MXPA00003353A - Electrical plug connection, particularly for motor vehicle applications - Google Patents

Abstract

The invention relates to an electrical plug connection comprising a plug housing, a contact housing 1 complementary to the plug housing and a transverse slide 5 for locking the plug housing in the contact housing 1. At least one spring element 40, 41 acts on at least one movable carriage 25, said spring element exerting an increasing stress on the slide 5 during the closing of the latter and pushing it back into its open position in the event of an incomplete closing operation. The slide 5 is locked in its closed position only on complete closure.

Description

ELECTRICAL CONNECTION, ESPECIALLY FOR USE IN AUTOMOBILES The invention relates to an electrical connection, especially for use in automobiles, with a plug box, a contact box that complements the plug box and a transverse latch to lock the box. pin on the contact box. A connection of this type is preferably applied to a wall of a frame in order to connect electrical connections of an installation located in the frame with external current conductors. Such connections are used as transmission wiring. Especially in the field of vehicle transmission, in addition to relatively high operating temperatures, strong vibrations are observed which can cause loosening or separation of the connections. To ensure the connection, connection blocking devices are known which ensure the retention of the socket in the contact box. During installation, however, pay attention to the fact that the locking device is in fact engaged. In practice, it can happen that the installer only places the locking device in an intermediate position in which the socket is still in the contact housing, however the locking device is not in its support position. In this case the connection can separate by itself due to the high vibrations during the operation of the vehicle. The object of the present invention is to provide an electrical connection that prevents incomplete closing or incomplete engagement of the locking device due to installation errors. The object is solved through the features of patent claim number 1. The connection in accordance with the present invention includes a socket, a contact box which is complementary to the socket and a transverse latch to block the socket box in the contact box. At least one movable shoe engages at least one spring element which upon closing the bolt applies an increasing tension on the latch and pushes it back towards its open position in the case of an incomplete closing process. Only in the case of a complete closure the latch is locked in its closed position. The collaboration according to the present invention between the latch, the spring element and the slide causes the electrical connection or its locking device to always be in a defined state, and this state is visible without any possibility of confusion on the part of the user. installer In the case of only incomplete penetration of the latch, a force is applied to the bolt by the coupling of the slide with the bolt through the spring element which, after the suspension of the manual thrust force, automatically returns it to its position open In this way the installer is told that the locking device is not engaged and therefore can not fulfill its assurance function. A further feature of the present invention is that when the latch is inserted, the two main connection parts, ie the socket which is fixed to the wall of a frame and the contact box, are tensioned, which is reached through the form of guides in the latch to receive pins in the plug box. This opens up the advantageous possibility of making the connection between the electrical contacts of the plug part and the electrical contacts of the contact part only by inserting the latch. With the single connection of the boxes (plug box, contact box) and with the latch being in the open position, there is no electrical connection between the contacts. On the basis of the recoil force of the spring element the latch is placed in two defined positions, it is say the open position or the closed position. The shape of the guide groove has the effect that both boxes close in the case of insertion of the latch or separate in the case of separation of the latch. In the same way the electrical contact of the main parts is carried out in the case of the insertion of the latch or it is canceled in the case of the separation of the latch. Therefore there is a direct relationship between the position of the latch and the electrical connection of the corresponding electrical contacts of the main parts. Thus, in the closed position, the contacts are connected to each other and in the open position said contacts are separated. Now if a current passes through the connection, this represents at the same time a confirmation of a totally closed latch.

