JP2695363B2 - Plug bridge for electrical appliance plugs with a pair of conductive pins and possibly protective conductor pins - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plug bridge of a plug for an electric product for connecting to an electric device, the plug being connected to a terminal of a connecting cable for the electric product.
Also, they are formed as a unit by injection-molded plug bridges around them in the injection mold, which plug bridges are formed from a shape-stable insulator for accommodating and fixing the conductive pins, and the contact pins They engage in the cut-outs of the insulator corresponding to their cross section, the contact pins projecting sufficiently, on the one hand, against the plug bridge and the plug to be plugged into the outlet, and on the other hand. A connecting pin that is connected to the connecting cable of the device, is located inside the contour of the plug, and protrudes opposite the face of the plug bridge, and is connected to the corresponding conductor connecting part of the conductor cable. Two-pole and three-pole plugs for electrical appliances, in which the conductor connection is fixed to the contact pins by a thermal bonding method, for example by welding or soldering, especially household About Plug bridge bipolar and tripolar plug appliances for connecting the equipment to an outlet of the AC electricity.

[0002]

2. Description of the Related Art Such a plug bridge or plug is a bipolar plug having a pair of conductive pins (hereinafter referred to as contact pins) on the one hand, and a pair of contact pins and a protective conductor pin (hereinafter referred to as a ground pin) on the other hand. Known as a three-pole plug. In this case, the ground pin is formed prior to the contact pin.

The electrical safety of plugs is of paramount importance. For this reason, today's plugs consist of a plug-molded body or an injection-molded plug body, the electrical connection between the connection cable for the equipment connected to the inside of this plug body and the connection pin or the insertion pin of the socket. Various joints are encapsulated and encapsulated. The above-mentioned electrical safety is achieved by the fact that the electrical connection is absolutely strong and sealed inside the plug with respect to the outside. That is, the connection cable must be constructed so that it cannot be pulled out under any condition, and even one of the single wires of the conductor connection of the connection cable extends out, for example, from the contour of the plug. must not. However, to the same extent, the connecting pins for the conductor connection of the connecting cable that are present inside the plug must be reliably insulated from one another and must remain after the device plug has been manufactured. .

According to the known technology, the conductor connections of the connecting cable are introduced into hollow complementary connecting pins, possibly via so-called funnel-shaped inlets. The connecting pin is then crushed so that the conductor connection fits tightly to the connecting pin. This crimping technique is widely applied and its results are guaranteed.

[0005]

The problem underlying the present invention is to provide an improved plug bridge of the type described at the outset, which is constructed in a conventional coupling manner for the conductor connections and connecting pins. It is to be.

[0006]

According to the invention, the above-mentioned object is achieved for the conductor connection to be fixed of the connecting cable, parallel to the plane of the contact pin formed in the insulator as a flat pin. Introducing passages, each of which widens conically with respect to one central line and projects from the surface of the insulator, are formed from at least the longitudinal side of the insulator, the dimension of the height of the introducing passage being It is set to correspond to the length of the non-insulating part of the conductor connection, and the contact pin consists of a homogeneous flat bar and lies inside the contour of the plug of this flat bar. The connecting pin is formed as an abutment pin which is swiveled by 90 ° with respect to the face of the flat pin for the joined conductor connection of the connecting cable, the flat profile being on the narrow side of the abutment pin. Depending on the height, it works as a rotating part for 90 ° turning. A plug bridge of a two-pole plug for electrical products, which has one undercut portion for each,
An insulator in the region of the T-shaped central web is formed with a collar protruding from the surface of this blunt body to belong to the protruding surface of the circular pin, and a T-shaped lateral web. Parallel to the plane of the contact pin, which is formed as a flat pin, in the region of the cone, diverges conically with respect to the center line for the conductor connection to be fixed of the conductor and projects from the plane of the insulator. One of each of the introduction channels is formed from the side surface of the T-shaped central web, the height dimensions of the introduction channel and the collar being such that the length of the conductor-connection-free part is The contact pins are made of homogeneous flat material, and the connecting pins present inside the contour of the plug of this flat material are for the combined conductor connection of the connecting cable. Swivel by 90 ° with respect to the flat pin surface of Crossovers), the flats being provided on the narrow side with one undercut which serves as a rotary part for swiveling 90 ° corresponding to the height of the abutment pin. Solved by, with a three-pole plug plug bridge for electrical products.

