Shaving razor

Abstract

The razor according to the present application is provided with a grip portion held by a user, a head support portion formed integrally with the grip portion, and a razor head portion loaded to the head support portion, and is assembled by bending, wherein the grip portion and the head support portion are all formed of paper, the razor head portion is formed of metal as a whole and has a blade body and a frame body which accommodates the blade body, the head support portion has two end support portions which support at least both end portions of the razor head portion in a width direction, the frame body has a cutout portion at at least a part of a peripheral edge portion, the cutout portion is formed from an opposite side to the head support portion, hair cut by the blade body is able to pass through, and a force point portion when the razor head portion is detached from the head support portion is provided.

Description

[0001] This application is a divisional application of the Chinese national phase patent application with application number 2020800674900, which was filed on November 4, 2020, with international application number PCT / JP2020 / 041257 and international application date of November 4, 2020, entitled "Razor". The Chinese national phase application entered on March 24, 2022. Technical Field

[0002] One aspect of the present invention relates to an assembled razor. Background Technology

[0003] Existing razors typically consist of a main body that integrates the head and handle, and a razor head that houses the metal blades within a resin casing. The main body is mostly made of resin or metal, requiring a large volume for storage, which presents challenges in terms of storage space and portability.

[0004] In recent years, the concept of 3Rs—Reduce (using things wisely and reducing waste), Reuse (reusing usable things), and Recycle (reusing waste as a resource)—has been promoted. While existing razors are made of resin and metal, there is a growing demand for replacement with easily recyclable materials. For example, razors that replace resin in their main body with paper are considered environmentally friendly and contribute to a circular economy. Furthermore, the 17 targets of the UN Sustainable Development Goals (SDGs) outline sustainable production and consumption patterns, aiming to significantly reduce waste generation. In this context, there is also a desire to advance the development of environmentally friendly razors that meet the 3Rs. For example, razors made from easily renewable resources such as paper in their main body are expected to be environmentally friendly technologies that meet the 3Rs. Razors using such paper have been disclosed in patent documents 1 through 12, for example.

[0005] Existing technical documents

[0006] Patent documents

[0007] Patent Document 1: UK Patent Application Publication No. GB2260927

[0008] Patent Document 2: U.S. Patent No. 5033191

[0009] Patent Document 3: Japanese Patent Application Publication Nos. 52-564

[0010] Patent Document 4: Japanese Patent Application Publication No. 1-15086

[0011] Patent Document 5: Utility Model Registration No. 3018821

[0012] Patent Document 6, Japanese Patent Application Publication No. 2006-263048

[0013] Patent document 7, Japanese Patent Application Publication No. 2000-157763

[0014] Patent Document 8: U.S. Patent No. 5,027,510

[0015] Patent Document 9: U.S. Patent No. 5,274,922

[0016] Patent document 10, Japanese Patent Publication No. 2017-520317

[0017] Patent document 11, Utility Model Application Publication No. 3-128065

[0018] Patent document 12, Japanese Patent Application Publication No. 2000-334184 Summary of the Invention

[0019] Although the razors described in Patent Documents 1-12 are constructed using paper or similar materials and are environmentally friendly, they have the following problems. Patent Documents 1-7 disclose razors where the main body is a roughly rectangular plate shape before assembly. However, in these razors, because the plate constituting the main body is roughly rectangular before assembly, while it is easy to form, the design freedom is limited, and the main body becomes larger than needed. In such a structure where the main body is larger than needed, the amount of material such as paper used to constitute the main body increases, making it difficult to say that it is environmentally friendly. Furthermore, in the razors described in Patent Documents 8-11, although the main body shape is not roughly rectangular before assembly, it is a structure combining a roughly rectangular plate with a simple-shaped plate. Therefore, the amount of paper or similar materials used as the main body's constituent material cannot be sufficiently reduced. Furthermore, in the razor described in Patent Document 12, the lower part of the support portion 6 is roughly rectangular, and the amount of paper or similar materials used as constituent materials cannot be sufficiently reduced.

[0020] Furthermore, since the razors described in Patent Documents 1-12 involve a structure assembled by the user repeatedly bending the plate-shaped main body, the assembly requires considerable time and the assembly method becomes complex. Therefore, there is no structure that allows the user to use the razor without complex operations, thus making it easy to assemble.

[0021] However, in the conventional razors described in the aforementioned patent documents, including Patent Documents 11 and 12, the overall shape of the main body is not a generally rectangular plate before assembly, but in the assembled state, the lower end of the handle (main body plate 1 or support portion 6) is formed as a straight line. For example, when a user picks up these razors, this straight lower end may come into contact with the user's fingers. Furthermore, depending on how the user holds the razor, the user may grasp this straight lower end. When the user grasps and comes into contact with this straight part formed by paper or the like, the user will feel discomfort. Thus, there is a situation where conventional razors do not adequately consider designing a structure to avoid user discomfort.

[0022] Furthermore, one purpose of using razors with paper bodies is resource recycling, but when recycling used razors, it is desirable to separate them according to different materials such as paper, resin, and metal. However, even if the main body of existing razors is entirely made of paper, disregarding the removal of the razor head from the main body, separation of the main body and razor head is difficult due to the strong adhesion between them. Even assuming separation is possible, the razor head will break. Moreover, even if the main body and razor head can be separated, the razor head contains resin and metal materials, resulting in a mixture of these materials. To promote material recycling, it is desirable to perform recycling simply and economically, but this is difficult when multiple materials are mixed. The existing razor heads described above cannot be said to adequately classify the materials at the time of disposal and take into account the ease of separation of each material, making it difficult to effectively recycle used razors.

[0023] Furthermore, in conventional razors, such as those described in Patent Document 12, the rectangular blade 8 to which the razor blade 7 is fixed has an angle with the gently curved outer surface 33 forming the head. Therefore, it is difficult for the user to operate the handle and press the razor blade against the skin at an angle that contacts the skin. Moreover, when external force is applied to the blade, there is a possibility that the blade or razor head may detach from the end of the paper-made head, or that part of the main body may break due to external force. Since this structure is common in the aforementioned patent documents other than Patent Document 12, it is a common problem with conventional razors whose main body is made of paper.

[0024] The purpose of this invention is to provide a razor that can solve the above-mentioned problems.

[0025] To address the aforementioned problems, the present invention provides a razor with the following structure. Furthermore, in the following description, reference numerals in the drawings are enclosed in parentheses for ease of understanding; however, the constituent elements of the invention are not limited to these specific structures and should be broadly interpreted as falling within the scope that can be technically understood by those skilled in the art.

[0026] One aspect of the present invention is a razor comprising a grip portion for a user to hold, a head support portion integrally formed with the grip portion, and a razor head mounted on the head support portion, which are assembled by bending, wherein...

[0027] Both the grip and the head support are made of paper.

[0028] The razor head is entirely made of metal and has a blade body and a frame for housing the blade body.

[0029] The head support portion has end supports that support at least two ends of the razor head in the width direction.

[0030] The frame has a cutout at least a portion of its periphery, which is formed from the side opposite to the head support, through which hair cut by the blade can pass, and has a force point for disengaging the razor head from the head support.

[0031] According to the above-described structure, the metal razor head easily detaches from the paper grip and head support, allowing for easy sorting and recycling. In particular, the structure includes a cutting section that facilitates easy detachment and prevents cut hair from remaining inside the razor head, providing a razor that is simple in structure, easy to recycle based on sorting, and simultaneously clean and comfortable to use.

[0032] Of the aforementioned razors, the preferred one is...

[0033] The head support portion is not located at least a portion of the part opposite the cut portion.

[0034] The shaver with the above structure is designed so that the shaving head easily contacts the cutting edge when the user detaches it from the head support, making it easier to sort and discard the shaver. Furthermore, because the cut hair easily passes through the cutting edge, it further reduces hair residue inside the shaver head, allowing for cleaner and more comfortable use.

[0035] Of the aforementioned razors, the preferred one is...

[0036] The razor head has an opening through which hair cut by the blade body can pass.

[0037] The opening is located on the surface opposite to the head support and in a location where the head support is not in a corresponding position.

[0038] Since the cut hair also passes through the opening, the razor with the above structure can further suppress hair residue in the razor head, making it a cleaner and more comfortable razor to use.

[0039] Of the aforementioned razors, the preferred one is...

[0040] The razor head is bonded to the head support on the side of the edge that is opposite to the edge formed by the cutting portion.

[0041] The shaver with the above structure is designed to easily transmit the force that causes the shaver head to detach from the head support when the user applies force to the cutting area, thus facilitating the sorting and disposal of the shaver head.

[0042] Of the aforementioned razors, the preferred one is...

[0043] The frame includes a front housing and a rear housing, the front housing having an opening for the exposed blade and the cutout portion.

[0044] The front housing is box-shaped and open on the side opposite to the rear housing.

[0045] The rear housing is box-shaped and open on the side opposite to the front housing.

[0046] The front housing is configured to cover the rear housing.

[0047] The edge of the front housing forming the cut portion has a distance of 0.5 mm to 3 mm from the edge of the rear housing opposite to the cut portion.

[0048] The shaver with the above structure is designed so that it can easily come into contact with the cutting edge when the user detaches the shaver head from the head support, thus making it easier to sort and discard.

[0049] Of the aforementioned razors, the preferred one is...

[0050] The shaver head is directly bonded to the two end supports in the bonding area of ​​the frame, excluding the non-bonding area set at a specified distance from the periphery.

[0051] A shaver with the above structure can be configured such that the shaver head can be easily separated from the head support because the periphery of the shaver head is not attached to the head support.

[0052] Of the aforementioned razors, the preferred one is...

[0053] At least a portion of the adhesive area of ​​the frame is planar.

[0054] The shaver with the above structure can be designed so that even in a relatively small bonding area, the shaver head can be bonded to the head support at a temperature, making it easy to assemble and comfortable to use.

[0055] Of the aforementioned razors, the preferred one is...

[0056] The head support portion also has a triangular portion in a triangular shape formed between the two end supports and the grip portion.

[0057] In its state before assembly,

[0058] The head support and the gripping part are planar.

[0059] The grip portion is formed along a length direction intersecting the width direction, symmetrical with respect to a center line extending along the length direction, and has a tapering shape that connects to the triangular portion of the head support portion and branches along the connection portion with the triangular portion. The triangular portion has a narrow section that narrows in the width direction near the vertex intersecting the center line, and is formed to extend along the width direction from the narrow section toward an end opposite to the connection portion. The end is curved, with a center crease forming along the center line from the vertex to the end, and a connecting crease forming along the connection portion.

[0060] The shaver head has rectangular and planar portions near both ends in the width direction, and these rectangular planar portions are adhered to the front sides of the end support portions.

[0061] It has a bending portion that protrudes outward along the edge of the grip portion and is capable of bending towards the centerline.

[0062] The bent portion has a width smaller than the width of the grip portion.

[0063] During assembly, the user bends the head support along the connecting crease and the center crease, thereby tilting the head support towards the rear side relative to the center line.

[0064] In its assembled state,

[0065] The portion along the center line of the grip portion forms the back, and the edge of the grip portion forms the abdomen.

[0066] The head support portion, which is continuous from the back, becomes flexed towards the abdomen.

[0067] One aspect of the present invention is a razor comprising a grip portion for a user to hold, a head support portion integrally formed with the grip portion, and a razor head mounted on the head support portion, which are assembled by bending, wherein...

[0068] Both the grip and the head support are made of paper.

[0069] The razor head is made entirely of metal.

[0070] In its state before assembly,

[0071] The head support and the gripping part are planar.

[0072] The head support portion has two end support portions that support at least two ends of the razor head in the width direction, and a triangular portion in a triangular shape formed between the two end support portions and the grip portion.

[0073] The grip portion is formed along a length direction intersecting the width direction, symmetrical with respect to a center line extending along the length direction, and has a tapering shape that connects to the triangular portion of the head support portion and branches along the connection portion with the triangular portion. The triangular portion has a narrow section that narrows in the width direction near the vertex intersecting the center line, and is formed to extend along the width direction from the narrow section toward an end opposite to the connection portion. The end is curved, with a center crease forming along the center line from the vertex to the end, and a connecting crease forming along the connection portion.

[0074] The razor head has rectangular and substantially planar portions near both ends in the width direction, and these rectangular planar portions are adhered to the front sides of the end support portions.

