Refill case

Abstract

This product provides a refill case that prevents the lid from getting lost, prevents the lid from opening accidentally, and allows for one-handed operation. [Solution] The inner cylinder 2 consists of an inner cylinder lower half 3 and an inner cylinder upper half 8. The inner cylinder lower half 3 is formed in a bottomed cylindrical shape with an upper opening 5 that forms a replacement core housing 4 and has a drive element 12 protruding from it. The inner cylinder upper half 8 forms a sliding piece 9 and the front of the inner wall 10 of the sliding piece 9, which communicates with the opening 5 of the inner cylinder lower half 3, forms the inner cylinder opening 11. The outer cylinder 18 consists of an outer cylinder lower half 19 and an outer cylinder upper half 33. The lower half 19 is formed in the shape of a bottomed cylindrical body with an upper opening 24 and has a cam groove 21, the upper half 33 of the outer cylinder forms a housing piece 34 and the front of the inner wall 36 of the housing piece 34, which communicates with the opening 24 of the lower half 19 of the outer cylinder, forms the outer cylinder opening 37, and the biasing part 16 is disposed in the gap between the inner bottom 25 of the lower half 19 of the outer cylinder and the outer bottom 6 of the lower half 3 of the inner cylinder in order to bias the inner cylinder 2 upward.

Description

Technical Field

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

Background Art

[0002] Lead cases for accommodating mechanical pencil refills come in various forms, and conventional lead cases are broadly classified into two main types based on opening and closing control methods: those that open and close with a separate lid, and those that control opening and closing via friction or fitting of concave and convex portions.

[0003] The weakness of the type that opens and closes with a separate lid is the risk of losing the lid, and the weakness of the type that controls opening and closing via friction or fitting of concave and convex portions includes wear of the components.

[0004] In addition, cylindrical refill lead cases have gained support from some users due to their portability, and most cases of this type are composed of a main body cylinder and a separate lid.

[0005] However, as described above, lids for stationery items are easily lost, and the loss of their function makes it difficult to use the items for a long period of time.

[0006] A technology that does not use a separate lid even for such a highly portable cylindrical refill lead case is disclosed in, for example, Patent Document 1. This technology is configured by a cylindrical outer cylinder having an opening extending a predetermined length in the axial direction on the peripheral side surface of one end portion, and a cylindrical inner cylinder rotatably accommodated in the outer cylinder, and opens and closes the lead take-out port by a rotation operation.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Summary of Invention

Problems to be Solved by the Invention

[0008] Indeed, the refill case described in Patent Document 1 is superior in that the refill opening can be opened and closed by a rotating operation, eliminating the need for a separate lid and thus preventing the lid from being lost.

[0009] However, the lead replacement case disclosed in Patent Document 1 mentioned above requires both hands to open and close, and wear of parts over time due to the rotational operation is unavoidable, and there is also the problem that the lead dispenser may open unintentionally when carried.

[0010] The present invention aims to provide a refill case that prevents the lid from being lost, prevents the lid from opening accidentally, and allows for one-handed operation.

[0011] [Means for solving the problem]

[0012] To achieve the above objectives, the present invention provides the following technologies.

[0013] The invention according to claim 1 comprises an inner cylinder, a driven element protruding from the inner cylinder, and an outer cylinder that can house the inner cylinder and the biasing part inside, the inner cylinder comprising a lower half and an upper half, the lower half of the inner cylinder being formed in a bottomed cylindrical shape with an upward opening that has a replacement core housing section that can house the lower part of the replacement core, and the outer water from the circumferential surface flatThe drive element is provided protruding in the direction, the upper half of the inner cylinder forms a sliding piece extending upward from a part of the upper end of the lower half of the inner cylinder, and the front of the inner wall of the sliding piece, which communicates with the opening of the lower half of the inner cylinder, forms the inner cylinder opening, the outer cylinder consists of an outer cylinder lower half and an outer cylinder upper half, the lower half of the outer cylinder is formed in the shape of a bottomed cylinder with an upward opening, and a cam groove is formed through the circumferential wall for guiding the drive element that allows the inner cylinder to rotate within the outer cylinder from the outside, and the upper half of the outer cylinder forms a housing piece extending upward from a part of the upper end of the lower half of the outer cylinder The outer cylinder opening is formed at the front of the inner wall of the housing piece that communicates with the opening in the lower half of the outer cylinder, the biasing portion is disposed in the gap between the inner bottom and outer bottom of the lower half of the outer cylinder to bias the inner cylinder upward, the housing piece opens so that the upper part of the replacement core is exposed and can be discharged from the inner cylinder opening through the outer cylinder opening when the inner cylinder rotates and overlaps with the sliding piece, and the housing piece and the sliding piece close the region consisting of the inner cylinder opening and the outer cylinder opening when separated from the sliding piece. Refill We intend to provide a case.

