Stationery case

Abstract

To provide a stationery case in which the timing of the upward movement of an inner case can be adjusted in response to the opening operation of a cap.SOLUTION: A stationery case 1 includes an outer case 10 provided with an opening 15 through which stationery S can be removed, a cap 20 capable of opening and closing the opening 15 of the outer case 10, an inner case 30 arranged inside the outer case 10 and capable of storing stationery S, a spindle 252 provided in the cap 20, and a shaft hole 16 provided in the outer case 10 and engaging with the spindle 252. The cap 20 is rotatable about the spindle 252 between a closed position where the opening 15 of the outer case 10 is closed and a fully open position where the opening 15 is fully open, and when the cap 20 rotates in the opening direction from the closed position to the fully open position, the rotation region of the cap 20 includes an elevation drive region B where the inner case 30 is elevated as the cap 20 rotates in the opening direction, and a non-elevation drive region where the inner case 30 is not elevated as the cap 20 rotates in the opening direction.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a stationery case. [Background technology]

[0002] 2. Description of the Related Art Conventionally, there have been the following stationery cases such as lead replacement cases for storing lead replacements for mechanical pencils.

[0003] A refill lead case (Patent Document 1) has a pinion formed on the cap and a rack formed on the sliding body, and when the sliding body rises, the cap also moves upward and rotates to open the lead outlet, and the refill lead pressed against the bottom surface of the sliding body protrudes from the top end of the main body.

[0004] A mechanical pencil lead container (Patent Document 2) has a structure in which a pin in the container slides within a long hole in the cap as a protrusion that protrudes from the container body slides, allowing the cap to be opened and closed freely. In the mechanical pencil lead container of Patent Document 2, the cap rotates in the opening direction around a fulcrum, and by moving the container forward and opening the cap, the user can remove a replacement lead from the container. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-212422 [Patent Document 2] Japanese Utility Model Application Publication No. 07-017584 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in these stationery cases, such as lead refill cases or mechanical pencil lead containers, the inner case, which is a sliding body or a storage tube, always rises in conjunction with the opening of the cap. As a result, when the cap is opened, the lead protrudes and comes into contact with fingers, causing problems such as dirtying the fingers.

[0007] An object of the present invention is to provide a stationery case in which the timing of the upward movement of the inner case relative to the opening operation of the cap can be adjusted. [Means for solving the problem]

[0008] In order to solve the above problems, the present invention provides the following. a stationery case comprising an outer case provided with an opening through which stationery can be removed; a cap capable of opening and closing the opening of the outer case; an inner case arranged inside the outer case and capable of containing the stationery; a spindle provided on either the cap or the outer case; and an axial hole provided on the other of the cap or the outer case and engaging with the spindle, wherein the cap is rotatable about the spindle between a closed position in which the opening of the outer case is closed and a fully open position in which the opening is fully open, and when the cap rotates in the opening direction from the closed position to the fully open position, the rotation region of the cap includes an elevation drive region in which the inner case is elevated as the cap rotates in the opening direction, and a non-elevation drive region in which the inner case is not elevated as the cap rotates in the opening direction.

[0009] In the rotation region, the non-rising drive region may be from the closed position to a predetermined intermediate position between the closed position and the fully open position, and the rising drive region may be from the intermediate position to the fully open position.

[0010] A first engaging portion may be provided on either the cap or the inner case, and a first engaged portion that engages with the first engaging portion may be provided on the other, and the first engaging portion and the first engaged portion may abut and be in an engaged state in the upward drive region, and not abut and be in a disengaged state in the non-upward drive region.

[0011] When the cap rotates in the closing direction from the fully open position to the closed position, the rotation region of the cap includes a downward drive region that lowers the inner case as the cap rotates in the closing direction, and the downward drive region may start from the fully open position.

[0012] The device may further include a locking mechanism that restricts rotation of the cap when the cap is in the closed position.

[0013] The locking mechanism may include a regulating protrusion provided in the axial hole and a regulating recess provided on the support shaft that engages with the regulating protrusion, and the support shaft is movable between a first position and a second position within the axial hole, and when the support shaft is in the first position, the regulating protrusion engages with the regulating recess to regulate rotation of the cap, and when the support shaft is in the second position, the regulating protrusion disengages from the regulating recess to allow rotation of the cap. [Effects of the Invention]

[0014] According to the present invention, it is possible to provide a stationery case in which the timing of the upward movement of the inner case relative to the opening operation of the cap can be adjusted. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is a perspective view of a stationery case 1. [Figure 2] 1 is a perspective view of a stationery case 1 seen through an outer case 10. FIG. [Figure 3] 1 is a cross-sectional perspective view of the outer case 10 taken at the center in the left-right direction along a cross section extending vertically and front-to-rear. [Figure 4] FIG. 2 is a perspective view of the cap 20. [Figure 5] 2 is a perspective view of the inner case 30 as seen from the front and bottom. FIG. [Figure 6] FIG. 2 is a perspective view of the inner case 30 as seen from above and behind. [Figure 7] 1 is a top side view of the stationery case 1, showing a state in which the cap 20 is closed and locked by the first locking mechanism 50 and the second locking mechanism 40. FIG. [Figure 8]1 is a top side view of the stationery case 1, showing a state in which the cap 20 is closed but the first locking mechanism 50 and the second locking mechanism 40 have released the lock on the cap 20. FIG. [Figure 9] 1 is a top side view of the stationery case 1, showing the state in which the cap 20 is in an intermediate position between the closed position and the fully open position during the opening operation. FIG. [Figure 10] 10 is a view of the stationery case 1 in the state of FIG. 9 as seen obliquely from the rear. [Figure 11] 1 is a top side view of the stationery case 1, showing the cap 20 in a fully open position. [Figure 12] 1 is a top side view of the stationery case 1, showing the state in which the cap 20 is in a closing operation and is in an intermediate position between the closed position and the fully open position. DETAILED DESCRIPTION OF THE INVENTION

