TWI707512B - Leiteranschlusskontaktelement (2) - Google Patents

Abstract

The present invention relates to a conductor joint contact element (1) with a sheet metal piece. The sheet metal piece has: two mutually opposite side walls (2a, 2b), a bottom (3) connecting the side walls (2a, 2b), and The cover part (4) facing the bottom part (3) and connected with the side walls (2a, 2b). The conductor introduction channel (7) is defined by the side walls (2a2b), the bottom (3) and the cover (4). The side walls (2a, 2b) are provided with spring tongues (8) detached from the bottom (3) and the cover (4), and the spring tongues form clamping positions for clamping the conductor. The cover (4) has material tongues (12, 23) detached from the side walls (2a, 2b). The material tongues (12, 23) extend at least to the clamping position above the plane formed by the spring tongues (8) facing the front edge (11) of the cover (4).

Description

Conductor joint contact element (2)

The present invention relates to a conductor joint contact element with a sheet metal piece. The sheet metal piece has two opposite side walls, a bottom connecting the side walls, and a cover facing the bottom and connecting the side walls. The side wall, the bottom and the cover define a conductor introduction channel. The side walls have spring tongues separated from the bottom and the cover, and the spring tongues form clamping positions for clamping the conductor.

DE 10 2013 111 649 A1 shows a box-shaped conductor connection clip integrally made of sheet metal parts, in which spring tongues facing each other are formed on two mutually opposed side walls. The conductor guide part inserted in the intermediate space between the spring tongues is connected to the cover part. The bottom is folded upward on the end of the bottom opposite to the conductor introduction channel, thereby forming an end baffle for the conductor to be clamped.

US 3,363,224 discloses a conductor joint contact element, which is also integrally formed of a sheet metal piece. Here, the side wall portions are bent out from the bottom, and the side wall portions respectively carry spring tongues directed toward each other. The side wall portions are bent toward each other in the upper region to form a cover portion, and the front edges of the side wall portions abut each other. In this way, a closed box-shaped conductor guide channel is formed, and the spring tongue is inserted into the conductor guide channel from the side.

A similar embodiment is disclosed in US 4,299,436 A. The side wall overlaps the spring tongue to form an overload baffle.

DE 197 35 835 B4 discloses an electrical clamp for clamping and connecting at least one electrical conductor, which has a contact frame stamped from a flat metal material and formed with a channel inlet and two channel side walls in a channel manner. The electrical conductor is inserted in the direction of the longitudinal axis of the channel via the channel inlet. In order to form a conductor clamping joint, in the entrance of the channel, the tongue-type leaf springs are punched out from the flat material of the side wall of the channel, and are bent outward from the plane of the flat material, that is, the free end of the leaf spring The part forms a clamping edge oriented toward the conductor. The channel cover has a cover opening on the leaf spring, and through the cover opening, the key can be pressed between the leaf springs from above.

Therefore, the object of the present invention is to realize a very tight and reliable conductor joint contact element.

This objective is achieved by a conductor joint contact element having the characteristics of claim 1. In the ancillary request item, a preferred implementation mode is described.

The present invention proposes that the cover of the conductor joint contact element has a material tongue detached from the side wall. The material tongue extends at least to the clamping position on the plane formed by the front edge of the spring tongue facing the cover. Thereby, the plane formed by the upper side of the material tongue pointing to the upper frontal edge of the spring tongue is located on the spring tongue at least in a stationary state, and does not extend between the spring tongues. This does not exclude that the operating part on the material tongue at least partially reaches between the operating parts protruding from the spring tongue. Thereby, the entire width of the spring tongue is provided for clamping the electrical conductor without being affected by the material tongue. The conductive body is guided through the material tongue at least to the clamping position in the upper region. In this way, in addition to the front part of the conductor introduction channel, through the bottom, the spring tongue and the material tongue connected to the cover, without further affecting the material tongue, the conductor guide is provided as closed as possible in a very tight structure. unit. The detached material tongue is different from the simple continuous cover, and the material tongue has the advantage that the material tongue has a free end and is thereby movable. Thereby, the gap between the spring tongue and the material tongue can be reduced.

