FR2619277A1 - METHOD FOR THE ELECTRICAL CONNECTION OF SMALL ELECTRICAL HOUSEHOLD APPLIANCES AND DEVICE FOR CARRYING OUT SAID METHOD - Google Patents

Abstract

The invention relates to a method and a device for automating the installation and connection of the electrical connections of small electrical household appliances, such as, for example, coffee makers. During the manufacture of the various groups involved in an apparatus, the connection contacts 1, 2, 3 are formed such that, in the assembly condition of the groups, they open out into a contact plane 4 with which they are electrically connected. by means of electrically conductive, pasty, liquid, fusible or other materials.

Description

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  The present invention relates to a method of manufacturing small household electrical appliances, for example coffee makers or the like, in which the electrical connection of different groups of an appliance to each other is made inside the receiving appliance cavity. the electrical connections of the said groups, and it also concerns

  a device for implementing this method.

  In the group of many small electric appliances come for example mixers, stirrers, irons, broilers, sintering machines, mouthwashes, hair treatment devices, vacuum cleaners, waffle irons,

  kitchen machines, juice presses, centrifuges -

  runaway or the like. The invention relates to apparatus of this group. However in the following, to simplify, we will be more than electric coffee makers because this may represent in this respect a

  example of advantageous use. The process is, however,

  applicable to all small electrical household appliances in which it is necessary to perform in a cavity of the appliance, a connection of

several points of contact.

  It is known, during the manufacture of coffee makers, that is to say during the assembly of the various components in the form of a device, to set up in an area of the base initially

  groups and modules, for example a heater

  instantaneous water, the thermostat switch, the overheating safety, the on / off switches, the power supply terminals and the like, and then making the connections

  between the different points of contact.

  The groups in place are already partially provided with flexible electrical conductors plugged, called strands and which are connected with the second point of contact in the device, that is to say with the corresponding counter-contacts , often

  also in hard to reach places.

  Already in operations preceding this one, and corresponding to what is called the pre-assembly, all

  son parts were pre-treated individually-

  is lying. The wire elements have been lengthened, stripped and each provided, according to their use, to

  sheaths of ends of branches, cable sheaves or analogues.

  This complicated preparation is carried out using

semi-automatic devices.

  Also the final assembly of the device is

  performed manually, in which case specific groups

  such as the instantaneous water heater from another pre-assembly. are removed. Also in this case, mechanical components and electrical components are delivered by being partially connected and are assembled on the assembly line. All in all, manual wiring and difficult incorporation - as variable - groups are considered to require a lot of work. Fees

  pre-assembly and final assembly can be

  and represent, from the point of view of production, a significant proportion of manufacturing costs. To reduce these assembly costs, the workflows are combined in the following way: semi-automatic preparation of wire connections, manual pre-assembly of instantaneous water heaters, manual execution of electrical wiring and finally

  manual final assembly of the entire device.

  To improve these workflows,

  we have sought to automate further said operations.

  It was then necessary to carry out a fixed wiring of the groups.

  However, only a small proportion of the total cabling could be covered by the fixed cabling so that a fully automatic unwinding could not be achieved.

  of all operations. In addition, automatic

  the individual wires involved in the fixed wiring require a higher technical

  average, in equipment, without getting too close

  of the final goal of automation.

  The object of the invention is to create a method and a device by which the wiring of individual groups and their connections can be largely automated at little cost.

  in a small electric appliance.

  For this purpose, the method of the invention is characterized in thatthe connection contacts to be connected terminate, preferably in a common joint direction, in the surface area of a

  contact and are put in contact with electrical links

  cudgels. According to another particularity of the invention, the connection contacts cross the contact plane

  and are brought into contact with electrical connections.

  The result is that the wiring can be

  performed with contacts arranged in a plane.

  According to other features of the method, the electrical connections consist of a pasty or liquid conductive material and are deposited under

  this shape; electrical connections can also

  consist of a conductive material

  manufactured. The contact and the formation of the. Electrical connections are made simultaneously by depositing a conductive material, pasty or liquid. The contacting is carried out by depositing a pasty or liquid conductive material. This contacting can be performed

by compression or welding.

  According to still other particularities of the method, the electrical connecting conductors, consisting of electrically conductive materials of large surface area and of homogeneous or heterogeneous composition, are deposited in a pulverulent form following the desired conductive path and then these materials are subjected to a surface reduction; in this respect, several different materials are deposited separately

one from the other.

  The device for the implementation

  of the process according to the invention presents the

  the following: 1. The connection contacts include flat conductors and / or plugs which, due to their shape and size, penetrate and terminate

  in the surface area of the contact planes.

  2. The contact planes have passage openings placed in coincidence and corresponding to the positioning and the shape of the flat conductors

and / or cards.

