JP5087234B2 - Tabletop - Google Patents

Description

  The present invention relates to a table tap.

  Conventionally, a table tap for connecting a power cord of an electric device or the like arranged at a position away from an outlet to the outlet has been provided (for example, Patent Document 1).

The table tap of patent document 1 is provided with the housing | casing which consists of a cover and a body, The terminal plate which has a blade receptacle part in which the plug blade of the plug inserted from the plug blade insertion hole is inserted, and the said terminal plate The inside body that supports is housed.
JP 2004-221033 A

  In recent years, higher waterproofness may be desired for this type of table tap. In particular, with respect to the seal in the gap between the plug and the housing surface (around the plug blade insertion hole), a tracking phenomenon (a pair of plugs with dust or dirt accumulated in the gap between the plug and the housing surface) This is also important from the viewpoint of preventing the phenomenon of short circuit between the blades.

  Then, an object of this invention is to obtain the table tap which can improve a sealing performance more.

In the invention of claim 1, a unit body in which a box-shaped housing having an opening and a plug blade insertion hole into which a pair of plug blades of a plug are inserted on an exposed surface exposed from the opening A unit main body that passes through the inserted pair of plug blade insertion holes, and a blade receiving portion that is housed in the housing and into which the pair of plug blades that penetrate the plug blade insertion holes are inserted. In the table tap provided, a recess is formed on the back surface of the unit body facing the exposed surface, and the unit body is interposed between a peripheral edge of the opening and the unit body. The outer packing portion is integrally formed, and the outer packing portion surrounds the pair of plug blade insertion holes and is in close contact with a surface facing the unit main body of the plug having the plug blades inserted into the plug blade insertion holes. A peripheral wall and the pair of A construction part constructed between the mutually facing parts of the peripheral wall part so as to completely divide the exposed surface between the blade insertion holes and cut off the electrical connection between the pair of plug blades. The unit body has a back side packing integrally formed as one member continuous with the outer side packing portion, and a door provided on the back side of the back side packing and capable of closing the pair of plug blade insertion holes. parts and is provided, the back side packing, characterized by have a convex portion to be fitted into the recess.

  The invention according to claim 2 is characterized in that the erection portion is provided with a protruding wall portion that comes into close contact with the surface of the plug having the plug blade inserted into the plug blade insertion hole and facing the unit main body.

  The invention according to claim 3 is characterized in that an exposed surface between the pair of plug blade insertion holes is covered by the erection portion.

In the invention of claim 4, the casing is integrated in a posture in which the open side edges of the cover and the body are abutted with each other, and a sealing member is provided between the open side edges. Features.

  According to invention of Claim 1, the said peripheral wall part can improve the sealing performance in the clearance gap between the surface of a plug and a table tap (the peripheral part of the plug blade insertion hole of the exposed surface of a unit body). In addition, by providing the erection part that divides the exposed surface between the plug blade insertion holes, it is possible to suppress the occurrence of a short circuit through the exposed surface in the tracking phenomenon.

  According to the invention of claim 2, the sealing performance in the gap between the plug and the surface of the table tap (peripheral edge portion of the plug blade insertion hole on the exposed surface of the unit body) is further improved by the protruding wall portion provided in the installation portion. Can be improved.

  According to the invention of claim 3, it is possible to more reliably suppress the occurrence of a short circuit via the exposed surface in the tracking phenomenon.

According to invention of Claim 4 , the sealing performance in the boundary part of a cover and a body can be improved.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  (First Embodiment) FIG. 1 is a perspective view of a table tap according to this embodiment, and FIG. 2 is a sectional view taken along the line II-II in FIG.

  The housing 2 of the table tap 1 is composed of a long box-like body 10 whose upper surface is open, and a cover 11 having many upper openings of the body 10. For example, it can be configured as a resin molded product of a thermoplastic resin (vinyl chloride or the like).

  As shown in FIG. 2, a plurality of substantially rectangular openings 11a are formed in the upper wall portion of the body 10, and as shown in FIG. 1, a pair of plug blade insertion holes 3a, The unit main body 3 (the surface 12a of the unit body 12) including the unit body 12 on which 3b is formed is exposed.

  The unit body 12 is integrally formed with an outer packing 13 interposed between the peripheral portion of the opening 11a and the unit body 12, and the outer packing 13 allows the peripheral portion of the opening 11a and the unit body 12 to be The sealing performance in the gap is ensured.

