Abstract:
A plug-type mount is provided for releasably holding an equipment part such as a panel or an interior trim part on a sub-frame such as a fuselage. The plug-type mount ( 5 ) includes a first holder ( 30 ) and a second holder ( 35 ) which can be fastened to one another with the aid of a holding pin ( 11 ) and a housing ( 20 ), in which the holding pin ( 11 ) can be releasably locked. The holders ( 30, 35 ) carry in each case at least one electrical contact ( 33, 34 ) and are configured in such a way that, in the case of the holding pin ( 11 ) being locked in the housing ( 20 ), the holders ( 30, 35 ) are fastened to one another and the electrical contacts ( 33, 34 ) are connected electrically. Excessive cable lengths can be avoided by the preferable use of the plug-type mount ( 5 ) in an airplane because the electrical connection is also produced and disconnected as the mechanical connection is produced and disconnected.

Description:
BACKGROUND 
     The invention relates to a plug mount for a detachable fastening of an equipment part, such as a panel or an interior trim part to a sub-frame, such as an airplane fuselage, comprising a mounting pin, having at one end a groove for fastening a mounting pin and at the other end an elastic, washer shaped damper for damping oscillations and for assembling the mounting pin, which is arranged on the mounting pin between a mounting washer and an axially displaceable glide washer, and having a housing in which a spring pre-stressed slide is supported, which can be displaced by inserting the mounting pin into an opening of the housing against the spring pretension and subsequently it can latch in the groove of the mounting pin due to the spring pretension, with either the damper or the housing being assembled to the equipment part and the other one of the damper or housing being assembled to the sub-frame. 
     Such a plug mount forms the subject of a former, not preliminarily published German application No. 10 2007 061 926.1 (in the following called the earlier application) of the applicant. 
     In the cabin development of modern airplane types, such as Airbus A350, for example, it is attempted to design elements to be mounted to the airplane fuselage, such as toilets, board kitchens, passenger seats, cabin networks, cabin lighting, and air jets, as respectively complete cabin modules, with all connections being embodied as flexible standardized interfaces, if possible, and using simplified fastening concepts, allowing assembly and disassembly without the use of any tools (cf. the essay “Cabin customization—New approach for A350”, magazine One, German issue, Dec. 18, 2006, page 23.) Additionally it shall be possible to reconfigure an existing design solution on short notice, for example the cabin equipment for a long-distance flight, and prepare the cabin equipment for a short-distance flight. The standardized interfaces shall here be applicable equally for all aircraft categories. Additionally, it shall be ensured that the standardized interfaces securely prevent any rattling noise of the components connected to each other. 
     The subject of the earlier application comprises a plug, a fastener, and a plug fastener being a combination of such a plug and fastener, known for example from the utility patent DE 299 20 497 U1, which are to be improved such that at least one of the above-mentioned problems can be solved. The connection achieved with the plug fastener according to the earlier application can be implemented and released in a simple fashion, because a precise mutual alignment of the two components to be connected is not necessary during the assembly. Furthermore, tools are not necessary, either for the assembly or for disassembly, because the creation of the connection occurs by a simple insertion according to the principle “plug and play” or “snap and click.” The release of the connection can occur, for example, via an eccentric lever pressing against the spring pre-stressed slide or simply by a finger pushing against a particular handle, in order to push the slide against the spring pre-tension to such an extent that the fastening pin is released. 
     When in an airplane a panel, which may carry parts of the electric system, is rotated down from the ceiling or an inner panel in the manner of a flap, the cables connected together with the other equipment parts on the panel have to follow the path of the panel. In order for the cables to not hinder the movement of the panel the cables connected to the panel must comprise a certain excessive length. In an airplane in which the length of the installed cables amounts to many kilometers the above-mentioned excessive length of cables leads to an undesired additional weight, which might amount to several hundred kilograms. When a panel is to be released from the ceiling or the inner cover panel it is additionally necessary to separate electric plug connections, which later require manual reconnection during the reassembly of the panel. The plug connection according to the former application is embodied as a flexible standardized interface, however the assembly and disassembly of a panel or the like is enabled without the use of any tools, yet, it is not embodied such that it avoids excess cable lengths and the problems connected thereto. 
