JP2007087790A - Waterproof structure of switch device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a waterproof structure of a switch device allowing waterproof packing to be efficiently and rapidly mounted by easily detecting reverse mounting of the waterproof packing when it is reversely mounted and by allowing the waterproof packing to be corrected. <P>SOLUTION: Overhanging parts 22 are formed in marginal parts of waterproof packing 20 by deflecting them to either side from the position of a rocking center line Cl of an operation part 11, projecting parts 30 are formed on the back face of a housing in a periphery of a mounting opening 2Ab, and the overhanging parts 22 and the projecting parts 30 interfer with each other when the waterproof packing 20 is attached in an attitude reverse to the normal attitude with respect to the rocking center line Cl. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a waterproof structure for a switch device provided in an electrical apparatus.

  Conventionally, a table tap with a plurality of outlets is provided with a switch for switching on and off, and when the switch is turned off, electricity supplied from the power supply is blocked from being supplied to each outlet. Is known (see, for example, Patent Document 1).

By providing a switch on the table tap in this way, it is possible to manage the power supply to each outlet in a lump.For this reason, for example, when going out, the standby power consumption of the electrical equipment can be consumed without removing the plug from each outlet. There are various advantages such as prevention.
Japanese Utility Model Publication No. 61-126581 (first page, FIG. 1)

  In such a conventional table tap with a switch, in order to ensure dust proofing and waterproofing at the part where the switch is mounted, the operation part of the switch is covered with waterproof packing, and the peripheral part of the waterproof packing is connected to the housing of the table tap. Some are installed with a seal secured between them.

  In such a structure, the visibility and identification of the operation unit surface will be reduced by covering the switch operation unit with waterproof packing, so the on / off direction is identified on the waterproof packing to prevent on / off misoperation. For example, it is preferable to provide a display portion for example, such as a convex portion indicating the ON direction.

  However, in the structure where the waterproof packing is provided with a display unit, even if the switch itself is assembled in the correct posture, if the waterproof packing is mistakenly installed in the posture in which on / off is reversed, The off operation is reversed and the normal switch function cannot be achieved.

  For this reason, in order to prevent reverse assembly of the waterproof packing, it is necessary to pay close attention in the assembly process, and there is a problem that productivity is inevitably lowered accordingly.

  Therefore, an object of the present invention is to obtain a waterproof structure of a switch device that can more reliably suppress erroneous assembly of the waterproof packing.

  According to the first aspect of the present invention, the housing includes an operating portion and a switch case that supports the central portion of the operating portion so as to be swingable, and is turned on / off in response to a swinging operation of the operating portion. A switch provided in a state where the operation portion is exposed to the surface side from the mounting opening formed in the cover, and a portion exposed from the mounting opening of the operation portion, and a peripheral portion thereof covering the switch case and the mounting A flexible waterproof packing sandwiched between the housing periphery of the opening periphery of the opening, and a protruding portion that is biased to one of the periphery of the waterproof packing from the position of the swing center line of the operation portion On the other hand, when the protrusion is provided on the rear surface of the housing at the periphery of the mounting opening, and the waterproof packing is assembled in a posture opposite to a normal posture with respect to the swing center line, Above And a part is characterized in that so as to interfere with each other.

  In the invention of claim 2, when the thickness of the overhang portion is increased and the waterproof packing is assembled in the reverse posture, the overhang portion and the protrusion portion overlap each other on the rear surface of the housing. The overhanging portion and the structure in the housing interfere with each other.

  The invention according to claim 3 is characterized in that the periphery of the waterproof packing is formed in a substantially rectangular shape, and the overhanging portion is provided so as to be separated from the corner portion of the substantially rectangular shape.

  In the invention of claim 4, when the waterproof packing is assembled in the regular posture, the projecting portion and the protruding portion are point-symmetric with respect to the center of the mounting opening. It is characterized by comprising.

  In the invention of claim 5, a fitting hole is formed in the overhanging portion, and the fitting hole is closely fitted in a portion corresponding to the fitting hole on the rear surface of the housing at the periphery of the mounting opening. A fitting projection to be fitted is provided.

  The invention according to claim 6 is characterized in that annular concavo-convex portions that are closely fitted to each other are provided on both the peripheral edge portion of the waterproof packing and the housing rear surface of the peripheral edge of the mounting opening.

  The invention according to claim 7 is characterized in that, in the annular concavo-convex portion, the annular convex inner peripheral side provided at the peripheral portion of the waterproof packing is a sealing surface.

  The invention according to claim 8 is characterized in that the waterproof packing can be temporarily held by being fitted into the mounting opening.

  In the invention of claim 9, the vertical wall portion provided in the waterproof packing is fitted to the opening wall surface of the mounting opening, and the vertical wall portion and the operation portion are arranged at the upper end of the vertical wall portion. The covering wall portion to be covered is connected in a bent state, and the gap between the covering wall portion and the operation portion is gradually reduced toward the top of the operation portion.

  The invention according to claim 10 is characterized in that the waterproof packing is formed with a pair of flat portions in a portion corresponding to the operation surface of the operation portion and a groove portion separating the flat portions. To do.

