Brechkupplung

Abstract

The invention relates to a breakaway coupling (12) with a first coupling piece (1) having several contact pins (1.1) and with a second coupling piece (2) to be connected, having corresponding contact sockets (2.1), wherein the first coupling piece (1) is designed as a coupling shoe and has a circumferential rim (1.2) that defines a recess (1.3) within which the contact pins (1.1) are arranged in a contact surface (1.4), wherein the second coupling piece (2) is designed as a coupling plug and has a shoulder (2.2) with a circumferential guide surface (2.3), wherein the shoulder (2.2) defines a plugging surface (2.4) in which the contact sockets (2.1) are arranged.

Description

[0001] The invention relates to a breakaway coupling with a first coupling piece, with several contact pins and with a second coupling piece to be connected with corresponding contact sockets, wherein the first coupling piece is designed as a coupling shoe and has a circumferential rim that defines a recess within which the contact pins are arranged in a contact surface, wherein the second coupling piece is designed as a coupling plug and has a shoulder with a circumferential guide surface, wherein the shoulder defines a plugging surface in which the contact sockets are arranged.

[0002] A breakaway coupling is already known from DE 10 2010 011 271 B4 with two axially interlocking and axially overlapping partial housings, in the ends of which connecting cables are received.

[0003] DE 94 00 329 A describes a breakaway coupling for a ten-pole connection of flexible electrical cables.

[0004] The invention is based on the objective of designing and arranging a breakaway coupling in such a way that a wider range of applications is possible.

[0005] The problem is solved according to the invention by providing a sealing element that can be brought into operative contact with the respective coupling piece when the two coupling pieces are connected. The sealing element ensures protection of the contacts against water and moisture. The necessary application or shaping of the sealing element when connecting the coupling pieces to achieve the sealing effect requires an additional force V, which must be applied. An additional force T is also necessary when separating the coupling pieces. In addition to a force L for releasing the contact pins from the contact sockets, the force T is primarily determined by an initial static friction component between the sealing element or its sealing surface and the coupling piece moving relative to it, or between the coupling piece and its inner surface.

[0006] According to the invention, this static friction component is taken into account when determining and defining the refractive force, so that a tolerance for the refractive force can be maintained.

[0007] According to the invention, the problem is also solved by a coupling piece of a breakaway coupling. a) with a connecting cable for an electronic component_A and / or b) with a connecting cable and an electronic component_A connected to it and / or c) mounted on a housing of an attached electronic component_B.

[0008] It can also be advantageous if the sealing element is designed as an O-ring and is placed within a groove on the inner surface of the board or within a groove in the guide surface. An O-ring is a very simple and cost-effective solution.

[0009] Furthermore, it can be advantageous if a) the sealing element is arranged on the rim and can be applied sealingly against the guide surface when both coupling pieces are connected; or b) the sealing element is arranged on the guide surface and can be applied sealingly against an inner surface of the rim when connecting both coupling pieces.

[0010] The guide surface and the inner surface are the central surfaces that move relative to each other. The placement of the sealing element in this area minimizes the internal volume of the coupling that needs to be sealed.

[0011] It can also be advantageous if the sealing element has a bearing surface and a sealing surface, whereby a) the sealing element has a triangular cross-sectional shape, wherein the bearing surface and the sealing surface enclose an obtuse angle_α1 or b) the sealing element has a rectangular cross-sectional shape, with an obtuse angle_α2 enclosed between i) the guide surface and the plug-in surface or ii) Inner surface of the board and the contact surface.

[0012] This ensures that when the coupling is released, the sealing element or its sealing surface is immediately lifted from the opposite surface, so that the influence on the force_T required to separate the coupling only comes into play initially.

[0013] Advantageously, a central axis_m0 can be provided, arranged parallel to a section of the guide surface and maintaining the same distance_a0 to the opposite sections of the guide surface. Some of the contact pins are designed as retaining pins, and some of the contact bushings are designed as retaining bushings. At least four retaining pins and four retaining bushings are provided, positioned along the central axis_m0. This increases the holding force, which in turn leads to a corresponding increase in the contact force of the sealing element. This, in turn, results in improved sealing. In particular, temperature differences between the environment and the interior to be sealed can lead to air exchange and thus moisture ingress if the sealing is insufficient.

[0014] Of particular importance for the present invention is the provision of an axis_s1 which is arranged parallel to the central axis_m0 which has a distance_a1 to the section of the guide surface, with a1 < a0, wherein at least five contact pins or contact sockets are provided which are placed along the axis_s1.

[0015] In connection with the design and arrangement according to the invention, it can be advantageous to provide an axis_s2 that is arranged parallel to the central axis_m0, which has a distance_a2 to the section of the guide surface, with a2 > a0, wherein at least six contact pins or contact sockets are provided that are placed along the axis_s2. A different number of contacts along the two axes_s1,_s2 results in an asymmetrical distribution of the holding force when the breakaway clutch is opened by tilting about the respective tilting axis.