In addition, the detached material tongue provides the optional possibility of operating the spring tongue to open the clamping position. When a force acting in the direction of the bottom is applied to the material tongue, the material tongue can cooperate with the spring tongue in an appropriate design to partially open the spring tongue.

In this regard, it is particularly advantageous that the material tongue has an operating part oriented to cooperate with the spring tongue to open the clamping position. Thereby, a special operating part is provided on the material tongue. The operating part matches the spring tongue in structure, so that when the force acts on the material tongue in the bottom direction, the operating part engages the spring tongue and turns the spring The tongue is partially open.

The cover may be composed of two layers of sheet metal parts that are overlapped. Here, the lower layer closest to the bottom may form a conductor guide wall that extends obliquely to the bottom and terminates before the clamping position formed by the spring tongue.

In this way, with these two layers, on the one hand, the conductor guide wall can provide conductor guidance, and on the other hand, the material tongue can provide operation possibilities.

Here, the material tongue may be formed on the upper layer away from the bottom. In addition, with the two-layer design of the cover, a very stable and compact implementation of the conductor joint contact element is realized.

In order to form the operating part, a material convex portion protruding laterally from the material tongue may be provided on the free end region of the material tongue opposite to the conductor introduction channel. With such a material protrusion protruding laterally from the material tongue, the width of the material protrusion required for operating the spring tongue can be increased in the area of the operating portion.

In order to operate symmetrically, the material protrusions extending in directions away from each other can be provided on the two opposite sides of the material tongue to form the operating part.

Here, the material protrusions do not need to extend on the plane, but can be bent. Here, the material convex portion may be bent upwards away from the bottom and inclined outwards here. Thereby, the point of action of the material protrusion on the spring tongue moves from the inner area of the material protrusion to the free end when the material tongue moves in the bottom direction. This makes it possible to obtain the best dynamics for operating the spring tongue.

The spring tongue may have operating tongues that protrude from the front edge adjacent to the cover. Here, the operating tongues are bent outward from the plane of the adjacent spring tongue portion, and are positioned below the operating portion of the material tongue. By operating the tongue, the material tongue achieves the best operability on the spring tongue. The operating part of the material tongue can slide along the operating tongue, and through the design of bending outwards, The more the material tongue goes between the spring tongues, the greater the degree of opening of the spring tongue.

The material tongue may have baffle tabs protruding laterally, and the baffle tabs are bent to extend toward the spring tongue. Through these baffle plates, the overload end baffle is provided. The movement of the material tongue in the direction of the bottom is only possible in the following range, that is, until the laterally protruding baffle tab touches the front edge of the spring tongue.

The material tongue can taper towards the free end. Thereby, the material tongue can enter between the spring tongues at least when the conductor has been clamped, and partially open the spring tongue to open the clamping position.

In the sheet metal part, the part opposite to the conductor introduction channel may have a side wall part turned over from the bottom and an end leaning part extending across the side wall part. In this way, a conductor receiving portion restricted by the bottom portion, the side wall portion, and the end leaning portion is formed.

Here, the end leaning portion may be formed by a region where the side wall portions are bent toward each other. Therefore, the conductor receiving portion may have a curved wall area. This makes it possible to obtain a material-saving and compact implementation.

In addition, the bottom may have a detached welding contact joint. In the solder connection type, the free end of the bottom, for example for surface mount (SMD), can be soldered to the circuit board. The welding part is preferably located in the area of the end baffle part and is separated from the end baffle part while leaving a free space. Here, when the conductor joint contact element is soldered, the intermediate space between the bottom portion and the side wall portion and the end leaning portion can be closed with a soldering material.

FIG. 1 shows a perspective view of a first embodiment of the conductor terminal contact element 1. The conductor joint contact element is integrally formed by a single sheet metal piece. The sheet metal part is punched or cut into several partial areas and deformed. The sheet metal piece has two mutually opposed side walls 2a, 2b and a bottom 3 connecting the side walls 2a, 2b. The cover 4 is opposite to the bottom 3, and the cover also extends across the side walls 2a and 2b, and is connected to the side walls in the state of closing the transition part.

In the embodiment shown above, the cover 4 is formed in two layers: the lower layer 5 separated from the left side wall 2a and the upper layer 6 bent from the right side wall 2b. The lower layer 5 is closest to the bottom 3 compared to the upper layer 6.

