottom 2c in the longitudinal direction with respect to the case body 2.

[0030] The protrusions 5i and 5j of the locking member 5 are adapted to move in recesses 2z and 2m provided in the side walls 2r and 2s of the case body 2. The recess 2z is provided in the region between the protrusions 2t and 2u in the longitudinal direction of the case body 2, and the recess 2m is provided in the region between the protrusions 2v and 2w in the longitudinal direction of the case body 2.

[0031] Therefore, when the case body 2 is fitted into the locking member 5, the case body 2 and the locking member 5 can move together. Note that the case body 2 is integrated with the locking member 5 although it can move, and is prevented from coming apart or falling off, due to the engagement between the convex portions 5i and concave portions 2z on both sides of the case body 2 and the locking member 5, and the engagement between the convex portions 5j and concave portions 2m.

[0032] In the above-described embodiment, since the case body 2 is fitted into the locking member 5, the cover member 4 can be easily slid relative to the case body 2 and the locking member 5 by operating with one hand, for example.

[0033] In addition, in the illustrated embodiment, the rear wall portion 2f of the case main body 2 and the plate-shaped rear cover portion 4e of the cover member 4 are opposed to each other, so that by aligning the case main body 2 with the rear cover portion 4e, the cover member 4 can be smoothly slid relative to the case main body 2 (and the locking member 5).

[0034] Furthermore, in the illustrated embodiment, a fitting protrusion 2h that protrudes in the second direction toward the side plate 5c of the locking member 5 is formed on the side wall 2s of the case body 2, and a fitting protrusion 5f that protrudes in the second direction toward the side wall 2s of the case body 2 is formed on the side plate 5c of the locking member 5. When the locking member 5 is in an engaged state, the fitting protrusion 2h and the fitting protrusion 5f are fitted together. This makes it easier to maintain the engaged state of the locking member 5 when the refill lead case 1 is not being opened or closed (i.e., when no force is being applied to move the locking member 5 or the cover member 4).

[0035] In some embodiments, as shown in Figs. 4 to 13, the refill lead case 1 includes a required convex portion 2d provided on one of the case body 2 or the cover member 4 (the case body 2 in the example shown in Figs. 4 to 13), and a required concave portion 4c provided on the other of the case body 2 or the cover member 4 (the cover member 4 in the example shown in Figs. 4 to 13), with which the required convex portion 2d engages. The cover member 4 is movable relative to the case body 2 and the locking member 5 so as to rotate about the required convex portion 2d and the required concave portion 4c. In the exemplary embodiment shown in Figs. 4 to 13, the required concave portion 4c is a hole provided in the cover member 4.

[0036] In the above-described embodiment, the cover member 4 is movable relative to the case body 2 and the locking member 5 so as to rotate around the required convex portion 2d and the required concave portion 4c, and therefore the cover member 4 can be easily slid relative to the case body 2 and the locking member 5 by operating it with one hand, for example.

[0037] In this embodiment, the sliding direction of the cover member 4 relative to the case body 2 is the same as the rotation direction of the cover member 4 about the required convex portion 2d and the required concave portion 4c, and the cover member 4 moves on an arc-shaped track. This sliding direction (rotation direction) is along the second direction (the direction along the width direction of the case body 2).

[0038] In some embodiments, as shown in Figures 1 to 13, for example, one of the case body 2 and the cover member 4 with which the locking member 5 engages includes a movement restricting portion 4b for restricting movement of the locking member 5 in a direction from the other of the case body 2 or the cover member 4 toward the other of the case body 2 or the cover member 4 in a cross direction (a direction along the second direction) of the locking member 5 in a disengaged state.

[0039] In the exemplary embodiment shown in Figures 1 to 13, the cover member 4 includes the above-mentioned movement restricting portion 4b, and the movement restricting portion 4b is configured to restrict movement of the locking member 5 in the intersecting direction (direction along the second direction) from the case main body 2 toward the cover member 4 in the disengaged state.

[0040] In the above-described embodiment, the movement restricting portion 4b is provided to restrict movement of the locking member 5 in the transverse direction in the disengaged state, thereby preventing movement of the locking member 5 in the transverse direction in the disengaged state. This makes it possible to prevent unintended movement of the locking member 5 in the transverse direction from interfering with the sliding movement of the cover member 4 relative to the case body 2.

[0041] In the exemplary embodiment shown in FIGS. 1 to 13, the movement restricting portion 4b extends along the sliding direction and has an abutment surface 4l against which the tip surface 5h of the protrusion 5a of the locking member 5 in the disengaged state can abut.

[0042] In this case, the tip surface 5h of the protrusion 5a of the locking member 5 abuts against the abutment surface 4l of the movement restricting portion 4b, thereby restricting the movement of the locking member 5 in the intersecting direction (direction along the second direction) in the disengaged state.

