JP3069671U - Contact element for radial contact connection - Google Patents

Abstract

(57) Abstract: A contact member, in particular a contact member for a radial contact connection of the cylindrical connection contacts (3, 4) of the device (1), in which case at least one cylindrical connection Contact 3,
4, in which one spring contact is provided for each contact connection, each spring contact 8,
9 has two spring-elastic fork contact sides 13, 14, between which the connection contacts 3, 4 are clamped and received. The contact element according to the invention has a compact axial dimension and is used both as a single plug and as a contact element for two or more concentric connection contacts.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The invention relates to a contact element, in particular a contact element for the radial contact connection of a cylindrical connection contact of a device, in which case at least one spring for contact connection of at least one cylindrical connection contact. It relates to a type provided with a contact.

[0002]

[Prior art]

 The contact points of the actuators are arranged concentrically inside and outside one another for the contact connection of the electrical interface of the device, in particular of the hydraulic actuators of the automotive technology. The inner connection contacts are formed as solid cylindrical contacts, and the outer connection contacts are formed as hollow cylindrical contacts arranged around the inner connection contact. An insulating member is provided between both connection contacts. The inner connecting contact is additionally formed longer than the outer connecting contact, so that the inner connecting contact protrudes from the outer connecting contact. Alternatively, both the inner connection contact and the hollow cylindrical contact can be formed in the form of a sleeve by means of a roller.

[0003] Various contact members are known which enable a radial contact connection of the connecting contact. In that case, the contact members respectively contact around the cylindrical connection contacts. The problem with conventional contact members is that a reliable electrical connection with the connecting contacts must be guaranteed. This must be the case even if the connecting contact is rotatable, for example, about its axis. Therefore, a flat contact structure is often unsuitable for tolerance mechanical and spring mechanical reasons, since the bending bar (Biegebalken) must be bent through high edges. In that case, the spring mechanic feature of the contact member is extremely small. On the other hand, conventional solutions, for example in the case of the use of clamping sleeves, are often significantly larger in the axial direction, and thus require unnecessarily large space when contacting.

[0004]

[Problem to be solved by the invention] An object of the invention is to improve a contact member of the above-described type so that a small mounting space is required when a radial connection is made to a contact point, In addition, the material requirements for the contact members are to be reduced, despite the excellent contact characteristics.

[0005]

[Means for Solving the Problems]

 According to the invention, each of the spring contacts has two resilient fork contact sides, between which the connection contacts are clamped. It is solved by being accepted.

According to the invention, it has been recognized that fork-shaped contact members are particularly advantageous for contacting cylindrical connection contacts. However, rigid fork-type contacts are not enough to produce electrical coupling with very low contact resistance at the contact points. Therefore, two uniquely spring-elastic fork contact sides are provided.

[0007]

[Effect of the invention]

 An advantage of the present invention is that no plastic deformation of the contact member, that is, the fork-shaped contact occurs. Due to the particularly advantageous spring-elastic design of the fork contact side, the contact element is advantageously automatically adapted to various diameter errors of the connecting contacts by means of a predefined soft spring characteristic curve. The solution according to the invention allows compact dimensions in the axial direction and is provided both as a single plug and as a contact element for two or more concentric connection contacts. Two or more connection contacts arranged side by side can also be connected simultaneously by one contact member.

[0008] According to one particularly advantageous configuration of the invention, fork-shaped fork contacts which are arranged at a slight distance from one another for the contact connection of two connecting contacts which are adjacent to one another and in particular are arranged concentrically. Two spring contacts are provided. The two spring contacts can be arranged at right angles to the fork contact plane, in which case the spacing between the two fork contact sides of the fork contact corresponds to the diameter of the cylindrical connecting contact. It is possible to change.

It is advantageous if the two spring contacts are arranged correspondingly offset from the two cylindrical connecting contacts. The cylindrical connecting contacts have different lengths, are arranged concentrically inside and outside of each other, and are insulated from one another via a ring insulator. The ring insulator projects radially outward at the peripheral edge of the outer connection contact, so that both contact members are likewise separated or insulated from each other by the insulation of the connection contact . The insulator also prevents short circuits between the connecting contacts or between the contact members due to metal chips. The ring insulator therefore has a large diameter over a short axial region or in comparison with the diameter of the radially outer connecting contact. By means of the contact elements for the two concentric cylindrical connecting contacts arranged inside and outside of one another, these connecting contacts are preferably connected radially by the fork contact side. The construction space of the contact element with both spring contacts is particularly small, and the contact element can be manufactured particularly advantageously due to the low material requirements.

