FR2782853A3 - Supply reel for electrical cable - Google Patents

Abstract

The housing consists of upper (5) and lower (10) housing shells that fit together and within which there is a reel element (20,30) with guidance for a spirally wound ribbon cable. A torsion spring (60) provides wind up torque and is located in a separate compartment. One cable is passed tangentially and the other through a central aperture (14)

Description

REEL FOR ELECTRIC WIRE

  The present invention relates to a reel for electric wire and, more particularly, a reel for electric wire intended for use in the technical field of telecommunications. Conventional electric wire reels commonly use a winding mechanism for the automatic rewinding of an electric wire. Because this type of winding mechanism takes up a lot of space, the housing must be large enough to accommodate the winding mechanism. In addition, since the winding mechanism and the electric wire are placed coaxially inside the housing, the tensile force received by the winding mechanism increases accordingly when the wire is pulled more. electric to extract it from housing. An object of the present invention consists, by

  Therefore, to offer a reel for electric wire, which is small and practical to handle.

  Another object of the present invention is to provide a reel for electric wire which has a long service life. According to the present invention, the reel for electric wire therefore comprises a shell forming a lower cover, a shell forming an upper cover covering the shell forming the lower cover, a rotary mounting support mounted so as to be able to rotate, on an annular flange of coupling inside the shell forming the upper cover, and containing a plurality of L-shaped terminals, a terminal holder rigidly mounted in the shell forming a lower cover and containing a plurality of annular terminals of different diameters, a rotary disc connected to the rotary mounting support, metallic conductive means mounted in the rotary disc and electrically connecting the L-shaped terminals to the annular terminals, a first electric wire wound around the rotary mounting support and having 5 conductors urs respectively connected to the L-shaped terminals, a second electrical wire, passing through a wire outlet, located in the shell forming the lower cover, and having conductors respectively connected to the annular terminals, and a powerful spiral spring mounted in the shell forming the lower cover and connected to the rotating disc outside of the rotating mounting bracket so

  return the rotary disc and the rotary mounting support to the initial position after the first electric wire has been pulled out of the shell forming the upper cover.

  Since the powerful spiral spring and the rotary mounting support (first electrical wire) are not arranged concentrically inside the shells forming covers, the powerful spiral spring receives a constant tensile force when the first electrical wire is extract from the shell forming the upper cover. Other characteristics and advantages of the invention will emerge more clearly on reading

  the description below, made with reference to the accompanying drawings, in which:

  Figure 1 is an exploded view of a reel for electric wire according to the present invention (electric wires absent); Figure 2 is an elevational view of the wire reel according to the present invention; Figure 3 is a side sectional view of the shell forming an upper cover for the electric wire reel according to the present invention; Figure 4 is a top plan view of the rotating disc for the electric wire reel according to the present invention; Figure 5 is a side sectional view of the rotating disc for the electric wire reel according to the present invention; Figure 6 is a bottom view of the rotating disc for the electric wire reel according to the present invention; FIG. 7 is a top plan view of the rotary mounting support for the electric wire reel according to the present invention; Figure 8 is a bottom view of the rotary mounting bracket for the electric wire drum according to the present invention; Figure 9 is a side sectional view of the rotary mounting bracket for the electric wire drum according to the present invention; FIG. 10 is another side view of the rotary mounting support for the electric wire reel according to the present invention; Figure 11 is a top view of the terminal holder for the electric wire reel according to the present

  invention; Figure 12 is a side sectional view of the holder

  terminals for the electric wire reel according to the present invention; Figure 13 is a bottom view of the terminal holder for the electric wire reel according to the present invention; Figure 14 is a sectional view, in enlargement, of part of the present invention; Figure 15 is a front view of an L-shaped terminal according to the present invention; Figure 16 is a side view of the L-shaped terminal according to Figure 15; and Figure 17 is a schematic representation showing the connection between the conductors of the wire

  switch B and the L-shaped terminals in the rotary mounting support.

  Referring to Figures 1 and 2, a drum 1 for electric wire according to the present invention generally consists of a shell forming an upper cover 50, a shell forming a lower cover 10, a rotary mounting support 30, d a rotating disc 40, a powerful spiral spring 60, and a terminal holder 20. The shell forming the lower cover 10 includes a recess

  circular 11 in the center, a plurality of positioning holes 12 and a wire outlet 14, which passes through the circular recess 11, a spring housing 16 which receives the powerful spiral spring 60, and a plurality of mounting holes 18 at the edge area.