Preferred embodiments of the present invention are provided in the subclaims. Next, a preferred embodiment of the connection according to the present invention is described in detail with respect to the following drawings in which: Figure 1 shows the main parts of a connection with a front view in perspective of the contact box and from the socket; Figure 2 shows a latch in the form of a stirrup in perspective; Figure 3 is a perspective representation of a latch arm according to Figure 2 without a sledge; Figures 4a, 4b are a top view and a bottom view, respectively, of the latch, in perspective; Figure 5 shows an enlarged perspective view of the arms partially cut with skids; Figures 6a-6c depict the contact box with the latch in various positions and Figures 7a-7d depict the operation of a tongue mode. The electrical connection shown in Figure 1 is conceived as what is known as transmission wiring and consists of a pin part I fixed in an opening in the wall of a vehicle and a contact part II inserted in this pin part, elaborated in accordance with the present invention and fully described below. The contact part II contains a contact box 1 with a front part 2 in the form of a ring, in which a contact attachment 3 in the form of a disc is integrated and the external part has a profile ring 4. A locking device for retaining the contact box 1 in the plug housing of the plug part I is a latch 5 in the form of a stirrup with two arms 6, 7. In the relatively angular rear part 8 of the bolt 5 there is a C-shaped stirrup 9 whose arms 10, 11 move on both arms 6, 7 and parallel to these two arms 6, 7 and on their regular internal side each have a guide groove 12 where the arms 10, 11 are brought towards two parallel guides formed in the contact housing 1 42, 43 transversely with respect to the plug axis. As can be seen in particular from FIGS. 2 and 3, each arm 6, 7 has two lateral walls 21, 22 parallel with respect to the direction of the bolt, which together with a transverse wall 23 limit an elongated recess 13, 14. In the inner end wall 24 of each recess 13, 14 there is an axial pin 15, 16 and in the two side walls 21, 22 there are perforations 17, 18 in which a tongue 19, 20 protrudes in each one of them. an oblique surface. Each arm 6, 7 of the latch 5 corresponds to a skate 25 shown in figures 4a, 4b. Each skate 25 has an essentially rectangular elongated base plate 26, in which a support plate 27 perpendicular with a spike 28 parallel to the base plate 26 is formed at one end. Parallel to both sides of the plate base 26 are projecting pins 30, 31 attached at the end side to the end portion 29 of the base plate 26. On each pin 30, 31 is a cutout 32, 33 limited at one end by an oblique surface 34 , 35 and at the other end by a perpendicular surface 36, 37. The lower sides of the base plate 26. and the pins 30, 31 lie in the same plane. In figure 5 there is shown an arm 6 of the latch 5 according to figure 3 together with an integrated shoe 25 according to figures 4a, 4b without extension spring. The skate 25 is in an end position where its support plate 27 is in the transverse end wall 23 of the arm 6. The width of the skate 25 corresponds to the width of the arm 6 such that both deformable pins elastically in the form of tongues 30, 31 are opposite the tongues 19, 20 projecting through the openings 17, 18. The upper side of the supporting plate 27 is aligned with the upper side of the wall 21 to 24 of the 6. The height of the pins 3031 of the skid 25 is smaller than the height of the support plate 27 such that the upper part of the pins 30, 31 can slide in the front area 21a, 22a of the side walls 21, 22. The width of the side walls 21, 22 corresponds to the width of the pins 30, 31. The middle area 21b, 22b of the side walls 21, 22 has the aforementioned holes 17, 18 for receiving the pins 30, 31 in such a way that the height of the middle zone 21b, 22b is smaller than the height of the front zone 21a, 22a. To this middle zone 21b, 22b follows the rear area 21c, 22c of the side walls 21, 22, in such a way that the lower sides of the pins 30, 31, the tabs 19, 20 and the rear areas 21c, 22c of the side walls 21, 22 are in the same plane. Figures 6a to 6c show the rear side of the contact box 1 with a latch 5 in various positions, two integrated runners 25 and two extension springs 40, 41, which are placed in a recess 13, 14 of the arm 6, 7 and stretched between the spigot 28 and the axial pins 15, 16. As can be seen especially from FIGS. 7a to 7b which represent a cross section along the line AA shown by way of example in FIG. 6c, the upper side of the side walls 21, 22 of the arms 6, 7 is carried through the guide rails 44, 45 formed in the contact box 1. It will further be noted that the height of the end wall 24 is smaller than the height of the rear area 21c of the side wall 21, whereby the base plate 26 when actuating the latch 5 can slide under this end wall 24. Also on the rear side of the contact box 1 for each cut-out 32, 33 of skate 25 a support nose is formed 48 which is limited at one end by an oblique surface 49 and at the other end by a perpendicular surface 50. Next, the operation of the latch 5 according to figures 2, 3, of the slide 25 according to the figures will be explained. 4a, 4b and the contact box II according to figure 1 with the help of figures 6 and 7. Figure 6a shows the latch 5 in the open position, in the state in which the installer receives the contact box I before insertion, and Figure 7a is a cross-sectional representation corresponding to Figure 6a. In this open position the support plate 27 is against the transverse wall 23. In the cutout 33 of the pin 31 there is the support nose 48 of the contact housing 1. The underside of the pin 31 rests on the rear side of the contact box 1. The distance between the support plate 27 and the end plate 24 is at its maximum in this position, in such a way that the extension spring 41 is relaxed. Now on the front side of the contact part II the corresponding pin part I is inserted (see figure 1). To block the connection the installer must press the latch 5 in the direction of the arrow G. From this the upper side of the side walls 21, 22 is carried by the guide rails 44, 45. As can be seen especially from of figure 7a, the lower side of the front area 21a of the side wall 21 slides on the upper part of the pin 31. The shoe 25 does not change position, since the supporting nose 48 keeps the pin 31 firm. The end wall 24 slides in the base plate 26. The distance between the support plate 27 and the end plate 24 becomes smaller, that is, the extension spring 41 is being tensioned. The support elements not illustrated of the latch 5 and of the contact box 1 are engaged between them, when the latch 5 is fully inserted in the contact box 1, as shown in figure 6b, and figure 7b is a corresponding cross-sectional representation. The distance between the support plate 27 and the end plate 24 is the smallest. As a consequence, the force created by the extension spring 41 and applied against the end wall 24 is at its maximum level. If the non-illustrated support elements are placed in such a way as to resist this force, the latch 5 remains in the closed position, however with the drawback that the extension spring 41 is always in a taut condition. To avoid this undesired effect, the springs 41, 40 must be relaxed. As can be seen especially in FIG. 7a, the tongue 19 projects into the opening. As soon as the non-illustrated support elements are engaged, the oblique surface of the tongue 19 passes under the pin 31 (see FIG. 7b). The ramp 38 of the pin 31 facilitates the sliding of the tongue 19. In this way the pin 31 is raised on the nose support 48 in the hole 17 and is slightly elastically deformed. Since the latch 5, due to the non-illustrated support elements, is connected to the contact housing 1, the expansion spring 41 can be distended only if the slide 25 together with the pins 30, 31 moves in the direction of the transverse wall. 23. After passing the support wall 48, the pin 31 comes due to its elastic deformation back to the rear side of the contact box 1 (see figure 7c). It can also be considered that the force directed towards the rear side of the contact box 1 is created through rigid pins 30, 31 and a flexible support plate 26. In this case not illustrated the support plate 27 is raised and the pins 30, 31 are not deformed. Instead of this the support plate 26 is elastically deformed. After the pins 30, 31 have reached the rear part of the contact box 1, as also shown in figure 7c, they slide under the lower side of the front area 21a of the side walls 21 until they reach the plate support 27 against the transverse wall 23. Now the distance between the support plate 27 and the end plate 24 is again maximum, that is to say, the expansion spring 41 is in an unstressed state. This "non-tense" closed state is illustrated both in Figure 6c and Figure 7d. It should be noted that Figure 7c represents an intermediate position of Figure 7b, which is the cross-sectional representation of Figure 6b, and of Figure 7d, which is a cross-sectional representation of Figure 6c. None of the figures 6a to 6c represents the position of figure 7c. However, if the latch 5 is not fully inserted, that is before the non-illustrated support elements can be engaged, the extension spring 41 pushes the latch 5 back to its open position, since the slide 25 is connected with the latch 5. the support nose 48, as illustrated in figure 7a. It should also be noted that in the "non-taut" open position, the shoe 25 together with the support plate 27 is against the transverse wall 23, whereby the spring is slightly prestressed between the pin 27 and the axial pin 16. , such that a vibration of the skate 25 can be effectively avoided. Furthermore, the clearance between the guide rail 44 and the rear side of the contact box 1 is so small that a vibration of the side walls 21, 22 and of the pins 30, 31 can hardly occur. Upon opening the connection, so that the latch 5 is removed from the contact box 1, the latch 5 carries the slide 25 since the support plate 27 is against the transverse wall 23. As soon as the ramp 38 reaches the oblique surface 49, the pin 31 is raised on the supporting nose 48 in the hole 17. After overcoming the supporting nose 48 the ramp arrives in the cutout 33, as illustrated in figure 7a and 6a. The distance between the support plate and the end plate does not change when the connection is opened and is maximum. In this way the connection is ready for a new block. It should be noted that the above-described characteristics of the modalities can be combined with each other as desired.

