JP2017514282A - Conductor connection terminal - Google Patents

Abstract

The invention provides a conductor connection terminal (1) comprising at least one conductor clamping element (3) integrally formed from a sheet metal part, wherein the at least one conductor clamping element (3) has a base section (10). A conductor having an arcuate spring portion (11) adjacent to the base section (10) and a pinching protrusion (12) positioned adjacent to the arcuate spring section (11) and on the opposite side of the base section (10) The connection terminal (1) will be described. The free clamping end (13) of the clamping projection (12) forms a clamping edge for terminal connection of the conductor (4). The end section (14) of the base section (10) located on the opposite side of the arcuate spring section (11) extends from the plane widened by the base section (10) in the direction of the clamping protrusion (12). Form an overload stop for the clamping protrusion (12). [Selection] Figure 1

Description

  The present invention relates to a conductor connection terminal having at least one conductor holding element integrally formed from a thin metal plate part, wherein the at least one conductor holding element has an arcuate spring portion adjacent to the base section and the base section. ), and a pinching protrusion adjacent to the arcuate spring portion and located on the opposite side of the base section, and a free pinching end portion of the pinching protrusion forms a pinching edge for terminal connection of the conductor And conductor connection terminals.

  This type of conductor connection terminal serves for terminal connection of conductors and for establishing conductive connections between conductors and devices that are conductively connected directly or indirectly to connection contacts. . The conductor connection terminals can be soldered onto the printed circuit board, for example through its connection contacts.

  EP 1947738 A1 describes a conductor connection terminal and a leaf spring contact for this purpose, said leaf spring contact being installed in an insulating housing. The insulating material housing has an overload protection web, and this overload protection web projects from the rear side into the conductor insertion opening of the insulation material housing and is a part of the insulation material housing.

  EP 0682385B1 discloses an electrical connector comprising an insulating material housing and a conductor clamping element, the conductor clamping element being installed in the insulating material housing and integrally formed from sheet metal parts. A clamping protrusion that extends in a direction that is obliquely away from the base section is bent out on one side of the base section by an arcuate spring. On the side of the base section located on the opposite side of the arcuate spring, opposite to the direction in which the clamping projection extends so that the connecting contact protrudes out of the insulation housing in the installed state Bent down.

  Furthermore, the material tab is released from the base section and bent out in the direction of the clamping protrusion. This material tab forms an overload stop for the pinching protrusion, so that the pinching protrusion contacts the overload stop when a shift in the direction of the base section occurs. In this way, excessive compression of the arcuate spring part taking into account the spring characteristics is avoided. The overload stop further functions as a stop for the assembly tool so that the conductor clamping element can be inserted into and sandwiched within the insulation housing.

  In view of the foregoing, it is an object of the present invention to provide an improved conductor connection terminal that is particularly compact, saves material, and provides overload protection independent of the insulation housing.

This object is achieved by a conductor connection terminal having the features of claim 1. Advantageous embodiments are described in the dependent claims.
In the case of this conductor connection terminal, the end section of the base section located on the opposite side of the arcuate spring section extends from the plane widened by the base section in the direction of the sandwich projection, and is an excess for the sandwich projection. Form a load stop. Thus, the overload stop is formed from a material tab that extends the length of the base section opposite the arcuate spring and is bent out of the plane of the base section. This free end section made of sheet metal parts, bent out of the plane of the base section, is thus bent in the direction of the clamping projection and is also a clamping projection in the direction of the base section Have a length adapted to prevent excessive displacement. For this purpose, this end section forms a stop for the clamping protrusion. It is important that the conductor clamping element is integrally formed from a sheet metal part. “Integrally” means that the overload stop formed by the base section, the arcuate spring part, the clamping protrusion part, and the end part located on the opposite side of the arcuate spring part without a seam (joint point) It is intended to be understood to mean that it is formed from one piece (without).

  It is advantageous if there is at least one connecting contact which is released from the base section (eg cut or punched out) and bent downwards. In this way, the conductor clamping element can be formed in a particularly compact and material-saving manner. In this process, the overload stop can be realized with sufficient length and oriented towards the free clamping end.

