JP7358024B2 - electric razor - Google Patents

Description

The present invention relates to an electric shaver in which the driving speed of a cutting blade can be changed by a user's operation.

This type of electric shaver is disclosed in Patent Document 1, for example. The electric shaver described in this document includes a vertically long main body case that also serves as a grip, and a razor head supported at the upper part of the main body case. A cutting blade consisting of a fixed blade (outer blade) and a movable blade (inner blade) is provided at the top of the razor head, and the movable blade is driven by a motor housed in the main body case. The power switch for driving the motor is located approximately in the center of the front of the main body case, and just below it is a dial-shaped volume that serves as a means of setting the motor's rotation speed, along with the rotation speed display. It is located. When the user turns on the power switch, the control unit of the electric shaver drives the motor at the rotation speed set by the volume control.

Japanese Unexamined Patent Publication No. 63-203180

When shaving with an electric razor, the optimal cutting blade drive speed (motor rotation speed) may differ depending on the area of the face, such as under the nose or chin. Therefore, some users may desire to change the driving speed of the cutting blade each time they move the electric shaver to another location. In the electric shaver of Patent Document 1, a volume serving as a rotation speed setting means is arranged on the front surface of the main body case, and the user adjusts the cutting blade to a desired driving speed by pinching and operating the volume with his or her fingertips. be able to. However, some users may find it troublesome to have to turn the volume every time they adjust the drive speed. Additionally, there is a risk that the user's fingers may accidentally touch the volume while shaving, causing the drive speed of the cutting blade to change against the user's wishes.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electric shaver in which the driving speed of the cutting blade, that is, the rotation speed of the motor can be easily adjusted.

The electric shaver of the present invention includes a main body case 1 that also serves as a grip, a power switch 10 for turning on the power, a cutting blade 3 including a movable blade 4, a motor 6 that drives the movable blade 4, and a main body case that is caused by an external force. 1 and a vibration sensor 17 that senses the vibration of the sensor 1. The motor 6 is configured to change speed in accordance with a detection signal output by the vibration sensor 17. The motor 6 is not started only by turning on the power switch 10, but is started only after the main body case 1 is vibrated.

The electric razor includes a main body case 1 that also serves as a grip, a power switch 10 for turning on the power, a cutting blade 3 including a movable blade 4, a motor 6 that drives the movable blade 4, and a vibration of the main body case 1 caused by external force. and a vibration sensor 17 that senses the vibration. The speed of the motor 6 is changed according to the detection signal output by the vibration sensor 17.

When the direction in which the electric razor is moved along the skin surface during shaving is defined as the shaving direction, the detection direction of the vibration sensor 17 is set in a direction different from the shaving direction. It can be configured such that when the vibration sensor 17 senses vibration in the detection direction, a detection signal is output from the vibration sensor 17, and the speed of the motor 6 is changed according to the detection signal.

When the vibration sensor 17 senses vibration in one direction of the detection direction, the motor 6 is accelerated, and when the vibration sensor 17 senses vibration in the other direction of the detection direction, the motor 6 accelerates. It can be configured to decelerate.

When a predetermined vibration is applied to the main body case 1 and the vibration sensor 17 senses the vibration while the power of the electric shaver is off, the electric shaver enters a locked state in which the on operation of the power switch 10 is disabled. can be configured to migrate.

In the locked state, when an unlocking operation is performed in which the power switch 10 is operated in a predetermined manner, the locked state can be released.

The vibration sensor 17 can be placed above the vertical center of the main body case 1.

The power switch 10 can be configured with a touch sensor 10A that is provided on the surface of the main body case 1 and detects contact with a human body.

It can be configured such that the motor 6 is accelerated more as the vibration in one of the detection directions sensed by the vibration sensor 17 is larger.

The motor 6 can be configured to be decelerated to a greater extent as the vibration in the other direction relative to the detection direction sensed by the vibration sensor 17 is larger.

