Coupling half of an electrical plug comprising a multi-part rotatable sleeve, and electrical plug and method

Abstract

An aspect of the invention relates to a first coupling half part (1) for an electrical plug (2), which is configured for coupling to a second coupling half part (3) of the electrical plug (2), comprises a housing (4) and comprises a contact carrier (7) for an electrical contact, the contact carrier (7) being arranged in the housing (4), and comprises a sleeve (8) which is separate from the housing (4) and arranged on the housing (4) so ​​as to be rotatable without threads, wherein the sleeve (8) forms a connector (8a) of the first coupling half part (1) for connecting to the second coupling half part (3), wherein the sleeve (8) comprises an outer sleeve (9) which is rotatably arranged on the housing (4) without threads, and the sleeve (8) comprises an inner sleeve (15) which is separate from the outer sleeve (8), wherein the inner sleeve (15) is arranged on the outer sleeve (9) and the inner sleeve (15) is movable relative to the housing (4) and relative to the outer sleeve (9) in the direction of a longitudinal axis (A) of the first coupling half part (1). One aspect relates to an electrical plug (2). One aspect relates to a method.

Description

Technical Field

[0001] One aspect of the present invention relates to a coupling half-part for an electrical plug. The coupling half-part is configured for coupling to other coupling half-parts of the electrical plug. The coupling half-part comprises a housing. Furthermore, the coupling half-part comprises a contact carrier for an electrical contact. The contact carrier is arranged in the housing. Furthermore, the coupling half-part comprises a sleeve separated from the housing. The sleeve is rotatably arranged on the housing without threads. The sleeve forms a connector to connect the coupling half-part to other coupling half-parts. Other aspects of the present invention relate to an electrical plug having two separate coupling half-parts, which can be coupled to each other. Furthermore, the present invention relates to a method for coupling a first coupling half-part of an electrical plug to a second coupling half-part of an electrical plug. Background Art

[0002] A plug connector coupling is known from DE 10 2005 026 148 B4. Therein, an electrical plug comprises two separate coupling halves. They are coupled to each other in a non-destructively releasable manner. A first coupling half has a housing. A one-piece sleeve is arranged on the housing so as to be rotatable. The sleeve and the housing are arranged to be fixed relative to each other in the direction of the longitudinal axis of the first coupling half. However, the sleeve can be rotated relative to the housing about the longitudinal axis. To connect the two coupling halves, they are guided in the direction of the longitudinal axis and thus axially enter each other. For this purpose, the front of the second coupling half is pushed into the sleeve. The electrical plug comprises a quick locking device. The quick locking device comprises radially inwardly oriented strips arranged on the sleeve. When the two coupling halves are brought together axially, these strips engage behind a locking mechanism. These locking mechanisms are formed on the outside of the front of the second coupling half. These locking mechanisms are strips, which are oriented azimuthally about the longitudinal axis. Once the sleeve is rotated, a relative movement of the radial strips on the sleeve relative to these locking mechanisms is also achieved. Since the strips directly contact the locking mechanisms, an axial pulling of the two coupling halves towards each other occurs. This is the case because the locking mechanisms have inclined contact surfaces along which the strips of the sleeve are guided if the sleeve is rotated in the azimuthal direction. Thus, a locked state of the two coupling halves is then achieved.

[0003] However, in this embodiment, azimuthal tolerances may occur. This may result in the coupling end state between the coupling halves not being finally achieved. This is the case if the sleeve is not rotated far enough around the longitudinal axis to actually achieve the complete coupling end state or end position.

[0004] The object of the invention is to provide a coupling half of an electrical plug which has an improved arrangement with respect to the sleeve and which allows an improved realization of a coupled end state once coupled to the other coupling half of the electrical plug. The object is in particular to at least reduce the azimuthal tolerance of the end position with respect to the rotation of the sleeve to realize the coupled end position of the two coupling halves. This means that, for the electrical plug, the coupled end state between the two coupling halves should be realized safely.

[0005] This object is achieved by a coupling half, an electrical plug and a method for coupling two coupling halves. Summary of the invention

[0006] One aspect of the present invention relates to a coupling half of an electric plug. The coupling half is configured to be coupled to other coupling halfs of the electric plug that are separate therefrom. The coupling half has a housing. In addition, the coupling half includes a contact carrier for an electrical contact. The contact carrier is particularly configured to be separate from the housing. The contact carrier is arranged in the housing. In addition, the coupling half has a sleeve that is separate from the housing. The sleeve is rotatably arranged on the housing without threads. This means that the sleeve is held or arranged on the housing without threads. However, the sleeve is arranged on the housing so that it can be rotated relative to the housing around the longitudinal axis of the coupling half. The sleeve forms a connector of the coupling half to be directly connected to other coupling halfs. In particular, the sleeve is thus a component that enables direct connection with other coupling halfs.

[0007] The sleeve comprises an outer sleeve. The outer sleeve is rotatably arranged on the outer shell without thread. In particular, it is directly arranged on the outer sleeve. The sleeve also comprises an inner sleeve, which is separated from the outer sleeve. The inner sleeve is also a component separated from the outer shell. The inner sleeve is arranged on the outer sleeve. The inner sleeve is received in the outer sleeve. The inner sleeve is observed in the direction of the longitudinal axis of the coupling half part relative to the outer shell and is movable relative to the outer sleeve. Therefore, it is arranged in the outer sleeve to be movable in the axial direction (direction of the longitudinal axis). Therefore, in the proposed coupling half part, the sleeve is configured as a multi-part component. It comprises two separate parts, namely the outer sleeve and the inner sleeve arranged therein. The inner sleeve is particularly configured to be directly connected to the second coupling half part according to the intended use.

[0008] By means of such a concept, it is helped to improve the coupling with the second coupling half. In particular, it is helped to improve the reaching of the azimuthal final position of the sleeve. Thus, the azimuthal tolerance during the rotation of the sleeve can be at least reduced. Thus, reaching the coupling final state between the coupling half parts can be achieved in an equally improved manner. Thus, the coupled state is reached and also maintained.

[0009] In an advantageous embodiment, it is envisaged that a guide is configured between the outer sleeve and the inner sleeve. The axial relative movement between the outer sleeve and the inner sleeve is guided by the guide. By means of the guide, the relative movability of the highly accurate concept between the outer sleeve and the inner sleeve is thereby facilitated. This is particularly advantageous in the axial coupling of two coupling half parts. Undesirable tilting of the inner sleeve is thus avoided. Blocking and / or jamming of the outer sleeve or the inner sleeve is thus avoided. This also advantageously promotes the improved reaching of the coupling final position of the two coupling half parts, because thus, the outer sleeve can also be rotated around the longitudinal axis in an improved manner, so that the azimuth rotation final position can be reached in a limited and safe manner.