[0043] In the exemplary embodiment shown in FIGS. 4 to 13, the contact surface 4l of the movement restricting portion 4b includes the second side surface 4k of the protruding portion 4h of the rear cover portion 4e.

[0044] According to the above-described embodiment, with a simple configuration in which the above-described protrusion 4h is provided on the cover member 4, the engagement groove 4a can be formed by utilizing the first side surface 4i of the protrusion 4h, and in addition, the abutment surface 4l of the movement restricting portion 4b can be formed by utilizing the second side surface 4k of the protrusion 4h.

[0045] 4 to 13, the second side surface 4k has an arc shape, which can appropriately restrict movement of the locking member 5, which rotates together with the case body 2 around the required convex portion 2d and the required concave portion 4c relative to the cover member 4 in the intersecting direction (the direction along the second direction) in the disengaged state.

[0046] In some embodiments, as shown in FIG. 12, for example, the refill lead case 1 includes a rib 2p that protrudes from the inner wall surface 2q of the case body 2 and extends along the first direction (the longitudinal direction of the case body 2).

[0047] According to the above-described embodiment, the case body 2 has a rib 2p that protrudes from the inner wall surface 2q and extends along the first direction (the direction connecting the refill lead removal opening 2a and the bottom 2c), so that the multiple mechanical pencil refill leads 3 stored in the case body 2 can be separated by the rib 2p into groups of fewer refill leads 3. Therefore, as shown in Fig. 13, when the refill lead removal opening 2a of the case body 2 is open, it is easy to remove a small number of refill leads 3.

[0048] By appropriately setting the installation position of the rib 2p (for example, the distance between the side wall 2s and the rib 2p), it is possible to adjust the number of refills 3 to be dispensed. For example, by setting the distance between the side wall 2s and the rib 2p to be more than one time and not more than two times the thickness of one refill 3, it becomes easier to dispense only one refill.

[0049] In some embodiments, as shown in Figures 1 to 13, for example, a mechanical pencil refill case 1 is made up of only three parts: a part including a case body 2, a part including a cover member 4, and a part including a locking member 5.

[0050] In this case, the above-mentioned mechanical pencil refill case can be constructed using a small number of parts, which makes it possible to more reliably keep the refill lead outlet closed while suppressing increases in manufacturing costs, and also realizes a configuration that allows the locking member 5 to be easily switched between an engaged state and a disengaged state.

[0051] Hereinafter, the mechanical pencil refill case according to several embodiments will be described in more detail.

[0052] A refill lead case for a mechanical pencil according to some embodiments of the present invention comprises at least a cylindrical case body with a bottom that accommodates refill leads for the mechanical pencil, and a cover member that can close the refill lead opening of the case body. At least one of the cover member or the case body is formed with a locking mechanism that, when operated, enters into an engagement groove (keyhole) of the other and is displaced to a position where it abuts against the other, restricting the relative sliding of the case body and the cover member and maintaining the closed state of the case body. Also, the case is provided with a locking mechanism engaging means that unlocks the locking mechanism when the refill lead opening is open and the mechanical pencil refill is exposed.

[0053] The shape of the case body and the cover member is preferably a flat box shape so that they can be easily gripped by fingers, as they are opened and closed by sliding them together, but they may also be cylindrical, elliptical cylindrical, triangular box-shaped, square box-shaped, or polygonal box-shaped as long as the advantages of the present invention, such as ease of operation and ease of manufacture, are not impaired.

[0054] The sliding that accompanies the opening and closing operation of the case body and the cover member may be a linear parallel movement of the case body and the cover member, a serpentine movement, a fan-shaped movement with the connecting part as the center of rotation, or a rotating screw movement such as a double cylinder. If the required connecting portion is designed to slide in a fan shape with the center of rotation as the center, the required connecting portion, which serves as a fulcrum for the case body and cover member to rotate in a fan shape, can be designed by forming a convex portion on one of the case body and cover member and forming a recess or hole on the other into which the convex portion fits, or by fitting a grommet member into the recess or hole formed on both.

[0055] The case body has a lead take-out opening formed at a position where the distance from the inner bottom of the case body is shorter than the total length of the mechanical pencil lead to be stored, so that the end of the mechanical pencil lead is exposed to the outside when the lead take-out opening is open. The shape of the opening edge of the lead removal port can be rectangular, circular, oval, triangular, square, or any other polygonal shape, and may be different from the outer shape of the case body.

[0056] The cover member has a rear cover portion (sliding rear panel portion) with a flat inner surface between the case body and the sliding surface on which the opening cover portion (cover portion) that covers the refill outlet slides relative to one another. The surface of the case body facing the rear cover portion of the cover member is also formed as a slidable rear wall portion (rear flat portion). Its shape is a flat surface, but it is sufficient that the case body and the cover member can slide relative to each other. For example, they may be flat with corrugated or lattice-like irregularities formed by forming a gap between them, or they may have an irregular relationship with each other along a straight line or a fan-shaped rotation path. However, it can be said that having smooth surfaces is advantageous in terms of manufacturing and operation.

