Spring clip electrically connecting a wire and electronic component

Abstract

A holding and contacting device is disclosed. In an embodiment a holding and contacting device includes a cage defining a cable path through the cage and a spring element protruding into the cable path and configured to apply a clamping force onto a cable placed along the cable path, wherein the spring element and the cage comprise a metal.

Claims

1. A holding and contacting device comprising: a cage defining a cable path through the cage, the cable path extending through the cage from a first cage edge to a second cage edge opposite first cage edge face, the cable path defined by at least an upper cage wall; an insulation block surrounding the cage with the upper cage wall disposed between an upper insulation block wall and the cable path, the insulation block having a cavity extending from the upper insulation block wall into the insulation block, and wherein the insulation block has an insulation block opening extending from the first face to the cavity, and wherein the insulation block opening is separated from the upper wall of the cage and the cable path by a first portion of the insulation block comprising the upper insulation block wall; and a spring element protruding into the cable path and configured to apply a clamping force onto a cable placed along the cable path, the spring element having a first end disposed at the upper wall of the cage, the spring element further having a second end that is opposite the first end of the spring element and that extends from the cable path past the upper insulation block wall into the cavity; wherein the spring element and the cage comprise a metal, wherein the spring element further comprises a release pry at the second end of the spring element, wherein the spring element is configured to be deformed such that no clamping force is applied to the cable placed along the cable path when the release pry is pulled, and wherein the spring element is configured to extend from the upper wall across the cable path when the release pry is in a released state and is configured to retract from a portion of the cable path when the release pry is in a pulled state such that the cable is insertable into the cable path when the release pry is pulled.

2. The holding and contacting device according to claim 1, wherein the spring element and the cage comprise the same metal.

3. The holding and contacting device according to claim 1, wherein the spring element and the cage are integrally made out of a single piece of sheet metal.

4. The holding and contacting device according to claim 1, wherein the spring element and the cage are positively locked to each other.

5. The holding and contacting device according to claim 1, wherein the spring element is configured to apply a magnitude of the clamping force a to the cable placed along the cable path depending on a diameter of the cable, and wherein the spring element is configured to apply a stronger clamping force on the cable having a first diameter than on a cable having a second diameter which is smaller than the first diameter.

6. The holding and contacting device according to claim 1, wherein the spring element is configured to apply the clamping force in a direction that is perpendicular to the cable path.

7. The holding and contacting device according to claim 1, wherein the spring element and the cage consist essentially of stainless steel.

8. The holding and contacting device according to claim 1, wherein the spring element comprises an abutment section configured to abut the cable placed along the cable path and configured to apply the clamping force onto the cable.

9. The holding and contacting device according to claim 1, wherein the holding and contacting device is configured to establish an electrical and mechanical contact of the cable and a component.

10. The holding and contacting device according to claim 1, wherein a material of the cage and the spring element is configured such that an established electrical contact is able to sustain a high levels of current above 50 A.

11. The holding and contacting device according to claim 1, wherein the first end of the spring element is fixed to the upper wall of the cage.

12. The holding and contacting device according to claim 1, wherein the spring element comprises a sharp edge which faces towards the cable path.

13. The holding and contacting device according to claim 12, wherein the spring element comprises an abutment section configured to abut the cable placed along the cable path and configured to apply the clamping force onto the cable, wherein the sharp edge is arranged in the abutment section.

14. The holding and contacting device according to claim 1, wherein the release pry comprises at least one opening which is configured to be engaged with a tool for releasing the clamping force applied by the spring element.

15. The holding and contacting device according to claim 14, and wherein, when the cable path is free of any cable, the at least one opening of the release pry aligns with the insulation block opening to permit engaging the at least one opening of the release pry with a tool through the insulation block opening.

16. An assembly comprising: the holding and contacting device according to claim 1; and a power electronic component, wherein the holding and contacting device establishes a mechanical contact of the holding and contacting device and the power electronic component.

17. The assembly according to claim 16, wherein the spring element is dimensioned such that, when only the power electronic component and no cable is present in the cable path, the spring element abuts the power electronic component and the spring element applies a clamping force onto the power electronic component.

18. The assembly according to claim 16, further comprising the cable wherein the holding and contacting device establishes an electrical and mechanical contact of the cable and the power electronic component.

19. The holding and contacting device according to claim 1, wherein the release pry comprises a first opening and a second opening, wherein, depending on a position of the release pry, a tool can engage, through the insulation block opening, either the first opening or the second opening.

20. The holding and contacting device according to claim 19, wherein the first opening is configured to allow manual deformation of the spring element when no cable is arranged in the cable path.

21. The holding and contacting device according to claim 19, wherein the second opening is configured to allow manual deformation of the spring element when a cable is arranged in the cable path.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further features and refinements become apparent from the following description of the exemplary embodiments in connection with the accompanying figures.

(2) FIG. 1 shows a perspective view of a holding and contacting device.

(3) FIG. 2 shows another perspective view of the holding and contacting device from a different perspective.

