Blade fixing component for razors

Abstract

We provide razors that can be recycled as waste paper. [Solution] The problem is solved by a blade fixing member that is attached to a handle, comprising one or more razor blades, a frame having a blade support portion for fixing the razor blades and a blade tip exposure opening through which the cutting edge of the blade is exposed, wherein the frame is assembled by bending one or more sheet materials.

Description

[Technical Field]

[0001] The present invention relates to a razor and a blade fixing member for a razor. [Background technology]

[0002] Razors are commonly known to have a T-shape, consisting of a razor head (sometimes called a cartridge, etc.) with a metal blade housed in a resin case, and a handle that integrates the head to which the razor head is attached and the handle for the user to grip and operate. The razor head usually has a metal blade fixed to a hard plastic frame, and the handle is usually made of hard plastic or metal. As a result, they are difficult to fold or disassemble, require a large space for storage, and are inconvenient to carry.

[0003] Furthermore, separating the plastic frame from the metal blade was extremely difficult, practically impossible, and both were treated as combustible or noncombustible waste along with the handle, resulting in no effective recycling of the materials. Additionally, attempting to separate the materials posed a risk of injury to workers due to the metal blade.

[0004] On the other hand, inns, hotels, and other accommodations, disposable razors with plastic heads and handles are sometimes provided as amenities. In recent years, issues such as marine pollution caused by microplastics have attracted attention, and the global movement to reduce plastic use has progressed from an environmental protection standpoint. In Japan, the "Act on Promotion of Resource Recycling Related to Plastics" has been enacted, which mandates the reduction of single-use plastic products for certain businesses, such as the hotel industry. This "Act on Promotion of Resource Recycling Related to Plastics" designates plastic razors as "specific plastic products," and the reduction of plastic use in razors is attracting attention.

[0005] A razor with a paper handle, formed by folding and assembling a thin sheet, is proposed, for example, in Patent Document 1 below. This razor has a paper handle, resulting in less plastic usage overall, and can be transported and stored in sheet form, improving storage and transportability. For example, it can be delivered to stores or accommodations in sheet form, stored in the back room in sheet form, and assembled and used when needed. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Patent No. 68458478 [Overview of the Initiative] [Problems that the invention aims to solve]

[0007] However, although the razor in Reference 1 has a paper handle, the razor head (cartridge) consists of a metal blade fixed to a hard plastic frame, which sometimes required separation of the razor head and handle during disposal or recycling.

[0008] On the other hand, razors with plastic or metal handles have a mechanism, also called a pivoting head or pivoting mechanism, that allows the razor head attached to the handle to move to follow the curves of the skin, and these are widely accepted by users. However, razors formed by folding and assembling thin sheets of material do not have such a pivoting mechanism.

[0009] In the razor described in Reference 1, the flex of the handle causes the razor head (cartridge) to be applied to the user's skin, but the razor head itself does not move; only the surface pressure between the razor head and the skin changes.

[0010] Furthermore, in the razor of Patent Document 1, in order to form a handle portion for gripping, particularly in the handle body, multiple folding steps are necessary, and further simplification of assembly is required.

[0011] Therefore, the main object of the present invention is to provide a razor and a blade fixing member for a razor that can be discarded or recycled without disassembling and separating the razor head, and without separating the razor head and the handle body, and can be easily assembled from a sheet shape. A further object is to provide a razor having a pivoting mechanism in which the blade and the blade fixing member can follow a curved surface.

Means for Solving the Problems

[0012]

[0013]

[0014]

[0015]

[0016]

[0017]

[0018]

[0019] The above issues have been resolved. The one means is a blade fixing member attached to a handle body for a razor, The blade fixing member has a blade, a frame body assembled from a sheet material and having a blade support portion to which the blade is fixed and a blade tip exposure port through which the blade tip of the blade fixed to the blade support portion is exposed. The frame body has a front portion having a blade tip exposure port and a back portion facing the front portion. The blade support portion is formed between the front portion and the back portion by raising a part of the sheet material to the back portion side, and the blade tip exposure port is formed by opening to the front portion by the raising of the blade support portion. It is attached to the handle body via the back portion. A blade fixing member characterized by the above.

[0020] The two The means are, It has a second blade support part connected to the rear part, The second blade support is bent towards the front and positioned opposite the blade support formed by cutting and bending. The blade is also fixed to the second blade support, The blade tip is exposed at the blade tip exposure opening. The cutting edge of the blade fixed to the blade support, The cutting edge fixed to the second blade support, The blades are positioned so that they overlap with a slight offset. The above one This is a blade fixing member related to the means.

[0021] The three The means are, The movement of the blade support is restricted by the rear part, as described above. one or the two This is a blade fixing member related to the means.

[0022] The four The means are, A blade fixing member that is attached to the handle of a razor, The blade fixing member comprises a blade and a frame assembled from a sheet material, having a blade support portion to which the blade is fixed and a blade tip exposure opening through which the cutting edge of the blade fixed to the blade support portion is exposed. The frame is It has a front portion having a blade tip exposure opening, a rear portion facing the front portion, a rear side opening formed in the rear portion, one or more front side grooves formed on the edge of the blade tip exposure opening, and one or more rear side grooves formed on the edge of the rear side opening, The front and back sections are connected via a fold line, and the folding along this fold line positions the front and back sections opposite each other. An opening is formed connecting the front and back sections by the blade tip exposure opening and the back side opening, and a blade support groove is formed by the front side recess and the back side recess. The blade is supported by fitting into its support groove. It is attached to the handle via the back. This is a blade fixing member characterized by the following features. [Effects of the Invention]

[0023] According to the present invention, a razor and a blade fixing member for a razor are provided that can be disposed of or recycled without disassembling and separating the razor head, and without separating the razor head from the handle, and that can be easily assembled from a sheet shape. Furthermore, a razor is provided that has a pivoting mechanism that allows the blade and blade fixing member to follow a curved surface. [Brief explanation of the drawing]

[0024] [Figure 1] This is a front view of the razor R of the first embodiment. [Figure 2] This is a rear view of the razor R of the first embodiment. [Figure 3] This is a side view of the razor R of the first embodiment. [Figure 4] This is a perspective view of the razor R of the first embodiment. [Figure 5] This is a rear perspective view of the razor R of the first embodiment. [Figure 6] This is a front view of the blade fixing member according to the first embodiment. [Figure 7] This is a diagram of the VII-VII section in Figure 6. [Figure 8] This figure shows the unfolded state of the frame of the blade fixing member according to the first embodiment. [Figure 9] This is a first diagram illustrating the assembly of the blade fixing member according to the first embodiment. [Figure 10] This is a second diagram illustrating the assembly of the blade fixing member according to the first embodiment. [Figure 11] This is a rear view of the blade fixing member according to the first embodiment. [Figure 12] This is a diagram illustrating the blade support portion according to the first embodiment. [Figure 13] This is a diagram showing the XIII-XIII section in Figure 12. [Figure 14] This is a view from the rear side of the unfolded state of the blade fixing member according to the first embodiment. [Figure 15] This is a diagram showing the XV-XV section of Figure 14. [Figure 16] This is a diagram illustrating how the blade fixing member of the razor R in the first embodiment is attached to the handle. [Figure 17] This is a diagram of the unfolded handle according to the first embodiment. [Figure 18] This is a perspective view of the handle according to the first embodiment. [Figure 19] This figure shows a cross-section of the multilayer paper according to this embodiment. [Figure 20] This is a front view of the blade fixing member according to the second embodiment. [Figure 21] This figure shows the cross-section XXI-XXI of Figure 20. [Figure 22] This is the first diagram illustrating the assembly of the blade fixing member according to the second embodiment. [Figure 23] This is a diagram showing the cross-section XXIII-XIII in Figure 22. [Figure 24] This figure shows the unfolded state of the frame of the blade fixing member according to the second embodiment. [Figure 25] This is a diagram illustrating the blade support portion according to the second embodiment. [Figure 26] This is a view from the rear side of the unfolded state of the blade fixing member according to the second embodiment. [Figure 27] This is a front view of the blade fixing member according to the third embodiment. [Figure 28] This figure shows the unfolded state of the frame of the blade fixing member according to the third embodiment. [Figure 29] This is a front view of the frame according to the third embodiment. [Figure 30] This is a perspective view showing the blade of the third embodiment. [Figure 31] This figure shows the unfolded state of the fixed frame in the third embodiment. [Figure 32] This is a diagram illustrating the installation of the fixed frame according to the third embodiment. [Figure 33]This is a front view showing a blade fixing member to which a fixing frame according to the third embodiment has been attached. [Figure 34] This is a diagram of the XXXIV-XXXIV section shown in Figure 33. [Figure 35] This is a rear perspective view of the handle according to the fourth embodiment. [Figure 36] This is a diagram showing the unfolded state of the handle according to the fourth embodiment. [Figure 37] This is a rear view of the handle according to the fourth embodiment. [Figure 38] This is a side view of the handle according to the fourth embodiment. [Figure 39] This is a perspective view of the pattern according to the fourth embodiment. [Figure 40] This is a front view of the handle according to the fourth embodiment. [Modes for carrying out the invention]

[0025] Next, embodiments of the razor according to the present invention will be described in detail below with reference to Figures 1 to 40. However, the present invention is not limited to the illustrated shapes or these embodiments. Within the scope of the present invention, the detailed shapes and positions of each part can be changed to the extent that they do not hinder the effects of the present invention. Furthermore, the terms "front," "back," "top," "bottom," "left," and "right" in the present invention and this specification are not terms that indicate absolute positions and vary depending on the viewer's position. Also, terms such as "first," "second," etc., do not necessarily indicate the order of operation. Furthermore, embodiments of the blade fixing member for the razor according to the present invention will be described as appropriate in the description of the razor embodiments.