[0016] (1 stationery case) A stationery case 1 according to an embodiment of the present invention will now be described. Fig. 1 is a perspective view of the stationery case 1. The stationery case 1 comprises an outer case 10, a cap 20, and an inner case 30 disposed inside the outer case 10. Fig. 2 is a see-through view of the outer case 10 in the stationery case 1 shown in Fig. 1, showing a state in which a plurality of mechanical pencil leads S are stored as an example of stationery.

[0017] In the following explanation, the side of the stationery case 1 in the longitudinal direction where the cap 20 is attached will be referred to as the top, and the other side will be referred to as the bottom; in the direction perpendicular to the top and bottom directions, the side where the cap 20 opens will be referred to as the front, and the other side will be referred to as the back; and in the direction perpendicular to the top and bottom directions and the front and back directions, the left side when viewed from the front will be referred to as the left, and the right side will be referred to as the right.

[0018] Fig. 3 is a cross-sectional perspective view of the outer case 10, taken at the center in the left-right direction along a cross section extending up-down and front-rear. Fig. 4 is a perspective view of the cap 20, and the front-rear direction shown is the front-rear direction when the cap 20 is closed. Fig. 5 is a perspective view of the inner case 30, seen from the front and bottom. Fig. 6 is a perspective view of the inner case 30, seen from the rear and top.

[0019] (Outer case 10) The outer case 10 includes an outer case front plate 11, an outer case rear plate 12, two outer case side plates 13, and an outer case bottom plate 14. The outer case front plate 11 is disposed in front of the two outer case side plates 13 arranged on the left and right, and the outer case rear plate 12 is disposed behind them, so that the outer case front plate 11, the outer case rear plate 12, and the two outer case side plates 13 form a rectangular tube extending vertically. The outer case bottom plate 14 is disposed slightly above the lower end of the rectangular tube. The outer case 10 is a bottomed rectangular tube member whose cross section perpendicular to the top and bottom sides is approximately rectangular. However, the cross section of the outer case 10 perpendicular to the top and bottom sides does not have to be rectangular, and may be a square, a polygon other than a quadrangle, or a circle.

[0020] The upper end of the outer case 10 is open, and an opening 15 through which the core S can be inserted and removed is formed. The outer case front plate 11 is longer than the outer case rear plate 12 in the vertical direction. The two outer case side plates 13 are each a rectangle (trapezoid) with an oblique upper edge. The upper edges of the two outer case side plates 13 connect the upper end of the outer case rear plate 12 and the upper end of the outer case front plate 11, forming a diagonal straight line that extends upward from the rear to the front. In other words, the opening 15 opens obliquely so that the front is at the top and the rear is at the bottom.

[0021] (First locking mechanism 50: outer case 10 side) 7 is a top side view of the stationery case 1, showing the state in which the cap 20 is closed and locked by the first locking mechanism 50 and the second locking mechanism 40. In FIG. 7, the internal components are shown by dotted lines, and the upper end is partially cut away to show a cross section.

[0022] A shaft hole 16 is formed on the upper and rear sides of each of the two outer case side plates 13. The shaft hole 16 has a shape in which a substantially circular upper shaft hole 16A and a downward-facing C-shaped lower shaft hole 16B partially overlap. The outer contour of the C-shaped lower shaft hole 16B is substantially the same shape as the contour of the circular upper shaft hole 16A, so that the overall shape of the shaft hole 16 is such that two circular holes are partially overlapped vertically. However, this is not limited to this, and the two shaft holes may also overlap in a direction other than vertical, such as left and right.

[0023] Because lower shaft hole 16B is C-shaped, a restricting protrusion 161 that protrudes upward is formed on the lower side of lower shaft hole 16B. The most protruding part of restricting protrusion 161 does not extend further inward than the outer circumference of upper shaft hole 16A and is at a height that roughly contacts the circumference of upper shaft hole 16A. Shaft hole 16 and restricting protrusion 161, together with a support shaft 252 and restricting recess 253 of cap 20 (described later), constitute first locking mechanism 50.

[0024] (Second locking mechanism 40: outer case 10 side) An outer case recessed groove 111 extending laterally is formed on the upper edge of the outer case front plate 11. An outer case ridge 112 extending laterally is formed above the outer case recessed groove 111. The outer case recessed groove 111 and the outer case ridge 112, together with a cap ridge 211 of the cap 20 described below, form the second locking mechanism 40.

[0025] The outer case concave groove 111 and the outer case convex ridge portion 112 are formed on the upper edge of the outer case front plate 11, and therefore can be manufactured using a mold with better formability than when they are formed on the inner surface of the outer case 10, for example.