The electric shaver according to the present invention is provided with a vibration sensor 17 that detects vibrations of the main body case 1 caused by external force, and is configured so that the speed of the motor 6 is changed according to a detection signal outputted by the vibration sensor 17. , the user can change the speed of the motor 6 and adjust the rotation speed by simply performing a simple operation of intentionally shaking the main body case 1.

The electric shaver is provided with a vibration sensor 17 that detects vibrations of the main body case 1 caused by external force, and is configured so that the speed of the motor 6 is changed according to a detection signal outputted by the vibration sensor 17. By performing a simple operation of intentionally shaking the main body case 1, the speed of the motor 6 can be changed and the rotation speed can be adjusted.

When the vibration sensor 17 senses vibration in a direction different from the shaving direction, a detection signal is output from the vibration sensor 17, and the speed of the motor 6 is changed according to the detection signal. The speed of the motor 6 is not changed by the operation of moving the electric razor in the direction of the hair, and it is possible to prevent the rotational speed of the motor 6 from being adjusted inadvertently when shaving with the electric razor.

The motor 6 is configured to accelerate when the vibration sensor 17 senses vibration in one direction of the detection direction, and to decelerate the motor 6 when vibration in the other direction of the detection direction is detected. When the motor 6 is detected, the user can accelerate or decelerate the motor 6 to adjust the rotation speed to a desired speed by simply shaking the main case 1 in one direction or the other. When one direction and the other direction are set to be exactly opposite, it is possible to more reliably prevent erroneous operation due to misunderstanding and confusion of acceleration operation and deceleration operation.

According to the electric shaver that can be shifted to the locked state, it is possible to reliably prevent the power switch 10 from being switched to the on state due to careless operation while carrying the shaver. Then, when the power of the electric shaver is off, a predetermined vibration is applied to the main body case 1, and when the vibration is detected by the vibration sensor 17, the shaver shifts to the locked state. Since a dedicated switch for shifting to the locked state is not required, the number of parts does not increase due to the addition of a locking function, which contributes to cost reduction.

When the unlock operation for releasing the locked state is the operation of the power switch 10, the user can smoothly perform a series of operations from unlocking to turning on the power without moving his/her finger from the power switch 10. Furthermore, since a dedicated switch for unlocking is not required, the number of parts does not increase, which contributes to cost reduction.

If the vibration sensor 17 is arranged above the vertical center of the main body case 1, when the user grips the lower half of the main body case 1 to shave, the distance from the user's hand to the vibration sensor 17 is The vertical distance can be made longer. If the distance in the vertical direction from the user's hand to the vibration sensor 17 can be increased in this way, the amplitude of vibration of the vibration sensor 17 when the electric shaver is rocked around the user's hand can be increased. Therefore, it is possible to operate the vibration sensor 17 reliably during the swinging operation, and the rotation speed of the motor 6 can be adjusted more reliably.

When the power switch 10 is configured with the touch sensor 10A on the surface of the main body case 1, when the user simply grasps the main body case 1, the touch sensor 10A detects the user's hand and the power is turned on. The user does not have to consciously operate the power switch 10, and can quickly start up the electric shaver. Moreover, when the power switch 10 is configured with the touch sensor 10A, a simple design is achieved in which no apparent switch is omitted from the surface of the main body case 1, and the aesthetic appearance of the main body case 1 is improved.

If the configuration is such that the larger the vibration in one of the detection directions sensed by the vibration sensor 17, the greater the acceleration of the motor 6, the user will be able to accelerate the motor 6 by moving the body case. The number of rotations of the motor 6 can be easily adjusted by adjusting the strength of the vibration, such as shaking the motor 1 strongly and shaking it weakly when you want to accelerate the motor 6 a little.

If the configuration is such that the larger the vibration in the other direction relative to the detection direction sensed by the vibration sensor 17, the more the motor 6 will be decelerated, the user will be able to decelerate the motor 6 by moving the main body case. The rotational speed of the motor 6 can be easily adjusted by adjusting the strength of the vibration, such as shaking the motor 1 strongly and shaking it weakly when you want to slow down the motor 6 a little.

