JP2017055868A - Safety razor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safety razor in which a plurality of blade edge guards 24 for covering a blade edge so as to cross the blade edge of a blade body does not float more than necessary owing to an error in production, or does not generate tensile force more than necessary.SOLUTION: A part extending in the front end direction of a plate front part 22 from a part covering a blade edge positioned on the forefront side, of a guard plate 4, is bent extendedly frontward by changing a direction in the middle, and the part extending frontward is fixed between a cap member 2 and a blade base 10.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a safety razor in which cutting edges are covered with a cutting edge guard at intervals.

Conventionally, there has been a safety razor in which the cutting edge is covered with a cutting edge guard at an interval. The safety razor described in Patent Document 1 has a guard member (guard plate) on which a blade edge guard is formed, the rear portion of the guard member is fixed to the cap member and the blade base in a horizontal state, and the front portion of the guard member is , Extending downward substantially perpendicular to the blade body, and sandwiched between the front end walls of the cap member and the blade base. Furthermore, the engagement hole formed in the blade edge guard is engaged with a protruding engagement piece formed in the front end wall of the cap member, thereby resisting external force such as tensile force applied to the mounted guard member. Thus, the guard member can be securely held. And there are three places of engagement between the engagement holes and the protruding engagement pieces. Thus, the front part of the guard member is firmly sandwiched between the front end walls of the cap member and the blade base, and is further engaged by the protruding engagement pieces at the three engagement points. It is firmly fixed. Thus, the reason why the front part of the guard member is firmly fixed is that the front part of the guard member draws a natural curve extending forward from the center part of the guard member, and from there, as described above, against the blade body This is because it extends substantially vertically downward. That is, an external force such as a tensile force applied to the guard member acts on the front portion of the guard member in a direction parallel to the surface thereof. That is, an external force such as a tensile force applied to the guard member is transmitted to the front portion of the guard member as it is, and there is no means for reducing it midway, so it is necessary to firmly fix it.

In addition, the assembly of the razor head of the safety razor described in Patent Document 1 is performed with the razor head turned upside down. That is, first, set the cap member in an inverted state, stack the inverted guard member on it, and then sequentially stack the inverted blade body and spacer, and finally press the blade base in an inverted state, The blade base and the cap member are joined in a pressure contact state. At that time, the guard member, which has been flat, is automatically bent so as to be compatible with other parts. Such an assembling method is a widely used method because it requires only a simple process of turning parts upside down.

  As a safety razor having a guard plate (guard plate) on which a blade edge guard is formed, a safety razor having a configuration different from that of Patent Document 1 is described in Patent Document 2. In the safety razor described in Patent Document 2, the blade member is a metal guard in which a metal upper blade body, a middle blade body, and a lower blade body are overlapped with each other via a spacer and folded in half. A plate wraps around the edge of the blade and covers the blade body, and these components are fixed together. That is, the blade body, the spacer, and the guard plate are unitized as a blade body member. Therefore, when assembling the razor head, it is necessary to assemble the blade member that has been unitized in advance in a separate process, which is different from the simple assembly method of the safety razor in Patent Document 1. Can be said to be inferior in simplicity. Therefore, a method of stacking and assembling together with other parts for each part without consolidating the blade member is also considered. However, since the guard plate of the safety razor is folded in half, it cannot be folded in half automatically even if the flat guard plate is stacked and pressed together with other parts. Therefore, after the guard plate is overlaid on the cap member that is turned over, and the blade body and the spacer are further overlaid, the guard plate is folded in half, and in this case, the process is not simplified. . Furthermore, in order to fold the guard plate in half, it is necessary to press with a strong force, and it is difficult to fold the guard plate in a folded manner so that the guard plate is folded in a state where the parts are overlapped. Therefore, the safety razor described in Patent Document 2 is to be performed only by a simple process of assembling the razor head with all the parts turned upside down and joining the blade base and the cap member in a pressure contact state. It is not possible.

Japanese Patent No. 3275092 Japanese Patent No. 3165684

  The present invention provides a safety razor in which a plurality of cutting edge guards that cover the cutting edge so as to cross the cutting edge of the blade body do not float more than necessary or cause excessive tensile force due to errors during manufacturing. Is intended to provide.

