JP5780665B2 - Electric razor - Google Patents

Description

  The present invention relates to an electric razor having a skin stretching structure. The skin stretching structure is provided in order to effectively cut the beard in a short time by, for example, stretching the skin surface to raise comb hairs and promoting the introduction of the beard to the outer blade.

  An electric razor having this kind of skin stretching structure can be found in, for example, Patent Documents 1 and 2. In the electric razor of Patent Document 1, a pressing member that swings back and forth along the surface of the outer blade is provided, and the skin surface is directed toward the blade surface by reciprocating the pressing member back and forth with respect to the blade surface. It pushes and bulges to facilitate the introduction of the beard. When the pressing member swings in a direction away from the blade surface, it is considered that the skin can be stretched to raise the beard.

  In the electric razor of Patent Document 2, when the main blades arranged in parallel at the front and back are pressed against the skin surface, the main blades swing in directions away from each other to stretch the skin surface and promote the introduction of the beard. Specifically, the outer blades of the main blades are pressed in directions away from each other by the pressing reaction force from the skin surface, and the main blades are swung open and wide.

Japanese Patent Laid-Open No. 02-144092 (page 2, lower left column, line 10 to FIG. 5) JP-A-10-212369 (paragraph number 0065, FIG. 14)

  In the skin extension structure of Patent Document 1, the pressing member is swung back and forth, and the skin surface is pressed toward the blade surface to bulge and raise hairs. The pressing member is formed in a gate shape by a pair of left and right leg pieces and a pressing bar connecting the upper ends of the leg pieces, and a pressing bar having the same width as the outer blade is pressed against the skin surface. In addition, the pressing bar is driven back and forth in synchronization with the vibration of the inner blade using an inner blade driving vibrator. Therefore, at the time of cutting the whiskers, the inner blade and the pressing member are simultaneously driven by one motor. In particular, since the driving load of the pressing member that stretches the skin surface is large, the driving speed of the motor is likely to decrease. And beard cutting with an outer blade cannot be performed accurately. Increasing the output of the motor can prevent the drive speed from decreasing, but in that case, it is inevitable that the electric razor will become larger.

  In that respect, according to the electric razor of Patent Document 2, the front and rear main blades are swung away from each other to stretch the skin surface, so that an excessive load does not act on the motor. The problem is that the skin surface may not be stretched depending on how the main blade is applied to the skin surface, and it is necessary to get used to the method of use.

  An object of the present invention is to provide an electric razor equipped with a skin stretching structure that can eliminate an excessive load acting on a motor and that can unconsciously stretch the skin surface and accurately introduce a beard to the outer blade. There is to do.

  As shown in FIG. 1, the electric shaver according to the present invention is provided with a main blade 7 including an inner blade 11 and an outer blade 12 in the head portion 1, and is pressed against the skin surface adjacent to the main blade 7. It is characterized in that a skin stretching structure for stretching the skin surface under force is provided.

  The head part 1 is provided with a long hair cutting blade 8, and the long hair cutting blade 8 is movably supported. The skin stretching structure includes a skin pressing body 35 that is supported movably between a standby position and an operating position. The skin pressing body 35 is operated to the operating position in conjunction with the displacement of the long hair cutting blade 8 in response to the pressing reaction force from the skin surface.

  The skin extension structure includes a skin pressing body 35 that is pivotally supported by a support shaft 41 arranged in parallel to the main blade 7, and a skin pressing spring 36 that biases the skin pressing body 35 toward a standby position. including. On the upper surface of the skin pressing body 35, the skin pressing portion 39 and the cutting edge portion of the long hair cutting blade 8 are arranged with the support shaft 41 interposed therebetween. A skin pressing portion 39 is provided on the upper surface of the skin pressing body 35 on the side close to the main blade 7.

  The skin pressing body 35 includes a skin pressing arm 37 that is continuously provided toward the outer blade 12 of the main blade 7. As shown in FIG. 7, a group of comb teeth 47 for scoring long hairs toward the outer blade 12 is formed on the skin pressing portion 39 of the skin pressing arm 37.

  The comb teeth 47 are formed from the top surface of the protruding end of the skin pushing arm 37 to the exposed proximal end portion of the long hair cutting blade 8.

  An upward skin pressing piece 48 is provided on the upper surface near the protruding end of the skin pressing portion 39.

  The skin pressing body 35 includes a skin pressing arm 37 and an arm base 38 that extends downward continuously from the skin pressing arm 37. On the upper surface of the arm base portion 38 facing the exposed portion of the long hair cutting blade 8, a group of comb teeth 49 for scoring the long hair toward the long hair cutting blade 8 is formed.

  The skin pressing arm 37 is assembled to the outer blade holder 13 that holds the outer blade 12 so that the outer blade 12 and the skin pressing arm 37 can be attached to and detached from the head unit 1 together with the outer blade holder 13.

  On the peripheral surface of the outer blade 12 facing the skin pressing arm 37, slit-like long hair introduction holes 12b that are long in the front-rear direction are formed.

  In the electric razor according to the second invention, as shown in FIG. 8, a plurality of main razors are mounted on the head portion 1 that is supported so as to be movable in at least one of the front, rear, left, and right with respect to the main body 2. Either the blade 7 or at least one main blade 7 and at least one long hair cutting blade 8 is disposed. At least one of the main blade 7 and the long hair cutting blade 8 is supported by the head unit 1 so that it can be displaced between the reference position and the skin extension position, and is biased by the return spring 71 toward the reference position. In conjunction with the movement of the head unit 1, the head unit 1 has a skin extension structure that displaces at least one of the main blade 7 and the long hair cutting blade 8 to the skin extension position against the urging force of the return spring 71. Provide. When the head unit 1 is supported movably with respect to the main body unit 2, the moving operation of the head unit 1 includes horizontal movement in the left-right direction, left-right tilt, horizontal movement in the front-rear direction, front-back tilt, and vertical movement. , Which means that one of them is included. Of course, a plurality of operations may be included.

  The skin stretching structure includes a rack 80 and a pinion 81 that convert the movement operation of the head unit 1 into a rotation operation, and an operation cam 82 that rotates together with the pinion 81 (see FIG. 8). At least one of the main blade 7 and the long hair cutting blade 8 is displaced by the operation cam 82 to the skin extension position against the urging force of the return spring 71 to extend the skin surface.