  3. The surface, opposite to the groups, of the contact planes includes for the establishment of the circuit electrical connections which are each extended to the edge

passage openings.

  4. Before or after the placing of the contact plates in the electrical apparatus, the realization of the electrical connections, provided on the surface, is carried out by depot of an electrically

  conductive, pasty or liquid and hardenable.

  5. The deposit is made by means of a device

  automatic deposition controlled by program.

  6. The contact planes are arranged in the device

  after assembling the groups, the conductors

  flat and / or the cards being engaged practically

  by the combination of forms and practically

  outcrop in the through openings.

  7. The deposition of a conductive material, pasty or liquid, on the position of the passage opening of the individual electrical contact between the electrical connection, extending to the edge of the passage opening, and the flat conductor or the hired sheet

in this opening.

  8. The deposit of a pasty or liquid conductive material is performed on the position of the passage opening by means of an automatic deposition apparatus

ordered by program.

  9. The electrical connections on the contact plane consist of a preformed material, in which case sections of rectangular, square,

  circular, oval, polygonal or the like.

  10. The electrical contacts are made by punch-

  swimming, compression, riveting, fusion, welding or the like. 11. The contact planes additionally comprise one or more contact locations, which differed from the aforementioned contact areas with respect to the direction of joining and the contacting. 12. The contact plans are provided with grooves on the

  path of the electrical connections of the circuit.

  13. The contact surfaces are made by injection molding, deep drawing, sintering, cutting, punching, stamping, casting, milling, compression

or by a similar method.

  14. Raw materials for the manufacture of contact surfaces are plastics, resin, ceramics, glass, impregnated cardboard, deep drawing foil, hard rubber, clay mixtures, glass wool, rockwool, mica or other materials

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similar insulators.

  15. The contact planes are incorporated during their manufacture of the locations of contact and / or elements

  electrical functions, for example

  such, desselfs, fuses, thermo-breakers or the like. 16. The connection contacts ending in the

  area of the surface of a contact plane are connected

  by their ends arranged like conductive

  flatteners or cards, directly with

  prefabricated electrical connections.

In addition, there are other

  alternative embodiments of the present invention.

  Thus a disc made of a non-flammable or flame-resistant material can be engaged on the contact sheets of the parts to be connected. Drivers of

  provided between the contact cards are

  Initially killed from a powdery and flowable material, which is deposited in correspondence to the surface of the disk along the path of the desired linkage routes. To allow a clean deposit of this material, it is possible to use for the projection a suitable mask. The conductive materials may have granulometries between those of a granulate and a powder

  and they can have different spatial shapes.

  It can be envisaged that the subjects consist of ele-

  homogeneous elements, such as copper, tin, brass, aluminum, silver or others; they

  may however consist of heterogeneous materials

  genes, such as a mixture of copper and tin

  aluminum and tin, or the like.

  After the deposition of materials on the conductive paths on the surface of the disc, the materials resting freely on the tracks

  conductors are subject to surface reduction.

  The surface is reduced by heating effect; However, it is also possible to consider a surface reduction by sintering, by casting of an electrically conductive material and liquid solidifying after casting, such as solder tin, or the like. With regard to surface reduction, a decisive characteristic is that, in the case of surface reduction, the deposited materials exert, under the effect of the surface reduction, a protective action of structure and surface solidification. , so as to ensure good electrical conductivity of the deposited powdery materials. To obtain a clean profile of the conductive paths in powder form, the carrier plate

  in the form of a disc may comprise a superimposed structure

  which predetermines the profile of the conductive pathway

  this. In this structured surface, the conductive

  are put in place before they are submitted

  it's a surface reduction. To prevent damage to the disk-shaped carrier plate, the surface of the disk-shaped carrier plate can be

  covered by a mask during the reduction operation

  surface area. Through the mask, only predetermined conductive paths, consisting of conductive materials, are subject to surface reduction effects so that damage to the carrier plate can not occur. In this way, it is possible to manufacture the disk-shaped carrier plate of a thermoplastic material and, during the injection molding of this plastic material constituting the carrier plate, to achieve the desired conductive paths by groove-like recesses in the plate and to realize already the passage holes

  electrical contact plugs to be connected.

  According to the invention, already during the manufacture of the different groups, the ends of electrical connections of the various electrical contacts are prepared so that their connections after mounting in the base of the device all end in a plane. In this plane, the connections between the contacts are made in a completely automatic manner. In this regard, it is conceivable to achieve the connections by automatic means of wiring, brazing, gluing or the like. It is however also possible to use conductive plates and to connect them

  automatically to contacts. The safety of

  produced by the process according to the invention is considerably increased because mounting errors resulting from the human factor are suppressed and

  the connecting areas can not separate.

