Connection device and connection arrangement for an electrical appliance, and electrical appliance having a connection device or a connection arrangement
The connection device with defined contacts and mechanical coding simplifies and ensures safe electrical connections by preventing reverse polarity and easy installation, addressing the challenges of existing connection devices.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- UNGER KABEL KONFEKTIONSTECHN GMBH & CO KG
- Filing Date
- 2025-12-12
- Publication Date
- 2026-06-25
AI Technical Summary
Existing connection devices for electrical appliances, such as stoves and ovens, often result in incorrect polarity connections and are cumbersome to install, lacking a simple and safe method for ensuring proper electrical contact and grounding.
A connection device with defined output and input contacts positioned relative to each other, allowing for a common plug insertion that ensures correct polarity and grounding, featuring mechanical coding for compatibility and a snap-fit mounting for easy installation.
Simplifies and enhances safety in connecting electrical appliances by preventing reverse polarity and facilitating easy, tool-free installation while ensuring reliable electrical contact and grounding.
Smart Images
Figure DE2025101182_25062026_PF_FP_ABST
Abstract
Description
[0001] Connection device and connection arrangement for a
[0002] Electrical appliance as well as electrical appliance with a
[0003] Connection device or connection arrangement
[0004]
[0001] The invention relates to a connection device for providing an electrical connection to an electrical appliance, in particular to a stove or an oven, wherein the connection device has several connection contacts and can be mounted in an opening in an outer wall of the electrical appliance by means of a mounting fixing and in a mounted position respective supply contacts of the connection contacts are provided on an outside of the electrical appliance and respective output contacts of the connection contacts are provided on an inside of the electrical appliance, wherein the supply contacts are designed for connecting a supply line with several supply conductors and the output contacts are designed for connecting a discharge line with several discharge conductors,so that, after connecting the supply line and the discharge line, it is possible to supply the electrical appliance with electrical power from the supply line via the connection contacts of the connection device. Furthermore, the invention relates to a connection arrangement for an electrical appliance, in particular for a stove or an oven, with such a connection device, as well as to an electrical appliance, in particular a stove or an oven, with a connection device or a connection arrangement.
[0002] Electrical appliances are usually connected to an electrical circuit via electrical supply lines. Connection devices are used for this purpose,which allow contact with corresponding connecting leads. Such connection devices are usually arranged as "terminals" on the back of an electrical appliance and allow, for example, the clamping of internal power supply leads and external power leads for electrical contact with the appliance.
[0005]
[0003] DE 202 04 069 Ul describes a mains connection box for electrically operated devices. On an outer side of the device, individual plugs of the strands of a mains connection cable can be inserted together via a common coupling bridge, after which a strain relief for the mains connection cable is attached. Inside the device, individual flat plugs of the strands of an internal cable connection can be plugged onto contacts of the mains connection box.
[0006]
[0004] In DE 20 2013 100 297 Ul, a device connection system for kitchen appliances is shown, which is mounted in a housing wall of the kitchen appliance. A power cable can be plugged into the device connection system from the outside; inside, the electrical contact is made by means of flat plugs on plug pins.
[0007]
[0005] EP 2 978 075 Bl also describes a device connection system in which a power cable with a plug can be inserted on an outside. Inside, the wires are also plugged into corresponding contacts with flat connectors.
[0008]
[0006] DE 20 2023 103 176 Ul of fenbart describes a so-called plug-in contact system for a household appliance. In this case, a device connection system of fenbart has an external plug for inserting a mains connection cable; internally, the individual strands are contacted by means of flat connectors on plug-in tabs.
[0009]
[0007] DE 198 44 603 relates to an electrical passage for a gearbox and a method for manufacturing the same. Contacts are guided through a base body in a liquid-tight manner, whereby an electrical connection can be made on both sides by means of plugs on cables.
[0010]
[0008] The object of the invention is to improve the state of the art.
