sheath

Abstract

To propose a sheath of a knife which has an excellent aesthetic appearance.SOLUTION: A sheath 200 is used in combination with a knife 100 in which a handle hole 121 is provided at a tip side of a handle 120. The sheath 200 has: a rotary shaft 220 pivotally supported by the handle hole 121; and a sheath body 210 having a storage groove 211 for storing a blade 110 of the knife 100. A sheath hole 213 is provided at a tip of the sheath body 210. The rotary shaft 220 is connected to a slide body 230 including a front shaft 231 and a slide shaft 231 and formed by bending a metallic bar. The front shaft 231 is pivotally supported by the sheath hole 213, and the slide body 230 penetrates through a through hole 221 provided at the rotary shaft 220 and can slide relative to the rotary shaft 220.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a sheath for covering a knife blade. [Background technology]

[0002] Sheaths that cover knife blades have existed for a long time. Leaving the edge of a knife, which is the sharp part of the blade, exposed is naturally dangerous, so a sheath that covers the edge is needed to prevent the edge from being exposed when the knife is not in use.

[0003] As mentioned above, the function required of a sheath used in combination with a knife is to cover the edge of the knife blade. In view of the function required of a sheath, it is also naturally required that the sheath does not easily slip off the knife blade. There are countless sheaths with such minimal functionality, and they come in a wide variety of shapes and materials. Summary of the Invention [Problem to be solved by the invention]

[0004] As mentioned above, there are many different types of scabbards. However, traditional scabbards tend to focus too much on fulfilling the functions required of a scabbard, neglecting aesthetics. Although knives are of course practical items, there are many collectors around the world who are fascinated by the functional beauty of knives. For such collectors, it is only natural that they would also want the sheaths that accompany their knives to be beautiful.

[0005] The main objective of the present invention is to provide a sheath used in combination with a knife with the functions required of a sheath, such as covering the edge of the blade and preventing it from slipping off the blade, as well as an excellent aesthetic appearance. [Means for solving the problem]

[0006] The present invention is as follows. The present invention is a sheath that covers the edge of a knife, which is used in combination with a knife that includes a handle and a plate-shaped blade connected to the handle with a sharp point at the tip, and has a handle hole that is a hole perpendicular to the blade at a position on the handle immediately behind the blade. Note that the knife in this application means a knife with a single blade. In other words, the sheath of the present invention can be combined with any knife; it must have a flat blade with a sharp point at the tip, and a handle hole, which is a hole perpendicular to the blade, located immediately behind the blade in the handle. Here, the ends of the blade, which correspond to both ends of the knife's length, are defined as the front of the knife, and the end of the handle as the rear of the knife. This definition applies not only to the front and rear of the knife (the tip and rear), but also to the sheath (or parts thereof). Furthermore, the blade of the knife used in combination with the sheath of the present invention must have a sharp point at the tip, but this merely means that the tip of the knife blade is sharp. The handle hole provided immediately behind the blade of the handle may be a bottomed hole with an opening exposed only on one side of the handle, or a hole that penetrates the handle perpendicular to the blade and has openings exposed on both sides of the handle. The handle hole may be, for example, a circular hole in cross section, but the cross-sectional shape is not limited to this. The handle hole may also be added to the handle of an existing knife, or may be provided during the manufacturing process of the knife for knives that are originally intended to be combined with the sheath of the present invention. A sheath used in combination with the knife described above comprises a sheath body having a storage groove, which is a groove with an open rear end and a length corresponding to the length of the knife blade, for storing at least a portion of the blade of the knife, and which covers the edge when the blade is stored in the storage groove; a sheath hole, which is a hole perpendicular to the blade, provided near the tip of the sheath body; a rotating shaft, which is a rod-shaped body, the base end of which can be removably and rotatably inserted into the handle hole; a front shaft, which is a rod-shaped body perpendicular to the blade of the knife and whose base end is rotatably supported in the sheath hole; and a slider, which includes a slide shaft, which is a rod-shaped body whose front end is connected to the front shaft and whose rear end is connected to the rotating shaft in a state where it can slide back and forth in the forward and backward directions. The sheath has a sheath body, a rotating shaft, and a slider as minimum parts. The sheath body of the sheath has a storage groove. The storage groove is a groove with an open rear end for storing at least a portion of the knife blade. The cross-sectional shape of the storage groove is, for example, approximately V-shaped when viewed from the front. The length of the storage groove corresponds to the length of the knife blade. When the knife blade is stored in the storage groove, the edge of the knife blade is covered by the sheath body. In addition, a sheath hole is provided near the tip of the sheath body, which is a hole that is perpendicular to the knife blade (more precisely, perpendicular to the knife blade when the knife blade is partially stored in the storage groove of the sheath body). The sheath hole may be a hole with a bottom, or it may be a hole that passes through the sheath body. The rotation shaft in the sheath is a rod-shaped body that can be inserted into the handle hole provided in the knife handle. The rotation shaft is rotatable when inserted into the handle hole and is also detachable from the handle hole. The rotation shaft is, for example, cylindrical, and it is preferable that at least the portion that is inserted into the handle hole is cylindrical. The axis of the rotation shaft inserted into the handle hole extends in a direction perpendicular to the knife blade. The sliding body in the sheath is composed of a front shaft and a slide shaft. The base end of the front shaft is rotatably supported in a sheath hole provided near the tip of the sheath body. The front shaft is a rod-shaped body that is perpendicular to the knife blade (more precisely, perpendicular to the knife blade when part of the knife blade is stored in the storage groove of the sheath body). The slide shaft is also a rod-shaped body. The front end side of the slide shaft is connected to the front shaft. The rear end side of the slide shaft is slidably connected to the above-mentioned rotation shaft.

