JP4743624B2 - Electric razor - Google Patents

Description

  The present invention relates to an electric razor provided with a reciprocating cutting blade unit that can be surely shaved with a scissors or the like. The cutting blade is constituted by using a slit blade, a comb tooth or a saw blade as a cutting element.

  As shown in Patent Documents 1 and 2, this type of cutting blade unit includes a laterally long outer blade, a laterally long inner blade that slides along the inner surface of the outer blade, and an inner blade holder that supports the inner blade. Provided, and the inner blade is reciprocated in the left-right direction via the inner blade holder to cut the scissors.

  In the cutting blade unit, the inner blade reciprocates in the left-right direction in a state where the inner blade is always pressed against the inner surface of the outer blade by a leaf spring or the like. Further, in Patent Document 2, the entire cutting blade unit is pushed up and biased by an elastic body such as a spring, whereby the cutting blade unit is greatly inclined to the left and right and hits a holding plate disposed below the cutting blade unit. It prevents the generation of noise.

JP-A-9-253353 (FIGS. 1-2) Japanese Patent Laid-Open No. 6-182064 (FIG. 1)

  In Patent Documents 1 and 2, the spring that presses the inner blade against the inner surface of the outer blade and the spring that pushes up and biases the cutting blade unit are independent of the cutting blade unit, and as much as that, it takes time to assemble the electric razor. In addition, it takes time, and there is a problem in that the number of parts is increased and the labor of parts management is increased.

  Therefore, an object of the present invention is to provide an electric razor that can reduce the labor and time required for assembling a cutting blade unit and reduce the manufacturing cost.

  As shown in FIGS. 1 and 7, the electric razor of the present invention has a horizontally long outer blade 61 in which the cutting blade unit 5 has a lower end surface opened, and a left and right horizontally long inner blade that is in sliding contact with the inner surface of the outer blade 61. 62, an inner blade holder 63 that supports the inner blade 62, and an outer blade reinforcing frame 65 that receives the lower end of the outer blade 61. The outer blade reinforcing frame 65 includes an inner blade pressing spring 109 that presses and biases the inner blade 62 against the inner surface of the outer blade 61 via the inner blade holder 63, and a unit lifting spring 110 that pushes and biases the cutting blade unit 5. Are provided integrally. The outer blade reinforcing frame 65 may be divided into a plurality as shown in FIG. Each of the inner blade pressing springs 109 and the unit lifting springs 110 may be provided for the outer blade reinforcing frame 65, or a plurality of them may be provided.

  Specifically, the outer blade reinforcing frame 65 extends between the left and right end portions of the outer blade 61, and a pair of left and right side end pieces 66 and 66 are disposed on the left and right sides of the outer blade 61, respectively. The outer blade reinforcing frame 65 and the outer blade 61 are coupled by the side end pieces 66, 66, so that the outer blade reinforcing frame 65 connects the inner blade 62 via the inner blade pressing spring 109 and the inner blade holder 63. In the supported state, the outer blade reinforcing frame 65, the outer blade 61, the inner blade 62, and the inner blade holder 63 are unitized.

  Specifically, pins 75 project from the front and rear side surfaces of each side end piece 66, and the outer blade 61 includes a blade portion 70 and a support portion 71 that extends downward from the front and rear ends of the blade portion 70. Yes. An engaging portion 76 that can engage with the pin 75 of each side end piece 66 is formed in the support portion 71 of the outer blade 61, and the pin 75 of each side end piece 66 can engage with the outer blade reinforcing frame 65. The engaging portion 107 is formed. Then, the pin 75 of each side end piece 66 is engaged with the engaging portion 76 of the outer blade 61 and the engaging portion 107 of the outer blade reinforcing frame 65 through the side end piece 66 by engaging with each other. Thus, the outer blade reinforcing frame 65 and the outer blade 61 are coupled.