Claims (10)

1. CLAIMS 1. An electrical connection with - a socket, - a contact box (1) complementary to the socket and - a transverse latch (5) to lock the socket on the contact box (1), characterized in that, at least one mobile shoe (25) engages at least one spring element (40, 41), which applies an increasing tension on the latch (5) when the latch (5) is closed and returns it in the case of an incomplete closing process towards its open position, and because only in the case of a total closing of the latch (5) said latch is locked in its closed position. A connection according to claim 1, characterized in that the latch (5) and one of the two boxes (1) have a pair of support elements that work in combination to block the connection in a closed position, and because the skate (25) has at least one pin (30, 31) that depends on a support nose (48) in such a way that when the latch (5) is pushed in the closing direction, a spring element (40, 41) attached at one end to the skate (25). A connection according to claim 2, characterized in that at least one tongue (19, 20) separates the connection between the pins (30, 31) and the nose (48) when it reaches the closing position of the latch (5), in such a way that the spring element (40, 41) is in an unstressed state. . A connection according to claim 2 or according to claim 3, characterized in that the support nose (48) is formed in one of the two boxes (1), because the other end of the spring element (40, 41). ) is connected to the latch (5) and because the tongue (19, 20) is formed on the latch (5). A connection according to at least one of the preceding claims, characterized in that the latch in the form of a stirrup (5) has at least two arms (6, 7) and the slide (25) can move in a recess (13, 14) of the latch (5). A connection according to at least one of the preceding claims, characterized in that the latch (5) has at least one axial pin (15, 16), with which one end of the spring element (40, 41) is connected . 7. A connection according to at least one of the preceding claims, characterized in that the shoe (25) has a pin (28) for the other end of the spring element (40, 41) and the pin (30, 31) has a cutout (32, 33) suitable for the supporting nose (48). A connection according to at least one of the preceding claims, characterized in that the bearing nose (48) is formed with an oblique surface (49) on the rear side of the contact box (1). A connection according to at least one of the preceding claims, characterized in that the arm (6, 7) of the latch (5) is transformed into two side walls (21, 22), so that the slide (25) is it arranges in a mobile manner between these two side walls (21, 22). A connection according to at least one of the preceding claims, characterized in that the side walls (21, 22) have at least one tongue in the locking direction (19, 20), such that at least one pin (30) , 31) of the skate (25) can be raised above the supporting nose (48), where the side wall (21, 22) in the vicinity of the tongue (19, 20) has at least one additional hole (17), that receives the pin (30, 31) when it rises,