1 is a front view of an electric shaver according to Example 1. FIG. It is a side view of an electric shaver. It is a block diagram of a control system of an electric shaver. 5 is a timing chart showing an example of transition of a target rotation speed of a motor. 5 is a timing chart for explaining a locked state. 7 is a timing chart for explaining the operation of the electric shaver according to the second embodiment. 12 is a timing chart for explaining the operation of the electric shaver according to the third embodiment. FIG. 4 is a front view of an electric shaver according to Example 4. FIG. 7 is an internal structure diagram of a vibration sensor for an electric shaver according to a fifth embodiment. FIG. 7 is an internal structure diagram of a vibration sensor for an electric shaver according to a sixth embodiment. 7 is a timing chart for explaining the operation of the electric shaver according to the seventh embodiment. FIG. 7 is an internal structure diagram of a vibration sensor for an electric shaver according to Example 8. FIG. 7 is an internal structure diagram of a vibration sensor for an electric shaver according to a ninth embodiment.

(Example 1) FIGS. 1 to 5 show Example 1 applied to a rotary electric shaver. In this embodiment, front and back, left and right, and up and down follow the cross arrows shown in FIGS. 1 and 2 and the front and back, left and right, and up and down indications written near each arrow. In both figures, the electric shaver includes a vertically long main body case 1 which also serves as a grip, and a razor head 2 supported at the upper part of the main body case 1. The razor head 2 can move up and down with respect to the main body case 1, and can also tilt in the front-rear direction and left-right direction. A cutting blade 3 is arranged at the top of the razor head 2, and the cutting blade 3 includes an inner blade (movable blade) 4 that rotates around a horizontal axis, and a mesh-shaped outer blade 5 that circumscribes the inner blade 4. Consists of. The inner cutter 4 is driven by a motor 6 with a speed reducer housed in the upper part of the main body case 1. A secondary battery 7, which is a driving source for the motor 6, is housed in the lower part of the main body case 1 together with a vertically elongated control board 8.

In the lower half of the main body case 1 (below the vertical center), a power switch 10 for turning on the power and a display section 13 are arranged in the order listed from top to bottom. The power switch 10 includes a power operation section 11 provided on the front wall of the main body case 1, and a switch element 12 mounted on the front surface of the control board 8 and located on the inner side of the power operation section 11. A user can switch the motor 6 between a driving state and a stopped state by pressing the switch element 12 via the power supply operation unit 11. The display unit 13 includes five vertically arranged LEDs (light sources) 14 mounted on the front surface of the control board 8 and a vertically elongated light-transmitting window 15 provided on the front wall of the main body case 1 and directly facing each LED 14. The user can visually recognize the light emitted from each LED 14 through the transparent window 15. The display unit 13 displays the number of rotations of the motor 6, the remaining amount of the secondary battery 7, etc., depending on the selection and number of LEDs 14 to be lit.

A vibration sensor 17 made of a commercially available acceleration sensor is built in in front of the motor 6 in the upper part of the main body case 1, and is connected to the control board 8 by a lead wire (not shown). When the vibration sensor 17 detects a relatively large vibration caused by an external force acting on the main body case 1, that is, vibration caused by the user shaking the main body case 1 intentionally, the vibration sensor 17 generates a speed change signal to change the speed of the motor 6. Outputs a certain detection signal. Relatively small vibrations caused by driving the motor 6, etc., are not detected by the vibration sensor 17, or even if they are detected, the vibration sensor 17 does not output a speed change signal based on the vibrations.