  As a modification, as shown in FIGS. 13 and 14, connecting claws 119 that are engaged with the lateral grooves 120 provided in the side end piece 66 are formed on the left and right ends of the support portion 71 of the outer blade 61, respectively. At the left and right ends of the outer blade reinforcing frame 65, connecting pieces 121 are formed to be engaged with the engaging portions 122 provided on the side end piece 66, and the connecting claw 119 of the outer blade 61 is a lateral groove of the side end piece 66. 120, and the connecting piece 121 of the outer blade reinforcing frame 65 is engaged with the engaging portion 122 of the side end piece 66, whereby the outer blade reinforcing frame 65 and the outer blade are interposed via the side end piece 66. 61 may be combined.

  When the unit push-up spring 110 is disposed on the outer side in the left-right direction of the cutting blade unit 5 with respect to the inner blade pressing spring 109, it becomes difficult to rattle even if an external force is applied to the left and right ends of the outer blade 61.

  According to the present invention, the structural strength of the outer blade 61 is increased by the amount of the outer blade reinforcing frame 65 that receives the lower end of the outer blade 61, and the outer blade 61 is reliably bent or twisted. Can be prevented. In addition, since the unit push-up spring 110 and the inner blade pressing spring 109 are integrally provided on the outer blade reinforcing frame 65, the labor and time required for assembling the cutting blade unit 5 can be greatly reduced, and the unit push-up can be greatly reduced. The number of parts can be reduced as compared with the case where the spring 110 and the inner blade pressing spring 109 are separated. Thereby, the manufacturing cost of the cutting blade unit 5 can be reduced.

  When the outer blade reinforcing frame 65 and the outer blade 61 are joined by the side end pieces 66, 66, the outer blade reinforcing frame 65 and the outer blade 61 can be integrated by simply assembling them without performing work such as adhesion. Therefore, it is possible to further reduce the labor required for assembling the cutting blade unit 5.

  When the unit push-up spring 110 is arranged on the outer side in the left-right direction of the cutting blade unit 5 with respect to the inner blade pressing spring 109 and the external blade 61 is less likely to rattle even when an external force is applied to the left and right ends, the cutting blade unit 5 It is possible to reduce tilting and hitting the lower support frame 90 and the like. That is, it is possible to prevent the cutting blade unit 5 from being tilted and hitting the support frame 90 or the like while giving the upper and lower elasticity to the cutting blade unit 5 by the unit push-up spring 110.

Example 1 FIGS. 1 to 10 show Example 1 of an electric shaver according to the present invention. As shown in FIG. 2, the electric razor includes a main body 1 that also serves as a grip, and a head 2 that is disposed above the main body 1. As shown in FIG. 5, the head portion 2 is attached to the main body portion 1 through a float mechanism 19 made of a coil spring or the like, and the entire head portion 2 is necked in all directions including front and rear, left and right, up and down, and diagonal directions. Supported in a swingable state.

  As shown in FIGS. 2 to 4, the head unit 2 includes a pair of front and rear rotary main blades 3, 3 and a reciprocating center blade (cutting blade unit) disposed between the main blades 3, 3. 5, a horizontal motor 6 serving as a driving source for the main blade 3 and the center blade 5, a drive mechanism 7 for transmitting the driving force of the motor 6 to the main blade 3 and the center blade 5, and the like And a pair of front and rear covers 10, 10, and an inner blade unit 11 and an outer blade unit 12 that are detachably attached to the head case 9. Each main blade 3 mainly cuts short scissors, and the center blade 5 mainly cuts long scissors.

  The main body 1 is assembled with front and rear covers 16 and 17 that cover a liquid-tight inner case (not shown) containing the secondary batteries 13 and 13, the control circuit board 15, and the like, and the front cover 16. Display panel 20 and switch panel 21. A wrinkle blade unit 22 is incorporated in the upper rear surface of the rear cover 17. The fine razor blade unit 22 includes a fixed blade and a movable blade each having a saw blade-like cutting blade, and the movable blade is reciprocally driven by the motor 6 via the drive mechanism 7.

