JP7122284B2 - electric razor - Google Patents

Description

The present invention relates to an electric shaver provided with a display for displaying the number of revolutions of a motor.

An electric shaver of this type is disclosed, for example, in Patent Document 1. The electric shaver described in the document includes a vertically long main body case that also serves as a grip, and a razor head that is supported on the top of the main body case. A cutting blade consisting of a fixed blade (outer blade) and a movable blade (inner blade) is provided on 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 immediately below it is a dial-type volume as a means for setting the number of revolutions of the motor, alongside the number of revolutions display. are placed. When the power switch is turned on by the user, the controller of the electric shaver drives the motor at the number of revolutions set by the volume.

JP-A-63-203180

SUMMARY OF THE INVENTION It is an object of the present invention to provide an electric shaver that can easily know the correct number of revolutions when the motor is started.

The present invention comprises a cutting blade 3 including a movable blade 4, a motor 6 for driving the movable blade 4, a battery 7 for supplying driving power to the motor 6, a power switch 10 for turning on the power, and the rotation speed of the motor 6. and a display section 16 for alternatively displaying the remaining amount of the battery 7 . When the power switch 10 is turned on, the motor 6 starts at a predetermined number of revolutions and the number of revolutions is displayed on the display section 16 . It is characterized in that the display unit 16 shifts to display of the remaining amount of the battery 7 when a predetermined rotation speed display time T4 elapses after the rotation speed is displayed.

An acceleration switch 13A for accelerating the motor 6 and a deceleration switch 13B for decelerating the motor 6 are provided. When the acceleration switch 13A or the deceleration switch 13B is operated while the display unit 16 is displaying the remaining amount of the battery 7, the speed of the motor 6 is changed and the display unit 16 shifts to display the rotation speed of the motor 6. and

When the power switch 10 is turned off while the display unit 16 is displaying the number of revolutions of the motor 6, the display unit 16 shifts to display the remaining amount of the battery 7. FIG.

When the power switch 10 is turned on, the motor 6 starts at a predetermined number of revolutions, and the number of revolutions is displayed on the display unit 16. According to the electric shaver, the user can accurately determine the number of revolutions when the motor 6 starts. can be easily known. A user who knows the rotation speed can easily and reliably adjust the motor 6 to a desired rotation speed by operating the acceleration switch 13A or the deceleration switch 13B as necessary. Further, if the display unit 16 is arranged to shift to display the remaining amount of the battery 7 after the predetermined number of rotation display time T4 has elapsed, the user can know the remaining amount of the battery 7 without performing any special operation. becomes possible and convenience is improved.

When the acceleration switch 13A or the deceleration switch 13B is operated while the display unit 16 is displaying the remaining amount of the battery 7, the speed of the motor 6 is changed and the display unit 16 shifts to display the rotation speed of the motor 6. Therefore, the user can easily know the correct rotational speed of the motor 6 after shifting. That is, the user can determine whether further acceleration or deceleration is necessary based on the number of rotations displayed on the display unit 16, and can reliably adjust the number of rotations of the motor 6 to the desired number.

When the power switch 10 is turned off while the display unit 16 is displaying the number of rotations of the motor 6, the display unit 16 shifts to display the remaining amount of the battery 7. The remaining amount of 7 can be surely notified to the user. The user who knows the remaining amount of the battery 7 can take measures such as charging the battery 7 before the next use, if necessary.

1 is a front view of an electric shaver according to Example 1. FIG. 1 is a block diagram of a control system of an electric shaver; FIG. 4 is a graph showing the relationship between the pressing force detected by the shift switch and the target rotational speed of the motor; 4 is a flow chart showing a first deceleration condition; 4 is a flow chart showing a second deceleration condition; 9 is a flowchart showing a third deceleration condition; FIG. 11 is a flow chart showing a fourth deceleration condition; FIG. 4 is a timing chart showing an example of transition between pressing force and target rotation speed; 4 is a flow chart showing a control procedure in a standby state; 4 is a timing chart for explaining a standby state and a locked state; 9 is a timing chart for explaining an electric shaver according to Example 2. FIG. FIG. 11 is a front view of a main part of an electric shaver according to Example 3; It is a timing chart for explaining the same electric shaver. 10 is a timing chart for explaining an electric shaver according to a modified example of Example 3. FIG. 10 is a timing chart for explaining an electric shaver according to Example 4. FIG. FIG. 14 is a timing chart for explaining an electric shaver according to a modification of Example 4; FIG. FIG. 11 is a front view of an electric shaver according to Example 5; FIG. 11 is a front view of an electric shaver according to Example 6; FIG. 11 is a cross-sectional view of a shift switch of an electric shaver according to Embodiment 7; FIG. 11 is a cross-sectional view of a shift switch of an electric shaver according to an eighth embodiment; FIG. 12 is a graph showing the relationship between the pressing force and the target number of rotations of the electric shaver according to Example 9. FIG. It is a timing chart for explaining the same electric shaver. FIG. 11 is a timing chart for explaining an electric shaver according to Example 10. FIG. FIG. 20 is a front view of the essential parts of an electric shaver according to Example 11; It is a timing chart for explaining the same electric shaver. FIG. 20 is a front view of the essential parts of an electric shaver according to Example 12; FIG. 21 is a front view of an electric shaver according to Example 13; FIG. 20 is a front view of a main part of an electric shaver according to Example 14; FIG. 20 is a front view of a main part of an electric shaver according to Example 15; FIG. 30 is a sectional view taken along the line AA in FIG. 29; FIG. 20 is a front view of a main part of an electric shaver according to Example 16; FIG. 32 is a cross-sectional view taken along line BB in FIG. 31; It is explanatory drawing which concerns on the aspect of the display part of the same electric shaver. It is a timing chart for explaining the same electric shaver. It is another timing chart for explaining the same electric shaver. FIG. 21 is an explanatory diagram relating to a mode of a display unit of a first modified example of the sixteenth embodiment; FIG. 21 is a front view of a main part of an electric shaver according to a second modification of Example 16;

(Example 1) Figs. 1 to 10 show a rotary electric shaver. Front and back, left and right, and up and down in this embodiment follow the crossed arrows shown in FIG. In the figure, the electric shaver comprises a vertically long body case 1 that also serves as a grip, and a razor head 2 that is supported on the top of the body case 1 . The razor head 2 is vertically movable with respect to the main body case 1, and is also tiltable in the front-rear direction and the left-right direction. A cutting blade 3 is arranged on the top of the razor head 2. The cutting blade 3 comprises an inner blade (movable blade) 4 that rotates about a horizontal axis and a mesh-like outer blade 5 that circumscribes the inner blade 4. consists of The inner blade 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 of the motor 6 is housed in the lower portion of the main body case 1 together with a vertically long control board 8 .

A power switch 10 for turning on the power is arranged in the lower half of the body case 1 (below the vertical center). The power switch 10 is composed of a power operating portion 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 positioned on the inner surface side of the power operating portion 11 . A user can press the switch element 12 via the power supply operation unit 11 to switch the motor 6 between a driving state and a stopped state. On the other hand, in the upper half of the body case 1 (above the vertical center), a speed change switch 13 for operating the number of rotations of the motor 6 (driving speed of the inner blade 4) is arranged. The shift switch 13 is composed of a shift operation portion 14 provided on the front wall of the main body case 1 and a piezo pressure sensor 15 arranged on the inner surface side of the shift operation portion 14 . The pressure sensor 15 can steplessly detect the magnitude of the pressing force P applied to the surface of the shift operating portion 14, and is connected to the control board 8 by a lead wire (not shown).

