MXPA98006809A - Bracket arm for an external vehicle mirror with integr swivel articulation - Google Patents

Abstract

The present invention relates to a support arm for an external car mirror with an integrated swivel joint (1) between two segments (2, 3) of the arm, capable of snapping in at least one position, its rotating shaft (14) is at a right angle with respect to the longitudinal direction of the segments (2, 3) of the arm, comprising: a snap closure element (22, 38) which is not rotatably installed on a segment (2) of the arm, pressure counter-locking element (25, 42) which cooperates with and is under the force of a spring in the direction of engagement with the snap closure element (25, 42), is installed on the other arm segment (3) and it is also non-rotatable but capable of being displaced in the coupling direction relative to the segment (3) of the arm and the counter-lock element (25, 42) is suspended over the free end (48) of the support brace (26, 26 ') of the pier, e which is fixed by means of its fixed end to its segment (3) of the arm correspond

Description

BRAZO BRAZO FOR AN EXTERNAL MIRROR OF AUTOMOBILE WITH INTEGRATED ROTATING ARTICULATION Field of the Invention The present invention relates to a fastening arm for an external car mirror with an integrated swivel joint capable of snapping in at least one position.

Background of the Invention A mirror arm mechanism of this type is already known from EP 0 641 686 A2. With the rotating joint shown there, the different snap-fit elements which are subjected to the force of a helical thread spring in the direction of engagement of the snap mechanism. The modalities shown therein have in common that different wedge surfaces acting radially, which engage rings or segmented ring elements seated relative to each other in a relatively complex manner. To this degree the known rotating joint is of a complicated design and its assembly is expensive. In addition to the known swivel joint, Rff.27907 especially with a mode in which different segments of the separate ring are used to form wedge surfaces of snap-in or snap-in, the snap-fit elements can interfere with each other. This could block the rotating joint which could no longer carry out its safety function, that is to say the turning back when the external mirror supported by the clamping arm hits an obstacle. Due to the blocking or at least due to the slowness caused by the interaction of the various internal parts of the rotating joint, the manual turning of the mirror, for example to pass through narrow passages, becomes more difficult. With respect to the state of the art it should be pointed out as a general background that with such fastening arms with snap-fit or snap-fit joints, joint designs are often used where the arm segments leaving the swinging link are off center between if during snap action and quick disconnection of the swivel joint. This decentering has been compensated in the past by the elasticity of the clamping arms of considerable length. However, today's modern mirror designs have only very short clamping arms, which extend directly in the horizontal direction from the car chassis to the mirror housing. Especially with these designs, the spacing for the compensation of the length is very limited. A solution to this problem is already provided by the abovementioned EP 0 641 686 A2 patent, however with the disadvantages mentioned above. Based on the foregoing, the object of the invention is to present a clamping arm with a snap-fit pivoting joint, by which the two segments of the arm can be adjusted as before to each other, without displacement and while the articulation The rotating mechanism snaps into place and disconnects quickly, but also due to this the rotating mechanism or snap-fit mechanism is simpler and therefore easier to assemble and more compact. This object is achieved by means of the features indicated in claim 1. According to these characteristics, the fastening arm according to the invention is basically an arm that is continuous in at least the area of the rotating joint, whereby the The rotating shaft of the swivel joint formed between the two segments of the arm is at a right angle with respect to the longitudinal direction of the arm segments. The counter-pressure element under the pressure of the spring in the direction of engagement with the snap-in element is suspended according to the invention at the free end of a support strap made of a leaf spring which it is fixed by its fixed end to this segment of the corresponding arm. The leaf spring support brace ensures on the one hand that the pressure counterclock element is under the pressure of the spring, and on the other hand it provides an excursion route of the counterclockwise element when a segment of the arm is rotated relative to the other segment of the arm. Finally, the support brace also ensures the non-rotating retention of the pressure counter-locking element, so that the corresponding wedge and notch connections of the counter-lock element with its corresponding arm segment, when required in the state of the art , they can be omitted. Preferred embodiments as well as other characteristics, details and advantages of the invention are continued in the subclaims or in the description given below, in which the examples of the embodiments of the subject matter of the invention are explained through the attached drawings.

Figure 1 shows a vertical longitudinal section through the swivel joint of a clamping arm in a first embodiment, Figure 2 shows a top view of a rotatable articulation in a second embodiment and Figure 3 shows a view of the pivoting joint in a second embodiment. along the line III-III according to Figure 2.