  With this arrangement, the free end section located on the opposite side of the arcuate spring section and adjacent to the base section is now used for overloading and not for connecting contacts, It is further optimized and kept as short as possible.

  It is particularly advantageous if the connecting contact is released from the base section and bent out of the plane of the base section in a direction facing away from the clamping projection. In this case, a slot remains in the base section. In this case, the side webs that bound the slots are no longer needed for energization purposes, so that the energization cross-section, and thus the current transfer resistance, is such that the material tab is bent out of the base section. Will not be adversely affected.

  It is particularly advantageous if the connecting contact is bent out of the base section in the region adjacent to the transition between the base section and the arcuate spring section. In this case, the current path from the free clamping end to the connecting contact is kept as short as possible.

  Furthermore, it is advantageous if the free end of the end section forming the overload stop is bent in the direction of the free end of the clamping projection. This further bending directed in the direction of the arcuate spring and the pinching protrusion adjacent to the arcuate spring does not cause the overload stop to act firmly on the pinching protrusion, but rather slightly elastically. It has the effect of having flexibility. This reduces the stress on the clamping protrusion.

  It is particularly advantageous if the free end of the end section that forms the overload stop is tapered. This has the effect that the free end region forming the overload stop is sufficiently stabilized by its relatively wide width. Due to the tapered part, the stop surface for the clamping protrusion is adapted to the width of the free clamping end and possibly further reduced. In addition, the tapered portion simplifies the mounting of the conductor clamping element within the insulation housing.

  In a preferred embodiment, the free clamping end of the clamping projection is bent away from the plane that is widened by the clamping projection in a direction away from the base section. Therefore, the free clamping end is compared to the region of the clamping protrusion adjacent to the above-described free clamping end, and is positioned on the conductor axis of the conductor inserted into the conductor insertion opening and positioned on the conductor clamping element. It is oriented to be steeper. This means that the free clamping end is in contact with the conductor via the edge as sharp as possible in order to increase the surface pressure by reducing the surface area between the clamping protrusion and the conductor in this way. Make sure. In this way, the spring contact force of the conductor clamping element is concentrated in the narrowest possible contact area, thus increasing the surface pressure. This improves the current transfer value and in particular reduces the current transfer resistance during the process.

  It is particularly advantageous if the end face of the free clamping end of the clamping projection extends at an angle in the range of 65 ° to 85 ° with respect to the plane of the clamping projection in the region of the free clamping end. In this case, the end face does not protrude perpendicularly from the plane of the sandwiching protrusion, but rather is formed obliquely with respect to the aforementioned plane. This provides a sharper contact edge than the end face provided at the free clamping end in the case of a simple rectangular sheet metal part. The standard conductor holding force is increased when this type of diagonal section relative to the end face is in the range of 65 ° to 85 °, preferably about 70 °, so that the conductor is more effective from being pulled out. Protected.

  At least one conductor clamping element is preferably installed in the insulating housing in order to form a conductor connection terminal. In this case, the insulation housing has at least one conductor insertion opening leading to the associated free clamping end of the clamping projection.

  In this case, a variant is possible in which a plurality of independent conductor clamping elements are installed adjacent to each other in the insulation housing in order to form a multipole conductor connection terminal. However, it is also feasible that a single conductor clamping element is provided, in which case the conductor clamping element clamping projections, each of which is arranged adjacent to each other, and the associated overload stop are common in the free end section Protrudes from the base section. This therefore corresponds to a variant with a plurality of conductor clamping elements which share a common base section or whose base sections are connected to one another. In this case, in either case, one conductor insertion opening is oriented towards the associated clamping projection. In this embodiment, a plurality of electrical conductors can be inserted into the insulating housing adjacent to each other and can be conductively connected to each other by a conductor clamping element. In this embodiment, it is particularly advantageous if the insulating housing is provided with at least one test opening oriented towards the associated clamping protrusion. In this case, the test opening is assimilated in the interior of the insulation housing with a region inclined with respect to the plane of the insulation housing in a region on the outer surface adjacent to the test opening.