In the first aspect of the invention, the portion of the guard plate that extends in the front end direction of the front portion of the plate from the portion that covers the cutting edge located on the most front side is bent so as to extend forward in the middle of the portion. The forwardly extending portion is fixed between the cap member and the blade base.

In the invention according to claim 2, the part where the guard plate is bent so as to change its direction in the middle and to extend forward is in the front part of the plate of the guard plate and extends forward. The forward portion of the front portion of the plate is configured to be fixed between the cap member and the blade base.

The invention according to claim 3 is a configuration in which a hole is formed in a forwardly extending portion of the guard plate, and a protrusion formed on either the cap member or the blade base is inserted into the hole. is there.

In the invention according to claim 4, the hole is formed in the forward-facing portion of the front portion of the plate, and from the forward-facing portion of the front portion of the plate to the position including the portion where the front portion of the plate is bent behind it. It is the structure extended.

The invention according to claim 5 is a configuration in which the hole is formed in the forward-facing portion of the front portion of the plate and is located on the extension of the blade edge guard.

The invention according to claim 6 is a configuration in which the forward facing portion of the guard plate is substantially parallel to the blade body.

According to the seventh aspect of the present invention, the portion of the front portion of the plate fixed between the cap member and the blade base is at least the vertical direction of the front and rear direction, the longitudinal direction, and the vertical direction between the cap member and the blade base. The structure is fixed with play.

According to an eighth aspect of the present invention, the plate front portion includes a plurality of fixing protrusions formed at intervals in the longitudinal direction of the guard plate, and each fixing protrusion extends in the direction of the front end direction. It is the structure which is bent so that it may change and it may be extended forward, and the front part which is the part extended forward is fixed between the cap member and the blade base.

In the first aspect of the invention, the portion of the guard plate that extends in the front end direction of the front portion of the plate from the portion that covers the cutting edge located on the most front side is bent so as to extend forward in the middle of the portion. The forwardly extending portion is fixed between the cap member and the blade base. On the other hand, the guard plate described in Patent Document 1 has a substantially central portion covering the cutting edge, a front portion of the covered portion is bent downward, and finally the front portion of the plate is substantially It extends vertically downward and does not change its direction forward in the middle unlike the present invention. That is, an external force such as a tensile force applied to the guard member acts on the front portion of the guard member in a direction parallel to the surface thereof. For this reason, as described above, an external force such as a tensile force applied to the guard member is transmitted to the front portion of the guard member as it is without being reduced with respect to the front portion of the guard member, and the applied external force is reduced halfway. There is no means. Therefore, it is necessary to firmly fix the front part of the guard member. In the present invention, even if an external force such as a tensile force applied to the guard plate is applied to the bent portion extending forward, the external force is only a part of the external force due to the bent portion. Since the tensile force is applied to the portion extending forward, external forces such as the tensile force applied to the portion extending forward are greatly reduced. Therefore, there is an effect that a configuration and a process for firmly fixing the front portion of the guard plate are not required. In particular, when a portion of the guard plate that extends substantially vertically downward is bent so as to extend horizontally forward in the middle, the bending angle becomes almost a right angle, so that the tensile force applied to the portion extending forward is applied. The degree of reduction of external force such as force becomes extremely large. Further, even if the portion extending downward of the guard plate does not extend vertically downward, but extends obliquely forward toward the lower side, the boundary with the portion extending forward is bent. Therefore, the external force is reduced almost similarly by the bent portion. Therefore, with this configuration, when the portion extending forward is fixed between the cap member and the blade base so as to lightly touch the cap member and the blade base, the shaving may be hindered. The guard plate can be fixed to the extent that there is no. In other words, if the portion of the guard plate that extends forward is sandwiched to the extent that the cap member and the blade base lightly touch each other, as described above, a part of the external force is pulled to the portion that extends forward. While acting as a force, the other component force of the external force acts as a force for pulling up the portion extending forward. If it does so, since the upper surface of the part extended frontward will press-contact with a cap member and a frictional force will be produced, it can prevent reliably that the bent part is pulled out between a cap member and a blade base. When sandwiching the part that extends forward in the pressure contact state as in the past, due to errors during manufacturing, the edge guard was lifted more than necessary, or an excessive tensile force was generated on the edge guard. There is a risk of being fixed in a state. On the other hand, since the present invention only needs to be fixed to the extent that it is lightly applied, even if there is an error that causes the blade edge guard to float more than necessary or cause an excessive tensile force, the elasticity of the guard plate Such errors can be corrected by partial displacement of the guard plate due to force or the like.

