JP2010114022A - Waterproof case for electric appliance - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a waterproof case for an electric appliance to further enhance waterproofness of the case. <P>SOLUTION: This includes the case body (3, 13) equipped with the main space to house a functional member, and a subspace to be communicated with the main space via openings (8, 18), a cable (50) connected to the functional member and extended and installed toward outside via the subspace, and a bush (54) surrounding the cable and formed from the subspace over to the case body includes pressurization faces (9, 19) which are protruded toward the bush in the inner peripheral face of the subspace and contracted in the diameter as they are separated from the main space, and the bush includes a flange member (70) which has a pressure receiving face (76) that is engaged with the bush, contracted in the diameter as it is separated from the main space, and abutted on the pressurization face, and moves toward an opening along an axial direction of the bush accompanying this abutment, and an annular elastic member (80) which is engaged with the bush between the flange member and the opening, and closely contacted with the peripheral edge of the opening accompanied with movement of the flange member. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a waterproof case for an electric appliance that houses a functional member.

This type of waterproof case is used for an AC adapter, for example, and a power supply board is disposed inside the case. An electronic component as a functional member is mounted on the substrate, and the AC power is converted into DC power in the component.
In addition, the substrate is connected to a commercial power supply via a plug, and is connected to an electric device or the like via a cable.

  Here, the outer jacket of the cable is surrounded by a bush, and the bush has a function of preventing the cable from being bent. On the other hand, since the bush is disposed from the inside of the case to the outside, there is a concern that moisture or the like may enter the case. Therefore, a technique in which an encapsulating resin material is filled in the case is disclosed (for example, see Patent Documents 1 and 2). As a technique for ensuring the waterproofness of the case, a structure in which an O-ring is closely attached to the periphery of the opening of the case is also known (see, for example, Patent Document 3).

Japanese Patent No. 3815733 International Publication No. 07/116791 Pamphlet JP 2007-73269 A

However, as in Patent Documents 1 and 2, when the encapsulating resin material is filled in the case, there is a problem that the man-hours until the case is completed become very long. This is because the encapsulating resin material takes about 8 hours to be injected and dried, and the drying time of the resin material is further added to the solidification time of the resin forming the case.
In addition, the encapsulating resin material is expensive, and there is a problem that the manufacturing cost cannot be reduced if a large amount is filled.

On the other hand, in the technique of Patent Document 3, the O-ring is disposed between the flange portion of the connector and the peripheral edge of the opening of the case, and the encapsulating resin material is not used.
However, a special force for pressing the flange portion toward the O-ring does not act on this connector, and there is a problem that the waterproofness of the case cannot be further improved.

  Then, the objective of this invention is providing the waterproof case for electric appliances which eliminates the said subject and improves the waterproofness of a case further.

  According to a first aspect of the invention for achieving the above object, a main body that houses a functional member, a case main body that includes a sub space that communicates with the main space through an opening, and the functional member are connected to the sub space. A cable extending toward the outside of the case body, and a bush that surrounds the cable and is formed from the sub space to the outside, and the case body has a bush on the inner peripheral surface of the sub space. The bushing is engaged with the outer peripheral surface of the bush, and the diameter is reduced as it is separated from the main space, and the pressure surface is reduced to the pressure surface. A flange member that has a pressure-receiving surface to be contacted and moves toward the opening along the axial direction of the bush along with the contact, and is engaged with the outer peripheral surface of the bush between the flange member and the opening. And close to the periphery of the opening as the heel member moves And an annular elastic member that.

According to the first invention, the waterproof case for an electric appliance includes a case main body, a cable, and a bush, and the case main body includes a pressure surface. Specifically, the pressing surface protrudes toward the bush on the inner peripheral surface of the sub space, and is reduced in diameter as it is separated from the main space.
On the other hand, a flange member and an annular elastic member are engaged with the outer peripheral surface of the bush. This flange member has a pressure receiving surface that is reduced in diameter as it is separated from the main space and is brought into contact with the pressure surface, and with the contact between the pressure surface and the tapered surfaces of the pressure receiving surface, Move toward the opening along the axial direction. Moreover, the elastic member is arrange | positioned between the collar member and opening, and closely_contact | adheres to the periphery of opening with the movement of the collar member mentioned above.

  As described above, a force that presses the elastic member against the periphery of the opening is generated by the wedge action between the tapered surfaces, and the elastic member closes a gap between the flange member and the wall surface that forms the opening. Therefore, it is possible to prevent moisture from entering the main space from the peripheral edge of the opening through the inner peripheral surface of the sub space and the wall surface around the opening. As a result, the waterproofness of the waterproof case is further enhanced.