[0007] The sheath described above is used as follows. When using a sheath, first insert the base end of the sheath's rotation shaft into the handle hole in the knife handle. Then, move the slide shaft of the slider slightly forward and insert the knife blade, blade edge first, into the storage groove in the sheath body, which is open at the top and rear ends. Because the sheath body can rotate around the front shaft connected to the tip of the slide shaft, the knife blade can be easily stored in the storage groove of the sheath body by placing the sheath body from below toward the knife blade. However, in this state, the tip of the knife blade may not be properly seated at the tip of the storage groove, and there may be a gap between the tip of the knife blade and the tip of the storage groove. In this case, move the sheath body toward the rear of the knife until the tip of the storage groove abuts the tip of the knife blade or until the rear end of the sheath body abuts the tip of the knife handle. This positions the tip of the knife blade correctly at the tip of the storage groove, and the knife blade is properly stored in the sheath body. The movement of the sheath body relative to the knife as described above is made possible by allowing rotation around the axis of the rotation shaft relative to the handle hole provided in the knife handle, allowing sliding relative to the rotation axis of the slide shaft in the slide body, and allowing rotational movement of the front shaft in the slide body relative to the sheath hole provided in the sheath body. When the knife blade is stored in the sheath of the present invention, the edge of the blade is hidden within the storage groove and is not exposed, and unless the slider is moved forward, there is little chance that the sheath body will fall off the knife blade. Therefore, the sheath of the present invention fulfills the required functions of covering the edge of the blade and preventing it from falling off the blade. In addition, the sheath of the present invention has a rod-shaped slider positioned to the side of the blade, aligned with the blade, when the knife blade is stored in the sheath. The presence of this slider connecting the sheath body and the knife handle gives the knife an aesthetically pleasing appearance when the blade is stored in the sheath. As mentioned above, the slider slides back and forth or rotates around the axis of rotation while storing the knife blade in the sheath. Such movement of the slider itself creates a functional beauty that goes beyond the act of storing the knife blade in the sheath.

[0008] As described above, the rotary shaft inserted into the handle hole provided in the knife handle is connected to the rear end side of the slide shaft in a state in which the slide shaft is allowed to slide in the front-to-rear direction. This connection may be made in any manner, but can be made, for example, as follows. In this case, the rotating shaft is provided with a through-hole through which the shaft of the rod-shaped body constituting the rotating shaft passes. The rear end side of the slide shaft of the slider passes through the through-hole of the rotating shaft. This makes it possible to easily realize both rotation of the rotating shaft relative to the handle hole and sliding of the slide shaft in the forward and backward directions. When the rotation shaft and the slide shaft in the slider are connected by passing the rear end of the slide shaft through a through hole provided in the rotation shaft, a drop-out prevention part that prevents the rear end of the slide shaft from passing through the through hole of the rotation shaft may be provided at the rear end of the slide shaft in the slider. By providing the drop-out prevention part, it is possible to prevent the rear end of the slide shaft from falling out of the through hole when the slider is slid forward. The drop-out prevention part can be, for example, an appropriate member that cannot pass through the through hole. The front shaft and the slide shaft may be made of rod-shaped bodies of the same thickness. In this case, the front shaft and the slide shaft are essentially made of a single rod-shaped body (e.g., a metal rod) bent. This minimizes the structure of the slide body, improving the appearance of the sheath including the slide body.

