Refill case

Abstract

To provide a refill lead case which allows a required number of refill leads to be easily taken out without turning a take-out port of lead downward, and thus solves a problem that a large number of refill leads shoot out of a case at the same time.SOLUTION: A refill lead case comprises: a case body 2 in which an inner space surrounded with a back plate 2a and right and left leg plates 2b is used as a refill lead storage chamber 2c, and a lid part 2e and a case part f are formed on the tip side and on the rear side, respectively, via a bendable thin part 2d formed on the back plate; and a cover member 1 in which a U-shaped cross section orthogonal to the longitudinal direction is formed by a front plate 1a and right and left outer leg plates 1b, the refill lead storage chamber on the case body side is covered with the front plate, and the case body is slidably supported in the longitudinal direction by locating the leg plate of the case body inside the outer leg plate. A rail-like guide 2j is formed in the lid part 2e in the longitudinal direction, and a slider 1g in contact with the guide is disposed in the cover member.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present invention relates to a lead refill case for accommodating writing leads used in mechanical pencils and the like. [Background technology]

[0002] 2. Description of the Related Art Lead replacement cases for storing writing leads used in mechanical pencils and the like are often composed of two parts: a case body with a bottom and a lid body that is removably attached to the opening of the case body. For example, the refill lead case disclosed in Patent Document 1 is composed of two parts: a case body made of a resin material and a lid body also made of a resin material, and the lid body can be slid in a direction perpendicular to the longitudinal direction of the refill lead case to open the opening of the case body (the refill lead removal port). In this case, the sliding position of the lid relative to the case opening can be set in two stages, for example, so that the user can set the opening to a size suitable for removing the refill.

[0003] In addition, the refill case disclosed in Patent Document 2 is composed of two parts: a case body also made of a resin material, and a lid body also made of a resin material, and the lid body is removably attached to the opening of the bottomed case body. The opening (refill outlet) formed in the case body is cut diagonally on the front side, allowing the user to pick up the refill with their fingertips, making the refill case easy to use. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-30136 [Patent Document 2] Japanese Patent Application Laid-Open No. 2010-173248 Summary of the Invention [Problem to be solved by the invention]

[0005] In the refill lead cases disclosed in the above-mentioned patent documents, the refill lead opening must be opened and the case body must be tilted so that the opening faces slightly downward.The refill lead then moves out of the case body and into the opening due to its own gravity, allowing the refill lead to be removed. This requires delicate manipulation, such as adjusting the tilt of the case body while shaking the case body, which can cause more refills than necessary, or even all of the refills inside the case body, to fly out of the opening and scatter on the floor, forcing the user to pick up the refills scattered on the floor.

[0006] This invention was made with an eye on the above-mentioned problems of conventional refill cases, and aims to provide a refill case that allows the refill needed to be easily removed without having to turn the refill removal opening downward, and that solves the problems of conventional refill cases, such as a large number of refills flying out of the case body at the same time. [Means for solving the problem]

[0007] The lead refill case of the present invention, which was made to solve the above-mentioned problems, has an inner space surrounded by a back panel and left and right leg panels, which serves as a lead refill chamber, and includes a case body having a lid body part on the front side and a case part on the rear side via a bendable thin section provided near the longitudinal tip of the back panel, and a front panel and left and right outer leg panels, which form a U-shaped cross section perpendicular to the longitudinal direction, which covers the lead refill chamber on the case body side with the front panel, and the leg panels of the case body are positioned inside the outer leg panels, so that the case body can slide in the longitudinal direction. At least one of the legs of the lid body part On the board A guide body is formed along the longitudinal direction, and The outer leg plate on the cover member side that covers this leg plate isA sliding body is formed in contact with the guide body, and as the lid body of the case main body slides out from the tip of the cover member, the sliding contact of the sliding body with the guide body causes a rotational movement that bends the lid body toward the rear side via the thin-walled portion.

[0008] In this case, in a preferred embodiment, an inner lid is further provided that is attached to the left and right leg plates of the case body and covers the refill storage chamber on the front side, and it is desirable that the inner surface of the back plate of the case body facing the refill storage chamber and the inner surface of the inner lid facing the refill storage chamber each be provided with protrusions to avoid surface contact with the stored refill.

[0009] Furthermore, it is preferable that a pair of protective plates be formed on the inner lid, extending from the thin portion of the case body to the lid body portion, so as to be positioned inside the left and right leg plates, respectively.

