KR100317686B1 - Electrical apparatus having terminals fitted with elastic cages to receive connecting conductors - Google Patents

Abstract

An electrical device having resilient cage connection terminals, each terminal comprising a conductive support element for supporting the resilient cage near one end, the cage being supported by a spring wing loop and a support wing secured to the support element. 10. An electrical device having a gripping wing connected to a support wing, said gripping wing having a window for gripping the conductor via a squeezing action, wherein the conductive support element is an intermediate element having a core and an opening. A mains connecting element, the main conductive element comprising a threaded connection strip having the same axis as the opening of the core, the main element being connected to the screw hole through the opening and the main element being connected to the main hole. It is characterized in that it is fixed to.

Description

ELECTRICAL APPARATUS HAVING TERMINALS FITTED WITH ELASTIC CAGES TO RECEIVE CONNECTING CONDUCTORS}

The present invention relates to an electrical device comprising terminals each having a conductive support element for supporting at one end an elastic cage which receives at least one connecting conductor.

An elastic cage usually used for such a terminal has a support wing that is fixed to the support element, and a gripping wing that grips one end of a conductor that is a connecting object, such as a cable. The gripping wing is connected to the support wing by a spring loop and has a window into which the conductor can be inserted. The conductor is gripped between the edge of the window and the supporting element by the force exerted by the loop.

It is desirable to select the type of terminal connection according to the type of electric device. In other words, it should be possible to use a screw terminal or an elastic terminal of the above kind, in which the conductor is gripped by sliding of a member, such as a yoke, operated by the rotation of the screw, without changing the connecting strip of the device.

It is an object of the present invention to satisfy such requirements.

1 is a side view of a terminal of the present invention embedded in an electrical device.

2 shows a terminal under assembly;

3 shows a modified terminal with a reinforcing arm.

4 is a plan view of a blank used to make the support element shown in FIG.

5 is a perspective view showing a modification of the present invention having a double terminal.

6 shows another variant of a support element with a reinforcing arm for double terminals.

Explanation of symbols on the main parts of the drawings

12: conductive support element 12b: core

12d: opening 14: main conductive element

14a: connection strip 14b: screw hole

15: screw

According to the invention,

The conductive support element of the cage is an intermediate element with an open core, which is coupled to the main conductive element which is part of the device.

The main conductive element comprises a connecting strip with a threaded hole concentric with the opening of the core, which presses the support element against the main element by screwing through the opening and engaging the threaded hole.

Preferably, the screw is provided with anti-loosening means other than the conventional screw to lock the screw to the support element or the main element. It is also possible to provide means for preventing the support element from rotating relative to the casing or cap of the device. The support element is approximately U shaped and has a first wing and a second wing on both sides of the core. The first wing supports the spring cage and also serves as a connecting arm for the connecting cable. The second wing acts as a guide arm for the assembly tool or connecting plug.

The support element may be provided with one or more reinforcing arms to improve the rigidity of the terminals. This reinforcing arm is bent from one wing and extends across the other wing, which is locked by folding or locked by an appropriately shaped element. The support element is adapted to receive two elastic cages side by side in a direction parallel to the wing and also has at least one reinforcing arm connecting the two wing parts to each other. The distance between the loop of the spring cage and the second wing is sufficient to accommodate the connecting plug. In this way, the terminal can receive the plug and connecting cable for powering the device side by side in another device.

The following detailed description is for one embodiment of the present invention with reference to the accompanying drawings.

The electric device, part of which is shown in FIG. 1, comprises a casing 10 made of an insulating material and several terminals A with an elastic cage. The cage is protected by a cover cap or other similar cover member 11 which is part of the casing.

The terminal A has a conductive support element 12, one wing 12a of which is supported by a spring cage 13. The spring cage 13 is composed of a support wing 13b fixed to the wing 12a of the support element, a gripping wing 13b and a loop 13c. The gripping wing portion 13b is connected to the support wing portion 13a by a loop 13c which acts as a spring, and also has a gripping window 13d. An end portion of the wing portion 13a is inserted into the window to be engaged. The gripping window 13d has an edge 13e, which presses the surface of the wing portion 12a on the side opposite to the surface supporting the wing portion 13a. The window 13d is used to catch one or more conductors C and capture them between the edge 13e and the wing 12a. The wing 12a of the support element 12 has a freely bent convex end 12e, which is inserted into the window 13d of the spring cage to facilitate the insertion of the cable.

