JP2006255335A - Electric razor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the size of a floating support structure for oscillating a head unit. <P>SOLUTION: The floating support structure F includes at least a pair of right and left arms 45 for connecting the lower part of the head unit 2 and the upper part of a main body portion 1, and a coil spring 46 horizontally disposed and horizontally applying inward moving and energizing force to the lower end parts of the arms 45. The upper ends of the arms 45 are pivoted and connected to shafts 47 provided at the lower parts of the head unit 2 so as to be oscillated, and the lower ends of the arms 45 are guided and supported along slide holes 49 horizontally opened long at the upper parts of the main body portion 1 so as to be slid. In a normal state, the head unit 2 is floated at an intermediate position by the moving and energizing force of the coil spring 46. When the head unit 2 is pressed to a skin surface, the lower ends of the arms 45 are oscillated around the shafts 47 horizontally externally along the slide holes 49 while resisting the moving and energizing force of the coil spring 46, so that the head unit 2 is inclined and displaced horizontally and vertically to follow the change of the skin surface. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electric razor in which a head unit including a motor and a movable inner blade is floatingly supported so as to be tiltable with respect to a main body.

  This type of electric shaver is known, for example, from US Pat. There, a pair of left and right inverted portal float frames are connected to the lower part of the head unit, each float frame is guided by a vertical guide groove provided in the main body, and each float frame is arranged in the vertical direction. The head unit is supported in a floating manner so as to be tiltable by being pushed up and biased by a pair of front and rear compression coil springs.

  In Patent Documents 2 and 3 relating to the application of the present applicant, a pair of front and rear leg pieces (movable engagement pieces) are provided projecting downward on the left and right side surfaces of the cylindrical frame-shaped motor holder. The pieces are received by a pair of front and rear receiving claws (fixed engagement pieces) provided on the inner bottom wall of the seal frame so that they cannot be removed. A spring seat is provided between the front and rear receiving claws, and compression coil springs for supporting the entire head unit are arranged on the left and right sides between the spring seat and the motor holder.

Japanese Patent Laying-Open No. 2003-210872 (paragraph number 0016, FIG. 6) JP 2002-325984 A (paragraph number 0038, FIG. 10) JP 2003-117268 A (paragraph number 0028, FIG. 10)

  The problem of the swing support structure of Patent Documents 1 to 3 is that the entire structure is large, and it is inevitable that the space required for the installation becomes large. As a result, it is difficult to make the electric razor compact. There is. That is, the above floating support structure is like the sum of the length dimensions of the float frame and the compression coil spring (Patent Document 1) or the sum of the length dimensions of the leg pieces and the compression coil spring (Patent Documents 2 and 3). Since it is bulky, it is inevitable that the space occupied by the floating support mechanism occupying the entire electric razor is inevitably increased, which has been a major obstacle to downsizing the electric razor.

  An object of the present invention is to reduce the size of a floating support structure for swinging a head unit, thereby contributing to the compactness of an electric razor having a swing function.

  In the present invention, as shown in FIG. 2, the horizontally long head unit 2 including the motor 11 and the movable inner blade 16 is a floating support structure F provided between the main body 1 and the head unit 2. It is intended for electric razors that are floatingly supported so as to be tiltable in the direction. As shown in FIGS. 1, 11, and 12, the floating support structure F includes at least a pair of left and right arms 45 that connect the lower part of the head unit 2 and the upper part of the main body 1, and is arranged in the horizontal direction. And a coil spring 46 that applies a moving urging force inward to the left and right with respect to the lower end portion of the arm 45. The upper end of the arm 45 is pivotally connected to a shaft 47 provided at the lower portion of the head unit 2 so as to be swingable, and the lower end of the arm 45 is a slide hole that is long in the left-right direction at the upper portion of the main body 1. 49 is guided and supported so as to be slidable. Under normal conditions, the head unit 2 is in a floating neutral position due to the movement biasing force of the coil spring 46, and when the head unit 2 is pressed against the skin surface, the coil spring 46 is moved. The head unit 2 tilts and displaces left and right and up and down as the lower end of each arm 45 swings around the shaft 47 along the slide hole 49 while resisting the force. It is characterized by being able to follow changes.

  1 and FIG. 11 show a form in which coil springs 46 are arranged in the left-right direction so as to connect the lower portions of the respective arms 45, and FIG. 12 shows coil springs 46 on the left and right outer sides of the respective arms 45. The arranged form is shown. All the coil springs 46 exert an urging force inward in the left-right direction with respect to the arm 45, and the floating support structure F of the present invention includes both forms. In other words, the coil spring 46 may be arranged in the horizontal direction on the left and right, and may apply a biasing force inward to the left and right with respect to the lower end of the arm 45. Absent.

  In the present invention, as shown in FIG. 2, the horizontally long head unit 2 including the motor 11 and the movable inner blade 16 is a floating support structure F provided between the main body 1 and the head unit 2. It is intended for electric razors that are floatingly supported so as to be tiltable in the direction. As shown in FIGS. 13, 14, 15, and 16, the floating support structure F is arranged at least in a pair of left and right arms 45 that connect the lower part of the head unit 2 and the upper part of the main body 1 and in the front-rear horizontal direction. And a pair of left and right leaf springs 80 or bar-like springs 90 that apply a lateral and inward movement biasing force to the lower end portion of each arm 45, and the upper end of the arm 45 is a shaft provided at the lower portion of the head unit 2. The lower end of the arm 45 is guided and supported so as to be slidable along a slide hole 49 that is long in the left-right direction at the upper part of the main body 1. In a normal state, the head unit 2 is in a floating neutral position due to the movement biasing force of the leaf spring 80 or the rod-shaped spring 90, and when the head unit 2 is pressed against the skin surface, the leaf spring The head unit 2 tilts left and right and up and down as the lower end of each arm 45 swings left and right along the slide hole 49 around the shaft 47 while resisting the moving urging force of 80 or the bar spring 90. It is characterized by being displaced so that it can follow changes in the surface of the skin. FIGS. 13 and 14 show a form in which the leaf spring 80 is used as an urging element, and FIGS. 15 and 16 show a form in which the bar-like spring 90 is urged.