  This slanted area on the inner surface of the insulation housing adjacent to the test opening is such that the conductor end of the bent or multi-wire conductor strikes or exits the aforementioned insulation housing. In addition, the conductor inserted inadvertently is prevented from striking the insulating material housing and coming out from the insulating material housing.

  The test opening may not only be used to verify the potential across the conductor clamping element, but also as an alternative embodiment or in addition to the clamping projection utilizing an operating tool inserted into the test opening. It can also be used to open a clamping point for a conductor formed by a conductor clamping element by displacing in the direction of the base section. Thus, within the spirit of the present invention, the test opening is an opening that leads to the clamping protrusion regardless of its purpose, and in any case includes a release opening.

  The test opening is preferably arranged laterally offset with respect to the conductor insertion axis, the conductor insertion axis being pre-defined by the conductor insertion opening, and on the conductor insertion axis, an insulation housing The conductor which is inserted into and forms the terminal connection with the sandwiching protrusion is positioned. This lateral offset makes it possible in particular to use the test opening as a release opening for the operating tool in order to open the clamping point formed by the conductor clamping element.

  Adjacent to the free clamping end of the clamping projection, a material tab extends beyond the length of the free clamping end. In this embodiment, the material tab is positioned directly below the test opening. The test opening may be further displaced into the rear region of the insulation housing by using an extended material tab of this kind. In this case, the conductor clamping element is operated by an operating tool that is inserted into the test opening and acts on the material tab. In this way, the size of the lever arm is increased and the operation of the conductor clamping element is improved.

  The sheet metal part of the at least one conductor clamping element can be formed from a spring sheet metal material, which can be, for example, copper plated. In particular, spring steel provides a spring metal sheet having spring elastic properties. In this case, a chromium-containing alloy is particularly suitable.

  However, it is particularly advantageous if the sheet metal part is formed from a copper alloy. Copper has the disadvantages that it is inferior in elasticity to spring steel and difficult to plastically deform, but it has better conductivity than spring steel and provides a low current transfer resistance. However, the overload stop bent from the free end region of the thin metal plate part can effectively suppress the plastic deformation of the conductor holding element formed from the copper alloy. It is particularly suitable for sheet metal parts made of copper alloy.

  Hereinafter, the present invention will be described in more detail with reference to the exemplary embodiments using the accompanying drawings.

It is a perspective view of the conductor connection terminal in which the conductor was inserted. It is a top view of the conductor connection terminal of FIG. FIG. 3 is a side sectional view of the conductor connection terminal of FIGS. 1 and 2 along section BB. FIG. 3 is a side sectional view of the conductor connection terminal of FIGS. 1 and 2 along section CC. It is a perspective view of the conductor clamping element of the conductor connection terminal of FIGS. It is a side view of the conductor clamping element of FIG. FIG. 5 is a side cross-sectional view of the conductor connection terminal of FIGS. 1 to 4 along section BB with no conductor inserted. FIG. 8 is a side sectional view of the conductor connection terminal of FIG. 7 taken along section CC. It is a perspective view of a conductor connection terminal in which no conductor is inserted and a test tool or an operation tool is inserted into a test opening. FIG. 10 is a side cross-sectional view of the conductor connection terminal of FIG. 9 in which a test tool or an operation tool is inserted into the test opening and the conductor clamping element is open. FIG. 6 is a perspective view of a further embodiment of a conductor clamping element including an operating protrusion.

  FIG. 1 shows a perspective view of a conductor connecting terminal 1 having an insulating material housing 2 and a conductor holding element 3 installed in the insulating material housing. The figure shows only one conductor clamping element 3 for terminal connection of the conductor 4 shown on the left hand side, which conductor 4 enters into the associated conductor insertion opening 5 on the front side of the insulation housing 2. Guided, guided into the insulation housing 2 and guided to the associated conductor clamping element 3. The previous figure shows only one connection contact 6, which protrudes out of the insulation housing 2 from the bottom side of the conductor clamping element 3 arranged inside the insulation housing 2. In the exemplary embodiment shown, this connection contact 6 is designed in the form of a solder pin and is inserted into a hole in the printed circuit board where it is soldered to a conductor track on the printed circuit board. Is intended to be. However, other embodiments of the connecting contact 6, such as surface mount solder contacts (SMD) can also be utilized.