[0010] It is advantageous if the spring contacts are each produced from a single contact sheet by a plurality of bending and folding processes. Before being bent or edged, the flat contact lamella is initially substantially U-shaped and integrally formed. For example, the contact members can be stamped from the stamped grid with the stamped grid conductor tracks, and then the U-shaped termination region is reworked with multiple bends or edge bends to form spring contacts. It is. The lateral legs of the U-shaped contact lamella then form a fork contact side. In that case, the fork contact side is first bent towards the connection contact in the first region, in other words towards the inside of the fork, and in a direction away from the connection contact in the region located laterally outside. Bendable. The fork contact side thus particularly advantageously forms a spring-elastic contact area which is adjusted to the diameter error of the connecting contact.

The bend edges to bend the area towards the connecting contact and in the direction away from each other extend parallel to the fork plane. As a result, a contact member is formed, which has a V-shaped fork contact side surface as viewed from the front and which contacts one connection contact with one bending edge. It is advantageous if each fork-shaped spring contact has a connecting web, one fork-contacting side connected to each end of the connecting web. In that case, the fork contact sides are arranged at right angles to the connecting web. A conductor is connected to the connecting web, which makes it possible to connect to the stamping grid. Each of the two spring contacts of the contact member can be formed integrally with its connecting conductor.

Advantageously, the fork contact sides have, at their open ends, guide ramps to facilitate the reception of the connection contacts. The upper portion of the fork-shaped contact is bent forward or backward as described above to provide stability to the contact member. In addition, guide ramps may be provided towards the open side of the fork-shaped spring contact, for example by bending up the front side of the fork contact side, or by cutting off the front area of the fork contact side.

In a further preferred embodiment of the invention, the insulator provided at the connection contact of the electrical device is formed as a ring insulator. The ring insulator protrudes radially between both connection points. On one side, the insulation of the connecting conductors of the two spring contacts is provided by the insulator, and on the other side a spacing is provided between the two spring contacts.

It is advantageous if the spring contact is supported or guided on the one hand by an insulator between the connecting contacts and on the other hand between the outer casings. In that case, the insulator present between the connecting contacts of the electrical device is used as an insulating separating member and a guiding member for the two fork-shaped spring contacts, whereby the insulating protective casing is provided. The wall thickness and thus the construction space and materials can be saved. The fork-shaped spring contacts are guided and protected between the outer casing, for example the casing of the contact chamber, and the insulator of the actuator. The solution proposed according to the invention allows for a compact axial dimension and can also be used for a contact element with only one spring contact for a single plug. In principle, according to the invention, one single plug has two spring contacts.

[0015] The connection contact can rotate relative to the spring contact about its own longitudinal axis. The guide ramp, which can be seen from above and from the side, makes it possible to simultaneously find a plurality of contact points, for example, when a plurality of actuators in one module are arranged in rows. This allows a single spring contact to supply current to a plurality of connection contacts located inside and outside of each other.

[0016]

[Embodiment of the invention]

 Next, the present invention will be described in detail with reference to the illustrated embodiment.

FIG. 1 shows a hydraulic actuator with an electrical interface 2. The electrical interface 2 has a cylindrical elongated first connection contact 3 and a hollow cylindrical second connection contact 4 arranged concentrically with respect to the connection contact 3 located inside. I have. The inner contact 3 is in this case formed relatively long in a direction parallel to the axis of rotation of the contacts 3, 4, so that its end region projects beyond the contact 4. ing.

A ring-shaped insulator 5 having a collar 6 on the end side is provided between the connection contacts 3 and 4. The collar 6 prevents a short circuit between the two connection contacts 3, 4 due to, for example, metal debris. The insulator 5 and its collar 6 are preferably made of plastic. A contact element 7 with two spring contacts 8, 9 is provided for the electrical contact connection of the connection contacts 3, 4 of the hydraulic actuator 1. The spring contact 8 is in conductive contact with the connection contact 4 and the spring contact 9 is in conductive contact with the connection contact 3. A conductor track 10 or 11 is connected to the spring contacts 8, 9 for connection to a stamping grid which serves as a current conductor. These conductor tracks 10, 11 can themselves be components of a stamping grid. In this case, the spring contacts 8, 9 are formed integrally in the end region of the stamped grid by edge bending and bending.

As can best be seen from FIG. 2, the spring contacts 9 are formed substantially in the form of forks, with one fork contact side 13 and one fork contact side 13 on each side of the connecting web 12 connected to the conductor track 11. 14 are arranged. The spring contact 9 radially contacts the outer periphery of the cylindrical connection contact 3 on the fork contact side surfaces 13 and 14 on both sides. The two fork contact sides 13, 14 each have one region 15 bent towards the connection contact and one region 16 bent away from the connection contact 3. Due to the two regions 15, 16, the fork contact sides 13, 14 have a spring-elastic bending characteristic, so that the diameter error of the connection contacts 3, 4 is compensated.