In the invention according to claim 2, the part where the guard plate is bent so as to change its direction in the middle and to extend forward is in the front part of the plate of the guard plate and extends forward. A forward facing portion of the front portion of the plate is fixed between the cap member and the blade base. If the edge guard has a portion that is bent to extend forward in the middle of the guard plate, the edge guard has a very narrow width. If it is bent at a right angle, the bent part may be broken. Since the front part of the plate is wider than the edge guard, there is no possibility that the bent part will be broken.

  According to a third aspect of the present invention, a hole is formed in a portion of the guard plate extending forward, and a protrusion formed on either the cap member or the blade base is inserted into the hole. Such a configuration functions, for example, when the blade guard is accidentally pulled. For example, the protrusion functions effectively when the blade edge guard is pulled by being caught by a small protrusion of another object. Further, since the protrusion is inserted into the hole formed in the forwardly extending portion of the guard plate, the protrusion protrudes in the vertical direction with respect to the forwardly extending portion. Therefore, the protrusion does not protrude laterally from the cap member or the blade rest on which it is formed. On the other hand, the engagement piece 17 of Patent Document 1 corresponding to the protrusion protrudes inward in the lateral direction on the component member A (cap member). As will be described later, this difference in configuration can reduce the span between the contact point of the tangent line extending from the blade edge of the lower blade to the upper surface of the skin contact portion and the blade edge of the lower blade. Safety razors cannot be made as small as the present invention.

  According to a fourth aspect of the present invention, the hole into which the protrusion is inserted is formed in the forward facing portion of the front portion of the plate, and the front portion of the plate behind the forward facing portion of the plate is bent. It extends to the position including the part which is. On the other hand, when the entire hole is on the front side of the bent portion of the plate front portion, there is a gap between the hole portion and the bent portion and the front end of the plate front portion. The gap between the holes cannot be made large. Therefore, when the hole is extended to a position including a portion where the front portion of the plate is bent, the interval is eliminated, so that the interval between the front end of the front portion of the plate and the hole portion can be widened. Therefore, since the space between the front edge of the front part of the plate and the hole has increased, the strength of that part has increased, so even if the edge guard is accidentally pulled, it can cope with it. can do. In addition, when the hole is configured to extend beyond the bent part, the hole will surely reach the bent part even if there is some error in the position of the bent part. It can be.

  In the invention described in claim 5, the hole is formed in the forward-facing portion of the front portion of the plate, and is located on the extension line of the blade edge guard. Since projections are inserted into the holes, the external force such as tensile force applied to the guard plate is distributed in a well-balanced manner by the edge guard through which the extension line passes through the hole. There is no risk of collapse.

In the invention according to claim 6, the forward facing portion of the guard plate is substantially parallel to the blade body. Accordingly, when the guard plate extending in the front end direction from the cutting edge located at the foremost side extends substantially vertically downward, the guard plate can be bent by making the forward facing portion of the guard plate substantially parallel to the blade body. The angle of the part is almost a right angle. Thereby, the degree of reduction of external force such as tensile force applied to the portion extending forward can be increased.

According to the seventh aspect of the present invention, the portion of the front portion of the plate fixed between the cap member and the blade base is at least the vertical direction of the front and rear direction, the longitudinal direction, and the vertical direction between the cap member and the blade base. It is fixed with play. As described above, when the part that extends forward is clamped in a pressure-contact state, the edge guard floats more than necessary due to manufacturing errors, or conversely, an excessive tensile force is generated on the edge guard. There is a risk of letting it go. On the other hand, when it is fixed with play in at least the vertical direction in the front-rear direction, the longitudinal direction, and the vertical direction, the edge guard floats more than necessary or generates an excessive tensile force. Even if there is such an error, such an error can be corrected by partial displacement of the guard plate due to the elastic force of the guard plate.