[0011]
[0009] The problem is solved by a connection device for providing an electrical connection to an electrical appliance, in particular to a stove or an oven, wherein the connection device has several connection contacts and is mounted in an opening in an outer wall of the electrical appliance by means of a mounting fixing and in a mounted position respective supply contacts of the connection contacts are provided on an outside of the electrical appliance and respective output contacts of the connection contacts are provided on an inside of the electrical appliance, wherein the supply contacts are for connecting a supply line with several supply conductors and the output contacts are for
[0012] Connecting a take-off line with several take-off conductors is arranged so that, after connecting the supply line and the take-off line, it is possible to supply the electrical device with electrical power from the supply line via the connection contacts of the connection device, whereby the output contacts are positioned relative to each other by means of a defined output socket, so that a common contacting of the connection contacts is possible by inserting a take-off plug corresponding to the output socket into the output socket.
[0013]
[0010] A key concept of the invention is that output contacts, by means of an output socket, and in particular also input contacts, by means of an input plug, are positioned relative to each other within the connection device in a defined manner, so that both within the electrical device, direct contact of the output line, for example with an output plug, and in particular, direct connection of the electrical device to the external circuit via a supply socket corresponding to the input plug, takes place. It is particularly important that the core concept of the invention is that the coupling of corresponding electrical conductors with a common plug can be carried out internally within the electrical device, and thus in a particularly simple manner.
[0014]
[0011] This significantly simplifies and also makes safer the connection of the electrical device, the arrangement of the connection device in a penetration of the outer wall and the electrical completion of the electrical device, since the removal of the plug eliminates the risk of reverse polarity or incorrect polarity, in particular of the internal wiring of an electrical device, the so-called device wiring.
[0015]
[0012] The following terms shall be explained in this context:
[0016]
[0013] A “connection device” refers in particular to a device which is used for an electrical device or an electrical appliance to provide, in particular, an electrical connection through an outer wall of the electrical appliance. The connection device serves to “provide an electrical connection to an electrical appliance”, i.e., to create a connection position for conducting electrical power through the outer wall, wherein the corresponding connection device includes, for example, measures for insulating the electrical conductors.
[0017]
[0014] The “connection contacts” of the connection device serve to conduct electrical power. For example, such connection contacts are provided to form an electrical connection for a phase connection, a neutral connection, or an earth connection. Furthermore, additional phase connections or other electrical contacts can be realized by respective connection contacts.
[0015] It should be mentioned here that a “mounting fixing” is, in particular, a device for fixing the connection device in an opening in the outer wall of the electrical device and has a geometry that corresponds to an opening in the outer wall of the electrical device, in particular being rectangular or square, so that the connection device can be arranged in the opening, for example, by means of a click connection.The mounting fixing may, for example, include means for fixing the mounting fixing in the opening.
[0018]
[0016] A “breakthrough” is a material opening in an outer wall of the electrical appliance, for example a rectangular or square or otherwise shaped opening in a sheet metal forming the outer wall.
[0019]
[0017] The “outer wall” in particular forms the housing boundary of the electrical device between an interior and an exterior area, for example such an outer wall is made of sheet steel, galvanized sheet steel, enamelled sheet steel or an equivalent material.
[0020]
[0018] The “mounted position” describes the position in which the mounting fixing is arranged in the opening and is, for example, engaged with the opening.
[0021]
[0019] “Supply contacts” are areas or sections of the connection contacts that are arranged on an outside of the electrical device, while “output contacts” are respective areas of the connection contacts that are arranged in the inside of the outer wall and thus in the inside of the electrical device. The connection contacts lead electrically from the supply contacts to the output contacts through the outer wall, for example, through the connection device itself, in an electrically insulated manner.
[0022]
[0020] The “inside” refers in particular to the interior of the electrical appliance, which is mechanically separated from the “outside” by the outer wall. A “supply line” is, for example, a mains connection line or a comparable electrical line with several “supply conductors,” i.e., for example, several electrically conductive strands or cables that serve to supply electrical power to the connection device. A “delivery line” is, for example, an arrangement of cables on the inside of the outer wall for conducting the electrical power from the connection device to the interior, wherein several “delivery conductors” corresponding to the supply conductors of the supply line serve, for example, to carry an electrical phase, a neutral conductor, and, for example, an earth conductor inside the electrical appliance for further use.