  In the invention of claim 11, a plurality of annular projections surrounding the mounting opening are provided at a portion where the peripheral edge of the waterproof packing is pressed against the rear surface of the housing at the periphery of the mounting opening. Features.

  According to the first aspect of the present invention, when the waterproof packing is assembled in the reverse posture, the overhanging portion and the protruding portion interfere with each other, so that it is easy to make an incorrect assembly (reverse assembly) during the assembly. And can be easily and quickly corrected to the correct assembly posture.

  According to the second aspect of the present invention, it is possible to identify erroneous assembly (reverse assembly) even when the overhanging portion interferes with the structure in the housing. Can be suppressed.

  In addition, even if the waterproof packing is formed of a relatively flexible material, the overhanging portion is prevented from being crushed when it interferes with the structure in the housing, because the overhanging portion has a thickness. Thus, there is an advantage that the discriminability of misassembly can be improved.

  According to the invention of claim 3, since the overhanging portion is provided at a position where the rigidity is lower than the corner portion of the substantially rectangular peripheral edge portion, the rigidity is reduced compared to the case where the overhanging portion is provided at the corner portion. The protruding portion can be easily tilted toward the center of the mounting opening, and the overhanging portion and the structure inside the housing can be more reliably interfered with each other, thereby improving the misidentification.

  According to the invention of claim 4, by arranging at least one pair of the overhang portion and the projection portion in a point symmetry, the overhang portion and the projection portion can be caused to interfere when assembled in the opposite posture. it can.

  According to the invention of claim 5, the overhanging portion can be used as a means for holding the waterproof packing in the housing or temporarily temporarily holding it in a properly mounted state.

  According to invention of Claim 6, waterproofing property can further be improved by the said cyclic | annular uneven | corrugated | grooved part.

  According to the seventh aspect of the present invention, the reliability of the seal can be increased by the amount of sealing on the side closer to the mounting opening.

  According to the eighth aspect of the present invention, the attachment work can be performed more easily and more quickly by temporary holding.

  According to the invention of claim 9, by bending the upper end of the vertical wall portion, the waterproof packing can be bent more easily and more reliably by the pressing operation, and the operability can be improved. By gradually reducing the gap between the covering wall and the operation part as it goes to the top of the part, it is possible to suppress the waterproof packing from being caught by the operation part and to reduce the gap between the top of the operation part and the waterproof packing. The operational feeling can be improved.

  According to invention of Claim 10, the visibility of an operation part can be improved and an erroneous operation can be suppressed.

  According to the invention of claim 11, the sealing performance can be improved by the plurality of annular protrusions.

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

  (First Embodiment) FIGS. 1 to 12 show a first embodiment of a waterproof structure of a switch device according to the present invention. FIG. 1 is a perspective view of a table tap, and FIG. 2 is an exploded perspective view of the table tap. 3 is an enlarged cross-sectional view taken along line AA in FIG. 1, FIG. 4 is a bottom perspective view of the waterproof packing, and FIG. 5 is a plan view of (a) and a side view of (b). It is explanatory drawing shown with the front view of a figure and (c), and the bottom view of (d).

  FIG. 6 is a bottom view showing a normal assembly state of the waterproof packing, FIG. 7 is a cross-sectional view taken along line BB in FIG. 6, and FIG. 8 is an inside of a switch mounting opening formed in the housing. 9 is a bottom view showing the reversely assembled state of the waterproof packing, FIG. 10 is a sectional view taken along the line CC in FIG. 9, and FIG. 11 is an enlarged sectional view of a portion D in FIG. 12 is an enlarged cross-sectional view of a portion E in FIG.

  As shown in FIGS. 1 and 2, the waterproof structure of the switch device according to the present embodiment will be described by way of example when applied to a table tap 1 as an electric device. The upper part in the figure is the upper member and the upper position, the lower part in the figure is the lower member and the lower position, and the left and right direction left and right positions in the figure, but in particular the positional relationship between the upper and lower and the left and right It does not specify.

  As shown in FIG. 1, the table tap 1 includes a housing 2 formed into a hollow having a substantially rectangular cross section by an outer cover 2 </ b> A and an outer body 2 </ b> B, and a plug blade of an unillustrated plug on the upper surface 2 c of the housing 2. A plurality (two in the present embodiment) of insertion units 3 are provided at appropriate intervals in the length direction of the housing 2, and one plug blade insertion unit 3 is also provided on the distal end surface 2 d of the housing 2.

  Further, a switch 10 for on / off switching is provided on the base end side (the other side in FIG. 2) of the upper surface 2c of the housing 2, and electricity supplied from the power cord 4 by switching of the switch 10 is The plug blade insertion unit 3 is energized and cut off.

  Here, in this embodiment, the switch 10 is provided as a waterproof switch provided with the waterproof packing 20.

  As shown in FIG. 2, the detailed internal structure of the table tap 1 includes an intermediate body 5, a blade receiver 6, and a plug blade insert between an outer cover 2A and an outer body 2B which are divided into upper and lower parts. A waterproof bushing 7 is attached to a portion in which the unit 3 and the switch 10 are built and the power cord 4 is inserted into the housing 2.