A control unit 20 of the electric shaver, which will be described later, controls the number of revolutions of the motor 6 steplessly according to the magnitude of the pressing force P detected by the speed change switch 13 (pressure sensor 15), and changes the number of revolutions to the power switch. 10 is displayed on the display unit 16 below. The display unit 16 is composed of five LEDs (light sources) 17 mounted on the front surface of the control board 8 and arranged vertically, and a vertically long translucent window 18 provided on the front wall of the main body case 1 facing each LED 17 . The user can visually recognize the light emission of each LED 17 through the translucent window 18 . The display unit 16 displays the number of rotations of the motor 6, the remaining amount of the secondary battery 7, and the like, depending on the selection and number of the LEDs 17 to be lit.

In the electric shaver according to this embodiment, the cutting blade 3, the variable speed switch 13, the power switch 10, and the display unit 16 are arranged in order from the top on one virtual vertical plane V passing through the left-right center thereof. The distance D2 between the shift switch 13 and the power switch 10 is set longer than the distance D1 between the cutting blade 3 and the shift switch 13 in . Between the shift switch 13 and the power switch 10 in the body case 1 is formed a grip portion 1a consisting of an inwardly constricted constricted portion. A shift switch 13 is positioned in the vicinity of the fingertip of . Therefore, the user can smoothly operate the shift switch 13 with the thumb. Moreover, if the power switch 10 and the speed change switch 13 are separately positioned above and below the grip portion 1a, when the user operates one of the switches 10 and 13, the finger operating the switch 10 or 13 may be accidentally moved. The inconvenience of operating the other switches 10 and 13 can be reliably prevented.

As shown in FIG. 2, the control unit 20 includes a motor drive control means 21 that drives and controls the motor 6, a motor load detection means 22 that detects the load current L flowing through the motor 6, and the actual rotation speed of the motor 6. It is composed of a motor speed detection means 23 for detecting the number of revolutions F), a display control means 24 for controlling each LED 17 of the display section 16, 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 motor speed detection means 23 estimates the actual rotation speed F of the motor 6 using the voltage applied to the motor 6 by the voltage control section 27 and the load current L detected by the motor load detection means 22 as input factors. It is also possible to configure the motor speed detection means 23 with an encoder or the like to directly detect the actual number of revolutions F of the motor 6 . The display control means 24 causes the display section 16 to display the target rotational speed R of the motor 6 set by the speed setting section 26 . Instead of the target number of revolutions R, the actual number of revolutions F detected by the motor speed detection means 23 may be displayed on the display section 16 .

When the user presses, or turns on, the power switch 10 while the electric shaver is off, the speed setting unit 26 sets the target rotation speed R of the motor 6 to a predetermined reference rotation speed R0, and the voltage control unit 27 sets the reference rotation speed R0. A voltage corresponding to the number R0 is applied to the motor 6. This causes the motor 6 to start driving. When the user presses the speed change switch 13 while the motor 6 is in the driving state, the speed setting unit 26 changes the target rotation speed R according to the magnitude of the pressing force P detected by the speed change switch 13, and the voltage control unit 27 applies to the motor 6 a voltage corresponding to the target rotational speed R after the change.

FIG. 3 shows the relationship between the pressing force P detected by the shift switch 13 and the target rotational speed R of the motor 6 set by the speed setting unit 26. As shown in FIG. A predetermined upper limit pressure P1 is set in advance for the pressing force P, and a predetermined maximum rotation speed R1 (R0<R1) is also set in advance for the target rotation speed R in addition to the reference rotation speed R0. . The target rotation speed R when the pressing force P is zero is set to the reference rotation speed R0, and as the pressing force P increases, the target rotation speed R also increases, and when the pressing force P reaches the upper limit pressing force P1 or more, the target rotation speed is reached. R is uniformly set to the maximum rotation speed R1.

Regarding the reference speed R0 and the maximum speed R1, first to fourth deceleration conditions, which will be described later, are set. A number R0′ (R0>R0′) and a deceleration maximum speed R1′ (R1>R1′) lower than the maximum speed R1 are substituted. In the present embodiment, the reduction widths r of both rotation speeds R0 and R1 are set to be the same (R0-r=R0', R1-r=R1'), but the reduction widths r of both rotation speeds R0 and R1 are different values. Alternatively, only the reference rotation speed R0 may be reduced while maintaining the maximum rotation speed R1.

A first deceleration condition relates to the load on the motor 6 . Specifically, as shown in the flowchart of FIG. 4, when the load current L detected by the motor load detection means 22 reaches a predetermined standard current L1 (YES in step S11), the speed setting unit 26 Assume that shaving has started, and start monitoring the load current L. The standard current L1 is the value of the load current L when the motor 6 is driven in a no-load state (a state in which shaving is not performed and the inner blade 4 is idle), that is, the lower limit current L0 (the low load value in the present invention). equivalent) (L1>L0). After that, when the load current L drops to the lower limit current L0 (YES in step S12), the speed setting unit 26 considers that shaving is almost finished, and lowers the reference rotation speed R0 and the maximum rotation speed R1 (step S13). ).

The second deceleration condition relates to the elapsed time Ta after the motor 6 has started. Specifically, as shown in the flowchart of FIG. 5, the timer (not shown) of the speed setting unit 26 starts timing the elapsed time Ta at the same time when the motor 6 is activated (step S21), and the elapsed time Ta reaches a predetermined value. When the standard required time T1 (for example, 3 minutes) is reached (YES in step S22), the speed setting unit 26 considers that shaving is almost finished, and lowers the reference rotation speed R0 and the maximum rotation speed R1 (step S23).

The third deceleration condition relates to the time during which the target rotation speed R of the motor 6 exceeds the reference rotation speed R0, that is, the high speed rotation time. Specifically, as shown in the flowchart of FIG. 6, when the shift switch 13 detects the pressing force P and the target rotation speed R exceeds the reference rotation speed R0 (YES in step S31), the timer of the speed setting unit 26 is turned off. (not shown) starts counting the elapsed time Tb and the accumulated high speed time Tc (accumulated high speed rotation time) (step S32). When the ratio of the accumulated high speed time Tc to the elapsed time Tb decreases to the predetermined standard high speed rate s (YES in step S33), the speed setting unit 26 determines that the frequency with which the user presses the shift operation unit 14 has decreased, that is, the shaving time has decreased. is almost completed, the reference rotation speed R0 and the maximum rotation speed R1 are lowered (step S34).

A fourth deceleration condition relates to the response time Td required for acceleration of the motor 6 . As the pressing force P detected by the shift switch 13 increases, the speed setting unit 26 increases the target rotation speed R, and the voltage control unit 27 increases the voltage (duty ratio) applied to the motor 6. , there is a short time lag until the actual rotation speed F of the motor 6 reaches the target rotation speed R, and this time lag is called a response time Td. Since the response time Td becomes shorter as the load applied to the motor 6, ie, the user's whiskers, decreases, the remaining amount of whiskers can be estimated based on this response time Td.

