JP2017127394A - Electric razor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric razor which makes a moving blade show pull-cutting action by moving backward/forward the moving blade while being reciprocated in a lateral direction with a moving blade drive structure, and which can smoothly and precisely cutting a beard.SOLUTION: On a razor head 2, a plurality of cutting blades 16-19 having fixed blade 22 and 26 and moving blades 23 and 27 is disposed. Moving blade drive structures D1, D2 reciprocate-driving the moving blades 23 and 27, is equipped with a motor 3, an action conversion structure converting the rotation force of the motor 3 into reciprocating rocking action, drive levers 55 and 56 transmitting the reciprocating rocking action to the moving blades 23, 27; and coupling pins 57-60. The driving levers 55 and 56 are disposed while intersecting a reciprocating direction of each moving blade 23, 27. At plural positions in a longitudinal direction of each drive lever 55 and 56 vertically opposite to each moving blade 23, 27, the coupling pins 57-60 are disposed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an electric razor having a plurality of cutting blades composed of a reciprocating movable blade and a fixed blade, and in particular, an electric razor configured to reciprocate while moving the movable blade with a movable blade driving structure. About.

  This type of electric razor can be found in US Pat. In this case, the vibrating electric element is reciprocally rotated by an electromagnet, and a pair of inner blades (movable blades) connected to the vibrating electric element are driven to reciprocate while partially rotating in directions opposite to each other. The rod-like vibrating electric element is pivotally supported by a bearing and a holding frame so as to be horizontally rotatable, and one end thereof is urged to rotate by a pair of springs. When an alternating current is supplied to the coil of the electromagnet, the vibrating electric element is attracted to the electromagnet and rotates against the urging force of the spring, and when the positive or negative voltage value reaches the maximum value, the vibrating electric element is Rotates to the stroke end of the reciprocating stroke. Thereafter, as the voltage value decreases, the vibrating electric element is rotated in the reverse direction by the spring, and when the voltage value becomes zero, the initial state is restored.

JP 53-115372 A (page 2, lower left column, FIG. 3)

  The electric razor of Patent Document 1 reciprocally drives a pair of inner blades while partially rotating them in opposite directions. However, since the distance from the center of rotation of the vibrating element to the left and right drive pins is equal, Therefore, it is difficult to cut the whisker effectively.

An object of the present invention is to make an electric razor that can smoothly and accurately cut a beard by moving the movable blade back and forth while reciprocating left and right with a movable blade drive structure, and exerting a cutting action on the movable blade at the time of cutting the beard. Is to provide.
An object of the present invention is to provide an electric razor that can eliminate bad skin contact caused by the back and forth movement of a movable blade and can eliminate skin flaking when cutting a beard.

  In the electric razor according to the present invention, a plurality of cutting blades 16 to 19 having fixed blades 22 and 26 and movable blades 23 and 27 are arranged on the razor head 2. As shown in FIG. 1, the movable blade drive structures D1 and D2 for reciprocally driving the movable blades 23 and 27 include the motor 3, the drive levers 55 and 56 that transmit the power of the motor 3 to the movable blades 23 and 27, and the connection. The body 57-60 is provided. The drive levers 55 and 56 are arranged so as to intersect with the reciprocating direction of the movable blades 23 and 27, and one end thereof is supported by the swinging central shafts 68 and 69 so as to be able to swing back and forth. Connection bodies 57 to 60 are arranged at a plurality of positions in the longitudinal direction of the drive levers 55 and 56 facing the movable blades 23 and 27 in the vertical direction. The distance between each coupling body 57-60 and the rocking | fluctuation center axis | shafts 68 and 69 is different, It is characterized by the above-mentioned.

  Each fixed blade 22 and 26 is formed with a blade hole for introducing a whiskers. The opening area of the blade holes of the fixed blades 22 and 26 on the side close to the swinging central axes 68 and 69 of the drive levers 55 and 56 is the fixed blade 22 far from the swinging central shafts 68 and 69 of the drive levers 55 and 56. -It is set larger than the opening area of 26 blade holes.

  The fixed blades 22 and 26 on the side close to the swinging central axes 68 and 69 of the drive levers 55 and 56 are formed by slit blades. In the present invention, the slit blade is a concept including a comb blade.

  A pair of cutting blade groups C1 and C2 composed of a plurality of cutting blades 16 to 19 are arranged on the razor head 2, and movable blade driving structures D1 and D2 are provided for the respective cutting blade groups C1 and C2. The drive lever 55 constituting the movable blade drive structure D1 of the one cutting blade group C1 and the drive lever 56 constituting the movable blade drive structure D2 of the other cutting blade group C2 are mutually connected by the movable blade drive structures D1 and D2. It swings and drives in a synchronized state in the reverse direction.

  A swing center axis 68 of the drive lever 55 constituting the movable blade drive structure D1 of the one cutting blade group C1, and a swing center axis 69 of the drive lever 56 constituting the movable blade drive structure D2 of the other cutting blade group C2. Are arranged separately with the motor 3 in between. The movable blade drive structures D1 and D2 include an operation conversion structure that converts the rotational power of the motor 3 into a reciprocating swing operation. The drive levers 55 and 56 are simultaneously oscillated in the reverse direction by the single motor 3 through the motion conversion structure.

  The motion conversion structure is composed of eccentric cams 62 and 63 fixed to the output shaft 3a of the motor 3 and cam grooves 64 and 65 formed at the swinging tips of the drive levers 55 and 56, respectively.

  One drive lever 55 and the other drive lever 56 are arranged before and after the central axis of the motor 3. At least one of the front and rear drive levers 56 is inclined with respect to the front and rear central axis of the razor head 2 orthogonal to the central axis of the motor 3 (see FIG. 15).

  A plurality of coupling bodies 57 to 60 are arranged at a plurality of locations on one drive lever 55 and the other drive lever 56, respectively. The distances from the axial centers of the swinging central axes 68 and 69 of the drive levers 55 and 56 to the centers of the individual coupling bodies 57 to 60 are made different.

  The cutting blade groups C1 and C2 include cutting blades 16 and 18 for finishing shaving and cutting blades 17 and 19 for rough shaving. The fixed blade 22 and the movable blade 23 of the cutting blades 16 and 18 for finishing shaving, and the fixed blade 26 and the movable blade 27 of the cutting blades 17 and 19 for rough shaving are supported by the razor head 2 so as to be movable up and down. The springs 31 and 77 are pushed up and biased. Fixed blade frames that support the fixed blades 22 and 26 on the left and right ends of the fixed blade 22 of the cutting blades 16 and 18 for finishing shaving and the left and right ends of the fixed blade 26 of the cutting blades 17 and 19 for rough shaving, respectively. 24 and 28 side end frames 24a and 28a are provided, and skin contact protrusions 81 to 84 projecting upward from the tops of the fixed blades 22 and 26 are provided at the upper ends of the side end frames 24a and 28a. As shown in FIG. 11, a virtual reference line P is assumed which is parallel to the reciprocating direction of the movable blades 23 and 27 and located below the sliding surface of the movable blades 23 and 27. The vertical height from the virtual reference line P to the top of the protrusions 82 and 84 on the skin provided on the fixed blade 26 of the cutting blades 17 and 19 for rough shaving is H1, and the cutting for finishing shaving from the virtual reference line P When the vertical height to the top of the skin contact protrusions 81 and 83 provided on the fixed blade 22 of the blades 16 and 18 is H2, the protrusions 81 to 84 for each skin so as to satisfy the inequality (H1> H2). Place. The vertical height from the virtual reference line P to the top of the fixed blade 22 of the cutting blades 16 and 18 for finishing shaving is H3, and from the virtual reference line P to the top of the fixed blade 26 of the cutting blades 17 and 19 for rough shaving The fixed blades 22 and 26 are arranged so as to satisfy the inequality (H3 ≧ H4) when the vertical height of H is H4.

  Skin contact inclined surfaces 85 and 86 that are inclined downward from the top to the side end portions are formed on the skin contact protrusions 81 to 84 when the razor head 2 is viewed from the front-rear direction (see FIGS. 8 and 12).

  As shown in FIG. 5 and FIG. 13, the skin contact inclined surfaces 85 and 86 are formed as inclined surfaces having a curved outer surface.

  The fixed blade frames 24 and 28 are supported by a fixed blade holder 14 that is detachably attached to the razor head 2. The inclined lower ends of the skin contact inclined surfaces 85 and 86 are positioned below the top of the holder side frame 14 a of the fixed blade holder 14.

  A holder inclined surface 94 that is inclined downward from the top side to the side end side is formed on the upper part of the holder side frame 14a when the razor head 2 is viewed from the front-rear direction. As shown in FIGS. 6 and 12, when assuming a virtual inclined surface Q that passes through the holder inclined surface 94 and extends above the fixed blade 26, the inclined surfaces 85 and 86 that contact the skin are positioned below the virtual inclined surface Q. Let

  As shown in FIG. 12 and FIG. 13, at least the side end outer surface of the fixed blade 26 is disposed at the inner corner between the side end frame 28 a of the fixed blade frame 28 and the fixed blade 26 of the cutting blades 17, 19 for rough shaving. A covering buffer 95 is formed.

