Wire connection contact element

Abstract

The present invention relates to a wire connecting contact element for clamping an electrical wire, wherein the wire connecting contact element has a spring-type terminal, the spring-type terminal has a clamping position for fixing and clamping the electrical wire, the wire connecting contact element has a first SMD soldering contact, the first SMD soldering contact is arranged on the mounting side of the wire connecting contact element and is constructed for soldering to a contact surface of a circuit board, wherein the wire connecting contact element also has a wire introduction area formed by a sheet metal part of the wire connecting contact element, the wire introduction area has a wire guide bottom, the wire guide bottom is oriented obliquely to the wire introduction direction, a material section of the sheet metal part that is present in the wire introduction area and protrudes from the wire guide bottom is bent toward the plane of the mounting side via a bending area to form the first SMD soldering contact, and a sub-area of ​​the wire guide bottom oriented obliquely to the wire introduction direction is adjacent to at least one bending area.

Description

[0001] This application is a divisional application of an application with a filing date of February 14, 2018, a national application number of 201810151959.3, and an invention name of “Wire connection contact element”. Technical Field

[0002] The present invention relates to a wire connection contact element for clamping an electrical wire, wherein the wire connection contact element has at least one spring-type terminal, the spring-type terminal having a clamping position for fixing and clamping the electrical wire, and wherein the wire connection contact element is configured as a wire connection contact element that can be surface mounted (SMD) on a circuit board, the wire connection contact element having at least one first SMD soldering contact, the SMD soldering contact being arranged on a mounting side of the wire connection contact element and being configured for soldering to a contact surface of the circuit board, wherein the wire connection contact element further has a wire introduction area formed by a sheet metal part of the wire connection contact element, the wire introduction area having at least one wire guide bottom, the wire guide bottom being oriented obliquely to a wire introduction direction in order to form a guide surface for an electrical wire to be introduced. Background Art

[0003] Conductor connection contact elements with spring-type terminals are used in many forms. Current conductor connection contact elements are arranged and designed to be built directly onto a circuit board and soldered onto the circuit board, as is known from SMD electronics (SMD-surface mounted devices). Therefore, current conductor connection contact elements can be referred to as SMD conductor connection contact elements. With such conductor connection contact elements, it is possible to simply clamp an electrical conductor onto a circuit board by means of a spring clamp and thus electrically contact the circuit board. The conductor connection contact element can in particular be designed as a housing-less conductor connection contact element, i.e. without using a surrounding insulating material housing.

[0004] An SMD conductor connection contact element is known from DE 10 2013 111 649 A1. Summary of the invention

[0005] Based on the above, the invention is based on the object of providing an improved conductor connection contact element for clamping an electrical conductor.

[0006] The object is achieved by means of the wire connection contact element proposed at the beginning in the following manner: the material section of the sheet metal part that is present in the wire introduction area and extends from the wire guide bottom is bent into a first SMD soldering contact via at least one bending area in the direction of the plane of the installation side, and at least one sub-area of ​​the wire guide bottom oriented obliquely to the wire introduction direction is adjacent to at least one bending area. The present invention has the following advantages: such a wire connection contact element can expand the first SMD soldering contact that is arranged relatively far in front with respect to the wire introduction direction. By realizing the material section of the sheet metal part extending from the wire guide bottom in the wire introduction area, the first SMD soldering contact can be realized in a simple and cost-effective manner, and the material section is formed, i.e. bent, into the first SMD soldering contact via at least one bending area. Therefore, the first SMD soldering contact can be formed in one piece with the sheet metal part or the wire guide bottom. The first SMD soldering contact is bent relative to the wire guide bottom via the bending area. The material section of the sheet metal part extending from the wire guide bottom can be bent into the first SMD soldering contact via one or more bending areas. According to the number of bending areas, the material section can therefore also be bent multiple times.

[0007] Furthermore, in the conductor connection contact element according to the invention, at least one subregion of the conductor guide base oriented obliquely to the conductor insertion direction is adjacent to at least one bending region, i.e., an additional oblique conductor guide in the form of a conductor insertion funnel is present via the subregion. Accordingly, the at least one bending region does not have to adopt this technical concept of the conductor guide or at least does not have to adopt it separately, which has the advantage that the conductor guide base can be optimized separately for advantageous conductor guidance independently of the design of one or more bending regions. The mentioned subregion of the conductor insertion base oriented obliquely to the conductor insertion direction can be arranged in the conductor insertion direction, in particular behind the first SMD solder contact, or at least behind the at least one bending region.

[0008] Here, the term "adjacent" includes the following possibilities: at least one sub-region of the wire guiding bottom oriented obliquely to the wire insertion direction is directly adjacent to the at least one bending region, i.e. is directly connected thereto, or is spaced apart therefrom via other connecting regions, so that the sub-region of the wire guiding bottom oriented obliquely to the wire insertion direction can also be spaced apart from the at least one bending region.

[0009] As mentioned, the wire guide bottom is oriented obliquely to the wire introduction direction in order to form the guide surface of the electric wire to be introduced. In this way, the wire guide bottom forms a wire introduction inclined portion, which makes it easy for the electric wire to be introduced into the wire connection contact element and makes it easy to continue to guide it to the clamping position. For example, the wire guide bottom can be inclined at an angle of 10° to 60° relative to the supporting surface of the first SMD soldering contact, wherein the angle data relates to a circle value of 360°. The wire guide bottom oriented obliquely to the wire introduction direction can be formed flatly or arched, for example gradually rising in the wire introduction direction. However, it is particularly advantageous that the flat configuration of the wire guide bottom is formed as a slope rising along the wire introduction direction.

