JP2023182237A - razor - Google Patents

Abstract

To provide a razor which can be easily assembled from a sheet material.SOLUTION: The razor has a blade fixing member attached to a shank body. The blade fixing member has a blade support piece cut up from one surface of a sheet material, and a blade tip exposure port formed through cutting-up of the blade support piece. The tip of a blade is fixed to the blade support piece so as to be positioned at the blade tip exposure port. The shank body has a handle assembled from the sheet material and gripped by a user, and a head to which the blade fixing member is attached. The head has an attachment surface for attaching the blade fixing member, and an attachment connected to the tip side of the handle via a first fold line and constituting the attachment surface. An opening is formed in the attachment, the blade fixing member has the blade support piece inserted through the opening into the shank body and attached so as to direct the blade tip toward the first fold line.SELECTED DRAWING: Figure 1

Description

The present invention relates to a razor.

A razor consists of a razor head (sometimes called a cartridge, etc.) in which a metal blade is housed in a resin case, a head part to which the razor head is attached, and a handle part for the user to grip and operate. It is well known to have an integrated handle and a T-shape as a whole. The razor head usually has a metal blade fixed to a hard plastic frame, and the handle is usually made of hard plastic, metal, or the like. For this reason, there are problems in that it is difficult to fold or disassemble, it is necessary to secure a large space for accommodation and storage, and it is inconvenient to carry.

Furthermore, it is extremely difficult and virtually impossible to separate the plastic frame and the metal blade, and the materials are treated as combustible or noncombustible materials together with the handle, and the materials have not been effectively recycled. Additionally, there was a risk of injury to workers from the metal blades when attempting to separate the materials.

On the other hand, in accommodation facilities such as inns and hotels, disposable razors whose razor heads and handles are made of plastic are sometimes provided as amenities. In recent years, issues such as marine pollution caused by microplastics have attracted attention, and the shift away from plastics is progressing worldwide for environmental protection reasons, and in Japan, the ``Act on Promotion of Plastic Resource Recycling'' has been enacted. For example, it has become mandatory for certain businesses, such as the hotel industry, to reduce the use of single-use plastic products. The ``Act on Promotion of Plastic Resource Recycling, etc.'' specifies plastic razors as ``specified plastic-using products,'' and the use of plastic-free razors is attracting attention.

For example, Patent Document 1 below proposes a razor whose handle is made of paper and is formed by folding and assembling thin sheets. This razor's handle is made of paper, which reduces the amount of plastic used overall, and it also has improved storage and transportability because it can be transported and stored in sheet form. For example, it can be delivered in sheet form to a store or accommodation facility, stored in a backyard in sheet form, or assembled and used when necessary.

Patent No. 68458478

However, although the razor in Cited Document 1 has a handle made of paper, the razor head (cartridge) has a metal blade fixed to a hard plastic frame, so it is difficult to dispose of or recycle. It was sometimes necessary to separate the razor head from the handle.

On the other hand, razors with handles made of plastic or metal have a mechanism in which the razor head attached to the handle moves to follow the curved surface of the skin, also known as an oscillating head or oscillating mechanism. Although this type of razor is widely accepted by users, there is no razor that is formed by folding and assembling thin sheets that has such an oscillating mechanism.

In the razor of Cited Document 1, the razor head (cartridge) is urged against the user's skin by the bending of the handle, but the razor head itself does not move, and the contact between the razor head and the skin The only change is the surface pressure.

Furthermore, the razor of Patent Document 1 requires a plurality of folding steps in order to form a handle portion of the handle body, in particular, for gripping, and further simplification of assembly is required.

Therefore, the main object of the present invention is to make it possible to dispose or recycle the razor head without disassembling and separating the razor head or separating the razor head and handle, and to easily assemble the razor head from the sheet shape. Another object of the present invention is to provide a razor head and a razor that can be used in the present invention, and a further object is to provide a razor that has an oscillation mechanism that allows the blade to follow a curved surface.

The first means to solve the above problem is
A razor in which a blade fixing member is attached to a handle,
The blade fixing member is
It has a blade support piece cut and raised from one side of the sheet material, and a blade edge exposure opening formed by cutting and raising the blade support piece,
The cutting edge of the blade is fixed to the blade support piece so that it is located at the cutting edge exposure opening,
The handle is
Assembled from sheet materials,
a handle portion to be grasped by a user;
a head portion to which the blade fixing member is attached, the head portion comprising:
It has a mounting surface for attaching the blade fixing member, and a mounting portion that is connected to the distal end side of the handle portion via the first fold line and constitutes the mounting surface,
An opening is formed in the attachment part, and the blade fixing member is attached to the handle body with the blade support piece inserted through the opening and the blade edge facing the first fold line.
This razor is characterized by:

The second means is
The blade fixing member is
It has a front part, a pair of flaps, and a fixing part formed on each flap,
A cutting edge exposure opening is formed on the front part,
Each flap is positioned across the blade edge exposure opening,
The blade support piece is inserted through the opening, each flap wraps around the edge of the attachment part to fix the fixing parts to each other, and the blade support piece is covered by the flap.
This is a razor according to the first means above.

The third means is
The handle body is cut and raised from the handle part with the mounting part side as the tip, and has a tongue piece part that generates leaf spring elasticity by this cut and raised part,
The head part is
The mounting part can swing around the first fold line,
It has a back plate part that is folded back at a second fold line arranged parallel to the first fold line and is located closer to the rear end of the handle part than the tip of the mounting part,
The back plate part folded back along the second fold line is inserted between the cut-up tongue piece part and the handle part,
The tongue portion presses the back plate portion and generates an elastic bias against pushing of the tongue portion of the back plate portion toward the proximal end side as the mounting portion swings.
This is a razor according to the first or second means above.

According to the present invention, it is possible to dispose or recycle the razor head without disassembling and separating it, and without separating the razor head and the handle, and it is also possible to easily assemble it from a sheet shape. A razor is provided, and further provided is a razor having an oscillation mechanism that allows the blade to follow curved surfaces.