[0010] On the other hand, a preferred form of the guide body is formed on the outside of the leg plate of the lid body in a state of protruding like a rail extending in the longitudinal direction. Furthermore, a preferred form of the locking portion is formed so as to protrude so as to contact the guide body at the tip of the cover member from which the lid body is extended by the sliding movement. The guide body is formed with an inclined region that moves away from the back plate from the tip toward the thin-walled portion, thereby providing a rotational movement that bends the lid body toward the back side via the thin-walled portion as the sliding movement occurs.

[0011] In this case, more preferably, a parallel region parallel to the back plate is formed on the tip end side of the contact portion of the guide body with the sliding body, and the inclined region is formed next to the parallel region, so that in the first half of the sliding movement, the lid body can be extended from the tip end of the cover member without rotating the lid body, and in the second half of the sliding movement, the lid body can be rotated to bend toward the back side.

[0012] In addition, in a preferred embodiment, a blocking plate is formed at the tip of the lid body portion by connecting the left and right leg plates to block the tip, and the lid body portion is housed in the cover member, and the blocking plate is positioned at the tip of the cover member so that it can be seen when the front plate of the cover member is viewed from the front.

[0013] Furthermore, it is desirable that both the case body and the cover member are formed from a resin material, that the back surface of the rear panel of the case body is formed with a large number of linear protrusions arranged in a direction perpendicular to the longitudinal direction, and that the surface of the front panel of the cover member is formed with, for example, a circular recess.

[0014] Furthermore, it is desirable that a sliding rib be formed on the outer surface of the inner lid along the longitudinal direction of the inner lid, and that the inner bottom surface of the cover member be matte. [Effects of the Invention]

[0015] According to the refill lead case of the present invention, the case body, which forms the lid and case via a bendable thin section, is slidably mounted within the cover member to form the refill lead case. The lid and cover are provided with guide members and sliders on either side, allowing them to slide against each other as the sliding action occurs, thereby providing a rotational movement that bends the lid toward the rear side as the sliding action occurs. Therefore, by rotating the cover body by the thin portion, the tip of the refill is exposed in a state where it protrudes from the case, so that the refill that is needed can be easily taken out. This allows the refill to be taken out without having to turn the refill outlet downward, so it is possible to provide a refill case that solves the problem of conventional cases where a large number of refills fly out from the case body at the same time.

[0016] In addition, an inner lid that covers the refill storage chamber on the front side is attached to the case body, and protrusions are formed on the inner surface of the case body and the inner lid to avoid surface contact with the refill, effectively solving the problem of the refill sticking to the refill storage chamber due to static electricity. This allows the case body and inner lid to be formed from two parts, so that the problem of damaging the opposing protrusions due to forcible removal during demolding can be avoided compared to when protrusions are formed on opposing inner surfaces using a single part.

[0017] Furthermore, the inner lid is configured with a pair of protective plates positioned from the thin-walled portion of the case body to the lid body portion, formed on the inside of the left and right leg plates of the case body, respectively.This effectively eliminates the problem of the replacement lead getting caught between the leg plate on the lid body side that is bent toward the back side and the leg plate on the case side when the lid body portion that has been extended by a sliding action is returned to the cover member.