[0057] By forming a protrusion on one side of the cover member or the case body and forming a fitting portion for this protrusion on the other side, it is possible to create a mechanism in which the cover member keeps the refill outlet closed.In addition, it is also possible to maintain the operating position of the cover member by adjusting the friction resistance of the opposing sliding surfaces, rather than relying on a fitting of concave and convex parts. Alternatively, a component such as a resilient member, piston, or damper may be used between the cover member and the case body to control the relative movement.

[0058] By arranging a locking member on the case body so that it slides along the case body and making a part of the locking member insertable into and removable from an engagement groove (keyhole portion) in the cover member, the size of the entire mechanical pencil refill case can be changed between the locked and unlocked states, and the locked and / or unlocked states can be easily confirmed visually. Furthermore, when the locking member is slid relative to the case body, a portion of the case body may be exposed, thereby displaying a display indicating the locked state. The display may be in the form of letters or a logo, or may be a portion of the exposed surface cut out or a window hole provided to expose the mechanical pencil lead inside. There are no particular restrictions on the display as long as the changed state can be recognized. The display content may also be provided by directly providing irregularities on the component, by changing the surface roughness of the display, or by displaying colored letters or logos by transfer printing or painting, as appropriate.

[0059] The mechanical pencil refill case according to some embodiments of the present invention is equipped with a locking mechanism engaging means, which prevents accidental operation of the locking operation (prohibits actuation of the locking member in the unlocked state) when the refill lead port is open and the mechanical pencil refill lead is exposed. Furthermore, prohibiting the locking member from being driven in this unlocked state prevents the locking member from interfering with the operation to close the cover member and the case body (a state in which the refill for the mechanical pencil is not exposed to the outside), thereby reducing damage caused by unnecessary collisions between parts. The locking mechanism engaging means may be formed by forming a movement restricting portion (lock prevention wall) on the cover member so that the locking member collides with the movement restricting portion (lock prevention wall) to prevent it from operating as a locking mechanism, or may be linked to the relative sliding movement of the cover member and the case body and utilize that force to rotate a rack and pinion or worm gear, or may be a link mechanism that maintains the locking member in an unlocked state like the legs of a folding desk, and any mechanism that can prevent incorrect locking operation (prohibits the locking member from being operated when in an unlocked state) will suffice.

[0060] In order to form the movement restriction portion (lock prevention wall) over the entire range of the locking mechanism, it is possible to restrict the movement range of either the cover member or the case body on which the locking member is located relative to the other. For example, it is possible to have a barrier on both the cover member and the case body that restricts the maximum opening amount.

[0061] The materials that can be used to construct the case body, cover member, and locking member include various synthetic resins such as acrylonitrile styrene copolymer resin (AS resin), acrylonitrile butadiene styrene copolymer resin (ABS resin), polycarbonate resin (PC resin), polystyrene resin (PS resin), polyoxymethylene (polyacetal) resin (POM resin), polybutylene terephthalate resin (PBT resin), polypropylene resin (PP resin), and polyethylene terephthalate resin (PET resin). Furthermore, if the case body, cover member, and lock member are made of the same material, the high affinity between the materials may cause poor sliding due to sticking, so it is preferable to use different materials for the two, or to apply a lubricant such as silicone oil or grease between the two.Furthermore, it is preferable to form the case body from a highly transparent resin such as acrylonitrile styrene copolymer resin (AS resin) so that the refills for the mechanical pencils stored inside can be seen. The material may be transparent, translucent, or colored, and can be selected appropriately depending on the application. Metal may also be used to create a luxurious feel, and the material is not particularly limited. Alternatively, the exterior surface may be glossy or textured, or may be decorated with printing or other methods.

[0062] A description will be given of a mechanical pencil refill case according to one embodiment shown in Figures 1 to 3. Note that Figures 1 to 3 only show the operation of mechanical pencil refill case 1, and therefore omit mechanisms and locking structures necessary for sliding. Hereinafter, the refill outlet 2a side of the case body 2 will be referred to as the upper direction, the bottom side as the bottom direction, the front side as the front direction, the back side as the back direction, and the side side as the lateral direction.

[0063] As shown in Figure 1, the mechanical pencil refill case 1 has a box-shaped, bottomed, cylindrical case body 2 that stores mechanical pencil refills, a box-shaped cover member 4 that can close the refill lead removal opening 2a of the case body 2, and a convex locking member 5 that locks the case. The locking member 5 is slidable upward and downward along the groove 2b of the case body 2. The case body 2 is also slidable laterally relative to the cover member 4, and the refill outlet of the case body 2 is exposed by the sliding movement.