A known funnel-shaped inlet is provided to supplement this arrangement according to the invention. In order to ensure electrical safety, the insulator is molded with one wall each projecting from its surface, which wall catches the possibly projecting single wire of the conductor connection. Special features relating to the flat or round pin are described in claims 3-8. Similarly, the construction of the funnel-shaped inlet that can be additionally provided is described in claims 9 to 11.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the embodiments shown in the accompanying drawings. 1a, b, c, d and FIG.
The plug bridges 100 shown in a, b, c and d each essentially consist of a shape-stable insulator 1, 1'made of a hard-elastic compound. The shape, or outer shape, of this insulator is determined by the flat plate portion. In the case of a two-pole plug plug bridge (see FIGS. 1a, b, c, d), this flat plate part has a general or, in particular, rectangular basic shape. In the case of a three-pole plug-plug bridge (see FIGS. 2a, b, c, d), this flat plate portion has a general or especially T-shaped configuration.

According to the embodiment according to FIG. 1, the plug bridge comprises two metal pins 2, 3 inserted in an insulator 1. These two pins are plug bridge 100
It acts as a contact pin (current conductor or zero conductor) when the plug coming out of it is plugged into the socket. In the case of the illustrated embodiment, these metal pins 2 and 3 are (below) the insulator 1.
It is formed as a rectangular flat pin projecting from the side. On the second side of the insulation 1 these flat pins are for the conductor connection 6 according to the invention, which are soldered or welded according to the invention to the connecting cable of the electrical equipment (shown in phantom). It is formed so that it can be used as the connection pins 4 and 5. What can be fundamentally pointed out with respect to the flat pins is that these metal pins 2, 3 can be fitted in complementary complementary cuts in the insulator 1 in a form-integral configuration and can also be firmly connected to the tip of the insulator 1. That is possible. Complementary couplings 7 formed in the insulator 1 and in the respective pins 2 or 3 are essential for both coupling modes.

The construction described above is known per se from a strictly geometric point of view. The invention relates to a special design of the flat pins 2, 3 and the modification of the insulation 1 which is determined by this with respect to the connection with the conductor connection 6 of the connecting cable. The flat pins 2,3, as can be seen from FIGS. 3a, b, c, d, consist of a rectangular flat section 23 of essentially metal, which is a rectangular undercut 2 on both sides from the longitudinal side.
4 is provided. The dimensions of this undercut portion 24 are
This is set to connect to the surface of the insulator 1. This configuration has flat pins 2, 3 as shown in FIG. 3a.
Equivalent to the basic form of. Plug bridge 10 according to the invention
The undercut portion 2 of the flat-shaped member 23 for forming 0
The parts separated by 4 are swung (crossed) 90 ° with respect to each other as shown in a, b, c, d of FIG. 3 (see FIG. 3d), whereby the above-mentioned connecting pins 4, 5 are formed. .

The flat pins 2, 3 described with reference to FIG. 3 are either inserted into the insulation 1 in a known manner or injection-molded into this insulation. The swung or crossed portions of the flat pins 2 and 3, that is, the connection pins 4 and 5 are contact pins (or contact plates) of the conductor connection portion 6 (see especially the plan view shown in FIG. 1b). Serve as. For the sake of completeness, the crossed parts of the flat pins 2, 3 which act as connecting pins 4, 5 or abutment pins are rounded or at least chamfered at their free end faces. .

For ease of manufacture, that is to say for the reliable introduction and abutment of the conductor connection 6 on the connection pins 4, 5, they are flared conically on either side of each of these connection pins. One introduction path 9 is formed for each. Therefore, the insulator 1 is rotationally symmetrical in this respect. The introduction channel 9 rises from the surface of the insulator 1 and forms one protective wall 9'on this lateral side on the one hand and on the other hand in opposition to each other. The height of the protective wall 9'is set so as to correspond to the length of the non-insulated portion of the conductor connecting portion 6 to be joined.
If the solid wires of the conductor connection 6 are curved, these solid wires are reliably hidden between the protective walls 9 '.

