JPH02144093A - Electric shaver - Google Patents

Abstract

PURPOSE:To estimate the using time of a new shaving cutter and display it by a proper method, when the using of the shaving cutter is started, and enable the exchang ing time of the shaving cutter to be quantitatively confirmed by arranging a means for measuring the driving time of a motor, a means for estimating and storing the measured time, and a means for displaying a stored content. CONSTITUTION:Voltage in proportion to the drop voltage of a resistor R1 due to load current is set to be applied to an electricity quantity estimation recorder 15, and when the load current flowing to the resistor R1 is changed, then the drop voltage of the resistor R1 is changed, and the applied voltage of the electricity quantity estima tion recorder 15 is also changed. For example, when the load current is greatly used on shaving off heavy whiskers or on pushing a face strongly against a shaver, then the drop voltage of the resistor R1 is increased, and so the applied voltage to the electricity quantity estimation recorder 15 is also increased, and the moving quantity of electrolyte 11 for showing an estimation time is increased. In other words, when the load current is increased and a shaving cutter is quickly consumed, then an estima tion quantity according to it is increased, and the exchanging time of the external shaving cutter 8 of the shaver can be specified more properly.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an electric razor, and in particular, an electric razor that counts and integrates the usage time of a motor and indicates when to replace the inner and outer blades of the razor. Regarding razors.

[Conventional technology]

Electric razors usually have a useful life of 5 to 6 years, but the blades of electric razors have a life of 1.5 to 3 years, although this varies depending on the type. The lifespan of this blade is based on the assumption that if you shave one mustache every day under average usage conditions, the blade will wear out and the sharpness will decrease or the outer blade will break if you continue to use it. It's time to become

As mentioned above, the lifespan of the blade is shorter than that of an electric razor, so conventional product instruction manuals have recommended that razor blades be replaced periodically after a certain period of use.

[Problem to be solved by the invention]

However, the usage time for each shave differs depending on the user, so some users may use the blade to the end of its life in one year, while others may use the blade to the end of its life in 3 years. Sometimes I don't. Therefore, the lifespan of the blade can be reduced to, for example,
In many cases, it cannot be said uniformly, such as 1.5 years for outer blades and 3 years for inner blades.

Further, the sharpness of the blade gradually deteriorates, so if the blade is used for a long period of time, the user may not notice the decrease in sharpness, and the beard is often shaved in a state where the blade has become extremely sharp. In other words, in the past, even if the blade was replaced periodically, the user did not know when to replace it, and the outer blade had to be replaced only when it was damaged, making it very difficult for the user to use. .

The present invention has been made in view of the above problems, and when a new blade is started to be used, the usage time of that blade is accumulated and displayed in an appropriate manner, and the blade replacement period is regularly determined. The purpose is to provide an electric razor that can be checked.

[Means to solve the problem]

In order to solve the above problems, the present invention provides an electric razor with a means for measuring the driving time of a motor, and a means for measuring the driving time of a motor, and
The device includes means for integrating and storing Δ11 hours, and means for displaying the stored contents.

[Effect]

In the electric razor configured as described above, the driving time of the motor is measured and integrated, and the total driving time is displayed on the display circuit.

〔Example〕

FIG. 1 shows a circuit diagram of an embodiment of an electric razor according to the present invention. Further, FIG. 2 shows an external view of the electric razor according to the present invention. In FIG. 1, a main battery B1, a main switch SWI, and a motor 3 form a driving section of the electric razor. It is charged by the charging device 2. Battery B2 is connected to the timer device 4, L below.
As a power source for the CD driver and the LCD display circuit 6, a lithium battery, mercury battery, or the like with low self-discharge is used to retain memory contents. The timer device 4 counts the time while the switch SW2 is on, and integrates and stores the measured time in a built-in memory. Further, when the main switch SWI is on, the accumulated time data is outputted to the LCD display circuit 6 via the LCD driver and displayed on the LCD display circuit 6.

The LCD driver 5 is a circuit that drives the LCD display circuit 6. Further, the LCD display circuit 6 is disposed on, for example, the body 7 of the electric razor so that it can be easily viewed by the user. The switch SW2 performs on/off operations in conjunction with the main switch SWI, and the on signal serves as a count operation signal for the timer device.

The switch SW3 is a reset switch, and is used to clear the contents of the memory, for example, when replacing the outer blade 8. In FIG. 2, the reset switch SW3 is a manual switch 174, but the timer device 4 may be reset automatically when the outer cutter 8 is replaced.

In the above configuration, when the main switch SWI is turned on, the motor 3 is driven, and at the same time, the switch SW2 is turned on, and the timer device 4 starts the total time 71111 and integrates the total Δp[time. Further, the cumulative time is displayed on the LCD display circuit 6 while the motor 3 is driving. When the main switch SWI is turned off, the motor 3 stops driving, and at the same time, the switch SW2 is turned off, and the timer device 4 is turned off.
stops the total time 4-1 and stores the accumulated time in the memory. Alternatively, as another operation mode of the timer device 4, the built-in memory alternately repeats reading and writing of the memory contents, and the read contents and the count time are added and sent to the LCD display circuit 6. The added value immediately before the switch SW2 is turned off may be written into the memory and stored as the cumulative time.