[0010] The material section extending from the wire guide bottom for forming the first SMD soldering contact can extend from the wire guide bottom opposite to the wire insertion direction, or in other words, extend from the wire guide bottom backwards along the wire insertion direction. There can also be two material sections extending from the wire guide bottom, one of which extends from the wire guide bottom opposite to the wire guiding direction, and the other extends from the wire guide bottom along the wire guiding direction. In this case, each of the material sections can be bent into an SMD soldering contact, so that a plurality of SMD soldering contacts can also be formed on the wire guide bottom in one piece.

[0011] By means of the first SMD soldering contact arranged relatively far forward with respect to the wire insertion direction on the wire connection contact element, the stability of the mechanical fixation can be increased in the wire insertion region when the wire connection contact element is SMD soldered to the circuit board. As a result, in particular transverse forces exerted by the wire on the wire connection contact element can be better compensated. Thus, in particular, it can be avoided that the wire connection contact element bends in the front region, i.e. in the wire insertion region, and that the already introduced electrical wire can slip out of the clamping location.

[0012] The wire connection contact element can have one or more further SMD soldering contacts in addition to the first SMD soldering contact, in particular an SMD soldering contact arranged behind the first SMD soldering contact in the wire insertion direction, said SMD soldering contact being spaced apart from the first SMD soldering contact. As a result, the mechanical fixing of the wire connection contact element to the circuit board can be further improved. It is particularly advantageous if, in addition to the first SMD soldering contact, at least one second SMD soldering contact arranged further behind in the wire insertion direction is arranged on the wire connection contact element in order to fix the wire connection contact element to the circuit board particularly reliably.

[0013] The wire guide base can be oriented in particular toward the mounting side of the wire connection contact element, for example so that the wire connection contact element has a bottom side and an upper side forming the mounting side. In this case, the wire guide base is arranged closer to the bottom side than to the upper side. In an advantageous development, the wire guide base is spaced apart from the plane of the mounting side. With this spacing, at least one bending region can be realized in an especially advantageous manner.

[0014] The first SMD solder contact can have a bearing surface which is designed to bear against a contact surface of a printed circuit board. The bearing surface can be spaced apart from the conductor guide base via at least one of the bending regions.

[0015] According to an advantageous improvement of the present invention, the support surface of the first SMD soldering contact is formed by the end surface of the end side of the material section of the sheet metal part extending from the wire guide bottom or by the surface of the material section connected to the outer side of at least one bending area. When the SMD soldering contact is soldered to the contact surface, it is wetted with solder on the support surface and / or on the edge area around the support surface. The support surface can therefore be supported either directly on the contact surface or by means of a corresponding solder layer between the support surface and the contact surface.

[0016] If the end face of the end side forms the bearing surface, this has the advantage that the material section of the sheet metal part that is required to form the SMD solder contact and that protrudes from the conductor guide base can be kept short. Accordingly, the additional material requirement is small, so that the usual board sizes and machines can be further used for board processing.

[0017] If the contact surface is formed by a surface of the material portion adjoining the outer side of the at least one bending region, a relatively large soldering surface parallel to the circuit board is provided, which ensures particularly secure holding of the SMD solder contact on the circuit board.

[0018] Such a large welding surface with the advantage of particularly secure holding can also be achieved in that the contact surface is formed by the surface of the mentioned material portion adjoining the inner side of the at least one bending region.

[0019] According to an advantageous development of the invention, it is provided that the material section of the sheet metal part protruding from the conductor guide base is bent via just one bending region or via two bending regions with opposite bending directions to form a first SMD soldering contact. This allows the conductor connection contact with one or more bending regions to be produced simply on conventional sheet metal processing machines. If there are two bending regions with opposite bending directions, the bending regions can be bent, for example, substantially in an S-shape in a side view.

[0020] According to an advantageous development of the invention, the conductor connection contact element has a conductor insertion channel in the conductor insertion region, the conductor insertion channel having a conductor guide bottom. Such a conductor insertion channel has the advantage that, by having the walls of the conductor insertion channel surround the conductor insertion region, the conductor to be introduced can be guided to the clamping point in a targeted manner from all sides, thereby additionally supporting the introduction of the electrical conductor.

[0021] According to an advantageous improvement of the present invention, the clamping location is arranged behind the wire guide bottom and / or behind the first SMD soldering contact piece in the direction of wire insertion. Accordingly, the clamping location is arranged relatively far behind in the wire connection contact element in the direction of wire insertion, for example, in the middle or approximately behind the middle.

[0022] According to an advantageous improvement of the present invention, it is proposed that the first SMD soldering contact protrudes from the wire guide bottom beyond the wire introduction region of the wire connection contact element in the opposite direction of the wire introduction. This allows the first SMD soldering contact to be soldered to the circuit board in a particularly simple manner. Alternatively, the first SMD soldering contact can also be configured so that it does not protrude from the wire guide bottom beyond the wire introduction region of the wire connection contact element in the opposite direction, or substantially in the opposite direction, of the wire introduction. This allows the wire connection contact element to be configured as a particularly short embodiment.

[0023] According to an advantageous improvement of the invention, it is proposed that the conductor guide base is formed by at least two mutually separated material sections of a sheet metal part or different sheet metal parts, and the first SMD soldering contact is formed by an extended material section of one sheet metal part or two sheet metal parts. This further improves the feasibility of realizing the first SMD soldering contact. In particular, the use of sheet metal parts further improves the flexibility when manufacturing the conductor connection contact element.

[0024] According to an advantageous improvement of the present invention, the wire connection contact element has a second SMD soldering contact, which is arranged behind the first SMD soldering contact in the wire insertion direction. Therefore, the wire connection contact element can be soldered to the circuit board at at least two locations, so that the mechanical stability of the wire connection contact element on the circuit board is further improved.