  The outer cover 2A is formed in a substantially inverted U-shape with a shallow section with the lower part opened, and an opening 2Aa is formed on the upper surface 2c so that the plug blade insertion port 3a of the plug blade insertion unit 3 faces upward. At the same time, a mounting opening 2Ab is formed in which the switch 10 is fitted and attached. Further, a U-shaped notch 2Ac that faces the plug blade insertion port 3a of the plug blade insertion unit 3 is also formed on the distal end surface 2d of the outer cover 2A.

  The outer body 2B is formed in a shallow U-shaped shallow section with its upper part opened, and a screw mounting hole 2Ba is formed through which a plurality of assembly screws 8 (three in this embodiment) are inserted in the length direction. The outer cover 2A and the outer body 2B are coupled to each other through an assembly screw 8 inserted through the screw mounting hole 2Ba. Further, a notch 2Bd that forms a rectangular opening together with the notch 2Ac of the outer cover 2A is formed on the distal end surface 2d of the outer body 2B.

  Further, a plurality of ribs 2Bb cut out along the outer shape of the side wall 5a and the bottom surface 5b of the middle body 5 are provided on the inner side of the outer body 2B so as to project the middle body 5 stably by the ribs 2Bb. Fits and supports. A plurality of ribs for fitting and supporting the middle body 5 are also provided inside the outer cover 2A.

  Further, a notch 2Bc for taking in the power cord 4 (notch of the outer cover 2A is hidden) is formed between the outer end wall of the outer cover 2A and the outer body 2B, and the notch 2Bc The flange portion 7a of the waterproof bushing 7 through which the power cord 4 is inserted is fitted and locked.

  That is, the flange portion 7a is formed on the base portion (front side in FIG. 2) of the waterproof bushing 7 formed in a cylindrical shape, and the outer shape thereof is substantially rectangular, and the groove portion 7b formed on the outer periphery of the flange portion 7a. Is fitted into the peripheral edge of the notch 2Bc. At this time, the notch of the outer cover 2A and the notch 2Bc of the outer body 2B are combined to form a rectangular opening along the outer shape of the flange 7a.

  In addition, a rib 2Bb for separating the two cords 4a and 4b of the power cord 4 is provided in the vicinity of the center portion of the notch 2Bc so as to protrude on the inner side of the base end side of the outer cover 2A and the outer body 2B. It is the same).

  The middle body 5 is a case for holding the blade receiver 6 and is formed in a U-shaped cross section with its upper portion and front end (front side in the figure) released, and a plurality of inner bodies 5 for fitting and holding the blade receiver 6 therein. 5c, and an opening 5d through which the assembly screw 8 is inserted is formed at the center of the bottom surface 5b.

  The blade receiver 6 includes two conductive band plates 6a and 6b arranged in the width direction (left and right direction) of the housing 2, and plug blades of plugs are provided at intermediate portions of the conductive band plates 6a and 6b. Two blade receiving springs 6c sandwiched with elastic force are provided at predetermined intervals, and one similar blade receiving spring 6c is provided at each tip portion (front side in FIG. 2) of the conductive strips 6a and 6b. .

  And each blade receiving spring 6c is arrange | positioned at the plug blade insertion port 3a provided in the plug blade insertion unit 3 at two places, respectively. Each plug blade insertion unit 3 has a waterproof structure in which a waterproof door (not shown) can be freely opened and closed at each plug blade insertion port 3a.

  Further, the base end portions (the other side in FIG. 2) of the conductive strips 6 a and 6 b are connection end portions 6 d and 6 e connected to the switch 10.

  The switch 10 includes an operation unit 11 that is operated to swing, and a switch case 12 that supports the central part of the operation unit 11 so as to be swingable. The switch 10 is turned on and off by a swing operation of the operation unit 11. It constitutes a tumbler switch, and is mounted with the operation portion 11 facing outward from the mounting opening 2Ab of the housing 2.

  The switch 10 includes two input terminals (not shown) to which the two cords 4a and 4b of the power cord 4 are connected to the other side in FIG. 2, and two output terminals 13a and 13b protruding to the front side in FIG. And the operation unit 11 is turned on, that is, the side on which the projection 11a is provided is pushed downward as shown in FIG. 2 to energize the output terminals 13a and 13b with electricity supplied from the power cord 4. On the other hand, the operation unit 11 is turned off, that is, the side opposite to the side where the projection 11a is provided is pressed downward to cut off the electricity supplied from the power cord 4 so that the output terminals 13a and 13b are not energized. It has become.

  The output terminals 13a and 13b are connected to the corresponding connection ends 6d and 6e of the blade receiver 6, respectively. When the switch 10 is turned on, each plug blade insertion unit 3 is energized, while the switch 10 is turned off. Each plug blade insertion unit 3 is in a non-energized state.

  The waterproof packing 20 is formed of a material that is flexible and stretchable, such as rubber or soft synthetic resin, and has a rectangular shape in which the peripheral edge portion 20a substantially follows the shape of the upper end portion of the switch case 12, as shown in FIG. In the center portion, a covering portion 21 having a shape covering the outside of the operation portion 11 is formed to bulge.