  The skin stretching structure includes a fixed cam 85 provided on the main body 2 side and a passive cam 86 provided on at least one of the main blade 7 and the long hair cutting blade 8 and operated to be displaced by the fixed cam 85. (See FIG. 10). At least one of the main blade 7 and the long hair cutting blade 8 is displaced by the fixed cam 85 through the passive cam 86 to the skin stretch position while resisting the urging force of the return spring 71 to stretch the skin surface.

  As shown in FIG. 18, the head unit 1 is supported so as to be tiltable back and forth with respect to the main body unit 2. At least one of the main blade 7 and the long hair cutting blade 8 is supported by the head portion 1 so that it can be displaced between the reference position and the skin extension position, and is urged by the return spring 71 toward the reference position. In conjunction with the forward / backward tilting operation of the head portion 1, the skin extending structure that displaces at least one of the main blade 7 and the long hair cutting blade 8 to the skin extension position while resisting the biasing force of the return spring 71. Provided.

  As shown in FIG. 19, the head unit 1 is supported so as to be tiltable to the left and right with respect to the main body unit 2. At least one of the main blade 7 and the long hair cutting blade 8 is supported by the head portion 1 so that it can be displaced between the reference position and the skin extension position, and is urged by the return spring 71 toward the reference position. In conjunction with the left-right tilting operation of the head portion 1, the head portion has a skin extension structure that displaces at least one of the main blade 7 and the long hair cutting blade 8 to the skin extension position against the urging force of the return spring 71. 1 is provided.

  In the electric shaver according to the third aspect of the invention, as shown in FIG. 13, the head portion 1 includes a plurality of main blades 7, at least one main blade 7, and at least one long hair cutting blade 8, and the skin. A skin contact body 90 that is pushed down by receiving a pressing reaction force from the surface and a lift spring 95 that pushes up and biases the skin contact body 90 are provided. At least one of the main blade 7 and the long hair cutting blade 8 is supported by the head unit 1 so that it can be displaced between the reference position and the skin extension position, and is biased by the return spring 71 toward the reference position. In conjunction with the pressing operation of the skin contact body 90, a skin extension structure is provided that displaces at least one of the main blade 7 and the long hair cutting blade 8 to the skin extension position against the urging force of the return spring 71.

  As shown in FIG. 13, the skin stretching structure includes a rack 92 and a pinion 93 that convert a pressing operation of the skin contact body 90 into a rotating operation, and an operation cam 94 that rotates together with the pinion 93. At least one of the main blade 7 and the long hair cutting blade 8 is displaced to the skin extension position while resisting the urging force of the return spring 71 by the operation cam 94 to extend the skin surface.

  As shown in FIG. 15, the skin extension structure is provided on at least one of the moving cam 97 provided on the skin contact body 90 side and the main blade 7 and the long hair cutting blade 8, and is passively operated by the moving cam 97. And a cam 98. At least one of the main blade 7 and the long hair cutting blade 8 is displaced by the moving cam 97 to the skin stretch position while resisting the biasing force of the return spring 71 via the passive cam 98 to stretch the skin surface.

  In the electric shaver according to the fourth invention, as shown in FIG. 16, at least one main blade 7 and at least one long hair cutting blade 8 are disposed adjacent to the head portion 1. At least one of the main blades 7 is supported by the head unit 1 so as to be displaceable between a reference position and a skin extension position, and is biased by a return spring 71 toward the reference position. The long hair cutting blade 9 is supported so as to be vertically movable with respect to the head portion 1, and is pushed up and biased by a lift spring 72. In conjunction with the operation in which the long hair cutting blade 9 is pushed down by receiving the pressing reaction force from the skin surface, at least one of the main blades 7 is displaced to the skin extension position against the urging force of the return spring 71. Provide a skin stretch structure.

  As shown in FIG. 16, the skin stretching structure includes a rack 101 and a pinion 102 that convert a pressing operation of the long hair cutting blade 9 into a rotating operation, and an operation cam 103 that rotates together with the pinion 102. At least one of the main blades 7 is displaced to the skin extension position while resisting the urging force of the return spring 71 by the operation cam 103, and the skin surface is extended by at least one of the main blades 7.

  As shown in FIG. 17, the skin extension structure includes a fixed cam 105 provided on the head portion 1 side and a passive cam 106 provided on at least one of the main blades 7 and operated to be displaced by the fixed cam 105. Configure. At least one of the main blades 7 is displaced by the fixed cam 105 through the passive cam 106 to the skin extension position against the urging force of the return spring 71, and the skin surface is extended by at least one of the main blades 7.

  In the present invention, a skin stretching structure is provided adjacent to the main blade 7 provided in the head portion 1 to stretch the skin surface by receiving a pressing reaction force from the skin surface. In this way, when the skin surface is stretched by the skin stretching structure, the comb hair that has fallen into the skin surface can be forcibly raised and guided to the main blade 7. In addition, the skin stretching structure provided separately from the main blade 7 is displaced by the pressing reaction force from the skin surface, and the skin surface is stretched. The beard can be cut effectively. Further, it is possible to eliminate an excessive driving load from acting on the motor 10 that drives the inner blade 11, and as a whole, it is possible to effectively perform whisker cutting in a shorter time.

  A long hair cutting blade 8 is provided in the head portion 1, and the skin pressing body 35 of the skin extension structure can be operated to the operating position in conjunction with the movement of the long hair cutting blade 8 due to the pressing reaction force from the skin surface. By doing so, it is possible to effectively cut the beard while promoting the introduction of the beard by extending the skin surface without the need to move the long hair cutting blade 8 with particular awareness. It is also possible to intentionally cut the whisker while adjusting the degree of extension of the skin surface by intentionally adjusting the pressing force of the long hair cutting blade 8 against the skin surface. Since the long hair cutting blade 8 is moved in response to the pressing reaction force from the skin surface, strong stimulation (stress) is not applied to the skin surface by the long hair cutting blade 8. In addition, the short hair, long hair, or comb hair that has fallen on the skin surface is raised and cut with the main blade 7, and at the same time, the long hair cutting blade 8 pressed against the skin surface can be used to cut the beard.

