CN114552241A - Connecting device, connecting element, and electronic apparatus - Google Patents

Abstract

The invention relates to a connecting device (100) for connecting electrical conductors, comprising a current bar (110) and a clamping spring (111) for clamping a conductor to be connected relative to the current bar (110), wherein the clamping spring (111) comprises a clamping leg (112) that can be moved into an open position and a clamping position, and a holding leg (113), wherein the clamping leg (112) clamps the conductor to be connected to a lower side (122) of the current bar (110), and wherein the holding leg (113) comprises a first leg section (114) that is curved and that, in the event of a line contact, is supported on an upper side (121) of the current bar (110) opposite the lower side (122).

Description

Connecting device, connecting element, and electronic apparatus

Technical Field

The invention relates to a connecting device for connecting electrical conductors. The invention further relates to a connecting element having such a connecting device and to an electronic device.

Background

Connecting devices for connecting electrical conductors usually have a current bar and a clamping spring for clamping the conductor to be connected to the current bar. The clamping spring is usually designed as a helical leg spring having a holding leg which is mounted in a stationary manner and a clamping leg which is arranged so as to be pivotable relative to the holding leg. The clamping legs can be moved by a pivoting movement into an open position and into a clamping position, wherein in the open position a conductor can be inserted into and removed from a conductor connection chamber between the clamping legs of the clamping spring and the current bar, and wherein in the clamping position of the clamping legs a conductor inserted into the conductor connection chamber is clamped against the current bar.

Disclosure of Invention

The object of the invention is to provide a connecting device, a connecting element and an electronic device, which are characterized by a structure which is as compact as possible and at the same time reliable connection of conductors.

According to the invention, this object is achieved by the features of the independent claims. Advantageous embodiments and advantageous refinements of the invention are specified in the dependent claims.

The connecting device according to the invention has a current bar and a clamping spring for clamping a conductor to be connected to the current bar, wherein the clamping spring has a clamping leg and a holding leg which can be moved into an open position and a clamping position, wherein the clamping leg clamps the conductor to be connected to the underside of the current bar, and wherein the holding leg has a first leg section which is of curved configuration and which, with line contact, is supported on the upper side of the current bar opposite the underside.

According to the invention, the clamping spring is supported and supported at least in regions on the current bar by its holding legs. The clamping spring is supported at least by the first leg section of the holding leg on the upper side of the current bar, and the conductor to be connected is clamped by means of the clamping leg of the clamping spring on the lower side opposite the upper side, so that a self-stabilizing system is formed, which enables a reliable and stable clamping of the conductor to be connected. The first leg section, with which the retaining leg is placed or supported on the upper side of the current bar, is configured in a curved manner. The first leg section of the holding leg is therefore not exactly straight or flat and is not placed over the entire surface on the upper side of the current bar. In contrast, the first leg section rests on the upper side of the current bar only with a partial surface of the first leg section that is smaller than the total surface area of the first leg section due to the curved shape. The remaining part of the first leg section is preferably arranged at a distance from the current bar, in particular at a distance from the upper side of the current bar. At the position where the first leg section abuts against the upper side of the current bar, a line contact is formed between the current bar and the first leg section, which means that the first leg section abuts against the current bar linearly and therefore along a preferably narrow line. The line contact preferably extends along the width of the current bar or along the width of the first leg section and thus transversely to the length of the current bar or transversely to the length of the first leg section. The line contact therefore requires a very small area, so that the connection device can be constructed more compactly. Two such clamping springs can also be provided on the current bar, so that two conductors can be connected.

Preferably, the first leg section is of S-shaped curved configuration. The first leg section has sufficient stability by the S-shape. In the region of the curvature of the S-shaped leg section pointing in the direction of the current bar, the first leg section preferably forms a line contact with the current bar. The first leg section has, by means of the S-shape, two bends which are formed at a distance from one another along the length of the first leg section, wherein one of the two bends rests against the current bar in order to form a line contact, and the other of the two bends is spaced as far as possible from the current bar, in particular from the upper side of the current bar.