[0010] In an advantageous embodiment, it is contemplated that the guide comprises a first guide part. The first guide part is arranged on the inner side of the outer sleeve. In particular, the first guide part is integrally formed with the outer sleeve. Preferably, the guide comprises a second guide part. The second guide part is arranged on the inner sleeve. It can also be contemplated here that the second guide is integrally formed with the inner sleeve. The first guide part and the second guide part are observed to be engaged with each other in a direction perpendicular to the longitudinal axis. This is a particularly advantageous concept of the guide. This is because it is also achieved that not only highly accurate axial guidance of the movement is promoted, but also the inner sleeve automatically rotates together when the outer sleeve rotates around the longitudinal axis of the coupling half. However, in the absence of the inner sleeve being exposed to the outside and being able to be grasped by the user, it thereby performs the same rotational movement as the outer sleeve. In particular, it is also contemplated that the guide promotes the azimuth motion coupling between the outer sleeve and the inner sleeve. The azimuth motion coupling between the outer sleeve and the inner sleeve is configured via a specific partial path of the entire rotational motion path of the outer sleeve. Particularly, however, the azimuth motion connection is not configured on the entire possible rotational motion path of the outer sleeve. The azimuth motion connection preferably reaches 100% of the entire possible rotational motion path less than the outer sleeve for the rotational motion path, however, at least 80%, particularly at least 85%, particularly at least 90%, particularly at least 95%. By the azimuth motion connection of this relatively large part, it is realized that when connecting and rotating the outer sleeve, the two coupling half parts are pulled axially toward each other in the best possible way. However, on the other hand, it is also promoted that the outer sleeve and the inner sleeve can be contacted and connected in the azimuth direction on the last, secondary azimuth rotational motion part of the entire rotational motion path of the sleeve. This is particularly advantageous, so as to reach the connection final position in an improved manner. Particularly, this is still advantageous, so that the user may also be able to perceive the connection final position in an improved manner. This is because the azimuth contact connection between the outer sleeve and the inner sleeve can be recognized by the user in this regard.

[0011] It is conceivable that the guide portion is an axially extending groove. It is also conceivable that the guide portion is an axially extending elevation. Preferably, the groove or elevation is configured to be completely straight in the axial direction and thus in the direction of the longitudinal direction of the coupling half-parts. Thus, a particularly precise guide portion with respect to a straight axial guide is provided.

[0012] It is conceivable that the other guide part comprises a coupling geometry opposite to the groove or the heightened part. By such a design, in this connection, the best possible way of coupling of the two guide parts is facilitated. On the other hand, a space-saving design is thus also achieved. By these complementary geometries, the contact of the two guide parts on the largest possible surface is also promoted. Thus, a corresponding retaining force can also be advantageously generated. Therefore, a particularly reliable retaining force for the azimuth motion coupling between the outer sleeve and the inner sleeve is promoted.

[0013] It is preferably envisaged that the guide part (in particular the other guide part mentioned) is configured to be elastically resilient in a direction perpendicular to the longitudinal axis. By such a design here, a certain radial compression force can be generated between the two guide parts, in particular in the radial direction. In this regard, the connection is improved again. Other advantages of this elastically resilient design are also seen in the effect that connection and contact connection are possible in an improved manner. This is because in the two hard parts, the contact connection (if any) is only achieved under extremely high forces. This may lead to damage or destruction of some components. By such an elastically resilient design (which is particularly directed in the radial direction), the connection and contact connection can also occur in a continuous process. The connection or contact connection force can be steadily increased.

[0014] In an advantageous embodiment, it is envisaged that the further guide part is, for example, a spring. It may, for example, be a leaf spring. The further guide part may preferably be integrally formed with the sleeve part, in particular the inner sleeve.

[0015] In an advantageous embodiment, it is envisaged that an azimuth holding force is formed by a guide, by which the outer sleeve and the inner sleeve are movably coupled when rotating around the longitudinal axis. By this azimuth holding force, in an advantageous embodiment, the force threshold is predetermined. In the case where the azimuth rotation force acts on the outer sleeve and exceeds the force threshold, the rotational coupling between the outer sleeve and the inner sleeve can be contact-coupled. Therefore, a limited concept is also provided, which allows the outer sleeve and the inner sleeve to be contact-coupled in the azimuth direction under predetermined limited conditions.

[0016] This is a particularly advantageous embodiment of the guide, which in this respect thus provides for automation of the contact coupling between the outer sleeve and the inner sleeve in the azimuthal direction about the longitudinal axis.

[0017] In particular, it is envisaged to form a tactile feedback by means of the guide. By means of the tactile feedback, the coupling end position of the two coupling halves can be tactilely perceived. The end position is reached when the rotational coupling is released, and a tactile signal is generated by releasing the rotational coupling. Thus, advantageously, by means of this design, a tactile feedback is given to the user that the coupling end position has been reached. By achieving the release of the two guide parts and thereby generating a tactilely perceptible signal, i.e., the user of the electrical plug can easily discern that the coupling end position has been reached. In particular, by means of this advantageous embodiment, if the rotational force exceeds a predetermined force threshold, it is recognized in a manner similar to a torque wrench, so that the two guide parts contact the coupling and thereby generate a tactile signal. In particular, the force threshold is predetermined in such a way that the excess of the rotational force occurs only when the sleeve has reached its rotational end position in the azimuthal direction, and thereby the coupling end position of the two coupling halves is reliably set.

[0018] It is preferably envisaged that the outer sleeve has an observation window. The observation window is oriented perpendicular to the longitudinal axis of the coupling half-part. The observation window is configured to extend completely through the wall of the outer sleeve. This means that it is particularly configured as a radial hole in the wall of the outer sleeve. Through the observation window, an optical feedback device is formed, and the user can observe the coupling final position of the two coupling half-parts from the outer sleeve outside through the optical feedback device. A further advantageous embodiment is provided in this connection. This is because in the basic position of the sleeve, the inner sleeve observed in the axial direction has not overlapped with the observation window. Therefore, if the user observes the sleeve from the outside through the observation window, he cannot yet identify the inner sleeve arranged to be positioned inside the outer sleeve. However, in the coupling final position, the inner sleeve observed in the axial direction is axially displaced far enough relative to the outer sleeve to overlap with the observation window. Thereby, by this design or in combination with the advantageous tactile feedback device mentioned above or even without the tactile feedback device, the coupling final position can also be reliably identified.

[0019] In an advantageous embodiment, it is envisaged that the outer sleeve has a leading edge. The leading edge comprises at least one stopper, which is oriented inwardly and protrudes inwardly perpendicular to the longitudinal axis. The protrusion is formed relative to the wall of the outer sleeve (particularly the jacket wall of the outer sleeve). The inner sleeve observed in a direction perpendicular to the longitudinal axis is received in the outer sleeve to overlap with the stopper. This means that the outer dimensions of the inner sleeve measured perpendicular to the longitudinal axis are greater than the radial inner edge of the stopper. By such a design, the maximum displacement positioning of the inner sleeve relative to the outer sleeve is also limited. In addition, by this design with a stopper, a safety device is also configured to prevent the inner sleeve from being lost. It can not fall out of the outer sleeve axially in the contact coupling state or the contact coupling position and in the coupling position.

