DE102019132007A1 - Terminal as well as electronic device - Google Patents

Abstract

The invention relates to an electrical connection terminal (100) for connecting an electrical conductor, with a housing (110), with a clamping spring (120) arranged in the housing (110), with a current bar (160) and with a clamping lever (140) , wherein the clamping spring (120) has a contact leg (121) in order to tension an electrical conductor to be connected in a resiliently elastic manner against the current bar (160), the clamping lever (140) being fastened to the housing (110), the clamping lever (140 ) is pivotable about a pivot axis (141) between an open position and a closed position, the contact leg (121) having a through opening (123) with a support section (111) which penetrates and attaches to the through opening (123) of the contact leg (121) a retaining leg (124) of the clamping spring (120) rests.

Description

The present invention relates to a connecting terminal for connecting an electrical conductor. The invention also relates to an electronic device with at least one such connection terminal.

Connection terminals for electrical conductors are used to releasably contact electrical conductors.

The object of the present invention is to specify an improved connection terminal for connecting an electrical conductor.

The object is achieved according to the invention with the features of the independent claims. Appropriate refinements and advantageous developments of the invention are specified in the subclaims.

The connection terminal according to the invention has a housing, a clamping spring arranged in the housing, a current bar and a clamping lever, the clamping spring having a contact leg in order to elastically tension an electrical conductor to be connected against the current bar, the clamping lever being fastened to the housing The clamping lever can be pivoted about a pivot axis between an open position and a closed position, the contact leg having a through opening with a support section which penetrates the through opening of the contact leg and rests on a retaining leg of the clamping spring.

The support portion serves to prevent bending or deformation of the clamping spring due to improper use, for example when a tool such as a screwdriver is inserted into the connection terminal.

In particular, the support section can be formed on the housing. The support section also serves to guide and position the clamping spring relative to the housing. Accordingly, the clamping spring with the through opening can be pushed onto the support section, so that the clamping spring can be positively positioned with the contact leg on the housing.

It can be provided that an end section of the support section resting against the retaining leg of the clamping spring has a curvature or rounding in order to at least partially adapt the shape of the support section to the different bending radii of the clamping spring for different tensioning states. The curvature or rounding can reduce wear on the spring compared to a sharp-edged support and also reduce the friction when the spring is deformed in contact with the support section. The tensioning mechanism formed from the clamping lever, the clamping spring and the associated support section can accordingly be more smooth-running compared to sharp-edged or planar support solutions by providing the end-side curvature or rounding of the support section.

The clamping spring can be enclosed on two sides by the housing, so that in particular no lateral opening of the housing is provided for mounting the clamping spring and the clamping spring can be mounted in the housing by being pushed onto the support section and then pushed in between two side housing walls of the housing.

According to an alternative embodiment, the support section can be provided on the current bar or be part of the current bar.

It can further be provided that the clamping lever has a driver and that the driver is assigned a tab of the clamping spring which is provided on the contact leg of the clamping spring. Because the tab that interacts with the driver is provided on the contact leg of the clamping spring, a particularly compact and robust design of the clamping spring can be provided within the connecting terminal.

It is also possible that the tab is formed in one piece with the clamping spring and is punched out of the contact leg of the clamping spring, wherein the through opening can essentially correspond to the dimensions of the punched-out tab. In this way, the tab can be provided inexpensively and reliably as an integral part of the clamping spring.

It can be provided that the tab is arranged freely cantilevered between the contact leg and the retaining leg of the clamping spring, wherein the contact leg and the retaining leg can be connected to one another by a curved connecting section. Consequently, the tab can be integrated as compactly as possible into an installation space provided for receiving the clamping spring.

The connecting section between the contact limb and the holding limb can be an arc which defines an angle of less than 90 ° between the holding limb and the contact limb. Accordingly, sections of the contact leg and of the retaining leg adjacent to the arch can enclose an angle which is smaller than 90 °.

It can further be provided that the driver is at a distance from the tab when the clamping lever is in the closed position, and that the driver rests against the tab when the clamping lever is in the open position. In the closed position, it can be ensured in this way that the entire spring force of the spring clamp is available for tensioning a conductor in the direction of the current bar, and that part of the spring force is not lost due to contact with the driver. Accordingly, starting from the closed position of the clamping lever, the driver can initially exert an idle stroke until the driver comes into contact with the tab, the subsequent further opening movement causing the clamping spring to deform via the tab and the driver.

The driver can be, for example, a mandrel or web which protrudes along the width direction of the clamping spring and is formed on the clamping lever.