[0018] Other effects of the present invention will be explained in the section on the preferred embodiment of the present invention together with the explanation of the embodiments. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a front view of a refill lead case according to a first embodiment of the present invention. [Figure 2] FIG. [Figure 3] 3 is a cross-sectional view taken along line aa in FIG. 2 in the direction of the arrow. [Figure 4] 3 is a cross-sectional view taken along line bb in FIG. 2 in the direction of the arrow. [Figure 5] 10 is a rear view of the lid body part extended partway as viewed from the case body side. FIG. [Figure 6] 6 is a cross-sectional view taken along line cc in FIG. 5, viewed in the direction of the arrow. [Figure 7] FIG. 7 is a cross-sectional view showing a state in which the cover body is further fully opened from the state shown in FIG. 6. [Figure 8]FIG. 10 is a perspective view of the lid body fully opened as viewed from the cover member side. [Figure 9] FIG. 10 is a perspective view of the same with a refill accommodated, as viewed from the cover member side. [Figure 10] FIG. 2 is a front view showing the individual configuration of the case body. [Figure 11] FIG. [Figure 12] FIG. 10 is a perspective view showing the individual configuration of the inner lid. [Figure 13] This is also a front view. [Figure 14] 14 is a cross-sectional view taken along line dd in FIG. 13, viewed in the direction of the arrow. [Figure 15] FIG. 4 is a perspective view showing the individual configuration of the cover member. [Figure 16] This is also a front view. [Figure 17] 17 is a cross-sectional view taken along the line ee in FIG. 16, viewed in the direction of the arrow. [Figure 18] 10 is a perspective view showing the individual configuration of a case body that constitutes a refill lead case according to a second embodiment of the present invention. FIG. [Figure 19] This is also a front view. [Figure 20] FIG. [Figure 21] FIG. 10 is a perspective view showing the single-item configuration of the inner lid of the second embodiment. [Figure 22] This is also a front view. [Figure 23] 23 is a cross-sectional view taken along line ff in FIG. 22 in the direction of the arrow. [Figure 24] FIG. 10 is a perspective view showing a single component configuration of a cover member according to a second embodiment. [Figure 25] This is also a front view. [Figure 26] 26 is a cross-sectional view taken along line gg in FIG. 25 in the direction of the arrow. [Figure 27] FIG. 23 is an enlarged perspective view of a portion surrounded by a chain line j in FIG. 22. [Figure 28] 10 is an enlarged view of a rear corner portion of the refill lead case of the second embodiment. FIG. [Figure 29]FIG. 11 is a perspective view showing a single component configuration of a cover member according to a third embodiment. [Figure 30] FIG. 11 is a perspective view from the outer surface side showing the single-item configuration of the inner lid of the third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0020] The refill lead case according to the present invention will be described with reference to the drawings. 1 to 17 show the refill lead case of the first embodiment, and Fig. 18 to Fig. 28 show the refill lead case of the second embodiment. Furthermore, Fig. 29 and Fig. 30 show part of the refill lead case of the third embodiment. First, the refill lead case of the first embodiment will be described with reference to FIGS. 1 and 2 show the overall structure of the refill lead case as viewed from the front side of the cover member 1 and as viewed from the back side of the case body 2. FIG. In this embodiment, the cover member 1 and case body 2 are molded from a resin material, and the inner lid 3, which is attached to the case body 2 and covered by the cover member 1 (described later), is also molded from a resin material. The case body 2 and inner lid 3 are attached to the cover member 1 so as to be slidable along the longitudinal direction, thereby forming a refill case. In the following description, for convenience of explanation, one end of a lid body portion 2e of the case body 2, which will be described later, in the longitudinal direction when it is extended from the cover member 1 will be referred to as the leading end, and the other end will be referred to as the rear end.

[0021] 10 to 17 show the individual components of the case body 2, inner lid 3 and cover member 1, and the detailed configuration of each component will be described first based on the drawings showing these individual components. Figures 10 and 11 show the case body 2, which is formed by a back panel 2a and left and right leg panels 2b, with a cross section perpendicular to the longitudinal direction formed in a U-shape, and a replacement lead storage chamber 2c is formed in the inner space surrounded by the U-shape.

[0022] A bendable thin portion 2d is provided near the longitudinal tip of the back panel 2a, and a lid portion 2e is formed on the tip side, and a case portion 2f is formed on the rear side. The cover body portion 2e is formed with a blocking plate 2g that blocks the tip of the cover body portion 2e by connecting the left and right leg plates 2b, and the rear portion of the case portion 2f is formed with a rear blocking plate 2h that blocks the rear of the case portion 2f by connecting the left and right leg plates 2b.

[0023] A pair of guide bodies 2j are formed on the outer sides of the left and right leg plates 2b of the cover body 2e, respectively, protruding in a rail-like shape along the longitudinal direction. As shown in Fig. 11, each guide body 2j has a parallel region 2j1 formed on the tip end side of the cover body 2e, which is parallel to the back plate 2a, and an inclined region 2j2 formed next to the parallel region 2j1 and moving away from the back plate 2a toward the thin-walled portion 2d. In addition, the parallel region 2j1 and the inclined region 2j2 of this guide body 2j slide against the sliding body 1g provided on the cover member 1 side as the lid body portion 2e of the case main body 2 slides out from the tip end of the cover member 1, which will be described later, and act to give a rotational movement to the lid body portion 2e to bend it toward the rear side via the thin-walled portion 2d.

[0024] The left and right leg plates 2b of the case portion 2f are formed with fitting recesses 2k for attaching an inner lid 3 (described later) at approximately the center in the longitudinal direction and near the lid body portion 2e. Furthermore, a pair of slide protrusions 2m is formed on both outer sides of the left and right leg plates 2b of the case portion 2f along the longitudinal direction of the case main body 2. These slide protrusions 2m are engaged with case support portions 1d (described later) provided on the cover member 1, and function to support the case main body 2 so that it can slide in the longitudinal direction.

[0025] In addition, rib-shaped click protrusions 2n are formed near the rear of the left and right leg plates 2b of the case portion 2f, and when the cover member 1 slides relative to the case body 2, these click protrusions ride over the click bodies 1f formed on the case body 2, thereby generating a click action. Therefore, this click action also occurs when the case body 2 is returned into the cover member 1. Furthermore, on the inner surface of the back panel 2a of the case portion 2f on the side of the refill lead storage chamber 2c, multiple protrusions 2p that prevent surface contact with the stored refill are formed perpendicular to the longitudinal direction of the case body 2. This prevents the refill lead L from being attracted by static electricity and sticking to the inner surface of the refill lead storage chamber 2c of the case body 2, which is made of a resin material.