[0014] The invention according to claim 2 provides a replacement lead case according to claim 1, characterized in that the biasing portion consists of a compression spring.

[0015] The invention according to claim 3 is characterized in that the lower half of the inner cylinder consists of a lower base and a replacement lead housing, the lower base is formed to be solid in the vertical direction for approximately half of the lower half of the inner cylinder in a plan view, and the other approximately half is formed as the replacement lead housing, and the sliding piece of the upper half of the inner cylinder is formed by extending the lower base upward as is, thus providing the replacement lead case according to claim 2.

[0016] The invention according to claim 4 is characterized in that the inner wall of the housing piece is formed in a concave shape so that the entire outer surface of the sliding piece is surrounded by the inner wall of the housing piece at a position where the housing piece overlaps with the sliding piece due to the rotation of the inner cylinder.

[0017] The invention according to claim 5 is characterized in that the cam groove forms a substantially L-shaped through groove that extends over substantially half the circumference of the circumferential side wall of the lower half of the outer cylinder at an intermediate point in the longitudinal direction of the lower half of the outer cylinder, and is intended to provide a replacement lead case according to any one of claims 1 to 4. [Effects of the Invention]

[0018] According to the invention described in claim 1, the device comprises an inner cylinder, a driven element protruding from the inner cylinder, and an outer cylinder that can house the inner cylinder and the biasing part inside. The inner cylinder consists of a lower half and an upper half. The lower half is formed as a bottomed cylindrical shape with an upward opening, which includes a replacement core housing section that can house the lower part of the replacement core, and also has a circumferential surface that allows for external water protection. flat A follower is provided in the direction, the upper half of the inner cylinder forms a sliding piece extending upward from a part of the upper end of the lower half of the inner cylinder, and the front of the inner wall of the sliding piece, which communicates with the opening of the lower half of the inner cylinder, serves as the inner cylinder opening, the outer cylinder consists of an outer cylinder lower half and an outer cylinder upper half, the lower half of the outer cylinder is formed as a bottomed cylinder with an upward opening, and a cam groove is formed through the circumferential wall for guiding a follower that allows the inner cylinder to rotate freely within the outer cylinder from the outside, the upper half of the outer cylinder forms a housing piece extending upward from a part of the upper end of the lower half of the outer cylinder, and the front of the inner wall of the housing piece, which communicates with the opening of the lower half of the outer cylinder, serves as the outer cylinder opening, and the biasing part is The housing piece is positioned in the gap between the inner bottom and outer bottom of the lower half of the outer cylinder to bias the inner cylinder upward. The housing piece opens so that the upper part of the replacement core is exposed and can be discharged from the inner cylinder opening through the outer cylinder opening when it overlaps with the sliding piece due to the rotation of the inner cylinder. When it is separated from the sliding piece, the housing piece and the sliding piece close the area consisting of the inner cylinder opening and the outer cylinder opening. As a result, since a detachable lid is not used, the possibility of loss of function due to the loss of parts is eliminated, and the possibility of loss of function due to wear can be eliminated by opening and closing control by the cam groove and driven element.

[0019] According to the invention described in claim 2, since the biasing part consists of a compression spring, the inner cylinder can be consistently and stably biased upward inside the outer cylinder with a simple configuration.