By the mutually spaced side walls 2a and 2b and the mutually spaced bottom and cover parts 3, 4 that extend from the side walls, a conductor introduction channel 7 can be formed, and the conductor introduction channel is configured to introduce the conductor.

The spring tongues 8 are separated from the side walls 2a, 2b in the conductor insertion direction L, that is, in the extension direction of the bottom 3, respectively. The spring tongues 8 are arranged in a state of "inclined to the center axis of the conductor joint contact element 1 pointing to each other", and the free clamping ends 9 arranged further inwardly inclined form a clamping position for clamping Electrical conductors inserted into the spring tongues 8 facing each other.

The lower layer 5 forms a conductor guide wall 10 extending obliquely to the bottom 3 by extending along the spring tongue 8, and the conductor guide wall is located on a plane formed by the spring tongue 8 facing the front edge 11 of the cover 4, And therefore, it does not extend between the spring tongues 8 facing each other. Thereby, the conductor guide wall 10 and the spring tongue 8 do not overlap. Thereby, the spring tongues 8 can be squeezed toward each other without hindrance.

The upper layer 6 of the cover 4 has a material tongue 12 detached from the side walls 2a, 2b. The material tongue 12 extends in the direction of the spring tongue 8 in the conductor insertion direction L. The material tongue 12 is also located on the plane formed by the front edge 11 of the spring tongue 8 facing the cover 4.

On the clamping ends 9 of the spring tongues 8, operating tongues 13 are respectively provided, and the operating tongues point upward toward the plane direction of the cover 4 and away from each other and outward. The material tongue 12 has an operating portion 14 on the freely movable end of the material tongue. The operating portion 14 has two material tongues 15 a, 15 b, which extend outwardly and upwardly away from the bottom 3 from opposite sides of the material tongue 12. The material tongue forms a curved surface which contacts the operating tongue 13 of the spring tongue 8. When the operating force now acting in the direction of the bottom 3 is applied to the material tongue 12, the operating portion 14 is guided between the operating tongues 13. Thereby, the opposite spring tongues 8 move away from each other.

Viewed from the conductor insertion direction L, the overload baffle is arranged on the material tongue 12 in a manner before the operating part 14, and the overload baffle is formed by a guide tab 16 protruding laterally from the material tongue 12. In the illustrated embodiment, the guide tabs 16 are slightly bent from the following plane of the material tongue 12 downward toward the bottom 3 direction, and the part connecting the opposite guide tabs 16 is located in this plane. Of course, other aspects can also be selected. With the guide tabs 16, the turning of the material tongue 12 toward the bottom 3 is restricted until the guide tab 16 rests on the front edge 11 of the spring tongue 8.

In the sheet metal piece or the conductor joint contact element 1, a portion opposite to the conductor introduction channel 7 has a conductor receiving portion 17. The conductor receiving portion is composed of two mutually opposed side wall portions 18a, 18b and an end baffle portion 19 extending from the side wall portions 18a, 18b. The side wall portions 18a and 18b are bent upward from the bottom 3 toward the plane direction of the cover 4. The wall portions respectively directed toward each other are connected to the side wall portions 18a, 18b, and the wall portions form an end baffle portion 19 with the gap 20 selectively remaining.

In addition, it can be seen that a welded contact joint 21 is formed under the end baffle part 19 for surface sticking installation on the free end of the bottom 3. The welded contact joint is detached and accessible by the upwardly bent side wall portions 18a, 18b and the end baffle portion 19.

This point is more obvious in conjunction with Figure 2, which shows a perspective view of the back side of the conductor joint contact element 1 in Figure 1. It can be seen here that the welded contact joint 21 is formed by the tapered free end of the bottom 3. The walls that are bent toward each other from the side wall portions 18a, 18b to form the end baffle portion 19 are bent here, and are separated from the welded contact joint 21 while leaving free space. Thereby, the solder contact portion 21 has good accessibility, and makes it possible to simply operate and solder the conductor joint contact element 1 on the circuit board. During welding, the free space between the welding contact joint 21 and the end baffle plate portion 19 can also be closed with welding materials as appropriate.

