Mains power supply plug.

State of the art

The invention relates to a power cable plug-in connector according to the preamble of claim 1.

In electrical appliances, it's known for making the electrical connection from the AC outlet from the device a jammed inside which and deduce corresponding electrically-contacting cable, usually adjacent to the exit point by a grommet or something similar reinforced or to provide the device with a connecting socket, in which the connector of a power cord can be introduced. For use in conjunction with power tools, particularly hand-held power tools such as a hand drill, screwdrivers, jig saw, etc.. is the latter option rarely, because in the usually rough operation of the power cord plug from the socket may slip on the device, either caused by the vibration or because the cable was held too tightly.

On the other hand, the combination of electric hand-held devices with a fixed power cord often significant problems, because it is common for the power cord after use to wrap around the machine and store so reasonably, because otherwise with the filing of the tool especially when there are other tools at the same place are, the power cord can become entangled with each other and a loosely lying around power cord disturbs and can also be damaged.

By wrapping but arises the need to immediately strongly kinking the power cord at the outlet from the device, which leads with frequent use, the power cord, either in the area of ​​the spout or directly behind the spout when it is reinforced by a provision brittle will and problems not only the electrical contact with the device, but also safety problems can arise if, for example, exposed the phase lead.

It is then very inconvenient necessary to screw the whole machine to arrange the cable connection on the device again properly can, for example, by shortening the cable, the damaged region - such dismantling are particularly very expensive if it is the electrical device to a half-shell system is.

The invention is therefore based on the object to provide for the electrical connection connections between any electrical device, in particular an electric tool or electric hand tool a network cable connection, which is safe and immovably held positively on the device into which it is introduced, is simple and straightforward and can also be opened and repaired if damaged, so that it is not necessary, the entire network cable connection, as with welded connecting parts inevitable to have to dispose of.

ADVANTAGES OF THE INVENTION

The invention solves this problem with the features of claim 1 and has the advantage that the plug is securely and immovably held in the receiving socket which is usually located on the device, due to positive locking catches, which are preferably present on both connector sides.

Nevertheless, a slight loosening of the plug from the power socket is possible by handle portions formed by latching wings are compressed by manually pressing, thereby locking shoulders are released from locking recesses in the receiving socket and the plug can be removed easily.

For this manipulation a hand operation is possible because the latching wings opposite one another on the plug, detected for example by the thumb and forefinger on both sides and each other can be pressed shut, resulting in a release of the locking connection of the plug in the socket.

A further advantage is that the connector per se is completely dismantled, so that an easy replacement or repair is possible, without, as in welded connections otherwise necessary, the cable because inextricably connected to the plug-in connections, must be discarded, or any, is connected to commercially available plug to the shortened cable, which some technical skill requires.

The invention therefore enables the reuse of just consuming power tools because of the required good insulation and also costly cable, when in fact it should lead to a malfunction or damage to the terminal portion of the plug.

A further advantage is that there is always an excellent contact-making is ensured since blade contacts are used which cause cleaning of the contacts due to the resilient pressing action when pushed.

Aside from the separately to the cable terminals to be connected to electrical contacts (male contacts), the entire plug from only five parts which including the hose connector that can be mounted easily.

It is still of particular advantage that the two sided spring blades are fixed as the last assembly step the plug and are spread apart by spring pressure from the plug, using a common compression spring for both locking wings is used.

The structure of the plug is therefore of particular importance in such a power cord plug connection, while the female receptacle, usually located on the device - but it is also conceivable to arrange the receiving socket on the cable and the connector on the device, if desired - of rather simple construction and in parts of the housing may be formed in each case with the cable connection to be connected to the power tool as a cavity.

This cavity then has inner contours of the outer shape of the plug corresponding complementary so that it can be inserted easily into the socket at the same time, the electrical contact is made by penetration of existing on the connector panel reeds in small metal receptacle sockets on the plug. These sockets in the connector may be of commercial construction and forming blade contacts by spring successive zugepreßte sided metal reeds, between the tongues of the device socket are introduced.

