ES2396897B1 - ELECTRICAL CONTACT. - Google Patents

Abstract

Electrical contact # It is the object of the invention to present an electrical contact (1) for terminal of the type? Without screw? which allows the connection of both electrical conductors (8) with and without ends devoid of insulating cover (8a) due to the special shape of both its contact wall (9) with the consequent contact edge (10) and its elastic arm (10) before the contact wall (9) with at least one flexion point (12) and forming an angle ({al}) between 90 ° and 180 ° between the two ends of said elastic arm (11). # In addition, the aforementioned form allows the extension (a) of the cut made by the contact edges (10), thus breaking the possible small insulating film that could appear during the cutting.

Description

Electrical contact.

The present invention has as an object an electrical contact for terminal, specifically those of the type known as "without screw" and which allows the fast connection and with complete guarantee of electrical conductors, the essential characteristics of said electrical contact being described below.

STATE OF THE TECHNIQUE.

At present, there are two well differentiated and excluding types of electrical contacts that are used for the connection of electrical conductors by means of “screwless” type terminals, forcing the former to present the end of the electrical conductor devoid of its insulating cover, while the latter have certain cutting elements that, affecting the surface of the external insulating cover and perforating it, allow contact to be established on the core or conductive element of the electrical conductor itself.

OBJECT OF THE INVENTION

It is an object of the invention to present an electrical contact that allows both different modes of connection of electrical conductors by means of "screwless" type terminals, of the type needed by the end of the electrical conductor devoid of insulating cover and that of the type with sharp elements.

In addition, the shape and design of the cutting area of the present electrical contact improves the cutting of the existing electrical contacts because in addition to making the cut until it reaches direct contact with the soul of the electrical conductor, it widens the cutting area, breaking the possible small insulating film that could appear during the aforementioned cut, thus avoiding possible false contacts.

GRAPHIC REPRESENTATION.

In order to describe in detail the essential characteristics of the electrical contact object of this invention, some drawings are attached in which, by way of non-limiting example, said electrical contact has been represented, as well as various details of its use and application practice. In the rest of the description reference will be made to these drawings.

In these drawings,

Figure 1 is a perspective and exploded view of a screwless terminal, in which the electrical contact is separated from its housing and with its base at the top, together with the positioner of the electrical conductor to be connected

Figure 2 is a perspective view of the electrical contact, its body being positioned with its base at the bottom;

Figure 3 is a plan diagram of the contact walls of the electrical contact, showing the position and dimensioning of the angles determined by these walls and their edges, also indicating the input path of the electrical conductor for connection, in this example a electrical conductor whose end is devoid of the outer insulating cover;

Figure 4 is a side section of the introduction of the electric conductor inside the positioner and specifically at the beginning of the connection operation;

Figure 5 is a schematic and plan view of the positioning of the electrical conductor against the electrical contact, according to the previous figure;

Figure 6 is a view corresponding to Figure 4 in the sequence of progress of the connection operation;

Figure 7 is a plan view corresponding to the positioning of the electric conductor, according to Figure 6;

Figure 8 draws the end of the electrical conductor showing the cuts made by the sharp edges of the electrical contact when the electrical conductor is already in the position of Figure 6;

Figure 9 is a view corresponding to Figures 4 and 6 in the sequence of progress of the connection operation and just at the moment the electrical contact reaches the soul of the electrical conductor;

Figure 10 is a plan view corresponding to the positioning of the electric conductor, according to Figure 9;

Figure 11 draws the end of the electric conductor with the cuts made in the position of Figure 9 showing in addition to the growth of the cut the widening thereof;

Figure 12 is a view corresponding to Figures 4, 6 and 9 in the sequence of progress of the connection operation and just at the final moment of connection;

Figure 13 is a plan view corresponding to the definitive positioning of the electric conductor, according to Figure 12;

Figure 14 draws the end of the electric conductor with the definitive cuts and widenings made by the sharp edges in their final position;

In figs. 5, 7 and 10 has been represented by arrows, the displacement of the central area of the electrical contact in the different positions of the electrical conductor when it is introduced therein;

Figures 15 to 18 draw the sequence of introduction and fixation inside the electrical contact of an electrical conductor, in the application variant in which it is devoid, at its end, of its outer insulating layer. In figures 16 to 18 the movement and action of the cutting edges of the electrical contact has been represented by arrows, as the end of the electrical conductor has been positioned;

Figure 15 shows the initial advance position of the connection operation;

Figure 16 is a view corresponding to Figure 15 in the sequence of progress of the connection operation and just at the moment the electrical conductor reaches the electrical contact;

Figure 17 is a view corresponding to Figures 15 and 16 in the sequence of advance of the connection operation showing the beginning of the passage of the electrical conductor through the electrical contact; Y

Finally, Figure 18 is a view corresponding to Figures 15, 16 and 17 in the final position of the advance sequence of the connection operation, showing the clamping pressure exerted by the electrical contact with respect to the electrical conductor.

