JP2004207247A - Connecting terminal for electric conductors - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connecting terminal for electric conductors which can be produced inexpensively and has as short conducting passages as possible among various clamping places for connection of electric conductor. <P>SOLUTION: The connection terminal for electric conductors has a rigid conducting plate which is substantially flat and has a window opening, and a spring band material of one piece whose terminal is fitted into the window opening to form a clamping place for connecting an electric conductor together with the window opening. A middle part of the spring band material is fixed onto a reference face beneath the conducting plate, and all the window openings are provided above the reference face. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

  The present invention relates to a connection terminal for an electric conductor having the configuration of the general concept of claim 1.

  Such a terminal is known from FIG. 3 of German Utility Model No. 20210105. It is desirable that the manufacturing cost of such a terminal be small (in this case, mass production is a problem). This must be made of an expensive copper alloy and must have a large current-carrying cross section, i.e. a large material cross-section, in order to perform a costly construction and a function of good current conduction between the various fastening points of the electrical conductor. Prohibit too much material consumption for proper terminals.

  The object of the invention is to provide a terminal of the type defined by the preamble of claim 1, which can be manufactured inexpensively and has the shortest possible current path between the various fastening points for connecting electrical conductors. It is to be.

  This object is achieved according to the invention by the features of claim 1.

  The teachings of the present invention make it possible to produce current carrying plates with very short current carrying paths. The intermediate part, in which the position of the spring band material is fixed, is in the reference plane below the current-carrying plate, and all window openings with an upper edge which together with the end of the spring band material form one fastening point for electrical conductors, , Above the reference plane. Starting from the middle part of the spring band material, which is thus fixed in position on the lower reference plane, all ends of the spring band material penetrate only upwards into the window opening at an elevated location, where it is located above the window opening. Together with the rim, a clamping point for the electric conductor is formed.

  These window opening fastening points can be provided very close. This is because the ends of the spring band material, which transition upward from the middle portion where the position of the spring band material is fixed on both sides of the current-carrying plate at the spring bend, have the same orientation, and their required locations are not combined. The spring curves cover such window openings which do not cooperate with the ends of the respective spring curves in a small area.

  With such a configuration, the current path between the window opening tightening points is extremely short. Therefore, the current-carrying plate can be manufactured at very low cost. This is because the current-carrying plate extends at right angles to the reference plane of the terminal with as small a surface dimension as possible and is configured to be substantially flat. The current-carrying plate can be punched from a rigid material plate without any problem. The simultaneously punched window openings reduce material consumption. This is because the material of the window surface to be stamped is recycled. The current-carrying plate itself can be made of, for example, a copper alloy that is optimal for the purpose of current-carrying, but the small special structure of the new current-carrying plate with short current-carrying surfaces has a surface coating (for example by tinning or copper plating). This is because it can be produced at low cost from a steel alloy having

  According to claim 3, two or more window openings can be provided side by side on the height plane parallel to the reference plane. This has to do with the predetermined width of the terminal, ie the width allowed for a particular use case, and the width of the spring band material, on which the independent and functioning ends of the spring material must be used. As will be evident from the subsequent figures, not only the ends of the spring band material fit into the window openings, but also the slightly wider window openings have the same two closely adjacent ends on the same level of the spring band material. Used to fit into window openings.

  The mutual spacing of the spring opening clamping points, measured perpendicular to the reference plane, should be as small as possible. This shortens the current path of the current-carrying plate, reduces the material cost for manufacturing the current-carrying plate and the spring material, and significantly reduces the overall height of the terminal.

  According to an advantageous embodiment of the invention, the intermediate part in which the position of the spring band material is fixed has a resilient tongue, which is a recess in the current plate below the reference plane. And together with the lower edge of the recess form an additional clamping connection.

  Such additional clamping connections below the reference plane of the terminal may be used, for example, for additional PE connections, or the terminal may be used as a pre-installation terminal or light, as detailed in the following figures. When used as a terminal, it can be used, for example, to connect a noise elimination capacitor. Finally, in principle, such additional connections below the terminals always have additional advantages. This is because such an additional connection can accept an additional pluggable electrical conductor or can be used, for example, for the connection of a plug contact of an appliance.

  The characteristic of the rigid current-carrying plate is also particularly advantageous alone. Rigidity not only stabilizes the entire terminal, but also gives the rigid energizing plate the possibility of supporting, for example, an operating pressure piece for opening individual or all fastening points according to function. Furthermore, according to the fifth aspect, the lower end of the current-carrying plate below the reference plane can have the shape of a rigid insertion piece or, for example, the shape of a brazing connection pin. Such a configuration of the lower end of the current-carrying plate allows for a trouble-free mounting of the terminals, for example, by simple insertion into an appliance or by brazing to a conductor strip on a printed circuit.

  The terminal type according to the invention can be constructed and / or used with or without an insulator case.

  The drawings illustrate an embodiment of the invention in detail.

  1 to 3 show a current-carrying plate 10 having two small window openings 11 and 12 provided side by side and one large window opening 13 below these small window openings. The window openings define clamping points for connecting electrical conductors. The fastening points are formed between the upper edges 11a, 12a, 13a of the window openings 11, 12, 13 and the ends 14, 15, 16, 17 of the spring band material 18.

