TWI634712B - Terminal clamp - Google Patents

Abstract

The present invention relates to a terminal clip (100) for connecting electrical wires, comprising a housing (10), a current bar (12), a clamp spring having a retaining leg (15) and a clamping leg (17) (13), wherein the clamping leg (17) is for clamping a wire to the current bar (12), and the terminal clamp further comprises a yaw-movable support for manipulating the clamping spring (13) Operating element (19), wherein the operating element (19) has a shaft body (20) for the deflection of the operating element (19), wherein a receiving device (21) is provided on the holding leg (15) ), the shaft body (20) is rotatably supported therein.

Description

Terminal clamp

The present invention relates to a terminal clip for connecting an electrical lead, having a housing, a current bar, a clip spring including a retaining leg and a pin, wherein the pin is used to clamp the wire to the current bar And the terminal clip also has a steering element that is rotatably supported for actuating the grip spring.

A lever-operated terminal clamp is known from DE 10 2011 056 410 A1, which has a clamp spring constructed as a torsion spring for clamping an electrical conductor inserted into a terminal clamp to a current bar. The actuating element for actuating the clamp spring has a rotary shaft which is arranged transversely to the direction of wire insertion in the corresponding wire socket or transversely to the extension of the wire socket which extends in the direction of wire insertion to the connection point. By manipulating the rotating shaft in the area of the wiring point or in alignment with the front wire socket, the clamping spring is operated in a manner relatively close to the rotating shaft of the operating element, thereby reducing the lever force acting on the housing of the terminal clamp.

It is an object of the present invention to provide a terminal clip by which the force of actuating the housing when clamping the wire can be further reduced. The solution of the present invention to achieve the above object is a feature of an independent item. Preferred embodiments and advantageous refinements of the present invention are referred to the dependent items. The terminal clamp of the present invention is characterized in that the operating element has a shaft body for the deflection of the operating element, wherein a receiving device is arranged on the holding leg of the clamping spring to rotate the shaft body In it. Specifically, according to the present invention, the operating element is directly disposed on the retaining leg of the clip spring, unlike the pinch of the clip spring, the retaining leg is positioned in the terminal clip in a positionally fixed manner. Medium, especially in the housing of the terminal clamp. The retaining leg preferably abuts the housing in a planar manner, in particular in a planar manner against the inner wall of the inner space defining the housing. The operating element is supported on the retaining leg of the clip spring by its shaft body, so that the rotating shaft of the operating element extending through the shaft body is positioned in the region of the clip spring. In order to support the shaft of the actuating element or the actuating element on the clamping spring, a receiving device is arranged on the clamping spring, the shaft system being rotatably positionable in the receiving device. Preferably, the receiving device is directly formed on the retaining leg of the clip spring. The accommodating device is preferably integrally formed with the retaining leg, so that the accommodating device is bent from the metal band of the clip spring. By supporting the actuating element directly on the retaining leg of the clip spring, the force acting on the housing during clamping of the wire can be substantially reduced, in particular by applying the actuating element to the clamp spring for manipulation The force of the clamp spring is maintained within the clamp spring. In order to be able to rotatably support the shaft of the actuating element in the receiving device, preferably the receiving device is U-shaped and at least partially surrounds the shaft body. The shape of the accommodating device is preferably matched to the outer contour of the shaft body, so that an optimal guidance of the shaft body is achieved in the accommodating device during the yaw movement of the actuating element. The clamp spring preferably adopts a design in which the retaining leg has an opening which is passed through the free end of the current bar and is permeable to the wire to be connected. The opening is preferably constructed as a pane-like opening and is used both for the passage of the current bar and for the passage of the wire to be connected. Since the current bar and the wire to be connected both pass through the opening of the current bar, the force generated when the wire is clamped to the current bar can also be transmitted to the holding leg and to the clamp spring, thereby being clamped The spring absorbs these forces, thereby maximizing the transmission