In addition, according to this structure, the encapsulating resin material is not required as compared with the conventional case, and the man-hour is extremely shortened, so that the manufacturing cost of the waterproof case can be reduced.
According to a second aspect of the present invention, in the configuration of the first aspect of the present invention, the flange member is formed so that the elastic member can be received, and the diameter of the flange member is reduced as it is separated from the main space, and the pressure surface and the pressure receiving surface are in contact with each other. Accordingly, it has a pressing surface that pushes the elastic member toward the axis of the bush.

  According to the second invention, in addition to the action of the first invention, the flange member has a pressing surface, and the pressing surface can receive the elastic member and is separated from the main space. The diameter is reduced. When the pressing surface generates a force on the flange member by pressing the elastic member against the peripheral edge of the opening due to the wedge action between the tapered surfaces, the elastic member is directed toward the axis of the bush, in other words, the diameter of the bush is reduced. Can be pushed in the direction.

As a result, the elastic member closes the gap between the flange member and the bush, travels through the gap between the outer peripheral surface of the bush and the inner peripheral surface of the flange member, and can prevent moisture from entering the main space from the periphery of the opening.
The third invention is characterized in that, in the configuration of the first and second inventions, the flange member has a substantially annular shape, and the pressure receiving surface is formed over the entire circumference of the flange member.

According to the third invention, in addition to the effects of the first and second inventions, the pressure receiving surface is formed over the entire circumference of the flange member. Compared to the case where the surface is formed only at both end portions, it is possible to attach the substantially annular flange member to the bush without considering the arrangement of the pressure receiving surface.
According to a fourth invention, in the configurations of the first to third inventions, the flange member is formed of a material that is more slippery than the case body.

  According to the fourth invention, in addition to the effects of the first to third inventions, if the flange member is formed of a material that is more slippery than the case body, the pressure surface of the case body is the flange member. When contacting the pressure receiving surface, the flange member moves smoothly, and the elastic member quickly contacts the periphery of the opening. In addition, there is no concern of gas generation from the lubricant as compared with the case where the lubricant is applied to the pressure surface, the pressure receiving surface or the like in order to move the eaves member smoothly.

According to a fifth invention, in the configuration of the first to fourth inventions, the case main body is arranged on the upper side of the cable, the lower case is arranged on the lower side of the cable and is fitted to the upper case main body. It comprises a case main body, and the pressurizing surface is provided on both of the upper case main body and the lower case main body, respectively.
According to the fifth invention, in addition to the actions of the first to fourth inventions, if a pressure surface is provided on both the upper case body and the lower case body, the upper case body and the lower case body, As a result of the fitting, a wedge action occurs between the tapered surfaces, and the elastic member comes into close contact with the periphery of the opening. As described above, since the waterproof effect can be obtained only by fitting the upper case main body and the lower case main body, this point also contributes to shortening of man-hours.

A sixth invention is characterized in that, in the configurations of the first to fifth inventions, the waterproof case is used for an AC adapter that generates DC power from a commercial power source.
According to the sixth invention, in addition to the effects of the first to fifth inventions, the above-described configuration has a particularly remarkable effect in the AC adapter used in various environments that can come into contact with moisture.

  ADVANTAGE OF THE INVENTION According to this invention, the waterproof case for electric appliances which uses the wedge effect | action of taper surfaces and improves the waterproofness of a case further can be provided.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an AC adapter 1 of this embodiment. In this adapter 1, DC power is generated from AC power, which is a commercial power supply, and this DC power is used for driving an electric device or charging a secondary battery.

This adapter 1 has a waterproof case 2 made of a synthetic resin having heat resistance and insulation, and the case 2 of this embodiment includes an upper case body (case body) 3 and a case 2 as shown in FIG. A lower case body (case body) 13 is formed.
The case body 3 has a cup shape opened downward (FIG. 4), and the opening end 4 is formed in a substantially square shape. In addition to FIG. 4, a protrusion 6 is formed on the right side of the opening end 4 in FIGS. 1 and 2, and this protrusion 6 also opens downward.

  On the other hand, the case main body 13 has a cup shape opened upward (FIG. 5), and the opening end 14 is also formed in a substantially square shape. On the right side of the end 14, a protrusion 16 that opens upward is formed. Further, the bottom surface side of the case body 13 bulges downward, and a plug 30 is formed at the bulged portion, so that the case 2 can be directly inserted into an outlet (direct plug-in method).

