JP5001517B2 - Electric razor - Google Patents

Description

  The present invention relates to an electric razor provided with a vibration generating structure for forcibly vibrating a head portion.

  This type of electric shaver is known from, for example, Patent Document 1 and Patent Document 2. In both cases, vibration is generated by rotating the eccentric weight with motor power. In Patent Document 1, the vibration generating structure is arranged inside the head part, and in Patent Document 2, the vibration generating structure is incorporated inside the main body part.

Japanese Patent Laid-Open No. 51-58167 (first page, left column, lower row, FIG. 1) Japanese Patent Laid-Open No. 58-94881 (page 2, upper right column, FIG. 3)

  According to the electric razor having the above-described vibration generating structure, the head portion is vibrated to cause a mustache or the like from the skin surface, or by shaking the skin surface so that the beard protrudes from the skin surface. It can be done effectively. However, since the head portion and the main body portion are integrated, it is inevitable that vibration generated in the vibration generating structure is transmitted to the hand. In particular, in the electric razor of Patent Document 2, since the vibration generating structure is arranged inside the main body that also serves as a grip, vibration is easily transmitted to the hand, which may cause discomfort to the user.

  One or two pairs of eccentric weights are driven to rotate by motor power, and vibration is generated by the inertial moment of inertia of the eccentric weights. Therefore, the head part is vibrated at a frequency determined by the motor rotational speed. Vibration applied to the skin surface becomes monotonous.

  An object of the present invention is to provide an electric device that can vibrate only the head portion, and thus can effectively cut a beard by raising a mustache or the like from the skin surface while avoiding the vibration generated by the vibration generating structure from being transmitted to the user's hand. To provide a razor. An object of the present invention is to provide an electric razor capable of cutting a beard faster and shorter by giving a plurality of types of vibrations to the skin surface and effectively raising the beard or projecting from the skin surface. .

The electric razor of the present invention includes a main body portion 1 that also serves as a grip, and a head portion 3 that is supported by the main body portion 1 so as to be floatable at least in the vertical direction . The head unit 3 is provided with an inner blade 16, an outer blade 17, a motor 20 that drives the inner blade 16, and a power transmission mechanism that transmits motor power to the inner blade 16. Therefore, a vibration generating structure 50 for vibrating the head unit 3 at least in the vertical direction is arranged inside the head unit 3.

  Specifically, as shown in FIG. 1, a motor 20 that drives the inner blade 16 is disposed in the head portion 3, an output shaft 25 is projected from both ends of the motor 20, and an inner blade is attached to one end of the output shaft 25. A power transmission mechanism for 16 is provided, and a vibration generating structure 50 is provided at the other end.

  As shown in FIGS. 1 and 6, the vibration generating structure 50 includes motors 20 and 71 and eccentric weights 51 and 72 that are rotationally driven by the motors 20 and 71. That is, vibration can be generated by the inertial second moment when the eccentric weights 51 and 72 are rotationally driven.

  A power transmission mechanism is disposed at one end of the output shaft 25 of the motor 20, and an eccentric weight 51 is disposed at the other end of the output shaft 25. That is, the vibration generating structure 50 can be driven using the inner blade driving motor 20.

  A motor 20 that drives the inner blade 16 is placed horizontally on the head portion 3, and output shafts 25 are projected from both side ends of the motor 20. A power transmission mechanism is disposed at one end of the output shaft 25, and a vibration generating structure 50 is disposed at the other end of the output shaft 25.

  In FIG. 5, the vibration generating structure 50 includes a vibration generating weight 60 that is guided and supported by the head case 15 so as to be slidable up and down, an eccentric cam 62 that reciprocates the vibration generating weight 60 up and down, and a motor that rotationally drives the eccentric cam 62. 20, and vibration can be generated by a motion inertia force when the vibration generating weight 60 is driven to reciprocate.

  A reciprocating-type cutting blade unit 55 is provided on one side of the head portion 3, and the cutting blade unit 55 can be constituted by a fixed blade 56 and a movable blade 57 fixed to the vibration generating weight 60. The fixed blade 56 is composed of a mesh blade or a slit blade, and the movable blade 57 is composed of a group of small blades or slit blades. A fixed blade and a movable blade of a clipper blade may be used.