of clamping force to the housing of the terminal clamp. Thereby, the force acting on the housing when clamping the wire is further reduced. The accommodating device is preferably disposed above the opening and on the holding leg of the clip spring in a manner of being over the current bar passing through the opening. By positioning the accommodating device, the current bar and the opening relative to each other, the components can be arranged in the terminal clip in a space-saving manner, thereby reducing the structural size of the terminal clip. The structural size of the terminal clip can also be reduced by the following method: the clip is formed on the first free end of the holding leg, and the receiving device is disposed on the holding leg and the first The free end is opposite the second free end. An opening is formed in the retaining leg between the two free ends of the retaining leg. The layout of the clamping leg on the holding leg and the layout of the receiving device on the holding leg are preferably disposed on the same longitudinal side of the holding leg, and are disposed on the inner cavity of the housing and the terminal clip On the longitudinal side of the inner cavity, the wires are connected or clamped to the current bar in the inner cavity. The pinch spring pin is preferably shaped as follows: the pin has an abutment region and thereby abuts against a longitudinal side of the retaining leg such that the pin enters the open position and the closed position of the clip spring During the movement, the gripper can move along the longitudinal side of the retaining leg. Therefore, when the clip spring is manipulated, one of the grip portions can slide along the retaining leg, thereby achieving a predetermined guide to the grip by holding the leg. Preferably, the legs are not linear but are S-shaped. The S-shape through the jaws increases the clamping force to be applied by the feet without increasing the overall size, in particular the width, of the clip springs. It also improves the spring effect of the pinch. In order to form an S-shape, the clamping leg may have a first deflecting section connected to the retaining leg, a second deflecting section connected to the first deflecting section through the bending joint, and through the abutting area and the first The clamping section to which the two deflection sections are connected. The two deflection sections and the clamping section are preferably linear, and the curved joint and the abutment area are preferably curved. The two deflection sections preferably have the same length, and the clamping section preferably has a substantially reduced length. The length of the clamping section is, for example, approximately one third of the length of the deflecting section. Preferably, the two deflecting sections form a delta shape with the retaining leg. Preferably, the spring effect of the clip is achieved by the two deflection sections, wherein the deflection sections are arranged at a distance from the conductor to be connected. The wire is connected or clamped through the clamping section of the pin. Preferably, the operating element has a first operating piece and a second operating piece parallel thereto for operating the clamping spring, wherein the shaft is preferably disposed on the first operating piece Between the second manipulation pieces. The manipulating pieces are elongated and extend from the shaft body to the pinch spring pinch. In order to operate the pinch spring, the manipulating piece is pressed against the pinch by the deflecting movement of the actuating element and thereby exerts a force on the pinch. . Since the two mutually parallel operating pieces are simultaneously pressed against the clamping legs during the manipulation, a uniform force distribution can be achieved within the width of the clamping legs, wherein the manipulation of the operating elements and/or the clamping springs during the clamping springs can be avoided. Tilt in the middle. In addition, since the shaft system is disposed between the two operating pieces, the operating pieces can realize the locking of the shaft body in the accommodating device, because the operating piece prevents the shaft body from sliding out of the self-accommodating device. During the manipulation of the clamp spring, the manipulation pieces are preferably not directly pressed against the clamping section of the clamping leg, and thus are not pressed against the portion of the clamping leg that is in direct contact with the clamped wire, but Preferably, the second deflection section of the clamp spring that is not in direct contact with the conductor to be connected is operatively coupled to operate the clamp spring. Thereby, due to the extension of the lever arm between the shaft of the actuating element or the actuating element and the point of action of the actuating element on the pinch of the pinch spring, the gripper spring to be applied to the actuating element by the operator can be operated The force is greatly reduced, thereby enhancing the operational comfort of the operator of the terminal clip.