The front-back direction is the direction in which the electric razor is moved along the skin surface during shaving, that is, the shaving direction, and the up-down direction and left-right direction, which are directions different from the front-back direction, are the directions in which the vibration sensor 17 The detection direction is set. There are two types of detection signals output by the vibration sensor 17: an acceleration signal that accelerates the motor 6 and a deceleration signal that decelerates the motor 6. A signal is output. In this electric shaver, the upward and left directions are set as acceleration directions, and when the vibration sensor 17 senses vibrations in the same directions, an acceleration signal is output. Further, directions opposite to the acceleration direction, that is, downward and right directions, are set as deceleration directions, and when the vibration sensor 17 senses vibration in the same direction, a deceleration signal is output. As mentioned above, the forward and backward directions coincide with the direction in which the electric razor is moved along the skin surface during shaving, that is, the shaving direction, so these directions are set in the acceleration and deceleration directions. Therefore, the vibration sensor 17 does not output a speed change signal based on the movement of the electric razor during shaving. Therefore, the speed of the motor 6 will not be changed carelessly during shaving.

As shown in FIG. 3, the control section 20 includes a motor drive control means 21 that drives and controls the motor 6, a display control means 24 that controls each LED 14 of the display section 13, and the like. The motor drive control means 21 includes a speed setting section 26 that sets a target rotation speed R of the motor 6, and a voltage control section 27 that controls the voltage applied to the motor 6 according to the target rotation speed R. The display control means 24 causes the display section 13 to display the target rotation speed R of the motor 6 set by the speed setting section 26.

When the user presses the power switch 10 in the off state of the electric shaver, that is, turns on the power switch 10, the speed setting section 26 sets the target rotation speed R of the motor 6 to a predetermined reference rotation speed R0, and the voltage control section 27 sets the target rotation speed R of the motor 6 to a predetermined reference rotation speed R0. A voltage corresponding to the number R0 is applied to the motor 6. As a result, the motor 6 starts driving. When the user vibrates the main body case 1 in the acceleration direction or deceleration direction while the motor 6 is in the driving state, the vibration sensor 17 senses the vibration and outputs a speed change signal (acceleration signal or deceleration signal) to the speed setting section 26. However, the speed setting section 26 changes the target rotation speed R according to the speed change signal, and the voltage control section 27 applies a voltage to the motor 6 according to the changed target rotation speed R.

The reference rotational speed R0 of the motor 6 matches the minimum rotational speed, and even if a deceleration signal is output from the vibration sensor 17 when the target rotational speed R is the reference rotational speed R0, the speed setting unit 26 does not set the target rotational speed. R is maintained at the reference rotation speed R0. Regarding the target rotation speed R, a predetermined maximum rotation speed R1 (R0<R1) is set in advance in addition to the reference rotation speed R0. Even if an acceleration signal is output from the vibration sensor 17 when the target rotation speed R is the maximum rotation speed R1, the speed setting unit 26 maintains the target rotation speed R at the maximum rotation speed R1.

The timing chart in FIG. 4 shows an example of a change in the target rotation speed R of the motor 6. At the first time point t1, the power switch 10 is turned on and the speed setting section 26 sets the target rotation speed R to the reference rotation speed R0. From the next time point t2 to time point t3, the vibration sensor 17 outputs an acceleration signal multiple times, and the target rotational speed R increases stepwise with each output. From the next time point t4 to time point t5, the vibration sensor 17 outputs a deceleration signal multiple times, and the target rotational speed R decreases stepwise with each output. At the final time point t6, the power switch 10 is turned off and the target rotation speed R is set to zero. When the target rotational speed R becomes zero, the voltage application by the voltage control section 27 is interrupted and the motor 6 is stopped.

In the electric shaver according to the present embodiment, when a predetermined locking operation is performed while the motor 6 is in a stopped state, the electric shaver shifts to a locked state in which the ON operation of the power switch 10 is disabled, and a predetermined unlocking operation is performed in the locked state. The device is configured such that the locked state is released when the locking operation is performed. The lock operation is an operation to vibrate the main body case 1, and the unlock operation is a long press operation on the power switch 10.