[0016] Furthermore, it can be advantageous if at least two contact pins or contact sockets, positioned along the same axis m0, s1, s2, are offset relative to this axis by a dimension v. This results in an optimal wall thickness between the contact pins on the one hand and the contact sockets on the other.

[0017] Furthermore, it can be advantageous if the sealing element has a sealing surface, where the sealing surface is profiled. The profiling ensures a higher contact pressure of the sealing element in the area of ​​a local profiled elevation.

[0018] Furthermore, it can be advantageous if the sealing surface has circumferential grooves and / or circumferential lamellae with respect to a longitudinal axis. The lamellae have a similarly advantageous sealing principle as a shaft seal.

[0019] Further advantages and details of the invention are explained in the claims and the description and illustrated in the figures. Fig. 1a, Fig. 1b a perspective view of a breakaway coupling in the closed and open states; Fig. 2 a perspective view of both coupling pieces from the front; Fig. 3a, Fig. 3b a schematic diagram of the respective coupling piece in front view; Fig. 4a - 4c a perspective sectional view of both coupling pieces in the semi-closed and closed states; Fig. 5a, Fig. 5b a sectional view of the sealing element; Fig. 6 A schematic diagram of two electronic components with a cable connection and breakaway coupling.

[0020] The in Fig. The breakaway coupling shown in Figure 1a has a first coupling piece 1 and a second coupling piece 2, which are connected to each other. Each coupling piece also has a connecting cable 4 (not shown) and a strain relief 4.1 permanently attached to the respective coupling piece. There are several ways to open the coupling. One way is to pull both coupling pieces 1 and 2 apart along the longitudinal axis 7, i.e., along the two oppositely pointing arrows 7.1 and 7.2, so that the two coupling pieces 1 and 2 are separated as shown in Figure 1a. Fig. 1b is shown, separated.

[0021] As an alternative to this method of pulling apart along the longitudinal axis 7, it would also be possible to open the breakaway coupling by a pivoting movement. In this case, both coupling pieces could be pivoted downwards (pair of arrows U) or upwards (pair of arrows O), as indicated by the circular arrows, each about the respective pivoting axis 8.1, 8.2 of the respective coupling piece 1, 2.

[0022] In the separate position according to Fig. 1b shows the front of the second coupling piece 2 designed as a coupling plug, with a mating surface 2.4 within which the various contact sockets 2.1 (not shown here) are located. Each coupling piece 1, 2 consists of several housing parts that are coupled together via a connecting screw 5 or a pair of connecting screws 5.

[0023] In the front view Fig. Figure 2 shows the first coupling piece 1, designed as a coupling shoe, and the second coupling piece 2, designed as coupling pieces. The coupling shoe 1 is characterized by a rim 1.2, which extends around its circumference as a housing wall segment and defines a recess 1.3, which in turn is bounded internally by a contact surface 1.4. Several contact pins 1.1 are arranged within the contact surface 1.4, which are contacted inside the coupling shoe 1 by the cable (not shown). Each contact pin has a mushroom-shaped base and serves to be inserted into the respective contact socket 2.1 of the coupling plug 2. The coupling plug 2 has a mating surface 2.4, which is shown here from the front. Several plug sockets are arranged within the mating surface 2.4. The mating surface 2.4 is bounded around its circumference by a shoulder 2.2, on which a circumferential sealing element 3 is provided. A total of 15 contact sockets 2.1 and, correspondingly, 15 contact pins 1.1 are provided.

[0024] After Fig. Figure 3a shows the distribution of the contact sockets or contact pins on the plug-in surface 2.4. The various contact sockets 2.1 are arranged along three axes: a central axis m0 and two further axes s1 and s2. The central axis m0 leads to a guide surface 2.3, which defines the circumference of the plug-in surface 2.4. Fig. 2 the sealing element is arranged. More precisely, the central axis_m0 has a distance_a0 to a section 2.3a of the guide surface, while axis_s1 has a smaller distance_a1 and axis_s2 has a distance_a2 that is again greater than distance_a0. Four contact bushings are arranged side by side on the central axis_m0, five contact bushings are arranged side by side on axis_s1, and six contact bushings are arranged on axis_a2. The contact bushings are approximately the same distance apart with respect to their arrangement on the respective axes_m0,_s1,_s2. The distance between the outermost contact bushing on each axis and a right or left section 2.3c of the guide surface 2.3 is significantly greater than the distance between the contact bushings with respect to axes_m0,_s1. On axis_s2, the distance to this section_2.3c on the right and left is approximately the same as the relative distance between the contact bushings.

