GB2195703A

GB2195703A - Window-winder for motor vehicles

Info

Publication number: GB2195703A
Application number: GB08722726A
Authority: GB
Inventors: Carlos Cebollero Gabas
Original assignee: Industrias Techno Matic SA
Current assignee: Industrias Techno Matic SA
Priority date: 1986-10-06
Filing date: 1987-09-28
Publication date: 1988-04-13
Anticipated expiration: 2007-09-28
Also published as: GB2195703B; IT8767722A0; DE3729694A1; GB8722726D0; FR2606452A1; IT1211269B; ES2003129A6; JPS6397785A

Abstract

A light, compact motor-vehicle window-winder includes a drive shaft (8), rotated by means of a handle, and a cylindrical drum (1) with an external helical groove (2) for the window cable (13). The drive shaft extends through an annular drum core (4) within a cylindrical drum recess (3), and transmits drive to the drum via two cranked arms (7) carried by the shaft and located between two lugs projecting from the core. The lugs divide the recess into two symmetrical parts, and have end faces flush with a drum end face. A braking mechanism is also housed in the recess (3) and comprises a helical torsion spring (10) having ends bent inwardly one on either side of a said lug. When the drive shaft is turned in either sense, drive is transmitted through the arms (7), spring ends and lugs to rotate the drum, if the window is forced, the force is transmitted to the drum, to the lugs and to a bent spring and to increase drum braking. <IMAGE>

Description

GB2195703A 1 SPECIFICATION for the window within the drum reduces the

overall volume of the window winder com Window-winder for motor vehicles pared with the known window winders de scribed above which results in a gain in the The present invention relates to a manually- 70 space within the door to which it is fitted.

operable window-winder for vehicles which This reduction in volume may be further en has some notable improvements over prior-art hanced in the window winder of the invention devices for the same purpose. by the location of the braking mechanism Known manual window-winders generally in- within the drum as well.

clude a cylindrical drum with a helical groove 75 The braking mechanism preferably corn- in its circumferential surface in which the two prises a helical torsion spring which is housed free end portions of a cable are wound, start- in the recess in the cylindrical drum, between ing from the ends of said groove and meeting the inner face of the drum and the core which near the central region from which they pro- projects from the bottom of the recess, the ject tangentially outwardly in opposite direc80 ends of the spring being bent inwardly to tions The middle part of the cable carries the wards the centre of the spiral and located on window-glass support and the cable is each side of one of the lugs to form a highly suitably guided to transmit thereto a rectilinear compact assembly. The spring is preferably raising or lowering movement, originated by housed in a casing having a broad flange at the rotation of the drum which is kinematically 85 one end with holes for facilitating assembly.

connected to the respective handle. The window-winder of the invention prefera- In order to avoid problems which the free bly also includes a base plate on which the movement of the window glass would cause other components are mounted and a coop in use, for example, the undesired opening of erating cover, the cover and the base plate the window due to the weight of the window- 90 having asymmetrical outlines and the base glass itself or even due to an unlawful attempt plate having tabs on its edge for securing the to open it from the outside, modern window- cover so as to facilitate assembly whilst, at winders incorporate a braking mechanism the same time, making it impossible for the which is inserted between the operating assembly to be carried out in more than one handle and the aforementioned helical drum. 95 position.

This braking mechanism incorporates a ten- The present invention will now be de- sioned helical spring housed within a spring scribed, by way of example, with reference to casing and having hooked ends so that, when the accompanying drawings, in which:

it is at rest, it prevents the drum from rotating Figure 1 is a sectional view of a window- freely due to its high friction whilst, when the 100 winder taken on the line 1-1 of Figure 3, show handle is turned in one direction or the other, ing its main components; it pulls on one end of the spring to which it is Figure 2 is a partially- sectioned view similar hooked, reducing the friction very considerably to that of Figure 1, showing some of the and driving the drum of the winder. component parts on a smaller scale and in In known manually-operable window-winders 105 positions differing from those of Figure 1;. and the aforementioned components are located in Figures 3 and 4 are respective plan views juxtaposed positions so that a bulky device is of each of the sides of the window-winder produced. The object of the present invention showing its overall appearance.

is to provide a less bulky, simpler and cheaper As can be seen from the drawings and the window-winder. 110 reference numerals provided, the manually- Accordingly, the present invention provides operable window-winder generally comprises a a manual ly-oPerable winder for a motor cylindrical drum 1 (see mainly Figures 1 and vehicle, of the type having a cylindral drum 2), with a helical groove 2 in its external, cir with a helical groove in its outer surface for cumferential surface and a recess 3 in one receiving a cable for operating the window, a 115 end face, which is also cylindrical and through drive shaft connected to a handle for rotating which extends an annular core 4 with a the drum and a braking mechanism interposed through-hole 5.

