JP4766541B2 - Electric razor - Google Patents

Description

  The present invention includes a fixed outer blade that is formed in an inverted U-shaped cross section including an upper wall and left and right laterally long front and rear walls, and a movable inner blade that is reciprocated in the left-right direction within the fixed outer blade. Related to razor.

  In the electric razor according to the present invention, a large number of teeth are directed in the front-rear direction from each of the front and rear edges of the upper wall of the fixed outer blade for the purpose of reliably drawing long hairs and comb hairs into the cutting region of the movable inner blade. The shape of the fixed inner blade having a plurality of teeth on the upper wall is described in Patent Document 1 and is well known. There, a large number of straight teeth are extended from the front and rear edges of the upper wall in the front-rear horizontal direction.

  The form of the fixed outer blade of Patent Document 1 will be described in detail with reference to FIG. FIG. 13 is a plan view of the fixed outer blade according to FIG. The fixed outer blade 100 is composed of horizontally long front and rear walls 101 and 102 and an upper wall 103 that runs in the left and right direction. The front and rear walls 101 and 102 and the upper wall 103 are upper end portions of the front and rear walls 101 and 102. Are connected via support legs 104 protruding upward at a predetermined interval. The front and rear edges of the upper wall 103 are provided with comb teeth 106 composed of four teeth 105 that are formed so as to be cantilevered outward in the front and rear direction, avoiding the formation of the support legs 104. ing. Between the adjacent support legs 104, an opening 107 is formed for drawing the long hairs and comb hairs captured by the teeth 105 into the cutting region of the movable inner blade.

Japanese Patent Publication No. 8-508434 (see FIGS. 1 to 6)

  In this way, when the comb teeth body 106 composed of a plurality of teeth 105 extending in the front-rear horizontal direction is provided at the front and rear edges of the upper end wall 103 of the fixed outer blade 100, the comb teeth body 106 has long hairs and wrinkles. Can be drawn into the cutting region of the movable inner blade through the opening 107, so that long hairs and comb hairs can be reliably cut as compared with the form of a net-like or slit-like stationary outer blade. Further, when the fixed outer blade 100 moves on the skin surface, each tooth 105 captures not only the hair lying flat against the skin but also the hair extending from the skin so as to get tangled, and cutting the movable inner blade Since it is drawn into the region, long hairs and comb hairs can be reliably cut even at this point. In addition, when a plurality of (four in the illustrated example) teeth 105 are continuously formed so as to avoid the formation of the support legs 104, the support legs 104 are as shown in FIGS. Since the size of the opening 107 can be made as large as possible compared to the form in which the teeth 105 and the teeth 105 are alternately arranged in parallel, the long hairs can be smoothly drawn into the cutting region of the movable inner blade and cut. Is excellent.

  However, as in Patent Document 1, in the form in which each tooth 105 is straight and extends straight in the horizontal direction, directivity cannot be given to the long hair and the comb hair captured by the tooth 105, and the long hair and the like. Since there are many opportunities to hit the support legs 104, they cannot be efficiently drawn into the cutting region of the movable inner blade. That is, when the long hair captured by the teeth 105 adjacent to the support leg 104 is directed to the opening 107, the long hair is directed toward the support leg 104, although it can be cut well with the movable inner blade. In this case, the support legs 104 prevent the movable inner blades such as long hairs from entering the cutting region, so that they cannot be cut. In addition, the bent portion such as the support leg 104 is difficult to obtain a desired flatness and has a small function as a cutting blade. For this reason, in the form of patent document 1 in which long hair etc. tends to face the said support leg 104, there also exists a disadvantage that long hair etc. cannot be cut | disconnected efficiently.

  However, when the interval dimension of the support legs 104 is increased, the opening dimension of the opening 107 can be substantially increased, so that the cutting caused by the long hair hitting the support legs 104 as described above. The occurrence of defects can be effectively suppressed. However, in this case, since the distance between the support legs 104 is increased, the connection structure between the front and rear walls 101 and 102 and the upper wall 103 is fragile, and it is inevitable that the fixed outer blade 100 is easily deformed. In the worst case, the fixed outer blade 15 may be damaged.

  The present invention has been made in order to solve such a problem, and the long hair and the comb hair captured by the teeth constituting the comb teeth body hit the support leg, so that the movable inner blade enters the cutting region. Can be reliably prevented, and thus long hairs and comb hairs can be cut efficiently, and it is not necessary to make a large space between the support legs, so there is a risk of deformation or breakage of the fixed outer blade. It is to provide an electric shaver with excellent reliability without any problems.

  As shown in FIGS. 1 to 12, the present invention includes a fixed outer blade 15 having an inverted U-shaped cross section including an upper wall 73 and left and right laterally long front and rear walls 70, 71, And a movable inner blade 16 that is reciprocated in the left-right direction. As shown in FIGS. 1, 7, 9, 10, and 11, a plurality of support legs 72 face upward at predetermined intervals at the upper ends of the front and rear walls 70 and 71 of the fixed outer blade 15. The front and rear walls 70 and 71 and the upper wall 73 are connected via the support legs 72. Between adjacent support legs 72, there is provided a comb tooth body 77 composed of a plurality of teeth 76a and 76b that are cantilevered from the front and rear edges of the upper wall 73 in the front-rear direction. In addition, an opening 78 is formed between adjacent support legs 72 for drawing the scissors captured by the teeth 76a and 76b into the cutting region of the movable inner blade 16. The present invention is characterized in that the tip or all of one or all of the teeth 76a adjacent to the support leg 72 are bent in the left and right diagonal directions so as to go in the direction in which the support leg 72 is formed. Have.