[0025] According to the embodiment Fig. 3b Regarding the distribution on the respective axes m0, s1, and s2, some of the contact sockets are arranged offset. With respect to axis m0, the two middle sockets are shifted upwards by an offset V. With respect to axis s1, the three middle contact sockets are shifted upwards by the offset V, and with respect to axis s2, the two middle sockets are also shifted upwards by the offset V. The positioning of the corresponding contact pins of the coupling shoe is, of course, the same, so that the contact pins and contact socket mesh coaxially.

[0026] In the sectional view according to Fig. Figure 4a shows the coupling plug 2 and the area below the coupling shoe 1. The inner surface 1.5, together with the contact surface 1.4, forms an obtuse angle α2. The sealing element 3 is arranged on the guide surface 2.3 of the coupling plug. According to the embodiment Fig. 4a, left half of the image, shows the plugging surface 2.4 and the guide surface 2.3 forming a right angle. The sealing element, on the other hand, has a triangular cross-sectional shape 3.4, in which a bearing surface 3.2 and a sealing surface 3.3 are formed according to the exemplary embodiment. Fig. 5a, Fig. 5b include an acute angle_α1. The sum of said right angle and acute angle_α1 in turn leads to an orientation of a sealing surface 3.3 of the sealing element 3 at an obtuse angle_α2, such that the orientation of the sealing surface 3.3 corresponds to the alignment of an inner surface 1.5 of the clutch shoe 1.

[0027] In another way, according to an exemplary embodiment Fig. 4a, right side, the angle of the sealing element or its sealing surface 3.3 is reached. In contrast to the left half of the image, the circumferential guide surface 2.3 is angled and forms the aforementioned obtuse angle α2 with the plug-in surface 2.4. The sealing element 3 has, according to the exemplary embodiment, Fig. 5c has a rectangular cross-sectional shape 3.4, so that the sealing surface 3.3 has the same orientation as the inner surface 1.5 which surrounds the longitudinal axis 7.

[0028] The aforementioned positioning ensures that the sealing element 3 only comes into contact with the inner surface 1.5 at the very last moment of the insertion movement when connecting the two coupling pieces 1, 2. The same applies when disconnecting the breakaway coupling. With the first moment of a release movement in the axial direction of the longitudinal axis 7, the contact between the sealing element 3.4, or rather its sealing surface 3.3, and the inner surface 1.5 is broken, so that no friction of the sealing element 3 influences the release force L between the contact pins 1.1 and the contact bushings 2.1.

[0029] Example of implementation Fig. 4b the coupling plug 2 is fully inserted into the coupling shoe 1. At this moment the sealing element 3 or its sealing surface 3.3 is in sealing contact with the inner surface 1.5 (not shown).

[0030] Example of implementation Fig. 4c, the angle of attack of the guide surface 2.3 and the angle of attack of the sealing surface 3.3 are perpendicular. A pair of O-rings is suitable as a sealing element, which, according to the embodiment shown in the left half of the image, are arranged in a groove 3.1 of the guide surface 2.3 of the coupling plug, while in the embodiment Fig. 4c, right half of the image, the O-rings are arranged in a groove 3.1 of the inner surface 1.5 of the coupling shoe 1 or of the rim 1.2.

[0031] In both Fig. 5a, Fig. Figure 5b shows the triangular cross-sectional shape 3.4 of the sealing element 3. According to the exemplary embodiment. Fig. 5a The sealing surface 3.3 of the sealing element 3 has circumferential ridges 3.5 which, in the form of a protrusion, extend over the sealing surface to a significantly smaller contact zone with the inner surface 1.5. This increases the contact pressure for the same plug force. According to the exemplary embodiment Fig. 5b The sealing element 3 has lamellae 3.6 that protrude beyond the sealing surface 3.3. The same applies (not shown) to sealing elements 3 with a rectangular cross-sectional shape 3.4 according to Fig. 5c, where the sealing surface 3.3 is aligned parallel to the bearing surface 3.2.

[0032] Example of implementation Fig. 6 is provided for an electronic component_A, such as a speech unit, and an electronic component_B, such as a communication console. The electronic component_A is connected to a first coupling piece 1 via a connecting cable 4. The second electronic component_B has a second coupling piece 2, which is mounted on a housing 6 of component_B. Thus, component_A can be connected to component_B by means of the breakaway coupling 12 and disconnected by applying a corresponding tensile force or tilting moment. Reference symbol list 1. First coupling piece, coupling shoe 1.1 Contact pin, retaining pin 1.2 Board 1.3 In-depth study 1.4 Contact area 1.5 Interior surface 2 second coupling piece, coupling plug 2.1 Contact socket 2.2 Shoulder 2.3 Guide surface Section 2.3a Section 2.3b Section 2.3c 2.4 Plug-in area 3 Sealing element 3.1 Nut 3.2 Storage area 3.3 Sealing surface 3.4 Cross-sectional shape 3.5 Bead 3.6 Lamella 4 connection cables 4.1 Bend protection 5 Connecting screw 6 Housing of Component_B 7 Longitudinal axis 7.1 Arrow 7.2 Arrow 8.1 Tilting axle 8.2 Tilting axle 12 Breakaway coupling O pair of arrows U Arrow pair Nomenclature a0 distance_a0 a1 Distance_a1 a2 distance_a2 A Component_A B Component_B L Force_L m0 Central axis_m0 s1 axis_s1 s2 axis_s2 T Force_T v Measure_v V Force_V α1 Angle_α1, acute α2 Angle_α2, obtuse QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2010 011 271 B4