Next, a second embodiment using an integration recorder using an electrochemical reaction will be described. Figure 3 shows an electrical quantity integrating recorder that utilizes electrochemical reactions. The figure shows 10 parts of mercury and 1 part of electrolyte.
1 is sealed in a glass tube 12, and electrode terminals 13 and 14 are attached to both ends of the glass tube 12. When a DC voltage is applied between electrode terminals 13 and 14, electrolyte 1
1 through electrode terminal 13 (+ side)] 4 (-
Mercury 10 is electrolytically deposited on the electrode terminal 13 (+ side), and electrolyte 11 moves from the electrode terminal 14 (- side) to the electrode terminal 13 (+ side).

Since the amount of movement of the mercury 10 is proportional to the amount of energized electricity, by passing a constant current, the energization time can be determined as the distance that the mercury 10 moves. That is, initially, when the amount of electricity supplied is zero, the electrolytic solution 11 is on the electrode terminal 14 side.

After that, when electricity is applied for a certain period of time, the electrolytic solution 11 is transferred to the electrode terminal 1.
4 to the electrode terminal 13 and then stop, and the energization time can be determined by the distance from the electrode terminal 14 to the stop position of the electrolytic solution 11. Thereafter, when the current is applied for a certain period of time again, the electrolytic solution 11 moves by a predetermined amount from the previous stopping position and stops, and the total energizing time can be determined from the distance from the electrode terminal 14 to the current stopping position. In addition, if you want to reset the cumulative time when replacing the outer blade 8, apply a voltage in the opposite direction to the electrode terminals 13 and 14, and the electrolyte 11 will move from the electrode terminal 14 side to the electrode terminal 13 side, so the reset time will be reset. can do.

FIG. 4 is an example of a circuit that displays the drive time of an electric razor motor using the elements shown in FIG.

In the figure, a series circuit of a resistor R2 and the electricity quantity recorder 15 is connected in parallel to a current detection resistor R1 of a motor drive circuit of an electric razor. Resistance R1 depending on load current
It is configured such that a voltage proportional to the voltage drop across the resistor R1 is applied to the electric quantity integrating recorder 15, and when the load current flowing through the resistor R1 changes, the voltage dropping across the resistor R1 changes, and the voltage applied to the electric quantity integrating recorder 15 changes. The voltage also changes. For example, if you use a large load current such as shaving a thick beard or pressing a razor strongly against your face, the voltage drop across resistor R1 will increase, so the voltage applied to the electric ffi fa calculation recorder 15 will also increase. However, the amount of movement of the electrolytic solution 11, which indicates the cumulative time, increases. That is, when the load current as described above is large and the razor blade wears out quickly, it is possible to more appropriately indicate when to replace the outer blade 8 of the razor by increasing the integrated amount accordingly.

Furthermore, the resistor R2 determines the amount of current flowing through the electricity quantity recorder 15, and by appropriately setting the resistors R1 and R2, the full scale time of the timer can be arbitrarily set under the average usage condition of the electric razor. . For example, if resistors R1 and R2 are selected so that the full scale is 111 hours at the average load current, if used for 3 minutes every day at the average load current, it will be approximately 3 (
Minutes) .

FIGS. 5(a) and 5(b) show external views of an electric razor using the electric FFI integration recorder 15. FIG. Figure 5(a)
The razor body 7 is provided with an electric m-integration recorder 15. In this case, by providing a reset switch SW3 and inputting a reset signal, the electricity quantity integrating recorder 1
Apply a reverse voltage to 5 to return the electrolyte 11 to its original position,
Can be reset. In addition, when the outer cutter 8 is replaced, a reset signal may be automatically inputted and the outer cutter 8 may be reset.

FIG. 5(b) shows an outer cutter frame 9 to which the outer cutter 8 is attached in order to avoid complicating the circuit due to the reset circuit.
A quantity of electricity integration recorder 15 is provided in the apparatus. It should be noted that a disposable type may be used in which the electric m-integration recorder 15 is also replaced when the outer cutter 8 is replaced.

〔Effect of the invention〕

As explained above, in the present invention, the driving time of the motor of the electric razor is measured and the cumulative time is displayed. Therefore, consumable parts such as the outer blade and the inner blade can be calculated from the cumulative time of using the electric razor. It can be replaced at a suitable time.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram of an embodiment of the electric razor according to the present invention, Fig. 2 is an external view of the electric razor according to the present invention, and Fig. 3 is an electrical quantity integrating recorder using electrochemical reactions. Figure 4 is a circuit diagram of an embodiment of an electric razor according to the present invention using an electricity quantity recorder, and Figure 5 (a)
(b) is an external view of an embodiment of an electric razor according to the present invention using a quantity of electricity meter. 4...Timer circuit, 5...LCD driver, 6...
・LCD display circuit, 15... Electricity integration display meter, 81
~B3...Battery, SWI~SW3...Switch. Patent applicant Matsushita Electric Works Co., Ltd. Agent
Patent Attorney Etsushi Kotani Patent Attorney Chief 1) Masaaki Patent Attorney Takao Ito Figure W3 WJ (a) Figure (b) WJ

Claims (1)

[Claims] 1. An electric razor equipped with means for measuring motor driving time, means for integrating and storing the measured time, and means for displaying the stored contents.