Specifically, as shown in the flowchart of FIG. 7, when the difference between the current target rotation speed R and the immediately preceding target rotation speed Rb becomes larger than the specified value d (YES in step S41), the timer of the speed setting unit 26 ( (not shown) starts timing the response time Td (step S42). After that, when the actual number of revolutions F detected by the motor speed detecting means 23 rises to the vicinity of the target number of revolutions R (YES in step S43), the timing of the response time Td is terminated, and this is compared with the standard response time T2. (Step S44). Here, if the response time Td is shorter than the standard response time T2 (YES in step S44), it is assumed that shaving is almost finished, and the reference rotation speed R0 and the maximum rotation speed R1 are decreased (step S45). Conversely, if the response time Td is equal to or greater than the standard response time T2 (NO in step S44), it is assumed that the user's beard still remains, and the reference rotation speed R0 and the maximum rotation speed R1 are not lowered, and step S41 is performed. back to The standard response time T2 is a variable that varies depending on the amount of increase (R−Rb) of the target rotation speed R, and the larger the amount of increase, the longer the standard response time T2 is set.

The timing chart of FIG. 8 shows an example of changes in the target rotational speed R of the motor 6. In FIG. At the first time point t1, the power switch 10 is turned on, and the speed setting unit 26 sets the target rotation speed R to the reference rotation speed R0. At the next time t2, the pressing force P detected by the speed change switch 13 begins to increase, and thereafter, the target rotational speed R increases as the pressing force P increases. At the next time t3, the user releases the finger from the shift operation unit 14, so that the pressing force P detected by the shift switch 13 becomes zero, and the target rotation speed R is reduced to the reference rotation speed R0.

At the next time t4, as one of the deceleration conditions is satisfied, the use of the deceleration reference rotation speed R0′ and the deceleration maximum rotation speed R1′ is started in place of the reference rotation speed R0 and the maximum rotation speed R1. The speed setting unit 26 reduces the target rotation speed R to the deceleration reference rotation speed R0'. At the next time t5 to t6, the target rotation speed R corresponding to the magnitude of the pressing force P is set between the deceleration reference rotation speed R0' and the deceleration maximum rotation speed R1'. At the last time point t7, the power switch 10 is turned off and the target rotational speed R is set to zero. When the target rotation speed R becomes zero, the voltage application by the voltage control unit 27 is interrupted and the motor 6 stops.

When the power switch 10 is turned off, the electric shaver according to this embodiment shifts to a waiting state for a predetermined waiting time T3. Specifically, as shown in the flowchart of FIG. 9, when the power switch 10 is turned off (YES in step S51), the motor 6 is stopped (step S52) and the state is shifted to the standby state, and the motor drive control means 21 timer (not shown) starts counting the elapsed time Te (step S53). Until the elapsed time Te reaches the standby time T3, not only when the power switch 10 is turned on (YES in step S55), but also when the shift switch 13 detects the pressing force P (YES in step S54). , the motor drive control means 21 starts the motor 6 (step S56). After the standby time T3 has elapsed (YES in step S57), the motor 6 is started only when the power switch 10 is turned on (YES in step S58) (step S56).

When a predetermined locking operation is performed while the motor 6 is stopped, the electric shaver shifts to a locked state in which the ON operation of the power switch 10 is disabled, and when a predetermined unlocking operation is performed in the locked state. It is configured to be unlocked. The lock operation is at least one of a long press operation and a double click operation of the shift switch 13, and the unlock operation is a long press operation and a double click operation of the shift switch 13 and a long press operation of the power switch 10. At least one. The locked state may be released by unlocking either one of the power switch 10 and the shift switch 13, and the locked state is released only when both switches 10 and 13 are unlocked. can be set as

At the first time point t11 in the timing chart of FIG. 10, the power switch 10 is turned off, and the motor 6 stops and shifts to the standby state. At the next time t12, the shift switch 13 is pressed before the waiting time T3 has elapsed from time t11, and the motor 6 is restarted (t12-t11<T3). At the next time t13, the power switch 10 is turned off in the same manner as at time t11, and the motor 6 stops and shifts to the standby state. At the next time t14, the power switch 10 and the shift switch 13 are operated. The standby time T3 has passed without any delay (t14-t13=T3). At the next time t15, the speed change switch 13 is pressed in the same manner as at time t12, but the motor 6 is not started because the standby time T3 has passed.

At the next time t16, the lock operation (long-pressing operation of the shift switch 13) is started, and at the next time t17, the long-pressing time reaches the specified time and the lock state is entered. At the next time t18, the power switch 10 is pressed briefly, but the motor 6 is not started because it is in the locked state. At the next time t19, the unlocking operation (long-pressing operation of the power switch 10) is started, and at the next time t20, the long-pressing time reaches the prescribed time and the locked state is released. At the next time t21, the power switch 10 is turned on and the motor 6 is activated. In this way, if the locked state can be released by long-pressing the power switch 10, the user can smoothly perform a series of operations from unlocking to turning on the power without moving the finger from the power switch 10. . Note that the motor 6 may be set to start simultaneously with the completion of the unlocking operation at time t20.

(Embodiment 2) In Embodiment 2 shown in FIG. 11, the motor 6 is not started only by the user turning on the power switch 10, and the motor 6 is started only when the shift switch 13 is pressed after that. It is different from the first embodiment in that As shown in the timing chart of the figure, when the power switch 10 is turned on (time t31), the power is switched from off to on without starting the motor 6 . The fact that the power has been switched to the ON state can be notified to the user, for example, by turning on the display section 16 . In this embodiment, the power-on state means a standby state in which the motor 6 can be activated by pressing the shift switch 13, and the power-off state means that the motor 6 can be activated even if the shift switch 13 is pressed. It is a hibernation state in which it is impossible to wake up.

At the next time t32, the depressing operation of the speed change switch 13 is started, and the motor 6 is started with the reference rotation speed R0 as the target rotation speed R. From time t32 to time t33 when the pressing force P becomes zero, the target rotation speed R corresponding to the magnitude of the pressing force P is set between the reference rotation speed R0 and the maximum rotation speed R1. At the next time t34, the power switch 10 is turned off and the power is switched to the off state. The switching of the power supply to the off state can be notified to the user by, for example, extinguishing the display unit 16 . At time t35, the shift switch 13 is pressed, but the motor 6 is not activated because the power is off. Others are the same as those of the first embodiment, so description thereof will be omitted. The same applies to the following examples.

Note that the power switch 10 according to the present embodiment can be configured by a capacitive touch sensor that detects contact with a human body. If the power switch 10 made up of a touch sensor is provided on the surface of the body case 1, especially on the grip part 1a, the user will be conscious of the power switch 10 because the power will be switched to the ON state just by gripping the body case 1 by the user. No need to operate manually. When the user presses the shift switch 13 while gripping the main body case 1 (touching the power switch 10), the motor 6 is activated.

(Embodiment 3) Embodiment 3 shown in FIGS. 12 and 13 differs from Embodiment 1 in that it includes an initialization switch 30 for returning the target rotation speed R of the motor 6 to the reference rotation speed R0. The initialization switch 30 is composed of an initialization operation portion 31 provided on the front wall of the main body case 1 and a switch element 32 located on the inner surface side of the initialization operation portion 31. are placed. The switch element 32 is connected to the control board 8 by a lead wire (not shown), and the user can press the switch element 32 via the initialization operation section 31 .