[0026] 2, a recess 2q is formed on the rear side of the rear panel 2a of the case body 2 along the longitudinal direction of the rear half, and a large number of linear protrusions 2r are formed within this recess 2q and arranged in a direction perpendicular to the longitudinal direction of the case body 2. An arrow mark 2s, preferably triangular, is formed on the tip side of the recess 2q. The arrow mark 2s indicates the sliding direction of the case body 2 relative to the cover member 1, and the protrusion group 2r functions as a slip prevention for the fingertip during the sliding operation.

[0027] The left and right leg plates 2b of the case body 2 each have an inward rib 2t formed toward the inside of the case body 2. When the inner lid 3, which will be described later, is attached to the case body 2, the inward rib 2t comes into contact with the side of the inner lid 3, filling the gap between the case body 2 and the inner lid 3, and a fitting force of the inner lid 3 to the case body 2 acts. Inward rib 2t This prevents one side from coming loose and improves the fixing strength.

[0028] 12 to 14 show the individual configuration of the inner lid 3 that is attached to the left and right leg plates 2b of the case body 2 and covers the front side of the replacement lead storage chamber 2c. The inner lid 3 is formed flat with rectangular fitting protrusions 3a formed in the longitudinal center and near the tip. The fitting protrusions 3a are fitted into the inner lid fitting recesses 2k formed in the case body 2, positioning the inner lid 3 and the case body 2 and attaching it so that it covers the front side of the refill cartridge chamber 2c of the case body 2.

[0029] At this time, a pair of protective plates 3b formed at the tip of the inner lid 3 are arranged inside the left and right leg plates 2b of the case body 2 so as to be positioned from the thin portion 2d of the case body 2 to the lid body portion 2e. As described in the section on the effects of the invention, this effectively solves the problem of the replacement lead L getting caught between the leg plate 2b on the side of the lid body part 2e, which is bent toward the back side, and the leg plate 2b on the side of the case part 2f, when the lid body part 2e, which has been extended by the sliding action, is returned to the cover member 1.

[0030] In addition, a pair of spacers 3c are formed at the rear of the inner lid 3 so as to protrude from the inner surface of the inner lid 3. Case body 2 It acts to maintain a constant distance between the rear plate 2a and the back plate 2b. Furthermore, multiple protrusions 3d are formed on the inner surface of the inner lid 3 in a direction perpendicular to the longitudinal direction of the inner lid 3. This prevents the resin inner lid 3, which covers the front of the refill lead storage chamber 2c of the case portion 2f, from coming into surface contact with the refill lead L, and prevents the refill lead L from being attracted by static electricity and sticking to the inner lid 3.

[0031] In addition, a rib-like stopper 3e is formed on the inner surface of the inner lid 3 in the vicinity of the pair of spacers 3c formed on the inner lid 3 so as to protrude from the inner surface. When the inner lid 3 is attached to the case body 2, this stopper 3e is located just before the gap that forms between the case body 2 and the rear end of the inner lid 3, and acts to prevent the refill L stored in the refill storage chamber 2c from leaking out of the refill case.

[0032] 15 to 17 show the structure of the cover member 1. The cover member 1 is formed with a front plate 1a and left and right outer leg plates 1b, and has a U-shaped cross section perpendicular to the longitudinal direction. At the rear of the cover member 1, a rear leg plate 1c is formed to connect the left and right outer leg plates 1b. The front plate 1a Case body 2 The left and right leg plates 2b of the case body 2 are positioned inside the left and right outer leg plates 1b to support the case body 2 so that it can slide in the longitudinal direction. The cover member 1 is configured so that the lid portion 2e of the case body 2 is extended from the tip end side of the cover member 1 by a sliding movement.

[0033] Case support portions 1d are formed along the edges of the left and right outer leg plates 1b at two longitudinal locations, facing each other inward. These slidably support the left and right slide protrusions 2m formed on the leg plates 2b of the case main body 2, thereby slidably supporting the case main body 2 and also functioning to prevent the case main body 2 from coming off the cover member 1. A pair of sliding protrusions 1e are formed facing each other on the inside rear side of the left and right outer leg plates 1b. Rib-shaped click protrusions 2n formed on the case body 2 ride over these protrusions forward, generating a click action when the case body 2 is opened. Furthermore, a pair of click bodies 1f are formed facing each other on the inside of the rear side of the outer leg plate 1b, and when the case main body 2 is slid, these click bodies 1f are overcome rearward by the rib-shaped click protrusions 2n formed on the case main body 2, thereby generating a click action.