According to an eighth aspect of the present invention, the plate front portion includes a plurality of fixing protrusions formed at intervals in the longitudinal direction of the guard plate, and each fixing protrusion extends in the direction of the front end direction. Are bent so as to extend forward, and a forward-facing portion that is a forward-extending portion is fixed between the cap member and the blade base. Since the forward-facing portion fixed between the cap member and the blade base is subdivided in the form of a fixing protrusion, the contact surface between the cap member and the blade base is reduced, and the fixing protrusion moves. As a result, the above-described manufacturing error can be corrected quickly and reliably. Moreover, since the width of the fixing protrusion is smaller than the width of the guard plate, the length of the bent portion is shortened, and the occurrence of errors can be reduced during bending. Further, when the bent portion crosses the hole of the fixing protrusion, the length of the bent portion is further shortened, so that the bending is easy and the occurrence of errors can be further reduced.

It is an exploded perspective view of the present invention. It is a perspective view of a cap member. It is a perspective view of a blade stand. It is sectional drawing of this invention cut | disconnected by the line which passes along a processus | protrusion. It is a top view before the press of a guard plate. It is AA expanded sectional drawing after the press of the guard plate in FIG. It is a top view before the press of the other Example of a guard plate. It is a top view before the press of the other Example of a guard plate. It is a top view before the press of the other Example of a guard plate.

  Next, embodiments of the present invention will be described with reference to the drawings. As is clear from FIG. 4, the present embodiment relates to a replaceable blade cartridge 1 of a safety razor to which a replaceable blade cartridge can be mounted in a replaceable manner, but a razor head having a blade body is mounted integrally with a handle. Of course, it may be a safety razor. FIG. 1 is an exploded view of a replaceable blade cartridge 1, and each component includes, from below, a cap member 2, a bar-shaped shaving aid 3, a guard plate 4 pressed into a predetermined shape, an upper blade 5, The upper spacer 6, the middle blade 7, the lower spacer 8, the lower blade 9, and the blade base 10 are arranged in this order. The number of blades is three, but is not limited to this, and may be one or two, or more than three. When assembling the replaceable blade cartridge 1 by assembling these components, the bar-shaped shaving aid 3, the guard plate 4 pressed into a predetermined shape, the upper blade 5, and the upper spacer 6 are placed on the cap member 2 turned upside down. Then, after the intermediate blade 7, the lower spacer 8, the lower blade 9, and the blade base 10 are stacked in this order, the cap member 2 and the blade base 10 are combined.

The cap member 2 is integrally formed of synthetic resin. An elongated storage portion 12 for mounting the shaving aid 3 extends in the longitudinal direction along the rear end portion 11 of the cap member 2. Receiving grooves 13 and 13 for receiving both ends of the shaving aid 3 are formed at both ends of the storage portion 12, and as shown in FIG. 2, between the receiving grooves 13 and 13 of the storage portion 12. In this part, an opening 14 is formed. The shaving aid 3 is exposed from the opening 14 to provide a lubricating action during shaving.

Four caulking pins 15 are formed in a line in the longitudinal direction in the vicinity of the storage portion 12. In this specification, the longitudinal direction refers to the longitudinal direction of the replaceable blade cartridge in which the components shown in FIG. 1 are assembled, and the front-rear direction refers to a direction orthogonal to the longitudinal direction. A skin contact portion 16 extending in the longitudinal direction is formed at the front end portion of the cap member 2. Two small caulking pins 17 are formed in the skin contact portion 16, and two shallow recesses 18 are formed next to them. Further, a protrusion 19 is formed in each of the recesses 18.

The guard plate 4 is made of metal. However, the material is not limited to this, and any material that can function as the guard plate 4 may be used. For example, a synthetic resin may be used. The guard plate 4 shown in FIG. 1 is pressed into a predetermined shape, but is initially flat as shown in FIG. 5 and has a constant thickness of about 0.05 mm. Further, the maximum length in the longitudinal direction of the guard plate 4 is about 27.6 mm, and the maximum length in the front-rear direction is about 11.7 mm. The length of the plate rear portion 23 is about 24.6 mm. The length in the longitudinal direction of the punch hole 25 is about 2.9 mm, and the length in the front-rear direction is about 4.4 mm. The guard plate 4 includes a plate front portion 22, a plate rear portion 23, and ten blade edge guards 24 formed therebetween. The number of cutting edge guards 24 is not limited to ten. The blade edge guard 24 is formed by removing nine punch holes 25 in the guard plate 4. By changing the width of the punch hole 25, the number of the edge guards 24 can be changed. The blade edge guard 24 is formed with a narrow width, and the width is about 0.15 mm, but is not limited to this value. The plate front portion 22 includes a base portion 26 that is elongated in the longitudinal direction along the punching hole 25, and two fixing protrusions 27 that extend forward from the base portion 26. The plate rear part 23 is formed with two insertion holes 28 for inserting the two inner caulking pins 15 of the four caulking pins 15 of the cap member 2. The two outer caulking pins 15 pass outside the both ends of the plate rear portion 23.