[0020] According to the invention described in claim 3, the lower half of the inner cylinder consists of a lower base portion and a refill accommodating portion, the lower base portion is formed to be solid in the vertical direction for approximately half of the lower half of the inner cylinder in plan view, the other approximate half is formed as the refill accommodating portion, and the sliding piece of the upper half of the inner cylinder is formed by extending the lower base portion directly upward, whereby the refill accommodated in the refill accommodating portion can be easily manually taken out from the inner cylinder opening.

[0021] According to the invention described in claim 4, the inner side wall of the accommodating piece is formed in a concave shape so that the entire outer side of the sliding piece is surrounded by the inner side wall of the accommodating piece at the position where the accommodating piece overlaps the sliding piece as the inner cylinder rotates, whereby the inner cylinder can be smoothly rotated within the outer cylinder.

[0022] According to the invention described in claim 5, the cam groove is formed as a substantially V-shaped continuous through groove extending over approximately half the circumference of the peripheral side wall of the lower half of the outer cylinder at an intermediate portion in the length direction of the lower half of the outer cylinder, such that when the follower is at the start point position or end point position of the V-shaped cam groove, the open / closed lid state is maintained unless the follower is pushed down against the biasing force of the biasing portion, whereby unintended opening and closing of the lid can be prevented. Brief Description of the Drawings

[0023] [Figure 1] (a) is a perspective view showing the refill case according to the present embodiment with the lid closed, and (b) is a perspective view showing the lid in an open state. [Figure 2] (a) is a perspective view of the inner cylinder, and (b) is a perspective see-through view. [Figure 3] (a) is a perspective view of the outer cylinder, and (b) is an exploded perspective see-through view. [Figure 4] It is a cross-sectional view of the refill case according to the present embodiment. [Figure 5] (a) is a perspective view showing a refill case according to a modified example of the present embodiment with the lid closed, and (b) is a perspective view showing the lid in an open state. Modes for Carrying Out the Invention

[0024] The gist of the refill case according to the embodiment of the present invention is that it consists of an inner cylinder, a driven element protruding from the inner cylinder, and an outer cylinder that can house the inner cylinder and the biasing part inside, the inner cylinder consists of a lower half and an upper half, the lower half of the inner cylinder is formed as a bottomed cylindrical shape with an upward opening that forms a refill housing part that can house the lower part of the refill, and the outer water from the circumferential surface flat A follower is provided in the direction, the upper half of the inner cylinder forms a sliding piece extending upward from a part of the upper end of the lower half of the inner cylinder, and the front of the inner wall of the sliding piece, which communicates with the opening of the lower half of the inner cylinder, forms the inner cylinder opening, the outer cylinder consists of a lower half and an upper half, the lower half of the outer cylinder is formed as a bottomed cylinder with an upward opening, and a cam groove is formed through the circumferential wall to guide the follower that allows the inner cylinder to rotate freely within the outer cylinder from the outside, the upper half of the outer cylinder forms a housing piece extending upward from a part of the upper end of the lower half of the outer cylinder The design features an outer cylinder opening at the front of the inner wall of the housing piece that communicates with the opening in the lower half of the outer cylinder, a biasing part positioned in the gap between the inner bottom and outer bottom of the lower half of the outer cylinder to bias the inner cylinder upward, and a housing piece that opens when it overlaps with the sliding piece by the rotation of the inner cylinder, exposing the upper part of the replacement lead so that it can be discharged from the inner cylinder opening through the outer cylinder opening, and then closes the area consisting of the inner cylinder opening and the outer cylinder opening with the housing piece and the sliding piece when it is separated from the sliding piece. In other words, since a detachable lid is not used, the possibility of loss of function due to the loss of parts is eliminated, and the possibility of loss of function due to wear is eliminated by opening and closing control by a cam groove and a driven element, thereby providing a replacement lead case.

[0025] Hereinafter, an embodiment and modified example of the refill case 1 according to the present invention will be described with reference to the drawings. In this description, structures and parts that are identical or symmetrical on the left and right sides will, in principle, be denoted by the same reference numerals, and only one side will be described, while the other side will be omitted as appropriate.