In the first embodiment described above, when the pressing force P detected by the shift switch 13 decreases, the motor 6 is also controlled to decelerate. The rotational speed before the pressing force P is reduced is maintained. In other words, even after the user removes his finger from the shift switch 13, the motor 6 is maintained at the number of revolutions immediately before the finger starts to be removed. By pressing the initialization switch 30, the user can return the rotation speed of the motor 6 to the original reference rotation speed R0.

At the first time t41 in the timing chart of FIG. 13, the power switch 10 is turned on and the target rotation speed R is set to the reference rotation speed R0. At the next time t42, the pressing force P detected by the speed change switch 13 begins to increase, and thereafter, as the pressing force P increases, the target rotational speed R also rises. Up to this point, the process is the same as in the first embodiment, but from time t43 when the pressure P reaches its peak to time t44, even if the pressure P decreases to zero, the target rotation speed R is It is maintained at the value at time t43 without lowering. After time t44, the pressing force P increases again, and after time t45 when the pressing force P reaches the same level as at time t43, the target rotational speed R increases as the pressing force P increases. After time t46 when the pressing force P reaches its peak, the target rotational speed R does not decrease even if the pressing force P decreases, and is maintained at the value at time t46. At the next time t47, the initialization switch 30 is pressed and the target rotation speed R has returned to the reference rotation speed R0.

A modification of this embodiment is shown in the timing chart of FIG. In this modified example, the shift switch 13 also serves as the initialization switch 30 . That is, if the target rotation speed R of the motor 6 is not the reference rotation speed R0 at the time when the shift switch 13 is pressed, the target rotation speed R is returned to the reference rotation speed R0 (time t44). From time t44 to time t46, as the pressing force P detected by the shift switch 13 increases, the target rotational speed R increases again. At the next time t47, the speed change switch 13 is quickly clicked, and the target rotation speed R returns to the reference rotation speed R0.

(Embodiment 4) Embodiment 4 shown in FIG. 15 differs from Embodiment 3 in that the rotation speed of the motor 6 is controlled based on the length of time the shift switch 13 is pressed. At the first time point t51 in the timing chart of FIG. 4, the power switch 10 is turned on and the target rotation speed R is set to the reference rotation speed R0. From time t52 to time t53, the user presses the shift switch 13, and the switch 13 detects the pressing force P. During this period, the target rotation speed R gradually increases. The increase pace of the target rotational speed R is constant regardless of the magnitude of the pressing force P. Even if the pressing force P becomes zero after time t53, the target rotational speed R is maintained at the value at time t53 without decreasing. From time t54 to time t55, the shift switch 13 detects the pressing force P again, and during this time the target rotational speed R further increases at the same pace as before. The target rotation speed R is maintained even after time t55 when the pressing force P becomes zero, but at the next time t56, the initialization switch 30 is pressed and the target rotation speed R returns to the reference rotation speed R0. there is

A modification of this embodiment is shown in the timing chart of FIG. In this modified example, the shift switch 13 also serves as the initialization switch 30 . That is, if the target rotation speed R of the motor 6 is not the reference rotation speed R0 at the time when the shift switch 13 is pressed, the target rotation speed R is returned to the reference rotation speed R0 (time t54). From time t54 to t55, the target engine speed R increases again at a constant pace. At the next time t56, the speed change switch 13 is quickly clicked, and the target rotation speed R returns to the reference rotation speed R0.

(Embodiment 5) Embodiment 5 shown in FIG. 17 is different from Embodiment 1 in that a shift switch 13 is arranged in a grip portion 1a formed of an inwardly recessed constricted portion. The shift switches 13 are arranged on the left and right sides of the grip portion 1a, respectively, and the pressure sensors 15 are arranged inside the shift operating portions 14, respectively. According to this embodiment, the user can change the speed of the motor 6 by adjusting the strength of gripping the grip portion 1a (shift switch 13) without moving the fingertips. improves usability.

(Embodiment 6) Embodiment 6 shown in FIG. 18 is similar to that of Embodiment 5 in that the shift switch 13 is arranged across the grip portion 1a and the outer convex portion 1b continuous to the lower side of the grip portion 1a. different from According to this embodiment, it is possible to obtain the same effects as those of the fifth embodiment, and in addition, even if the user shaves while gripping the bulging portion 1b, it is troublesome to move the fingertips. It is possible to change the speed of the motor 6 without changing the speed, and it is possible to meet more diverse needs.

(Embodiment 7) Embodiment 7 shown in FIG. 19 is different from Embodiment 1 in that the pressure sensor 15 of the speed change switch 13 is composed of a variable resistance type displacement sensor. The pressure sensor 15 here is composed of a detecting portion 33 fixed to the inner surface of the main body case 1 and a detected portion 34 fixed to the inner end portion of the shift operating portion 14 . The gear shift operation portion 14 is biased by a spring 35 to protrude outward (forward) from the main body case 1 , and when the user pushes the gear shift operation portion 14 inward of the main body case 1 , the detection portion 33 is pushed. The relative position of the detector 34 changes. The detecting portion 33 can steplessly detect the relative position of the detected portion 34 based on the output voltage at the resistance value corresponding to the relative position of the portion to be detected 34. The pressing force P to be applied can be detected steplessly. The control unit 20 can steplessly control the rotation speed of the motor 6 according to the magnitude of the pressing force P detected by the detection unit 33 , that is, the pressure sensor 15 . The displacement sensor that can be used as the pressure sensor 15 is not limited to the variable resistance type, and various types such as an optical type and a capacitance type may be used. The same applies to Example 12, which will be described later.

(Embodiment 8) Embodiment 8 shown in FIG. 20 is different from Embodiment 7 in that the pressure sensor 15 of the speed change switch 13 is composed of a proximity switch. The pressure sensor 15 here includes a plurality of (three in this embodiment) detecting portions 37 fixed to the inner surface of the main body case 1, and one detected portion fixed to the inner end portion of the shift operating portion 14. 38. The detected part 38 is, for example, a permanent magnet, and the detecting part 37 is a reed switch that reacts to magnetic force. In a normal state in which no pressing force P is applied to the surface of the shift operation portion 14, the shift operation portion 14 receives an outward biasing force from the spring 35 and is positioned at the projecting end that protrudes most from the main body case 1. Three detection portions 37 are arranged along the displacement direction of the shift operating portion 14 inside the detected portion 38 at the time.

When the user pushes the shift operating portion 14 inward of the main body case 1 , the detectable portion 38 moves inward together with the shift operating portion 14 and is detected by one of the detecting portions 37 . When the pressing force P applied to the surface of the speed change operation portion 14 is equivalent to "weak", the detecting portion 37 on the front side near the surface of the main body case 1 detects the detected portion 38, and the pressing force P is "medium". , the central detecting portion 37 detects the detected portion 38 , and when the pressing force P corresponds to "strong," the far side detecting portion 37 detects the detected portion 38 . In other words, the pressure sensor 15 here can detect the magnitude of the pressing force P applied to the surface of the shift operating portion 14 in three stages, and the control portion 20 also controls the rotation speed of the motor 6 in three stages. can do.