  1, 7, and 11 show a configuration in which the tips of all the teeth 76 a adjacent to the support leg 72 are bent, and FIG. 9 illustrates an entire portion of all the teeth 76 a adjacent to the support leg 72. Indicates a bent form. FIG. 10 shows a form in which the tips of some of the teeth 76a adjacent to the support leg 72 are bent. However, a configuration in which FIG. 9 and FIG. 10 are combined, that is, a configuration in which all of the partial teeth 76a adjacent to the support leg 72 are bent may be employed. Note that “the whole part of the tooth 76a is bent” means that, as shown in FIG. 9, the tooth 76a is moved in the direction in which the support leg 72 is formed from the root of the tooth 76a that is the base end protruding from the upper wall 73. It means that you are going.

  As shown in FIGS. 1, 7, 9, and 11, the teeth 76 a on the left and right ends constituting the comb tooth body 77 have the left and right facing distances from the upper wall 73. It is possible to take a form that is formed in an expanded shape so as to increase with increasing distance in the front-rear direction.

As shown in FIGS. 1, 7 and 9, the comb tooth body 77 is configured by three teeth 76 a and 76 b, and the teeth 76 a and 76 a at both ends in the left and right directions are mutually distal ends. Is formed so as to increase as the distance from the upper wall 73 increases, and the projecting dimension from the upper wall 73 of the tooth 76b located at the center in the left-right direction of the comb tooth body 77 is The form set smaller than that of the tooth 76a according to the portion can be taken.

  As shown in FIGS. 1, 7, 9, and 10, the teeth 76 a and 76 b formed on the front edge side of the upper wall 73 and the teeth 76 a and 76 b formed on the rear edge side of the upper wall 73 are It can take the form arrange | positioned in the state shifted | deviated.

  As shown in FIG. 1, the lower end part of the opening 78 can take the form formed in the downward dent curve shape as an opening for fluff discharge | emission.

  As shown in FIG. 7, it is desirable to set the width dimension (t1) of the support leg 72 in the left-right direction larger than the width dimension (t2) in the left-right direction of the teeth 76a and 76b.

  The fixed outer blade 15 is reverse U-shaped by plastically deforming the connecting portion between the upper wall 73 and the support leg 72 with respect to the sheet-like outer blade blank 80 formed by the etching method as shown in FIG. It can be formed into a shape.

  Between adjacent support legs 72, there is provided a comb tooth body 77 composed of a plurality of teeth 76a and 76b formed in a cantilevered manner from the front and rear edges of the upper wall 73 in the front-rear direction. And the comb teeth 77 can capture long hairs and comb hairs and draw them into the cutting region of the movable inner blade 16 through the opening 78. Can be cut reliably. Further, when the fixed outer blade 15 moves on the skin surface, the teeth 76a and 76b constituting the comb tooth body 77 have not only hair that is placed flat against the skin but also hair that extends from the skin so as to be tangled. Since it is captured and pulled into the cutting region of the movable inner blade 15, long hairs and comb hairs can be reliably cut even at this point. In addition, if a plurality of (two or three in the illustrated example) teeth 76a and 76b are continuously formed so as to avoid the place where the support leg 72 is formed, FIG. 3 and FIG. Thus, since the size of the opening 78 can be made as large as possible as compared with the form in which the support legs and the teeth are alternately arranged in parallel, the long hairs are smoothly drawn into the cutting region of the movable inner blade 16. be able to.

  In addition, as shown in FIGS. 1, 7, 9, 10, and 11, the tip portion or the entire portion of one or all of the teeth 76 a adjacent to the support leg 72 is directed in the forming direction of the support leg 72. If the teeth 105 (see FIG. 13) are bent in the diagonal direction on the left and right as shown in FIG. Since the capture area (see S1: FIG. 7 and FIG. 10) of the long hairs and comb hairs of the comb tooth body 77 defined by the opposing spacing dimension of the comb teeth body 77 can be increased, the probability that the long hairs or the like hit the support legs 72 is made as much as possible. Accordingly, the captured long hair or the like can be efficiently drawn into the cutting region of the movable inner blade 16 through the opening 78 provided in the lower portion of the comb tooth body 77 and cut. That is, the capture region (S1) such as long hairs of the comb teeth 77 can be enlarged by the amount of bending of the teeth 76a related to the left and right end portions in the diagonal direction left and right so as to go in the direction in which the support legs 72 are formed. Since the region (S2) reaching 72 can be made small, it is possible to effectively prevent the occurrence of cutting failure due to the penetration of the movable inner blade 16 into the cutting region due to the long hair or the like hitting the support leg 72. Can do.

  In addition, if the teeth 76a related to the left and right ends are bent in the left and right oblique directions so as to go in the forming direction of the support legs 72, the long hair captured by the tips of the teeth 76a when the electric razor is moved in the left and right directions Or the like can be drawn toward the capture region S1 along its opposing inner surface. That is, it is possible to give the captured long hair or the like directivity toward the capturing region S1. Accordingly, long hairs and the like can be efficiently cut at this point.