[0025] According to an advantageous improvement of the present invention, it is proposed that the wire connection contact element has a busbar piece as part of a spring-type terminal for clamping an electrical conductor, the busbar piece is formed by a sheet metal part of the wire connection contact element, or is composed of another sheet metal part, the other sheet metal part having a first side wall and a second side wall opposite to the first side wall, a bottom section extending from the first side wall to the opposite second side wall, and a cover section opposite to the bottom section and extending from the first side wall to the opposite second side wall, wherein the side wall and the cover section and the bottom section or the wire guide bottom form a wire introduction channel, and the wire connection contact element has a clamping spring arranged on the busbar piece, the clamping spring has a contact section at a first end region and a clamping section for clamping the electrical conductor at a second end region opposite to the first end region, the clamping section having a clamping edge, wherein the contact section is arranged on the bottom section of the busbar piece, and wherein the clamping section extends toward the cover section with its freely movable end. In this way, the conductor connection contact element can be realized in an efficient and cost-effective manner with respect to the conductor insertion channel and the spring-type terminal. In addition, the installation effort for the individual components is low. In particular, the clamping spring can be designed as a separate component, that is, a component separate from the busbar part. The busbar part can be formed in one piece from a sheet metal part or in multiple pieces from a plurality of sheet metal parts. Thus, for example, a conductor connection contact element can be realized with only two separate components, namely with the busbar part and the clamping spring.

[0026] The wire connection contact element can be designed in particular such that the bottom section has at least one recess, which is arranged between the first SMD solder contact and the second SMD solder contact. The recess can extend in particular over the entire width of the wire connection contact element, i.e. at least from the first side wall to the opposite second side wall. In this way, the first SMD solder contact is only indirectly mechanically and electrically connected to the second SMD solder contact, i.e. not or substantially not via the bottom section, but via one or more of the components, i.e. the first side wall, the second side wall, the cover section. The recess provides in particular a free space in which multiple components of the clamping spring, for example a component of the spring bow, can be arranged in a space-saving manner.

[0027] The second SMD solder contact can be arranged in particular within a tunnel-shaped region of the conductor connection contact element formed by the base section, the cover section and the first and second side walls, for example so that the second SMD solder contact does not protrude rearwardly (as viewed in the conductor insertion direction) beyond the side walls and the cover part. The second SMD solder contact can in particular be part of the base section.

[0028] According to an advantageous development of the invention, it is provided that, viewed transversely to the conductor insertion direction of the clamping section, an actuating section accessible by an actuating tool is provided next to the clamping edge in the direction of the side wall. The conductor connection contact element is formed on the clamping section by means of the actuating section, so that the clamping point for clamping the electrical conductor can be opened by applying a force to the actuating section by means of the actuating tool. In this case, the clamping edge of the clamping section moves away from the cover section of the busbar piece, which is located next to the actuating section.

[0029] The actuation section can have an actuation plate which projects laterally from the first side wall. This does not exclude that the actuation section has another actuation plate which likewise projects laterally from the clamping section on the opposite side.

[0030] In this connection, the indefinite article "a" is not to be understood as a numeral within the context of the present invention.

[0031] According to an advantageous development of the invention, it is provided that the wire guide element adjacent to the clamping section is formed on the first side wall, wherein the wire guide element has a section of the first side wall which is oriented obliquely in the direction of the opposite second side wall. By means of the wire guide element oriented obliquely on the first side wall in the direction of the opposite second side wall, the electrical conductor is moved laterally toward the clamping edge and thereby prevented from reaching the region of the actuation section as a whole or, if appropriate, the strands of the thin electrical conductor.

[0032] Thus, by means of the wire guiding element on the first side wall, a section of the side wall is provided for guiding the electrical wire to be clamped toward the clamping edge. Furthermore, by means of the wire guiding element of the first side wall, when viewed in the wire insertion direction, an actuation section of a clamping spring is covered, the clamping spring having clamping and actuation sections arranged next to one another. This results in an extremely compact and reliable wire connection contact element, the clamping point of which can be displaced in the direction of the base section by means of an actuating tool in order to open the clamping point.

[0033] The operating tool can be placed on the wire connection contact element by the operating plate extending from the side wall. To this end, the operating tool is set on the operating plate and the force for opening the clamping position is applied to the operating plate. Here, the operating tool is preferably a screwdriver, but can also be the user's finger.

[0034] The wire connection contact element can have an opening on the first side wall for passing the operating plate. The wire guide element is oriented in such a way that it points away from the end edge of the first side wall that delimits the opening and is opposite to the wire guide element. This prevents the electrical wire introduced into the wire introduction channel and to be clamped from resting as a whole or with its strands on the end edge of the first side wall that is exposed through the opening. The wire guide element thus keeps the opening with the end edge that delimits the opening from being reached by the electrical wire introduced and to be clamped.

[0035] The wire guide element can be designed as a material spring of the first side wall, which is oriented obliquely in the direction of the second side wall and is to be oriented toward the clamping section. Here, the material spring is not connected to the bottom section and the cover section. More precisely, the material spring is not bound by the bottom section and the cover section. Here, the material spring can be located in the intermediate space between the cover section and the clamping section, so that the clamping spring is positioned between the bottom section and the material spring. Thus, a free space for the clamping spring is provided between the bottom section and the cover section, which free space is partially closed by at least one material spring in order to provide a wire guide.

[0036] The operating section can have an operating plate extending in the direction of the plane of the cover section. The operating plate is then arranged offset beside the clamping edge along the extension direction of the clamping section. Therefore, the point of action for the operation is shifted toward the upper side of the cover section of the wire connection contact element.

[0037] However, it is also conceivable for the actuation section to have an actuation plate which is arranged laterally in an opening in the first side wall, which opening is arranged behind the exposed end of the wire guide element as viewed in the wire insertion direction and is accessible from the outside.

[0038] The end stop can be formed at the rear end of the busbar piece, which is opposite the conductor insertion channel, by a material flange bent from the side wall, from the bottom section or from the cover section. Thus, the sheet metal part of the busbar piece can be shaped in a very simple manner so that the conductor receiving recess is formed.