  The outer packing 13 surrounds both the plug blade insertion holes 3a and 3b in a substantially rectangular shape, and has an annular peripheral wall portion 13b protruding in a mountain shape and the unit body 12 between the pair of plug blade insertion holes 3a and 3b. And an erected part 13c that is erected between the mutually opposing parts of the peripheral wall part 13b so as to divide the surface (exposed surface) 12a. In addition, 13a is a back side packing, and is integrally molded as one member continuous with the outer side packing 13 (the peripheral wall part 13b and the installation part 13c).

  The peripheral wall portion 13b protrudes in a mountain shape from the outer surface of the cover 11 and the surface 12a of the unit body 12, and has a plug (not shown) having a plug blade (not shown) inserted into the plug blade insertion holes 3a and 3b. In the gap between the facing surface and the exposed surface 12a of the unit body 12 (and the surface of the cover 11), water, dust, And the like function as a seal member that suppresses entry of the blades into the plug blade insertion holes 3a and 3b. The peripheral wall portion 13b also functions as a seal member between the inner surface of the opening 11a of the cover 11 and the outer surface of the unit body 3 (the outer surface of the upper end portion of the unit body 12).

  The outer packing 13 (back side packing 13a) is preferably formed of an elastomer having high tracking resistance. In the tracking phenomenon, initially, dust or dust accumulated in a gap between the plug and the surface of the table tap 1 between the pair of plug blades is dampened and short-circuited. However, the table tap 1 is short-circuited by dust or dust. When the surface of the plug is heated and carbonized, the carbonized portion is eventually short-circuited. Therefore, the material of the outer packing 13 is made of an elastomer having higher tracking resistance than that of the member (unit body 12 in the present embodiment) in which at least the plug blade insertion holes 3a and 3b are formed, that is, not easily carbonized even when heated. As a result, the effect of improving the sealing surface pressure by the elastic force (enhancement of sealing performance) can be obtained for the peripheral wall portion 13b, and the effect of suppressing the short circuit through the surface of the table tap 1 in tracking can be obtained for the installation portion 13c. Can do.

  The elastomer is generally heat-molded. Therefore, the unit body 12 that comes into contact with the outer packing 13 made of elastomer is made of a thermoplastic resin (for example, polycarbonate or the like) to improve the conformability when the outer packing 13 is integrally molded while heating, and the peripheral portion of the opening 11a. It is preferable to improve the sealing performance in the gap with the unit body 12.

  As shown in FIG. 2, the unit main body 3 includes a unit body 12, a door portion 4, a spring member 5, and an inner frame 6. The lower opening of the unit body 12 is closed by a middle frame 6 in which a through-hole that penetrates the plug blade is formed, and the door 4 is moved from the back side to the front side by a spring member 5 supported by the middle frame 6. It is energized towards. Here, it is preferable to add a lubricant to the back side packing 13a (outer side packing 13) to improve the slidability with the door portion 4.

  Further, the middle body 9 is accommodated in the recess of the body 10 of the housing 2, and a pair of terminal plates 20 a and 20 b are fixedly supported on the middle body 9. A pair of plug blades of the plug penetrate the unit body 3 and are inserted into blade receiving portions 21a and 21b formed on the pair of terminal plates 20a and 20b. The terminal plates 20a and 20b are connected to conductive wires inside the power cord 7 respectively. A packing 8 is provided at a portion where the power cord 7 is inserted into the table tap 1.

  According to the above embodiment, the sealing performance in the gap between the plug and the surface of the table tap 1 (exposed surface 12a of the unit body 12) can be ensured by the peripheral wall portion 13b of the outer packing 13. Further, by providing the erection portion 13c that divides the exposed surface 12a between the plug blade insertion holes, it is possible to suppress the occurrence of a short circuit through the exposed surface 12a in the tracking phenomenon.

  It should be noted that the outer packing 13 is added with an additive having a daylighting property to enhance visual discrimination in a dark place, or an additive having heat sensitivity (a color or the like changes depending on heat). Thus, it is preferable to present an undesired heat generation or the like for some reason.

  Moreover, in this embodiment, although the surrounding wall part 13b was formed in double, this may be single and may be multiplexed more than triple.

