JPS6023467B2 - Gas venting device for rechargeable sealed electrical equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a degassing device for a rechargeable sealed electric appliance.

Rechargeable batteries generate gas during charging, so if they are stored in a sealed case, the pressure inside the case will increase and cause an explosion, or the pressure will become so high that internal parts may malfunction.

For this reason, a hole has conventionally been punched in the bottom of the case, but electrical equipment used in water places or washed with water has the problem of water entering the case and causing rust and damage to internal parts.
Therefore, an object of the present invention is to provide a degassing device for a rechargeable sealed electric device that can simultaneously perform waterproofing and degassing without complicating the structure of the device or increasing the number of parts.

In this invention, a waterproof member provided at a switch entrance of a closed case is configured to be elastically deformed in response to a predetermined pressure difference to release gas.

As a result, gas can be vented without increasing the number of parts and with a simple structure of the device without impairing waterproof performance. A first embodiment of a rechargeable electric toothbrush to which an embodiment of the present invention is applied
This is shown in Figures 1-11.

That is, this rechargeable electric toothbrush has a finger rest recess 2 on the side surface of the cylindrical main body 1, as shown in FIGS. 1 to 3.
It has a wavy shape, a switch 3, and an output shaft 4 protruding from the end.It is used by detachably attaching a toothbrush attachment 5, and is hung on a stand 7 containing a built-in primary coil 6 for electromagnetic charging. It is configured to charge and store by coupling. In the main body 1, a mechanism section 9, a switch section 10, a motor 11, and a battery 12 are arranged in a substantially straight line in a case 8, making it easy to hold and stabilize the center of gravity during use. The case 8 is formed into a cylindrical shape with a bottom because this toothbrush is used in a water place and may be washed with water, and only the output shaft hole 13a, the switch hole 13b, and the internal parts loading hole 13c are closed. , so that the sealing material is fitted. The case 8 also forms a wall 15 inside the upper end portion, which accommodates the seesaw switch main body 14 of the switch 3 in the switch hole 13b.
As shown in FIG. 5, two horizontally continuous recesses 16 are formed on the surface of the wall 15 facing the switch hole 13b,
Further, as shown in FIG. 6, a ball insertion hole 17 is bored in the bottom of the wall 15, and the seesaw switch main body 14 has a shaft mounting hole 18 formed in the fulcrum part, and an operation surface 19 perpendicular to the scale mounting hole 18. An actuating arm 20 extends on the opposite side, a concave hole is formed in the tip surface of the actuating arm 20, a compression spring 21 is placed in a bag, and a ball 22 is brought into contact with the tip of the compression spring 21. The main body 14 is inserted through the switch hole 13b, the ball 22 is brought into contact with the recess 16, the shaft insertion hole 17 is aligned with the mouse hole 18 in the compressed state of the compression spring 21, and the internal component loading hole 13c of the case 8 is inserted. Then, insert the L-shaped lever shaft 23 and press fit it into the shaft mounting hole 18.

At this time, a waterproof ring 24 for sealing is housed in the recessed part of the opening of the box opening 18 to seal the inside and outside with the ball insertion hole 17 as a boundary. In this case, the elasticity of the waterproof ring 24 is approximately 2
It is constructed so that it can leak as shown by arrow A when the internal and external pressure difference reaches 3k9/2. In other words, this is because when the rechargeable battery 12 is being charged, a small amount of gas is generated and filled in the sealed case 8, increasing the pressure and causing an explosion or malfunction. It can be used for both removal and extraction. The mechanism part 9, motor 1, rechargeable battery 12, and other internal parts installed inside the case 8 are held by a flock 25 and a charging transformer secondary coil bobbin 26 connected thereto, and are assembled into a unit. Case 8 is also available in this unit format.
The loading can be completed by loading from the internal component loading hole 13c.