1 and 3 show a terminal clip 100 in a cross-sectional view for connecting an electrical conductor (not shown), wherein FIG. 1 shows the terminal clamp 100 in a closed position, and FIG. 3 shows the open position. Terminal clip in the middle. The terminal clamp 100 has a housing 10 made of an insulating material, wherein the housing 10 has a wire socket 11 for inserting a wire to be connected into the terminal clamp 100. A current bar 12 is provided in the housing 10 to clamp the conductor to be connected to the current bar in electrical contact. To clamp the wire to the current bar 12, the terminal clamp 100 has a clamp spring 13 that is threaded into the interior 14 of the housing 10. The clamp spring 13 has a retaining leg 15 and a clamping leg 17 connected to the retaining leg 15 through a curved section 16. The retaining leg 15 abuts at least partially planarly against the inner wall 18 of the housing 10, which inner wall 14 defines the inner cavity 14 of the housing 10. The holding leg 15 is thereby provided in the housing 10 in a positionally fixed manner. Unlike the retaining leg 15, the leg 17 extends into the inner cavity 14 of the housing 10, wherein the leg 17 is resiliently movable within the inner cavity 14 of the housing 10. The wire is clamped to the current bar 12 by the pinch 17. To operate the clamp spring 13 into the open position and/or the closed position, the terminal clamp 100 has an operating element 19 that is supported in a deflectable manner. The actuating element 19 has a shaft body 20 in the form of a shaft, wherein the axis of rotation of the actuating element 19 extends through the shaft body 20 so that the actuating element 19 is deflectable about the shaft body 20. The shaft body 20 is supported in a receiving device 21 provided on the holding leg 15 of the clip spring 13. The shaft body 20 is thereby supported on the clamp spring 13 and is not directly supported on the housing 10. Thus, the force applied to the clip spring 13 by the operating member 19 when the wire is clamped is held in the clip spring 13, so that the force acting on the housing 10 is greatly reduced. Figure 4 shows only the clamp spring 13 and the receiving means 21 provided thereon, while the other components of the terminal clamp 100 are not shown. In the design shown here, the accommodating device 21 is integrally formed with the clip spring 13 in such a manner that the accommodating device 21 is bent from the strip of the clip spring 13 . The width of the accommodating device 21 is slightly smaller than the holding leg 15. The accommodating device 21 is bent in a U-shaped or C-shaped manner, so that the accommodating device 21 at least partially surrounds the shaft body 20 having a circular cross section. Therefore, the contour of the accommodating device 21 matches the contour of the shaft body 20. Below the connection of the accommodating device 21 on the holding leg 15, a pane-like opening 22 is formed in the holding leg 15, which can be passed through the free end 37 of the current bar 12 as shown in Figure 1-3. And the wires to be connected are passed through. The wire inserted through the opening 22 into the inner cavity 14 of the housing 10 is clamped by the pin 17 of the clip spring 13 to the first side 23 of the current bar 12 facing the inner cavity 14 of the housing 10. By opposing the first side 23 and facing away from the second side 24 of the inner cavity 14 of the housing 10, the current bar 12 rests against the receiving means 21, in particular against the outer surface of the receiving means 21. . The pinch 17 of the accommodating device 21 and the clip spring 13 are thereby separated from each other by the current bar 12. The opening 22 in the retaining leg 15 is arranged in alignment with the wire socket 11 in the housing 10. In the embodiment shown here, the receiving device 21 and the clamping leg 17 are arranged on the ends 36 , 25 of the holding leg 15 which are spaced apart from one another so as to be between the receiving device 21 and the clamping leg 17 . The distance is maximized. The pin 17 is formed on the first free end 36 of the retaining leg 15, and the receiving device is disposed on the second free end 25 of the retaining leg 15 opposite the first free end 36. As shown in FIGS. 2 and 4, the width of the leg 17 is smaller than the holding leg 15. The retaining leg 15 of the clip spring 13 is linear. The pin 17 of the clip spring 13 is not linear, and the leg 17 is divided into a plurality of sections which are mutually at an angle of between 10 and 80 degrees. Therefore, the pinch 17 is S-shaped. The leg 17 is shaped such that it has an abutment region 26 by which the pinch 17 abuts against the longitudinal side 27 of the retaining leg 15 facing the inner cavity 14 of the housing 10 such that it is in the clip. When the foot 17 enters the open position and the closed position of the clip spring 13, the grip moves along the longitudinal side 27. This abutment area 26 is arched. In order to form an S-shape, the clamping leg 17 also has a first deflection section 28 connected to the holding limb 15, a second deflection section 30 connected to the first deflection section 28 through the bending joint 29, and a transmission abutment area. A clamping section 31 connected to the second deflection section 30. The spring effect of the pin 17 is achieved by the deflecting sections 28, 30 which are movable relative to each other by the bending joint 29. The two deflection sections 28, 30 have substantially the same length. The deflecting sections 28, 30 together with a portion of the retaining section 15 form a delta shape. A longitudinal slit 32 is formed in the second deflection section 30 which extends over the entire length of the deflection section 30. By providing the longitudinal slit 32 in the deflecting section 30, the spring effect of the gripper 17 can be enhanced. The conductor is clamped by direct contact of the clamping section 31 of the clamping leg 17 with the conductor. The length of the clamping section 31 is much smaller than the deflection sections 28,30. The length of the clamping section 31 is less than one third of the length of one of the deflection sections 28,30. In the range of the two deflection sections 28, 30, the curved joint 29 and the abutment region 26, the width of the clamping leg 17 is constant, while the width of the clamping section 31 is reduced, and thus the deflection zone is further reduced. The segments 28, 30, the curved joint 29 and the abutment region 26 are narrower. In order to operate the clamp spring 13 , in particular as shown in FIG. 2 , the actuating element 19 has a first actuating piece 33 and a second actuating piece 34 parallel thereto, wherein the shaft body 20 is fastened to the first actuating piece 33 and the second actuating piece Between slices 34. Starting from the shaft body 20, the two operating pieces 33, 34 extend into the inner cavity 14 of the housing 10. The two operating pieces 33, 34 are respectively passed along the side of the current bar 12, so that the current bar 12 is disposed between the two operating pieces 33, 34. The operating pieces 33, 34 in turn buckle the current bar 12. The manipulating tabs 33, 34 have a specific length to be operatively coupled to the second deflecting section 30 of the clip spring 13 without being operatively coupled to the clamping section 31 for manipulation of the clip spring 13. In the movement of the clamp spring 13 or the terminal clamp 100 into the open position and the closed position, as shown in FIGS. 1 and 3, the manipulation pieces 33, 34 move or move along the surface of the second deflection section 30. The operating element 19 also has a handle 35 by which the operator of the terminal clamp 100 can hold and deflect the operating element 19. The handle of the operating member 19 extends from the housing 10. The handle 35, the shaft body 20, and the operating pieces 33, 34 are integrally connected.