The measures specified in the dependent claims, advantageous refinements and improvements of the invention are possible. Particularly advantageous is an additional configuration which is that for ease of assembly interlocking mating parts in the form of projecting ribs or corresponding complementary grooves are provided on the two connector parts, which complement each other to ensure proper fit, with an initial centering is thereby possible, that a projecting pipe stub on one of the connector parts in a larger projecting pipe stub at the other connector part engages flush, which is the immediate real tive orientation of the two connector parts secured to each other without longer try and is further formed by the two successive directed pipe stubs a through hole in the plug, which the receiving a compression spring is used, the effect on both sides of the inside of the then still with the assembled base connector elements by a simple screw in between set pressure spring mounted two latching wings acting then.

drawing

Embodiments of the invention are shown in the drawing and are explained in the following description. Show it:<dl id="dl0001"><dt>Fig. 1</dt><dd>a plan view of the plug, from which also the facing resilient locking wing is recognizable;</dd><dt>FIG. 2</dt><dd>a side view of the connector of Figure 1 with both sides indicated latching wings.</dd><dt>Fig. 3</dt><dd>a presentation of Figure 1 similar plan view with taken away upper plug part and on that outside adjoining latching wings.</dd><dt>Fig. 4</dt><dd>a section along the line IV-IV of Fig. 3;</dd><dt>Fig. 5</dt><dd>a section along the line VV de r Fig. 3;</dd><dt>Fig. 6</dt><dd>a section along the line VI-VI of Fig. 3;</dd><dt>Fig. 7</dt><dd>a section along the line VII-VII of Fig. 3 and</dd><dt>Fig. 8</dt><dd>a section along the line VIII-VIII of Fig. 3; finally show</dd><dt>Fig. 9</dt><dd>a view of the connector of Fig. 1 from the front and</dd><dt>Fig. 10</dt><dd>only one of the possible embodiments of a receiving socket for the plug of FIG. 1 to 9, preferably on the respective electrical appliance.</dd></dl>

Description of Embodiments

The basic idea of ​​the present invention is to provide a removable, so screwed and thus environmentally friendly plug with outer resilient catch opportunities specifically for an electric hand tool, which engages with cams in the housing of the power tool, through the latching receives a secure form-fitting seat and just as easily released again may, by two opposing latching wings are zugepreßt the plug spring successively by one-handed operation, which come free projecting locking shoulders of locking recesses on the connector panel and the plug can be pulled out.

Structure and basic shape of the plug 10 is best seen from the representation of Fig. 4; the plug comprises two plug main parts, namely a hereinafter referred to as the basic male part first half 11 and a top plug part 12, which is viewed in FIG. 3 with removed cover plug part 12 to the bottom of the plug part 11.

are connected to the assembled two plug halves, such as best illustrated in FIGS. 1, blank 2 and 4 seen laterally outward latching wings 13a, 13b attached, in which of each connector half part respectively recesses 14a, 14b are formed in the front portion (also see FIG. 5 in , 15b of each locking wing are inserted and held by mutual interengaging projecting ribs and recesses connection with FIG. 4), in which front, inside, so directed towards each other in the assembled state approaches 15a. Such engaging in recesses on each locking wing base 15 ribs are designated in FIG. 5 at 16.

The construction of the connector is completed by an attached at the rear of the connector sleeve 17 or extension that finds its anchor by a Ringausausnehmung 17a in its front portion in the plug, in which of the two outgoing projecting semi-annular shoulders 18a, 18b, is here to full circle complement and spout clinging to penetrate.

If you look therefore of the identifiable well in FIG. 3 electrical leads with the arranged on their ends small metallic mounting bushes 19a, 19b from which the blade contacts forming preferably in its rear region with those foreseen here two electrical leads 20a, 20b by crimping or pressing are connected, the connector comprises a total of five parts, namely the two connector halves 13a, 13b, the rear sleeve 17 and the two laterally positioned detent arms 13a and 13b.

The connection of the two connector halves is effected in that on one of the halves, preferably in the visible in FIG. 3 plots the plug part 11 are provided approximately axially extending projections 21 in the edge region, which (see also Figs. 5 and 6) into corresponding longitudinal grooves 22 deck plug part 12 engage. It is understood that any, each interlocking connection options can be provided here.

A particularly advantageous variant consists in the fact that to the initial orientation and at the same time to form a leading through both connector halves bore 23 (Fig. 4) the inclusion of a compression spring 24 acts, at one of the connector halves, preferably at the base connector part 11, a central raised tubular ring projection 25 is formed in a narrower in diameter ring projection 26 of the other connector part half so engages the cover portion 12, so that these two parts engage telescopically and simultaneously form a bilaterally outwardly open Durchtritts- and receiving bore for the compression spring 24, then both sides as best illustrated in FIGS. 4, acting on the recognized at the connector halves latching wings 13a, 13b and this seeks be strained to the outside due to their spring force. For this purpose, the spring ends received inside 27 on the latching wings 13a, 13b in the cup-like receiving recesses.