[0020] It is conceivable that the aforementioned stop is configured to extend completely circumferentially in the azimuth direction around the longitudinal axis. In such a design, the stop is thus configured to extend circumferentially without interruption. It thus behaves as an annular strip.

[0021] In such a design, it is advantageously envisioned that the radial height of such a stopper measured perpendicular to the longitudinal axis is less than the radial height of the locking mechanism formed on the outside of the front of the second coupling half part. Therefore, the inner width between the boundary wall of such a stopper positioned radially inward and the relative edge of the front edge is greater than the size between the top edge of the locking mechanism on the front of the second coupling half part and other external parts positioned relatively on the outside of the front for this purpose. The dimensions named for this purpose are viewed in a plane perpendicular to the longitudinal axis of the first coupling half part and the second coupling half part respectively. They can also extend through the longitudinal axis of the corresponding naming and be viewed. By such dimensioning, sleeve can thereby be pushed through this locking mechanism in the axial direction, and they can not contact in the radial direction.

[0022] However, in other embodiments, it is also conceivable that the inwardly protruding stop on the front edge is configured to extend incompletely circumferentially around the longitudinal axis of the first coupling half component. On the contrary, it can be configured to interrupt at least one place. It is also conceivable that there are at least two separate stops on this front edge, which are configured to be spaced apart from each other in the azimuth direction. In particular, these can be individually sized in the azimuth direction around the longitudinal axis of the first coupling half component. For example, they are preferably sized so that they are less than the azimuth distance between the two separate locking mechanisms on the outside of the front portion of the second coupling half component. Thus, such a radially larger stop can be axially pushed between two such locking mechanisms arranged on the front portion of the second coupling half component.

[0023] It is preferably envisaged that the front edge of the inner sleeve is arranged in the basic position of the inner sleeve, axially spaced from the stop. It is particularly envisaged that in the final position of the connection of the two coupling half parts, the front edge of the inner sleeve directly contacts the rear side of the stop. This is a further very advantageous embodiment. On the one hand, thereby, it is helpful for the desired axial movability of the inner sleeve relative to the outer sleeve. On the other hand, in the final position of the connection, the limited direct contact of the front edge of the inner sleeve and the stop is also achieved. Thus, the inner sleeve is also axially fixed in the final position of the connection in a particularly advantageous manner. This is because, on the one hand, it directly contacts the rear side of the stop, and on the other hand, in this state, the locking mechanism configured on the outside of the front of the second coupling half part also directly contacts the front edge of the inner sleeve. It is particularly envisaged that in the final position of the connection observed in the axial direction, the front edge of the inner sleeve is arranged between the locking mechanism of the second coupling half part and the stop on the front edge of the outer sleeve of the first coupling half part. In particular, the front edge of the inner sleeve between the mentioned parts is also blocked. This achieves a particularly advantageous axial fixing of the inner sleeve in the coupled end state or coupled end position.

[0024] In an advantageous embodiment, it is envisaged that the inner sleeve has a front edge. At least one radial coupling nose is formed on the front edge. The coupling nose is configured to be connected to a coupling strip, which is arranged on the second coupling half. The coupling strip particularly represents an example of a locking mechanism of the second coupling half. The coupling nose is arranged to protrude inwardly relative to the wall (particularly the outer wall) of the housing of the first coupling half in a direction perpendicular to the longitudinal axis of the first coupling half. This means that it is configured to protrude further inwardly with respect to the wall (particularly the jacket wall) of the inner sleeve. By means of the coupling nose, a particularly advantageous coupling of the locking mechanism (particularly the coupling strip) on the second coupling half is facilitated. Thus, a particularly advantageous engagement of the two components from the back and sliding along the azimuth angle of each other is facilitated.

[0025] Preferably, the coupling nose extends only partially over the entire circumferential length around the longitudinal axis of the first coupling half in the azimuth direction. In particular, the azimuth extension of such a coupling nose reaches between 3° and 20°, in particular between 5° and 15°, of the 360° of the entire circumferential length. By such a design, on the one hand, an easily operable coupling concept can be provided. On the other hand, it is also convenient to guide the coupling nose in an improved manner, the size of the coupling nose being designed so as to pass through the gap between the two locking mechanisms of the second coupling half in the axial direction, the two locking mechanisms being arranged to be spaced apart from each other in the azimuth direction. Therefore, a simple connection of such a coupling nose with the rear wall of such a coupling strip can also be achieved.

[0026] In particular, a quick locking system is configured by such a coupling nose and a coupling strip. In particular, a bayonet locking system is configured by such a coupling nose and a coupling strip. Thus, in particular, such a coupling end position can be reached by an azimuthal rotation path of the outer sleeve preferably between 40° and 90° out of 360° relative to the entire circumferential length. The coupling nose is thus part of a quick locking, in particular a bayonet locking system.

[0027] In an advantageous embodiment, it is envisaged that the inner sleeve, viewed in the direction of the longitudinal axis, is shorter than the outer sleeve. In an advantageous embodiment, it is envisaged that the inner sleeve, viewed in the direction of the longitudinal axis, is completely arranged within the axial length of the outer sleeve in the basic position of the contact coupling and in the coupling final position in which the two coupling halves are coupled. The inner sleeve is thus completely received in the outer sleeve. Therefore, on the one hand, it is also arranged in a protected manner. On the other hand, the axial guidance of the inner sleeve can thus be particularly advantageously achieved particularly accurately.

[0028] It is preferably envisaged that the inner sleeve, viewed in the direction of the longitudinal axis of the first coupling half, is arranged without any overlap with the outer shell. Thus, viewed in the direction of the longitudinal axis, the outer shell and the inner sleeve are arranged in a row with each other. In particular, it is envisaged that, viewed in a direction perpendicular to the longitudinal axis of the first coupling half, the walls of the inner sleeve are arranged to overlap with the walls of the outer shell. The walls are outer walls. They are in particular the outer walls of a hollow cylinder. Thus, it is also achieved that the outer shell and the inner sleeve can be pushed into each other in the axial direction and thus reach an overlapping state. In an embodiment, the inner sleeve, viewed in the direction of the longitudinal axis of the first coupling half, is arranged to overlap with the outer shell.

[0029] It is preferably envisaged that the outer sleeve viewed in the axial direction is arranged to be stationarily fixed on the housing. Thus, only a relative rotational movement of the outer sleeve relative to the housing as described above is facilitated.