In addition, the bottom 3 can also be used as a soldering surface in the area of the conductor guide 7 with the side walls 2a, 2b, because this part is also flat against the circuit board.

In addition, it is obvious that the freely movable ends of the spring tongue 8 facing the side walls 2a, 2b have mutually facing, rolled or curved clamping portions 9 which have upward and inclined directions from the bottom 3 Outwardly directed operating tongue 13. The operating part 14 rests on the operating tongues 13 and is obviously curved.

Fig. 3 shows a side view of the conductor joint contact element 1 in Fig. 2. It is obvious therein that the cover 4 has a material tongue 12 detached from the side walls 2a, 2b, which is located above the plane formed by the front edges 11 of the spring tongues 8 facing each other. When the front edge 11 is viewed in this way, the operating tongue 13 is in a disengaged state and has nothing to do with it. The operating tongue is regarded as a separate part 13 on the spring tongue 8.

It is also obvious that the conductor guide wall 10 protruding obliquely downward from the plane of the cover 4 from the lower layer 5 toward the bottom 3 ends on the plane formed by the front edge 11 of the spring tongue 8. A funnel-shaped conductor guide area is realized through the area of the oblique conductor guide wall and the bottom 3 that extends obliquely upward toward the plane of the cover 4 and the spring tongues 8 obliquely close to each other. The conductor guide area is adjacent to the conductor Introduce the entrance side part of the channel 7.

This is also more obvious through FIG. 4, which shows a side cross-sectional view of the conductor joint contact element 1 in FIG. It can be seen here that the bottom 3 also extends slightly obliquely toward the plane of the cover 4 from the entrance side portion of the conductor introduction channel 7. It is also obvious here that the conductor guide wall 10 protruding from the lower layer 5 of the cover 4 terminates above the front edge 11 of the spring tongue 8 and thereby does not overlap the spring tongue 8.

It is also obvious that the two-layer structure of the cover 4 has a lower layer 5 closest to the bottom 3 and an upper layer 6 located on the lower layer and far from the bottom 3. Here, as viewed from the bottom 3, the material tongue 12 extends above the conductor guide wall 10 so that the conductor guide wall 10 is closer to the bottom 3 than the material tongue 12.

Through the two-layer structure of the cover 4, two different functions can be very closely unified in the stable conductor joint contact element 1. These functions are, on the one hand, the operating function realized by the material tongue 12, and on the other hand, the conductor guiding function realized by the conductor guiding wall 10.

FIG. 5 illustrates a second embodiment of the conductor joint contact element 1. The conductor joint contact element is much simpler than the first embodiment. The conductor joint contact element 1 is also formed by a single sheet metal part through stamping or area cutting and deformation such as folding. The entrance side portion of the conductor introduction channel 7 is also restricted by the side walls 2 a and 2 b protruding from the bottom 3 and the cover 4 extending between the side walls 2 a and 2 b and spaced from the bottom 3. The connection of the side walls 2a, 2b is also understood to mean at least one bridge of the space between the side walls 2a, 2b. It does not depend on the connection of form correspondence, force correspondence or material correspondence.

In the embodiment shown above, the cover 4 is simply placed on the front edge 22 of the end side of the right side wall 2b.

In this embodiment, the cover 4 also has a material tongue 23 detached from the side wall at least in the area of the spring tongue 8 of the side wall 2a, 2b. The material tongue is also located on the plane formed by the front edge 11 of the spring tongue 8 facing the cover 4. That is, the lower side of the material tongue 23 is formed on a plane above the spring tongue 8. Thereby, the material tongue 23 does not extend into the intermediate space of the spring tongue 8.

This is more apparent in Figure 6, which shows a perspective view of the back side of the conductor joint contact element 1 in Figure 5. It is obvious here that there is a gap 24 between the material tongue 23 and the spring tongue 8.

It is also obvious in this figure that the material tongue 23 extends conically towards the freely movable end.

In this embodiment, the freely movable ends of the spring tongue 8 are also further bent toward each other to achieve clamping and contacting the end 9 to form a clamping position for clamping the conductor.

When the conductor is clamped, the spring tongue 8 is separated. In this state, when an operating force is applied to the bottom 3 direction, the tapered end of the material tongue 23 can move between the spring tongues 8. In this way, the clamping position can be further opened, and the clamped conductor can be removed. This is of course only a selective implementation aspect.