  In addition, if the long hair captured by the comb teeth 77 can be directed to the opening 78 as described above, the opening dimension in the left-right direction of the opening 78 is as small as possible. It ’s enough. In other words, it is not necessary to increase the distance between the support legs 72 for the purpose of increasing the size of the opening 78 in the left-right direction. Therefore, it is possible to obtain the fixed outer blade 15 having excellent strength in which the front and rear walls 70 and 71 and the upper wall 73 are firmly connected by the many support legs 72, and the deformation and breakage of the fixed outer blade 15 are effective. And can contribute to improving the reliability of electric razors.

  As shown in FIGS. 1, 7, 9, and 11, the above-described operation and effect are particularly effective when the teeth 76 a and 76 a on both ends in the left-right direction constituting the comb tooth body 77 are connected to each other at the distal ends. This is satisfactorily exerted when it is formed in an expanded shape in which the opposing spacing dimension in the left-right direction increases as it moves away from the upper wall in the front-rear direction. That is, when the teeth 76a and 76a at the left and right ends constituting the comb tooth body 77 are formed in an expanded shape, the comb tooth body is more bent than when a part of the teeth 76a is bent as shown in FIG. Since the capture area (S1) of 77 long hairs can be taken large, the occurrence of poor cutting due to the penetration of the movable inner blade 16 into the cutting area due to the long hairs hitting the support legs 72 Can be effectively suppressed.

  If the protruding dimension from the upper wall 73 of the tooth 76b located at the left and right central portion of the comb tooth body 77 is set smaller than that of the teeth 76a and 76a at both ends, the teeth 76a and Since the long hair captured by 76a hits the teeth 76b in the central portion and the occurrence of a problem that prevents the movable inner blade 16 from entering the cutting region can be reduced as much as possible, the long hair etc. Can be cut.

  As shown in FIG. 13 according to Patent Document 1, when the teeth 105 formed on the front and rear edges of the upper wall 103 are formed in a contrasting manner, the formation regions of the front and rear support legs 104 coincide with each other. Therefore, when the fixed outer blade 100 is moved in the front-rear direction, long hairs or the like existing in the formation region of the support leg 104 cannot be captured, and the cutting operation cannot be executed efficiently. That is, it is inevitable that a defective cut portion that cannot cut long hair or the like occurs. In this respect, as in the present invention, the teeth 76a and 76b formed on the front edge side of the upper wall 73 and the teeth 76a and 76b formed on the rear edge side of the upper wall 73 are asymmetrically shifted in the left-right direction. (See FIG. 7 and the like), the areas where the front and rear support legs 72 are formed do not coincide with each other. Therefore, there is no defective portion, and cutting work such as long hair can be performed efficiently.

  As shown in FIG. 1, when the lower end portion of the opening 78 is formed in a downwardly concave shape and the portion is used as an opening for discharging fuzz, an electric shaver is manufactured as compared with a mode in which an opening for discharging fuzz is separately provided. Increase in cost can be suppressed. The shape of the opening 78 is substantially obtained by making the base end protruding from the front and rear walls 70 and 71 of the support leg 72 into a flared shape that gradually becomes wider as the width dimension in the left-right direction goes downward. Therefore, the strength of the support leg 72 can be improved, and therefore the support leg 72 can be effectively prevented from being bent or deformed. Thereby, since the strength reduction of the stationary outer blade 15 due to the provision of the opening 78 can be suppressed, the strength can be made necessary and sufficient without increasing the thickness dimension of the stationary outer blade 15.

  If the width dimension (t1) of the support leg 72 is larger than the width dimension of the teeth 76a and 76b constituting the comb tooth body 77, the strength of the support leg 72 can be improved. It is possible to effectively prevent bending and deformation. Thereby, since the strength reduction of the stationary outer blade 15 due to the provision of the opening 78 can be suppressed, the strength can be made necessary and sufficient without increasing the thickness dimension of the stationary outer blade 15.

  The fixed outer blade 15 is formed in an inverted U shape by plastically deforming the connecting portion between the upper wall 73 and the support leg 72 with respect to the sheet-like outer blade blank 80 formed by etching as shown in FIG. As compared to the form in which the upper wall 73 and the support leg 72 are separately formed and both are welded and fixed, the increase in the number of parts is suppressed and the manufacturing cost of the electric shaver is reduced. Can contribute.

(First embodiment)
1 to 8 show a first embodiment of an electric shaver according to the present invention. In FIG. 2, the electric razor is composed of a main body case 1 and an operation unit assembled to the main body case 1. A switch panel 2 is provided on the front surface of the main body case 1, and a switch knob 3 for starting the motor and an indicator lamp 5 for displaying an operation state are provided above and below the switch panel 2. Although not shown in the figure, a kirizori blade unit is provided on the back side of the main body case 1.

  The operation unit includes a lower half electrical component unit and a razor head provided on the upper part. The electrical component unit is configured by assembling a circuit board, a secondary battery 6, a motor 7, and the like into a plastic molded electrical component holder. On the circuit board, a switch that is switched by the previous switch knob 3, a battery component that constitutes a control circuit, an LED, and the like are mounted. The electrical component unit is accommodated in the main body case 1 and sealed.