     SUMMARY 
     The object of the invention is to further develop a plug fastener of the type mentioned at the outset such that the above-mentioned problems are avoided, particularly the excessive length of cables and the problems caused thereby. 
     This object is attained according to the invention in that in a plug fastener of the type mentioned at the outset, on a housing a first fastener is provided and the glide washer is embodied as a part of a second fastener, with the fasteners each carry at least one electric contact and are embodied such that the fasteners are fastened to each other in any fastening pin held in the housing and the electric contacts are electrically connected. 
     Contrary to the mechanic plug fastener according to the earlier application the plug fastener according to the invention is an electromechanical plug fastener, which allows simultaneously to the assembly and disassembly of an equipment part, such as a panel to a sub-frame, to create or separate an electric connection. Here, it is only necessary to connect two cables with the electric contacts of the two fasteners provided according to the invention. The electric connection of the electric contacts is established by the insertion of the fastening pin into the housing of the first fastener and separated by pulling the fastening pin from the housing. It is not necessary for the electric connection of the cables with the electric contacts to be separated during the assembly and disassembly of a panel, therefore it is not necessary for them to be manually accessible for separation. Therefore the cables only require their minimum length, i.e. no excess length. Previously, it was necessary to open the panels to such an extent that an electric cable plug connection was accessible to be separated manually. This separation process (and analogously the process of connecting) occurs in the electro-mechanic plug fastener according to the invention only between the electric contacts of the two fasteners and additionally already at the very moment the mechanic connection is separated (and/or established) between the fastening pin and the first fastener. The excessive lengths are omitted because after the separation of the first fastener and the fastening pin no electric connection remains requiring accessibility to be manually separated. Although in prior art it is necessary first to create or to separate a mechanic connection and subsequently also an electric cable connection, which particularly requires plug connections and additional cable lengths, in the plug fastener according to the invention the mechanical and electric connection/separation between the fasteners, on the one side, and their electric contacts, on the other side, occurs in a single step. 
     Advantageous embodiments of the invention are provided in the dependent claims. 
     In an embodiment of the plug fastener according to the invention at least one of the fasteners carries at least one connection contact for establishing an electric connection between electric contacts. The connection contact facilitates the establishment of an electric connection and facilitates the construction of the electro-mechanical plug fastener according to the invention. Additionally, it facilitates the assembly of the electro-mechanical plug fastener according to the invention, because the connection contact will always be located at the correct position to allow accepting or contacting the electric contact of the other fastener. 
     In another embodiment of the plug fastener according to the invention, the electric contacts at each fastener can each be accepted in a contact housing and be connected to an input or output cable. The use of the contact housing leads to a further simplification of the design of the electro-mechanical plug fastener according to the invention and the cable connections. 
     In another embodiment of the plug fastener according to the invention, one of the two electric contacts and the connection contact are embodied in one piece. This renders the establishment of the electric connection between the electric contacts even safer and thus further facilitates this. 
     In another embodiment of the plug fastener according to the invention, the groove of the fastening bolt comprises two radially embodied lateral groove walls. This allows a lasting hold of the connection established between the fastening pin and the spring pre-stressed slide as long as the slide is not operated against the direction of the spring pre-tension. When the groove fails to extend over the entire circumference of the fastening pin the separation of the connection can easily occur by rotating the fastening pin, which can be pulled out of the housing as soon as the slide has left the groove. 
     In another embodiment of the plug fastener according to the invention, the first fastener is mounted to the housing via a slide connection. Due to the slide connection the connection between the housing and the first fastener can be easily established and separated. 
     In another embodiment of the plug fastener according to the invention, the first fastener comprises a bore aligned to the opening of the housing. The opening of the housing can therefore be sized such that any precise alignment of the bore and the opening of the fastening pin and the first fastener is not necessary during the assembly. 
     In another embodiment of the plug fastener according to the invention, the fastening washer of the second fastener can be supported or is supported on a stop of the fastening pin and the slide washer part of the second fastener can be supported or is supported on a shoulder formed on the fastening pin. Therefore, the damper can easily be assembled on the fastening pin. 