The retaining leg is preferably divided into a plurality of leg sections, wherein the leg sections can each be oriented at an angle to one another. Preferably, the holding leg has, in addition to the first leg section, a second leg section and a third leg section, wherein the second leg section can be arranged between the first leg section and the third leg section, and wherein the third leg section can be arranged between the second leg section and the clamping leg. The first leg section can thus form the free end section of the holding leg and therefore of the clamping spring, since the first leg section is connected to the second leg section by one of its two ends and is free at the other of the two ends. By means of such a design of the clamping spring with three leg sections of the holding leg and the clamping leg, the clamping spring can have an annular shape (Schlaufenform). The second leg section may be oriented substantially perpendicular to the third leg section. The first leg section can be formed on the second leg section by means of a bend, wherein the bend can be designed such that the first leg section can be bent in the direction of the clamping leg of the clamping spring. The clamping leg may be connected to the third leg section by an arc-shaped section. With this embodiment, the clamping spring can be substantially triangular. The clamping spring can be designed to be self-supporting by means of this shaping.

Preferably, the first leg section can be configured to be curved and connected to the second leg section such that the first leg section, starting from the second leg section, first extends beyond the upper side of the current bar and, in the further course, is curved in the direction of the upper side of the current bar. The first leg section can therefore extend at a distance from the current bar directly adjacent to the connection of the first leg section on the second leg section. The first leg section is then only contacted, to be precise in the form of a line contact, with the current bar in the course of the first leg section along the length of the first leg section away from the connection on the second leg section. The line contact between the first leg section and the current bar is therefore preferably formed at a distance from the connection or connecting point of the first leg section on the second leg section.

The clamping spring may be hung on the current bar. To achieve this, the second leg section can have openings through which the current bars can be guided. The opening can be formed, for example, in the form of a window-shaped opening in the second leg section, so that the opening can be completely enclosed. In the region of the opening, the clamping spring can thus be placed on the current bar, in particular on the upper side of the current bar.

In order to be able to achieve a high stability of the arrangement of the clamping spring on the current bar, the second leg section can have a latching hook which can protrude into the opening and can be supported by its end edge on the current bar. The latching hook preferably extends transversely to the longitudinal direction of the current bar, so that it meets and is supported at right angles to the current bar. The stop hook is supported on the upper side of the current bar. The end edge of the latching hook is preferably designed linearly, so that the latching hook can rest with its end edge flat against the current bar.

The connecting device preferably also has an actuating element for actuating the clamping leg of the clamping spring, wherein the actuating element can have a first actuating leg and a second actuating leg arranged at a distance from the first actuating leg, wherein a free space can be formed between the first actuating leg and the second actuating leg, in which free space a first leg section of the clamping spring can be arranged. The two actuating legs preferably extend parallel to one another. The two actuating legs can be pressed directly onto the clamping legs of the clamping spring in order to actuate the clamping spring. By means of the free space between the two actuating legs and the arrangement of the first leg section of the retaining leg in this free space, a particularly compact design of the clamping spring and the actuating element arrangement can be achieved.

A first sliding surface can be formed on the first actuating leg and a second sliding surface can be formed on the second actuating leg, wherein the two actuating legs rest with the first sliding surface and the second sliding surface against the second leg section of the clamping spring and can slide along when the clamping leg is actuated. This allows a reliable guidance of the actuating element on the clamping spring to be achieved with a compact design. The two sliding surfaces preferably extend parallel to the longitudinal direction of the second leg section of the clamping spring, so that the two actuating legs can slide with their sliding surfaces along the length of the second leg section and are therefore guided. By the direct contact of the actuating leg and thus of the actuating element on the second leg section of the retaining leg, the conductor connection chamber (into which the conductor is inserted and clamped) can be defined or closed in particular laterally, so that a lateral offset of the conductor from the conductor connection chamber can be prevented. The two actuating legs preferably extend transversely to the second leg section of the retaining leg. The two sliding surfaces are preferably formed on edge surfaces of the two actuating legs which point in the direction of the second leg section.

The actuating element may also have a conductor insertion well for inserting a conductor to be connected, wherein the conductor insertion well may be laterally defined by the first and second actuating legs, respectively. The actuating leg of the actuating element can thus already guide the conductor laterally when it is inserted into the conductor connection chamber, so that here already a lateral displacement of the conductor can be prevented.