  However, the conductor connection terminal 1 that does not include the connection contact 6 protruding outside the insulating material housing 2 can also be used in the same manner. Instead, in this type of embodiment, a plurality of conductor clamping elements 3 located adjacent to one another are inserted into the insulating material housing 2 so that the respective conductors 4 forming terminal connections with the associated conductor clamping elements 3 are connected to one another. To be conductively connected, they can be conductively connected to each other. Therefore, this type of conductor connection terminal 1 would be a so-called outlet box terminal or connection terminal.

  The previous figure further shows that the insulation housing 2 is closed by a cover 7 at the rear. In the embodiment shown, the cover 7 is integrally connected to the body of the insulation housing 2 by means of a thin film hinge 8. At least one conductor clamping element 3 can be inserted into the body of the insulation housing 2 and attached thereto using the cover 7.

  The aforementioned figure further shows that a test opening 9 is made on the upper side of the insulation housing 2, ie on the upper side of the body. The test opening 9 is on the side with respect to the associated conductor insertion opening 5 and to the conductor insertion axis in which the conductor 4 inserted in the insulation housing 2 and forms the terminal connection with the associated conductor clamping element 3 is positioned. It is clear that they are arranged in an offset direction. Therefore, the test opening 9 is free from the area of the conductor clamping element 3 located adjacent to the free end from which the insulating material of the conductor 4 to be inserted is stripped and the clamping protrusion of the conductor clamping element 3. It leads to the area of the clamping end. The potential across the associated conductor clamping element 3 can be measured using this test opening 9. In addition to this or as an alternative to this, the test opening 9 is used to open a clamping point for the conductor 4 formed by the conductor clamping element 3 and also to form a terminal connection. Can be used as a manipulation opening.

  FIG. 2 shows a plan view of the conductor connection terminal 1 of FIG. Again, it is clear that the test opening 9 leads to the associated conductor clamping element 3 inside the body of the insulation housing 2.

  FIG. 2 also shows a section line BB along the conductor insertion axis on which the conductor is inserted into the insulation housing 2 to form a terminal connection with the associated conductor clamping element 3 4 is positioned. Parallel to the aforementioned conductor insertion axis, a section CC is also shown, which section passes through the test opening 9.

  FIG. 3 shows a side sectional view of the conductor connection terminal 1 of FIGS. 1 and 2 along section B-B, ie along the conductor insertion axis. In the illustrated embodiment of the conductor connection terminal 1, the conductor 4 is inserted into the associated conductor insertion opening 5 in the insulation housing 2.

  The previous figures show that a conductor clamping element 3 is provided inside the insulating housing 2 for each conductor 4 to be connected, ie for each conductor insertion opening 5. The conductor clamping element 3 has a base section 10 which is integrally formed from sheet metal parts and which is located on the floor of the insulation housing 2. An arcuate spring portion 11 is adjacent to the base section 10, and the arcuate spring section is assimilated with a sandwiching protrusion 12 that extends obliquely in a direction away from the base section 10. The free clamping end 13 of the clamping projection is a base section in the direction of the conductor insertion shaft and conductor in the terminal connection state, that is, in the direction of the upper side of the insulating material housing 2 opposite to the floor of the insulating material housing 2. Bent further away from 10 to form a clamping point for the conductor 4, thereby forming a terminal connection. It is clear that the sharp edge at the free clamping end 13 is inserted into the end of the conductor 4 from which the insulating material has been stripped, thereby preventing the conductor 4 from being pulled out.

  In the preceding figure, the insulating housing 2 is shown in a direction in which the connecting contact 6 is released from the base section 10 and is directed opposite to the direction of the area of the arcuate spring part 11 and the clamping protrusion 12. It is bent downward from the floor.

  Therefore, a current flows directly to the connecting contact 6 through the conductor 4 and the free clamping end 13 and via the clamping projection 12 and the arcuate spring 11. In this way, a relatively short current path is realized.