[0026] FIG. 8 is a top side view of the stationery case 1, similar to FIG. 7, showing the state in which the cap 20 has been unlocked by the first locking mechanism 50 and the second locking mechanism 40 from the closed state of FIG. 7. Similarly to FIG. 7, the internal components are shown in dotted lines in FIG. 8, but the upper end is partially cut away to show a cross section. Similarly to FIG. 7, FIG. 9 is a top side view of the stationery case 1, similar to FIG. 7, showing the state of the cap 20 at a position midway between the closed position and the fully open position during the opening operation. FIG. 10 is a view of the stationery case 1 in the state of FIG. 9, seen obliquely from the rear.

[0027] As shown in FIG. 10, an outer case step 131 is formed on the upper oblique side of the outer case side plate 13.

[0028] As shown in FIGS. 3 and 10, two slits 121 are formed in the upper part of the outer case rear plate 12, cutting out from the upper edge downward (only one is shown in FIG. 3).

[0029] (Cap 20) The cap 20 can open and close the opening 15 by rotating relative to the outer case 10, and also functions as an operating part that moves the inner case 30 up and down to extend and retract the core S. Hereinafter, in the description of the cap 20, the front-to-back, up-to-down directions of the cap 20 when the opening 15 is closed will be described as the front-to-back, up-to-down directions of the cap 20, regardless of whether the cap 20 is in a closed state or an open state.

[0030] The cap 20 includes a cap upper plate 21, two cap side plates 23, a cap rear plate 24, and two cap drive plates 25 extending downward from two positions on the left and right sides of the inner surface of the cap rear plate 24.

[0031] Each of the two cap side plates 23 is a triangular plate member. Like FIG. 7, FIG. 11 is a top side view of the stationery case 1, showing the cap 20 in the fully open position. By making each of the two cap side plates 23 triangular, it becomes easier to grasp the lead S when the cap 20 is fully open as shown in FIG. 11. In the embodiment, each of the two cap side plates 23 is triangular, so that the shape of the cap 20 when viewed from the side (left and right) is triangular, but this is not limited to this and other shapes such as a rectangle may also be used.

[0032] As shown in FIG. 4, cap step portions 231 are formed on the outer edge portions in the left and right direction of each of the diagonally extending lower sides of the two cap side plates 23.

[0033] The two cap drive plates 25 are two plate members extending downward from two locations, left and right, on the lower side of the inner surface of the cap rear plate 24. The two cap drive plates 25 extend downward parallel to the cap side plates 23 from between the two cap side plates 23 that extend parallel to each other.

[0034] When the cap 20 is closed as shown in Figure 7, the cap drive plate 25 has an upper edge 25a that is the upper and front side, a curved edge 25b that is the lower and front side of the upper edge 25a, a lower edge 25c that extends rearward from the curved edge 25b, a lowering cam 254 formed at the rear end of the lower edge 25c, a rear edge 25d that extends upward from the rear end of the lowering cam 254, and a rear convex portion 256 that protrudes rearward above the rear edge 25d.

[0035] 7, when the cap 20 is closed, the upper side 25a is approximately perpendicular to the upper oblique side on which the outer case step 131 of the outer case 10 is formed. When the cap 20 is rotated approximately 90° from the closed position to the fully open position as shown in FIG. 11, the upper side 25a becomes parallel to the outer case step 131, but approximately overlaps with the upper edge of the outer case step 131 and does not protrude outside the outer case 10.

[0036] (First locking mechanism 50: cap 20 side) A support shaft 252 is erected on the outer surfaces of the two cap drive plates 25 in the left-right direction, in front of the rear protrusion 256 (above and rearward of the center of the cap drive plate 25), at a position that does not overlap with the cap side plate 23. The support shaft 252 is a protrusion with a downward C-shape in cross section, and because it is C-shaped, a restricting recess 253 is formed on the underside. The support shaft 252 and the restricting recess 253, together with the shaft hole 16 of the outer case 10 and the restricting protrusion 161, constitute the first locking mechanism 50.

[0037] Restriction recess 253 has a rectangular shape with rounded corners. Meanwhile, restriction protrusion 161 also has a rectangular shape with rounded corners corresponding to restriction recess 253, and restriction protrusion 161 can fit within restriction recess 253. However, without being limited to this, the convex shape of restriction protrusion 161 formed at the bottom of lower shaft hole 16B may have another shape other than that of the embodiment, such as a triangular shape, as long as it does not intrude into the area within the circumference of upper shaft hole 16A and has a height that is approximately tangent to the circumference of upper shaft hole 16A. The concave shape of the restriction recess may also be a shape that allows the restriction protrusion to fit within.

[0038] 7, when the support shaft 252 is positioned in the lower shaft hole 16B of the shaft hole 16 of the outer case 10, the restricting recess 253 of the support shaft 252 fits into the restricting protrusion 161 of the lower shaft hole 16B of the outer case 10. This makes the cap 20 unable to rotate relative to the outer case 10 (rotation is locked), and rotation of the cap 20 relative to the outer case 10 is restricted.

[0039] As shown in Fig. 8, when the support shaft 252 moves into the upper shaft hole 16A of the shaft hole 16 of the outer case 10, the support shaft 252 becomes rotatable within the upper shaft hole 16A. As described above, the most protruding portion of the restricting protrusion 161 does not enter the area within the circumference of the upper shaft hole 16A, and is at a height where it is approximately in contact with the circumference of the upper shaft hole 16A. Therefore, when the support shaft 252 rotates from the state in which the restricting recess 253 faces directly downward to the state shown in Fig. 9 or 11, the restricting protrusion 161 comes into contact with the outer surface of the support shaft 252 other than the restricting recess 253, and the downward movement of the support shaft 252 is restricted.