As shown in FIG. 6, the flat guard plate 4 has folding lines 20 and 21 formed by pressing. In FIG. 6, the part where the guard plate 4 is bent so as to change its direction in the middle and extend forward is a horizontal part on the front side (left side in FIG. 6) with respect to the folding line 21. Further, the horizontal portion in front of the fold line 21 is a part of the plate front portion 22, and this corresponds to the forward portion of the plate front portion 22. The radius of the bent portion of the fold lines 20 and 21 is about 0.3 mm, but is not limited to this value.

A hole 29 is formed in each of the two fixing protrusions 27 described above. The bend line 21 passes through the hole 29 and the hole 29 is divided into a front hole 30 and a rear hole 31 with the bend line 21 as a boundary. Similarly, the fixing protrusion 27 is also divided into a front protrusion 32 and a rear protrusion 33 by the fold line 21. As shown in FIG. 6, the front protrusion 32 and the front hole 30 bent forward are both substantially horizontal, and the rear protrusion 33 and the rear hole 31 are both substantially vertical. Therefore, the angle formed by the front projecting piece 32 and the rear projecting piece 33 is substantially a right angle. Even if the angle formed by the front protrusion 32 and the rear protrusion 33 is greater than a right angle, the bent portion is effective if the angle is not so large that the effects of the present invention cannot be exhibited. This can reduce the tensile force. That is, the angle of the bent portion may be in the range from 90 degrees to 130 degrees in addition to 90 degrees, for example, in the range from 90 degrees to 110 degrees, even in the range from 90 degrees to 100 degrees. Or in the range of 90 to 120 degrees. In that case, the rear protrusion 33 may not be vertical but may be inclined according to the angle of the bent portion. Further, the angle of the bent portion may be smaller than 90 degrees.

As described above, the components of the replaceable blade cartridge 1 are assembled by sequentially stacking the components on the cap member 2 turned upside down. First, the shaving aid 3 is stored in the storage portion 12 for storing the shaving aid 3 in the cap member 2. Next, the guard plate 4 is overlaid from above. The plate rear portion 23 of the guard plate 4 covers the stored shaving aid 3 to prevent the shaving aid 3 from rattling in the storage portion 12.

When the guard plate 4 is overlaid on the cap member 2, the insertion hole 34 of the upper blade 5, the insertion hole 35 of the upper spacer 6, the insertion hole 36 of the middle blade 7, the insertion hole 37 of the lower spacer 8, and the lower blade 9. The caulking pin 15 of the cap member 2 is inserted through the insertion hole 38 and the insertion hole 39 of the blade base 10. At the same time, the small caulking pin 17 is inserted into the small insertion hole 40 of the blade base 10. Since both the caulking pin 15 and the tip end portion of the small caulking pin 17 come out of the insertion hole 39 and the small insertion hole 40 of the blade base 10, the replaceable blade cartridge 1 is crimped by pressing, welding, or the like. Are assembled.