[0026] (First Embodiment) The razor R of the first embodiment will be described with reference to Figures 1 to 19. In particular, as shown in Figures 1 to 5, the razor R of this embodiment has a blade fixing member 2 to which a razor blade 21 is fixed and a handle body 1.

[0027] The blade fixing member 2 of this embodiment is shown in particular in Figures 6 to 15. Characteristically, the blade fixing member 2 is in the form of a single sheet when unfolded, as shown in Figure 8, and one or more razor blades 21, as shown in particular in Figure 15, are fixed to a frame 22 assembled by folding this single sheet material 20, and has a front portion 23 that constitutes a front surface 23F that slides on the skin when in use, and is attached to the mounting surface 31A of the handle body 1.

[0028] The frame 22 has a blade support portion 26 and a blade tip exposure opening 27 through which the cutting edge 21t of the blade 21 is exposed, as shown in particular in Figures 5 and 7, and the blade 21 is fixed to the blade support portion 26.

[0029] The blade fixing member 2 of the razor R in this embodiment is characterized in that it has a back portion 24 facing the front portion 23, as shown in Figures 6 and 7, and Figures 12 to 15. The blade support portion 26 is a piece-shaped structure formed between the front portion 23 and the back portion 24 by cutting and bending a part of the sheet material 20 toward the back portion 24. Furthermore, the blade tip exposure opening 27 is the part that opens to the front portion 23 due to the cutting and bending of the blade support portion 26. As shown in Figure 16, this blade fixing member 2 is attached to the mounting surface 31A of the handle body 1 via the back portion 24, and is configured so that the blade tip 21t is positioned on the front portion 23F that slides over the skin during use.

[0030] The shape of the frame 22 is preferably a thin, rectangular hexahedron or a similar shape, as shown in Figures 6, 7, and 11, having a rectangular front portion 23 with opposing longitudinal edges 23L and transverse edges 23S, a rear portion 24 facing the front portion 23, and a pair of longitudinal side portions 22L and a pair of transverse side portions 22S connected to the front portion 23 and the rear portion 24. However, the shape of each part such as the frame 22 and the front portion 23 is not limited to the illustrated shape. It can be any shape as long as it does not hinder the effects of the present invention.

[0031] The shape of the sheet material 20 in the unfolded state of the frame 22 is not necessarily limited, but as shown in Figure 8, a preferred shape can be exemplified having a rectangular front portion 23 having opposing longitudinal edges 23L and transverse edges 23S, a pair of longitudinal side portions 22L connected to the longitudinal edge 23L side of the front portion 23 via fold lines F1, F1, a pair of transverse side portions 22S connected to the transverse edge 23S side of the front portion 23 via fold lines F2, F2, a back flap portion 24F, 24F connected to the transverse side portions 22S via fold lines F3, F3, and a back piece 24P, 24P connected to the longitudinal side portions 22L via fold lines F4, F4. In the illustrated form, an even more preferred form is provided in which an auxiliary transverse side piece 22S' is further connected to one of the back pieces 24P via a fold line F9.

[0032] From this unfolded sheet material 20S, as shown in Figures 8 to 11, the frame 22 is formed by folding the long side portions 22L, 22L from the front portion 23 along fold lines F1, F1, and folding the short side portions 22S, 22S along fold lines F2, F2, so that they stand upright from the front portion 23. With the long side portions 22L and short side portions 22S standing upright from the front portion 23, the back flap portions 24F, 24F are folded along fold lines F3, F3, and the back pieces 24P, 24P are folded along fold lines F4, F4, so that the back portion 24 faces the front portion 23, and the whole is formed into a thin rectangular hexahedron shape. In this embodiment, the preferred dimensions of the frame are such that the length of the longitudinal edge 23L of the front portion 23 is 36 to 45 mm, the length of the transverse edge 23S is 12 to 17 mm, and the distance between the front portion 23 and the back portion 24 is 3 to 10 mm. However, the specific size and area of ​​each surface are not limited and can be similar to the general shape of a razor head (cartridge).

[0033] As described above, the blade fixing member 2 of the razor R in this embodiment has a blade support portion 26 cut out from the front portion 23 and a blade tip exposure opening 27 formed by cutting out the blade support portion 26. The base end of the razor blade 21 is fixed to the blade support portion 26, and the blade tip 21t is exposed to the front side through the blade tip exposure opening 27. In the illustrated form, in particular as shown in Figures 8, 12 to 13, the sheet material 20 constituting the frame 22 has a substantially U-shaped slit 26S that is convex from one side to the other, and a line connecting the ends 26e, 26e, preferably the ends together, is used as a fold line 25. The area enclosed by this fold line 25 and the slit 26S is cut out so as to be folded back towards the back portion 24 side along the fold line 25, and has a blade support portion 26 and a blade tip exposure opening 27. In the illustrated configuration, the slit 26S formed in the sheet material is roughly U-shaped, so both the blade tip exposure opening 27 and the blade support portion 26 are formed in an elongated rectangular shape. However, the shape of the blade support portion 26 and the blade tip exposure opening 27 is not necessarily limited to this shape. The shape and width of the slit 26S are not limited, and other shapes such as an elongated trapezoidal shape or an elongated semi-elliptical shape may be used. Furthermore, the means for making the blade support portion 26 cut up is not limited to the slit 26S, and a cutout portion of an appropriate shape may be provided in the front portion 23. In other words, the shape of the edge of the blade support portion 26 and the blade tip exposure opening 27 do not necessarily have to be the same. However, the blade tip exposure opening 27 should have an area and shape sufficient to expose the blade tip 21t of the blade 21 and allow shaving of body hair such as beards with a razor blade. The shape of the opening is not necessarily limited, but 30-40 mm in the longitudinal direction and 6-14 mm in the short direction is desirable.

[0034] In this embodiment, as shown in Figures 6 and 7, the base end of the blade 21 is fixed to the blade support portion 26, and the blade tip 21t is exposed at the blade tip exposure opening. The method of fixing the razor blade 21 to the blade support portion 26 is not necessarily limited. It can be fixed by appropriate fixing means such as chemical fixing means such as adhesive or adhesive tape, or mechanical fixing means such as crimping or eyelets. The illustrated form shows a particularly preferred form in which the blade 21 is fixed by crimping 28. Since the razor R is often used in a manner that comes into contact with water, it is desirable to use a mechanical fixing means such as crimping 28. The specific type of adhesive is not limited, but if fixing is done with an adhesive, it is desirable to use a water-resistant adhesive.

[0035] The blade 21 can be a thin, plate-shaped razor blade made of a known, common metal such as iron or stainless steel, as shown in Figure 15. In addition, razors R can be of the multi-blade type, such as a double-blade or triple-blade type, in which multiple blades are fixed with their cutting edges offset from each other. Recently, six-blade razors have also become known. In the razor R of the present invention, by fixing multiple blades to the blade support part 26 in the blade fixing member 2, it can be made into a multi-blade type such as a double-blade or triple-blade type.

[0036] The illustrated configuration shows a two-blade design. Specifically, as shown in Figures 7 and 15, two blades 21 are stacked with their cutting edges 21t offset, separated by a spacer 21S of a predetermined thickness. Each blade 21 and spacer 21S has a crimping hole, and by aligning the crimping holes of each blade 21 and spacer 21S and fixing them to the blade support 26, the blades are fixed at an appropriate spacing of the cutting edges 21t, predetermined by the thickness of the spacer 21S and the position of the crimping holes. In this embodiment, there are two blades, but the number of blades in the razor in this invention is not limited. It may be a single blade or three or more blades. When there are multiple blades, using crimping 28 as the fixing means in this way is advantageous because it allows the cutting edges 21t of multiple blades to be easily fixed in the appropriate position, and the risk of separation during use is significantly reduced. The material of the spacer 21S is not limited, but suitable metals such as iron and stainless steel, or hard materials such as ceramics and wood are preferably used. In the illustrated form, one spacer 21S is used, but three or four spacers 21S may be used. Multiple spacers 21S may be placed between the blades. Furthermore, for example, in Figure 7, a spacer 21S may be interposed between the crimp head 28H located on the back side and the blade located on the furthest back side. In this case, since the blade located on the furthest back side is held in place by parts other than the crimp 28, the blade is less likely to be damaged when fixing it, and the blade can be more securely fixed to the blade support.