  When a skin stretch structure is constituted by the skin pressing body 35 and the skin pressing spring 36 and the skin pressing portion 39 and the cutting edge portion of the long hair cutting blade 8 are arranged on the upper surface of the skin pressing body 35 sandwiching the support shaft 41 therebetween. The skin pressing body 35 can be swung around the support shaft 41 like a seesaw to press the skin pressing portion 39 against the skin surface. Further, since the skin pressing part 39 is provided on the upper surface of the skin pressing body 35 on the side close to the main blade 7, when the skin pressing body 35 swings, the skin surface facing the main blade 7 is extended by the skin pressing body 35. Accordingly, the main blade 7 can be cut while reliably raising short hair, long hair, or comb hair that has fallen into the skin surface.

  When a group of comb teeth 47 is formed on the skin pressing portion 39 of the skin pressing arm 37 constituting the skin pressing body 35 and the long hairs are swept toward the outer blade 12, the long hairs captured by the comb teeth 47 are transferred to the tip of the hair tip. By guiding the outer blade 12 from the side, it is possible to increase the chance of cutting the long hair by the main blade 7.

  Particularly, when the comb teeth 47 are formed from the upper surface of the protruding end of the skin pushing arm 37 to the exposed proximal end portion of the long hair cutting blade 8, the chance of capturing the long hairs with the comb teeth 47 is increased, and more effectively. Long hair can be cut with the main blade 7. Further, when the long hair captured by the comb teeth 47 is guided in the reverse direction toward the long hair cutting blade 8, the long hair can be accurately cut by the long hair cutting blade 8, so that the beard cutting work as a whole is performed. This can be done more effectively.

  According to the skin extension structure in which the upward skin pressing piece 48 protrudes from the upper surface near the protruding end of the skin pressing portion 39, the displacement distance of the skin pressing piece 48 when the skin pressing body 35 swings to the operating position can be increased. In addition, the skin surface can be pushed in as much as the protruding dimension of the skin pressing piece 48. Therefore, the skin surface facing the main blade 7 can be more reliably stretched by the skin pusher 35, and the comb hair and long hair falling down on the skin surface can be raised accurately.

  According to the skin extension structure in which the skin pressing body 35 is configured by the skin pressing arm 37 and the arm base 38 and a group of comb teeth 49 are formed on the upper surface on the arm base 38 side, the skin pressing body 35 is relatively moved toward the long hair cutting blade 8. The approaching long hair can be caught and swept away by the comb teeth 49. Therefore, even when the long hair is located on the front skin surface or the rear skin surface of the long hair cutting blade 8, the long hair captured by the comb teeth 49 can be reliably cut by the long hair cutting blade 8. Moreover, it can avoid that parts other than the comb tooth 49 contact a skin surface, and can make soft skin contact when the skin pressing body 35 moves relatively with a skin surface.

  When the skin pressing arm 37 is assembled to the outer blade holder 13, the outer blade 12 and the skin pressing arm 37 can be attached to and detached from the head unit 1 together with the outer blade holder 13, so the long hair cutting blade 8 incorporated in the skin pressing body 35. Or, it is easier to clean and wash the skin extension structure.

  When the slit-like long hair introduction hole 12b is formed on the peripheral surface of the outer blade 12 facing the skin pressing arm 37, the chance that the long hair guided by the comb teeth 47 of the skin pressing arm 37 is introduced into the long hair introduction hole 12b is improved. And the chance of cutting long hair by the main blade 7 can be increased. Further, since the skin surface facing the long hair introduction hole 12b is received by the skin pressing portion 39, even if the slit length and slit width of the long hair introduction hole 12b are set large, It is possible to reliably prevent the portion from sagging into the long hair introduction hole 12b.

  In the second invention, when the head unit 1 moves relative to the main body unit 2, any one of the main blade 7 and the long hair cutting blade 8 can be displaced by the skin stretching structure in conjunction with the moving operation of the head unit 1. Therefore, at the time of cutting the beard, the skin surface can be stretched by either the main blade 7 or the long hair cutting blade 8 without having to be particularly conscious, and the short hair, long hair, or comb hair that has fallen on the skin surface can be raised without fail. . When the head part 1 is pressed against the skin surface and moved and displaced, the main body 7 and the long hair cutting blade 8 are displaced to the skin stretched position by the skin stretching structure using the moving operation as a driving force, and the head part 1 falls to the skin surface. This is because it can raise short, long, or comb hair. Therefore, just by using the same method as the conventional electric shaver, it is possible to raise short hairs, long hairs, or comb hairs that stretch down the skin surface facing either the main blade 7 or the long hair cutting blade 8 and fall down on the skin surface, The beard cutting by either the main blade 7 or the long hair cutting blade 8 can be performed more effectively.

  When the skin extending structure is constituted by the rack 80 and the pinion 81 for converting the moving operation of the head unit 1 into the rotating operation, and the operation cam 82 rotating together with the pinion 81, the main blade 7 and the long hair cutting blade are configured by the rotating operation cam 82. It is possible to promote the introduction of the beard by operating any one of 8 to the skin stretching position and extending the skin surface without hindrance. Further, when the main blade 7 and the pair of main blades 7 or both of the main blade 7 and the long hair cutting blade 8 are simultaneously displaced to the skin stretching position by the skin stretching structure, both the main blades 7 or the main blade 7 and the long hairs. The cutting blade 8 can be displaced smoothly and evenly by the operation cam 82. In the third and fourth aspects of the invention, the same effect can be achieved even in the skin extension structure constituted by the rack 80, the pinion 81, the operation cam 82, and the like.

  According to the skin stretching structure constituted by the fixed cam 85 provided on the main body 2 and the passive cam 86 provided on either the main blade 7 or the long hair cutting blade 8, the skin stretching structure is configured with a smaller number of parts. Thus, an electric razor having a skin stretching function can be provided at a low cost. Durability can be improved by simplifying the skin extension structure. In the third and fourth inventions, the same effects can be achieved even in the skin stretch structure constituted by the fixed cam 85, the passive cam 86, and the like.

  In accordance with the electric razor that extends the skin surface by displacing either the main blade 7 or the long hair cutting blade 8 with the skin stretching structure in conjunction with the forward / backward tilting operation of the head portion 1, the head portion 1 changes the skin surface. Accordingly, the skin surface facing the main blade 7 and the long hair cutting blade 8 can be stretched every time it tilts back and forth. Alternatively, it is possible to intentionally tilt the head portion 1 back and forth to extend the skin surface facing the main blade 7 and the long hair cutting blade 8. Therefore, short hairs, long hairs, or comb hairs that have fallen on the skin surface facing the main blade 7 and the long hair cutting blade 8 can be raised efficiently and cut with the main blade 7 effectively.

