CN114762193A - Connection terminal and electronic device - Google Patents

Abstract

The invention relates to an electrical connection terminal (100) for connecting electrical conductors, comprising a housing (110), a clamping spring (120) arranged in the housing (110), a current bar (160) and a clamping Lever (140), wherein the clamping spring (120) has contact legs (121) for spring-resilient tensioning of the electrical conductor to be connected to the current bar (160), wherein the clamping lever (140) is fixed to the housing (110), wherein the clamping lever (140) is pivotable about a pivot axis (141) between an open position and a closed position, wherein the clamping lever (140) has a push rod (142), wherein the push rod (142) is ) corresponds to the tongue piece (122) of the clamping spring (120), the tongue piece being arranged on the contact leg (121) of the clamping spring (120).

Description

Connecting Terminals and Electronics

technical field

The present invention relates to a connecting terminal for connecting electrical conductors. The invention also relates to an electronic device having such a connection terminal.

Background technique

The connection terminals for the electrical conductors are used for detachable contact with the electrical conductors.

SUMMARY OF THE INVENTION

The object of the present invention is to propose an improved connecting terminal for connecting electrical conductors.

This object is achieved according to the invention by the features of the independent claims. Advantageous configurations and advantageous developments of the invention are set out in the subclaims.

The connecting terminal according to the invention has a housing, a clamping spring arranged in the housing, a current bar and a clamping lever, wherein the clamping spring has contact legs in order to spring elastically tension the electrical conductor to be connected to the current bar , wherein the clamping lever is fixed to the housing, wherein the clamping lever is pivotable about a pivot axis between an open position and a closed position, wherein the clamping lever has a push rod, wherein the push rod is made to correspond to the tongue of the clamping spring , the tongue is arranged on the contact leg of the clamping spring.

A particularly compact and robust design of the clamping spring within the connection terminal can be achieved by arranging the tongue, which interacts with the push rod, on the contact leg of the clamping spring.

The tongues are preferably formed in one piece with the clamping spring and are punched out from the contact legs of the clamping spring, which can have through openings substantially corresponding to the punched-out tongues. In this way, the tongue can be provided inexpensively and reliably as an integral part of the clamping spring.

It can be provided that the tongue is arranged in a freely protruding manner 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 means of a curved connecting section. As a result, the tongue can be integrated as compactly as possible into the installation space provided for accommodating the clamping spring.

The connecting section between the contacting leg and the retaining leg may be a circular arc defining an angle between the retaining leg and the contacting leg of less than 90°. Thus, the sections of the contact and retaining legs that adjoin the arcs may enclose an angle of less than 90°.

In order to prevent the clamping spring from being bent or deformed due to improper use and to guide and position the clamping spring relative to the housing, according to a further configuration of the connecting terminal it can be provided that the housing has a support section which extends through the contact leg through the opening and rests on the retaining legs of the clamping spring. Thus, the clamping spring with the through opening can be pushed onto the support section, so that the clamping spring can be positioned on the housing in a form-fitting manner with the contact legs.

It can be provided that the end section of the support section of the housing which rests on the retaining leg of the clamping spring has a curvature or rounding in order to be able to adapt the shape of the support section at least partially to different tensioning states Different bending radii of the lower clamping springs. Thus, the curvature or rounding can reduce the wear of the spring compared to a sharp-edged support, and can also reduce the friction of the spring in contact with the support section when deforming. The tensioning mechanism formed by the clamping rod, the clamping spring and the corresponding support section can thus be designed to operate more easily than sharp-edged or flat support solutions by providing the end-side rounding of the support section.

The clamping spring can be surrounded by the housing on both sides, so that in particular no lateral openings in the housing for mounting the clamping spring are provided, and the clamping spring can be pushed into the housing by pushing it onto the support section and thus into the housing installed in the housing between the two side housing walls.

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

In order to enable a simple and cost-effective construction of the clamping spring, provision can be made for the clamping spring to be a multi-bent strip, in particular a spring steel strip, wherein the strip has a constant width. When it is mentioned in the present invention that the strip has a constant width, this means that the total width of the unwound strip lying in one plane for forming the spring has a constant width. It will be appreciated that punching out the tabs, for example, will result in the tabs themselves having a smaller width than the original tape. However, the overall width of the clamping section from which the tongues are punched remains the same and continues to correspond to the width of the retaining legs. In particular, the width of the section of the clamping leg which rests on the conductor to be connected corresponds to the width of the holding leg.