[0034] Two sliding bodies 1g are provided facing each other within the outer leg plate 1b at the tip of the cover member 1. When the case body 2 slides and the lid body 2e projects from the tip of the cover member 1, the pair of sliding bodies 1g come into contact with the parallel region 2j1 and the inclined region 2j2 of the guide body 2j formed on the lid body 2e, thereby bending the lid body 2e toward the rear side. Details of this operation will be described later with reference to Figures 4 to 7, etc.

[0035] Furthermore, stoppers 1h are provided facing each other at the tip end of the cover member 1, slightly toward the rear of the sliding body 1g. When the case body 2 slides and the lid body 2e is fully open, the tips of the slide protrusions 2m formed on the leg plates 2b of the case body 2f come into contact with these pair of stoppers 1h (see FIG. 7), thereby stopping the sliding movement of the case body 2. Furthermore, during the sliding operation of pulling the case body 2 back into the cover member 1, the pair of stoppers 1h also play a role in returning the cover body part 2e, which is in a state of being bent backward by contact with the return guide part 2j3 of the guide body 2j, to a state along the longitudinal direction of the case body 2. This operation will be described later with reference to Figures 4 to 7, etc.

[0036] In addition, as shown in Figures 15 and 16, on the inner bottom surface 1m surrounded by the left and right outer leg plates 1b of the cover member 1, rectangular flat protrusions 1n that protrude slightly from the inner bottom surface 1m are intermittently molded along the left and right outer leg plates 1b sides except for the central portion in the longitudinal direction of the inner bottom surface 1m. Furthermore, linear sliding ribs 1p are molded continuously from the flat protrusions 1n arranged in the longitudinal direction toward the tip end of the cover member 1, and the sliding rib 1p on the rear side is molded in a state connecting the front and rear flat protrusions 1n. The flat protrusion 1n and the slide rib 1p are formed to be higher than the inner bottom surface 1m, and the slide rib 1p is formed higher than the flat protrusion 1n.

[0037] As a result, when the case body 2, which is attached to the cover member 1 so as to be slidable along the longitudinal direction, slides, the back surface of the inner lid 3 attached to the case body 2 abuts only against the slide rib 1p and slides along the longitudinal direction. Therefore, the contact area of ​​the inner lid 3 with the cover member 1 is reduced, allowing for smooth sliding.

[0038] Furthermore, a circular depression 1k is formed on the surface of the front plate 1a of the cover member 1 at approximately the center of the cover member 1 as shown in FIG. When sliding the case body 2 relative to the cover member 1, this recess 1k and the linear protrusion group 2r on the case body 2 side can be used to smoothly perform the sliding operation by placing, for example, the thumb on this recess 1k and, for example, the index finger on the linear protrusion group 2r on the case body 2 side and sliding them relative to each other.

[0039] As shown in Figures 1 and 2, when the case main body 2 is housed in the cover member 1, when the front panel 1a of the cover member 1 is viewed from the front (as shown in Figure 1), the closing plate 2g of the lid body portion 2e formed at the tip of the case main body 2 can be seen along the tip recess 1j formed at the tip of the cover member 1. By matching the color of the resin used to mold the case body 2 to a color that is approximately the same as the lead color of the refill L stored in this refill case, the user can also identify the lead color stored in the refill case by the coloring of the closure plate 2g.

[0040] The color density of the resin used to mold the case body 2 can be varied in stages according to the hardness of the lead L, allowing the user to distinguish between colors based on the density of the closure plate 2g. The colors listed here are Munsell color coordinates with a hue of 10 or less and a brightness and saturation of 3 or less. The density is measured on the surface of the part using a densitometer (Sakura Densitometer PDA65, Konishiroku Photo Industry Co., Ltd.). The lead hardness indicates the writing hardness measured according to the method specified in JIS S 6005:2007.

[0041] 3 to 9 mainly explain the opening and closing operation of the lid body portion 2e when the case body 2 is slid relative to the cover member 1. FIG. Figure 3 is a central cross-sectional view (cross-sectional view taken along line aa in Figure 2) of the case body 2 with the inner lid 3 attached housed in the cover member 1, and Figure 4 is a cross-sectional view (cross-sectional view taken along line bb in Figure 2) taken along one of the guide bodies 2j formed on the lid body portion 2e at this time. In the state shown in Figure 4 where the case main body 2 is housed in the cover member 1, the stopper 1h of the cover member 1 abuts against the return guide portion 2j3 of the guide body 2j, and therefore the lid body portion 2e remains closed along the longitudinal direction of the cover member 1.