DESCRIPTION

According to the figures, an embodiment of the electrical contact -1- according to the present invention, comprises two elastic arms -11- which have at least one flexion point -12- and each form an angle "0" of value between 90º and 180º between the two ends of the mentioned elastic arms (11), and which, in turn, extend into individual contact walls -9- each provided with an edge that constitutes the contact edge -10- on an electric conductor -8a connect.

The elastic arms -11- are partially joined together through a base -14- whose elongated shape reaches the height of the contact walls -9- without being in solidarity with them.

The contact walls -9- are arranged forming a certain angle "1" between 0 ° and 180 °, concave with respect to the direction of entry of the electrical conductor -8- to be connected, and also the bottom part of the contact walls -9- , opposite to the area where the base is located -14-, they are chamfered in the direction of the corresponding contact edge -10- to favor the introduction of the electric conductor -8- between said contact edges -10- that are sharp.

In the practical case of the introduction of the electrical conductor -8- with its insulating cover -8a-, the electrical contact -1- is positioned inside its housing -2- which is provided with lateral openings -3- where place the cable positioner -4- through its lateral lugs -5- and rotation axis. Positioner -4- has two circular holes -6a-, on its front -6-, and -7a-, on its back -7-, where the end of the electric conductor -8- is housed to carry out the movement rotational embossing.

Once the electrical conductor -8- is inserted in the positioner -4-, the two initiate a rotational movement, as shown sequentially in the figures, for the connection of the electrical conductor -8- in the electrical contact 1-.

To improve the introduction of the electrical conductor -8- to the electrical contact -1-, the electrical conductor -8- enters the electrical contact -1- through the chamfered area of the contact walls -9- that guide it to the contact edges 10-. To avoid possible bending of the contact walls -9- in the direction of rotation, the base -14- acts as a stop of said contact walls -9-.

During the rotational movement, once the electric conductor -8- is in contact with the cutting edges -10-, they start cutting -15- to the insulating cover -8a- of the electric conductor -8- while in turn the assembly formed by the contact walls -9- and the parts of the elastic arms -11- that are between the point of flexion -12- and the contact wall -9- are opened by flexion obtaining the extension -a- of the cut -15-.

Once the contact edges -10- reach the core -8b- of the electric conductor -8-, the contact walls 9- also open by bending, increasing the extension action -a- of the cut -15-.

Once the rotation movement reaches the end, the flexion itself accumulated in the elastic arms -11- makes the clamping of the contact edges -10- on the core -8b- of the electric conductor -8- is guaranteed and the extension -a- of the cut achieved during the entire rotation guarantees the breakage of the possible thin films of the insulating cover 8a- and thus avoiding false contacts by said thin insulating films.

In the case of practical application in which the electrical conductor -8- is introduced into the electrical contact -1- with its end devoid of the protective cover -8a-, as represented in the sequence drawn in Figures 15 to 18, on the one hand, the presence of the positioner -4- or that of the base -14- would not be necessary, and, by arranging the contact walls -9- a concave angle -�- in the direction of entry of the electric conductor -8 -, the entrance action of the electric conductor -8- on the contact walls -9- causes the assembly formed by the contact walls -9- and the parts of the elastic arms -11- that are between the point of flexion -12- and the contact wall -9- open by flexion. Once the electrical conductor -8- is connected, the flexion itself accumulated in the elastic arms -11 makes the clamping of the contact edges -10- on the core -8b- of the electrical conductor -8- is guaranteed.

Described sufficiently the object of the present invention, it should be noted that any variation in external dimensions, shape and appearance, as well as materials used in the practical realization of the electrical contact -1- referred to above, will in no way alter the essentiality thereof , being summarized in the following claims.

Claims (2)

1st. Electrical contact (1) for screwless type terminal for the connection of electrical conductors, characterized in that it comprises at least one contact wall (9) with at least one contact edge (10) to the electrical conductor (8) to connect and at least one elastic arm (11) before the contact wall (9) with at least one flexion point (12) and forming an angle (a) between 90 ° and 180 ° between the two ends of the cited elastic arm (11). 2nd. Electrical contact (1) according to the preceding claim, characterized in that it comprises a single contact wall (9) and a single elastic arm (11) before said contact wall (9). 3rd. Electrical contact (1) according to claim 2, characterized in that the contact wall (9) is arranged obliquely with respect to the axial axis of the electrical conductor (8). 4th. Electrical contact (1) according to claim 3, characterized in that the angle that forms the contact wall (9) and the axial axis of the electrical conductor (8) is concave in the direction of entry of the electrical conductor itself (8) to the electrical contact (one). 5th. Electrical contact (1) according to claim 1, characterized in that it comprises two contact walls (9) and at least one elastic arm (11) before one of the contact walls (9). 6th. Electrical contact (1) according to claim 5, characterized in that it comprises an elastic arm (11) before each of the contact walls (9). 7th. Electrical contact (1) according to claims 5 and 6, characterized in that the two contact walls (9) are arranged obliquely with respect to the axial axis of the electrical conductor (8). 8th. Electrical contact (1) according to claim 7, characterized in that the angle (�) formed by the two contact walls (9) with each other is less than 180 °. 9th. Electrical contact (1) according to claim 8, characterized in that the angle (� forman formed by the two contact walls (9) is concave in the direction of entry of the electrical conductor (8) to the electrical contact (1). 10th. Electrical contact (1) according to claims 1 to 9, characterized in that the contact edge (10) of each contact wall (9) is sharp. 11th. Electrical contact (1) according to claims 1 to 10, characterized in that the contact area between the electrical conductor (8) and the contact walls (9) when the electrical conductor (8) is connected are chamfered in the direction of the contact edge (10) and as a stop of the contact walls (9) the electrical contact (1) has a base (14) on the side opposite to the chamfered area of the contact walls (9). 12th. Electrical terminal comprising the electrical contact (1) according to the preceding claims. 13th. Electrical device comprising the electrical contact (1) according to claims 1 to 11 and / or the electrical terminal according to claim 12. SPANISH OFFICE OF THE PATENTS AND BRAND Application no .: 201130960 SPAIN Date of submission of the application: 09.06.2011 Priority Date: REPORT ON THE STATE OF THE TECHNIQUE 51 Int. Cl.: See Additional Sheet RELEVANT DOCUMENTS