In particular, it can be provided that pivoting the clamping lever from the closed position into the open position can increase a distance between the current bar and the contact leg, wherein the spring can be tensioned between the driver and a stop.

It can further be provided that a further clamping spring with a further clamping lever is provided in order to clamp a further electrical conductor to be connected in a resiliently elastic manner against the current bar.

In particular, the further clamping spring and the further clamping lever can be designed analogously to the clamping lever described above and the clamping spring described above.

In particular, the connection terminal is constructed mirror-symmetrically, allowing two conductors to be connected to be introduced into the connection terminal on both sides in order to enable an electrically conductive connection of the conductors to be connected.

In order to achieve a compact design of the connection terminal, it can be provided that the clamping springs have end sections that rest against one another, the clamping spring, as far as the clamping lever is in the open position, being tensioned between the driver and the end section of the further spring and the further spring as far as the further clamping lever is in the open position is clamped between the end section of the clamping spring and a driver of the further clamping lever.

The clamping springs can then be mutually supported against one another within the connection terminal, so that compact integration of the clamping springs into the housing of the connection terminal is made possible.

It can further be provided that the clamping levers assigned to the clamping springs also rest against one another in their open position in order to limit a pivoting path of the respective clamping lever in the open position.

In order to enable a simple and inexpensive construction of the clamping spring, it can further be provided that the clamping spring is a multiple curved band, in particular a spring steel band, wherein the band can have a constant width. When it is said in the present case that the band has a constant width, this means that the total width of the unwound band, which rests on a flat surface and from which the spring is formed, has a constant width. It goes without saying that, for example, punching out the flap has the effect that the flap itself has a smaller width than the original band. Nevertheless, the total width of the clamping section from which the tab is punched out remains the same and continues to correspond to the width of the retaining leg. In particular, the width of a section of the clamping leg resting against a conductor to be connected corresponds to the width of the holding leg.

In order to specify a defined position of the contact leg, it can be provided that the current bar has a shoulder on which the contact leg rests, provided that the clamping lever is arranged in the closed position and no conductor is inserted into the housing in the area of the clamping lever. Because the clamping lever rests on the current bar in the closed position, conductors of different diameters can be inserted between the contact leg and the current bar, the contact leg being moved or displaced away from the current bar by the conductor end by the diameter of the conductor end and thus the conductor end is tensioned by the contact leg on the current bar.

The opening between the current bar and the contact leg, which is limited to accommodate the conductor, can accordingly automatically adapt to the diameter of the conductor to be contacted in each case. In this way, a conductor can be contacted with the current bar and fastened in the connection terminal without the clamping lever being removed from it The closed position must be moved to the open position.

Alternatively, it is possible to move the clamping lever into its open position in order to lift the contact leg from the current bar and thus to facilitate the insertion of a conductor end. In this way, a conductor can first be inserted into the housing without having to displace the clamping leg with the end of the lyre. In this way, deformation of the conductor end when it is inserted into the connection terminal can be avoided. A subsequent pivoting of the clamping lever from its open position into the closed position causes the contact spring to be braced in the direction of the current bar, the conductor end being braced between the clamping leg of the clamping spring and the current bar.

It can be provided that the housing has a plastic or consists of a plastic.

It can further be provided that the clamping lever has a handle in order to enable the connection terminal to be actuated without tools and accordingly to enable electrical conductors to be connected and disconnected from the connection terminal without tools.

It is also possible for the housing to have a stop assigned to the clamping lever in order to limit a pivoting path of the clamping lever.

The connection terminal can be designed, for example, as a series terminal, block terminal or potential terminal.

The object according to the invention is also achieved with an electronic device which can have at least one connection terminal which has been developed and further developed as described above.

• 1A eine erfindungsgemäße Anschlussklemme in einer perspektivischen Ansicht von oben;
• 1B die Anschlussklemme aus 1A in einer Seitenansicht in einem Längsschnitt;
• 1C ein Teil des Gehäuses der Anschlussklemme in einer perspektivischen Ansicht von oben;
• 1D die Anschlussklemme aus 1A in einer Seitenansicht;
• 2 eine Klemmfeder in einer perspektivischen Ansicht von oben;
• 3 einen Klemmkörper in einer perspektivischen Ansicht von oben;
• 4 die Anschlussklemme aus 1A in einer Seitenansicht in einem Längsschnitt mit anzuklemmenden Leitern und Klemmkörpern in der Schließstellung;
• 5A die Anschlussklemme aus 1A in einer Seitenansicht in einem Längsschnitt mit anzuklemmenden Leitern und Klemmkörpern in der Offenstellung;
• 5B die Anschlussklemme aus 1A in einer Seitenansicht in einem Längsschnitt mit anzuklemmenden Leitern und Klemmkörpern in der Schließstellung;
• 6 die Klemmkörper, die Klemmfedern und der Strombalken der Anschlussklemme in einer Seitenansicht in einem Längsschnitt.