[0064] Figure 1 shows a state in which the protrusion 5a of the locking member 5 is fitted into the engagement groove (keyhole portion) 4a of the cover member 4 (engaged state), and the case main body 2 is engaged with the protrusion 5a of the locking member 5, making it unable to slide laterally relative to the cover member 4 (locked state). As shown in Figure 2, the locking member 5 is slid downward along the groove 2b of the case body 2, and the protrusion 5a of the locking member 5 is removed from the engagement groove (keyhole) 4a of the cover member 4, thereby releasing the locked state (disengaged state), allowing the case body 2 and the cover member 4 to slide sideways relative to each other, opening the lead removal opening 2a of the case body 2 and exposing the mechanical pencil lead 3, allowing the mechanical pencil lead 3 to be removed (see Figure 3). At this time, the movement restriction portion (lock prevention wall) 4b of the cover member 4 is positioned above the protrusion 5a of the locking member 5, so the upward movement of the locking member 5 is restricted and the locking member 5 cannot move, preventing accidental operation of the locking operation (maintaining the unlocked state).

[0065] A description will be given of a mechanical pencil refill case according to one embodiment shown in Figures 4 to 11. Hereinafter, the refill lead removal opening 2a side of the case body 2 will be referred to as the upper direction, the bottom 2c side as the bottom direction, the front side as the front direction, and the rear side as the rear direction.

[0066] As shown in Figure 4, which is an exploded oblique view of the embodiment, and Figure 5, which is an exploded oblique view from the back of Figure 4, the mechanical pencil refill case 1 has a flat, box-shaped, bottomed, cylindrical case body 2 that stores mechanical pencil refills 3, a flat, box-shaped cover member 4, and a locking member 5 that operates the lock. A required convex portion 2d of the case body 2 and a required concave portion (required connection hole) 4c of the cover member 4 are formed at the bottom portion of the mechanical pencil refill case 1, and the required convex portion 2d is inserted and fitted into the required concave portion (required connection hole) 4c to form a required connection portion, which allows the case body 2 and the cover member 4 to rotate relatively in a fan shape around that portion. In addition, the locking member 5 has a flat base 5b, side plate portions (side wall portions) 5c, 5d, and a bottom wall portion 5e, and the side plate portions (side wall portions) 5c, 5d on both sides cover and fit into the outside of the case main body 2, making it possible to slide upward and downward relative to the case main body 2.

[0067] A groove 2x is provided in the bottom 2c of the case body 2 along the width direction of the case body 2. This allows the case body 2 to bend when the required convex portion 2d of the case body 2 is inserted into the required concave portion 4c of the cover member 4, thereby preventing damage to the case body 2.

[0068] Furthermore, the required convex portion 2d of the case body 2 includes an oblique cut portion 2dd where the thickness of the required convex portion 2d changes in a tapered shape. Furthermore, the cover member 4 is provided with a groove 4m recessed from the inner surface of the cover member 4 around the required recess 4c. Therefore, the required convex portion 2d of the case body 2 can be smoothly inserted into the required recess 4c of the cover member 4.

[0069] The case body 2 has a rectangular lead removal opening 2a at a position whose distance from the inner bottom 2e of the case body 2 is shorter than the total length of the mechanical pencil lead 3 to be stored, so that the end of the mechanical pencil lead 3 is exposed when the case body 2 is open. The length of the exposed end of the mechanical pencil refill 3 can be adjusted by adjusting the distance from the inner bottom 2e of the case body 2 to the refill lead removal opening 2a, but the length of the exposed end of the mechanical pencil refill 3 necessary to visually pick up the required number with the fingertips is preferably 1.8 mm or more and 12 mm or less.

[0070] By making the lead removal opening 2a and the inner bottom 2e the same shape and in parallel positions, the exposed ends of the mechanical pencil lead 3 stored in the case body 2 can be made uniform in length, but the inner bottom 2e may also be formed and positioned non-parallel, such as diagonally, to the lead removal opening 2a, to make it easier to remove just one or a few mechanical pencil lead 3. By forming ribs inside the case body 2, when a large number of built-in mechanical pencil refills 3 (20 or more) are stored inside the case body 2, several of them can be positioned in different areas inside the container, and only a specific small number (1 to 5) of mechanical pencil refills 3 can be exposed to the outside.

[0071] The cover member 4 has an opening cover portion (cover portion) 4d that covers the refill lead removal port 2a and a required recess (required connection hole) 4c that is the required connection portion to the case main body 2, and the inner surface of the portion between the two portions is a flat back cover portion (sliding back panel portion) 4e that faces the back wall portion (back flat portion) 2f of the case main body 2.