  A buffer inclined surface 96 that is inclined downward toward the fixed blade 26 is formed in the buffer portion 95.

  The cutting blade 19 for rough shaving is disposed at at least one of the front end and the rear end of the razor head 2. Skin contact protrusions 84a that protrude before or after the fixed blade 26 of the cutting blade 19 are formed on the left and right side end frames 28a of the fixed blade frame 28 of the cutting blade 19 for rough shaving (see FIG. 5).

  A cutout portion 89 is formed on either one of the front and rear frames of the fixed blade holder 14 so that the skin contact protrusion 84a protrudes outside the front and rear frames (see FIG. 13).

  The spring load of the spring 31 that pushes and biases the fixed blade 26 of the cutting blades 17 and 19 for rough shaving is smaller than the spring load of the spring 31 that pushes and biases the fixed blade 22 of the cutting blades 16 and 18 for finishing shaving. Set.

  The skin contact protrusions 81 to 84 and 84a are configured by a roller 87 that is rotatable around a horizontal axis in the left-right direction (see FIG. 12).

  The peripheral surface of the roller 87 is inclined flush with the inclined surfaces 85 and 86 per skin.

  The pair of rollers 87 has conductivity. A current supply source 90 that supplies a weak current of positive polarity and negative polarity to the pair of rollers 87 is provided. The roller 87 may be entirely formed of a conductive material such as metal, or may be configured by forming a conductive film on the surface of the roller 87 formed of a plastic molded product by metal plating or sputtering. Good.

  A plurality of cutting blades 16 to 19 having fixed blades 22 and 26 and movable blades 23 and 27 are arranged on the razor head 2. The fixed blade frames 24 and 28 that support the fixed blades 22 and 26 are respectively mounted on the fixed blade support base 30, and the fixed blade support base 30 is detachably mounted on the fixed blade holder 14. As shown in FIGS. 6 to 8, the fixed blade support base 30 is provided with a pair of left and right elastically deformable detaching arms 46 and a pair of separation protrusions 47 for releasing the engagement of the arms 46. An engagement claw 50 provided on the arm 46 is engaged with an engagement recess 49 of the fixed blade holder 14. The head base 13 of the razor head 2 is provided with a pair of removal buttons 36 each having an engagement step portion 41 that engages and disengages with the engagement claw 43 of the fixed blade holder 14 attached to the head base 13. The release button 36 is moved and urged by a button spring 37 so as to be engaged with the engagement step portion 41. The inner surface of the removal arm 46 of the fixed blade support base 30 is received by a receiving wall 39 provided on the upper portion of the removal button 36, and the separation protrusion 47 protrudes outward from the upper outer surface of the removal button 36 to the fixed blade holder 14. Yes. As shown in FIG. 7, the removal button 36 is grasped by one finger, the separation protrusion 47 is grasped by the other finger, and the removal button 36 and the separation protrusion 47 are urged by the urging force of the button spring 37 and the elastic force of the removal arm 46. The fixed blade holder 14 is removed from the head base 13 by simultaneously pushing in.

  In the electric shaver according to the present invention, the movable blade drive structure D1 and D2 are configured by the motor 3, the drive levers 55 and 56 that transmit the power of the motor 3 to the movable blades 23 and 27, and the coupling members 57 to 60. . Further, the drive levers 55 and 56 are arranged in a state intersecting with the reciprocating direction of the movable blades 23 and 27, and the connecting members 57 to 60 are arranged at a plurality of positions in the longitudinal direction, whereby the plurality of movable blades 23 are arranged.・ 27 can be driven to swing at the same time. As described above, when the movable blades 23 and 27 are driven to swing by the drive levers 55 and 56, the plurality of movable blades 23 and 27 can be moved back and forth at the same time while reciprocating in the left and right directions. By making the movable blades 23 and 27 have a cutting action, the whisker can be cut smoothly and accurately. Further, the left and right strokes of the movable blades 23 and 27 driven by the drive levers 55 and 56 are made different from each other by changing the distance between each of the coupling bodies 57 to 60 and the swinging center shafts 68 and 69. . According to such movable blade drive structures D1 and D2, when the reciprocating speed of the movable blades 23 and 27 on the side with the small left and right stroke is the same as the reciprocating speed of the conventional movable blade, the movable blade on the side with the large left and right stroke The whisker can be cut effectively by increasing the reciprocating speed of 23 and 27.

  The opening area of the blade holes of the fixed blades 22 and 26 on the side close to the swinging central axes 68 and 69 is larger than the opening area of the blade holes of the fixed blades 22 and 26 on the side far from the swinging central axes 68 and 69. If set, it is possible to quickly shave by introducing more beards by the amount of the large opening area. Further, the closer to the swing center shafts 68 and 69, the greater the swing torque, so that a large amount of whiskers introduced from the fixed blades 22 and 26 can be reliably cut, and the driving load of the motor 3 can be reduced.

  When the fixed blades 22 and 26 on the side close to the swinging central axes 68 and 69 are formed with slit blades, the comb blades and long hairs are more reliably secured with the slit blades than when the fixed blades 22 and 26 are formed with mesh blades. And can be accurately introduced into the fixed blades 22 and 26. Therefore, even when the user's beard is dark or when there are many comb hairs, the beard can be cut effectively.

  A pair of cutting blade groups C1 and C2 composed of a plurality of cutting blades 16 to 19 are arranged, and a movable blade driving structure D1 and D2 are provided for each of the cutting blade groups C1 and C2. The movable blade drive structures D1 and D2 are driven to swing while being synchronized in opposite directions. As described above, when the drive levers 55 and 56 are driven to swing while being synchronized in opposite directions, vibrations when the movable blades 23 and 27 reciprocate can be canceled each other, which is uncomfortable on the skin surface. The action of vibration can be eliminated, and the whiskers can be cut more smoothly.

  The swinging center shafts 68 and 69 of the pair of drive levers 55 and 56 are separately arranged with the motor 3 in between, and the drive levers 55 and 56 are simultaneously reversed in one motor 3 through the motion conversion structure. When swinging driving is performed, the movable blades 23 and 27 of the cutting blade group C1 and C2 can be reciprocated by only one motor 3. Therefore, the structure of the movable blade drive structures D1 and D2 can be simplified and the overall cost can be reduced as compared with the case where each drive lever 55 and 56 is driven by the dedicated motor 3 respectively.

  According to the motion conversion structure constituted by the eccentric cams 62 and 63 and the cam grooves 64 and 65, the rotational power of the motor 3 is converted into a swinging motion by simply rotating the eccentric cams 62 and 63, and the drive lever 55. 56 can swing back and forth. In addition, since the eccentric cams 62 and 63 and the cam grooves 64 and 65 having a simple structure can convert the rotational power into a swing motion, the cost required for manufacturing the motion conversion structure can be reduced and the simple structure can be used for a long time. The reliability of the operation conversion function during use can be improved.

  If one of the front and rear drive levers 56 is tilted with respect to the front and rear central axis of the razor head 2 orthogonal to the central axis of the motor 3, the movement component in the front and rear direction when the drive lever 56 swings is increased. The front and rear strokes of the movable blades 23 and 27 can be increased. Further, the cutting action of the movable blades 23 and 27 can be enhanced by the amount of the large front-rear stroke of the movable blades 23 and 27, and the beard cutting can be performed more effectively.

  If the distances from the axis centers of the swinging central axes 68 and 69 of the drive levers 55 and 56 to the centers of the individual connecting bodies 57 to 60 are different, the reciprocating stroke S1 in the left-right direction of the movable blades 23 and 27 is different. Further, the front-rear movement amount T1 can be changed according to the difference in the previous distance. Therefore, whisker cutting can be performed smoothly and accurately by optimizing the arrangement positions of the movable blades 23 and 27 according to the structure of the cutting blades 16 to 19 and the difference in cutting characteristics.

  In the electric razor in which the skin contact protrusions 81 to 84 are provided on the side end frames 24a and 28a of the fixed blade frames 24 and 28, the height relationship between the skin contact protrusions 81 to 84 and the tops of the fixed blades 22 and 26 is expressed as (H1>). H2) is satisfied. Further, the height relationship between the top of the fixed blade 22 of the cutting blades 16 and 18 for finishing shaving and the top of the fixed blade 26 of the cutting blades 17 and 19 for rough shaving is made to satisfy (H3 ≧ H4). . According to such an electric razor, it is possible to control the skin surface from biting into the fixed blades 26 of the cutting blades 17 and 19 for rough shaving by the skin contact protrusions 81 to 84, so that the burden on the skin surface during shaving can be reduced. .