  (Second Embodiment) FIG. 3 is a partially enlarged perspective view showing a table tap according to this embodiment, and FIG. 4 is a sectional view taken along line IV-IV in FIG. The table tap 1A according to the present embodiment includes the same components as the table tap 1 according to the first embodiment. Therefore, common reference numerals are given to those similar components, and redundant description is omitted.

  In this embodiment, instead of the outer packing 13 of the first embodiment, an outer packing 23 in which protruding walls 23b are formed on both the peripheral wall portion 23d and the erection portion 23c is provided. The projecting wall 23b has a total of three, one surrounding one plug blade insertion hole 3a, one surrounding the other blade insertion hole 3b, and one surrounding both of the blade insertion holes 3a, 3b on the outer periphery thereof. One is provided. In such a configuration, each of the three projecting walls 23b causes water, dust, dust, or the like to enter the plug blade insertion holes 3a, 3b in the gap between the plug and the surface of the table tap 1A (exposed surface 12a of the unit body 3A). Since it functions as a sealing member that suppresses entry, the sealing performance is further improved.

  In the peripheral wall portion 23d, an annular projecting wall that surrounds both the plug blade insertion holes 3a and 3b is made single, and a projecting wall that constructs a portion of the projecting wall facing each other is placed on the construction portion 23c ( In the case of providing double), the sealing performance can be improved by the fact that a protruding wall is provided for each of the plug blade insertion holes 3a and 3b.

  (Third Embodiment) FIG. 5 is a partially enlarged perspective view showing a table tap according to this embodiment, and FIG. 6 is a sectional view taken along line VI-VI in FIG. The table tap 1B according to this embodiment includes the same components as the table taps 1 and 1A according to the above embodiment. Therefore, common reference numerals are given to those similar components, and redundant description is omitted.

  In this embodiment, it replaces with the said outer packings 13 and 23, and the outer packing 33 which has the cyclic | annular surrounding wall part 33b surrounding each plug blade insertion hole 3a, 3b is provided. In such a configuration, a portion of the annular peripheral wall portion 33b existing between the pair of plug blade insertion holes 3a and 3b functions as the installation portion 33c. In addition, 33d is a gate hole which communicates with the back side packing 33a.

  According to the present embodiment described above, each of the peripheral wall portions 33b allows water, dust, dust, etc. to enter the plug blade insertion holes 3a, 3b in the gap between the plug and the surface of the table tap 1B (exposed surface 12a of the unit body 3B). Since it functions as a sealing member that suppresses entry to the side, the sealing performance is further improved.

  In the present embodiment, the peripheral wall portion 33b is doubled, but this may be single or may be multiplexed more than triple.

  (Fourth Embodiment) FIG. 7 is a partially enlarged perspective view showing a table tap according to this embodiment, and FIG. 8 is a sectional view taken along the line VIII-VIII in FIG. The table tap 1C according to the present embodiment includes the same components as the table taps 1, 1A, 1B according to the embodiment. Therefore, common reference numerals are given to those similar components, and redundant description is omitted.

  In this embodiment, instead of the outer packings 13, 23, 33, an outer packing 43 having an annular peripheral wall portion 43b surrounding each plug blade insertion hole 3a, 3b is provided, and a pair of plug blade insertions are further provided. The exposed surface 12a of the unit body 12C between the holes 3a and 3b is covered with a bridge portion 43c.

  According to the above-described embodiment, each of the peripheral wall portions 43b has water, dust, dust, etc. inserted into the plug blade insertion holes 3a, 3b in the gap between the plug and the surface of the table tap 1C (exposed surface 12a of the unit body 3C). Since it functions as a sealing member that suppresses entry to the side, the sealing performance is further improved.

  Furthermore, according to the present embodiment, it is possible to more reliably suppress the occurrence of a short circuit through the exposed surface 12a in the tracking phenomenon.

  (Fifth Embodiment) FIG. 9 is a perspective view of a table tap according to this embodiment, and FIG. 10 is a sectional view taken along line XX of FIG. The table tap 1D according to the present embodiment includes the same components as the table tap 1 according to the first embodiment. Therefore, common reference numerals are given to those similar components, and redundant description is omitted.

  In this embodiment, instead of the outer packing 13 of the first embodiment, the outer packing (the peripheral wall portion 14b and the installation portion 14c) interposed between the peripheral portion of the opening 11a of the cover 11 and the unit body 3D. And a packing 14 that integrates the outer surface of the casing (body 10 and cover 11) (almost the entire area excluding the opening 11a and the connection opening of the packing 8). . The peripheral wall part 14b, the erection part 14c, and the back side packing 14a are exactly the same as those in the first embodiment.