  The waterproof packing 20 is attached in a state where the operation portion 11 is covered with the covering portion 21, and the covering portion 21 and the operation portion 11 are fitted into the mounting opening 2 </ b> Ab from below in FIG. 2 of the outer cover 2 </ b> A. The peripheral edge portion 20a is sandwiched between the upper end of the switch case 12 and the inner peripheral edge portion (the rear surface of the housing) of the mounting opening 2Ab.

  Then, by pressing the cover portion 21 of the waterproof packing 20 from the outside, the operation portion 11 can be swung while the cover portion 21 is deformed. A similar projection 21a is projected at a position corresponding to the projection 11a of the eleventh, and the operation portion 11 can be turned on by pressing the formation side of the projection 21a.

  As shown in FIG. 2, the table tap 1 configured as described above is assembled in a state in which the middle body 5 holding the blade receiver 6 is set on the outer body 2 </ b> B and the waterproof packing 20 is put on the operation unit 11. The switch 10 is set, and the plug blade insertion units 3 corresponding to the respective blade receiving springs 6c of the blade receiving 6 are arranged, and the outer cover 2A is covered from above them, and the outer body 2B is covered by the assembly screws 8 And the outer cover 2A.

  Then, as shown in FIG. 3, the switch 10 is fixed while being sandwiched between the outer cover 2 </ b> A and the outer body 2 </ b> B, and the peripheral edge 20 a of the waterproof packing 20 is connected to the upper end of the switch case 12 and the mounting opening. The waterproof packing 20 is fixed by being sandwiched between the inner periphery of the portion 2Ab (the rear surface of the housing) in a crimped state.

  Of course, the power cord 4 is connected to the switch 10 and is set between the base end portions of the outer cover 2A and the outer body 2B together with the waterproof bushing 7 inserted therethrough.

  Here, in this embodiment, as shown also in FIGS. 4 to 7, any one of the peripheral part 20 a of the waterproof packing 20 from the position of the swing center line Cl (see FIG. 6) of the operation part 11, In the present embodiment, the overhanging portion 22 is provided so as to be biased toward the off operation side (see FIG. 2), and the overhanging portion 22 with respect to the swing center line Cl of the operation portion 11 is provided inside the peripheral edge of the mounting opening 2Ab. The protrusion 30 is provided in the site | part Pm which becomes line symmetrical.

  As shown in FIG. 8, the protrusion 30 is formed in a substantially T shape by a vertical wall 30a parallel to the side of the mounting opening 2Ab and a horizontal wall 30b perpendicular to the vertical wall 30a. The

  At this time, in this embodiment, as shown in FIG. 6, the inside of the housing 2, particularly the inside of the outer cover 2 </ b> A to which the waterproof packing 20 is attached, has a predetermined width W. (The left-right direction) is effectively disposed so as to be substantially full (W) of the housing 2, and the overhanging portion 22 is a peripheral portion 20 a of the waterproof packing 20 and both sides 20 s 1, 20 s 2 perpendicular to the swing center line Cl of the operation portion 11. Are provided to face each other.

  Further, as shown in FIGS. 9 and 10, the overhanging portion 22 is formed with a thickness in a direction perpendicular to the back surface of the housing, and when the waterproof packing 20 is assembled in the opposite posture, the overhanging portion 22 is formed. And the protruding portion 30 are overlapped on the back surface of the housing 2 and assembled in a state where the protruding portion 22 and the protruding portion 30 interfere with each other, that is, the outer cover 2A and the outer body 2B are connected via the assembly screws 8. When joined, the overhanging portion 22 is deformed in the falling direction (arrow K in FIG. 10) and formed to have a thickness T and a height H necessary for interfering with components that are the internal structure of the table tap 1. is there.

  Here, the overhanging portion 22 is provided so as to be separated from the corner portion of the peripheral edge portion 20a of the waterproof packing 20 formed in a substantially rectangular shape, and has the flexibility necessary to fall down when it interferes with the internal structure. It can be secured. If it is provided at the corner portion of the peripheral edge portion 20a, the rigidity is increased, and the amount of collapse toward the center of the mounting opening 2Ab is insufficient, so that a sufficient interference state may not be obtained.

  Furthermore, in this embodiment, as shown in FIG. 7 and FIG. 11, an annular unevenness that fits closely to both the peripheral edge portion 20 a of the waterproof packing 20 and the peripheral edge inner side (housing back surface) of the mounting opening 2 Ab. A portion 31 is formed.

  As shown in FIG. 11, the annular concavo-convex portion 31 protrudes along the concave portion 32 from the concave portion 32 formed on the peripheral portion of the mounting opening 2 </ b> Ab and the peripheral portion 20 a of the waterproof packing 20. Convex portion (convex ridge) 23, and the convex portion 23 is closely fitted in the concave portion 32.

  Moreover, in this embodiment, as shown in FIGS. 3 and 5, the waterproof packing 20 has a portion corresponding to the operation surface of the operation unit 11 of the switch 10, that is, the upper surface of the covering unit 21, and the swing center of the operation unit 11. A pair of plane portions 24 and 24a are provided at both ends with the line Cl as a boundary, and a groove portion 25 that separates the plane portions 24 and 24a is recessed.