  Then, the case main body 3 is put on the case main body 13, and the openings of the opening ends 4 and 14 and the protrusions 6 and 16 are ultrasonically welded. As a result, the case body 3 is airtightly fitted to the case body 13, and the inside of the case body 3, that is, the case 2 having the main space M by the opening ends 4 and 14 and the subspace S by the protrusions 6 and 16, respectively. Configured (FIG. 2). The case main bodies 3 and 13 may be fitted using screws.

  The subspace S and the main space M are partitioned by a wall surface 7 extending downward from the case body 3 and a wall surface 17 extending upward from the case body 13. Semicircular openings 8 and 18 are respectively formed. The subspace S communicates with the main space M through the openings 8 and 18, and is gradually reduced in diameter as it is separated from the main space M when viewed from the wall surfaces 7 and 17.

  On the other hand, in the main space M, as shown in FIG. An electronic component as a functional member is mounted on the substrate 10, and the AC power is converted into DC power having a predetermined voltage in the component. Further, an AC input terminal (not shown) of the substrate 10 is electrically connected to the plug 30. This plug 30 has a pair of metal blades 31, 31, and is disposed on the lower case body 13 by insert molding.

On the other hand, a DC output terminal (not shown) of the substrate 10 is electrically connected to the cable 50, and the cable 50 is extended toward the outside of the case 2 via the subspace S.
This cable 50 has a cable main body 51, and a bush 54 is integrally formed by injection molding on the outside of the cable, in other words, on the jacket of the cable main body 51. The outer cover of the main body 51 and the bush 54 are made of a synthetic resin having flexibility.

More specifically, as shown in FIG. 3, first, the cable body 51 is configured to cover two core wires, and a groove is formed between the two core wires in the outer jacket. Yes.
Next, the bush 54 according to the present embodiment is formed from the sub space S to the outside of the case 2, and the bush 54 includes a boot portion 56, a hook portion 58, and an engaging portion 60. Yes.

  Specifically, the boot portion 56 is disposed so as to surround the cable main body 51 on the right side of the protruding portions 6 and 16 when viewed in FIGS. 2 and 3, and the outer diameter thereof is the protruding portions 6 and 16. The diameter is gradually reduced as the distance from the head increases. The boot portion 56 protects the main body 51 so that the cable main body 51 does not bend below the allowable bending diameter.

  The hook portion 58 is formed in a stepped shape surrounding the cable body 51, one end of the large diameter portion is connected to the boot portion 56, and the other end can be brought into contact with the end portions of the protruding portions 6 and 16. It is configured. Further, the small-diameter portion of the hook portion 58 has its both ends connected to the other end of the large-diameter portion and one end of the medium-diameter portion of the hook portion 58, and the outer peripheral surface thereof is the inner peripheral surface of the opening of the projecting portions 6 and 16. And prevents the ingress of moisture from the opening toward the main space M.

Further, the hook portion 58 has a medium diameter portion with one end abutting against the end portions of the projecting portions 6 and 16 in the subspace S and the other end connected to the engaging portion 60. The engaging portion 60 surrounds the cable main body 51 in the sub space S and extends toward the openings 8 and 18 and reaches the main space M by contacting the inner peripheral surfaces of the openings 8 and 18. ing.
Here, the protrusions 6 and 16 of the present embodiment are formed with claw-like members protruding from the inner peripheral surface of the subspace S toward the bush 54.

  Specifically, first, two case tapers (pressure surfaces) 9 and 9 are formed on the protruding portion 6 above the engaging portion 60 (FIGS. 2 and 4). The diameter gradually decreases as the distance from the main space M increases as viewed from the wall surface 7. On the other hand, two case tapers (pressure surfaces) 19 and 19 are formed on the protruding portion 16 below the engaging portion 60 (FIGS. 2 and 5). On the peripheral surface, the diameter gradually decreases with increasing distance from the main space M as viewed from the wall surface 17.

When viewed from the hook portion 58, the case tapers 9 and 19 of the present embodiment are composed of a total of four in the direction of 1 o'clock, 5 o'clock, 7 o'clock and 11 o'clock in terms of timepieces. As shown in FIG. 5, they are arranged slightly inclined toward the centers of the openings 8 and 18.
By the way, the above-described bush 54 includes a tightening spacer (saddle member) 70 and an O-ring (elastic member) 80 between the case tapers 9 and 19 and the openings 8 and 18.