  As shown in FIGS. 1 to 6, the floating support structure F according to the present invention may include a total of four arms 45, a pair of left and right and two sets of front and rear. As shown in FIGS. 11 and 13, a pair of left and right arms 45 having a square frame shape may be provided. A total of four such square frame-like arms 45 may be provided on the left and right sides. That is, the arm 45 in the present invention is a concept including a plate shape as shown in FIGS. 1 to 6 and a square frame shape as shown in FIGS. 11 and 13. Furthermore, the arm 45 may have a U-shape such as the lower horizontal link 74 and the vertical links 71 and 72 in FIG.

  Further, in the form of the arm 45 shown in FIGS. 11 and 13, the arm 45 is swingable with the upper horizontal link 73 running back and forth as a swing fulcrum. Therefore, the “shaft 47 provided at the lower portion of the head unit 2” in the present invention means that the arm 45 can swing around the horizontal link 73 attached to the head unit 2 as shown in FIGS. 11 and 13. It is a concept including a simple structure.

  As shown in FIGS. 1, 11, 12, and 13, the left and right arms 45 are inclined between the head unit 2 and the main body 1 so that the distance between the opposing arms 45 increases downward. It is preferable to take the form attached to.

  As shown in FIGS. 1, 11, and 13, a pair of shafts 47 are provided at predetermined intervals in the left-right direction before and after the lower end of the head unit 2. Are pivotally connected to each other, and the left and right arms 45 preferably have a “C” -shaped posture in which the left and right arms 45 expand downward and are mounted between the head unit 2 and the main body 1. .

  At least the shaft 47 and the arm 45 are preferably connected flexibly. Specifically, as shown in FIG. 6, the bearing hole 52 of the arm 45 can take a form of an irregularly tapered hole whose inner diameter dimension in the front-rear direction becomes gradually smaller toward the center. Here, the inner diameter dimension of the central portion 53 of the bearing hole 52 is made to coincide with the outer diameter dimension of the shaft 47. According to this, the shaft 47 can be tilted in the bearing hole 52 in a state where the shaft 47 is fitted and held in the central portion 53 of the bearing hole 52. Therefore, the arm 45 and the shaft 47 are flexibly connected.

  As shown in FIGS. 1 and 11, a coil spring 46 is attached so as to connect the left and right arms 45, and the central portion of the coil spring 46 may be fixed to the main body 1. it can. Specifically, as shown in FIG. 3, an engaging seat 58 having a pair of left and right walls 57 is provided on the upper portion of the main body 1, and a coil spring 46 is sandwiched and held between these walls 57. Can do.

  In the present invention, as shown in FIG. 9, sensing means 61 for detecting the inclination angle of the head unit 2 with respect to the main body 1, and the motor 11 according to the inclination angle of the head unit 2 detected by the sensing means 61. Rotation control means 62 for controlling the rotation speed can be provided.

  As shown in FIG. 2, a display panel 10 that displays the tilt angle of the head unit 2 detected by the sensing means 61 can be provided in the main body 1.

  As shown in FIG. 10, part or all of the display panel 10 is formed of a transparent material, and the tilt angle display displayed on the display panel 10 can be viewed from the front and back.

  The electric shaver floating support structure F according to the present invention is arranged in the left and right coil springs 46 (refer to claim 1: FIG. 1, FIG. 11, FIG. 12, etc.) or in the front and rear horizontal directions. A leaf spring 80 (Claim 2: see FIG. 13) or a bar-shaped spring 90 (Claim 2: see FIG. 15) arranged in the front-rear horizontal direction is used as an urging element for the arm 45. Accordingly, it is easy to reduce the vertical dimension of the floating support structure F itself as compared with the conventional floating support structure shown in Patent Documents 1 to 3, which uses a spring arranged long in the vertical direction as a biasing element. is there. Therefore, since the space occupied by the floating support structure F occupying the electric razor can be made as small as possible, the electric razor including the swing mechanism can be made compact.

  When the left and right arms 45 are mounted between the head unit 2 and the main body 1 in an inclined posture such that the distance between the opposing arms increases downward, the arms 45 are smoothly swung. Can do. That is, the swing around the shaft 47 along the slide hole 49 of the arm 45 accompanying the tilt displacement of the head unit 2 from the normal posture to the tilted posture can be smoothly performed without rattling. Thereby, since the tilting operation of the head unit 2 becomes light, the operability of the electric razor is greatly improved.

  As shown in FIGS. 1, 11, and 13, the left and right arms 45 extend downwardly on a shaft 47 provided at a predetermined interval in the left-right direction before and after the lower end of the head unit 2. As shown in FIG. 12, the neutral posture in the normal state is remarkably stabilized as compared with the configuration in which the upper ends of the left and right arms 45 are pivotally connected by one shaft (see FIG. 12). Therefore, the head unit 2 is not inadvertently tilted and displaced, and the problem that the operability of the electric shaver is impaired can be eliminated. Since the biasing means such as the coil spring 76 for stabilizing the head unit 2 in a neutral floating posture as shown in FIG. 12 can be eliminated, the number of parts is reduced and the manufacturing cost of the electric shaver is reduced. There is also an advantage that it can contribute to the reduction of.

  If at least the shaft 47 and the arm 45 are flexibly connected, the head unit 2 can be tilted not only in the vertical and horizontal directions but also in the longitudinal direction (see FIG. 6). That is, the head unit 2 can be tilted in all directions, up and down, left and right, and front and rear. As a result, the head unit 2 can follow the change in the skin surface more smoothly, so that the wrinkle cutting can be performed more appropriately without damaging the skin surface.

  When the left and right central portions of the coil spring 46 are fixed to the main body 1, an inward biasing force with the fixed portion as a fulcrum can be applied equally to the left and right arms 45. According to this, since the operation of the floating support structure F is remarkably stabilized, the reliability is improved. Since the number of the coil springs 46 can be reduced, there is an advantage that it is possible to contribute to the reduction of the manufacturing cost of the electric shaver.