  The display panel 20 is formed of a translucent half mirror or the like. The display panel 20 displays the operating state and operation mode of the motor 6 when the electric razor is used, and is used as a mirror for confirming the shaving result when the electric razor is not used. be able to. On the switch panel 21, a push button switch 23 for starting or stopping the motor 6 and a push button switch 25 for switching the operation mode of the motor 6 are arranged.

  As shown in FIG. 6, each main blade 3 is composed of a main outer blade 26 made of a thin plate-like mesh blade made of stainless steel, and a main inner blade 29 having a thin plate-like small blade 27 made of stainless steel. As shown in FIGS. 4 and 6, the outer blade unit 12 includes an outer blade holder 30 whose upper and lower surfaces are opened, and a blade body unit 31 that is detachably mounted on the upper portion of the outer blade holder 30.

  The blade unit 31 includes a pair of front and rear main outer blades 26 and 26 that are shaped like an inverted U in the front-rear direction, the center blade 5, and upper and lower surfaces that are open to the upper surface. And an outer blade frame 32 on which the blades 26 and 26 and the center blade 5 are arranged. The front and rear outer ends of each main outer blade 26 are fixed to the front and rear of the inner surface of the outer blade frame 32, respectively.

  As shown in FIGS. 4 and 5, lock bodies 33 and 33 for locking and holding the outer blade unit 12 are arranged on both the left and right sides of the head case 9. Each lock body 33 has an engaging claw 36 extending upward, and is urged by a spring 37 to the outside of the head case 9 in the left-right direction. By this urging, the engaging claws 36 of each lock body 33 are engaged with engaging recesses 39 respectively formed on the left and right sides of the inner surface of the outer blade holder 30 of the outer blade unit 12. When each lock body 33 is pushed in against the urging force of the spring 37, the engaging claw 36 is detached from the engaging recess 39 of the outer blade holder 30, and the outer blade unit 12 can be removed from the head case 9.

  Lock buttons 40 and 40 for locking and holding the blade unit 31 are provided on both the left and right sides of the outer blade holder 30, respectively. The blade body unit 31 can be pushed out from the outer blade holder 30 by pushing in the lock buttons 40.

  The inner blade unit 11 is disposed horizontally on the inner blade frame 45 in which hollow bearing walls 43 and 43 are erected on the left and right sides of the horizontally long base wall 42, and horizontally on the bearing walls 43 and 43, respectively. And a pair of upper and lower gears 46 and 46 disposed in one bearing wall 43 (left side in FIG. 4).

  The gears 46 and 46 are connected to the gear 47 of the drive mechanism 7, and the driving force of the motor 6 is transmitted to the main inner blades 29 and 29 via the drive mechanism 7 and the gears 46 and 46. . Locking recesses 49 are respectively provided on the left and right sides of the lower surface of the base wall 42 of the inner blade unit 11, and a lock claw 50 disposed on the upper surface of the head case 9 is detachably engaged with each locking recess 49. Stopped.

  On both the left and right sides of the upper surface of the head case 9, a cover 51 that covers a part of the drive mechanism 7 connected to the gear 47 and a part of a release mechanism 52 that removes the front and rear lock claws 50 from the locking recess 49 are covered. The cover 53 is formed upright. On the outer surface side of the cover 53, a release button 55 for releasing the locking claw 50 by the release mechanism 52 protrudes. By pushing the release button 55, the lock claw 50 is detached from the locking recess 49, and the inner blade unit 11 can be removed from the head case 9.

  As shown in FIG. 6, each main inner blade 29 has twelve small blades 27 embedded in a spiral shape in a cylindrical resin base 56, and each small blade 27 is the center of the main inner blade 29. It is arranged in a state of being inclined with respect to the axis. The drive mechanism 7 includes a speed reduction mechanism, a pulley, a timing belt, the gear 47, and the like, and reduces the rotation of the motor 6 and transmits it to each main inner blade 29. Each main inner blade 29 is rotationally driven around the horizontal axis, whereby the main inner blade 29 cooperates with the main outer blade 26 to cut the ridge.

