CN204760592U - A contact member and should insert formula connector that is used for electric formula connector of inserting - Google Patents

Abstract

The utility model relates to a contact element for an electric plug-in connector and the plug-in connector. The contact element includes a cylindrical contact (10), and the contact has a corresponding contact element (2) for distribution Socket (11) and cylindrical section (14) inserted in insertion direction (E). A plurality of contact pieces (12) protrude from the cylindrical section (14) in the insertion direction (E) and are arranged around the socket (11). A plurality of slots (13) extend in the insertion direction (E) and, viewed in a circumferential direction around the insertion direction (E), separate the contact pieces (12) from each other. Wherein, the thickness (T) of each contact piece (12) measured radially relative to the insertion direction (E) is 0.5mm to 1.5mm, and the thickness (T) of each contact piece (12) measured along the insertion direction (E) The resulting length (L) is 5 mm to 15 mm. This makes it possible to provide a contact element which is both suitable for transmitting relatively high currents and which also achieves a relatively high contact force with respect to a corresponding contact element which is plugged to said contact element.

Description

Contact elements for electrical plug-in connectors and the plug-in connector

technical field

The utility model relates to a contact element for an electric plug-in connector, which comprises a cylindrical contact, and the contact has

socket, which can be inserted in the insertion direction of the associated corresponding contact element,

cylindrical section,

a plurality of contact pieces protruding from the cylindrical section in the insertion direction and arranged around the socket, and

A plurality of slits extending in the insertion direction and separating the contact pieces from one another as viewed in a circumferential direction around the insertion direction.

Background technique

Such a contact element has a cylindrical contact in which a socket is formed. An associated counter contact element can be inserted into the socket in the insertion direction. The contact has a cylindrical section and a plurality of contact pieces protruding from the cylindrical section in an insertion direction and arranged around the socket. A plurality of slots extends between the contact lugs in such a way that the contact lugs are spaced apart from each other, viewed in a circumferential direction around the insertion direction.

By way of example, such a contact element can be a component part of a plug-in connector (for example a charging plug or the like) which optionally transmits relatively high currents. After the corresponding contact element is inserted into the socket of the contact of the contact element, the contact element makes electrical contact with the corresponding contact element, so that electric current can flow between the contact element and the corresponding contact element.

Especially when the electrical device is switched on, for example at the start of the charging process in the case of a plug-in connector built as a charging plug, inrush currents several times higher than the normal current flowing in steady state can occur (English :SurgeCurrents). These surge currents may cause damage to the contact elements if they are not suitable for carrying such surge currents.

In order to improve the current-carrying capacity of the contact elements, the thickness of the contact lugs can in principle be increased. And when the corresponding contact element is inserted into the socket of the contact of the contact element, there needs to be a large enough contact force between the contact element and the corresponding contact element, which makes the contact piece on the contact pin of the corresponding contact element produce enough to realize good The pressing force of the electrical contact, on the other hand, serves to hold the counter contact element on the contact element. If the contact lugs are made thicker, the elasticity of the contact lugs and thus the contact force may be adversely affected.

For example, EP1868266A1 and FR2450510A1 disclose contact elements using contact pieces to make electrical contact with contact pins of corresponding contact elements.

Utility model content

The object of the present invention is to provide a contact element which is suitable for transmitting relatively high currents and which can also provide a relatively high contact force for a corresponding contact element plugged into said contact element.

The solution of the utility model to achieve the above object is to provide a contact element for an electrical plug-in connector, comprising a cylindrical contact, the contact has

socket, which can be inserted in the insertion direction of the associated corresponding contact element,

cylindrical section,

a plurality of contact pieces protruding from the cylindrical section in the insertion direction and arranged around the socket, and

a plurality of slits extending in said insertion direction and, viewed in a circumferential direction around said insertion direction, said slits separating said contact pieces from each other,

It is characterized in that the thickness of each contact piece measured radially relative to the insertion direction is 0.5 mm to 1.5 mm, and the length measured along the insertion direction is 5 mm to 15 mm.

Accordingly, each contact piece's

- a thickness of 0.5mm to 1.5mm measured radially with respect to said direction of insertion, and

- a length measured along said insertion direction of 5 mm to 15 mm.

Specifically, the thickness may be 0.5 mm to 1.0 mm, especially 0.6 mm to 0.9 mm, for example 0.65 mm to 0.85 mm.

The length can be, for example, 6 mm to 12 mm, in particular 7 mm to 10 mm.