FIG. 2 is a front view of the razor of the embodiment. FIG. 3 is a rear view of the razor of the embodiment. FIG. 2 is a side view of the razor of the embodiment. FIG. 2 is a perspective view of the razor of the embodiment from the front side. It is a perspective view from the back side of the razor of an embodiment. It is a developed view of the frame. FIG. 3 is a rear view of a frame body on which a blade support piece is formed. FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 7; FIG. 3 is a rear view of the frame body in which the blade is fixed to the blade support piece. FIG. 9 is a sectional view taken along line XX in FIG. 9; FIG. 3 is a front view of a frame body in which a blade is fixed to a blade support piece. FIG. 7 is a side view illustrating how the blade fixing member is attached to the handle body. FIG. 3 is a side view showing how the blade fixing member is attached to the handle body. FIG. 7 is a partially sectional view showing a state in which the blade fixing member is attached to the handle body. It is a developed view of the handle body. It is a first diagram showing one form of a blade fixing member. FIG. 3 is a second diagram showing one form of the blade fixing member. It is a third diagram showing one form of a blade fixing member. FIG. 2 is a cross-sectional view of multilayer paper.

Next, embodiments of the razor according to the present invention will be described in detail below with reference to FIGS. 1 to 19. However, the present invention is not limited to the illustrated shape or this embodiment. Within the scope of the present invention, the detailed shape and position of each part can be changed within a range that does not impede the effects of the present invention. In addition, the terms "front", "back", "top", "bottom", "left", and "right" in the present invention and this specification change depending on the position of the viewer, and do not refer to absolute positions. It is not a word that indicates. Further, words such as "first" and "second" do not necessarily indicate the order of operations.

As particularly shown in FIGS. 1 to 5, the razor R of this embodiment includes a blade fixing member 2 to which a razor blade 21 is fixed, and a handle 1. As shown in particular in FIGS. 6 to 11, the blade fixing member 2 is in the form of a sheet when unfolded, and is attached to a frame 22 that is assembled by folding the sheet material 20. The blade 21 is fixed and has a front part 23 that constitutes a front face 23F that is slid over the skin during use.

This blade fixing member 2 characteristically has a blade support piece 26 cut and raised from the front part 23 and a blade edge exposure opening 27 formed by cutting and raising the blade support piece 26 . In the illustrated form, in particular, the ends 24E, 24E of the slit 24 formed in the sheet material 20 constituting the frame 22 and having a shape convex from one side to the other, preferably connect the ends. A blade support piece 26 is formed by cutting and raising the area surrounded by the folding line 25 and the slit 24 along the folding line 25 to the back side, that is, the direction opposite to the front face 23F. It has a cutting edge exposure opening 27. The razor blade 21 has its proximal end fixed to the blade support piece 26, and the blade edge 21t is exposed from the blade edge exposure opening 27 to the front side. In addition, although the front part 23 of the form of illustration has a rectangular shape surrounded by a pair of long edges 23L, 23L and a pair of short edges 23S, 23S, it is not necessarily limited to this shape. It can be formed into any suitable shape as long as it does not impede the effects of the present invention. Furthermore, the width of the slit 24 is not limited either. Further, the means for forming a cut-and-raised portion that becomes a blade support piece on the front portion is not limited to the slit 24, and a hollow portion of an appropriate shape may be provided on the front portion. That is, the shape of the edge of the blade support piece and the edge of the edge exposure opening do not necessarily have to match.

The method of fixing the razor blade 21 to the blade support piece 26 is not necessarily limited. It can be fixed by any suitable fixing means, such as chemical fixing means such as adhesive or adhesive tape, or mechanical fixing means such as caulking or eyelets. The illustrated embodiment is a particularly preferred embodiment in which the blade 21 is fixed by caulking 28. Since the razor R is often used in a manner where it comes into contact with water, it is desirable that the razor R be provided with mechanical fixing means such as caulking 28. Although the specific type of adhesive is not limited, if the adhesive is used for fixing, it is desirable to use a water-resistant adhesive.

As the blade 21, as shown in FIG. 10, a thin plate-shaped razor blade made of a known common metal such as iron or stainless steel can be used. Furthermore, among the razors R, there is a multi-blade type, called a two-blade, three-blade, etc., in which a plurality of blades are fixed with their cutting edges shifted in position. In recent years, six-bladed ones have also become known. The razor R according to the present invention can also be of a multi-blade type, such as a two-blade or three-blade type, by fixing a plurality of blades to the blade support piece 26.

The illustrated form is a three-blade form. Specifically, as shown in FIG. 10, three blades 21 are stacked with the positions of the blade edges 21t shifted through a spacer 21S having a predetermined thickness. A caulking hole is formed in each blade 21 and spacer 21S, and by aligning the caulking hole of each blade 21 and spacer 21S and fixing it to the blade support piece 26, the thickness of the spacer 21S and the caulking hole can be adjusted. Depending on the position, the cutting edges 21t are fixed at an appropriate preset interval. In this embodiment, the razor has three blades, but the number of razor blades in the present invention is not limited. It may have two blades or three or more blades. In the case of multiple blades, if the fixing means is the caulking 28 in this way, the cutting edges 21t of the multiple blades can be easily fixed at appropriate positions, and there is less risk of separation during use. Excellent. The material of the spacer 21S is not limited, but appropriate metals such as iron and stainless steel, and hard materials such as ceramics and wood are preferably used. Further, in the illustrated embodiment, two spacers 21S are used, but three or four spacers 21S may be used. A plurality of spacers 21S may be arranged between the blades. Furthermore, for example, a spacer 21S may be interposed between the caulking head 28H located on the back side in FIG. 10 and the blade located on the furthest back side. In this case, since the blade located on the rearmost side in particular is pressed by a portion other than the caulking 28, the blade is less likely to be damaged when securing the blade, and the blade is more securely secured to the blade support piece. can do.

On the other hand, the handle 1 of this embodiment has a handle part 10 that is held by a user and a head part 30 to which the blade fixing member 2 is attached, as shown in FIGS. 1 to 5 in particular. In particular, as shown in a developed view in FIG. 15, it is assembled from a single sheet material 1S.