  When the skin contact inclined surfaces 85 and 86 are formed so as to be inclined downward from the top to the side end portions of the skin contact protrusions 81 to 84, the razor head 2 is moved while moving along the reciprocating direction of the movable blades 23 and 27. When performing, the fixed blades 22 and 26 can be smoothly sunk to soften the skin contact.

  When the skin contact inclined surfaces 85 and 86 are formed as sloping surfaces having an outwardly curved surface, the skin surface in contact with the skin contact inclined surfaces 85 and 86 smoothly slides, and the skin contact is made even softer and smoother. It can be.

  When the lower slope ends of the skin contact inclined surfaces 85 and 86 are positioned below the top of the holder side frame 14a of the fixed blade holder 14, the top of the holder side frame 14a is inclined by the skin contact inclined surfaces 85 and 86 when shaving. It is possible to prevent the inclined lower surfaces of the inclined surfaces 85 and 86 from contacting the skin surface by contacting the skin surface before the lower end. Accordingly, it is possible to prevent the lower end of the inclined surfaces 85 and 86 from touching the skin and to make the skin feel smooth.

  The slant surfaces 85 and 86 are positioned below the virtual slant surface Q passing through the holder slant surface 94 because the razor head 2 is moved along the reciprocating direction of the movable blades 23 and 27. This is because when the cutting is performed, after the holder inclined surface 94 is brought into contact with the skin surface, the inclined surfaces 85 and 86 are contacted with the skin surface. As described above, when the holder inclined surface 94 is first brought into contact with the skin surface and the skin contact inclined surfaces 85 and 86 are brought into contact with the skin surface, the fixed blades 22 and 26 are not strongly pressed against the skin surface. Thus, the skin contact at the time of shaving can be made soft and smooth.

  When the buffer portion 95 is provided at the inner corner between the side end frame 28 a of the fixed blade frame 28 and the fixed blade 26, the skin contact protrusion 84 protruding upward from the fixed blade 26 precedes the fixed blade 26. The buffer portion 95 can prevent the skin surface from being greatly recessed by hitting the skin surface. Further, since the skin surface is not greatly recessed by the skin contact protrusion 84, the skin contact during shaving can be made smooth.

  When the buffer inclined surface 96 is formed on the buffer portion 95, the area of the buffer portion 95 continuous with the skin contact protrusion 84 can be increased, and the surface change of the buffer inclined surface 96 from the skin contact protrusion 84 to the fixed blade 26 is moderated. Thus, the skin contact at the time of shaving can be made softer and smoother. When the skin surface slides from the fixed blade 26 toward the skin contact projection 84, the skin surface is smoothly guided by the buffer inclined surface 96, and the skin surface gets over the skin contact projection 84. Can be operated smoothly.

  The cutting blades 19 for rough shaving are arranged on at least one of the front end and the rear end of the razor head 2, and the fixed blades 26 of the cutting blade 19 are placed on the left and right side end frames 28 a of the fixed blade frame 28 of the cutting blade 19. A protrusion 84a per skin projecting before or after is provided. According to such an electric razor, prior to the fixed blade 26 of the cutting blade 19 made of a slit blade, the skin contact protrusion 84a is brought into contact with the skin surface so that the skin contact during shaving is further soft and smooth. can do.

  When the cut-out portion 89 for the skin contact protrusion 84a is formed on the fixed blade holder 14, the skin contact protrusion 84a contacts the skin surface before the fixed blade 26, so the fixed blade 26 contacts the skin surface first. And it can improve that skin contact worsens. Further, by providing the notch portion 89, it is possible to eliminate the interference of the fixed blade holder 14 while causing the skin contact projection 84a to contact first, and to make the razor head 2 compact.

  If the tension of the spring 31 that pushes and biases the fixed blade 26 for rough shaving is set to be smaller than the tension of the spring 31 that pushes and biases the fixed blade 22 for finishing shaving, the fixed blade 26 for rough shaving is made to have a smaller external force. The tension of the spring 31 acting on the skin surface can be reduced. Therefore, the skin surface can be prevented from being pushed back by a large force and greatly deformed into a dent, and the skin contact of the fixed blade 26 for rough shaving can be made soft and smooth.

  When the protrusion 84 on the skin is composed of a rotatable roller 87, the roller 87 rotates when the razor head 2 is slid along the skin surface, so that the razor head 2 can be moved lightly and smoothly while cutting the beard. Yes. Moreover, since the razor head 2 can be smoothly slid along the skin surface by the amount of rotation of the roller 87, shaving can be performed lightly in a shorter time.

  When the peripheral surface of the roller 87 is inclined to be flush with the inclined surface 86 that contacts the skin, the skin surface is caught on the roller 87 when the razor head 2 is moved along the central axis of the roller 87. This can be prevented by the inclined surface 86 per skin. Accordingly, when necessary, the roller 87 in contact with the skin surface is rotated to smooth the movement of the razor head 2 and the sliding movement of the skin surface in the left-right direction by the roller 87 can be eliminated.

  According to the electric shaver provided with a pair of rollers 87 having conductivity and a current supply source 90 for supplying a weak current having a different polarity to each roller 87, cutting the whiskers while applying a current stimulus to the skin surface Can do.

  According to the electric razor, the detachment button 36 for the fixed blade holder 14 is provided on the head base 13 of the razor head 2, and the detachment operation by the detach button 36 is assisted by the separation projection 47 provided on the fixed blade support base 30. The disengagement button 36 can be disengaged using both hands. Specifically, the removal button 36 is grasped by one finger, the separation protrusion 47 is grasped by the other finger, and the removal button 36 and the separation protrusion 47 are simultaneously resisted against the urging force of the button spring 37 and the elastic force of the removal arm 46. The release button 36 can be disengaged by pushing. Therefore, compared with a case where only the removal button 36 is pushed, the removal button 36 is pushed firmly and lightly while the pushing force acting on the removal button 36 is increased, and the engagement of the removal button 36 is performed. The step 41 can be detached from the engagement claw 43 and the fixed blade holder 14 can be removed from the head base 13.

It is principle explanatory drawing of the movable blade drive structure of the electric razor which concerns on Example 1 of this invention. It is a front view of the electric razor which concerns on this invention. It is a side view of a razor head. It is a top view of a razor head. It is a vertical side view of a razor head. It is a vertical front view of the principal part which shows the mounting structure of a fixed blade holder. It is a partially broken front view of the principal part which shows removal operation of a fixed blade holder. It is a disassembled sectional view which shows the mounting structure of a fixed blade holder. It is sectional drawing of a movable blade drive structure. It is explanatory drawing which shows the movement state of a movable blade. It is sectional drawing which shows the relationship between the protrusion part per skin in each cutting blade, and the height of a fixed blade. It is a vertical front view of the principal part which shows the relationship structure of a skin contact protrusion and a fixed blade holder. It is a rear view of the principal part which shows the relationship structure of a skin contact protrusion and a fixed blade holder. It is principle explanatory drawing of the movable blade drive structure of the electric razor which concerns on Example 2 of this invention. It is principle explanatory drawing of the movable blade drive structure of the electric shaver which concerns on Example 3 of this invention. It is principle explanatory drawing of the movable blade drive structure of the electric razor which concerns on Example 4 of this invention. It is principle explanatory drawing of the movable blade drive structure of the electric shaver which concerns on Example 5 of this invention. It is sectional drawing of the movable blade drive structure of the electric razor which concerns on Example 5 of this invention. It is principle explanatory drawing of the movable blade drive structure of the electric shaver which concerns on Example 6 of this invention. It is principle explanatory drawing of the movable blade drive structure of the electric razor which concerns on Example 7 of this invention. It is sectional drawing of the movable blade drive structure of the electric shaver which concerns on Example 7 of this invention. It is sectional drawing of the skin contact protrusion of the electric razor which concerns on Example 8 of this invention. It is principle explanatory drawing of the movable blade drive structure of the electric shaver which concerns on Example 9 of this invention. It is sectional drawing which shows the principle structure of the movable blade drive structure of the electric shaver which concerns on Example 10 of this invention.

Example 1 FIGS. 1 to 13 show Example 1 of an electric shaver according to the present invention. In the present invention, “front / rear”, “left / right”, and “upper / lower” follow the crossing arrows shown in FIG. 2 and FIG. 2 and 3, the electric razor includes a main body case 1 that also serves as a grip, and a razor head 2 that is supported by the main body case 1 so as to be vertically movable and horizontally tiltable. In the main body case 1, electrical components such as a motor 3, a secondary battery 4, and a control board 5 are arranged. The control board 5 is mounted with a switch for switching the energization state of the motor 3 and an LED 6 for displaying the remaining battery level. On the front surface of the main body case 1, a switch button 8 for switching the previous switch is disposed. As shown in FIG. 3, the shaving blade 9 and a slide knob 10 that pushes the shaving blade 9 up to the driving position are provided on the rear surface side of the main body case 1. In this embodiment, an electric razor in which the razor head 2 is supported by the main body case 1 so as to be movable up and down and tilted left and right will be described. However, the razor head 2 may be fixed to the main body case 1. 1 and 2, reference numeral 3 a denotes an output shaft of the motor 3.

