Plug-type connection for releasably connecting two bodies
The present invention relates to a plug-type connection for releasably connecting two bodies wherein the first body includes a first connection zone having a plurality of coaxially aligned first connection segments and the second body includes a plurality of coaxially aligned second connection segments. The first connection segment includes at least one segment with a non-circular cross-section and at least one segment having an axially tapering cross-section. The second connection segment includes at least one segment with a non-circular cross section sized and configured for rotatively engaging the non-circular cross section of the first connection segment and at least one segment sized and configured to mate with the at least one tapering section, wherein the tapered section of the first connection segment and the mating section of the second connection segment form an axially non-positive engagement for guiding the first body into engagement with the second body. The axially tapering cross-section of the first connection segment is preferably made from a deformable material so that the axially tapering cross section deforms when it mates with the second connection segment.
1 . A plug-type connection having a central axis for releasably connecting a first body and a second body wherein the first body includes a first connection zone having a longitudinal axis, a length, and a plurality of first connection segments and the second body includes a second connection zone having a longitudinal axis, a length, and a plurality of second connection segments, the connection further comprising:
wherein the plurality of first connection segments are arranged coaxially along the longitudinal axis of the first body, the plurality of first connection segments includes at least one segment with a non-circular cross-section;
wherein the plurality of second connection segments are arranged coaxially along the longitudinal axis of the second body, the plurality of second connection segments include at least one segment with a non-circular cross section sized and configured for rotatively engaging the non-circular cross section of the first connection segment;
wherein the plurality of first connection segments includes at least one segment having an axially tapering cross-section and the plurality of second connection segments includes at least one segment sized and configured to mate with the at least one tapered section, wherein the tapered section of the first connection segment and the mating section of the second connection segment form an axially non-positive engagement for guiding the first body into engagement with the second body and wherein the axially tapering cross-section of the first connection segment is made from a deformable material so that the axially tapering cross section deforms when it mates with the second connection segment.
2 . The plug-type connection of claim 1 , wherein the segments in the second connection zone axially adjoin one another with respect to the central axis of the second connection zone and differ from one another in shape.
3 . The plug-type connection of claim 2 , wherein the segments in the first connection zone axially adjoin one another with respect to the central axis of the first connection zone and differ from one another in shape.
4 . The plug-type connection of claim 1 , wherein the segments in the second connection zone include a shaft segment and a bore segment.
5 . The plug-type connection of claim 1 , wherein the segments in the first connection zone comprise a shaft segment and a bore segment.
6 . The plug-type connection of claim 1 , wherein the first connection zone comprises at least two pieces.
7 . The plug-type connection of claim 6 , wherein at least one segment in the first connection zone is coaxially displaceable relative to the other segments in the first connection zone.
8 . The plug-type connection of claim 1 , wherein the second connection zone comprises at least two pieces.
9 . The plug-type connection of claim 8 , wherein at least one segment in the second connection zone is coaxially displaceable relative to the at least one other segment in the second connection zone.
10 . The plug-type connection of claim 1 , wherein the at least one segment in the first connection zone having the non-circular cross-section and forming the rotationally positive engagement with the at least one segment in the second connection zone, also forms a non-positive engagement with one segment in the second connection zone which is oriented generally parallel to the central axis of the plug-type connection.
11 . The plug-type connection of claim 1 , wherein at least one segment in the second connection zone forming the rotationally positive engagement with the at least one segment in the first connection zone having the non-circular cross-section, also forms a non-positive engagement with one segment of the first connection zone which is oriented generally parallel to the central axis of the plug-type connection.
12 . The plug-type connection of claim 1 , wherein the segments forming the positive engagement have cross-sections of complementary geometric shape.
13 . The plug-type connection of claim 12 , wherein the geometric shape of the complementary cross-sections is selected from the group consisting of polygonal, hexagonal, star-shape, or elliptical.
14 . The plug-type connection of claim 1 , wherein the number of segments in the first connection zone is greater than the number of segments in the second connection zone.