     In another embodiment of the plug fastener according to the invention, the fastening washer represents an annular flat spring supported on the damper with flat spring arms projecting inwardly and the stop represents an annular groove, in which the flat spring arms are supported with their free ends. This facilitates the assembly of the damper on the end of the fastening pin allocated thereto, with first the damper being fastened at an equipment part or the sub-frame. 
     In another embodiment of the plug fastener according to the invention, the glide washer part is formed at the second fastener. The second fastener and the glide washer part, acting in the function of the originally separate glide washer, are therefore embodied in one piece. Due to this one-piece embodiment, the second fastener can be produced in a simple fashion, for example as an injection molding part made from plastic in a single processing step. The same applies to the first fastener and at least the upper part of the housing connected thereto. Due to the fact that such a housing already exists the above-mentioned embodiment of an existing slide connection between the housing and the first fastener is the most beneficial method to connect them to each other. Alternatively, the first fastener could also be produced in a single processing step, at least with regard to the upper part of the housing. 
     In another embodiment of the plug fastener according to the invention, a bearing socket is formed on the glide washer part of the second fastener at the side facing away from the shoulder around a bore accepting the fastening pin, with the second fastener being supported on the fastening pin in an axially displaceable fashion and with the damper being supported on the second fastener. This embodiment improves the support of the second fastener on the fastening pin without interfering with the simple production of the one-piece second fastener because the bearing socket represents only one additional part formed on the second fastener. 
     In another embodiment of the plug fastener according to the invention, the axial distance between the shoulder and the fastener washer is selected such that the damper is pressed by the fastening washer against the second fastener. This ensures that in the closed status of the plug fastener, the damper is slightly compressed in the axial direction such that in a simple fashion an arbitrary pressure can be upheld over an extended period of time in the connection between the fastening pin and the second fastener. This safely avoids any play and thus also any rattling noise. 
     In another embodiment of the plug fastener according to the invention the fastening pin conically tapers from the shoulder at the side facing away from the fastening washer within the thickness of the first fastener and can be accepted or is accepted in a correspondingly conical bore of the first fastener in a play-free fashion. This way the fastening pin can be held securely and without play in the bore of the first fastener. 
     In another embodiment of the plug fastener according to the invention, the opening in the housing is a bore or an oblong bore. Particularly in case the opening is an oblong bore, the fastening pin can be inserted into the housing without requiring the bore in the first fastener and the opening in the housing to be precisely aligned to each other. 
     In another embodiment of the plug connection according to the invention, an eccentric lever serves to unlock the fastening pin by displacing the slide against the spring pre-tension. With the help of the eccentric lever, a defined unlocking position of the spring pre-stressed slide can be ensured. Additionally, the plug fastener can easily be released with the help of the eccentric lever. 
     In another embodiment of the plug fastener according to the invention, means are provided to fasten the housing to the equipment part or the sub-frame. When the housing is mounted to the equipment part or the sub-frame, if necessary, the first fastener can be exchanged for another one in a simple fashion, for example electric contacts having a different geometry. 
     In another embodiment of the plug fastener according to the invention, a connecting aid mounted to the damper is provided to fasten the second fastener to the equipment part or sub-frame. Using such a connecting aid the second fastener can be fastened to an equipment part or to the sub-frame in a simple fashion or be separated therefrom, if necessary. 
     In another embodiment of the invention, the electric contacts are embodied as spring contracts, plug contacts, or similar contacts. This allows the selection of contacts suitable for each purpose of use. 