The head portion 30 of the handle 1 has a mounting portion 31 connected to the distal end side of the handle portion 10 via a first fold line 41, and a second fold line 42 arranged parallel to the first fold line 41. A back plate part 32 is connected to the mounting part 31 via the mounting part 31. The mounting portion 31 has a mounting surface 31A for mounting the blade fixing member 2, and this mounting surface 31A is formed on a surface opposite to the rear end direction of the handle portion. Note that the number of the first fold line 41 and the second fold line 42 does not necessarily have to be one, and a plurality of them may be provided. In the illustrated form, a shape having two second fold lines 42 is shown.

The handle portion 10 has an elongated rear end, a fan shape that gradually widens at the tip, and a first fold line 41 is located at the edge thereof, and is connected to the attachment portion 31.

In this razor R, an opening 36 is formed in the mounting portion 31 of the handle 1, and the blade support piece 26 is inserted into the opening 36 of the blade fixing member 2 relative to the handle 1. The blade 21 is attached with the cutting edge 21t facing the first fold line 41. In the blade fixing member 2 of this embodiment, the area surrounded by the fold line 25 and the slit 24 is folded back along the fold line 25 in the opposite direction from the front, so that the blade support piece 26 is on the back side. However, in this razor R, the blade support piece 26 is inserted through the opening 36 of the attachment part 31 and is positioned so as to be stored on the back side, and the handle body 1 is positioned so that the front side 23F is flat. It is attached to the attachment part 31. In addition, since the blade edge 21t is oriented toward the first fold line 41, the front surface 23F of the blade fixing member 2 can be slid on the skin by pulling the handle part 10 during use, thereby removing body hair, etc. It can be cut by the cutting edge 21t.

Although there are no restrictions on the fixing of the attachment portion 31 of the handle 1 to the blade fixing member 2, it is desirable to prevent unnecessary unevenness from being formed on the front surface 23F of the blade fixing member 2, which is the surface that comes into contact with the skin. In this embodiment, the back side of the front part 23 of the blade fixing member 2 and the mounting surface 31A of the handle body 1 are bonded and fixed using adhesive tape. Note that it may be fixed by adhering with an adhesive. In this case, the type of adhesive is not limited, but since the razor R is often used in a manner where it comes into contact with water, it is desirable to use a water-based or oil-based adhesive with water resistance. Of course, it may be fixed at an appropriate position using mechanical fixing means such as caulking.

Further, as particularly shown in FIG. 14, this razor R is further provided with the blade fixing member 2 in a state where at least a part of the blade support piece 26 is inserted through the opening 36 of the attachment part 31 and positioned on the back side. is moved slightly toward the tip side of the handle 1 so that the edge 36e of the opening 36 of the attachment part 31 is located between the blade support piece 26 and the back surface of the front part 23 of the blade fixing member 2. Fixed. Therefore, the edge 36e of the opening 36 prevents the blade support piece 26 from completely lying down to the rear surface position of the attachment portion 31. This regulation prevents the cutting edge 21t from moving excessively toward the back side. That is, since the frame 22 of the blade fixing member 2 is made of a sheet material, the blade support piece 26 folded back at the fold line 25 is a free piece that can freely move around the fold line 25. . Therefore, if the edge 36e of the opening 36 of the attachment part 31 is located between the blade support piece 26 and the back surface of the front part 23 of the blade fixing member 2, the blade support piece 2 is regulated from completely lying down at the back surface position of the attachment part 31. Furthermore, in this embodiment, the blade edge 21t is configured to be at a desired appropriate position at a predetermined position where the blade support piece 26 is prevented from falling down to the back surface position. Although the specific position of the cutting edge 21t is not limited, in one preferred form, the angle of the cutting edge with respect to the sliding direction is 15 to 19 degrees, preferably 16 to 18 degrees. It may be adjusted in this manner. Note that the position of the cutting edge 21t here includes the angle between the blade 21 and the opening surface, and the protrusion length from the opening surface.

On the other hand, in this razor R, if the blade 21 is fixed by an eyelet or a caulk 28, the head 28H of the caulk 28 etc. protruding from the blade support piece 26 will also be at the position of the blade edge 21t, as shown in FIG. can be a deciding factor. That is, since the head 28H of the caulking 28 is located between the blade support piece 26 and the back surface of the attachment portion 31, it prevents the separation distance between the two from becoming close. Therefore, by setting the position of the cutting edge to a preset desired position in the regulated position, the caulking 28 can be used as an element for determining the position of the cutting edge 21t at an appropriate position.

On the other hand, as shown in FIGS. 15 and 16, in a preferable form, this razor R has an opening 36 formed in the attachment portion 31 of the handle 1, with the edge extending from the attachment surface toward the back side. It has a pair of guide parts 37 that are bent to stand upright, and the edge of the blade 21 fixed to the blade support piece 26 of the blade fixing member 2 is guided between the guide parts 37. The blade fixing member 2 is inserted through the opening 36 so that the blade fixing member 2 can be easily positioned at an appropriate mounting position with respect to the mounting portion 31. Note that the guide by the guide portion 37 is not limited to the edge of the blade 21, but may be the edge of the blade support piece 26, the edge of the spacer 21S, or the like. It is only necessary that the portion of the blade fixing member 2 inserted through the opening 36 be guided.

As described above, the razor R of this embodiment has a structure in which both the frame body 22 of the blade fixing member 2 and the handle body 1 are easily assembled from a single sheet material such as paper. In addition, since parts other than the metal blade and crimping can be constructed from paper materials, there is no need to disassemble and separate the razor head, or to separate the razor head from the handle. It is possible to recycle. In other words, regarding recycling, for example, as disclosed in Japanese Patent Application Laid-open No. 2020-24485 "Confidential Used Paper Recycling Method and Confidential Used Paper Recycling System," the used paper pulp manufacturing process is equipped with a process for separating heavy foreign substances such as metals. Metal blades can be collected and recycled as resources. Therefore, the razor R according to the present invention can be disposed of or recycled without disassembling and separating the razor head or separating the razor head and the handle as described above, which saves resources. Excellent in terms of effective utilization.