(4) FIG. 3 shows a cross-sectional view of an assembly comprising a holding and contacting device, a cable and a component.

(5) FIG. 4 shows a cross-sectional view of the assembly without the cable.

(6) FIGS. 1 and 2 show perspective views of a holding and contacting device 1.

DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS

(7) The holding and contacting device 1 comprises a cage 2 and a spring element 3. The device 1 is configured for providing an electrical and mechanical contact of a cable and a component which can be arranged inside the cage 2. The component can be a power electronic component, e.g., a power electronic capacitor.

(8) The cage 2 comprises four walls 4, 5, 6, 7. In particular, the cage 2 comprises an upper wall 4 and a lower wall 5 which is arranged opposite to the upper wall 4. Further, the cage 2 comprises two sidewalls 6, 7 which connect the upper wall 4 and the lower wall 5. Thus, the cage 2 has the shape of a cuboid wherein two opposing walls are missing. Thereby, a cable path 8 is defined which runs through the cage 2. A cable may be arranged along the cable path 8.

(9) The spring element 3 protrudes into the cable path 8. The spring element 3 is fixed to the upper wall 4 of the cage 2. The spring element 3 comprises a metal band. A first end 9 of the spring element 3 is fixed to the cage 2. In particular, the first end 9 is fixed to the upper wall 4. The spring element 3 has a curved shape such that a part of the spring element 3 protrudes into the cable path 8. A second end 10 of the spring element 3 which is arranged opposite to the first end 9 is arranged outside of the cable path 8.

(10) The spring element 3 comprises an abutment section 11. The abutment section 11 is the section of the spring element 3 which is arranged closest to the lower wall 5 of the cage 2. When a cable is arranged inside the cable path 8, the abutment section 11 is configured to be pressed onto the cable, thereby exerting a clamping force onto the cable. The clamping force is exerted in a direction perpendicular to the cable path 8.

(11) The holding and contacting device 1 is formed from a single sheet of metal. In particular, the single sheet of metal is cut and bended several times to form it into the holding and contacting device 1. Accordingly, the spring element 3 is formed integrally with the cage 2 from the same sheet of metal.

(12) Alternatively, the spring element 3 and the cage 2 may be formed from two separate sheets of metal which are afterwards attached to each other, e.g., in a positively locked manner.

(13) The cage 2 and the spring element 3 are made out of a metal. In particular, the cage 2 and the spring element 3 are made out of the same metal, preferably stainless steel. This material is non-magnetic and non-corrosive, thereby ensuring along-life-service.

(14) Further, the spring element 3 comprises a sharp edge 12. The sharp edge 12 is formed by an edge in an opening which is arranged in the material of the spring element 3. The sharp edge 12 extends in a direction which is perpendicular to the cable path 8. The sharp edge 12 is arranged in the abutment section 11 of the spring element 3. In particular, the sharp edge 12 is formed at the point of the spring element 3 which is closest to the lower wall 5 of the cage 2.

(15) The spring element 3 is configured such that the abutment section 11 is pressed against a cable when the cable is arranged along the cable path 8, thereby creating a clamping connection between the spring element 3 and the cable. This connection will fix the cable inside the holding and contacting device 1.

(16) Further, the spring element 3 comprises a release pry 13. The release pry 13 is configured to release a connection of the holding and contacting device 1 and the cable. When the release pry 13 is pulled, the spring element 3 is deformed, thereby releasing the clamping force from the cable and allowing to detach the cable from the holding and contacting device 1.

(17) The release pry 13 comprises a first opening 17 and a second opening 18. The first opening 17 is arranged closer to the second end 10 than the second opening 18. In alternate embodiments, the release pry 13 may comprise only one opening or more than two openings.

(18) Additionally, the holding and contacting device 1 comprises an insulation block 19 which surrounds the cage 2. The insulation block 19 comprises an insulating material. The insulation block 19 is not shown in FIGS. 1 and 2. The insulation block 19 is shown in the FIGS. 3 and 4 which show cross-sectional views of the holding and contacting device 1.

(19) The insulation block 19 protects the cage 2 against mechanical forces which may be applied from the outside. In particular, the insulation block 19 may attenuate any mechanical force being applied to the holding and contacting device 1.

(20) Further, the insulation block 19 comprises a hole 20 which is extends in a direction parallel to the cable path 8. The insulation block 19 is shaped such that the only possibility to engage the release pry 13 is via the hole 20. It is possible to insert a tool, e.g., a flat standard screwdriver, into the hole such that the tool engages one of the openings 17, 18 of the release pry 13. Then, the release pry 13 can be pulled in a direction away from the cable path 8 by the tool. Depending on the position of the release pry 13, the tool can engage either the first opening 17 or the second opening 18.

(21) When the release pry 13 is pulled in a direction away from the cable path 8, the abutment section 11 of the spring element 3 is moved away from the cable path 8, thus allowing to remove a cable from the device 1.