  Other features and advantages of the invention will be highlighted in the following

  the description given by way of non-limiting example,

  with reference to the accompanying drawings in which: Figure 1 shows a side elevational view of the device according to the invention; FIG. 2 represents the device in plan view; FIG. 3 represents another side elevational view of the device according to the invention, by highlighting the electrical connections; FIG. 4 represents a corresponding plan view which also allows evidence of electrical connections and contact areas Figures 5 and 6 show a variant of the process

according to the invention.

  In an area of the surface represented

  11 contacts 1 of groups 6 connected with

  ter, these connection contacts 1 can be made as flat conductors 2 and / or cards having

  different geometric shapes.

  All contacts 1 are oriented in the direction of junction "A". Their length is determined so that their ends open into the surface area of the contact plane 4, this contact plane 4 comprising, to facilitate

  inserting the contacts into the penetration positions

  crossing openings widening towards

  the bottom. These are adapted to the corresponding profile.

  laying contacts 1 (flat conductors 2 and / or plugs 3) so that they are arranged

  practically in conjugation of forms with

crossing 5 - or vice versa.

  During the implementation of the method according to the invention, a contact plane 4 is engaged on the large number of flat conductors 2

  and / or plugs 3, adjusting bosses

  unrepresented, planned on the edge of the plan of

  contact 4 exactly determining the engagement position

  is lying. The passage openings 5, widening downwards, facilitate the joining process, so that the desired operating step can also be performed.

  automatically. Stop bosses formed by injection

  the bottom plate, which are not shown, maintain the contact plane, the

  editing is completed, in its position.

  Figures 1 and 2 show

  By way of example, grooves 10 which receive the pasty or liquid conductive material. Figure 1 shows the grooves 10 in the partial sections A-B, C-D, E-F and G-H. Gorges 10 end

  respectively at the passage openings 5.

  By means of an automatic program-controlled deposition apparatus, the conductive, pasty or liquid material is deposited both in the grooves 10 and on the contact points 9 and, after

  hardening, all connections are complete.

  In an advantageous example of implementation of the method, the contact planes 4 are prepared in a preoperative step already in an automatic apparatus. In this case, the grooves 10 are filled with the pasty or liquid conductive material, as shown now in FIGS. 3 and 4. The contact points 9 have not yet been deposited. The contact plane 4 thus prefabricated, which has been implemented for example by means of a programmable robot or the like, is then put in place with its electrical connections 8 - in a position of the assembly line - in a household appliance corresponding, in which case the flat conductors 2 and the plugs 3 are engaged substantially with conjugation of shapes in the openings 5 of the contact planes 4. The aforementioned auxiliary means provided on the edge

  ensure a correct positioning of the contact plane 4.

  In a mounting line, the contact points 9 are simply deposited using an automatic device controlled by program (robot or positioning system along axes). During the subsequent transport on the assembly line, it is

  hardening of the initiating material

pasty and liquid.

  However, the contact planes 4 can be made in different ways, as defined in the preamble, and likewise the sequence of the operating steps can be modified at will. It is particularly advantageous to provide a standardized arrangement of the contact planes 4, in which case all the notches and passage openings necessary for a series of types are provided in the different positions and dimensions and in which case the specific configuration is obtained simply by means of the apparatus of

deposit ordered by program.

  In addition, in the implementation of the method according to the invention with the appropriate device, it will be possible to design - the "contact plane" as a purely geometrical structure and to put in place the prefabricated electrical connections 8 directly on the flat conductors 2 or the plugs 3 by fitting and / or by connection. In this respect, it is not necessary, for example, that the contact plan

  4 is in the form of a body, this depends on

  in particular conditions. As an explanation

  S5, Figures 5 and 6 show the same

  6, 6 ', 6 ", 6"') than in FIGS. 1 to 4. In addition, the electrical connections 8 shown in FIGS. 3 and 4 are again represented in this arrangement, but in this variant the "prefabricated" electrical connections 8 are installed and connected in a "self-supporting" manner in the form of

  bridges connecting a contact to one. other.

  The arrangement of the electrical connections 8 can also be in other forms of

  production. For example, it is possible to use

  thread sections or the like, in which case the ends are connected in correspondence with the flat conductors 2 and / or the plugs 3, for example by

soldering, brazing or spot welding.

  As shown by the existing representations, different possibilities of implementing the method are obtained and, as already mentioned, thanks to the invention,

  it is possible to automate the operating steps.