[0072] 6 and 7 show a state in which the relative movement between the case body 2 and the cover member 4 is locked. The locking member 5 is positioned to cover the ventral wall portion (abdominal portion) 2g opposite the dorsal wall portion (dorsal plane portion) 2f of the case main body 2, and by sliding it relative to the cover member 4, it can be switched between a locked state and an unlocked state, which will be described later. By sliding the locking member 5 relative to the cover member 4 and inserting the convex portion 5a of the locking member 5 into the engagement groove (keyhole portion) 4a of the cover member 4 (engaged state), the case body 2 and the cover member 4 become immovable relative to each other. At this time, the locking state can be maintained by engaging the engagement protrusion 2h formed on the case body 2 with the engagement protrusion 5f formed on the locking member 5.

[0073] 8 and 9 show a state in which the lock between the case body 2 and the cover member 4 is released. By sliding the locking member 5 toward the bottom relative to the case body 2 and removing the protrusion 5a of the locking member 5 from the engagement groove (keyhole portion) 4a of the cover member 4, the case body 2 and the cover member 4 become relatively movable (unlocked state). By moving the locking member 5, which is arranged to cover the ventral wall portion (ventral portion) 2g opposite the dorsal wall portion (dorsal plane portion) 2f of the case body 2, toward the bottom relative to the case body 2, the overall length of the mechanical pencil lead refill case 1 increases, making the unlocked state visible. In the unlocked state, the fitting protrusion 2h formed on the case body 2 and the fitting protrusion 5f formed on the locking member 5 fit together to maintain the unlocked state. Furthermore, when the above-mentioned locking member 5 is slid toward the bottom relative to the case body 2 to set it in the unlocked state, the upper part of the ventral wall portion (abdomen) 2g of the case body 2 is exposed, and an indicator portion 2i indicating the unlocked state is formed on the exposed ventral wall portion (abdomen) 2g to indicate that it is in the unlocked state.

[0074] In the locked state, the lead protrusion prevention wall 5g protrudes upward from the lead removal port 2a, so that when the locking member 5 is slid toward the bottom relative to the case body 2 during the unlocking operation, in the unlocked state the lead protrusion prevention wall 5g formed on the locking member 5 also moves downward to a position approximately the same as the top part 2j of the case body 2 or to a position lower than the top part 2j. In addition, in the locked state, the lead protrusion prevention wall 5g protrudes upward from the lead removal opening 2a, and acts as a shutter to prevent foreign objects from entering through the hole in the side of the mechanical pencil refill case 1, and in the unlocked state, when the mechanical pencil refill 3 is directly picked up with the fingers and removed from the lead removal opening 2a in the open state, the lead protrusion prevention wall 5g prevents the mechanical pencil refill 3 from interfering with the removal of the mechanical pencil refill 3. The lead protrusion prevention wall 5g may also be formed on the case body 2 side.

[0075] 10 and 11 show the state in which the lead removal opening 2a of the case body 2 is open. By rotating the case body 2 and the cover member 4 relatively in a fan shape, the lead removal opening 2a of the case body 2 opens, exposing the mechanical pencil lead 3 and allowing the mechanical pencil lead 3 to be removed. At this time, because the movement restriction portion (lock prevention wall) 4b of the cover member 4 is positioned above the locking member 5, the upward movement of the locking member 5 is restricted, maintaining the unlocked state and preventing accidental operation of the locking member 5. The movement restricting portion (lock prevention wall) 4b is formed in a range that restricts the upward movement of the locking member 5 during the opening operation of the case body 2.

[0076] Furthermore, when the case body 2 and the cover member 4 are rotated in a fan shape relative to each other, the opening-restricting wall 2k of the case body 2 comes into contact with the opening-restricting rib 4f of the cover member 4, so that the movement range of the convex portion 5a of the locking member 5, which moves with the case body 2, is restricted to the range of the movement restriction portion (lock prevention wall) 4b arranged so as to be positioned above the convex portion 5a, preventing the locking member 5 from moving upward, and more reliably preventing erroneous locking operation (maintaining the unlocked state). As shown in Fig. 5, the opening-restricting wall 2k may be formed by the inner surface of a recess 2o recessed from the surface of the back wall portion 2f.

[0077] After refilling the mechanical pencil with mechanical pencil refill 3, the case body 2 and cover member 4 are rotated relative to each other in a fan shape to close the refill lead outlet 2a, and the locking member 5 is then slid upward relative to the case body 2, thereby returning the refill lead outlet 2a to a locked state in which it remains closed. At this time, sliding the locking member 5 upward relative to the case body 2 returns the entire length of the mechanical pencil refill case 1 to its original length, making it easy to visually confirm that the case is locked.