     In the following, exemplary embodiments of the plug fastener according to the invention and exemplary embodiments of the plug fastener according to the earlier application are explained in greater detail with reference to the drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Shown are: 
         FIG. 1  is a longitudinal cross-sectional view of a first preferred embodiment of a plug fastener according to the invention in a status in which a mechanical and an electric connection can be created and secured between two fasteners for electric contacts, 
         FIG. 2  is an exploded view of the plug fastener according to  FIG. 1  in a state, in which the mechanical and the electric connection are separated, 
         FIG. 3  is a perspective view of the plug fastener according to the invention in a connected state shown in  FIG. 1 , 
         FIG. 4  is a view of the plug fastener according to the invention in another embodiment in a state according to  FIG. 2 , in which the parts to be mechanically connected and the part to be electrically connected are arranged over top of each other, though, 
         FIG. 5  is an exploded isometric view of an embodiment of the plug according to the invention, 
         FIG. 6  is an exploded isometric view of an embodiment of the fastener according to the invention, 
         FIG. 7  is a side view of an exemplary embodiment of the plug fastener according to the invention in the locked state, 
         FIG. 8  is a cross-sectional view according to the line VIII-VIII in  FIG. 7 , 
         FIG. 9  is a cross-sectional view according to the line IX-IX in  FIG. 8 , 
         FIG. 10  is a view of the plug fastener similar to  FIG. 7 , however in the unlocked state, 
         FIG. 11  is a cross-sectional view according to the line XI-XI in  FIG. 10 , 
         FIG. 12  is a cross-sectional view according to the line XII-XII in  FIG. 11 , 
         FIG. 13  is a view of the plug fastener according to  FIG. 7 , however in the normal state without any engagement of the fastening pins in the fastener, 
         FIG. 14  is a side view according to the line XIV-XIV in  FIG. 13 , and 
         FIG. 15  is a side view according to the line XV-XV in  FIG. 14 . 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     For a better understanding of the invention, first exemplary embodiments of the plug, the fastener, and the plug fastener according to the earlier application of the applicant are described in greater detail with reference to the attached  FIGS. 5-15 . This is followed by a detailed description of exemplary embodiments of the plug fastener according to the invention using  FIGS. 1-4 . 
     An embodiment of a plug fastener according to the earlier application, marked  150  in its entirety, is shown in various views in  FIGS. 7-15  in the locked and unlocked state, which is discussed in greater detail in the following. The plug fastener  150  serves for a releasable fastening of an equipment part  152  to a sub-frame  154 . The equipment part  152  can represent the inner cover of the cabin of an airplane, for example. The sub-frame  154  may be the aircraft fuselage, for example. Alternatively, they could represent appropriate parts of a motor vehicle. The plug fastener  150  comprises a plug, in its entirety marked  110  and shown in detail in  FIG. 5 , and a fastener, in its entirety marked  130  and shown in detail in  FIG. 6 , which are now described in detail. 
       FIG. 5  shows an exemplary embodiment of the plug  110  according to the earlier application in an exploded isometric view. The plug  110  comprises a fastener pin  112 , a glide washer  114 , a washer-shaped damper  116 , a fastening washer  118 , and an annular spring or cir-clip  120 . The damper comprises an elastic material, e.g., an elastomer. It serves to dampen oscillations and to assemble the plug  120  to the sub-frame  154 . One end of the fastening pin  112  is embodied as a spherically rounded dome  122 . Adjacent to the dome  122 , the fastening bolt  112  has a recess representing an annular groove  125  with two radially embodied lateral groove walls  124  and  126 . Adjacent thereto, the fastening pin  112  comprises a conically expanding shaft section  121  such that a shoulder  123  is formed at the fastening pin  112 . Here, the conical embodiment of the shaft section  121  is not critical, though. The shaft section  121  may simply be embodied cylindrically as well, however enlarged in its diameter in reference to the shaft section  127 , as shown in  FIGS. 7-15 . The glide washer  114  is supported on the shoulder  123 . The fastening washer  118  is supported on one side on the annular spring  120  and on the other side on the damper  116 . The damper  116  is supported on one side with its bottom on the glide washer  114 . When the damper  116 , the glide washer  114 , the fastening washer  118 , and the cir-clip  120  are assembled on the fastening pin  112 , the glide washer  112  is supported on the shoulder  123  and all above-mentioned parts mutually contact each other. When pressure is applied to the upper end of the fastening pin  112 , as seen in  FIG. 5 , while the plug  110  with the glide washer  114  is supported on the fastener  130 , the glide washer  114  moves to such an extent as the elastically compressive damper  116  is compressed, over a shaft section  127 , having a smaller diameter than the shaft section  121 , axially upward in the direction towards the cir-clip  120 , here forming a stop for the fastening washer  118  and preventing its upward motion. In order to disassemble the parts arranged on the shaft section  127 , the cir-clip  120  can be released by pulling it out of a groove  128  at the end of the shaft section  127 . The annular groove  125  of the fastening pin  112  can be made to engage a clip in order to assemble the plug  110  in the fastener  130 , which in the following is described in greater detail with reference to  FIG. 6 . 