[0026] In this embodiment, the side of the refill case 1 with the refill housing portion 4 of the inner cylinder 2 is referred to as the front side, and the side with the sliding piece 9 of the inner cylinder 2 and the housing piece 34 of the outer cylinder 18 is referred to as the rear side. In other words, the opening side of the refill case 1 is referred to as the front side, and the side directly opposite it is referred to as the rear side.

[0027] As shown in Figures 1(a)(b) to 4, the replacement lead case 1 according to an embodiment of the present invention consists of an inner cylinder 2, a follower 12 protruding from the inner cylinder 2, and an outer cylinder 18 that can accommodate the inner cylinder 2 and the biasing part 16 inside. The inner cylinder 2 consists of a lower half 3 and an upper half 8. The lower half 3 is formed as a bottomed cylindrical shape with an upper opening 5 that forms a replacement lead housing part 4 that can accommodate the lower part of the replacement lead R, and also allows water to enter from the circumferential side. flat A follower 12 is provided protruding in the direction, the upper half of the inner cylinder 8 forms a sliding piece 9 extending upward from a part of the upper end of the lower half of the inner cylinder 3, and the front of the inner wall 10 of the sliding piece 9, which communicates with the opening 5 of the lower half of the inner cylinder 3, forms the inner cylinder opening 11, the outer cylinder 18 consists of an outer cylinder lower half 19 and an outer cylinder upper half 33, the lower half of the outer cylinder 19 is formed as a bottomed cylinder with an upper opening 24, and a cam groove 21 is formed through the circumferential wall 20 for guiding the follower 12 that allows the inner cylinder 2 to rotate freely within the outer cylinder 18 from the outside, the upper half of the outer cylinder 33 has a housing piece 34 extending upward from a part of the upper end of the lower half of the outer cylinder 19 The inner wall 36 of the housing piece 34, which forms the opening 24 of the lower half of the outer cylinder 19, has an outer cylinder opening 37 at its front, and the biasing part 16 is positioned in the gap between the inner bottom 25 of the lower half of the outer cylinder 19 and the outer bottom 6 of the lower half of the inner cylinder 3 in order to bias the inner cylinder 2 upward. The housing piece 34 is formed so that when the inner cylinder 2 rotates, it overlaps with the sliding piece 9, and the upper part of the replacement core R is exposed so that it can be discharged from the inner cylinder opening 11 through the outer cylinder opening 37. When the housing piece 34 is separated from the sliding piece 9, it is formed so that the housing piece 34 and the sliding piece 9 close the area consisting of the inner cylinder opening 11 and the outer cylinder opening 37.

[0028] In the refill case 1 formed in this manner, the drive 12 shown in Figure 1(a), which is in a closed state when the housing piece 34 of the outer cylinder 18 is separated from the sliding piece 9 of the inner cylinder 2, is pushed downward against the biasing part 16 inside the outer cylinder 18 that biases the inner cylinder 2 upward, thereby pushing the inner cylinder 2 down together with it. Furthermore, by moving the drive 12 along the cam groove 21 over approximately half the circumference of the circumferential side wall 20, the lid is opened as shown in Figure 1(b), when the housing piece 34 overlaps with the sliding piece 9, making it possible to remove the refill R from inside.

[0029] Therefore, since a detachable lid is not used, the possibility of loss of function due to the loss of parts is eliminated, and the possibility of loss of function due to wear can also be eliminated by opening and closing control by the cam groove 21 and the drive element 12.

[0030] The following provides a detailed description of the structure of each section.

[0031] As shown in Figures 2(a) and 2(b), the inner cylinder 2 is made of a synthetic resin material consisting of a lower half 3 and an upper half 8, both of which are longer than the length of the replacement lead R. The lower half 3, which is formed in a roughly cylindrical shape, is further made of a lower base 7 and a replacement lead housing 4. The lower base 7 is formed vertically in a solid semicircular region, which is roughly half the circular lower half 3 in plan view, and the other roughly half semicircular region in plan view is formed as a bottomed cylindrical replacement lead housing 4 with an upper opening 5 that has a dome-shaped space into which the lower part of the replacement lead R can be freely accommodated.

