JP2015088230A - Waterproof switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waterproof switch which reduces a force required during rotary operation and achieves good waterproofness.SOLUTION: A waterproof switch 1 includes: a knob 3; a switch unit 4 connected with the knob 3; a case 5 incorporating the switch unit 4; and a packing 6 provided between the knob 3 and the case 5. The packing 6 includes: an annular base part 61; and two tongue pieces 62, 63 which are formed protruding from a side surface of the base part 61. The base part 61 is fixed to the case 5, and the two tongue pieces 62, 63 contact with the knob 3. The first tongue piece 62 of the two tongue pieces 62, 63 faces to the upper side and the second tongue piece 63 faces to the lower side.

Description

  The present invention relates to a waterproof switch, and more particularly to a waterproof switch having a push switch function and a rotation function.

  The conventional waterproof switch is arranged between an exterior case, a push button stored in the exterior case, a key top that has rotation and presses the push button through the exterior case, and between the exterior case and the key top. The gasket has a waterproof and elastic packing, and the packing is formed of, for example, silicon rubber or soft synthetic resin, and the hollow portion is formed by tightening the boss with the lower flange and tightening the shaft portion with the upper flange. It was hermetically sealed to waterproof the push button (for example, see Patent Document 1).

JP 2009-70657 A

  In the conventional waterproof switch, the boss is tightened by the lower flange and the shaft portion is tightened by the upper flange to hermetically seal the hollow portion and waterproof the push button. Therefore, there is a problem that the waterproof property may be inferior even when the switch is operated with a large force when rotating the switch, or even if the switch can be operated with a small force.

  Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a waterproof switch having a small waterproof force and a good waterproof property.

  The waterproof switch of the present invention is a waterproof switch comprising a knob, a switch unit coupled to the knob, a case incorporating the switch unit, and a packing provided between the knob and the case. The packing includes an annular base portion and two tongue pieces protruding from a side surface of the base portion, the base portion is fixed to the case or the knob, and the two tongue pieces are the knob or the While contacting the case, of the two tongue pieces, the first tongue piece is directed upward, and the second tongue piece is directed downward.

  According to the waterproof switch according to the present invention, it is possible to provide a waterproof switch having a small waterproof force and a good waterproof property.

The front view of the operating device provided with the waterproof switch which concerns on 1st Embodiment of this invention. Sectional drawing of the AA line in FIG. The fragmentary sectional perspective view of the packing of the embodiment. Sectional drawing of 2nd Embodiment of the invention.

  A waterproof switch 1 according to a first embodiment of the present invention will be described with reference to the drawings.

  The waterproof switch 1 is attached to a device such as the operation device 2. The waterproof switch 1 includes at least a knob 3, a switch unit 4, a case 5, and a packing 6. Reference numeral 7 denotes a circuit board.

  The knob 3 is made of a synthetic resin, and includes a circular disc portion 31, a protruding portion 32 provided at a central portion of the disc portion 31, and a cylindrical portion 33 provided at a peripheral portion of the disc portion 31. .

  The protrusion 32 has an outer periphery with a circular cross-sectional shape. In the present embodiment, the protrusion 32 includes a hole 34 having a D-shaped cross section inside. The switch unit 4 is inserted and connected to the hole 34, and the rotation operation and push operation of the knob 3 are transmitted to the switch unit 4. Further, the retaining member 8 is fixed to the end portion of the protruding portion 32. The retaining member 8 is made of metal and has an annular shape. The retaining member 8 is fixed by deforming the holding portion 35 provided at the end of the protruding portion 32 by heat. The retaining member 8 prevents the knob 3 from coming off by contacting the packing 6 when the knob 3 is pulled in the direction to be removed from the case 5.

  As described above, the switch unit 4 can be rotated and pushed, and is mounted on the circuit board 7.

  The case 5 is made of synthetic resin and incorporates the switch unit 4 and the circuit board 7. The case 5 includes a cylindrical portion 51. A fixing projection 52 for holding the packing 6 is provided inside the cylindrical portion 51.

  The packing 6 is provided between the knob 3 and the case 4 and is formed of an elastic body having elasticity such as rubber. The packing 6 includes an annular base portion 61 and two tongue pieces 62 and 63 that are formed to project from the inner side surface of the base portion 61. Further, the groove portion 64 into which the fixing protrusion 52 described above is fitted is provided on the outer side surface of the base portion 61. By fitting the groove portion 64 into the fixing protrusion 52, the base portion 61 is attached to the case 5. Is fixed to the inside of the cylindrical portion 51.