       FIG. 6  shows in an exploded isometric view an embodiment of the fastener  130  according to the earlier application. The fastener  130  has a housing  132 , in which the slide  134  is supported, pre-stressed by the above-mentioned clip. The housing  132  has a central opening  133 , which is embodied as an oblong hole in the exemplary embodiment shown. The opening  133  could also be embodied simply as a bore. The opening  13  completely penetrates the housing  132 , which is easily discernible in  FIG. 6 . The slide  134  is supported in a recess  138  of the housing  132  that opens laterally. The slide  134  has an opening  135 , which can be aligned with the opening  133  of the housing  132 . At the sides, the slide  134  is provided with two shoulders  139   a ,  139   b , by which it is supported on two helical springs  140   a  and/or  140   b , arranged in the recess  138  of the housing  132 , as best discernible in  FIGS. 8 ,  11 , and  14 , which is discussed in greater detail in the following. The opening  135  of the slide  134  has an edge  137  that can engage the annular groove  125  of the fastening pin  112 . The edge  137  is constantly pre-stressed in the direction of a lateral housing opening of the recess  138  due to the pre-tension of the helical springs  140   a ,  140   b . In the lateral housing opening of the recess  138 , a stop  141  is provided for an eccentric lever  142  to unlatch the fastener  130  by shifting the slide  134  against the spring pre-tension applied by the helical springs  140   a ,  140   b . The eccentric lever  142  cooperates with the stop  141  according to the illustration in  FIG. 11  or with a stop  143  according to the illustration in  FIG. 14 . For this purpose the eccentric lever  142  is pivotal in the housing  132  around a pin  144 . 
     The stop  141  at the housing and the eccentric lever  142  are embodied such that, when both of them mutually contact, the opening  133  of the housing  132  and the opening  135  of the slide  134  are aligned to each other, as discernible in  FIG. 11 . Further, the stop  143  at the housing  132  and the eccentric lever  142  are embodied such that when they mutually contact the opening  133  of the housing  132  and the opening  135  of the slide  134  are off-set in reference to each other as discernible in  FIGS. 8 and 14 . Two bores  145   a ,  145   b  in the exemplary embodiment shown and two counter-sunk screws  146   a ,  146   b  are used to fasten the housing  132  to the equipment part  152 . When the fastening pin  112  is inserted into the opening  133  of the housing, the end of the fastening pin, provided with the dome  122 , displaces the slide  134  against the spring pre-tension and subsequently it latches in the annular groove  125  of the fasting pin  112  by the spring pre-tension, which in the following is explained in greater detail with reference to  FIGS. 7-15 . 
     A plug fastener shown here, marked  150  in its entirety, represents a combination of the plug  110  and the fastener  130 . According to the illustration in  FIG. 15  the arrangement is designed such that a distance a between the annular groove  125  of the fastening pin  112  and a bottom of the glide washer  114  of the fastening pin or the bottom of an equipment part (not shown) arranged under the glide washer  114  on the fastening pin  112  facing the annular groove  125  is selected smaller than a distance α′ between a facing top of the slide  124  and a support surface  147  of the housing  132 , on which the bottom of the slide washer  114  or the equipment part (not shown) come to rest, such that in the locked state the plug fastener  150  of the damper  116  is slightly compressed in the axial direction. The path by which the damper  116  is compressed here, may amount to 0.4 mm, for example. Although the plug  110  remains displaceable in reference to the fastener  130 , however it is subject to the pre-tension of the damper  116  such that any noise development is prevented by the two parts  152  and  154  connected to each other by the plug fastener  150 . 
       FIG. 7  shows a side view of an exemplary embodiment of a plug fastener  150  according to the earlier application in the locked state, in which the slide  134  with the edge  137  of the opening  135  is latched in the annular groove  125  of the fastening pin  112 . It is discernible in  FIG. 7  that the frame  154  is accepted in a form-fitting fashion in the edge of a bore in the circumferential groove  117  of the damper. The fastener  130 , as described above, is fastened with its housing  132  via the counter-sunk screws  146   a ,  146   b  at one side of the equipment part  152 . The type of locking between the slide  134  and the fastening pin  112  is clearly discernible in  FIG. 8 , which represents a cross-sectional view according to the line VII-VII in  FIG. 7 , and in  FIG. 9 , which is a cross-sectional view according to a line IX-IX in  FIG. 8 . 