  As shown in FIG. 6, a second vibration generating structure 70 including a second motor 71 is arranged inside the head portion 3, and the drive rotational speeds of the motor 20 and the second motor 71 of the vibration generating structure 50 are different. Can be made.

  The second vibrating structure 70 may include a vibrating weight 60 that is guided and supported by the head case 15 so as to be slidable up and down, and an eccentric cam 62 that reciprocates the vibrating weight 60 up and down.

In the present invention, since the vibration generating structure 50 is disposed inside the head portion 3 where the inner blade 16, the outer blade 17, the motor 20, the power transmission mechanism, and the like are provided, and the head portion 3 is forcibly vibrated, it falls down. It is possible to cause the whiskers to protrude from the surface of the skin by raising the dented beard or the like from the skin surface or by shaking the skin surface with the head portion 3. Thereby, beard cutting can be performed effectively. In addition, since the head portion 3 is supported by the main body portion 1 serving also as a grip so as to be floatable at least in the vertical direction, the vibration of the head portion 3 is prevented from being transmitted to the main body portion 1 by the floating structure portion. The generated vibration can be prevented from being transmitted to the user's hand. Therefore, although it is an electric razor provided with the head part 3 to be vibrated, the comfort at the time of use can be improved. There is also a secondary advantage that the face can be massaged when cutting the beard.

  When the output shaft 25 protrudes from both ends of the motor 20, the power transmission mechanism for the inner blade 16 is provided at one end, and the vibration generating structure 50 is provided at the other end, the motor 20 that drives the inner blade 16 is used. Thus, the vibration generating structure 50 can be driven. Therefore, it is not necessary to prepare a dedicated motor for the vibration generating structure 50, and the function of the electric razor can be improved while reducing the number of parts, and the weight of the electric razor can be reduced.

  The vibration generating structure 50 is configured by the motors 20 and 71 and the eccentric weights 51 and 72 that are rotationally driven by the motors 20 and 71, and vibration is generated by the inertial second moment when the eccentric weights 51 and 72 rotate. According to the type of electric razor, as will be described later, it is possible to vibrate the head portion 3 more smoothly than in the case of forcibly reciprocating the vibration generating weight 60 with the eccentric cam 62, and the motor 20. It is excellent in versatility in that it can be applied without problems even when the 71 is rotationally driven at a high speed.

  A power transmission mechanism is disposed at one end of the output shaft 25 of the motor 20, an eccentric weight 51 is disposed at the other end of the output shaft 25, and the eccentric weight 51 is rotationally driven using the inner blade driving motor 20. According to the vibration generating structure 50, since the vibration generating structure 50 can be driven using the inner blade driving motor 20, there is no need to prepare a dedicated motor, and the number of parts can be reduced while reducing the number of parts. The function of the razor is improved, and the weight of the electric razor can be reduced. Since the vibration is generated by utilizing the rotational operation of the eccentric weight 51, the load variation of the eccentric weight 51 with respect to the motor 20 at the time of vibration is almost uniform, compared with a vibration structure in which the load changes shockably. The power transmission to the inner blade 16 can be performed more smoothly.

  According to the electric razor in which the motor 20 is disposed horizontally on the head portion 3, the vibration generating structure 50 can be driven using the motor 20 that drives the inner blade 16, and it is necessary to prepare a dedicated motor for the vibration generating structure 50. It is possible to improve the function of the electric razor while reducing the number of parts by as much as possible, and to realize weight reduction. Since the motor 20 is placed horizontally, the head portion 3 having a small vertical dimension can be configured, and the head portion 3 is vibrated in a direction perpendicular to the rotation center axis of the motor 20 such as the vertical direction and the front-rear direction to Can be shaken effectively.