In this embodiment, the material tongue 23 is provided mainly for guiding the conductor toward the clamping position. In this regard, the material tongue 23 extends at least to a clamping position formed by the clamping ends 9 of the spring tongue 8 that are bent toward each other.

A conductor receiving portion 17 is formed on the end of the conductor terminal contact element 1 facing the conductor introduction channel 7 on the entrance side. In this regard, the side wall portions 18 a and 18 b are folded (curved) upward from the bottom 3 toward the plane direction of the cover 4. The other wall portion is bent to extend from the left side wall portion 18a to the side wall portions 18a, 18b, thereby forming an end baffle portion 19. The end baffle portion terminates in front of the right side wall portion 18b with the front edge of the end baffle portion.

Through the upwardly bent side wall portions 18a, 18b and the end baffle plate portion 19, a welded contact joint 21 is formed on the free end area of the bottom 3. The conductor joint contact element 1 can be welded to the circuit board on the welding contact joint in this way.

Fig. 7 shows a side view of the conductor joint contact element 1 in Fig. 6. It is also obvious here that the material tongue 23, in the static state shown, has its entire length positioned above the spring tongue 8 so as not to overlap the spring tongue 8. It is also obvious that the material tongue 23 is slightly bent in the direction of the bottom 3. This becomes a funnel-shaped part for guiding the conductor introduced into the conductor introduction channel 7 to the clamping position.

It can also be seen that the material tongue 23 terminates in the region of the clamping position formed by the clamping end 9 with the freely movable end of the material tongue.

Fig. 8 shows a side cross-sectional view of the conductor terminal contact element 1 in Fig. 7. It is also obvious here that the material tongue 23 lies above the spring tongue 8 with the entire length of the material tongue. The end of the conductor guided into the conductor introduction channel 7 in the conductor insertion direction L from the right and guided toward the clamping position formed by the clamping end 9 is housed in the conductor accommodating section 17. The insertion path of such a conductor is restricted by the end baffle part 19, which intercepts from the side wall part 18b to the opposite side wall part 18a and is thereby bent in the conductor insertion direction L. Obviously, the end baffle plate portion 19 is spaced apart from the welding contact joint 21, which is arranged on the end region of the bottom 3 facing the conductor introduction channel 7 on the inlet side.

In the embodiment shown here, the bottom 3 is flat. However, the bottom may also be inclined toward the cover 4 in a partial area, thereby forming a conductor guiding funnel. Please refer to the first implementation aspect for the mutual relationship.

In this regard, the contour of the bottom 3 proposed in the first embodiment can also be used in the second embodiment.

It is also obvious in this view that the flat bottom 3 can also be used as a welding surface over the entire longitudinal extension of the bottom, thereby improving the mechanical fixation in particular.

1‧‧‧Conductor connector contact element 2a, 2b‧‧‧ side wall 3‧‧‧Bottom 4‧‧‧Cover 5‧‧‧Lower 6‧‧‧Upper floor 7‧‧‧Conductor introduction channel, conductor guide part 8‧‧‧Spring tongue 9‧‧‧Clamping end, clamping part, clamping contact end 10‧‧‧Conductor guide wall 11‧‧‧Front edge 12‧‧‧Material tongue 13‧‧‧Operation tongue, parts 14‧‧‧Operation part 15a, 15b‧‧‧Material tongue 16‧‧‧Guide splice, baffle splice 17‧‧‧Conductor storage section 18a, 18b‧‧‧Part of the side wall 19‧‧‧End baffle part 20‧‧‧Gap 21‧‧‧Welding contact connector 22‧‧‧Front edge 23‧‧‧Material tongue 24‧‧‧Gap L Conductor insertion direction

Hereinafter, the present invention will be further described in conjunction with the embodiments and the accompanying drawings. In the scheme:

Figure 1 illustrates a perspective view of a first embodiment of a conductor joint contact element;

Figure 2 shows a perspective view of the back side of the conductor joint contact element in Figure 1;

Figure 3 illustrates a side view of the conductor joint contact element in Figure 2;

Figure 4 illustrates a side sectional view of the conductor joint contact element in Figure 3;