       FIGS. 10-12  show the unlocked state, in which the fastening pin  112  can be disassembled. In  FIG. 10  the plug fastener  150  is shown similar to  FIG. 7 , however in the unlocked state.  FIG. 11  is a cross-sectional view according to a line XI-XI in  FIG. 10 , and  FIG. 12  is a cross-sectional view according to the line XII-XII in  FIG. 11 . In the locked state, according to the illustration in  FIG. 8 , the eccentric lever  142  is pivoted downward and contacts the stop  143 . However, in  FIG. 11  the eccentric lever  142  is pivoted upward and contacts the stop  141 . 
     In  FIGS. 13-15  the normal state of the plug fastener is shown, in which the fastening pin  112  is not inserted into the housing  132 , which is clearly discernible in  FIG. 13 , showing an illustration of the plug fastener  150 , as seen in  FIG. 7 , however in the normal state.  FIG. 14  is a cross-sectional view according to the line XIV-XIV in  FIG. 13 , and  FIG. 15  is a cross-sectional view according to the line XV-XV in  FIG. 14 . In the normal state, similar to the locking state, the eccentric lever  142  contacts the stop  143  as discernible in  FIG. 14 . 
     The unlatched state according to  FIGS. 10-12  could be adjusted with a simple handle  149  (only shown in  FIG. 14  in a dot-dash line) instead of an eccentric lever, such as the eccentric lever  142 . The handle  149  would contact or be formed on the slide  134  and by operation via a pushing finger bring the slide  134  into the position shown in  FIGS. 10-12 . 
     An embodiment of a plug fastening according to the invention, in its entirety marked  5 , is shown in various views in  FIGS. 1 through 3 , namely in  FIGS. 1 and 3  in a state in which a mechanical and an electric connection is established and fixed, and in  FIG. 2  in an illustration shown exploded in a state in which the mechanical and the electric connections are separate. The plug fastening  5  serves for a detachable fastening of an equipment part (not shown) to a sub-frame (not shown, either.) For example, the equipment part may represent the inner cover of the cabin of an airplane or a panel in general. The sub-frame may be an airplane fuselage, for example. It may also represent equivalent parts of a motor vehicle. The plug fastening  5  essentially comprises a fastening pin  11  that can be fixed, for detachably connecting a first fastener  30  and a second fastener  35  to each other, each of which carrying electric contacts  33  and/or  34 , between which an electric connection shall be established when the plug connection is in the locked state shown in  FIG. 1 . This is described in detail in the following. 
     According to  FIG. 1 , the fastening pin  11  has a groove  24  at one end, which in the exemplary embodiment shown represents an annular groove. The groove  24  comprises two radially embodied lateral groove walls  24   a ,  24   b . The groove  24  serves to fix the fastening pin  11  in a housing  20 , to be explained in greater detail in the following. At its other end the fastening pin  11  comprises an elastic washer-shaped damper  15  to dampen oscillations and to assemble the fastening pin  11 . The damper  15  is arranged on the fastening pin  11  between a fastening washer  26  and an axially displaceable glide washer part  27  of the second fastener  35 . The fastening washer  26  and the glide washer part  27  are supported on a stop at the fastening pin  11  and/or at a shoulder  28  formed at the fastening pin  11 . The stop is formed by an annular groove  29  embodied at one end of the fastening pin  11 . The fastening washer  26  is a circular flat spring supported on the damper  26  with arms  26   a  of the flat spring projecting inwardly and discernible in  FIGS. 2 and 3 . In the illustration in  FIG. 1 , the arms of the flat springs extend from the circular flat spring diagonally upwards and are supported with their free ends in the annular groove  29 . 
