JPH0546835B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a rechargeable electric shaver with a built-in storage battery in the main body case, and a means for releasing gas generated from the storage battery due to overcharging to the outside of the main body case. Has characteristics.

[Conventional technology]

In this type of storage battery, gas is generated internally during overcharging, so a safety valve is provided at the positive terminal to release gas to the outside when internal gas pressure increases.

On the other hand, sealed rechargeable electric shavers with a storage battery sealed inside the main body case are becoming popular in order to enable washing with water.

[Problem to be solved by the invention]

In such a closed type rechargeable electric shaver,
If the gas (hydrogen gas) released from the storage battery diffuses and fills the main body case, there is a risk of a gas explosion.
In addition, the main body case may become deformed due to the increase in internal pressure,
Furthermore, the gas and the electrolytic solution released together with the gas cause problems such as corrosion of other electrical parts and contact failure.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a rechargeable electric shaver that can eliminate the above-mentioned problems by directly discharging the gas emitted from the storage battery to the outside of the main body case without diffusing it into the main body case.

Another object of the present invention is to provide a rechargeable electric shaver equipped with a degassing means that has a small number of parts and is easy to assemble.

[Means to solve the problem]

The present invention is a rechargeable electric shaver in which a storage battery 4 is sealed in a main body case 1.A recess 7 is formed in a part of the outer surface of the main body case 1. Hole 1 leading inside and outside
7, and a gas discharge cylinder part 10 having a gas passage 12 is inserted into this hole 17, and the gas passage 12 is connected to a crown part 9 surrounding at least the part of the storage battery to which the gas discharge safety valve is attached. The gas discharge cylinder part 10 is formed of an elastic material so that the gas passage 12 can elastically expand due to the rise in gas pressure in the crown part 9 and release gas to the outside of the main body case 1. It is characterized by:

[Effect]

The recess 7 is provided in a part of the outer surface of the main body case 1 so that the tip of the gas discharge tube 10 faces into the recess 7 and does not directly expose the outer surface of the main body case 1. This is to protect the tip of the cylindrical portion 10 from damage caused by contact with other objects.

The gas passage 12 of the gas discharge cylinder section 10 is in a substantially closed state so that water does not enter into the main body case 1 in a normal state. Here, "substantially" includes a state in which water cannot enter due to its own surface tension.

The gas released from the gas release safety valve of the storage battery 4 is inside the crown part 9 and is not diffused into the main body case 1. The gas within this crown portion 9 is directly discharged to the outside of the main body case 1 via a gas discharge cylinder portion 10 communicating therewith.

In this case, since the gas discharge cylinder part 10 is made of an elastic material, when the generated gas in the crown part 9 reaches a predetermined internal pressure, the gas expands to push the gas passage 12 open. Gas is released into the recess 7, and the gas released here diffuses to the outside of the case.

In short, the gas discharge cylinder 10 functions as an exhaust nozzle that discharges only the gas inside the case to the outside of the case while preventing water and the like from outside the case from entering the inside of the case.

〔Effect of the invention〕

According to the present invention, the tip of the gas discharge tube 10 faces into the recess 7 and does not directly face the outer surface of the main body case 1, so that the tip of the gas discharge tube 10 does not come into contact with other objects and be damaged. The gas discharge performance can be maintained satisfactorily over a long period of time without causing foreign matter to enter the gas passage 12 and cause clogging.

Since the gas discharge cylinder part 10 only needs to be inserted into the hole 17 provided in the wall of the recess 7 by utilizing its own elasticity, it is easy to assemble, requires a small number of parts, and is inexpensive. Can be implemented.

Moreover, the gas discharge cylinder portion 1 having the gas passage 12
Since the nozzle 0 is made of an elastic material and functions as a nozzle exclusively for exhaust, the gas generated from the storage battery 4 due to overcharging, etc. is covered at least around the safety valve for gas release on the side of the storage battery 4. After being once released inside the crown part 9, it is directly released to the outside of the main body case 1 via the gas discharge tube part 10, thereby eliminating the conventional problems caused by gas filling the main body case 1. Furthermore, it is possible to reliably prevent water, dust, etc. from entering the main body case 1 from the outside via the gas discharge cylinder section 10.

〔Example〕

The drawing shows an example of a rechargeable electric shaver according to the present invention, in which a body case 1 is made of plastic and has a sealed structure. A contacting inner blade 3 is attached, and inside the main body case 1, although not shown, there is a drive mechanism for driving the inner blade 3, a driving motor thereof, a storage battery 4 such as a nickel-cadmium alkaline storage battery, and a storage battery at the output end. It has a built-in charger that connects to 4.