[0040] (Second locking mechanism 40: cap 20 side) A cap ridge 211 extending a predetermined length in the left-right direction is formed on the lower surface of the front end of the cap upper plate 21. The cap ridge 211, together with the outer case groove 111 and the outer case groove 112, constitutes the second locking mechanism 40. When the cap 20 is further pressed downward in the closed state as shown in FIG. 8, the cap ridge 211 moves over the outer case groove 112 and fits into the outer case groove 111 as shown in FIG. 7. This locks the cap 20 to the outer case 10, preventing the cap 20 from opening accidentally.

[0041] According to this embodiment, the cap 20 is locked to the outer case 10 at the cap ridge 211 provided at the front end of the cap 20, which is the farthest from the support shaft 252 and is prone to rattle relative to the outer case 10. Therefore, when locked, the cap 20 is highly effective in preventing rattle of the outer case 10. Furthermore, with the second locking mechanism 40, the cap 20 and the outer case 10 are directly fitted together, without the inner case 30 being interposed, so that unevenness in fitting due to dimensional tolerances, rattle, etc. can be avoided as much as possible, facilitating quality control.

[0042] (Lifting drive mechanism 60: cap 20 side) Lifting cams 251, which are convex portions protruding in the left-right direction, are formed inside the curved edges 25b on the mutually opposing inner surfaces of the two cap drive plates 25. The lifting cams 251 (first engaging portions) constitute the lifting drive mechanism 60 together with a side opening upper edge 331a (first engaged portion) on the inner periphery of a side opening 331 in the inner case 30, which will be described later.

[0043] As the cap 20 rotates about the support shaft 252 during the opening operation of the cap 20, the lifting cam 251 also rotates about the support shaft 252 and moves upward. As a result, the lifting cam 251 abuts against the upper edge 331a of the side opening and lifts the upper edge 331a, causing the inner case 30 and the lead S to move upward. Because the lifting cam 251 is located on the front and lower side of the cap drive plate 25, away from the support shaft 252, the inner case 30 and the lead S are lifted by a large amount corresponding to the rotation angle of the support shaft 252. This allows the lead S to protrude significantly from the opening 15 of the outer case 10, making it easy to grasp.

[0044] (Downward drive mechanism 70: cap 20 side) The lowering cams 254 are formed at the rear ends of the lower edges 25c of the two cap drive plates 25 located outboard of the lifting cams 251 in the left-right direction, i.e., on the lower and rear sides of the outer periphery of the cap drive plates 25. The lowering cams 254, together with cam abutment steps 332 in the inner case 30 (described later), constitute the lowering drive mechanism 70. In other words, the lowering drive mechanisms 70 are each formed at positions outside the lifting drive mechanisms 60 in the left-right direction. The lowering cams 254 abut against the cam abutment steps 332, and convert the rotation of the cap 20 about the support shaft 252 during the closing operation of the cap 20 into downward movement of the inner case 30 and the core S.

[0045] The rear protrusions 256 are formed on the rear edges of the support shafts 252 of the two cap drive plates 25. The rear protrusions 256 are rotatable within two slits 121 cut out from the upper edge downward in the upper part of the outer case rear plate 12.

[0046] A retaining protrusion 255 is formed on the outer surface of the rear protrusion 256 at a position rearward and upward and not overlapping with the cap side plate 23. When the cap 20 moves from the closed position to the open position, the retaining protrusion 255 does not overlap with the outer case side plate 13 until just before the cap 20 is fully opened. However, once the cap 20 is fully opened, the retaining protrusion 255 enters the inside of the outer case side plate 13 and overcomes and engages with the engaging protrusion 122 ( FIG. 10 ) provided on the inner surface of the outer side of the slit 121 in the left-right direction, thereby maintaining the fully open position of the cap 20.

[0047] (Inner case 30) The inner case 30 is disposed inside the outer case 10 and is capable of housing the core S. The inner case 30 includes an inner case bottom plate 31 that holds the underside of the core S, a pair of inner case drive plates 33 (left and right) that hold the upper part of the core S from the sides, and an inner case support plate 34 that supports the rear side of the core S and extends vertically to connect the inner case bottom plate 31 and the inner case 30 side plates.

[0048] Each of the two inner case drive plates 33 has a side opening 331, which is a substantially rectangular hole in this embodiment. The inner periphery of the side opening 331 has a side opening upper edge 331a provided on the upper side and a side opening lower edge 331b provided on the lower side.

[0049] 6, each of the two inner case drive plates 33 is provided with a cam contact step 332 on the outer side in the left-right direction at the same vertical position as the side opening lower edge 331b on the inner periphery of the side opening. The cam contact step 332 is provided so as to extend further rearward than the side opening lower edge 331b.

[0050] (Lifting drive mechanism 60: inner case 30 side) The upper edge 331a of the side opening serves as an elevation follower, and together with an elevation cam 251 provided on the cap 20, constitutes an elevation drive mechanism 60. When the cap 20 is opened, the cap 20 rotates about the support shaft 252, causing the elevation cam 251 to move upward. As a result, the elevation cam 251 comes into contact with the upper edge 331a of the side opening and lifts the upper edge 331a, causing the inner case 30 and the core S to move upward.

