JP2564568B2 - Electric razor - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a timing indicator for processing shaver of an electric razor.

(Prior Art) Conventionally, in an electric razor, the shaved scraps are usually accumulated in the inner blade or the surrounding of the blade driving unit, and the user is to some extent when using the shaver. I was trying to clean the shavings.

However, in such an electric razor, just looking from the outside does not tell how much beard scraps are accumulated inside. Therefore, if the electric razor is continuously used with a large amount of beard scraps, there is a problem that the shaving taste is deteriorated or the shaving speed is slowed down, so that the original performance cannot be sufficiently exhibited. In addition, a large load is applied to the drive unit of the blade, which is also a factor that shortens the life of the motor and circuit of the electric razor. There are also problems such as beard scattering and unsanitary conditions.

Therefore, for example, as disclosed in Japanese Utility Model Laid-Open No. 61-160866, two optical fibers each having one end optically connected to a light emitting element and a light receiving element face each other so that light can pass therethrough, and It has been proposed to detect beard debris when it is collected. However, such a configuration in which two optical fibers are opposed to each other is
It is difficult to align the two, and when the electric razor is tilted or moved, the whiskers accumulated between the two often shift and cannot be detected, so the amount of whiskers can be accurately detected. There is a problem that you can not.

(Object of the Invention) The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide an electric razor that is easy to manufacture and that can reliably display information corresponding to the accumulation state of beard scraps. And

(Structure of the Invention) The present invention relates to a computing device that computes an integrated value of a load current of a motor and a usage time, and a display device that displays information corresponding to the amount of accumulated whiskers according to the integrated value of this computing device. It is an electric razor with and.

With this configuration, the integrated value of the motor load current and the usage time, which correlates with the darkness of the beard, is displayed as information corresponding to the amount of accumulated beard scrap, and thus the degree of accumulated beard scrap is known.

(Embodiment) FIG. 1 shows a circuit block according to a first embodiment of the present invention.
2 (a) and 2 (b) show the front and side faces of the same embodiment.

In FIG. 1, 1 is a power source, 2 is an operation switch, 3 is a drive motor, 4 is a computing unit (MPU) composed of a microcomputer, a counter and the like, and when the switch 2 is turned on, integration of usage time is started. Reference numeral 5 denotes a display, which displays information corresponding to the amount of accumulated whiskers according to the integrated value of the arithmetic unit 4.
In FIG. 2, 101 is an electric razor body, 102 is an outer blade, and 103 is an outer blade frame. Here, as the display unit 5, a plurality of light emitting diodes (LEDs) 50 are used to collect whiskers. The amount is displayed.

In the above configuration, when the switch 2 is turned on, the motor 3 rotates and the electric razor is in use. At this time, the arithmetic unit 4 counts the use time, and when the count value set inside is reached, the LED 50 is turned on in stages and information corresponding to the amount of accumulated whiskers is displayed. In addition,
This display may have more levels than shown,
It may be an analog display.

FIG. 3 shows a flowchart of the above operation. Explaining this, first, initial setting is performed, and when the switch is turned on, a timer is started, and it is determined whether or not T−t ≦ (4/5) T (steps S ₁ to S ₄ ). Here, T is a timer set value, and t is a current time. When the above determination is YES, the first LED of the LEDs 50 is turned on (step
S ₅ ).

Similarly, if T−t ≦ (3/5) T, the second LED
Is turned on (steps S ₆ and S ₇ ), and if T−t ≦ (2/5) T, the third LED is turned on (steps S ₈ and S ₉ ), and T−t ≦ (1 /
5) When it becomes T, turn on the fourth LED (step S ₁₀ ,
S _11), turns on the fifth LED if the T-t ≦ 0 (step S _12, S _13).

If the switch is turned off in the above steps,
As an interrupt routine updates the T-t = T (step S ₁₄ to S _16), proceeds to Step S _3. In this way, the display of the LED 50 is sequentially changed according to the accumulated use time, so that the user can easily and surely know the timing of cleaning the electric razor or the like. In addition, the structure for that is simple and can be realized at low cost.

4 and 5 show a second embodiment of the present invention. The present embodiment is characterized in that it has a timer and the timer time can be set arbitrarily. That is, since the amount of accumulated beard scraps changes depending on the usage method of the user, the darkness of the beard, and the like, the user can arbitrarily set the time that corresponds to the amount of beard scraps he wants to process.

Then, as the display unit 5, the timer set value and timer display element 51 (LCD, LED, etc.) and the beard scrap processing display LED 5
2, a timer preset button 6 and a preset volume 7.

With the above configuration, the user turns the preset volume 7 while pressing the preset button 6 to set the numerical value displayed on the display element 51. When the preset button 6 is released, the timer count value is displayed on the same element 51.
Then, when the switch 2 is turned on, the value displayed on the element 51 becomes smaller, and when it becomes zero, the LED 52 lights up to inform the timing of the treatment of the beard scraps.

In addition, the user can freely use the above display not only for the timing of the treatment of the beard scraps, but also for the blade replacement time, the reminder to charge the battery power source, and the like. Furthermore, it is possible to have a function of a clock or a stopwatch.