[0023]
[0021] In this context, a “dispensing socket” describes, for example, a geometrically defined plug socket which positions the dispensing contacts relative to each other in such a way that a common contact of the connection contacts is made possible by inserting a corresponding pickup plug into the dispensing socket. This “pickup plug” is designed to correspond to the dispensing socket and contains the pickup conductors of the pickup line in positions corresponding to the dispensing contacts, so that a common insertion of the pickup plug into the dispensing socket ensures direct and immediate contact of all dispensing contacts with the pickup conductors.
[0024]
[0022] In order to be able to carry out an external connection of the electrical device safely and reliably, the supply contacts are positioned relative to each other by means of a supply plug, so that a common contacting of the connection contacts is made possible by inserting a supply socket corresponding to the supply plug into the supply plug.
[0025]
[0023] If the connection contacts have or include an earthing conductor contact, a neutral conductor contact and a first phase contact or, for example, further phase contacts, wherein on the outside an incoming earthing conductor contact, an incoming neutral conductor contact, a first incoming phase contact, a second incoming phase contact and / or a third incoming phase contact are provided and on the inside an outgoing earthing conductor contact, an outgoing neutral conductor contact, a first outgoing phase contact, a second outgoing phase contact and / or a third outgoing phase contact are provided, then automatic contacting by inserting the take-off plug of, for example, an AC power supply or a three-phase power supply is possible.It should be mentioned that the grounding conductor contact can, for example, be designed to protrude, so that a corresponding grounding or ground connection, and thus also the supply grounding conductor contact, which can, for example, be designed to protrude, is contacted first, and thus the grounding or ground connection of the electrical device or an additional ground connection is reliably established, for example to dissipate electromagnetic interference from the housing.
[0026]
[0024] The connecting contacts can be designed as planar contacts, for example as planar embossed contacts, which are particularly easy to manufacture.
[0027]
[0025] If the output socket and / or the input plug is provided with or has a mechanical coding according to an embodiment, an incorrect assembly of incompatible components can be prevented, for example. For this purpose, the output socket and / or the input plug have a mechanical coding, wherein the mechanical coding represents coding information for a number of phases, a voltage value, and / or a maximum operating temperature of the connection device, wherein an output plug corresponding to the output socket and / or a supply socket corresponding to the input plug can only be inserted if a corresponding coding information matches.The “mechanical coding” can, for example, refer to cams, protrusions or other geometric features of respective plugs or sockets, so that, for example, only respective plugs and sockets can be connected to each other in a way that is compatible with, for example, a maximum operating temperature of the connection device and, for example, the feed socket.
[0028]
[0026] The mechanical coding is designed in particular for a maximum operating temperature of the connection device, a maximum permissible current of the connection device and / or a number of phases of the discharge line and / or the supply line. For example, the mechanical coding can also contain information about whether the electrical device can be supplied with alternating current or three-phase current, with the corresponding current type being preset by the mechanical coding.
[0029]
[0027] According to one embodiment, the mechanical coding comprises a change in circumference and / or a change in contour of the output socket and the corresponding output plug and / or the input plug and the corresponding supply socket, wherein the respective mechanical coding represents, in particular, a maximum operating temperature of the connection device, a maximum permissible current of the connection device and / or a number of phases of the output line and / or the supply line.
[0028] If the grounding conductor contact is provided with an electrical contacting device which contacts the housing of the electrical device in the mounted position of the connection device, a housing grounding or earth connection for the housing, with, for example, additional shielding of high-frequency electrical or electromagnetic signals, can be integrated into the grounding and the assembly process.The electrical contacting device is designed in particular as a one-piece extension of the grounding conductor contact.
[0030]
[0029] According to one embodiment, the mounting fixing for fixing the connection device in the opening of the housing is designed as a click fixing, snap fixing and / or as a screw fixing.
[0031]
[0030] This allows the connecting device to be easily and, in particular, without tools, mounted in the through-hole, especially by clicking, snapping, or with the aid of a simple tool, such as a screwdriver, by means of a screw fixing. However, the screw fixing can also be designed such that the connecting device is inserted without tools into a correspondingly designed threaded section of the through-hole.