[0030] Preferably, the sleeve, in particular the outer sleeve, is fixed directly to the outside of the housing by a snap ring. In particular, the inner sleeve is arranged without direct mechanical fastening to the housing. It is conceivable that the inner sleeve is arranged axially spaced from the housing of the first coupling half-part and therefore does not contact the housing of the first coupling half-part both in the basic position in which the two coupling half-parts are not yet coupled and in the coupled final position.

[0031] In an advantageous embodiment, it is envisaged that the outer sleeve is arranged to overlap axially with the outer shell. In particular, the outer sleeve is configured so that it surrounds the outer shell in the axial overlap region on the outside. Therefore, the outer sleeve surrounds the outer shell on the outside of the outer shell.

[0032] Another aspect of the present invention relates to an electrical plug. The electrical plug comprises a first coupling half. The first coupling half is configured in particular according to the above-mentioned aspects or advantageous embodiments thereof. In addition, the electrical plug comprises a second coupling half separated from the first coupling half. The two coupling halfs can be releasably coupled in a non-destructive manner.

[0033] The second coupling half part preferably comprises a front part. A locking part is formed on the outside of the front part. The locking part can be a screw thread. The locking part can additionally or alternatively include a locking mechanism. The locking mechanism can be an azimuth coupling strip. The locking mechanism can be a component of a bayonet lock. Such a locking mechanism therefore has no screw thread. Such a coupling strip only partially extends over 360° in a circumferential direction around the longitudinal axis of the second coupling half part. In particular, such a coupling strip extends over an azimuth angle length between 40° and 100°.

[0034] In an advantageous embodiment, it is envisaged that the housing of the second coupling part is configured at least partially as a hollow tube. In particular, the housing of the second coupling half is configured as an angled tube. In particular, the angled tube is configured to include two tube parts, which are oriented 90° relative to each other. In particular, a contact carrier is arranged in the housing of the second coupling half. Electrical contacts are arranged on the contact carrier. These electrical contacts for direct electrical contact are configured to include electrical contacts of the first coupling half.

[0035] Preferably, the housing of the first coupling half is configured as a tube. In particular, the tube is a straight tube. On the contact carrier, the first coupling half is particularly arranged with electrical contacts.

[0036] Other aspects of the invention relate to a method, in particular for axially coupling a first coupling half of an electrical plug to a second coupling half of an electrical plug, the method comprising the following steps:

[0037] - providing a first coupling half-component, comprising a housing and a sleeve, the sleeve being rotatably arranged on the housing without threads and comprising an outer sleeve and an inner sleeve separated therefrom,

[0038] - providing a second coupling half-part;

[0039] - axially sliding the first coupling half-part over the second coupling half-part so that the sleeve of the first coupling half-part axially overlaps the front part of the housing of the second coupling half-part;

[0040] - coupling a coupling structure formed on the inner sleeve of the sleeve and comprising a mating coupling structure formed on the outer side of the front part,

[0041] - rotating the outer sleeve of the sleeve about the longitudinal axis (A) of the first coupling half and thereby rotating the inner sleeve together;

[0042] - an axial displacement of the inner sleeve is achieved due to an axial relative movement between the coupling structure and a mating coupling structure engaging the coupling structure, wherein the axial relative movement of the coupling structure and the mating coupling structure is generated by a rotation of the sleeve;

[0043] - The coupled end position of the coupling halves is achieved when the inner sleeve has reached the axial end position.

[0044] By this method, a particularly advantageous coupling of the two coupling halves is facilitated. The coupling end position can be reached securely and reliably. In particular, by this method of proceeding, the azimuthal end rotational position of the sleeve, in particular the outer sleeve, on the first coupling half is also reached in a safer and more reliable manner. In particular, it can thereby be set more reliably.

[0045] In an advantageous embodiment, it is envisaged that when the outer sleeve starts to rotate along the rotation path from the base position of the outer sleeve to reach the maximum final rotation position, the intermediate position is reached. After at least 80%, particularly 85%, particularly 90%, particularly at least 95% (however less than 100%) of the maximum azimuth rotational motion of the outer sleeve, the intermediate position can be reached. Then in this intermediate position, the connection final position of two connection half parts is realized. If the outer sleeve further rotates beyond this intermediate position in the azimuth direction, the azimuth between the two guide parts of the guide formed on the outer sleeve and the inner sleeve realizes contact connection. By this contact connection of the two guide parts of the guide, a tactile signal is generated, which is perceived by the user who grasps the outer sleeve. Thereby, the connection final position is tactilely identified. Additionally or alternatively, an optical feedback device can be envisaged. In this feedback device, the inner sleeve moves during the connection and thus when rotating relative to the outer sleeve azimuth in the axial direction. In the connection state, the two connection half parts inner sleeves reach the corresponding axial final position. In this axial final position, the outside of the inner sleeve is configured to overlap axially with a viewing window formed in the wall of the outer sleeve. Thus, from the outer sleeve outside, by observing the viewing window, the inner sleeve in this axial final position can be identified, and thus it can be identified that the coupling final position has been reached.

[0046] It is conceivable that the inner sleeve is marked on its outside (particularly with a color). This marking in the coupling final position can be identified through the viewing window. Thus, the coupling final position can be identified in an improved manner again.

[0047] When the inner sleeve moves relative to the outer sleeve axially, the leading edge of the inner sleeve is pushed axially toward the stopper of the outer sleeve. In the connection final position, the leading edge of the inner sleeve directly stops against the rear side of the stopper of the outer sleeve.

[0048] The coupling structure is formed by the radially inwardly facing coupling nose arranged on the front edge of the inner sleeve. The mating coupling structure is formed by a locking mechanism formed on the outside of the front part of the second coupling half, in particular by a coupling strip. The coupling structure and the mating coupling structure are directly connected to each other. For example, a bayonet lock can be arranged here. A screw thread structure is also conceivable. In this case, the coupling structure and the mating coupling structure can each be a screw thread. Likewise, the coupling structure can be a coupling nose and a mating coupling structure screw thread explained above.

[0049] Preferably, the coupling nose in the coupling end position is caught in the axial direction between the locking mechanism on the second coupling half and the stop on the outer sleeve.

[0050] Further advantageous embodiments of the method steps for coupling two coupling halves have been presented above. Furthermore, other advantageous method steps are given by the essential features of the coupling halves individually or at least partially operatively combined with each other, so that corresponding method steps can be carried out according to them.

[0051] The use of the indicators "top", "bottom", "front", "back", "horizontal", "vertical", "depth direction", "width direction", and "height direction" provides the location and direction for the intended use and intended arrangement of the plug, and for a user standing in front of the plug and looking in the direction of the plug. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Further features of the invention are apparent from the claims, the drawings and the description of the drawings. The features and feature combinations mentioned above in the description and the features and feature combinations mentioned below in the description of the drawings and / or shown exclusively in the drawings can be used not only in the respectively specified combination but also in other combinations without departing from the scope of the invention. Therefore, embodiments are also considered to be covered and disclosed by the invention, which are not explicitly shown and explained in the drawings, but which result from and can result from separate feature combinations from the explained embodiments. Embodiments and feature combinations are also considered to be disclosed, so that they do not include all the features of the originally formulated independent claims. Furthermore, embodiments and feature combinations will be considered to be disclosed, in particular those disclosed by the above-mentioned embodiments, which extend beyond or deviate from the feature combinations specified in the reverse references of the claims.