FIG. 5 shows the timing chart of FIG. 4 after time t6, and at the next time t7 and time t8, the vibration sensor 17 continuously senses (turns on) vibrations of a predetermined magnitude or more with a short time lag. , the state is switched to the locked state at time t8 when the second vibration is detected. In other words, upon receiving the first vibration operation at time t7, the control unit 20 switches to a lock standby state in which a lock operation can be accepted, and upon receiving the second vibration operation (lock operation) at time t8 immediately thereafter. and has entered the locked state. At the next time point t9, the power switch 10 is pressed briefly, but the motor 6 is not activated because it is in the locked state.

At the next time t10, an unlocking operation (long press operation of the power switch 10) is started, and at the next time t11, the long press time reaches a specified time and the locked state is released. At the next time t12, the power switch 10 is turned on and the motor 6 is activated. In this way, by making it possible to release the locked state by pressing and holding the power switch 10, the user can smoothly perform a series of operations from unlocking to turning on the power without moving his or her finger from the power switch 10. . Note that it is also possible to set the motor 6 to start at the same time as the unlocking operation at time t11 is completed.

(Embodiment 2) In Embodiment 2 (the present invention) shown in FIG. 6, the motor 6 does not start only when the user turns on the power switch 10, and only after the user performs a vibration operation on the main body case 1. This embodiment differs from the first embodiment in that the motor 6 is activated. As shown in the timing chart of the figure, when the power switch 10 is turned on (time t21), the power is switched from the off state to the on state without starting the motor 6. The fact that the power has been turned on can be notified to the user by, for example, lighting the display unit 13. In this embodiment, the power-on state is a standby state in which the motor 6 can be started by a vibration operation on the main body case 1, and the power-off state is a standby state in which the motor 6 can be started by a vibration operation on the main body case 1. This is a dormant state in which the motor 6 cannot be started even if the motor 6 is turned on.

At the next time point t22, an acceleration signal is output from the vibration sensor 17, and the motor 6 is started with the reference rotation speed R0 set as the target rotation speed R. Note that even if a deceleration signal is output in place of the acceleration signal while the power is on, the motor 6 starts at the same rotation speed. From the next time point t23 to time point t24, the vibration sensor 17 outputs an acceleration signal and a deceleration signal multiple times, and the target rotational speed R increases or decreases stepwise for each output. At the next time point t25, the power switch 10 is turned off, the motor 6 stops, and the power is turned off. The fact that the power has been switched to the off state can be notified to the user by, for example, turning off the display unit 13. At the final time point t26, an acceleration signal is output from the vibration sensor 17, but the motor 6 is not activated because the power is off. Since the rest is the same as in Example 1, the explanation thereof will be omitted. The same applies to the following examples.

(Third Embodiment) A third embodiment shown in FIG. 7 differs from the first embodiment described above in that the vibration sensor 17 outputs a reset signal instead of a deceleration signal. In other words, the vibration sensor 17 outputs an acceleration signal when it detects a vibration in the acceleration direction (upward and leftward), but it outputs an acceleration signal when the vibration sensor 17 detects a vibration in the downward and rightward directions opposite to the acceleration direction. When vibration is detected, a reset signal is outputted to return the target rotation speed R of the motor 6 to the reference rotation speed R0. As shown in the timing chart of the same figure, the startup and acceleration of the motor 6 (times t31 to t33) are the same as in the first embodiment (times t1 to t3 in FIG. 4), but at the next time t34, the vibration sensing sensor 17 outputs a reset signal, and the target rotational speed R suddenly drops to the reference rotational speed R0. From the next time t35 to t37, the target rotational speed R is controlled in the same way as from time t32 to t34.

(Embodiment 4) Embodiment 4 shown in FIG. 8 differs from the previous embodiment 1 in that the power switch 10 includes a capacitive touch sensor 10A that detects human contact. A grip part 1a consisting of an inwardly concave constricted part is provided in the middle of the main body case 1 in the vertical direction, and touch sensors 10A are arranged on each of the left and right sides of the grip part 1a. According to this embodiment, the touch sensor 10A detects the user's hand and the power is switched on when the user simply grasps the grip portion 1a of the main body case 1. Therefore, the user consciously presses the power switch 10. There is no need to operate the electric shaver and you can start it up quickly. The space occupied by the power supply operation section 11 in the first embodiment can be utilized by, for example, expanding the display section 13 upward.