[0032]
[0031] In a further aspect, the problem is solved by a connection arrangement for an electrical appliance, in particular for a stove or an oven, with a connection device according to one of the previously described embodiments and a pre-assembled power cord with a connector. According to a further embodiment, the connection device can be equipped with an included power socket and a power cord pre-assembled with such a power socket.
[0033] supply line, for example with a
[0034] The device may be equipped with a protective contact plug or with an open cable end and / or with a pre-assembled acceptance cable fitted with an acceptance plug.
[0035]
[0032] For example, the take-off line is equipped with a block connector, for example a RAST5 connector, or another connector according to industry standard.
[0036]
[0033] In another aspect, the problem is solved by an electrical device with a connection device according to one of the previously described embodiments or a connection arrangement as described above.
[0037]
[0034] The invention will now be explained in more detail with reference to exemplary embodiments. These show
[0038] Figure 1 is a schematic representation of a
[0039] Connection device in an opening in the housing sheet of an electrical appliance in a side view ,
[0040] Figure 2a shows the connection device of Figure 1 in an isometric rear view, Figure 2b shows a power supply socket for the
[0041] Connection device of Figures 1 and 2a in an isometric top view ,
[0042] Figure 3a shows an assembled position of the
[0043] Power socket on the
[0044] Connection device in a top view,
[0045] Figure 3b shows the assembled position of Figure 3a in a side view, as well as
[0046] Figure 4 shows a connecting cable with a plug in a side view.
[0047]
[0035] A connection device 101 is used for installation in a housing sheet 191 of an electrical appliance, for example a stove or an oven. For this purpose, the connection device 101 can be inserted into an opening 193 in the housing sheet 191 and then provides a connection option for an electrical supply on an outer surface 183 and an electrical connection, for example of an electrical internal component of the electrical appliance (not shown), on an inner surface 181.
[0048]
[0036] The connection device 101 has a housing 103 which has a cavity 105 on its inner side 181. For example, the connection device 101 is manufactured as an injection-molded component from a thermoplastic material.
[0037] A block connector 161 of a take-off line 163 can be inserted into a dispensing socket 123, which is formed in the cavity 105. The take-off line 163 serves to supply the electrical device with power internally. The block connector 161 can, for example, be a RAST5 connector or conform to another standard.
[0049]
[0038] A supply plug 121 on the underside of the connection device 101, on the other hand, serves to supply the electrical device from the outside, for example with mains voltage .
[0050]
[0039] Between the output socket 123 and the input plug 121, a grounding conductor contact 131, a neutral conductor contact 133, a phase conductor contact 135, a phase conductor contact 137, and a phase conductor contact 139 are arranged side by side in a geometrically defined manner. It should be noted that, for example, the phase conductor contact 137 and / or the phase conductor contact 139 may be optional. For connections with fewer than three phases, individual phase conductor contacts may also be omitted. The arrangement is geometrically selected such that it corresponds, for example, to the block connector 161 of the output line 163, so that the block connector 161 can be inserted into the output socket 123 for the common connection of all electrical supplies. The same applies to the input plug 121.
[0051]
[0040] Using the earthing conductor contact 131 as an example, the corresponding contacts are explained in detail as follows:
[0041] The earthing conductor contact 131 has an output contact 143 in the output socket 123 and an input contact 141 in the input plug 121. The respective contacts are stamped as sheet metal contacts, for example as plug contacts in the 6.3 mm format.
[0052]
[0042] Unlike the other contacts, the grounding conductor contact 131 has an additional upward extension in the form of a housing grounding contact 145, which, when the connecting device 101 is inserted into the opening 193 of the housing sheet 191, automatically makes electrical contact between the housing sheet and the grounding conductor contact via a housing clamp 147, thus enabling, for example, the grounding and dissipation of high-frequency interference signals from the housing sheet 191. The neutral conductor contact 133, the phase conductor contact 135, and the phase conductor contacts 137 and 139 naturally do not have this contact to the housing grounding.
[0053]
[0043] In the feed plug 121, the corresponding contacts are then available at the same distance as in the output socket 123, so that a supply socket 201 can be inserted into the feed plug 121 .