  Specifically, the tightening spacer 70 of the present embodiment has a substantially annular shape, and is formed of a material that is more slippery than the case tapers 9 and 19 and the engaging portion 60, and the outer peripheral surface of the engaging portion 60. The inner peripheral surface 71 is provided to be engaged (FIGS. 6 and 7). In addition, the spacer 70 of the present embodiment is formed of a mold using a hard material capable of fastening the O-ring 80 to a desired position.

Further, the inner peripheral surface 71 is partitioned by a front end 73 and a rear end 75 when viewed in the extending direction of the cable 50. The front end 73 faces the wall surfaces 7 and 17, and the rear end 75 faces the hook portion 58.
Further, the outer side of the spacer 70 is partitioned by an outer peripheral surface 72, and the outer peripheral surface 72 faces the inner peripheral surfaces of the protrusions 6 and 16.

  Here, a rear taper (pressure receiving surface) 76 is formed between the outer peripheral surface 72 and the rear end 75. Specifically, the rear taper 76 is formed over the entire circumference of the spacer 70, and when viewed from the wall surfaces 7, 17, the angle and the size can contact the case taper 9, 19. As the distance from the main space M increases, the diameter gradually decreases.

On the other hand, a front taper (pressing surface) 74 is formed between the front end 73 and the inner peripheral surface 71.
Specifically, the front taper 74 is also formed over the entire circumference of the spacer 70, as with the rear taper 76, and when viewed from the wall surfaces 7, 17, the diameter gradually decreases as the distance from the main space M increases. The O-ring 80 can be received.

In the present embodiment, the angle formed by the front taper 74 and the axis of the bush 54 is formed smaller than the angle formed by the rear taper 76 and the axis of the bush 54.
For example, the angle of the front taper 74 is made smaller than 45 ° so that the O-ring 80 can easily tighten the engaging portion 60 as described later. On the other hand, if the angle of the rear taper 76 is made smaller than 45 °, the stroke amount of the spacer 70 can be gained, but in this embodiment, it is made larger than 45 ° to reduce the size of the subspace S. .

The O-ring 80 is disposed between the spacer 70 and the openings 8 and 18 and is formed in an annular shape that can be engaged with the outer peripheral surface of the engaging portion 60.
Then, when the cable body 51 described above is prepared and loaded into a mold for forming the bush 54, and molten resin is injected into the mold, a boot portion 56, a hook portion 58, and an engaging portion 60 are formed. The cable body 51 is surrounded.

Next, the upper case body 3 and the lower case body 13 having the blades 31 are separately formed of resin, and the power supply substrate 10 is attached to the case body 13 in which the resin is solidified.
Subsequently, the substrate 10 and the blade 31 are connected, and the substrate 10 and the cable body 51 are connected. Before that, a tightening spacer 70 and an O-ring 80 are prepared. 70 is passed through the cable body 51 from the side opposite to the boot portion 56 (FIG. 6). Specifically, the rear end 75 is moved to the hook portion 58 with the rear end 75 as the head, and the inner peripheral surface 71 is engaged with the engaging portion 60.

Thereafter, the O-ring 80 is also passed through the cable body 51 from the side opposite to the boot portion 56 and engaged with the engaging portion 60, and is arranged in the vicinity of the front taper 74.
Next, as shown in FIG. 8, the cable 50 having the spacer 70, the O-ring 80, and the like is disposed on the lower case body 13, and the upper case body 3 is covered from above the upper case body 3. The protrusions 6 and 16 are fitted to form the case 2.

  That is, the engagement portion 60, the O-ring 80, the spacer 70, and the hook portion 58 have a medium diameter portion on the inside of the protrusions 6 and 16, and a small diameter portion of the hook portion 58 on the opening portion of the protrusions 6 and 16. When the large-diameter portion of the portion 58 and the boot portion 56 are arranged outside the projecting portions 6 and 16, and the upper case body 3 is airtightly fitted to the lower case body 13 by ultrasonic welding, the case tapers 9 and 19 Contacts the rear taper 76, and normal contact normal force and tangential friction force are generated at these contacts as shown in FIG.

As a result, the spacer 70 moves toward the wall surfaces 7 and 17 along the substantially horizontal direction, that is, along the axial direction of the bush 54 by the resultant force of the normal force and the frictional force. 80 closely adheres to the periphery of the openings 8 and 18 and the wall surfaces 7 and 17.
Further, the O-ring 80 is pushed along the axial direction of the bush 54 and is also pushed toward the direction intersecting the axial line of the bush 54.