[0042] Fig. 5 shows a state in which the lid portion 2e of the case main body 2 protrudes from the tip of the cover member 1 by about half the length of the lid portion 2e, and Fig. 6 shows the state of the lid portion 2e at this time. That is, in the initial stage (first half) of protruding the lid portion 2e from the tip of the cover member 1, the sliding body 1g on the cover member 1 side slides in contact with the parallel region 2j1 of the guide body 2j formed on the lid portion 2e. Therefore, the lid portion 2e is extended from the tip of the cover member 1 without being rotated. In the state shown in Figure 6, the sliding body 1g is slightly in contact with the inclined region 2j2 of the guide body 2j, and as a result, the cover body portion 2e is slightly warped toward the back side via the thin-walled portion 2d.

[0043] As mentioned above, in the initial stage of protruding the lid body portion 2e, the lid body portion 2e is extended from the tip of the cover member 1 without any rotational movement being applied to the lid body portion 2e, so that even if the refill case is inadvertently tilted, the refill L inside the case can be prevented from flying out and falling.

[0044] Fig. 7 shows the state in which the lid body part 2e is fully opened after being further extended from the cover member 1. In the latter half of the extension operation of the lid body part 2e from the state shown in Fig. 6 to the state shown in Fig. 7, as the cover member 1 is extended, the sliding body 1g slides along the inclined region 2j2 of the guide body 2j, and therefore the lid body part 2e is suddenly rotated to bend back toward the rear side via the thin-walled part 2d. In the state shown in Figure 7 where the lid body portion 2e is fully open, the tip of the slide protrusion 2m provided along the longitudinal direction of the case main body 2 abuts against the stopper 1h, stopping the extension of the lid body portion 2e.

[0045] 8 and 9 show the external configuration of the refill lead case when the cover body portion 2e is fully open, and FIG. 9 shows the case with a refill lead L housed in it. When the cover body portion 2e is in the fully open state, as shown in FIG. 7, the rear part of the inclined region 2j2 of the guide body 2j contacts the sliding body 1g, and in this state, the cover body portion 2e can be further bent as desired using a fingertip or the like via the thin-walled portion 2d. Therefore, the required number of refills L can be accurately taken out from the refill case.

[0046] On the other hand, when the lid body portion 2e is slid back into the cover member 1 from the fully open state shown in FIGS. 7 to 9, for example, as shown in FIG. 6, the return guide portion 2j3 of the guide body 2j Cover material As a result, the lid body portion 2e, which has been bent toward the rear side, is returned to a state along the longitudinal direction of the case main body 2 and is housed within the cover member 1. In the state shown in FIG. 4 where the lid body portion 2e is completely housed in the cover member 1, the return guide portion 2j3 of the guide body 2j is Cover material The cover body 2e abuts against the stopper 1h on the side 1, and therefore the cover body 2e remains closed.

[0047] Furthermore, when the lid body portion 2e is returned from its fully open state to inside the cover member 1, some of the refills L stored in the case may become pinched between the lid body portion 2e via the thin portion 2d and each leg plate 2b provided on the case portion 2f, which may cause problems such as the refills L being broken. However, as shown in Figure 8, a pair of protective plates 3b formed at the tip of the inner lid 3 are positioned inside each leg plate 2b of the lid body portion 2e and the case portion 2f, thereby avoiding the problem of breaking the refill L mentioned above.

[0048] Next, a refill lead case according to a second embodiment of the present invention will be described with reference to Figures 18 to 28. The basic configuration of the refill lead case according to the second embodiment is the same as that of the refill lead case according to the first embodiment already described, and is configured to include a cover member 1, a case body 2, and an inner lid 3. Therefore, the corresponding main parts are given the same reference numerals, and their explanations are omitted as appropriate. The following mainly describes the unique configuration of the lead refill case of the second embodiment.

[0049] 18 to 20 show the single-item configuration of the case body 2, and in this second embodiment, three inclined protrusions 2u are integrally formed along the upper edges of the left and right leg plates 2b on the case portion 2f side of the case body 2, that is, along the same plane as the so-called fitting recesses 2k. Each of these inclined protrusions 2u is inclined so that the protruding surface becomes lower from the outside to the inside of the case portion 2f. Further, mountain-shaped projections 2v are formed on the inner surfaces of the left and right leg plates 2b so as to face each other, close to the inclined projections 2u on the front and rear end sides of the case portion 2f. Furthermore, on the cover body 2e side of the case body 2, rib-like projections 2w are formed on the inner sides of the left and right leg plates 2b so as to face each other.