[0078] 4, the ventral wall 2g of the case body 2 may have a step 2l at the end on the lead removal opening 2a side, the step 2l having a surface recessed below the surface of the ventral wall 2g. In this case, even if the opening cover 4d of the cover member 4 is deformed and narrowed after molding, it is easy to maintain the clearance between the opening cover 4d and the case body 2. This makes it easier to slide the cover member 4 smoothly relative to the case body 2.

[0079] 5, the rear wall 2f of the case body 2 may have a recess 2n recessed from the surface of the rear wall 2f. The recess 2n may extend over a range of at least half the length of the case body 2 in the longitudinal direction of the case body 2.

[0080] Repeated sliding of the cover member 4 relative to the case body 2 may cause scratches on the surface of the rear wall portion 2f of the case body 2 and the inner surface of the rear cover portion 4e of the cover member 4. In this regard, by providing the recess 2n described above, the contact area between the rear wall portion 2f and the rear cover portion 4e can be reduced, thereby suppressing the occurrence of the above-mentioned scratches.

[0081] As shown in Fig. 4, the case body 2 may have a recess 2y recessed from the ventral wall 2g or the dorsal wall 2f. The recess 2y may be located in a position different from the portion that houses the refill 3 in the longitudinal direction of the case body 2. In the example shown in Fig. 4, the recess 2y is located closer to the bottom 2c than the inner bottom 2e (see Fig. 7) in the longitudinal direction of the case body 2. By providing such a recess 2y, the thickness of the material, such as resin, tends to be uniform during molding of the case body 2, making it easier to prevent sink marks.

[0082] As shown in Figure 5, the base 5b of the locking member 5 may have a stepped portion 5k, which has a surface recessed from the inner surface of the base 5b. By providing the stepped portion 5k, the thickness of the base 5b of the locking member 5 is reduced, making it easier to increase the thickness of the case body 2. This allows the cross-sectional area of ​​the refill lead 3 storage compartment in the case body 2 to be increased, making it easier to insert the refill lead 3 into the case body 2. This reduces the occurrence of defects when inserting the refill lead 3 into the case body 2 during production of the refill lead case 1.

[0083] The contents described in each of the above embodiments can be understood, for example, as follows.

[0084] (1) At least one embodiment of the mechanical pencil refill case (1) of the present invention is A case body (2) for storing replacement leads (3) for mechanical pencils; a cover member (4) that can open and close a lead removal opening (2a) of the case body by sliding it relative to the case body; a locking member (5) configured to switch between an engaged state in which the locking member is engaged with either the case body or the cover member and a disengaged state in which the locking member is not engaged with either the case body or the cover member by moving relative to the case body and the cover member in a direction intersecting the sliding direction of the cover member relative to the case body; Equipped with In the engaged state, the cover member is configured to be maintained in a state in which it closes the refill lead removal opening and is unable to slide relative to the case body.

[0085] According to the configuration (1) above, the lead refill case for a mechanical pencil includes a cover member that can be slid relative to the case body to open and close the lead removal opening of the case body, and a locking member that can engage with either the case body or the cover member. By moving the locking member in the cross direction, it is possible to switch between an engaged state in which the locking member engages with either the case body or the cover member, and a disengaged state in which the locking member does not engage with either the case body or the cover member. Therefore, by engaging the locking member with either the case body or the cover member, the refill lead removal opening is blocked by the cover member and the cover member can be maintained in an unslidable state (engaged state), so the refill lead removal opening can be maintained in a closed state more reliably. Also, by moving the locking member in the cross direction, it is possible to easily switch between the aforementioned engaged state and a disengaged state in which the cover member can slide relative to the case body.

[0086] (2) In some embodiments, in the configuration of (1), The one of the case body and the cover member includes a movement restricting portion (4b) for restricting movement of the locking member in the intersecting direction in the disengaged state.

[0087] According to the above configuration (2), the movement restricting portion is provided to restrict movement of the locking member in the transverse direction when the locking member is in the disengaged state, thereby preventing the locking member from moving in the transverse direction when the locking member is in the disengaged state. This prevents the cover member from being prevented from sliding relative to the case body due to unintended movement of the locking member in the transverse direction.

[0088] (3) In some embodiments, in the configuration of (1) or (2), the locking member has a protrusion (5a) that protrudes in the intersecting direction from the other of the case body or the cover member toward the one of the case body or the cover member, The one of the case body and the cover member has an engagement groove (4a) with which the protrusion can engage, The engaged state is a state in which the protrusion is engaged with the engagement groove, and the disengaged state is a state in which the protrusion is not engaged with the engagement groove. The engaged state may be a state in which the protrusion is fitted into the engagement groove with a slight gap.