[0051] (Downward drive mechanism 70: inner case 30 side) The cam abutment step 332 serves as a descent follower and constitutes the descent drive mechanism 70 together with the descent cam 254. When the cap 20 starts to rotate around the support shaft 252 during the closing operation of the cap 20, the descent cam 254, which is in contact with the cam abutment step 332, presses the cam abutment step 332 downward. This converts the rotation of the cap 20 around the support shaft 252 into downward movement of the inner case 30 and the core S.

[0052] (Stationery Case 1 Operation) (1) Closed position lock state FIG. 7 shows the cap 20 in the closed position and locked by the first locking mechanism 50 and the second locking mechanism 40.

[0053] At this time, with the cap 20 locked to the outer case 10, the weight of the inner case 30 and the core S causes the bottom surface of a rib extending in the front-to-rear direction provided on the underside of the inner case bottom plate 31 (Figs. 2 and 5) to come into contact with the upper surface of the outer case bottom plate 14 (Fig. 3), restricting downward movement of the inner case 30 relative to the outer case 10. Also, as shown in Fig. 7, a small gap is provided between the lower edge 25c of the cap drive plate 25 and the cam abutment step 332, and when the stationery case 1 is tilted, for example, the lower edge 25c of the cap drive plate 25 comes into contact with the cam abutment step 332, restricting upward movement of the inner case 30 relative to the outer case 10.

[0054] (First locking mechanism 50) The spindle 252 of the cap 20 is positioned in the lower spindle hole 16B of the spindle hole 16 of the outer case 10. At this time, the restricting recess 253 of the spindle 252 is fitted into the restricting protrusion 161 of the lower spindle hole 16B. Therefore, the cap 20 cannot rotate with respect to the outer case 10, and rotation of the cap 20 with respect to the outer case 10 is restricted.

[0055] (Second locking mechanism 40) The cap ridge portion 211 is fitted into the outer case groove 111. Therefore, unless a predetermined force is applied to the cap 20 so that the cap ridge portion 211 rides up onto the outer case ridge portion 112, the cap 20 is prevented from moving upward and from rotating.

[0056] The outer case step portions 131 formed on the upper edges of the inner left-right sides of each of the two outer case side plates 13 of the outer case 10 engage with the cap step portions 231 of the cap 20 shown in Figures 2 and 4. Therefore, rattling of the cap 20 in the left-right direction relative to the outer case 10 can be suppressed when the cap 20 is closed.

[0057] (Lifting drive mechanism 60) The lifting cam 251 is positioned within the side opening 331, but the lifting cam 251 is not pressing against the upper edge 331a of the side opening 331, and the cap 20 is not driving the inner case 30, so it is in a non-lifting driving state.

[0058] (2) Closed position unlocked state When force is applied to the cap 20 from the state shown in FIG. 7 and the cap 20 is lifted slightly upward, the cap 20 is in the closed position, but the locks by the first locking mechanism 50 and the second locking mechanism 40 are released, as shown in FIG. 8.

[0059] (First locking mechanism 50) The support shaft 252 of the cap 20 moves into the upper shaft hole 16A of the shaft hole 16 of the outer case 10, and the engagement between the restricting recess 253 of the support shaft 252 and the restricting protrusion 161 of the lower shaft hole 16B is released. The support shaft 252 becomes rotatable within the upper shaft hole 16A, that is, the cap 20 becomes rotatable relative to the outer case 10.

[0060] (Second locking mechanism 40) The cap ridge portion 211 moves upward, climbing over the outer case ridge portion 112. This releases the restriction of the cap ridge portion 211 by the outer case recessed groove 111, and the cap 20 becomes rotatable relative to the outer case 10.

[0061] The cap step portion 231 of the cap 20 shown in Figures 2 and 4 moves above the outer case step portion 131 formed on the upper edge of the outer case side plate 13, so that the engagement between the cap step portion 231 and the outer case step portion 131 is released.

[0062] (Lifting drive mechanism 60) As in the state shown in Figure 7, the lifting cam 251 is positioned within the side opening 331, but the lifting cam 251 is not pressing against the upper edge 331a of the side opening 331, and the cap 20 is not driving the inner case 30, so it is in a non-lifting drive state.

[0063] (3) During opening operation FIG. 9 shows the cap 20 in a state where it is in an intermediate position between the closed position shown in FIG. 8 and the fully open position during the opening operation of opening the opening 15.

[0064] The rear convex part 256 of the cap driving plate 25 is arranged in the slit 121, so when the cap driving plate 25 rotates in the opening direction around the support shaft 252, it can fall backward in the slit 121, and the rotation of the cap 20 is not hindered.

[0065] (First locking mechanism 50) 9, the restricting recess 253 of the support shaft 252 rotates from a position facing directly downward to a position facing slightly forward. As a result, the restricting protrusion 161 comes into contact with the outer circumferential surface of the support shaft 252 other than the portion where the restricting recess 253 is provided, and the downward movement of the support shaft 252 is restricted.

[0066] (Lifting drive mechanism 60) 8 to 9, the lifting cam 251 is not in contact with the upper edge 331a of the side opening 331 and is not pressing against the upper edge 331a of the side opening 331. Therefore, in the rotation region of the cap 20, the period from FIG. 8 to FIG. 9 is a non-lifting drive region A in which the inner case 30 does not lift as the cap 20 rotates in the opening direction. In the state shown in FIG. 9, the lifting drive mechanism 60 causes the lifting cam 251 to come into contact with the upper edge 331a of the side opening 331.

