JPH0342911B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a sealed rechargeable electric shaver with a built-in storage battery inside the main body case, in which gas generated from the storage battery due to overcharging is released outside the main body case. It is characterized by the means to do so.

[Conventional technology]

Recently, rechargeable electric razors that can be washed with water and soap have become popular, and their cases are sealed to ensure waterproofness.

On the other hand, this type of storage battery releases gas (hydrogen gas) when overcharged. That is, the battery is equipped with a safety valve that releases gas to the outside when the internal gas pressure of the storage battery increases.

[Problems to be Solved by the Invention] In such a sealed rechargeable electric shaver, there is a risk of a gas explosion if gas discharged from the storage battery fills the main body case, and the main body case may become deformed due to an increase in internal pressure. Furthermore, problems such as corrosion of electrical parts and poor contacts occur.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a rechargeable electric shaver that can smoothly release gas from the storage battery to the outside of the main body case as long as the battery is being charged, thereby eliminating the drawbacks of the conventional shaver.

Another object of the present invention is to provide an easy-to-handle rechargeable battery that automatically enters a standby state that allows degassing by simply connecting an external charging member to the charging connection part of the main body case. It's about getting a razor.

Still another object of the present invention is to provide a closed type rechargeable electric shaver that ensures waterproofness during washing in a non-charging state.

[Means to solve the problem]

In the present invention, as shown in the figure, a storage battery 4 is sealed in a main body case 1, and a charging connection part 7 to which a charging member 6 is detachably connected is provided on a part of the outer surface of the main body case 1. In the electric shaver, the charging connection part 7 of the main body case 1 is provided with a gas vent hole 10 that penetrates inside and outside the case, and a valve seat 11 is provided on the inner peripheral surface of the gas vent hole 10 in the main body case 1. A valve 13 for opening and closing the gas vent hole 10 is provided inside the case 1, and this valve 13 has a contact portion 13 on the periphery seated on the valve seat 11.
a, and a pressed portion 13b that protrudes from the center of the contact portion 13a and fits into the gas vent hole 10.
3a, and when the charging member 6 is connected to the charging connecting portion 7, the charging member 6 comes into contact with the pressed portion 13b of the valve 13. connection part 13 of the valve 13
It is characterized in that a is made to float away toward the inside of the case against the spring 14.

[Effect]

Charging member 6 is attached to charging connection part 7 of main body case 1.
When connected in the usual way, a part of the charging member 6 pushes the pressed part 13b of the valve 13 toward the inside of the case with the spring 14.
Push in against the Now the contact part 13a of the valve 13
floats away from the valve seat 11 and the gas vent hole 10 opens.
Therefore, the gas discharged from the storage battery 4 can always be discharged to the outside of the main body case 1 through the gas vent hole 10 during charging.

In the non-charging state when the charging member 6 is removed from the charging connection part 7, the spring 14 works to press the contact part 13a of the valve 13 against the valve seat 11, and the gas vent hole 1 is pressed against the valve seat 11.
0 is closed.

〔Effect of the invention〕

Therefore, according to the present invention, when the charging member 6 is connected to the charging connection part 7 of the main body case 1 and placed in a charging state, the gas vent hole 10 is automatically opened and the storage battery 4 is always connected.
The gas emitted from the main body case 1 can be released outside the main body case 1. As a result, a general user can prevent the problem of gas generation due to overcharging without any prior knowledge, without having to perform any special operations or labor for degassing.

Moreover, when the charging member 6 is removed from the charging connection part 7, the gas vent hole 10 is automatically closed, so water and dust will not enter the main body case 1 through the gas vent hole 10. It is suitable for washable type rechargeable electric shavers.

In particular, the valve seat 11 is located inside the case of the gas vent hole 10.
and the valve 13, it is possible to effectively prevent external dust and foreign matter from getting caught between the valve seat 11 and the contact portion 13a of the valve 13 seated thereon.
No external force is applied to the valve 13. Therefore, it is possible to reliably prevent water and dust from entering the main body case 1 through the gas vent hole 10 during non-charging, that is, during normal use.

Further, since the valve 13 has a pressed portion 13b protruding from the center of the contact portion 13a, and this pressed portion 13b is fitted into the gas vent hole 10, the fitting between the pressed portion 13b and the gas vent hole 10 is The guiding action is effectively exerted, and the valve 13 has a contact portion 13 on its periphery.
The valve a operates smoothly without being tilted, twisted or misaligned between the position in which the valve seat a is seated on the valve seat 11 and the position in which it is lifted off the valve seat 11. Therefore, when the charging member 6 presses the pressed portion 13b of the valve 13 during charging, the contact portion 1 of the valve 13
A gas passage is formed around the entire circumference between 3a and the valve seat 11 to ensure smooth gas release. At the same time, the contact portion 13a of the valve 13 is reliably seated on the valve seat 11 from a floating state, and in this respect as well, intrusion of water and dust from the outside is reliably prevented.

[Embodiment] The drawings illustrate a rechargeable electric shaver according to the present invention, the body case 1 of which is made of plastic and has a sealed structure as shown in FIG.
An outer cutter 2 and an inner cutter 3 that slides on the inner surface of the outer cutter 2 are mounted on the upper part of the main body case 1, and inside the main body case 1 there is a drive mechanism that drives the inner cutter 3, although not shown, and a drive mechanism for driving the inner cutter 3. It has a motor, a storage battery 4 such as a nickel-cadmium alkaline storage battery, and a charger 5 whose output end is connected to the storage battery 4.

At the bottom of the main body case 1, there is a charging connection part 7 that allows a plug-in connection of a charging member 6 connected to a commercial power source.
It is equipped with This charging connection part 7 includes a recessed part 8 recessed in the bottom of the main body case 1, and charging power supply pins 9, 9 are protruded in parallel to the recessed part 8 through an inner inner wall 8a of the recessed part 8. , 9 are connected to the input terminal of the charger.