     A spring pre-stressed slide  22  is supported in the housing  20 , displaceable by the insertion of the fastening pin  11  into an opening  37  of the housing against the spring pre-tension and subsequently it can latch in the groove  24  of the fastening pin. The first fastener  30  is mounted at the housing  20 . In the exemplary embodiment shown the first fastener  30  is mounted on the housing  20 , namely via a slide connection  60 . For this purpose, the housing  20  comprises two grooves located on opposite sides, engaged by two projections  61  and/or  62  protruding inwardly and downward from the bottom of the housing  20 . In the illustrations in  FIGS. 1-3 , the first fastener  30  extends from the housing  20  towards the right like a cantilever. The first fastener  30  has a bore  36 , which is aligned to the opening  37  of the housing  20  when the housing  20  is inserted into the first fastener  30  and is located in the position shown in  FIGS. 1 and 3 . 
     As discernible in  FIGS. 1-3 , the second fastener  35  is embodied similar to the first fastener  30 , however, at its left end, seen in the illustration in  FIGS. 1-3 , it comprises the already-mentioned glide washer part  27  instead of a housing acceptance part, which replaces the conventional glide washer. At the glide washer part  27 , at the side facing away from the shoulder  28  of the fastening pin  11 , a bearing socket  32  is formed around a bore  31  of the second fastener  35  accepting the fastening pin  11 . The second fastener  35  is supported on the fastening pin  11  in a rotatably and axially displaceable fashion together with the glide washer part  27  and the bearing socket  32 . The damper  15  encompasses the bearing socket  32  and is supported on the glide washer part  27  of the second fastener  35 . The axial distance between the shoulder  28  and the fastening washer  26  is selected such that the damper  15  is pressed elastically against the second fastener  35  by the elastically embodied fastening washer  26 . 
     During the assembly, the second fastener  35  with the bearing socket  32  is pushed onto the fastening pin  11  until contacting the shoulder  28  of the fastening pin  11 . Then the damper  15  is pushed onto the exterior of the bearing socket  32 . Finally, the damper  15  and the fastening washer  26 , preferably comprising a rubber material, are compressed until the arms of the flat spring  26   a  latch in the annular groove  29  and thus hold the second fastener  35  elastically pre-stressed on the shoulder  28 . 
     The damper  15  and thus the second fastener  35  can be connected to an equipment part or the sub-frame via the connection aid  90 . The connection aid  90  can be fastened, for example via screws or rivets, for which it is provided with bores discernible in  FIGS. 2 and 3 . The first fastener  30  can be fastened to the equipment part or the sub-frame via means, not shown. The above-mentioned means may represent screws or rivets, with the housing  20  showing two opposite penetrating bores, of which only one being visible in  FIGS. 2 and 3 . 
     In  FIG. 1  it is discernible that the fastening pin  11  conically tapers at the side facing away from the fastening washer  26  beginning at the shoulder  28  within the thickness of the first fastener  30 , comprising in this section a second fastener  35  underneath the glide washer part  27 , and is accepted without play in a correspondingly conical bore  38  of the first fastener, fixed as soon as the fastening pin  11  is placed in the housing  20  as shown. The opening  37  in the housing  20  is preferably an oblong hole, which is shown in  FIG. 1  in a cross-section, thus it extends in its longitudinal direction perpendicular in reference to the level of the drawing. The fastening pin  11  can be unlatched by an eccentric lever  41 , by way of shifting the slide  22  (in the illustration in  FIG. 1  toward the right) against the pre-tension applied by the springs  42 , with only one of them being discernible in  FIG. 1 . The first and the second fastener  30 ,  35  can easily be separated from each other when the fastening pin  11  is unlatched. 