  On the side of the base section 10 located on the opposite side of the arcuate spring section 11, the free end of the base section 10 is in the direction of the clamping projection 12 and the conductor 4 in the terminal connection state, that is, the insulating housing 2 It is bent upward in the upper direction. This end section 14 located on the opposite side of the arcuate spring part 11 forms an overload stop for the clamping projection 12 and is directed towards the clamping projection 12 for this purpose, As a result, when the sandwiching protrusion 12 is displaced in the direction of the base section 10, the above-described sandwiching protrusion comes into contact with the free end of the end section 14 and stops, and in the process, the sandwiching protrusion for the conductor 4 is stopped. The point opens enough.

  In the exemplary embodiment shown, the overload stop is a clamping projection in which the free clamping end 13 of the clamping projection 12 is located approximately at the lowest conductor plane (dashed line in FIG. 3) in the direction of the base section 10. Already acting at 12 positions, this conductor plane is defined by the radius or position of the cross section of the conductor insertion opening 5 at the transition to the interior of the insulation housing 2. This radius defines the extent to which the conductor 4 can be displaced in the direction of the base section 10 and defines the maximum cross-sectional area at the end of the connected conductor 4 where the insulation is stripped.

  It is clear that the end section 14 forming the overload stop is bent in the direction of the free clamping end 13 of the clamping projection 12 at its free end. Therefore, the free end of the end section 14 is in the direction of the clamping protrusion, in the direction of the conductor insertion opening 5 of the insulating housing 2 in the state in which the conductor clamping element 3 is installed, or in the arcuate spring part 11. Is bent in the direction. This means that the conductor clamping element 3 has as long a length as possible and therefore has a good fixing surface on its base section 10 and a sufficient length for the connecting contact 6 but also a clamping protrusion. 12 has the effect of forming an overload stop.

  FIG. 4 shows the conductor connection terminal 1 of FIGS. 1 to 3 along section CC, guided through the test opening 9 parallel to the conductor insertion axis. Even in this case, the conductor 4 is inserted into the associated conductor insertion opening 5 to form a terminal connection with the associated conductor clamping element 3. The width of the sandwiching protrusion 12 may be larger than the cross section of the conductor 4 that forms the terminal connection together. Preferably, the free sandwiching end 13 is adjacent to the free end where the insulating material of the conductor 4 is stripped. Then, it may be larger than the minimum diameter of the conductor insertion opening 5 so as to protrude sideways. Furthermore, the center of the conductor clamping element 3 may also be offset laterally with respect to the conductor insertion opening 5 or the conductor insertion direction. The test opening 9 is oriented towards and aligned with this laterally projecting region of the free clamping end 13. Therefore, firstly, in order to measure the potential that can be applied across the clamping element 3, and secondly to open the clamping point formed by the conductor clamping element 3 and to remove the conductor 4, the test tool has a terminal It can be guided laterally past the conductor 4 forming the connection and onto the clamping projection 12 or onto the free clamping end 13 of the clamping projection described above. For this purpose, the clamping protrusion 12 can be displaced in the direction of the base section 10 via an operating tool such as a rod, screwdriver or the like. In order to avoid excessive displacement of the clamping protrusion 12 in the direction of the base section 10 and thus avoid plastic deformation which adversely affects the spring characteristics of the conductor clamping element 3, an overload stop is provided. This overload stop is formed from a free end section 14 of the base section 10 on the opposite side of the arcuate spring section 11, and the free end section 14 extends in the direction of the clamping projection 12, specifically a connecting contact. 6 is bent in the direction of the free clamping end 13 of the clamping projection 12 opposite to the direction of the range 6.

  It is also clear from the sectional view that the cover 7 of the insulating material housing 2 is locked to the latch opening 16 on the floor of the insulating material housing 2 via the latch protrusion 15. For this purpose, the latch projection 15 is protected from entering the latch opening 16 and being unintentionally opened in the transverse web 17 of the insulation housing that bounds the latch opening 16.