[0089] According to the configuration (3) above, a protrusion is provided on the locking member, and an engagement groove that can engage with the protrusion of the locking member is provided on the case body or the cover member. Therefore, by moving the locking member in the cross direction, the protrusion of the locking member can be engaged with or disengaged from the engagement groove of the case body or the cover member. This makes it possible to more reliably maintain the refill lead removal opening closed, as described in (1) above, and to easily switch the locking member between the engaged and disengaged states.

[0090] (4) In some embodiments, in the configuration of (3), the one of the case body and the cover member includes a movement restricting portion (4b) for restricting movement of the locking member in the intersecting direction in the disengaged state, The movement restricting portion extends along the sliding direction and includes an abutment surface (4l) against which a tip end surface (5h) of the convex portion in the disengaged state can abut.

[0091] According to the configuration (4) above, the movement restricting portion has a surface (contact surface) extending along the sliding direction of the cover member relative to the case body, and the tip surface of the convex portion of the locking member can contact the contact surface. Therefore, by the convex portion contacting the contact surface, movement of the locking member in the cross direction in the disengaged state can be prevented, and the contact surface can guide movement of the cover member in the sliding direction relative to the case body.

[0092] (5) In some embodiments, in the configuration of (3) or (4), the cover member has the engagement groove with which the protrusion of the locking member can engage, The case body includes: a front wall portion (2g) and a back wall portion (2f) extending between the bottom portion (2c) of the case body and the refill lead outlet and facing each other; A pair of side wall portions (2r, 2s) connecting the ventral wall portion and the dorsal wall portion, The locking member is a base portion (5b) facing the abdominal wall portion of the case body; A pair of side plate portions (5c, 5d) facing the pair of side wall portions of the case body, respectively and One of the pair of side plate portions (5d) includes the convex portion that protrudes from the base portion in a direction from the bottom portion toward the refill lead removal opening.

[0093] According to the configuration (5) above, a simple configuration is provided in which a convex portion protruding from a base is provided on the side plate portion of the locking member that faces one of a pair of side wall portions of the case body, and as described in (3) above, by moving the locking member in the intersecting direction, the convex portion of the locking member can be engaged with the engaging groove of the case body or the cover member, or the engagement of the convex portion with the engaging groove can be released.

[0094] (6) In some embodiments, in the configuration of (5), The cover member is an opening cover portion (4d) capable of covering the refill lead outlet; a rear cover portion (4e) facing the rear wall portion of the case body, The engagement groove is at least partially formed by a first side surface (4i) of a protrusion (4h) that protrudes from the surface of the rear cover portion facing the rear wall portion.

[0095] According to the above configuration (6), with a simple configuration in which the cover member is provided with a protruding portion that protrudes from the surface of the rear cover portion, the engagement groove can be formed by utilizing the first side surface of the protruding portion.

[0096] (7) In some embodiments, in the configuration of (6), the cover member includes a movement restricting portion (4b) for restricting movement of the locking member in the intersecting direction in the disengaged state, the movement restricting portion extends along the sliding direction and has an abutment surface (4l) against which a tip end surface (5h) of the convex portion in the disengaged state can abut, The abutment surface includes a second side surface (4k) of the protrusion of the rear cover portion.

[0097] According to the above configuration (7), with a simple configuration in which the above-mentioned protrusion is provided on the cover member, the engagement groove can be formed by utilizing the first side surface of the protrusion, and the abutment surface of the movement restricting portion can be formed by utilizing the second side surface of the protrusion.

[0098] (8) In some embodiments, in any of the configurations (1) to (7) above, The case body is fitted into the locking member, The cover member is movable in the sliding direction relative to the case body and the locking member.

[0099] According to the above configuration (8), since the case body is fitted into the locking member, the cover member can be easily slid relative to the case body and the locking member by operating with one hand, for example.

[0100] (9) In some embodiments, in the configuration of (8), The mechanical pencil refill case is a required protrusion (2d) provided on one of the case body or the cover member; a required recess (4c) provided on the other of the case body or the cover member, with which the required protrusion engages; The cover member is movable relative to the case body and the locking member so as to rotate about the required convex portion and the required concave portion.

[0101] According to the configuration (9) above, the cover member is movable relative to the case body and the locking member so as to rotate around the required concave and convex portions, and therefore, the cover member can be easily slid relative to the case body and the locking member by operating it with one hand, for example.

[0102] (10) In some embodiments, in any of the configurations (1) to (9) above, The case body has the refill lead removal opening and the bottom portion provided at both ends of the case body in the first direction, The mechanical pencil refill case is The case body includes a rib (2p) that protrudes from an inner wall surface (2q) and extends along the first direction.

[0103] According to the configuration (10) above, a rib is provided that protrudes from the inner wall surface of the case body and extends in the first direction (i.e., the direction connecting the lead removal opening and the bottom), so that the multiple mechanical pencil leads stored in the case body can be divided into groups of fewer leads by the rib. This makes it easier to remove a small number of leads when the lead removal opening of the case body is open.

