EP2118972B1 - Overvoltage protection magazine - Google Patents

Abstract

An overvoltage protection magazine includes a plastic housing, electric contacts, overvoltage protection elements, and at least one contact edge. The electric contacts are disposed in the plastic housing and have an insertion region and a contact region. The electric contacts are disposed in a row in the insertion region. The plastic housing has receptacles for the overvoltage protection elements, which are disposed on both sides (e.g., Left and Right) along the longitudinal direction. The contact regions of the electric contacts protrude into the respective receptacles and establish a first electric contact to the respective overvoltage protection element. The contact edge has spring contact elements in the region of the receptacles, which establish the second contact to the overvoltage protection element.

Description

The invention relates to a surge protection magazine for insertion into a terminal block for telecommunications and data technology.

Such a surge protection magazine is for example from the DE 103 17 621 A1 known.

From the DE 10 2004 017 605 B3 a connector for printed circuit boards is known, comprising a number of contact elements, wherein the contact elements each have two terminal sides, wherein the one terminal side as a insulation displacement contact for connecting wires and the other terminal side as a fork contact for contacting pads are formed on a printed circuit board , The contact element is formed in two parts, wherein a first part of the contact element comprise the insulation displacement contact and the second part of the fork contact, wherein in each case a contact leg is arranged on both parts of the contact element, wherein the two contact legs form a separating contact. In such a series of isolating contacts then a surge protection magazine can be inserted.

From the US-A-4 504 883 an overvoltage protection magazine is known, comprising a plastic housing, electrical contacts, overvoltage protection elements and at least one contact comb, wherein the electrical contacts are arranged in the plastic housing and each have a Einsteckbereich and a contact region, wherein the electrical contacts are arranged in the insertion region in a row, the plastic housing Has receptacles for the overvoltage protection elements, wherein the contact areas of the electrical contacts protrude into the respective receptacle and a first electrical contact to the respective overvoltage protection element and the contact comb has resilient contact elements in the region of the receptacles which produce the second contact with the overvoltage protection element. The recordings are arranged in two mutually offset rows on one side.

The invention is based on the technical problem of providing a surge protection magazine which has a compact construction.

The solution of the technical problem results from the subject matter with the features of claim 1. Further advantageous embodiments of the invention will become apparent from the dependent claims.

For this purpose, the overvoltage protection magazine comprises a plastic housing, electrical contacts, overvoltage protection elements and a contact comb, wherein the electrical contacts in the plastic housing are arranged and each having a plug-in area and a contact area, wherein the electrical contacts are arranged in the insertion in a row, the plastic housing has receptacles for the overvoltage protection elements, which are arranged on both sides along the longitudinal direction, wherein the contact areas of the electrical contacts in the respective Projecting receptacle and produce a first electrical contact to the respective overvoltage protection element and the contact comb has resilient contact elements in the region of the receptacles, which produce the second contact to the overvoltage protection element. Since no overvoltage protection elements are arranged one above the other, the height of the overvoltage protection magazine is very low, whereby at the same time a high packing density is achieved by the two adjacent rows. The actual fixation is done mainly by the resilient elements of the contact comb from the outside, so that the plastic body must absorb less forces. Furthermore, this simplifies the design of the electrical contacts, since they must be formed in the receptacle only as a rigid mating contact, for example in the form of a metal strip which is supported against the inner rear wall of the receptacle. The overvoltage protection elements are preferably designed as 2-pole overvoltage protection gas discharge. The overvoltage protection element is preferably cylindrical, wherein the bottom surfaces have the contacts, the overvoltage protection element is therefore pressed with the bottom surface against the contact region of the electrical contact in the receptacle. The electrical contacts are preferably made of metal, wherein the adjacent electrical contacts are preferably bent differently, since they are arranged in the insertion region in a row, but are alternately guided with their contact area in a left and right recording. This embodiment has the advantage that crossings of contacts are avoided.

In a preferred embodiment, the contact comb is U-shaped and has at its legs each resilient contact elements. This has the advantage of a symmetrical distribution of forces.

In a further preferred embodiment, the receptacles for the overvoltage protection elements on the two sides are arranged offset from one another. On the one hand, this has the advantage that the electrical contacts can be guided more easily. Another advantage is the better stability.