  As shown in FIG. 3, the razor head is provided with a pair of front and rear main blades 9, 9, a center blade 10 disposed between the pair of main blades 9, 9 and a drive mechanism for driving them. . The main blade 9 is composed of outer blade cassettes 12 and 12 that are swingably supported by the outer blade holder 11, and inner blade units 13 and 13 that reciprocally slide in contact with the outer blade cassettes 12 and 12. The center blade 10 includes a fixed outer blade 15 and a movable inner blade 16 that is reciprocated in the left-right direction within the fixed outer blade 15.

  As shown in FIG. 4, the outer blade holder 11 includes a pair of front and rear outer blade cassettes 12 and 12, an upper case 17 that supports the center blade 10, and a lower case 19 that supports the upper case 17. The lower case 19 is formed of a plastic product having a rectangular frame shape whose upper and lower surfaces are open. The lower case 19 is externally fitted to the head case 20 of the razor head, and is engaged and captured by lock claws 21 incorporated in the left and right side ends of the head case 20. Is done.

  For this purpose, engagement recesses 22 that engage with the lock claws 21 are formed in the front and rear surfaces of the left and right side walls of the lower case 19. The lock claw 21 is formed integrally with the lock release button 23 and is urged to move in a direction to engage with the concave portion 22 by a compression coil spring 24 shown in FIG. When the lock release button 23 is pushed against the spring 24, the lock claw 21 comes out of the engaging recess 22, so that the lower case 19 can be removed from the razor head. A pair of front and rear engaging projections 25 for engaging and capturing the upper case 18 are formed on the inner surfaces of the left and right side walls of the lower case 19, and the upper case 17 is positioned front and rear in the front and rear center of the left and right side walls facing the upper surface opening. Guide ribs 26 are formed.

  The upper case 17 is integrally formed with a rectangular frame-shaped main case body 27 whose upper and lower surfaces are open and a reinforcing frame 28 that is provided in parallel with the front and rear walls 27a of the main case body 27 and connects the lower portions of the left and right side walls 27b. It consists of a plastic molded product. A longitudinal groove 29 that engages with the previous guide rib 26 is formed on the outer surface of the left and right side walls 27b of the main case body 27, and an engagement recess 30 that engages with the previous engagement protrusion 25 is formed in the front and back of the lower end thereof. It is.

  The front and rear outer blade cassettes 12 are supported by the upper case 17 so as to be slidable up and down. For this purpose, a pair of left and right guide walls 32 project from the center of the inner surface of the front and rear walls 27 a of the main case body 27, and guide protrusions 33 are provided at the front and rear surfaces of the left and right side walls 27 b of the main case body 27. A regulation wall 35 that regulates the upward movement of the outer blade cassette 13 is formed on the inner surface of the guide wall 32. A groove 34 is formed between the front and rear guide protrusions 33 to guide and support the center blade 10 so as to be slidable up and down.

  The outer blade cassette 12 includes an outer blade 36 made of a sheet-like mesh blade formed by an etching method or an electroforming method, and an outer blade frame 37 that holds the outer blade 36 in an arch shape. The outer blade frame 37 is made of a plastic molded product in which front and rear walls 37a and arch-shaped left and right side walls 37b are integrally formed, and a vertically long slide groove 38 that is guided and supported by the guide protrusion 33 is formed through the left and right side walls 37b. To do. A slide protrusion 39 that is guided and supported by the previous guide wall 32 is formed on one side of the front and rear walls 37a so as to protrude in the front-rear direction. It is formed by penetration. The engagement groove 40 is formed in the shape of a long hole that is long on the left and right, and is formed at two locations near the left and right of the front and rear walls 37a.

  In order to float and support the front and rear outer blade cassettes 12 mounted on the upper case 17, a pair of left and right elastic bodies 42 are integrally formed on the front and rear surfaces of the reinforcing frame 28. As shown in FIG. 5, a through-hole 45 for a drive shaft 43 that drives the movable inner blade 16 of the center blade 10 is formed in a vertically penetrating manner at the center of the left and right sides of the reinforcing frame 28. A spring seat 46 is formed in a recess. The spring seat 46 is provided to receive the lower end of a spring 55 for the center blade 10 described later.

  In FIG. 4, the inner blade unit 13 includes an inner blade 47 formed of a slit blade and an inner blade frame 48 that supports the inner blade 47. The inner blade 47 is formed by etching and press-molding a sheet-shaped inner blade blank, and is different from the outer blade 36 in that it can self-hold a horseshoe-shaped cross-sectional shape. As shown in FIG. 3, a passive piece 51 that is engaged and connected to the drive shaft 50 of the vibrator 49 is integrally provided at the center lower portion of the inner blade frame 48, and between the drive shaft 50 and the passive piece 51. The entire inner blade unit 13 is urged upward by a compression coil spring 52 interposed therebetween. The tension of the spring 52 is set to be sufficiently larger than the elastic force of the previous elastic body 42. Therefore, the entire inner blade unit 13 can always be in close contact with the outer blade 36 even though it is supported by the drive shaft 50 so as to be movable up and down and tilted left and right.