[0037] On the other hand, in the illustrated embodiment of the razor R, as previously described, the back flap portion 24F is folded along the fold line F3, and the back piece 24P is folded along the fold line F4 to form a back portion 24 facing the front portion 23. In this configuration, it is not limited which of the pair of back flap portions 24F, 24F or the pair of back pieces 24P, 24P is folded first; the back portion 24 only needs to be formed by the overlap of the back flap portion 24F and the back piece 24P. In one configuration, as shown in Figures 8 to 11, the back portion 24 is formed by folding in the order of one back piece 24P, the pair of back flap portions 24F, 24F, and the other back piece 24P from the front portion 23 side. In the illustrated configuration, a more preferred configuration is one in which the back piece 24P to which the auxiliary short side piece 22S' is connected is folded first, i.e., to be located closest to the front portion 23, and the auxiliary short side piece 22S' is assembled by folding along the fold line F9 from this back piece 24P to form the short side portion 22S. This prevents the back piece 24P from becoming a free piece and falling or moving towards the front portion. The method of fixing the back flap portion 24F and the back piece 24P is not limited. For example, the overlapping portions of the back flap portion 24F and the back piece 24P can be bonded and fixed using adhesive means such as an adhesive. In the illustrated configuration, one back piece 24P is provided with a curved locking edge 24e formed by a slit or the like, and the other back piece 24P is provided with a locking piece 24t formed by a slit or the like, and the back pieces 24P, 24P are fixed by the engagement of these and connecting them to each other. Using such engaging means such as locking pieces or inserting into slits is desirable because it allows assembly without the use of adhesives or the like.

[0038] In this embodiment, it is desirable that the blade fixing member 2 is configured such that the movement of the blade support portion 26 is restricted by the back portion 24. Furthermore, it is desirable that this restriction determines the position of the blade support portion 26 in the blade fixing member 2, and thus the position of the blade tip 21t. That is, as shown in Figure 13, the blade support portion 26 of this frame 22 is folded back along the fold line 25 and is a free piece with the fold line 25 as its axis. Therefore, as shown in Figure 7, by adjusting the folded length of the blade support portion 26 and the separation distance between the front portion 23 and the back portion 24, the blade support portion 26 is brought into contact with or pressed against the back portion 24, thereby restricting its movement. This restriction of movement prevents the blade tip 21t of the blade 21 from protruding excessively from the blade tip exposure opening 27. Furthermore, the position of the blade tip at the restricted position can be adjusted to an appropriate position. In the illustrated configuration, the base edge of the blade 21 is fixed beyond the edge of the blade support portion 26. Therefore, when the base end of the blade 21 contacts the back portion 24, the movement of the blade support portion 26 is restricted, and the position of the blade tip 21t is adjusted to an appropriate position at that point. If the base edge of the blade 21 is fixed so as not to exceed the edge of the blade support portion 26, the movement of the blade support portion 26 is restricted when the edge of the blade support portion 26 contacts or is pressed against the back portion 24. This allows the position of the blade tip 21t to be determined. The position of the blade tip 21t here includes the angle between the razor blade and the opening surface of the blade tip exposure opening 27, and the distance from or to the opening surface. Furthermore, while it is desirable that the determined position of the blade 21 be a fixed position, it does not necessarily have to be a fixed position and may be a range. While the specific position of the blade is not limited, a preferred angle is 20-25 degrees, preferably 22-24 degrees, at the blade tip relative to the direction of sliding the blade forward during use. It should be adjusted in this manner.

[0039] Furthermore, if the blade support portion 26 has a long side portion 22L along with a back portion 24, as shown in the figure, it is desirable that the movement of the blade support portion 26 be restricted by at least one of the back portion 24 and the long side portion 22L. By having the long side portion 22L abut or press against the base edge of the blade 21 or the edge of the blade support portion 26, the blade support portion 26 is prevented from moving excessively towards the front, thereby preventing the blade tip 21t from moving excessively inward from the opening surface.

[0040] On the other hand, in this embodiment, if the blade 21 is fixed in the razor R by eyelets or rivets 28, then, as shown in Figure 7, the head 28H of the rivet 28 or the like that protruding from the blade support portion 26 can also be an element that determines the position of the blade tip 21t. That is, since the head 28H of the rivet 28 is located between the blade support portion 26 and the back side of the front portion 23, it restricts the distance between the two from becoming excessively close. Therefore, by setting the position of the blade tip to a predetermined desired position at the restricted position, the rivet 28 can be used as an element that determines the position of the blade tip 21t to an appropriate position.

[0041] On the other hand, the handle 1 of this embodiment, as shown in particular in Figures 1 to 5 and Figures 17 to 18, has a handle portion 10 that is held by the user and a head portion 30 to which the blade fixing member 2 is attached, and is assembled from a single sheet material 1S, as shown in the exploded view in Figure 17.

[0042] The head portion 30 of the handle body 1 has a mounting portion 31 connected to the tip side of the handle portion 10 via a first fold line 41, and a back plate portion 32 connected to the mounting portion 31 via a second fold line 42 arranged parallel to the first fold line 41. The mounting portion 31 has a mounting surface 31A for attaching the blade fixing member 2, and this mounting surface 31A is formed on the surface opposite to the rear end direction of the handle portion. Note that the first fold line 41 and the second fold line 42 do not necessarily have to be one, and there may be multiple.

[0043] The handle portion 10 has an elongated shape at its rear end and a fan shape that gradually widens towards the front end, with the first fold line 41 located at its edge and connected to the mounting portion 31.

[0044] In this razor R, in particular, as shown in Figures 4 and 16, the back side of the blade fixing member 2 faces the mounting surface 31A of the mounting portion 31 of the handle body 1, and the blade tip 21t of the blade 21 is mounted facing the first fold line 41. In this embodiment, as described above, the blade fixing member 2 is folded back in the direction opposite to the front by the fold line 25 in the area enclosed by the fold line 25 and the slit 26S, so the blade support portion 26 is convex on the back side. However, in this razor R, the blade fixing member 2 is fixed to the mounting surface 31A of the mounting portion 31 via a back portion 24 that is located further back than the blade support portion 26 which is convex on the back side, and the front 23F is mounted to the mounting portion 31 of the handle body 1 in a flat state. Furthermore, since the blade tip 21t is oriented toward the first fold line 41, the front surface 23F of the blade fixing member 2 can be slid across the skin by pulling the handle 10 during use, allowing body hair and other materials to be cut by the blade tip 21t.

[0045] The method of fixing the mounting portion 31 of the handle 1 to the blade fixing member 2 is not limited, but it is desirable to avoid forming unnecessary irregularities on the front surface 23F of the blade fixing member 2, which is the surface that comes into contact with the skin. In the illustrated configuration, the back side of the back portion 24 of the blade fixing member 2 and the mounting surface 31A of the handle 1 are fixed by adhesive tape. Alternatively, they may be fixed by adhesive. In this case, the type of adhesive is not limited, but since the razor R is often used in a manner that it comes into contact with water, it is desirable that it be a water-based or oil-based water-resistant adhesive. They may also be fixed by mechanical fixing means such as rivets at an appropriate position.

[0046] Furthermore, as shown in Figures 6 to 11, the frame 22 in the illustrated form has slits 24S that protrude toward the back piece 24P from two separated points on the fold line F4 located between the long side portion 22L and the back piece 24P. By cutting and raising the area enclosed by these slits and the fold line F4, a protruding piece 24C is formed that protrudes from the position of the fold line F4, which is the ridge line between the long side portion 22L and the back portion 24. On the other hand, as shown in Figures 17 and 18 in particular, slits or punched-out holes 31C into which the protruding piece 24C can be inserted are provided so as to be connected to the first fold line 41 and the second fold line 42 of the head portion 30 of the handle 1. In particular, as shown in Figures 3 and 16, the blade fixing member 2 is positioned and connected to the handle 1 by inserting the protruding piece 24C through the holes 31C. In this embodiment, the blade fixing member 2 is fixed to the handle body 1 by this connection and adhesion between the back side of the back portion 24 and the mounting surface. However, the through hole 31C is not limited to the positions of the first fold line 41 and the second fold line 42, but may be formed on the mounting surface 31A, for example. The position of the through hole 31C can be changed as appropriate. In this embodiment, the length and width of the through hole 31C, and the shape and thickness of the protrusion 24C may be adjusted to make the connection stronger and eliminate the need for separate fixing with adhesive.