As shown in FIG. 4, when the replaceable blade cartridge 1 is assembled, the front projecting piece 32 is stored in the recess 18 of the cap member 2. At that time, the protrusion 19 is inserted into the front hole 30, and the tip of the protrusion 19 reaches the recess 41 also described in FIG. 3. FIG. 4 shows a state in which the tip of the protrusion 19 has reached the recess 41. The upper surface 43 of the front portion 44 of the blade base 2 covers the recess 18. Thereby, the range of play in the vertical direction of the front protrusion 32 is determined. 4 is a cross-sectional view taken along the line AA when the guard plate 4 shown in FIG. 5 is assembled to the replaceable blade cartridge 1. As described above, since the thickness of the guard plate 4 is constant and about 0.05 mm, the thickness of the front protrusion 32 is also about 0.05 mm. On the other hand, the depth of the recess 18 in which the front projecting piece 32 is accommodated is about 0.10 mm. Therefore, as shown in FIG. 4, the front protrusion 32 has a play of about 0.05 mm in the thickness direction in the recess 18. Moreover, the length of the longitudinal direction of the recess 18 is about 5.5 mm, and the length of the longitudinal direction of the front side protrusion 32 accommodated in it is about 4.5 mm. Therefore, the front projecting piece 32 has play in the length direction in the recess 18. Further, the length in the longitudinal direction and the length in the front-rear direction of the protrusion 19 are formed shorter than the length in the longitudinal direction and the length in the front-rear direction of the front hole 30 into which the protrusion 19 is inserted, respectively. Therefore, since the protrusion 19 has play in the front hole portion 30, the front protrusion 32 is not completely fixed by the protrusion 19, but is fixed with play. Further, as shown in FIG. 4, the front surface of the base portion 26 extending vertically between the fold lines 20 and 21 of the guard plate 4 is in light contact with the rear surface 42 of the skin contact portion 16 of the cap member 2. The rear surface of 26 is not in contact with any part. Accordingly, since the frictional force generated only between the rear surface 42 of the skin contact portion 16 and the front surface of the base portion 26 is very small, it can be easily moved with respect to the rear surface 42 of the skin contact portion 16. As described above, the front projecting piece 32 can be easily moved in the recess 18 by the above-described play and light contact. Therefore, even if an error occurs in the attachment of the guard plate 4, the movement of the front projecting piece 32 The plate front portion 22 and the blade edge guard 24 are displaced to appropriate positions, and the error can be automatically corrected.

As described above, the protrusion 19 is formed in the recess 18. Then, when the replaceable blade cartridge 1 is assembled, the protrusion 19 is inserted into the front hole 30, and the tip of the protrusion 19 reaches the recess 41 also illustrated in FIG. 3. As is clear from this, the protrusion 19 protrudes vertically from the recess 18 and does not protrude laterally. Accordingly, when the lower blade 9 is assembled, no protrusion protrudes from the rear surface 42 of the skin contact portion 16, so that the blade edge 45 of the lower blade 9 can be assembled close to the rear surface 42. As a result, as shown in FIG. 4, the span between the contact point 46 of the tangent line 47 drawn from the cutting edge 45 of the lower blade 9 to the upper surface of the skin contact portion 16 and the cutting edge 45 of the lower blade 9 can be reduced. It can be done. On the other hand, the engagement piece 17 described in Patent Document 1 corresponding to the protrusion 19 protrudes in the inner lateral direction. In addition, when the height of the engagement piece 17 is not sufficient, the engagement portion may be detached during the assembly, so that a certain height is required. Therefore, when the lower blade is piled up during assembly, the blade edge of the lower blade may hit the engagement piece 17, so the distance between the front end wall 12 and the blade edge of the lower blade is the same as the height of the engagement piece 17. It needs to be bigger. Then, the span between the contact point of the tangent drawn from the cutting edge of the lower blade to the skin contact portion on the upper surface of the front end wall 12 and the cutting edge of the lower blade is increased. Further, when the span is large, the skin is pushed in a convex mountain shape between the spans during shaving, so that the function of the skin contact portion is weakened. On the other hand, in the present invention, since there is no protrusion protruding in the lateral direction like the engagement piece 17, the span can be reduced, and the skin between the spans has a shape close to a plane, and the skin contact The work of the department is fully demonstrated.

  The sizes of the component parts of the present embodiment are as described above, but when further added, the total length of the replaceable blade cartridge 1 in the longitudinal direction is about 40.0 mm, and the length in the front-rear direction is about 11.5 mm. The maximum thickness is about 5.8 mm. Although the size is as described above, it is needless to say that the present invention is not limited to these numerical values.