[0050] The inclined protrusions 2u, mountain-shaped protrusions 2v, and rib-shaped protrusions 2w all function to prevent breakage of the refills L when the refill case is assembled, for example, by an automatic machine, with a predetermined number of refills L stored in the refill storage chamber 2c of the case body 2. That is, assembling this lead refill case using the aforementioned automated machine involves the steps of inserting a predetermined number of lead refills L into the lead storage chamber 2c of the case body 2, which is placed on a horizontal surface, in the longitudinal direction, and then pressing the inner lid 3 onto the case body 2 in this state, thereby fitting the inner lid 3 to the case body 2. Then, the cover member 1 is attached on top of the inner lid 3 so as to cover it, and the leg plate 2b of the case body 2 is housed inside the outer leg plate 1b of the cover member 1, and the case body 2 is supported slidably relative to the cover member 1, and the product is assembled as a lead refill case.

[0051] Therefore, since the protrusion surface of the inclined protrusion 2u is inclined so as to become lower from the outside to the inside of the case portion 2f, the elongated refill L is prevented from being placed on the same plane as the mating recess 2k, thereby ensuring that all of the refill L inserted is accommodated in the refill storage chamber 2c of the case main body 2.

[0052] In addition, the mountain-shaped protrusions 2v and rib-shaped protrusions 2w function as guide bodies that guide each refill L inserted into the refill storage chamber 2c toward the center of the refill storage chamber 2c so that it does not come into contact with the left and right leg plates 2b. This prevents the tip of the lead L inserted into the lead storage chamber 2c from being pinched by the pair of left and right protective plates 3b formed on the inner lid 3 during the process of fitting the inner lid 3 to the case body 2. This prevents breakage of the lead L and prevents defects from occurring in the lead case.

[0053] 21 to 23 show the individual configuration of the inner lid 3. In the inner lid 3 of this second embodiment, the rib-like stopper 3e protruding from the inner surface of the inner lid 3 is formed with a greater height than the stopper 3e of the inner lid 3 of the first embodiment shown in Figures 12 to 14. That is, while the height of the stopper 3e of the inner lid 3 of the first embodiment is 0.3 mm, the height of the stopper 3e of the inner lid 3 of this second embodiment is increased to 0.5 mm. This improves the effectiveness of preventing lead leakage, which prevents the refill lead L from leaking out from the gap between the case body 2 and the inner lid 3 at the rear end of the refill lead case.

[0054] In addition, in the inner lid 3 of the second embodiment, as shown in Figure 27, which is an enlarged view of the portion surrounded by the dotted line j in Figure 22, a pair of inclined surfaces 3g are provided on the inner surface of the rectangular engaging protrusion 3a. Furthermore, the thickness of each of the pair of left and right protective plates 3b formed on the tip side of the inner lid 3 in the second embodiment is slightly reduced compared to the thickness of each of the protective plates 3b in the first embodiment, thereby reducing the width between the pair of left and right tip ends of the protective plates 3b.

[0055] By providing the pair of slopes 3g on the fitting protrusion 3a, it is possible to more effectively prevent longitudinal positional deviation during assembly of the inner lid 3 to the case body 2. Furthermore, by reducing the width of the tip of the protective plate 3b, it is possible to increase the tolerance for assembly position accuracy.

[0056] Figures 24 to 26 show the individual configuration of the cover member 1, and in this second embodiment of the cover member 1, the opposing slide protrusion 1e and click body 1f formed on the inside of the outer leg plate 1b have been modified in shape so that they each form a gentle slope along the longitudinal direction, compared to the cover member 1 of the first embodiment shown in Figures 15 to 17. 28 is a partially enlarged view showing the state in which the rear surface of the corner of the case body 2 surrounded by the chain line m shown in FIG. 19 is attached to the corner of the cover member 1 surrounded by the chain line n shown in FIG. As shown in Figure 28, the click body 1f formed on the cover member 1 side is formed to form a gentle slope along the longitudinal direction, and the slide protrusion 2n on the case main body 2 side is molded in a trapezoidal shape with a flat surface 2y formed at its top.

[0057] With this configuration, the click body 1f on the cover member 1 side and the slide protrusion 2n on the case main body 2 side are both configured to have a gentle slope, so that when the case main body 2 is slid relative to the cover member 1 and the lid body portion 2e of the case main body 2 begins to protrude and open, the resistance felt during operation can be reduced. In addition, the slide protrusion 2n on the case body 2 side is formed in a trapezoidal shape with a flat surface 2y formed at its top, so that if the refill case is dropped, it can reduce the impact of the fall.