[0009] The slide body may be provided at a rear end of the slide shaft with a rear shaft that is a rod-shaped body bent in a predetermined direction relative to the slide shaft. The rear axle is one example of the above-mentioned drop-off prevention portion. By configuring the drop-off prevention portion in this way, the above-mentioned effects that the drop-off prevention portion provides can also be obtained. When the slide body includes a rear axle, the front axle, the slide axle, and the rear axle may be made of rod-shaped bodies of the same thickness. In this case, the front axle, the slide axle, and the rear axle are essentially made by bending a single rod-shaped body (e.g., a metal rod). This minimizes the structure of the slide body, improving the appearance of the sheath including the slide body. In addition, the slide body can be manufactured easily, resulting in cost savings.

[0010] A predetermined range on the tip side of the opening of the storage groove may be covered by a locking portion that covers the tip of the knife from the ridge side of the blade when the blade of the knife is stored in the storage groove. As described above, the blade of a knife used in combination with the sheath of the present invention has a sharp tip. When such a knife is combined with the sheath of the present invention, if a predetermined area on the tip side of the opening of the storage groove is covered by the locking portion as described above, if an unintended force acts on the knife blade stored in the storage groove in a direction that pushes the blade out of the storage groove (or if a force acts on the sheath body in a direction that pushes the blade out of the storage groove), the ridge side of the blade's tip will be locked by the locking portion, preventing the blade from projecting from the storage groove. This prevents the edge of the knife blade from being unintentionally exposed from the sheath.

[0011] The material of the sheath body can be selected appropriately. For example, the sheath body can be made of resin, metal, or the like. The sheath body may be made of antler, and the storage groove may be formed by removing the pores (which may be only a part of the pores) that are the porous part in the center of the antler. The porous core of antler, the hollow core, is soft and easy to process, i.e., remove. Therefore, by using antler of the appropriate thickness as the sheath body material, it is easy to create a sheath body that matches the shape of the knife blade. Furthermore, because the hollow core is relatively soft, it is less likely to damage the edge of the knife blade when it comes into contact with it, and it has little effect on the sharpness of the knife. Furthermore, the surface of the storage groove created within the hollow core is rough, which has a high coefficient of friction with the side of the knife blade, preventing the knife blade from accidentally slipping out of the storage groove. And above all, antler has an excellent texture. Making the sheath body out of antler further enhances the sheath's aesthetics. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a side view showing a portion of the distal end of the blade and handle of a knife used in combination with a sheath in one embodiment. [Figure 2] FIG. 10 is a side view of the tip of the handle of four types of knives to illustrate examples of knives that can be used in combination with the sheath in one embodiment and examples of knives that cannot be used in combination with the sheath. [Figure 3] FIG. 10 is a side view of a sheath in one embodiment. [Figure 4] (A) A top view, (B) a bottom view, and (C) an end view of the rear end of a sheath body included in the sheath, of one embodiment of the sheath. [Figure 5] FIG. 10 is a side view showing the sheath in use in one embodiment. [Figure 6] FIG. 1 is a side view showing the knife stored in the sheath in one embodiment. [Figure 7] 1A and 1B are a plan view and a bottom view, respectively, showing the area in front of the tip of the handle when the knife is stored in the sheath in one embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0013] A preferred embodiment of the present invention will now be described in detail with reference to the drawings.

[0014] FIG. 1 shows a portion of a knife 100 (blade 110 and part of handle 120) used in combination with a sheath according to one embodiment. The knife 100 itself may be an existing knife except for the handle hole described below. In other words, the knife 100 may be a known or well-known knife except for the handle hole.