[0067] (4) Fully open position Figure 11 shows the fully open position where the cap 20 is rotated approximately 90° from the closed position shown in Figure 8. When the cap 20 is rotated approximately 90° from the closed position shown in Figure 8, the cap rear plate 24 becomes approximately perpendicular to the outer case rear plate 12, and the lower edge of the cap rear plate 24 abuts against the outer case rear plate 12 of the outer case 10. This prevents the cap 20 from rotating further in the opening direction, and the cap 20 is in the fully open position.

[0068] The retaining protrusion 255 formed on the outer surface above the rear protrusion 256 does not overlap with the outer case 10 when the cap 20 moves from the closed position to the open state until just before it reaches the fully open position. However, when the cap 20 reaches the fully open position, the retaining protrusion 255 penetrates into the outer case side panel 13 of the outer case 10 and overcomes and engages with the engaging protrusion 122 (Figure 10) provided on the inner surface of the outer side of the slit 121 in the left-right direction, thereby maintaining the fully open position of the cap 20.

[0069] Since the cap side plate 23 of the cap 20 is triangular, when the cap 20 is in the fully open position, a sufficient space for removing the core S can be formed between the cap 20 and the opening 15, making it easy to pick up the core S.

[0070] With the cap 20 maintained in the fully open position, the lifting cam 251 abuts against the upper edge 331a of the side opening, restricting downward movement of the inner case 30 relative to the outer case 10. In addition, the rear edge 25d of the cap drive plate 25 abuts against the cam abutment step 332, restricting upward movement of the inner case 30 relative to the outer case 10. Therefore, a structure can be achieved in which there is little rattling of the inner case 30 inside the outer case 10 with the cap 20 maintained in the fully open position.

[0071] (First locking mechanism 50) 11, the restricting recess 253 of the support shaft 252 rotates from directly below to face sideways. Therefore, the restricting protrusion 161 abuts against the outer surface of the support shaft 252 other than the restricting recess 253, and thus the downward movement of the support shaft 252 is restricted.

[0072] (Lifting drive mechanism 60) When the state of the stationery case 1 changes from Fig. 9 to Fig. 11, the lifting cam 251 of the lifting drive mechanism 60 moves upward as indicated by the arrow in Fig. 11 from the position shown in Fig. 9, indicated by the dashed line. Because the lifting cam 251 abuts the upper edge 331a of the side opening, the upper edge 331a of the side opening also moves upward. This drives the inner case 30 upward, i.e., the lead S housed in the inner case 30 is also driven upward together with the inner case 30, and is advanced above the opening 15 as indicated by the arrow in Fig. 11 from the position shown in Fig. 9, indicated by the dashed line.

[0073] 9 to 11, the lifting cam 251 drives the side opening upper edge 331a of the side opening 331 to lift, and therefore the rotation region of the cap 20 from FIG. 9 to FIG. 11 becomes the lifting drive region B.

[0074] That is, the rotation region of the cap 20, which rotates from the closed position where the opening 15 is closed to the fully open position where the opening 15 is fully opened, has a non-rising drive region A where the inner case 30 is not raised in association with the rotation of the cap 20, and a rising drive region B where the inner case 30 is raised in association with the rotation of the cap 20. In the embodiment, the rotation region from the closed position shown in Fig. 8, where the cap 20 starts to be opened, to a predetermined position shown in Fig. 9 is the non-rising drive region A, and the subsequent rotation region from the predetermined position shown in Fig. 9 to the fully open position shown in Fig. 11 is the rising drive region B.

[0075] (5) During closing operation FIG. 12 shows the cap 20 in the closing operation from the fully open position shown in FIG. 11 to the opening 15 .

[0076] (First locking mechanism 50) 12, the restricting recess 253 of the support shaft 252 does not face directly downward, but faces slightly forward. Therefore, the restricting protrusion 161 abuts against the outer surface of the support shaft 252 other than the restricting recess 253, and thus the downward movement of the support shaft 252 is restricted.

[0077] (Downward drive mechanism 70) 11, the lowering cam 254 and the rear edge 25d of the cap drive plate 25 continuing from the lowering cam 254 abut against the cam abutment step 332. When the cap 20 is closed in this state, the lowering cam 254 presses against the cam abutment step 332. This causes the entire inner case 30 and the core S to move downward.

[0078] As the cap 20 is further closed, the lowering cam 254 further rotates around the support shaft 252, moving rearward on the cam abutment step 332 and pressing the cam abutment step 332 downward, causing the entire inner case 30 and the core S to move further downward, resulting in the state shown in Figure 12.

[0079] When the lowering cam 254 moves further and passes the rear end of the cam abutment step 332, the lowering drive mechanism 70 stops functioning, but the inner case 30 moves downward due to its own weight or the pressure applied by the raising cam 251 to the inner surface of the side opening 331. The cap 20 then moves to the closed position and unlocked state shown in Figure 8. Next, when the cap 20 is pressed downward, the support shaft 252 moves into the restricting recess 253, and the cap ridge 211 also moves to the outer case groove 111, resulting in the closed position and locked state shown in Figure 7.