The fork-shaped spring contact 9 can be manufactured from a substantially U-shaped substrate by bending a thin plate a plurality of times. For example, the joining web 12 can be bent along a first bending edge 17 and the fork contact sides 13, 14 can be edged at least twice along a bending edge arranged parallel to the fork surface. It is bent.

FIG. 3 shows the two spring contacts 8, 9 in a side view. The fork-shaped spring contact 8 is arranged in a region 16 bent in a direction away from the connection contact 4, and adjacent to the region 16 of the spring contact 9 bent in a direction away from the connection contact 3. A ring-shaped collar 6 of an insulator 5 is arranged between the two spring contacts 8 and 9, and this ring-shaped collar serves as both contact members 7 when the connection contacts 3 and 4 are fitted. And insulates both spring contacts 8, 9 from each other.

A casing 18 may be provided to accommodate both spring contacts 8, 9 and to protect these spring contacts from environmental influences and adjacent uninsulated stamped grid sections. it can.

[Brief description of the drawings]

FIG. 1 is a side view of an electrical device with concentrically arranged cylindrical connecting contacts to which the contact members according to the invention are conductively connected.

FIG. 2 is a view of a contact member and a cylindrical connection contact located inside viewed from above in the direction of arrow X in FIG. 1;

FIG. 3 is a view of the contact member according to the present invention as viewed from the direction of arrow Y in FIG. 1;

[Explanation of symbols]

1 actuator, 2 interfaces, 3, 4
Connection contact, 5 insulator, 6 collar, 7 contact member, 8, 9 spring contact, 10, 11 conductor path,
12, connecting web, 13, 14 fork contact side,
15, 16 area, 17 bending edge, 18 casing

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) The creator Thomas Gramkov Germany Ostfildern Paracell Suseweg 10 (72) The creator Ewald Spies Feichingen / Enz Helmut-Ulmer-Strasse 38

Claims (13)

[Utility model registration claims] 1. A contact element for a radial contact connection of a contact element, in particular of a cylindrical connection contact (3, 4) of a device (1), wherein at least one cylindrical connection contact is provided. In the form in which one fork-shaped spring contact (8, 9) is provided for each contact connection of (3, 4), each spring contact (8, 9) is provided with two spring-elastic contacts. A contact element having fork contact sides (13, 14), between which connection contacts (3, 4) are clamped and received. 2. The contacting of two connecting contacts (3, 4) which are adjacent to one another and in particular are arranged concentrically.
2. The contact element according to claim 1, wherein two fork-shaped spring contacts (8, 9) are arranged next to each other. 3. Two cylindrical connecting contacts (3, 9) having different lengths and being concentrically arranged inside and outside each other and insulated from each other. The contact member according to claim 1 or 2, wherein the contact member is arranged so as to be shifted corresponding to (4). 4. The contact element as claimed in claim 1, wherein the spring contacts are formed from one contact sheet by a plurality of bending and folding operations. 5. The contact element according to claim 1, wherein the contact lamella is substantially U-shaped and integrally formed before the contact lamella is bent or folded. 6. The fork contact side surfaces (13, 14) are each formed as a spring-elastic thin plate contact, one area (15) of which is directed towards the connection contact (3, 4). 6. The contact element according to claim 1, wherein one end region is bent away from the connection contacts. 7. The contact element according to claim 6, wherein the bending edges to bend the area towards the connecting contact and in the direction away from each other extend parallel to the fork plane. 8. Each fork-shaped spring contact (8, 8).
9) has a connecting web (12), to which one fork contact side (13, 14), which is arranged at right angles to the connecting web (12), is connected to the end of the connecting web. A contact member according to any one of claims 1 to 7. 9. The contact element as claimed in claim 1, wherein the connecting web is connected to a conductor which enables connection to the stamping grid. 10. The fork contact sides (13, 14) have, at their open ends, guide ramps for facilitating the reception of connection contacts (3, 4). The contact member according to claim 1. 11. The insulation provided at the connection contacts (3, 4) of the electrical device is formed as a ring insulation which creates a radial spacing of the connection conductors or a spacing between the spring contacts (8, 9). The contact member according to any one of claims 1 to 10, wherein the contact member is formed. 12. The spring contact (8, 9) is insulated between the connecting contact (3, 4) and the outer casing (18) by an insulator (5) and is supported or guided. The contact member according to any one of claims 1 to 11. 13. The contact element according to claim 1, wherein the connecting contact rotates relative to the spring contact about its longitudinal axis.