between the drive shaft and the drum, in Two lugs 6 project from the core 4 so that which the drum has a cylindrical recess in one their ends are flush with the said end face and end face, a coaxial annular core extending 120 they define two symmetrical spaces in the re from the other end into the recess, and two cess 3. These spaces house, with preset lugs proje cting from the core so as to divide clearance, respective cranked arms 7 (only the recess into two parts symmetrical about one is shown in the drawings) carried by a the core, the lugs having end faces flush with drive shaft 8 of the device which extends the said end face of the drum, and in which 125 through the annular core 4. The lugs 6 and the drive shaft carries two arms each housed the arms 7 are shaped in such a way as to within a respective one of the recess parts leave a free annular space adjacent the internal with predetermined clearance for transmitting surface of the drum, which houses a braking drive from the drive shaft to the drum. mechanism of the window winder comprising The location of part of the drive mechanism 130 a helical torsion spring 10 contained in a 2 GB2195703A 2 spring-casing 9 having a broad radial fixing which seats against the said end face of the flange at one end which seats against the said drum.

Claims

end face of the core 4. 4. A window-winder as claimed in Claim 1,

The ends of the spring 10 are bent in to- Claim 2 or Claim 3, including an asymmetri- wards the Centre of the helix and are located 70 cally-shaped base plate on which the compo- one on either side of one of the lugs 6. The nents are assembled and a cover for fitting spring 10 is normally in contact with the inter- over the components and having a periphery nal wall of the casing 9, exerting pressure 3. A window-winder as claimed in Claim 2, thereon. in which the spring is housed in a casing The window-winder is completed by a base 75 which is a close fit in the recess and has a plate 11, preferably of metal, on which the radially-outwardly projecting flange at one end other components are mounted, a moulded which seats against the said end face of the cover 12 which fits over the base plate in a drum.

single position by virtue of their cooperating 4. A window-winder as claimed in Claim 1, asymmetrical outlines, and a cable 13 located 80 Claim 2 or Claim 3, including an asymmetri- in the helical groove of the drum 1 for cally-shaped base plate on which the compo transmitting movement from the drum 1 to nents are assembled and a cover for fitting the mounting of the window-glass of the over the components and having a periphery vehicle in known manner. corresponding to that of the base plate, for The base-plate 11 has a projecting rim 14 85 assembly therewith in only one possible confi- around its periphery with tabs 15 for securing guration, the base plate having peripheral tabs the cover 12 to it to facilitate assembly. for engagement with the cover to retain it.

In use, when the drive shaft 8 is rotated by 5. A window-winder substantially as herein means of -the handle, a respective one of its described with reference to and as shown in cranked arms 7 acts on an adjacent bent end 90 the accompanying drawings.

of the spring 10 to rotate the spring 10 and the drum 1 so as to raise or lower the win- Published 1988 at The Patent office, state House, 66/71 High Holborn, London WC 1 R 4TP. Further copies may be obtained from dow. When, on the contrary, an attempt is The Patent Office, Sales Branch, St Mary Cray, Orpington, Kent BR5 3RD.

made to raise or lower the window by action Printed by Burgess & Son (Abingdon) Ltd, Con. 1187.

on the window itself, the force is transmitted by the cable 13 to the drum 1, and specifi cally to the lugs 6, the- respective one of which acts on the adjacent bent end of the spring 10 to increase its pressure on the drum and brake the movement of the drum.

CLAIMS 1. A manually-operable winder for a motor vehicle, of the type having a cylindrical drum with a helical groove in its outer surface for receiving a cable for operating the window, a drive shaft connected to a handle for rotating the drum and a braking mechanism interposed between the drive shaft and the drum, in which the drum has a cylindrical recess in one end face, a coaxial annular core extending -from the other end into the recess, and two lugs projecting from the core so as to divide the recess into two parts symmetrical about the core, the lugs having end faces flush with the said end face of the drum, and in which the drive shaft carries two arms each housed within a respective one of the recess parts with predetermined clearance for transmitting drive from the drive shaft to the drum.
2. A window-winder as claimed in Claim 1, in which the braking mechanism includes a helical torsion spring housed within the recess around the core 9 its projecting lugs and hav ing inwardly-bent ends located one on each side of one of the said lugs.
3. A window-winder as claimed in Claim 2, in which the spring is housed in a casing which is a close fit in the recess and has a radially-outwardly projecting flange at one end