Furthermore, as a particularly preferable form, the blade fixing member 2 of this embodiment is provided with a pair of flaps 22F connected to the front part 23, as shown in FIGS. 9 to 11 and 16 to 18. In the illustrated form, a pair of flaps are connected via the side surface portion 22S. Each flap 22F is located across the cutting edge exposure opening 27 in the direction in which the cutting edge 21t of the blade 21 extends, and each flap 22F has a fixing part that fixes the tip ends of the flaps to each other. . In the illustrated form, a locking groove 29 is formed at the tip of each flap 22F, and the locking groove 29 are configured so that they can be engaged.

In the razor R of this embodiment, as a particularly preferable form, the blade support piece 26 of the blade fixing member 2 is inserted into the handle body 1 from the opening 36, as shown in FIGS. 1 and 16 to 18. In this state, each flap 22F wraps around the edge 31e of the mounting part 31 in the extending direction of the cutting edge, and the locking grooves 29, which are fixed parts, are locked with each other, and the flaps 22F are located on the back side of the mounting part 31. The blade support piece 26 that is attached thereto is covered by the flaps 22F, 22F. In this way, since the blade support piece 26 is covered on the back side of the attachment part, it is difficult to unintentionally touch the blade support piece 26, increasing safety, and the fixed part of the blade is difficult to see from the outside, improving the design. You will also become better at sex.

Furthermore, as a particularly preferable embodiment of this razor R, in particular, as shown in FIG. Movement of the blade support piece 26 in the rear side direction is restricted so that it does not protrude from the blade edge exposure opening 27 to the front side. The position of the blade 21 is always kept at an appropriate position by restricting the movement of the blade support piece 26 toward the rear side and restricting the movement toward the front side by the edge 36e of the opening 36 of the mounting portion 31. .

On the other hand, as a particularly preferable embodiment of the handle 1 of this embodiment, as shown in FIGS. It is formed so as to rise from the handle portion 10 side, and is connected to be swingable about the first fold line 41 as an axis. That is, the attachment part 31 and the handle part 10 are connected so that the angle between them can be changed. As mentioned above, the attachment part 31 has the attachment surface 31A for attaching the blade fixing member 2, and since this attachment surface is formed on the surface opposite to the rear end direction of the handle part, this embodiment In this razor, the blade fixing member 2 attached to the mounting surface also moves when the mounting portion 31 swings about the first fold line 41.

Furthermore, the handle body 1 in this preferred embodiment has a tongue portion 50 which is cut and raised from the handle portion 10 with the attachment portion 31 side as the tip, and which generates leaf spring elasticity by this cut and raise. The plate spring elasticity of the tongue portion 50 is adjusted mainly by the elastic deformability such as rigidity and stiffness of the sheet material, the width and length of the tongue portion 50, and the overall shape of the handle portion 10.

On the other hand, the back plate part 32 is folded back along the second fold line 42 and is located closer to the rear end of the handle part 10 than the attachment part 31, and in particular, the back plate part 32 is folded back along the second fold line 42 and is located closer to the rear end of the handle part 10 than the attachment part 31. 50 and the handle portion 10, and the back plate portion 32 is configured to be pressed by the tongue portion 50. In the illustrated embodiment, the tongue portion 50 not only pushes the back plate portion 32 but also holds the back plate portion 32 between the handle portion 10 and the tongue portion 50 . At this time, if the force of the tongue portion 50 to return to the position before being cut and raised is strong, an elastic biasing force is applied to the back plate portion 32, and the tongue portion 50 is more strongly clamped.

Structurally, in the handle body 1 of this particularly preferred embodiment, the attachment part 31 is swingable about the first fold line 41, and the second fold line 42 is parallel to the first fold line 41. Therefore, when the attachment section 31 moves toward the rear end of the handle section 10 around the first fold line 41, the second fold line 42 moves toward the rear end side of the handle section 10. do. As a result, the back plate portion 32 can be inserted closer to the proximal end portion 51 side of the tongue portion 50. Further, as the attachment portion 31 moves toward the rear end of the handle portion 10 around the first fold line 41, the attachment portion 31 becomes more upright with respect to the handle portion 10. As a result, not only is the back plate portion 32 inserted toward the proximal end portion 51 of the tongue portion 50, but also the back plate portion 32 attempts to push up the tongue portion 50. That is, since the tongue piece portion 50 becomes more cut and raised, an elastic force that pushes back the back plate portion 32 is generated and increases. In this manner, in this embodiment, elastic bias is generated when the tongue portion 50 of the back plate portion 32 is pushed toward the base end portion 51 side as the mounting portion 31 swings.

Here, as a particularly preferable form, the handle body 1 has a handle portion bending line 11 extending from the rear end side toward the front end side at the widthwise central portion of the surface opposite to the cutting and raising direction of the tongue portion 50 of the handle portion 10. is provided, and the handle portion 10 is bent into a substantially V-shape in the width direction, that is, in a direction perpendicular to the direction in which the tongue portion 50 is cut and raised, and with the cut and raised side being the valley side. It has a three-dimensional handle part 10. When the handle portion 10 is V-shaped in this manner, it has a superior design compared to a flat handle portion, and the operability is improved in each step.

Furthermore, this bending of the handle portion 10 makes the function and cutting and raising of the tongue portion 50 suitable. That is, when the handle portion 10 is bent into a V-shape, the base end portion 51 of the tongue portion 50 is narrowed. As a result, the tip side of the tongue portion 50 can be lifted from the handle portion 10. At this time, it is desirable that the handle part 10 be bent like the above-mentioned handle part 10 so that it can be lifted toward the valley side. Furthermore, when the handle bending line 11 reaches the proximal end 51 of the tongue 50 as in the illustrated embodiment, the proximal end 51 of the tongue 50 is also bent slightly. In the portion 51, bending due to plastic deformation that causes the spring to no longer function as a spring is less likely to occur, and elastic biasing force is more likely to be generated.