[0058] Next, a refill lead case according to a third embodiment of the present invention will be described with reference to Figures 29 and 30. The basic configuration of the refill lead case according to the third embodiment is the same as that of the refill lead case according to the second embodiment already described, and is configured to include a cover member 1, a case body 2, and an inner lid 3. The cover member 1 shown in Fig. 29, which is used in the lead refill case of the third embodiment, has parts corresponding to the parts of the cover member of the second embodiment shown in Fig. 24, which are designated by the same reference numerals. Also, the inner lid 3 shown in Fig. 30, which is used in the lead refill case of the third embodiment, is a perspective view of the outer surface side of the inner lid 3, and parts corresponding to the parts of the cover member of the second embodiment shown in Figs. 21 to 23, are designated by the same reference numerals. The refill case of the third embodiment differs from the second embodiment in that the sliding rib 1p has been removed from the cover member 1 of the second embodiment, and instead two sliding ribs 3f are formed parallel to each other along the longitudinal direction of the cover member 1 side of the inner lid 3 that is the sliding target, i.e., the outer surface of the inner lid 3.

[0059] In addition, the inner bottom surface 1m of the cover member 1 is formed as a matte finish, and the sliding rib 3f formed on the outer surface of the inner lid 3 slides along the longitudinal direction of the rib 3f on the matte finish applied to the inner bottom surface 1m of the cover member 1. In this case, the matte finish formed on the inner bottom surface 1m of the cover member 1 preferably has an arithmetic mean roughness (Ra) in the range of 5 μm to 50 μm. If this value is less than 5 μm, the surface will resemble a mirror finish, increasing contact resistance and potentially preventing smooth sliding with the inner lid 3. On the other hand, if this value is greater than 50 μm, demolding will be difficult and sufficient mold surface (matte finish) transferability will not be achieved. It is even more preferable that the arithmetic mean roughness (Ra) be in the range of 10 μm to 25 μm, in order to achieve good demolding properties and mold surface transferability.

[0060] The matte finish can be obtained by subjecting the mold surface to etching, sandblasting, polishing other than mirror finishing, etc. Alternatively, the matte finish can be obtained by leaving the mold component surface after electrical discharge machining without polishing. The arithmetic mean roughness (Ra) of the matte finish refers to the arithmetic mean roughness (Ra) defined in JIS B0601: 1982. The surface roughness was measured using a Mitutoyo SJ-301. Furthermore, by setting the force required to separate the cover from the main body to 15N or greater, the cover cannot be easily removed from the main body, preventing parts from falling off.

[0061] In the refill lead cases of the first to third embodiments described above, the inner lid 3 is attached to the case body 2, and the case body 2 is slidably attached to the cover member 1, but the inner lid 3 is not necessarily required and can be omitted. Furthermore, when using the inner lid 3, the inner lid 3 can be connected to the rear side of the case body 2 via a thin connecting band (not shown) to form a single unit. Then, by folding back the thin connecting band and assembling the inner lid 3 to the case body 2, it is possible to reduce the number of parts, which simplifies manufacturing management and allows for the provision of a refill case that can be manufactured at lower costs. [Explanation of symbols]

[0062] 1 Cover member 1a Front plate 1b Outer leg plate 1d Case support 1g sliding body 1h stopper 1k depression 1m Inner bottom surface (pearly surface) 2 Case body 2a Back plate 2b Leg board 2c Refill Storage Chamber 2d Thin section 2e Lid body 2f Case section 2g occlusion plate 2j Guide body 2j1 parallel region 2j2 slope area 2j3 Return guide part 2m slide protrusion 2p protrusion (protrusion to prevent core sticking) 2r projection group 3 Inner lid 3b Protective plate 3D protrusions (protrusions to prevent core sticking) 3f Slide rib L Refill

Claims

[Claim 1] The inner space surrounded by the back plate and the left and right leg plates is used as a replacement lead storage chamber, and a case body is formed with a lid body part on the tip side and a case part on the rear side via a bendable thin part provided near the tip end of the back plate in the longitudinal direction; The case has a front panel and left and right outer leg plates, and the cross section perpendicular to the longitudinal direction is formed in a U-shape. The front panel covers the replacement lead storage chamber on the case body side, and the leg plates of the case body are positioned inside the outer leg plates, and a cover member supports the case body so that it can slide in the longitudinal direction. A guide body is formed along the longitudinal direction on at least one leg plate of the lid body portion, and a sliding body that contacts the guide body is formed on an outer leg plate on the cover member side that covers this leg plate, A refill case characterized in that, as the lid body of the case main body slides out from the tip of the cover member, the sliding contact of the sliding body against the guide body causes a rotational movement that bends the lid body toward the rear side via the thin-walled portion.

Images