  Sensing means 61 for detecting the inclination angle of the head unit 2 with respect to the main body 1 and rotation control means 62 for controlling the rotation speed of the motor 11 according to the inclination angle of the head unit 2 detected by the sensing means 61. If it is provided, more efficient scissor cutting can be performed in accordance with the posture change of the head unit 2. As an example of the control method, when the posture of the head unit 2 is displaced so that the entire head unit 2 approaches the main body 1, the shaving surface (specifically, the fixed outer blade) of the head unit 2 is strongly pressed against the skin surface. Therefore, it is determined that there are many “切断” to be cut, and the rotation speed of the motor 11 is increased (see No. 2 in the table of FIG. 9). As a result, the number of times the movable inner blade 16 is driven per unit time can be increased, so that the scissors can be cut more efficiently.

  When the display panel 10 for displaying the tilt angle of the head unit 2 detected by the sensing means 61 is provided on the main body 1, the display panel 10 can be used when the main razor main body 1 is gripped and used. By visually recognizing the displayed tilt angle information of the head unit 2, it is possible to clearly know the operating state of the electric razor.

  If a part or all of the display panel 10 is formed of a transparent material and the tilt angle displayed on the display panel 10 can be viewed from the front and back, the tilt reflected in the mirror 69 as shown in FIG. The driving state can be confirmed by the angle display. Further, when the inclination angle display or the like is switched to the non-display state, the skin state can be transferred to the mirror via the transparent display panel 10, so that it is possible to accurately check the skin state and the presence of wrinkles left after shaving. You can shave.

(First embodiment)
1 to 10 show an embodiment in which the present invention is applied to a rotary electric shaver. In FIG. 2, the electric razor is composed of a main body 1 also serving as a grip and a head unit 2 provided on the upper part.

  As shown in FIG. 8, the main body 1 includes plastic front and rear cases 3 a and 3 b that are divided in half, and plastic front and rear decorative panels 5 a and 5 b that cover the surfaces of the cases 3 a and 3 b. A pair of front and rear secondary batteries 6 and 6, a control board 7 and the like are incorporated therein (see FIG. 2). At the upper ends of the cases 3a and 3b and the decorative panels 5a and 5b, an inverted triangular window 9 is opened, and a transparent display panel 10 is fitted in the window 9 in a closed state. Various device information is displayed on the display panel 10.

  As shown in FIG. 2, a switch button 12 for switching the energized state of the motor 11 disposed in the head unit 2 between an on state and an off state and a switch button 12 on the front upper portion of the main body 1 are turned on. An indicator lamp 13 that is turned on when the lamp is turned on is arranged. The switch button 12 has a push button structure, and the motor 11 can be switched between an on state and an off state by a push operation.

  In FIG. 4, the head unit 2 includes a horizontally long head case 15 formed by joining a semi-cylindrical front half 15 a and a rear half 15 b which are divided in the front and rear directions, and a movable inner blade incorporated in the head case 15. 16, a fixed outer blade 17 and an outer blade holder 19, a movable inner blade driving motor 11, a housing 20 that houses the motor 11, a gear mechanism 21 that transmits the rotational power of the motor 11 to the movable inner blade, and the like. To do.

  As shown in FIG. 1, the movable inner blade 16 is a rotary blade, and shaft portions at both ends thereof are rotatably supported by a movable inner blade support base 22 mounted on the upper portion of the housing 20. The fixed outer blade 17 is formed of a mesh blade, and is supported by an outer blade holder 19 in the shape of a laterally long arch. The motor 11 is arranged horizontally in the housing 20 and can be washed with water by sealing the arrangement portion in a watertight manner. The output shaft 23 of the motor 11 protrudes from both sides of the housing 20, and the gear mechanism 21 is provided on the right end side thereof.

  The housing 20 includes a bottomed cylindrical main case 25, a cap 26 that closes the opening of the main case 25, and a clip 27 that clamps and fixes the two in an inseparable manner. As shown in FIG. 1, the joint portion between the main case 25 and the cap 26 is sealed with a packing 29. A seal 30 seals between the main case 25 and the output shaft 23. Both packings 29 and 30 are formed packing.

  As shown in FIG. 4, the housing 20 in which the motor 11 is accommodated is sandwiched between the front half 15a and the rear half 15b, engages the joint surfaces of the both halves 15a and 15b, and further joins the upper half. The housing 20 can be integrated with the head case 15 by fastening the left and right surfaces with a pair of screws 31 and 31 (see FIG. 1).

  In FIG. 1, the gear mechanism 21 is disposed between a driving gear 32 fixed to the output shaft 23 of the motor 11, a final gear 33 fixed to one shaft end of the movable inner blade 16, and both gears 32 and 33. And the rotational power of the output shaft 23 is transmitted to the final gear 33 in a decelerated state. The outer surfaces of these gear groups are covered with a gear cover 36.

  In order to lock and hold the outer blade holder 19 attached to the head case 15, a pair of left and right lock release buttons 37, 37 are arranged on the inner surface of the side wall of the head case 15, and the button 37 is compressed by a compression coil spring 39. The lock is energized. When the lock release button 37 is pushed in against the urging force of the spring 39, the engagement state between the lock claw 40 provided on the lock release button 37 and the lock recess 41 provided on the outer blade holder 19 is released. The outer blade holder 19 can be removed from the head case 15.

  The head unit 2 is floatingly supported by a floating support structure F provided between the head unit 2 and the main body 1 so as to be tiltable in all directions of up and down, left and right, and front and back. This floating support structure F connects the lower end of the head unit 2 and the upper end of the main body part, and connects a pair of left and right, a total of four arms 45, and the lower ends of the left and right arms 45 to each other. A pair of front and rear coil springs 46 and 46 disposed in the horizontal direction on the left and right are the main components.