[0047] On the other hand, in a particularly preferred form of the handle 1 of this embodiment, as shown in Figures 1 to 5 and 17 to 18, the mounting portion 31 is formed to rise from the handle portion 10 side by bending a straight first fold line 41, and is connected so as to be pivotable around the first fold line 41 as an axis. In other words, the angle between the mounting portion 31 and the handle portion 10 is changeable. As described above, the mounting portion 31 has a mounting surface 31A for attaching the blade fixing member 2, and since this mounting surface is formed on the side opposite to the rear end direction of the handle portion, in this embodiment of the razor, the blade fixing member 2 attached to the mounting surface also moves in accordance with the movement of the mounting portion 31 when it pivots around the first fold line 41 as an axis. That is to say, although the razor R of this embodiment is formed from a single sheet material, it has a pivoting mechanism that allows the blade and blade fixing member to follow curved surfaces.

[0048] Furthermore, the handle body 1 of the razor R in this embodiment is cut and bent from the handle portion 10 with the mounting portion 31 side as the tip, and this cut and bend gives it a tongue portion 50 that generates leaf spring elasticity. The leaf spring elasticity of the tongue portion 50 is adjusted mainly by the elastic deformability such as the rigidity and stiffness of the sheet material, as well as the width and length of the tongue portion 50 and the overall shape of the handle portion 10.

[0049] On the other hand, the back plate portion 32 is folded back at the second fold line 42 and positioned on the rear end side of the handle portion 10 than the mounting portion 31. In particular, the back plate portion 32 is inserted between the cut-up tongue portion 50 and the handle portion 10, and the back plate portion 32 is pressed against by the tongue portion 50. In this illustrated form, the tongue portion 50 not only presses against the back plate portion 32, but is also configured to clamp the back plate portion 32 between itself and the handle portion 10. At this time, if there is a strong force that causes the tongue portion 50 to return to its position before cutting, an elastic biasing force is applied to the back plate portion 32, resulting in a stronger clamping force.

[0050] Structurally, the handle 1 has a mounting portion 31 that can swing around the first fold line 41 as an axis, and a second fold line 42 that is parallel to the first fold line 41. As a result, when the mounting portion 31 moves toward the rear end of the handle portion 10 around the first fold line 41 as an axis, the second fold line 42 moves toward the rear end of the handle portion 10. Consequently, the back plate portion 32 is inserted further toward the base end 51 of the tongue portion 50. Furthermore, as the mounting portion 31 moves toward the rear end of the handle portion 10 around the first fold line 41 as an axis, the mounting portion 31 becomes more upright relative to the handle portion 10. Consequently, not only is the back plate portion 32 inserted toward the base end 51 of the tongue portion 50, but the back plate portion 32 also tries to push up the tongue portion 50. That is, the tongue portion 50 is bent more and more, generating and increasing an elastic biasing force that pushes back against the back plate portion 32. Thus, in this embodiment, an elastic biasing force is generated against the pushing of the tongue portion 50 of the back plate portion 32 toward the base end portion 51 due to the swinging of the mounting portion 31.

[0051] In this case, the handle body 1, in a particularly preferred form, has a handle bending line 11 provided in the center of the width direction on the side opposite to the cutting direction of the tongue portion 50 of the handle portion 10, extending from the rear end to the front end. The handle portion 10 is then bent into a roughly V-shape in the width direction, that is, in a direction perpendicular to the cutting direction of the tongue portion 50, with the cut-up side being the valley side, thus forming a three-dimensional handle portion 10. When the handle portion 10 is V-shaped in this way, it has superior design compared to a flat handle portion, and the operability is improved by a significant margin.

[0052] Furthermore, the bending of the handle portion 10 optimizes the function and cutting / uncutting of the tongue portion 50. That is, when the handle portion 10 is bent into a V shape, the base end portion 51 of the tongue portion 50 is narrowed. As a result, the tip side of the tongue portion 50 is lifted away from the handle portion 10. At this time, it is desirable that the handle portion 10 be bent as described above, as it is lifted towards the valley side. Moreover, if the bending line 11 of the handle portion extends to the base end portion 51 of the tongue portion 50, as shown in the figure, the base end portion 51 of the tongue portion 50 also bends in a slightly curved manner, making it less likely for plastic deformation that would cause it to cease functioning as a spring to occur at the base end portion 51, and making it easier to generate an elastic biasing force.

[0053] Furthermore, in a particularly preferred configuration, the handle 1 is provided with a sliding piece 33 at the tip of the back plate portion 32 that contacts the handle portion 10, and is configured to slide on the handle portion 10 in accordance with the movement of the mounting portion 31. The sliding pieces 33 are provided in pairs so as to contact the positions at both ends that remain when the tongue portion 50 is cut and bent, that is, the positions on either side of the tongue portion 50, thereby enabling stable movement of the back plate portion 32 and adjusting the friction between the back plate portion 32 and the handle portion 10, making it easier to adjust the tongue portion 50 to the desired elastic biasing force on the back plate portion 32.

[0054] Furthermore, in a particularly preferred configuration, the handle body 1 has a notch 12 on the side edge of the handle portion 10. For example, when the handle portion 10 is bent into a V-shape, the distance between the side edges differs slightly between the front and rear ends of the handle portion 10 relative to the notch 12, creating a step at the position of the notch 12. The sliding piece 33, which slides on the handle portion 10 in response to the movement of the mounting portion 31, contacts this step, thereby restricting the back plate portion 32 from moving excessively towards the rear end of the handle portion 10. This prevents the head portion from swinging in an unintended excessive range, thereby enhancing safety during use.

[0055] The size of the handle in this embodiment is not limited to that of a typical razor, but it is preferable that the total length L1 in the unfolded state be 120-138 mm, the total length after assembly be 80-100 mm, the width L2 of the head section be 35-49 mm, and the width L3 of the handle section be 15-20 mm. With these dimensions, it is the size of a typical razor, and a highly durable razor handle can be constructed from sheet material.

[0056] Here, the fold lines on the frame 22 and handle 1 of the blade fixing member 2 are lines that facilitate folding and bending of the sheet material. They may be simple printed lines for positioning, but preferably they are score lines, perforations, or half-slits, also called fold lines. In particular, half-slits are desirable for adjusting the elastic biasing force of the tongue portion, ensuring smooth movement of the mounting portion, ensuring smooth movement of the back plate portion, and facilitating folding. However, it is not necessary for all of them to be of the same type. If through holes 31C are provided at positions that overlap with the first and second fold lines, some may be formed as half-slits and others as cut slits. The fold lines can be appropriately arranged considering the required strength and the stress required for folding. Also, the cut tie ratio when using perforations and the slit depth when using half-slits do not need to be the same.

[0057] As described above, the razor R according to the present invention has a structure in which both the frame 22 of the blade fixing member 2 and the handle 1 can be easily assembled from a single sheet of paper or the like. Furthermore, since everything except the metal blade and rivets can be made of paper material, it is possible to dispose of or recycle the razor without disassembling and separating the razor head, and without separating the razor head from the handle. In other words, regarding recycling, as disclosed in, for example, Japanese Patent Application Publication No. 2020-24485 "Method and System for Recycling Confidential Waste Paper," some waste paper pulp manufacturing processes are equipped with a process for sorting weight-based foreign matter such as metal, and metal blades can be recovered and recycled as resources. Therefore, as described above, the razor R according to the present invention can be disposed of or recycled without disassembling and separating the razor head, and without separating the razor head from the handle, and is superior in terms of effective use of resources. It can also be recycled in the same way as general waste paper.

[0058] Furthermore, in particular, the razor R of this embodiment is configured such that the mounting portion 31 of the handle body 1 can pivot about the first fold line 41 as an axis, and when the second fold line 42 side is pushed toward the handle portion 10, the back plate portion 32 is elastically biased by the tongue portion 50, generating a repulsive force, so that the mounting surface 31A moves with elastic bias relative to the object, and has a pivoting mechanism that follows the skin during use.

[0059] Furthermore, particularly suitable sheet materials 1S and 20 for the frame 22 and handle 1 of the blade fixing member 2 of this embodiment will be described. The sheet materials 1S and 20 according to this embodiment may be any single sheet-shaped material that is easy to transport and store. However, as mentioned above, from the viewpoint of reducing plastic use, it is desirable that it be paper made from pulp fibers. Specifically, corrugated cardboard, coated cardboard, and multilayer paper with multiple paper layers laminated together can be given as examples. Of course, it is even more desirable that it be paper made only from natural material fibers that do not contain synthetic fibers including plastics. Preferably, paper made only from pulp fibers is desirable. It may also have water resistance and oil resistance. In addition, a particularly preferred paper is multilayer paper having three or more paper layers. As shown in Figure 19, since the multilayer paper 90 has multiple paper layers laminated together, the properties of each layer can be changed, making it easy to fold while having strength. For example, by combining a pair of surface layers 91 that are excellent in water resistance and abrasion resistance but are hard and tend to break easily with a flexible middle layer 92, it becomes possible to have excellent toughness and durability, making it easy to fold and assemble while having strength. Furthermore, when each fold line is made into a half-slit, it is easy to form a portion where multiple layers, including the surface layer, are not completely cut, significantly reducing the risk of breakage at each fold line and allowing for flexibility. The multilayer paper 90 can be manufactured by multilayer papermaking. The multilayer paper 90 may be commercially available, for example, Elipla Paper and Elipla Plus manufactured by Dainichi Paper Co., Ltd. From this point of view, in the frame 22 and pattern 1 of this embodiment, it is preferable that they be assembled from multilayer paper, and that the fold lines are half-slits except for parts such as the through-hole 31C.