[0032] Also, water from the circumferential surface of the lower base 7 flat In the direction of movement, a follower 12 made of synthetic resin material, which has a T-shape in cross-section and a mushroom-like appearance, is integrally formed with a cylindrical rod-shaped guide base 14 and a disc-shaped operating part 13 having an outer diameter larger than the outer diameter of the guide base 14. The guide base 14 is fitted into a follower mounting hole 40 drilled in the circumferential surface of the lower half base 7, which has an inner diameter approximating the outer diameter of the guide base 14, using adhesive in addition to the guide base 12.

[0033] Furthermore, the upper half of the inner cylinder 8 extends upward from the lower base 7, which is part of the upper end of the lower half of the inner cylinder 3, and forms a solid sliding piece 9 that is semicircular in plan view and of a predetermined length, similar to the lower base 7. The front of the inner wall 10 of the sliding piece 9, which communicates with the opening 5 of the replacement core housing portion 4 of the lower half of the inner cylinder 3, is formed as the inner cylinder opening 11.

[0034] Furthermore, the shape and material of the inner cylinder 2 and the drive element 12 are not limited to this embodiment. Various modifications and changes are possible within the scope of the gist of the present invention, such as using a metal material or connecting the drive element 12 to the lower half of the inner cylinder 3 by screwing it in.

[0035] Furthermore, as shown in Figure 4, the biasing unit 16 consists of a compression spring 16a of a predetermined length and is positioned in the gap between the inner bottom portion 25 of the lower half portion 19 of the outer cylinder (described later) and the outer bottom portion 6 of the lower half portion 3 of the inner cylinder, thereby biasing the inner cylinder 2 upward within the outer cylinder 18.

[0036] Furthermore, the biasing portion 16 is not limited to a compression spring 16a, and various modifications and changes are possible within the scope of the gist of the present invention, as long as the inner cylinder 2 is biased upward within the outer cylinder 18.

[0037] Next, as shown in Figures 3(a) and 3(b), the outer cylinder 18 is formed from a synthetic resin material consisting of a lower outer cylinder portion 19 and an upper outer cylinder portion 33, which are longer overall than the length of the replacement core R and slightly longer than the inner cylinder 2. The lower outer cylinder portion 19, which is formed in a cylindrical shape with an upper opening 24, is formed in a bottomed cylindrical shape with an inner diameter that approximates the outer diameter of the inner cylinder 2 and is slightly larger, and the lower inner cylinder portion 3 of the inner cylinder 2 is housed therein so that it can rotate up and down freely.

[0038] Furthermore, as shown in Figure 4, a biasing portion 16 is provided in the gap between the inner bottom portion 25 of the lower half portion 19 of the outer cylinder and the outer bottom portion 6 of the lower half portion 3 of the inner cylinder in order to bias the inner cylinder 2 upward. In this embodiment, the bottom of the lower half portion 19 of the outer cylinder is formed so that the inner cylinder 2 can be easily housed inside the outer cylinder 18 by a detachable bottom cover piece 27.

[0039] Specifically, as shown in Figures 3(b) and 4, the lower cover piece 27 consists of a disc-shaped lower cover surface portion 28 with the same diameter as the outer diameter of the outer cylinder 18, and a cylindrical biasing portion housing portion 30 that is erected from the back surface of the lower cover surface portion 28 and has an outer diameter approximating the inner diameter of the outer cylinder. A straight slot 29 is formed on the surface of the lower cover surface portion 28, which is of a predetermined width and deepens slightly from the outside toward the center, so that the edge of a coin or the like can engage with it. Fitting pieces 31 are formed at two opposing locations on the upper end of the biasing portion housing portion 30, which protrude horizontally outward.

[0040] Furthermore, the lower half of the outer cylinder 19 is formed by cutting the inner circumferential wall of the lower end edge of the lower half of the outer cylinder 19 to create a fitting receiving portion 26 that is divided into four arc-shaped sections with a predetermined thickness and gaps between them. By pushing the lower cover piece 27 in from below the open lower half of the outer cylinder 19 with the biasing portion housing 30 facing upwards, and rotating it slightly, the fitting piece 31 is placed on top of the fitting receiving portion 26, thereby closing and fixing the lower part of the lower half of the outer cylinder 19.