15 . The plug-type connection of claim 14 , wherein the number of segments in the first connection zone is greater than the number of segments in the second connection zone by one segment.
16 . The plug-type connection of claim 1 , wherein the number of segments in the first connection zone and the number of segments in the second connection zone are identical.
17 . The plug-type connection of claim 16 , wherein the first connection zone and the second connection zone each have three segments.
18 . The plug-type connection of claim 17 , wherein the segments in the second connection zone comprise a bore segment having a circular cylindrical bore segment with a first diameter, a hexagon socket segment having a first width measured across a pair of opposing flats of the hexagon socket and a second width measured across a pair of adjacent corners of the hexagon socket, and a cylindrical bore segment having a second diameter, the first diameter measuring a distance greater than the second width and the second diameter measuring a distance less than the first width.
19 . The plug-type connection of claim 18 , wherein the segments in the first connection zone comprise a shaft segment having a circular cylindrical shaft with a first diameter, a hexagonal segment having a first width measured across a pair of adjacent corners of the hexagonal segment and a second width measured across a pair of opposing flats of the hexagonal segment, and the axially tapering shaft segment has an angle between about 2 and 10 degrees, the first diameter in the first connection zone measuring a distance substantially equal to the first diameter of the second connection zone and the tapering shaft segment having a maximum diameter which measures a distance less than the second diameter in the second connection zone.
20 . The plug-type connection of claim 17 , wherein the segments in the second connection zone comprise a bore segment with a circular cylindrical bore portion having a first diameter, a star-shaped socket segment with six branches having an inside diameter and an outside diameter, and a cylindrical bore segment having a second diameter, the first diameter measuring a distance greater than or equal to the outside diameter of the star shaped socket segment and the second diameter measuring a distance less than or equal to the inner diameter of the star shaped socket segment.
21 . The plug-type connection of claim 20 , wherein the segments in the first connection zone comprise a shaft segment with a circular cylindrical shaft having a first diameter, a star-shaped segment with six branches having an inside diameter and an outside diameter and a frusto-conical shaft segment having a cone angle of between about 2 and 10 degrees, the first diameter in the first connection zone measuring a distance equal to the first diameter in the second connection zone and the frusto-conical shaft segment having a maximum diameter and a minimum diameter, the maximum diameter measuring a distance greater than the second diameter in the second connection zone and the minimum diameter measuring a distance less than the second diameter in the second connection zone.
22 . The plug-type connection of claim 1 , wherein at least one of the segments in the second connection zone has a conically tapered form converging in the direction in which the plugging takes place.
23 . The plug-type connection of claim 1 , wherein at least one of the segments in the first connection zone has a conically tapered form converging in the direction in which the plugging takes place.
24 . The plug-type connection of claim 1 , wherein at least one of the segments in the second connection zone has a cylindrical form.
25 . The plug-type connection of claim 1 , wherein at least one of the segments in the first connection zone on the frontal part of the first body has a cylindrical form.
26 . The plug-type connection of claim 1 , wherein one of the first body and second body is a screw and the other one is a screwdriver.
27 . The plug-type connection of claim 26 , wherein the screwdriver comprises a longitudinal axis, a front end facing the screw, and a bore which is open towards the front end of the screwdriver and extending coaxially to the longitudinal axis.
28 . The plug-type connection of claim 27 , wherein an axially displaceable pin is positioned in the bore.
29 . The plug-type connection of claim 28 , wherein the pin is pushed into the bore by a resilient member.
30 . The plug-type connection of claim 29 , wherein the pin is capable of being pushed into contact with the screw.
31 . The plug type connection of claim 30 , wherein pushing the pin into contact with the screw causes the segments in the second connection zone and the segments in the first connection zone which form a positive engagement between the screw and the screwdriver to cease to be in positive engagement.
32 . The plug-type connection of claim 31 , wherein pushing the pin into contact with the screw causes the screw to disengage from the screwdriver.