[0015] As is well known, the knife 100 includes a blade 110 and a handle 120. The handle 120 is made of, for example, wood, resin, or metal. The blade 110 is often made of a hard material, such as metal or ceramic. The portion of the blade 110 corresponding to the line below the blade 110 in FIG. 1 is an edge 111 that is provided with the function of cutting objects. The shape of the blade 110 of the knife 100 shown in Fig. 1 is called a clip point. The tip of the blade 110 of the knife 100 shown in Fig. 1 has a sharp point 112. In this example, the point 112 is located lower than the ridge 113. Knives 100 that do or do not satisfy the above conditions are shown in Figure 2. Note that in Figure 2, a handle hole 121, which will be described later, is not shown. Figure 2(A) is a knife 100 equipped with a blade 110 of a type known as a Rambo type. Figure 2(B) is a knife 100 equipped with a blade 110 of a type known as a caper, Figure 2(C) is a knife 100 known as a fillet knife, and Figure 2(D) is a knife 100 having a blade 110 shaped similar to a vegetable knife. Of these, the knives 100 or their blades 110 shown in Figures 2(A), (B), and (C) have a sharp point 112 at the tip of the blade 110. On the other hand, the blade 110 shown in FIG. 2(D) does not have a sharp point 112 at its tip. Therefore, among the shapes of the knife 100 or blade 110 shown in Figure 2, the shapes of the knife 100 or blade 110 that can be combined with the sheath described in this embodiment are those shown in Figures 2(A), (B), and (C). Of course, as long as the above-mentioned condition, i.e., that the tip of the blade 110 has a sharp point 112, is met, knives with blades such as spear points, drop points, and American points can also be combined with the sheath described in this embodiment.

[0016] Handle 120 of knife 100 has handle hole 121. Handle 120 may be added to the handle 120 of an existing knife 100 later by the owner of knife 100, someone requested by the owner of knife 100, or a dealer of knife 100, or it may be added at the time of manufacturing knife 100. If the hole is to be added later, it is preferable that handle 120 of knife 100 be made of wood, which is easy to process. Handle hole 121 is provided at a position corresponding to the immediate rear of blade 110 of knife 100 in handle hole 121. The front of knife 100 (or the sheath, and components of knife 100 or the sheath, which will be described later) is the right side in FIG. 1, and the rear of knife 100 is the left side in FIG. 1. Handle hole 121 extends through handle 120 in a direction perpendicular to blade 110 of knife 100, i.e., perpendicular to the plane of the paper in Figure 1. Handle hole 121 may be a hole with a bottom, but in this embodiment, it is a hole that penetrates handle 120 in the above-mentioned direction. Handle hole 121 has the same cross section throughout its length, and is cylindrical in shape with a circular cross section, although this is not limited to this.

[0017] The sheath 200 used in combination with the knife 100 described above is as follows. The structure of the sheath 200 will be explained using the side view of Figure 3, the plan view of Figure 4(A), the bottom view of Figure 4(B), and the end view of the rear end of the sheath body (described below) in Figure 4(C). The sheath 200 is configured to include a sheath body 210 , a rotation shaft 220 , and a slider 230 .