  The edges 11a, 12a, 13a of the window openings forming the fastening points are projected from the substantially flat surface of the current-carrying plate 10 in the form of a run-in ramp, and the ends 14 of the spring band material 18 facing these edges. , 15 and 16 together with an entry hopper for the connection of the electrical conductors 19 and 20 respectively.

  The spring band material 18 is manufactured in one piece from a flat spring steel plate and has ends 14, 15, 16, 17 configured in the form of leaf spring ends. The spring band material 18 is passed through the window opening 13 and the intermediate portion thereof is fixed at the lower edge of the window openings 12 and 13, and the outer edge of the spring band material 18 is specially formed of the window opening. It is press-fitted into the edge recess 21 by a pressure spring. This is just one example of the locking of the spring band material 18 in the window opening 13. Other ways of fixing the position are likewise possible, for example by locking or swaging the edge material of the window opening. The plane through which the middle part, in which the position of the spring band material 18 is fixed, passes through the window opening 13 defines the reference plane of the current-carrying plate 10 in the embodiment shown.

  In particular, FIG. 1 shows an important advantage of the new terminal. The short vertical extent of the current plate 10 guarantees a short current path between the clamping points. Due to the spring arms (spring bends) exiting from both sides of the current-carrying plate 10 and terminating at the ends 14, 15, 16 and 17, the spring band material 18 does not pass through unnecessary structural gaps where the function is not used, and is completely functional. Together, they are used only for their primary role, i.e. for applying a clamping force to the electrical conductors introduced into the respective clamping points. The overall result is a very compact structure of new terminals having only a small overall height.

  4 and 5 show a second embodiment of the terminal according to the invention. This terminal has all the features described for the embodiment of FIGS. 1-3, but according to claim 4, an additional elastic tongue 22 from the intermediate part in which the position of the spring band material 18 is fixed. It is formed and enters a recess 23 which is below the reference plane and opens upward in a U-shape. The elastic tongue 22, together with the lower edge 24 of the recess 23, forms an additional clamping connection.

  This additional clamping connection is used in the embodiment according to FIG. 5 to plug in the required plug-in contact 25 of the additional PE connection contact 26 when a new terminal is used as a PE connection terminal.

  FIG. 6 shows that the new terminal can have a plug 27 at the lower end of the current-carrying plate 10 that can be plugged directly into a plug bushing of an electrical appliance, for example.

  FIG. 7 shows that the insert present in FIG. 6 has been replaced by two brazing connection pins 28. 5 shows an embodiment of a new terminal.

  FIG. 2 shows a side view of the current-carrying plate of the first embodiment cut in a longitudinal direction.   FIG. 2 shows a perspective view of the first embodiment as viewed from one side of a current-carrying plate.   FIG. 4 shows a perspective view of the first embodiment as viewed from the other side of the conductive plate.   FIG. 3 shows a perspective view of a second embodiment corresponding to FIG. 2.   FIG. 2 shows a side view of the second embodiment corresponding to FIG. 1.   FIG. 3 shows a perspective view of a third embodiment corresponding to FIG. 2.   FIG. 4 shows a perspective view of a fourth embodiment corresponding to FIG. 2.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 10 Current carrying plate 11, 12, 13 Opening 14, 15, 16, 17 Terminal 18 Spring band material 19, 20 Electric conductor

Claims (5)

A connection terminal for an electric conductor,
A rigid current-carrying plate (hereinafter referred to as a current-carrying plate 10) that extends substantially flat and has window openings (11, 12, 13);
A fastening spring insertion piece (hereinafter, referred to as a spring band material 18) formed of one piece from a flat band material made of a spring steel plate;
A spring strip material (18) is passed through a window opening (13) of the current-carrying plate (10) through an intermediate portion extending transversely to the current-carrying plate (10), and fixed in position in this window opening (13);
The spring band material (18) has at least two ends (14, 15, 16, 17) in the form of leaf spring ends, these ends being located on opposite sides of the current-carrying plate (10). Starting in each case from a fixed intermediate part of the material (18), it enters one of the window openings (11, 12, 13) and together with the window openings forms a clamping point for connecting electrical conductors (19, 20). In what you do
An intermediate portion in which the position of the spring band material (18) is fixed is positioned on a reference plane of the current-carrying plate (10) extending transversely to the current-carrying plate (10);
A terminal characterized in that the reference plane is provided below the window opening such that the window openings (11, 12, 13) of the current-carrying plate (10) are above the reference plane.   Terminal according to claim 1, characterized in that the current-carrying plate (10) is made of an inexpensive steel alloy with a good conductive surface coating.   Above the reference plane, two window openings (11, 12) are provided side by side in a height plane parallel thereto, one end (14, 15) of the spring band material (18) being in each case. The terminal according to claim 1, wherein the terminal enters a window opening of the terminal.   The intermediate part in which the position of the spring band material (18) is fixed has an elastic tongue (22), which is located in the recess (23) of the current plate (10) below the reference plane. 2. The terminal according to claim 1, wherein the terminal forms an additional clamping connection with the lower edge (24) of the recess (23). 3.   Terminal according to claim 1, characterized in that the lower end of the current-carrying plate (10) below the reference plane has the shape of a bayonet piece (27) or the shape of a brazing connection pin (28).

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