[0039] It is conceivable here to bend mutually oriented material flanges from the two walls in order to form the end stop.

[0040] The contact section can be clamped between the side wall and the bottom section. Therefore, the clamping spring can be clamped on the busbar piece in a simple manner and fixed in position there.

[0041] However, it is also conceivable that the contact section is fixed in position on the busbar part by means of a fixing section which projects from the contact section into the opening of the base section or by means of a fixing section which projects from the base section into the opening of the contact section. The fixing section can be a strap or a stamping or the like. Thus, after the clamping spring has been suspended in the busbar part, it is possible to prevent the clamping spring from slipping out in a simple manner.

[0042] The clamping spring can have a spring bow connecting the contact section with the clamping section and thus be designed, for example, as a U-shaped bent leg spring. Then, viewed in the direction of the wire insertion, the wire guide bottom is arranged in front of the spring bow from at least one side wall and is bent in the direction of the opposite side wall. The wire guide bottom is used to guide the electrical wire past the spring bow to the clamping section. For this purpose, the wire guide bottom is oriented obliquely in the wire insertion direction in a manner pointing toward the cover section. The wire guide bottom can be realized quite simply from a sheet metal part by bending a section from the side wall.

[0043] The cover section or the bottom section can have a solder connection area. The solder connection area can be used, for example, as a solder connection piece that is not bound by the cover section or the bottom section. However, it is also conceivable that the parts of the cover section or the bottom section themselves are used for soldering on the circuit board.

[0044] On the side wall there is an overload stop, for example in the form of an overload stop strap which projects from the side wall and extends in the direction of the opposite side wall and is positioned in the space between the clamping section and the base section. Such a strap can also be formed very easily from sheet metal parts by being bent in the section of the side wall forming the lateral opening so as to point into the interior of the cage-shaped conductor connection contact element. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The present invention will be described in detail below based on the embodiments using the accompanying drawings. The accompanying drawings show:

[0046] Figure 1 A perspective view showing a first embodiment of a wire connection contact element, and

[0047] Figure 2 Show Figure 1 A side view of a wire connecting contact element, and

[0048] Figure 3 Show Figure 1 A front view of a wire connection contact element, and

[0049] Figure 4 A perspective view showing a second embodiment of a wire connection contact element, and

[0050] Figure 5Show Figure 4 A side view of a wire connecting contact element, and

[0051] Figure 6 A side view showing a third embodiment of a wire connection contact element, and

[0052] Figure 7 A perspective view showing a fourth embodiment of a wire connection contact element, and

[0053] Figure 8 Show Figure 7 A side view of a wire connecting contact element, and

[0054] Fig. 9 Shows penetration Figure 8 A side cross-sectional view of a wire connection contact element, and

[0055] Fig.10 Show Figures 7 to 9 A three-dimensional view of the clamping spring of the conductor connection contact element in FIG.

[0056] In the figures, the same reference numerals are used for elements that correspond to each other. DETAILED DESCRIPTION

[0057] Figure 1 A perspective view of a first embodiment of a conductor connection contact element 1 is shown, which is formed by a busbar piece 2 and a clamping spring 3 inserted therein. The busbar piece 2 is formed in a cage-like manner from a sheet metal part. The busbar piece has a first side wall 4 and an opposite second side wall 5. The two side walls 4 and 5 are connected to one another via a cover section 6. In the illustrated embodiment, the cover section 6 is formed integrally with the two side walls 4 and 5 by bending them.

[0058] Opposite the cover section 6, the busbar element 2 has a bottom section 7, which likewise extends from the first side wall 4 to the second side wall 5. The bottom section 7 is formed by folding the second side wall 5 and is butted against the first side wall 4. The bottom section is therefore not connected to the first side wall 4 in a materially bonded manner. Conversely, the bottom section 7 can also be formed by folding the first side wall 4 and extending to the second side wall 5, or also by a combination of these two options.

[0059] A conductor insertion channel 8 is enclosed by first and second side walls 4 and 5 spaced apart from one another and cover and base sections 6 and 7 extending transversely thereto and likewise spaced apart from one another, and is provided for introducing and guiding electrical conductors and for accommodating the clamping spring 3 .

[0060] The clamping spring 3 is designed as a U-shaped bent leg spring, which has a contact section 9 supported on the base section 7, a spring bow 10 connected thereto, and a clamping section 11 extending in the wire insertion direction L, i.e. in the direction of the wire insertion channel 8 or obliquely into the wire insertion channel 8. The clamping section 11 extends with its freely movable end toward the cover section 6.

[0061] It is clear that the first side wall 4 has an opening 12 for passing an actuating plate 13 protruding laterally from the clamping section 11. By applying an actuating force to the actuating plate 13, the clamping section 11 can be displaced in the direction of the contact section 9 against the spring force of the clamping spring 3. As a result, the clamping point formed between the clamping edge of the clamping section 11 and the busbar piece 2 for clamping an electrical conductor is opened.

[0062] The actuating plate 13 forming the actuating section is located next to the clamping edge when viewed transversely to the longitudinal extension direction of the clamping section 11. Figure 3 It is shown that a conductor guide element 34 is adjacent to the clamping section 11 located in the interior of the busbar piece 2 and is formed on the first side wall 4. For this purpose, a section of the first side wall is oriented obliquely in the direction of the opposite second side wall 5 and in the direction of the clamping section 11, which section is located between the insertion region of the clamping section 11 and the actuation section. The electrical conductor introduced into the conductor insertion channel 8 is guided toward the clamping edge by means of the conductor guide element 34 and prevented from reaching the actuation section and, if necessary, from escaping from the busbar piece 2 through the opening 12 in the region of the actuation plate 13.