[0060] The sheet materials 1S and 20 in the frame 22 and handle 1 that constitute the blade fixing member 2 of this razor R may be the same or different. In one embodiment, when the sheet material constituting the handle is paper, its basis weight is preferably 700 g / m². 2 More preferably 750g / m 2 In particular, 800 g / m² is preferred. 2The above is the case. With this basis weight, it is easy to assemble by bending each part, and it is also easy to achieve sufficient rigidity and strength. Although the upper limit value of the basis weight is not limited, there is a risk that creases and wrinkles are likely to occur due to a calendar roll or the like during paper making. From this point of view, regarding the upper limit value, 1400 g / m 2 is preferable, and 1240 g / m 2 is more preferable. The paper thickness is preferably 900 μm or more and 1,400 μm or less, and more preferably 950 μm or more and 1,350 μm or less.

[0061] When the sheet material 20 constituting the frame body 22 constituting the blade fixing member 2 is made of paper, the basis weight is preferably 200 g / m 2 or more, more preferably 230 g / m 2 or more, and particularly preferably 250 g / m 2 or more. With paper of this basis weight, it is easy to assemble by bending each part. Although the upper limit value of the basis weight is not limited, it is 400 g / m 2 . If the basis weight is too high, the rigidity becomes too strong, and it may be difficult to form the blade support portion 26 by bending. The paper thickness is preferably 200 μm or more and 400 μm or less, and more preferably 250 μm or more and 350 μm or less. In the frame body 22 of the present embodiment, since the range surrounded by the fold line 25 and the slit 26S is folded back along the fold line 25 to form the blade support portion 26 and the blade tip exposure port 27, if the thickness is excessive, it is difficult to make a straight fold along the fold line, and the stiffness tends to be excessive, and it may be difficult to accurately form the blade support portion 26. In addition, when attaching the blade fixed to the blade support portion 26 so as to be exposed from the blade tip exposure port 27, if the thickness is excessive, the gap between the skin and the blade tip tends to become wide and it becomes difficult to adjust. Within the above range, it is sufficiently easy to adjust. Further, in the sheet material 20 constituting the frame body 22, it is desirable to be slightly denser than the sheet material 1S constituting the handle body 1 so that stiffness can be easily exhibited. It is easy to form a smooth surface for constituting the front surface that touches the skin, and it is also easy to improve the surface strength.

[0062] The basis weight was measured in accordance with "Paper and cardboard - Method for measuring basis weight" described in JIS P 8124 (2011), and the paper thickness was measured in accordance with "Paper and cardboard - Test method for thickness and density" described in JIS-P8118 (2014).

[0063] When the sheet material 1S,20 in the frame 22 and the handle 1 is made of paper, the constituent pulp fibers of the paper are not necessarily limited, but preferred constituent pulp fibers are softwood kraft pulp such as unbleached softwood kraft pulp (NUKP), semi-bleached softwood kraft pulp (NSBKP), and bleached softwood kraft pulp (NBKP), and hardwood kraft pulp such as unbleached hardwood kraft pulp (LUKP), semi-bleached hardwood kraft pulp (LSBKP), and bleached hardwood kraft pulp (LBKP). Other pulps may be used in appropriate combinations of various known pulps such as recycled paper pulp, hardwood sulfite pulp, softwood sulfite pulp, or pulp chemically or mechanically produced from non-wood fibers such as kenaf, hemp, and reed. It is desirable that the composition of softwood kraft pulp and hardwood kraft pulp be 90-100% by mass, as this facilitates the development of strength. In this case, the mixing ratio of softwood kraft pulp and hardwood kraft pulp is preferably 5:95-30:70. If the razor is to have a design that is clean and has a hard feel, it is particularly preferable to use bleached softwood kraft pulp and bleached hardwood kraft pulp, which are white pulps with high whiteness. The constituent pulps of the sheet material 20 that makes up the frame 22 and the sheet material 1S that makes up the handle 1 may or may not be the same.

[0064] Furthermore, when the sheet materials 1S and 20 in the frame 22 and the pattern 1 are made of a particularly preferred multilayer paper 90, the number of layers is not limited, but is preferably five to nine, and the number of intermediate layers 92 is preferably three or more, especially five. In particular, the form shown in Figure 19 has three intermediate layers 92. It is said that when the total number of intermediate layers 92 is three or more, the toughness and durability of the multilayer paper 90 are more easily expressed. As an upper limit for the total number of intermediate layers 92, it is preferable to have seven or fewer layers from the viewpoint of maintaining interlayer strength. Also, three to seven layers make it easier to operate while maintaining interlayer strength when using a cylinder-wire multi-cylinder type papermaking machine. Note that the number of layers of the sheet material 20 constituting the frame 22 and the sheet material 1S constituting the pattern 1 are not required to be the same.

[0065] Furthermore, when the sheet materials 1S and 20 constituting the frame 22 and pattern 1 are made of multilayer paper 90, the basis weight of the surface layer 91 and the middle layer 92 can be adjusted within the range of the total basis weight when the sheet material is made of paper, and is not particularly limited. However, in the sheet material 1S constituting the pattern 1, the basis weight of the surface layer 91 is preferably 60.0 g / m² per layer. 2 More than 150.0g / m 2 The following are particularly 100-145g / m 2 This is preferable. Also, the basis weight of the entire middle layer 92 is 490 g / m². 2 More than 750g / m 2 The following, in particular, is 600g / m 2 More than 740g / m 2 The following is preferable. In the sheet material 20 constituting the frame 22, the basis weight of the surface layer 91 is preferably 10.0 g / m² per layer. 2 More than 70.0g / m 2 The following, in particular, are 25-55 g / m². 2 This is preferable. Also, the basis weight of the entire middle layer 92 is 140 g / m². 2 More than 340g / m 2 The following, in particular, is 200g / m 2 More than 300g / m 2 The following are preferable.

[0066] Furthermore, when the sheet materials 1S and 20 constituting the frame 22 and the pattern 1 are made of multilayer paper 90, it is preferable that the ratio of the total basis weight of the pair of surface layers 91, 91 to the total basis weight of the multilayer paper 90 is 15.0% or more and 33.0% or less. This results in high rigidity of the pair of surface layers 91 and excellent flexibility of the middle layer 92. Therefore, it is easier to fold at the fold lines and difficult to fold at positions other than the fold lines, making it easier to create a pattern with excellent strength and ease of assembly. Note that it is not necessary for the aforementioned ratio of the sheet material 20 constituting the frame 22 and the sheet material 1S constituting the pattern 1 to be the same.

[0067] When the sheet materials 1S and 20 constituting the frame 22 and the handle 1 are made of multilayer paper 90, the composition of pulp fibers in each layer of the multilayer paper 90 is preferably such that the mass ratio (%) of softwood kraft pulp to hardwood kraft pulp in the surface layer 91 is 0 / 100 or more and 15 / 85 or less. In addition, along with the surface layer 91, the middle layer 92 preferably has a mass ratio (%) of softwood kraft pulp to hardwood kraft pulp of 15 / 85 or more and 35 / 65 or less. A large amount of hardwood kraft pulp, which is rigid and easily densened, is contained, resulting in a surface layer with high density and rigidity, while the middle layer contains a large amount of softwood kraft pulp, which is more flexible than the surface layer. As a result, the handle tends to have less strength loss even when folded at each fold line during assembly and when folded repeatedly. Within this range, the sheet material 20 constituting the frame 22 and the sheet material 1S constituting the handle 1 may have the same or different mass ratios.

[0068] Furthermore, when the sheet materials 1S and 20 constituting the frame 22 and handle 1 are made of multilayer paper 90, it is particularly desirable that the multilayer paper 90 has at least one of a sizing agent and a paper strength enhancer added as a papermaking additive. This makes it easier to adjust to the desired strength. In addition, the multilayer paper 90 may contain various other additives to the extent that it does not impair the effects intended for this invention. For example, polyvinyl alcohol or wax can be applied. In particular, it is desirable that the sheet material 20 constituting the frame be externally coated with a polyvinyl alcohol-based resin such as polyvinyl alcohol and a styrene-acrylic copolymer resin emulsion. Furthermore, it is desirable that paraffin wax be externally coated. These external coatings particularly improve oil resistance. The front part constituting the front surface of the razor that comes into contact with the skin, and the frame, are likely to come into contact with oily components such as soapy water, detergents, and shaving foam in addition to water during use, so it is desirable that the oil resistance is improved by the above additives.