  In accordance with the electric razor that stretches the skin surface by displacing either the main blade 7 or the long hair cutting blade 8 with the skin stretching structure in conjunction with the left-right tilting operation of the head portion 1, the head portion 1 changes the skin surface. Accordingly, the skin surface facing the main blade 7 and the long hair cutting blade 8 can be extended each time it is tilted left and right. Alternatively, the head portion 1 can be intentionally tilted left and right, and the skin surface facing the main blade 7 and the long hair cutting blade 8 can be extended. Therefore, short hair, long hair, or comb hair that has fallen into the skin surface facing the main blade 7 and the long hair cutting blade 8 can be raised more reliably and can be effectively cut with the main blade 7.

  In the third aspect of the invention, in conjunction with the skin contact body 90 provided on the head unit 1 being pushed down on the skin surface, either the main blade 7 or the long hair cutting blade 8 is displaced by the skin extension structure to thereby remove the skin surface. Since it is stretched, either the main blade 7 or the long hair cutting blade 8 can be displaced to the skin stretching position in a state where the pressing reaction force from the skin surface is received by the skin contact body 90. Therefore, it is possible to prevent the pressing reaction force from concentrating on the outer blade 66 of the main blade 7 and to eliminate the excessive driving load from acting on the motor 10 that drives the inner blade 11, thereby shortening the beard cutting in a shorter time. Can be done effectively.

  In the fourth invention, in conjunction with the long hair cutting blade 9 being pushed down on the skin surface, the main blade 7 is displaced by the skin stretching structure to stretch the skin surface. After receiving and extending with the blade 9, the skin surface can be extended again with the main blade 7. Accordingly, short hair, long hair, or comb hair that has fallen on the skin surface facing the main blade 7 can be raised more reliably, and can be effectively cut with the long hair cutting blade 9 and the main blade 7.

It is a vertical side view of the head part which shows the skin expansion | extension structure which concerns on this invention. It is a front view of an electric razor. It is a side view of a head part. It is a vertical side view of a state where the skin extension structure is at the reference position. It is a disassembled rear view of a skin extension structure. It is a disassembled side view of an outer blade holder and a skin extension structure. It is a top view of a head part and a skin extension structure. It is a vertical side view which shows the skin expansion | extension structure which concerns on 2nd invention. It is a vertical front view of the skin extending | stretching structure shown in FIG. It is a vertical side view which shows another skin expansion | extension structure which concerns on 2nd invention. It is a vertical side view which shows another skin extending | stretching structure which concerns on 2nd invention. It is a vertical side view which shows another skin extending | stretching structure which concerns on 2nd invention. It is a vertical side view which shows the skin expansion | extension structure which concerns on 3rd invention. FIG. 14 is a longitudinal front view of the skin extension structure shown in FIG. 13. It is a vertical side view which shows another skin expansion | extension structure which concerns on 3rd invention. It is a vertical side view which shows the skin expansion | extension structure which concerns on 4th invention. It is a vertical side view which shows another skin expansion | extension structure which concerns on 4th invention. It is a vertical side view which shows another Example of the skin expansion | extension structure which concerns on 2nd invention. It is a vertical front view which shows another Example of the skin expansion | extension structure which concerns on 2nd invention. FIG. 20 is a cross-sectional plan view of the skin extension structure shown in FIG. 19. It is a vertical side view which shows another Example of the skin expansion | extension structure. It is a vertical side view which shows another Example of the skin expansion | extension structure.

  1 to 7 show an embodiment of an electric shaver according to the first invention. In the following description, “front / rear / left / right / up / down” follows the crossing arrows shown in FIGS. 2 and 3 and the front / rear / left / right / upper / lower notation displayed in the vicinity of each arrow. In FIG. 2, the electric razor includes a head portion 1, a main body portion 2 that supports the head portion 1, an outer frame 3 attached to the main body portion 2, and the like. The outer frame 3 also serves as a decorative frame, and constitutes an electric razor grip portion in cooperation with the main body portion 2. The entire head unit 1 is supported by the main body unit 2 so as to be vertically movable, and is pushed up and biased by a moving spring (not shown).

  In FIG. 4, the head portion 1 is disposed on the rear side of the head blade 5, the upper cover 6 fixed to the upper surface of the head base 5, the main blade 7 provided at the upper end of the head portion 1, and the main blade 7. It comprises a skin stretching structure and a trimmer unit (long hair cutting blade) 8 incorporated in the skin stretching structure. A motor 10 is fixed to the lower surface of the head base 5, and its rotational power is transmitted to the inner blade 11 of the main blade 7 through a gear transmission structure. When the head unit 1 moves up and down with respect to the main body unit 2, the motor 10 moves along with the head unit 1.

  The main blade 7 is composed of a rotary inner blade 11 that rotates about a horizontal axis and an outer blade 12 made of a mesh blade, and mainly cuts (shears) short hairs. Similarly, the main blade 7 in the following embodiments mainly cuts short hairs. The outer blade 12 is held in an arch shape by an outer blade holder 13, and the outer blade holder 13 is detachably attached to the head base 5. The inner blade 11 is formed by inserting and fixing a group of spiral blades on a plastic shaft body, and is rotatably supported by an inverted portal inner blade holder 14. 1 and 4, the inner blade 11 is rotationally driven in the counterclockwise direction. The inner blade holder 14 can be attached to and detached from the upper cover 6. The outer blade 12 is composed of a mesh blade in which a group of whisker introduction holes 12a is formed in the entire curved region, and a slit-like long hair introduction hole 12b that is long in the front-rear direction is formed on a flat rear wall continuous to the curved wall. It is. In addition, the center part of the cutting | disconnection area | region comprised with the whisker introduction hole 12a and the inner blade 11 is deviated to the front side with respect to the vertical plane which passes along the center of the inner blade 11. FIG. More specifically, the central portion of the cutting area is located between 10:00 and 11:00 on the dial of the watch.

  Electrical components such as a secondary battery 16 and a circuit board 17 are assembled inside the main body 2 (see FIG. 2). In order to allow the head portion 1 to be washed with water, the space between the main body portion 2 that houses the motor 10 and the previous electrical component and the head base 5 is sealed with packing. A switch button 18 for switching the energization state of the motor 10 and a light emitting display unit are incorporated in the upper part of the right side frame portion of the outer frame 3. Each time the switch button 18 is pushed in, the switch mounted on the circuit board can be cyclically switched from on to off or from off to on.