[0054]
[0044] For this purpose, openings 111 and 115 are provided in the feed plug 121 of the connection device 101, into which corresponding retaining lugs 211 of the supply socket 201 can engage. The retaining lugs 211 are mounted on spring bars 217, so that automatic locking occurs when the supply socket 201 is inserted. It should be noted that the connection, due to the recessed arrangement of the retaining lugs 211 within the connection device 101, can only be released again with a suitable tool. The supply socket 201 is constructed from a lower shell 203 and an upper shell 205 and is thus composed of two shells; a supply line 207 is clamped on the rear side between the lower shell 203 and the upper shell 205 for strain relief. The lower shell 203 and the upper shell 205 are irreversibly connected to each other, for example by means of screws which have a drive only in the fixed direction (see Fig. ).2) or also by means of a snap-fit connection. Inside, the supply line 207 then leads, corresponding to the contacts of the connection device 101, to an earthing conductor socket 231, a neutral conductor socket 233, and phase conductor sockets 235, 237, and 239.
[0055]
[0045] In a mounted position 301, the power socket 201 is firmly inserted into the connection device 101, so that the respective contacts are connected to each other and the electrical device can be supplied with power from a mains socket by means of a connector 403 mounted on the opposite side of the power supply line 207. The power socket 201, power supply line 207 and connector 403 thus form a connection cable 401, which can, for example, be provided pre-assembled for corresponding country specifications.
[0056]
[0046] It should be mentioned that the supply socket 201 has a mechanical coding 225 which corresponds to a corresponding mechanical coding 125 within the supply plug 121 in the connection device 101. By means of the mechanical codings 125 and 225, for example, the compatibility of the supply socket 201 and the connection device 101 can be determined with respect to a maximum operating temperature or, for example, the number of phase contacts for supplying the electrical device.
[0057]
[0047] It should also be mentioned that the connection device 101 has a contour 151 on its inner surface 181, which corresponds to a corresponding contour in the housing sheet 101, namely a contour of the opening 193, and thus enables geometrically correct positioning of the connection device 101 in the housing sheet 191. Noses 153 in the area of the housing grounding 145 of the connection device 101 allow the connection device 101 to be inserted at an angle and engage within the opening 193 in the housing sheet 191 by means of the noses 153, whereby pivoting and pressing in the connection device 101 then enables it to lock into place with opposing locking lugs 155, which are arranged on a common spring bar 157. The locking lugs 155 are located opposite the noses 153.
[0058] Reference character list
[0059] 101 Connection device
[0060] 103 cases
[0061] 105 Cavity
[0062] 111 Opening
[0063] 115 Opening
[0064] 121 feed plugs
[0065] 123 Dispensing box
[0066] 125 mechanical coding
[0067] 131 Earthing conductor contact
[0068] 133 Neutral contact
[0069] 135 Phase conductor contact
[0070] 137 Phase conductor contact
[0071] 139 Phase conductor contact
[0072] 141 Feed contact
[0073] 143 Delivery contact
[0074] 145 Housing grounding
[0075] 147 Housing clamp
[0076] 151 contour
[0077] 153 Nose
[0078] 155 Rastnase
[0079] 157 spring bar
[0080] 161 block connectors
[0081] 163 Acceptance line
[0082] 181 Inside
[0083] 183 Outside
[0084] 191 Housing sheet
[0085] 193 Breakthrough 201 Supply socket
[0086] 203 Lower shell
[0087] 205 Upper shell 207 Supply line
[0088] 211 Retaining nose
[0089] 217 spring bar
[0090] 225 mechanical coding
[0091] 231 Earthing conductor socket 233 Neutral conductor socket
[0092] 235 Phase conductor socket
[0093] 237 Phase conductor socket
[0094] 239 Phase conductor socket
[0095] 301 Mounted position 401 Connection cable (supply line)
[0096] 403 plug
Claims
Patent claims:
1. Connection device (101) for providing an electrical connection to an electrical appliance, in particular to a stove or oven, wherein the connection device has several connection contacts (131, 133, 135, 137, 139) and can be mounted in an opening (193) of an outer wall (191) of the electrical appliance by means of a mounting fixing (151), and in a mounted position (301) respective supply contacts (141) of the connection contacts (131, 133, 135, 137, 139) are provided on an outer side (183) of the electrical appliance and respective output contacts (143) of the connection contacts (131, 133, 135, 137, 139) are provided on an inner side (181) of the electrical appliance, wherein the supply contacts (141) are for connecting a supply line (207) with several supply conductors and the Delivery contacts (143) are set up for connecting a delivery line (163) with multiple delivery lines,so that, after connecting the supply line (207) and the output line (163), it is possible to supply the electrical device with electrical power from the supply line (207) via the connection contacts (143) of the connection device, characterized in that the output contacts (143) are positioned relative to each other in a defined manner by means of an output socket (123), so that a common contact of the connection contacts (131, 133, 135, 137, 139) is made possible by inserting an output plug (161) corresponding to the output socket (123) into the output socket (123). Connection device according to claim 1, characterized in that the feed contacts (141) are defined relative to each other by means of a feed plug (121). are positioned so that a common contact of the connection contacts (131, 133, 135, 137, 139) is made possible by inserting a supply socket (201) corresponding to the feed plug (121) into the feed plug.
