CN215834748U - Circuit board contact element and assembly - Google Patents

Abstract

The utility model relates to a circuit board contact element for contacting conductors on a circuit board, comprising a contact body which is at least partially made of an electrically conductive material and has a head section for resting on a surface of the circuit board and at least two contact legs which are connected to the head section and which can be arranged in a circuit board opening in such a way that the contact legs project through the circuit board opening, wherein the head section has a conductor insertion opening through which a conductor to be connected can be inserted in a direction of insertion into a free space formed between the at least two contact legs, wherein the at least two contact legs can be moved away from one another by means of the conductor when the conductor is moved in the direction of insertion (E) into the free space and can be clamped in the circuit board opening in a force-fitting manner.

Description

Circuit board contact element and assembly

Technical Field

The utility model relates to a circuit board contact element for contacting conductors on a circuit board. The utility model also relates to an assembly having a circuit board and such a circuit board contact element.

Background

In order to connect the conductors to the printed circuit board, printed circuit board terminals are generally used, which have a housing with spring-loaded contact elements arranged therein, the conductors being introduced into the housing and being able to be clamped and contacted in the housing by means of the spring-loaded contact elements relative to the busbars. The bus bar is in turn connected to a solder foot which is guided to the outside of the housing. The housing of the circuit board terminal is placed on the circuit board and the solder feet can be brought into electrically conductive contact with the circuit board by means of a soldered connection.

SUMMERY OF THE UTILITY MODEL

The object of the utility model is to provide a circuit board contact element which enables simplified contacting of a conductor to a circuit board.

According to the utility model, this object is solved with the features of the independent claims. Advantageous embodiments and advantageous refinements of the utility model are specified in the dependent claims.

The circuit board contact element according to the utility model has a contact body which is at least partially made of an electrically conductive material and which has a head section for bearing on a surface of the circuit board and at least two contact legs which are connected to the head section and which can be arranged in such a way that the contact legs project through the circuit board hole, wherein the head section has a conductor insertion opening via which a conductor to be connected can be inserted in a direction of insertion into a free space formed between the at least two contact legs, wherein by means of the conductor the at least two contact legs can be moved away from one another and can be clamped in the circuit board hole in a force-fitting manner when the conductor is moved in the direction of insertion into the free space.

According to the utility model, it is now proposed that the circuit board contact element be arranged directly on the circuit board, so that the conductor to be connected can be brought into contact with the circuit board directly via the contact body of the circuit board contact element. The circuit board contact element preferably has no housing, so that the contact body itself can be arranged on the circuit board and the conductor to be connected no longer has to be first introduced into the housing. The circuit board contact element has a relatively simple structure with a contact body having a head section and preferably exactly two contact legs connected to the head section. The contact body can be inserted and held in a circuit board hole by means of contact legs, wherein both contact legs are inserted into one and the same circuit board hole. Furthermore, the contact legs also serve to clamp the conductor in the circuit board hole and thus to make an electrical connection. Due to the simple construction, the circuit board contact elements require very little construction space or space requirement. The clamping and contacting of the conductor with the circuit board is achieved only by introducing the conductor into the contact body, without additional tools. The conductor is introduced into the contact body through a conductor insertion opening on the head section of the contact body and, when moving in the insertion direction, reaches into the free space formed between the two contact legs. When introduced into this free space, the contact legs are moved away from one another only by the pressure of the conductor and thereby spread apart from one another not only inside the circuit board hole but also below the circuit board hole, viewed in the introduction direction. By spreading apart from one another, the contact legs and thus the contact bodies are clamped in the circuit board opening, so that the contact bodies are held in the circuit board opening in the connected state in a force-fitting manner. In the connected state, the conductor is therefore also arranged or introduced into the circuit board hole. By means of the force-fitting clamping of the contact legs against the walls of the circuit board holes, a sufficient electrical contact between the contact body and the circuit board is achieved without soldering. By the conductor being held in a clamping manner between the two contact legs in the contact or connection state, the connected conductor is also held in the contact body by the two contact legs in a force-fitting manner. The contact body is preferably composed entirely of an electrically conductive material, for example a metallic material. However, it is also possible for the contact legs of the contact body to be made of an electrically conductive material and for the head section to be made of an insulating material or to have a coating with an insulating material. By means of the circuit board contact element, a flexible conductor connection in terms of time and position on the circuit board can be achieved.