  The gear transmission structure includes a front gear group that transmits the rotational power of the motor 10 to the intermediate shaft 20 and a rear gear group that transmits the rotational power of the intermediate shaft 20 to the inner blade 12. As shown in FIG. 2, the front gear group includes a driving gear 21 fixed to the output shaft of the motor 10, a driven gear 22 that meshes with the driving gear 21, and a drive-side bevel gear 23 provided on the upper surface of the driven gear 22. The driven bevel gear 24 is fixed to the intermediate shaft 20. The rear gear group includes a gear train 26 provided between the intermediate shaft 20 and the inner blade shaft 25, and only the first gear of the gear train 26 is fixed to the shaft end of the intermediate shaft 20, and the other three gears. Is accommodated in the side wall of the inner blade holder 15.

  A vibrator 28 is slidably supported by using the intermediate shaft 20, and the vibrator 28 is driven by an eccentric cam 29 provided on the upper surface of the previous driving gear 21 to reciprocate the rotational power of the motor 10. Has been converted. The reciprocating power of the vibrator 28 is transmitted to the movable blade 56 of the trimmer unit 8 through the drive frame 30 (see FIGS. 3 and 4).

  The skin stretching structure is configured by using a skin pressing body 35 disposed on the rear surface side of the outer blade holder 13 and a skin pressing spring 36 that displaces and biases the skin pressing body 35 as element members. The trimmer unit 8 is incorporated by using.

  As shown in FIGS. 4 to 6, the skin pressing body 35 extends downward continuously from the skin pressing arm 37 that continues from the side of the trimmer unit 8 toward the outer blade 12 and the rear part of the skin pressing arm 37. The arm base portion 38 is formed in an inverted L-shaped cross section, and the upper surface side of the skin pressing arm 37 is a skin pressing portion 39. The skin pressing body 35 can be swung and displaced between the standby position shown in FIG. 4 and the operating position shown in FIG. For this purpose, a pair of brackets 40 are provided on the left and right of the rear surface of the outer blade holder 13, and a pair of support shafts 41 fixed to the upper facing surfaces of both brackets 40 are used to pivotally support the front and rear middle portions of the side surface of the skin pressing arm 37. Yes.

  Further, the above-described skin pressing spring 36 is disposed between a spring receiving seat 42 provided at the upper part of both side surfaces of the arm base 38 and a spring receiving seat 43 provided at the lower part of the left and right brackets 40 (see FIG. 3). ). The skin pressing spring 36 is composed of a compression coil spring, and urges the entire skin pressing body 35 to swing around the support shaft 41 in the counterclockwise direction. The spring receiving seats 42 and 43 are provided with projecting pins 42 a and 43 a that fit into the skin pressing spring 36. The central axis of the support shaft 41 is arranged in parallel with the rotational central axis of the inner blade 11 of the main blade 7.

  As shown in FIG. 7, the left and right width of the skin pushing arm 37 is set to be slightly wider than the formation region of the beard introduction hole 12 a provided in the outer blade 12, and the left and right width of the arm base portion 38 including the spring seat 42. Is set to be larger than the lateral width of the skin pressing arm 37. A space S having a vertically penetrating shape is formed between the skin pushing arm 37 and the arm base 38, the trimmer unit 8 is fixed to a flat blade set 45 facing the space S, and the cutting blade portion is fixed to the arm base. It is exposed on the upper surface on the side 38 (see FIG. 4).

  The cross section of the front part of the skin pressing arm 37 is sharpened in the shape of an arrowhead, and a group of combs that shed long hair toward the outer blade 12 from the front end of the upper surface of the skin pressing part 39 to the exposed part of the cutting edge part. Teeth 47 are formed. Further, a saw blade-like skin pressing piece 48 protrudes upward on the front upper surface of each comb tooth 47. As shown in FIG. 7, the comb teeth 47 and the skin pressing pieces 48 are formed at regular intervals over the entire width of the skin pressing arm 37 in the left-right direction. Comb teeth 49 are also formed at regular intervals on the upper surface on the arm base 38 side facing the cutting edge portion of the trimmer unit 8. However, the adjacent pitch and the tooth width of the comb teeth 49 on the arm base 38 side are set to be approximately half of the adjacent pitch and the tooth width of the comb teeth 47 on the skin pressing arm 37 side. The width is substantially matched with the left and right width of the fixed blade 55.

  As shown in FIG. 4, the skin pressing arm 37 at the standby position has a stepped portion 50 provided on the lower surface thereof in contact with the stopper wall 51 of the outer blade holder 13. When the urging force of the skin pressing spring 36 is received by the stopper wall 51 in this way, the inclined surface 52 on the lower surface of the front end of the skin pressing arm 37 can be prevented from being strongly pressed against the flat rear wall of the outer blade 12. The tooth gap 53 between the comb teeth 47 in this state faces the long hair introduction hole 12 b of the outer blade 12. As shown in FIGS. 3 and 4, the skin pressing piece 48 when the skin pressing body 35 is in the standby position is located at the uppermost end of the skin pressing body 35, and the comb teeth 47 that are continuous to the skin pressing piece 48. The upper edge is generally horizontal.

  The trimmer unit 8 includes a fixed blade 55 that is fixed to the blade setting portion 45, a movable blade 56 that is slidably driven to the left and right with respect to the fixed blade 55, a passive body 57 that is provided integrally with the movable blade 56, and the illustration. It consists of a presser spring for a movable blade that is not. In order to drive the movable blade 56, the rear end of the drive frame 30 provided on the vibrator 28 protrudes outward from the rear surface of the head unit 1, and the drive pin 61 is fixed to the upper end of the drive piece 60 attached to the protruded end. doing. The reciprocating power of the vibrator 28 can be transmitted to the movable blade 56 by engaging the connecting groove 62 provided at the lower end of the passive body 57 with the drive pin 61.

  The trimmer unit 8 can move up and down along with the skin pressing body 35 swinging between the standby position and the operating position. Even in the state where the trimmer unit 8 is moved and displaced in this way, the drive pin 61 is protruded largely in front of the front surface of the drive piece 60 so that the reciprocating power can be transmitted to the movable blade 56 at all times. And the engagement state of the drive pin 61 can be maintained. The outer surface of the drive structure from the drive frame 30 to the passive body 57 is covered with a cover 63 attached to the rear surface of the main body 2.