[0075] It has a bending portion that protrudes outward along the edge of the grip portion and is capable of bending towards the centerline.

[0076] The bent portion has a width smaller than the width of the grip portion.

[0077] During assembly, the user bends the head support along the connecting crease and the center crease, thereby tilting the head support towards the rear side relative to the center line.

[0078] In the assembled state,

[0079] The portion along the center line of the grip portion forms the back, and the edge of the grip portion forms the abdomen.

[0080] The head support portion, which is continuous from the back, becomes flexed towards the abdomen.

[0081] The razor with the above structure, which has a narrow section in the grip and extends in width from the narrow section towards the end opposite to the head support, allows for rounded corners instead of a rectangular shape, thus reducing paper usage. Furthermore, by not making the razor rectangular, design freedom is increased, and the main body becomes more compact. Moreover, the narrow section prevents the user's index finger and thumb from slipping off from below when using the razor, even though the user's index finger and thumb are near the narrow section.

[0082] Furthermore, a central crease is formed along the centerline from the apex to the end, and a connecting crease is formed along the connecting portion. During assembly, the user bends along the connecting crease and the central crease. When bending the grip along the central crease, the connecting crease connected to the central crease can also be bent effortlessly. Similarly, during assembly, when bending the grip along the connecting crease, the central crease connected to the connecting crease can also be bent effortlessly. That is, for example, the user can assemble the shaver with one click, reducing the time required for shaver assembly and making shaver assembly easy. Thus, a structure can be made that allows the user to reach a usable state of the shaver without performing complicated operations. In addition, when bending along the connecting crease, the head support can bend smoothly towards the abdomen and sides.

[0083] Furthermore, in the razor with the aforementioned structure where the end opposite to the head support is curved, the area around that end can be rounded instead of forming a straight line when assembled. Therefore, for example, even if the user's fingers touch the area around that end, discomfort can be minimized depending on how the razor is held, even if the user grips the lower end. In other words, a razor that avoids user discomfort can be provided.

[0084] Furthermore, the shaver head of the above-described structure has rectangular and substantially planar rectangular planar portions near both ends in the width direction. By bonding these two rectangular planar portions to the front of the end support portions, the shaver head and the end support portions can be bonded with a moderate strength that takes into account easy peeling. Therefore, since the main body and the shaver head can be easily separated without damaging the shaver head, a shaver that prevents the shaver blade from being exposed during separation and ensures safety can be provided.

[0085] Furthermore, by folding the head support portion continuously from the back towards the abdominal side in the assembled state of the above-described structure, with the shaver head positioned on the back side surface of the two end supports, the shaver head can be made approximately parallel to the back side surface of the two end supports. Therefore, when the user operates the grip, the shaver head blades can be pressed against the skin at an angle that contacts the skin surface. Moreover, unlike existing structures where the external force is received in a direction approximately orthogonal to the back side surface of the two end supports, the external force can be received along this surface when external force is applied to the blades. This prevents the shaver head from detaching from the head support portion or a part of the main body from being damaged by external force.

[0086] Furthermore, by incorporating the aforementioned structure, a bent portion that protrudes outward along the edge of the grip and can bend towards the centerline, and by having a width smaller than the grip itself, the grip's belly is formed into a round shape, thus enabling the grip to be easily held by the user. Moreover, since no sharp parts are formed on the belly where the user's fingers are likely to come into contact, a razor that prioritizes safety can be provided.

[0087] Of the aforementioned razors, the preferred one is...

[0088] It also includes a head fixing part disposed on the side opposite to the gripping part of the head support and bent to fit into the gripping part or the head support.

[0089] According to the structure described above, the rigidity of the grip or head support can be increased by fitting with the head fixing part, thus stabilizing the position of the shaver head. Therefore, although this shaver is made of paper, it can be used with the same high-rigidity feel as other shavers whose grip or head support is made of resin or metal.

[0090] Of the aforementioned razors, the preferred one is...

[0091] The gripping part is assembled in a polygonal manner with a cross section in a plane intersecting the length direction.

[0092] The razor with the above structure can suppress shape changes of the grip when held, thus stabilizing the shape of the grip. As a result, the grip can be easily held, and although the razor is made of paper, it can be used with the same feel as other high-rigidity razors whose grip or head support is made of resin or metal.

[0093] Of the aforementioned razors, the preferred one is...

[0094] In its pre-assembly state, the gripping portion has an elongated hole extending along the length direction.

[0095] In a razor with the above structure, when the user's fingertip touches the elongated part, friction occurs between the edge of the elongated part and the user's finger, creating a space for the user to rest their fingers. This prevents slippage and makes the razor easier to hold.

[0096] Of the aforementioned razors, the preferred one is...

[0097] A portion of the grip side of the razor head protrudes from the two end supports toward the grip side.

[0098] After use, the razor head can be detached from the head support.

[0099] In the aforementioned patent documents, such as the razors described in Patent Documents 3-5, the blade is directly installed in the body structure. If the metal blade can be separated from the paper body, it can be sorted and disposed of. However, since recycling is not considered in these structures, the blade is either exposed or strongly adhered to the body, thus failing to consider the safety of users who wish to separate the body and razor head for recycling. Among such razors, there are those that address safety by folding the paper body in half and wrapping the blade, but these razors do not consider recycling.

[0100] The structure described above allows a portion of the razor head's grip side to protrude from the end supports towards the grip side. This allows the razor head to detach from the head support after use. During assembly, when bending along the connecting crease, the grip side of the razor head can separate along the tapering shape of the connecting crease branch, exposing this portion. Because a part of the razor head is easily placed for the user's fingers, the user can safely separate the razor head from the head support by placing their fingers on this grip side. Furthermore, since the razor head is entirely made of metal after separation, while the grip and head support are integrally formed of paper, the razor head can be separated from the razor with just one hand, allowing the used razor to be categorized as either metal or paper. This facilitates easy separation by material and enables simple and economical recycling. In other words, it provides a razor that considers the safety of users who wish to separate the main body and razor head for recycling while improving the efficiency of recycling.

[0101] Furthermore, by bonding a portion of the razor head to the two end supports of the head support in a manner that protrudes from the two end supports towards the grip side, the razor head can be positioned near the apex of the triangular portion. Since the area near the apex of the triangular portion suppresses deformation when an external force is applied to the head support in the bending direction, in the assembled state, the bending of the head support towards the ventral side in the bending direction can be moderately suppressed, thus stabilizing the position of the razor head in the bending direction.

[0102] Of the aforementioned razors, the preferred one is...

[0103] The head support and the grip are configured such that when the user brings the razor head into contact with the skin, the razor head elastically deforms to apply force to the user's skin.

[0104] According to the above structure, the paper-formed head support and grip have moderate elasticity, which can suppress excessive pressure on the skin.

[0105] Of the aforementioned razors, the preferred one is...

[0106] The gripping part has:

[0107] An insertion portion formed on one side relative to the center line, deformed by pressing; and

[0108] The insertion hole, which is formed in the assembled state at a position opposite to the insertion part and deformed by pressing, is located on the other side of the center line.

[0109] In the assembled state, the insertion part is inserted into the insertion hole and fitted, thereby fixing the gripping part in a bent state along the center crease.

[0110] According to the shaver with the above structure, in its assembled state, since the insertion part and the insertion hole part can be fitted together to suppress the opening of the ventral side of the grip part due to the elasticity of the paper in the central fold portion, the grip part can be maintained in a shape that is easy for the user to hold. In addition, since the bending of the head support part back to the back side can be suppressed, the head support part can be maintained in a state of moderate bending relative to the grip part.

[0111] Of the aforementioned razors, the preferred one is...

[0112] The gripping part has:

[0113] In its assembled state, it forms an incision opening from the back towards the abdomen.

[0114] The grip is secured by bending the cut-out portion so that it is bent along the center crease.

[0115] According to the structure described above, in its assembled state, the grip can be maintained in a shape that is easy for the user to hold because the elasticity of the paper at the central fold can be suppressed from causing the ventral side of the grip to open. Furthermore, because the bending of the head support can be suppressed from returning to the back side, the head support can be maintained in a state of moderate bending relative to the grip.

[0116] Preferably, the razor described above also includes:

[0117] In its pre-assembly state, it forms a protrusion that extends outward from one of the two edges of the gripping portion; and

[0118] The cut portion formed on another of the aforementioned edges,

[0119] In the assembled state, the protrusion is inserted into the cutout and fitted, thereby fixing the grip in a bent state along the center crease.

[0120] Invention Effects

[0121] According to the structure described above, in its assembled state, the grip can be maintained in a shape that is easy for the user to hold because the elasticity of the paper at the central fold can be suppressed from causing the ventral side of the grip to open. Furthermore, because the bending of the head support can be suppressed from returning to the back side, the head support can be maintained in a state of moderate bending relative to the grip. Attached Figure Description

[0122] Figure 1 This is a top view of the razor during the manufacturing process of this embodiment, viewed from the front.

[0123] Figure 2 This is a top view of the razor after manufacturing, as shown in this embodiment, from the front.

[0124] Figure 3 yes Figure 1 An enlarged view of the razor's insertion part and the vicinity of the insertion hole.

[0125] Figure 4 This is a perspective view of the razor in its assembled state according to this embodiment.

[0126] Figure 5 This is a top view of the shaver in its assembled state, as seen from the width direction.

[0127] Figure 6 This is a top view of the razor in its assembled state as described in this embodiment, viewed from the front.

[0128] Figure 7 This is a top view of the razor in its assembled state, as seen from the back.

[0129] Figure 8 This is a top view of the razor in its assembled state as described in this embodiment.

[0130] Figure 9 This is a top view of the razor in its assembled state as described in this embodiment, viewed from below.

[0131] Figure 10 This is a top view of the razor head of this embodiment from the front.

[0132] Figure 11 This is a top view of the razor head of this embodiment from the back.

[0133] Figure 12 This is a top view of the razor after manufacturing, showing a variation of the embodiment 1 from the front.

[0134] Figure 13 This is a top view of the razor after manufacturing, showing a variation of the embodiment 2 from the front.

[0135] Figure 14 yes Figure 13 A magnified view of the area near the razor's cutting edge.

[0136] Figure 15 This is an enlarged view of the area near the cut in the modified embodiment 2, showing the small piece bent to the right from the back side.

[0137] Figure 16 This is a top view of the razor after manufacturing, showing a variation of the embodiment 3 from the front.

[0138] Figure 17 This is an enlarged view of the area near the right protrusion of the modified embodiment 3, viewed from the ventral side, showing the right protrusion fitting into the cut.

[0139] Figure 18 This is a top view of the razor of Modified Example 4 of this embodiment, viewed from the front.

[0140] Figure 19 This is a top view of the razor in the modified example 4 of this embodiment with the razor head removed, viewed from the front.

[0141] Figure 20 This is a top view of the shaver in its assembled state, as seen from the front in Modified Example 4 of this embodiment.

[0142] Figure 21 This is a top view of the shaver of Modified Example 4 of this embodiment in its assembled state, viewed from the width direction.

[0143] Figure 22 This is a top view of the shaver of Modified Example 4 of this embodiment in its assembled state, viewed from the back.

[0144] Figure 23 This is a top view of the shaver of Modified Example 4 of this embodiment in its assembled state, viewed from below.

[0145] Figure 24 This is a perspective view of the razor head of Modification 4 of this embodiment.

[0146] Figure 25 This is a top view of the razor of Modified Example 5 of this embodiment, viewed from the front.

[0147] Figure 26 This is a top view of the shaver in its assembled state, as seen from the front in Modified Example 5 of this embodiment.

[0148] Figure 27 This is a top view of the shaver in its assembled state, as seen from the back of Modified Example 5 of this embodiment.

[0149] Figure 28 This is a top view of the razor of Modified Example 6 of this embodiment, viewed from the front.