Claims (26)

  1. Small manufacturing process   household electrical appliances, eg coffee makers   or the like, wherein the electrical connection of different groups of an apparatus to one another is made within the apparatus cavity for receiving the electrical connections of said groups, characterized in that the connection contacts to connect end, preferably in a common joint direction "A", in the surface area of a contact plane and are brought into contact with electrical connections. 2. Method according to claim 1,   characterized in that the connection contacts traverse   feel the contact plan and are put in contact with electrical connections.   3. Method according to one of claims 1   or 2, characterized in that the electrical connections consist of a pasty conductive material or liquid that is deposited.   4. Process according to any one of   Claims 1 to 3, characterized in that the links   electrical devices consist of a prefabricated conductive material. 5. Process according to any one of   claims 1 to 4, characterized in that   in contact and the formation of the electrical connections are realized simultaneously by depositing a   pasty or liquid conductive material.   6. Method according to claim 1, characterized in that the placing in contact is carried out   depositing a pasty or liquid conductive material.   7. Process according to any one of   claims 1 to 4, characterized in that   in contact is made by compression.   8. Method according to one of the claims   1 and 2, characterized in that the setting contact is made by welding.   9. Process according to any one of   Claims 1 to 8, characterized in that the conductors   Electrical bonding devices, consisting of electrically conductive materials of large area and of homogeneous or heterogeneous composition, are deposited in a pulverulent form following the desired conductive path and then these materials are subjected to surface reduction.   10. Process according to claim 9, characterized in that several different materials   are deposited separately from each other.   11. Device for the implementation of the   process according to any one of claims 1 to 10,   characterized in that the connection contacts (1) comprise flat conductors (2) and / or plugs   (3) which, because of their shape and size,   penetrate and terminate in the surface area contact plans (4).   Device according to claim 11,   characterized in that the contact planes (4) comprise   opening openings (5) placed in line with each other.   dence and corresponding to the positioning and the form   flat conductors (2) and / or plugs (3).   13. Device according to claim 11 ,.   characterized in that the surface (7), opposite the groups (6), contact planes (4) comprises for the establishment of the circuit of the electrical connections   (8) each of which is extended to the edge of the openings passageways (5).   14. Device according to any one of   Claims 11 to 13, characterized in that, before or   after placing contact planes (4) in the electrical apparatus, the realization of the electrical connections (8) provided on the surface is performed by depositing an electrically conductive material, pasty or liquid and hardenable.   15. Device according to claim 14, characterized in that the defect is effected by means of a program-controlled automatic deposition apparatus. 16. Device according to claim 11, characterized in that the contact planes (4) are arranged in the electrical apparatus after assembling the groups (6), the flat conductors (2) and / or the plugs (3) being engaged practically by conjugation of   forms and almost outcrop in the passageways (5).   17. Device according to any one of   claims 11 to 16, characterized by depositing a   conductive material, pasty or liquid, on the posi-   the passage opening (5) of the individual electrical contact (9) between the electrical connection (8), extending to the edge of the passage opening (5), and the flat conductor (2) or card (3) engaged in this opening (5).   18. Device according to claim 17, characterized in that the deposition of a pasty or liquid conductive material is performed on the position of the passage opening (5) by means of a device   automatic deposition controlled by program.   19. Device according to any one of   claims 11 to 18, characterized   electrical connections (8) on the contact plane (4) consist of a preformed material, in which case sections of rectangular, square shapes are provided,   circular, oval, polygonal or the like.   20. Device according to any one of   claims 11 to 19, characterized in that the   electrical contacts (9) are made by punching,   compression, riveting, fusion, welding or the like.   21. Device according to any one of   Claims 11 to 20, characterized in that the plans   of contact (4) additionally comprise one or more contact locations, which differ from the above-mentioned contact areas with respect to the direction of contact. junction and bringing into contact.   22. Device according to any one of   claims 11 to 21, characterized in that the plans   (4) are provided with grooves (10) on the   path of the electrical connections (8) of the circuit.   23. Device according to any one of   Claims 11 to 22, characterized in that the plans   (4) are made by injection molding, deep drawing, sintering, cutting, punching, stamping, casting, milling, compression or by a analogous process.   24. Device according to any one of   claims 11 to 23, characterized in that, as   raw material for the manufacture of the contact planes (4), plastics, resin, ceramic, glass, impregnated cardboard, deep drawing sheet, hard rubber, clay mixtures, glass wool,   rock wool, mica or insulating   gists. 25. Device according to any one of   claims 11 to 24, characterized in that   contact surfaces (4) are incorporated during their manufacture into contact locations (9) and / or electrical functional elements, for example resistances,   fuses, thermometers or the like.   26. Device according to any one of   Claims 11 to 25, characterized in that the   connection contacts (1) terminating in the surface area of a contact plane are connected by their ends arranged as flat conductors (2) or followers (3) directly with electrical connections. prefabricated.