  As shown in FIGS. 6 and 7, the center blade 5 has a laterally long center outer blade 61 formed in an inverted bowl shape having an open lower end surface, and a laterally long lateral center that slides along the inner surface of the center outer blade 61. An inner blade 62, an inner blade holder 63 that supports the center inner blade 62, an outer blade reinforcing frame 65 that receives the lower end portion of the center outer blade 61, and a pair of left and right side edges that are attached to the left and right sides of the center outer blade 61, respectively. Pieces 66 and 66 are provided, and by combining these parts, a single unit part can be obtained. Each side end piece 66 is made of a plastic molded product. The outer blade reinforcing frame 65 is formed by pressing a metal plate material such as a stainless plate material.

  The center outer blade 61 includes a blade portion 70 in which a plurality of comb blade-shaped cutting blades 69 are formed, and a pair of front and rear support portions 71 that extend downward from the front and rear ends of the blade portion 70 to support the blade portion 70. 71 is integrally provided, and is formed by pressing a sheet-like blade blank formed by an etching method.

  The cutting edges 69 are formed side by side in the left-right direction with respect to the front and rear edges of the base frame 72 at the center in the front-rear direction of the blade portion 70. The entire center outer blade 61 is bent into an inverted trapezoidal cross section, and the upper surface of the blade portion 70 including the base frame 72 is substantially flat as shown in FIG. The left and right end portions of the blade portion 70 are respectively placed on the upper left and right sides of the outer blade frame 32 (see FIG. 1).

  As shown in FIG. 7, a pair of left and right pins 75 project from the front and rear side surfaces of the left and right side end pieces 66 and 66, respectively. A pair of left and right engaging portions 76 are cut out at the left and right ends of each support portion 71 of the center outer blade 61. As shown in FIGS. 7 and 8, each engaging portion 76 is bent after extending upward from the lower end of the support portion 71 to form a fitting groove 76a extending toward the center in the left-right direction.

  Each pin 75 of each side end piece 66 enters and engages with the fitting groove 76a from the lower end of each engaging portion 76, so that the side end piece 66 is engaged in the state where the vertical movement is restricted. 76 is attached. In this state, as shown in FIG. 9 and FIG. 10, each pin 75 has its tip portion protruding to the outside of the support portion 71 of the center outer blade 61.

  As shown in FIG. 7, the center inner blade 62 has a plurality of cutting blades 77 formed in a saw blade shape by an etching method. That is, the cutting blades 77 are formed side by side in the left-right direction with respect to the front and rear edges of the base frame 79 at the center of the front and rear of the center inner blade 62. The center inner blade 62 is integrally provided with connecting claws 80 and 80 that are bent obliquely downward from the left and right ends of the base frame 79, respectively. The support portion of the center inner blade 62 serves as the connecting claws 80. The center outer blade 61 and the center inner blade 62 are each made of a stainless steel plate material. When the thickness of the center outer blade 61 is 0.35 mm, the thickness of the center inner blade 62 is 0.3 mm. did.

  As shown in FIGS. 7 and 8, the inner blade holder 63 is made of a horizontally long plastic molded product whose lateral dimension is slightly larger than that of the center inner blade 62, and a driving piece 81 (see FIG. 5) of the driving mechanism 7 at the center of the lower surface. A gate-shaped passive piece 82 is formed to project downward. Four protrusions 83 for receiving and supporting the center inner blade 62 are formed on the upper surface of the inner blade holder 63, and the center inner blade is formed on the upper surface of each convex portion 85 connected to the left and right protrusions 83. Engagement holes 86 for inserting and engaging the 62 connecting claws 80 are respectively opened.

  Left and right laterally elongated ridges 87 are respectively formed on the lower surfaces of the left and right ends of the inner blade holder 63, and each ridge 87 is formed on the upper surface of each side end piece 66 as shown in FIGS. The left and right laterally elongated grooves 89 are respectively fitted.