Furthermore, when the clamping lever is in the closed position, the push rod can be spaced from the tongue, and when the clamping lever is in the open position, the push rod can abut against the tongue. In the closed position, this ensures that the full spring force of the spring clip is available to tension the conductor in the direction of the current bar, and no part of the spring force is lost through contact with the push rod. Thus, starting from the closed position of the clamping lever, the push rod initially performs an idle stroke until the push rod comes into contact with the tongue, wherein subsequent further opening movements can cause deformation of the clamping spring through the tongue and the push rod.

The push rod may be, for example, a protruding spine or a tab that protrudes in the width direction of the clamping spring and is formed on the clamping rod.

In particular, it can be provided that the pivoting of the clamping lever from the closed position to the open position results in an increase in the distance between the current bar and the contact leg, wherein the spring can be tensioned between the push rod and the stop.

Furthermore, the other clamping spring can be provided with another clamping lever in order to spring elastically tension the other electrical conductor to be connected onto the current bar.

In particular, the further clamping spring and the further clamping lever can be constructed similarly to the above-mentioned clamping lever and the above-mentioned clamping spring.

In particular, the connecting terminal has a mirror-symmetrical structure, wherein two conductors to be connected can be introduced into the connecting terminal on both sides in order to achieve an electrically conductive connection of the conductors to be connected.

In order to achieve a compact design of the connecting terminal, it can be provided that the clamping spring has end sections that lie against each other, wherein if the clamping lever is in the open position, the clamping spring can be tensioned between the push rod and the other clamping spring. between the end sections of the clamping spring, and if the other clamping lever is in the open position, the other clamping spring can be tensioned between the end section of the clamping spring and the push rod of the other clamping lever.

The clamping springs then support each other inside the connection terminal, so that the clamping springs can be compactly integrated into the housing of the connection terminal.

In addition, it can be provided that the clamping levers assigned to the clamping spring also bear against each other in their open position, so that the pivoting path of the respective clamping lever in the open position can be limited.

In order to specify the defined positions of the contact legs, it is possible to provide that the current bar has a shoulder on which the contact legs rest if the clamping lever is in the closed position and no conductors are introduced into the housing in the region of the clamping lever . By abutting the clamping lever against the current bar in the closed position, conductors of different diameters can be pushed between the contact leg and the current bar, wherein the contact leg can be moved away from the current bar via the conductor end or the conductor end can be pressed The distance of the part diameter, so the conductor end can be tensioned on the current bar by the contact leg.

The openings between the current bar and the contact legs are limited to accommodate the conductors and thus can be adapted automatically to the diameter of the conductors respectively to be contacted. Thus, the conductors can be brought into contact with the current bars and fixed in the connection terminals without the need to move the clamping lever from its closed position to its open position.

Alternatively, the clamp lever can be moved to its open position to lift the contact leg away from the current bar for easier insertion of the conductor end. In this way, the conductor can first be introduced into the housing without having to press the clamping legs with the conductor ends. In this way, deformation of the conductor ends during introduction into the connection terminal is avoided. Subsequent pivoting of the clamp lever from its open position to its closed position causes the contact spring to be tensioned in the direction of the current bar, with the conductor ends being tensioned between the clamp legs of the clamp spring and the current bar.

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

It can also be provided that the gripping lever has a handle in order to be able to handle the connection terminal without the use of tools and thus to be able to connect and disconnect the electrical conductor from the connection terminal without the use of tools.

It can be provided that the housing has a stop portion corresponding to the clamping lever in order to limit the pivoting stroke of the clamping lever.

The connection terminals can be designed, for example, as terminal boxes, block terminals or potential terminals.

The object according to the invention is also achieved by an electronic device which can have at least one connection terminal designed and expanded as described above.

Description of drawings

The invention is explained in more detail below by means of exemplary embodiments with reference to the drawings. which show schematically:

FIG. 1A shows a top perspective view of a connection terminal according to the present invention;

FIG. 1B shows a longitudinal cross-sectional side view of the connection terminal of FIG. 1A;

1C shows a top perspective view of a portion of the housing of the connection terminal;

FIG. 1D shows a side view of the connection terminal of FIG. 1A;

Figure 2 shows a top perspective view of the clamping spring;

Figure 3 shows a top perspective view of the clamping body;

FIG. 4 shows a longitudinal cross-sectional side view of the connection terminal with the conductor to be clamped and the clamp body of FIG. 1A in a closed position;

FIG. 5A shows a longitudinal cross-sectional side view of the connection terminal with the conductor to be clamped and the clamp body of FIG. 1A in an open position;

FIG. 5B shows a longitudinal cross-sectional side view of the connection terminal with the conductor to be clamped and the clamp body of FIG. 1A in a closed position;

Figure 6 shows a longitudinal sectional side view of the clamping body, the clamping spring and the current bar of the connection terminal.