Furthermore, as a particularly preferable form, the handle body 1 is provided with a sliding piece 33 that contacts the handle part 10 at the tip of the back plate part 32. It is configured to slide on the section 10. The sliding pieces 33 are provided as a pair so as to be in contact with the remaining end positions when the tongue piece 50 is cut and raised, that is, the positions where the tongue piece 50 is sandwiched between them. In addition to ensuring stable movement, the friction between the back plate portion 32 and the handle portion 10 is adjusted, and the tongue portion 50 is adjusted to a desired elastic biasing force against the back plate portion 32. It becomes easier.

Furthermore, as a particularly preferable form, the handle 1 is provided with a notch 12 on the side edge of the handle 10, so that when the handle 10 is bent into a V-shape, for example, The distance between the side edges on the front end side and the rear end side of the handle portion 10 is slightly different, and a step is formed at the position of the notch portion 12. The sliding piece 33 that slides on the handle part 10 in accordance with the movement of the attachment part 31 comes into contact with this step, thereby preventing the back plate part 32 from moving excessively toward the rear end side of the handle part 10. This prevents the head from swinging in an unintended and excessive range, increasing safety during use.

The size of the handle of this embodiment is not limited to the size of a general razor, but the total length L1 in the unfolded state is 120 to 138 mm, the total length after assembly is 80 to 100 mm, and the width L2 of the head part. However, it is preferable that the width L3 of the handle is 35 to 49 mm and 15 to 20 mm. This size is the size of a common razor, and a strong razor handle can be constructed from the sheet material.

Here, each folding line on the frame 22 and handle 1 of the blade fixing member 2 is a line to facilitate folding or bending of the sheet material, and is simply a printed line for positioning. Preferably, they are ruled lines, also called creases, perforations, and half slits, and in particular, the adjustment of the elastic biasing force of the tongue, the smoothness of the rocking of the mounting part, and the smoothness of the back plate part. A half slit is preferable for smooth movement and ease of folding. However, not all lines need to be of the same type. They can be appropriately arranged in consideration of the required strength and the stress required for bending. Furthermore, it is not necessary to make the cut tie ratio the same when using perforations and the slit depth when forming half slits.

Further, sheet materials 1S and 20 particularly suitable for the frame 22 and handle 1 of the blade fixing member 2 of this embodiment will be explained. The sheet materials 1S and 20 according to the present embodiment may be a single sheet-shaped material that can be easily transported and stored. However, as mentioned above, from the viewpoint of eliminating plastics, it is desirable to use paper made from pulp fibers. Specifically, corrugated paper, coated cardboard, and multilayer paper in which a plurality of paper layers are laminated can be exemplified. Of course, it is more desirable that the paper be made of only fibers derived from natural materials and not synthetic fibers including plastics. Preferably, paper is made of only pulp fibers. It may be water resistant or oil resistant. Also, particularly preferred paper is multilayer paper having three or more paper layers. As shown in FIG. 19, the multilayer paper 90 has a plurality of paper layers stacked on top of each other, so the characteristics of each layer can be changed, and it can be easily folded while having strength. For example, by combining a flexible middle layer 92 with a pair of surface layers 91 that are hard but tend to break easily, although they have excellent water resistance and abrasion resistance, they will have excellent toughness and durability, and can be bent while having strength. It can be made easier to assemble. In addition, when each fold line is made into a half slit, multiple layers including the surface layer can be prevented from being completely cut, and the risk of breakage at each fold line is greatly reduced, and it is possible to provide flexibility. . Note that the multilayer paper 90 can be manufactured by multilayer papermaking. Moreover, the multilayer paper 90 may be one that is commercially available, and examples thereof include Elipla Paper and Elipla Plus manufactured by Dainichi Paper Industries, Ltd. From this point of view, it is preferable that the frame body 22 and the handle body 1 of this embodiment be assembled from multilayer paper, and in particular, the folding line should be a half slit.

The sheet materials 1S and 20 in the frame body 22 and the handle body 1 constituting the blade fixing member 2 may be the same or different. In one embodiment, when the sheet material constituting the handle is paper, its basis weight is preferably 700 g/m ² or more, more preferably 750 g/m ² or more, particularly preferably 800 g/m ² or more. . With this basis weight, it is easy to assemble by bending each part, and it is also easy to obtain sufficient rigidity and strength. Although the upper limit of basis weight is not limited, there is a risk that creases may easily occur due to calender rolls etc. during paper making, and from this point of view, the upper limit is preferably 1400 g/m ² and more preferably 1240 g/m ² . The paper thickness is preferably 900 μm or more and 1,400 μm or less, more preferably 950 μm or more and 1,350 μm or less.

When the sheet material constituting the frame constituting the blade fixing member 2 is made of paper, its basis weight is preferably 200 g/m ² or more, more preferably 230 g/m ² or more, particularly preferably 250 g/m ² That's all. With paper of this basis weight, it is easy to assemble by folding each part. Although the upper limit of basis weight is not limited, it is 400 g/m ² . If the basis weight is too high, the rigidity will be too strong and it will be difficult to form the blade support piece 26 by bending. The paper thickness is preferably 200 μm or more and 400 μm or less, more preferably 250 μm or more and 350 μm or less. The frame body 22 has a structure in which the area surrounded by the fold line 25 and the slit 24 is folded back at the fold line 25 to form the blade support piece 26 and the blade edge exposure opening 27, so if the thickness is excessive, It is difficult to fold the blade linearly along the fold line, and the blade tends to be too stiff, making it difficult to form the blade support piece accurately. Further, when attaching the blade fixed to the blade support piece so as to be exposed from the blade edge exposure opening 27, if the thickness is excessive, the gap between the skin and the blade edge tends to become wide and adjustment becomes difficult. If it is within the above range, it is sufficiently easy to adjust. Further, it is desirable that the sheet material constituting the frame body 22 has a slightly higher density than the sheet material constituting the handle body 1 so that it can easily exhibit stiffness. Since it forms the front surface that touches the skin, it is easy to create a smooth surface, and it is also easy to improve surface strength.