  As shown in FIG. 3, the razor head 2 is configured with a head base 13 and a fixed blade holder 14 detachably attached to the base 13 as a base. The head base 13 is a motor holder (not shown). Fastened to the case body 15 fixed to the A float structure is provided between the lower part of the motor holder and the main body case 1 so as to support the razor head 2 so that it can move up and down and tilt left and right. The fixed blade holder 14 includes a first main blade (cutting blade) 16 for finishing shaving, a center blade (cutting blade) 17 for rough shaving, and a second main blade (cutting blade) for finishing shaving in order from the front side. 18 and a sub-blade (cutting blade) 19 for rough shaving are arranged.

  As shown in FIG. 4, each of the main blades 16 and 18 includes a fixed blade (outer blade) 22 made of a mesh blade and a movable blade (inner blade) 23 made of a slit blade slidably contacting the inner surface of the fixed blade 22. , Mainly finishing and cutting short hair. The fixed blade 22 is fixed to the fixed blade frame 24 and curved in an inverted U shape, and the movable blade 23 is fixed to the movable blade frame 25 and curved in an inverted U shape. The 1st main blade 16 and the 2nd main blade 18 become the same magnitude | size, and there is no difference in both external dimensions.

  Each of the center blade 17 and the sub blade 19 includes a fixed blade 26 formed of a slit blade and a movable blade 27 formed of a comb blade that is in sliding contact with the inner surface of the fixed blade 26, and mainly cuts long hairs and wrinkles. The fixed blade 26 is supported by a fixed blade frame 28, and the movable blade 27 is supported by a movable blade frame 29. The fixed blade frames 24 and 28 are assembled to the fixed blade support base 30. The fixed blade frames 24 and 28 in this state are pushed up and biased by a fixed blade spring (spring) 31 (see FIG. 5) disposed between the fixed blade support base 30 and the fixed blade frames 24 and 28. The slide pieces 32 provided at the left and right ends of the fixed blade frames 24 and 28 are received by the upper ends of the guide grooves 33 provided in the fixed blade support base 30 (see FIG. 6). Therefore, the fixed blade 26 and the fixed blade frames 24 and 28 sink into the fixed blade support base 30 when receiving a pressing reaction force from the skin surface. The spring load of the fixed blade spring 31 that pushes up and biases the fixed blade 26 of the center blade 17 and the sub blade 19 is set smaller than the spring load of the fixed blade spring 31 that pushes up and biases the fixed blade 22 of each main blade 16, 18. Has been. This is to make the fixed contact 26 of the center blade 17 and the sub blade 19 easier to sink than the fixed blades 22 of the main blades 16 and 18 so that the skin contact is soft.

  Each of the fixed blades 22 and 26 is formed with a blade hole for introducing a whiskers (including a slit), and the opening area of each of the center blade 17 and the sub blade 19 is defined as the first main blade 16 and the second blade. The opening area of each blade hole of the main blade 18 is made larger to facilitate introduction of a larger amount of whiskers. In particular, the opening area of each blade hole of the sub blade 19 arranged at the rear end of the razor head 2 is the largest compared to the opening area of each blade hole of other cutting blades, and long hair and comb hair are effective. Introduced to the shave and can shave quickly.

  As shown in FIGS. 6 to 8, on the left and right sides of the head base 13, detachable buttons 36 that hold the fixed blade holder 14 attached to the head base 13 so as not to be separable are assembled so as to be slidable left and right. Thus, it is pushed and biased in a direction to engage with the engaging step portion 41. The release button 36 includes a button main body 38, a vertical receiving wall 39 provided on the upper portion of the button main body 38, an engagement claw 40 provided on the lower portion of the button main body 38, and an engagement step provided on the front and rear of the button main body 38. It consists of the plastic molded product which provided the part 41 integrally. An engagement groove 42 corresponding to the engagement claw 40 is formed in the head base 13, and an engagement claw 43 corresponding to the engagement step portion 41 is formed on the inner surface of the holder side frame 14 a of the fixed blade holder 14. ing. The button main body 38 and a separation protrusion 47 described later protrude outward from the operation window 44 provided on the holder side frame 14a (see FIG. 6). In the case of an electric razor in which the razor head 2 is fixed to the main body case 1, the portion corresponding to the head base 13 is a structure on the main body case 1 side to which the fixed blade holder 14 is attached.

  The fixed blade support base 30 is formed of a horizontally long rectangular frame body, and an inverted J-shaped detachable arm 46 which is elastically deformable is integrally provided on the left and right side end frames 30a. A circular separation protrusion 47 projects outward. An escape recess 48 for the receiving wall 39 is formed on the outer side surface of the side end frame 30a, and the previous guide groove 33 is formed before and after the side end frame 30a. An engagement claw 50 that engages with an engagement recess 49 that is recessed in the inner surface of the side end frame 14 a of the fixed blade holder 14 is formed on the outer surface of the removal arm 46.

  The fixed blade support base 30 is assembled with the fixed blade frame 24 of each main blade 16, 18 and the fixed blade frame 28 of the center blade 17 and the sub blade 19, and the fixed blade support base 30 in this state is attached to the inner surface of the fixed blade holder 14. The fixed blades 22, 22, 26, and 26 can be integrated with the fixed blade holder 14 by assembling to the fixed blade holder 14 from the lower surface side. In this state, as shown in FIG. 6, the engagement claw 50 of the removal arm 46 is engaged with the engagement recess 49 on the inner surface of the fixed blade holder 14. Further, when the fixed blade holder 14 to which the fixed blade support base 30 is assembled is assembled to the head base 13, the engagement claw 43 of the fixed blade holder 14 is engaged with the engagement step portion 41 of the removal button 36 as shown in FIG. And is held and fixed inseparably. Further, the lower inner surface of the removal arm 46 is received by the receiving wall 39 of the removal button 36.

  When removing the shavings inside the razor head 2 or replacing the main blades 16, 18 and the center blade 17 and the sub blade 19 after the end of their service life, the removal button 36 and the separation protrusion 47 are operated simultaneously. Then, the fixed blade holder 14 is removed from the head base 13. Specifically, as shown in FIG. 7, the removal button 36 is grasped with one thumb and forefinger, and the separation protrusion 47 is grasped with the other thumb and forefinger to resist the urging force of the button spring 37 and the elastic force of the removal arm 46. Then, both 36 and 47 are pushed in at the same time. At this time, the pushing force applied to the separation protrusion 47 acts on the removal button 36 via the receiving wall 39. Therefore, the removal button 36 is securely and lightly pushed in a state where the pushing force acting on the removal button 36 is approximately doubled as compared with the case where only the removal button 36 is pushed. The fixed step holder 14 can be detached from the head base 13 by detaching the engaging step 41 from the engaging claw 43.

  As described above, in the state where the fixed blade holder 14 is removed, the inside of the razor head 2 is opened, so that it is possible to clean and remove fouling or replace all the movable blades 23, 23, 27 and 27. it can. Further, by pressing the pair of separation protrusions 47 while holding the fixed blade holder 14, the fixed blade support base 30 is removed from the fixed blade holder 14, and the fixed blade support base 30 and the fixed blades 22, 26 are removed. It can be cleaned and replaced.

  A movable blade drive structure between the motor 3 and the movable blades 23 and 27 for reciprocally driving the main blades 16 and 18 and the total four movable blades 23 and 27 of the center blade 17 and the sub blade 19 left and right and front and rear. Is provided. In this embodiment, the first main blade 16 and the center blade 17 constitute a front cutting blade group C1, the second main blade 18 and the sub blade 19 constitute a rear cutting blade group C2, and each cutting blade group The movable blade drive structures D1 and D2 are provided for each of C1 and C2. 1 and 9, the movable blade drive structure D1 and D2 includes a motor 3, a cam structure (motion conversion structure) disposed between the motor 3 and the movable blades 23 and 27, drive levers 55 and 56, and a drive lever. It is composed of four connecting pins (connectors) 57, 58, 59, 60, etc. that transmit the swinging motion of 55, 56 to the movable blades 23, 27. The cam structure is composed of eccentric cams 62 and 63 fixed to the output shaft 3a of the motor 3 and cam grooves 64 and 65 formed at the swinging tips of the drive levers 55 and 56, respectively.

  As shown in FIG. 1, the drive lever 55 of the movable blade drive structure D1 corresponding to the front cutting blade group C1 is disposed on the front side of a vertical plane that passes through the central axis of the motor 3 and extends to the left and right, and its front end swings. The moving center shaft 68 is pivotally supported so that it can swing left and right. Further, the drive lever 56 of the movable blade drive structure D2 corresponding to the rear cutting blade group C2 is disposed on the rear side of a vertical plane that passes through the central axis of the motor 3 and extends to the left and right, and its rear end is a swinging central axis. 69 is pivotally supported so that it can swing left and right. The swing center shafts 68 and 69 are fixed to a pair of front and rear brackets 70 and 70 provided on the head base 13. As shown in FIG. 9, passive arms 71 and 72 are provided at the swinging tips of the pair of drive levers 55 and 56, respectively, and the eccentric cams 62 and 63 are connected to the plate surfaces of the passive arms 71 and 72, respectively. Engaging cam grooves 64 and 65 are formed. The passive arms 71 and 72 are provided adjacent to each other with a vertical interval on the central axis of the motor 3. Thus, the movable blade drive structure D1 and the movable blade drive structure D2 use the motor 3 as a common drive source, and reciprocally drive the four movable blades 23 and 27 with only one motor 3.