The mounting of such a plug is then carried out so that first the two electrical leads 20a, 20b of the 17 out through the spout cable 20 the two receiving sockets are connected by soldering, crimping or any other type of connection, wherein the socket 19b particularly well in Fig. 8 can be seen and two resiliently clenched, is in the rear part integrally interconnected metallic contact surfaces 28th These contact surfaces 28 are bent forward, so that even with slight misorientation in Fig. 10 only schematically indicated contact tongues 21 of a female receptacle shown there 30 can easily penetrate the plug and through the constant spring force of the contact surfaces excellent contact on the type of blade contacts results.

Subsequently, the metallic mounting bushes 19a, 19b shown in the base connector part 11 as shown in Fig. 3, inserted to give guidance and support functions result in the receiving area, for example, by a lateral projection 29 is received by a correspondingly shaped lateral receiving opening 30 of the base connector part housing and simultaneously by the tubular shape 25 of the central passage opening gives an opposing stop in 31 for the respective receiving sleeve 19a, 19b. This is achieved a pre-fixing of the metallic recording or contact bushes 19a, 19b in the base connector part 11, which are finally fixed by connecting the two connector halves by each successive trimmed transverse ribs 31 on one or both connector halves, securing the loaded contact sockets. In this case, also inwardly directed projections in the area of ​​the still emergent within the plug end of the cable 32 are provided so that this is clamped in the connector, when the two connector halves are bolted to one another, as best seen in FIG. 7 can be removed from the the two clamping projections 33 are clearly visible, which serve the clamping and compression of the cable end 32 and form a squashed oval shape 34 for the passage of the cable end 32nd

The connection of the two connector halves is therefore using two screws 35, as shown in FIG. 7, which are formed by aligned openings 36 in the rear part of the two connector halves and also interpenetration partly again telescopically, as also Fig. 7 shows the complete orientation and hold the two connector halves.

Only after the installation has progressed while clamping also the sleeve 17 with its annular projection 36, the two latching wings with their front approaches from both sides of the bolted-together connector halves 11, 12 set after the compression spring 24 still inserted into the bore 23 has been.

penetrates Even when the connector halves, as shown in FIG. 4, a tubular projection 37 on the locking arms 13a to the passage end of the held preferably oval or approximately rectangular opening 38 in the two plug halves (see Fig. 3) before, so that it is easy, then still to be completed by the other side of a screw 39 and the two catch arms 13a, 13b by anchoring their front projections or tabs 15a, 15b and connect with each other simultaneously with the associated connector part halves. The compression spring straddles 24 the latching arms 13a, 13b apart, so that of these formed on both sides locking projections 40 farther apart than corresponding recesses 41 which are formed by the corresponding receptacle inner wall at the respective device socket and the only representative in Fig. 10 are indicated for all possible embodiments. Therefore, if in this way fully assembled connector, as it shows the. Figures 1 and 2, is inserted into the socket 30 of FIG. 10, the laterally splayed by the pressure of the spring 24 locking arms 13a, 13b are pressed together until the lugs incident or locking shoulders 40 into corresponding locking recesses 41 of the receiving sleeve 30 is caused by the expansion pressure of the compression spring 24 and engage behind this. In this way, the plug 10 is plugged into a receiving socket 30 and is no longer to release under the roughest of treatment, and even then not, when accidentally an inward pressure is exerted on one of the latching wings. Only when a hand of the operator a respective inwardly, ie towards each other directed pressure is applied to the two gripping surfaces 42 of the latching wings, for example, thumb and index finger, can the locking wing to the small distance that the locking lugs or locking shoulders need 40 to get out the recesses 41 of the receiving sleeve to get free 30, squeezing, whereupon the plug can be pulled out easily while simultaneously disconnecting the electrical contact connections from the plug socket. The contact tongues 29 of the socket then slide from inside the female electric contact with constantly exerted by the contact surfaces 28 spring pressure out until they also come free.

It is understood that the interconnected connector halves 11 and 12 to the half form forward each half recesses which combine to form a rectangular respective Gesamtdurchtrittsausnehmung 43 through which the contact tongues 29 pass to 19b received by the underlying metallic mounting bushes 19a, ( Fig. 9).

Finally, it is noted that the claims and in particular the main claim are attempts formulation of the invention without extensive knowledge of the prior art and therefore without restrictive precedent. Therefore, it is reserved, all lay down in the specification, both individually view the claims and the drawing illustrated per se or in any combination as essential to the invention and in the claims.