In addition, this invention can take a various aspect based on the structure mentioned above. For example, the hole 29 of the guard plate 4 extends rearward beyond the portion where the plate front portion 22 is bent in the present embodiment, but in the present invention, the hole 29 is also bent. Also included are configurations that extend to part but do not exceed the bent part, or that do not reach the bent part. Further, in this embodiment, the fixing protrusion 27 is bent in the middle thereof, but the present invention is not limited to this, and the fixing protrusion 27 is bent at the base portion 26 of the fixing protrusion 27. The whole may constitute the forward facing portion of the plate front portion 22. Further, the hole 29 for inserting the protrusion 19 may not be formed in all the fixing protrusions 27 but may be formed in only one fixing protrusion 27, for example. Further, FIGS. 7 to 9 show another embodiment of the guard plate 4. The embodiment of FIG. 7 has a configuration in which the hole 29 is not formed in the fixing protrusion 27. In the embodiment of FIG. 8, the plate front portion 22 does not have a plurality of fixing protrusions 27, and a hole 29 is formed directly in the plate front portion 22. The embodiment of FIG. 9 has a configuration that does not have the hole 29 of the embodiment of FIG. In the present invention, these guard plates 4 may be used.

  Even if there is an error that causes the edge guard to float more than necessary or cause an excessive tensile force during manufacturing, such an error may occur due to partial displacement of the guard plate due to the elastic force of the guard plate. Can be corrected.

DESCRIPTION OF SYMBOLS 1 Replacement blade cartridge, 2 Cap member, 3 Shaving aid, 4 Guard plate, 5 Upper blade, 6 Upper spacer, 7 Middle blade, 8 Lower spacer, 9 Lower blade, 10 Blade stand, 11 Rear end part of cap member, 12 Storage part, 13 receiving groove, 14 opening, 15 crimping pin, 16 skin contact part, 17 small crimping pin, 18 recess, 19 projection, 20 folding line, 21 folding line, 22 plate front part, 23 plate rear part, 24 cutting edge Guard, 25 punch hole, 26 base, 27 fixing protrusion, 28 insertion hole, 29 hole, 30 front hole, 31 back hole, 32 front protrusion, 33 back protrusion, 34 insertion hole, 35 Insertion hole, 36 Insertion hole, 37 Insertion Hole, 38 through hole, 39 through hole, 40 a small insertion hole 41 recess 42 rear face of the skin contact portion, 43 blade base of the front portion of the top surface, 44 blade base front of the

Claims (8)

A cap member and a blade base, and at least one blade body and a guard plate formed of a thin plate mounted between the cap member and the blade base, the guard plate crossing the blade edge of the blade body The blade edge guard is a safety razor formed between the plate front portion and the plate rear portion of the guard plate, and the plate front portion and the plate rear portion are fixed to each other. The portion of the guard plate that extends from the portion of the guard plate that covers the cutting edge located at the foremost side toward the front end of the front portion of the plate is bent in such a way as to change the direction and extend forward. A safety razor characterized in that a portion extending to the cap is fixed between the cap member and the blade base. The part where the guard plate is bent so as to change its direction in the middle and extend forward is in the front part of the plate of the guard plate, and the forward part of the front part of the plate, which is the part extending forward, The safety razor according to claim 1, wherein the safety razor is fixed between the cap member and the blade base. 3. The safety according to claim 1, wherein a hole is formed in a portion of the guard plate that extends forward, and a protrusion formed on either the cap member or the blade base is inserted into the hole. Razor. 4. The hole is formed in a forward portion of the front portion of the plate, and extends from the forward portion of the front portion of the plate to a position including a portion where the front portion of the plate is bent behind it. Safety razor. The safety razor according to claim 3 or 4, wherein the hole is formed in a forward-facing portion of the front portion of the plate and is located on an extension line of the blade edge guard. The safety razor according to any one of claims 1 to 5, wherein the forward-facing portion of the guard plate is substantially parallel to the blade body. A portion of the front portion of the plate fixed between the cap member and the blade base is fixed between the cap member and the blade base with play in at least the vertical direction among the front-rear direction, the longitudinal direction, and the vertical direction. The safety razor according to any one of claims 3 to 6. The plate front portion includes a plurality of fixing protrusions formed at intervals in the longitudinal direction of the guard plate, and each fixing protrusion changes its direction in the middle of extending in the front end direction and extends forward. The safety razor according to any one of claims 2 to 7, wherein a forward-facing portion that is bent and extends forward is fixed between the cap member and the blade base.

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