  As shown in FIG. 6, a support frame 90 for fixing the front and rear inner ends of each main outer blade 26 is attached to the outer blade frame 32 of the blade body unit 31. As shown in FIGS. 1 and 4, the support frame 90 includes a top wall 92 provided with a horizontally long hole 91 through which the passive piece 82 of the inner blade holder 63 is inserted in the center in the left-right direction, and front and rear edges of the top wall 92. The front and rear side walls 93 and 93 bent downward and the left and right side walls 97 and 97 respectively provided with engagement holes 96 to be engaged with the engaging projections 95 formed on the left and right outer sides of the side end pieces 66 are integrally provided. The vertical dimension of the engagement hole 96 is larger than the vertical dimension of the locking projection 95, and the center blade 5 is prevented from coming off upward in a state in which the center blade 5 can swing up and down.

  A protective plate 99 is detachably attached to the lower end of the support frame 90. That is, a plurality of upward locking claws 100 are provided at the left and right ends of the protective plate 99, and the respective locking claws 100 are notches 101 formed at the left and right ends of the front and rear side walls 93 and 93 of the support frame 90. The protective plate 99 is mounted on the support frame 90 (the state shown in FIG. 1). At both left and right ends of the support frame 90, locking pieces 102 are formed to protrude outward. The support frame 90 is locked to the outer blade frame 32 by the locking pieces 102.

  As shown in FIG. 7, each side end piece 66 has the pin 75, the groove 89, and the locking projection 95, and the outer edge reinforcing frame 65 is located outside the center by the side end pieces 66 and 66. The outer blade reinforcing frame 65 and the center outer blade 61 are coupled to each other by being externally fitted to the lower end of the blade 61. The outer blade reinforcing frame 65 extends between the left and right ends of the center outer blade 61, and is bent to the bottom wall 105, the front and rear side walls 106 and 106 bent upward from the front and rear edges of the bottom wall 105, and the left and right sides of the front and rear side walls 106 and 106. It has a pair of left and right engaging holes 107 provided at both ends.

  As shown in FIGS. 9 and 10, each pin 75 of each side end piece 66 is engaged with each engagement hole 107 of the front and rear side walls 106 and 106 via each engagement portion 76 of the center outer blade 61. The outer blade reinforcing frame 65 is attached to the center outer blade 61. Each pin 75 is engaged with each engagement hole 107 in a state of being penetrated.

  On the left and right sides of the bottom wall 105 of the outer blade reinforcing frame 65, as shown in FIGS. 1 and 8, a pair of left and right sides press and urge the center inner blade 62 against the inner surface of the center outer blade 61 via the inner blade holder 63. Inner blade pressing springs 109 and 109 and a pair of left and right unit pressing springs 110 and 110 that push up and urge the center blade 5 are integrally provided.

  The left and right inner blade pressing springs 109 and 109 rise obliquely upward and contact the lower surface of the inner blade holder 63. The left and right unit lifting springs 110 and 110 are more than the left and right inner blade pressing springs 109 and 109, respectively. It is arranged on the outer side in the left-right direction of the center blade 5. The left and right unit push-up springs 110 and 110 extend obliquely downward and contact the upper surface of the upper wall 92 of the support frame 90. That is, the interval between the left and right unit push-up springs 110 and 110 is increased, and the inclination of the center blade 5 can be firmly received by the unit push-up springs 110 and 110 and the tilt of the center blade 5 can be reliably suppressed.

  As shown in FIGS. 7 and 8, it is formed on the lower surface of each side end piece 66 on both the left and right sides of the bottom wall 105 of the outer blade reinforcing frame 65 and between the inner blade pressing spring 109 and the unit lifting spring 110. Engagement holes 112 with which the engaged protrusions 111 are respectively engaged are formed. The engagement protrusion 111 of each side end piece 66 engages with the engagement hole 112 of the outer blade reinforcing frame 65, so that the lateral movement of each side end piece 66 is restricted. A horizontally long hole 113 through which the passive piece 82 of the inner blade holder 63 is inserted is provided in the center of the bottom wall 105 of the outer blade reinforcing frame 65.