The bottom of the main body case 1 is provided with a plug connection part 6 into which a plug 5 as a charging member connected to a commercial power source is inserted. The insertion connection part 6 forms a downwardly opening recess 7 in the bottom wall of the main body case 1, and protrudes charging power supply pins 8, 8 through the inner inner wall of the recess 7. 8, 8 is of standard specification connected to the input terminal of the charger.

In such a rechargeable electric shaver, a storage battery 4
A gas venting member is provided on the storage battery 4 side to directly discharge gas emitted from the main body case 1 to the outside.

The gas venting member shown in the figure is formed entirely of a funnel-shaped rubber material or the like, and includes an upper crown portion 9 and a gas discharge cylinder portion 1 which is formed by narrowing a part of the crown portion 9 and integrally protrudes downward.
It is constructed as an elastic cap 11 having a diameter of 0. The gas discharge cylinder part 10 has a narrow gas passage 12 that communicates with the inside and outside of the crown part.

This elastic cap 11 uses its own elasticity to cover the crown part 9 so as to tightly surround the outer periphery of the lower end of the storage battery 4, that is, the outer periphery of the positive electrode terminal part 13 having a safety valve for gas release. A protrusion 14 formed on the inner periphery of the open end of the portion 9 is fitted and locked into an existing circumferential groove 15 on the outer circumferential side of the storage battery 4 near the positive terminal. Of course, this crown part 9 is made to have elasticity in order to improve the ease of attaching it to the storage battery 4 and the sealing property, but it is sufficient as long as it surrounds the gas released from the safety valve so that it does not diffuse into the main body case 1. It is clear that the elastic force is not particularly limited.

In this manner, with the elastic cap 11 integrally attached to the storage battery 4 in advance, the storage battery 4 is attached to the main body case 1.
It will be installed inside. At this time, a bulging large-diameter portion 16 is formed on the outer periphery of the middle part of the gas discharge cylinder 10, and a hole 17 is made in the inner back wall of the recess 7, so that the tip of the gas discharge cylinder 10 is bulged. The large diameter portion 16 is inserted into the hole 17 until it comes into contact with the inner wall of the recess 7. The tip of the gas discharge tube 10 now protrudes into the recess 7 and faces outside the main case.

The gap between the gas discharge tube 10 and the hole 17 is sealed with a sealing material 18 to prevent water from entering the case. This sealing material 18 is not particularly required, and waterproofness can be achieved by simply connecting two large-diameter bulging portions 16 like a gourd and elastically engaging the constricted portions with the holes 17 of the main body case 1. Can be maintained.

Lead wire 19 from positive terminal 13 of storage battery 4
The cap 9 is led out by passing through a part of the crown 9 or between the bonding surfaces between the circumferential surface of the storage battery 4 and the crown 9 attached thereto as shown in the figure.

In such a case, gas released from the gas release safety valve of the positive terminal 13 of the storage battery 4 due to overcharging, etc., will accumulate inside the communication part of the crown part 9, and when the internal pressure of the crown part 9 increases, the gas will be released from the communication valve. The gas passage 12 of the cylindrical portion 10 expands elastically and is directly discharged to the outside of the main body case 1.

The gas passage 12 of the gas discharge cylinder part 10 facing the outside of the main body case 1 is formed to be as small as possible within the range that allows gas to be released. There is no risk of water entering the main body case through the passage 12. In order to more completely prevent water from entering from outside the case, the gas passage 12 is tightly closed by the elasticity of the gas discharge tube 10 itself under normal conditions, and gas pressure is applied to the gas passage for the first time when gas is discharged. 12
expands and expands to allow gas to pass through.

Further, the crown portion 9 may be configured to cover not only the positive terminal portion 13 of the storage battery 4 but also the entire storage battery 4.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view showing an embodiment of a rechargeable electric shaver according to the present invention, and FIG. 2 is an enlarged view of the main parts thereof. 1...Body case, 2...Outer blade, 3...Inner blade,
4... Storage battery, 9... Crown part, 10... Gas discharge tube part, 11... Elastic cap, 12... Gas passage.

Claims (1)

[Claims] 1. A rechargeable electric shaver in which a storage battery 4 is sealed in a main body case 1, in which a recess 7 is formed in a part of the outer surface of the main body case 1, and a wall of the recess 7 is provided with a main body. A hole 17 that communicates with the inside and outside of the case 1 is provided, and a gas release tube 10 having a gas passage 12 is inserted into the hole 17, and the gas passage 12 is provided with at least a gas release safety valve of the storage battery. Crown part 9 surrounding the
The gas discharge cylinder part 10 is made of an elastic material so that the gas passage 12 can elastically expand due to the increase in gas pressure in the crown part 9 and release the gas to the outside of the main body case 1. electric razor.