Detailed ways

The connection terminal 100 for connecting electrical conductors has a housing 110 . In the housing 110, a clamping spring 120 and another clamping spring 130 are arranged. The connection terminal 100 has a clamping rod 140 corresponding to the clamping spring 120 . The connection terminal 100 has another clamping lever 150 which is assigned to the other clamping spring 130 . The connection terminal 100 has a current bar 160 .

The clamping spring 120 has contact legs 121 in order to tension the electrical conductor to be connected on the current bar 160 in a spring-elastic manner. The other clamping spring 130 has contact legs 131 in order to tension the electrical conductor to be connected on the current bar 160 in a spring-elastic manner.

A clamp lever 140 is fixed to the housing 110, wherein the clamp lever 140 is pivotable about a pivot axis 141 between an open position and a closed position. The clamp rod 140 has a push rod 142 . The tongue piece 122 of the clamping spring 120 corresponds to the push rod 142 . The tongue piece 122 is provided on the contact leg 121 of the clamping spring 120 .

Another clamping lever 150 is fixed on the housing 110, and the other clamping lever 150 is pivotable about a pivot axis 151 between an open position and a closed position. The other clamping rod 150 has a push rod 152 . The tongue 132 of the other clamping spring 130 corresponds to the push rod 152 . The tongue 132 is provided on the contact leg 131 of the other clamping spring 130 .

The connection terminal 100 has a mirror-symmetrical structure, wherein the geometry of the clamping spring 120 corresponds to the geometry of the clamping spring 130 . Likewise, the geometry of the clamping rod 140 corresponds to the geometry of the other clamping rod 150 .

The geometry of the clamping springs 120 , 130 is explained below with reference to FIG. 2 by means of the clamping spring 120 as an example. Furthermore, the geometry of the clamping rods 140, 150 is explained with reference to FIG. 3 by means of the clamping rod 140 as an example.

FIG. 2 shows a top perspective view of the clamp spring 120 alone. The tongue 122 is formed in one piece with the clamping spring 120 and is stamped out from the contact leg 121 of the clamping spring 120 . The contact leg 121 has a through opening 123 corresponding to the size of the punched tongue 122 .

The tongues 122 are arranged protruding freely between the contact legs 121 and the retaining legs 124 of the clamping spring 120 . The contact legs 121 and the holding legs 124 are connected to each other by means of curved connecting sections 125 .

The through opening 123 is used to position the clamping spring 120 on the housing 110 . The housing 110 thus has a support section 111 which passes through the through opening 123 of the contact leg 121 and rests on the holding leg 124 of the clamping spring 120 . The clamping spring 120 is a multi-bent strip, wherein the strip has a constant width B1.

Likewise, the housing 110 has a support section 112 which passes through a through opening 133 of the clamping spring 130 and rests on the holding legs 134 of the clamping spring 130 . The clamp spring 130 is a multi-bent strip, where the strip has a constant width.

Thus, the respective clamping spring 120 , 130 can be pushed with its through opening onto the corresponding support section 111 , 112 , so that the respective clamping spring 120 , 130 with its contact legs 121 , 131 is in a form-fitting manner. way is positioned on the housing 110 .

The support sections 111 , 112 of the housing 110 have bends or roundings 115 , 116 at the ends in order to adapt the shape of the support sections 111 , 112 at least partially to the different tensions of the clamping springs 120 , 130 Different bending radii in the state.

The clamping springs 120 , 130 are surrounded on both sides by the housing 110 , so that in particular no housing lateral openings are provided for mounting the clamping springs 120 , 130 and the clamping springs 120 , 130 can be pushed to the support section 111 , 112 , and thereby pushed between the two side housing walls 117 , 118 of the housing 110 to be installed in the housing 110 ( FIG. 1C ).

FIG. 1D shows an example of misuse of the connection terminal 100, in which a screwdriver 400 is introduced into the connection terminal. Deformation or damage of the clamping spring 130 can be prevented here by the support section 112 .