The contact body is preferably at least partially made of a spring-elastic material. In particular in the region of the contact legs, the contact body is preferably made of a spring-elastic material. When connecting the conductors, the contact body can act like an expansion screw, due to the spring-elastic material. Due to the elastic properties of the spring, the contact legs are deformed, in particular in their lower region, as viewed in the insertion direction, when the conductors are connected, in such a way that they can hook at the bottom side of the circuit board or engage behind the circuit board. The contact body is preferably formed at least in the region of the contact legs in such a way that it is plastically deformable when connecting the conductor, so that a reliable holding and contacting of the conductor on the circuit board can be formed.

The at least two contact legs are preferably shaped such that they each form a wedge shape in cross section. In particular, in the initial state, the two contact legs preferably have a wedge shape in cross section when no conductor has yet been connected. By means of the wedge shape, the contact legs can form a stop face in the initial state, against which the conductor strikes during the introduction and can thereby be moved away from each other or pushed away from each other by the conductor. In the connected state, the contact legs can hook or engage behind their wedge-shaped form with their regions projecting out of the circuit board holes on the bottom side of the circuit board.

In order to facilitate the mutual pushing apart of the contact legs when the conductor is introduced, the free space formed between at least two contact legs can have a cross section that tapers in the direction of introduction in the initial state. The free space can thus have an acute angle shape in cross section in the initial state. The two contact legs are preferably placed against each other in the initial state in such a way that they are shaped so as to converge towards each other. The contact legs can have stop surfaces at their lower ends in the insertion direction, with which the contact legs can abut against one another in the initial state. These stop surfaces are disengaged from each other and moved away from each other by the introduction of the conductor to be connected.

In order to improve the contact of the contact body with the circuit board and/or with the conductor, the at least two contact legs can have an embossed surface at least in regions. The stamped surface has a specific roughness, with which an improved friction and/or force fit can be produced between the circuit board and the contact leg of the contact body or between the contact leg of the contact body and the conductor.

In order to be able to improve the guidance of the conductor to be connected inside the contact body, two wall sections facing each other can be formed laterally of the at least two contact legs, which can form a lateral guidance of the conductor introduced into the free space between the two contact legs. The wall sections may laterally define a free space such that the free space may be defined by two contact legs and two wall sections. The two wall sections can extend transversely or perpendicularly to the two contact legs. The wall section may preferably extend from the head section of the contact body over the entire length of the contact leg. The wall section is preferably connected to the head section of the contact body like two contact legs. The wall section can likewise form a contact with the circuit board, since the wall section also projects through the circuit board opening. The two contact legs and the two wall sections can surround the connected conductor over its entire circumference by the contact body. The wall section prevents individual strands of the conductor from coming out laterally from the free space between the two contact legs, so that all strands of the conductor can remain between the two contact legs, whereby a reliable contact can also be ensured over a long period of time, since a so-called wandering of the conductor can thereby be prevented.

The contact body may be, for example, a stamped bent piece. The contact body can here be punched out of a metal strip or a sheet strip and bent into its shape.

Furthermore, the contact body can also be a turned part. The contact legs then have a rounded outer circumference with which they can rest against the wall of the circuit board opening. A recess can be milled or cut or drilled in the turned part, whereby two contact legs can be formed and by means of the recess a free space can be formed between the two contact legs.

In order to be able to achieve the most stable and reliable possible positioning of the circuit board contact elements on the circuit board, the head section is preferably designed to be plate-shaped. The head section can have a flat contact surface, with which the head section can be placed preferably flat on the surface of the circuit board. Tilting of the circuit board contact elements relative to the circuit board can thereby be prevented. The head section preferably extends transversely to the two contact legs.

The object is also achieved according to the utility model by means of an assembly having a circuit board with a circuit board hole and a circuit board contact element of the above-described configuration and improvement, wherein the head section of the contact body of the circuit board contact element rests on the surface of the circuit board and at least two contact legs of the contact body of the circuit board contact element project through the circuit board hole.