In a further preferred embodiment, the resilient contact elements of the contact comb are formed as free cuts. For embodiments where the receptacles are arranged offset from each other, the cutouts are offset from the two legs, which increases the stability of the contact comb.

In a further preferred embodiment, a ground contact is arranged on at least one end face of the contact comb, via which the overvoltage protection elements can be connected to ground or ground.

In a further preferred embodiment, the ground contact is designed as a double fork contact or comprises two fork contacts. As a result, on the one hand creates a certain degree of redundancy for the ground connection and on the other hand increases the current carrying capacity.

In a further preferred embodiment, the electrical contacts are formed as contact gratings, which are punched free through openings in the plastic housing. This has the advantage that the electrical contacts in the manufacture of the plastic housing easy be umumspritzt so that they sit firmly in the housing. This is possible because the electrical contacts themselves do not have to be resilient, but the entire spring force is applied by the contact comb from the outside. By the free punching then the electrical contacts of the contact grid are subsequently separated from each other electrically.

In a further preferred embodiment, the receptacles have a circular cross-section, so that the preferably cylindrical overvoltage protection elements can be easily accommodated. Further preferably, the receptacle is open to the top to the top, wherein the opening angle is less than 180 °, more preferably less than 90 °. This prevents that the overvoltage protection elements can slip upwards.

In a further preferred embodiment, sliding elements are arranged above the receptacle, which are formed with a bevel. This allows, despite a smaller opening angle of less than 180 °, a fitting of the overvoltage protection elements from above. They run along the slope and then fall obliquely into the receptacle.

In a further preferred embodiment, the edge of the bevel over against the overvoltage protection element. This ensures that when sliding the contact comb, the resilient contact elements of the contact comb slide over the slope and touch the overvoltage protection element only on the bottom surface. This reduces the risk of damage to the contact metallization on the overvoltage protection element. Furthermore, this increases the mounting safety, since jamming or tilting of the overvoltage protection elements is prevented.

In a further preferred embodiment, the contact comb is formed with at least one locking tab, which preferably as the resilient contact elements is formed by free cuts. Further preferably, the contact comb on two locking tabs, one per side, but on opposite end faces. The locking between contact comb and plastic housing can be done, for example, in the form of a trailing clip or hole-pin connection.

In a further preferred embodiment, a hook is arranged above the earth contact and / or the fork contact, which latched to the plastic housing and thus prevents lifting of the contact comb when sliding the ground contact on a ground rail.

A preferred use of the invention is the surge protection for a connector according to the DE 10 2004 017 605 B3 ,

Fig. 1

eine perspektivische Darstellung eines Kunststoffgehäuses mit eingelegten 2-poligen Überspannungs-Gasableitern,

Fig. 2

eine perspektivische Darstellung eines Kontaktkamms,

Fig. 3

eine perspektivische Seitenansicht eines Überspannungsschutzmagazins,

Fig. 4

eine perspektivische Draufsicht auf das Überspannungsschutzmagazin,

Fig. 5

eine Seitenansicht des Überspannungsschutzmagazins,

Fig. 6

eine Draufsicht auf das Überspannungsschutzmagazin mit teilweise entferntem Kontaktkamm,

Fig. 7

einen Querschnitt durch das Überspannungsschutzmagazin und

Fig. 8

eine perspektivische Darstellung der als Kontaktgitter ausgebildeten elektrischen Kontakte.

The invention will be explained in more detail below with reference to a preferred embodiment. The figures show:

Fig. 1

a perspective view of a plastic housing with inserted 2-pin overvoltage gas discharge tubes,

Fig. 2

a perspective view of a contact comb,

Fig. 3

a perspective side view of an overvoltage protection magazine,

Fig. 4

a perspective top view of the overvoltage protection magazine,

Fig. 5

a side view of the overvoltage protection magazine,

Fig. 6

a plan view of the overvoltage protection magazine with partially removed contact comb,

Fig. 7

a cross section through the overvoltage protection magazine and

Fig. 8

a perspective view of the formed as a contact grid electrical contacts.