[0150] Explanation of reference numerals in the attached figures

[0151] 1, 2, 3, 4, 5, 6 Razors

[0152] 11a, 11b Holding parts

[0153] 11c Narrow section

[0154] 11d Wide Section

[0155] 12a, 12b Edges

[0156] 14a, 14b Bends

[0157] 15a, 15b Incision sites

[0158] 16a, 16b

[0159] 17 Vertex

[0160] 18. Long hole section

[0161] 21 Back

[0162] 22a, 22b Abdomen

[0163] 31. Head support

[0164] 32 Rectangular section

[0165] 32a Adhesive surface

[0166] 33 Triangular section

[0167] 35a Right end support

[0168] 35b Left end support

[0169] 40 main body

[0170] 40d lower end

[0171] 41 Center crease

[0172] 42a, 42b connecting creases

[0173] 43a, 43b Reverse turning marks

[0174] 46a, 46b connecting parts

[0175] 51 Insertion section

[0176] 52 Insertion Hole

[0177] 61 Razor Head

[0178] Exceeding portions of 61a and 61b

[0179] 62 Blade Body

[0180] 64 Adhesives

[0181] 65, 65x front housing

[0182] 65h, 65i incision sites

[0183] 66, 66x rear housing

[0184] 71. Incision site

[0185] 81 Right side protrusion

[0186] 82. Incision site

[0187] 100 Head Fixation Unit

[0188] 101 creases

[0189] 102 Rear Cover

[0190] 102a Fold

[0191] Insertion parts 103a and 103b

[0192] Creases in 104a and 104b

[0193] 200 sheets of backing paper. Detailed Implementation

[0194] One feature of the razor of one aspect of the present invention is that it is designed to contribute to the achievement of SDGs by being environmentally friendly and meeting the 3Rs.

[0195] The razor of the present invention will be described in detail with reference to the accompanying drawings. However, the embodiments and examples described below are merely examples of the present invention and are not intended to limit the scope of the invention. Furthermore, the description of specific dimensions or numerical values ​​or ranges is merely an example and is not limited to such values ​​or ranges. Additionally, in the various drawings, there are instances where the same reference numerals are used to denote the same constituent elements, and their descriptions are omitted.

[0196] <1. Implementation Method>

[0197] <(1) Structure of razor 1>

[0198] Figure 1 This is a top view of the razor during the manufacturing process of this embodiment, viewed from the front. Figure 2 This is a top view of the razor after manufacturing, as shown in this embodiment, from the front. Figure 3 yes Figure 1 An enlarged view of the razor's insertion part and the vicinity of the insertion hole. Figure 4 This is a perspective view of the razor in its assembled state according to this embodiment. Figure 5 This is a top view of the shaver in its assembled state, as seen from the width direction. Figure 6 This is a top view of the razor in its assembled state as described in this embodiment, viewed from the front. Figure 7 This is a top view of the razor in its assembled state, as seen from the back. Figure 8 This is a top view of the razor in its assembled state as described in this embodiment. Figure 9 This is a top view of the razor in its assembled state as described in this embodiment, viewed from below. Figure 10 This is a top view of the razor head of this embodiment from the front. Figure 11 This is a top view of the razor head of this embodiment from the back.

[0199] The x-axis, y-axis, and z-axis are shown in the accompanying figures. The axis perpendicular to the surface of the paper on the plane forming the razor is defined as the "z-axis." The axis perpendicular to the z-axis is defined as the "y-axis." Furthermore, the axis perpendicular to both the y-axis and z-axis is defined as the "x-axis." Here, the x-axis, y-axis, and z-axis form a right-handed three-dimensional orthogonal coordinate system. Hereinafter, the direction of the arrow on the z-axis will be called the z-axis + side, and the direction opposite to the arrow will be called the z-axis - side; the same applies to the other axes. Furthermore, the z-axis + side and z-axis - side are also referred to as the "front" and "back" sides, respectively. The x-axis + side and x-axis - side are also referred to as the "right" and "left" sides, respectively. The y-axis + side and y-axis - side are also referred to as the "top" and "bottom" sides, respectively. Additionally, there are cases where the top and bottom sides are primarily inclined towards the z-axis side relative to the y-axis. The y-axis direction is also referred to as the length direction. The x-axis direction is also referred to as the width direction. The z-axis direction is also referred to as the thickness direction.

[0200] like Figures 1 to 11 As shown, the razor 1 of this embodiment is composed of a razor head 61 and a main body 40. The main body 40 is composed of a grip portion 11, bending portions 14a and 14b, and a head support portion 31.

[0201] In this embodiment, the razor 1 is manufactured in a factory by, for example, separately manufacturing the planar body 40 and the razor head 61. By connecting the separately manufactured body 40 and razor head 61, a razor is manufactured as follows: Figure 1 The razor 1 shown. Then, by bending the bent portions 14a and 14b of the main body 40 towards the back, it is manufactured as shown. Figure 2 The finished product of razor 1 shown. That is, as Figure 1 The razor 1 shown is in the state during the manufacturing process, as... Figure 2 The razor 1 shown is in a factory-finished state. It is assembled as follows... Figure 2 The razor 1 shown after manufacturing is completed becomes the main body 40 with a three-dimensional shape, as shown. Figures 4-9 The razor shown is 1.

[0202] <Main Body 40>

[0203] like Figure 1As shown, the main body 40 is integrally formed from paper. The main body 40 is preferably formed from a water-resistant paper material or a paper material with a water-resistant coating. In this embodiment, the main body 40 is formed into a planar shape by cutting paper along its contour. The thickness of the main body 40 is, for example, approximately 1 mm. The main body 40 has a symmetrical shape with a center line CL extending parallel to the xy plane and parallel to the y-axis as a reference. Here, the right end, left end, upper end, and lower end of the planar main body 40 are defined as right end 40a, left end 40b, upper end 40c, and lower end 40d, respectively. In this embodiment, the total width W1 from right end 40a to left end 40b is approximately 57 mm. The total length L1 from upper end 40c to lower end 40d is approximately 89 mm.

[0204] <Creasing>

[0205] In the main body 40, a central crease 41, connecting creases 42a and 42b, and reverse creases 43a and 43 are formed in a manner that facilitates bending during the manufacture and assembly of the razor 1. Creases are, for example, folds or perforations formed on paper. The central crease 41 is formed such that it extends upward from the lower end 40d of the main body 40 along the center line CL. The central crease 41 branches upward from the vertex 17 located on the center line CL into connecting creases 42a and 42b.

[0206] The connecting crease 42b is formed by extending upward and to the left from the vertex 17 to the left end of the main body 40. The connecting crease 42b consists of a curved crease 42bc and a straight crease 42bs. The curved crease 42bc connects to the vertex 17 and curves outward on the right. The straight crease 42bs connects to the curved crease 42bc to the left of the curved crease 42bc and extends in a generally straight line to the left end of the main body 40.

[0207] The connecting crease 42a is formed in a manner symmetrical to the connecting crease 42b, using the center line CL as a reference, and extends upward and to the right from the right end of the main body 40. The connecting crease 42a is composed of a curved crease 42ac and a straight crease 42as. The curved crease 42ac has a shape symmetrical to the curved crease 42bc, using the center line CL as a reference. The straight crease 42as has a shape symmetrical to the straight crease 42bs, using the center line CL as a reference.

[0208] In the planar main body 40, the connecting creases 42a and 42b form the boundary between the grip portion 11 and the head support portion 31. In this embodiment, the lower side of the connecting creases 42a and 42b forms the grip portion 11, and the upper side of the connecting creases 42a and 42b forms the head support portion 31. Hereinafter, in the planar main body 40, the portions along the connecting creases 42a and 42b will be referred to as connecting portions 46a and 46b, respectively. That is, connecting portions 46a and 46b connect the grip portion 11 and the head support portion 31.

[0209] The reverse bend 43a forms the boundary between the gripping portion 11a and the bent portion 14a (described later) in the planar body 40. That is, the reverse bend 43a does not intersect with the central crease 41 and the connecting creases 42a and 42b, and is formed on the right side of the central crease 41, extending upwards close to the central crease 41. The reverse bend 43b forms the boundary between the gripping portion 11b and the bent portion 14b (described later) in the planar body 40. That is, the reverse bend 43b is formed symmetrically with respect to the center line CL, on the left and right sides of the reverse bend 43a. In this embodiment, the left side of the reverse bend 43a becomes the gripping portion 11, and the right side of the reverse bend 43a becomes the bent portion 14a. The right side of the reverse bend 43b becomes the gripping portion 11, and the left side of the reverse bend 43b becomes the bent portion 14b. The reverse bends 43a and 43b are both formed as straight lines.

[0210] <Head Support Part 31>

[0211] The head support portion 31 is composed of a rectangular portion 32 and a triangular portion 33. The rectangular portion 32 has a generally rectangular shape extending along the width direction, i.e., the x-axis direction. The rectangular portion 32 supports at least two ends of the shaver head 61, and is an example of a "two-end support portion" in this invention. The width W4 of the rectangular portion 32 in the x-axis direction is approximately 42 mm. A flat adhesive surface 32a is formed on the z-axis+ side, i.e., the front side, of the rectangular portion 32. Adhesive 64 is applied to the adhesive surface 32a near both ends in the width direction to bond the shaver head 61.

[0212] The triangular portion 33 has a generally triangular shape that tapers downwards, formed between the rectangular portion 32 and the grip portion 11. The lower vertex 17 of the triangular portion 33 is located on the center line CL. The triangular portion 33 is curved to taper towards the vertex 17.

[0213] Furthermore, when the planar main body 40 is viewed from the front, the angle α formed by the direction of extension of a portion of the rectangular portion 32 on one side of the triangular portion 33 adjacent to the vertex 17 and the direction of extension of a portion of the rectangular portion 32 on the other side is 80° or more and 120° or less. Preferably, the angle α is 90° or more and 110° or less. In this embodiment, the angle α formed by the line extending the straight crease 42as towards the vertex 17 and the line extending the straight crease 42bs towards the vertex 17 is approximately 102°.

[0214] <Holding Part 11>

[0215] The grip portion 11 is formed to extend along the y-axis direction and is gripped by a user or the like. The grip portion 11 has a narrow portion 11c that is formed symmetrically with respect to the center line CL and is narrow in the width direction near the vertex 17. In this embodiment, the width W2 of the narrow portion 11c in the x-axis direction is approximately 22 mm.

[0216] Below the narrow portion 11c, the grip portion 11 has a wide portion 11d that extends from the narrow portion 11c toward the lower end portion 40d in the width direction. In this embodiment, the width W3 of the wide portion 11d in the x-axis direction is approximately 36 mm.

[0217] The lower end of the grip portion 11 is curved. In this embodiment, the grip portion 11 is curved in a manner that is symmetrical about the center line CL from the left end of the width portion 11d through the lower end 40d to the right end of the width portion 11d, and protrudes from the lower side.

[0218] The grip portion 11 includes a grip portion 11a located to the right of the central crease 41 and a grip portion 11b located to the left of the central crease 41, which has a shape symmetrical to the grip portion 11a with the center line CL as a reference. Above the vertex 17, the grip portion 11 is formed into a tapering shape that branches along the connecting portions 46a and 46b of the triangular portion 33. Specifically, the grip portion 11b is connected to the left side of the triangular portion 33 of the head support portion 31 via the connecting portion 46b. The grip portion 11b has a shape in which the left edge 12b is close to the connecting crease 42b and extends to the upper left. The upper end of the grip portion 11b is connected to the lower left corner of the rectangular portion 32 of the head support portion 31. Similarly, the grip portion 11a is connected to the right side of the triangular portion 33 of the head support portion 31 via the connecting portion 46a. The grip portion 11a has a shape in which the right edge 12a is close to the connecting crease 42a and extends to the upper right. The upper end of the gripping part 11a is connected to the lower right corner of the rectangular part 32 of the head support part 31.

[0219] <Insertion part 51 and insertion hole part 52>

[0220] The gripping portion 11 comprises an insertion portion 51 and an insertion hole portion 52. The insertion portion 51 is formed on one side relative to the center line CL and is deformable by pressing. The insertion hole portion 52 is formed on the other side relative to the center line CL, at a position opposite to the insertion portion 51 in the assembled state, and is deformable by pressing. In this embodiment, the insertion portion 51 and the insertion hole portion 52 are formed on the gripping portions 11a and 11b, respectively. Alternatively, the insertion portion 51 and the insertion hole portion 52 can be formed on the gripping portions 11b and 11a, respectively. The specific structures of the insertion portion 51 and the insertion hole portion 52 are mainly as follows: Figure 3 As shown in the enlarged image.