[0041] It should be noted that the lower half of the outer cylinder 19 only needs to have a bottom, and the presence of a detachable bottom cover piece 27 as in this embodiment is not necessarily required. However, within the scope of the gist of the present invention, various modifications and changes are possible, such as fixing the bottom cover piece 27 and the lower half of the outer cylinder 19 with adhesive, or forming a male thread on the bottom cover piece 27 and a female thread on the lower half of the outer cylinder 19 and screwing them together to close and fix the lower part of the lower half of the outer cylinder 19.

[0042] Furthermore, as shown in Figures 3(a) and 3(b), the upper half of the outer cylinder 33 is attached to the upper part of the circular lower half of the outer cylinder 19 by extending a semicircular region in the plan view, which is approximately half the size of the lower half of the outer cylinder 19, in the vertical direction.

[0043] In the circumferential side wall 20 of the lower half of the outer cylinder 19, a cam groove 21 is formed in a roughly L-shape that runs continuously from the front to the rear of the circumferential side wall 20 in the middle of the length of the lower half of the outer cylinder 19, allowing the operating part 13 of the driven element 12, which allows the inner cylinder 2 to rotate up and down within the outer cylinder 18, to be operated from the outside. The groove is approximately the outer diameter of the guide base 14 of the driven element 12 and is slightly wider.

[0044] In this case, as shown in Figure 1(a), if the starting position 22 of the drive element 12 is set to the position of the cam groove 21 on the front upper side of the circumferential wall 20, the lead case 1 will be in a closed state. Also, as shown in Figure 1(b), if the ending position 23 of the drive element 12 is set to the position of the cam groove 21 on the rear upper side of the circumferential wall 20, the lead case 1 will be in an open state.

[0045] In other words, the starting position 22 and the ending position 23 are formed with cam grooves 21 at the same height, and the guide base 14 of the driven element 12 contacts the cam grooves 21 at the starting position 22 and the ending position 23, thereby limiting the upward height of the inner cylinder 2 within the outer cylinder 18.

[0046] This allows the guide base 14 of the drive element 12, which is inserted into the cam groove 21, to move the operating part 13 of the drive element 12 along the circumferential side wall 20, thereby enabling the inner cylinder 2 inside the outer cylinder 18 to rotate smoothly up and down.

[0047] In this embodiment, the cam groove 21 is formed in a roughly V-shape, but as long as the cam groove 21 is formed so that the starting position 22 and ending position 23 of the drive element 12 are at the same height, and the guide base 14 of the drive element 12 contacts the cam groove 21 at the starting position 22 and ending position 23 to limit the upward height of the inner cylinder 2 within the outer cylinder 18, it may be a roughly inverted V-shape as shown in Figures 5(a) and (b), or any other modified shape, and furthermore, the positions of the cam groove 21 and the drive element 12 can also be modified in various ways within the scope of the present invention.

[0048] Furthermore, as shown in Figures 3(a) and 3(b), the upper half of the outer cylinder 33 forms a semicircular storage piece 34 of a predetermined length in plan view, extending upward from a part of its upper end at the rear side of the lower half of the outer cylinder 19. The storage piece 34 forms a concave inner wall 36 by integrally forming its upper end as a semicircular upper lid piece 35 in plan view, and the front of the inner wall 36 of the storage piece 34, which communicates with the opening 24 of the lower half of the outer cylinder 19, is formed as the outer cylinder opening 37.

[0049] In other words, at the position where the sliding piece 9 of the inner cylinder 2, which rotates along the concave inner wall 36 of the housing piece 34, and the housing piece 34 overlap, the entire outer surface of the sliding piece 9 is surrounded by the concave inner wall 36 of the housing piece 34 and fits inside, and as shown in Figure 1(b), the inner cylinder opening 11 is exposed through the outer cylinder opening 37.