  As shown in FIG. 3, the upper end of each arm 45 is pivotally connected to a shaft 47 provided in the head unit 2 so as to be swingable, and the lower end thereof is a slide hole that is long in the left-right direction. 49 is guided and supported so as to be slidable in the left-right direction. The arm 45 is a plastic molded product formed integrally with a band plate-shaped base portion 50 and a pivot shaft 51 projecting in the front-rear direction at the lower end of the base portion 50, and a shaft 47 at the upper end of the base portion 50. A bearing hole 52 is provided in the front-rear direction. As shown in FIG. 6, the bearing hole 52 is an irregularly tapered hole whose inner diameter in the front-rear direction gradually decreases as it goes to the center. The inner diameter dimension of the central portion 53 of the bearing hole 52 matches the outer diameter dimension of the shaft 47, and the shaft 47 is configured to be tiltable within the bearing hole 52 while being fitted and held in the central portion 53. Yes. That is, the shaft 47 and the arm 45 are connected in a flexible state.

  In FIG. 3, reference numeral 55 denotes a pair of left and right bearing walls and two front and rear bearing walls integrally projecting upward from the upper surfaces 56 of the front and rear cases 3 a and 3 b of the main body 1. In addition, a slide hole 49 that allows the pivot shaft 51 to slide in the left-right direction is provided long in the left-right direction. The left and right ends of each slide hole 49 are rounded to avoid contact interference with the pivot shaft 51.

  The coil spring 46 connects the pivot shafts 51 of the left and right arms 45, and exerts an inward biasing force with respect to the lower ends of these arms 45 so that the distance between the opposing spaces becomes small. The central portion of the coil spring 46 in the left and right length direction is clamped by a locking seat 58 formed by two walls 57 projecting upward from the center portion in the left and right direction of the upper surfaces 56 of the front and rear cases 3a and 3b. The inward biasing force is equally exerted on the left and right arms 45 with the locking fixing portion by the locking seat 58 as a fulcrum.

  Reference numeral S denotes a gap provided between the head unit 2 and the main body 1 and allowing the head unit 2 to tilt. The gap S is closed by a cylindrical elastic cover 59 that extends from the inner surface of the lower end edge of the head unit 2 to the inner surface of the upper end edge of the main body 1. The elastic cover 59 pushes up and biases the head unit 2 upward, so that it can be expected to prevent the head unit 2 from being inadvertently wobbled. A power supply lead (not shown) is disposed between the motor 11 and the control plate 7 through the gap S.

  As shown in FIG. 3, the left and right shafts 47 are arranged at a predetermined interval in the center of the head unit 2. The spacing distance between the shafts 47 and 47 in the left-right direction is set smaller than the spacing distance between the slide holes 49 and 49 in the left-right direction. Therefore, the arms 45 and 45 always swing in the horizontal direction along the slide hole 49 around the shaft 47 in a downwardly expanding “C” -shaped posture such that the distance between the left and right opposing spaces increases downward. I can move.

  In the floating support structure F configured as described above, no force is applied to the head unit 2. In the “normal state” as shown in FIGS. 1, 3, and 4, the coil spring 46 moves inwardly from side to side. In response to the urging force, each arm 45 has a lower end portion located at the inner end of the slide hole 49 in the left-right inward direction, and the head unit 2 is in a floating neutral position. When the head unit 2 is pressed against the jaw or cheek from this state, the arm 45 swings in the left-right direction around the shaft 47 along the slide hole 49 while resisting the moving biasing force of the coil spring 46. The head unit 2 can be tilted in all directions, up and down, left and right, and front and rear.

  Specifically, as shown in FIG. 5, when a downward force is applied to the upper left portion of the head unit 2, the left arm 45 resists the moving urging force of the coil spring 46 while its lower end portion. Oscillates around the shaft 47 so that the head unit 2 is positioned on the left outer side of the slide hole 49, and the head unit 2 is tilted to the left. When the downward force on the head unit 2 is released, each arm 45 receives the moving biasing force of the coil spring 46 and returns to the normal state as shown in FIGS. 5 shows the state of the front arm 45, it goes without saying that the posture of the rear arm 45 is similarly displaced.

  When a downward force is applied to the entire head unit 2, all of the left and right and front and rear arms 45 swing along the slide hole 49 so that the opposing distance between the lower ends thereof increases. Move. As a result, the entire head unit 2 is displaced downward so as to approach the main body 1.

  As shown in FIG. 6, when a forward force is applied to the head unit 2, the left and right arms 45 on the front side have a slide hole that expands so that the opposing distance between the lower ends thereof increases. Swing along 49. At the same time, the front shaft 47 is displaced from the horizontal direction to a tilted posture that rises backward while being fitted and held in the bearing hole 52. As a result, the head unit 2 is displaced to an inclined posture inclined forward as shown in FIG. On the contrary, when a rearward force is applied to the head unit 2, the left and right arms on the rear side swing around the shaft 47 so that the shaft 47 fits in the bearing hole 52. While being held, the head unit 2 is displaced from the horizontal direction to an upwardly inclined posture, whereby the head unit 2 is displaced to an inclined posture inclined backward. In this floating support structure F, the four arms 45 arranged at the front and rear and left and right positions move independently, so that the head unit can be moved to the left diagonally front, left diagonally rearward, right diagonally forward, and right diagonally rearward direction. It goes without saying that it is possible to tilt 2.

  As described above, when the head unit 2 is floatably supported by the floating support structure F so as to be tiltable in all directions, up and down, left and right, and front and rear, the head unit 2 can be tilted following the change in the skin surface. Therefore, it is possible to perform beard cutting more appropriately without damaging the skin surface. In this floating support structure F, since the four arms 45 are independently arranged at the front and rear and left and right positions, the head unit 2 is also mounted in the diagonally left front, diagonally left rear, diagonally right front, and diagonally right back directions. It can be tilted. Above all, the floating support structure F uses the coil springs 46 arranged in the left and right horizontal directions as biasing elements with respect to the arms 45, so that the springs arranged long in the vertical direction as in the conventional floating support structure are used. Compared with the element using the biasing element, the vertical dimension of the floating support structure F itself can be reduced to reduce its size. As a result, the space occupied by the floating support structure F in the electric razor can be reduced, which can contribute to the compactness of the electric razor provided with the swing mechanism.

  When the left and right arms 45 are mounted between the head unit 2 and the main body 1 in a “C” -shaped inclined posture such that the distance between the opposing arms increases downward, Can swing smoothly. That is, the swing around the shaft 47 along the slide hole 49 of the arm 45 accompanying the tilt displacement of the head unit 2 from the normal posture to the tilted posture can be smoothly performed without rattling. Thereby, since the tilting operation of the head unit 2 becomes light, the operability of the electric razor is improved.