More specifically, the O-ring 80 is pushed by the front taper 74 in an oblique direction in which the engaging portion 60 is tightened as viewed in FIG.
In the adapter 1 having the case 2 described above, the plug 30 is directly connected to the outlet of the commercial power supply, while the connector (not shown) of the cable 50 is connected to an electrical device or the like. Thereby, in the adapter 1, alternating current power is converted into direct current power, and an electric device is driven and a secondary battery is charged.

  As described above, according to the present embodiment, the waterproof case 2 for electric appliances includes the case bodies 3 and 13, the cable 50, and the bush 54, and the case bodies 3 and 13 include the case tapers 9 and 19. Yes. Specifically, the case tapers 9 and 19 protrude toward the engaging portion 60 of the bush 54 on the inner peripheral surface of the sub space S, and the diameter gradually decreases as the distance from the main space M increases.

  On the other hand, the fastening spacer 70 and the O-ring 80 are engaged with the outer peripheral surface of the engaging portion 60. The spacer 70 has a rear taper 76 that gradually decreases in diameter as it moves away from the main space M and comes into contact with the case tapers 9 and 19. The case tapers 9 and 19 and the rear taper As the taper surfaces 76 come into contact with each other, they move toward the openings 8 and 18 along the axial direction of the bush 54. Further, the O-ring 80 is disposed between the spacer 70 and the openings 8 and 18, and comes into close contact with the peripheral edges of the openings 8 and 18 as the spacer 70 moves.

  As described above, the spacer 70 generates a force for pressing the O-ring 80 against the peripheral edges of the openings 8 and 18 by the wedge action between the tapered surfaces, and the wall surface on which the O-ring 80 forms the spacer 70 and the openings 8 and 18. Close the gap with 7,17. Therefore, it is possible to prevent moisture from entering the main space M from the peripheral edge of the openings 8 and 18 through the inner peripheral surface and the wall surfaces 7 and 17 of the subspace S. As a result, the waterproofness of the waterproof case 2 is further enhanced.

  In addition, according to this structure, an encapsulating resin material is not required as compared with the conventional case, and the number of parts required for the waterproof case 2 increases because the spacer 70 and the O-ring 80 are required, but the resin is solidified. Then, since it completes, without waiting for drying of encapsulating resin material, a man-hour becomes very short and the reduction of the manufacturing cost of case 2 can be achieved.

  The spacer 70 has a front taper 74 that can receive the O-ring 80 and gradually decreases in diameter as it is separated from the main space M. The front taper 74 is configured such that when the spacer 70 generates a force that presses the O-ring 80 against the peripheral edges of the openings 8 and 18 by the wedge action between the tapered surfaces, the O-ring 80 is directed toward the axis of the bush 54. The engaging portion 60 can be pushed out in the direction of narrowing the diameter.

As a result, the O-ring 80 also closes the gap between the spacer 70 and the engaging portion 60, travels through the gap between the outer peripheral surface of the engaging portion 60 and the inner peripheral surface 71 of the spacer 70, and passes from the peripheral edge of the openings 8 and 18 to the main space. Intrusion of moisture toward M can also be prevented.
Further, since the rear taper 76 is formed over the entire circumference of the spacer 70, the spacer is formed in a square shape, and is substantially circular as compared with the case where the rear taper is formed only at the upper and lower end portions. When attaching the annular spacer 70 to the engaging portion 60, it is not necessary to consider the arrangement of the rear taper 76.

  Furthermore, if the spacer 70 is made of a material that is more slidable than the case main bodies 3 and 13 and the bush 54, the spacer 70 moves smoothly when the case tapers 9 and 19 come into contact with the rear taper 76. Then, the O-ring 80 quickly comes into close contact with the peripheral edges of the openings 8 and 18. In addition, there is no concern about the generation of gas from the lubricant as compared with the case where the lubricant is applied to the case tapers 9, 19 and the rear taper 76 in order to move the spacer 70 smoothly.

  Further, if the case tapers 9 and 19 are provided on both the upper case body 3 and the lower case body 13, respectively, the wedge action between the tapered surfaces is caused by the fitting of the upper case body 3 and the lower case body 13. As a result, the O-ring 80 comes into close contact with the periphery of the openings 8 and 18 and is pushed out toward the axis of the bush 54. Thus, since the waterproof effect is obtained only by fitting the upper case body 3 and the lower case body 13, this point also contributes to shortening of the man-hours.