3. Connection device according to one of claims 1 or 2, characterized in that the multiple connection contacts (131, 133, 135, 137, 139) have a earthing conductor contact (131), a neutral conductor contact (133), a first phase contact (135) and in particular a second phase contact (137) and / or a third phase contact (139), wherein on the outside (183) there is a supply earthing conductor contact (141), a supply neutral conductor contact, a first feed phase contact, a second feed phase contact and / or a third feed phase contact and on the inside (181) a discharge earth conductor contact (143), a discharge neutral conductor contact, a first A second submission phase contact and / or a third submission phase contact are provided.
4. Connection device according to one of the preceding claims, characterized in that the respective connection contacts (131, 133, 135, 137, 139) are designed as planar contacts, wherein the supply contacts (141) and / or the output contacts (143) are designed as flat plug contacts.
5. Connection device according to one of the previous Claims characterized in that the dispensing socket (123) and / or the feed plug (121) has or have a mechanical coding (125, 225), wherein the mechanical coding (125, 225) is a Coding information for a number of phases, a The voltage value and / or maximum operating temperature of the connection device is represented, wherein a dispensing plug corresponding to the output socket (123) and / or a supply socket corresponding to the input plug (121) can only be inserted if a corresponding coding information matches.
6. Connection device according to claim 5, characterized in that the mechanical coding (125, 225) comprises a change in circumference and / or a change in contour of the output socket (123) and the corresponding output plug and / or the input plug (121) and the corresponding supply socket (201), wherein the respective mechanical coding (125, 225) in particular represents a maximum operating temperature of the connection device, a maximum permissible current of the connection device and / or a number of phases of the output line (163) and / or the supply line (207).
1. Connection device according to one of the preceding claims 3 to 6, characterized in that the earthing conductor contact (131) has an electrical comprising a contacting device (145), wherein the electrical contacting device (145) contacts the housing (191) of the electrical device in the mounted position (301) of the connection device, wherein the electrical contacting device (145) is in particular designed as a one-piece extension of the earthing conductor contact (131).
8. Connection device according to one of the previous Claims characterized in that the Mounting fixing (151) for fixing the Connection device in the opening (193) of the housing as Click fixing, ratchet fixing and / or as Screw fixing is formed.
9. Connection arrangement for an electrical appliance, in particular for a stove or an oven, comprising a connection device (101) according to one of the preceding claims and a pre-assembled take-off cable (163) with a take-off plug (161).
10. Connection arrangement according to claim 9 with a with a Power socket (201) pre-assembled Supply line (207) .
11. Connection arrangement according to claim 9 or 10, characterized in that the pre-assembled The supply line (401) has a protective contact plug (403) at one end opposite the supply socket (201) and / or the pre-assembled The take-off line (161) has a take-off plug designed as a block plug (161).
12. Electrical appliance, in particular stove or oven, with a connection device (101) according to one of the preceding claims 1 to 8 or a connection arrangement according to one of claims 9 to 12.