[0069] Examples of sizing agents added to the multilayer paper 90 include styrene-based sizing agents, alkyl ketene dimers (AKD), alkenyl succinic anhydride (ASA), neutral rosin sizing agents, rosin sizing agents, and modified rosin emulsion sizing agents. Among these, rosin sizing agents and modified rosin emulsion sizing agents are preferred. The rosin sizing agent is not particularly limited. Examples of rosin-based substances include reinforced rosins obtained by modifying rosins such as gum rosin, wood rosin, and tall oil rosin with α,β-unsaturated carboxylic acids such as fumaric acid, maleic acid, and acrylic acid, or their anhydrides, and rosin esters obtained by reacting rosins with polyhydric alcohols such as glycerin, trimethylolethane, trimethylolpropane, pentaerythritol, and diglycerin. Rosin sizing agents also include emulsions of these alone or mixtures thereof, and emulsions of these alone followed by a mixture. Furthermore, emulsions to which various polymers are added to further improve sizing properties are also included. The types of sizing agents added to the sheet material 20 that constitutes the frame 22 and the sheet material 1S that constitutes the pattern 1 may be the same or different.

[0070] Various known paper strength enhancers can be used as the paper strength enhancers added to the multilayer paper 90, including polyacrylamide resins, polyamide resins, polyamine resins, acrylic resins, melamine resins, urea resins, and polyamide epichlorohydrin resins. Among these, it is preferable to use an amphoteric paper strength enhancer. Examples of amphoteric polyacrylamides include copolymers of acrylamide with anionic monomers and cationic monomers, Mannich-modified products of copolymers of acrylamide with anionic monomers, and Hoffmann decomposition products. In particular, amphoteric polyacrylamide has a self-fixing function, so even if it is added in excess to improve inter-paper strength, it does not result in an excess of cations, and it can be stably fixed by including it together with a modified rosin emulsion sizing agent. The types of paper strength enhancers added to the sheet material 20 constituting the frame 22 and the sheet material 1S constituting the pattern 1 may be the same or different.

[0071] The amount of sizing agent added is preferably 0.5 kg / t to 5.0 kg / t in solid content. The amount of paper strength enhancer added is preferably 12 kg / t to 30 kg / t in solid content. Note that "kg / t" indicates the mass (kg) per ton of pulp. If the amount of sizing agent added is within this range, the front part 23 that constitutes the front surface of the razor R that comes into contact with the skin, and the frame 22, are likely to come into contact with water during use, so the water resistance is increased and it is easier to maintain sufficient strength. The amount of sizing agent added to the sheet material 20 that constitutes the frame 22 and the sheet material 1S that constitutes the handle 1 may be the same or different.

[0072] Furthermore, when the sheet materials 1S and 20 constituting the frame 22 and pattern 1 are made of multilayer paper 90, it is preferable to add at least one of the above-mentioned sizing agent and paper strength enhancer as a papermaking additive to each layer of the multilayer paper 90, including the surface layer 91 and the middle layer 92. In this case, the amount of sizing agent added to the surface layer 91 is preferably 0.5 kg / t to 5.0 kg / t in solid content. The amount of sizing agent added to the middle layer 92 is preferably 2.0 kg / t to 5.0 kg / t in solid content. The amount of paper strength enhancer added to each layer is preferably 12 kg / t to 30 kg / t in solid content.

[0073] Furthermore, when the frame 22 and handle 1 are constructed from paper sheet materials 1S and 20, it is desirable that the frame 22 and handle 1 contain a siloxane compound. The presence of a siloxane compound increases rigidity, strength, and water resistance due to siloxane bonding. The siloxane compound is not necessarily limited as long as it has siloxane bonding, but since the frame 22 and handle 1 constitute a razor that comes into contact with the human body, it is desirable that they be non-toxic or have low toxicity to living organisms. In addition to coating the assembled frame 22, handle 1, or razor with the siloxane compound, the sheet materials 20 and 1S before assembly, or the sheet material itself, may be impregnated with an appropriate alkoxysilane solution or an alkoxysilane solution processed product, and then heated to incorporate the compound. This is desirable because it allows the siloxane compound to be incorporated in a manner that it is bonded to the pulp fibers themselves or coats the pulp fibers.

[0074] Furthermore, the handle according to this embodiment may be coated or impregnated with a surface protective agent, antibacterial agent, or antiviral agent, as long as it does not excessively alter the coefficient of friction, surface roughness, or foldability, and does not interfere with the functions of the frame 22 and the handle 1, or the effects of the present invention.

[0075] Furthermore, if the sheet materials 1S and 20 constituting the frame 22 and handle 1 are made of paper, the Z-axis strength of that paper, measured in accordance with JAPAN TAPPI Paper Pulp Test Method No. 18-1:2000, must be 400 kN / m². 2 Preferably 450 kN / m2 The above is desirable. The frame 22 and handle 1 in their unfolded state can be easily manufactured by die-cutting such as Thomson processing or cutting with a cutting plotter.

[0076] When the sheet materials 1S and 20 constituting the frame 22 and handle 1 are made of paper, it is desirable that the static friction coefficient of the paper, especially the sheet material constituting the handle 1, be between 0.15 and 0.65 according to the JIS P 8147 ISO horizontal method. This ensures smooth friction between the front surface and the skin during use, and also smooth friction between the tongue and back plate portions of the handle. This measurement method involves taking three measurements each on the back surfaces of the sheet materials and on the front surfaces, and it is desirable that the third measurement values ​​for both back surfaces and front surfaces fall within the above range. The ISO horizontal method only requires measuring at least one of the static friction coefficients of the first slide, the third slide, or the third slide. The static friction coefficient of the third slide tends to be smaller than that of the first slide, and the variation in the static friction coefficient of the third slide is smaller. The sheet material 20 constituting the frame 22 and the sheet material 1S constituting the handle 1 may have the same or different static friction coefficients, but the sheet material constituting the frame 22, which comes into direct contact with the skin, should preferably have a lower static friction coefficient.

[0077] Furthermore, when the sheet materials 1S and 20 constituting the frame 22 and the pattern 1 are made of paper, the paper should preferably have a PPS (Parker Print Surf Roughness) conforming to JIS P 8151, with a thickness of 1 to 8 μm on both the front and back surfaces, more preferably 4 to 7 μm. This ensures smooth friction between the front surface and the skin during use, and smooth friction between the tongue portion and the back plate portion of the pattern. Note that the sheet material 20 constituting the frame 22 and the sheet material 1S constituting the pattern 1 may be made of the same or different PPS.

[0078] When the sheet material constituting the frame and handle is paper, the MMD value of the paper is preferably 5 to 25 for both the front and back surfaces. This ensures smooth friction between the front surface and the skin during use, and smooth friction between the tongue portion and the back plate portion of the handle. The MMD is measured using a friction tester (KES-SE, manufactured by Kato Tech Co., Ltd.) or an equivalent instrument. The friction element used is made of 20 piano wires with a diameter of 0.5 mm, arranged adjacent to each other, and has a contact surface with a length and width of 10 mm. The sheet material 20 constituting the frame 22 and the sheet material 1S constituting the handle 1 may have the same or different MMD values, but the sheet material constituting the frame 22, which comes into direct contact with the skin, should preferably have a lower MMD value.

[0079] Furthermore, when the sheet material 1S constituting the handle 1 is made of paper, the "bending strength" of the paper according to JIS K 7171 is preferably 39 to 45 MPa. Particularly preferably, it is 40 to 42.5 MPa. Within this range, the elastic biasing force of the tongue portion and back plate portion can be appropriately exerted, the mounting surface can easily follow the curved surface of the skin, and excessive surface pressure can be avoided. Furthermore, the "flexural modulus" according to JIS K 7171 is preferably 6500 MPa to 7500 Pa. Within this range, the elastic biasing force of the tongue portion and back plate portion can be appropriately exerted, the mounting surface can easily follow the curved surface of the skin, and excessive surface pressure can be avoided. Note that the "bending strength" and "flexural modulus" are measured at a test speed of 2 mm / min and a support distance of 64 m, and the measured value is the average of 5 measurements.

[0080] Furthermore, if the sheet material 1S constituting the handle 1 is made of paper, it is desirable that the paper has a longitudinal tensile strength of 70 kN / m or more and a transverse tensile strength of 40 kN / m or more, as measured in accordance with JIS P 8113 (2006). Having this tensile strength makes it suitable for folding and assembly.