  It is further clear that in the conductor clamping element 3 that can be seen, only one connecting contact 6 does not protrude from the bottom side of the insulation housing 2 under the conductor insertion opening 5. Rather, a further connection contact 6 is provided offset with respect to the first connection contact 6, which is likewise in the region adjacent to the cover 7 on the bottom side of the insulation housing 2. It is guided outside. This connecting contact is part of a further conductor clamping element 3 provided adjacent to the conductor clamping element 3 seen in the figure, which further conductor clamping element 3 is adjacent to the first conductor insertion opening 5 This is for the terminal connection of a further conductor 4 that can be inserted into the associated further conductor insertion opening 5. In this way, the multipole conductor connection terminal 1 in which the plurality of connection contacts 6 are alternately offset can be realized. Therefore, handling is improved and a sufficient space between the individual connection contacts 6 is ensured. Furthermore, in this way, the conductor connection terminal 1 can be mechanically fixed to the printed circuit board in a very stable manner by soldering.

  FIG. 5 is a schematic diagram of a perspective view of the conductor clamping element 3. It is clear that the conductor clamping element 3 is integrally formed from a single sheet metal part. Copper alloys are particularly suitable for sheet metal parts. Copper alloys provide superior conductive properties than spring steel and have a lower current transfer resistance. However, the spring properties of copper alloys are not as good as those of spring steels, especially spring steels formed from chromium alloys. Therefore, in the case of a thin metal plate component made of a copper alloy, it can be ensured that the sandwiching protrusion 12 and particularly the arcuate spring portion are deflected only within a limited range and are not plastically deformed. In this way, it can be ensured that the spring elastic properties of the conductor clamping element 1 are maintained.

  This is accomplished by an upwardly bent end section 14 that forms an overload stop. It is clear that the free end of this end section 14 is tapered. Therefore, the above-mentioned free end is adapted to the width of the free clamping end 13 similarly tapered and has a width corresponding to the width of the free clamping end 13 or a narrower width.

  Furthermore, it is clear that the connecting contact 6 is released from the base section 10. This can be achieved by cutting out or stamping out the connecting contact 6 from the sheet metal part in an unbent state. A slot 18 bounded by the two side webs then remains in the base section 10. Accordingly, a part of the material of the base section 10 is used to form the connecting contact 6. The connection contact 6 also has at least one bend 19 for the purpose of better handling in order to fix the conductor connection terminal 1 and the conductor clamping element 3 in the hole of the printed circuit board without soldering. Can do.

  The aforementioned figure further shows that the free clamping end 13 faces upwards with respect to the plane widened by the clamping projection 12 in the region of the transition between the arcuate spring part 11 and the free clamping end 13, ie the base section. It is shown in more detail that it is bent away from 10. Therefore, the free clamping end 13 is introduced in the direction of the conductor insertion shaft or the conductor 4, and the angle between the upper side of the free clamping end 13 and the conductor 4 forming the terminal connection is determined by the clamping protrusion 12. Compared to the angle of. This bent free clamping end 13 improves (increases) the standard conductor holding force compared to a solution without this kind of bend.

  Furthermore, it is clear that a latching element 20 in the form of a protruding latching protrusion or in the form of a latching recess is provided on the side edge of the base section 10. In this way, the conductor-clamping element can be packed into the insulation housing 2 or can be firmly fixed in place in an intermeshing manner. The protruding connecting contact 6 provides positional stability in the region of the arcuate spring portion 11.

For adjacent conductor clamping elements 3 that include alternately offset connecting contacts 6, these latching elements 20 can be provided in the region of the arcuate spring part 11 on the base section 10.
FIG. 6 shows a side view of the conductor clamping element 3 of FIG. From this figure, the end portion protruding from the base section 10 so that the free holding end portion 13 abuts the end side of the protruding end section 14 when the holding protrusion 12 is displaced in the direction of the base section 10. It is clear that the section 14 is oriented towards the free clamping end 13 to form an overload stop.

  The previous figures further show that the free clamping end 13 is in the range of about 140 ° to 170 °, preferably with a customary tolerance (+ −5 °), relative to the plane where the other part is widened by the clamping projection 12. ) And the inner angle β of about 160 ° is shown to be bent further away from the base section 10.