[0221] The insertion portion 51 has a shape that is vertically symmetrical about a symmetry line SL parallel to the x-axis, and is composed of a wide portion 51b and a base portion 51c. The base portion 51c is vertically symmetrical about the symmetry line SL and has a rectangle that is longer along the y-axis. The wide portion 51b is vertically symmetrical about the symmetry line SL and is located to the right of the base portion 51c. The upper and lower sides of the wide portion 51b have shapes that protrude triangularly upwards and downwards, respectively.

[0222] In this embodiment, the insertion part 51 is formed by a cut 51a that is symmetrical about the top and bottom with the symmetry line SL as a reference. The cut 51a is formed in the grip part 11a and, when viewed from the front as a planar grip part 11a, includes an upper part 51aa, an upper protrusion 51ab, a right part 51ac, a lower protrusion 51ad, and a lower part 51ae.

[0223] The upper part 51aa forms the upper boundary (edge) of the base 51c and is a cut extending parallel to the x-axis. The lower part 51ae forms the lower boundary (edge) of the base 51c and is a cut symmetrical to the upper part 51aa, with the line of symmetry SL as a reference. The upper protrusion 51ab forms the upper boundary of the width part 51b and is a cut continuous with the right end of the upper part 51aa. The lower protrusion 51ad forms the lower boundary of the width part 51b and is a cut continuous with the right end of the lower part 51ae. The right part 51ac forms the right boundary (edge) of the width part 51b and is a cut extending parallel to the y-axis. The upper and lower ends of the right part 51ac are continuous with the right ends of the upper protrusion 51ab and the lower protrusion 51ad, respectively.

[0224] The insertion hole 52 is formed by a cut 52a that is symmetrical about vertically with reference to the line of symmetry SL. The cut 52a is formed in the gripping part 11b and, when viewed from the front as a planar gripping part 11b, comprises an upper part 52aa, a longitudinal part 52ab, a lower part 52ac, and a transverse part 52ad. The longitudinal part 52ab is a cut that extends parallel to the y-axis in a manner symmetrical about vertically with reference to the line of symmetry SL. The upper part 52aa is a cut that continues to the upper end of the longitudinal part 52ab and extends towards the upper right. The lower part 52ac is a cut that continues to the lower end of the longitudinal part 52ab and extends towards the lower right, symmetrical about vertically with reference to the line of symmetry SL and the upper part 52aa. The transverse part 52ad is a cut that connects to the midpoint of the longitudinal part 52ab and extends towards the left along the line of symmetry SL.

[0225] Here, the area enclosed by the right and left ends of the upper part 52aa and the right and left ends of the lower part 52ac is defined as trapezoidal part 52b. The area above the upper part 52aa is defined as engaging area 52c. The area below the lower part 52ac is defined as engaging area 52d. The area to the left of the longitudinal part 52ab and above the transverse part 52ad is defined as upper rectangular part 52e. The area to the left of the longitudinal part 52ab and below the transverse part 52ad is defined as lower rectangular part 52f.

[0226] When the planar gripping part 11 is viewed from the front, the insertion part 51 and the insertion hole part 52 are located on the lower end 40d side with the center of the gripping part 11 in the y-axis direction as a reference. Specifically, the symmetry line SL of the insertion part 51 and the insertion hole part 52 is located, for example, 19 mm away from the lower end 40d.

[0227] The distance R24 between the upper end of the upper protrusion 51ab and the lower end of the lower protrusion 51ad in the insertion portion 51 is approximately the same as the distance R25 between the upper end of the upper portion 52aa and the lower end of the lower portion 52ac in the insertion hole portion 52. In this embodiment, both distances R24 and R25 are approximately 12 mm.

[0228] The distance R26 between the upper side portion 51aa and the lower side portion 51ae in the insertion portion 51 is approximately the same as the distance R27 between the upper end and the lower end of the longitudinal portion 52ab in the insertion hole portion 52, and is shorter than distances R24 and R25. In this embodiment, both distances R26 and R27 are approximately 9 mm.

[0229] The distance R21 between the center line CL and the right side portion 51ac of the insertion portion 51 is greater than the distance R22 between the center line CL and the longitudinal portion 52ab of the insertion hole portion 52, and smaller than the distance R23 between the center line CL and the left end of the transverse portion 52ad of the insertion hole portion 52. In this embodiment, the distances R21, R22, and R23 are approximately 8.5 mm, approximately 6 mm, and approximately 11 mm, respectively.

[0230] The distance R28 between the center line CL in the insertion portion 51 and the left end of the lower side portion 51ae is shorter than the distance R29 between the center line CL in the insertion hole portion 52 and the right end of the lower side portion 52ac. In this embodiment, the distances R28 and R29 are approximately 3 mm and approximately 5 mm, respectively.

[0231] <Bending parts 14a and 14b>

[0232] like Figure 1 as well as Figure 2 As shown, the bent portion 14b is formed to protrude outward along the left edge 12b of the grip portion 11b. The length of the bent portion 14b in the width direction is smaller than the length of the grip portion 11 in the width direction. When the planar body 40 is viewed from the front, the value obtained by dividing the length of the bent portion 14b along the y-axis direction (hereinafter referred to as the bent portion length L3) by the length of the grip portion 11b along the y-axis direction (hereinafter referred to as the grip portion length L2) is 0.25 or more. In this embodiment, the bent portion length L3 and the grip portion length L2 are approximately 46 mm and approximately 80 mm, respectively. Then, the value obtained by dividing the bent portion length L3 by the grip portion length L2 is approximately 0.58.

[0233] The bent portion 14b is bent toward the center line CL. In this embodiment, the bent portion 14b is bent along the reverse bend 43b such that the bent portion 14b is located on the back side of the grip portion 11b. The bent portion 14a has a shape that is symmetrical about the left and right sides of the bent portion 14b with the center line CL as a reference. The bent portion 14a is the same as the bent portion 14b, and is bent along the reverse bend 43a such that the bent portion 14a is located on the back side of the grip portion 11b.

[0234] Thus, with both bending portions 14a and 14b bent (hereinafter referred to as the "manufacturing completed state"), the razor 1 is shipped from the factory (see reference). Figure 2 When viewed from the front of the completed shaver 1, the outer edge 16b of the bent portion 14b is approximately parallel to the center line CL, and is located to the left of the center line CL at a distance from the grip portion 11 that does not obstruct bending at the center crease 41. The outer edge 16a of the bent portion 14a is symmetrical to the edge 16b with the center line CL as a reference.

[0235] The bent portion 14b has a cutout portion 15b formed in the portion where the insertion portion 51 and the insertion hole portion 52 fit together in the assembled state. The length of the cutout portion 15b along the y-axis (hereinafter referred to as the cutout length L4) divided by the bent portion length L3 yields a value of 0.26 or more (see reference). Figure 1 In this embodiment, the length of the cut portion L4 is approximately 18 mm. Then, the value obtained by dividing the length of the cut portion L4 by the length of the bend portion L3 is approximately 0.39. The bend portion 14a has a cut portion 15a with a shape that is symmetrical about the left and right of the cut portion 15b with the center line CL as a reference.

[0236] When the bending portion 14b is bent, since a slit portion 15b is formed in the bending portion 14b, the bending portion 14b is prevented from coinciding with the insertion hole portion 52 (see reference). Figure 2 Similarly, when bending the bending portion 14a, since a slit portion 15a is formed in the bending portion 14a, the bending portion 14a is prevented from overlapping with the insertion portion 51 (see reference). Figure 2 Therefore, when the gripping part 11 is bent along the center crease 41, the insertion part 51 and the insertion hole part 52 can be physically fitted together without obstruction.

[0237] <Shaver Head 61>

[0238] like Figure 10 as well as Figure 11 As shown, the razor head 61 is entirely made of metal and comprises a frame and a blade body 62. The frame comprises a front housing 65 and a rear housing 66. The front housing 65 and the rear housing 66 are connected to form a box shape, creating an internal space. The blade body 62 is housed within this internal space.

[0239] In this embodiment, the blade body 62 comprises five blades extending along the x-axis and an elastic member (not shown) that springs the five blades toward the z-axis. The blade body 62 is formed, for example, of stainless steel, an alloy of iron and chromium or chromium and nickel. Furthermore, the blade body 62 may be coated. Additionally, the blade body 62 may comprise four or fewer blades, or six or more blades. Furthermore, the blade body 62 may be a structure formed of a metal other than stainless steel.

[0240] The front housing 65 and the rear housing 66 together form a frame for housing the blade body 62. The front housing 65 and the rear housing 66 are formed by, for example, tin plating of iron after surface treatment with tin. Alternatively, the front housing 65 and the rear housing 66 can be formed from other surface-treated metals or from untreated metals. Thus, since the blade body 62, the front housing 65, and the rear housing 66 are formed from metals primarily containing iron, the razor head 61 can be recycled or discarded as "iron".

[0241] The front housing 65 is box-shaped with an opening 65a on the front side and an open back side. The blade body 62 protrudes from the opening 65a. The front housing 65 comprises a main plate 65c, long side plates 65d and 65e, and short side plates 65f and 65g. The main plate 65c has a generally rectangular surface extending substantially parallel to the xy plane, with the x-axis as its major axis. An opening 65a, also generally rectangular, with the x-axis as its major axis, is formed approximately at the center of the surface of the main plate 65c. The long side plates 65d and 65e are plates extending from the upper and lower ends of the main plate 65c toward the back side along the z-axis direction (thickness direction), respectively. Each of the long side plates 65d and 65e has two protrusions 65b projecting from the ends of the back side. That is, four protrusions 65b are formed on the front housing 65. The short side plates 65f and 65g are plates extending from the right and left ends of the main plate 65c toward the back side, respectively.

[0242] The mainboard 65c, long side panels 65d and 65e, and short side panels 65f and 65g are integrally formed into a planar shape. The front housing 65 is formed by bending the long side panels 65d and 65e and the short side panels 65f and 65g relative to the mainboard 65c, so as to surround the back of the mainboard 65c from the top, bottom, left and right, and have a space that can accommodate the rear housing 66.

[0243] Cutouts 65h and 65i are formed on the long side plates 65d and 65e, respectively (see reference). Figure 6 as well as Figure 8 The cutting portions 65h and 65i are formed at the central position of the long side plates 65d and 65e, including the x-axis direction (long axis direction), and have a certain length along the x-axis direction, extending from the rear end towards the front. These cutting portions 65h and 65i have the function of preventing hair cut by the blade body 62 from passing through and remaining in the shaver head 61. In addition, the cutting portions 65h and 65i include a force point where the user can hook their fingers, nails, or clamps when detaching the shaver head 61 from the head support 31. That is, the cutting portions 65h and 65i simultaneously have the function of being easily recyclable based on sorted waste and the function of preventing cut hair from remaining in the shaver head 61, thus enabling clean and comfortable use of the shaver.

[0244] The rear housing 66 comprises a base plate 66d and long side plates 66e and 66f. The base plate 66d extends substantially parallel to the xy plane and is opposite to the main plate 65c of the front housing 65. The base plate 66d has a generally rectangular surface with the x-axis as its major axis. On the back surface of the base plate 66d, rectangular and substantially planar rectangular planar portions 66a and 66b are formed near both ends in the x-axis direction, respectively. Specifically, an opening 66c, which is substantially rectangular with the x-axis as its major axis, is formed approximately at the center of the back surface of the base plate 66d. Rectangular planar portions 66a and 66b coated with adhesive 64 are formed on the right and left sides of the opening 66c, respectively. Here, the area near the lower right corner of the back surface of the base plate 66d is defined as the extended portion 61a. Furthermore, the area near the lower left corner of the back surface of the base plate 66d is defined as the extended portion 61b. Alternatively, a recess may be formed in at least one of the planar portions of the rectangular planar portions 66a and 66b to the extent that it does not obstruct the adhesion between the razor head 61 and the rectangular portion 32.

[0245] The long side plates 66e and 66f are plates that extend from the upper and lower ends of the base plate 66d toward the front along the z-axis (thickness direction), respectively. The base plate 66d and the long side plates 66e and 66f are formed integrally, for example. A space for accommodating the blade body 62 is formed between the long side plates 66e and 66f.

[0246] The rear housing 66 is connected to the front housing 65 in a state where the blade body 62 is housed in the space between the long side plates 66e and 66f. Then, the two protrusions 65b in the long side plate 65d and the two protrusions 65b in the long side plate 65e of the front housing 65 are bent toward the opening 66c of the rear housing 66 of the front housing 65, thereby fixing the rear housing 66 to the front housing 65.