  The pair of flat portions 24, 24a are formed in a substantially straight line with their upper surfaces being not inclined with respect to each other, and the groove portion 25 is recessed inward with an arcuate curved surface.

  Further, as shown in FIG. 3, an interference portion 26 is provided in a portion where the waterproof packing 20 is fitted into the mounting opening 2Ab.

  That is, in the waterproof packing 20, the periphery of the base end portion of the covering portion 21 is fitted into the mounting opening 2Ab, but in this embodiment, the inner peripheral surface of the mounting opening 2Ab is viewed from the inside as shown in FIG. While the base portion of the covering portion 21 is inclined to be slightly narrower toward the outside, at least a portion fitted to the mounting opening 2Ab is a vertical wall (vertical wall portion) 21b, and the vertical wall By bringing 21b into contact with the inner peripheral surface of the mounting opening 2Ab, the interference portion 26 is disposed on the outer portion of the mounting opening 2Ab.

  In the present embodiment, as shown in FIG. 12, the covering portion 21 of the waterproof packing 20 is operated by pressing the covering portion 21 by reducing the gap δ1 between the both end corners of the operating portion 11. The operation feeling when switching the portion 11 on and off is improved, and the clearance δ2 between the both side portions of the covering portion 21 and the both side portions of the operation portion 11 is increased so that the operation portion 11 is swung. It is possible to prevent rubbing when it is done.

  That is, the vertical wall (vertical wall portion) 21b provided in the waterproof packing 20 is fitted to the opening wall surface of the mounting opening 2Ab, and the upper end of the vertical wall 21b covers the vertical wall 21b and the operation portion 11. The wall portion 27 is connected in a bent state, and the gaps (δ1, δ2) between the covering wall portion 27 and the operation portion 11 are gradually reduced toward the top side (plane portion 24a side) of the operation portion 11. (Δ2> δ1).

  With the above structure, according to the waterproof structure of the switch 10 according to the present embodiment, the protruding portion 22 is provided on the peripheral edge portion 20a of the waterproof packing 20 so as to be offset from the position of the swing center line Cl of the operation portion 11 to the off operation side. On the other hand, when the protrusion 30 is provided on the rear surface of the housing at the periphery of the mounting opening 2Ab and the waterproof packing 20 is assembled in a posture opposite to the normal posture with respect to the swing center line Cl, the protruding portion 22 and the protrusion 9 and 10, as shown in FIGS. 9 and 10, the waterproof packing 20 is reversely assembled, that is, the on operation side provided with the protrusion 21a and the opposite off operation side are reversed. In this case, the overhanging portion 22 interferes with the protruding portion 30, and the waterproof packing 20 sinks into the mounting opening 2Ab and cannot be assembled at the normal position.

  For this reason, even when the waterproof packing 20 is quickly assembled and reversely assembled, the reverse assembly can be immediately recognized and reassembled into a normal state as shown in FIG. Good and quick assembly is possible and productivity can be improved.

  Moreover, since the overhang | projection part 22 functions also as a knob at the time of attaching the waterproof packing 20, the assembly workability | operativity of the waterproof packing 20 improves, and it can improve productivity also by this.

  Furthermore, in this embodiment, when the overhanging portion 22 is formed with a thickness and the waterproof packing 20 is assembled in the opposite posture, the overhanging portion 22 and the protruding portion 30 overlap each other on the rear surface of the housing. Since the overhanging portion 22 interferes with the structure in the housing, even when the waterproof packing 20 is formed of a flexible and relatively soft material, it interferes with the structure in the housing 2. There is an advantage that the overhanging portion 22 can be prevented from being crushed and the misidentification can be improved.

  In short, when the thickness T of the overhanging portion 22 and the height H of the protruding portion 30 are assembled in a state where the overhanging portion 22 and the protruding portion 30 interfere with each other by reverse assembly of the waterproof packing 20, the overhanging portion Since 22 is deformed in the falling-down direction and interferes with the internal components of the table tap 1, the assembling resistance of the waterproof packing 20 is increased and the reverse assembling can be detected more reliably.

  Furthermore, in the present embodiment, the periphery of the waterproof packing 20 is formed in a substantially rectangular shape, and the overhanging portion 22 is provided so as to be separated from the corner portion of the substantially rectangular shape. Compared to the case where the overhanging portion 22 is provided in the mounting opening 2Ab, the overhanging portion 22 is more likely to fall down, and the overhanging portion 22 and the structure in the housing 2 are more reliably interfered with each other. Discriminability can be improved.

  In addition, since the annular concavo-convex portion 31 that closely fits to each other is formed on both the peripheral portion 20a of the waterproof packing 20 and the peripheral portion inside (back surface of the housing) of the mounting opening 2Ab, the annular concavo-convex portion 31 allows the waterproof packing The sealing performance between the peripheral edge portion 20a of the 20 and the peripheral edge portion of the mounting opening 2Ab can be improved, and the waterproof packing is obtained by partially fitting the annular uneven portion 31 when the waterproof packing 20 is assembled. Since 20 can be temporarily held, the assembly workability of the waterproof packing 20 can be improved.