The plug bridge 100 shown in FIG.
After the conductor connection 6 of the connection cable has been soldered or welded, the periphery is injection molded so that a plug body with contact pins 2, 3 protruding on one side is formed.
The plug bridge 100 'of the three-pole plug according to FIGS. 2a, b, c, d consists of a T-shaped insulator 1', which according to the known standardized arrangement has a triangular arrangement as a contact pin. In addition, as shown in FIG. 1, each metal pin 2, 3 as a flat pin and additionally a metal circular pin 30 as a ground pin are provided. The latter is longer than the former two. All three pins project from the insulator 1 such that they are sufficient to project into the socket in the case of injection molded plug bodies.

The two flat pins 2 ', 3'are shaped at their respective second (inner) ends in the same way as in the embodiment according to FIGS. 1 and 3, and are shown in the connecting cable (shown in phantom). The circular pin 30 forming the connecting pins 4 ', 5'for the conductor connecting part (current conductor) 6, the circular pin 30 for the ground connecting part 6'of the connecting cable has a groove formed on its peripheral surface. It is fitted tightly into the insulator 1 ′ via the part 31.

With respect to the problem underlying the invention, the circular pin 30 is provided at its (inner) end with a flat portion 32 on which the earth connection 6'of the connecting cable is provided.
Is soldered or welded. This flat portion 32
Is formed such that it faces the T-shaped transverse web of the insulator 1 '. Similar to the two-pole plug plug bridge 100 according to the embodiment of FIG. 1, the three-pole plug plug bridge 100 according to FIG. 2 for the connecting pins 4 ′, 5 ′ (ie the abutment plate) of the conductor connection is also provided. Each is provided with one conical inlet channel 33, and in this case only one inlet channel is provided on the side facing the ground connection 6 '. Attached to the earth pin or circular pin 30 is a two-part collar 34 adjacent to the T-shaped central web of the insulator 1 '. This color is
If the solid wire of the ground connection 6'is curved, it forms a protective wall.

A circular pin 30 of the type described by FIG.
In the embodiment according to FIG. 4, it has been described in two FIGS. 4a and 4b. From this circular pin 30, on the one hand, it is possible to see how the ground connection 6 ′ is soldered or welded to the flat 32. FIG. 4 particularly shows a configuration in which the circular pin 30 is coaxially perforated (see reference numeral 35 in FIG. 4a) in order to save material. Fundamentally, the circular pin 30 described above can also be formed by a rolled punched plate portion.

FIG. 5 shows a second embodiment of the circular pin 30 '. This circular pin consists of a circular pin which is not formed flat at the end (compared to FIG. 4). Rather, the circular pin 30 'is riveted to the L-shaped projection 36 on its end face side (see reference numeral 37 in FIG. 5). The inside of the L-shaped protrusion 36 and the ground connecting portion 6'are joined together.

The ground connection and the circular pin according to FIGS. 4 and 5 are further designed such that the perforation 35 is funnel-shaped in the direction of the free end and is therefore suitable for the introduction of the ground connection 6 '. Has been done. 6a, b, c and FIG.
1a, 1b and 1c show respective embodiments of the two-pole plug plug bridge 100 according to FIG. 1 or the three-pole plug plug bridge 100 according to FIG. Both plug bridges 100 or 100 ′ are similar to the plug bridges according to FIGS. 1 and 2 and have the same reference numerals as far as they are concerned.

Both plug bridges 100 according to FIGS. 1 and 2.
Alternatively, as a complement to 100 'or as a variant thereof, the inner terminals of the circular pin 30 for connecting with the connecting pins 4, 5 or 4', 5'for the conductor connecting part 6 and the earth connecting part 6 '. One conical funnel-shaped introduction part 5 at the front
0 is provided by this, when the conductor connection 6 or in some cases the ground connection 6'is introduced,
The cable cores are reliably guided along the abutment surfaces of these connections.

In the embodiment according to FIGS. 6a, 6b, 6c,
Both funnel-shaped introduction parts 50 are integrated in a common bridge-shaped molding material 51. This molding material 51 has both connecting pins 4,
5 are provided so as to face each other, and in the illustrated embodiment, they are inserted into the locking pin 52 in a shape-integral manner and in a mechanically integral manner. The locking pin 52 is molded on the insulator 1 and penetrates the molding material 51. The locking pin 52 and the molding material 51 are formed so as to complement each other so that the molding material 51 is firmly placed on the locking pin 52 and is securely held during injection molding of the plug body. .