  As shown in FIG. 1, the electric shaver configured as described above presses the main blade 7 against the skin surface to cut the beard. Specifically, long hairs and comb hairs can be cut by the trimmer unit 8, and the cut short hairs can be finished and cut by the main blade 7 for combi shaving. In a state where the main blade 7 is pressed against the skin surface, the cutting blade portion of the trimmer unit 8 and the upper surface of the arm base 38 are simultaneously pressed by the pressing reaction force of the skin surface. Therefore, the skin pressing body 35 swings clockwise around the support shaft 41 against the urging force of the skin pressing spring 36 and is displaced to the operating position indicated by the solid line. At the same time as the skin pressing body 35 swings, the skin pressing piece 48 bites into the skin surface, and the skin surface facing the outer blade 12 is stretched by the skin pressing piece 48 and falls down on the stretched skin surface. Short hair, long hair, or comb hair can be raised. In the process of pressing the main blade 7 against the skin surface, the trimmer unit 8 swings together with the skin pressing body, so that the skin surface is less stimulated by the fixed blade 55 and the movable blade 56, and the skin contact is made softer. can do.

  At this time, since the skin pressing piece 48 is provided near the tip of the skin pressing 39, the displacement distance of the skin pressing piece 48 when the skin pressing body 35 swings to the operating position can be increased. Furthermore, the skin surface can be pushed in largely by the dimension that the skin pressing piece 48 protrudes from the upper surface of the skin pressing 39. Therefore, the skin surface facing the main blade 7 can be greatly stretched by the skin pusher 35, and the comb hair and long hair falling down on the skin surface can be reliably raised.

  When the head portion 1 is slid in the direction of arrow M as shown in FIG. 1 in the above-described skin stretched state, the raised hairs and long hairs are guided to the long hair introduction holes 12b of the outer blade 12 while combing with the comb teeth 47. Can be cut. At the same time, short hair can be guided into the beard introduction hole 12a and cut. The operation of swinging the skin pressing body 35 to the operating position is realized by the upper surface of the arm base 38 being pressed by the pressing reaction force of the skin surface and sinking around the support shaft 41. Can be thought of as follows. The cutting blade portion of the trimmer unit 8 is exposed on the upper surface of the arm base portion 38. Therefore, it can be said that the rocking motion of the skin pressing body 35 is performed in conjunction with the downward movement and displacement of the trimmer unit 8 in response to the pressing reaction force from the skin surface.

  Examples of the electric razor according to the second to sixth inventions will be described below with reference to FIGS. In each of the following embodiments, portions different from the above-described embodiments are mainly described, and the same members are denoted by the same reference numerals and description thereof is omitted.

  8 and 9 show an electric razor according to the second invention, wherein the head portion 1 is provided with a pair of front and rear main blades 7 and 7 and a center blade (long hair cutting blade) 9, and the entire head portion 1 is shown. Was supported by the main body 2 so as to be movable up and down. The main blade 7 is configured as a reciprocating cutting blade with an inner blade 65 made of a slit blade and an outer blade 66 made of a mesh blade, and each inner blade 65 is opposite to each other by a drive shaft of a vibrator (not shown). It is driven back and forth in the direction.

  The main blade 7 is assembled to a box-shaped blade support 67 so as to be movable up and down, and is pushed up and biased by a spring 64. The front and rear blade supports 67 are supported by a head case 68 so as to be slidable back and forth. It is. Specifically, the slide pins 69 provided on the front and back of the lower surface of the blade support 67 are slidably guided and supported by guide grooves 70 formed on both side walls of the head case 68, so that the main blades 7 and 7 are positioned at the reference position (see FIG. 8 (position indicated by an imaginary line) and a skin extension position (position indicated by a solid line in FIG. 8) so as to be slidable. In addition, a return spring 71 disposed between the front and rear walls of the head case 68 and each blade support 67 urges the main blades 7 and 7 to move toward each other toward the reference position. The center blade 9 is disposed between the main blades 7 and 7 and is composed of an inner blade 73 and an outer blade 74 each formed of a slit blade. The center blade 9 is supported so as to move up and down and is urged by a lift spring 72. The inner blade 73 is reciprocally driven by a drive shaft of a vibrator (not shown). The head case 68 is supported so that the slide pin 77 of the moving body 76 fixed to the lower portion thereof is slidably guided by a guide groove 78 provided in the main body 2 and can be moved up and down, and is pushed up and biased by a moving spring 79. is there.

  In order to displace the main blades 7 and 7 from the reference position to the skin extension position in conjunction with the movement operation of the head part 1, a skin extension structure is provided in the head part 1. The skin extension structure includes a pair of left and right racks 80 fixed to the main body 2, a pinion 81 that is pivotally supported by the head case 68 and meshes with the previous rack 80, and a pair of operation cams 82 that rotate along with each pinion 81. Consists of. The operation cam 82 is formed in an oval shape, the rotation center thereof is positioned in the middle of the double blade support 67, and the opposing wall of each blade support 67 that is moved and urged by the return spring 71 is formed around the cam circumference. I take it on the surface.

  When the main blades 7 and 7 are pressed against the skin surface in use, the entire head portion 1 sinks against the urging force of the moving spring 79 due to the pressing reaction force from the skin surface. Simultaneously with this sinking operation, the pinion 81 is rotationally driven along the rack 80, and at the same time, the operation cam 82 is rotated from the state indicated by the imaginary line to the state indicated by the solid line, thereby supporting the blade supports of the main blades 7 and 7. 67 is operated to move away from each other against the biasing force of the return spring 71. Therefore, the skin surface located between the main blades 7 and 7 is stretched by the outer blades 66 and 66 that move away from each other, and short hair, long hair, or comb hair that has fallen into the skin surface is removed. Brushed. Accordingly, the user can stretch the skin surface without having to move the head unit 1 with particular awareness. By sliding the head part 1 forward or backward in this state, the raised hair can be introduced into the main blade 7 on the lower side in the sliding direction and cut. When the main blade 7 is moved away from the skin surface, the head portion 1 moves in a direction to advance from the main body portion 2 by the urging force of the moving spring 79, so that the pinion 81 and the operation cam 82 rotate while moving upward, The main blades 7 and 7 return to the standby position.