In such a rechargeable electric shaver, the present invention is characterized in that the charging connection portion 7 is provided with a degassing means. In FIGS. 1 and 3, the gas venting means is such that a gas venting hole 10 is opened between both power supply pins 9, 9 on the inner wall 8a of the recess 8 so as to penetrate inside and outside the case. A valve seat 11 is integrally formed to protrude inside the case, and a valve housing 12 is arranged to cover the upper outer periphery of the valve seat 11.
2, a vertically movable valve 13 is inserted into the valve seat 11.
It is provided with a spring 14 that always presses toward.

The valve 13 includes a flat contact portion 13a and a pressed portion 13b integrally protruding from the center of the lower surface of the contact portion 13a. The contact portion 13a of the valve 13 is seated on the valve seat 11 and the gas vent hole 1
0 is always kept closed. Valve 1
In the state in which the contact portion 13a of No. 3 is seated on the valve seat 11, the pressed portion 13b is loosely fitted into the gas vent hole 10, and its tip (lower end) protrudes downward from the inner inner wall 8a of the recess 8.

Note that the valve housing 12 is open at the bottom, and the valve 13
When the valve 1 is pushed up against the spring 14, the valve 1
A gas passage 15 that communicates the inside of the main body case 1 and the gas vent hole 10 is formed between the valve seat 11 and the valve seat 11 .

The charging member 6 has a pair of connection holes 17 and 17 in which a spring 16 is installed, and when charging, the charging member 6 is inserted into the recess of the charging connection part 7 from below the main case 1 as shown in FIG. 8, the connection holes 17, 17 are inserted into the power supply pins 9, 9 which protrude in parallel, respectively. At the same time, the insertion end surface of the charging member 6 comes into contact with the protruding end of the pressed portion 13b of the valve 13, thereby pushing the contact portion 13a of the valve 13 against the spring 14 toward the inside of the case. In this case, since the pressed portion 13b is formed so as to be able to protrude and retract in a direction parallel to the protruding direction of the power supply pins 9, 9, when the charging member 6 is inserted into the recess 8, the charging member 6 is parallel to the It is inserted and guided by the power supply pins 9, 9, and advances straight without tilting with respect to the recess 8, so that the pressed part 13b also does not tilt.
Pressed straight down. This means that the contact part 1 of the valve 13
The gas passage between the valve seat 3a and the valve seat 11 is opened all around, and efficient gas discharge is performed. Therefore, the gas discharged from the storage battery 4 due to overcharging does not fill the main body case 1 and flows through the gas passage 15.
The gas then passes through the gas vent hole 10 and is discharged to the outside of the main body case 1 through the gap created between the recess 8 and the plug portion of the charging member 6.

When the charging member 6 is removed from the recess 8 after charging is completed, the contact portion 13a of the valve 13 returns to its original position on the valve seat 11 under the force of the spring 14, thereby closing the gas vent hole 10. Water and dust will not enter the case through the gas vent hole 10 when the electric shaver is washed with water.

If the pressed portion 13b of the valve 13 is located on the inner back wall 8a side of the recess 8 and the power supply pins 9, 9 are present in the recess 8 as in the illustrated example, other objects may enter the recess 8. Since the power supply pins 9, 9 obstruct this movement, it is possible to effectively prevent the pressed portion 13b from being damaged due to contact interference with other objects.

[Another embodiment example]

The gas released from the safety valve of the storage battery 4 may be guided directly into the valve housing 12 without filling the main body case 1, and then released to the outside of the case through the gas vent hole 10 as described above. .

The charging connection part 7 provided on a part of the outer surface of the main body case 1 and the charging member 6 inserted therein are not limited to the above-mentioned format. For example, a power supply pin 9 is provided on the charging member 6 side, and this power supply pin 9 A connecting hole 17 into which the connecting hole 17 is inserted may be provided on the recess 8 side.

[Brief explanation of drawings]

The drawings illustrate the rechargeable electric shaver according to the present invention, and FIG. 1 is a longitudinal sectional front view of the main part, FIG. 2 is a partially cutaway front view of the whole, and FIG. 3 is a cutaway perspective view of the main part. 4 are longitudinal sectional front views of the main parts in a charged state. 1...Body case, 2...Outer blade, 3...Inner blade,
4...Storage battery, 6...Charging member, 7...Charging connection part, 8...Recess, 9...Power supply pin, 10...
Gas vent hole, 11... Valve seat, 12... Valve housing, 13...
...Valve, 13a...Contact part of valve, 13b...Pressed part of valve, 14...Spring.

Claims (1)

[Claims] 1. A storage battery 4 is hermetically built into the main body case 1,
In a rechargeable electric shaver equipped with a charging connection part 7 on a part of the outer surface of the main body case 1 to which a charging member 6 is detachably connected, the charging connection part 7 of the main body case 1 is provided with a part that penetrates inside and outside of the case. A valve seat 11 is provided on the inner peripheral surface of the gas vent hole 10 in the main body case 1, and a valve 13 for opening and closing the gas vent hole 10 is provided inside the main body case 1. The valve 13 includes a peripheral contact portion 13a that is seated on the valve seat 11, and a pressed portion 13b that protrudes from the center of the contact portion 13a and fits into the gas vent hole 10. A spring 14 is provided on the valve seat 11 to press and bias the contact portion 13a of the valve seat 13, and when the charging member 6 is connected to the charging connection portion 7, the charging member 6 is connected to the valve. 13
A rechargeable electric shaver characterized in that the connecting portion 13a of the valve 13 is lifted off toward the inside of the case against the spring 14 by abutting against the pressed portion 13b of the rechargeable electric shaver.