(Embodiment 9) A ninth embodiment shown in FIGS. 21 and 22 differs from the first embodiment in that a predetermined lower limit pressure P0 is set with respect to the pressure P detected by the shift switch 13 (lower limit pressure). pressure P0<upper limit pressure P1). In the first embodiment, the target rotation speed R of the motor 6 is increased from the reference rotation speed R0 when the shift switch 13 detects even a slight pressing force P. However, in the present embodiment, as shown in FIG. If P is equal to or less than the lower limit pressing force P0, the target rotation speed R is maintained at the reference rotation speed R0 without being accelerated. When the pressing force P exceeds the lower limit pressing force P0, the target rotational speed R is increased as the pressing force P increases. As in the first embodiment, the target rotation speed R is uniformly set to the maximum rotation speed R1 when the pressing force P becomes equal to or greater than the upper limit pressing force P1. The lower limit pressing force P0 according to the present embodiment functions as a so-called play, and prevents unintentional shift control from being performed when, for example, the user unconsciously touches the shift operation unit 14 lightly.

At the first time point t61 in the timing chart of FIG. 22, the power switch 10 is turned on and the target rotation speed R of the motor 6 is set to the reference rotation speed R0. The target rotation speed R is maintained at the reference rotation speed R0 from time t62 when the pressing force P detected by the shift switch 13 starts to rise to time t63 when the pressing force P reaches the lower limit pressing force P0. After t63 and the pressing force P exceeds the lower limit pressing force P0, the target rotational speed R starts to increase. From time t63 to the next time t64, the target rotation speed R is set between the reference rotation speed R0 and the maximum rotation speed R1 according to the magnitude of the pressing force P, and the pressing force P reaches the lower limit pressing force P0. After time t64 when the target rotation speed R has decreased to , the target rotation speed R is uniformly set to the reference rotation speed R0.

(Embodiment 10) Embodiment 10 shown in FIG. 23 is different from Embodiment 9 in that the number of revolutions of the motor 6 is controlled based on the length of time the shift switch 13 is pressed. The target rotation speed R is maintained at the reference rotation speed R0 from time t71 when the pressing force P detected by the speed change switch 13 starts increasing to time t72 when the pressing force P reaches the lower limit pressing force P0. After the pressing force P exceeds the lower limit pressing force P0 after the time point t72, the target rotation speed R starts to increase, and gradually increases at a constant pace regardless of the magnitude of the pressing force P until the next time point t73. ing. Even if the pressing force P becomes zero after time t73, the target rotational speed R is maintained at the value at time t73 without decreasing. At the next time t74, the shift switch 13 detects the pressing force P again, and the target rotation speed R is returned to the reference rotation speed R0. That is, in this embodiment, the speed change switch 13 also serves as the initialization switch 30, as in the modification of the fourth embodiment described above. From time t75 to t76 when the pressing force P reaches the lower limit pressing force P0 again, the target rotational speed R increases again at a constant pace.

The electric shavers according to the ninth and tenth embodiments can be implemented in the following modes (the position of the speed change switch 13 is not limited to the upper front portion of the electric shaver, but may be the lower front portion, the side surface, or the like).

Equipped with a cutting blade 3 including a movable blade 4, a power switch 10 for powering on, and a speed change switch 13 for operating the driving speed of the movable blade 4,
The shift switch 13 includes a shift operation portion 14 exposed on the surface and a pressure sensor 15 for detecting the pressing force P applied to the surface of the shift operation portion 14,
An electric shaver in which the speed change control of the movable blade 4 is started only when the pressure sensor 15 detects a pressing force P exceeding a predetermined lower limit pressing force P0.

When the pressure sensor 15 of the shift switch 13 detects the pressing force P exceeding the predetermined lower limit pressing force P0, the shift control of the movable blade 4 is started only when the user unconsciously touches the shift operation unit 14. It is possible to improve usability of the electric shaver by preventing unintentional shift control from being performed when the electric shaver is lightly touched.

An electric shaver in which a movable blade 4 is accelerated at a constant pace while a pressing force P detected by a pressure sensor 15 exceeds a lower limit pressing force P0.

If the movable blade 4 is accelerated at a constant pace while the pressing force P exceeds the lower limit pressing force P0, even a user with relatively weak grip strength can achieve the minimum pressing force exceeding the lower limit pressing force P0. The movable blade 4 can be easily accelerated simply by continuing to apply the pressing force P of .

An electric shaver in which a movable blade 4 is accelerated as a pressing force P detected by a pressure sensor 15 increases beyond a lower limit pressing force P0.

If the movable blade 4 is accelerated as the pressing force P increases beyond the lower limit pressing force P0, the user applies a relatively large pressing force P to the speed change operation unit 14 to move the movable blade 4 at once. It is possible to obtain an electric shaver which can be accelerated and which is convenient for users who especially prefer high-speed driving of the movable blade 4.例文帳に追加

An electric shaver in which the driving speed of the movable blade 4 is maintained at the driving speed before the decrease even after the pressing force P detected by the pressure sensor 15 is decreased.

If the drive speed of the movable blade 4 is maintained even after the pressing force P is reduced, the user can accelerate the movable blade 4 to a desired drive speed and then press the speed change operation unit 14 by hand or hand. Even if the finger is released, the movable blade 4 can be maintained in the accelerated state. It is possible to obtain an electric shaver that is easier for the user to use by eliminating the burden of continuously applying the pressing force P of the same magnitude in order to maintain the speed.

It has an initialization switch 30 paired with the speed change switch 13,
An electric shaver in which, when an initialization switch 30 is operated in a state in which the drive speed of a movable blade 4 is different from a predetermined reference speed, the drive speed is set to the reference speed.

By providing the initialization switch 30 for the driving speed of the movable blade 4, the user can return the movable blade 4 to the reference speed with a single touch, improving convenience.

The speed change switch 13 also serves as the initialization switch 30,
In this electric shaver, the drive speed is set to the reference speed when the shift switch 13 switches from the state of not detecting the pressing force P to the state of detecting it while the driving speed of the movable blade 4 is different from the reference speed.

If the speed change switch 13 also serves as the initialization switch 30, a dedicated part constituting the initialization switch 30 becomes unnecessary, and the cost can be reduced accordingly.

An electric shaver in which the movable blade 4 is accelerated as the pressing force P detected by the pressure sensor 15 increases, and the movable blade 4 is decelerated as the pressing force P decreases.

If the movable blade 4 is accelerated as the pressing force P increases and is decelerated as the pressing force P decreases, the user can simply increase or decrease the pressing force P applied to the speed change operation unit 14. , the movable blade 4 can be speed-changed timely and at will to adjust to a desired driving speed. In the case of slightly decelerating the movable blade 4 driven at a relatively high speed, in the previous embodiment using the initialization switch 30, the drive speed is once returned to the reference speed, and then the pressing force P is applied to the shift operation unit 14 again. However, in this embodiment, the purpose can be achieved immediately by reducing the pressing force P a little.