[0081] Furthermore, if the sheet material 1S constituting the handle 1 is made of paper, it is desirable that the paper has a Taper stiffness of 150 mN·m or more in the longitudinal direction and 70 mN·m or more in the transverse direction, as measured in accordance with JIS P 8125 (2000). Within this range, it is easy to fold and assemble.

[0082] (Second embodiment) Next, the razor R of the second embodiment will be described with reference to Figures 20 to 26. The configurations similar to those of the first embodiment are as described above. The razor R of the second embodiment differs from the razor R of the first embodiment in the structure of the blade fixing member 2. This blade fixing member of the second embodiment has a second blade support portion 26X connected to one of the back pieces 24P via a fold line F6.

[0083] In the second embodiment, as shown particularly in Figures 20-26, the frame 22 is folded back along a fold line F4 from a long side portion 22L that rises from the front portion 23, and positioned opposite the front portion 23. From the back portion 24P, it is further folded along a fold line F6, so that the second blade support portion 26X is positioned opposite and overlapping the blade support portion 26 (hereinafter also referred to as the first blade support portion in this embodiment) formed by cutting and bending. In other words, the first blade support portion 26 extends from the front portion 23 side and the second blade support portion 26X extends from the back portion 24 side between the front portion 23 and the back portion 24, and they are arranged side by side with a predetermined distance between them.

[0084] Furthermore, in this blade fixing member 2, as shown in the figure, the blade 21 is also fixed to the second blade support portion 26X such that its cutting edge 21t is exposed to the cutting edge exposure opening 27. The cutting edges 21t of the blade 21 fixed to the first blade support portion 26 and the cutting edges 21t of the blade 21 fixed to the second blade support portion 26X are positioned to overlap with a staggered position of the cutting edges. In the illustrated configuration, similar to the first embodiment, two blades 21 are fixed to the first blade support portion 26, and one blade 21 is fixed to the second blade support portion 26X, so a total of three blades 21 are fixed to the blade fixing member 2, resulting in a three-blade type razor R. In this way, by providing the second blade support portion 26X, it becomes easier to increase the number of blades 21 that can be fixed.

[0085] On the other hand, in the blade fixing member 2 of the razor R of the second embodiment, a side piece 22P is connected to a back piece 24P to which a second blade support portion 26X is connected, via a fold line F7. The edge of this side piece 22P is formed to widen from the end of the fold line F6 toward the fold line F4, and when the side piece 22P is raised by folding back along the fold line F7 between it and the back piece 24P, the second blade support portion 26X rests on the edge of this side piece 22P and is guided. At the position where the second blade support portion 26X is guided by the edge of the side piece 22P, the position of the cutting edge 21t of the blade 21 fixed to the second blade support portion 26X is set to a predetermined position, and is positioned at an appropriate separation distance from the cutting edge 21t of the blade 21 fixed to the first blade support portion 26.

[0086] The handle 1 and the method of fixing or connecting to the handle 1 in this second embodiment are the same as in the first embodiment. Furthermore, the configuration of the sheet material in the handle 1 and the blade fixing member 2 can also be the same as in the first embodiment described above.

[0087] (Third embodiment) Next, the razor R of the third embodiment will be described with reference to Figures 27 to 34. The configurations of the razor R of the third embodiment are the same as those of the first and second embodiments. The structure of the blade fixing member 2 of the razor R of the third embodiment differs from that of the razor R of the first and second embodiments.

[0088] In this third embodiment, the frame 22 of the blade fixing member 2, as shown in Figures 27 to 29, has a shape in which the sheet material 20 has a substantially rectangular front portion 23 having opposing longitudinal edges 23L, 23L and longitudinal edges 23S, 23S, and a back portion 24 that is connected to the front portion 23 via a fold line F8 and overlaps the front portion 23 when folded back along this fold line F8. In the illustrated form, the fold line F8 is located at the position of one of the longitudinal edges 23S, but the fold line F8 may also be located at the position of the longitudinal edge 23L. Furthermore, the outer edge shapes of the front portion 23 and the back portion 24 do not necessarily have to be the same, but it is desirable that they both be rectangular or similar in shape, as in the illustrated form.

[0089] Furthermore, the front portion 23 of the frame 22 in the third embodiment is provided with a front-side opening 27A for exposing the cutting edge 21t of the blade 21, and one or more front-side grooves 26A are formed on both short edges of the front-side opening 27A. The front-side grooves 26A, 26A provided on each short edge 23S are paired, and the lines connecting the paired grooves are arranged to be parallel to the longitudinal direction of the front portion 23. In the illustrated form, three front-side grooves 26A are formed on each short edge, and they are arranged so that the spacing distance between the lines connecting the paired grooves is approximately equal.

[0090] On the other hand, the frame of this third embodiment has a rear opening 27B on the rear portion 24, and one or more rear grooves 26B are formed on both short edges of the rear opening 27B. The rear grooves 26B, 26B provided on each short edge also form pairs, and the lines connecting these pairs of grooves are arranged to be parallel to the longitudinal direction of the front portion 23. In the illustrated form, three rear grooves 26B are formed on each short edge, and they are arranged so that the distance between each pair of lines is approximately equal.

[0091] In the third embodiment, the frame 22 has corresponding front grooves 26A and rear grooves 26B, and together they form a blade support groove 26V for supporting the blade from the front to the rear. In the blade fixing member 2 of the third embodiment, the base end of the blade is fitted into and supported by this blade support groove 26V. In the illustrated configuration, since there are three rear grooves 26B and three front grooves 26A on each short edge side, the frame 22 has three pairs of blade support grooves 26V, and three blades 21 are supported.

[0092] Furthermore, in this embodiment, the frame 22 has a shorter distance between the rear grooves 26B than the distance between the corresponding front grooves 26A. As a result, the rear grooves 26B are located slightly closer to the longitudinal center of the front portion 23 than the corresponding front grooves 26A. This restricts the base edge of the blade 21 from moving further back than the position of the rear grooves 26B, and ensures that the cutting edge 21t of the supported blade 21 is exposed at an appropriate position from the front opening 27A.

[0093] On the other hand, in the third embodiment, as shown in Figure 30, it is desirable that the tip of the blade 21 on the cutting edge side bends so that the angle of the blade with respect to the direction of movement of the front part 23 during use, that is, the direction in which the razor R is applied to the skin and slid, does not become excessively large, that is, the blade does not become excessively upright, and contacts the skin at an appropriate angle. The angle of this bending is not limited, but can be appropriately determined by the depth, width, etc., of the blade support groove 26V, which is composed of the front groove 26A and the back groove 26B. Preferably, it is desirable to adjust the angle of the cutting edge with respect to the sliding direction to 20 to 25 degrees, preferably 22 to 24 degrees.

[0094] The method of fixing the frame 22 and the blade 21 is not limited. For example, the base end of the blade 21 can be bonded and fixed to the blade support groove 26V with a water-resistant adhesive that can bond paper and metal. A preferred embodiment is the one shown in Figure 31, in which the blade 21 is fixed by a fixing frame 28F.

[0095] As shown in Figure 31, the fixing frame 28F is made of a single sheet material and has a roughly rectangular shape with a cutout in the center. It is slightly narrower than the longitudinal distance of the front portion 23, and the width L10 of the cutout portion 28M is slightly narrower than the width L11 of the front opening 27A. As shown in Figures 32 to 34, the fixing frame 28F is assembled so that the front opening 27A of the front portion 23 is located in the cutout portion 28M, and the front portion 23 and the back portion 24 are wrapped along the short edges and the thickness direction which is also the lamination direction between the front portion and the back portion. The edges are then bonded together at an appropriate position on the back side, and the blade support groove 26V is covered from the front side, thereby fixing the blade 21 by pressing down on both ends of the blade 21. At this time, the front portion 23 and the back portion 24 can also be fixed in a laminated and integrated state that cannot be separated. Furthermore, the lamination and integration of the front section 23 and the back section 24 may be achieved not only by fixing the frame 28F, but also by attaching the inner surface of the laminated section with adhesive or double-sided adhesive tape.

[0096] On the other hand, the frame 22 of the razor R in the third embodiment is formed by laminating and integrating the front portion 23 and the back portion 24, and does not have short or long side portions, so it is desirable that it be made of a sheet material that is thicker than that of the first and second embodiments. For the sheet material 20 that constitutes the front portion 23 and the back portion 24 in the third embodiment, it is desirable to use a sheet material that is more rigid and thicker and suitable for the handle 1, rather than a sheet material suitable for the frame in the first embodiment. The suitable sheet material is the same as the sheet material suitable for the handle 1 described in the first embodiment. The sheet material suitable for constituting the fixed frame 28F is the same as the sheet material that constitutes the frame in the first embodiment.