  The vibrator 49 converts the rotational power of the motor 7 into a reciprocating motion and transmits it to the inner blade unit 13 via the drive shaft 50. At the same time, the movable inner blade 16 of the center blade 10 is reciprocally driven by the drive shaft 43 provided separately. To do. As shown in FIG. 3, these two drive shafts 50 and 43 are connected via a connecting arm 49a, and reciprocally vibrate in response to the reciprocating motion of the vibrator 49. As shown in FIGS. 4 and 5, between the movable inner blade 16 and the reinforcing frame 28, a pair of left and right compression coil springs 53 that push up and bias the movable inner blade 16 are arranged. The vibrator 49 can transmit the reciprocating power to the saw blade unit by pushing up the slide knob of the saw blade from the standby position.

  As shown in FIGS. 3 to 6, the center blade 10 includes a fixed outer blade 15 having an inverted U-shaped cross section, a movable inner blade 16 having an inverted U-shaped cross section disposed on the inner surface of the fixed outer blade 15, and movable. A connecting piece 55 that supports the lower surface of the center of the inner blade 16 and is engaged and connected to the drive shaft 43 of the vibrator 49, and attachment pieces 56 that are welded and fixed to the left and right ends of the fixed outer blade 15. It is configured as a unit part.

  The movable inner blade 16 is formed by etching a blade blank punched and formed by pressing to form a slit 57 and a cutting blade 59, and then plastically deforming the blade blank into an inverted U shape. On the shearing surface of the obtained movable inner blade 16, inverted U-shaped slits 57 and cutting blades 59 formed on the periphery of the slits 57 are alternately formed. A mounting portion 60 for mounting is integrally formed.

  As shown in FIG. 6, the connecting piece 55 is inserted into the central inner surface of the movable inner blade 16, and a horizontally long square columnar base 61 that receives the front and rear walls of the movable inner blade 16, and the drive shaft of the vibrator 49. 50, a pair of left and right elastic engagement pieces 62 that are integrally formed with each other, and a pair of left and right spring seats 63 that are fitted and fitted to the springs 53 on the lower surfaces of both ends of the base 61 downward. Projected.

  The mounting piece 56 is a plastic molding in which guide pieces 66 for the movable inner blade 16 project from the upper inner corner of the L-shaped base 65 and elastic engagement pieces 67 are integrally provided at the left and right outer ends of the base 65. It consists of goods. A total of four welding pins 68 project from the front and rear surfaces of the left and right inner ends of the base portion 65 and the front and rear surfaces of the L-shaped corner portion. Then, after incorporating the movable inner blade 16 integrated with the connecting piece 55 into the fixed outer blade 15, the base portions 65 of the mounting pieces 56 are inserted into the left and right ends of the fixed outer blade 15, and the previous welding pin 68 is fixed outside. Engaging with welding holes 69 provided on the front and rear surfaces of the blade 15 and heating the tip of the pin 68 to expand and deform the diameter, the mounting piece 56 is integrated with the fixed outer blade 15, and the center blade 10 is unitized. It is said.

  As shown in FIGS. 1 and 6, the fixed outer blade 15 includes a plurality of left and right horizontally long front and rear walls 70 and 71 and a plurality of protrusions projecting upward from the front and rear walls 70 and 71 at predetermined intervals. A support leg 72 and an upper wall 73 connected by the support leg 72 are included. Mounting claws 75 for mounting the mounting piece 56 are integrally formed on both sides of the lower surfaces of the front and rear walls 70 and 71, respectively.

  As shown in FIGS. 1 and 7, a plurality of teeth 76 a... Are used between adjacent support legs 72 in order to capture long hairs and comb hairs and draw them into the cutting area of the movable inner blade 16. A comb tooth body 77 constituted by 76 b is formed integrally with the upper wall 73. The teeth 76a and 76b constituting the comb tooth body 77 are formed so as to be cantilevered from the front and rear edges of the upper wall 73 in the front-rear direction. Here, the comb tooth body 77 is composed of a total of three teeth, two left and right teeth 76a and 76a adjacent to the support leg 72 and one tooth 76b provided therebetween. As shown in FIG. 3, each of the teeth 76a and 76b is formed so as to be slightly inclined obliquely downward by an angle θ with respect to the horizontal direction.

  Between the adjacent support legs 72, a U-shaped opening 78 having a lower recess is formed. The purpose of the opening 78 is to draw first long hair or the like captured by the comb tooth body 77 into the cutting region of the movable inner blade 16 and secondly to discharge the sawdust. That is, long hairs and the like captured by the teeth 76 a and 76 b constituting the comb tooth body 77 are drawn into the cutting region of the movable inner blade 16 through the upper end portion of the opening 78 and cut. Further, the lower end edge of the opening 78 exists below the lower end edge of the slit 57 of the movable inner blade 16, so that the debris adhering to the movable inner blade 16 passes from the lower end of the opening 78 into the upper case 17. To be discharged. The U-shape of the lower recess of the opening 78 is substantially a skirt-like shape in which the proximal end of the support leg 72 protruding from the front and rear walls 70 and 71 gradually becomes wider as the width dimension in the left-right direction goes downward. Can be obtained.