Drawings

The utility model is explained in detail below according to preferred embodiments with reference to the drawings.

In which is shown:

figure 1a shows a schematic view of a circuit board contact element according to the utility model,

figure 1b shows a schematic cross-sectional view along line a-a of the circuit board contact element shown in figure 1a,

figure 1c shows another schematic view of the circuit board contact element shown in figure 1a,

figure 1d shows a schematic view from below of the contact element of the circuit board shown in figure 1a,

figure 2a shows a schematic view of an assembly according to the utility model in an initial state of the contact elements of the circuit board,

figure 2b shows a schematic view of the assembly shown in figure 2a in a connected state of the conductors,

figure 3a shows a schematic view of another circuit board contact element according to the utility model,

figure 3b shows a schematic cross-sectional view of the circuit board contact element shown in figure 3a along the line a-a,

figure 3c shows a schematic view from below of the circuit board contact element shown in figure 3a,

figure 4a shows a schematic view of another circuit board contact element according to the utility model,

fig. 4b shows a schematic cross-sectional view of the circuit-board contact element shown in fig. 4a along the line a-a, an

Fig. 4c shows a schematic view from below of the circuit board contact element shown in fig. 4 a.

Detailed Description

Fig. 1a to 1d show a circuit board contact element 100. The circuit board contact element has a contact body 110, which is formed in one piece. The contact body 110 is made of an electrically conductive material, such as a metallic material.

Contact 110 has a head section 111. The head section 111 is flat or plate-shaped.

A conductor insertion opening 112 is formed on the head section 111, through which conductor insertion opening 112 a conductor 400 to be connected can be inserted into the contact body 110. A conductor lead-in opening 112 is formed in the middle of the width and length of the head section 111. The conductor lead-in openings 112 are configured as through holes.

Two contact legs 113a, 113b are connected to the head section 111. Starting from the head section 111, the two contact legs 113a, 113b extend in the direction of introduction E of the conductor 400 into the contact body 110. The two contact legs 113a, 113b are arranged opposite each other. The two contact legs 113a, 113b are configured mirror-symmetrically to one another about the longitudinal axis L of the contact body 110.

As can be seen in particular in fig. 1b, a free space 114 extends between the two contact legs 113a, 113b, into which free space the conductor 400 to be connected is introduced. The free space 114 is formed in alignment with the conductor insertion opening 112. In the initial state, when no conductor 400 has been introduced, as shown in fig. 1b, the free space 114 has a cross section that tapers in the introduction direction E. The free space 114 therefore has its largest width or its largest diameter directly adjacent to the conductor lead-in opening 112.

The acute cross-sectional shape of the free space 114 is given by the configuration of the contact legs 113a, 113 b. The contact legs 113a, 113b each have a wedge shape in cross section.

The contact legs 113a, 113b have an outer surface 115a, 115b, an inner surface 116a, 116b pointing in the direction of the free space 114, and an end surface 117a, 117b, respectively. The end faces 117a, 117b form the lower region of the contact legs 113a, 113b, viewed in the insertion direction E. In the initial state, the end faces 117a, 117b extend transversely to the introduction direction E. The contact legs 113a, 113b project with their end faces 117a, 117b out of the circuit board opening 210 of the circuit board 200. Contacts 110 bear with outer surfaces 115a, 115b against the walls of circuit board hole 210, as can be seen in fig. 2a and 2 b.

In the initial state as shown in fig. 1a to 1d, the two outer surfaces 115a, 115b of the two contact legs 113a, 113b extend parallel to each other. In contrast, the inner surfaces 116a, 116b of the two contact legs 113a, 113b are inclined to each other in the initial state. In particular, the inner surfaces 116a, 116b are arranged at an acute angle with respect to each other in the initial state. The inner surfaces 116a, 116b have, in their lower regions, viewed in the insertion direction E, stop surfaces 119a, 119b, respectively, which in the initial state abut against one another. These stop surfaces 119a, 119b can each form a clamping edge for the conductor 400 to be connected.