  The center blade 5 is assembled in the following procedure. First, the left and right connecting claws 80, 80 of the center inner blade 62 are inserted into the left and right engagement holes 86, 86 of the inner blade holder 63, and the center inner blade 62 is mounted on the upper surface of the inner blade holder 63. Further, the pins 75 and 75 of one side end piece 66 are fitted to the engaging portions 76 and 76 on the left and right sides of the center outer blade 61.

  Next, while fitting the left and right convex ridges 87 of the inner blade holder 63 to which the center inner blade 62 is attached to the groove 89 on the upper surface of the one side end piece 66, Along the center inner blade 62. Thereafter, the pins 75 and 75 of the other side end piece 66 are fitted to the engaging portions 76 and 76 on the other side of the center outer blade 61, and the projecting portion 87 on the other side of the inner blade holder 63 is moved to the other side. The side end piece 66 is fitted into the groove 89 on the upper surface.

  Then, after attaching both end pieces 66, 66 to the center outer blade 61, the outer blade reinforcing frame 65 is attached to the center outer blade 61. In other words, the outer blade reinforcing frame 65 is attached to the center outer blade 61 and the side end pieces 66 and so that the front and rear side walls 106 and 106 of the outer blade reinforcing frame 65 are fitted to the lower ends of the support portions 71 and 71 of the center outer blade 61. Push from below 66. Then, the front and rear side walls 106 and 106 of the outer blade reinforcing frame 65 are elastically deformed so as to spread in the front and rear direction, get over the pins 75 of the side end pieces 66 and 66, and then each of the outer blade reinforcing frames 65 by elastic restoring force. The engagement hole 107 snaps into each pin 75. At this time, the engagement projections 111 of each side end piece 66 engage with the engagement holes 112 and 112 of the outer blade reinforcement frame 65, respectively, and the holes 113 of the bottom wall 105 of the outer blade reinforcement frame 65 enter the inner holes 113. The passive piece 82 of the blade holder 63 is inserted.

  In this state, each side end piece 66 is firmly fixed to the center outer blade 61 without moving up, down, left and right. Further, the side end pieces 66 and 66 are positioned between the front and rear support portions 71 and 71 of the center outer blade 61, and the front and rear side walls 106 and 106 of the outer blade reinforcing frame 65 are covered outside the support portions 71 and 71. The front and rear side walls 106 and 106 press the support portions 71 and 71 facing the side end pieces 66 and 66 by the elastic force of the outer blade reinforcing frame 65. Accordingly, the support portions 71 and 71 of the center outer blade 61 do not move in the front-rear direction, so that the center outer blade 61 can be reliably prevented from being distorted and the sharpness of the center blade 5 can be prevented from being lowered.

  In this way, the outer blade reinforcing frame 65 and the center outer blade 61 are coupled by the side end pieces 66, 66, and the outer blade reinforcing frame 65 is connected to the center inner blade 62 via the inner blade pressing spring 109 and the inner blade holder 63. The center outer blade 61, the center inner blade 62, the inner blade holder 63, the left and right side end pieces 66 and 66, and the outer blade reinforcing frame 65 are integrated (unitized). The assembly of the center blade 5 does not require the use of an adhesive or the like, so that the labor required for the assembly can be reduced.

  When the center blade 5 is mounted on the blade unit 31, the left and right unit push-up springs 110 and 110 of the outer blade reinforcing frame 65 come into contact with the upper surface of the upper wall 92 of the support frame 90. When this blade unit 31 is mounted on the outer blade unit 12 and assembled to the head case 9, the drive piece 81 of the drive mechanism 7 engages with the passive piece 82 of the inner blade holder 63. In this state, the center inner blade 62 is driven to reciprocate left and right along the inner surface of the center outer blade 61 by the motor 6.