That is, as shown in FIG. 4, the block 25 has a cylindrical main body into which the motor 11 is mounted, and a motor shaft insertion hole 27.
On one end surface 28, a fixed shaft 29 and an output shaft support cylinder 31 having a notch 30 in the direction of the shaft are formed upright at a position symmetrical to the motor shaft insertion hole 27, and a cathode is installed at a position symmetrical to the motor shaft insertion hole 27. A fixing column 32 for a metal fitting and a fixing column 33 for a connecting fitting are formed upright, and a leg extends from the rear end of the main body to form a protrusion 34 for connecting a secondary coil bobbin. The mechanism part 9 is
A pinion 36 is fixed to the motor koji 35 of the motor 11, the motor 11 is mounted on the block 25, and the motor shaft insertion hole 27 is installed.
A gear 37 with an eccentric pin that meshes with the pinion 36 by inserting the pinion 36 therein is rotatably mounted on the fixed shaft 29, while a spline 38 is formed on the output shaft 4 and a spline 38 is formed on this surface for converting rotational-oscillating motion. An inverted U-shaped lever 39 is formed as an insert, and by passing the lever 39 through the cutout 30, the output shaft 4 is pushed into the support tube 31 and supported at the bottom, and the lever 39
The output koji 4 is rotatably supported by a metal bearing 41 whose downward concave portion is slidably crowned and abutted on the eccentric pin 40, and which is iron-locked to the notch 30 at the upper end of the support tube 31. Waterproof rubber 43 is installed in a corrugated manner between the upper surface and the lower surface of the case 8 where the output shaft hole 13a is located, and in the circumferential groove 42 formed in the output shaft 4 to provide a waterproof seal. The pinion 36 attached to the motor shaft 35 rotates, the gear 37 rotates, the eccentric pin 40 rotates eccentrically 0 times, and the lever 39 swings by sliding inside the lever 39, causing the output shaft 4 to rotate. Start brushing your teeth.

In this case, since the notch 30 is formed in the support tube 31, the lever 39 can be mounted through the notch 30, and the output shaft 4 and the lever 39 can be integrally formed into a block in advance, which simplifies assembly. Since the connection position between the output shaft 4 and the bar 39 is constant, thrust rattling can be minimized, and the metal bearing 4
Since the notch 30' of 1 is also locked to prevent rotation, it is possible to prevent load fluctuation due to rotation and influence on the waterproof performance of the waterproof rubber 43. Next, the secondary coil bobbin 26 has a cylindrical shape and the rechargeable battery 12 is inserted therein, and an arm 44 with an engaging hole that is connected to the protrusion 34 in a cylindrical shape is formed oppositely at the tip of the secondary coil bobbin 26. An open inner protruding recess 45 is formed in a bent manner, and the secondary coil 46 is wrapped around the cylindrical portion. When assembling, the rechargeable battery 12 is inserted into the secondary coil bobbin 26, and one end of the secondary coil 46 is inserted into the inner protrusion 45.
It is connected and fixed to the anode 48 of the rechargeable battery 12 via a rectifier diode 47 installed therein, and the other end is connected and fixed to the cathode 49 to form a charging circuit. Also, the fixing column 3 for cathode metal fittings
2, one end of the cathode fitting 50 is clamped to the cathode 49, and the other end is attached to the cathode 49.
The rechargeable battery 12 is electrically and mechanically connected to and fixed to the secondary coil bobbin 26 to prevent it from being pulled out from the secondary coil bobbin 26, and to be integrated with the secondary coil bobbin 26 and the block 25, thereby serving as a unit, and to be charged in that state. On the other hand, one end of the connection fitting 51 with a contact spring is attached to the connection fitting fixing column 33, and the saddle point spring 52 is brought into elastic contact with the lever tip surface 23a of the lever shaft 23, and the tip is caused to swing of the lever shaft 23. Thus, the cathode metal fitting 50 is separated from the bush. The block 25 is provided with a spring and pupil positioning post 53 for positioning the mobile phone 52 in a non-contact manner. Therefore, when the switch is operated by the click action of the seesaw switch main body 14, the cathode metal fitting 50 and the connecting metal fitting 51 are brought into scale contact, and electrical opening/closing control is performed. The lower end of the connecting fitting 51 is connected and fixed to the motor terminal 11a, and the motor terminal 11b and the battery anode 48 are directly connected to form a motor drive circuit. Secondary coil bobbin 2
6 is provided with an inner protruding recess 45 at the tip, so that the block 25 and the lower end of the motor 11 are supported on the upper surface of the rear side, and the secondary coil bobbin 26 is positioned.
By placing the diode 47 in the inner position of the inner protruding recess 45 and pressing it into the case 8 with its resin elasticity, the diode 47 can be prevented from shifting due to impact. Since the secondary coil bobbin 26 is made of a resin material, the insulation of the diode 47 is maintained, and there is no need to cover the insulation tube.
Efforts are being made to reduce the number of parts, improve assembly efficiency, and improve diode reliability.