In the embodiment according to FIG. 7, the conductor connecting portion 6
For connecting the connection pins 4 ', 5'and the ground connection 6'for all three funnel-shaped introductions 50 in common,
For example, they are collected in a T-shaped molding material 53. This molding material 53 is composed of connecting pins 4 ', 5'and circular pin 30'
Is provided opposite to the inner end of the. Similar to the embodiment according to FIG. 6, this molding 53 is engaged with one, in particular two, locking pins 52 and is held in shape and mechanically in one piece. The locking pin 52 is molded on the insulator 1 '. Both parts, that is, the molding material 53 and the locking pin 52, are formed so as to partially complement each other, so that the molding material 53 is firmly connected to the insulator 1 '.

[0022]

The plug bridge for two-pole and three-pole plugs for electric appliances according to the invention improves the coupling between the conductor connection and the connection pin, and under what conditions the connection cable is connected. Even if it is present, it cannot be pulled out, and since the single wire of the connecting cable is surely hidden between the protective walls of the insulator, the connecting pins for the conductor connecting portions of the respective connecting cables are surely insulated from each other.

[Brief description of the drawings]

1 shows three cross-sections of a plug bridge of a two-pole plug.

FIG. 2 is three sectional views of a plug bridge of a three-pole plug.

FIG. 3 is a basic view and a functional diagram of a crossed abutment pin, as seen from the manufacturing technique of the flat pin according to FIGS. 1 and 1 for forming a contact pin.

4 is two views of the circular pin according to FIG. 2 for forming a ground.

5 shows a second embodiment of the circular pin according to FIG.

6 shows three views of the plug bridge of the bipolar plug according to FIG. 1 with an additional molding material for forming a funnel-shaped introduction.

7 shows three views of a plug bridge of the three-pole plug according to FIG. 2 with additional molding material for forming a funnel-shaped introduction.

[Explanation of symbols]

 1 Insulator 1'Insulator 2,3,2 ', 3' Flat pin 4 ', 5' Connecting pin 6 Conductor connecting part 7 Locking joint part 6'Connecting cable 9,33 Introducing part 9'Protective wall 23 Flat material 24 Undercut part 30, 30 'Circular pin 32 Flat part 35 Perforation 36 Extension part 50 Funnel-shaped introduction part 52 Locking pin 53 Molding material 100 Plug bridge (two poles) 100' Plug bridge (three poles)

Claims (11)