[0050] Furthermore, the shape of the outer cylinder 18 described above is not limited to this embodiment, and various modifications and changes are possible within the scope of the gist of the present invention. Similarly, the material is not limited to synthetic resin materials, and various modifications and changes are possible within the scope of the gist of the present invention, such as metals.

[0051] Furthermore, in the replacement core case 1 according to this embodiment described above, since the lid is closed when the sliding piece 9 and the housing piece 34 are separated, it is desirable to improve the airtight seal by making each of the semicircular sliding piece 9 and housing piece 34, which are semicircular in plan view, slightly larger than a semicircle so that their peripheral edges slightly overlap when the lid is closed.

[0052] As described above, the refill case 1 according to this embodiment consists of an inner cylinder 2, a follower 12 protruding from the inner cylinder 2, and an outer cylinder 18 that can accommodate the inner cylinder 2 and the biasing part 16 inside. The inner cylinder 2 consists of a lower half 3 and an upper half 8. The lower half 3 is formed as a bottomed cylindrical shape with an upper opening 5 that forms a refill housing part 4 that can accommodate the lower part of the refill R, and also allows water to enter from the circumferential side surface. flatA follower 12 is provided projecting in the direction, the upper half of the inner cylinder 8 forms a sliding piece 9 extending upward from a part of the upper end of the lower half of the inner cylinder 3, and the front of the inner wall 10 of the sliding piece 9, which communicates with the opening 5 of the lower half of the inner cylinder 3, forms the inner cylinder opening 11, the outer cylinder 18 consists of an outer cylinder lower half 19 and an outer cylinder upper half 33, the lower half of the outer cylinder 19 is formed as a bottomed cylinder with an upper opening 24, and a cam groove 21 is formed through the circumferential wall 20 for guiding the follower 12 that allows the inner cylinder 2 to rotate freely within the outer cylinder 18 from the outside, the upper half of the outer cylinder 33 forms a housing piece 34 extending upward from a part of the upper end of the lower half of the outer cylinder 19, and the front of the inner wall 36 of the housing piece 34, which communicates with the opening 24 of the lower half of the outer cylinder 19, forms the outer cylinder opening 37 The biasing part 16 is positioned in the gap between the inner bottom 25 of the lower half of the outer cylinder 19 and the outer bottom 6 of the lower half of the inner cylinder 3 in order to bias the inner cylinder 2 upward. The housing piece 34 opens so that the upper part of the replacement core R is exposed and can be discharged from the inner cylinder opening 11 through the outer cylinder opening 37 when it overlaps with the sliding piece 9 by the rotation of the inner cylinder 2, and closes the area consisting of the inner cylinder opening 11 and the outer cylinder opening 37 with the housing piece 34 and the sliding piece 9 when it is separated from the sliding piece 9. As a result, since a detachable lid is not used, the possibility of loss of function due to loss of parts is eliminated, and the possibility of loss of function due to wear can be eliminated by opening and closing control by the cam groove 21 and the driven element 12.

[0053] Furthermore, since the biasing section 16 consists of a compression spring 16a, the inner cylinder 2 can be consistently and stably biased upward inside the outer cylinder 18 with a simple configuration.

[0054] Furthermore, the lower half of the inner cylinder 3 consists of a lower base 7 and a replacement lead storage section 4. In a plan view, the lower base 7 is formed to be solid in the vertical direction for approximately half of the lower half of the inner cylinder 3, and the other approximately half is formed as the replacement lead storage section 4. The sliding piece 9 of the upper half of the inner cylinder 8 is formed by extending the lower base 7 upward, making it easy to manually remove the replacement lead R stored in the replacement lead storage section 4 from the inner cylinder opening 11.

[0055] Furthermore, the inner wall 36 of the housing piece 34 is formed in a concave shape so that when the housing piece 34 overlaps with the sliding piece 9 due to the rotation of the inner cylinder 2, the entire outer surface of the sliding piece 9 is surrounded by the inner wall 36 of the housing piece 34, thereby allowing the inner cylinder 2 to rotate smoothly within the outer cylinder 18.