FIG. 3 shows a top perspective view of the clamp bar 140 alone. The clamp lever 140 has a handle 143 to allow manual operation of the clamp lever 140 without tools. In the region of the pivot shaft 141 , the clamping lever 140 has pivot feet 144 , 145 , which are positively connected to the housing 110 and allow the clamping lever 140 to be rotatably supported on the housing 110 . The clamping rod 140 also has a stop surface 146 and a further stop surface 147 .

If the clamping rod 140 is in the closed position, as shown in FIGS. 1B , 4 , 5B and 6 , the push rod 142 has a spacing A relative to the tongue 122 . If the clamp bar 140 is in the open position, as shown in FIG. 5A , the push bar 142 abuts the tongue 122 .

Pivoting the clamp lever 140 from the closed position to the open position causes the distance between the current bar 160 and the contact leg 121 to increase, with the clamp spring 120 tensioned between the push rod 142 and the stop 136 . The stop 136 is part of the clamping spring 130 and forms an end section 136 of the clamping spring 130 . Likewise, the end section 126 of the clamping spring 120 forms a stop for the clamping spring 130 .

The clamping springs 120 , 130 therefore have end sections 126 , 136 lying against each other, wherein if the clamping lever 140 is in the open position, the clamping spring 120 is tensioned at the end of the push rod 142 and the other clamping spring 130 between the end sections 136 and if the other clamping lever 150 is in the open position, the other clamping spring 130 is tensioned between the end section 126 of the clamping spring 120 and the push rod 152 of the other clamping lever 150 between. The clamping springs 120 , 130 thus support each other at the ends against each other.

The current bar 160 has a shoulder 161 on which the contact leg 121 rests if the clamping lever 140 is in the closed position and no conductors are introduced into the housing 110 in the region of the clamping lever 140 . The current bar 160 has a further shoulder 162 on which the contact leg 131 rests if the clamping lever 150 is in the closed position and no conductors are introduced into the housing 110 in the region of the clamping lever 150 ( FIG. 1B ). ).

In order to establish an electrically conductive connection between the two electrical conductors 200, 300, the conductors 200, 300 can be pushed into the connection terminal 100 with the clamping levers 140, 150 in their open position (see Figure 4). Thus, the electrical conductor 200 is introduced with the end section 210 into the opening 113 of the housing 110 of the connection terminal 100 .

The end section 210 presses the clamping leg 121 of the clamping spring 120 here, so that the end section 210 is tensioned between the clamping leg 121 and the current bar 160 due to the spring force of the clamping spring 120 . The end section 126 of the clamping spring 120 here forms a stop for the end section 210 of the conductor 200 .

Likewise, the end section 310 of the conductor 300 may be introduced into the opening 114 of the housing 110 for tensioning between the clamping legs 131 of the clamping spring 130 and the current bar 160 .

Thus, a conductive connection between conductors 200 , 300 is established through conductive current bars 160 . Both the clamping legs 121 , 131 and the shoulders 161 , 162 of the current bar 160 here act together with the clamping force of the springs 120 , 130 to prevent the conductors 200 , 300 from being pulled out of the connection terminal 100 . FIG. 5B shows a state in which the two conductors 200 , 300 are tensioned within the connection terminal 100 with their end sections 210 , 310 .

Alternatively, the clamping bars 140, 150 may be opened prior to the introduction of the conductors 200, 300, as shown in the example in Figure 5A. Once the conductor ends 210, 310 are positioned in the respective housing openings 113, 114, the clamp bars 140, 150 pivot from the open position shown in FIG. 5A back to the closed position shown in FIG. 5B to hold the conductors 200 , 300 are tensioned in the connection terminal 100 and contact each other through the current bar 160 .

In order to limit the pivoting path in the open position shown in FIG. 5A , the clamping lever 140 rests with its stop surface 147 on the housing 110 . Likewise, the clamping rod 150 rests with its abutment surface 157 on the housing 110 . Furthermore, the stop surface 146 of the clamping lever 140 is supported on the stop surface 156 of the clamping lever 150 .

In order to further clarify the functional manner of the clamping mechanism of the connection terminal 100 formed by the clamping rods 140, 150, the corresponding clamping springs 120, 130 and the current bars 160, these components are shown separately in FIG. 6, wherein the clamping The lever 140 is shown in the closed position and the clamp lever 150 is shown in the open position.

It can be seen that the push rod 142 is spaced from the tongue 122 in the closed position of the clamp lever 140 and that pivoting causes tensioning of the spring 130 as exemplarily shown for the clamp spring 130 and clamp lever 150 in the open position Show.