  In addition, in the present invention, attention is paid to the fact that the distal end portion of the tooth 76a adjacent to the support leg 72 is bent in the left and right diagonal directions so as to be directed to the corresponding support leg formation direction. Here, the teeth 76a related to the left and right end portions constituting all the comb teeth 77 are expanded so that the opposing distance dimension in the left and right direction at each tip end portion increases as the distance from the upper wall 73 increases in the front-rear direction. Formed into a shape. The projecting dimension of the teeth 76b located at the center of each comb tooth body 77 is smaller than that of the teeth 76a according to both ends.

  As shown in FIG. 7, the comb teeth 77 formed on the front and rear edges of the upper wall 73 are asymmetric. That is, the teeth 76a and 76b formed on the front edge side of the upper wall 73 and the teeth 76a and 76b formed on the rear edge side of the upper wall 73 are arranged in a state of being displaced in the left-right direction. The width (t1) dimension in the left-right direction of the support leg 72 was set larger than that (t2) of the teeth 76a and 76b.

  As shown in FIG. 8, the fixed outer blade 15 as described above is formed by etching a blade blank 80 made of a quenched stainless steel plate material, so that the outer periphery (outline), the upper wall 73, the opening 78, the support leg 72, and the comb teeth are etched. After forming the body 77, the blade blank 80 is plastically deformed in the middle of the support leg 72, and then the teeth 76a and 76b constituting each comb tooth body 77 are plastically deformed obliquely downward as shown in FIG. It is formed by. Supporting legs 72 and comb teeth 77 are alternately formed on the upper wall 73 of the obtained fixed outer blade 15, and a mounting claw 75 for mounting the mounting piece 56 is integrally formed at the lower end thereof. The In FIG. 8, two lines running in the left-right direction indicate the bending positions of the support legs 72.

  According to the center blade 10 provided with the fixed outer blade 15 as described above, long hairs and comb hairs can be captured by the comb teeth 77, and they can be drawn into the cutting region of the movable inner blade 16 through the opening 78. Compared to the net-like or slit-like outer blade form, long hairs and comb hairs can be cut reliably. Further, when the fixed outer blade 15 moves on the skin surface, the teeth 76a and 76b constituting the comb tooth body 77 have not only hair that is placed flat against the skin but also hair that extends from the skin so as to be tangled. Since it is captured and pulled into the cutting region of the movable inner blade 15, long hairs and comb hairs can be reliably cut even at this point. In addition, when a plurality of (three in the illustrated example) teeth 76a and 76b are continuously formed so as to avoid the place where the support legs 72 are formed, the support legs 72 are supported as shown in FIGS. Since the dimension of the opening 78 can be made as large as possible as compared with a form in which legs and teeth are alternately arranged in parallel, long hairs and the like can be smoothly drawn into the cutting region of the movable inner blade 16. .

  In addition, like the fixed outer blade 15 according to the present embodiment, the teeth 76a and 76a at both ends in the left-right direction constituting the comb tooth body 77 have front-rear spacing distances from the upper wall in the front-rear direction. If the teeth are formed so as to be enlarged as they are separated from each other in the direction, the distance between the tips of the teeth 76a and 76a is defined by the distance between the teeth, as compared with the form in which each tooth is linear as in Patent Document 1. Since the capture region of the long hairs and comb hairs of the comb teeth 77 can be taken large, the probability that the long hairs hit the support legs 72 can be made as small as possible. It can be efficiently pulled into the cutting region of the movable inner blade 16 through the opening 78 provided in the cutting and cutting. In other words, the capture region (S1: see FIG. 7) of the comb teeth 77 can be enlarged by the amount of the teeth 76a and 76a related to the left and right end portions formed in an expanded shape, and the region reaching the support leg 72 (see FIG. 7). Since S2) can be reduced, it is possible to effectively suppress the occurrence of cutting defects due to the long hairs or the like hitting the support legs 72 and thus preventing the movable inner blade 16 from entering the cutting region. In addition, when the teeth 76a and 76a related to the left and right end portions are formed in an open shape in this way, when the electric razor is moved in the left and right direction, the long hair captured at the tips of the teeth 76a and 76a is It is easy to be pulled into the capture region S1 side along the opposing inner surface of the tip. That is, the captured long hair or the like can be given directivity toward the capturing region S1, and therefore, the long hair or the like can be efficiently drawn into the cutting region of the movable inner blade 16 and cut also at this point. .

  When the protruding dimension from the upper wall 73 of the tooth 76b located at the center in the left-right direction of the comb tooth body 77 is set smaller than that of the teeth 76a and 76a at both ends, that is, the tooth 76b at the center. Is shorter than the teeth 76a and 76a on both ends, the long hair captured by the teeth 76a and 76a on both ends hits the teeth 76b on the center, and the penetration of the movable inner blade 16 into the cutting region is inhibited. Can be prevented well. This is also considered to improve the cutting efficiency of long hair and the like.

  As shown in FIG. 13 according to Patent Document 1, when the teeth 105 and 105 formed on the front and rear edges of the upper wall 103 are formed in a contrasting manner, the formation regions of the front and rear support legs 104 coincide with each other. Therefore, when the fixed outer blade 100 is moved in the front-rear direction, long hairs or the like existing in the formation region of the support leg 104 cannot be captured, and the cutting operation cannot be performed efficiently. That is, it is inevitable that a defective cut portion that cannot cut long hair or the like occurs. In this respect, as in the present embodiment, the teeth 76a and 76b formed on the front edge side of the upper wall 73 and the teeth 76a and 76b formed on the rear edge side of the upper wall 73 are displaced in the left-right direction. If they are arranged in a shape (see FIG. 7), the formation regions of the front and rear support legs 72 do not coincide with each other, so that a portion that becomes defective in cutting does not occur, and cutting work such as long hair can be performed efficiently.