  If a pair of shafts 47 are provided in front of and behind the lower end of the head unit 2 at a predetermined interval in the left-right direction, and the upper end of the arm 45 is pivotally connected to these shafts 47, one shaft Thus, the neutral position in the normal state is significantly stabilized as compared with the configuration in which the upper ends of the left and right arms 45 are pivotally connected (see FIG. 12). Therefore, the head unit 2 is not inadvertently tilted and displaced, and the problem that the operability of the electric shaver is impaired can be well suppressed.

  When the left and right central portions of the coil spring 46 are locked and fixed to a locking seat 58 provided on the upper portion of the main body 1, an inward biasing force with the locking fixing portion by the locking seat 58 as a fulcrum Can be made to act equally on the left and right arms 45, so that the operation of the floating support structure F is remarkably stabilized. Since the number of the coil springs 46 can be reduced, the number of parts can be reduced, and the manufacturing cost of the electric shaver can be reduced.

  In addition, the electric razor according to the present embodiment is provided with sensing means for detecting the inclination angle of the head unit 2 with respect to the main body 1, and is applied to the motor 11 according to the inclination angle of the head unit 2 detected by the sensing means. The drive current of the movable inner blade 16 is automatically controlled by the control unit (rotation control means) 62 (see FIG. 9) by changing the load current. Further, the posture state of the head unit 2 and the driving rotational speed of the movable inner blade 16 are displayed on the display panel 10.

  3 and 4, reference numeral 61 denotes a reed switch embedded and fixed in the upper surface 56 of the front and rear cases 3 a and 3 b corresponding to each arm 45, and reference numeral 60 is embedded and fixed to the lower end of each arm 45. A magnet for turning on the reed switch 61 is shown, and these constitute a sensing means. As shown in FIG. 3, the reed switch 61 is disposed on the left and right outer sides facing the swing locus of the lower end of the arm 45, and the head unit 2 is tilted and displaced in the left and right direction as shown in FIG. 45 slides in the slide hole 49, and when its lower end reaches the position opposite to the reed switch 61, the contact of the reed switch 61 is energized by the magnet 60, and an ON signal is transmitted to the control unit 62. To be. The control unit 62 is substantially a microchip mounted on the control board 7.

  The table of FIG. 9 shows the control state of the movable inner blade 16 by the control unit 62 based on the on / off states of the four reed switches 61 and the detection signals from these reed switches 61. Here, the driving rotational speed of the movable inner blade 16 is controlled in three stages of a high speed mode, a standard mode, and a low speed mode. The “standard” rotation speed means the drive rotation speed of the movable inner blade 16 when the head unit 2 is in a normal state as shown in FIG. 1, and a rotation speed higher than this rotation speed is “ Speeds slower than “high speed” and “standard” are defined as “low speed”. Specifically, the drive rotation speed of the movable inner blade 16 in the standard mode can be 3000 rpm, 3500 rpm in the high speed mode, and 2500 rpm in the low speed mode.

  First, when the head unit 2 is in the normal state as shown in FIG. 1, all the arms 45 are positioned at the left and right inward rear end portions of the slide holes 49 due to the inward movement biasing force of the coil spring 46. Therefore, any of the reed switches 61 is in an off state that is not affected by the magnet 60. Therefore, at this time, the movable inner blade 16 is rotated in the standard mode (No. 1). When all the reed switches 61 are turned on, the shaving surface (specifically, the fixed outer blade) of the head unit 2 is strongly pressed against the skin surface, and there are a lot of “skins” to be cut. Judging, the movable inner blade 16 is rotated in the high speed mode (No. 2).

  When only the front or rear left and right reed switches 61 are turned on, the movable inner blade 16 is rotated in the standard mode (No. 3, No. 4). This is because the shaving operation is performed in a horizontal posture in which the head unit 2 extends in the left-right direction, and it can be determined that the shaving surface of the head unit 2 is in wide contact with the skin surface. On the other hand, when only one set of front and rear reed switches 61 on the left side or the right side is turned on, the movable inner blade 16 is rotated in the low speed mode (No. 5, No. 6). This is a vertically inclined posture in which the head unit 2 is elongated in the vertical direction, and the shaved surface of the head unit 2 is in point contact with the skin surface, so that the skin is bitten and damaged. By judging that there is a fear.

  FIG. 7 shows a device information display form of the display panel 10. In this case, the display panel 10 is composed of a transparent liquid crystal panel so that the device information display can be displayed with characters and figures. Specifically, when the switch button 12 is turned on, the remaining battery level is displayed as a bar graph 65 and a numerical value 66 (percent). Further, the inclination posture of the head unit 2 is displayed as a graphic 67, and the driving rotation mode of the movable inner blade 16 associated with the inclination posture of the head unit 2 is displayed as characters 68. In the illustrated example, the head unit 2 is inclined and displaced in the left front direction, and the movable inner blade 16 is driven in the low speed mode.

  In this way, when the display panel 10 is a transparent liquid crystal panel, as shown in FIG. 10, the device information display can be seen from the front and back surfaces of the display panel 10, so that shaving is performed from the throat to the chin. However, the operation state of the electric razor can be confirmed by the device information displayed on the mirror 69. When the device information display is switched to the non-display state, the state of the skin can be copied to the mirror 69 via the transparent display panel 10, so that the user can shave while checking the state of the skin and the presence or absence of unshaven wrinkles. .

  When the display panel 10 is composed of a liquid crystal panel, not only operating state information but also information specific to an electric razor such as main specifications and manufacturing information, and maintenance information for an electric razor, for example, charging time is approaching. Information such as the time for replacement of the movable inner blade 16 and the outer blade 17 approaching, the need for fuzz cleaning, or the accumulated usage time of the electric razor can be displayed as necessary.

  In the first embodiment, the arm 45 having the bearing hole 52 is attached to the shaft 47 provided in the head unit 2, but on the contrary, the shaft is provided on the arm 45 side and the head unit is provided. A bearing hole that allows insertion of the shaft may be provided on the second side.