  The electric razor shown in FIG. 10 is provided with a pair of front and rear main blades 7 and 7 and a center blade 9 on the head 1 in the same manner as the electric razor shown in FIG. . The front and rear blade supports 67 are supported by the head case 68 so as to be slidable back and forth, and the return spring 71 is urged to return toward the reference position. The skin extension structure in this embodiment is composed of a pair of left and right fixed cams 85 fixed to the main body 2 and a passive cam 86 fixed to each blade support 67, and the head portion 1 is provided with a moving spring 79. When sinking against the force, both the passive cams 86 are displaced by the fixed cams 85 in the direction away from each other at the same time. The fixed cam 85 and the two passive cams 86 are in contact with each other via a cam surface formed of an inclined surface.

  The electric razor in FIG. 11 is provided with a pair of front and rear main blades 7 and 7 and a center blade 9 on the head portion 1 in the same manner as the electric razor in FIG. 8, and the entire head portion 1 is supported by the main body portion 2 so as to be vertically movable. . The front and rear blade supports 67 are configured such that a swing shaft 88 fixed to the lower part thereof is supported by a head case 68 so as to be tiltable forward and backward, and a return spring 71 is urged to return to a reference position. The skin extension structure in this embodiment is composed of a fixed cam 85 and a passive cam 86 as in the skin extension structure of FIG. 10, but the operation cam surface at the upper end of the fixed cam 85 is rounded into a semicircle. Different from the skin stretch structure of FIG.

  The electric razor shown in FIG. 12 is configured in the same manner as the electric razor shown in FIG. 11. However, the pair of main blades 7 at the front and rear thereof is a rotary type rotating around the horizontal axis in the same manner as the main blade 7 described in FIG. The point which comprises with the blade 11 and the outer blade 12 which consists of a mesh blade differs from the electric shaver of FIG.

  The electric razor according to the third invention of FIGS. 13 and 14 has a pair of front and rear main blades 7 configured in the same manner as the electric razor of FIG. 11, and uses the vertical movement of the skin contact body 90 supported by the head case 68. The skin stretch structure can be operated from the reference position to the skin stretch position. The skin contact body 90 is formed of a cap body having an opening 91 for exposing the main blade 7 and the center blade 9 on the upper surface, and its peripheral side wall is guided by the head case 68 so as to be movable up and down. It is pushed up and biased (see FIG. 14). The skin extension structure includes a pair of left and right racks 92 that are fixed to the inner surface of the upper wall of the skin contact body 90 and extend downward, a pinion 93 that is pivotally supported by the head case 68 and meshes with the previous rack 92, and accompanies each pinion 93. A pair of rotating operation cams 94 is used. The operation cam 94 is formed in an oval shape, the rotation center thereof is arranged in the middle of the double-blade support 67, and the opposing wall of each blade support 67 that is urged and moved by the return spring 71 is formed on the cam peripheral surface. I take it.

  The upper surface of the skin contact body 90 in the normal state is located in the vicinity of the top of the outer blade 66 as indicated by an imaginary line in FIG. 14, but when cutting the beard, the solid line in FIG. The rack 92 is pushed down as shown in FIG. The pinion 93 is rotated by the lowering operation of the rack 92, and at the same time, the operation cam 94 is rotated from the state indicated by the imaginary line to the state indicated by the solid line, so that the blade supports 67 of the main blades 7 and 7 are separated from each other. Tilt to the left. Thereby, the short hair, long hair, or comb hair which fell down on the skin surface can be raised.

  The electric razor shown in FIG. 15 has a pair of front and rear main blades 7 configured in the same manner as the electric razor shown in FIG. 13, and uses the vertical movement of the skin contact body 90 supported by the head case 68 to move the skin extension structure from the reference position. Enabled to move to the skin stretch position. The skin extension structure includes a pair of left and right moving cams 97 that are fixed to the inner surface of the upper wall of the skin contact body 90 and extend downward, and a passive cam 98 that is fixed to each blade support 67. When sinking against the urging force of a lift spring (not shown), both the passive cams 98 are operated to move away from each other simultaneously by the moving cams 97 so that the blade support 67 is swung open and wide. .

  In the electric razor according to the fourth invention of FIG. 16, the pair of front and rear main blades 7 is composed of a rotary inner blade 11 and an outer blade 12 made of a mesh blade, and arranged between them, like the electric razor of FIG. By using the vertical movement of the center blade 9, the skin stretching structure can be operated from the reference position to the skin stretching position. The skin extension structure includes a pair of left and right racks 101 fixed to the lower portion of the center blade 9, a pinion 102 that is pivotally supported by the head case 68 and meshes with the previous rack 101, and a pair of operation cams that rotate together with each pinion 102. 103. The operation cam 103 is formed in an oval shape, the rotation center thereof is positioned in the middle of the double-blade support 67, and the opposing wall of each blade support 67 that is moved and urged by the return spring 71 is received. Yes.

  The center blade 9 in the normal state is positioned above the main blade 7 as shown by an imaginary line in FIG. 16, but is pushed down as shown by a solid line in FIG. Then, the rack 101 accompanies and moves downward. The pinion 102 is rotated by the lowering operation of the rack 101, and at the same time, the operation cam 103 is rotated from the state indicated by the imaginary line to the state indicated by the solid line, so that the blade supports 67 of the main blades 7 and 7 are separated from each other. Tilt to the left. Thereby, the short hair, long hair, or comb hair which fell down on the skin surface can be raised.

  The electric razor in FIG. 17 has a pair of front and rear main blades 7 configured in the same manner as the electric razor in FIG. 16, and can use the vertical movement of the center blade 9 to operate the skin extension structure from the reference position to the skin extension position. I did it. The skin extension structure includes a pair of left and right fixed cams 105 that are fixed to the lower surface of the center blade 9 and extend downward, and a passive cam 106 that is fixed to each blade support 67. When sinking against the urging force, both the passive cams 98 are displaced by the fixed cam 97 in the direction away from each other at the same time, so that the blade support 67 is swung open. In each of the above embodiments, the pair of front and rear main blades 7 are simultaneously expanded using the skin extension structure. However, only one of the pair of main blades 7 can be operated using the skin extension structure to extend the skin surface. . In place of the center blade 9 in the fourth invention, a rod-shaped body having a semi-cylindrical cross section is supported so as to move up and down, and is further pushed up and biased by a spring, and the rod-shaped body is pushed down by receiving a pressing reaction force from the skin surface. The main blade 7 can be expanded using the operation performed. The rod-shaped body in that case can exhibit the same function as the skin contact body 90 described above.