[0247] like Figure 1 as well as Figure 2 As shown, the shaver head 61 protrudes from the rectangular portion 32 toward the grip portion 11 side, and the rectangular flat portions 66a and 66b of the rear housing 66 are bonded to the rectangular portion 32. More specifically, the shaver head 61 has its protruding portion 61a located below the connecting crease 42a, and its protruding portion 61b located below the connecting crease 42b, and the rectangular flat portions 66a and 66b of the rear housing 66 are bonded to the adhesive surface 32a of the rectangular portion 32 by adhesive 64.

[0248] In order to bond the shaver head 61 to the rectangular portion 32 of the head support 31, the area where the adhesive 64 is disposed is designated as the bonding area, and the area outside is designated as the non-bonding area. The bonding area is not located at the center of the shaver head 61 in the y-axis direction, but rather at the end near the upper side. This creates a structure that easily transmits the force of detachment when the user applies force to the cutting portion 65i to detach the shaver head 61 from the head support 31. Furthermore, the non-bonding area is a defined area other than the bonding area, such as a region 0.5 mm to 1 mm from the periphery of the rear housing 66 forming the frame. By providing such a non-bonding area, the periphery of the shaver head 61 can be designed to not bond with the head support 31, making it easy to detach the shaver head from the head support. Alternatively, the non-bonding area can be a region 0.5 mm to 3 mm from the periphery of the rear housing 66.

[0249] Alternatively, the shaver head 61 can be configured such that the user applies force to the cutting portion 65h when detaching it from the head support 31. In this case, the adhesive area can be provided on the side closer to the lower end, rather than on the side closer to the upper end of the shaver head 61. When the shaver head 61 has both cutting portions 65h and 65i, the adhesive area can be provided on the side closer to either the upper or lower end.

[0250] Furthermore, since the bonding area in the rear housing 66 is planar, even a relatively small bonding area can stably bond the shaver head 61 to the head support 31, allowing for an easy-to-separate and comfortable-to-use structure. Moreover, even if the bonding area is partially planar rather than entirely planar, a certain effect can still be achieved.

[0251] Assembly

[0252] like Figure 2 The shaver 1 shown in its completed manufacturing state is assembled by the user bending it along the center crease 41 and connecting creases 42a and 42b, with the front protruding. Specifically, the user, for example, bends the grip portion 11 along the center crease 41 when assembling the shaver 1. The bending of the grip portion 11 can be done, for example, with one hand. As the grip portion 11 bends, the connecting creases 42a and 42b also bend naturally. Since the bending portions 14a and 14b are already bent when the manufacturing is complete, the user can assemble the shaver 1 with one hand.

[0253] like Figures 4-9As shown, in the assembled state, the portion along the center line CL of the grip 11 becomes the back 21, and the edges 12a and 12b of the grip 11 become the abdomens 22a and 22b, respectively. The head support 31, which extends continuously from the back 21, is thus inclined towards the rear side relative to the center line CL. That is, the head support 31 bends towards the abdomens 22a and 22b. The razor head 61 is positioned on the adhesive surface 32a on the back 21 side of the rectangular portion 32.

[0254] like Figure 5 As shown, in the assembled state, when the shaver 1 is viewed from above along the x-axis, the angle β formed by the extension direction of the adhesive surface 32a of the rectangular portion 32 and the extension direction of the center line CL is 35° or more and 55° or less. Preferably, the angle β is 40° or more and 50° or less. In this embodiment, the angle β is approximately 45°.

[0255] like Figure 3 as well as Figure 4 As shown, in the assembled state, the insertion part 51 is inserted into the insertion hole part 52 and fitted, thereby fixing the grip part 11 in a bent state along the center crease 41. In detail, when the user presses the insertion part 51 while the grip part 11 is bent along the center crease 41, the cut 51a of the grip part 11a cracks, and the insertion part 51 deforms in a manner close to the grip part 11b.

[0256] Then, when the user presses the insertion part 51 further, the insertion part 51 presses against the insertion hole part 52 of the grip part 11b, and the cut 52a of the grip part 11b cracks. At this time, the trapezoidal part 52b, the upper rectangular part 52e, and the lower rectangular part 52f of the insertion hole part 52 roll up to form a hole (hereinafter referred to as the "cracked hole"). Since the maximum length of the cracked hole in the y-axis direction is a distance R25, the insertion part 51 is inserted through the cracked hole. Then, when the user releases their hand from the insertion part 51, the trapezoidal part 52b tries to return to its original shape by elasticity and presses against the insertion part 51. Therefore, the upper end and the lower end of the wide part 51b of the insertion part 51 engage with the engaging areas 52c and 52d in the grip part 11b, respectively. As a result, the insertion part 51 is difficult to pull out from the cracked hole, and the grip part 11 is fixed in a bent state along the center crease 41.

[0257] like Figures 4-9 As shown, during use, the grip portion 11 is configured to be held by the user. The head support portion 31 and the grip portion 11 are configured such that when the user brings the shaver head 61 into contact with the skin, the shaver head 61 elastically deforms to apply force to the user's skin. Then, after use, the shaver head 61 can be separated from the head support portion 31. Specifically, the user places their fingers on the extended portions 61a and 61b and peels the shaver head 61 away from the rectangular portion 32, thereby separating the shaver head 61 from the head support portion 31.

[0258] <Packaging>

[0259] Each razor 1 is individually wrapped in paper. Alternatively, two or more razors 1 can be wrapped together in paper. This makes it easy to carry the razors 1 when they are wrapped in paper, such as during business trips or travel. Furthermore, the wrapping paper and the main body 40 can be disposed of as "paper" according to the classification.

[0260] <2. Variations>

[0261] Next, variations 1 to 6 of the embodiments of the present invention will be described. These variations differ from the embodiments in the shape of the main body, etc. In the following description, the differences from the embodiments will be explained, and the common parts with the embodiments will be omitted. In addition, the description of the same or equivalent reference numerals in the figures will not be repeated.

[0262] <(1) Variation Example 1>

[0263] Figure 12 This is a top view of the razor of Embodiment 1 after manufacturing, viewed from the front. The razor 2 of Embodiment 1 is similar to... Figure 1 Compared to the shaver 1 shown, the shaver 2 lacks the bending portions 14a and 14b, and the shape of the grip portion 11 is different. Since the shaver 2 lacks the bending portions 14a and 14b, by connecting the main body 40 and the shaver head 61, it becomes as follows... Figure 12 The finished product is shown. Thus, by eliminating the bending portions 14a and 14b, manufacturing can be simplified through reduction in bending processes, thereby reducing the manufacturing cost of the razor 2. Furthermore, by reducing the amount of paper used, the material cost in manufacturing the razor 2 can be reduced.

[0264] The grip portion 11 of the razor 2 is formed with a gently curved lower side. This design reduces the stimulation to the user's hand when the lower side of the grip portion 11 comes into contact with the user's hand. Therefore, it helps to reduce discomfort experienced by the user while using the razor 2.

[0265] <(2) Variation Example 2>

[0266] Figure 13 This is a top view of the razor after manufacturing, showing a variation of the embodiment 2 from the front. Figure 14 yes Figure 13 A magnified view of the area near the razor's cutting edge. (See image.) Figure 13 as well as Figure 14 As shown, the razor 3 of the modified embodiment 2 is similar to... Figure 1Compared to the shaver 1 shown, the shaver 3 has a different shape, with a cutting section 71 replacing the bending portions 14a and 14b, the insertion portion 51, and the insertion hole portion 52. Since the shaver 3 does not have the bending portions 14a and 14b, by connecting the main body 40 and the shaver head 61, it becomes... Figure 13 The finished product is shown. Thus, by eliminating the bending portions 14a and 14b, manufacturing can be simplified through reduction in bending processes, thereby reducing the manufacturing cost of the razor 3. Furthermore, by reducing the amount of paper used, the material cost in manufacturing the razor 3 can be reduced.

[0267] The grip portion 11 of the razor 3 is formed with a gently curved lower side. This design reduces the stimulation to the user's hand when the lower side of the grip portion 11 comes into contact with the user's hand. Therefore, it helps to reduce discomfort experienced by the user while using the razor 3.

[0268] <Structure of the incision section 71>

[0269] In this embodiment, the cutout 71 is formed so that it is symmetrical about left and right with the center line CL as a reference, and symmetrical about up and down with the symmetry line SL parallel to the x-axis as a reference.

[0270] like Figure 14 As shown, the cut portion 71 is composed of cuts 71a and 71b. Cut 71a is symmetrical about the center line CL and has a shape that protrudes upwards. It is composed of an upper right portion 71aa and an upper left portion 71ab. The upper right portion 71aa is formed in the grip portion 11a and, when viewed from the front of the planar main body 40, is a cut extending downwards to the right from a point on the center line CL. The upper left portion 71ab is formed in the grip portion 11b and is a cut that is symmetrical about the center line CL to the upper right portion 71aa.

[0271] The cut 71b is symmetrical about the center line CL and has a shape that is symmetrical about the cut 71a about the symmetry line SL2. It is composed of a lower right part 71ba and a lower left part 71bb. The lower right part 71ba is formed in the grip part 11a and is a cut that is symmetrical about the upper right part 71aa about the symmetry line SL2. The lower left part 71bb is formed in the grip part 11b and is a cut that is symmetrical about the lower right part 71ba about the center line CL.

[0272] Here, the region below the incision 71a and above the incision 71b is defined as the small piece 71c.

[0273] <After assembly>

[0274] In the assembled state of the razor 3, the cuts 71a and 71b are formed in such a way that they are close to each other and face the abdomen 22a and 22b respectively from the back 21. Figure 15 This is an enlarged view of the area near the cut in Modified Example 2 of the embodiment, viewed from the back side, showing the small piece bent to the right. (See image below.) Figure 15 As shown, for example, with the shaver 3 assembled, the user grasps the small blade portion 71c and bends it to the right. When the small blade portion 71c is bent, the cuts 71a and 71b open, and in the grip portion 11, an upper end portion 71d is formed as the cut end based on the cut 71a, and a lower end portion 71e is formed as the cut end based on the cut 71b. On the other hand, in the small blade portion 71c, an upper end portion 71f is formed as the cut end based on the cut 71a, and a lower end portion 71g is formed as the cut end based on the cut 71b.

[0275] When the user releases the small piece 71c, the small piece 71c remains bent. In this state, even if the gripping part 11, which is bent along the center crease 41, attempts to return to a flat shape due to the elasticity of the paper or external force, physical interference will occur between the upper end 71d of the main body and the upper end 71f of the small piece, and between the lower end 71e of the main body and the lower end 71g of the small piece. As a result, the gripping part 11, which suppresses bending, returns to a flat shape, and the gripping part 11 is fixed in a bent state along the center crease 41.

[0276] Furthermore, in the shaver 3 of this modified example 2, the structure without the bending portions 14a and 14b is described, but the shaver 3 may also have a structure with the bending portions 14a and 14b. In this case, it may also be a structure in which the cutting portions 15a and 15b are not formed in the bending portions 14a and 14b.

[0277] <(3) Variation Example 3>

[0278] Figure 16 This is a top view of the razor after manufacturing, showing a variation of embodiment 3 from the front. (See attached image.) Figure 16 As shown, the razor 4 in the modified embodiment 3 is similar to... Figure 1 Compared to the shaver 1 shown, the shaver 4 has a right-side protrusion 81, an upper-left protrusion 82a, and a lower-left protrusion 82b, replacing the bending portions 14a and 14b, the insertion portion 51, and the insertion hole portion 52, resulting in a different shape for the grip portion 11. Since the shaver 4 lacks the bending portions 14a and 14b, by connecting the main body 40 and the shaver head 61, it becomes... Figure 16The finished product is shown. Thus, by eliminating the bending portions 14a and 14b, manufacturing can be simplified through reduction in bending processes, thereby reducing the manufacturing cost of the razor 4. Furthermore, by reducing the amount of paper used, the material cost in manufacturing the razor 4 can be reduced.

[0279] The grip portion 11 of the razor 4 is formed with a gently curved lower side. This design reduces the stimulation to the user's hand when the lower side of the grip portion 11 comes into contact with the user's hand. Therefore, it helps to reduce discomfort experienced by the user while using the razor 4.