100‧‧‧Terminal clamp

10‧‧‧shell

11‧‧‧Wire socket

12‧‧‧ Current bars

13‧‧‧Clamp spring

14‧‧‧ lumen

15‧‧‧ Keeping the feet

16‧‧‧Bending section

17‧‧‧Foot

18‧‧‧ inner wall

19‧‧‧Operating elements

20‧‧‧Axis

21‧‧‧ accommodating device

22‧‧‧ openings

23‧‧‧ first side

24‧‧‧ second side

25‧‧‧ Keep the second free end of the foot

26‧‧‧Affected area

27‧‧‧ longitudinal side

28‧‧‧First deflection section

29‧‧‧Bend joint

30‧‧‧Second deflection section

31‧‧‧Clamping section

32‧‧‧ longitudinal seam

33‧‧‧First Manipulator

34‧‧‧Second manipulation piece

35‧‧‧handle

36‧‧‧ Keep the first free end of the foot

37‧‧‧Free end of the current bar

The invention will be described in detail below with reference to the drawings in conjunction with the preferred embodiments. 1 is a schematic cross-sectional view of the terminal clip of the present invention, showing the clip spring in the closed position, and FIG. 2 is a schematic diagram of the operating element, the clip spring and the current strip of the terminal clip shown in FIG. 3 is a perspective view of the terminal clip shown in FIG. 1 showing the clip spring in the open position, and FIG. A schematic perspective view of the clamp spring of the terminal clamp.

Claims (10)

A terminal clamp (100) for connecting an electric wire, comprising a casing (10), a current bar (12), and a clamp spring (13) for holding a leg (15) and a pin (17), wherein a clamping leg (17) for clamping a wire to the current bar (12) and a steering element (19) for steerable movement for manipulating the clamping spring (13), characterized in that The actuating element (19) has a shaft body (20) for the deflection of the actuating element (19), wherein a receiving device (21) is provided on the holding leg (15) for the shaft body (20) ) Rotary support in it. The terminal clip (100) of claim 1 is characterized in that the receiving device (21) is U-shaped and at least partially surrounds the shaft body (20). A terminal clip (100) according to claim 1 or 2, characterized in that the holding leg (15) has an opening (22) which is passed through the free end (37) of the current bar (12) and is The wire to be connected is passed through. The terminal clip (100) of claim 3, wherein the receiving device (21) is located above the opening (22) and above the current bar (12) passing through the opening (22) The method is provided on the holding leg (15). The terminal clip (100) of claim 1, wherein the clamping leg (17) is formed on the first free end (36) of the holding leg (15), and the receiving device (21) ) is disposed on the second free end (25) of the holding leg (15) opposite the first free end (36). The terminal clip (100) of claim 1 is characterized in that the clamping leg (17) is shaped such that it has an abutment region (26) by which the abutment region abuts Holding one of the longitudinal sides (27) of the leg (15) such that the leg can be held along the retaining leg during movement of the pin (17) into the open position and the closed position of the clip spring (13) (15) The longitudinal side (27) moves. The terminal clip (100) of claim 1, wherein the clip (17) is S-shaped. The terminal clip (100) of claim 7, characterized in that, in order to form an S-shape, the clamping leg (17) has a first deflecting section (28) connected to the holding leg (15), through the curved joint (29) a second deflecting section (30) coupled to the first deflecting section (28), and a clamping section coupled to the second deflecting section (30) through the abutting region (26) 31). A terminal clip (100) according to claim 1, characterized in that the operating element (19) has a first operating piece (33) and a second operating piece (34) parallel thereto for manipulating the clamping spring (13), wherein the shaft body (20) is disposed between the first manipulation piece (33) and the second manipulation piece (34). A terminal clamp (100) according to claim 9 characterized in that, in order to operate the clamp spring (13), the manipulation pieces (33, 34) and the second deflection section (30) of the clamp spring (13) ) Active connection.