The actuating element is preferably guided in a linearly movable manner. The actuating direction of the actuating element is preferably configured transversely to the insertion direction of the conductor into the conductor connection chamber.

The solution according to the object of the invention is also achieved by means of a connecting element having a housing in which a connecting device constructed and improved as described above can be arranged. The connection elements can be, for example, connection terminals, such as terminal blocks (Reihenklemme) or circuit board connection terminals.

The solution according to the object of the invention is furthermore achieved by means of an electronic device having at least one connecting device constructed and improved as described above and/or at least one connecting element constructed and improved as described above.

Drawings

The present invention will be explained in detail according to preferred embodiments with reference to the accompanying drawings. Wherein the content of the first and second substances,

figure 1 shows a schematic view of a clamping spring of a connecting device according to the invention,

figure 2 shows a schematic cross-sectional view of a connection device according to the invention,

fig. 3 shows a schematic cross-sectional view of a connecting element according to the invention, an

Fig. 4 shows a schematic illustration of a connecting device according to the invention with two clamping springs arranged on a current bar and two actuating elements.

Detailed Description

Fig. 1 shows a clamping spring 111, by means of which an electrical conductor to be connected can be clamped to a current bar 110 and thereby connected, as shown, for example, in fig. 2.

The clamping spring 111 is a stamped and bent piece. The clamping spring 111 has a clamping leg 112 and a retaining leg 113. The holding leg 113 is arranged in a stationary manner, while the clamping leg 112 can be pivoted relative to the holding leg 113, so that the clamping leg 112 can be moved into the open position and into the clamping position.

The retaining leg 113 has three leg sections, namely a first leg section 114, a second leg section 115 and a third leg section 116. The first leg section 114 forms a free end of the clamping spring 111. The second leg section 115 is disposed between the first leg section 114 and the third leg section 116. The third leg section 116 is arranged between the second leg section 115 and the clamping leg 112. The clamping leg 112 is connected to the third leg section 116 and thus to the retaining leg 113 via an arc-shaped section 117.

The leg sections 114, 115, 116 are each formed at an angle to one another. The second leg section 115 is oriented at an angle of about 90 ° to the third leg section 116. The clamping spring 111 is bent with its clamping leg 112 and its retaining leg 113 in such a way that the clamping spring 111 has a triangular shape in a plan view from the side of the initial position of the clamping spring 111 (as shown in fig. 1).

The second leg section 115 and the third leg section 116 are each configured as a straight line. In contrast, the first leg portion 114 is not configured linearly, but rather the first leg portion 114 is configured curved. The first leg section 114 is in this case formed in an S-shaped bent manner.

By this S-shaped bending of the first leg section 114, the first leg section has a first bend 118 and a second bend 119. The first bend 118 is formed closer to the connection 120 of the first leg section 114 to the second leg section 115 than the second bend 119. The first bend 118 is connected here directly to the connection point 120.

As can be seen in fig. 2, the first leg portion 114 rests by means of a second bend 119 on an upper side 121 of the current bar 110, so that the first leg portion 114 is supported by means of its second bend 119 on the current bar 110. The first leg portion 114 is supported with its second bend 119 on the upper side 121 of the current bar 110 in such a way that a line contact is formed between the first leg portion 114 and the current bar 110. The line contact extends over the width of the current bar 110 and the width of the first leg section 114, so that the line contact is formed transversely to the longitudinal extent of the current bar 110 and transversely to the longitudinal extent of the first leg section 114. In the region of the second bend 119, the only contact point of the first leg section 114 with the current bar 110 is designed in the form of a line contact.

In the region of the second bend 119 of the first leg portion 114, the first leg portion 114 has as large a distance as possible from the current bar 110, in particular from the upper side 121 of the current bar 110. The first leg section 114 is thus formed in a curved manner and connected to the second leg section 115 in such a way that the first leg section 114, proceeding from the second leg section 115, extends first beyond the upper side 121 of the current bar 110 and, in the further course, is formed in a curved manner in the direction of the upper side 121 of the current bar 110.