  It is further clear that the free clamping end ends in an end face S that is not oriented at an angle of 90 ° with respect to the plane of the free clamping end 13 as is conventional. Rather, this end face S is inclined to form an angle with respect to the clamping plane K, which is parallel to the plane of the base section 10 and in the extended state of the clamping projection 12 shown. The sharp edge of the free clamping end 13 is located on the clamping plane K. The angle α between this clamping plane K and the plane spread by the end face S is increased by at least 10 ° relative to this rather than about 40 ° with respect to the vertical end face. The angle α is preferably about 50 ° to 70 °, particularly preferably about 68 ° + −5 °.

  However, the angle γ of this end face with respect to the plane of the clamping protrusion 12 in the region of the free clamping end 13 is in the range of approximately 65 ° to 85 °, preferably about 70 ° ± conventional tolerances. .

In this way it can be ensured that a standard conductor holding force is achieved.
FIG. 7 shows a cross-sectional side view along section BB of the conductor connection terminal 1 of FIGS. 1 to 4 without a conductor inserted. The bent end section 14, which is located on the opposite side of the arcuate spring part 11 and forms an overload stop, is the lowest inner surface, ie the inner surface located closest to the base section 10 and parallel to the plane of the base section 10. It is clear that it is located with its free end slightly below the plane E which is widened by the conductor insertion opening 5 having the smallest diameter. In this case, the free end of the end section 14 is separated from the plane E by the thickness of the free clamping end 13. Here, when the clamping protrusion 12 is displaced in the direction of the base section 10, the free clamping end 13 is positioned at the position where the sharp clamping edge of the free clamping end 13 is located approximately in the plane E. I hit it. In order to open the clamping point, it is not necessary for the clamping projection 12 to be displaced further downward in the direction of the base section 10. Therefore, it is ensured that the pinching protrusion 12 and the arcuate spring portion 11 adjacent to the pinching protrusion are only displaced to the extent necessary. In this way, inconvenient plastic deformation of the conductor clamping element 3 and excessive stress on the conductor clamping element 3 are prevented.

  FIG. 8 shows the conductor connection terminal 1 of FIG. 7 along section CC through the test opening 9. In this figure, it is clear that the test opening 9 leads to an oblique area 21 inside the insulation housing 2. Therefore, compared with the plane on the upper side of the insulating material housing 2 in which the test opening 9 is made, the test opening 9 has a region 21 which is inclined with respect to the above inside in the insulating material housing 2. end with. Accordingly, the conductor insertion opening 5 defines a conductor insertion axis that extends parallel to the region widened by the base section 10. The oblique region 21 is also inclined with respect to this conductor insertion axis. This diagonal area 21 in the insulation housing 2 in the mouth area of the test / release opening 9 is a bent conductor 4, or an individual wire of the multi-wire conductor 4, or an incorrectly inserted conductor 4. Prevents against bumping or exiting the aforementioned insulation housing.

It is also clear that the test opening 9 is aligned with the free clamping end 13 of the clamping projection 12 and leads to this free clamping end 13.
FIG. 9 shows a perspective view of the conductor connection terminal 1 with the test tool or release tool 22 inserted therein. This test tool or release tool is inserted into the associated test opening 9 from the upper side of the insulation housing 2. The aforementioned tool can be used to measure whether a potential is present across the conductor clamping element 3. However, the pinching point for connecting the conductors 4 formed by the pinching protrusions 12 can also be opened simply by displacing the pinching protrusions 12 in the direction of the base section 10.

  FIG. 10 shows a side sectional view of the conductor connection terminal 1 of FIG. 9 with the test tool or release tool 22 inserted. From this figure it is clear that the rod-like end 23 of the test or release tool 22 strikes the free clamping end 13 and displaces the aforementioned free clamping end in the direction of the base section 10 by the action of force. is there. In this process, the free clamping end 13 strikes the bent end section 14 of the base section 10. In this way, an overload stop is provided which prevents further downward displacement of the clamping protrusion 12 in the direction of the base section 10.

  FIG. 11 shows a further embodiment of the conductor clamping element 3, in which the connecting contact 6 is released from the base section 10 leaving two parallel webs and bent out of the plane of the base section 10. It is. An operation projection 25 bent obliquely from the plane of the adjacent free clamping end 13 protrudes in the width direction from the clamping projection 12 adjacent to the free clamping end 13. The operating projection 25 protrudes beyond the free clamping end 13 to provide an operating area, which can be acted on by operating tools or by operating push buttons movably attached to the surrounding insulation housing. .