(Example 2) In Example 2, as shown in FIG. 11, the outer blade reinforcing frame 65 is divided into a pair of left and right small reinforcing frames 115 and 115. Each small reinforcing frame 115 is provided with the inner blade pressing spring 109, the unit lifting spring 110, the engagement hole 112, and four front and rear engagement holes 107. And each small reinforcement frame 115 is each attached to the right-and-left both ends of the lower end of the center outer blade 61 via each side end piece 66 similarly to Example 1. FIG.

  The left and right length dimensions of each small reinforcing frame 115 are set to be approximately the left and right length dimensions of the side end piece 66. As with the first embodiment, the unit push-up spring 110 of each small reinforcing frame 115 is on the outer side in the left-right direction with respect to the inner blade pressing spring 109 in the center blade 5. Since the other points are the same as those of the first embodiment, description thereof is omitted.

(Example 3) In Example 3, as shown in FIG. 12, the unit lifting spring 110 and the inner blade pressing spring 109 of the outer blade reinforcing frame 65 are formed in a continuous manner. The blade pressing spring 109 is a continuous spring. Also in the third embodiment, the unit push-up spring 110 is on the outer side in the left-right direction at the center blade 5 than the inner blade pressing spring 109 as in the first embodiment. Since the other points are the same as those of the first embodiment, description thereof is omitted.

(Embodiment 4) In Embodiment 4, as shown in FIGS. 13 and 14, the lateral grooves 120 provided on the front and rear side surfaces of the side end pieces 66 and 66 are provided at the left and right ends of the support portions 71 and 71 of the center outer blade 61, respectively. The connecting claws 119 engaged with each other are formed to extend outward in the left-right direction. In addition, on the left and right ends of the front and rear side walls 106 and 106 of the outer blade reinforcing frame 65, the connecting pieces 121 engaged with the locking portions 122 provided on the front and rear side surfaces of the side end pieces 66 and 66, respectively, are disposed on the outer side in the left and right direction. Each is formed to extend.

  Then, each connecting claw 119 of the center outer blade 61 is engaged with the lateral groove 120 of each side end piece 66, and each connecting piece 121 of the outer blade reinforcing frame 65 is engaged with each locking portion 122 of each side end piece 66. By doing so (the state shown in FIG. 14), the center outer blade 61 and the outer blade reinforcing frame 65 are coupled via the side end pieces 66 and 66. Since the other points are the same as those of the first embodiment, description thereof is omitted.

  As shown in FIGS. 15 and 16, the outer blade reinforcing frame 65 may be welded to the lower ends of the support portions 71 and 71 of the center outer blade 61 by spot welding or the like. In this case, the left and right side end pieces 66 and 66 can be omitted. In FIG. 15, locking protrusions 123 corresponding to the locking protrusions 95 of the side end piece 66 are integrally formed on the left and right ends of the outer blade reinforcing frame 65.

  Further, as shown in FIG. 17, the outer blade reinforcing frame 65 may be formed in a flat plate shape and welded to the lower ends of the support portions 71 and 71 of the center outer blade 61.

  In each of the above-described embodiments, the case where the center blade 5 is disposed between the pair of front and rear main blades 3 and 3 is exemplified. However, the center blade 5 is disposed outside the main blades 3 and 3 in the front-rear direction. Also good. Further, the center blade 5 does not need to be incorporated in the head portion 12 and can be incorporated in the main body case 1. In that case, a bulging wall adjacent to one of the main blades 3, 3 in the front-rear direction may be formed on the upper portion of the main body case 1, and the center blade 5 may be incorporated in the bulging wall.

  The main blades 3 and 3 may be constituted by the same slit blades or comb blades as the center blade 5. The outer blade reinforcing frame 65 can be formed of a plastic molded product. The center outer blade 61 and the center outer blade 61 may each be formed of a slit blade, a comb blade, a saw blade, or the like. The center outer blade 61 can also be configured with a mesh blade.