6 and 7 show a third embodiment of the present invention. In this embodiment, in addition to the first embodiment described above, a human body detection sensor is provided,
When the outer blade comes into close contact with the human body, the usage time is integrated. In FIG. 6, 8 is a human body detection sensor, 9 is an amplifier, and 10 is a comparator, and the output is given to the arithmetic unit 4.

FIG. 8 shows a specific example of the circuit of the human body detection sensor 8,
FIG. 9 shows a timing chart of the operation. The circuit described above utilizes the property that the input impedance of the C-MOS inverter 81 is high. When the input is used in an electrically floating state, external noise such as static electricity or induction of hum causes induction noise as shown in FIG. When the human body 100 touches the outer blade 102, the human body 100 operates as shown in FIG. 9 to detect the human body.

Therefore, in this embodiment, the operation of the counter is not started when the switch 2 is turned on, but the counting operation is started when the human body approaches or contacts the outer blade, and the counting operation is started when the human body is separated from the outer blade again. Will stop.
Therefore, it is possible to manage the amount of beard waste with higher accuracy.

The human body detection sensor 8 may be an infrared sensor, an ultrasonic sensor, or the like in addition to the touch sensor as described above, as long as it can detect the human body.

FIG. 10 shows a fourth embodiment of the present invention. In this embodiment,
A means for detecting the load current of the motor 3 or the like is added, and the integrated value of the current flowing per unit time and the operating time is obtained. The external appearance may be similar to that of FIG. 2 of the first embodiment.

That is, the current detector 11 is inserted into the circuit of the motor 3, and the current-voltage conversion is performed by this detector 11, and thereafter,
A digital detection output is given to the arithmetic unit 4 via the amplifier 12 and the A / D converter 13. When the integrated value by the arithmetic unit 4 reaches the set value, the display unit 5 displays information corresponding to the amount of beard scraps. Thus, the load current correlates with the darkness of the whiskers, a dark person has a large load current and a large amount of accumulation, and a thin person has a small load current and a small amount of accumulation,
According to this embodiment, it is possible to accurately detect the amount of beard scraps.

11 and 12 show a fifth embodiment of the present invention. In the present embodiment, the preset means (6, 7) for arbitrarily setting the integrated current value is added to the configuration for detecting the load current as in the fourth embodiment.

That is, it is possible to arbitrarily change the set value displayed on the display element 53 with the preset volume 7 while pressing the preset button 6. The set value in this case is the current integrated value, and when switch 2 is turned on with this display setting, the gradually detected integrated value is subtracted, and when the display becomes zero, the LED 52 lights up and the shavings treatment is performed. Encourage.

Thus, since the initial set value of the integrated value can be set arbitrarily, it is possible to accurately set the timing for prompting the processing of the beard scraps by turning on the LED 52 according to the individual difference between the person with a thick beard and the person with a thin beard. Moreover, it is possible to freely set it according to the preference of a person who wants to clean at an early timing.

(Effects of the Invention) As described above, according to the present invention, the integrated value of the load current of the motor and the usage time is calculated and displayed on the display device as information corresponding to the amount of accumulated whiskers. With a simple structure, it is possible to know the time for cleaning beard scraps, etc., reliably at low cost and in correspondence with the darkness of the beard. Further, when the electric razor approaches or contacts the human body, that is, the time during which the shave is actually shaved is measured, so that the use time can be obtained more accurately. In addition, since the preset means is provided, it is appropriate for the user,
The display time can be arbitrarily set.

[Brief description of drawings]

FIG. 1 is a block configuration diagram of an electric shaver according to a first embodiment of the present invention, FIGS. 2 (a) and 2 (b) are front and side views showing the appearance of the same embodiment, and FIG. FIG. 4 is a block diagram of the second embodiment, FIG. 5 is a front view of the same embodiment, FIG. 6 is a block diagram of the third embodiment, and FIG. 7 is a front view of the same embodiment. FIG. 9 is a circuit diagram of the human body detecting sensor portion of the same embodiment, FIG. 9 is a timing chart of its operation, FIG. 10 is a block configuration diagram according to a fourth embodiment, FIG. 11 is a block configuration diagram according to a fifth embodiment, First
FIG. 12 is a front view of the same embodiment. 2 ... switch, 4 ... arithmetic unit, 5 ... indicator (display unit), 6 ... preset button, 7 ... preset volume, 8 ... human body detection sensor, 11 ... current detector,
101 …… Main body, 50 …… LED, 51,53 …… Timer setting value and timer display element (display device), 52 …… LED (display device).

Claims (3)

(57) [Claims] 1. A calculation device for calculating an integrated value of a load current of a motor and a usage time, and a display device for displaying information corresponding to the accumulated amount of beard scraps according to the integrated value of the calculation device. An electric razor characterized by that. 2. The electric device according to claim 1, wherein the arithmetic unit has a human body sensor, and measures the usage time while the human body sensor detects the human body. Razor. 3. An apparatus according to claim 1, further comprising a presetting device capable of setting an arbitrary value, wherein the arithmetic unit subtracts the integrated value from the value set by the presetting device. The electric razor according to item 1 or 2.