  The exciter structure 50 includes an exciter weight 60 that is guided and supported slidably up and down, an eccentric cam 62 that reciprocates the exciter weight 60 up and down, and a motor 20 that rotationally drives the eccentric cam 62. According to the electric razor that generates the vibration by the motion inertia force when the weight 60 is driven to reciprocate, the head portion 3 can be vibrated with a large amount of vertical components, which is effective for shaking the skin surface. Therefore, it is possible to cut the beard more effectively by causing a mustache that has fallen on the skin surface or by projecting a beard that is buried in the skin surface to the skin surface.

  When the reciprocating cutting blade unit 55 provided on one side of the head unit 3 is composed of a fixed blade 56 and a movable blade 57 fixed to the vibratory weight 60, the cutting blade unit 55 In addition to performing a beard cutting in a form different from that of the main blade, the function of the electric razor can be improved, and the movable blade 57 is reciprocated using the vibrating weight 60. Therefore, the entire structure of the electric shaver can be simplified.

  If the second vibration generating structure 70 including the second motor 71 is arranged inside the head portion 3 and the drive rotational speeds of the motor 20 of the vibration generating structure 50 and the second motor 71 are different, each motor 20 -The skin surface is vibrated by vibrations generated at 71, and the vibrations generated by the vibration generating structure 50 and the second vibration generating structure 70 interfere with each other and resonate strongly intermittently, so that the head portion 3 has a comfortable rhythm. Since the surface can be shaken and various vibrations can be applied to the skin surface, the whiskers can be effectively raised or protruded from the skin surface, cutting the whiskers faster and shorter, allowing deep shave It becomes.

  When the second vibration structure 70 includes a vibration weight 60 that is guided and supported so as to be slidable up and down, and an eccentric cam 62 that reciprocates the vibration weight 60 up and down. The vibration which contains many upper and lower components effective for shaking the skin surface while vibrating 3 is applied to the head portion 3 by the second vibration structure 70, so that the beard cutting can be performed more effectively.

Example 1 FIGS. 1 to 4 show Example 1 of an electric shaver according to the present invention. 2 and 3, the electric razor is float-supported by the egg-shaped main body 1 that also serves as a grip, a pair of left and right support arms 2 that protrude continuously upward from the main body 1, and the support arms 2. And a head portion 3.

  In FIG. 3, the main body 1 includes a front case 1a in which a support arm 2 is integrally formed, a rear case 1b that covers the rear surface of the front case 1a, a decorative cover 1c that covers the rear surface of the rear case 1b, and a front case The switch panel 1d is mounted on the front surface of 1a. Most parts of each support arm 2 are formed integrally with the front case 1a, but the lower rear surface of each support arm 2 is formed integrally with the rear case 1b. The lower portions of the left and right support arms 2 are continuously U-shaped and smoothly merged with the upper portions of the front and rear cases 1a and 1b.

  A circuit board 6 and two secondary batteries 7 are accommodated in a watertight accommodating compartment 5 formed between the front case 1a and the rear case 1b. The two secondary batteries 7 are arranged adjacent to each other in the vertical direction. The inside of the support arm 2 is hollow, and the power supply lead is wired through the hollow portion. A push button type switch button 9 is provided on the upper curved surface of the switch panel 1d. By pressing the switch button 9, a switch mounted on the circuit board 6 can be turned on / off to start or stop a motor 20 described later. Reference numeral 10 denotes a first indicator lamp that lights up when the switch button 9 is turned on, and reference numeral 11 denotes a second indicator lamp that lights up during charging.

  3 and 4, the head unit 3 accommodates the head case 15, the inner blade 16 incorporated in the head case 15, the outer blade 17 and the outer blade holder 18, the inner blade driving motor 20, and the motor 20. The housing 21 and a gear mechanism (power transmission mechanism) that transmits the rotational power of the motor 20 to the inner blade 16 are configured.

  The head case 15 is configured by joining a semi-cylindrical front half 15a and a rear half 15b, which are divided into front and rear, in a cover-to-cover shape (see FIG. 4). A mounting seat 22 for externally mounting the outer blade holder 18 is bulged on the upper surface of the head case 15, and a pair of left and right support legs 23 project from both sides of the lower surface. The support leg 23 is formed in a hollow cylindrical shape, and also serves as a wiring space for the power supply lead. On both the left and right sides of the front half 15a, ring-shaped side walls 24 for receiving a lock release button 42 to be described later are integrally projected.