The conductive support element 12 is substantially U-shaped and consists of the wing 12a and the core 12b and the other wing 12c. The support element 12 is coupled via its core 12b to the connection strip 14a of the main conductive element 14 which is part of the device. This coupling is made by a screw 15 consisting of a screw head 15a and a shaft 15b. The screw head 15a is countersunk (FIGS. 1, 2) or has a flat top surface (FIG. 3). The screw head 15a of the screw is in pressure contact with the circumference of the opening 12d provided in the core 12b, and the screw shaft 15b of the screw is in the screw hole 14b provided in the connecting strip 14a of the main element. Is inserted. The dimensions of this screw hole and screw are such that the elastic terminal can be replaced with a screw grip conductor by the normal terminal. Since the screw head 15a occupies a large part of the length of the core 12b, the screw occupies only a minimum height, thereby securing a space required by the elastic cage 13.

The screw 15 can be secured to the element 12 by other loosening means other than the normal screw of the screw shaft 15b. Examples of this loosening prevention means are notches, thin grooves or grooves 15c provided in the bottom face of the screw head 15a (see Fig. 2). Alternatively, a braking screw 15d may be provided around the screw head 15a and just below the screw head (see FIG. 3).

Other means, such as coating, gluing or brazing, may be used to lock the screw into the screw hole 14b of the support element 12 or the main conductive element 14. The wing 12c is substantially parallel to the wing 12a, but may be somewhat inclined with respect to the wing 12a. The wing 12c acts as a guide arm for the tool B. The tool is used to bend the loop 13c to secure the opening of the window 13d (see FIG. 1), thereby providing a passage for the conductor or connecting plug D. The wing 12a preferably has a free convex end 12j (see FIG. 5).

In order to facilitate the assembly of the terminals and to reduce their volume, the U-shaped support element 12 can be left in its initial form as shown in FIG. 2. The wing 12a is opened at an angle of 45 °, for example, to insert the screw 15 into the hole 12d of the support element 12 and then screw the screw into the hole 14b of the element 14 to engage it. The spring cage 13 is mounted on the wing 12a of the support element 12 and is left open before the screw is inserted into the hole 12d. Of course, the spring cage may be mounted on the wing 12a after the screw is inserted into the hole 12d. The screw is then engaged into the screw hole 14b of the main element 14 of the device, and the wing 12a is bent to a position approximately perpendicular to the core 12b. Since the distance a between the wing 12a and the wing 12c of the support element is reduced, the above configuration is used when incorporating a small terminal into the device.

The support element 12 can have an arm 12f (see FIGS. 3, 4), each of these arms being folded at the wing 12c from the wing 12a and extending across these wings. Each arm is provided with a flange 12g, which is folded back and locked behind the wing 12a (after the wing 12c, respectively) so that the tool B or plug D is provided with the wing 12c. This can prevent the wing from being deformed when applied. Since the support element 12 is wide open on the opposite side of the core 12b, the conductor C, the plug D, and the tool B are sufficiently inwards through the holes 11c and 11b of the lid member 11. You can enter.

Anti-rotation means can also be devised to prevent the support element 12 from rotating relative to the element 14. Examples of such means include a simple stop of the support element 12 against the casing or the lid of the device, as well as a pin provided in the element 14 to interact with the groove 12h provided in the support element 12. 14c (see FIG. 4) (wherein, on the contrary, grooves may be provided in element 14 and pins may be provided in support element 12), or formed in support element 12 and on both edges of element 14 There is a bracket 12i that is bent to contact with. The support element 12 is cut out of the metal strip as shown in FIG. 4.