[0280] <Structure of the right protrusion 81>

[0281] The right protrusion 81 is formed to protrude outward from the edge 12a of the grip portion 11. In this embodiment, the right protrusion 81 extends substantially parallel to the xy plane and is integrally formed with the main body 40. Specifically, the right protrusion 81 has a shape that forms an upper protrusion 81a and a lower protrusion 81b when the main body 40 is planar when viewed from the front, and extends from the edge 12a toward the right.

[0282] The upper protrusion 81a is located above the right protrusion 81 and has an upward-protruding shape. The lower protrusion 81b is located below the right protrusion 81 and has a downward-protruding shape. An upper recess 81c with a downward-concave shape is formed between the upper protrusion 81a and the grip portion 11a. A lower recess 81d with an upward-concave shape is formed between the lower protrusion 81b and the grip portion 11a. A recess crease 81e is formed along the edge 12a between the upper recess 81c and the lower recess 81d.

[0283] <Structure of the upper left protrusion 82a and the lower left protrusion 82b>

[0284] The upper left protrusion 82a and the lower left protrusion 82b extend approximately parallel to the xy plane and are integrally formed with the main body 40. A cutout 82 is formed between the upper left protrusion 82a and the lower left protrusion 82b.

[0285] Specifically, the upper left protrusion 82a has a shape that forms an upper convex portion 82c when viewed from the front as a planar main body 40, and extends from the edge portion 12b toward the left. The upper convex portion 82c is located below the upper left protrusion 82a and has a shape that protrudes downward. An upper recess 82e with an upward-facing concave shape is formed between the upper convex portion 82c and the grip portion 11b.

[0286] The lower left protrusion 82b has a shape that forms a lower convex portion 82d when viewed from the front of the planar main body 40, and extends from the edge portion 12b toward the left. The lower convex portion 82d is located above the lower left protrusion 82b and has a shape that protrudes upward. A lower recess 82f with a shape that is recessed downward is formed between the lower convex portion 82d and the grip portion 11b.

[0287] Here, the length between the upper end of the upper protrusion 81a and the lower end of the lower protrusion 81b in the right protrusion 81 is defined as the protrusion length L41. The length between the lower end of the upper recess 81c and the upper end of the lower recess 81d is defined as the recess length L42.

[0288] The length between the lower end of the upper convex portion 82c and the upper end of the lower convex portion 82d in the cut portion 82 (hereinafter referred to as the inter-convex portion length L43) is slightly larger than the inter-concave portion length L42 and smaller than the inter-convex portion length L41. The length between the upper end of the upper concave portion 82e and the lower end of the lower concave portion 82f (hereinafter referred to as the inter-concave portion length L44) is larger than the inter-convex portion length L43 and smaller than the inter-convex portion length L41.

[0289] <After assembly>

[0290] In the assembled state, the right protrusion 81 is inserted into the cutout 82 and fitted together, thereby fixing the gripping part 11 in a bent state along the center crease 41. Figure 17 This is an enlarged view of the area near the right protrusion 81 in the modified embodiment 3, viewed from the ventral side, showing the right protrusion fitting into the cut. (See image below.) Figure 16 as well as Figure 17 As shown, for example, with the shaver 4 assembled, the user bends the right protrusion 81 along the crease 81e between the recesses toward the x-axis. With the right protrusion 81 bent, the upper recess 81c and the lower recess 81d of the right protrusion 81 are positioned between the upper left protrusion 82a and the lower left protrusion 82b of the cutout portion 82 (more specifically, in...). Figure 17 (Between the upper recess 82e and the lower recess 82f, not shown in the figure).

[0291] When the user releases their grip from the right protrusion 81, the right protrusion 81 remains bent. In this state, even if the grip portion 11, bent along the center crease 41, attempts to return to a flat shape due to the elasticity of the paper or external force, physical interference occurs between the upper protrusion 81a and the grip portion 11b of the right protrusion 81, and between the lower protrusion 81b and the grip portion 11b of the right protrusion 81. As a result, the grip portion 11, which has been prevented from bending, returns to a flat shape, and is fixed in a bent state along the center crease 41.

[0292] Thus, since the right protrusion 81 can be fitted with the cutout 82 by a simple bending operation, compared with the structure of Embodiment 1, Modification 1 and Modification 2, the gripping part 11 can be easily fixed in a state where it is bent along the center crease 41.

[0293] Furthermore, in the shaver 4 of the modified embodiment 3, a structure without bending portions 14a and 14b has been described, but the shaver 4 may also have a structure with bending portions 14a and 14b. In this case, it is also possible that the cutting portions 15a and 15b are not formed in the bending portions 14a and 14b.

[0294] Furthermore, in the shaver 4 of the modified embodiment 3, the structure of the right protrusion 81 protruding outward from the edge 12a and the cutting portion 82 being formed on the edge 12b is described, but it is also possible for the right protrusion 81 to protrude outward from the edge 12b and the cutting portion 82 to be formed on the edge 12a.

[0295] <(4) Variation Example 4>

[0296] Figure 18 This is a top view of the razor of Modified Example 4 of this embodiment, viewed from the front. Figure 19 This is a top view of the razor in the modified example 4 of this embodiment with the razor head removed, viewed from the front. Figure 20 This is a top view of the shaver in its assembled state, as seen from the front in Modified Example 4 of this embodiment. Figure 21 This is a top view of the shaver of Modified Example 4 of this embodiment in its assembled state, viewed from the width direction. Figure 22 This is a top view of the shaver of Modified Example 4 of this embodiment in its assembled state, viewed from the back. Figure 23 This is a top view of the shaver of Modified Example 4 of this embodiment in its assembled state, viewed from below. Figure 24 This is a perspective view of the razor head of Modification 4 of this embodiment.

[0297] like Figures 18-24 As shown, in the assembled state, the razor 5 of this embodiment has a barrel formed by a grip and a bending part, and the cross-section of the barrel is approximately triangular when viewed from the y-axis direction, which is different from that of the razor 1. Furthermore, the structure of the razor head 61 is different from that of the razor 1.

[0298] The main body 40 of the shaver 5 also includes a head fixing part 100. The head fixing part 100 includes a rear cover part 102 and insertion parts 103a and 103b. The head fixing part 100 is located on the side opposite to the grip part 11 relative to the head support part 31.

[0299] In detail, the back cover portion 102 of the head fixing portion 100 is connected to the upper side of the head support portion 31 and has a shape that is symmetrical about the center line CL. When viewed from the front, the back cover portion 102 slightly narrows in width and extends downward to the pleated portion 102c, then significantly widens in width and extends downward to connect with the upper side of the head support portion 31. That is, the back cover portion 102 has a slightly pleated shape in the pleated portion 102c. A crease 101 extending in width is formed at the boundary between the back cover portion 102 and the head support portion 31.

[0300] When the head fixing portion 100 is bent at the crease 101, the insertion portions 103a and 103b engage with the grip portion 11 and the bending portions 14a and 14b. Specifically, the insertion portion 103a has a shape that protrudes to the right from the right edge of the back cover portion 102 above the pleated portion 102a of the back cover portion 102. The insertion portion 103a is continuous with the back cover portion 102, forming a crease 104a at these boundaries.

[0301] The insertion portion 103b has a shape symmetrical to the insertion portion 103a with the center line CL as a reference, and protrudes to the left from the left edge of the rear cover portion 102 above the pleated portion 102a of the rear cover portion 102. The insertion portion 103b is continuous with the rear cover portion 102, and a crease 104b is formed at its boundary.

[0302] In the gripping part 11, in the state before assembly, an elongated hole 18 with a shape symmetrical about left and right with the center line CL as a reference and with a longer shape in the length direction is formed on the lower side of the vertex 17.

[0303] The gripping portion 11a includes a portion of the edge portion 12a that protrudes to the right in a direction away from the center line CL, i.e., a protrusion 12aa. The protrusion 12aa is located between the upper reverse fold 43aa and the lower reverse fold 43ab. The length of the protrusion 12aa in the longitudinal direction is greater than the length of the left end of the insertion portion 103a in the longitudinal direction, i.e., the length of the fold 104a in the longitudinal direction. Furthermore, the distance between the protrusion 12aa and the fold 101 is approximately the same as the distance between the fold 104a and the fold 101.

[0304] The upper, right, and lower edges of the protrusion 12aa form cutouts 43ac. When bending the gripping portion 11a and the bent portion 14a along the reverse bends 43aa and 43ab, the protrusion 12aa is not bent due to the cutouts 43ac. On the other hand, in the bent portion 14a, a recess 14aa is formed between the reverse bends 43aa and 43ab. Then, between the recess 14aa and the gripping portion 11a, an elongated hole 43ad with a shape that is longer in the length direction is formed (see reference). Figure 22 as well as Figure 23 ).

[0305] The grip portion 11b includes a protrusion 12ba with a shape symmetrical to the protrusion 12aa, using the center line CL as a reference. That is, the protrusion 12ba protrudes to the left in the direction away from the center line CL. The protrusion 12ba is located between the upper anti-turning groove 43ba and the lower anti-turning groove 43bb.

[0306] The upper, left, and lower edges of the protrusion 12ba form cutouts 43bc. When bending the gripping portion 11b and the bent portion 14b along the reverse bends 43ba and 43bb, the protrusion 12ba is not bent due to the cutouts 43bc. On the other hand, in the bent portion 14b, a recess 14ba is formed between the reverse bends 43ba and 43bb. Then, between the recess 14ba and the gripping portion 11b, an elongated hole 43bd with a shape that is longer in the length direction is formed (see reference). Figure 22 as well as Figure 23 ).

[0307] A relief portion 16aa is formed at the edge 16a of the bent portion 14a, recessed towards the centerline CL. The length of the relief portion 16aa in the longitudinal direction is greater than the length of the protrusion 12ba in the longitudinal direction. The length of the relief portion 16aa in the width direction is greater than the length of the protrusion 12ba in the width direction.

[0308] After the avoidance portion 16aa bends the grip portion 11a and the grip portion 11b along the center crease 41, and further bends the grip portion 11a and the bend portion 14a along the reverse creases 43aa and 43ab, it is formed in a position that can be opposite to the protrusion 12ba.

[0309] A clearance portion 16ba is formed on the edge 16b of the bending portion 14b, having a shape symmetrical with the clearance portion 16aa based on the center line CL.

[0310] After the gripping portion 11a and gripping portion 11b are bent along the center crease 41, the avoidance portion 16ba is further bent along the reverse creases 43ba and 43bb, and is positioned so as to be opposite to the protrusion 12aa.

[0311] The head support portion 31 is composed of a triangular portion 33, a right end support portion 35a, and a left end support portion 35b (mainly referring to...). Figure 18 as well as Figure 19 The right end support 35a and the left end support 35b are examples of the "two-end support" in this invention that support at least both ends of the razor head 61.

[0312] The triangular portion 33 is located above the connecting creases 42a and 42b. The right-end support portion 35a is continuous with a portion of the upper right side of the triangular portion 33 and is positioned such that it clamps the upper side of the grip portion 11a. The left-end support portion 35b is continuous with a portion of the upper left side of the triangular portion 33 and is positioned such that it clamps the upper side of the grip portion 11b. The razor head 61 is bonded to the right-end support portion 35a, the left-end support portion 35b, and the triangular portion 33, thereby fixing it to the head support portion 31. More specifically, as... Figure 18 As shown, adhesives 64a, 64b, and 64c are applied at these locations to bond the shaver head 61 to the head support portion 31. Between the shaver head 61 and the head support portion 31, the area where these adhesives 64a, 64b, and 64c are applied is designated as the bonding area, and the remaining area is designated as the non-bonding area. That is, as... Figure 24 As shown, adhesive regions 66m, 66n, and 66o are provided in the rear housing 66x of the frame forming the shaver head 61. These adhesive regions 66m, 66n, and 66o are not located at the center of the shaver head 61 in the y-axis direction, but rather at the upper end. This creates a structure that easily transmits the force required to detach the shaver head 61 from the head support 31 when the user applies force to the cutting portion 65i. Furthermore, a non-adhesive region is defined as a region other than the adhesive regions 66m, 66n, and 66o, located at a distance of, for example, 0.5 mm to 1 mm from the periphery of the rear housing 66x forming the frame. By providing such a non-adhesive region, it is possible to ensure that the periphery of the shaver head 61 is not adhered to the head support 31, allowing the shaver head to easily detach from the head support. Furthermore, in this modified example, the shaver head 61 is fixed to the head support 31 such that a portion of the grip 11 side does not protrude from the head support 31 toward the grip 11 side. The non-adhesive area may also be set as an area 0.5 mm to 3 mm away from the periphery of the rear housing 66x.