  Further, since the waterproof packing 20 is provided with a pair of flat portions 24 and 24a at both ends of the portion corresponding to the operation surface of the operation portion 11, and the groove portion 25 is provided between the flat portions 24 and 24a, the waterproof packing 20 is provided. Since the on / off operation portions are flat portions 24 and 24a provided at both ends with the groove 25 as a boundary, the portion to be pressed at the time of operation becomes clear and the on / off operation becomes easy.

  Furthermore, since the interference portion 26 is provided in the portion where the waterproof packing 20 is fitted into the mounting opening 2Ab, the waterproof packing is formed by the interference portion 26 when the waterproof packing 20 is fitted into the mounting opening 2Ab. Since 20 can be temporarily held, the assembling workability of the waterproof packing 20 can be further improved.

  In addition, the vertical wall (vertical wall portion) 21b provided in the waterproof packing 20 is fitted to the opening wall surface of the mounting opening 2Ab, and the upper wall of the vertical wall 21b covers the vertical wall 21b and the operation portion 11. The wall portion 27 is connected in a bent state, and the gaps (δ1, δ2) between the covering wall portion 27 and the operation portion 11 are gradually reduced toward the top side (plane portion 24a side) of the operation portion 11. Accordingly, the waterproof packing 20 can be bent more easily and more reliably by the pressing operation as much as the bent portion is provided, and the operability can be improved. By gradually reducing the gap between the operating portion 11 and the operation portion 11, the waterproof packing 20 is prevented from being caught by the operation portion, and the clearance between the top of the operation portion 11 and the waterproof packing 20 can be reduced to improve the operational feeling. Can be up.

  (Second Embodiment) FIG. 13 shows a second embodiment of the present invention. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted. Moreover, FIG. 13 is explanatory drawing which shows waterproof packing with the top view of (a), the side view of (b), and the front view of (c).

  The waterproof structure of the switch device of this embodiment is basically the same as that of the first embodiment. As shown in FIG. 13, the waterproof packing 20 has a covering portion 21 that covers the outside of the operation portion 11 at the center. In addition to the bulge formation, the bulging portion 22 is provided on the peripheral edge portion 20a. In particular, in the present embodiment, the bulging portion 22 is formed on both sides 20s1 perpendicular to the swinging center line Cl of the operation portion 11 at the peripheral edge portion 20a. , 20s2 is provided on one side 20s1.

  Further, when the overhanging portion 22 is provided on one side 20s1 in this way, the protrusion 30 provided on the inner side of the peripheral edge of the mounting opening 2Ab of the outer cover 2A is attached to the operation portion 11 in a normal posture. It is provided at a portion Pn that is point-symmetric with the overhanging portion 22 with respect to the swing center point Cp.

  Therefore, according to the present embodiment, the overhanging portion 22 is provided on one side 20s1 of the sides 20s1 and 20s2 that are perpendicular to the swinging center line Cl of the operation unit 11 at the peripheral edge 20a of the waterproof packing 20. However, even in this case, since the protrusion 30 is provided in the portion Pn that is point-symmetric with the overhanging portion 22 with respect to the swing center point Cp of the operation portion 11, when the waterproof packing 20 is reversely assembled, The overhanging portion 22 can interfere with the protruding portion 30 and detect reverse assembly.

  Moreover, in this embodiment, since the number of the overhang | projection parts 22 and the protrusion parts 30 can be restrained to the required minimum, the structure of the formwork for shape | molding the waterproof packing 20 and the outer cover 2A of the housing 2 is simplified. be able to.

  (Third Embodiment) FIGS. 14 to 17 show a third embodiment of the present invention. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted. 14 is a bottom view showing a regular assembly state of the waterproof packing, FIG. 15 is a cross-sectional view taken along line FF in FIG. 14, FIG. 16 is a bottom view showing a reverse assembly state of the waterproof packing, and FIG. FIG. 17 is a cross-sectional view taken along line GG in FIG. 16.

  The waterproof structure of the switch device of the present embodiment is basically the same as that of the first embodiment. As shown in FIGS. 14 and 15, the swing center line of the operation unit 11 is formed on the peripheral portion 20 a of the waterproof packing 20. The overhanging portion 22 is provided so as to be biased to either one from the Cl position, and a portion Pm that is symmetrical with the overhanging portion 22 with respect to the swing center line Cl of the operation portion 11 inside the peripheral edge of the mounting opening 2Ab. In the present embodiment, in particular, a fitting hole 22a is formed in the overhanging portion 22, and a portion corresponding to the fitting hole 22a is provided inside the peripheral edge of the mounting opening 2Ab. A fitting protrusion 33 that is closely fitted into the fitting hole 22a is provided.

  Therefore, according to the present embodiment, as shown in FIGS. 14 and 15, the fitting protrusion provided with the fitting hole 22 a formed in the projecting portion 22 on the inner side of the peripheral edge portion of the mounting opening 2 Ab in the normal assembly state. By tightly fitting 33, the waterproof packing 20 can be reliably held (temporarily held) when the waterproof packing 20 is assembled, and the assembly workability can be further improved.