The invention is explained in more detail below with reference to the attached drawings using exemplary embodiments. They each show schematically:

• 1A a connection terminal according to the invention in a perspective view from above;
• 1B the connection terminal off 1A in a side view in a longitudinal section;
• 1C a part of the housing of the connection terminal in a perspective view from above;
• 1D the connection terminal off 1A in a side view;
• 2 a clamping spring in a perspective view from above;
• 3rd a clamp body in a perspective view from above;
• 4th the connection terminal off 1A in a side view in a longitudinal section with conductors and clamping bodies to be clamped in the closed position;
• 5A the connection terminal off 1A in a side view in a longitudinal section with conductors to be clamped and clamping bodies in the open position;
• 5B the connection terminal off 1A in a side view in a longitudinal section with conductors and clamping bodies to be clamped in the closed position;
• 6th the clamping body, the clamping springs and the current bar of the connection terminal in a side view in a longitudinal section.

A connector 100 has a housing for connecting an electrical conductor 110 . In the case 110 are a spring clip 120 and another spring clip 130 arranged. The connection terminal 100 has a clamping lever 140 which one of the clamping spring 120 assigned. The connection terminal 100 has another clamping lever 150 which of the other clamping springs 130 assigned. The connection terminal 100 has a current bar 160 .

The clamping spring 120 has a contact leg 121 to a connected electrical conductor resiliently elastic against the current bar 160 to brace. The other clamping spring 130 has a contact leg 131 to a connected electrical conductor resiliently elastic against the current bar 160 to brace.

The clamping lever 140 is on the housing 110 attached, the clamping lever 140 between an open position and a closed position about a pivot axis 141 is pivotable. The clamping lever 140 has a driver 142 on. The driver 142 is a tab 122 the clamping spring 120 assigned. The tab 122 is on the contact leg 121 the clamping spring 120 intended.

The other clamping lever 150 is on the housing 110 attached, the further clamping lever 150 between an open position and a closed position about a pivot axis 151 is pivotable. The other clamping lever 150 has a driver 152 on. The driver 152 is a tab 132 the other clamping spring 130 assigned. The tab 132 is on the contact leg 131 the other clamping spring 130 intended.

The connection terminal 100 is mirror-symmetrical, with the geometry of the clamping spring 120 the geometry of the clamping spring 130 corresponds to. The geometry of the clamping lever corresponds in the same way 140 the geometry of the further clamping lever 150 . The following is the geometry of the clamp springs 120 , 130 using the clamp spring as an example 120 In reference to 2 described. Next is the geometry of the clamping lever 140 , 150 using the clamping lever as an example 140 In reference to 3rd described.

2 shows the clamping spring 120 by itself in a perspective view from above. The tab 122 is integral with the clamping spring 120 formed and from the contact leg 121 the clamping spring 120 been punched out. The contact leg 121 has one of the dimensions of the punched flap 122 corresponding passage opening 123 on.

The tab 122 is freely cantilevered between the contact leg 121 and a retaining leg 124 the clamping spring 120 arranged. The contact leg 121 and the retaining leg 124 are through a curved connecting section 125 connected with each other.

The passage opening 123 serves to position the clamping spring 120 on the housing 110 . So shows the case 110 a support section 111 on which the through opening 123 of the contact leg 121 penetrates and on the retaining leg 124 the clamping spring 120 is applied. The clamping spring 120 is a multi-curved band, the band having a constant width B1 having.

Likewise, the housing 110 a support section 112 on, the one through opening 133 the clamping spring 130 penetrates and on a retaining leg 134 the clamping spring 130 is applied. The clamping spring 130 is a multi-curved band, the band having a constant width.

Accordingly, the respective clamping spring 120 , 130 with their through-opening on the associated support section 111 , 112 be pushed on, so that the respective clamping spring 120 , 130 with her contact leg 121 , 131 form-fitting on the housing 110 is positioned.

The support sections 111 , 112 of the housing 110 have a curvature or rounding at the end 115 , 116 on to the shape of the support sections 111 , 112 at least partially due to the different bending radii of the clamping springs 120 , 130 to adapt to different states of tension.

The clamp springs 120 , 130 are on both sides of the housing 110 edged so that in particular no lateral openings in the housing for mounting the clamping springs 120 , 130 are provided and the clamping springs 120 , 130 by sliding it onto the support sections 111 , 112 and an accompanying insertion between two side housing walls 117 , 118 of the housing 110 in the case 110 are mountable ( 1C ).