Category

56 Documents cited Claims Affected

X

EP 1001489 A2 (CONRAD GERD et al.) 17.05.2000, description; figures. 1-12

X

DE 102004040792 A1 (WECO WESTER, EBBINGHAUS GMBH CO.) 04.04.2005, description; paragraphs [0045], [0058], [0060]; figures. 1-12

TO

US 6254422 B1 (FEYE-HOHMANN JURGEN) 03.07.2001, summary; description; column 5, lines 14-28; figures. 1-12

TO

GB 1471506 A (MOORHOUSE R AG) 04/27/1977, summary; figures. 1-12

Category of the documents cited X: of particular relevance Y: of particular relevance combined with other / s of the same category A: reflects the state of the art O: refers to unwritten disclosure P: published between the priority date and the date of priority submission of the application E: previous document, but published after the date of submission of the application

This report has been prepared • for all claims • for claims no:

Date of realization of the report 07.02.2013

Examiner M. P. López Sábater Page 1/4

REPORT OF THE STATE OF THE TECHNIQUE Application number: 201130960 CLASSIFICATION OBJECT OF THE APPLICATION H01R43 / 05 (2006.01) H01R4 / 48 (2006.01) H01R4 / 26 (2006.01) H02G1 / 12 (2006.01) Minimum documentation sought (classification system followed by classification symbols) H01R, H02G Electronic databases consulted during the search (name of the database and, if possible, search terms used) INVENTIONS, EPODOC State of the Art Report Page 2/4  WRITTEN OPINION Application number: 201130960 Date of Completion of Written Opinion: 07.02.2013 Statement

Novelty (Art. 6.1 LP 11/1986)

Claims Claims 2.3 1.4-12 IF NOT

Inventive activity (Art. 8.1 LP11 / 1986)

Claims Claims 1-12 IF NOT

The application is considered to comply with the industrial application requirement. This requirement was evaluated during the formal and technical examination phase of the application (Article 31.2 Law 11/1986).  Opinion Base.- This opinion has been made on the basis of the patent application as published. State of the Art Report Page 3/4  WRITTEN OPINION Application number: 201130960  1. Documents considered.- The documents belonging to the state of the art taken into consideration for the realization of this opinion are listed below.

Document

Publication or Identification Number publication date

D01

EP 1001489 A2 (CONRAD GERD et al.) 05.05.2000

 2. Statement motivated according to articles 29.6 and 29.7 of the Regulations for the execution of Law 11/1986, of March 20, on Patents on novelty and inventive activity; quotes and explanations in support of this statement Claim 1: In the prior art document D01 an electrical contact for screw-free terminal for the connection of electrical conductors comprising at least one contact wall (12,13) with at least one contact edge to the electrical conductor is disclosed to be connected and at least one elastic arm (10, 11) before the contact wall (12, 13) with at least one flexion point and forming an angle between 90 ° and 180 ° between the two ends of said elastic arm (10, 11). Therefore, this claim is not new within the meaning of article 6 of Patent Law 11/86. Claims 2 and 3: In these dependent claims, it is specified that the apparatus to be protected only has, unlike the apparatus of D01, which is symmetrical, a contact wall and a single elastic arm. As a result of this difference, the D01 apparatus requires for its realization a greater expense in material and more space for its implementation. However, an expert in the field wishing to solve these problems would not require the use of any inventive activity according to article 8 of Patent Law 11/86 to, starting from the device of D01, arrive at the one of these claims eliminating symmetry of the connector. Claims 4 to 9, and 11 and 12. These claims, dependent, are anticipated in D01 as can be seen in their figures so they are not considered new. Claim 10: That the contact edges of the apparatus of document D01 are sharp as those of this dependent claim can be read in D01 throughout the entire document. Consequently, this claim is also not new. State of the Art Report Page 4/4