Switch mechanism usable underwater
First Claim
Patent Images
1. A switch mechanism usable underwater comprising:
- an exterior member having a first hole and a second hole;
a first pressing operation member being watertight against the first hole of the exterior member;
a second pressing operation member being watertight against the second hole of the exterior member;
first switch means being turned on/off by the first pressing operation member;
second switch means being turned on/off by the second pressing operation member; and
a lever member being rotatable around a fulcrum being provided in the exterior member, pressing the first pressing operation member at a first contact point when rotating in a first direction, and pressing the second operation member at a second contact point when rotating in a second direction opposite to the first direction, wherein, when a cross-sectional area at a boundary of water and air in a state of the first pressing operation member being inserted into the first hole is defined as S1, and a cross-sectional area at a boundary of water and air in a state of the second pressing operation member being inserted into the second hole is defined as S2, and wherein, when a distance between the fulcrum and the first contact point is defined as R1, and a distance between the fulcrum and the second contact point is defined as R2, and wherein, when static frictional force occurring when the first pressing operation member is forced into the first hole is defined as F1, and static frictional force occurring when the second pressing operation member is forced into the second hole is defined as F2, and wherein, when the water pressure is defined as P, the lever member has a rotational balance of the water pressure when the following mathematical formula is satisfied;
P×
S1×
R1+F1×
R1=P×
S2×
R2+F2×
R2
2 Assignments
0 Petitions
Accused Products
Abstract
The present invention provides a switch mechanism usable underwater including a rear cover serving as an exterior member, two shaft members being displaceable in a shaft direction and fitting into two shaft holes having the same cross-sectional area provided in the rear cover, an O-ring watertightly maintaining the shaft member and the shaft hole, and a lever member being engaged with the two shaft members in a manner to be capable of pressing-down or pulling-up the shaft member, and being configured to balance water pressure applied to one shaft member with that applied to the other shaft member.
24 Citations
11 Claims
-
1. A switch mechanism usable underwater comprising:
-
an exterior member having a first hole and a second hole;
a first pressing operation member being watertight against the first hole of the exterior member;
a second pressing operation member being watertight against the second hole of the exterior member;
first switch means being turned on/off by the first pressing operation member;
second switch means being turned on/off by the second pressing operation member; and
a lever member being rotatable around a fulcrum being provided in the exterior member, pressing the first pressing operation member at a first contact point when rotating in a first direction, and pressing the second operation member at a second contact point when rotating in a second direction opposite to the first direction, wherein, when a cross-sectional area at a boundary of water and air in a state of the first pressing operation member being inserted into the first hole is defined as S1, and a cross-sectional area at a boundary of water and air in a state of the second pressing operation member being inserted into the second hole is defined as S2, and wherein, when a distance between the fulcrum and the first contact point is defined as R1, and a distance between the fulcrum and the second contact point is defined as R2, and wherein, when static frictional force occurring when the first pressing operation member is forced into the first hole is defined as F1, and static frictional force occurring when the second pressing operation member is forced into the second hole is defined as F2, and wherein, when the water pressure is defined as P, the lever member has a rotational balance of the water pressure when the following mathematical formula is satisfied;
P×
S1×
R1+F1×
R1=P×
S2×
R2+F2×
R2 - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A switch mechanism usable underwater comprising:
-
an exterior member having a first hole and a second hole;
a pressing operation member being watertight against the first hole of the exterior member;
switch means being turned on/off by a movement of the pressing operation member;
water pressure detecting means being watertight against the second hole of the exterior member; and
a lever member disposed to be rotatable around a rotation supporting portion disposed inside of the exterior member, for applying detected force of a water pressure occurring when the water pressure detecting means is pressed to the pressing operation member by the water pressure underwater, wherein, the detected force of the water pressure is set to be equal to or greater than resultant force of an external force being received by the pressing operation member from the water pressure as an external pressure, and internal force being received by the pressing operation member from the internal member as force applying in a direction opposite to an applying direction of the external pressure. - View Dependent Claims (8)
-
-
9. A switch mechanism usable under water comprising:
-
a pressing operation member capable of being moved by external operation, being watertight against an exterior member, and receiving a first force occurring at a first cross-sectional area of a boundary between water and air underwater corresponding to a water pressure;
switch means being turned on/off by a movement of the pressing operation member;
force of water pressure generating member being disposed to be watertight against the exterior member, having a second cross-sectional area at a boundary of the water and the air, and generating a second force at a second cross-sectional area of a boundary between the water and the air underwater corresponding to the water pressure; and
a transmitting member for transmitting the second force to the pressing operation member;
wherein the second force generated by the force of water pressure generating member is set to be greater than the first force received by the pressing operation member by configuring the second cross-sectional area of the force of water pressure generating member to be greater than the first cross-sectional area of the pressing operation member.
-
-
10. A switch mechanism usable underwater comprising:
-
an exterior member having a first hole and a second hole;
a pressing operation member being watertight against the first hole of the exterior member, capable of being operated from outside of the exterior member;
switch means being turned on/off by the pressing operation member;
a water pressure detecting member being watertight against the second hole of the exterior member, and generating force corresponding to the water pressure under water; and
a lever member being rotatable around a fulcrum, for approximately balancing the water pressure applied to the pressing operation member underwater by receiving force occurring at the water pressure detecting member at a point of force and applying the force to the pressing operation member at a point of action. - View Dependent Claims (11)
-
Specification