  According to the present embodiment described above, by providing the coating layer 14d, it is possible to improve the sealing performance over the entire surface of the table tap 1D.

  (Sixth Embodiment) FIG. 11 is a perspective view of a table tap according to this embodiment, and FIG. 10 is an exploded perspective view of some of the components of the table tap. The table tap 1E according to the present embodiment includes the same components as the table tap 1 according to the first embodiment. Therefore, common reference numerals are given to those similar components, and redundant description is omitted.

  In the present embodiment, the cover 11E that forms the housing 2E and the open side edges 11b and 10b of the body 10E extend along the two open side edges 11b and 10b, and the covers 11E and the body 10E A seal member 15 having a predetermined width is narrowed along the outer surface. The seal member 15 is preferably formed of a relatively hard material (for example, ABS resin), and suitably formed with irregularities on the outer surface thereof to improve ease of holding.

  According to the present embodiment, the sealing performance at the boundary between the cover 11E and the body 10E can be improved by the sealing member 15. In addition, the structure concerning this embodiment can be implemented in combination with said each embodiment.

  The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various modifications can be made.

The perspective view of the table tap concerning 1st Embodiment of this invention. II-II sectional drawing of FIG. The perspective view which expands and shows partially the table tap concerning 2nd Embodiment of this invention. IV-IV sectional drawing of FIG. The perspective view which expands and partially shows the table tap concerning 3rd Embodiment of this invention. VI-VI sectional drawing of FIG. The perspective view which expands partially and shows the table tap concerning 4th Embodiment of this invention. . VIII-VIII sectional drawing of FIG. The perspective view of the table tap concerning 5th Embodiment of this invention. XX sectional drawing of FIG. The perspective view of the table tap concerning 6th Embodiment of this invention. The disassembled perspective view of a part of component of the table tap concerning 6th Embodiment of this invention.

Explanation of symbols

1, 1A, 1B, 1C, 1D, 1E Table tap 2, 2E Case 3, 3A, 3B, 3C, 3D Unit body 3a, 3b Plug blade insertion hole 10b, 11b Open side edge 10, 10E Body 11, 11E Cover 11a Opening 12, 12C Unit body 12a Exposed surface 13, 23, 33, 43 Outer packing (outer packing)
13b, 14b, 23d, 33b, 43b Peripheral wall part 13c, 14c, 23c, 33c, 43c Construction part 14d Cover layer 15 Seal member 21a, 21b Blade receiving part 23b Protruding wall (protruding wall part)

Claims (4)

A box-shaped housing having an opening;
A unit body having a plug blade insertion hole into which a pair of plug blades of a plug is inserted on an exposed surface exposed from the opening, and a unit main body penetrating the inserted pair of plug blade insertion holes;
A blade receiving portion that is housed in the housing and into which the pair of plug blades penetrating the plug blade insertion hole is inserted;
In the table tap with
A concave portion is formed on the back surface of the unit body facing the exposed surface,
The unit main body is integrally molded with an outer packing portion interposed between the peripheral portion of the opening and the unit main body,
The outer packing portion surrounds the pair of plug blade insertion holes and is in close contact with a surface facing the unit body of a plug having a plug blade inserted into the plug blade insertion hole; and the pair of plug blades An erection part constructed between the mutually opposed parts of the peripheral wall part so as to completely divide the exposed surface between the insertion holes and interrupt electrical connection between the pair of plug blades. ,
On the back side of the unit body, a back side packing integrally formed as one member continuous with the erection part, a back side of the back side packing is slidably provided, and a pair of plug blade insertion holes can be closed. A door is provided,
The backside packing, strip, characterized in that have a protrusion that fits into said recess.   2. The table tap according to claim 1, wherein a protruding wall portion that is in close contact with a surface facing a unit main body of a plug having a plug blade inserted into the plug blade insertion hole is provided in the installation portion.   The table tap according to claim 1 or 2, wherein an exposed surface between the pair of plug blade insertion holes is covered by the erection portion.   The said housing | casing is integrated with the attitude | position which faced | matched the open side edges of a cover and a body, The sealing member was narrowly enclosed between these open side edges, The inside of Claims 1-3 characterized by the above-mentioned. Table tap as described in any one.

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