(57) [Claims] 1. A plug bridge of a two-pole plug for an electric product for connecting to an electric device, wherein the plug is connected to a terminal of a connection cable for the electric product, and the periphery is injection molded in an injection mold. Are formed as a unit by means of plug bridges, which are formed from a steady and stable insulator for accommodating and fixing the conductive pins, the contact pins being in the cuts of the insulator corresponding to their cross section. The contact pin, on the one hand, projects sufficiently far towards the plug bridge and the plug to be plugged into the outlet, on the other hand it is connected to the connecting cable of the device and Connection pins that are present inside and project relative to the surface of the plug bridge and that are connected to the corresponding conductor connection of the conductor cable. Bipolar plugs for electrical appliances, in particular in the form of rectangular shaped stable insulators for bipolar plugs, in which the conductor connection of the cable is fastened by means of a heat-bonding method with contact pins, for example welding or soldering, in particular In a plug bridge of a two-pole plug for electrical appliances for connecting household appliances to an AC outlet, parallel to the plane of the contact pins formed as flat pins (2,3) on the insulator (1) In addition, there is an introduction channel (9) which is conically flared with respect to each one center line for the conductor connection (6) to be fixed of the connection cable and which projects from the surface of the insulator (1). It is formed from at least the vertical side of the insulator (1), and the dimension of the height of the introduction path (9) is such that the length of the portion of the conductor connecting portion (6, 6 ') that does not have an insulating material. Is set according to the Consists of a homogeneous flat bar (23), the connecting pins (4, 5) lying inside the contour of the plug of this flat bar being a flat pin for the connected conductor connection (6) of the connecting cable. Formed as an abutment pin which is swiveled by 90 ° with respect to the plane of the
3) is 90 ° on the narrow side according to the height of the contact pin
Plug bridge for a two-pole plug for electrical appliances, characterized in that it comprises an undercut (24) each acting as a swivel rotary part. 2. A plug bridge of a three-pole plug for an electric appliance for connecting to an electric device, wherein the plug is connected to a terminal of a connection cable for an electric appliance, and the periphery of the plug is connected in an injection mold. It is formed as a unit by injection molded plug bridge,
This plug bridge is formed from a steady and stable insulator for accommodating and fixing the conductor pins as well as the protective conductor pins formed as circular pins, the contact pins as well as the grounding pins in the cuts of the insulator corresponding to their cross section. On the one hand, the contact pin and the grounding pin project sufficiently against the plug bridge and the plug to be plugged into the outlet on the one hand, and on the other hand they are connected with the connecting cable of the equipment and A connecting pin that lies inside the contour and projects relative to the surface of the plug bridge, is connected to the corresponding conductor connection of the conductor cable, and the conductor connection of the connection cable is Depending on the joining method, for example fixed by welding or soldering, a particularly stable T-shaped, stable shape for three-pole plugs. Area of the T-shaped central web in a plug bridge of a three-pole plug for appliances, in particular a three-pole plug for appliances for connecting household appliances to an outlet for alternating-current electricity, in the form of a body (1 ') Insulator inside (1 ')
The collar (34) protruding from the surface of the absolute body (1 ') is formed so as to belong to the protruding surface of the circular pin (30, 30'), and has a T-shaped lateral shape. In the region of the web, parallel to the plane of the contact pins formed as flat pins (2 ', 3'), conical with respect to the center line for the conductor connection (6) to be fixed of the conductor A lead-in channel (33) is formed from the side of the T-shaped central web, which is open to the outside and projects from the face of the insulator (1 '), the lead-in channel (33) and the collar The height dimension of (34) is set so as to correspond to the length of the conductor connecting portion (6, 6 ') which does not have the insulating material, and the contact pin has a uniform flat shape ( 23), the connecting pins (4, 5) existing inside the contour of the plug of this flat material are connected. Formed as an abutment pin which is swiveled (crossed) by 90 ° with respect to the plane of the flat pin for the connected conductor connection (6) of the connecting cable,
On the narrow side, the flat member (23) is provided with one undercut portion (24) each of which functions as a rotating portion of 90 ° turning corresponding to the height of the contact pin. Pole plug plug bridge. 3. A circular pin (3) forming an earth pin.
0) is provided with lateral flats (32) for abutting the ground conductor of the connecting cable at the end lying within the contour of its device plug (100 '). The plug bridge according to Item 2. 4. A circular pin (3) forming an earth pin.
0 ') has an L-shaped extension (36) on the end side which lies within the contour of the plug (100'), the L-shaped leg projecting parallel to the axis of this extension. Plug bridge according to claim 2 or 3, characterized in that it is adapted to be used as an abutment for a ground conductor (6 ') of a connecting cable. 5. An L-shaped extension (36) and a circular pin (3).
Plug bridge according to claim 4, characterized in that 0) is connected via a nut connection (37). 6. If hollow circular materials are used to form the circular pins (30, 30 '), the central parts of these circular materials are provided with perforations (35), or in some cases towards the free end face. Plug plug according to any one of claims 2 to 5, characterized in that it is conically expanded in 7. The flat pins (2, 3; 2 ', 3') and the insulators (1, 1 ') are provided with complementary locking joints (7). The plug bridge according to any one of 1 to 6. 8. A circular pin (30, 30 ') is retained in the insulator (1, 1') via a grooved portion (31).
Plug bridge according to any one of. 9. A conical funnel-shaped lead-in before the connection for the conductor connection (6) which is present inside the plug and, if appropriate, the ground connection (6 ') of the conductor cable. Plug bridge according to any one of the preceding claims, characterized in that a mouth (50) is provided. 10. The funnel-shaped inlet (50) of both connection pins (4, 5) is formed by a common bridge-shaped profile (51), and this profile (51) is an insulator (51). 10. Plug bridge according to claim 9, characterized in that it is integrally and mechanically integrated with the locking pin (52) projecting from 1). 11. A funnel-shaped inlet (50) for both conductor connections (6) and a ground connection (6 ') is formed by a common, in particular T-shaped profile (53). And the profile (53) is integrally and geometrically connected to at least one locking pin (52) projecting from the insulator (1 '). The plug bridge according to item 9.