  The inner blade 16 is a rotary blade, and the shaft portions at both ends thereof are rotatably supported by an inner blade support base 26 mounted on the upper portion of the housing 21. The outer blade 17 is formed of a mesh blade, is held in an arch shape by an outer blade holder 18, and is pulled and biased by a spring unit 19 shown in FIG. By arranging the motor 20 horizontally in the housing 21 and sealing it in a watertight manner, the head portion 3 can be washed with water. The output shaft 25 of the motor 20 protrudes from both sides of the housing 21, the gear mechanism is provided on the right end side, and a vibration generating structure 50 described later is provided on the left end side.

  In FIG. 4, the housing 21 includes a bottomed cylindrical main case 28 that is divided in the left-right direction, a cap 29 that closes the opening of the main case 28, and a clip 30 that clamps and fixes both the members 28 and 29 in an inseparable manner. . In FIG. 1, the joint portion between the main case 28 and the cap 29 is sealed with a packing 31. A seal 32 seals between the main case 28 and the output shaft 25, and a bearing 33 and a seal 34 are disposed between the cap 29 and the output shaft 25.

  The housing 21 housing the motor 20 is sandwiched between the front half 15a and the rear half 15b, engages the joining edges of the both halves 15a and 15b, and fastens the left and right of the upper joining surface with a pair of screws 35. As a result, the head case 15 is integrated. In this assembled state, the joint surface of the head case 15 fastened with the screw 35 fits between the pair of inner blade brackets 36, 36 provided on the main case 28 and the cap 29, so that the housing 21 moves in the left-right direction. Can be regulated. The motor 20, the housing 21, the inner blade bracket 36, the inner blade support 26, the inner blade 16, the gear mechanism, and the like constitute the drive unit D, and a vibration structure 50 described later is incorporated on one side thereof.

  1, the gear mechanism includes a driving gear 38 fixed to the output shaft 25, a final gear 39 fixed to one shaft end of the inner blade 16, and three intermediate gears disposed between the gears 38 and 39. It consists of and. The outer surfaces of these gear groups are covered with a gear cover 40.

  In order to lock and hold the outer blade holder 18 mounted on the mounting seat 22 of the head case 15, a lock release button 42 is disposed on the inner surface of the side wall 24, and its leg portion 43 is fixed to the side wall 24. When the lock release button 42 is pushed in against the elastic force of the leg 43, the engagement state between the lock claw 44 provided on the button and the lock recess 45 provided on the outer blade holder 18 is released. The outer blade holder 18 can be removed from the mounting seat 22.

  The head portion 3 having the above-described configuration is supported in a floating manner by the pair of support arms 2 so that the head portion 3 can move up and down and can tilt left and right. Specifically, as shown in FIG. 1, a pair of support legs 23 are guided and supported by guide holes 46 provided in the left and right support arms 2 so as to be slidable in the vertical direction, and a compression coil spring 47 is fitted over the support legs 23. The entire head unit 3 is pushed up and biased. The lower end side of the spring 47 is received by the upper peripheral wall of the guide hole 46. A stopper claw 48 is formed near the lower end of the support leg 23. By receiving the stopper claw 48 on the lower peripheral wall of the guide hole 46, the head portion 3 can be held without being detached.

  As described above, when the head unit 3 is floated and supported by the pair of support arms 2, the head unit 3 tilts left and right or floats up and down simultaneously, so that the head unit 3 can tilt following the change in the skin surface, The beard cutting can be performed more appropriately without damaging the skin surface. Since the guide hole 46 for supporting the support leg 23 is formed integrally with the left and right support arms 2, the support arm 2 reliably receives the external force acting on the head portion 3. Incidentally, when all the parts of each support arm 2 are divided into the front and rear, the front and rear cases 1a and 1b open back and forth at the joint part of the support arm 2 when an external force in the front and rear direction acts on the head portion 3. There is a possibility that the head unit 3 rattles during use or a smooth floating operation cannot be performed.