[0002] DE 94 00 329 A

[0003]

Claims

Breakaway coupling (12) with a first coupling piece (1) having several contact pins (1.1) and with a second coupling piece (2) to be connected, having corresponding contact sockets (2.1), wherein the first coupling piece (1) is designed as a coupling shoe and has a circumferential rim (1.2) that defines a recess (1.3) within which the contact pins (1.1) are arranged in a contact surface (1.4), wherein the second coupling piece (2) is designed as a coupling plug and has a shoulder (2.2) with a circumferential guide surface (2.3), wherein the shoulder (2.2) defines a plugging surface (2.4) in which the contact sockets (2.1) are arranged, characterized in that a sealing element (3) is provided which can be brought into operative contact when connecting both coupling pieces (1, 2) with the respective coupling piece (1, 2). Breakaway coupling (12) according to claim 1, characterized in that the sealing element (3) is designed as an O-ring and is placed within a groove (3.1) of the inner surface (1.5) of the rim (1.2) or within a groove (3.1) in the guide surface (2.3). Breakaway coupling (12) according to claim 1, characterized in that a) the sealing element (3) is arranged on the rim (1.2) and can be applied sealingly against the guide surface (2.3) when connecting both coupling pieces (1, 2); or b) the sealing element (3) is arranged on the guide surface (2.3) and can be applied sealingly against an inner surface (1.5) of the rim (1.2) when connecting both coupling pieces (1, 2). Breakaway coupling (12) according to claim 3, characterized in that the sealing element (3) has a bearing surface (3.2) and a sealing surface (3.3) wherein a) the sealing element (3) has a triangular cross-sectional shape (3.4), wherein the bearing surface (3.2) and the sealing surface (3.3) enclose an obtuse angle α1 or b) the sealing element (3) has a rectangular cross-sectional shape (3.4), wherein an obtuse angle α2 is enclosed between i) the guide surface (2.3) and the plug-in surface (2.4) or ii) the inner surface (1.5) of the flange (1.2) and the contact surface (1.4). Breakaway coupling (12) according to one of the preceding claims, characterized in that a central axis_m0 is provided which is arranged parallel to a section (2.3a) of the guide surface (2.3) and which has the same distance_a0 to opposite sections (2.3a, 2.3b) of the guide surface (2.3), wherein part of the contact pins (1.1) are designed as retaining pins and part of the contact sockets (2.1) are designed as retaining sockets, wherein at least four retaining pins (1.1) and four retaining sockets (2.1) are provided which are placed along the central axis_m0. Breakaway coupling (12) according to claim 5, characterized in that an axis_s1 is provided which is arranged parallel to the central axis_m0 which has a distance_a1 to the section (2.3a) of the guide surface (2.3) with a1 < a0, wherein at least five contact pins (1.1) or contact sockets (2.1) are provided which are placed along the axis_s1. Breakaway coupling (12) according to claim 5 or 6, characterized in that an axis_s2 is provided which is arranged parallel to the central axis_m0 which has a distance_a2 to the section (2.3a) of the guide surface (2.3) with a2 > a0, wherein at least six contact pins (1.1) or contact sockets (2.1) are provided which are placed along the axis_s2. Breaking coupling (12) according to one of claims 5 to 7, characterized in that at least two contact pins (1.1) or contact sockets (2.1), which are placed along the same axis_m0, _s1, _s2, are arranged offset relative to this axis_m0, _s1, _s2 by a dimension_v. Breakaway coupling (12) according to one of the preceding claims, characterized in that the sealing element (3) has a sealing surface (3.3), wherein the sealing surface (3.3) is profiled. Breakaway coupling (12) according to claim 9, characterized in that the sealing surface (3.3) has circumferential beads (3.5) and / or circumferential lamellae (3.6). Coupling piece (1, 2) of a breakaway coupling (12) according to one of the preceding claims a) with a connecting cable (4) for an electronic component_A and / or b) with a connecting cable (4) and an electronic component_A connected thereto and / or c) mounted on a housing (6) of a connected electronic component_B.

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