[0097] (Fourth embodiment) Next, the razor R of the fourth embodiment will be described with reference to Figures 35 to 40. Note that the configuration is the same as that of the first embodiment as described above, and only the differences will be explained. The razor R of the fourth embodiment differs from the razor R of the first embodiment in the structure of the handle 1. Specifically, there are differences in the structure of the back plate and the resulting generation of elastic biasing force from the tongue portion 50 to the back plate portion 32.

[0098] In this fourth embodiment, the handle 1 of the razor R, as shown in Figures 35, 36, and 38, has a back plate portion 32 which has a convex slit 32S toward the second fold line 42, and a tip portion 32E which is connected to the end of the slit 32S and surrounded by a pair of third fold lines 43 parallel to the second fold line 42 and a tip edge. The tip portion is folded back by the third fold lines 43 toward the handle portion and is folded over the portion between the second fold line 42 and the third fold lines 43. This folding reverses the portion surrounded by the convex slit 32S, forming a dish-shaped depression on the folded edge of the back plate portion 32. In the illustrated shape, the shape of the slit is a curved semi-ellipse, but the specific shape of the slit is not limited.

[0099] The convex slit 32S is formed in the direction of the extension of the tip of the tongue portion 50, and the recess is formed at the position where the tongue portion 50 rests. In this fourth embodiment, the dish-shaped recess of the back plate portion 32 is inserted between the tongue portion 50 and the handle portion 10. In other words, this recess serves as a receiving portion 34 that receives the tongue portion 50. In the fourth embodiment, the back plate portion 32 is held in a manner in which the tongue portion 50 rests on the receiving portion 34. Furthermore, since a wall equal to the thickness of the back plate portion 32 is formed on the second fold line 42 side of the receiving portion 34, the movement of the back plate portion 32 is restricted at a position where the tip of the tongue portion 50 resting on the receiving portion 34 contacts the wall portion 35. Therefore, the mounting portion 31 is prevented from tilting excessively towards the rear end of the handle portion 10. For this reason, the notch portion 12 does not need to be provided in the fourth embodiment.

[0100] In this fourth embodiment, the configuration of the first fold line 41, the second fold line 42, the mounting portion 31, and the mounting surface 31A of the handle 1 of the razor R is the same as in the first embodiment. A razor R to which the blade fixing member 2 of the second and third embodiments is attached to the handle 1 of this fourth embodiment is also a razor R according to the present invention. Furthermore, the sheet material suitable for the handle 1 in this embodiment is the same as in the first embodiment. [Explanation of Symbols]

[0101] R...razor, 1...handle, 2...blade fixing member, 20...sheet material related to the frame of the blade fixing member (frame in unfolded state), 21...blade, 21S...spacer, 21t...blade tip, 22...frame, 22S...short side part, 22L...long side part, 22P...side piece, 22F...flap, 23...front part, 23F...front, 23L...long edge, 23S...short edge, 24...back part, 24F...back flap part, 24P...back piece, 24e...locking edge, 24t...locking piece, 24S...slit, 24C...convex piece, 26A...front side recessed groove, 26B...back side recessed groove, 25...fold line, 26,26X...blade support part, 26S...slit, 26e... Lid end, 26V...blade support groove, 27...blade tip exposure opening, 27A...front opening, 27B...rear opening, 28...crimp, 28H...crimp head, 28...fixing frame, 28M...cutout section, 1S...sheet material related to the handle (handle in unfolded state), 10...handle section, 11...handle section fold line, 12...notch section, 30...head section, 31...mounting section, 31A...mounting surface, 31e...edge of mounting section, 32...back plate section, 32S...slit, 33...sliding piece, 41...first fold line, 42...second fold line, 43...third fold line, 50...tongue section, 51...base end of tongue section, 31C...through hole, F1~F8...fold lines.

Claims

1. A razor having a blade fixing member and a handle, The blade fixing member is, It comprises a blade, a frame assembled from a sheet material having a blade support section to which the blade is fixed, and a blade tip exposure opening through which the cutting edge of the blade fixed to the blade support section is exposed, The pattern is Assembled from sheet material, The handle portion is held by the user, It has a head portion to which a blade fixing member is attached, The head section is, A mounting surface for attaching the blade fixing member, and a mounting part connected to the tip of the handle portion via a first fold line, which is pivotable about the first fold line as an axis, It has a back plate portion which is connected to the mounting portion via a second fold line which is arranged parallel to the first fold line, and which is folded back by the second fold line and is located on the rear end side of the handle portion than the mounting portion, The mounting portion is cut and bent from the handle portion, with the mounting portion being the tip. This cutting and bending creates a tongue portion that generates leaf spring elasticity. The back plate portion, folded back along the second fold line, is inserted between the cut and bent tongue portion and the handle portion. The tongue portion presses against the back plate portion and is configured to generate elastic bias against the back plate portion being pushed toward the base end of the tongue portion due to the swinging of the mounting portion. The blade fixing member is attached to the handle in a direction such that the blade tip faces the first fold line. A razor characterized by the following features.

2. The blade fixing member is, Front section having an opening for the blade tip and It has a rear section opposite the front section, The blade support section is formed between the front and back sections by cutting and bending a portion of the sheet material toward the back side. The blade tip exposure opening is formed by cutting and bending the blade support portion, The back of the blade fixing member is attached to the mounting surface of the handle. The razor according to claim 1.

3. The blade fixing member is, It has a second blade support part connected to the rear part, The second blade support is bent towards the front and positioned opposite the blade support formed by cutting and bending. The blade is also fixed to the second blade support, The blade tip is exposed at the blade tip exposure opening. The cutting edge of the blade fixed to the blade support, The cutting edge fixed to the second blade support, The blades are positioned so that they overlap with a slight offset. The razor according to claim 2.

4. The razor according to claim 2 or 3, wherein the movement of the blade support is restricted by the back portion.

5. The frame is It has a front portion having a blade tip exposure opening, a rear portion facing the front portion, a rear side opening formed in the rear portion, one or more front side grooves formed on the edge of the blade tip exposure opening, and one or more rear side grooves formed on the edge of the rear side opening, The front and back sections are connected via a fold line, and the folding along this fold line positions the front and back sections opposite each other. A blade tip exposure opening is formed connecting the front and back sections by a blade tip exposure opening and a rear-side opening, and a blade support groove is formed by a front-side recess and a rear-side recess, supporting the blade. The blade is supported by fitting into the blade support groove. Furthermore, the back portion of the blade fixing member is attached to the mounting surface of the handle. The razor according to claim 1.

6. The tongue portion holds the back plate portion between itself and the handle portion. A sliding piece is provided at the tip of the back plate portion, which contacts the handle portion, and the sliding piece slides on the handle portion in accordance with the movement of the mounting portion, as described in claim 1.

7. The back panel is, The tip portion, enclosed by a convex slit toward the second fold line and a pair of third fold lines connected to the end of this slit and parallel to the second fold line, is folded back along the third fold lines. The portion surrounded by the convex slit has a receiving portion formed by inversion, and the tongue portion rests on and presses against this receiving portion. The razor according to claim 1.

8. A blade fixing member that is attached to the handle of a razor, The blade fixing member comprises a blade and a frame assembled from a sheet material, having a blade support portion to which the blade is fixed and a blade tip exposure opening through which the cutting edge of the blade fixed to the blade support portion is exposed. The frame has a front section with an opening for the blade tip to be exposed, and a back section opposite the front section. The blade support portion is formed by cutting and bending a part of the sheet material toward the rear side, creating a gap between the front and rear sections. The blade tip exposure opening is formed by opening it toward the front section through the cutting and bending of the blade support portion. It is attached to the handle via the back. A blade fixing member characterized by the following features.

9. It has a second blade support part connected to the rear part, The second blade support is bent towards the front and positioned opposite the blade support formed by cutting and bending. The blade is also fixed to the second blade support, The blade tip is exposed at the blade tip exposure opening. The cutting edge of the blade fixed to the blade support, The cutting edge fixed to the second blade support, The blades are positioned so that they overlap with a slight offset. The blade fixing member according to claim 8.

10. The blade fixing member according to claim 8 or 9, wherein the movement of the blade support is restricted by the rear portion.

11. A blade fixing member that is attached to the handle of a razor, The blade fixing member comprises a blade and a frame assembled from a sheet material, having a blade support portion to which the blade is fixed and a blade tip exposure opening through which the cutting edge of the blade fixed to the blade support portion is exposed. The frame is It has a front portion having a blade tip exposure opening, a rear portion facing the front portion, a rear side opening formed in the rear portion, one or more front side grooves formed on the edge of the blade tip exposure opening, and one or more rear side grooves formed on the edge of the rear side opening, The front and back sections are connected via a fold line, and the folding along this fold line positions the front and back sections opposite each other. An opening is formed connecting the front and back sections by the blade tip exposure opening and the back side opening, and a blade support groove is formed by the front side recess and the back side recess. The blade is supported by fitting into its support groove. Furthermore, it is attached to the handle via the back. A blade fixing member characterized by the following features.

Images