  In order to more effectively cut the whiskers during use, the head case 15 has a vibration generating structure 50 that vibrates the head portion 3. The vibration generating structure 50 uses the motor 20 for driving the inner blade described above as a drive source. Specifically, as shown in FIG. 1, an exciter structure 50 is configured by an eccentric weight 51 fixed to the output shaft 25 protruding from the left side of the housing 21 and a motor 20 that rotationally drives the eccentric weight 51. In FIG. 4, an eccentric weight 51 is formed of a rice ball-shaped metal block, and a mounting hole 52 provided near the top of the block is fitted and fixed to the output shaft 25. Thereby, the center of gravity G of the weight can be located at an eccentric position away from the center of the output shaft 25.

  When the center of gravity G of the weight is eccentric with respect to the output shaft 25, vibration is generated by the inertia moment of inertia of the eccentric weight 51 when it is rotationally driven by the motor 20, thereby forcibly vibrating the head unit 3. Can do. Since the driving speed of the motor 20 of this embodiment is 8800 rpm, the vibration acting on the head unit 3 is 147 Hz. The head portion 3 vibrates in all directions of the rotation plane of the eccentric weight 51 including front and rear and up and down directions. However, since the head portion 3 is supported by the floating support structure, the head portion 3 tends to vibrate in the floating direction (up and down direction). Thus, the skin surface can be shaken with a variety of movements in which the floating movement of the head unit 3 and the vibration movement thereof are fused.

  According to the electric razor provided with the above-described vibration generating structure 50, it is possible to cause a mustache that has fallen on the skin surface due to the vibration of the head portion 3, or to shake the skin surface so that the beard protrudes from the skin surface. The whiskers can be cut more quickly and shorter, and the whiskers can be cut more effectively than conventional electric shavers. Furthermore, since the head portion 3 is floatingly supported by the pair of support arms 2 via the spring 47, it is possible to prevent the vibration from being transmitted to the main body portion 1 while vibrating the head portion 3. Therefore, it is possible to reliably prevent vibration from being transmitted to the hand holding the main body 1.

  There is also an advantage that the head part 3 that is supported in a floating manner can be deeply swung by vibrating the skin surface with the outer blade 17 by vertically vibrating in the floating direction. Since the vibration generated in the vibration generating structure 50 is transmitted from the drive unit D to the outer blade 17 and the skin surface that is in close contact with the outer blade 17 is vibrated, the outer blade 17 remains in close contact with the inner blade 16 and remains on the skin surface. Cutting whiskers while applying vibration. That is, whiskers can be cut effectively by shaking the skin surface while maintaining the sharpness. Since the outer blade 17 is always pulled and urged by the spring unit 19, even when vibration is applied, the outer blade 17 can be always kept in close contact with the inner blade 16 and can maintain a sharp sharpness.

Example 2 FIG. 5 shows Example 2 of the present invention. There, a reciprocating cutting blade unit 55 is provided on one side of the head portion 3, and the vibration generating structure 50 is configured using the cutting blade unit 55. The cutting blade unit 55 includes an outer blade (fixed blade) 56 made of a mesh blade, an inner blade (movable blade) 57, and a holder 58 that keeps the outer blade 56 in an arch shape. The inner blade 57 is driven to reciprocate by a cam mechanism that converts to reciprocating power.

  The inner blade 57 is configured by fixing a group of small blades 57 a to the vibrating weight 60. The vibratory weight 60 is composed of a rectangular parallelepiped metal block that is long in the vertical direction, and its front and rear surfaces are guided and supported by a guide plate 61 fixed to the head case 15 so as to be vertically slidable. The cam mechanism includes an eccentric cam 62 fixed to the output shaft 25 and a horizontal cam groove 64 engaged with a drive pin 63 fixed to the eccentric cam 62. The cam groove 64 is notched in the vibration generating weight 60. The vibration generating structure 50 includes a cam mechanism, a vibration generating weight 60 that is reciprocated up and down by the cam mechanism, and the motor 20.