Note that the basis weight is a value measured in accordance with "Paper and paperboard - basis weight measurement method" described in JIS P 8124 (2011), and paper thickness is a value measured in accordance with "Paper and paperboard - basis weight measurement method" described in JIS P 8118 (2014). This is a value measured in accordance with the "Thickness and Density Test Method for Paperboard and Paperboard".

When the sheet materials 1S and 20 for the frame body 22 and the handle body 1 are made of paper, the constituent pulp fibers of the paper are not necessarily limited, but preferable constituent pulp fibers are softwood unbleached kraft pulp (NUKP), softwood half-wood, etc. Softwood kraft pulp such as bleached kraft pulp (NSBKP) and softwood bleached kraft pulp (NBKP), and hardwood kraft pulp such as hardwood unbleached kraft pulp (LUKP), hardwood semi-bleached kraft pulp (LSBKP), and hardwood bleached kraft pulp (LBKP) It is. Other pulps include chemical pulps such as waste paper pulp, hardwood sulfite pulp, softwood sulfite pulp, and various known pulps such as chemically or mechanically produced pulps from non-wood fibers such as kenaf, hemp, and reeds. A suitable combination of pulps may be used. Since it is easy to develop strength, it is desirable that the content of softwood kraft pulp and hardwood kraft pulp is 90 to 100% by mass. In this case, the blending ratio of softwood kraft pulp and hardwood kraft pulp is preferably 5:95 to 30:70. If a razor with a bleached clean feel and a hard design is desired, it is particularly preferable to use bleached softwood kraft pulp and bleached hardwood kraft pulp, which are white pulps and have a high degree of whiteness. Note that the constituent pulps of the sheet material 20 constituting the frame body 22 and the sheet material 1S constituting the handle body 1 may or may not be the same.

Further, when the sheet materials 1S and 20 for the frame body 22 and the handle body 1 are made of particularly preferable multilayer paper 90, the number of layers is, although not limited, five to nine layers, and the number of layers of the middle layer 92 is three or more layers. , especially preferably five layers. In particular, the configuration shown in FIG. 19 has a three-layer middle layer 92. It is said that when the total number of middle layers 92 is three or more layers, the toughness and durability of the multilayer paper 90 are more likely to be exhibited. The upper limit of the total number of middle layers 92 is preferably seven layers or less from the viewpoint of maintaining interlayer strength. In addition, three to seven layers are easy to operate while maintaining interlayer strength when using a circular mesh multi-tube type paper machine. Note that the number of layers of the sheet material 20 constituting the frame body 22 and the sheet material 1S constituting the handle body 1 need not be the same.

In addition, when the sheet materials 1S and 20 constituting the frame body 22 and the handle body 1 are made of multilayer paper 90, the basis weight of the surface layer 91 and the middle layer 92 is the basis weight of the whole when the above-mentioned sheet material is paper. Preferably, in the sheet material 1S constituting the handle 1, the basis weight of the surface layer 91 is 60.0 g/m ² or more and 150.0 g/m per layer, although it can be adjusted within a range and is not particularly limited. ² or less, particularly preferably 100 to 145 g/m ² . The basis weight of the entire middle layer 92 is preferably 490 g/m ² or more and 750 g/m ² or less, particularly 600 g/m ² or more and 740 g/m ^{2 or} less. In the sheet material 20 constituting the frame 22, the basis weight of the surface layer 91 is preferably 10.0 g/m ² or more and 70.0 g/m ² or less, particularly preferably 25 to 55 g/m ² per layer. . Further, the basis weight of the entire middle layer 92 is preferably 140 g/m ² or more and 340 g/m ² or less, particularly 200 g/m ² or more and 300 g/m ^{2 or} less.

Further, when the sheet materials 1S, 20 constituting the frame body 22 and the handle body 1 are multilayer paper 90, the ratio of the total basis weight of the pair of surface layers 91, 91 to the basis weight of the entire multilayer paper 90 is 15. It is preferably 0% or more and 33.0% or less. The pair of surface layers 91 have high rigidity, and the middle layer 92 has excellent flexibility. Therefore, it is easy to bend at the folding line position, and difficult to bend at positions other than the folding line, making it easy to create a handle that is excellent in strength and ease of assembly. Note that the proportions of the sheet material 20 constituting the frame body 22 and the sheet material 1S constituting the handle body 1 do not need to be the same.

When the sheet materials 1S and 20 constituting the frame body 22 and the handle body 1 are multilayer paper 90, the composition of pulp fibers in each layer in the multilayer paper 90 is such that the surface layer 91 has a mass ratio of softwood kraft pulp and the hardwood kraft pulp. (%) is preferably 0/100 or more and 15/85 or less. Further, in the surface layer 91 and the middle layer 92 having this composition, it is preferable that the mass ratio (%) of the softwood kraft pulp and the hardwood kraft pulp is 15/85 or more and 35/65 or less. Contains a large amount of hardwood kraft pulp that is rigid and easy to increase density, giving the surface layer a high density and rigidity, while the middle layer contains a large amount of softwood kraft pulp, which is more flexible than the surface layer, so each fold line during assembly This tends to result in a handle that does not lose its strength even when folded or repeatedly folded. Note that within this range, the sheet material 20 constituting the frame body 22 and the sheet material 1S constituting the handle body 1 may have the same or different mass ratios.

In addition, when the sheet materials 1S, 20 constituting the frame body 22 and the handle body 1 are multilayer paper 90, the multilayer paper 90 is especially made by adding at least one of a sizing agent and a paper strength enhancer as a papermaking additive. It is desirable that the Easy to adjust to desired strength. Note that the multilayer paper 90 may contain various other additives within a range that does not impair the intended effects of the present invention. For example, polyvinyl alcohol, wax, etc. can be applied. In particular, it is desirable that the sheet material 20 constituting the frame be externally coated with a polyvinyl alcohol resin such as polyvinyl alcohol and a styrene-acrylic copolymer resin emulsion. Furthermore, it is desirable that paraffin wax be applied externally. Oil resistance is particularly improved by applying these external additives. The front part of the razor, which makes up the front that comes in contact with the skin, as well as the frame, are likely to come into contact with oily ingredients such as soapy water, detergents, and shaving foam in addition to water during use. It is desirable that the oil resistance is improved.