The utility model is based on the following understanding: in order to provide a contact element that has a relatively high current-carrying capacity, is not sensitive to even a large surge current, and can achieve a large enough contact force to contact the corresponding contact element, the contact The thickness of the sheet and the length of the contact sheet must be closely matched to each other. Therefore, in order to improve the current-carrying capacity, the thickness of each contact piece measured radially relative to the insertion direction can be designed to be larger than that of conventional contact elements, for example, to be increased to 0.65 mm to 0.85 mm. This solution will generally cause the stiffness of the contact piece to increase, but it can be compensated by the following method: the length of the gap between the contact pieces, and then the length of the contact piece (equal to the length of the gap) is increased overall, for example increased to 7mm to 10mm.

Tests have proved that, when the thickness value and length value of each contact piece match each other extremely, both a large current-carrying capacity and a large contact force can be realized.

The contact pin is preferably in one piece, for example made of brass. In principle, however, the contact pins can also consist of other materials, for example copper or the like.

For example, the contact element can be produced as a solid cylindrical contact. A bore is first applied in this solid contact pin to provide the socket. The contact lugs are subsequently produced by providing the slots longitudinally in the insertion direction, for example by sawing or milling.

Depending on the diameter of the contact pin of the corresponding contact element, the diameter of the socket can be, for example, 1 mm to 10 mm, in particular 2 mm to 5 mm.

For the electrical contacting of conductors with a relatively large conductor cross-sectional area, for example, contact pins with a relatively large diameter and corresponding sockets with a correspondingly large diameter are used. For conductors with a smaller conductor cross-sectional area, select a correspondingly smaller diameter.

For example, the stylus of the corresponding contact element may

- for a wire cross-sectional area of 2.5mm2, with a diameter of ^2mm ,

- 2.5mm diameter for a wire cross ^- sectional area of 4mm2,

- 3.0mm diameter for a wire cross ^- sectional area of 6mm2,

- 4.0mm diameter for a wire cross ^- sectional area of 10mm2.

The diameter of the socket matches the above diameter.

The contact lug preferably extends obliquely to the insertion direction in such a way that the socket tapers from the cylindrical section of the contact towards the end of the contact lug facing away from the cylindrical section. Thus, the contact piece forms a (smaller) bevel to the insertion direction in such a way that the receptacle tapers towards the entrance into which the contact pin of the counter contact element can be inserted. In the region of this entry, the width of the socket is smaller than the width of the contact pin of the counter contact element, thereby providing an interference fit for clamping contact with the counter contact element.

To produce the contact element, the contact lugs can first be shaped from solid cylindrical contact pins in order to subsequently press the contact lugs radially inwards so that they can be inclined. After cutting the contact strips by providing slots on the contacts, the contact strips are pressed against each other at the ends of their cylindrical sections facing away from the contacts, so that the contact strips are inclined and Create the tapered socket.

The contacts can have, for example, four or six contact blades. For example, four contact lugs can be used when forming a contact element for a conductor with a conductor cross-sectional area of, for example, 2.5 mm ² . In the case of larger conductor cross-sections, contact elements with six contact lugs can be used.

The slot width of the slot, measured in the circumferential direction around the insertion direction, is preferably 0.25 mm to 0.75 mm. The slit width may be, for example, 0.5 mm. The slot width must be large enough so that (when manufacturing the contact element with a solid cylindrical contact) the contact pieces are pressed against each other after setting these slots, so that the contact pieces are inclined and gradually obtained. Tapered socket.

The plug-in connector preferably has a contact element of the above-mentioned type and a corresponding contact element which needs to be inserted into the socket of the contact of the contact element by means of a contact pin. The diameter of the contact pin, measured radially relative to the insertion direction, can be, for example, 1 mm to 10 mm, in particular 2 mm to 5 mm. The length of the contact pin measured along the insertion direction may be 5 mm to 20 mm, in particular 8 mm to 18 mm, for example 10 mm to 16 mm.

By means of the contact elements and the corresponding contact elements plugged thereon, the plug-in connector can transmit currents with a current strength greater than 20 A (for example greater than 40 A) and at the same time provide a good contact force. The contact force is, for example, 5 N to 15 N, in particular 8 N to 11 N. Therefore, the contact force is sufficient to provide sufficient pressing force for good electrical contact of the contact piece with the contact pin.

Description of drawings

1 is a view of a plug-in connector comprising a contact element and a corresponding contact element to be inserted into the contact element;

2A-2D are views of several contact elements using different sizing schemes;

Figure 3 A is a side view of the contact element in its original state;

Figure 3B is a front view of the contact element in its original state;

Fig. 3 C is a longitudinal sectional view along line A-A shown in Fig. 3 A;

Figure 4A is a side view of a contact element in an operative state with the contact blades pressed against each other; and

Figure 4B is a front view of the contact element in the working state.

