FR2624316A1 - ROTARY COLLECTOR FOR THE POWER SUPPLY OF THE ELECTRIC MOTOR OF CANVAS COILING DEVICES OR OTHER CLOSING MEMBER WITH INTEGRATED BACKUP MANEUVER - Google Patents

Abstract

The collector is formed by two insulating bodies (19, 22) which are profiled in order to be fitted together and which have stepped shoulders (19a, 22a) capable of forming bearing surfaces for corresponding metal discs (20, 23) connected to the conductors of the cables (21, 24) to be joined together. The transmission is performed by means of raised strips (20c) provided on at least one of the two discs which face each other.

Description

The present invention relates to electric winding devices

  closing stick, in particular in which the maneuvering of the fabric or other mobile obscuring member is carried out using a motor

  electric carried by a tubular frame mounted inside the drum itself

  bour on which is wound said organ.

  We know that in this type of device, it is in practice essential

  thinkable to foresee the possibility for the user to maneuver my-

  nuately the drum on the rise or the descent in the case where, as a result of any damage or a power cut, the operation

  Using the electric drive motor would be impossible.

  If in some constructions such an emergency operating mechanism can directly act on the external drum for emptying, in others, on the contrary, Said operation is integrated into the internal frame itself which it is therefore necessary to rotate to ensure the rotation of

aforementioned drum.

  Such a case has been illustrated schematically in FIG. 1 of

  drawing appended hereto. The reference 1 designates the envida-

  ge which is rotatably mounted around an axial frame 2, which contains

  All the organs of the device and, first of all, the electric motor

  plate 3 associated on the one hand with an automatic brake mechanism 4 and on the other hand with a speed reducer 5 whose output shaft carries The wheel 6 Linked to the internal wall of the drum 1. Opposite this wheel 6, the frame 2 is integral with a socket 7 which is free to rotate by

  compared to a cylindrical bearing surface provided Laterally on a green housing

  tical 8 in which are housed, in addition to the limit switch device (not visible in fig. 1), The manual drive system consisting of

  a hollow wheel 9 and a worm 10, which is driven in rotation

  tation using a ring 11 shaped to cooperate with a crank

  the removable. The horizontal shaft which carries the hollow wheel 9 is connected by a reduction mechanism epicycLo; dal to the bush 7, so that when the ring 11 is actuated angularly by the user as an emergency control, the frame 2 is Himself mime in rotation and, at

  through the reduction gear 5 provided irreversible, activates the drum 1.

  This construction is well known in practice and therefore does not require

  not a more detailed description. Suffice it to say that given

  of the rotation of the frame 2 during the emergency maneuver and of the obviously fixed character of the side casing 8, it is essential to provide, between the power cable 12 which penetrates inside said casing 8 and the capacitor 13 associated with the electric motor 3, a collector

  rotary which has been schematically represented in 14.

  Various types of rotary manifolds have been proposed for this purpose, but it should be emphasized that the localization inside the socket 7 complicates the mounting and connection operations. Furthermore and above all, known constructions do not have perfect reliability, whereas any damage implies for its repair.

  complicated disassembly and assembly operations.

  It is to these drawbacks that the present invention intends principally

  remedy, using a rotary construction manifold.

  tion, specially adapted to the particular problem to be solved.

  The rotary manifold according to the invention is essentially

  marked in that it is constituted by two insulating bodies male and female

  which are suitable for fitting one inside the other and whose facing walls have at least three stepped steps forming supports for annular metal discs arranged

  two by two and connected to two sets of electrical conductors, the con-

  connection between the facing discs being operated through at least one cambered blade integral with one of the discs so that a simple axial thrust exerted on one of the two insulating bodies

ensures the transmission of current.

  It is understood that in such a structure, the maintenance of the two insulating bodies does not require any fixing member since it suffices that the nested insulating bodies bear against axially fixed parts of the blind device. It is also understood that the operations of connecting the conductors to the annular discs are capable of being carried out in the workshop, the two bodies of the collector with their connections being simply fitted one in

  the other at the time of mounting in the frame.

  The appended drawing, given by way of example, will allow a better understanding of the invention, the characteristics which it presents and the advantages which it is capable of providing: As indicated above, FIG. 1 is a schematic axial section of a blind device with integrated emergency operation,

  capable of being fitted with a rotary manifold according to the invention.

  Fig. 2 is an axial section on a larger scale, illustrating the arrangement of such a rotary manifold and the mounting thereof

  inside the frame of the blind device.

  Fig. 3 illustrates in perspective The conformation of each of the

  two insulating bodies of the rotary collector according to fig. 2.

26 24 3 16

  In fig. 2, Reference 15 designates the shaft which carries the hollow wheel

  9-10 drive system enclosed by the side cover 8. The

  Free end of this shaft 15 has a toothing 15a forming a plane

  keep silent for the pinion sateLLites 16 of the epicycLoldaL mechanism interposed between the emergency operating mechanism and the frame 2. Each satellite pinion 16, mounted idly on an axis 17 carried by the sleeve 7, meshes with the internal toothing 18a of a ring 18 made crankcase solid

  8 in order to be immobilized angularly and thus allow The function-

  the epicycLoidaL 15a-16 mechanism mentioned above.

  On the shaft 15 is centered a first insulating body 19 with a substantially frustoconical profile and whose outer wall is profiled to present three stepped steps 19a, each of these forming a support

  for an annular disc 20 in beryllium bronze or other semi-metallic

  blable good conductor of Electricity.