It can also be seen that if the corresponding push rod 142, 152 abuts the corresponding tongue 122, 132 when the corresponding clamping rod 140, 150 is pivoted from the closed position into the open position, the corresponding clamping legs 121, 150 131 is moved away from the current bar 160 by the pivoting of the clamp bars 140 , 150 .

Description of reference numerals

100 Connection terminals

110 shell

111 Support section

112 Support section

113 Opening

114 Openings

115 Rounded part

116 Rounded part

117 Side housing wall

118 Side shell wall

120 Clamping spring

121 Contact Legs

122 tongue

123 Through opening

124 Keep the legs

125 Connection section

126 end section

130 Clamping spring

131 Contact Legs

132 tongue

133 Through opening

134 Keep the legs

136 end section

140 Clamping rod

141 Pivot shaft

142 putter

143 handle

144 Pivoting feet

145 Pivot feet

146 Stop surface

147 Stop surface

150 Clamping rod

151 Pivot axis

152 putter

156 Stop surface

157 Stop surface

160 current bars

161 Stopper

162 Stopper

200 conductors

210 end section

300 conductors

310 End Section

400 screwdriver

A Spacing

B1 width

Claims (11)

1. A connecting terminal (100) for connecting electrical conductors, having a housing (110), a clamping spring (120) arranged in the housing (110), a current bar (160) and a clamping rod (140) , wherein the clamping spring (120) has contact legs (121) for spring-resilient tensioning of the electrical conductor to be connected to the current bar (160), wherein the clamping rod (140) is fixed to the housing (110), wherein the clamping lever (140) is pivotable about a pivot axis (141) between an open position and a closed position, wherein the clamping lever (140) has a push rod (142), wherein the The push rod (142) corresponds to the tongue piece (122) of the clamping spring (120), and the tongue piece is arranged on the contact leg (121) of the clamping spring (120). 2. The connection terminal (100) according to claim 1, wherein the tongue (122) is formed in one piece with the clamping spring (120) and is formed from the contact leg (121 of the clamping spring (120) ), wherein the contact legs (121) have through openings (123) substantially corresponding to the dimensions of the stamped tongues (122). 3. The connecting terminal (100) according to claim 1 or 2, characterized in that the tongue piece (122) is arranged in a freely protruding manner on the contact leg (121) and the holding leg (124) of the clamping spring (120) ), wherein the contact leg (121) and the holding leg (124) are connected to each other by a curved connecting section (125). 4. The connection terminal (100) according to claim 2 or 3, characterized in that the housing (110) has a support section (111) which passes through the through opening (111) of the contact leg (121). 123) and rest on the retaining legs (124) of the clamping spring (120). 5. The connection terminal (100) according to any one of the preceding claims, characterized in that the clamping spring (120) is a multi-bent strip, wherein the strip has a constant width (B1). 6. The connection terminal (100) according to any one of the preceding claims, characterized in that, when the clamping lever (140) is in the closed position, the push lever (142) is spaced from the tongue (122), and When the clamping rod (140) is in the open position, the push rod (142) rests on the tongue (122). 7. The connection terminal (100) according to any one of the preceding claims, wherein pivoting of the clamping lever (140) from the closed position to the open position causes the current bar (160) and the contact leg (121) ), wherein the clamping spring (120) is tensioned between the push rod (142) and the stop. 8. The connection terminal (100) according to any one of the preceding claims, characterized in that the further clamping spring (130) is provided with a further further clamping lever (150) in order to attach the further to-be-connected The electrical conductor springs are elastically tensioned onto the current bar (160). 9 . The connecting terminal ( 100 ) according to claim 7 , wherein the clamping springs ( 120 , 130 ) have end sections ( 126 , 136 ) which abut against each other, wherein if the clamping rods ( 140) in the open position, the clamping spring (120) is tensioned between the push rod (142) and the end section (136) of the further clamping spring (130), and if the further clamping rod ( 150 ) is in the open position, the further clamping spring ( 130 ) is tensioned between the end section ( 126 ) of the clamping spring and the push rod ( 152 ) of the further clamping lever ( 150 ) between. 10. The connection terminal (100) according to any one of the preceding claims, characterized in that the current bar (160) has a shoulder (161) if the clamping lever (140) is in the closed position and no conductor is clamped Insertion into the housing (110) in the region of the holding rod (140), the contact leg (121) then rests on the shoulder. 11. Electronic device having at least one connection terminal (100) according to any one of claims 1 to 10.

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