(22) Thereby, it can be ensured that no accidental loosening of the connection can occur since only the pulling of the release pry 13 and simultaneously extraction of the cable allows to detach the cable from the holding and contacting device 1.

(23) The release pry 13 is configured to deform the spring element 3 in a manner such that its abutment section 11 is moved further away from the lower wall 5 of the cage 2.

(24) FIG. 3 shows a cross-sectional view of an assembly comprising the holding and contacting device 1, a cable 14 and a component 15. The component 15 is a power electronic component. The component 15 comprises a busbar 16 which is used to electrically contact the component 15. The cable 14 consists of copper or another material.

(25) The spring element 3 exerts a clamping force onto the cable 14, thereby pressing the cable 14 onto the component 15. In particular, the cable 14 and the component 15 are clamped between the spring element 3 and a lower wall 5 of the cage 2. In particular, the cable 14 is pressed onto the busbar 16 of the component 15 such that an electrical current can flow from the cable 14 into the busbar 16. Accordingly, an electrical connection of the cable 14 and the component 15 is provided. Furthermore, the clamping force exerted by the spring element 3 onto the cable 14 mechanically fixes the cable 14 to the component 15. Thereby, the spring element 3 ensures that the cable 14 cannot move relative to the component 15.

(26) The cable 14 is arranged between the component 15 and the spring element 3. Accordingly, the cable 14 is pressed onto a topside of the component 15. This design allows to arrange the component 15 in a low position, thereby enabling to construct a compact assembly.

(27) It can be seen in FIG. 3 that the sharp edge 12 of the spring element 3 slightly enters into the material of the cable 14. Thereby, an additional fixation of the spring element 3 and the cable 14 is achieved as the sharp edge 12 is clawed into the material of the cable 14. This additional fixation further adds to the mechanical fixation of the cable 14 inside the cable path 8 due to the clamping force exerted by the spring element 3.

(28) In order to disengage the cable 14 from the assembly, a user has to insert a tool into the opening 20 of the insulation block 19 such that the tool engages the second opening 18 of the release pry 13. Then, the release pry 13 can be pulled upwards, i.e., away from the cable, thereby deforming the spring element 3 such that the spring element 3 does no longer exert a clamping force onto the cable 14. Then the cable 14 can be removed. Accordingly, the second opening 18 allows to manually deform the spring element 3 when a cable 14 is arranged in the cable path 8 such that no clamping force is applied on the cable 14.

(29) FIG. 4 shows the assembly of FIG. 3 without the cable 14. In this configuration, the spring element 3 is more relaxed than in the configuration shown in FIG. 3. The spring element 3 is dimensioned such that, if only the component 15 and no cable 14 is present in the cable path 8, the spring element 3 will abut the busbar 16 of the component 15 and the spring element 3 will apply a small clamping force onto the component 15. Thereby, it can be ensured that the holding and contacting device 1 remains in its place even if the cable 14 is removed.

(30) The device 1 is configured such that it is able to connect the component 15 to a wide range of cables 14 having all kinds of different cable diameters. If a cable 14 is inserted into the cable path 8 in the configuration as shown in FIG. 4, the spring element 3 will be deformed such that its abutment section 11 is moved in a direction away from the lower wall 5 of the cage 2. The amount by which the spring element 3 is deformed depends on the diameter of the inserted cable 14. If a cable 14 having a rather small diameter is inserted into the cable path 8, the spring element 3 will be deformed by a rather small amount such that the spring element 3 will exert a small clamping force onto the small cable 14 and the component 15. The spring element 3 is dimensioned such that this clamping force is sufficient to fix the cable 14 to the component 15.

(31) If a cable 14 having a bigger diameter is inserted into the cable path 8, the spring element 3 will be deformed by a larger amount. Accordingly, the spring element 3 will exert a stronger clamping force onto the cable 14, thereby pressing it onto the component 15. Again, this force is sufficient to fix the cable 14 to the component 15.

(32) Accordingly, the holding and contacting device 1 is constructed such that a stronger force is exerted onto a cable 14 having a first diameter than on a cable having a second diameter which is smaller than the first diameter. The cable 14 having the first diameter will deform the spring element 3 to a greater extent than the cable having the second diameter. A greater deformation of the spring element 4 results in a stronger clamping force.

(33) The holding and contacting device 1 is constructed such that it is virtually impossible for the cable 14 to be released accidentally. Due to the shape of the spring element 3 and the sharp edge 12, a clamping is constructed which allows only purposely release of the cable 14.

(34) In order to insert a cable 14, the user first has to engage enter a tool into the hole 20 such that the tool engages the first opening 17 of the release pry, thereby enabling to pull the release pry 13 away from the busbar 16. Thereby, the spring element 3 is deformed such that it provides space along the cable path 8, allowing to insert the cable 14 into the cable path 8. Accordingly, the first opening 17 allows to manually deform the spring element 3 when no cable 14 is arranged in the cable path 8 such that no clamping force is applied on the component 15.