  The two tongue pieces 62 and 63 are provided on the inner side surface of the base portion 61 without a break. The two tongue pieces 62 and 63 are both in contact with the knob 3, and in contact with the outer periphery of the protruding portion 32 of the knob 3 in this embodiment. Of the two tongue pieces 62, 63, the first tongue piece 62 faces upward and the second tongue piece 63 faces downward.

  Moreover, the cross-sectional shape of the front-end | tip part of the two tongue pieces 62 and 63 is circular, makes the contact area of the knob 3 the minimum, and does not inhibit the operativity of the knob 3. FIG.

  With the configuration described above, it is possible to provide a waterproof switch having a small waterproof force and a good waterproof property.

  Further, when the first tongue piece 62 faces upward and comes into contact with the knob 3, it is possible to prevent liquid from entering between the knob 3 and the case 5. Further, when the second tongue 63 faces downward and comes into contact with the knob 3, for example, when the external pressure is lower than the inside of the case 5, the knob 3 and the case are in a negative pressure state. 5 can be kept airtight.

  Next, a second embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the same and equivalent part as 1st Embodiment, and the detailed description is abbreviate | omitted.

  In the first embodiment, the packing 6 is fixed to the case 5, and the two tongue pieces 62 and 63 of the packing 6 are in contact with the knob 3. However, in this embodiment, the packing 16 is attached to the knob 3. The two tongue pieces 162 and 163 of the packing 16 are in contact with the case 5.

  The protrusion 32 of the knob 3 is provided with a fixing projection 36 for holding the packing 16 over the entire circumference.

  Inside the cylindrical portion 51 of the case 5, a retaining member 8 is provided so that the retaining member 8 contacts and prevents the knob 3 from coming off.

  The packing 16 includes an annular base portion 161 and two tongue pieces 162 and 163 that are formed to protrude from the outer side surface of the base portion 161. Further, a groove portion 164 into which the fixing protrusion 36 described above is fitted is provided on the inner side surface of the base portion 161. By fitting the groove portion 164 into the fixing protrusion 36, the base portion 161 is attached to the knob 3. It is fixed to the outside of the protrusion 32.

  The two tongue pieces 162 and 163 are provided on the outer side surface of the base portion 161 without any breaks. The two tongue pieces 162 and 163 are both in contact with the case 5, and are in contact with the inner periphery of the cylindrical portion 51 of the case 5 in this embodiment. Of the two tongue pieces 162 and 163, the first tongue piece 162 faces upward and the second tongue piece 163 faces downward.

  Moreover, the cross-sectional shape of the front-end | tip part of the two tongue pieces 162 and 163 is circular, makes the contact area of case 5 the minimum, and does not inhibit the operativity of the knob 3. FIG.

  With the configuration described above, it is possible to provide a waterproof switch having a small waterproof force and a good waterproof property.

  Further, when the first tongue piece 162 faces upward and comes into contact with the case 5, it is possible to prevent liquid from entering between the knob 3 and the case 5. Further, when the second tongue piece 163 faces downward and comes into contact with the case 5, for example, when the external pressure is lower than the inside of the case 5, the knob 3 and the case are in a negative pressure state. 5 can be kept airtight.

  The present invention is applicable to a waterproof switch, in particular, a waterproof switch having a push switch function and a rotation function.

DESCRIPTION OF SYMBOLS 1 Waterproof switch 2 Operating device 3 Knob 4 Switch unit 5 Case 6, 16 Packing 7 Circuit board 8 Retaining member 31 Disc part 32 Projection part 33 Cylindrical part 34 Hole part 35 Holding part 51 Cylindrical part 52 Fixing protrusion 61 Base part 62, 162 First tongue 63, 163 Second tongue 64 Groove

Claims (3)

In a waterproof switch comprising a knob, a switch unit coupled to the knob, a case incorporating the switch unit, and a packing provided between the knob and the case, the packing has an annular base And two tongue pieces protruding from the side surface of the base portion, the base portion is fixed to the case or the knob, the two tongue pieces are in contact with the knob or the case, and the two A waterproof switch characterized in that, of the two tongue pieces, the first tongue piece faces upward and the second tongue piece faces downward. The case includes a cylindrical portion, the knob includes a protruding portion having an outer periphery with a circular cross-sectional shape, the base portion is fixed to the inside of the cylindrical portion, and the two tongue pieces are the protruding portions of the knob. The waterproof switch according to claim 1, wherein the waterproof switch is in contact with an outer periphery of the portion. The waterproof switch according to claim 2, wherein a retaining member that contacts the base portion is provided at an end of the protruding portion.

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