Examples of the sizing agent added to the multilayer paper 90 include a styrene sizing agent, an alkyl ketene dimer (AKD), an alkenyl succinic anhydride (ASA), a neutral rosin sizing agent, a rosin sizing agent, a modified rosin emulsion sizing agent, etc. Can be mentioned. Among these, rosin sizing agents and modified rosin emulsion sizing agents are preferred. The rosin sizing agent is not particularly limited. Rosin-based substances include, for example, reinforced rosins such as gum rosin, wood rosin, tall oil rosin, etc., modified with α,β-unsaturated carboxylic acids such as fumaric acid, maleic acid, and acrylic acid or their anhydrides; Examples include rosin esters obtained by reacting polyhydric alcohols such as glycerin, trimethylolethane, trimethylolpropane, pentaerythritol, and diglycerin. Further, rosin sizing agents include those obtained by emulsifying these alone or a mixture thereof, and those obtained by emulsifying them alone and then mixing them. Furthermore, it also includes emulsified products to which various polymers are added in order to further improve size development. The types of sizing agents added to the sheet material 20 constituting the frame 22 and the sheet material 1S constituting the handle 1 may be the same or different.

The paper strength enhancer added to the multilayer paper 90 includes various known ones such as polyacrylamide resin, polyamide resin, polyamine resin, acrylic resin, melamine resin, urea resin, and polyamide epichlorohydrin resin. can be used. Among these, it is preferable to use an amphoteric paper strength enhancer. Examples of the amphoteric polyacrylamide include copolymers of acrylamide and anionic monomers and cationic monomers, Mannich-modified copolymers of acrylamide and anionic monomers, and Hoffmann decomposition products. In particular, amphoteric polyacrylamide has a self-fixing function, so even if it is added to improve interpaper strength, it will not become excessively cationic, and by including it together with the modified rosin emulsion sizing agent, it will stabilize. can be fixed. The types of paper strength enhancers added to the sheet material 20 constituting the frame 22 and the sheet material 1S constituting the handle 1 may be the same or different.

The amount of the sizing agent added is preferably 0.5 kg/t or more and 5.0 kg/t or less in terms of solid content. The amount of the paper strength enhancer added is preferably 12 kg/t or more and 30 kg/t or less in terms of solid content. Note that "kg/t" indicates the mass (kg) per 1 ton of pulp. If the amount of sizing agent added is within this range, the front part of the razor, which makes contact with the skin, and the frame are likely to come into contact with water during use, so the water resistance will increase and sufficient strength will be achieved. Easy to hold. The amount of the sizing agent added to the sheet material 20 constituting the frame 22 and the sheet material 1S constituting the handle 1 may be the same or different.

In addition, when the sheet materials 1S and 20 constituting the frame body 22 and the handle body 1 are made of multilayer paper 90, the multilayer paper 90 contains the above-mentioned sizing agent and paper as a papermaking additive in each layer of the surface layer 91 and the middle layer 92. Preferably, at least one of the force enhancers is added. In this case, the amount of the sizing agent added to the surface layer 91 is preferably 0.5 kg/t or more and 5.0 kg/t or less in terms of solid content. Further, the amount of the sizing agent added to the middle layer 92 is preferably 2.0 kg/t or more and 5.0 kg/t or less in terms of solid content. Further, the amount of the paper strength enhancer added to each layer is preferably 12 kg/t or more and 30 kg/t or less in terms of solid content.

Further, when the frame 22 and the handle 1 are constructed of paper sheet materials 1S and 20, it is desirable that the frame 22 and the handle 1 contain a siloxane compound. When a siloxane compound is contained, stiffness, strength, and water resistance increase due to siloxane bonds. The siloxane compound is not necessarily limited as long as it has a siloxane bond, but since the frame 22 and handle 1 constitute a razor that comes into contact with the human body, it is desirable that the compound has no or low toxicity to living organisms. In addition to applying the siloxane compound to the frame 22, handle 1, or razor after assembly, the siloxane compound can be applied to the sheet material 20, 1S before assembly or to the sheet material as appropriate. After being impregnated with an alkoxysilane solution or an alkoxysilane solution processed product, it may be incorporated by heating or heating. This is desirable because the siloxane compound is contained in such a manner that it binds to the pulp fibers themselves or coats the pulp fibers.

Furthermore, the handle according to the present embodiment may contain a surface protective agent or the like, as long as it does not excessively change the coefficient of friction, surface roughness, or folding suitability, and does not impede the functions of the frame 22 and handle 1 and the effects of the present invention. It may be coated with or impregnated with an antibacterial agent or an antiviral agent.

Further, when the sheet materials 1S and 20 constituting the frame body 22 and the handle body 1 are made of paper, the paper is determined according to JAPAN TAPPI Paper Pulp Test Method No. 18-1:2000 is preferably 400 kN/m ² or more, preferably 450 kN/m ² or more. The frame body 22 and handle body 1 in the unfolded state can be easily manufactured by punching using Thomson processing or the like or cutting using a cutting plotter or the like.

When the sheet materials 1S and 20 constituting the frame body 22 and the handle body 1 are made of paper, the paper, especially the sheet materials constituting the handle body 1, has a static friction coefficient of 0.15 according to JIS P 8147 ISO horizontal method. ~0.65 is desirable. During use, the front surface rubs smoothly against the skin, and the tongue part and back plate part of the handle also rubs smoothly. In addition, in this measurement method, measurements are performed three times each on the back surfaces of the sheet material and on the front surfaces, and it is desirable that the third measurement values on the back surfaces and the front surfaces are both within the above range. In the ISO horizontal method, it is sufficient to measure at least one of the static friction coefficient of the first slip, the static friction coefficient of the third slip, or the kinetic friction coefficient of the third slip, and the static friction coefficient of the third slip is smaller than the first slip. Moreover, the variation in the coefficient of static friction at the third time is smaller. Note that the sheet material 20 constituting the frame 22 and the sheet material 1S constituting the handle 1 may have the same or different coefficients of static friction; It is preferable that the sheet material constituting 22 has a smaller coefficient of static friction.