In the Fig. 1 is a plastic housing 10 with inserted 2-pin surge Gasableitern 11 shown. The plastic housing 10 has an upper side O, a lower side U and two end faces S. Furthermore, the plastic housing 10 has a left side Li and a right side Re, which extend to the left or right of a longitudinally extending L web 13, wherein the top of the web 13 is equal to the top O of the plastic body 10. The 2-pole overvoltage gas discharge tube 11 have substantially a cylindrical basic shape, wherein the Kontaktmetallisierungen are located on the bottom surfaces 36 of the cylinder, whereas the lateral surface except the edge portions 37 is isolated. The 2-pole overvoltage gas discharge tube 11 are arranged in receptacles 12, which are arranged in two rows left and right of the web 13 extending in the longitudinal direction L. The web 13 forms a wall and separates the left and right sides (Li, Re). The receptacles 12 have a circular cross-section. The individual receptacles 12 are divided by partitions 14, which are preferably flat. Above the receptacles 12 sliding elements 15 are arranged, which have a slope 16. In the slope 16 is in each case a hole 17. The actual receptacle 12 is open to the top of the sliding elements 15, wherein the opening angle is smaller than 90 °, so that the 2-pin overvoltage gas discharge tube 11 can not slip up. To load from above, these slip down the slope 16 and fall obliquely past the partitions 14 into the receptacles 12. The holes 17 are injection molding technical condition, since the Enveloping a contact grid 30 this must be held in position by pins. The images 12 of the left and right side (Li, Re) are arranged offset to each other, which is particularly good in Fig. 6 you can see. In each case an electrical contact 34 with a contact region 33 is arranged on a wall of the receptacles 12, which contacts the 2-pole overvoltage gas discharge tube 11, which will be explained in more detail below (see Fig. 8 ). Next, the plastic housing 10 has a latching hook 18 below the last sliding element 15.

The electrical contacts are used as contact grid 30 (see Fig. 8 ) miteingesitzt in the production of the plastic housing 10. The contact grid 30 comprises a number of receptacles 12 corresponding number of electrical contacts 34, which are initially connected by a transverse web 31 with each other. Each electrical contact 34 comprises a straight insertion region 32, which extends to the transverse web 31. The insertion areas 31 of all electrical contacts 34 are arranged in a row. From the transverse web 31, the electrical contacts are initially bent slightly and then pass again into a contact region 33, which is arranged parallel to the insertion region 31. The turn between adjacent electrical contacts is different. If the electrical contacts 34 are numbered consecutively, all straight numbers in each case have the same curvature and all odd numbers have the same curvature. When encapsulating with plastic then forms between adjacent contacts a plastic wall which separates the receptacles 12 of the left and right sides, the contact areas 33 remain unilaterally in the direction of the respective receptacle 12 and there contact the 2-pin overvoltage gas discharge 11. After encapsulation, the transverse web 31 is then punched away between two electrical contacts. For this purpose, the openings 19 in the plastic housing 10 are used.

In the Fig. 2 the contact comb 20 is shown, which is plugged from above on the stocked with 2-pin overvoltage gas discharge 11 plastic body 10. The contact comb 20 is substantially U-shaped, wherein on the two legs resilient contact elements 21 are arranged, which are formed by free cuts from the legs. In this case, the resilient contact elements 21 on the underside each have an inwardly directed turn 22, which produces the actual electrical contact to the 2-pole overvoltage gas discharge tube 11 (see also Fig. 7 ). Furthermore, the contact comb 20 has two locking tabs 23, which also each have a bend 24. The two locking tabs 23 are narrower than the resilient contact elements 21 and cooperate with the latching hooks 18. At the one end side of the contact comb 20, a ground contact 25 is arranged, which is preferably formed integrally from the contact comb 20. The ground contact 25 is also U-shaped, on whose two legs 27 each have a fork contact 28 is arranged. Above the fork contacts 28, a hook 29 is arranged in each case, the contact comb 20 and plastic housing 10 is locked together, so that the contact comb 20 is not lifted when pushed onto a grounding rail. When pushing the contact comb 20, the hooks 29 first run in grooves 35 on the front side S, and then subsequently hooked on the bottom U.