[0053] Embodiments of the present invention are explained in more detail below in conjunction with schematic diagrams. These are shown in:

[0054] Figure 1 A schematic diagram of an embodiment of a coupling half-part according to the invention, wherein the coupling half-part is represented only by a partial area with reference to the longitudinal axis;

[0055] Figure 2 A cross-sectional view through an embodiment of an electrical plug, wherein Figure 1 The first coupling half is shown together with the second coupling half of the electrical plug, the second coupling half being separated from the first coupling half and being in a coupling final position;

[0056] Figure 3 a perspective view of an embodiment of a second coupling half of an electrical plug; and

[0057] Figure 4 Section perpendicular to the longitudinal axis of the first coupling half, wherein the section is schematically formed in this respect by the sleeve of the first coupling half and the sleeve is only represented in partial regions. DETAILED DESCRIPTION

[0058] In the figures, identical elements or elements having the same function are provided with the same reference signs.

[0059] exist Figure 1 In the figure, an electric plug 2 is shown ( Figure 2 ) is a cross-sectional view of a first coupling half 1. The cross-sectional view is formed in a vertical plane, which includes the longitudinal axis A of the first coupling half 1. Figure 1 , only the top half of the first coupling half 1 about the longitudinal axis A is shown. The first coupling half 1 is configured for coupling to a second coupling half 3 ( Figure 2 and Figure 3 ). In this connection, a non-destructively releasable coupling between the first coupling half 1 and the second coupling half 3 is facilitated.

[0060] The first coupling half 1 comprises a housing 4. The housing 4 is shown as a hollow cylinder in the embodiment. The housing 4 is hard. It is particularly configured to be made of metal. Figure 1 , the first connection half part 1 is only shown in a partial area above the longitudinal axis A. The first connection half part 1 is configured to extend circumferentially around the longitudinal axis A, and is particularly configured to be completely circumferentially closed. For this purpose, the housing 4 is configured to extend circumferentially around the longitudinal axis A. The longitudinal axis A thus also forms the central axis of the housing 4 configured as a hollow cylinder. The housing 4 particularly has a wall 5 in this connection. The wall 5 is particularly a hollow cylindrical wall. In one design, a contact carrier 7 is arranged in the interior 6 of the housing 4. The contact carrier 7 is a component separate from the housing 4. The contact carrier 7 is configured to receive an electrical contact (not shown). The electrical contact can be a needle contact. However, the electrical contact can also be a contact socket for inserting an electrical needle contact as a needle. The contact carrier 7 is particularly made of plastic.

[0061] In addition, the first coupling half part 1 includes a sleeve 8. The sleeve 8 is configured to be separated from the housing 4. The sleeve 8 is arranged directly on the housing 4. The sleeve 8 is arranged on the housing 4 to be movable relative to the housing 4. The sleeve 8 includes an outer sleeve 9. The outer sleeve 9 is particularly configured as a hollow cylinder. The outer sleeve 9 is arranged directly on the housing 4. In particular, the outer sleeve 9 is arranged to be rotatable on the housing 4 without threading. This means that the outer housing 9 and the housing 4 are not connected to each other by screw threads. In particular, the outer sleeve 9 is arranged to be rotatable on the housing 4 without threading by a retaining ring 10. For this purpose, it is envisaged to form a particularly radial circumferential groove 5b on the outer side 5a of the wall 5 of the housing 4. The retaining ring 10 is received therein. In addition, it is envisaged that a groove 11b is formed on the inner side 11a of the wall 11 of the outer sleeve. The wall 11 of the outer sleeve is also an outer wall, such as the wall 5. The wall 11 of the outer sleeve is a hollow cylindrical wall. The retaining ring 10 extends radially into the groove 11b. The outer sleeve 9 is arranged in an axially fixed position on the housing 4 by means of this mechanical connection. Relative movement between the housing 4 and the outer sleeve 9 in the direction A of the longitudinal axis is thereby particularly prevented or substantially avoided. Thus, movement in this axial direction can at most be achieved via the clearance of the retaining ring 10 in the grooves 5b and 11b. The sleeve 8 forms a mechanical connector 8a. This is configured for direct connection with the second coupling half 3 and according to the intended use envisaged for it.

[0062] As can also be appreciated, the outer sleeve 9 viewed in the axial direction and thus in the direction of the longitudinal axis A is arranged overlapping the housing 4. In particular, the outer sleeve 9 surrounds the housing 4 on the circumferential side. The outer sleeve 9 thus comprises an inner diameter that is larger than the outer diameter of the housing 4.

[0063] In an advantageous embodiment, the outer sleeve 9 includes a stopper 13 protruding inwardly perpendicular to the longitudinal axis A on the front edge 12 of the outer sleeve. The stopper 13 can be configured in the azimuth direction and thus completely closed in the circumferential direction around the longitudinal axis A. However, it can also be imagined that the stopper 13 is configured to be interrupted in the circumferential direction around the longitudinal axis A. Therefore, in the circumferential direction around the longitudinal axis A, several stopper sections of the stopper 13 can be configured. Through the stopper 13, the receiving space 14 in the interior of the outer sleeve 9 is limited. In the receiving space 14 (which can also be referred to as the radial groove on the inner side 11a), the inner sleeve 15 of the sleeve 8 is arranged. The inner sleeve 15 is a component separated from the outer sleeve 9. The inner sleeve 15 observed in the direction perpendicular to the longitudinal axis A thus extends into the receiving space 14. Therefore, the inner sleeve 15 observed in the direction perpendicular to the longitudinal axis A is arranged to overlap with the stopper 13. In particular, the inner sleeve 15 is configured as a hollow cylinder. The inner sleeve 15 is configured as a single piece. The inner sleeve 15 may be formed, for example, from a metal sheet.

[0064] The outer sleeve 9 can be configured to be made of metal, for example. The outer sleeve 9 can be zinc die-cast, for example. However, the outer sleeve 9 can also be made of plastic, for example. For example, it can be an injection-molded component.