The clamping of the conductor to be connected is effected on the underside 122 of the current bar 110 opposite the upper side 121 by means of the clamping leg 112 of the clamping spring 111.

The second leg section 115 has a window-shaped opening 123 through which the current bar 110 is guided. The clamping spring 111 is thereby suspended on the current bar 110. In the region of the opening 123, the second leg section 115 has a latching hook 124, which extends into the opening 123 and rests with its end edge 125 on the upper side 121 of the current bar 110 and is supported thereby on the current bar 110. The end edge 125 is designed linearly, so that the end edge 125 bears over its entire length against the upper side 121 of the current bar 110. The arresting hook 124 extends in the longitudinal direction of the second leg section 115 such that the arresting hook 124 extends transversely to the longitudinal extension of the current bar 110.

The opening 123 is delimited by two longitudinal edge surfaces 126a, 126b of the second leg section 115, which extend parallel to one another and two transverse edge surfaces 127a, 127b of the second leg section 115, which extend in the longitudinal direction of the second leg section 115 and which extend transversely to the longitudinal direction of the second leg section 115. A latching hook 124 is formed on the transverse edge surface 127a and the latching hook 124 extends from the transverse edge surface 127a into the opening 123.

Fig. 2 shows a cross section of the connection device 100. The connecting device has an actuating element 128 in addition to the current bar 110 and the clamping spring 111. The actuating element 128 can be moved linearly in the actuating direction B in order to move the clamping legs 112 of the clamping spring 111 into the open position and into the clamping position.

Fig. 2 shows the clamping leg 112 in the open position, in which the clamping leg 112 is spaced apart from the underside 122 of the current bar 110 and the conductor connection chamber 129 is thus released, so that a conductor to be connected can be introduced into this conductor connection chamber 129 between the clamping leg 112 of the clamping spring 111 and the current bar 110.

As can be seen in particular also in fig. 4, the actuating element 128 has two actuating legs 130a, 130b which extend parallel to one another. The two actuating legs 130a, 130b bear against the clamping leg 112 of the clamping spring 111 in order to actuate the latter. The two actuating legs 130a, 130b each extend laterally past the current bar 110.

A free space 131 is formed between the two actuating legs 130a, 130b, in which free space the first leg section 114 of the retaining leg 112 is positioned.

Sliding surfaces 132a, 132b are formed on the two actuating legs 130a, 130b, respectively, by means of which sliding surfaces the two actuating legs 130a, 130b bear against the second leg section 115 of the retaining leg 112, so that the actuating legs 130a, 130b can slide along the second leg section 115 and are guided thereby. The two sliding surfaces 132a, 132b extend parallel to the longitudinal extent of the second leg section 115 of the clamping spring 111, so that the two actuating legs 130a, 130b are guided with their sliding surfaces 132a, 132b sliding along the length of the second leg section 115. By the actuating legs 130a, 130b and the actuating element 128 resting directly on the second leg section 115 of the holding leg 113, the conductor connection chamber 129 (into which the conductor is inserted and clamped in this conductor connection chamber 129) is laterally delimited or closed at least in the open position of the clamping leg 112, so that a lateral offset of the conductor from the conductor connection chamber 129 can be prevented. The two actuating legs 130a, 130b extend transversely to the second leg section 115 of the retaining leg 113. The two sliding surfaces 132a, 132b are formed on edge surfaces of the two actuating legs 130a, 130b which point in the direction of the second leg section 115.

A conductor insertion well 133 formed on the actuating element 128, through which the conductor to be connected is inserted into the conductor connection chamber 129, is also laterally delimited by the two actuating legs 130a, 130 b. Conductor insertion well 133 merges into conductor connection chamber 129.

Fig. 3 shows the connecting element 200 in a sectional view. The connecting element 200 has a housing 210 in which the connecting device 100 as shown in fig. 2 is arranged. The housing 210 has a conductor insertion opening 211 through which a conductor to be connected is inserted into the housing 210. The conductor insertion opening 211 opens into the conductor insertion well 133 and thus into the conductor connection chamber 129. The insertion direction E of the conductor to be connected is configured transversely to the actuating direction B of the actuating element 128.