As mentioned above, the internal parts are assembled into the block 25 and the secondary coil bobbin 26, unitized with the cathode metal fittings, and loaded from the internal parts loading hole 13c of the case 8.
By screwing the lower cover 55 through the waterproof member 54, the rechargeable battery 12 is pressed, and the two
The secondary coil bobbin 26 is pushed, the block 25 is pushed through the internal protruding recess 45 of the secondary coil bobbin 26, and the motor 11 is also pushed through the cushioning material 56, thereby arranging the entire component at a predetermined layer within the case.

In this case, the waterproof member 54 has a speaker shape, as shown in FIG. The joint between the component loading hole 13c and the lower cover 55 is interposed to provide a waterproof effect, and the central protrusion 58 is engaged with a positioning recess 59 formed on the back surface of the lower cover 55 to close the entrance edge 57. The structure is designed to prevent kinking and shorting of the cathode connection. This waterproofing section 54 has three functions, so it contributes to a reduction in the number of parts. In addition, as shown in FIG. 7, a small recess 61 is formed in the outer bottom surface 60 of the lower cover 55 at an intermediate position divided into four parts with respect to the center, so that the tip of the radio bench is ironed. 55 is not easily disassembled by general users, but when it is necessary to disassemble the cover, it can be easily disassembled with regular supplies without the need for special tools, and since it is provided on the bottom, the lower cover 55 does not deform when disassembled. This eliminates any trouble when inserting the device into the stand 7 even if the device is inserted into the stand 7. Next, the stand 7 has a cover main body 62
A plurality of locking protrusions 63 are protrudingly provided on the inner surface of the upper end of the side wall, and a charger 64 is inserted from the back side and supported by the locking protrusions 63, and the hair cover 65 is screwed with a set screw 66 to charge the battery. An upper cover 67 is attached to the upper end of the cover main body 62 to hold the container 64 .

The charger 64 includes a primary coil bobbin 68 in which the main body 1 is made of iron and whose secondary coils 46 face each other and are electromagnetically coupled.
Flanges 69a and 69b are formed on the surface of the lower flange 69b for winding the primary coil 6, and a cutout is provided on the surface of the lower flange 69b for connecting the lead wire 70 and the power supply wire 71, as shown in FIGS. 8 to 10. 72, groove forming rib 73, and guide rib 73a
and the power line guide 74 are integrally formed, and the groove forming rib 73
Both wires are positioned and fixed in the groove 75 formed by the above, and a part of the bush 76 is placed on the back surface of the flange 69b, and the primary coil 6 and the saddle race portion are simultaneously molded with resin 77. The yoke 76 is covered with a yoke 78 to prevent the yoke 76 from slipping out and to prevent wire breakage and contact with water. In this case, by forming the groove 75 and positioning and fixing the lead wire 70 and the power source 71 in the groove 75 and molding them simultaneously, there is no risk of wire breakage due to the molding pressure, and the push 76 is connected to the resin 77 and Since it is fixed and fixed by the yoke 78, it is resistant to twisting and pulling of the pusher 76, and there is no risk of deterioration of waterproofness. As described above, in the gas venting device for a rechargeable sealed electric device of the present invention, the waterproof member provided in the switch opening of the sealed case is elastically deformed due to the pressure difference between the inside and outside, so that gas can be vented. This has the effect of waterproofing and degassing at the same time without complicating the device structure or increasing the number of parts.

[Brief explanation of drawings]

FIG. 1 is a side view of an electric toothbrush according to an embodiment of the present invention, FIG. 2 is a vertical side view thereof, FIG. 3 is a vertical front view thereof, FIG. 4 is an exploded perspective view of the mechanism, and FIG. Figure 2 V-
6 is a sectional view taken along line W- in FIG. 2, FIG. 7 is a bottom view of FIG. 1, FIG. 8 is a bottom view of the primary coil bobbin before simultaneous molding, and FIG. 11 is a sectional view taken along the line K-X, FIG. 0 is a sectional view taken along the line X-X in FIG. 8, and FIG. 11 is a perspective view of the bottom seal. 8... Sealed case, 12... Rechargeable battery, 13b...
Switch closing part, 24...waterproof ring (waterproof member). Figure 1 Figure 2 Figure 7 Figure 1 Figure 3 Figure 5 Figure 6 Figure 9 Figure 10 Figure 8

Claims (1)

[Claims] 1. A sealed case, a rechargeable battery built into the case to drive the built-in electrical equipment, a switch opening formed in the case to allow gas generated from the rechargeable battery to leak out, and the switch opening. A degassing device for a rechargeable sealed electric device, comprising a switch device attached through a waterproof member that degass by elastically deforming due to the internal pressure of the device.