[0065] In an advantageous embodiment, it is envisaged that the inner sleeve 15 is arranged adjacent to the front edge 16 of the outer shell 4 in the axial direction. The inner sleeve 15 is arranged in the axial direction in all positions, in particular without any overlap with the outer shell 4. Therefore, the inner sleeve 15 is arranged in line with the outer shell 4. The inner sleeve 15 observed in the axial direction is arranged in the outer sleeve 9 over its entire length. The inner sleeve 15 is not directly mechanically attached to the outer shell 4. The inner sleeve 15 is in particular only mechanically attached to the outer sleeve 9. This is also achieved by receiving the inner sleeve 15 in the receiving space 14. By means of the stop 13, the inner sleeve 15 is also received in the outer sleeve 9 in the axial direction so that it is fixed to prevent falling out. Thereby preventing the inner sleeve 15 from sliding out axially from the outer sleeve 9.

[0066] The inner sleeve 15 comprises at least one coupling nose 18 on the front edge 17 of the inner sleeve. The coupling nose 18 is a nose which projects radially inwardly towards the longitudinal axis A. The coupling nose 18 is configured for coupling with a coupling strip 19 ( Figure 2 ) Direct coupling. Preferably the inner sleeve 15 comprises several coupling noses 18, in particular three coupling noses 18. These coupling noses 18 viewed in the circumferential direction around the longitudinal axis A are arranged equidistant from one another.

[0067] It is conceivable that the radial distance a1 between the front side 13a of the stop 13 located radially on the inside is equal to the distance a2. The distance a2 is the radial distance between the front side 18a of the coupling nose 18 located radially on the inside and the longitudinal axis A. However, it is also conceivable that the distance a1 is greater than the distance a2. It is necessary that the stop 13, viewed in a direction perpendicular to the longitudinal axis A, is always configured to be large enough to overlap radially with the wall 20 of the inner sleeve corresponding to the hollow cylindrical wall of the inner sleeve 15 to be formed.

[0068] In addition, the inner sleeve 15 includes a second guide part 21. The second guide part 21 is configured to be integrally formed with the inner sleeve 15. The second guide part 21 is a component of the guide 22. The relative movement between the inner sleeve 15 and the outer sleeve 9 is guided by the guide 22. In particular, the second guide part 21 is a spring. It can be a leaf spring, for example. In particular, the second guide part 21 is configured to be resilient in the radial direction. In addition, the guide 22 includes a first guide part 23 as another guide part. The first guide part 23 is particularly a recess. In particular, it is an axial straight recess. For example, it can be configured as a groove or a groove. In the first guide part 23, a part 21a of the second guide part 21 as another guide part is engaged. The part 21a can be, for example, a protuberance formed radially outward. Therefore, a radial engagement between the second guide part 21 and the first guide part 23 is formed.

[0069] By means of the guide 22, the axial guidance of the inner sleeve 15 relative to the outer sleeve 9 is achieved. In addition, by means of the guide 22, in an advantageous embodiment, the azimuth motion coupling between the inner sleeve 15 and the outer sleeve 9 is achieved. This means that when the sleeve 8 rotates relative to the housing 4 around the longitudinal axis A, the outer sleeve 9 is coupled to the inner sleeve 15 motion. Thus, when the outer sleeve 9 is touched by the user and rotates correspondingly around the longitudinal axis A, the inner sleeve 15, which is positioned inside and cannot be touched by the user, automatically rotates together. In particular, the first guide part 23 can be a first guide part. In particular, the second guide part 21 can be a second guide part.

[0070] The inner sleeve 15 is arranged or mounted on the outer sleeve 9 so as to be movable relative thereto. The inner sleeve 15 is axially movable relative to the outer sleeve 9 and the housing 4 in a defined manner.

[0071] In addition, if Figure 1 As can be seen in the figure, the outer sleeve 9 has an observation window 24. The observation window 24 is formed in the wall 11 of the outer sleeve. The observation window 24 is a radial through hole. Through this hole 24, the receiving space 14 can be seen from the outside of the sleeve 8.

[0072] exist Figure 1, the first coupling half part 1 is shown in a basic position. This means that it is arranged in a contact coupling state with the second coupling half part 3. In this basic position, the inner sleeve 15 is arranged in an axial basic position. This axial basic position 15 is a position in which the inner sleeve 15 is arranged such that the front edge 17 of the inner sleeve is spaced from the stop 13. In this regard, a distance a3 is formed. In particular, this is the maximum axial distance between the inner sleeve 15 and the stop 13. In this basic position, the inner sleeve 15 observed in the axial direction is configured to have no overlap with the observation window 24. This means that when the inner sleeve 15 is seen from the outside of the sleeve 8 through the observation window 24 in the receiving space 14, it is impossible to identify the inner sleeve 15. Therefore, it is displaced far enough in the direction of the housing 4 so that it is not identified through the observation window 24.

[0073] Thus, an integrated optical feedback device 25 is formed through the observation window 24. Through the optical feedback device 25, the coupling state and the contact coupling state between the two coupling half parts can be observed from the outside of the outer sleeve 9.

[0074] In an advantageous embodiment that can be envisaged in addition to or instead of the optical feedback 25, the first coupling half-part 1 comprises a tactile feedback 26. For this purpose, it is envisaged in an embodiment that, for example, a second recess 27 is formed on the inner side 11a. In an advantageous embodiment, the recess 27 is axially oriented. In an advantageous embodiment, it is configured to extend directly adjacent to the first guide portion 23, viewed in the circumferential direction about the longitudinal axis A. In particular, the recess 27 is shorter than the first guide portion 23 in the axial direction. Preferably, the axial length of the recess 27 is at least large enough to receive the axial dimension of the part 21a.

[0075] This tactile feedback device 26 generates a tactile signal when the coupled end position between the two coupled halves is reached.

[0076] The guide 22 is also configured so that it forms an azimuth holding force, and the outer sleeve 9 and the inner sleeve 15 are movably connected by the azimuth holding force when rotating around the longitudinal axis A. In particular, by the azimuth holding force, a force threshold is predetermined in a limited manner. The effect of this situation is that, in the case of an azimuth rotation force acting on the outer sleeve 9 and exceeding the force threshold, the rotational connection between the outer sleeve 9 and the inner sleeve 15 is contacted and connected in a limited manner. Therefore, in the case of an azimuth rotation force exceeding the force threshold, the part 21a is disengaged from the first guide part 23 and snaps into the recess 27 in the azimuth direction. A tactile signal is generated by this process, and the tactile signal can be perceived by the user, especially when grasping the outer sleeve 9. In particular, when the part 21a is snapped into the recess 27 from the first guide part 23, the connection final position between the two connection half parts is also generated. Therefore, by this tactile feedback device 26, a clear tactile signal is also generated, which allows to clearly distinguish the connection final position reached.