  When the lower end portion of the opening 78 is curved downward and the portion is used as a fuzz discharge opening, an increase in manufacturing cost can be suppressed and electricity can be produced at low cost compared with a mode in which a foul discharge discharge opening is separately provided. Can provide razor. The shape of the opening 78 is substantially obtained by making the base end protruding from the front and rear walls 70 and 71 of the support leg 72 into a flared shape that gradually becomes wider as the width dimension in the left-right direction goes downward. Therefore, the strength of the support leg 72 can be improved, and therefore the support leg 72 can be effectively prevented from being bent or deformed. Thereby, since the strength reduction of the stationary outer blade 15 due to the provision of the opening 78 can be suppressed, the strength can be made necessary and sufficient without increasing the thickness dimension of the stationary outer blade 15.

  In addition, the fixed outer blade 15 applies a plastic deformation to the connecting portion between the upper wall 73 and the support leg 72 with respect to the sheet-like outer blade blank 80 formed by the etching method as shown in FIG. If it is formed in a letter shape, the upper wall 73 and the support leg 72 are molded separately, and the increase in the number of parts is suppressed as compared with a form in which both are welded and fixed. Can be provided. If the width dimension (t1) of the support leg 72 is larger than the width dimension of the teeth 76a and 76b constituting the comb tooth body 77, the strength of the support leg 72 can be improved. It is possible to effectively prevent bending and deformation. Thereby, since the strength reduction of the stationary outer blade 15 due to the provision of the opening 78 can be suppressed, the strength can be made necessary and sufficient without increasing the thickness dimension of the stationary outer blade 15. As shown in FIG. 3, when the teeth 76a and 76b are formed to be slightly inclined downward with respect to the horizontal direction, the teeth 76a and 76b are extended straight from the upper wall 73 in the horizontal direction. Thus, when the center blade 10 is pressed against the skin surface, the tips of the teeth 76a and 76b are less likely to directly contact (in a point contact) with the skin surface, and thus are excellent in that there is less risk of damaging the skin surface. ing. It is also excellent in that it can prevent a decrease in the feeling of use of the electric razor due to the provision of the comb teeth 77 by making the skin contact soft.

  FIG. 9 shows a fixed outer blade 15 for an electric razor according to the second embodiment of the present invention. Here, the first point is that all the portions of the teeth 76a and 76a of the left and right ends constituting the comb tooth body 77 are bent in the left and right diagonal directions so as to go in the direction in which the support legs 72 are formed. This is different from the fixed outer blade 15 according to the embodiment. That is, in the fixed outer blade 15 according to the second embodiment, the teeth 76a and 76a related to both ends in the left-right direction are linear, and the teeth 76a and 76a are the protruding proximal ends from the upper wall 73. It is directed from the root to the direction in which the support legs 72 are formed. Since other than that is equivalent to 1st Embodiment, the same code | symbol is attached | subjected to the same member and the description is abbreviate | omitted. The effect obtained by this form is also the same as that shown in the first embodiment.

  FIG. 10 shows a fixed outer blade 15 for an electric razor according to a third embodiment of the present invention. In this case, only the tip of either one of the teeth 76a and 76a at both ends in the left-right direction constituting the comb tooth body 77 is inclined left and right so as to go in the left-right direction so as to go in the forming direction of the support leg 72b. The point bent in the direction is different from the fixed outer blade 15 according to the first embodiment. Since other than that is equivalent to 1st Embodiment, the same code | symbol is attached | subjected to the same member and the description is abbreviate | omitted. Thus, even when only one of the teeth 76a is bent, the capture region S1 such as the long hair of the comb tooth 77 can be made as large as possible, and the region S2 reaching the support leg 72 can be made small. Generation | occurrence | production of the malfunction which the penetration | invasion into the cutting | disconnection area | region of the movable inner blade 16 by long hair etc. contact | winning the support leg 72 can be suppressed effectively, Therefore Long hair etc. can be cut | disconnected efficiently.

  11 and 12 show an electric razor fixed outer blade 15 according to a fourth embodiment of the present invention. In this case, a pair of left and right teeth 76a and 76a constitute a comb tooth body 77, and only the protruding tip portion of each tooth 76a other than the sliding contact portion of the inner blade 16 is gently bent downward. This is different from the first embodiment. That is, only the tip end portion of the tooth 76a located outside the front and rear walls 70 and 71 is gently bent downward. In FIG. 12, reference numeral 90 indicates a flat area, and reference numeral 91 indicates a bent area. Since other than that is equivalent to 1st Embodiment, the same code | symbol is attached | subjected to the same member and the description is abbreviate | omitted.