  Referring to Figure 3 and again to Figures 1 and 2, the upper cover shell 50 covers the lower cover shell 10, an annular coupling flange 52 protruding from the lower side wall at the center , a plurality of rods 54 forming protruding from the lower side wall and being respectively inserted into the mounting holes 1825 provided on the shell forming the lower cover 10, and a lateral notch for wire 56, through which passes an electric wire B. With reference to FIGS. 4 to 6 and still to FIGS. 1 and 2, the rotary disc 40 is mounted inside the space defined by the shell forming the upper cover 50 and by the shell forming the lower cover 10, and it comprises a hub 41, a retaining notch 411 situated at the periphery of the hub 41 and to which is connected an outer end of the powerful coiled spring 60, a plurality of rectangular positioning holes 42 and a plurality of vertical through holes 43 at the central area of the hub 41, a plurality of metal compression springs 45, respectively mounted in the vertical through holes 43 at the top side, a a plurality of metal balls 47, mounted respectively in the vertical through holes 43 at the bottom side, and a plurality of metal washers 46, mounted respectively in the vertical through holes 43 between the corresponding metal compression springs 45 and the corresponding metal balls 47 . Referring to FIGS. 7 to 10, as well as to FIGS. 1 and 2, the rotary mounting support 30 is installed between the rotary disc 40 and the shell forming the upper cover 50 and it comprises an upper circular coupling withdrawal 31, formed in its upper side in order to receive the annular flange20 for coupling 52 of the shell forming the upper cover, a lower rectangular recess 32, formed in its lower side, parallel grooves 33 arranged in the lower rectangular recess 32, parallel to the two large opposite sides of the lower rectangular recess 32, a plurality of hooks 35 directed downward and positioning lugs 36, directed downward and associated with the rectangular positioning holes 42 present in the rotating disc 40, thereby allowing the rotating support 3030 to be rotated at the same time as the rotary disc 40 on the annular flange coupling 52

  of the shell forming an upper cover 50, and two rows of recessed holes 34, arranged along the two opposite long sides of the lower rectangular recess 35 32.

  Referring to FIGS. 11 to 13 and still to FIGS. 1 and 2, the terminal holder 20 is mounted inside the hub 41 of the rotary disc 40 and of the circular withdrawal 11 of the shell forming the lower cover 10, and it comprises , on the lower side, a chamber 21 open towards the bottom, a plurality of mounting rods 22 directed downwards and respectively associated with the positioning holes 12, present in the circular recess 11 of the shell forming the lower cover 10, a plurality of annular grooves 23, arranged concentrically in its upper side, a plurality of positioning notches 231 spaced equianglely respectively in the annular grooves 23, and a plurality of holes for 15 wire 232, provided respectively in the annular grooves 23 and passing through the upper sides and

  inferior. A plurality of annular terminals 24 of different diameters are respectively mounted in the annular grooves 23, and they each have a plurality of positioning tabs 241 which respectively penetrate into the positioning notches 231.

  An electric wire A passes through the wire outlet 14, located in the shell forming the lower cover 10, and it comprises a plurality of conductors, respectively inserted into the holes for wire 232 and welded to the positioning tabs 241 of the annular terminals 24.

  Referring now to Figures 14 to 17, as well as Figures 1 and 2, a plurality of L-shaped terminals 37 are respectively rigidly mounted in the grooves 33 present in the lower rectangular recess 32 of the rotary mounting support 30, of corresponding to the vertical through holes 43 located in the rotating disc 40. Each L-shaped terminal 37 has a short side and a long side, connected at right angles, and a V-shaped notch 371 at the end of the short side. The electric wire B, which passes through the lateral notch for wire 56 of the shell forming the upper cover 50, is wound around the rotary mounting support 30, and it has a plurality of conductors which are respectively fixed to the V-notches 371 of the L 37 terminals. The short side of each L 37 terminal is fixed to a groove 33 located in the lower rectangular recess 32 of the rotary mounting support 30, and the long side of each L 37 terminal is placed in a hole in 10 removal 34. Once the installation is complete, the L-shaped terminals 37 are respectively kept in contact with the metal compression springs 45. Consequently, the two electric wires A, B are electrically connected via the terminals 24, 37 , metallic balls 47, metallic washers 46 and metallic compression springs 45. When the metallic wire B is pulled outwards to extract it from the electric wire drum on the d istance desired, the rotary mounting support 30 and the rotary disc 20 are driven in rotation on the terminal holder, which causes the winding of the powerful spiral spring 60. When the traction exerted on the electric wire B is released, the spring powerful spiral 60 immediately resumes its former shape, which causes the rotary disc 40 and the rotary mounting support 30 to rotate in the opposite direction, and therefore the electric wire B is rewound by the rotary mounting support 30 Although the invention has been particularly shown and described with reference to a preferred embodiment thereof, it will be readily understood