[0077] exist Figure 2 In Figure 1 The entire electric plug 2 is shown in the corresponding cross-sectional view in FIG. Here, it only shows the top half about the longitudinal axis A, B. Here, the final position of the connection between the first connection half part 1 and the second connection half part 3 is shown. As can be seen here, the inner sleeve 15 is displaced to the front relative to the outer sleeve 9 in the axial direction. The inner sleeve 15 is arranged to overlap with the observation window 24 in the axial direction. When observed from the outside through the observation window 24, the inner sleeve 15 can be identified. Also from this, the final position of the connection is optically identifiable. In addition, it can be identified that the front edge 17 of the inner sleeve with the front side (in particular the connection nose 18) directly contacts the rear side 13b of the stop 13. In addition, the rear side 18b of the connection nose 18 directly contacts the front side 19a of the connection strip 19. The connection strip 19 represents an embodiment of a locking mechanism in this connection. The locking mechanism is configured as a single piece on the outer side 28 of the front part 29 of the second connection half part 3. A thread 30 can also be additionally formed on the outer side 28. In particular, viewed in the circumferential direction around the longitudinal axis B of the second coupling half 3, several separate coupling strips 19 are formed. Figure 3 In this regard, the coupling strip 19 and the other coupling strip 19 ′ as a coupling strip can be identified. Preferably, three separate coupling strips are formed on the outer side 28 .

[0078] like Figure 2 , which shows the final position of the connection between the first coupling half 1 and the second coupling half 3, the coupling nose 18 is caught in the axial direction between the stop 13 and the coupling strip 19. In addition, it can also be seen that the front edge 16 of the housing 4 is in contact with the front edge 31 of the housing 32 of the second coupling half. Here, a metal contact between the front edges 16 and 31 is formed.

[0079] In particular, the second coupling half 3 comprises a contact carrier 33 ( Figure 3 ). The contact carrier is inserted into the housing 32 of the second coupling half. The contact carrier 33 can be made of plastic. It is intended to receive electrical contacts 34, such as Figure 3 As shown in . The electrical contacts 34 can be pin contacts. However, they can also be contact sockets for such pin contacts.

[0080] exist Figure 2 In FIG. 1 , the position of the inner sleeve 15 is shown to be the maximum axial displacement forward. Figure 2 In the view in FIG. 2 , in this end-of-coupling position, the part 21 a also snaps from the first guide part 23 into the recess 27 , if present in an advantageous embodiment.

[0081] Preferably, the sleeve 8 can be rotated by a maximum of 90° about the longitudinal axis A starting from the basic position in order to reach the coupling end position between the two coupling halves.

[0082] In particular, a quick lock is formed by a locking mechanism in the form of a sleeve 8 (in particular a coupling nose 18) and a coupling strip. In particular, a bayonet lock can be configured here. The corresponding bayonet portion is formed by the coupling nose 18 and the coupling strip. Preferably, the front side 19a of the coupling strip 19 is not arranged in a plane oriented perpendicular to the longitudinal axis B. On the contrary, the front side 19a is slightly inclined. It can be a partially wound spiral shape. Therefore, it includes a certain spacing in the circumferential direction around the longitudinal axis B of the second coupling half part 3. Therefore, given other coupling strips 19' etc., this is advantageously configured.

[0083] exist Figure 3 2 shows an embodiment of the second coupling half part 3 in a perspective view. In particular, the second coupling half part 3 can be an angled half part. This means that the connector part 35 of the second coupling half part 3 is arranged at an angle (in particular 90°) on the front part 21, which is provided for coupling to the first coupling half part 1. Other components can be connected to the connector part 35.

[0084] like Figure 3 As can be seen in FIG. 2 , an azimuthal gap 36 is formed in the circumferential direction about the longitudinal axis B between two adjacent coupling strips.

[0085] When the two coupling half parts are coupled, they are guided towards each other in the axial direction and thus in the direction of their longitudinal axes A and B. The first coupling half part 1 slides with its sleeve 8 over the front part 29. In particular, in this state, the stop 13 and the coupling nose 18 are arranged to overlap in the azimuth direction around the longitudinal axis A. In particular, the first coupling half part 1 is oriented relative to the second coupling half part 3 so that the stop 13 and the coupling nose 18 approaching from the front side are pushed through the gap 36 and thus pass the coupling strip 19 and the other coupling strip 19' in the axial direction. If this state is then reached, the sleeve 8 rotates around the longitudinal axis A. In this connection, the coupling nose 18 rotates relative to the coupling strip 19 and the other coupling strip 19' in the circumferential direction around the longitudinal axis A. The coupling nose 18 engages, for example, behind the coupling strip 19. In this connection, the rear side 18b of the coupling nose 18 slides directly along the front side 19a. Due to the favorable tilted position of the front side 19a in the azimuthal movement, the inner sleeve 15 is pulled in its axial end position and thus leaves the housing 4. When the coupling end position is generated due to the rotation and contact of the rear side 18b with the front side 19a, the rotational force for the sleeve 8 increases successively. If the rotational force is greater than the force threshold, the part 21a escapes from the first guide part 23 in the azimuthal direction and snaps into the recess 27.

[0086] If the stop 13 has a radially inward extension greater than the radial height of the coupling strip, the stop 13 cannot be configured as completely circumferential. This is because sliding over the gap 36 or pushing through the gap 36 will no longer be possible. Thus, if in an embodiment the stop 13 is configured as completely circumferential and uninterrupted, the radial extension of the stop 13 is less than the height of the coupling strip. In the alternative embodiment explained above, such as Figure 1 and Figure 2 As shown in , the stop portion 13 further extends radially inward. In such an embodiment, the stop portion 13 is interrupted in the circumferential direction around the longitudinal axis A. It is then configured to be composed of several stop segments. They preferably have an azimuthal width, which corresponds in particular to the azimuthal width of the coupling nose 18. Thus, a pair is formed between the coupling nose 18 and the stop segment of the stop portion 13, which are each configured to overlap, in particular completely overlap, in the circumferential direction around the longitudinal axis A. Therefore, in this basic position, a pair formed by the stop segment and the coupling nose 18 can be pushed through the corresponding gap 36 in the axial direction. The size of this azimuthal width between the stop segment of the stop portion 13 and the coupling nose 18 is designed so that when rotating between the inner sleeve 15 and the outer sleeve 19, in particular when the part 21a is stuck in the recess 27 from the first guide portion 23, and when Figure 2In the coupling end position shown in , the azimuth angle between the configured stop section and the specified coupling nose overlaps.

[0087] exist Figure 4 An embodiment of a first coupling half-part 1 is shown in a schematic sectional view perpendicular to the longitudinal axis A in FIG. Figure 1 The section in is formed along the section line IV-IV. It is thus generated by the guide 22. In this embodiment, it can be recognized that the part 21a is inserted radially outwards into this first guide part 23. The direction of rotation D about the longitudinal axis A is depicted, the longitudinal axis A being perpendicular to the plane of the drawing.

[0088] In an alternative embodiment, it is conceivable that the first guide portion 23 is not a radially outwardly facing recess in the inner side 11a, but a heightened portion oriented inwardly towards the longitudinal axis A. In the case of such an embodiment, the second guide portion 21, in particular the part 21a, as the other guide portion is then configured complementary. The part 21 then preferably represents a groove or recess that is curved in the direction towards the longitudinal axis A.