[0313] The boundary between the gripping part 11a and the right end support part 35a is formed by an L-shaped cut 34a. The cut 34a extends from the upper end of the connecting crease 42a at position 34aa towards the lower right and then extends towards the lower left to position 34ab.

[0314] The boundary between the gripping part 11b and the left end support part 35b is a cut 34b with a shape symmetrical to the cut 34a, taking the center line CL as a reference. After extending from the upper end of the connecting crease 42b at position 34ba toward the lower left, the cut 34b extends toward the lower right to position 34bb.

[0315] like Figure 24As shown, the razor head 61 is similar to the razor head 61 of the embodiment, but the structure is different in the following main aspects.

[0316] like Figure 24 As shown, the razor head 61 includes a frame formed by a front housing 65x and a rear housing 66x. The blade 62, similar to the embodiment, is housed within the frame and protrudes through an opening 65a in the front housing 65x. The front housing 65 comprises a main plate 65c, long side plates 65j and 65k, and short side plates 65l and 65m. The long side plates 65j and 65k extend from the upper and lower ends of the main plate 65c toward the rear surface along the z-axis (thickness direction), respectively. Each of the long side plates 65j and 65k has two protrusions 65b extending from the ends of the rear surface. The short side plates 65l and 65m extend from the left and right ends of the main plate 65c toward the rear surface, respectively.

[0317] On the long side plates 65j and 65k, cutouts 65h and 65i are formed respectively, as in the embodiment (see reference). Figure 20 , Figures 24-26 The cutting portions 65h and 65i have a certain length along the x-axis direction at the central position of the long side plates 65j and 65k, including the long axis direction, and are respectively formed from the back to the front. The head support portion 31 does not have at least one part located opposite to the cutting portions 65h and 65i. Therefore, it has a structure that allows easy contact with the cutting portions 65h or 65i when the user detaches the shaver head from the head support portion. These cutting portions 65h and 65i have the function of preventing hair cut by the blade body 62 from passing through and remaining inside the shaver head 61. Furthermore, the cutting portions 65h and 65i have a force point portion that hooks onto fingers, nails, or clamps when the shaver head 61 is detached from the head support portion 31. That is, the cutting portions 65h and 65i simultaneously have the function of easy recycling using separated waste and the function of preventing cut hair from remaining inside the shaver head 61, thus enabling clean and comfortable use of the shaver.

[0318] Cutouts 65n and 65o are formed on the short side plates 65l and 65m, respectively (see reference). Figure 24 as well as Figure 21 The cutting portions 65n and 65o are formed at the central position of the short side plates 65l and 65m, including the y-axis direction (long axis direction), have a certain length along the y-axis direction, and face from the back to the front. These cutting portions 65n and 65o, like the cutting portions 65h and 65i of the long side plates 65j and 65k, have the function of allowing cut hair to pass through and serving as a force point when the razor head 61 is disengaged from the head support portion 31.

[0319] The rear housing 66x is composed of a base plate 66y, long side plates 66g and 66h, and short side plates 66i and 66j. The base plate 66y has the same shape as the base plate 66d in the embodiment, but instead of the opening 66c in the embodiment, it has two openings 66k and 66l. Figure 23 As shown, openings 66k and 66l are located on the back side opposite to the head support 31, and in areas where the head support 31 is not located. Therefore, openings 66k and 66l are not blocked by the head support 31, and cut hair easily passes through them. This prevents cut hair from remaining inside the razor head 61, allowing for clean and comfortable use of the razor 5.

[0320] The lower long side plate 66h of the rear housing 66x and the lower long side plate 65k of the front housing 65x have a distance of 0.5mm to 1mm. This creates a structure that allows the shaver head 61 to easily contact the cutting portion 65i when the user detaches it from the head support 31. Furthermore, the upper long side plate 66g of the rear housing 66x and the upper long side plate 65j of the front housing 65x can also have a distance of 0.5mm to 1mm. When configured in this way, it also allows the shaver head 61 to easily contact the cutting portion 65h when the user detaches it from the head support 31. Additionally, the distances between the long side plates 66h and 66g of the rear housing 66x and the long side plates 65k and 65j of the front housing 65x can each be set to 0.5mm to 3mm.

[0321] Furthermore, either the cutting portion 65h or 65i can be formed. Even with such a structure, it is easy for cut hair to pass through and for the razor head 61 to detach from the head support portion 31. In this case, the structure with the cutting portion 65i is particularly preferred due to its high user convenience. However, for more efficient passage of cut hair, it is preferable to provide both the cutting portions 65h and 65i. Furthermore, when only one of the cutting portions 65h and 65i is formed, the distance between the long side plates 66h and 66g of the rear housing 66x and the long side plates 65k and 65j of the front housing 65x is preferably set at the portion where the cutting portion 65h or 65i is formed.

[0322] Furthermore, similar to the embodiment, the structure can be configured such that the user applies force to the cutting portion 65h when the shaver head 61 is detached from the head support portion 31. In this case, the adhesive area may be provided not on the upper end side of the shaver head 61, but on the lower end side. When the shaver head 61 has both cutting portions 65h and 65i, the adhesive area may be provided on either the upper or lower end side.

[0323] Assembly

[0324] An example of the assembly method for the shaver 5 will be described. When assembling the shaver 5, the user bends the grip portion 11a and the bending portion 14a along the reverse bend lines 43aa and 43ab, and the grip portion 11b and the bending portion 14b along the reverse bend lines 43ba and 43bb (first bending step), with the grip portion 11b and the bending portion 14b bending along the reverse bend lines 43ba and 43bb. In the first bending step, as described above, elongated holes 43ad and 43bd are formed.

[0325] Next, the user bends the grips 11a and 11b along the center crease 41 and connecting creases 42a and 42b in a convex manner (second bending step).

[0326] In the second bending step, because of the cuts 34a and 34b, the gripping portion 11a is bent away from the back side formed by the right end support portion 35a, the triangular portion 33, and the left end support portion 35b. The gripping portion 11b is also bent away from the back side in the same way as the gripping portion 11a.

[0327] In addition, Figure 22 as well as Figure 23 In this configuration, the bend 14b is located on the back side of the bend 14a, or the bend 14a may be located on the back side of the bend 14b. Furthermore, since a clearance portion 16ba is formed on the bend 14b, the elongated hole 43ad will not be blocked by the bend 14b. Similarly, since a clearance portion 16aa is formed on the bend 14a, the elongated hole 43bd will not be blocked by the bend 14a.

[0328] Next, by the user, the insertion part 103a is bent toward the back along the crease 104a and the insertion part 103b is bent toward the back along the crease 104b (third bending step).

[0329] Next, the user bends the back cover 102 along the back of the crease 101. Then, the insertion parts 103a and 103b are inserted into the elongated holes 43ad and 43bd formed in the first bending step, respectively, and the head fixing part 100 engages with the grip part 11 (fourth bending step).

[0330] The distance between the elongated holes 43ad and 43bd is fixed by the insertion portions 103a and 103b, thus preventing the grip portions 11a and 11b from expanding and returning them to a flat surface. Furthermore, the bending portions 14a and 14b are pressed down by the rear cover portion 102, thus preventing the bending portions 14a and 11a from expanding and returning them to a flat surface, and preventing the bending portions 14b and 11b from expanding and returning them to a flat surface.

[0331] The gripping portions 11a and 11b and the bending portions 14a and 14b, in a fixed state, form a cylinder 23 extending along the y-axis. The cross-section of the cylinder 23, viewed from the y-axis, is approximately triangular (see reference). Figure 23 ).

[0332] Furthermore, the structure of the razor 5 completed by the first bending step to the fourth bending step will be described, but by performing only the second bending step described above, the razor 5 can be used in the manner of the razors 1 to 4.

[0333] Furthermore, the cross-section of the tube 23 is not limited to a triangle; it can also be a square, a pentagon, or other polygon with four or more sides.

[0334] Furthermore, while the elongated hole 18 is described as having a shape symmetrical along the center line CL, the shape of the elongated hole 18 can also be an asymmetrical structure along the center line CL. Preferably, the elongated hole 18 has a structure that intersects the center line CL when viewed from above.

[0335] Furthermore, the structure in which the insertion portions 103a and 103b fit into the grip portions 11a and 11b and the bending portions 14a and 14b will be described, but it is also possible for the insertion portions 103a and 103b to fit into the head support portion 31.

[0336] <(5) Variation Example 5>

[0337] Figure 25 This is a top view of the razor of Modified Example 5 of this embodiment, viewed from the front. Figure 26 This is a top view of the shaver in its assembled state, as seen from the front in Modified Example 5 of this embodiment. Figure 27 This is a top view of the shaver in its assembled state, as seen from the back of Modified Example 5 of this embodiment.

[0338] like Figures 25-27 As shown, the method of fixing the grip portion 11 of the shaver 6 in the assembled state in Modification 5 of this embodiment is different from the method of fixing the grip portion 11 of the shaver 5 in Modification 4.

[0339] In the right edge 12a of the grip portion 11a, a cut 12ab is formed between the upper anti-turning crease 43aa and the lower anti-turning crease 43ab. The cut is formed in the width direction at both the upper and lower ends of the cut 12ab. In the left edge 12b of the grip portion 11b, a cut 12bb is formed with a shape symmetrical to the cut 12ab, using the center line CL as a reference.

[0340] The bent portion 14a includes a protrusion 16ab that protrudes from the edge 16a in a direction away from the center line CL, i.e., to the right. The protrusion 16ab is formed in a position opposite to the cutout 12bb after the gripping portions 11a and 11b are bent along the center crease 41, and then further bent along the reverse creases 43aa and 43ab. The length of the protrusion 16ab in the longitudinal direction is shorter than the length of the cutout 12bb in the longitudinal direction.

[0341] The bent portion 14b includes a protrusion 16bb that protrudes to the left from the center line CL, i.e., from the edge 16b. The protrusion 16bb is formed in a position opposite to the cutout 12ab after the gripping portions 11a and 11b are bent along the center crease 41, and then further bent along the reverse creases 43ba and 43bb. The length of the protrusion 16bb in the longitudinal direction is shorter than the length of the cutout 12ab. The length of the protrusion 16bb in the width direction is, for example, shorter than the length of the protrusion 16ab in the width direction.

[0342] The head support portion 31 is composed of a triangular portion 33, a right end support portion 35a, and a left end support portion 35b (see reference). Figure 27 The razor head 61 is fixed to the head support 31 by adhesive to the right end support 35a and the left end support 35b. In addition, in this modified example, the razor head 61 is fixed to the head support 31 in such a way that a portion of the grip 11 side does not protrude from the head support 31 toward the grip 11 side.

[0343] The boundary between the gripping part 11a and the right end support part 35a is a roughly straight cut 34a (see reference). Figure 25 The cut 34a starts from position 34aa at the upper end of the connecting crease 42a (see reference). Figure 27 It extends toward the lower right to position 34ab.

[0344] The boundary between the grip portion 11b and the left end support portion 35b is a cutout 34b with a shape symmetrical to the cutout 34a, using the center line CL as a reference (see reference). Figure 25 The cut 34b extends from position 34ba at the upper end of the connecting crease 42b toward the lower left to position 34bb.

[0345] Assembly

[0346] An example of the assembly method for razor 6 will be explained. Regarding the assembly of razor 6, the differences from the assembly of razor 5 in modified example 4 will be explained in detail, and the similarities with the assembly of razor 6 will be briefly explained.

[0347] First, the user performs the first bending step. Next, the user bends the grip portions 11a and 11b along the center crease 41 and connecting creases 42a and 42b with the front facing outwards. At this time, the grip portions 11a and 11b are bent so that the bent portion 14a is located on the back of the bent portion 14b, and the protrusion 16bb of the bent portion 14b is inserted into the cut 12ab (second bending step).

[0348] Next, the user bends the protrusion 16ab along the crease 16ac. At this time, the protrusion 16ab is bent in the direction close to the cut 12bb (third bending step).

[0349] Next, through the user, the protrusion 16ab is inserted into the cut 12bb and the protrusion 16ab is engaged with the gripping part 11b (fourth bending step).