  Connecting pins (connectors) 57 and 58 for transmitting the reciprocating motion of the lever 55 to the movable blades 23 and 27 of the first main blade 16 and the center blade 17 are fixed to the front drive lever 55 at a predetermined interval. Has been. The rear drive lever 56 has connecting pins (connectors) 59 and 60 for transmitting the reciprocating motion of the lever 56 to the movable blades 23 and 27 of the second main blade 18 and the sub blade 19 at a predetermined interval. It is fixed with a gap. Thus, by changing the arrangement positions of the connecting pins 57 to 60, the front-rear distance between the connecting pins 57 and 58 and the swinging center shaft 68 is different, and the connecting pins 59 and 60 and the swinging center shaft are different. The front-rear distance between 69 will be different. As shown in FIG. 5, the upper ends of the connection pins 57 to 60 are engaged with connection holes 73 to 76 provided in the movable blade frames 25, 25, 29, and 29. A movable blade spring (spring) 77 that pushes and urges the blades 23 and 27 toward the fixed blades 22 and 26 is disposed. The spring load of the movable blade spring 77 that pushes and biases the movable blade 27 of the center blade 17 and the sub blade 19 is set smaller than the spring load of the movable blade spring 77 that pushes and biases the movable blade 23 of each main blade 16 and 18. Has been. Thereby, the fixed blade 26 of the center blade 17 and the sub blade 19 can be easily sunk more than the fixed blade 22 of each main blade 16 and 18, and the skin contact can be made soft. Of the constituent parts of the movable blade driving structures D1 and D2, members other than the motor 3 are housed inside the case body 15 and sealed with a packing (not shown) that seals the upper surface of the case body 15. Only the connecting pins 57, 58, 59 and 60 penetrate the packing, and transmit the swinging motion of the drive levers 55 and 56 to the movable blades 23 and 27, respectively.

  At the time of shaving, the drive lever 55 of the front movable blade drive structure D1 and the drive lever 56 of the rear movable blade drive structure D2 are simultaneously driven by motor power to swing the four movable blades 23 and 27. Reciprocating drive. At this time, since the rotation direction of the motor 3 is one direction (clockwise rotation direction in FIG. 1), the drive levers 55 and 56 in the drive structures D1 and D2 swing in a state of being synchronized in opposite directions. The movable blades 23 and 27 of the front cutting blade group C1 and the movable blades 23 and 27 of the rear cutting blade group C2 are driven to reciprocate in opposite directions. Therefore, it is possible to cancel the vibrations when the front and rear movable blades 23 and 27 are reciprocated to cancel each other and to apply an unpleasant vibration to the skin surface, and to cut the beard more smoothly.

  Moreover, as shown in FIG. 10, each movable blade 23 and 27 moves back and forth slightly while reciprocating left and right with respect to the corresponding fixed blade 22 and 26. Therefore, the movable blades 23 and 27 can perform the beard cutting smoothly and accurately by exerting a cutting action on the whiskers captured by the fixed blades 22 and 26. Further, in the front cutting blade group C1, the front and rear distances from the center of the swing center shaft 68 of the drive lever 55 to the centers of the connecting pins 57 and 58 are different. The left and right reciprocating strokes S1 and the forward / backward movement amount T1 are smaller than the left and right reciprocating strokes S2 and the forward / backward movement amount T2 of the movable blade 27 on the side far from the swinging central axis 68. A similar difference occurs in the rear cutting blade group C2.

  Specifically, in the front cutting blade group C1, the left and right stroke S2 and the back-and-forth movement amount T2 of the movable blade 27 of the center blade 17 and the reciprocating speed are the left and right stroke S1 and the back-and-forth movement amount of the movable blade 23 of the first main blade 16. It becomes larger than T1 and the reciprocating speed. Therefore, after effectively cutting long hairs and wrinkles with the center blade 17, it is possible to effectively finish and cut short hairs with the main blades 16 and 18 adjacent to the front and rear. Further, in the rear cutting blade group C2, the left / right stroke S2 and the back-and-forth movement amount T2 and the reciprocating speed of the movable blade 23 of the second main blade 18 are the same as the left / right stroke S1 and the back-and-forth movement amount of the movable blade 27 of the sub blade 19. It becomes larger than T1 and the reciprocating speed. The distance between the center of the connecting pin 60 that drives the movable blade 27 of the sub blade 19 and the swinging center shaft 69 in the rear cutting blade group C2 is the same as that of the connecting pin 59 that drives the movable blade 23 of the second main blade 18. It is smaller than the center-to-center distance of the moving center shaft 69. Therefore, a larger swinging torque acts on the movable blade 27 of the sub blade 19 than the movable blade 23 of the second main blade 18. Therefore, it is possible to effectively cut the long hair and the comb hair captured by the fixed blade 26 of the sub blade 19 having a large opening area of the blade hole, and to efficiently perform the beard cutting.

  The electric razor configured as described above has poor skin contact because the fixed blades 26 of the center blade 17 and the sub blade 19 are configured as slit blades, and has a smoother skin contact feeling than the fixed blade 22 having a mesh blade structure. Is difficult to obtain. Moreover, since all the movable blades 23 and 27 vibrate back and forth, there is a tendency that a tingling sensation tends to occur after shaving. In order to improve such a feeling of use and obtain a smooth touch feeling, each of the left and right ends of the fixed blades 22 of the main blades 16 and 18 and the left and right ends of the fixed blades 26 of the center blade 17 and the sub blade 19 are respectively Protrusions 81 to 84 per skin are provided. Specifically, in the fixed blade frame 24 that supports the fixed blades 22 of the main blades 16 and 18, the skin contact protrusions 81 that protrude upward from the tops of the fixed blades 22 at the upper ends of the left and right side end frames 24a. 83 is provided. Further, in the fixed blade frame 28 that supports the fixed blade 26 of the center blade 17 and the sub blade 19, skin contact protrusions 82 and 84 that protrude upward from the top of each fixed blade 26 are formed on the upper ends of the left and right side end frames 28 a. Provided.

  The above dimensional relationship is arranged as shown in FIG. First, a virtual reference line P is assumed that is parallel to the reciprocating direction of the movable blades 23 and 27 and located below the sliding surface of the movable blades 23 and 27. The vertical height from the virtual reference line P to the top of the skin-projecting protrusions 82 and 84 provided on the center blade 17 for rough shaving and the fixed blade 26 of the sub blade 19 is H1, and finishing shaving from the virtual reference line P. When the vertical height to the top of the skin contact projections 81 and 83 provided on the fixed blades 22 of the first and second main blades 16 and 18 is H2, the inequality (H1> H2) is satisfied. The protrusions 81 to 84 for each skin are disposed on the skin. The vertical height from the virtual reference line P to the top of the fixed blade 22 of the first and second main blades 16 and 18 for finishing shaving is H3, and the center blade 17 for rough shaving from the virtual reference line P and When the vertical height of the sub blade 19 to the top of the fixed blade 26 is H4, the fixed blades 22 and 26 are arranged so as to satisfy the inequality (H3 ≧ H4). The vertical height H3 from the virtual reference line P to the top of the fixed blade 22 of the first and second main blades 16 and 18 for finishing shaving is the first and second heights for finishing shaving. The vertical height H2 to the top of the skin contact projections 81 and 83 provided on the fixed blade 22 of the main blades 16 and 18 is set slightly smaller (H2> H3).

  As described above, when the skin contact protrusions 82 and 84 protrude above the skin contact protrusions 81 and 83 and the top of the fixed blade 22 is positioned above the top of the fixed blade 26, the skin surface is centered. It is possible to eliminate the first contact with the fixed blade 26 of the blade 17 and the sub blade 19 and to prevent the skin surface from greatly falling into the slit of the latter fixed blade 26. Therefore, it is possible to eliminate the occurrence of tingling after shaving by making the skin contact feeling smooth when shaving.

  During normal shaving, the razor head 2 is moved in the front-rear direction perpendicular to the reciprocating direction of the movable blades 23 and 27, while the razor head 2 is moved along the reciprocating direction of the movable blades 23 and 27. A beard cut may be performed. In such a case, in order to smoothly sink each of the fixed blades 22 and 26 and soften the skin contact, the skin contact protrusions 81 to 84 when the razor head 2 is viewed from the front-rear direction, The skin contact inclined surfaces 85 and 86 which incline downward over the end portions are formed. In this embodiment, the skin contact inclined surface 85 provided on the first main blade 16, the center blade 17, and the second main blade 18 is formed in a downward inclined shape from the top to the side end, and the upper and lower ends thereof are rounded. I did it.