(Embodiment 11) Embodiment 11 shown in FIGS. 24 and 25 is different from Embodiment 1 in that the shift switch 13 is composed of an acceleration switch 13A and a deceleration switch 13B which are arranged symmetrically. The acceleration switch 13A on the right side is composed of an acceleration operation portion 14A and a switch element 39A, and the deceleration switch 13B on the left side is composed of a deceleration operation portion 14B and a switch element 39B. In this embodiment, the motor 6 is accelerated or decelerated according to the number of times the acceleration switch 13A or the deceleration switch 13B is pressed or the length of time the switch is pressed. As shown in the timing chart of FIG. 25, from time t81 to time t82, the motor 6 is accelerated or decelerated each time the acceleration switch 13A or deceleration switch 13B is pressed (clicked). From the next time t83 to time t84, the motor 6 is accelerated or decelerated for the length of time the acceleration switch 13A or the deceleration switch 13B is pressed for a long time.

(Twelfth Embodiment) A twelfth embodiment shown in FIG. 26 is different from the first embodiment in that the shift switch 13 has a variable resistance displacement sensor 40 instead of the pressure sensor 15 . In the seventh embodiment, which also uses a displacement sensor, the front-rear movement of the detected part 34 is detected by the detection part 33, but in the present embodiment, the left-right movement of the detected part 42 is detected by the detection part 41. detect. The shift operation unit 14 is composed of a slide lever that can move in the left-right direction, and the detected portion 42 is fixed to the inner surface of the slide lever. changes. The detection unit 41 can steplessly detect the relative position of the detected portion 42 based on the output voltage at the resistance value corresponding to the relative position of the detected portion 42, and the control unit 20 rotates the motor 6 accordingly. The number can be controlled steplessly. The user can accelerate the motor 6 by moving the shift operation unit 14 to the right, and decelerate the motor 6 by moving the operation unit 14 to the left. Of course, the relationship between the sliding direction of the shift operation unit 14 and the rotation speed of the motor 6 may be reversed.

(Thirteenth Embodiment) A thirteenth embodiment shown in FIG. 27 is different from the first embodiment in that the shift switch 13 is constituted by a capacitive touch sensor 13C. The touch sensor 13C is formed to be horizontally elongated in the left and right direction, and can distinguish and recognize that the right half and the left half are tapped. When the user taps the right half of the touch sensor 13C, the motor 6 can be accelerated by the number of taps, and when the left half of the touch sensor 13C is tapped, the motor 6 can be decelerated by the number of taps. . Of course, the relationship between the tap position of the touch sensor 13C and the rotation speed of the motor 6 may be reversed. The touch sensor 13C may be capable of recognizing the flick or swipe direction in addition to the tap position. In this case, the motor 6 can be accelerated or decelerated based on the direction.

Further, in this embodiment, the razor head 2 is immovably fixed to the body case 1, unlike the above embodiments. The power operating unit 11 is composed of a vertically movable slide lever, and the switch element 12 is switched between an upper ON position and a lower OFF position by sliding the slide lever. The display unit 16 consists of a pair of left and right 7-segment display units, and displays the number of rotations of the motor 6 (for example, a relative value with the maximum number of rotations R1 as 100) and the remaining amount (%) of the secondary battery 7 with two-digit numbers. do.

(Embodiment 14) Embodiment 14 shown in FIG. is different from Example 1 of When the user rotates the jog dial 13D clockwise, the motor 6 can be accelerated by the rotation angle, and when the jog dial 13D is rotated counterclockwise, the motor 6 can be decelerated by the rotation angle. be able to. Of course, the relationship between the rotation direction of the jog dial 13D and the rotation speed of the motor 6 may be reversed.

(Embodiment 15) Embodiment 15 shown in FIGS. 29 and 30 is different from Embodiment 1 in that a cooling body 47 and a light emitting part 48 are arranged in the razor head 2 . The cooling body 47 consists of a plate body arranged on both left and right sides of the cutting blade 3 on the upper surface of the razor head 2, and a Peltier element 49 for cooling the cooling body 47 is built in the inner side thereof. A user who has finished shaving can cool and care for the skin surface after shaving by energizing the Peltier device 49 and pressing the cooling body 47 against it as needed.

The light emitting section 48 is composed of a light source substrate 50 that is horizontally accommodated below the inner blade 4 and a plurality of light sources 51 that are mounted on the upper surface of the light source substrate 50 . Each light source 51 is composed of a multicolor light-emitting LED, and excites the photocatalyst coated on the inner blade 4 and the outer blade 5 to promote the decomposition of organic matter, thereby suppressing the generation of offensive odors associated with decomposition of the organic matter. The light emitting part 48 also functions as illumination for illuminating the cutting blade 3 and the user's skin surface, and the brightness (the number of light sources 51 that light up) can be adjusted in three stages.

As in the fourteenth embodiment, the power switch 10 is arranged on the upper part of the main body case 1, and the cooling switch 53 is arranged on the left side thereof. The user can switch the energized state of the Peltier element 49 by pressing the switch element 55 via the cooling operation portion 54 of the cooling switch 53 . A dimming switch 56 is arranged on the right side of the power switch 10 . Each time the user presses the switch element 58 via the dimming operation portion 57 of the dimming switch 56, the light emitting portion 48 is switched from the extinguished state to the strong luminous state, the medium luminous state, and the weak luminous state in this order, and then extinguished again. return to state. An acceleration switch 13A is arranged on the upper side of the power switch 10, and a deceleration switch 13B is arranged on the lower side thereof. The explanation is omitted.

29, the areas (projected areas in front view) of the operation units 14A, 14B, 54, and 57 around the power supply operation unit 11 are set larger than the area of the power supply operation unit 11 (same). ing. Here, the large area of each of the operation portions 14A, 14B, 54, and 57 does not mean the total area of the four operation portions 14A, 14B, 54, and 57, but rather the total area of the operation portions 14A, 14B, 54, and It means that the area of each single unit of 57 is larger than the area of the power supply operation unit 11 . 30, the operating portions 14A, 14B, 54, and 57 around the power operating portion 11 protrude from the surface of the main body case 1 more than the power operating portion 11. As shown in FIG. In general, the user presses the power supply operation unit 11 only twice, at the start and end of use of the electric shaver. Since there is a strong tendency to be operated with the above frequency, by setting these areas and projecting dimensions large, it is possible to facilitate the operation of both the operation sections 14A and 14B, thereby improving the user's convenience. Also, if the area and projecting dimension of the power operation unit 11 are set small, the user may accidentally touch the power operation unit 11 when operating the operation units 14A, 14B, 54, and 57 around the power operation unit 11. You can prevent power outages.

The light-emitting portion 48 arranged on the razor head 2 can exhibit the function of notifying the user of the remaining amount of the secondary battery 7 based on the color of light emitted. The light emitting section 48 is easily visible to the user holding the body case 1, and unlike the display section 16 on the body side, the light emitting section 48 is not hidden by the hand holding the body case 1, so that various information can be displayed to the user. can be reliably notified to

(Embodiment 16) Embodiment 16 shown in Figs. 31 to 35 is different from Embodiment 1 in that a motor 6 with a speed reducer is arranged in the razor head 2 and the like. The motor 6 is arranged horizontally with its output shaft 61 located on the right end side, and the output shaft 61 is parallel to the central axis 62 of the inner cutter 4 . A timing belt 63 is wound between the output shaft 61 and the central shaft 62 via a pulley, and the rotational power of the motor 6 is transmitted to the inner blade 4 via the belt 63 .