Figure 5 shows a double terminal constructed in accordance with the present invention. The spring cages 13 are received side by side in the support element 12. The bridge-shaped rigid reinforcing arm 16 has its root at the wing 12c and is also supported at the wing 12a via the shoulder 16a, thereby increasing the rigidity of the support element and thereby the overall An integrated terminal is made. The distance between the loop 13c of the spring cage 13 and the second wing 12c is (b) sufficient to accommodate the connecting plug D, and at the same place the power supply plug D with minimal space. ) And the outgoing cable (C).

6 shows a preferred variant of the support element 12. This support element is adapted to receive two elastic cages side by side as shown in FIG. 5, but may also accommodate one elastic cage. When the support element 12 is closed (arrow F1), the two arms 12f folded out from the wing 12c extend across the elastic cage toward the wing 12a and are automatically locked to the wing.

For example, each arm may have a notch (or pin) 12k at its free end, which will engage a pin (or notch) 12l provided on the side of the wing 12a. Properly shaped ramps and surfaces are provided on the notches and pins to facilitate engagement with the assembly (see arrow F2), and also to ensure mutual locking even after they are engaged, thereby attempting to open the support element 12. Any attempt can be stopped. The arm 12f is spaced some distance from the wing when the wing 12a is opened to receive the spring cage, and the wing 12a is folded back and is in its final working position in the device so that the arm rests on the pin. It is locked and the position is fixed. Unlike the above example, the arm 12f may be locked, fitted or shouldered to the wing 12a in another manner.

According to the invention, it is possible to use a screw terminal or an elastic terminal of the above kind, which is held by the rotation of a screw, for example by sliding of a member such as a yoke, without changing the connecting strip of the device.

Claims (9)

An electrical device having resilient cage connection terminals, each terminal comprising a conductive support element for supporting the resilient cage near one end, the cage being supported by a spring wing loop and a support wing secured to the support element. An electrical device having a gripping wing connected to a support wing, the gripping wing having a window for gripping the conductor through a squeezing action, The conductive support element 12 is an intermediate element having a core 12b and an opening 12d, which is coupled to the main conductive element 14 which is part of the device, The main conductive element 14 comprises a threaded hole connecting strip 14a having the same axis as the opening 12d of the core 12b, wherein the screw 15 passes through the opening 12d and the screw hole 14b. Electrical device characterized in that the conductive support element (12) is fixed to the main conductive element (14) by being coupled to it. The electrical device according to claim 1, wherein the screw is provided with anti-loosening means for locking the screw (15) to the conductive support element (12). 2. The electrical device according to claim 1, wherein the screw is provided with anti-loosening means for locking the screw (15) to the main conductive element (14). An electrical apparatus according to claim 1, wherein elements (12h, 14c) for preventing rotation of the conductive support elements (12) are provided in the conductive support element (12) and the main conductive element (14). 2. The assembly support (B) or the connecting plug according to claim 1, wherein the conductive support element (12) is approximately U-shaped and also acts as a connecting arm for the cable (C) to be connected. An electric apparatus characterized by having, at both sides of the core (12b), a second wing (12c) serving as a guide arm for (D). 6. The first wing 12a of the conductive support element 12 is bent to position the screw 15 or its assembly tool before positioning the screw 15, and also the spring cage 13 ) After being mounted, which is folded back and the screw (15) is positioned approximately orthogonal to the core (12b). 6. The conductive support element (12) according to claim 5, wherein the conductive support element (12) has one or more reinforcing arms (12f), which arms are bent out from one of the wings (12a, 12c) and cross the other wings (12c, 12a). Electrical device characterized in that it is locked to the wing by means of elements 12g, 12k, 16a of appropriate shape. 8. The electrical device of claim 7, wherein the reinforcing arm (12f) is automatically locked to the other wing when the first wing is folded back. 2. The conductive support element (12) according to claim 1, wherein the conductive support element (12) is substantially U-shaped and has first wing portions (12a) and second wing portions (12c) on both sides of its core (12b), and also the blades. A spring cage 13 having one or more reinforcing arms 12f, 16 adapted to receive two elastic cages 13 side by side in a direction parallel to the portion and connecting the two wings 12a, 12c with each other; The distance (b) between the loop (13c) and the second vane (12c) of is sufficient to accommodate the connection plug (D).