[0063] It is also evident that on the first side wall 4 there is an overload stop 15, for example in the form of an overload stop strap pointing towards the second side wall 5, which forms an end stop for the clamping section 11. The clamping section can only be pressed down in the direction of the contact section 9 until it strikes the overload stop 15.

[0064] The clamping spring 3 is also fixed in position on the busbar 2 by means of the overload stop 15. This position fixing is also achieved by means of an opening 16 or a cavity in the contact section 9, into which the strap 45 or the embossing of the bottom section 7 sinks. Figure 1 and 4 As indicated, the strap 45 can be formed in the form of a material flange which is punched out and bent from the base section 7. Alternatively, the contact section 9 can also be welded, riveted, screwed or fastened to the base section 7 in another manner.

[0065] It is also obvious that in the illustrated embodiment, a conductor guide bottom 17 is bent from one of the two side walls 4 and 5 in the region directly in front of the spring bow 10. The plate section of the busbar piece 2 forming the conductor guide is oriented obliquely to the conductor insertion direction L in a manner directed toward the cover section 6. As a result, a funnel-shaped conductor insertion channel 8 is realized in this region, wherein the electrical conductor is guided at least in the lower region beside the spring bow 10 through a plane extending obliquely toward the clamping section 11. Thus, in this front region of the conductor connection contact element 1, the conductor insertion channel 8 is enclosed by the first and second side walls 4 and 5 spaced apart from each other and the cover section 6 extending transversely thereto and the conductor guide bottom 17 spaced apart therefrom.

[0066] It is also obvious that the cover section 6 has narrow straps 18a, 18b protruding from the cover section 6 at the end regions opposite to each other, which are used for connecting the busbar piece 2 in the production tool during production. The wire connection contact element 1 is soldered to the circuit board on the mounting side 61, for example on the underside of the bottom section 7. The upper side of the cover section 6 is formed as a flat suction surface with a suction clamp for the automatic assembly of the circuit board. However, the wire connection contact element 1 can also be laid on the circuit board by means of the cover section 6 and there soldered to the printed conductors (Leiterbahn) on the circuit board by means of the straps 18a, 18b. The straps 18a, 18b then form a solder connection area.

[0067] It can also be seen that an end stop 19 is formed at the rear end of the busbar piece 2, which is opposite the conductor insertion channel 8, by a material flange bent from at least one of the side walls 4, 5. It is clear that in order to form the end stop 19, the material flange is bent from the first side wall 4 in the direction of the opposite second side wall 5.

[0068] from Figure 2 Visible in Figure 1 1. It is obvious here that the overload stop 15 is directly adjacent to the contact section 9. As a result, the clamping spring 3 is prevented from moving in the wire insertion direction L.

[0069] It can also be seen that the wire guide base 17 is positioned in front of the spring bow 10 as viewed in the wire insertion direction L and is oriented obliquely so that the wire guide base 17, which is indicated by the bent fold, is guided approximately forwards above the transition between the spring bow 10 and the clamping section 11 connected thereto. The electrical wire is thus reliably guided onto the plane of the clamping section 11 without contacting the spring bow 10. The wire guide element 34 formed on the first side wall 4 then extends at a distance therefrom. The wire guide element is formed from the first side wall 4 in the direction of the opposite second side wall 5. The wire guide element is connected to the first side wall 4 in a materially bonded manner and can be cut out in a sub-region of the first side wall 4, for example in an upper section. The wire guide base 17 can be bent selectively from the first side wall 4 or the second side wall 5.

[0070] It is also clear that the operating plate 13 present on the operating section projects laterally from the opening 12 and that the opening 12 enables an unimpeded movement of the clamping section 11 in the direction of the contact section 9 in order to open the clamping point. The overload stop 15 also does not hinder the operating plate 13. Rather, the path of the clamping section 11 is limited by the overload stop by the region of the clamping section 11 connected to the operating plate, which has a clamping edge. The operating plate 13 has a slightly curved end section 130 that projects out of the opening 12 in the wire insertion direction L, by which the manual operability of the operating plate 13 is further improved.

[0071] The conductor connection contact element 1 has a first SMD soldering contact 60 and a second SMD soldering contact 65 on its mounting side 61, on which the conductor connection contact element can be soldered to a circuit board. The first SMD soldering contact 60 is arranged near the location at which an electrical conductor can be introduced into the conductor connection contact element, and the second SMD soldering contact 65 is arranged further behind, for example, below the contact section 9 of the clamping spring 3 or also behind it. Between the first SMD soldering contact 60 and the second SMD soldering contact 65, the bottom section 7 is not designed to be continuous, but has an interruption or recess 66, which extends over the entire width of the conductor connection contact element 1.

[0072] The first SMD solder contact 60 is formed by an extended material section 62 of the busbar element 2, which protrudes from the conductor guide base 17 in the conductor insertion area 14, in particular opposite to the conductor insertion direction L. The material section 62 is first bent via a bending area 63 in the direction of a printed circuit board or mounting side 61, not shown in detail. Figures 1 to 3In the embodiment of the present invention, the material section 62 is bent at an angle greater than 90° via a bending area 63 to form a first SMD solder contact 60. Here, the first SMD solder contact 60 has a support surface 64, which is designed to be supported on a contact surface of a circuit board. Advantageously, the support surface 64 is in a plane with a support surface of the second SMD solder contact 65 present on the mounting side 61. Here, the free end of the material section 62 points in the direction of the second SMD solder contact 65 or extends in the wire insertion direction L.

[0073] As in Figures 1 to 3 In the embodiment of FIG. 1 , it can be seen that the material section 62 bent into the first SMD solder contact 60 is relatively long. In order to save material, the material section 62 can also be kept shorter, as in FIG. Figure 4 and 5 . It can be seen that the material section 62 is bent again via a bending region 63 from the conductor guide base 17 in the direction of the mounting side 61, wherein in this case the bending region 63 has a curvature of less than 90°. In this case, the end face of the end face of the material section 62 forms a bearing surface 64, which in this case can also be arranged in the same plane as the bearing surface of the second SMD solder contact 65.