In the Fig. 3 to 5 then the complete overvoltage protection magazine 1 is shown, which arises after attaching the contact comb 20 to the assembled plastic body 10. You can see in Fig. 5 two pins 2, which serve to lock the surge protection magazine 1 with the bar or connectors for telecommunications and data technology.

In the Fig. 6 is shown how the contact region 33 of the electrical contacts 34 on the one hand embedded in the plastic and on the other hand protrudes with one side into the receptacle 12, there to contact the 2-pin surge gas arrester 11 from one side. The other contacting of the 2-pole overvoltage gas discharge 11 takes place by means of the bend 22 of the resilient contact element 21, as in Fig. 7 shown. There is also shown that the slope 16 and the adjoining approach or edge 3 with respect to the 2-pin surge gas arrester 11 protrudes, so that the bend 22 does not hit the edge region 37 of the 2-pin overvoltage gas discharge 11 but directly on the bottom surface 36.

LIST OF REFERENCE NUMBERS

1

Overvoltage protection magazine

2

spigot

3

edge

10

Plastic housing

11

2-pole surge gas arrester

12

Recordings

13

web

14

partitions

15

Sliding elements

16

slope

17

hole

18

latch hook

19

openings

20

Contact comb

21

resilient contact elements

22

turn

23

locking tabs

24

turn

25

ground contact

27

leg

28

fork contacts

29

hook

30

contact grid

31

crosspiece

32

insertion

33

contact area

34

electric contact

35

groove

36

floor area

37

border area

L

longitudinal direction

O

top

U

bottom

S

front

Li

left side

re

right side

Claims (14)

1. Overvoltage protection magazine (1), having a plastic housing (10), electrical contacts (34), overvoltage protection elements (11) and at least one contact comb (20), with the electrical contacts (34) being arranged in the plastic housing (10) and each having an insertion area (32) and a contact area (33), with the electrical contacts (34) being arranged in a row in the insertion area (32), with the plastic housing (10) having holders (12) for the overvoltage protection elements (11), with the contact areas (33) of the electrical contacts (34) projecting into the respective holder (12) and producing a first electrical contact with the respective overvoltage protection element (11), and with the contact comb (20) having sprung contact elements (21) in the area of the holders (12), which produce the second contact with the overvoltage protection element,
   characterized in that
   the holders (12) for the overvoltage protection elements (11) are arranged on both sides (left, right) along the longitudinal direction (L).
2. Overvoltage protection magazine according to Claim 1, characterized in that the contact comb (20) is U-shaped and has sprung contact elements (21) on each of its limbs.
3. Overvoltage protection magazine according to Claim 1 or 2, characterized in that the holders (12) for the overvoltage protection elements (11) are arranged offset with respect to one another on the two sides (left, right).
4. Overvoltage protection magazine according to Claim 1, 2 or 3, characterized in that the sprung contact elements (21) of the contact comb (20) are in the form of cuts.
5. Overvoltage protection magazine according to one of the preceding claims, characterized in that a ground contact (25) is arranged at at least one end of the contact comb (20).
6. Overvoltage protection magazine according to Claim 5, characterized in that the ground contact (25) is in the form of a double fork contact (28).
7. Overvoltage protection magazine according to one of the preceding claims, characterized in that the electrical contact (34) are in the form of contacts grids (30), which are stamped free through openings (19) in the plastic housing (10).
8. Overvoltage protection magazine according to Claim 7, characterized in that the holders (12) have a circular cross section.
9. Overvoltage protection magazine according to Claim 8, characterized in that the holder (12) is open to the upper face (O), with the opening angle being less than 180°.
10. Overvoltage protection magazine according to Claim 9, characterized in that the opening angle is less than 90°.
11. Overvoltage protection magazine according to one of the preceding claims, characterized in that sliding elements (15) which are formed with an incline (16) are arranged above the holders (12).
12. Overvoltage protection magazine according to Claim 11, characterized in that one edge (3) of the incline (16) projects beyond the overvoltage protection element (11).
13. Overvoltage protection magazine according to one of the preceding claims, characterized in that the contact comb (20) is formed with at least one locking lug (23).
14. Overvoltage protection magazine according to one of Claims 5 to 13, characterized in that a hook (29) is arranged above the ground contact (25) and/or above the fork contact (28).

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