Medical device with medical device hinge
A medical device has a first hinge part ( 17 ) including two hinge arms ( 15, 16 ), which are arranged at a distance apart, and a hinge pin ( 32; 52 ), which is extended between the hinge arms along a longitudinal axis ( 38; 55 ). A second hinge part ( 18 ) is in certain areas accommodated between the two hinge arms and is passed through by a hinge cavity ( 31; 51 ). The hinge pin is accommodated in a pivotably movably in the hinge cavity. The hinge pin and the hinge cavity have a central contact region ( 33; 56 ) with contact between hinge pin and hinge cavity. Clearance regions ( 36, 37; 57, 58 ) border the contact region on both sides and are extended up to the hinge arms, without touching contact between hinge pin and hinge cavity, in order to ensure an exclusively central force transmission between the hinge pin and the hinge cavity.
1 . A medical device comprising a hinge arrangement, the hinge arrangement comprising:
a first hinge part comprising a first hinge part interior surface, a first hinge arm and a second hinge arm, the first hinge arm and the second hinge arm being arranged spaced apart by a distance;
a second hinge part accommodated in certain areas between the first hinge arm and the second hinge arm and configured for a pivot motion of the first hinge part about a pivot axis in relation to the second hinge part, the second hinge part having a hinge cavity surface defining a hinge cavity that passes through the second hinge part, the first hinge part interior surface defining at least a portion of a second hinge part interior space for receiving at least a portion of the second hinge part, the first hinge part interior surface being in contact with the portion of the second hinge part, the first hinge part interior surface extending continuously from a position adjacent to a portion of one of the two hinge arms to another position adjacent to a portion of another one of the two hinge arms, the first hinge part interior surface being parallel to the pivot axis; and
a hinge pin extending between the hinge arms along a longitudinal axis to define a pivot axis of the hinge arrangement, wherein:
the hinge pin is elastically deformable;
the hinge pin is pivotably movable in the hinge cavity; and
the hinge pin has a central contact region in direct contact with the hinge cavity surface of the second hinge part;
the hinge pin has a first clearance region without touching contact between the hinge pin and the hinge cavity surface of the second hinge part, the first clearance region extending within the second hinge part from the central contact region to the first hinge arm;
the hinge pin has a second clearance region without touching contact between the hinge pin and the hinge cavity surface of the second hinge part, the second clearance region extending within the second hinge part between the central contact region and the second hinge arm; and
the central contact region, the first clearance region and the second clearance region ensure an exclusively central force transmission between the hinge pin and the second hinge part.
2 . A medical device according to claim 1 , wherein the hinge cavity surface is configured as a stepped bore comprising:
a centrally arranged guide bore defining the central contact region;
a first clearance bore at a first side of the guide bore, the guide bore having a smaller cross section than the first clearance bore; and
a second clearance bore at a second side of the guide bore, the guide bore having a smaller cross section than the second clearance bore.
3 . A medical device according to claim 2 , wherein the hinge pin between the first hinge arm and the second hinge arm is configured with a constant profiling.
4 . A medical device according to claim 2 , wherein a cross-sectional area of the guide bore amounts to less than 50 percent of a cross-sectional area of at least one of the first clearance bore and the second clearance bore.
5 . A medical device according to claim 1 , wherein the hinge pin comprises:
a centrally arranged guide portion;
a first clearance portion at a first side of the guide portion, the guide portion having a larger cross section than the first clearance portion; and
a second clearance portion at a second side of the guide portion, the guide portion having a larger cross section than the second clearance portion.
6 . A medical device according to claim 5 , wherein the hinge cavity is configured as a bore having a constant profiling.
7 . A medical device according to claim 5 , wherein a cross-sectional area of at least one of the first clearance portion and the second clearance portion amounts to less than 50 percent of a cross-sectional area of the guide portion.
8 . A medical device according to claim 1 , wherein an extent of the central contact region in a direction of the longitudinal axis amounts to less than 30 percent of at least one of the first clearance region and the second clearance region, the hinge cavity surface defining at least a portion of at least one of the first clearance region and the second clearance region, the portion of the second hinge part comprising a second hinge part portion surface located between the first hinge arm and the second hinge arm, the first hinge part interior surface being in contact with an entire length of the second hinge part portion surface.
9 . A medical device comprising a hinge arrangement, the hinge arrangement comprising:
a first hinge part comprising two hinge arms, which are arranged at a distance apart, and a first hinge part comprising a first hinge part interior surface;
a second hinge part, the hinge arrangement being configured for a pivot motion of the first hinge part about a pivot axis in relation to the second hinge part, the first hinge part interior surface defining at least a portion of a second hinge part interior space for receiving at least a portion of the second hinge part, the first hinge part interior surface being in contact with the portion of the second hinge part, the first hinge part interior surface extending continuously from a position adjacent to a portion of one of the two hinge arms to another position adjacent to a portion of another one of the two hinge arms, the first hinge part interior surface being parallel to the pivot axis; and
an elastically deformable hinge pin extending between the hinge arms along a longitudinal axis to define a pivot axis of the hinge arrangement, wherein:
the second hinge part is, in certain areas, accommodated between the two hinge arms and the second hinge part has a hinge cavity passing through the second hinge part and wherein the hinge pin is pivotably movable in the hinge cavity; and
the hinge pin has a central contact region in direct contact with the second hinge part at the hinge cavity, and the hinge pin has clearance regions, which border the contact region on both sides of the contact region and are extended within the second hinge part from the contact region up to the hinge arms, without touching contact between hinge pin and the second hinge part at the hinge cavity, in order to ensure an exclusively central force transmission between the hinge pin and the second hinge part at the hinge cavity.
10 . A medical device according to claim 9 , wherein the hinge cavity is configured as a stepped bore having a centrally arranged guide bore which has a smaller cross section than clearance bores which border the guide bore on both sides of the guide bore, the portion of the second hinge part comprising a second hinge part portion surface located between the two hinge arms, the first hinge part interior surface being in contact with an entire length of the second hinge part portion surface.
11 . A medical device according to claim 10 , wherein the hinge pin between the hinge arms is configured with a constant profiling.
12 . A medical device according to claim 11 , wherein a cross-sectional area of the guide bore amounts to less than 50 percent of a cross-sectional area of the clearance bore.
13 . A medical device according to claim 10 , wherein a cross-sectional area of the guide bore amounts to less than 50 percent of a cross-sectional area of the clearance bore.
14 . A medical device according to claim 9 , wherein the hinge pin is configured with a centrally arranged guide portion, which has a larger cross section than clearance portions which border this same on both sides.
15 . A medical device according to claim 14 , wherein the hinge cavity is configured as a bore having a constant profiling.
16 . A medical device according to claim 15 , wherein a cross-sectional area of the clearance portion amounts to less than 50 percent of a cross-sectional area of the guide portion.
17 . A medical device according to claim 14 , wherein a cross-sectional area of the clearance portion amounts to less than 50 percent of a cross-sectional area of the guide portion.
18 . A medical device according to claim 9 , wherein:
the hinge pin is configured with a centrally arranged guide portion, which has a larger cross section than clearance portions which border the guide portion on both sides of the guide portion, and
the hinge cavity is configured as a stepped bore having a centrally arranged guide bore which guide bore has a smaller cross section than clearance bores which border the guide bore on both sides of the guide bore.
19 . A medical device according to claim 9 , wherein an extent of the central contact region in a direction of the longitudinal axis amounts to less than 30 percent of an extent of one of the clearance regions in the direction of the longitudinal axis.