[0350] By inserting the protrusion 16ab into the cut 12bb, the expansion of the gripping portions 11a and 11b is suppressed, and the expansion of the bent portion 14a and 11a is restored to a flat surface. Furthermore, by pressing the bent portion 14b with the bent portion 14a, the expansion of the bent portion 14b and the gripping portion 11b is suppressed, and the bent portion 14b is restored to a flat surface.

[0351] The gripping portions 11a and 11b and the bending portions 14a and 14b, in a fixed state, form a cylinder 23 extending along the y-axis. Although the cross-section of the cylinder 23 is not shown, it is approximately triangular when viewed from the y-axis direction.

[0352] Furthermore, the structure of the razor 6 completed by the first to fourth bending steps will be explained, but by performing only the second bending step, the razor 6 can be used in the manner of the razors 1 to 4.

[0353] <(6) Variation Example 6>

[0354] Figure 28 This is a top view of the razor of Modified Example 6 of this embodiment, viewed from the front. (As shown...) Figure 28 As shown, the razor 5 is embedded in the backing paper 200. The outer periphery of the razor 5 is perforated, for example, so that the razor 5 can be removed from the backing paper 200 for use.

[0355] Thus, by embedding the razor 5 into the liner 200, the razor 6 can be easily carried and transported because the liner 200 can be easily folded into a bag shape to package it. Furthermore, since the liner 200 can be shaped in any way, the razor 5 can be easily displayed on a shelf or easily carried.

[0356] Furthermore, in this modified example, the structure of the razor 5 embedded in the liner 200 is described, but the structure of the razor 1 to 4 or 6 embedded in the liner 200 may also be described.

[0357] <2. Features of the Invention>

[0358] The present invention, as illustrated and described above, has the following features.

[0359] The razor 1, which has a narrow portion 11c in the grip section 11 of the above-described structure, and extends in the width direction from the narrow portion 11c toward the lower end portion 40d opposite to the head support section 31, can reduce paper usage because the corners are rounded instead of making the flat shape of the razor 1 rectangular. Furthermore, by not making the razor 1 rectangular, design freedom is increased, and the main body becomes more compact. Moreover, the razor 1 is designed such that when the user uses the razor 1, the user's index finger and thumb are located near the narrow portion 11c, but the narrow portion 11c prevents the user's fingers from slipping off from below.

[0360] Furthermore, the structure described above, with a central crease 41 formed along the center line CL from the apex 17 to the lower end 40d, and connecting creases 42a and 42b formed along the connecting portions 46a and 46b, allows the user to bend along the connecting creases 42a and 42b and the central crease 41 during assembly. When bending the grip portion 11 along the central crease 41, the connecting creases 42a and 42b connected to the central crease 41 can also be bent effortlessly. Similarly, during assembly, when bending the grip portion 11 along the connecting creases 42a and 42b, the central crease 41 connected to the connecting creases 42a and 42b can also be bent effortlessly. That is, for example, the user can assemble the shaver 1 with one click, reducing the time required to assemble the shaver 1 and making it easy to assemble. Thus, a structure can be made that eliminates the need for complex operations before the user can use the shaver 1. Furthermore, when the connecting creases 42a and 42b are bent, the head support 31 can be smoothly bent toward the abdomen 22a and 22b.

[0361] Furthermore, in the razor 1 with the lower end 40d of the structure described above, which is curved on the side opposite to the head support 31, the area around the lower end 40d can be rounded instead of forming a straight line after assembly. Therefore, for example, even if the user's fingers come into contact with the area around the lower end 40d, the user can experience less discomfort due to the way the razor 1 is held. In other words, a razor that prevents user discomfort can be provided.

[0362] Furthermore, the razor head 61 of the above structure has rectangular and substantially planar rectangular planar portions 66a and 66b near both ends in the width direction. By bonding these two rectangular planar portions 66a and 66b to the adhesive surface 32a of the rectangular portion 32, the razor head 61 and the rectangular portion 32 can be bonded with a moderate strength that takes into account easy peeling. Therefore, since the main body 40 and the razor head 61 can be easily separated without damaging the razor head 61, a razor 1 that prevents the blade body 62 of the razor 1 from being exposed during separation, thus ensuring safety, can be provided.

[0363] Furthermore, by bending the head support 31 continuously from the back 21 toward the abdomen 22a and 22b in the assembled state of the above-described structure, with the shaver head 61 positioned on the adhesive surface 32a on the back 21 side of the rectangular portion 32, the shaver head 61 can be made approximately parallel to the adhesive surface 32a. Therefore, when the user operates the grip 11, the blades of the shaver head 61 can be pressed against the skin at an angle that contacts the skin surface. Moreover, unlike existing structures where the external force is received in a direction approximately orthogonal to the surface on the back 21 side of the rectangular portion 32 when an external force is applied to the blades, the external force can be received along the adhesive surface 32a. Therefore, it is possible to prevent the shaver head 61 from detaching from the head support 31 or a portion of the main body 40 from being damaged by external force.

[0364] Furthermore, in the aforementioned structure, the bent portions 14a and 14b are formed such that they protrude outward along the edges 12a and 12b of the grip portion 11, respectively, and can be bent towards the centerline CL. They also have a width smaller than the grip portion 11. The abdomens 22a and 22b of the grip portion 11 are rounded, making the grip portion 11 easy for the user to hold. Moreover, since no sharp parts are formed on the abdomens 22a and 22b where the user's fingers are likely to come into contact, a razor that prioritizes safety can be provided.

[0365] Furthermore, in the shaver 5 described above, since the head fixing part 100 is located on the side opposite to the grip part 11 of the head support part 31, and is bent to fit into the head fixing part 100 or the head support part 31, the rigidity of the grip part 11 or the head support part 31 can be improved by fitting into the head fixing part 100. Therefore, since the position of the shaver head 61 can be fixed, even though the shaver 5 is made of paper, it can be used with the same high-rigidity feel as other shavers whose grip part 11 or the head support part 31 is made of resin or metal.

[0366] Furthermore, in the aforementioned shavers 5 and 6, since the grip portion 11 is assembled with a fixed polygonal cross-section in the plane intersecting the length direction, shape changes of the grip portion 11 when held can be suppressed, thus fixing the shape of the grip portion 11. Therefore, the grip portion 11 can be easily gripped, and although shavers 5 and 6 are made of paper, they can be used with the same high-rigidity feel as other shavers whose grip portion 11 or head support portion 31 is made of resin or metal.

[0367] Furthermore, in the shaver 5 described above, before assembly, the grip portion 11 has an elongated hole 18 extending along its length. When the user's fingertip acts on the elongated hole, friction occurs between the edge of the elongated hole and the user's finger, creating a space for the user to rest their fingers. This prevents slippage and makes it easier to grip the shaver.

[0368] Furthermore, in the shaver 1 described above, since the protruding portions 61a and 61b of the shaver head 61 protrude from the rectangular portion 32 of the head support portion 31 toward the grip portion 11, the shaver head 61 can be separated from the head support portion 31 after use. Therefore, when the connecting creases 42a and 42b are bent during assembly, the tapered portion of the grip portion 11, which branches along the connecting creases 42a and 42b, can separate from the protruding portions 61a and 61b, exposing the protruding portions 61a and 61b. Thus, a portion for placing the user's fingers can be formed on the shaver head 61, allowing the user to place their fingers on the protruding portions 61a and 61b to safely separate the shaver 1 from the shaver head 61. Then, by setting the shaver head 61 to be entirely made of metal, and the grip 11 and head support 31 to be integrally formed of paper, the used shaver can be separated into metal and paper materials simply by separating the shaver head 61 from the shaver 1. This allows for easy separation according to different materials and enables simple and economical recycling. In other words, a shaver can be provided that effectively recycles used shavers while considering the safety of the user when recycling the main body 40 and shaver head 61 to be separated.

[0369] Furthermore, by bonding the extended portions 61a and 61b of the razor head 61 to the rectangular portion 32 of the head support portion 31 in a manner that protrudes from the rectangular portion 32 toward the grip portion 11, the razor head 61 can be positioned near the apex 17 of the triangular portion 33. Since the deformation near the apex 17 of the triangular portion 33 is suppressed when an external force is applied to the head support portion 31 in the bending direction, the bending of the head support portion 31, which bends toward the abdomen 22a and 22b, can be moderately suppressed in the bending direction after assembly, thus stabilizing the position of the razor head 61 in the bending direction.

[0370] Furthermore, in the shaver 1 described above, since the head support 31 and the grip 11 cause the shaver head 61 to elastically deform and exert force on the user's skin when the user brings the shaver head 61 into contact with the skin, the grip 11 and the head support 31 formed of paper have appropriate elasticity, which can suppress excessive pressure on the skin.

[0371] Furthermore, in the shaver 1 described above, the insertion part 51 is formed on one side relative to the center line CL. By pressing and deforming, the insertion hole part 52 is formed on the other side relative to the center line CL, in a position opposite to the insertion part 51 in the assembled state, and is also formed by pressing and deforming. Then, in the assembled state, the insertion part 51 is inserted into the insertion hole part 52 and fitted, thereby fixing the grip part 11 in a bent state along the center crease 41. Thus, in the assembled state, since the insertion part 51 and the insertion hole part 52 can be fitted together, the elasticity of the paper in the center crease 41 portion that causes the grip part 11 to open on the abdomen 22a and 22b sides can be suppressed, so the grip part 11 can be maintained in a shape that is easy for the user to hold. In addition, since the bending of the head support part 31 towards the back 21 can be suppressed, the head support part 31 can be maintained in a moderately bent state relative to the grip part 11.

[0372] Furthermore, in the shaver 3 of the above-described modified example 2, in the assembled state, the slit portion 71 is formed so that it extends from the back 21 toward the abdomen 22a and 22b. By bending the slit portion 71, the grip portion 11 is fixed in a bent state along the central crease 41. Therefore, in the assembled state, since the elasticity of the paper at the central crease 41 can be suppressed, preventing the grip portion 11 from opening on the ventral side, the grip portion 11 can be maintained in a shape that is easy for the user to hold. Furthermore, since the bending of the head support portion 31 toward the back 21 can be suppressed, the head support portion 31 can be maintained in a state that is moderately bent relative to the grip portion 11.

[0373] Furthermore, in the shaver 4 of the aforementioned modified example 3, in the pre-assembly state, the right protrusion 81 is formed to protrude outward from one of the edges 12a and 12b, and the cutout 82 is formed on the other edge. Then, in the post-assembly state, the right protrusion 81 is inserted into the cutout 82 and fitted, thereby fixing the grip 11 in a bent state along the central crease 41. As a result, since the elasticity of the paper at the central crease 41 can be suppressed from causing the grip 11 to open on the ventral side in the post-assembly state, the grip 11 can be maintained in a shape that is easy for the user to hold. In addition, since the bending of the head support 31 towards the back 21 can be suppressed, the head support 31 can be maintained in a moderately bent state relative to the grip 11.

[0374] <3. Supplementary Matters>

[0375] The foregoing has provided a detailed description of the embodiments and variations of the present invention. The above description is merely illustrative of one configuration and one operation example; the scope of the present invention is not limited to such trivial implementation methods and variations, but is broadly interpreted as the scope that can be understood by those skilled in the art based on the same technical concept.

[0376] Industrial applicability

[0377] The razor of the present invention is suitable for use as an environmentally friendly razor, etc.

Claims

1. A razor comprising a grip portion for a user to hold, a head support portion integrally formed with said grip portion, and a razor head mounted on said head support portion, assembled by bending. Both the grip and the head support are made of paper. The razor head is entirely made of metal and has a blade body and a frame for housing the blade body. The frame has a cutout at least a portion of its peripheral edge, the cutout being formed on the side opposite to the head support, through which hair cut by the blade can pass. The frame includes a front housing and a rear housing, the front housing having an opening where the blade body protrudes and the cutout portion. The front housing is box-shaped and open on the side opposite to the rear housing. The rear housing is box-shaped and open on the side opposite to the front housing. The front housing is configured to cover the rear housing.

2. The razor according to claim 1, wherein, The shaver head is directly bonded to the two end supports in the bonding area of ​​the frame, excluding the non-bonding area set within a specified range from the periphery.

3. The razor according to claim 2, wherein, At least a portion of the adhesive area of ​​the frame is planar.

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