  The free end of the end section 14 is bent once again in the direction of the free clamping end 13 and forms a stop tab 26 adjacent to the free clamping end 13 to form an overload stop for the clamping projection 12. Have Therefore, the deflection of the clamping protrusion 12 is limited by the free clamping end 13 abutting against the end side of the stop tab 26. The end of the clamping section 14 is shortened in the direction of the width of the end section 14 apart from the stop tab 25 to form a pocket 27 into which the operating projection 25 can enter. The end side of the clamping end 13 can similarly form an overload stop for the operating projection 25 in the region of the pocket 27.

Claims (12)

  It comprises at least one conductor clamping element (3) formed integrally from a metal plate part, said at least one conductor clamping element (3) being a base section (10), an arcuate shape adjacent to said base section (10) A spring part (11), and a pinching protrusion part (12) located adjacent to the arcuate spring part (11) and on the opposite side of the base section (10), and free of the pinching protrusion part (12) The pinch end (13) is a conductor connection terminal (1) forming a pinch edge for terminal connection of the conductor (4), and is located on the opposite side of the bow spring (11). An end section (14) of the base section (10) extends from a plane widened by the base section (10) in the direction of the sandwiching protrusion (12), and is excessive for the sandwiching protrusion (12). Conductor connection terminal (1), characterized in that it forms a load stop.   The connecting contact (6) is released from the base section (10) and bent out of the plane of the base section (10) in a direction facing away from the clamping projection (12). The conductor connection terminal (1) according to claim 1, characterized in that:   The connecting contact (6) is bent in a region adjacent to the transition between the base section (10) and the arcuate spring portion (11) or in the region of the base of the spring; Conductor connection terminal (1) according to claim 2, characterized in that it is bent out from the base section (10).   4. The free end of the end section (14) forming the overload stop is bent in the direction of the free end of the clamping projection (12). The conductor connection terminal (1) according to one item.   5. A conductor connection terminal (1) according to any one of claims 1 to 4, characterized in that the free end of the end section (14) forming the overload stop is tapered.   The free clamping end (13) of the clamping protrusion (12) is bent out from a plane widened by the clamping protrusion (12) in a direction away from the base section (10). The conductor connection terminal (1) according to any one of claims 1 to 5.   The end surface of the free clamping end portion (13) of the clamping projection (12) is in the range of 65 ° to 85 ° with respect to the plane of the clamping projection (12) in the region of the free clamping end (13). The conductor connection terminal (1) according to any one of claims 1 to 6, characterized in that it extends at an angle (γ) of.   Said at least one conductor clamping element (3) is installed in an insulation housing (2), said insulation housing (2) leading to the associated free clamping end (13) of the clamping projection (12). Conductor connection terminal (1) according to any one of the preceding claims, characterized in that it has at least one conductor insertion opening (5).   At least one test opening (9) oriented towards the associated clamping protrusion (12) is provided in the insulation housing (2), and the test opening (9) comprises the insulation Inside the housing (2) leading to a region (21) inclined with respect to the wall / surface plane of the insulation housing (2) in a region on the outer surface adjacent to the test opening (9); 9. Conductor connection terminal (1) according to claim 8, characterized in.   The test opening (9) is arranged laterally offset with respect to the conductor insertion axis, the conductor insertion axis is predefined in the conductor insertion opening (5), and on the conductor insertion axis, 10. Conductor connection terminal (1) according to claim 9, characterized in that a conductor (4) inserted into the insulating housing (2) and forming a terminal connection with the clamping protrusion (12) is positioned. ).   Adjacent to the free clamping end (13) of the clamping projection (12), a material tab extends beyond the length of the free clamping end (13), and the material tab is the test opening. Conductor connection terminal (1) according to any one of claims 8 to 10, characterized in that it is positioned below the part (9).   12. The conductor connection terminal (1) according to any one of claims 1 to 11, characterized in that the metal plate part of the at least one conductor clamping element (3) is formed from a copper alloy.

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