The longitudinal front view of the center blade which concerns on Example 1 of this invention Front view of electric razor Side view of electric razor Exploded perspective view of the head of an electric razor Longitudinal front view of the head Vertical side view of the head Disassembled perspective view of center blade It is a disassembled front view of the center blade which fractured | ruptured a part. AA line sectional view of FIG. BB sectional view of FIG. Longitudinal front view in which a part of the center blade according to the second embodiment is broken Longitudinal front view in which a part of the center blade according to Example 3 is broken Longitudinal front view in which a part of the center blade according to Example 4 is broken CC sectional view of FIG. Longitudinal front view in which a part of the center blade according to another embodiment is broken Vertical side view of the center blade of another embodiment Vertical side view of the center blade of another embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main part 2 Head part 3 Main blade 5 Center blade 61 Center outer blade 62 Center inner blade 63 Center inner blade 63 Inner blade holder 65 Outer blade reinforcement frame 66 Side end piece 70 Blade portion 71 Support portion 75 Pin 76 Engagement portion 107 Engagement hole 109 Inner blade pressing spring 110 Unit lifting spring 119 Connection claw 120 Horizontal groove 121 Connection piece 122 Engagement part

Claims (5)

The cutting blade unit (5) includes a laterally long outer blade (61) whose bottom end is open, a laterally long inner blade (62) that slides along the inner surface of the outer blade (61), and an inner blade (62). An inner blade holder (63) for supporting the outer blade (61), and an outer blade reinforcing frame (65) for receiving the lower end of the outer blade (61).
The outer blade reinforcing frame (65) includes an inner blade pressing spring (109) that presses and urges the inner blade (62) against the inner surface of the outer blade (61) via the inner blade holder (63), and a cutting blade unit ( 5) An electric razor characterized in that a unit push-up spring (110) that pushes up and biases the unit is integrally provided. The outer blade reinforcing frame (65) extends across the left and right ends of the outer blade (61),
A pair of left and right side end pieces (66) and (66) are respectively disposed on the left and right sides of the outer blade (61).
The outer blade reinforcing frame (65) and the outer blade (61) are joined together by the two end pieces (66) and (66), so that the outer blade reinforcing frame (65) is connected to the inner blade pressing spring (109) and the inner blade pressing spring (109). The outer blade reinforcing frame (65), the outer blade (61), the inner blade (62), and the inner blade holder (63) are unitized while the inner blade (62) is supported via the blade holder (63). The electric razor according to claim 1. A pin (75) projects from the front and rear sides of each side end piece (66),
The outer blade (61) includes a blade portion (70) and a support portion (71) extending downward from the front and rear ends of the blade portion (70),
The support portion (71) of the outer blade (61) is formed with an engagement portion (76) to which the pin (75) of each side end piece (66) can be engaged,
The outer blade reinforcing frame (65) is formed with engaging portions (107) to which the pins (75) of the side end pieces (66) can be respectively engaged.
The pin (75) of each side end piece (66) is engaged with the engaging part (76) of the outer blade (61) and the engaging part (107) of the outer blade reinforcing frame (65). The electric shaver according to claim 2, wherein the outer blade reinforcing frame (65) and the outer blade (61) are coupled to each other through the side end piece (66). At both left and right ends of the support portion (71) of the outer blade (61), connection claws (119) that are engaged with the lateral grooves (120) provided in the side end piece (66) are formed, respectively.
The left and right ends of the outer blade reinforcing frame (65) are formed with connecting pieces (121) that are engaged with engaging portions (122) provided on the side end pieces (66),
The connecting claw (119) of the outer blade (61) is engaged with the lateral groove (120) of the side end piece (66), and the connecting piece (121) of the outer blade reinforcing frame (65) is connected to the side end piece (66). The electric shaver according to claim 2, wherein the outer blade reinforcing frame (65) and the outer blade (61) are coupled via the side end piece (66) by being engaged with the engaging portion (122).   5. The electric shaver according to claim 1, 2, 3, or 4, wherein the unit push-up spring (110) is arranged on the outer side in the left-right direction of the cutting blade unit (5) with respect to the inner blade pressing spring (109).

Images