[0080] (Effects of the stationery case 1 of the present invention) (1) As described above, according to the stationery case 1 of the present invention, the rotation region of the cap 20 includes an upward drive region B in which the inner case 30 is raised as the cap 20 rotates in the opening direction, and a non-upward drive region A in which the inner case 30 is not raised as the cap 20 rotates in the opening direction. The timing of the upward movement of the inner case 30 can be adjusted by changing the positions (order) and lengths of the non-upward drive region A and the upward drive region B in the rotation region of the cap 20. Note that the positions (order) and lengths of the non-upward drive region A and the upward drive region B can be adjusted by, for example, the shape of the side opening 331 or the shape of the lifting cam 251.

[0081] (2) In the embodiment, the non-rising drive region A is the region in the rotation region of the cap 20 from the closed position to a predetermined intermediate position between the closed position and the fully open position, and the rising drive region B is the region from the intermediate position to the fully open position. That is, the non-rising drive region A, in which the inner case 30 is not raised as the cap 20 rotates in the opening direction, is in the initial stage of the operation of opening the cap 20. The rising drive region B, in which the inner case 30 is raised as the cap 20 rotates in the opening direction, follows the non-rising drive region A. Therefore, the initial stage after opening the cap 20 is in the non-rising drive region A, in which the lead S does not rise. After that, the rising drive region B is reached, in which the lead S rises. Therefore, because the lead S does not rise immediately after opening the cap 20, there is little chance that a finger will come into contact with the lead S protruding from the outer case 10, making it easy to use.

[0082] (3) The cap is provided with a lifting cam 251 (first engaging portion), and the inner case 30 is provided with a side opening upper edge 331a (first engaged portion) that engages with the lifting cam 251. The cap 20 is initially opened in a disengaged state where the lifting cam 251 and the side opening upper edge 331a do not come into contact with each other, and is then configured to engage with the lifting cam 251 and the side opening upper edge 331a. This allows the lead S to not rise in the non-lifting drive region A during the initial opening of the cap 20. The lead S then rises in the lifting drive region B, allowing the lead S to rise.

[0083] (4) According to the embodiment, a lowering drive mechanism 70 is provided that lowers the inner case 30 as the cap 20 rotates in the closing direction. Unlike the embodiment, this does not include a lowering drive mechanism that lowers the inner case as the cap rotates in the closing direction. If, for example, the core is lowered solely by the force of gravity of the inner case and the core when closing the cap, there may be insufficient downward force to counteract the frictional forces generated between the inner case, which is lifting the core, and the inner wall surface of the outer case, and the core may not sink smoothly. In this case, the core does not sink immediately even after the cap begins to close, making it easy for fingers to come into contact with the core, resulting in problems such as core breakage and finger stains, and also causing problems with poor movement and reducing quality.

[0084] However, in this embodiment, a descent drive mechanism 70 is provided that lowers the inner case 30 as the cap 20 rotates in the closing direction, so the descent of the inner case 30 begins at the same time as the cap 20 begins to close from the fully open position. Therefore, during the closing operation of the cap 20, the lead S begins to sink reliably at the same time as the cap 20 begins to close, making it less likely for fingers to come into contact with the lead S, making it possible to provide a high-quality stationery case 1 that is easy to use and less likely to break the lead S.

[0085] As in the embodiment, by providing the lifting drive mechanism 60 and the lowering drive mechanism 70 at different positions, the movements when lifting the inner case 30 and the movements when lowering the inner case 30 can be adjusted to be different.

[0086] (5) In the embodiment, a first locking mechanism 50 is provided that restricts rotation of the cap 20 when the cap 20 is in the closed position. The first locking mechanism 50 has a restricting protrusion 161 provided in the shaft hole 16 and a restricting recess 253 provided in the support shaft 252 that engages with the restricting protrusion 161. The shape of the shaft hole 16 is such that two circular upper and lower shaft holes 16A and 16B overlap each other. The support shaft 252 is movable within the shaft hole 16 between a first position within the lower shaft hole 16B and a second position within the upper shaft hole 16A. When the support shaft 252 is within the lower shaft hole 16B (first position), the regulating protrusion 161 engages with the regulating recess 253, thereby entering a locked state that restricts rotation of the cap. When the support shaft 252 is within the upper shaft hole 16A (second position), the regulating protrusion 161 disengages from the regulating recess 253, thereby entering an unlocked state that allows the cap 20 to rotate.

[0087] That is, locking and unlocking the first locking mechanism 50 requires little effort because it is a simple operation of simply moving the cap 20 up and down. Furthermore, when the cap 20 is open, the spindle 252 located in the upper shaft hole 16A does not move into the lower shaft hole 16B having the restricting protrusion 161, so the rotation of the spindle 252 is not locked.

[0088] (6) Unlike the embodiment, in a stationery case that does not have a lead lifting mechanism, it is necessary to tilt the stationery case appropriately when removing the lead, which is time-consuming. Furthermore, if the case is not tilted properly, the lead may come out too far, and the lead may be lost or broken.

[0089] However, the stationery case 1 of this embodiment has a lifting drive mechanism 60 for the lead S. This lifting drive mechanism 60 converts the rotation of the cap 20 into up and down movement of the inner case 30, and therefore the lead S, and as the cap 20, which serves as the operating part, rotates, the lead S protrudes from and retracts into the outer case 10. When the cap 20 is opened, the lead S protrudes above the outer case 10, so the lead S can be grasped directly without tilting the outer case 10, making it easy to remove the lead S without worrying about losing or breaking it. Furthermore, because the cap 20 cannot be removed from the outer case 10, there is no need to worry about losing the cap 20.