An acceleration switch 13A and a deceleration switch 13B are arranged above and below the power switch 10 as in the fifteenth embodiment. However, the acceleration operation section 14A and the deceleration operation section 14B are extended left and right along the peripheral edge of the power source operation section 11 by the amount corresponding to the absence of the cooling switch 53 and the light control switch 56 . The area of each of the acceleration operation section 14A and the deceleration operation section 14B (projected area in front view) is set larger than the area of the power operation section 11 (same). 11 protrudes from the surface of the body case 1 (see FIG. 32).

The display section 16 below each switch 10, 13A, 13B consists of a pair of left and right 7-segment display sections as in the thirteenth embodiment, and displays the number of rotations of the motor 6 and the remaining charge of the secondary battery (battery) 7. is displayed as a number, etc. As shown in FIG. 33, the rotation speed of the motor 6 is displayed as a relative value with 10000 rpm (reference rotation speed R0 in this embodiment) being "0", and the relative value is only 1 each time the rotation speed increases or decreases by 300 rpm. Increase or decrease. The maximum relative value is "5", and the rotation speed of the motor 6 at this time is 11500 rpm (maximum rotation speed R1). The minimum value of the relative value is "-5", and the rotation speed of the motor 6 at this time is 8500 rpm (minimum rotation speed). The remaining charge (%) of the secondary battery 7 is displayed in two-digit numbers in increments of 10%. However, when the remaining charge is 100% (FULL), "FU" is displayed, and when the remaining charge is 0%, "00" is displayed.

At the first time point t91 in the timing chart of FIG. 34, the power switch 10 is turned off and the motor 6 is stopped, and at the next time point t92, the power switch 10 is turned on and the motor 6 is started. In this embodiment, the target rotation speed R immediately before the motor 6 stops is stored (overwritten) in a storage unit (not shown) of the control unit 20, and when the motor 6 starts next time is set to the value stored in the storage unit. Therefore, the target rotational speed R of the motor 6 at time t92 is set to "1" (10300 rpm), which is the same as at time t91. After time t92, the motor 6 is accelerated or decelerated by a relative value of 1, ie, 300 rpm each time the acceleration switch 13A or the deceleration switch 13B is pressed (clicked).

The display unit 16 displays the relative value of the target rotational speed R of the motor 6 when the power switch 10 is turned on and when the acceleration switch 13A or deceleration switch 13B is pressed. A predetermined rotation speed display time T4 (for example, 2 seconds) is set for this display of the rotation speed. The display shifts to the display of the remaining charge of the secondary battery 7 (see time t93). When the acceleration switch 13A or the deceleration switch 13B is pressed while the display unit 16 is displaying the remaining charge, the display unit 16 again shifts to the rotation speed display (see time t94). If the power switch 10 is turned off during the rotation speed display even before the rotation speed display time T4 has elapsed, the display unit 16 shifts from the rotation speed display to the remaining charge display (see time t95). ). A predetermined remaining charge display time T5 (for example, 4 seconds) is also set for this remaining charge display, and when the same time T5 elapses after the power switch 10 is turned off, the display unit 16 is turned off (see time t96).

It should be noted that the remaining amount display time T5 is applied only when the power switch 10 is turned off and the display of the number of revolutions changes to the display of the remaining amount of charge, that is, while the motor 6 is stopped, and the number of revolutions display time T4 is applied. When the display of the remaining charge level has elapsed, that is, while the motor 6 is being driven, the display of the remaining charge level continues even after the remaining charge display time T5 has elapsed (t98-t97>T5 in the timing chart of FIG. 35). ). Further, as shown at time t99 in the same chart, when the power switch 10 is turned off while the display unit 16 is displaying the remaining charge, the display unit 16 temporarily turns off and then displays the remaining charge. to light up again. When the remaining amount display time T5 elapses from this relighting, the display section 16 is completely extinguished (see time t100).

FIG. 36 shows a first modification of this embodiment. In this modification, the display section 16 is composed of a level display section 65 on the upper side and a type display section 66 on the lower side. The level display section 65 is composed of 11 LEDs aligned vertically, and scales are displayed on both ends of the row of LEDs and on the left and right of the center. The scale on the left indicates the relative value of the rotation speed of the motor 6 is "5" (11,500 rpm), "0" (10,000 rpm), and "-5" (8,500 rpm) from the top. , indicate that the remaining charge of the secondary battery 7 is 100%, 50%, and 0% in order from the top. The type display section 66 is composed of an upper rpm lamp and a lower remaining charge lamp. The display control means 24 for controlling the display unit 16 turns on one of the LEDs constituting the level display unit 65 and one of the lamps constituting the type display unit 66, and the motor at that time is turned on. The number of rotations of 6 or the remaining charge of secondary battery 7 is notified to the user. The display section 16 on the left side illustrated in FIG. It shows that the amount is 40%.

A second modification of this embodiment is shown in FIG. In this modification, the upper acceleration switch 13A of the power switch 10 is made larger than the lower deceleration switch 13B. More specifically, the area of the acceleration operation portion 14A (projected area in front view) is set larger than the area of the deceleration operation portion 14B (same). However, the area of the deceleration operating section 14B is sufficiently larger than the area of the power source operating section 11, as in the sixteenth embodiment. If the acceleration switch 13A is set larger than the deceleration switch 13B as in this modification, the acceleration switch 13A is a switch for accelerating the motor 6 and the deceleration switch 13B is a switch for decelerating the motor 6. The user can intuitively recognize that.

The electric shavers according to the fifteenth and sixteenth embodiments can be implemented in the following modes (the positions of the acceleration switch 13A and the deceleration switch 13B are not limited to the upper front portion of the electric shaver, but may be the lower front portion, the side surface, or the like). can also be used).

A cutting blade 3 including a movable blade 4, a motor 6 for driving the movable blade 4, a power switch 10 for powering on, an acceleration switch 13A for accelerating the motor 6, and a deceleration switch for decelerating the motor 6. 13B and
An electric shaver in which an acceleration switch 13A and a deceleration switch 13B are arranged symmetrically with a power switch 10 interposed therebetween.

According to the electric shaver in which the acceleration switch 13A and the deceleration switch 13B are arranged symmetrically with the power switch 10 interposed therebetween, the switches 10, 13A and 13B can be gathered in one place to improve usability.

An electric shaver in which an acceleration switch 13A is arranged above a power switch 10 and a deceleration switch 13B is arranged below the power switch 10. - 特許庁

When the acceleration switch 13A is arranged above the power switch 10 and the deceleration switch 13B is arranged below the power switch 10, the user intuitively understands the functions of the acceleration switch 13A and the deceleration switch 13B, and the motor 6 is intended. You can shift gears as is.

When viewed from the front facing the power operation portion 11 of the power switch 10, the acceleration operation portion 14A of the acceleration switch 13A, and the deceleration operation portion 14B of the deceleration switch 13B, the areas of the acceleration operation portion 14A and the deceleration operation portion 14B are An electric shaver set larger than the area of the part 11.

The area of the acceleration operation portion 14A of the acceleration switch 13A and the area of the deceleration operation portion 14B of the deceleration switch 13B can be set larger than the area of the power operation portion 11 of the power switch 10 in the front view. In general, the user operates the power switch 10 only twice, at the start and end of use of the electric shaver. Therefore, by setting the areas of the acceleration operation section 14A and the deceleration operation section 14B to be large, both operation sections 14A and 14B can be easily operated, thereby improving the user's convenience. In addition, by setting the area of the power operation unit 11 small, it is possible to prevent the user from accidentally touching the power operation unit 11 and turning off the power when operating the acceleration operation unit 14A or the deceleration operation unit 14B.