Claims

1. A first coupling half part (1) for an electrical plug (2), the first coupling half part being configured for coupling to a second coupling half part (3) of the electrical plug (2), comprising a housing (4) and a contact carrier (7) for electrical contacts, the contact carrier (7) being arranged in the housing (4) and comprising a sleeve (8) which is separate from the housing (4) and arranged on the housing (4) so ​​as to be rotatable without threads, wherein: The sleeve (8) forms a connector (8a) of the first coupling half (1) for connection to the second coupling half (3), The sleeve (8) comprises an outer sleeve (9) which is rotatably arranged on the outer housing (4) without threads, and the sleeve (8) comprises an inner sleeve (15) which is separate from the outer sleeve (9), wherein the inner sleeve (15) is arranged on the outer sleeve (9) and is movable relative to the outer housing (4) and relative to the outer sleeve (9) in the direction of the longitudinal axis (A) of the first coupling half part (1), A guide member (22) is arranged between the outer sleeve (9) and the inner sleeve (15), and the guide member (22) guides the axial relative movement between the outer sleeve (9) and the inner sleeve (15).

2. The first coupling half (1) according to claim 1, It is characterized in that The guide member (22) comprises a first guide member portion (23), which is arranged on the inner side (11a) of the outer sleeve (9), and the guide member (22) comprises a second guide member portion (21), which is arranged on the inner sleeve (15), wherein the first guide member portion (23) and the second guide member portion (21) are engaged with each other in a direction perpendicular to the longitudinal axis (A).

3. The first coupling half (1) according to claim 2, It is characterized in that One of the first guide portion and the second guide portion is axially oriented and is a radially outwardly directed groove, or the one of the first guide portion and the second guide portion is axially oriented and is a radially inwardly directed elevation.

4. The first coupling half (1) according to claim 3, It is characterized in that The other of the first guide portion and the second guide portion comprises a coupling geometry that is complementary to the groove or the elevation.

5. The first coupling half (1) according to claim 2 or 3, It is characterized in that One of the first guide portion and the second guide portion in a direction perpendicular to the longitudinal axis (A) is configured to be elastically resilient.

6. The first coupling half-part (1) according to claim 2 or 3, It is characterized in that An azimuth retaining force is formed by the guide (22), and the outer sleeve (9) and the inner sleeve (15) are movably connected by the azimuth retaining force during rotation around the longitudinal axis (A), wherein a force threshold is predetermined by the azimuth retaining force so that when connected to the second connecting half part (3), when the azimuth torsional force on the outer sleeve exceeds the force threshold, the rotational connection between the outer sleeve (9) and the inner sleeve (15) is released.

7. The first coupling half (1) according to claim 6, It is characterized in that A tactile feedback device (26) is formed by the guide (22), and a coupled end position of the first coupling half part and the second coupling half part can be tactilely sensed by the tactile feedback device (26), wherein the end position is reached when the rotational coupling is released and a tactile signal is generated by releasing the rotational coupling.

8. The first coupling half-component (1) according to claim 2 or 3, It is characterized in that The outer sleeve (9) comprises an observation window (24), which is oriented perpendicularly to the longitudinal axis (A) and can completely penetrate the wall of the outer sleeve (9), wherein an optical feedback device (25) is configured through the observation window (24), through which the final connection position of the first connection half part and the second connection half part can be observed from the outside of the outer sleeve (9).

9. The first coupling half-part (1) according to claim 2 or 3, It is characterized in that The outer sleeve (9) comprises a front edge, wherein the front edge of the outer sleeve comprises a stop portion (13) protruding inwardly perpendicular to the longitudinal axis (A), wherein the inner sleeve (15) is received in the outer sleeve (9) to overlap with the stop portion (13) when viewed in a direction perpendicular to the longitudinal axis (A), and / or the front edge of the inner sleeve (15) is arranged to be axially spaced from the stop portion (13) in the basic position of the inner sleeve (15), and, in the final connection position of the first coupling half part and the second coupling half part, the front edge of the inner sleeve directly contacts the rear side (13b) of the stop portion (13).

10. The first coupling half-part (1) according to claim 2 or 3, It is characterized in that The inner sleeve (15) comprises a front edge, wherein at least one coupling nose (18) is arranged on the front edge of the inner sleeve for coupling to a coupling strip arranged on the second coupling half part (3), the coupling nose (18) being arranged to protrude inwardly in a direction perpendicular to the longitudinal axis (A).

11. The first coupling half-part (1) according to claim 2 or 3, It is characterized in that The inner sleeve (15) is shorter than the outer sleeve (9) when viewed in the direction of the longitudinal axis (A), and the inner sleeve (15) is completely arranged in the outer sleeve (9) when viewed in the direction of the longitudinal axis (A) both in a basic position of contact connection and in a final connection position in which the first connection half part and the second connection half part are connected.

12. The first coupling half-part (1) according to claim 2 or 3, It is characterized in that The inner sleeve (15) is arranged to have no overlap with the outer shell (4) when viewed in the direction of the longitudinal axis (A), and / or the wall of the inner sleeve (15) is arranged to overlap with the wall of the outer shell (4) when viewed in a direction perpendicular to the longitudinal axis (A).

13. An electrical plug (2) comprising a first coupling half (1) configured according to any one of claims 1 to 12, and a second coupling half (3) separated from the outer sleeve (9), wherein: The first coupling half part and the second coupling half part can be coupled.

14. A method for coupling a first coupling half part (1) of an electrical plug (2) to a second coupling half part (3) of the electrical plug (2), comprising the following steps: - providing a first coupling half part (1), said first coupling half part (1) comprising a housing (4) and a sleeve (8) rotatably arranged on said housing (4) without threads, and said sleeve (8) comprising an outer sleeve (9) and an inner sleeve (15) separate from said outer sleeve (9), - providing a second coupling half (3); - axially sliding the first coupling half (1) on the second coupling half (3) so that the sleeve (8) of the first coupling half (1) axially overlaps the front part (29) of the housing of the second coupling half (3); - coupling a coupling structure formed on the inner sleeve (15) of the sleeve (8) and comprising a mating coupling structure formed on the outer side (28) of the front part (29), - rotating the outer sleeve (9) of the sleeve (8) around the longitudinal axis (A) of the first coupling half (1) and thereby rotating the inner sleeve (15) together with the outer sleeve (9); - an axial displacement of the inner sleeve (15) due to an axial relative movement between the coupling structure and a mating coupling structure engaging the coupling structure, wherein the axial relative movement between the coupling structure and the mating coupling structure is generated by a rotation of the sleeve (8); - The coupled end position of the first coupling half-part and the second coupling half-part is reached when the inner sleeve (15) has reached the axial end position.

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