When the conductor 400 is introduced into the free space 114, as can be seen in fig. 2b, the contact legs 113a, 113b are deformed by pushing the contact legs 113a, 113b outwards transversely to the introduction direction E and thus away from each other. In the connected state of the conductor 400, the inner surfaces 116a, 116b may be positioned parallel to each other according to the diameter of the connected conductor 400. The outer surfaces 115a, 115b have, in the connected state, along their length in the introduction direction E, a bend 118a, 118b, as can be seen in fig. 2 b. By means of these bent portions 118a, 118b, the contact legs 113a, 113b can be hooked or engaged from behind on the bottom side 211 of the circuit board 200 in the connected state.

The contact body 110 is a stamped and bent part in the embodiment shown in fig. 1a to 1 d. The contact body 110 is stamped and bent from a metal strip. As can be seen in fig. 1b, contact body 110 is bent such that inner surfaces 116a, 116b of contact legs 113a, 113b are directly connected to head section 111. The end faces 117a, 117b are directly connected to the inner faces 116a, 116b, and the outer faces 115a, 115b of the contact legs 113a, 113b are directly connected to the end faces 117a, 117 b. The outer surfaces 115a, 115b of the contact legs 113a, 113b have no direct connection to the head section 111.

In the embodiment shown in fig. 1a to 1d, contact body 110 furthermore has two wall sections 120a, 120b arranged opposite one another. The wall sections 120a, 120b define a free space 114 between the two contact legs 113a, 113 b. The wall sections 120a, 120b, like the contact legs 113a, 113b, extend from the head section 111 in the introduction direction E. The wall sections 120a, 120b have the same length as the contact legs 113a, 113b and thus end at the end faces 117a, 117b of the contact legs 113a, 113 b. The wall sections 120a, 120b laterally overlap or cover the contact legs 113a, 113b along their length. The wall sections 120a, 120b serve as a guide aid for the conductor 400 to be introduced and connected. The wall sections 120a, 120bU are curved.

Fig. 2a and 2b show an assembly 300 with a circuit board 200 and a circuit board contact element 100 arranged on the circuit board 200, with the conductor 400 being connectable to the circuit board 200 via the circuit board contact element 100.

Circuit board contact element 100 is positioned on circuit board 200 such that head section 111 of contact 110 lies flat on surface 212 of circuit board 200. The surface 212 here constitutes the top side of the circuit board 200. Contact 110 with its contact legs 113a, 113b and wall sections 120a, 120b passes through exactly one circuit board hole 210.

The conductor 400 to be connected is introduced in the introduction direction E via the conductor introduction opening 112 on the head section 111 into the free space 114 between the two contact legs 113a, 113 b. In this case, the conductor 400 is pressed against the inner faces 116a, 116b of the contact legs 113a, 113b, as a result of which the contact legs 113a, 113b are moved outward transversely to the insertion direction E, as a result of which the contact legs 113a, 113b are clamped in a force-fitting manner on the circuit board 200. The inner faces 116a, 116b of the contact legs 113a, 113b are moved in the direction of the outer faces 115a, 115b of the contact legs 113a, 113b, so that in the connected state the inner faces 116a, 116b can lie flat against the outer faces 115a, 115b in the circuit board opening 210. Below the circuit board 200 and thus outside the circuit board holes 210, the inner surfaces 116a, 116b are spaced apart from the outer surfaces 115a, 115b even in the connected state. The outer surfaces 115a, 115b no longer extend linearly in the connected state, but rather have a fold 118a, 118b directly at the bottom side 211 of the circuit board 200, whereby the outer surfaces 116a, 116b extend obliquely to the introduction direction E and are no longer oriented parallel to the introduction direction E in the connected state in this region below the circuit board 200, as in the initial state, as can be seen in fig. 2a and 2 b.

In the connected state, the conductor 400 preferably lies flat against the inner faces 116a, 116b of the contact legs 113a, 113 b. If conductor 400 has a smaller conductor diameter, conductor 400 abuts inner surfaces 116a, 116b of contact legs 113a, 113b, at least in the region of stop surfaces 119a, 119 b. The conductor 400 is thus clamped conductively between the inner surfaces 116a, 116b of the contact legs 113a, 113 b.