An electric shaver in which an acceleration operation portion 14A of an acceleration switch 13A and a deceleration operation portion 14B of a deceleration switch 13B protrude from the surface of a body case 1 more than a power supply operation portion 11 of a power switch 10.

The acceleration operation portion 14A of the acceleration switch 13A and the deceleration operation portion 14B of the deceleration switch 13B can protrude from the surface of the main body case 1 more than the power operation portion 11 of the power switch 10 does. As described above, the acceleration switch 13A and the deceleration switch 13B tend to be operated more frequently than the power switch 10. 14B can be easily operated to improve the user's convenience. In addition, by setting the projecting dimension of the power operation unit 11 to be small, it is possible to prevent the user from accidentally touching the power operation unit 11 and turning off the power when operating the acceleration operation unit 14A or the deceleration operation unit 14B. .

It comprises a battery 7 that supplies driving power to the motor 6, and a display unit 16 that selectively displays the number of rotations of the motor 6 and the remaining amount of the battery 7,
When the power switch 10 is turned on, the motor 6 starts at a predetermined number of revolutions and the number of revolutions is displayed on the display unit 16.
An electric shaver in which a display unit 16 shifts to display of a remaining amount of a battery 7 when a predetermined rotation speed display time T4 has elapsed after the rotation speed is displayed.

When the power switch 10 is turned on, the motor 6 starts at a predetermined number of revolutions, and the number of revolutions is displayed on the display unit 16. According to the electric shaver, the user can accurately determine the number of revolutions when the motor 6 starts. can be easily known. A user who knows the rotation speed can easily and reliably adjust the motor 6 to a desired rotation speed by operating the acceleration switch 13A or the deceleration switch 13B as necessary. Further, if the display unit 16 is arranged to shift to display the remaining amount of the battery 7 after the predetermined number of rotation display time T4 has elapsed, the user can know the remaining amount of the battery 7 without performing any special operation. becomes possible and convenience is improved.

In this electric shaver, when an acceleration switch 13A or a deceleration switch 13B is operated while the display unit 16 displays the remaining amount of the battery 7, the speed of the motor 6 is changed and the display unit 16 shifts to display the rotation speed of the motor 6.

When the acceleration switch 13A or the deceleration switch 13B is operated while the display unit 16 is displaying the remaining amount of the battery 7, the speed of the motor 6 is changed and the display unit 16 shifts to display the rotation speed of the motor 6. Therefore, the user can easily know the correct rotational speed of the motor 6 after shifting. That is, the user can determine whether further acceleration or deceleration is necessary based on the number of rotations displayed on the display unit 16, and can reliably adjust the number of rotations of the motor 6 to the desired number.

An electric shaver in which when a power switch 10 is turned off while the display unit 16 displays the number of rotations of a motor 6, the display unit 16 shifts to display of the remaining amount of the battery 7. - 特許庁

When the power switch 10 is turned off while the display unit 16 is displaying the number of rotations of the motor 6, the display unit 16 shifts to display the remaining amount of the battery 7. The remaining amount of 7 can be surely notified to the user. The user who knows the remaining amount of the battery 7 can take measures such as charging the battery 7 before the next use, if necessary.

An electric shaver in which the display part 16 is turned off when a predetermined remaining amount display time T5 elapses after the display part 16 shifts to display of the remaining amount of the battery 7. - 特許庁

Power consumption can be reduced by turning off the display unit 16 after a predetermined remaining amount display time T5 has elapsed since the display unit 16 shifted to display the remaining amount of the battery 7 .

When the power switch 10 is turned off while the display unit 16 is displaying the remaining amount of the battery 7, the display unit 16 is temporarily turned off and then the remaining amount of the battery 7 is displayed again.

When the power switch 10 is turned off while the display unit 16 is displaying the remaining amount of the battery 7, the display unit 16 temporarily turns off and then displays the remaining amount of the battery 7 again. . By displaying the remaining amount of the battery 7 even after the use of the electric shaver is finished, the remaining amount can be surely notified to the user. The user who knows the remaining amount of the battery 7 can take measures such as charging the battery 7 before the next use, if necessary.

An electric shaver in which the display unit 16 is turned off when a predetermined remaining amount display time T5 elapses after the display unit 16 displays the remaining amount of the battery 7 again.

Power consumption can be reduced by turning off the display unit 16 after a predetermined remaining amount display time T5 has elapsed since the display unit 16 displayed the remaining amount of the battery 7 again.

Although the shift switch 13 is arranged on the body case 1 in each of the above embodiments, the same switch 13 can also be arranged on the razor head 2 . The motor 6 includes a reciprocating linear motor in addition to the rotary motor according to each of the above embodiments. In addition to the rotary electric shaver according to each of the above embodiments, the present invention provides an electric shaver equipped with a reciprocating cutting blade, an electric shaver equipped with a cutting blade consisting only of an inner blade (movable blade), or a main body It can also be applied to an electric shaver (an electric shaver without a shaver head 2) in which a cutting blade 3 is provided on the top of the case 1, or the like. Further, the electric shaver of the present invention includes an electric clipper that cuts hair mainly with a comb-shaped fixed blade and a comb-shaped movable blade, in addition to a shaver that mainly cuts hair with an outer blade and an inner blade. included. The position of the speed change switch 13 (the acceleration switch 13A and the deceleration switch 13B) is not limited to the upper front surface of the electric shaver, but may be the lower front surface or the side surface.

REFERENCE SIGNS LIST 1 body case 1a grip portion 1b bulging portion 2 razor head 3 cutting blade 4 movable blade (inner blade)
5 Outer blade 6 Motor 10 Power switch 11 Power operation unit 12 Switch element 13 Shift switch 13A Acceleration switch 13B Deceleration switch 14 Shift operation unit 14A Acceleration operation unit 14B Deceleration operation unit 15 Pressure sensor 16 Display unit 17 Light source (LED)
18 Translucent window P Pressing force R0 Reference number of rotations R1 Maximum number of rotations

Claims (3)

A cutting blade (3) including a movable blade (4), a motor (6) for driving the movable blade (4), a battery (7) for supplying driving power to the motor (6), and a power switch for turning on the power. (10), and a display section (16) that selectively displays the number of rotations of the motor (6) and the remaining amount of the battery (7),
When the power switch (10) is turned on, the motor (6) starts at a predetermined number of revolutions and the number of revolutions is displayed on the display section (16).
An electric shaver characterized in that when a predetermined number of revolutions display time (T4) elapses after the number of revolutions is displayed, a display section (16) shifts to display of a remaining amount of a battery (7). Equipped with an acceleration switch (13A) for accelerating the motor (6) and a deceleration switch (13B) for decelerating the motor (6),
When the acceleration switch (13A) or deceleration switch (13B) is operated while the display (16) is displaying the remaining amount of the battery (7), the speed of the motor (6) is changed and the display (16) 2. Electric shaver according to claim 1, characterized in that it transitions to the number of revolutions of the motor (6). When the power switch (10) is turned off while the display unit (16) is displaying the number of rotations of the motor (6), the display unit (16) shifts to display the remaining amount of the battery (7). 3. The electric shaver according to claim 1 or 2.

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