  Others are substantially the same as those of the first embodiment, and the same members are denoted by the same reference numerals and the description thereof is omitted. The same applies to other embodiments below. As described above, when the vibration generating weight 60 is reciprocated up and down by the motor 20, the head portion 3 can be vibrated and the outer blade 17 can be vibrated in a direction substantially perpendicular to the skin surface. As with a razor, whiskers can be cut effectively. Since the direction of vibration of the head part 3 is concentrated in the vertical direction, the skin surface can be vibrated efficiently and deepened more effectively. Note that the vibration period of the head unit 3 coincides with the rotation period of the output shaft 25.

Example 3 FIG. 6 shows Example 3 of the present invention. There, a second vibration structure 70 is arranged inside the head portion 3 of the first embodiment separately from the vibration structure 50, and the skin surface is caused by vibrations individually generated by both vibration structures 50 and 70. A variety of vibrations can be applied to the skin surface due to the vibration and the resonance action of the vibrations generated by the two vibrating structures 50 and 70. The second vibration generating structure 70 includes a second motor (motor) 71 and an eccentric weight 72 fixed to the output shaft thereof. The second motor 71 is fixed to the outer surface of the gear cover 40, and the motor 20 is driven at 8800 rpm, whereas the second motor 71 is driven at 8500 rpm.

  The second vibration structure 70 can be configured in the same manner as the reciprocating vibration structure described in the second embodiment. Specifically, the second vibration generating structure 70 is constituted by the vibration generating weight 60 that is guided and supported by the head case 15 so that only the vertical sliding movement is freely possible, the eccentric cam 62 that reciprocates the vibration generating weight 50 up and down, and the motor 20. . In this case, the output shaft 25 to which the driving gear 38 is fixed is extended, and the eccentric cam 62 is fixed to the extended portion. Of course, the eccentric cam 62 may be rotationally driven by the second motor 71.

Example 4 FIGS. 7 and 8 show Example 4 of the present invention. In this case, the head unit 3 is floatably supported by the main body unit 1 so as to be movable up and down and tilted left and right, and the inner blade 16 is rotationally driven by a motor 20 placed vertically in the head unit 3. Further, a reciprocating vibration generating structure 50 is provided on the lower surface of the motor 20 so that the head part 3 can be vibrated up and down. Further, a reciprocating vibration of the vibration generating structure 50 is used to place the head part 3 on the rear surface of the main body 1. The sliding blade unit 75 is driven.

  The power transmission mechanism for driving the inner blade includes a driving gear 38 fixed to the output shaft 25 of the motor 20, a face gear 76, two intermediate gears, a final gear 39, and the like. The wrinkle blade unit 75 includes a holder 83, a fixed blade 84, a movable blade 85, and the like, and the entire unit can be displaced up and down.

  The vibration generating structure 50 reciprocates the rocking frame 79 with an L-shaped rocking frame 79 supported by a shaft 78 so as to be swingable left and right, a vibration weight 80 fixed to one side of the rocking frame 79, and the rocking frame 79. It comprises an eccentric cam 81 to be driven, a motor 20 and the like. When the swing frame 79 is reciprocated left and right by an eccentric cam 81 fixed to the lower end of the output shaft 25, the vibration generating weight 80 is reciprocated up and down to generate vertical vibration.

  In order to transmit the reciprocating motion of the swing frame 79 to the blade unit 75, a relay lever 86 that swings together with the swing frame 79 is provided between the both 75 and 79. The relay lever 86 is supported by a shaft 87 so as to be able to swing left and right, and a lower lever portion thereof is engaged and connected to a swing frame 79. When the kakizori blade unit 75 is switched from the standby posture shown by the solid line to the use posture shown by the imaginary line, the passive piece of the movable blade 85 can be engaged with the drive groove 88 of the relay lever 86 and inherit the reciprocating power. .