[0018] The sheath body 210 corresponds to a case that houses at least a portion of the blade 110 of the knife 100 . The sheath body 210 can be made of, for example, wood or resin, but in this embodiment, it is made of antler, although this is not limited to these materials. The cross section of antler has a porous hollow portion extending from the center, with the outer periphery being denser. The outer periphery of the antler cut to a certain length is carved to carve out the outline of the sheath body 210, and the porous hollow portion of the antler is carved to form a storage groove (described below) in the sheath body 210. By carving out the easy-to-machine hollow portion to form the storage groove, the sheath body 210 can be manufactured relatively easily. Furthermore, because antler has an excellent texture, manufacturing the sheath body 210 from antler improves the overall aesthetic appearance of the sheath 200. The sheath 200 has a shape, when viewed from the side, that generally corresponds to the shape of the blade 110 of the knife 100 that is used in combination with the sheath 200. Sheath body 210 has a storage groove 211, for example, at the center in the width direction when viewed from above. Storage groove 211 forms a space for storing blade 110 of knife 100 inside sheath body 210. When at least a portion of blade 110 of knife 100 is stored in storage groove 211, edge 111 of blade 110 of knife 100 is covered by sheath body 210 and is not exposed to the outside. The end view of FIG. 4(C) is generally consistent throughout the length of the storage groove 211, except for the portion where the locking portion, described below, is present. In this embodiment, although not limited thereto, the storage groove 211 has a generally V-shape in front view, and is open at the top in FIG. 3, except for the portion where the locking portion, described below, is present, and its rear end is also open. The shape of the bottom of the storage groove 211 and its length in the front-to-rear direction correspond to those of the edge 111 of the blade 110 of the knife 100. However, when the blade 110 of the knife 100 is stored in the storage groove 211, it is acceptable for a small gap to be formed between the edge 111 of the blade 110 and the bottom of the storage groove 211. Furthermore, when the blade 110 of the knife 100 is stored in the storage groove 211, it is not necessary for the entire blade 110 to be stored in the storage groove 211 when viewed from the side. Although not necessarily limited to this, in this embodiment, some range of the tip of the storage groove 211 is covered by the locking portion 212. When the blade 110 of the knife 100 is stored in the storage groove 211, the locking portion 212 is located on the upper side (ridge 113 side) of the tip 112 of the knife 100 in FIG. 1. This prevents the blade 110 of the knife 100 stored in the storage groove 211 from coming out of the storage groove 211 unintentionally by the user. Furthermore, near the tip of the sheath body 210, for example, at a position further tip-side than the tip of the storage groove 211, there is provided a sheath hole 213 which is a hole in the thickness direction of the sheath body 210 (a direction perpendicular to the plane of the paper in FIG. 3). The sheath hole 213 is a hole for supporting the front shaft of a slider, which will be described later. The sheath hole 213 may be a hole with a bottom, or may be a hole that penetrates the sheath body 210 in its thickness direction. In this embodiment, the sheath hole 213 is a hole that penetrates the sheath body 210 in its thickness direction. The cross-sectional shape of the sheath hole 213 is, but is not necessarily limited to, a circle of the same diameter throughout.

[0019] The rotating shaft 220 is a rod-shaped body that is inserted into the handle hole 121 provided in the handle 120 when the sheath 200 is in use. When inserted into the handle hole 121, the rotating shaft 220 is rotatable about its axis within the handle hole 121. Preferably, at least the portion of the rotating shaft 220 that is inserted into the handle hole 121 has a shape that corresponds to the shape and size of the handle hole 121 so that the rotating shaft 220 is rotatable within the handle hole 121 and does not cause any rattle between the handle hole 121 and the rotating shaft 220. In this embodiment, the handle hole 121 is entirely cylindrical. The length of the rotating shaft 220 is set so that when one end of the rotating shaft 220 is inserted into the handle hole 121, the other end is exposed from the handle hole 121. In this embodiment, a length of one end of the rotating shaft 220 that is slightly shorter than the entire length of the handle hole 121 is inserted into the handle hole 121. The length of the rotating shaft 220 is set so that when one end of the rotating shaft 220 is inserted into the handle hole 121, a certain length of the other end is exposed from the handle hole 121. A through-hole 221, which is a hole penetrating the rotating shaft 220, is provided on the other end side of the rotating shaft 220, which is the portion that is exposed from the handle hole 121 when one end of the rotating shaft 220 is inserted into the handle hole 121. The through-hole 221 serves to connect the sliding body 230 to the rotating shaft 220. How the rotating shaft 220 and the sliding body 230 are connected using the through-hole 221 will be explained later. The through-hole 221 is a hole with a circular cross section, although this is not limited to this in this embodiment. In this embodiment, the length direction of the through-hole 221 is perpendicular to the axis of the rotating shaft 220, and the center of the cross section of the through-hole 221 passes through the axis of the rotating shaft 220.

[0020] The slider 230 is a member that connects the rotating shaft 220 and the sheath body 210 by having its front end connected to a sheath hole 213 provided in the sheath body 210 and its rear end or near the rear end connected to a through-hole 221 provided in the rotating shaft 220. The rear end side of the slider 230 is able to slide in the front-to-rear direction relative to the rotating shaft 220. As a result, the distance between the rotating shaft 220 and the sheath body 210 included in the sheath 200 of this embodiment is variable. In this embodiment, the slider 230 is a rod-shaped body, and in this embodiment, although not limited to, a rod-shaped body with a circular cross section and the same thickness along its entire length, bent. In this embodiment, although not limited to, the slider 230 is made of a metal, and in this embodiment, although not limited to, the slider 230 is made of copper. The sliding body 230 is configured to include a front shaft 231, a sliding shaft 232, and a rear shaft 233. At the joints between the front shaft 231 and the sliding shaft 232 and the joints between the sliding shaft 232 and the rear shaft 233, the rod-shaped bodies that make up the sliding body 230 are each bent at an angle of substantially 90°.