[0074] Figure 6 Another embodiment is shown, in which the first SMD soldering contact is bent via two bending regions 63 with opposite bending directions into the first SMD soldering contact 60. In this case, a longer material section 62 is again required, which is similar to Figures 1 to 3 An implementation method, wherein Figures 1 to 3 In contrast to the embodiment of the present invention, the other (opposite) surface side of the material section 62 forms the support surface 64. Therefore, the free end of the material section 62 extends opposite to the wire insertion direction L. Figures 1 to 3 In the embodiment of FIG. 1 , the support surface is formed by the surface side of the conductor guiding bottom 17 or the material section 62 which also guides the electrical conductor to be introduced, while in FIG. Figure 6 In an embodiment of the present invention, it is the surface side facing away from it.

[0075] Figures 7 to 9 Another embodiment of a first SMD solder contact 60 is shown at least in a side view, having a Figure 4 and 5 The embodiment of the present invention is similar to the shape of the embodiment of the present invention. Figures 7 to 8In the embodiment, the busbar piece is formed such that the conductor guide base 17 is formed in two parts, one part being formed by a material section bent from the first side wall 4 and the other part being formed by a material section bent from the second side wall 5. Accordingly, the conductor guide base 17 has a longitudinal cutout.

[0076] In this embodiment, the material section 62 is either present only on one side of the conductor guide base 17, ie on the side of the first side wall 4 or the second side wall 5, or as in Figures 7 to 9 As shown in FIG. 1 , the material section is present on two parts of the conductor guide base 17, wherein the material section protrudes from the conductor guide base 17 and is bent over to form a first SMD solder contact 60. Since the two parts are always electrically connected to one another via the busbar piece 2, they also form an SMD solder contact 60 that is at least electrically uniform in this manner.

[0077] exist Figures 7 to 9 It can also be seen in the embodiment of FIG. 1 that the actuation plate 13 can also be realized without the extension region 130 and accordingly protrude laterally in a stump-like manner.

[0078] The two-part embodiment of the inclined conductor guide base 17 can also be combined with the embodiment according to the first embodiment ( Figures 1 to 3 ) and the first SMD solder contact 60 according to the third embodiment ( Figure 6 )'s embodiment combination of the first SMD solder contact 60.

[0079] Can from Fig. 9 Identification Figure 8 1 is a side sectional view of a conductor connection contact element 1. It is obvious here that the inner side of the cover section 6 has a press-in portion. 20, by means of which a clamping projection 21 is formed. It can also be seen that the clamping section 11 has a clamping edge 22 at its freely movable end, which in the illustrated static state without an inserted electrical conductor rests against the inner side of the cover section 6. The clamping edge ends, for example, at such a clamping projection 21. Thus, an electrical conductor inserted and clamped between the clamping edges 22 and at the clamping projection 21 is clamped by the clamping force of the clamping spring 3, with reduced contact resistance at the busbar piece 2 and with an optimal pressure per unit area. In this case, the clamping force of the clamping spring 3 is concentrated on the reduced surface of the clamping projection 21, so that the force acting per unit area (pressure per unit area) is increased.

[0080] It is also clear that on the opposite side the contact section 9 rests on the bottom section 7. The positional fixation is achieved by the following orientation: the embossing in the bottom section 23 sinks into the opening 16 of the abutment section 9. Thus, the clamping spring 3 is prevented from slipping off in the wire insertion direction L. In addition, the abutment section 9 and the clamping section 11 of the clamping spring 3 abut against the second side wall 5, so that the clamping spring 3 is prevented from tilting.

[0081] Furthermore, in the front open end region of the conductor insertion channel 8, an oblique conductor guide base 17 can be seen, which guides the electrical conductor past the subsequent spring bow 10, and an end stop 19 can be seen at the opposite end of the busbar piece 12. It is also clear that the spring bow 10 extends offset outwardly (downward in the figure) relative to the inside of the base part 7 and is therefore arranged in the region between the flat section of the base part 7 and the conductor guide base 17.

[0082] from Fig.10 Visible in Figures 1 to 9 3D view of the clamping spring 3 of the conductor connection contact element 1 of FIG. It is apparent here that the clamping section 11 has a clamping edge 22 over the majority of its width, to which the actuating section is laterally connected by means of a laterally projecting actuating flange 13. Thus, viewed transversely to the longitudinal extension of the clamping section 11, the actuating section is positioned by means of the actuating flange 13 next to the region of the clamping edge 22, i.e., on the side edge of the clamping section 11.

Claims

1. A wire connection contact element (1) for clamping an electrical wire, comprising at least one spring-type terminal, the spring-type terminal having a clamping portion for fixing and clamping the electrical wire, the wire connection contact element having at least one first SMD soldering contact (60), the first SMD soldering contact being arranged on a mounting side (61) of the wire connection contact element (1), wherein the wire connection contact element (1) further comprises a wire introduction region (14) formed by a sheet metal part of the wire connection contact element (1), the wire introduction region having at least one wire guide bottom (17), the wire guide bottom being oriented obliquely to a wire introduction direction (L) in order to form a guide surface for the electrical wire to be introduced, wherein: The material section (62) of the sheet metal part which is present in the wire insertion area (14) and protrudes from the wire guide bottom (17) is bent toward the plane of the mounting side (61) via at least one bending area (63) to form the first SMD soldering contact (60), and at least one sub-area of ​​the wire guide bottom (17) is adjacent to at least one of the bending areas (63), characterized in that: The conductor connection contact element (1) has a second SMD solder contact (65), and the bottom section (7) of the sheet metal part has at least one recess (66), which is arranged between the first SMD solder contact (60) and the second SMD solder contact (65) and extends over the entire width of the conductor connection contact element (1), wherein the recess (66) provides free space for arranging a spring bow (10) of a clamping spring (3), which is designed as a separate component separate from the sheet metal part.