  Further, in the present embodiment, when the waterproof packing 20 is reversely assembled, the overhanging portion 22 interferes with the protruding portion 30 as shown in FIGS. Since the protruding portion 22 falls into the inside of the housing 2 and interferes with the internal components, the reverse assembly can be easily recognized.

  (Fourth Embodiment) FIGS. 18 and 19 show a fourth embodiment of the present invention. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted. FIG. 18 is an enlarged cross-sectional view of the annular concavo-convex portion formed between the waterproof packing and the mounting opening, and FIG. 19 is a diagram showing the fitting state of the annular concavo-convex portion in order in FIGS. FIG.

  The waterproof structure of the switch device of the present embodiment is basically an annular shape that closely fits between the peripheral edge portion 20a of the waterproof packing 20 and the inner peripheral edge portion of the mounting opening 2Ab in substantially the same manner as in the first embodiment. Although the uneven portion 31 is formed, particularly in the present embodiment, as shown in FIG. 18, the interference inserted into the annular uneven portion 31 while being compressed and deformed on the waterproof packing 20 side into the inner peripheral portion 31 a to be fitted to each other. A portion 34 is provided.

  That is, the annular concavo-convex portion 31 is configured by the concave portion 32 that surrounds the mounting opening 2Ab and the convex portion 23 that protrudes to the peripheral edge portion 20a of the waterproof packing 20, but the interference portion 34 The inner peripheral part facing the mounting opening 2Ab is slightly bulged, and when the convex part 23 is fitted into the concave part 32, the inner peripheral part of the convex part 23 is strongly strengthened inside the concave part 32. It comes to press. In other words, in the annular concavo-convex portion 31, the inner peripheral side of the annular convex portion 23 provided at the peripheral portion of the waterproof packing 20 is a sealing surface.

  In the present embodiment, a slight gap is formed between the outer periphery of the convex portion 23 and the concave portion 32 so that the convex portion 23 having the interference portion 34 can be easily fitted into the concave portion 32.

  Therefore, according to the present embodiment, when the convex portion 23 of the annular concavo-convex portion 31 is inserted into the concave portion 32 as shown in FIG. 19A, each inner peripheral portion 31a as shown in FIG. 19B. Is inserted by the interference portion 34 and is fitted to the inner peripheral portion of the convex portion 23 while the pressing force acts from the concave portion 32, so that the sealing performance of the inner peripheral portion 31a of the annular concave-convex portion 31 can be improved, Since the interference portion 34 is accompanied by compressive deformation of the convex portion 23 formed on the waterproof packing 20 side, the convex portion 23 is deformed in the outer peripheral direction by the reaction of the compression deformation, and the outer peripheral portion of the annular concavo-convex portion 31 is also in close contact, As a result, sealing performance can be secured at the inner and outer peripheral portions of the annular concavo-convex portion 31, and the dustproof / waterproof performance can be further enhanced.

  In this embodiment, the inner peripheral portion of the convex portion 23 is bulged, but the inner peripheral side of the concave portion 32 may be bulged.

  (Fifth Embodiment) FIGS. 20 and 21 show a fifth embodiment of the present invention. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted. FIG. 20 is an enlarged cross-sectional view of a main part in the middle of assembling the peripheral part of the waterproof packing, and FIG. 21 is an enlarged cross-sectional view of a main part in a state where the peripheral part of the waterproof packing has been assembled.

  The waterproof structure of the switch device of the present embodiment is basically the same as in the first embodiment, in which the peripheral edge 20a of the waterproof packing 20 is sandwiched between the peripheral edge of the mounting opening 2Ab and the upper end of the switch case 12. In particular, in this embodiment, a plurality of strips (in this embodiment) surround the mounting opening 2Ab at a portion where the peripheral edge 20a of the waterproof packing 20 is pressed against the peripheral edge of the mounting opening 2Ab. 2) annular projections 35 are provided.

  The annular protrusions 35 are formed in a triangular shape with a sharp tip at the tip, and each protrudes integrally from the upper surface of the peripheral edge 20a.

  Therefore, according to the present embodiment, when the waterproof packing 20 is properly assembled, the peripheral edge portion 20a of the waterproof packing 20 is connected to the peripheral edge portion of the mounting opening 2Ab and the upper end of the switch case 12 as shown in FIG. Since the plurality of annular projections 35 provided between the peripheral portions 20a of the waterproof packing 20 are pressed against the peripheral portion of the mounting opening 2Ab to be in a crushed state, their crimping surfaces are liquid-tight at a plurality of locations. The waterproof effect can be enhanced by exerting the function.

  By the way, although this invention was demonstrated taking the example in 1st-5th embodiment, various other embodiment can be employ | adopted in the range which does not deviate from the summary of this invention, without being restricted to these embodiments.