[0021] The front shaft 231 of the slider 230 extends in a direction perpendicular to the paper surface in FIG. 3. The front shaft 231 is inserted into the aforementioned sheath hole 213 provided near the tip of the sheath body 210. Although not necessarily limited to this, the front shaft 231 passes through the sheath hole 213 provided in the sheath body 210, with its tip protruding beyond the paper surface of FIG. 3 (see FIGS. 4(A) and 4(B)). The front shaft 231 is journaled in the sheath hole 213 and is rotatable about its axis within the sheath hole 213. A front shaft stopper 231A is attached to the tip of the front shaft 231 to prevent the front shaft 231 from falling out of the sheath hole 213. The front shaft stopper 231 may be any member having a shape and size that does not pass through the sheath hole 213. In this embodiment, the front shaft stopper 231A is a spherical metal member, although this is not a limitation. The front shaft stopper 231A and the front shaft 231 may be fixed together in any manner, and are not limited to this, but in this embodiment they are fixed together by brazing. The slide shaft 232 connects the front shaft 231 and the rear shaft 233. The tip of the slide shaft 232 is connected to the front end of the front shaft 231 in FIG. 3, and the rear end of the slide shaft 232 is connected to the rear shaft 233. In FIG. 3, the slide shaft 232 extends substantially horizontally from the front end of the front shaft 231. However, as will be described later, the slide shaft 232 may tilt around the rotation shaft 220 as a center or axis. The slide shaft 232 also plays a role in connecting the slide body 230 and the rotation shaft 220. A portion of the slide shaft 232 in front of the rear shaft 233 passes through a through-hole 221 provided in the rotation shaft 220. The slide shaft 232 has a slight amount of play between it and the through-hole 221, and is movable along the through-hole 221 in a substantially horizontal direction in Fig. 3. As a result, the slide shaft 232 is connected to the rotation shaft 220 in a state in which the slider 230 is slidable in the front-rear direction. The rear shaft 233 has its upper end connected to the slide shaft 232. In this embodiment, the rear shaft 233 extends in the vertical direction in Fig. 3, but this is not necessarily limited to this. It is sufficient if the rear shaft 233 is bent from the slide shaft 231 at an angle between itself and the slide shaft 231 such that an effect to be described later, that is, the slide shaft 231 does not fall out of the through-hole 221 of the rotation shaft 220, is achieved. The rear shaft 233 plays a role in preventing the slide shaft 232 from falling out of the through-hole 221 of the rotation shaft 220. The presence of the rear shaft 233 prevents the slide shaft 232 from moving excessively forward and causing the rear end of the slide shaft 232 to come out of the through-hole 221 of the rotation shaft 220. This is because if the slide shaft 232 were to attempt such movement, the rear shaft 233 would be locked by the portion surrounding the through-hole 221 of the rotation shaft 220.

[0022] Next, the method of use and operation of the sheath 200 will be described. When using the sheath 200, first, the base end of the rotating shaft 220 is inserted into the handle hole 121 provided in the handle 120 of the knife 100. In this embodiment, the rotating shaft 220 is inserted about 80 to 90 percent of the length of the handle hole 121 of the rotating shaft 220 (FIG. 5(A)). For the insertion depth of the rotating shaft 220 into the handle hole 121, see FIG. 7. At this stage, the blade 110 of the knife 100 has not yet been stored in the storage groove 211 of the sheath body 210. The sliding body 230, which has a front shaft 231 at its tip, is supported near the rear end of the sliding shaft 232 by the rotating shaft 220, which is rotatable while fitted into a handle hole 121 provided in the handle 120 of the knife 100, and is therefore rotatable around the rotating shaft 220. In addition, the rear end of the sliding shaft 232 of the sliding body 230 is slidable within a through hole 221 provided in the rotating shaft 220 in the length direction of the through hole 221. In addition, the sheath body 210 is rotatable around the front shaft 231 of the sliding body 230, which is journaled in a sheath hole 213 provided in the sheath body 210. Next, the sliding body 230 is pulled forward and moved fully forward until the rear shaft 233 engages with the rear periphery of the through-hole 221 in the rotating shaft 220 (FIG. 5(A)). However, it does not matter whether the sliding body 230 is moved fully forward or the rotating shaft 220 is inserted into the handle hole 121.