Further, when the sheet materials 1S and 20 constituting the frame body 22 and the handle body 1 are made of paper, the paper preferably has a PPS (Parker Print Surf Roughness) of 1 to 1 on both the front and back surfaces in accordance with JIS P 8151. The thickness is preferably 8 μm, more preferably 4 to 7 μm. During use, the front surface rubs smoothly against the skin, and the tongue portion and back plate portion of the handle body rub smoothly. Note that the sheet material 20 constituting the frame body 22 and the sheet material 1S constituting the handle body 1 may have the same or different PPS.

When the sheet material constituting the frame and handle is paper, the paper preferably has an MMD value of 5 to 25 on both the front and back surfaces. When in use, the front surface rubs smoothly against the skin, and the tongue portion and back plate portion of the handle body rub smoothly. MMD is measured using a friction feel tester (KES-SE, manufactured by Kato Tech) and its equivalent. The friction element used is one that is constructed by adjoining 20 standard piano wires with a diameter of 0.5 mm and has a contact surface with a length and width of 10 mm. The sheet material 20 constituting the frame 22 and the sheet material 1S constituting the handle 1 may have the same MMD or different MMDs; It is better for the sheet material constituting the material to have a smaller MMD.

Further, when the sheet material constituting the handle is made of paper, it is desirable that the "bending strength" of the paper based on JIS K 7171 is 39 to 45 MPa. Particularly preferably, it is 40 to 42.5 MPa. Within this range, the elastic biasing force of the tongue portion and the back plate portion can be suitably exerted, the mounting surface can easily follow the curved surface of the skin, and excessive surface pressure can be prevented. Further, the "flexural modulus" based on JIS K 7171 is preferably 6500 MPa to 7500 Pa. Within this range, the elastic biasing force of the tongue portion and the back plate portion can be suitably exerted, the mounting surface can easily follow the curved surface of the skin, and excessive surface pressure can be prevented. In addition, "bending strength" and "bending elastic modulus" are measured at a test speed of 2 mm/min and a distance between fulcrums of 64 m, and the measured values are the average values of 5 times.

Furthermore, when the sheet material constituting the handle is paper, the paper must have a longitudinal tensile strength of 70 kN/m or more and a transverse tensile strength measured in accordance with JIS P 8113 (2006). It is desirable that the strength is 40 kN/m or more. If it has this tensile strength, it is suitable for folding and assembly.

In addition, when the sheet material constituting the handle is made of paper, the paper must have a Taber stiffness of 150 mN・m or more in the vertical direction, measured in accordance with JIS P 8125 (2000), and a rigidity in the horizontal direction. It is desirable that it is 70 mN·m or more. This range makes it easy to fold and assemble.

As described in detail above, the razor according to the present embodiment can be disposed of or recycled without disassembling and separating the razor head, and without separating the razor head and handle. A razor that can be easily assembled due to its shape is provided, and a razor that has an oscillation mechanism that allows the blade to follow curved surfaces is provided.

R...Razor, 1...Handle, 2...Blade fixing member, 20...Sheet material related to the frame of the blade fixing member (frame in unfolded state), 21...Blade, 21S...Spacer, 21t...Blade tip, 22...Frame Body, 22S...Side part, 22F...Flap, 23...Front part, 23F...Front, 23L...Longitudinal edge, 23S...Short edge, 24...Slit, 24E...Slit end, 25...Fold line, 26...Blade support Piece, 27...Blade tip exposure opening, 28...Caulking, 28H...Head of caulking, 29...Latching groove, 1S...Sheet material related to the handle (handle in unfolded state), 10...Handle part, 11...Handle part Folding line, 12... Notch, 30... Head, 31... Mounting part, 31A... Mounting surface, 31e... Edge of mounting part, 32... Back plate part, 32S... Slit, 33... Sliding piece, 36... Opening, 36e... Edge of opening, 37... Guide part, 41... First fold line, 42... Second fold line, 43... Third fold line, 50... Tongue piece part, 51... Base of tongue piece part edge.

Claims (3)

A razor in which a blade fixing member is attached to a handle,
The blade fixing member is
It has a blade support piece cut and raised from one side of the sheet material, and a blade edge exposure opening formed by cutting and raising the blade support piece,
The cutting edge of the blade is fixed to the blade support piece so that it is located at the cutting edge exposure opening,
The handle is
Assembled from sheet materials,
a handle portion to be grasped by a user;
a head portion to which the blade fixing member is attached, the head portion comprising:
It has a mounting surface for attaching the blade fixing member, and a mounting portion that is connected to the distal end side of the handle portion via the first fold line and constitutes the mounting surface,
An opening is formed in the attachment part, and the blade fixing member is attached to the handle body, with the blade support piece being inserted through the opening and the blade edge facing the first fold line.
A razor characterized by: The blade fixing member is
It has a front part, a pair of flaps, and a fixing part formed on each flap,
A cutting edge exposure opening is formed on the front part,
Each flap is positioned across the blade edge exposure opening,
The blade support piece is inserted through the opening, each flap wraps around the edge of the attachment part to fix the fixing parts to each other, and the blade support piece is covered by the flap.
The razor according to claim 1. The handle body is cut and raised from the handle part with the mounting part side as the tip, and has a tongue piece part that generates leaf spring elasticity by this cut and raised part,
The head part is
The mounting part can swing around the first fold line,
It has a back plate part that is folded back at a second fold line arranged parallel to the first fold line and is located closer to the rear end of the handle part than the tip of the mounting part,
The back plate part folded back along the second fold line is inserted between the cut-up tongue piece part and the handle part,
The tongue portion presses the back plate portion and generates an elastic bias against pushing of the tongue portion of the back plate portion toward the proximal end side as the mounting portion swings.
The razor according to claim 1 or 2.

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