2. A wire connection contact element (1) for clamping an electrical wire, comprising at least one spring-type terminal, the spring-type terminal having a clamping portion for fixing and clamping the electrical wire, the wire connection contact element having at least one first SMD soldering contact (60), the first SMD soldering contact being arranged on a mounting side (61) of the wire connection contact element (1), wherein the wire connection contact element (1) also comprises a wire introduction area (14) formed by a sheet metal part of the wire connection contact element (1), the wire introduction area having at least one wire guide bottom (17), the wire guide bottom being oriented obliquely to a wire introduction direction (L) in order to form a guide surface for the electrical wire to be introduced, wherein: The material section (62) of the sheet metal part which is present in the wire insertion area (14) and protrudes from the wire guide bottom (17) is bent toward the plane of the mounting side (61) via at least one bending area (63) to form the first SMD soldering contact (60), and at least one sub-area of ​​the wire guide bottom (17) is adjacent to at least one of the bending areas (63), characterized in that: An overload stop (15) for a clamping section (11) of a clamping spring (3) is present on the side walls (4, 5) of the sheet metal part, wherein the overload stop (15) is an end edge delimiting a lateral opening (12) on the first side wall (4).

3. A wire connection contact element (1) for clamping an electrical wire, comprising at least one spring-type terminal, the spring-type terminal having a clamping portion for fixing and clamping the electrical wire, the wire connection contact element having at least one first SMD soldering contact (60), the first SMD soldering contact being arranged on a mounting side (61) of the wire connection contact element (1), wherein the wire connection contact element (1) also comprises a wire introduction area (14) formed by a sheet metal part of the wire connection contact element (1), the wire introduction area having at least one wire guide bottom (17), the wire guide bottom being oriented obliquely to a wire introduction direction (L) in order to form a guide surface for the electrical wire to be introduced, wherein: The material section (62) of the sheet metal part which is present in the wire insertion area (14) and protrudes from the wire guide bottom (17) is bent toward the plane of the mounting side (61) via at least one bending area (63) to form the first SMD soldering contact (60), and at least one sub-area of ​​the wire guide bottom (17) is adjacent to at least one of the bending areas (63), characterized in that: An overload stop (15) is provided on the side walls (4, 5) of the sheet metal part, directly adjacent to a contact section (9) of the clamping spring (3), in order to prevent a movement of the clamping spring (3) in the line insertion direction (L).

4. A wire connection contact element (1) for clamping an electrical wire, comprising at least one spring-type terminal, the spring-type terminal having a clamping portion for fixing and clamping the electrical wire, the wire connection contact element having at least one first SMD soldering contact (60), the first SMD soldering contact being arranged on a mounting side (61) of the wire connection contact element (1), wherein the wire connection contact element (1) further comprises a wire introduction area (14) formed by a sheet metal part of the wire connection contact element (1), the wire introduction area having at least one wire guide bottom (17), the wire guide bottom being oriented obliquely to a wire introduction direction (L) in order to form a guide surface for the electrical wire to be introduced, wherein: The material section (62) of the sheet metal part which is present in the wire insertion area (14) and protrudes from the wire guide bottom (17) is bent toward the plane of the mounting side (61) via at least one bending area (63) to form the first SMD soldering contact (60), and at least one sub-area of ​​the wire guide bottom (17) is adjacent to at least one of the bending areas (63), characterized in that: Viewed transversely to the line insertion direction (L), an actuating section accessible by an actuating tool is present next to a clamping edge (22) of a clamping spring (3) in the direction of the side walls (4, 5) of the sheet metal part, wherein the actuating section has an actuating plate (13) which is arranged laterally in an opening (12) of a first side wall (4).

5. The conductor connection contact element according to claim 1, characterized in that The first SMD solder contact (60) has a bearing surface (64) which is designed to bear against a contact surface of a circuit board, wherein the bearing surface (64) is spaced apart from the conductor guide base (17) via at least one of the bending regions (63).

6. The wire connection contact element according to claim 5, characterized in that The support surface (64) is formed by an end face of the material section (62) of the sheet metal part that protrudes from the conductor guide base (17), or by a surface of the material section (62) that adjoins the inner side or the outer side of at least one bending region (63).

7. The wire connection contact element according to any one of claims 1 to 4, characterized in that The material section (62) of the sheet metal part protruding from the conductor guide base (17) is bent via exactly one bending region (63) or via two bending regions (63) with opposite bending directions to form the first SMD solder contact (60).

8. The wire connection contact element according to any one of claims 1 to 4, characterized in that The conductor connection contact element (1) has a conductor insertion channel (8) in the conductor insertion region (14), wherein the conductor insertion channel has the conductor guiding base (17).

9. The conductor connection contact element according to any one of claims 1 to 4, characterized in that The clamping position is arranged behind the wire guide bottom (17) and / or behind the first SMD soldering contact (60) when viewed along the wire insertion direction (L).

10. The conductor connection contact element according to any one of claims 1 to 4, characterized in that The first SMD soldering contact (60) protrudes from the wire guide bottom (17) beyond the wire insertion region (14) opposite to or not opposite to the wire insertion direction (L).

11. The conductor connection contact element according to any one of claims 1 to 4, characterized in that The conductor guide base (17) is formed by at least two mutually separated material sections (62) of the sheet metal part or of different sheet metal parts, and the first SMD solder contact (60) is formed by an extended material section (62) of one or both of the sheet metal parts.

12. The conductor connection contact element according to any one of claims 1 to 4, characterized in that The wire connection contact element (1) has a second SMD soldering contact (65), which is arranged behind the first SMD soldering contact (60) in the wire insertion direction (L).