  As shown in FIG. 12, the skin contact inclined surface 86 of the sub-blade 19 is formed by an outwardly curved curved inclined surface, and the metal roller 87 disposed in the right and left central groove 80 has a skin contact protrusion. It was made to function as 84. The roller 87 is pivotally supported by a pin 88 so as to be rotatable about a horizontal axis, and its peripheral surface is flush with an inclined surface 86 having a curved outer surface. As shown in FIG. 13, roller windows (notches) 89 are formed on the left and right sides of the rear frame of the fixed blade holder 14 in order to project the rear peripheral surface of the roller 87 toward the rear surface side of the fixed blade holder 14. . As shown in FIG. 5 and FIG. 11, the skin contact protrusion 84 a composed of the rear peripheral surface and the inclined surface 86 of the roller 87 protrudes rearward from the rear surface of the fixed blade 26. The rear peripheral surface 87 and the inclined surface 86 can be brought into contact with the skin surface first, so that the skin surface is not directly pressed against the slit of the fixed blade 26 and the skin contact of the sub blade 19 can be made soft. . A current supply source 90 is provided in the body case 1 to supply a weak current of positive and negative polarity to the skin surface using the roller 87, and the lead wire 91 led out from the current supply source 90 is connected to the pin 88. Connected. The weak current is output to the roller 87 via the pin 88 when the motor 3 is in an operating state, and gives a current stimulus to the skin surface.

  The inclined lower ends of the skin contact inclined surfaces 85 and 86 are positioned below the top of the holder side frame 14 a of the fixed blade holder 14. This is to prevent the lower end of the inclined surfaces 85 and 86 from touching the skin and to make the skin feel smooth. As shown in FIGS. 6 and 12, a holder inclined surface 94 that is inclined downward from the top side to the side end side is formed on the upper part of the holder side frame 14a when the razor head 2 is viewed from the front-rear direction. Yes. Assuming a virtual inclined surface Q that passes through the holder inclined surface 94 and extends above the fixed blades 22 and 26, the previous skin contact inclined surfaces 85 and 86 are positioned below the virtual inclined surface Q. This is to prevent the skin contact inclined surfaces 85 and 86 protruding above the holder side frame 14a from hitting the skin surface before the holder inclined surface 94 and smoothing the skin contact feeling.

  Since the skin contact protrusions 82 and 84 described above protrude upward from the fixed blade 26 of the center blade 17 and the sub blade 19, the skin contact protrusions 82 and 84 hit the skin surface prior to the fixed blade 26. There is a risk that the skin surface will be greatly dented. In order to avoid such a situation, a buffer portion 95 that covers the outer surface of the side edge of the fixed blade 26 is formed at the inner corner between the side edge frame 28a of the fixed blade frame 28 of the center blade 17 and the sub blade 19 and the fixed blade 26. doing. As shown in FIGS. 12 and 13, the buffer portion 95 is formed with a buffer inclined surface 96 inclined downward from the skin contact projection 84 toward the fixed blade 26, and the inclined surface 96 is formed on the fixed blade 26. It is formed from the front upper corner to the rear surface through the upper surface.

  According to the electric shaver configured as described above, the movable blades 23 and 27 of the four cutting blades 16 to 19 are driven back and forth and back and forth by the movable blade drive structures D1 and D2, so The cutting action can be exerted on the blades 23 and 27 so that the whisker can be cut smoothly and accurately. Further, the skin contact protrusions 81 to 84 are provided on the side end frames 24 a and 28 a of the fixed blade frames 24 and 28 of the cutting blades 16 to 19, and the skin surface bites into the fixed blade 26 of the center blade 17 and the sub blade 19. Therefore, the burden on the skin surface when shaving can be reduced. Furthermore, since the skin surface is received by the projecting portions 81 to 84 and the skin surface can be prevented from being strongly pressed against the fixed blade 26 of the cutting blades 17 and 19 for rough shaving, the movable blades 23 and 27 vibrate back and forth. As a result, the tingling feeling after shaving can be eliminated, the feeling of using an electric razor can be improved as a whole, and a smooth skin contact feeling can be obtained.

Hereinafter, another embodiment of the movable blade driving structure and another embodiment of the skin contact protrusion will be described. In each embodiment, the structure and function different from those in the first embodiment are mainly described, and the same members are denoted by the same reference numerals and the description thereof is omitted.
(Example 2) FIG. 14: shows Example 2 which changed cutting blade group C1 * C2 and movable blade drive structure D1 * D2. In this case, the front cutting blade group C1 is composed of three cutting blades 16, 17 and 20, and the rear cutting blade group C2 is composed of two cutting blades 18 and 19. Further, the distance L2 between the centers of the three connecting pins 57, 58 and 61 fixed to the driving lever 55 on the front side, and the center of the connecting pin 57 closest to the center shaft 68 and the center of the front swinging central shaft 68. The distance L1 was set to be the same. When the center distances L1 and L2 are 1, the center distance L3 of the two connecting pins 59 and 60 fixed to the rear drive lever 56 is 1.2, and the center of the rear swing center shaft 69 is set. The distance L4 between the centers of the connecting pins 60 closest to the central axis 69 is 1.5.

  As described above, if the center-to-center distances L1 to L4 of the connecting pins 57 to 61 and the like corresponding to the cutting blades 16 to 20 are different from each other, depending on the distance from the swing center shafts 68 and 69, The left and right stroke S and the forward / backward movement amount T, the reciprocating speed, and the swing torque of the movable blades 23 and 27 can be varied. As described above, in the second embodiment, the connection positions of the connection pins 57 to 61 are made different, so that the connection pins 57, 58, 61, 59, 60 and the swing center shaft 68 of the front and rear drive levers 55, 56 are arranged. The front and rear distances were all different so that the drive positions of the five movable blades 23 and 27 were different. In FIG. 14, the front cutting blade group C1 is composed of cutting blades 16 and 20 consisting of two main blades and a cutting blade 17 consisting of a center blade arranged between them. The combination can be freely changed as necessary. For example, the front cutting blade group C1 may be configured with only three main blades. Similarly, the rear cutting blade group C2 may be composed of only two main blades or only two sub blades, and the same applies to the following embodiments.

(Example 3) FIG. 15: shows Example 3 which changed cutting blade group C1 * C2 and movable blade drive structure D1 * D2. Here, the front cutting blade group C1 and the rear cutting blade group C2 are configured in the same manner as in the first embodiment, but the rear drive lever 56 is arranged at the front-rear center of the razor head 2 orthogonal to the central axis of the motor 3. The point which makes it incline with respect to an axis | shaft differs from the movable blade drive structure D2 of Example 1. FIG. An eccentric cam 62 for driving the front drive lever 55 is provided on the upper side, and an eccentric cam 63 for driving the rear drive lever 56 is provided on the lower side. In the movable blade drive structures D1 and D2 of the first and second embodiments, the razor head 2 in which the cam centers of the eccentric cams 62 and 63 and the shaft center of the output shaft 3a of the motor 3 are orthogonal to the center axis of the motor 3 is used. The front and rear drive levers 55 and 56 are linearly overlapped along the front and rear central axis of the razor head 2. However, in the third embodiment, the front and rear drive levers 55 and 56 do not overlap linearly along the front and rear central axes of the razor head 2.

  As described above, when the center position of the swing center shaft 69 of the rear drive lever 56 is shifted to the left or right with respect to the center position of the front swing center shaft 68, the rear drive lever 56 The longitudinal movement amount T of the movable blades 23 and 27 driven by can be made larger than the longitudinal movement amount T of the movable blades 23 and 27 driven by the front drive lever 55. On the other hand, when the center-to-center distances from the swing center shafts 68 and 69 to the connecting pins 57 to 60 are set under the same conditions, the left and right sides of the movable blades 23 and 27 driven by the rear drive lever 56 are used. The stroke S is smaller than that on the front side.

(Example 4) FIG. 16: shows Example 4 which changed movable blade drive structure D1 * D2. In this case, when the center position of the front and rear swing center axes 68 and 69 is on the front and rear center axis of the razor head 2, the center position of the motor 3 is shifted to the side of the front and rear center axis of the razor head 2 to Each of the drive levers 55 and 56 is inclined with respect to the longitudinal center axis of the razor head 2. In this case, the operation characteristics of the movable blades 23 and 27 of the front cutting blade group C1 and the operation characteristics of the movable blades 23 and 27 of the rear cutting blade group C2 are the same, and the drive lever in each drive structure D1 and D2 55 and 56 are driven to swing while being synchronized in opposite directions.