The housing 210 is preferably constructed of an insulating material.

In fig. 3, the clamping leg 112 of the clamping spring 111 is shown in the clamping position.

Fig. 4 shows a connecting device 100 having a current bar 110, two clamping springs 111 arranged on the current bar 110, and two actuating elements 128. The current bar 110, the clamping spring 111 and the actuating element 128 are constructed according to the construction variant shown in fig. 1 and 2.

The connecting device 110 shown in fig. 4 enables simultaneous connection of two conductors.

Description of the reference numerals

100 connecting device

110 current bar

111 clamping spring

112 clamping leg

113 holding leg

114 first leg section

115 second leg section

116 third leg section

117 arc segment

118 first bend

119 second bend

120 connection site

121 upper side

122 lower side

123 opening

124 stop hook

125 end edge

126a, 126b longitudinal edge surfaces

127a, 127b transverse edge faces

128 operating element

129 conductor connection chamber

130a, 130b steering legs

131 free space

132a, 132b sliding surface

133 conductor insertion well

200 connecting element

210 casing

211 conductor insertion opening

B steering direction

E direction of insertion

Claims (11)

1. Connecting device (100) for connecting electrical conductors, comprising a current bar (110) and a clamping spring (111) for clamping a conductor to be connected relative to the current bar (110), wherein the clamping spring (111) has a clamping leg (112) and a holding leg (113) which can be moved into an open position and a clamping position, wherein the clamping leg (112) clamps the conductor to be connected to a lower side (122) of the current bar (110), and wherein the holding leg (113) has a first leg section (114) which is curved and, in the event of a line contact, is supported on an upper side (121) of the current bar (110) opposite the lower side (122).

2. The connecting device (100) according to claim 1, characterised in that the first leg section (114) is S-shaped curvedly configured.

3. The connecting device (100) according to claim 1 or 2, characterized in that the retaining leg (113) has a second leg section (115) and a third leg section (116), wherein the second leg section (115) is arranged between the first leg section (114) and the third leg section (116), and wherein the third leg section (116) is arranged between the second leg section (115) and the clamping leg (112).

4. The connecting device (100) according to claim 3, characterised in that the first leg section (114) is of curved design and is connected to the second leg section (115) in such a way that the first leg section (114), proceeding from the second leg section (115), initially extends beyond the upper side (121) of the current bar (110) and, in the further course, is of curved design in the direction of the upper side (121) of the current bar (110).

5. The connecting device (100) according to claim 3 or 4, characterised in that the second leg section (115) has an opening (123) through which the current bar (110) is guided.

6. Connecting device (100) according to claim 5, characterized in that the second leg section (115) has a latching hook (124) which projects into the opening (123) and is supported with its end edge (125) on the current bar (110).

7. Connecting device (100) according to one of claims 1 to 6, characterized by an actuating element (128) for actuating a clamping leg (112) of a clamping spring (111), wherein the actuating element (128) has a first actuating leg (130a) and a second actuating leg (130b) arranged at a distance from the first actuating leg (130a), wherein a free space (131) is formed between the first actuating leg (130a) and the second actuating leg (130b), in which free space the first leg section (115) of the clamping spring (111) is arranged.

8. Connecting device (100) according to claim 7, characterized in that a first sliding surface (132a) is formed on the first actuating leg (130a) and a second sliding surface (132b) is formed on the second actuating leg (130b), wherein the two actuating legs (130a, 130b) bear with the first sliding surface (132a) and the second sliding surface (132b) against the second leg section (115) of the clamping spring (111) and slide along when actuating the clamping leg (112).

9. Connecting device (100) according to claim 7 or 8, characterized in that the actuating element (128) has a conductor insertion well (133) for inserting a conductor to be connected, wherein the conductor insertion well (133) is laterally delimited by the first actuating leg (130a) and the second actuating leg (130b), respectively.

10. Connecting element (200) having a housing (210) in which a connecting device (100) configured according to one of claims 1 to 9 is arranged.

11. Electronic device with at least one connecting device (100) according to one of claims 1 to 9 and/or with at least one connecting element (200) according to claim 10.

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