(Example 5) Example 5 shown in FIG. 9 differs from Example 1 described above in the structure of the vibration sensor 17. The vibration sensor 17 here includes a horizontally long bar magnet 30 and a coil 31 surrounding the bar magnet 30. The bar magnet 30 is movable in the left-right direction relative to the coil 31, and is normally urged to a neutral position at the center between the left and right sides by a biasing means 32 such as a spring. No current flows through the coil 31 while the bar magnet 30 is stationary, but when the user shakes the main body case 1 in the left and right direction, the bar magnet 30 moves relatively and current flows through the coil 31. When the main body case 1 is swung to the left (acceleration direction), that is, the bar magnet 30 moves to the right, and when the main body case 1 is swung to the right (deceleration direction), that is, the bar magnet 30 moves to the left. Since the direction of the current flowing through the coil 31 is different when the main body case 1 is moved, the direction of vibration of the main body case 1 is sensed based on this, and an acceleration signal or a deceleration signal corresponding to the direction is output. The vibration sensor 17 according to this embodiment can only sense vibrations of the main body case 1 in the left-right direction.

(Example 6) Example 6 shown in FIG. 10 also differs from Example 1 in the structure of the vibration sensor 17. The vibration sensor 17 here is composed of a proximity sensor including two detection parts 35 and one detected part 36, and the detection part 35 is arranged so as to sandwich the detected part 36 from both left and right sides. ing. The detected part 36 is movable in the left-right direction relative to the detection part 35, and is normally urged by a biasing means 37 such as a spring to a neutral position in the center of the left and right spaced apart from both the detection parts 35. . When the user shakes the main body case 1 to the left (acceleration direction), the detected part 36 moves to the right, and the detection part 35 on the right side, which detects this, outputs an acceleration signal. Conversely, when the user swings the main body case 1 to the right (deceleration direction), the detected part 36 moves to the left, and the left detection part 35 that detects this moves to the left and outputs a deceleration signal. The vibration sensor 17 according to this embodiment can also sense only the vibration of the main body case 1 in the left-right direction.

(Example 7) Example 7 shown in FIG. 11 differs from Example 1 described above in that the vibration sensor 17 senses the strength of vibration in addition to the direction of vibration. The vibration sensor 17, which is an acceleration sensor, has three levels of vibration strength: "strong," "medium," and "weak" in the acceleration direction (upward and leftward) and deceleration direction (downward and rightward). and outputs an acceleration or deceleration signal depending on its strength. In other words, as shown in the timing chart of the same figure, the stronger the vibration sensed by the vibration sensor 17, the greater the degree of gear change will be output. As a result, the motor 6 is greatly accelerated or decelerated. In this embodiment, when the speed change amount of the motor 6 when the vibration strength is equivalent to "weak" is "1", the speed change amount when the vibration strength is equivalent to "medium" is "2", and when it is equivalent to "strong", the speed change amount is "1". Although the speed change amount is set to "3", this value can be arbitrarily selected. Further, the strength of vibration detected by the vibration sensor 17 is not limited to three levels.

(Example 8) Example 8 shown in FIG. 12 differs from Example 7 in the structure of the vibration sensor 17. The vibration sensor 17 here is constituted by a proximity sensor including six detection sections 40 and one detected section 41. The detection part 40 is provided in the housing 42 of the vibration sensor 17, and the detected part 41 is provided in a slide body 43 that can slide left and right inside the housing 42. In a normal state, the slide body 43 and the detected portion 41 are biased toward a neutral position at the center of the left and right sides by a biasing means 44 such as a spring. One end of each biasing means 44 is fixed to the housing 42, and the other end is movable toward and away from the slide body 43. Three detection units 40 are arranged on each side of the detection unit 41 at the neutral position along the movement stroke of the detection unit 41 . The detected part 41 is detected by one of the detection parts 40 by moving in the left-right direction from the neutral position.