[0056] Furthermore, since the cam groove 21 forms a roughly L-shaped through groove that extends over approximately half the circumference of the circumferential side wall 20 of the lower half of the outer cylinder 19 at an intermediate point in the longitudinal direction of the lower half of the outer cylinder 19, the open / closed lid state is maintained unless the follower 12 is pushed down against the biasing force of the biasing part 16 when the follower 12 is at the starting position 22 or ending position 23 of the L-shaped cam groove 21, thus preventing unintended opening and closing of the lid.

[0057] Although preferred embodiments and variations of the present invention have been described above, the present invention is not limited to these specific embodiments or variations, and various modifications and changes are possible within the scope of the gist of the present invention as described in the claims. [Explanation of Symbols]

[0058] R Replacement Refill 1. Refill case 2 Inner cylinder 3 Lower half of inner cylinder 4. Refill storage section 5. Opening in the lower half of the inner cylinder 6 Outer bottom 7 Lower base 8. Upper half of the inner cylinder 9 Sliding piece 10 Inner wall of the sliding piece 11 Inner cylinder opening 12 Subordinate verbs 16. Energizing part 16a Compression spring 18 Outer cylinder 19 Lower half of the outer cylinder 20 Circumferential side walls of the lower half of the outer cylinder 21 cam groove 24 Opening in the lower half of the outer cylinder 25 Inner bottom 33 Upper half of the outer cylinder 34 Packing pieces 36 Inner wall of the containment piece 37 Outer cylinder opening

Claims

1. It consists of an inner cylinder, a driven element protruding from the inner cylinder, and an outer cylinder that can house the inner cylinder and the biasing part inside. The inner cylinder consists of a lower half and an upper half. The lower half is formed as a bottomed cylinder with an upward opening, and has a replacement lead housing section that can accommodate the lower part of a replacement lead. The follower is provided projecting outward horizontally from the circumferential surface. The upper half has a sliding piece that extends upward from a part of the upper end of the lower half, and the front of the inner wall of the sliding piece, which communicates with the opening of the lower half, forms the inner cylinder opening. The outer cylinder consists of a lower half and an upper half. The lower half is formed as a bottomed cylinder with an upward opening, and a cam groove is formed through its circumferential wall to guide the drive that allows the inner cylinder to rotate within the outer cylinder. The upper half forms a housing piece that extends upward from a part of the upper end of the lower half, and the front of the inner wall of the housing piece, which communicates with the opening of the lower half, forms the outer cylinder opening. The biasing portion is positioned in the gap between the inner bottom portion of the lower half of the outer cylinder and the outer bottom portion of the lower half of the inner cylinder in order to bias the inner cylinder upward. The refill case is characterized in that the storage piece opens so that the upper part of the refill is exposed through the opening of the inner cylinder so that it can be discharged from the opening of the inner cylinder via the opening of the outer cylinder when it is in a position that overlaps with the sliding piece when the inner cylinder rotates, and the storage piece and the sliding piece close the region consisting of the opening of the inner cylinder and the opening of the outer cylinder when it is in a position that is separated from the sliding piece.

2. The replacement lead case according to claim 1, characterized in that the biasing portion consists of a compression spring.

3. The lower half of the inner cylinder comprises a lower base and a replacement lead housing portion, wherein the lower base is formed to be solid in the vertical direction for approximately half of the lower half of the inner cylinder in a plan view, and the other approximately half is formed as the replacement lead housing portion, and the sliding piece of the upper half of the inner cylinder is formed by extending the lower base upward as is, as described in claim 2.

4. The replacement lead case according to claim 3, characterized in that the inner wall of the housing piece is formed in a concave shape so that the entire outer surface of the sliding piece is surrounded by the inner wall of the housing piece when the housing piece overlaps with the sliding piece due to the rotation of the inner cylinder.

5. The replacement lead case according to any one of claims 1 to 4, characterized in that the cam groove forms a substantially L-shaped through groove that extends over approximately half the circumference of the circumferential side wall of the lower half of the outer cylinder at an intermediate point in the longitudinal direction of the lower half of the outer cylinder.

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