13. The conductor connection contact element according to any one of claims 1 to 4, characterized in that The conductor connection contact element (1) has a busbar piece (2) as part of a spring-type terminal for clamping an electrical conductor, the busbar piece being formed by the sheet metal part of the conductor connection contact element, the sheet metal part having a first side wall (4) and a second side wall (5) opposite to the first side wall (4), a bottom section (7) extending from the first side wall (4) to the second side wall (5) opposite to the bottom section (7) and extending from the first side wall (4) to the second side wall (5) opposite to the bottom section (7), wherein the side walls (4, 5) are connected to the cover section (6) and the The bottom section (7) or the wire guiding bottom (17) encloses a wire introduction channel (8), and the wire connecting contact element has a clamping spring (3) arranged on the busbar piece (2), the clamping spring having a contact section (9) at a first end region and a clamping section (11) for clamping an electrical wire at a second end region opposite to the first end region, the clamping section having a clamping edge (22), wherein the contact section (9) is arranged on the bottom section (7), and wherein the clamping section (11) extends toward the cover section (6) with its freely movable end.

14. The wire connection contact element according to claim 13, characterized in that Viewed transversely to the line insertion direction (L) of the clamping section (11), an actuating section accessible to an actuating tool is located next to the clamping edge (22) in the direction of the first side wall (4).

15. The conductor connection contact element (1) according to claim 14, characterized in that The actuating section is designed as an actuating plate (13), which is situated laterally on the clamping section (11) of the clamping spring and projects laterally from the first side wall (4).

16. The conductor connection contact element (1) according to claim 15, characterized in that The first side wall (4) has an opening (12) for passing the operating plate (13) therethrough.

17. The conductor connection contact element (1) according to claim 16, characterized in that A wire guide element (34) adjacent to the clamping section (11) is formed on the first side wall (4), wherein the wire guide element (34) has a section of the first side wall (4) which is oriented obliquely in the direction of the opposite second side wall (5).

18. The conductor connection contact element (1) according to claim 17, characterized in that The wire-guiding element (34) is oriented away from an end edge of the first side wall (4) which delimits the opening (12) and is located opposite the wire-guiding element (34).

19. The conductor connection contact element (1) according to claim 17, characterized in that The conductor guide element (34) has a material tongue of the first side wall (4), which is oriented obliquely in the direction of the second side wall (5) and in the direction of the clamping section (11).

20. The conductor connection contact element (1) according to any one of claims 14 to 16, characterized in that The actuation section has an actuation plate which extends in the direction of the plane of the cover section (6).

21. The conductor connection contact element (1) according to claim 17, characterized in that The actuation plate (13) is arranged laterally in an opening of the first side wall (4), which is arranged behind the exposed end of the wire guide element (34) as viewed in the wire insertion direction (L) and is accessible from the outside.

22. The conductor connection contact element (1) according to any one of claims 14 to 16, characterized in that An end stop is formed at the rear end of the busbar piece (2), which is opposite the conductor insertion channel (8), by a material flange (19) bent from the side walls (4, 5), from the bottom section (7) or from the cover section (6).

23. The conductor connection contact element (1) according to claim 22, characterized in that Material flanges (19) are bent towards each other from the side walls (4, 5), which material flanges form the end stops.

24. The conductor connection contact element (1) according to any one of claims 14 to 16, characterized in that The contact section (9) is clamped between the side walls (4, 5) and the bottom section (7).

25. The conductor connection contact element (1) according to any one of claims 14 to 16, characterized in that The abutment section (9) is fixedly secured to the busbar piece (2) by means of a fixing section which projects from the abutment section (9) into an opening (46) of the base section (7) or by means of a fixing section which projects from the base section (7) into an opening (16) of the abutment section (9).

26. The wire connection contact element according to claim 25, characterized in that The fixing section is a strap (45) or an embossed portion (23).

27. The conductor connection contact element (1) according to any one of claims 14 to 16, characterized in that The clamping spring (3) has a spring bow (10) connecting the contact section (9) to the clamping section (11), and, viewed in the wire insertion direction (L), the wire guide bottom (17) is arranged in front of the spring bow (10) from at least one side wall (4, 5) and is bent in the direction of the opposite side wall (4, 5), wherein the wire guide bottom (17) is oriented obliquely in the wire insertion direction (L) toward the cover section (6).

28. The conductor connection contact element (1) according to any one of claims 14 to 16, characterized in that The cover section (6) or the bottom section (7) has a welded connection region (18a, 18b).

29. The conductor connection contact element (1) according to any one of claims 1 to 4, characterized in that A material section (62) of the sheet metal part which is present in the wire insertion area (14) and protrudes from the wire guide bottom (17) is bent toward the plane of the mounting side (61) at an angle greater than 90° via at least one bending area (63) to form the first SMD soldering contact (60), so that a supporting surface (64) of the first SMD soldering contact (60) is formed by the surface side of the wire guide bottom (17) that guides the electrical wire to be introduced.

30. The conductor connection contact element (1) according to claim 2 or 3, characterized in that The overload stop member (15) is an overload stop strap that protrudes from the side wall and extends in the direction of the opposite side wall.

31. The conductor connection contact element (1) according to claim 30, characterized in that In the sections of the side walls (4, 5) forming the lateral openings, the overload stop straps are bent in such a way as to point into the interior of the cage-shaped conductor connection contact element (1).

32. The conductor connection contact element (1) according to claim 2 or 3, characterized in that The overload stop (15) is positioned in the space between the clamping section (11) of the clamping spring (3) and the bottom section (7) of the sheet metal part.

33. The wire connection contact element (1) according to claim 4, characterized in that The clamping section (11) of the clamping spring has a clamping edge (22) over the main part of its width, the actuating section being laterally connected to the clamping section (11) by means of a laterally projecting actuating collar.

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