Furthermore, if two case tapers 9 and 19 are provided on both the upper case body 3 and the lower case body 13, an equal force can be applied to the rear taper 76.
Furthermore, the configuration of the case 2 described above has a particularly remarkable effect in the AC adapter 1 used in various environments that can come into contact with moisture.

The present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the claims.
For example, the spacer 70 of the above embodiment is formed in a substantially annular shape, but is not necessarily limited to this form, and a known shape along the shape of the subspace S can be adopted.

Further, the number of the case tapers 9 and 19 is not limited to the number of the above embodiments. For example, one case taper 9 is provided in a continuous shape from 11 o'clock to 1 o'clock of the watch as viewed from the hook portion 58, and one case taper 19 is also provided in a continuous shape from 5 o'clock to 7 o'clock in the watch. May be.
Furthermore, in the said Example, although the example embodied in AC adapter as an electric equipment is shown, as long as functional members, such as an electrical component and an electronic component, are built in a waterproof case, this invention is various electric equipment. Of course, it is also applicable.

That is, the cable is not necessarily limited to the power cable, and may be, for example, a communication electric cable or an optical cable. Further, the shape and the number of the blades described above are only examples, and may be a known shape such as a round bar shape or an L shape, or may be composed of three or more blades.
In any of these cases, similarly to the above, there is an effect that the waterproofness of the case is further enhanced.

It is a perspective view of the AC adapter in a present Example. It is a partial cross section side view of the adapter of FIG. FIG. 3 is a perspective view of a state in which an upper case body and the like are removed from the adapter of FIG. 2. FIG. 3 is a perspective view of the upper case body of FIG. 2. It is a perspective view of the lower case main body of FIG. It is a disassembled perspective view of the bush of FIG. It is explanatory drawing of the clamping spacer of FIG. It is explanatory drawing of the assembly | attachment of the upper case main body of FIG. 2, a cable, and a lower case main body. It is explanatory drawing of the force which acts on the spacer and O-ring of FIG.

Explanation of symbols

1 AC adapter 2 Waterproof case 3 Upper case body (case body)
6 Protruding part 8 Opening 9 Case taper (pressure surface)
13 Lower case body (case body)
16 Protruding part 18 Opening 19 Case taper (pressure surface)
50 Cable 54 Bush 60 Engagement part 70 Tightening spacer (saddle member)
74 Front taper (pressing surface)
76 Rear taper (pressure-receiving surface)
80 O-ring (elastic member)

Claims (6)

A main body for storing the functional member, and a case main body provided with a sub space communicating with the main space through the opening,
A cable connected to the functional member and extending toward the outside of the case body through the subspace;
A bush surrounding the cable and formed from the subspace to the outside;
The case body is
A pressure surface that protrudes toward the bush at the inner peripheral surface of the subspace and that is reduced in diameter as it is separated from the main space;
The bush
The bush is engaged with the outer peripheral surface of the bush, and has a pressure receiving surface that comes into contact with the pressure surface as it is separated from the main space. A scissors member that moves toward the opening along
An annular elastic member that is engaged with the outer peripheral surface of the bush between the flange member and the opening and that closely contacts the periphery of the opening as the flange member moves is provided. Waterproof case for electrical appliances. The waterproof case for an electric appliance according to claim 1,
The flange member is formed so that the elastic member can be received. The diameter of the flange member decreases as the elastic member moves away from the main space, and the elastic member is moved to the bush when the pressure surface and the pressure receiving surface come into contact with each other. A waterproof case for electric appliances, characterized by having a pressing surface that is pushed out toward the axis. A waterproof case for an electric appliance according to claim 1 or 2,
The waterproof case for electric appliances, wherein the flange member has a substantially annular shape, and the pressure receiving surface is formed over the entire circumference of the flange member. A waterproof case for an electric appliance according to any one of claims 1 to 3,
The waterproof case for electric appliances, wherein the flange member is formed of a material having a slipperiness superior to that of the case body. A waterproof case for an electric appliance according to any one of claims 1 to 4,
The case body is composed of an upper case body disposed on the upper side of the cable and a lower case body disposed on the lower side of the cable and fitted to the upper case body.
The waterproof case for electric appliances, wherein the pressing surface is provided on both the upper case body and the lower case body. A waterproof case for an electric appliance according to any one of claims 1 to 5,
The waterproof case for an electric appliance, characterized in that the waterproof case is used for an AC adapter that generates DC power from a commercial power source.

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