[0023] Next, the tip of sheath body 210 is pulled slightly upward, and point 112 of blade 110 of knife 100 is placed near the tip of storage groove 211 of sheath body 210 (FIG. 5(B)). Then, the rear end of sheath body 210 is lifted upward (see the arrow in FIG. 5(B)) while ensuring that point 112 of blade 110 of knife 100 fits into the space located below locking portion 212 at the tip of storage groove 211. When lifting the rear end of sheath body 210 upward, sliding body 230 rearward relative to rotation shaft 220 moves sheath body 210 rearward. This places the blade 110 of the knife 100 in the storage groove 211, with the edge 111 of the blade 110 covered by the sheath body 210 (Fig. 5(C)). Fig. 6 shows a side view of the entire knife 100 and sheath 200 at this stage. Fig. 7(A) shows a plan view of the front portion of the handle 120 in the state shown in Fig. 5(C), and Fig. 7(B) shows a bottom view of the same. When the blade 110 of the knife 100 is stored in the storage groove 211, a gap may form between the tip of the handle 120 of the knife 100 and the rear end of the sheath body 210, allowing the edge 111 of the blade 110 of the knife 100 to be slightly visible through the gap. When this occurs, a gap is generated between the front end of the storage groove 211 and the front end of the blade 110 of the knife 100, and the tip 112 of the blade 110 may not reach the space below the locking portion 212 in the storage groove 211 (or the tip 112 may not reach the very front end of the storage groove 211). When this occurs, the sheath body 210 can be grasped and pushed rearward to return to the state shown in FIG. 5(C), i.e., a state in which there is no gap between the front end of the handle 120 of the knife 100 and the rear end of the sheath body 210 and the edge 111 of the blade 110 of the knife 100 is completely covered by the sheath body 210. It should be noted that when blade 110 of knife 100 is stored in storage groove 211 of sheath body 210, it is not necessary for the entire blade 110 to be covered by sheath body 210. In Figure 5(C), edge 111 of blade 110 of knife 100 is entirely covered by sheath body 210, but ridge 113 of blade 110 is exposed from sheath body 210 except for a portion on the tip side. 5(C), the tip 112 of the blade 110 of the knife 100 is located under the locking portion 212 that covers the tip of the storage groove 211. Therefore, even if a downward force is applied to the rear end of the sheath body 210, the locking portion 212 located at the tip of the storage groove 211 is locked onto the tip 112 of the blade 110 of the knife 100, and the sheath body 210 will not rotate. This prevents the blade 110 of the knife 100 from coming out of the storage groove 211 of the sheath body 210 at an unintended timing. Furthermore, the antler cavity that is the material of the portion of the antler that forms the sheath body 210 where the storage groove 211 is made is relatively soft, so even if the edge 111 of the blade 110 of the knife 100 comes into contact with it, the edge 111 is less likely to be damaged and there is little effect on the sharpness of the knife 100. Furthermore, the surface of the storage groove 211 made in the cavity is rough, and the coefficient of friction between it and the side of the blade 110 of the knife 100 is high, so the blade 110 of the knife 100 is less likely to come out of the storage groove 210 unintentionally. 5(C), the slide body 230, and in particular the slide shaft 232 of the slide body 230, runs in a straight line from near the tip of the handle 120 of the knife 100 to near the tip of the blade 110. The sheath 200 of this embodiment is beautiful in itself, but the presence of the slide shaft 232 running in a straight line enhances the aesthetic appeal of the knife when stored in the sheath 200.