1D shows an example of improper use of the connector 100 , taking a screwdriver 400 is inserted into the connection terminal. Through the support section 112 can deform or destroy the clamping spring 130 be prevented.

3rd shows the clamping lever 140 by itself in a perspective view from above. The clamping lever 140 has a handle 143 for manual, tool-free actuation of the clamping lever 140 to enable. In the area of the swivel axis 141 points the clamping lever 140 Swivel feet 144 , 145 on that form-fit with the housing 110 are connected and a rotatable mounting of the clamping lever 140 on the housing 110 enable. The clamping lever 140 also has a stop surface 146 and another stop surface 147 .

As far as the clamping lever 140 is in the closed position, as in 1B , in 4th , in 5B and in 6th to recognize, shows the driver 142 a distance A. to the tab 122 on. As far as the clamping lever 140 is in the open position, as in the 5A shown, the driver lies 142 on the tab 122 at.

A pivoting of the clamping lever 140 from the closed position to the open position causes a distance between the current bar to increase 160 and the contact leg 121 , the clamping spring 120 between the driver 142 and a stop 136 is braced. The attack 136 is part of the clamping spring 130 and forms an end portion 136 the clamping spring 130 . Likewise forms an end section 126 the clamping spring 120 a stop 126 for the clamp spring 130 .

The clamp springs 120 , 130 therefore have end sections 126 , 136 that rest against each other, the clamping spring 120 as far as the clamping lever 140 is in the open position, between the driver 142 and the end section 136 the other clamping spring 130 is tensioned, and the further clamping spring 136 as far as the further clamping lever 150 is in the open position, between the end portion 126 the clamping spring 120 and the driver 152 of the further clamping lever 150 is tense. The clamp springs 120 , 130 are thus supported against one another in abutment at the ends.

The current bar 160 has a paragraph 161 on which the contact leg 121 as far as the clamping lever 140 is arranged in the closed position and no conductor in the area of the clamping lever 140 in the housing 110 is introduced. The current bar 160 has another paragraph 162 on which the contact leg 131 as far as the clamping lever 150 is arranged in the closed position and no conductor in the area of the clamping lever 150 in the housing 110 is introduced ( 1B) .

For establishing an electrically conductive connection between two electrical conductors 200 , 300 , can the ladder 200 , 300 into the connection terminal 100 be pushed in while the clamping lever is moving 140 , 150 are in their closed position (cf. 4th ). Hence becomes the electrical conductor 200 with an end section 210 into an opening 113 of the housing 110 the connection terminal 100 introduced.

The end section 210 displaces the clamping leg 121 the clamping spring 120 so that the end section 210 due to the spring force of the clamping spring 120 between the clamp leg 121 and the current bar 160 is braced. The end section 126 the clamping spring 120 forms a stop for the end section 210 of the head 200 .

Likewise, an end section 310 of the head 300 into an opening 114 of the housing 110 be introduced to between the clamping legs 131 the clamping spring 130 and the current bar 160 to be tense.

Via the electrically conductive current bar 160 is therefore an electrically conductive connection between the conductors 200 , 300 produced. Both the clamp legs 121 , 131 as well as the paragraphs 161 , 162 of the current bar 160 act in conjunction with the clamping force of the springs 120 , 130 pulling out the ladder 200 , 300 from the connection terminal 100 opposite. 5B shows a state in which both conductors 200 , 300 with their end sections 210 , 310 inside the connection terminal 100 are tense.

Alternatively, before inserting a conductor 200 , 300 an opening of the clamping lever 140 , 150 as in 5A shown as an example. Once the ladder ends 210 , 310 are positioned in the respective housing openings 113, 114, the clamping levers 140, 150 from the in 5A open position shown in 5B Shown closed position pivoted back to the ladder 200 , 300 inside the connection terminal 100 to brace and over the current bar 160 to contact each other.

To adjust the swivel path in the in 5A To limit the open position shown, the clamping lever lies 140 with its stop surface 147 on the housing 110 at. The clamping lever is located in the same way 150 with a stop surface 157 on the housing 110 at. In addition, there is the stop surface 146 of the clamping lever 140 on a stop surface 156 of the clamping lever 150 supported.

To the functioning of the from the clamping levers 140 , 150 , the assigned clamping springs 120 , 130 and the current bar 160 formed clamping mechanism of the connection terminal 100 To further clarify, these components are in 6th shown in isolation, the clamping lever 140 is shown in the closed position, and the clamping lever 150 shown in the open position.