  Fig. 3 shows clearly the arrangement of the body 19 and of each disc 20. It will be noted in particular that each step 19a has recesses 19b able to form housings for radial ears in projection 20a provided on the opening of the corresponding disc 20, which is thus angularly retained on its tier. Its retaining in the axial direction is ensured by small teeth 19c formed on the steps 19a and behind desqueLLes snap elastically The edge of

  The opening of the disc, as illustrated in fig. 2.

  As regards the electrical connections, it will be observed that the insulating body 19 is pierced longitudinally with three channels 19d which have been shown on the same longitudinal plane in FIG. 2, when in fact and as shown in fig. 3, for obvious reasons of convenience and thickness, said channels are angularly offset by one

  compared to the others, each of them opening on the one hand to the trans-

  large-diameter versal of the body 19, on the other hand at one of the three steps 19a. In each channel 19d is introduced one of the three conductors 21a which make up The cable 21 connected to the motor 3 through a

  Longitudinal passage 7a from douiLle 7; the end of each conduc-

  tor 21a is welded to the disc 20 corresponding to the level of an opening

  b made in one of the ears 20a of each disc.

  As more particularly shown in fig. 3, each disc 20 has, preferably at each of the three ears 20a, a blade 20c which is obtained by cutting and which is arched outwards in order to form a current collecting member, as shown in FIG.

will understand better below.

  The insulating body 19 thus formed and equipped, to which the qualifier "male" can be assigned, is associated with a hollow insulating body,

  consequently of the "female" type, which has been referenced 22 in the drawing.

  This body 22 is established at an internal diameter such that the body 19 is capable of coming to fit therein, and its internal wall has three

  stepped steps 22a corresponding to the three steps 19a above-mentioned.

  Each step 22a, provided with teeth 22d similar to those 19c of the steps 19a of the body 19, forms a support for a metal disc 23, also in beryllium bronze, provided with a lateral ear 23â suitable for engaging in one three longitudinal housings 22b provided for this purpose in the wall of the body 22. To each of these housings 22b corresponds a longitudinal channel 22c (fig. 2) for the passage of one of the conductors 12a of the cable 12 which comes from the casing lateral 8; in fig. 2 it has been assumed, for the sake of clarity of the drawing, that the channels 22c are arranged in the same longitudinal plane when in fact they are angularly offset with respect to each other, as appears in FIG. 3. The stripped end of each conductor 12a is soldered inside a perforation 23b made in the ear 23a

of the disc 23 which corresponds to it.

  It is understood that once the insulating bodies 19 and 22, equipped with their respective disks 20 and 23 themselves connected to the conductors 12a and 21a of the cables 12 and 21, have been fitted one into the other in the manner shown in fig. 2, the cambered blades 20c of the discs 20 resiliently bear against the discs 23, thereby transmitting the current regardless of the angular orientation

  reciprocal of the two bodies 19 and 22.

  The assembly of the rotary collector thus arranged is very simple since the wiring is capable of being carried out in the workshop on each of the bodies 19 or 22 which are then fitted and introduced in this state inside the blind device during assembly. of the constituent elements thereof inside the frame 2. As shown in

  fig. 2, the free transverse face of the body 19 comes to bear against

  be the heads projecting from the axes 17 of the planet gears 16, while

  that the free transverse face of the female body 22 comes to rest against

  be a fixed inner part 25, constituted in the case envisaged by a cylindrical lateral extension of the casing 8. The axial thrust thus determined causes the elastic deformation of the arched blades 20c and

  thus ensures the transmission of current. No other fixing or assembly

  blocking is not necessary, so that a simplification is obtained

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  notable assembly operations, to which is added a

  total reliability throughout the use of the awning device.

  It should also be observed that the plurality of cambered blades or contacts 20c ensures transmission of the current under excellent conditions, in particular with regard to the intensity capable of being transmitted.

  IT should also be understood that the above description does not

  has been given only by way of example and does not limit in any way the field of the invention from which we would not depart by replacing the

  execution details described by all other equivalents.

26243 16

RE V E N D I C AT IO N S

  1. Rotary collector for electrical winding device for closing with integrated emergency operation, characterized in that it consists of two male (19) and female (22) insulating bodies which are suitable for fitting one to the other. the interior of the other and whose walls facing each other have at least three stepped steps (19a, 22a) forming supports for annular metal discs (20, 23) arranged in pairs and connected to two sets electrical conductors (21a, 24a), the connection between the two discs (20-23) of the same pair being effected through at least one arched blade (20c) integral with one (20) of the discs so that '' a simple axial thrust exerted on one

  of the two insulating bodies ensures the transmission of current.

  2. Collector according to claim 1, characterized in that each disc (20, 23) is angularly retained on its step (19a, 22a). 3. Collector according to claim 2, characterized in that each step (19a, 22a) is cut from at least one housing (19b, 22b) profiled to receive a radial part in conjugated sailLie (20a, 23a)

  provided on the corresponding disc (20, 23).

  4. Collector according to claim 3, characterized in that the

  connection between each of the discs (20, 23) and the electrical conductors

  triques (21a, 12a) is operated at the projections (20a, 23a) of the

disc considered.

  5. Collector according to any one of claims 1 to 4,

  characterized in that each insulating body (19, 22) has channels

  longitudinal (19d, 22c) for the passage of the conductors (21a, 12a).

  6. Collector according to any one of claims 1 to 5,

  characterized in that at least some of the discs (20, 23) are retained

  bare axially on the corresponding step (19a, 22a).

  7. Collector according to claim 6, characterized in that the step (19a, 22a) has a projecting tooth (19c) behind which comes to snap the edge of the opening of the

corresponding disc (20, 23).