(Example 5) FIGS. 17 and 18 show Example 5 in which the cutting blade group C1 and the movable blade drive structure D1 are changed. In this case, only one cutting blade group C1 is provided on the razor head 2. The cutting blade group C1 is composed of the main blade 18 and the sub blade 19, and the fixed blade 26 on the side close to the swinging central axis 69 of the drive lever 56 is formed by a slit blade. Further, the opening area of each blade hole of the fixed blade 26 on the side close to the swinging center axis 69 is set larger than the opening area of each blade hole of the fixed blade 22 far from the swinging center axis 69. In this way, by forming the fixed blade 26 with a slit blade and further setting the opening area of each blade hole to be larger, it is possible to introduce more long hairs and comb hairs and perform early shaving. Further, since the opening area of each blade hole of the fixed blade 26 on the side close to the swinging central axis 69 is set large, even when more long hairs or comb hairs are introduced into the blade hole, the moment arm of the drive lever 56 By reducing the load, the load on the motor 3 can be reduced. The movable blade drive structure D1 is formed on the drive lever 56, the two connecting pins 59 and 60 fixed to the lever 56, the eccentric cam 63 fixed to the output shaft 3a of the motor 3, and the lower surface of the drive lever 56. The cam groove 65 is used. The center position of the motor 3 is positioned at the front and rear center of the front and rear connecting pins 59 and 60. The front and rear movable blades 23 and 27 in this embodiment reciprocally swing in synchronization with the drive lever 56 in the left-right direction, but the swing stroke of the rear movable blade 27 compared to the front movable blade 23. Becomes smaller.

(Example 6) FIG. 19 shows Example 6 which changed cutting blade group C1 * C2 and movable blade drive structure D1 * D2. In this case, the front cutting blade group C1 is composed of three cutting blades 16, 17, 20 and the rear cutting blade group C2 is composed of three cutting blades 18, 19, 21. Only one drive lever 55 is provided in a state orthogonal to all the cutting blades 16 to 21, and the front and rear central portions thereof are pivotally supported so that the seesaw can be swung by the support shaft 101. Further, a cam groove 102 and an eccentric cam 103 that drives the groove 102 are provided on the lower surface of the rear portion of the drive lever 55, and the eccentric cam 103 is rotationally driven by the motor 3. The center-to-center distance L1 between the support shaft 101 and the connecting pins 61 and 59 adjacent to the coaxial 101 is the same as the center-to-center distance L1 between the connecting pins 57 to 61 and 66 adjacent to the front and rear. In this embodiment, the movable blades 23 and 27 of the front cutting blade group C1 and the movable blades 23 and 27 of the rear cutting blade group C2 reciprocally swing in opposite directions.

(Example 7) FIGS. 20 and 21 show Example 7 in which the movable blade drive structures D1 and D2 are changed. In this case, the front cutting blade group C1 is composed of two cutting blades 16 and 17, and the rear cutting blade group C2 is composed of two cutting blades 18 and 19. Further, the front drive lever 55 and the rear drive lever 56 are pivotally supported by a support shaft 101 provided between the front and rear cutting blade groups C1 and C2, and the drive levers 55 and 56 are respectively supported. The dedicated motor 3 can be driven to swing with the same cam structure as in the fifth embodiment. In this case, the movable blade drive structures D1 and D2 respectively drive the drive levers 55 and 56 by the dedicated motors 3 and 3, respectively. The reciprocating speed of the movable blades 23 and 27 of the cutting blade group C1 and C2 can be freely adjusted.

(Example 8) FIG. 22: shows Example 8 which changed the protrusion part per skin. In this case, the roller 87 is accommodated in the concave portion 106 formed on the skin contact inclined surface 86, and its upper peripheral surface protrudes upward from the skin contact inclined surface 86. However, as in the first embodiment, the upper peripheral surface of the roller 87 is positioned below the virtual inclined surface Q that passes through the holder inclined surface 94. As described above, when the upper peripheral surface of the roller 87 protrudes upward from the skin contact inclined surface 86, the roller 87 hits the skin surface before the skin contact inclined surface 86, and the roller 87 is allowed to play by frictional force with the skin surface. Since it rolls, the skin contact at the time of shaving can be made soft and smooth. Further, in a state where the roller 87 is in contact with the skin surface, the whisker can be cut while the roller 87 rolls and the razor head 2 is moved lightly.

Example 9 FIG. 23 shows Example 9 in which the movable blade drive structures D1 and D2 are changed. There, the drive gear 108 is fixed to the output shaft 3a of the motor 3, the eccentric gears 62 and 63 are provided on the driven gears 109 and 110 disposed in the front and rear of the gear 108, and the front and rear drive levers 55 and 56 are reversed. Enabled reciprocal rocking in synchronization with the direction. The eccentric cams 62 and 63 are connected to the driven gears 109 and 63 so that when the front eccentric cam 62 is located at the 3 o'clock position of the timepiece dial, the rear eccentric cam 62 is located at the 9 o'clock position. 110 is engaged with the drive gear 108. In this embodiment, the eccentric cams 62 and 63 and the cam grooves 64 and 65 constitute an operation conversion mechanism of the movable blade drive structures D1 and D2.

(Example 10) FIG. 24 shows Example 10 which changed movable blade drive structure D1 * D2. In this case, the front and rear drive levers 55 and 56 are reciprocally driven by a linear motor (motor) 112. The linear motor 112 includes a movable magnet 113 fixed to the swinging tips of the front and rear drive levers 55 and 56 and a fixed electromagnet 114 disposed on the head base 13 facing the movable magnet 113. 56 can be driven back and forth in the required drive pattern. For example, the front and rear drive levers 55 and 56 can be driven in synchronization with each other in opposite directions, or the front and rear drive levers 55 and 56 can be driven with different reciprocating strokes and different reciprocating speeds. In this embodiment, the linear motor 112 serves as the motor 3 and the operation conversion structure. Thus, the electric razor of the present invention includes the movable blade drive structures D1 and D2 that use the linear motor 112 as a power source.

  In the above embodiment, the motion conversion structure is constituted by the eccentric cams 62 and 63 and the cam grooves 64 and 65, but it is not necessary. The motion conversion structure includes the drive levers 55 and 56 that swing back and forth with the crank, the crank and the bell. A crank (corresponding to the drive levers 55 and 56), a plate cam and a bell crank circumscribing the peripheral surface thereof can be used. In the above embodiment, the connecting pins 57 to 61 and 66 are fixed to the drive levers 55 and 56, but it is not necessary, and the connecting pins 57 to 61 and 66 are fixed to the movable blade frames 25 and 29. Or you may form integrally with the movable blade frame 25 * 29. The movable blade 23 of the main blades 16 and 18 does not need to be a slit blade, and may be a movable blade having a semicircular small blade group. In addition to forming the connecting members 57 to 60 in a pin shape, the connecting members 57 to 60 can be formed with a hollow shaft shape or a shaft having a polygonal cross section.

  In the first embodiment, the roller 87 is provided only on the sub blade 19, but the roller 87 can also be provided on the first main blade 16, the center blade 17, and the second main blade 18. In that case, the rear peripheral surface of the roller provided on each of the cutting blades 16 to 19 and the inclined surface 86 are brought into contact with the skin surface, and the skin surface is directly pressed against the blade holes and slits of the fixed blades 22 and 26. Is eliminated, and the skin contact of each of the cutting blades 16 to 19 can be made soft. Further, if all the cutting blades 16 to 19 are provided with rollers 87 and all the cutting blades 16 to 19 are elastically supported so as to be movable up and down, the skin contact can be further softened.

2 Razor head 13 Head base 14 Fixed blade holder 16 First main blade (cutting blade)
17 Center blade (cutting blade)
18 Second main blade (cutting blade)
19 Sub blade (cutting blade)
22 Fixed blade 23 of the first main blade and second main blade Movable blade 24 of the first main blade and second main blade Fixed blade frame 25 of the first main blade and second main blade 25 First main blade and second main blade Movable blade frame 26 fixed blade 27 for center blade and sub blade movable blade 28 for center blade and sub blade fixed blade frame 29 for center blade and sub blade 29 movable blade frame 30 for center blade and sub blade Fixed blade support base 55 Drive lever 56 Rear drive levers 57 to 60 Connecting pins 62 and 63 Eccentric cams 64 and 65 Cam grooves 68 and 69 Oscillating center shafts 81 to 84 Skin contact protrusions 85 and 86 Skin contact inclined surface 87 Rollers C1 and C2 Cutting Blade group D1, D2 Movable blade drive structure

Claims (22)