Detailed ways

Below in conjunction with several embodiments shown in the accompanying drawings, the concept based on the utility model is further described:

FIG. 1 shows an exemplary embodiment of a plug-in connector with a contact element 1 as a first plug-connector part and a counter-contact element 2 as a second plug-connector part. The contact element 1 can be, for example, a component of a charging plug, while the counter contact element is a component of an associated charging socket into which the charging plug can be plugged. But this embodiment does not constitute a limitation to the utility model. In principle, the contact element 1 and the counter contact element 2 can be part of quite different embodiments of the plug connector part.

The contact element 1 has a socket 11 into which a counter contact element 2 can be inserted in an insertion direction E by means of a contact pin 20 . The tip 200 of the contact pin 20 is rounded, so the contact pin 20 can be easily inserted into the socket 11 by means of the tip 200 , and snapped into the socket 11 in such a way that electrical contact occurs after insertion.

The contact element 1 has a cylindrical section 14 from which several contact lugs 12 extend in the insertion direction E. As shown in FIG. The contact element 1 is produced as a one-piece contact 10, of which a cylindrical section 14 and a contact lug 12 extending from it are integral parts.

The contact strips 12 are separated from one another by means of several slots 13 .

The contacts 10 can be produced in one piece, for example from brass or another electrically conductive material, such as copper.

2A to 2D show different embodiments of a contact element 1 comprising a contact 10 in a raw state. The contact element 1 is produced in particular by providing a socket 11 embodied as a bore in the essentially cylindrical contact 10 . The contact strips 12 are spaced apart from each other by providing gaps 13 , resulting in the contact 10 in its original state as shown in FIGS. 2A to 2D .

To bring the contact 10 into the operating state, the contact lugs 12 are then pressed radially against each other at their ends facing away from the cylindrical section 14 , as shown in the transition from FIG. 3A to FIG. 4A . This causes the contact piece 12 to form a (smaller) oblique angle with the insertion direction E, thereby producing a socket 11 tapering towards the end of the contact piece, which at its entrance facing away from the cylindrical section 14 meets the corresponding contact element 2 with stylus 20 interference fit.

The contact elements 1 shown in FIGS. 2A to 2D have different dimensions and are suitable for contacting electrical conductors with different conductor cross-sectional areas. For example, the contact element 1 shown in FIG. 2A is suitable for a wire with a wire cross-sectional area of 2.5 mm ² . Such a contact element 1 has four contact lugs 12 . The contact elements 1 shown in FIGS. 2B to 2D are suitable for contacting wires with a larger cross-sectional area (for example, 4 mm ² to 10 mm ² ) and each has six contact pieces.

3A to 3C are different views of the contact element 1 in its original state. In contrast, FIGS. 4A and 4B are views of the contact element 1 in the operating state and with an inclined contact lug 12 .

At their ends facing away from the cylindrical section 14 , the contact lugs 12 each have a bevel 120 in order to introduce the contact pin 20 of the corresponding contact element 2 in the insertion direction E. As shown in FIG. In the operating state, the contact pieces 12 are pressed radially towards each other by their ends, so that the contact element 1 extends conically to the ends of the contact pieces 12 as shown in FIG. 4A .

The contact element 1 together with the counter contact element 2 can provide an electrical contact which has a high current-carrying capacity and which is also insensitive to inrush currents, in particular when the electrical device is switched on. In addition, there is a high contact force, which causes the contact piece 12 to generate a high pressure force on the contact pin 20 in order to achieve a good electrical contact.

To achieve both a high current carrying capacity and a high contact force, the thickness T (see FIG. 3C ) and length L (see FIG. 3A ) of the contact piece 12 are dimensioned in a certain way.

Therefore, the thickness T is 0.5 mm to 1.5 mm, for example, 0.65 mm to 0.85 mm. The length L is 5 mm to 15 mm, in particular 7 mm to 10 mm. A good current-carrying capacity can be achieved by selecting the radial thickness T of the contact strip 12 to be relatively large. By selecting the length L of the contact lug 12 to be relatively large, however, sufficient elasticity can be produced in the contact lug 12 so that a good contact force is achieved when the contact pin 20 is inserted into the socket 11 .

The length L of the contact piece 12 is equal to the length of the slot 13 . Therefore, the length of the contact pieces 12 is equal to the length for cutting the contact pieces 12 from each other.

For example, the slit width b of each slit 13 may be 0.25 mm to 0.75 mm, such as 0.5 mm. The slot width b has to be chosen sufficiently large to tilt the contact lugs 12 by radially pressing them together as shown in FIGS. 4A and 4B .

The thickness d of the contact pin 20 (see FIG. 1 ) is selected in such a way as to achieve an interference fit with the tapered entrance of the socket 11 . For example, for a wire with a wire cross-sectional area of 2.5 mm ² , the width of the socket 11 at the entrance is 1.65 mm, and the thickness d of the contact 20 is 2.00 mm.