[0090] (7) If the cap of a stationery case is accidentally opened, the lead may fall out of the case, or lead powder accumulated inside the stationery case may leak out, potentially contaminating the surrounding area. However, in this embodiment, two locking mechanisms, a first locking mechanism 50 and a second locking mechanism 40, are provided. Therefore, the possibility of the cap 20 accidentally opening is low.

[0091] (8) Furthermore, the first locking mechanism 50 and the second locking mechanism 40 are formed by being provided in the outer case 10, the cap 20, or the inner case 30, and there is no need to add any other parts, thereby reducing the required costs.

[0092] (9) In the stationery case 1 of the embodiment, the cap 20 is the operating part that moves the inner case 30 up and down to make the core S appear and disappear, so the operation method is intuitively easy to understand compared to when the operating part is a part separate from the cap.

[0093] (Variations) In the embodiment, the lifting drive mechanism 60 that moves the inner case 30 up and down has been described using the lifting cam 251 provided on the cap 20 and the side openings 331 provided on the inner case 30 as examples. The lifting cams 251 are provided on both side surfaces of the cap 20, and the side openings 331 are provided on both side surfaces of the inner case 30, i.e., two of each. The side openings 331 are rectangular.

[0094] However, this is not limiting. For example, the lifting drive mechanism 60 may have a structure in which a rack and pinion engage. An opening that engages with a cam may be provided in the cap, and a cam may be provided in the inner case. The opening and cam may be provided on only one side. There may also be three or more openings and cams, and the lead S may be extended and retracted via multiple cams. When multiple cams are provided, the cams do not have to be the same shape. For example, the two cams provided on each side of the stationery case 1 may have different shapes. The shape of the side opening 331 is not limited to a rectangle, but may be a square or even a non-rectangular shape.

[0095] In the embodiment, the rotation regions of the cap 20 are such that the first stage in the opening operation of the cap 20 is a non-rising drive region and the subsequent stage is a rising drive region, but are not limited to this. For example, the first stage in the opening operation of the cap 20 may be a rising drive region, followed by a non-rising drive region, and finally by another rising drive region.

[0096] In the embodiment, the support shaft 252 provided on the cap 20 rotates within the shaft hole 16 formed in the outer case 10, but this is not limited to this, and the support shaft may be formed in the outer case by providing a shaft hole in the cap.

[0097] In the embodiment, the cap 20 is an operating part that moves the inner case 30 up and down to make the core appear and disappear, but for example, the cap 20 may be configured to open and close by moving the inner case up and down using an operating part that is integral with the inner case 30 and exposed to the outside of the outer case. [Explanation of symbols]

[0098] A Non-rising driving region B. Upward driving region S core (stationery) 1 Stationery Case 10 Outer case 15 Opening 20 Caps 30 Inner case 40 Second locking mechanism 211 Cap ridge 111 Outer case groove 112 outer case ridge 50 First locking mechanism 16 Shaft hole 16A Upper shaft hole 16B Lower shaft hole 161 Regulating convex part 252 Spindle 253 Regulatory recess 60 Lifting drive mechanism 251 Lifting cam (first engagement part) 331a Upper side of side opening (first engaged part) 70 Lowering drive mechanism 254 Descending Cam 332 Cam contact step

Claims

1. An outer case with an opening through which stationery can be removed; a cap that can open and close the opening of the outer case; an inner case disposed inside the outer case and capable of housing the stationery; a support shaft provided on either the cap or the outer case; a shaft hole provided in the other of the cap or the outer case and engaged with the support shaft, the cap is rotatable about the support shaft between a closed position where the opening of the outer case is closed and a fully open position where the opening is fully opened, When the cap rotates in an opening direction from the closed position to the fully open position, The rotation area of ​​the cap is a lifting drive region that lifts the inner case in accordance with the rotation of the cap in the opening direction; a non-lifting drive region in which the inner case is not lifted in association with the rotation of the cap in the opening direction, Stationery case.

2. In the rotating region, The non-lifting drive region is from the closed position to a predetermined intermediate position between the closed position and the fully open position, The lifting drive region is from the intermediate position to the fully open position. The stationery case according to claim 1.

3. a first engaging portion is provided on one of the cap and the inner case, and a first engaged portion that engages with the first engaging portion is provided on the other; The first engaging portion and the first engaged portion are In the lifting drive region, the contact is made to be in an engaged state, and in the non-lifting drive region, the contact is not made to be in an engaged state. The stationery case according to claim 1 or 2.

4. When the cap rotates in a closing direction from the fully open position to the closed position, The rotation area of ​​the cap is a descending drive region that descends the inner case as the cap rotates in the closing direction, The downward drive region starts from the fully open position. The stationery case according to claim 1 or 2.

5. a locking mechanism that restricts rotation of the cap when the cap is in the closed position; The stationery case according to claim 1 or 2.

6. The locking mechanism is a restricting protrusion provided in the shaft hole; a restricting recess provided on the support shaft and adapted to engage with the restricting protrusion, The support shaft is movable within the shaft hole between a first position and a second position, When the support shaft is in the first position, the restricting protrusion is engaged with the restricting recess to restrict rotation of the cap, a first locking mechanism that allows the cap to rotate by disengaging the restricting protrusion from the restricting recess when the support shaft is in the second position; The stationery case according to claim 5.

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