A plurality of cutting blades (16-19) having fixed blades (22, 26) and movable blades (23, 27) are arranged on the razor head (2),
A movable blade drive structure (D1, D2) for reciprocatingly driving the movable blade (23, 27) includes a motor (3) and a drive lever (55, 27) for transmitting the power of the motor (3) to the movable blade (23, 27). 56), and a coupling body (57-60),
The drive lever (55, 56) is arranged in a state intersecting with the reciprocating direction of each movable blade (23, 27), and one end thereof is supported by the swing central shaft (68, 69) so as to be reciprocally swingable. ,
Connected bodies (57-60) are arranged at a plurality of positions in the longitudinal direction of the drive levers (55, 56) facing each movable blade (23, 27) in the vertical direction,
An electric shaver characterized in that the distance between each coupling body (57 to 60) and the swing center axis (68, 69) is different. Each fixed blade (22, 26) has a blade hole for introducing a beard,
The opening area of the blade hole of the fixed blade (22, 26) on the side close to the swing center axis (68, 69) of the drive lever (55, 56) is the swing center axis (68) of the drive lever (55, 56). The electric shaver according to claim 1, wherein the electric shaver is set to be larger than the opening area of the blade hole of the fixed blade (22, 26) far from 69).   The electric shaver according to claim 1 or 2, wherein the fixed blade (22, 26) on the side close to the swinging central axis (68, 69) of the drive lever (55, 56) is formed of a slit blade. A pair of cutting blade groups (C1, C2) consisting of a plurality of cutting blades (16-19) are arranged on the razor head (2), and a movable blade driving structure (for each cutting blade group (C1, C2)) ( D1 and D2) are provided,
A drive lever (55) constituting the movable blade drive structure (D1) of one cutting blade group (C1) and a drive lever (56) constituting the movable blade drive structure (D2) of the other cutting blade group (C2) The electric shaver according to any one of claims 1 to 3, wherein each of the movable blade driving structures (D1 and D2) is driven to swing in a state of being synchronized in opposite directions. The swinging central axis (68) of the drive lever (55) constituting the movable blade drive structure (D1) of one cutting blade group (C1) and the movable blade drive structure (D2) of the other cutting blade group (C2) The swinging central axis (69) of the drive lever (56) constituting the motor is separated from the motor (3),
The movable blade drive structure (D1, D2) includes an operation conversion structure that converts the rotational power of the motor (3) into a reciprocating swinging operation.
The electric razor according to claim 4, wherein each drive lever (55, 56) is simultaneously driven in a reverse direction by means of a single motor (3) through a motion conversion structure.   The motion conversion structure consists of an eccentric cam (62, 63) fixed to the output shaft (3a) of the motor (3) and a cam groove (64, 65) formed at the swinging tip of each drive lever (55, 56). The electric shaver according to claim 4 or 5, wherein the electric shaver is configured. One drive lever (55) and the other drive lever (56) are arranged before and after the central axis of the motor (3),
The at least one of the front and rear drive levers (56) is inclined with respect to the front and rear central axis of the razor head (2) perpendicular to the central axis of the motor (3). Electric razor. A plurality of coupling bodies (57 to 60) are arranged at a plurality of locations of one drive lever (55) and the other drive lever (56), respectively.
The distance from the axial center of the rocking | fluctuation center axis | shaft (68 * 69) of each drive lever (55 * 56) to the center of each connection body (57-60) is made different. The electric razor described in one. The cutting blade group (C1, C2) is composed of a cutting blade (16, 18) for finishing shaving and a cutting blade (17, 19) for rough shaving,
The fixed blade (22) and the movable blade (23) of the cutting blade (16/18) for finishing shaving, and the fixed blade (26) and the movable blade (27) of the cutting blade (17/19) for rough shaving, respectively. Are supported by the razor head (2) so as to be movable up and down, and are pushed up and biased by springs (31, 77),
The fixed blades (16, 18) on the left and right ends of the fixed blade (22) and the left and right ends of the fixed blade (26) of the rough shaving cutting blades (17, 19) The side edge frames (24a, 28a) of the fixed blade frame (24, 28) for supporting 22 and 26) are provided, and the tops of the fixed blades (22, 26) are arranged at the upper ends of the side edge frames (24a, 28a). Protruding per skin (81-84) that protrudes further upward is provided,
Assuming a virtual reference line (P) parallel to the reciprocating direction of the movable blade (23, 27) and positioned below the sliding surface of the movable blade (23, 27),
The vertical height from the virtual reference line (P) to the top of the protrusion (82, 84) per skin provided on the fixed blade (26) of the cutting blade (17, 19) for rough shaving is (H1), When the vertical height from the virtual reference line (P) to the top of the protruding portion (81, 83) provided on the fixed blade (22) of the cutting blade (16, 18) for finishing shaving is (H2) The protrusions (81 to 84) per skin are arranged so as to satisfy the inequality (H1> H2),
The vertical height from the virtual reference line (P) to the top of the fixed blade (22) of the cutting blade (16, 18) for finishing shaving is (H3), and the cutting blade for rough shaving from the virtual reference line (P) When the vertical height to the top of the fixed blade (26) of (17, 19) is (H4), the fixed blades (22, 26) are arranged so as to satisfy the inequality (H3 ≧ H4). The electric shaver according to any one of claims 4 to 8.   The skin contact protrusion (81-84) when the razor head (2) is viewed from the front-rear direction is formed with a skin contact inclined surface (85, 86) inclined downward from the top to the side end. The described electric razor.   The electric razor according to claim 10, wherein the inclined surface (85, 86) per skin is formed of an inclined surface having a curved outer surface. The fixed blade frame (24, 28) is supported by a fixed blade holder (14) removably attached to the razor head (2),
The electric shaver according to claim 10 or 11, wherein an inclined lower end of the inclined surface (85, 86) per skin is located below the top of the holder side frame (14a) of the fixed blade holder (14). A holder inclined surface (94) inclined downward from the top side to the side end side is formed on the upper part of the holder side frame (14a) when the razor head (2) is viewed from the front-rear direction,
When assuming a virtual inclined surface (Q) that passes through the holder inclined surface (94) and extends above the fixed blade (26), the inclined surface (85, 86) per skin is positioned below the virtual inclined surface (Q). The electric shaver according to any one of claims 10 to 12.   The outer surface of the side edge of the fixed blade (26) is at least in the inner corner between the side end frame (28a) of the fixed blade frame (28) of the cutting blade (17, 19) for rough shaving and the fixed blade (26). The electric shaver according to any one of claims 10 to 13, wherein a buffering portion (95) for covering is formed.   The electric shaver according to claim 14, wherein a buffer inclined surface (96) inclined downward toward the fixed blade (26) is formed in the buffer portion (95). A cutting blade (19) for rough shaving is disposed on at least one of the front end and the rear end of the razor head (2),
Protrusions per skin projecting on the left and right side end frames (28a) of the fixed blade frame (28) of the cutting blade (19) for rough shaving, before or after the fixed blade (26) of the cutting blade (19) ( The electric shaver according to any one of claims 9 to 15, wherein 84a) is formed.   The electric shaver according to claim 16, wherein a cut-out portion (89) for projecting the skin contact projection (84a) to the outside of the front and rear frame is formed on either one of the front and rear frames of the fixed blade holder (14).   The spring load of the spring (31) that pushes up and biases the fixed blade (26) of the cutting blade (17/19) for rough shaving pushes up the fixed blade (22) of the cutting blade (16/18) for finishing shaving. The electric shaver according to any one of claims 9 to 17, wherein the electric shaver is set smaller than a spring load of the spring (31) to be biased.   The electric shaver according to any one of claims 16 to 18, wherein the skin contact protrusions (81 to 84, 84a) are constituted by a roller (87) rotatable around a horizontal axis in the left-right direction.   The electric shaver according to claim 19, wherein the peripheral surface of the roller (87) is inclined flush with the inclined surface (85, 86) per skin. A pair of rollers (87) has conductivity,
The electric shaver according to claim 20, wherein a current supply source (90) for supplying a weak current of positive polarity and negative polarity to the pair of rollers (87) is provided. A plurality of cutting blades (16-19) having fixed blades (22, 26) and movable blades (23, 27) are arranged on the razor head (2),
Fixed blade frames (24, 28) that support the fixed blades (22, 26) are respectively mounted on the fixed blade support base (30), and the fixed blade support base (30) is detachable from the fixed blade holder (14). It is attached to
The fixed blade support base (30) is provided with a pair of left and right elastically deformable detachable arms (46) and a pair of separation projections (47) for releasing the engagement of the arms (46). 46) engaging claws (50) provided in the engaging blades (49) of the fixed blade holder (14),
The head base (13) of the razor head (2) is provided with a pair of engagement step portions (41) that engage and disengage with the engagement claws (43) of the fixed blade holder (14) attached to the head base (13). The release button (36) is provided, and the release button (36) is moved and urged by the button spring (37) so as to engage with the engagement step portion (41).
The inner surface of the removal arm (46) of the fixed blade support base (30) is received by a receiving wall (39) provided on the upper portion of the removal button (36), and the separation projection (47) is the upper portion of the removal button (36). Projecting outward from the outer surface of the fixed blade holder (14),
The release button (36) is grasped by one finger, the separation protrusion (47) is grasped by the other finger, and the release button (36) and the separation protrusion (47) are urged by the urging force of the button spring (37) and the removal arm (46). The electric razor is characterized in that the fixed blade holder (14) is detached and operated from the head base (13) by simultaneously pushing in against the elastic force.

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