In principle, the length l of the contact pin 20 can be freely selected. For example, the length l may be 5 mm to 20 mm, such as 10 mm to 16 mm.

The idea on which the invention is based is not limited to the exemplary embodiments described above, but can in principle also be realized in completely different types of embodiments.

Contact elements of the type described in this application can in principle be used in different types of plug-in connectors. The contact elements are adapted to make contact with suitable counter contact elements and in particular are manufactured in one piece from an electrically conductive material, in particular brass.

The number of contact pieces can be different from the description of the present case.

Table of reference signs

1 contact element

10 contacts

11 sockets

12 contact piece

120 bevel

13 gaps

14 cylindrical sections

2 Corresponding contact elements

20 stylus

200 tip

b width

dthickness

E Insertion direction

l, L length

Claims (22)

1. A contact element for an electrical plug-in connector comprising a cylindrical contact (10) having socket (11), which can be inserted in the insertion direction (E) of the associated corresponding contact element (2), Cylindrical section (14), a plurality of contact blades (12) protruding from the cylindrical section (14) in the insertion direction (E) and arranged around the socket (11), and a plurality of slits (13) extending in said insertion direction (E) and viewed in a circumferential direction around said insertion direction (E), said slits separating said contact pieces (12) from one another, It is characterized in that each contact piece (12) a thickness (T) measured radially with respect to said insertion direction (E) of 0.5 mm to 1.5 mm, and The length (L) measured along said insertion direction (E) is 5 mm to 15 mm. 2. Contact element according to claim 1, characterized in that the thickness (T) is 0.5 mm to 1.0 mm. 3. Contact element according to claim 2, characterized in that the thickness (T) is 0.6 mm to 0.9 mm. 4. The contact element according to claim 2, characterized in that the thickness (T) is 0.65 mm to 0.85 mm. 5. The contact element according to claim 1, characterized in that said length (L) is 6 mm to 12 mm. 6. Contact element according to claim 5, characterized in that said length (L) is 7 mm to 10 mm. 7. The contact element according to claim 1, characterized in that the contact (10) is in one piece. 8. The contact element according to claim 1, characterized in that the contact (10) is made of brass. 9. The contact element according to claim 1, characterized in that the diameter (D1) of the socket (11), measured radially with respect to the insertion direction (E), is 1 mm to 10 mm. 10 . The contact element according to claim 9 , characterized in that the diameter ( D1 ) of the socket ( 11 ), measured radially with respect to the insertion direction (E), is 2 mm to 5 mm. 11 . 11. The contact element according to claim 1, characterized in that the contact piece (12) extends obliquely to the insertion direction (E) in such a way that the socket (11) extends from the contact Starting from the point (10), the cylindrical section (14) tapers towards the end of the contact piece (12) facing away from the cylindrical section (14). 12. The contact element according to claim 1, characterized in that the contact (10) has four or six contact blades (12). 13. The contact element according to claim 1, characterized in that the gap (13) has a gap width (b) measured in the circumferential direction around the insertion direction (E) of 0.25 mm to 0.75 mm. 14. The contact element according to claim 13, characterized in that the gap (13) has a slot width (b) of 0.5 mm, measured in the circumferential direction around the insertion direction (E). 15. A plug-in connector, comprising a contact element (1) as claimed in claim 1 and a corresponding contact element (2), said corresponding contact element having a socket (11) into which said contact (10) can be inserted pins (20). 16. The plug-in connector according to claim 15, characterized in that the diameter (d) of the contact pin (20), measured radially with respect to the insertion direction (E), is 1 mm to 10 mm. 17. The plug-in connector according to claim 16, characterized in that the diameter (d) of the contact pin (20), measured radially with respect to the insertion direction (E), is 2 mm to 5 mm. 18. The plug-in connector according to claim 15, characterized in that the length (1) of the contact pin (20) measured along the insertion direction (E) is 5 mm to 20 mm. 19. The plug-in connector according to claim 18, characterized in that the length (1) of the contact pin (20), measured along the insertion direction (E), is 8 mm to 18 mm. 20. The plug-in connector according to claim 18, characterized in that the length (1) of the contact pin (20), measured along the insertion direction (E), is 10 mm to 16 mm. 21. The plug-in connector according to claim 15, characterized in that, as far as the corresponding contact element (2) inserted into the socket (11) of the contact element (1) is concerned, in the contact pin (20) The contact force acting between the contacts (10) is 5N to 15N. 22. Plug-in connector according to claim 21, characterized in that, as far as the corresponding contact element (2) inserted into the socket (11) of the contact element (1) is concerned, at the contact pin (20) The contact force acting between the contacts (10) is 8N to 11N.