The more the user shakes the main body case 1 to the left (acceleration direction), the more the detected part 41 moves to the right. When the shaking force is equivalent to "strong", the rightmost detection section 40 detects the detected section 41, and when the shaking force is "medium", the second detection section 40 from the right detects the detected section 41. is detected, and when the shaking force is equivalent to "weak", the third detection section 40 from the right detects the detected section 41. Conversely, the more the user swings the main body case 1 to the right (deceleration direction), the more the detected part 41 moves to the left. When the shaking force is equivalent to "strong", the leftmost detection section 40 detects the detected section 41, and when the shaking force is "medium", the second detection section 40 from the left detects the detected section 41. is detected, and when the shaking force is equivalent to "weak", the third detection section 40 from the left detects the detected section 41. Similar to the seventh embodiment, the stronger the vibration sensed by the vibration sensor 17, the greater the acceleration signal or deceleration signal with a greater degree of gear change. The vibration sensor 17 according to this embodiment can only sense vibrations of the main body case 1 in the left-right direction.

(Example 9) Example 9 shown in FIG. 13 also differs from Example 7 in the structure of the vibration sensor 17. The vibration sensor 17 here includes a heavy pressing rod 47 that is long in the left and right directions, and pressure sensors 48 arranged on both left and right sides of the pressing rod 47. The pressing rod 47 is held around its circumferential surface by a holding cylinder 49, and can only slide left and right with respect to the holding cylinder 49. Each pressure sensor 48 includes a pressure receiving surface that directly faces the end surface of the press rod 47, and can detect the magnitude of the pressure received from the press rod 47 in multiple stages (for example, three stages). The more the user shakes the main body case 1 to the left (acceleration direction), the greater pressure acts on the right pressure sensor 48, and an acceleration signal corresponding to the magnitude of the pressure is output. Conversely, the more the user swings the main body case 1 in the right direction (deceleration direction), the greater pressure acts on the left pressure sensor 48, and a deceleration signal corresponding to the magnitude of the pressure is output. The vibration sensor 17 according to this embodiment can also sense only the vibration of the main body case 1 in the left-right direction.

In Example 1 above, the top and left directions of the electric shaver are set as acceleration directions, and the bottom and right directions are set as deceleration directions. The upper direction and the lower direction may be set as deceleration directions. The motor 6 includes a reciprocating linear motor in addition to the rotary motor according to each of the embodiments described above. In addition to the rotary electric shaver according to each of the embodiments described above, the present invention also provides an electric shaver with a reciprocating cutting blade, an electric shaver with a cutting blade consisting only of inner blades (movable blades), or an electric shaver with a main body. The present invention can also be applied to an electric shaver in which a cutting blade 3 is provided at the top of the case 1 (an electric shaver without a razor head 2). Furthermore, in addition to a shaver that mainly cuts beards with outer and inner blades, the electric razor of the present invention also includes an electric clipper that mainly cuts hair with a comb-shaped fixed blade and a comb-shaped movable blade. included.

1 Main body case 2 Razor head 3 Cutting blade 4 Movable blade (inner blade)
5 Outer blade 6 Motor 10 Power switch 17 Vibration sensor

Claims (1)

A main body case (1) that also serves as a grip, a power switch (10) for turning on the power, a cutting blade (3) including a movable blade (4), a motor (6) that drives the movable blade (4), and an external force. and a vibration sensor (17) that detects vibrations of the main body case (1) caused by
The motor (6) is configured to change speed according to the detection signal output by the vibration sensor (17),
The electric shaver is characterized in that the motor (6) does not start only when the power switch (10) is turned on, but only when the main body case (1) is operated to vibrate.