  Thus, if only the tip of the tooth 76a located outside the front and rear walls 70 and 71 is gently bent downward, the whole tooth 76a is bent downward as in the first embodiment according to FIG. Compared to the form, it is possible to easily obtain a good sliding contact between the movable inner blade 16 and the fixed outer blade 15, and thus the center blade 10 having a good sharpness can be obtained at low cost. Compared with the form in which the teeth 76a and 76b are extended straight from the upper wall 73 in the horizontal direction, when the center blade 10 is pressed against the skin surface, the tips of the teeth 76a and 76b are directly (spotted) on the skin surface. It is excellent in that it is difficult to hit (in contact), and therefore less likely to damage the skin surface. In addition, if only the tip portion of the tooth 76a is gently bent downward, the tooth 76a against the skin surface when the center blade 10 (see FIG. 3) is pressed against the skin surface by the flat region 90. Since the contact area can be increased as compared with the case where the entire teeth 76a as shown in FIG. 1 are bent downward, the feeling of use of the electric razor due to the provision of the comb teeth body 77 is made soft. It is also excellent in that it can prevent the deterioration well.

  In addition, in the fourth embodiment, the left and right width dimensions of the teeth 76a are set as large as possible. Specifically, the left and right width dimensions of the teeth 76a are set larger than that of the support legs 72, and the left and right width dimensions of the teeth 76a are made larger than those of the first embodiment. By increasing the area of the teeth 76a in this way, the contact area of the teeth 76a with the skin surface when the center blade 10 is pressed against the skin surface can be increased. The use feeling of the electric shaver due to the provision of 77 can be well prevented.

  In the above embodiment, the comb tooth body 77 is composed of the two teeth 76a and 76a or the three teeth 76a and 76b, but the number of teeth constituting the comb tooth body 77 is more than that. May be. In the above-described embodiment, the teeth 76a and 76b are formed to be inclined obliquely downward by an angle θ with respect to the horizontal direction. However, the teeth 76a and 76b extend in the horizontal direction from the front and rear edges of the upper wall 73. It may be a thing.

The perspective view of the fixed outer blade which comprises the electric razor which concerns on 1st Embodiment of this invention. External view of electric razor Longitudinal side view of razor head Exploded perspective view of razor head Vertical front view showing the drive structure of the center blade Disassembled front view of center blade Top view of fixed outer blade Top view of outer blade blank The top view of the fixed outer blade which concerns on 2nd Embodiment The top view of the fixed outer blade which concerns on 3rd Embodiment The top view of the fixed outer blade which concerns on 4th Embodiment Vertical side view of a fixed outer blade according to a fourth embodiment Plan view of a fixed outer blade according to a conventional form

Explanation of symbols

15 fixed outer blade 16 movable inner blade 70 front wall 71 rear wall 72 support leg 73 upper wall 76a teeth 76b located at both ends in the left-right direction constituting the comb teeth body teeth 77 located in the central portion constituting the comb teeth body Tooth body 78 Opening 80 Blade blank

Claims (7)

A fixed outer blade (15) having an inverted U-shaped cross section including the upper wall (73) and left and right laterally long front and rear walls (70, 71), and reciprocating in the left-right direction within the fixed outer blade (15) An electric razor comprising a driven movable inner blade (16),
At the upper ends of the front and rear walls (70, 71) of the fixed outer blade (15), a plurality of support legs (72) are formed projecting upward at a predetermined interval. The front and rear walls (70, 71) and the upper wall (73) are connected via (72),
A comb composed of a plurality of teeth (76a, 76b) formed in a cantilevered manner from the front and rear edges of the upper wall (73) between the adjacent support legs (72) in the front-rear direction. A tooth body (77) is provided,
Between the adjacent support legs (72), an opening (78) for drawing the scissors captured by the teeth (76a, 76b) into the cutting region of the movable inner blade (16) is opened,
The tip or all of one or all of the teeth (76a) adjacent to the support leg (72) are bent in an oblique direction to the left and right so as to go in the direction in which the support leg (72) is formed. And electric razor.   The teeth (76a) related to the left and right ends constituting the comb tooth body (77) expand such that the distance between the left and right opposing spaces at the tip ends increases as the distance from the upper wall (73) increases in the front-rear direction. The electric shaver according to claim 1, which is formed in an open shape. Comb body (77) is constituted by three teeth (76a · 76 b), the teeth of the both end portions of the right and left directions (76a · 76a) is above the opposing spacing dimension in mutual tip wall (73) is formed in an expanded shape so as to increase in the longitudinal direction,
The protruding dimension from the upper wall (73) of the tooth (76b) located at the center in the left-right direction of the comb tooth body (77) is set smaller than that of the tooth (76a) according to both ends. The electric razor according to 1 or 2.   The teeth (76a, 76b) formed on the front edge side of the upper wall (73) and the teeth (76a, 76b) formed on the rear edge side of the upper wall (73) are arranged in a state shifted in the left-right direction. The electric shaver according to any one of claims 1 to 3.   The electric razor according to any one of claims 1 to 4, wherein a lower end portion of the opening (78) is formed in a downwardly concave curved shape as an opening for discharging fuzz.   The width dimension (t1) in the left-right direction of the support leg (72) is set to be larger than the width dimension (t2) in the left-right direction of each tooth (76a, 76b). Electric razor.   The fixed outer blade (15) is reversed by plastically deforming the connecting portion between the upper wall (73) and the support leg (72) with respect to the sheet-shaped outer blade blank (80) formed by the etching method. The electric shaver according to any one of claims 1 to 6, wherein the electric shaver is formed in a U shape.

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