(Second Embodiment)
FIG. 11 shows an electric razor according to the second embodiment of the present invention. There, it differs from the first embodiment in that a floating support structure F is constituted by a pair of left and right arms 45 in the form of a square frame and a single coil spring 46 connecting the lower ends of the arms 45. . Specifically, each arm 45 includes a pair of front and rear vertical links 71 and 72 that connect the head unit 2 and the main body 1, and a pair of upper and lower horizontal links that run in the front and rear direction so as to connect the upper and lower ends of the vertical links 71 and 72. 73 and 74. The upper horizontal link 73 is pivotally connected to a bearing hole (not shown) provided in the head unit 2 so as to be swingable. The front and rear ends of the lower horizontal link 74 are inserted into a slide hole 49 provided in the bearing wall 55. However, the vertical links 71 and 72 of each arm 45 can swing in the left-right direction around the horizontal link 73 along the slide hole 49. In other words, the horizontal link 73 is used as the shaft 47 in the present invention, and the arm 45 can swing around the shaft 47.

  The coil spring 46 is arranged so as to connect the front and rear central portions of the lower horizontal links 74 and 74, and the horizontal links 74 and 74 are inwardly directed to the left and right so that the distance between the opposing links becomes small. Gives moving force. As in the first embodiment, the left and right central portions of the coil spring 46 are locked and fixed to the locking seat 58.

  The distance between the left and right horizontal links 73 and 73 is set to be smaller than the distance between the slide holes 49 and 49 in the left and right direction. Therefore, the arms 45 and 45 are in a “C” -shaped posture in which the left and right facing distance dimensions always increase as they go downward, and in the horizontal direction along the slide hole 49 around the horizontal link 73. Can swing.

  In the floating support structure F configured as described above, in the “normal state” in which no force is applied to the head unit 2, each arm 45 receives its downward inward moving biasing force of the coil spring 46 and each arm 45 has its lower end. The head unit 2 is in a floating neutral position, and the head unit 2 is in a floating neutral position. When the head unit 2 is pressed against the jaw or cheek from this state, the arm 45 swings left and right along the slide hole 49 around the horizontal link 73 against the moving biasing force of the coil spring 46, The head unit 2 can be tilted vertically and horizontally. That is, in the floating support structure F, the head unit 2 can tilt in the vertical and horizontal directions with respect to the main body 1.

  In the floating support structure F according to the second embodiment, the same effect as the floating support structure F of the first embodiment can be obtained. That is, since the coil springs 46 arranged in the horizontal direction on the left and right are used as a biasing element for the arm 45, a spring arranged long in the vertical direction as in the conventional floating support structure is used as a biasing element. In comparison, it is easy to reduce the vertical dimension of the floating support structure F itself. Therefore, the space occupied by the floating support structure F in the electric razor is reduced, and the electric razor provided with the swing mechanism is made compact. be able to. Since the left and right arms 45 are mounted between the head unit 2 and the main body 1 in a “C” -shaped inclined posture such that the distance between the opposing arms increases downward, from the normal posture. The swing around the shaft 47 along the slide hole 49 of the arm 45 accompanying the tilting displacement of the head unit 2 to the tilted posture can be smoothly performed without rattling. If the left and right arms 45 and 45 are configured to be swingable around horizontal links 73 and 73 arranged at predetermined intervals in the left and right direction, the upper ends of the left and right arms 45 are pivotally connected by one axis. Compared to the form, the neutral position in the normal state is remarkably stable, and therefore the head unit 2 is not inadvertently tilted and displaced, and the operability of the electric shaver is not impaired.

  In addition, when the left and right center portions of the coil spring 46 are locked and fixed to a locking seat 58 provided on the upper portion of the main body 1, the inward direction with the locking fixing portion by the locking seat 58 as a fulcrum Can be applied equally to the left and right arms 45, so that the operation of the floating support structure F is remarkably stabilized. In the configuration according to the second embodiment, an inward biasing force can be applied to the left and right arms 45 and 45 by a single coil spring 46, so that it is compared with the configuration according to the first embodiment. It is also excellent in that the number of parts can be reduced.

  Above all, when the arm 45 has a square frame shape, the head unit 2 and the main body 1 can be firmly connected. Therefore, the head unit 2 and the main body 1 are formed by the four strip-shaped arms 45 of the first embodiment. And the overall rigidity of the electric razor can be significantly improved. Therefore, it is possible to obtain a highly reliable electric shaver with little risk of malfunction.

(Third embodiment)
FIG. 12 shows a third embodiment of the present invention. The floating support structure F there is a point that the left and right arms 45 are pivotally connected to a single shaft 47 provided at the lower end of the head unit 2, and a roller 75 is provided at the lower end of each arm 2. The roller 75 is rotatably mounted, and the roller 75 is guided and supported so as to be slidable along the left and right long slide holes 49 provided at the upper end of the main body 1. The lower end outer surface of each arm 45 and the main body A coil spring 46 is assembled between the inner surface of each of the cases 3a and 3b, and the coil spring 46 applies an inward biasing force to the lower end of each arm 45; For the purpose of returning 2 to the normal state, vertical coil springs 76 and 76 that push up and urge the head unit 2 are attached to the left and right ends of the main body 1 in the first embodiment. Floating Differs from the lifting structure F. Since the other points are substantially the same as those in the first embodiment, the same members are denoted by the same reference numerals and the description thereof is omitted. In the floating support structure F according to the third embodiment, the four arms 45 are independently arranged at the front and rear positions and the left and right positions. Therefore, similarly to the floating support structure F according to the first embodiment, The head unit 2 can be tilted not only in the front-rear direction but also in the left diagonally forward direction, the left diagonally backward direction, the right diagonally forward direction, and the right diagonally backward direction. In addition, the operation and effect of the floating support structure F are the same as those of the first embodiment, and the description thereof is omitted.

  In the third embodiment, the roller 75 is rotatably attached to the lower end of each arm 45. However, the present invention is not limited to this, and for example, an elliptical sliding body may be attached to the lower end of the arm 45. . The point is that the lower end of each arm 45 can be smoothly slid along the slide hole 49.