The perspective view of the table tap to which this invention is applied. The disassembled perspective view of the table tap to which this invention is applied. The expanded sectional view along the AA line in FIG. The bottom perspective view of waterproof packing in a 1st embodiment of the present invention. Explanatory drawing which shows the waterproof packing in 1st Embodiment of this invention with the top view of (a), the side view of (b), the front view of (c), and the bottom view of (d). The bottom view which shows the normal assembly | attachment state of the waterproof packing in 1st Embodiment of this invention. Sectional drawing along the BB line in FIG. The internal perspective view of the opening part for attachment of the switch formed in the housing in 1st Embodiment of this invention. The bottom view which shows the reverse assembly | attachment state of the waterproof packing in 1st Embodiment of this invention. Sectional drawing along CC line in FIG. The expanded sectional view of the D section in FIG. The expanded sectional view of the E section in FIG. Explanatory drawing which shows the waterproof packing in 2nd Embodiment of this invention with the top view of (a), the side view of (b), and the front view of (c). The bottom view which shows the regular assembly | attachment state of the waterproof packing in 3rd Embodiment of this invention. Sectional drawing along the FF line in FIG. The bottom view which shows the reverse assembly | attachment state of the waterproof packing in 3rd Embodiment of this invention. Sectional drawing along the GG line in FIG. The expanded sectional view of the cyclic | annular uneven | corrugated | grooved part formed between the waterproof packing and the opening part for attachment in 4th Embodiment of this invention. The principal part sectional drawing which shows the fitting state of the cyclic | annular uneven | corrugated | grooved part in 4th Embodiment of this invention later on to (a), (b). The principal part expanded sectional view in the middle of incorporating the peripheral part of the waterproof packing in 5th Embodiment of this invention. The principal part expanded sectional view of the state which completed the integration of the peripheral part of the waterproof packing in 5th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 Housing 2Ab Mounting opening 10 Switch 11 Operation part 12 Switch case 20 Waterproof packing 20a Peripheral part of waterproof packing 20s1, 20s2 Side of peripheral part of waterproof packing 21 Covering part 21b Vertical wall (vertical wall part)
22 Overhanging portion 22a Fitting hole 24, 24a Flat portion 25 Groove portion 27 Covering wall portion 30 Protruding portion 31 Annular uneven portion 31a Inner peripheral portion 33 Fitting protrusion 35 Annular protrusion Cl Oscillating center line Cp Oscillating center point

Claims (11)

It has an operating part and a switch case that supports the central part of the operating part so as to be swingable, and is turned on / off according to the swinging operation of the operating part, and from the mounting opening formed in the housing to the operating part A switch provided with exposed on the surface side,
A flexible waterproof packing that covers a portion exposed from the mounting opening of the operation portion, and whose peripheral portion is sandwiched between the switch case and a housing back surface of the mounting opening peripheral portion;
With
While providing a projecting portion that is biased to one of the swing center line position of the operation portion at the peripheral portion of the waterproof packing, a protrusion is provided on the rear surface of the housing at the periphery of the mounting opening,
When the waterproof packing is assembled in a posture opposite to a normal posture with respect to the swing center line, the overhanging portion and the protruding portion interfere with each other. Waterproof structure.   When the thickness of the overhang portion is increased and the waterproof packing is assembled in the opposite posture, the overhang portion and the protrusion overlap the rear surface of the housing, and the overhang portion and the structure in the housing 2. The waterproof structure of the switch device according to claim 1, wherein the object interferes with the object. Forming the periphery of the waterproof packing into a substantially rectangular shape;
The waterproof structure for a switch device according to claim 1, wherein the overhanging portion is provided to be separated from the corner portion of the substantially rectangular shape.   2. The structure according to claim 1, wherein when the waterproof packing is assembled in the normal posture, the projecting portion and the protruding portion are symmetrical with respect to each other about the center of the mounting opening. The waterproof structure of the switch device according to any one of?   In addition to forming a fitting hole in the overhanging portion, a fitting protrusion closely fitted to the fitting hole is provided at a portion corresponding to the fitting hole on the rear surface of the housing at the periphery of the mounting opening. The waterproof structure of the switch device according to any one of claims 1 to 4.   6. An annular concavo-convex portion that closely fits to each other is provided on both the peripheral portion of the waterproof packing and the housing rear surface of the mounting opening peripheral portion. The waterproof structure of the described switch device.   7. The waterproof structure for a switch device according to claim 6, wherein the annular concavo-convex portion is configured such that an annular convex inner peripheral side provided at a peripheral portion of the waterproof packing is a seal surface.   The waterproof structure for a switch device according to any one of claims 1 to 7, wherein the waterproof packing can be temporarily held by fitting into the mounting opening. While fitting the vertical wall portion provided in the waterproof packing to the opening wall surface of the mounting opening,
At the upper end of the vertical wall portion, the vertical wall portion and the covering wall portion covering the operation portion are connected in a bent state,
The waterproof structure for a switch device according to claim 8, wherein a gap between the covering wall portion and the operation portion is gradually reduced toward the top of the operation portion.   The waterproof packing includes a pair of flat portions formed in a portion corresponding to the operation surface of the operation portion, and a groove portion that separates the flat portions from each other. The waterproof structure of the switch device according to one.   A plurality of annular projections surrounding the mounting opening are provided at a portion where the peripheral edge of the waterproof packing is pressed against the rear surface of the housing at the periphery of the mounting opening. The waterproof structure of the switch device according to any one of the above.

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