Figure 5 illustrates a perspective view of a second embodiment of the conductor joint contact element;

Figure 6 shows a perspective view of the other side of the conductor joint contact element in Figure 5;

Figure 7 shows a side view of the conductor joint contact element in Figure 6;

Fig. 8 shows a side sectional view of the conductor joint contact element in Fig. 7;

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1‧‧‧Conductor connector contact element

2a, 2b‧‧‧ side wall

3‧‧‧Bottom

4‧‧‧Cover

5‧‧‧Lower

6‧‧‧Upper floor

7‧‧‧Conductor introduction channel, conductor guide part

8‧‧‧Spring tongue

9‧‧‧Clamping end, clamping part, clamping contact end

10‧‧‧Conductor guide wall

11‧‧‧Front edge

12‧‧‧Material tongue

13‧‧‧Operation tongue, parts

14‧‧‧Operation part

15a, 15b‧‧‧Material tongue

16‧‧‧Guide Splice

17‧‧‧Conductor storage section

18a, 18b‧‧‧Side wall part

19‧‧‧End baffle part

20‧‧‧Gap

21‧‧‧Welding contact connector

L‧‧‧Conductor insertion direction

Claims (12)

A conductor joint contact element (1) with an integrally formed sheet metal piece, the sheet metal piece having: two mutually opposed side walls (2a, 2b), and a bottom (3) connecting the side walls (2a, 2b) And a cover (4) facing the bottom (3) and connected to the side walls (2a, 2b), the side walls, the bottom and the cover defining a conductor introduction channel (7), wherein the The side walls (2a, 2b) have spring tongues (8) detached from the bottom (3) and the cover (4), and the spring tongues form a clamping position for clamping an electrical conductor, wherein, A material tongue (12, 23) detached from the side walls (2a, 2b) is connected to the cover (4), and the material tongue (12, 23) faces the spring tongue (8) The cover (4) extends above the plane formed by the front edge (11) to at least the clamping position, and is characterized in that: the cover (4) is composed of two overlapping layers (5) of the sheet metal part. , 6) constituted. The conductor joint contact element (1) according to claim 1, wherein the material tongue (12) has an operating portion (14) that is oriented to cooperate with the spring tongues (8) to Open the clamping position. The conductor joint contact element (1) according to claim 1 or 2, wherein the lower layer (5) nearest to the bottom (3) forms a conductor guide wall (10) extending obliquely to the bottom (3), and It ends before the clamping position formed by the spring tongue (8). The conductor joint contact element (1) according to claim 3, wherein the material tongue (12) is formed on the upper layer (6) away from the bottom (3). The conductor joint contact element (1) according to claim 1 or 2, wherein, in order to form the operating part (14), the free movement of the material tongue (12) facing the conductor introduction channel (7) A material protrusion (15a, 15b) protruding laterally from the material tongue (12) is arranged on the end area of the material. The conductor joint contact element (1) according to claim 5, wherein two material protrusions (15a, 15b) extending in directions away from each other are provided on opposite sides of the material tongue (12) ), and then form the operating part (14). The conductor joint contact element (1) according to claim 1 or 2, wherein the spring tongues (8) have operating tongues (13), and the operating tongues extend from the one adjacent to the cover (4) The front edge (11) protrudes, wherein the operating tongues (13) are bent outward from the plane of the adjacent spring tongue portion, and are positioned on the operating portion (14) of the material tongue (12) under. The conductor joint contact element (1) according to claim 1 or 2, wherein the material tongue (12) has a baffle tab (16) protruding laterally. Conductor connector contact element as described in claim 1 or 2 (1), wherein the material tongue (12, 23) becomes thinner toward the free end. The conductor joint contact element (1) according to claim 1 or 2, wherein the portion of the sheet metal member opposite to the conductor introduction channel (7) has a side wall portion (18a, 18a, 18b) and an end baffle plate portion (19) extending transversely to the side wall portions (18a, 18b). The conductor joint contact element (1) according to claim 10, wherein the side wall portions (18a, 18b) are bent in an opposite manner to form the end baffle portion (19). The conductor joint contact element (1) according to claim 1 or 2, wherein a free end of the bottom (3) is detached to form a welding contact joint (21).

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