(Fourth embodiment)
13 and 14 show an electric razor according to a fourth embodiment of the present invention. Instead of the coil spring 46, the floating support structure F there is a pair of left and right elastic leaf springs 80 that are arranged in the front-rear horizontal direction and apply a lateral and inward movement biasing force to the lower end of each arm 45. The point which uses as an urging element is greatly different from the second embodiment. Reference numeral 81 denotes a connecting wall that connects the left and right end portions of the front and rear bearing walls 55, and reference numeral 82 denotes a pair of locking walls that are formed to protrude inwardly in the front-rear direction toward the left and right sides of the connecting wall 81. The front and rear ends of the spring 80 are inserted and mounted between the facing gaps between the connecting wall 81 and the locking wall 82.

  In this floating support structure F, in a normal state where no force is applied to the head unit 2, the wave projections 83 of the leaf springs 80 projecting inwardly face the horizontal link 74 of the arm 45 toward the left and right. A moving urging force is applied, whereby the horizontal link 74 is positioned at the inner end of the slide hole 49 facing inward. When a force is applied to the head unit 2 from such a normal state, the arm 45 swings left and right along the slide hole 49 around the horizontal link 73 while resisting the moving biasing force of the leaf spring 80. The head unit 2 can be tilted vertically and horizontally.

  In the floating support structure F according to the fourth embodiment, the same effect as that of the floating support structure F of the second embodiment can be obtained. That is, since the leaf springs 80 arranged in the front and rear horizontal directions are used as a biasing element with respect to the arm 45, a spring arranged long in the vertical direction as in the conventional floating support structure is used as a biasing element. In comparison, it is easy to reduce the vertical dimension of the floating support structure F itself. Therefore, the space occupied by the floating support structure F in the electric razor is reduced, and the electric razor provided with the swing mechanism is made compact. be able to. Since the left and right arms 45 are mounted between the head unit 2 and the main body 1 in a “C” -shaped inclined posture such that the distance between the opposing arms increases downward, from the normal posture. The swing around the shaft 47 along the slide hole 49 of the arm 45 accompanying the tilting displacement of the head unit 2 to the tilted posture can be smoothly performed without rattling. If the left and right arms 45 and 45 are configured to be swingable around horizontal links 73 and 73 arranged at predetermined intervals in the left and right direction, the upper ends of the left and right arms 45 are pivotally connected by one axis. Compared to the form, the neutral position in the normal state is remarkably stable, and therefore the head unit 2 is not inadvertently tilted and displaced, and the operability of the electric shaver is not impaired. If the arm 45 has a quadrangular frame shape, the head unit 2 and the main body 1 can be firmly connected to each other. Therefore, the head unit 2 and the main body 1 are connected by the four strip-shaped arms 45 of the first embodiment. Compared to the connected form, the overall rigidity of the electric razor can be remarkably improved. Therefore, it is possible to obtain a highly reliable electric shaver with little risk of malfunction.

(Fifth embodiment)
15 and 16 show an electric razor according to a fifth embodiment of the present invention. The floating support structure F there is greatly different from the fourth embodiment in that instead of the leaf spring 80, a pair of left and right bar-shaped springs 90 arranged in the front-rear and horizontal directions are used as urging elements. Reference numeral 91 denotes a support body that supports the rod-shaped spring 90 formed at the upper ends of the front and rear cases 3a and 3b. The support 91 is provided with a through-hole 92 that allows the rod-shaped spring 90 to be inserted therethrough. The floating support structure F includes a total of four arms 45, a pair of left and right, and two sets of front and rear. The shaft 51 provided at the lower end of each arm 45 is guided and supported by the slide hole 49, and is rotated around the shaft 47. It is configured to be swingable. A metal wire such as a piano wire can be suitably used for the rod-shaped spring 90. It may be made of an elastic material such as rubber.

  The rod-shaped spring 90 connects the lower end portions of the front and rear vertical links 71 and 72, and in a normal state where no force is applied to the head unit 2, the shaft 51 is a rear end portion of the slide hole 49 facing inward left and right. The head unit 2 is in a neutral posture. When a force is applied to the head unit 2 from such a normal state, the arm 45 swings in the left-right direction along the slide hole 49 around the shaft 47 while resisting the moving biasing force generated by the deformation of the rod-shaped spring 90. The head unit 2 can be tilted up and down and left and right. When the force on the head unit 2 is released, the head unit 2 returns to the neutral posture by the biasing force of the rod-shaped spring 90. Further, in this floating support structure F, since the four arms 45 are independently arranged at the front and rear and left and right positions, not only in the vertical and horizontal and front and rear directions, but also in the left diagonal front, left diagonal rear, right diagonal front, It is possible to tilt the head unit 2 also in the diagonally backward right direction.

  In the floating support structure F according to the fifth embodiment, the same effect as that of the floating support structure F in the fourth embodiment can be obtained. That is, since the bar-shaped springs 90 arranged in the front and rear horizontal directions are used as a biasing element for the arm 45, the springs arranged long in the vertical direction as in the conventional floating support structure are used as the biasing elements. In comparison, it is easy to reduce the vertical dimension of the floating support structure F itself. Therefore, the space occupied by the floating support structure F in the electric razor is reduced, and the electric razor provided with the swing mechanism is made compact. be able to. Since the left and right arms 45 are mounted between the head unit 2 and the main body 1 in a “C” -shaped inclined posture such that the distance between the opposing arms increases downward, from the normal posture. The swing around the shaft 47 along the slide hole 49 of the arm 45 accompanying the tilting displacement of the head unit 2 to the tilted posture can be smoothly performed without rattling. When the left and right arms 45 and 45 are configured to be swingable around shafts 47 and 47 arranged at a predetermined interval in the left and right direction, the upper ends of the left and right arms 45 are pivotally connected to one shaft. In comparison, the neutral posture in the normal state is remarkably stable, so that the head unit 2 is not inadvertently tilted and displaced, and the operability of the electric shaver is not impaired.