     In the exemplary embodiment shown here, the two fasteners  30 ,  35  each have several electric contacts  33  and/or  34 . The fasteners  30 ,  35  are furthermore each embodied such that when the fastening pin  11  is fixed in the housing  20  the fasteners  30 ,  35  are mounted to each other and the electric contacts  33  of the first fastener  30  are electrically connected to the electric contacts  34  of the second fastener  35 . In the exemplary embodiment described here, a connection contact  50 , at which the first fastener is mounted, serves to establish the electric connection between the electric contacts  33 ,  34  as best discernible in  FIG. 2 . The electric contacts  33  of the first fastener  30  are spring contacts, located in a contact housing  40  such that it projects out of the contact housing  30  to the front in the direction towards the connection contact  50 . Accordingly, the second fastener  35  carries a contact housing  45 , in which the electric contacts  34  are also embodied as spring contacts, housed such that they project towards the front from the contact housing  45 . These spring contacts may represent those of the company Compagnie Deutsch, 9250 Rueil-Malmaison, France. Suitable are spring contacts of the type, by the company Deutsch called sliding contact connectors each and distributed under the trademark 3C®. The corresponding flyer Deutsch, Sliding Contact Connector Automotive Connector System, A Step Ahead, has been published before the priority date of the present application. However, no publishing date is known to the applicant. At their opposite ends the electric contacts  33 ,  34  are connected to an input cable  80  and/or an output cable  85 . When the first and the second fastener  30 ,  35  are connected to each other, i.e. are in a position shown in  FIGS. 1 and 3 , the contact housings  40 ,  45  are essentially located on top of each other. The projections  43 , formed at the bottom of the second fastener  35 , with only one of them being visible in  FIGS. 2 and 3 , engage two corresponding recesses  44  in the first fastener  30  when the plug fastener  5  is closed. This ensures that the electric contacts  33 ,  34  remain in an electric contact to the connection contact  50  under spring pre-tension as long as the plug connection is set to the position shown in  FIG. 3 . The electric contacts  33  or the electric contacts  34  may each be produced in one piece with the connection contact  50 . Further, the electric contacts  33 ,  34  may be embodied as plug connectors or similar contacts. 
     In  FIG. 4  another exemplary embodiment of the plug fastener according to the invention is shown in the state according to  FIG. 2 , however, here the parts to be connected mechanically and the parts to be connected electrically, i.e. the first fastener  30  and the second fastener  35  on the other side and the contact housing  40  and the contact housing  45  on the other side are arranged over top of each other. Further, for reasons of space, the contact housing  40 ,  45  are each divided into two partial housings, as discernible at the contact housing  40  at the bottom of  FIG. 4 . Accordingly the connection contact  50  is embodied in two parts, as also discernible in  FIG. 4 . In order to release the plug connection according to  FIG. 4  only the eccentric lever  41  must be operated, similar to the first exemplary embodiment according to  FIGS. 1 through 3 . 
     LIST OF REFERENCE CHARACTERS 
     
         
           5  Plug connection 
           11  Fastening pin 
           15  Damper 
           20  Housing 
           21  Penetrating bore 
           22  Slide 
           24  Groove 
           24   a ,  24   b  Lateral walls of grooves 
           25  Washer 
           26  Fastening washer 
           26   a  Arms of flat spring 
           27  Glide washer part 
           28  Shoulder 
           29  Annular groove (stop) 
           30  First fastener 
           31  Bore 
           32  Bearing socket 
           33  Electric contact 
           34  Electric contact 
           35  Second Fastener 
           36  Bore 
           37  Opening 
           38  Conical bore 
           40  Contact housing 
           41  Eccentric lever 
           42  Spring 
           43  Projection 
           44  Recess 
           45  Contact housing 
           50  Connecting contact 
           60  Slide connection 
           61  Projection 
           62  Projection 
           80  Input cable 
           85  Output cable 
           90  Connection aid 
           110  Plug 
           112  Fastening pin 
           114  Glide washer 
           116  Damper 
           117  Circumferential groove 
           118  Fastening washer 
           120  Cir-clip 
           121  Shaft section 
           122  Dome 
           123  Shoulder 
           124  Lateral wall of the groove 
           125  Annular groove 
           126  Lateral wall of the groove 
           127  Shaft section 
           128  Groove 
           130  Fastener 
           132  Housing 
           133  Opening 
           134  Slide 
           135  Opening 
           137  Edge 
           138  Recess 
           139   a, b  Shoulders 
           140   a, b  Helical compression spring 
           141  Stop 
           142  Eccentric lever 
           143  Stop 
           144  Pin 
           145   a, b  Bore 
           146   a, b  Counter-sunk screws 
           147  Support surface 
           149  Handle 
           150  Plug fastener 
           152  Equipment part 
           154  Sub-frame