  FIG. 18 shows another embodiment of the electric razor according to the second invention, in which the pair of front and rear main blades 7 are configured in the same manner as the electric razor in FIG. 15, and the head portion 1 is provided in the main body portion 2. A pair of left and right brackets 108 are supported via a support shaft 109 so as to tilt forward and backward. The skin extension structure includes an operating body 110 fixed to each bracket 108, and when the head portion 1 tilts back and forth, the blade support 67 receives the one blade support 67 with the protrusions 111 provided on the front and back of the operating body 110, and the blade support body. 67 can be swung against the urging force of the return spring 71. In this embodiment, the skin surface can be extended by swinging either the front or rear main blade 7 with the operating body 110.

  19 and 20 show still another embodiment of the electric razor according to the second invention, in which a pair of front and rear main blades 7 are configured in the same manner as the electric razor shown in FIG. 2 was supported by a support shaft 113 provided to be capable of tilting left and right. Further, slide pins 69 provided on the front and rear surfaces of the blade support 67 are slidably guided and supported by guide grooves 70 formed on both side walls of the head case 68, so that the main blades 7 and 7 are extended to the reference position and the skin extension. It supports so that it can be displaced to the position. The skin extension structure includes a hemispherical fixed cam 115 formed on the front and rear surfaces of the bracket 114 provided on the main body 2 and a passive cam 116 fixed to the opposing surface of the blade support 67 with the fixed cam 115 interposed therebetween. And consist of The passive cam 116 is formed as a concave surface having a square shape, and when the head portion 1 tilts to the left or right, the passive cam 116 is pushed away from the fixed cam 115. As a result, the skin surface can be stretched by moving the main blades 7 in directions away from each other.

  The electric razor shown in FIG. 21 has a pair of front and rear main blades 7 configured in the same manner as the electric razor in FIG. 8, and a tilting shaft 119 fixed to the lower surface of the blade support 67 by a guide groove 120 formed in the head case 68. Each blade support 67 can be tilted back and forth by guiding. The guide groove 120 is formed in a square shape with a first groove 121 inclined obliquely downward and a vertical second groove 122 extending upward continuously from the upper end of the first groove 121. The formed tilting shaft 119 is received by the second groove 122 in a normal state. Each blade support 67 is urged by a lift spring 123 disposed between the inner bottom of the head case 68 and the bottom wall of the blade support 67. The skin extension structure includes a fixed cam 124 projecting from the inner bottom of the head case 68 and a passive cam 125 provided on each blade support 67. Each blade support 67 receives a pressing reaction force on the skin surface. When sinking, each blade support 67 can be tilted away from each other to extend the skin surface.

  The electric razor shown in FIG. 22 is provided with one main blade 7 and a long hair cutting blade 9 in the head portion 1, and like the electric razor in FIG. did. The main blade 7 is configured as a reciprocating cutting blade with an inner blade 65 made of a slit blade and an outer blade 66 made of a mesh blade. The long hair cutting blade 9 is composed of an inner blade 73 and an outer blade 74 made of a slit blade, and is supported by a blade support 126 so as to be movable up and down, and is pushed up and biased by a lift spring 72. The blade 73 is reciprocally driven by a drive shaft of a vibrator (not shown). The blade support 67 of the main blade 7 and the blade support 126 of the long hair cutting blade 9 are supported by a head case 68 so that a swing shaft 88 fixed to the lower part of the blade supports 67 and 126 can be tilted back and forth, and twisted. A return spring 71 composed of a helical coil spring is used to urge the return toward the reference position. The skin extension structure in this embodiment is composed of a fixed cam 85 and a passive cam 86, similar to the skin extension structure of FIG. In this embodiment, the long hair cutting blade 9 and the main blade 7 cooperate to extend the skin surface. The long hair cutting blade 9 can be replaced with the long hair cutting blade 8 described in FIG.

  In addition to the above-described embodiments, the skin pressing spring 36, the return spring 71, and the lift springs 72 and 95 are a plate spring, a tension spring, a screw recoil spring, a spring made of rubber or sponge, or a spring using gas compressibility. Can be substituted. The skin stretching structure described with reference to FIGS. 1 to 7 can also be applied to a case where two or more main blades 7 are provided in the head unit 1. The trimmer unit 8 can be assembled so that the cutting edge portion is exposed on the rear surface of the arm base 38. Further, the trimmer unit 8 is not necessarily arranged on the skin pressing body 35, and may be arranged at a position different from the skin stretching structure.

  In the second invention to the fourth invention, the head portion 1 is provided with either the plurality of main blades 7, or at least one main blade 7 and at least one long hair cutting blade 8, but the specific arrangement thereof. The form and combination form are as follows. One main blade 7 and one long hair cutting blade 8, one main blade 7 and two long hair cutting blades 8, two main blades 7, two main blades 7 and one long hair cutting blade 8, three main blades, three or more main blades, one or more long hair cutting blades 8 and the like.

1 Head 2 Body 7 Main Blade 8 Long Hair Cutting Blade (Trimmer Unit)
9 Long hair cutting blade (Center blade)
DESCRIPTION OF SYMBOLS 11 Inner blade 12 Outer blade 13 Outer blade holder 35 Skin pressing body 36 Skin pressing spring 37 Skin pressing arm 38 Arm base 39 Skin pressing part 41 Support shaft 47 Comb tooth 48 Skin pressing body

Claims (1)

The head part (1) is provided with a main blade (7) including an inner blade (11) and an outer blade (12),
Adjacent to the main blade (7), has a skin extension structure,
The skin extension structure includes a pressing portion (39) that receives a pressing reaction force from the skin surface and moves and displaces toward the skin surface ,
A long hair cutting blade (8) is movably supported on the head (1),
The skin stretching structure includes a skin pressing body (35) supported so as to be freely displaceable,
The skin pressing body (35) is provided with a skin pressing portion (39) and a long hair cutting blade (8).
On the upper surface of the skin pressing body (35), the skin pressing portion (39) and the cutting edge portion of the long hair cutting blade (8) are arranged with the spindle (41) in between,
The skin pressing portion (39) moves and displaces upward with the support shaft (41) as a rotation axis in conjunction with the movement of the long hair cutting blade (8) that moves and displaces downward in response to the pressing reaction force from the skin surface. Electric razor featuring.

Images