In order to be able to achieve such a deformation of the contact legs 113a, 113b when connecting the conductor 400, the contact body 110 is made of a spring-elastic material.

Fig. 3a to 3c show a similar embodiment of the circuit board contact element 100 to that shown in fig. 1a to 1 d. The only difference is that the contact body 110 has no wall section, and the head section 111 has a circular outer circumference and no rectangular outer circumference, as in the embodiment shown in fig. 1a to 1 d.

Fig. 4a to 4c show a configuration in which the contact body 110 is a turned part. The outer surfaces 115a, 115b of the contact legs 113a, 113b thus have a rounded shape. In contrast, the outer surfaces 115a, 115b of the embodiments shown in fig. 1a to 1d and 3a to 3c have a rectangular design.

In the embodiment shown in fig. 4a to 4c, a free space 114 is cut or milled into the contact body 110. The head section 111 also has a circular outer circumference. The contact legs 113a, 113b are made of a solid material. Here, too, the contact legs 113a, 113b have a wedge shape in cross section. The free space 114 is tapered in the introduction direction E. The operating principle of the circuit board contact element 100 shown in fig. 4a to 4c therefore corresponds to the operating principle of the circuit board contact element 100 shown in fig. 1a to 1d and 3a to 3 c.

Description of the reference numerals

100 circuit board contact element

110 contact body

111 head section

112 conductor lead-in opening

113a, 113b contact leg

114 free space

115a, 115b outer surface

116a, 116b inner surface

117a, 117b end face

118a, 118b bent portions

119a, 119b stop surfaces

120a, 120b wall sections

200 circuit board

210 circuit board hole

211 bottom side

212 surface of

300 assembly

400 conductor

E direction of introduction

L longitudinal axis

Claims (10)

1. Circuit board contact element, the circuit board contact element (100) being used for contacting a conductor on a circuit board, the circuit board contact element having a contact body (110) which is at least partially made of an electrically conductive material and has a head section (111) for bearing on a surface (212) of a circuit board (200) and at least two contact legs (113a, 113b) which are connected to the head section (111) and which can be arranged in a circuit board hole (210) in such a way that they project through the circuit board hole (210), wherein the head section (111) has a conductor insertion opening (112) through which a conductor (400) to be connected can be inserted in a direction of insertion (E) into a free space (114) which is formed between the at least two contact legs (113a, 113b), wherein the at least two contact legs (113a, 113b), 113b) Can be moved away from one another by means of the conductors (400) when the conductors (400) are moved in the insertion direction (E) into the free space (114) and can be clamped in the circuit board hole (210) in a force-fitting manner.

2. Circuit-board contact element according to claim 1, characterized in that the contact body (110) is at least partially made of a spring-elastic material.

3. A circuit-board contact element according to claim 1 or 2, characterised in that the at least two contact legs (113a, 113b) each have a wedge shape in cross-section.

4. A circuit-board contact element according to claim 1, characterised in that in the initial state the free space (114) formed between the at least two contact legs (113a, 113b) has a cross section which tapers in the introduction direction (E).

5. A circuit-board contact element according to claim 1, characterised in that the at least two contact legs (113a, 113b) have at least partially an embossed surface.

6. The circuit board contact element according to claim 1, characterized in that two mutually opposite wall sections (120a, 120b) are formed laterally of the at least two contact legs (113a, 113b), which wall sections form a lateral guide for a conductor (400) introduced into the free space (114) between the two contact legs (113a, 113 b).

7. Circuit board contact element according to claim 1, characterised in that the contact body (110) is a stamped bent piece.

8. Circuit-board contact element according to claim 1, characterised in that the contact body (110) is a turned part.

9. Circuit-board contact element according to claim 1, characterised in that the head section (111) is configured plate-shaped.

10. Assembly, the assembly (300) comprising a circuit board (200) having a circuit board hole (210) and a circuit board contact element (100) constructed according to one of claims 1 to 9, wherein the head section (111) of the contact body (110) of the circuit board contact element (100) is placed on a surface (212) of the circuit board (200) and at least two contact legs (113a, 113b) of the contact body (110) of the circuit board contact element (100) protrude through the circuit board hole (210).

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