[0024] When the knife 100 is to be used, the sheath 200 is removed from the knife 100 . To remove the sheath 200 from the knife 100, the sheath body 210 is pulled forward so that the tip 112 of the blade 110 of the knife 100 is released from the space below the locking portion 212 in the storage groove 211, and then the rear end of the sheath body 210 is pulled down to rotate the sheath body 210 around the front shaft 231. This causes the blade 110 of the knife 100 to emerge from the storage groove 211 and become exposed to the outside of the sheath body 210. The sheath body 210 is first moved forward so that the tip 112 does not lock into the locking portion 212 of the sheath body 210 when the sheath body 210 is rotated. Then, by removing the rotation shaft 220 provided in the sheath 200 from the handle hole 120 provided in the handle 120 of the knife 100, the sheath 200 can be separated from the knife 100. The knife 100 separated from the sheath 200 can be used as needed. [Explanation of symbols]

[0025] 100 knives 110 blades 120 patterns 121 Handle hole 200 sheaths 210 Sheath body 211 Storage groove 212 Locking part 213 Scabbard hole 220 Rotational Axis 221 Through hole 230 Slide body 231 front axle 232 Slide shaft 233 rear axle

Claims

1. A sheath for covering the edge of the blade of a knife, the sheath including a handle and a plate-shaped blade connected to the handle with a sharp point at the tip, the handle having a handle hole that is a hole perpendicular to the blade at a position immediately behind the blade on the handle, the sheath being used in combination with a knife with the blade end at the front and the handle end at the rear, a sheath body having a storage groove, the rear end of which is open and having a length corresponding to the length of the knife blade, for storing at least a portion of the edge side of the blade of the knife, and by inserting at least a portion of the edge side of the blade into the storage groove over the entire length of the edge, the entire length of the edge of the blade can be stored in the storage groove; a sheath hole that is provided near the tip of the sheath body and is perpendicular to the blade; a rod-shaped rotating shaft whose base end is detachably and rotatably inserted into the handle hole when the sheath is in use; a front shaft, which is a rod-shaped body perpendicular to the blade of the knife and whose base end is rotatably supported in the sheath hole; and a slide shaft, which is a rod-shaped body whose front end is connected to the front shaft and whose rear end is connected to the rotation shaft in a state where it can slide in the front and rear directions; It also has the rotating shaft is provided with a through-hole that is a hole through which an axis of a rod-shaped body that constitutes the rotating shaft passes, The rear end side of the slide shaft of the slide body is inserted through the through hole of the rotation shaft. sheath.

2. A sheath for covering the edge of the blade of a knife, the sheath including a handle and a plate-shaped blade connected to the handle with a sharp point at the tip, the handle having a handle hole that is a hole perpendicular to the blade at a position immediately behind the blade on the handle, the sheath being used in combination with a knife with the blade end at the front and the handle end at the rear, a sheath body having a storage groove, the rear end of which is open and having a length corresponding to the length of the knife blade, for storing at least a portion of the edge side of the blade of the knife, and by inserting at least a portion of the edge side of the blade into the storage groove over the entire length of the edge, the entire length of the edge of the blade can be stored in the storage groove; a sheath hole that is provided near the tip of the sheath body and is perpendicular to the blade; a rod-shaped rotating shaft whose base end is detachably and rotatably inserted into the handle hole when the sheath is in use; a front shaft, which is a rod-shaped body perpendicular to the blade of the knife and whose base end is rotatably supported in the sheath hole; and a slide shaft, which is a rod-shaped body whose front end is connected to the front shaft and whose rear end is connected to the rotation shaft in a state where it can slide in the front and rear directions; It also has The front shaft and the slide shaft are made of rod-shaped bodies of the same thickness. sheath.

3. a fall-off prevention portion that prevents the rear end of the slide shaft from passing through the through hole of the rotation shaft is provided at the rear end of the slide shaft of the slider; The sheath of claim 1.

4. A rear shaft, which is a rod-shaped body bent in a predetermined direction relative to the slide shaft, is provided at the rear end of the slide shaft of the slide body. The sheath of claim 1.

5. The front shaft, the slide shaft, and the rear shaft are made of rod-shaped bodies of the same thickness.

5. The sheath according to claim 4.

6. a predetermined range on the tip side of the opening of the storage groove is covered by a locking portion that covers the tip of the knife from above when the blade of the knife is stored in the storage groove; A sheath according to claim 1 or 2.

7. The sheath body is made of deer antler, and the storage groove is formed by removing a void, which is a porous portion in the center of the deer antler. A sheath according to claim 1 or 2.

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