It can be seen that the driver 142 according to the closed position of the clamping lever 140 to the tab 122 is spaced and pivoting, as for the clamp spring 130 and the clamping lever 150 shown as an example in the open position, a tensioning of the spring 130 causes.

It can also be seen that by pivoting a clamping lever 140 , 150 the respective clamp leg 121 , 131 from the current bar 160 is moved away as soon as the respective driver 142 , 152 when pivoting the respective clamping lever 140 , 150 from the closed position to the open position with the associated tab 122 , 132 arrives in plant.

List of reference symbols

100

Connection terminal

110

casing

111

Support section

112

Support section

113

opening

114

opening

115

Rounding

116

Rounding

117

Side housing wall

118

Side housing wall

120

Clamp spring

121

Contact leg

122

Tab

123

Through opening

124

Retaining leg

125

Connection section

126

End section

130

Clamp spring

131

Contact leg

132

Tab

133

Through opening

134

Retaining leg

136

End section

140

Clamping lever

141

Swivel axis

142

Carrier

143

Handle

144

Swivel base

145

Swivel base

146

Stop surface

147

Stop surface

150

Clamping lever

151

Swivel axis

152

Carrier

156

Stop surface

157

Stop surface

160

Current bar

161

attack

162

attack

200

ladder

210

End section

300

ladder

310

End section

400

screwdriver

A.

distance

B1

width

Claims (11)

Connection terminal (100) for connecting an electrical conductor, with a housing (110), with a clamping spring (120) arranged in the housing (110), with a current bar (160) and with a clamping lever (140), the clamping spring (120 ) has a contact leg (121) in order to tension an electrical conductor to be connected resiliently against the current bar (160), the clamping lever (140) being fastened to the housing (110), the clamping lever (140) between an open position and an The closed position can be pivoted about a pivot axis (141), the contact leg (121) having a through opening (123) with a support section (111) which penetrates the through opening (123) of the contact leg (121) and is attached to a retaining leg (124) of the Clamping spring (120) is applied. Connection terminal (100) Claim 1 , characterized in that the housing (110) has the support section (111) or the support section is provided on the current bar and / or that an end section of the support section (111) resting on the retaining leg (124) of the clamping spring (120) has a curvature or Has rounding (115). Connection terminal (100) Claim 1 or 2 , characterized in that the clamping lever (140) has a driver (142), the driver (142) being assigned a tab (122) of the clamping spring (120) which is provided on the contact leg (121) of the clamping spring (120) . Terminal (100) Claim 3 , characterized in that the tab (122) is formed in one piece with the clamping spring (120) and is punched out of the contact leg (121) of the clamping spring (120), the through opening (123) essentially having the dimensions of the punched-out tab (122) having. Terminal (100) Claim 3 or 4th , characterized in that the tab (122) is arranged in a freely cantilevered manner between the contact leg (121) and a retaining leg (124) of the clamping spring (120), the contact leg (121) and the retaining leg (124) being connected by a curved connecting section (125 ) are connected to each other. Terminal (100) after one of the Claims 3 to 5 , characterized in that the driver (142) is at a distance from the bracket (122) as long as the clamping lever (140) is in the closed position, and the driver (142) rests against the bracket (122) as far as the clamping lever is (140) is in the open position. Terminal (100) after one of the Claims 3 to 6th , characterized in that pivoting the clamping lever (140) from the closed position into the open position increases a distance between the current bar (160) and the contact leg (121), the clamping spring (120) between the driver (142) and a Stop (136) is clamped. Connection terminal (100) according to one of the preceding claims, characterized in that a further clamping spring (130) with a further clamping lever (150) is provided in order to resiliently provide a further electrical conductor to be connected to be elastically braced against the current bar (160). Terminal (100) Claim 7 or 8th , characterized in that the clamping springs (120, 130) have end sections (126, 136) which bear against one another, the clamping spring (120), as far as the clamping lever (140) is in the open position, between the driver (142) and the end section (136) of the further clamping spring (130) is tensioned, and the further clamping spring (130), as far as the further clamping lever (150) is in an open position, between the end section (126) of the clamping spring and a driver (152) of the further clamping lever (150) is clamped. Terminal (100) according to one of the preceding claims, characterized in that the clamping spring (120) is a multiple curved strip (120), the strip (120) having a constant width (B1) and / or that the current bar (160) has a shoulder (161) on which the contact leg (121) rests as long as the clamping lever (140) is arranged in the closed position and no conductor is inserted into the housing (110) in the area of the clamping lever (140). Electronic device, with at least one after one of the Claims 1 to 10 trained connection terminal (100).

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