  In addition to the above embodiments, the present invention can also be applied to an electric razor including a reciprocating drive type inner blade 16. The direction of vibration by the vibration generating structure may include at least one of front and rear, left and right, and top and bottom. The head unit 3 may be supported by the main body unit 1 so that it can float at least in the vertical direction. The second motor 71 of the second vibration structure 70 described in the third embodiment can be fixed to the side wall 24 of the head case 15.

  In the reciprocating vibration generating structure 50 described in the second embodiment, the vibrator provided with the cam groove 64 and the eccentric cam 62 convert the rotational operation of the output shaft 25 into reciprocating power, and then the vibrator generates vibration. The vibration weight 60 can be driven back and forth. Furthermore, the vibratory weight 60 can be integrally provided on the vibrator. The vibration generating weight 60 may be a plastic molded product in which metal particles are mixed or a plastic-only molded product.

A longitudinal front view showing the internal structure of the head part of Example 1 Front view of the electric razor of Example 1 Longitudinal side view of the electric razor of Example 1 Longitudinal front view of the head part of Example 1 Longitudinal front view of the head part of Example 2 Longitudinal front view of the head part of Example 3 Schematic longitudinal front view of the head part of Example 4 Fig. 7 vertical side view

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main-body part 3 Head part 15 Head case 16 Inner blade 17 Outer blade 20 Motor 25 Output shaft 50 Excitation structure 51 Eccentric weight 55 Cutting blade unit 56 Fixed blade 57 Movable blade 60 Excitation weight 62 Eccentric cam 70 2nd excitation structure 71 Second motor 72 Eccentric weight

Claims (8)

The head portion (3) is supported by the main body portion (1) which also serves as a grip so as to float at least in the vertical direction.
The head portion (3) includes an inner blade (16), an outer blade (17), a motor (20) that drives the inner blade (16), and a power transmission mechanism that transmits motor power to the inner blade (16). Is provided,
Inside the head portion (3), the excitation structure (50) for vibrating the head portion (3) at least in the vertical direction Ri is arranged tare,
The vibration generating structure (50) is a reciprocating type cutting blade unit (55) provided on one side of the head portion (3).
The electric razor, wherein the cutting blade unit (55) includes a fixed blade (56) and a movable blade (57) fixed to the vibratory weight (60) . A motor (20) for driving the inner blade (16) is disposed on the head portion (3), and output shafts (25) are projected from both ends of the motor (20).
The electric shaver according to claim 1, wherein a power transmission mechanism for the inner blade (16) is provided at one end of the output shaft (25), and a vibration generating structure (50) is provided at the other end of the output shaft (25).   The electric shaver according to claim 1, wherein the vibration generating structure (50) includes a motor (20, 71) and an eccentric weight (51, 72) driven to rotate by the motor (20, 71).   The electric shaver according to claim 3, wherein a power transmission mechanism is disposed at one end of the output shaft (25) of the motor (20), and an eccentric weight (51) is disposed at the other end of the output shaft (25). A motor (20) for driving the inner blade (16) is disposed horizontally on the head portion (3), and output shafts (25) are projected from both side ends of the motor (20).
The electric shaver according to claim 3 or 4, wherein a power transmission mechanism is disposed at one end of the output shaft (25), and a vibration generating structure (50) is disposed at the other end of the output shaft (25).   The vibration generating structure (50) includes a vibration generating weight (60) guided and supported by the head case (15) so as to be vertically slidable, an eccentric cam (62) for reciprocating the vibration generating weight (60) up and down, and an eccentricity. The electric razor according to claim 1, further comprising a motor (20) for rotationally driving the cam (62). A second vibration structure (70) including a second motor (71) is disposed inside the head portion (3),
The electric shaver according to claim 3, wherein the drive rotational speeds of the motor (20) of the vibration generating structure (50) and the second motor (71) are different . The second vibrating structure (70) includes a vibrating weight (60) that is guided and supported by the head case (15) so as to be slidable up and down, and an eccentric cam (62) that reciprocally drives the vibrating weight (60) up and down. The electric razor according to claim 7, comprising:

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