  In addition, in the said 5th Embodiment, although the arm 45 was made into strip | belt plate shape, the arm 45 is good also as square frame shape as shown in FIG. The rod-like spring 45 is not limited to a linear body as shown in the figure, and may be a thin plate-like metal piece or rubber piece. The “rod-like spring” referred to in the present invention is a concept including these.

  In the above embodiment, the case where the present invention is applied to a rotary electric razor has been described. However, the present invention is equally applicable to a reciprocating electric razor in which a movable inner blade is reciprocated in the left-right direction. In each of the above-described embodiments, the floating support structure F including two or four arms 45 is shown, but the number of arms 45 may be more than this. The slide hole 49 does not need to be provided in the bearing wall 55, and can be opened at the upper ends of the front and rear cases 3a and 3b.

It is a vertical front view which shows the floating support structure of the electric razor which concerns on 1st Embodiment of this invention. It is a front view of an electric razor. It is a front view of the principal part. It is a vertical side view of an electric razor. It is a figure which shows operation | movement of a floating support structure, and has shown the state in which the head unit inclined to the left direction. It is a figure which shows operation | movement of a floating support structure, and has shown the state in which the head unit inclined forward. It is a front view which shows the display mode of a display panel. It is a cross-sectional plan view of a main-body part. It is a figure for demonstrating the control method by a control part. It is a figure for demonstrating the display mode of a display panel. It is a perspective view which shows the floating support structure of the electric razor which concerns on 2nd Embodiment of this invention. It is a vertical front view which shows the floating support structure of the electric razor which concerns on 3rd Embodiment of this invention. It is a perspective view which shows the floating support structure of the electric razor which concerns on 4th Embodiment of this invention. It is a cross-sectional top view which shows the floating support structure of the electric razor which concerns on 4th Embodiment of this invention. It is a perspective view which shows the floating support structure of the electric razor which concerns on 5th Embodiment of this invention. It is a cross-sectional top view which shows the floating support structure of the electric razor which concerns on 5th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main-body part 2 Head unit 10 Display panel 11 Motor 16 Movable inner blade 45 Arm 46 Coil spring 47 Shaft 49 Slide hole 61 Sensing means (reed switch)
62 Rotation control means (control unit)
80 leaf spring 90 bar spring

Claims (9)

The horizontally long head unit (2) including the motor (11) and the movable inner blade (16) is a floating support structure (F) provided between the main body (1) and the head unit (2). And an electric razor supported so as to be tiltable up and down,
The floating support structure (F) includes at least a pair of left and right arms (45) for connecting the lower part of the head unit (2) and the upper part of the main body (1), and each arm (45) arranged in the horizontal direction. A coil spring (46) for applying a laterally inward movement biasing force to the lower end of
The upper end of the arm (45) is pivotally connected to a shaft (47) provided at the lower part of the head unit (2) so as to be swingable. The lower end of the arm (45) is the upper part of the main body (1). Along the slide hole (49) that is long in the left-right direction, it is guided and supported so as to be slidable.
Under normal conditions, the head unit (2) is in a floating neutral position under the movement biasing force of the coil spring (46),
When the head unit (2) is pressed against the skin surface, the lower end of each arm (45) moves along the slide hole (49) around the axis (47) while resisting the moving biasing force of the coil spring (46). An electric razor characterized in that the head unit (2) is tilted and displaced in the left and right and up and down directions by swinging in the left and right outward directions, and can follow changes in the skin surface. The horizontally long head unit (2) including the motor (11) and the movable inner blade (16) is a floating support structure (F) provided between the main body (1) and the head unit (2). And an electric razor supported so as to be tiltable up and down,
The floating support structure (F) includes at least a pair of left and right arms (45) for connecting the lower part of the head unit (2) and the upper part of the main body (1), and each arm (45) arranged in the front-rear horizontal direction. A pair of left and right leaf springs (80) or rod-like springs (90) that apply a lateral and inward movement biasing force to the lower end of
The upper end of the arm (45) is pivotally connected to a shaft (47) provided at the lower part of the head unit (2) so as to be swingable. The lower end of the arm (45) is the upper part of the main body (1). Along the slide hole (49) that is long in the left-right direction, it is guided and supported so as to be slidable.
Under normal conditions, the head unit (2) is in a floating neutral position in response to the moving biasing force of the leaf spring (80) or the rod-shaped spring (90).
When the head unit (2) is pressed against the skin surface, the lower end of each arm (45) slides around the shaft (47) while resisting the moving urging force of the leaf spring (80) or rod-like spring (90). The head unit (2) is tilted and displaced in the left and right and up and down directions by swinging in the left and right outward directions along (49), and can follow the surface change of the skin surface. Electric razor.   The left and right arms (45) are mounted between the head unit (2) and the main body (1) in an inclined posture such that the distance between the opposing arms increases downward. The described electric razor. Before and after the lower end of the head unit (2), a pair of shafts (47) are provided at predetermined intervals in the left-right direction, and the upper end portion of the arm (45) can swing freely on these shafts (47). Pivotally connected,
The electric razor according to claim 1, 2, or 3, wherein the left and right arms (45) are mounted between the head unit 2 and the main body 1 in a “C” -shaped posture in which the left and right arms are expanded downward.   The electric shaver according to claim 1, 2 or 3 or 4, wherein at least the shaft (47) and the arm (45) are connected flexibly. A coil spring (46) is attached to connect the left and right arms (45),
The electric shaver according to claim 1, 3 or 4 or 5, wherein a central portion of the coil spring (46) is fixed to the main body (1).   Sensing means (61) for detecting an inclination angle of the head unit (2) with respect to the main body (1), and a motor (11) according to the inclination angle of the head unit (2) detected by the sensing means (61). The electric shaver according to any one of claims 1 to 6, further comprising a rotation control means (62) for controlling a rotation speed of the electric shaver.   The electric shaver according to claim 7, wherein the main body (1) is provided with a display panel (10) for displaying the inclination angle of the head unit (2) detected by the sensing means (61).   The electric shaver according to claim 8, wherein a part or all of the display panel (10) is formed of a transparent material so that the tilt angle display displayed on the display panel (10) can be viewed from the front and back.

Images