[0104] (11) At least one embodiment of the mechanical pencil refill case of the present invention comprises: The case comprises at least a cylindrical case body with a bottom for accommodating mechanical pencil refills and a cover member capable of closing a refill refill outlet, The case body has a refill lead removal opening formed at a position where the distance from the inner bottom of the case body to the refill lead removal opening is shorter than the total length of the refill lead for the mechanical pencil to be stored, so that the end of the refill lead for the mechanical pencil is exposed when the case body is open, The cover member has a rear cover portion (sliding rear panel portion) with a flat inner surface, A slidable rear wall portion (rear flat portion) is formed on the surface of the case body facing the rear cover portion (sliding rear panel portion) of the cover member, In this mechanical pencil refill case, the refill lead outlet can be opened and closed by sliding the ventral wall (ventral portion) on the opposite side of the back wall (back flat portion) of the case body and the outer surface of the back cover (sliding back panel portion) of the cover member relative to each other. At least one of the cover member or the case body is provided with a locking mechanism that, when operated, displaces into the other's engagement groove (keyhole portion) and into abutting position, thereby restricting the relative sliding between the case body and the cover member and maintaining the refill outlet in a closed state.

[0105] (12) In some embodiments, in the configuration of (11), The mechanical pencil refill case is The locking mechanism is provided with a locking mechanism engaging means for maintaining the locking mechanism in an unlocked state when the refill lead removal port is open and the mechanical pencil refill lead is exposed to the outside.

[0106] The above describes an embodiment of the present invention, but the present invention is not limited to the above-described embodiment, and also includes forms in which the above-described embodiment is modified, or forms in which these forms are appropriately combined.

[0107] In this specification, expressions expressing relative or absolute arrangement such as "in a certain direction," "along a certain direction," "parallel," "orthogonal," "center," "concentric," or "coaxial" not only express such an arrangement strictly, but also express a state in which there is a relative displacement with a tolerance or an angle or distance to the extent that the same function is obtained. For example, expressions such as "identical," "equal," and "homogeneous" that indicate that something is in an equal state not only indicate a state of strict equality, but also indicate a state in which there is a tolerance or a difference to the extent that the same function is obtained. Furthermore, in this specification, expressions representing shapes such as a rectangular shape or a cylindrical shape not only represent shapes such as a rectangular shape or a cylindrical shape in the strict geometric sense, but also represent shapes including uneven portions, chamfered portions, etc., to the extent that the same effect can be obtained. Furthermore, in this specification, the expressions "comprise," "include," or "have" a component are not exclusive expressions that exclude the presence of other components. [Explanation of symbols]

[0108] 1 Mechanical pencil lead case 2 Case body 2a Refill outlet 2b Groove 2c bottom 2d Convex part 2dd Diagonal cut section 2e inner bottom 2f Dorsal wall (back plane) 2g Ventral wall (abdomen) 2h mating protrusion 2i Display 2j Tenbu 2k Opening Control Wall 2l step part 2m recess 2n recess 2o recess 2p Rib 2q Inner wall 2r side wall 2s side wall 2t convex part 2u convex part 2v convex part 2w convex part 2x groove 2y Stealing Club 2z Recess 3 Mechanical pencil refills 4 Cover member 4a Engagement groove (keyhole) 4b Movement restriction section (lock prevention wall) 4c Required recess (required connection hole) 4d Opening cover (cover) 4e Back cover (sliding back panel) 4f Opening restriction rib 4h protrusion 4i 1st side 4j Side wall part 4k 2nd side 4l Contact surface 4m groove 5 Locking member 5a Convex part 5b base 5c Side plate part (side wall part) 5d Side plate part (side wall part) 5e Bottom wall 5f mating protrusion 5g core protrusion prevention wall 5h Tip surface 5i convex part 5j convex part 5k recess

Claims

1. A case body for storing replacement leads for mechanical pencils; a cover member that can open and close a refill outlet of the case body by sliding it relative to the case body; Equipped with a locking member configured to switch between an engaged state in which the locking member is engaged with one of the case body or the cover member and a disengaged state in which the locking member is not engaged with the one of the case body or the cover member by moving relative to the case body and the cover member in a direction intersecting a sliding direction of the cover member relative to the case body, the one of the case body and the cover member includes a movement restricting portion for restricting movement of the locking member in the intersecting direction in the disengaged state, The distance from the inner bottom to the lead removal opening in the longitudinal direction of the case body is shorter than the length of the lead for the mechanical pencil housed in the case body. A replacement lead case for mechanical pencils.

2. A locking mechanism engaging means configured to prohibit the locking member from being driven when the lead removal port of the case body is open and the mechanical pencil lead is exposed to the outside. The mechanical pencil refill case according to claim 1.

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