  by those skilled in the art that modifications in form and detail can be made without departing from the spirit or the scope of the invention.

Claims (3)

RESELL I CATIONS   1. Electric wire reel, comprising: a shell forming a lower cover (10), comprising a circular central recess (11), a wire outlet (14), which may be a first electric wire (A) passing through it, a spring housing (16) located on one side of said circular central recess (11), and a powerful coiled spring (60), mounted in said spring housing (16); an upper cover shell (50) covering said lower cover shell (10), said upper cover shell (50) comprising an annular coupling flange (52) projecting from a bottom wall in the center thereof ci, and a side notch for wire (56); a rotary disc (40) mounted inside the space defined by said upper cover shell (50) and by said lower cover shell (10), said rotary disc (40) having a hub (41), a retaining notch (411) located at the periphery of said hub (41) and to which is fixed an outer end of said powerful coiled spring (60), a plurality of vertical through holes (43) at the level of the central zone at the inside of said hub (41), and a plurality of metal balls (47), respectively mounted in said vertical through holes (43) at a lower side; a rotary mounting support (30), installed between said rotary disc (40) and said upper cover shell (50), said rotary mounting support (30) comprising an upper circular coupling recess (31), formed in a upper wall thereof in order to receive the annular coupling flange35 (52) of said shell forming upper cover 9 (50), a lower rectangular recess (32) formed in a lower wall thereof, parallel grooves ( 33) arranged in said lower rectangular recess (32), parallel to the two opposite long sides of said lower rectangular recess (32), a plurality of L-shaped terminals (37), mounted in said grooves (33) and placed in contact with said balls metallic (47), said rotary mounting support (30) being fixed to said rotary disc (40) and being rotated along with said rotary disc (40); a terminal holder (20), mounted inside the hub (41) of said rotary disc (40) and of the circular withdrawal (11) of said shell forming a lower cover (10), said terminal holder (20) comprising, in a lower wall, a chamber (21) open downwards, a plurality of annular grooves (23), arranged concentrically in its upper wall, a plurality of positioning notches (231) spaced 20 equiangle respectively in said annular grooves (23), a plurality of wire holes (232), respectively provided in said annular grooves (23), a plurality of annular terminals (24) of different diameters, respectively mounted in said annular grooves (23) and placed in contact with said metal balls (47), said annular terminals (24) each having a plurality of positioning tabs (241), respectively fixed in the positioning notches (231) present in the 30 ra annular inures of said terminal holder (20) and intended to be soldered to a plurality of conductors of said first electric wire (A), after said first electric wire has been introduced through the wire holes (232) of said terminal holder (20 ); and a second electric wire (B) wound around said rotary mounting support (30) and exiting through the notch   lateral for wire (56) of the shell forming upper cover (50), said second electric wire (B) having a plurality of conductors which are respectively fixed5 to said L-shaped terminals (37).   2. Electric wire reel according to claim 1, wherein said L-shaped terminals (37) each have a short side, fixed to a groove (33) located in the lower rectangular recess (32) of said rotary mounting support (30) , and a long side, mounted transversely in the lower rectangular recess (32) of said rotary mounting support (30), the short side of each of said L-shaped terminals (37) having a   V-shaped end notch (371) to which is connected a conductor of said second electric wire (B).   3. A wire reel according to claim 1, wherein said rotary disc (40) comprises a plurality of metal compression springs (45), respectively mounted in the vertical through holes (43) between the upper side of said rotary disc (40 ) and said metal balls (47), a plurality of metal washers (46), respectively mounted in the vertical through holes (43) of said rotary disc (40) and placed in contact between said metal compression springs   (45) and said metal balls (47).