Detailed description of the invention In the embodiment shown in Figure 1, the swivel joint designated by reference 1 in its entirety connects the two segments 2, 3 of the arm, of a support arm of an external truck mirror. The segment 2 of the arm shown in Figure 1 on the left side here consists of a press-molded part of support 4 located below, which leads or leads to the chassis of the truck. The part 4 is covered by a screen or grid 5 which leaves the end 6 free for the formation of the rotating joint. The segment 3 of the arm which extends to the right on Figure 1, is provided on the upper part with a molded part under pressure 7, which supports the external mirror on its end which is not shown. On the underside of the press molded part 7 a screen or grid 8 is also placed, leaving free the end 9 of the segment 3 of the arm. On this end 9 a kind of stump 11 of the shaft is formed in one piece, inside which the end of a threaded bolt 13 in the form of a square block 12 is incorporated by molding or casting the part and consequently connected not rotationally to it The element 11 is coaxial with the element 13 which defines the rotary shaft 14 of the rotary joint 1. For the interaction with the threaded bolt 13, the underlying end 6 of the arm segment 2 which is superimposed on the resting end 9 in a higher position of the segment 3 of the arm, it is provided with a bushing extension 10 made in one piece with it, the central hole 15 of which has a diameter such that a spacer bushing or sleeve 16 and on the upper part of the same a sliding bushing 17 can be inserted between the segment 13 of the arm and the hole 15. Pointing down, a mounting hole 18 with a wider diameter in which the end of the threaded pin 13 follows the hole 15. Screwing them on a nut 19 with an elastic washer 20 interleaved, the two segments 2, 3 of the arm, can be connected together without space in the direction of the rotating shaft 14 but are unable to rotate at tededor of the latter. The faces of the stump 11 of the shaft and of the extension of the sleeve 10 then come to be in contact with each other, but they are not screwed together tightly, due to the sleeve or spacer sleeve 16 and the elastic wedge 20, so that it reaches the turn is impossible. The swivel joint 1 can be snapped, at least in the extended starting position shown in Figure 1, by means of a snap shut-off device designated by reference 21 in its entirety. The snap lock device 21 is provided with a snap ring or snap ring 22 assigned to the arm segment 2 as a first snap-in element, the press snap ring 22 is not rotatably retained in a notch. annular 23 open at the top at the end 6 of segment 2 of the arm. The adjusting ring or snap-fit has several snap-fit notches 24 distributed on the circumference of its upper face, the notches have a trapezoidal profile in a circumferential as well as radial direction (as can be seen in Figure 1) . A pressurized counter ring 25 which is associated with a segment 3 of the upper arm interacts with the snap ring 2. The counter-ring 25 is suspended on a support strut 26 which extends parallel to the longitudinal direction of the segment 3 of the upper arm and at a right angle with respect to the rotating shaft 14 towards the support block 27 located then before the end 9 of the segment 3 of the arm. The support brace 26 is in the form of a metal sheet pierced pierced externally, a part of the shaft of which is fixed by its fixed end 28 on the support block 27 by means of a fixing screw 29. The free end of the support brace 26 is made in one piece with the shaft 28 and is made in the shape of an anchoring ring 30, the contour of which essentially follows the contour of the snap ring 25 when viewed from above. The additional fixing screws 31 fix the snap ring 25 to the anchoring ring 30 of the support strut 26. Figure 1 clearly shows that the snap ring 25 has snap-in hoses 32 on its face that points downwards, which have complementary contours with respect to the snap-in or snap-in notches 24. The support strap 26 in the form of a snap-in spring ensures that the snap-in hoses 32 are inserted into the notches adjustment or snap fit 24, and this is further aided by a pack of Belleville springs 33 threaded onto the axle journal 11. The latter is located between the back or back of the anchoring ring 30 that moves away from the counter-locking ring 25 and a counter-bearing 34 at the end 9 of the segment 3 of the arm. As can be seen further in Figure 1, the swivel joint 1 is completely integrated in the outline of the cross section of the segments 2, 3 of the arm since they do not protrude either up or down, nor on the sides more beyond the outer side of segments 2, 3 of the arm. With regard to the function of the swivel joint 1 with snap-in or snap-fit, it should be briefly pointed out that when a torque is exerted on the arm segment 3, it is transmitted by means of the support strap 26 to the counter-lock ring under pressure 25 causing it to be lifted by the support strut 26 and the Belleville springs pack 33 upwards and with its snap-fit hoses 32 out of the snap-in or snap-in notches 24 of the locking ring a pressure 22 against the force of the spring, and segment 3 of the arm becomes able to rotate relative to segment 2 of the arm. At the same time, there is no displacement of the segment 2 of the arm relative to the 3 'segment of the arm in the direction of the rotary axis 14. The object of the invention is therefore to achieve a device for closing or snapping free of space, flat and very compact, in a bra arm for the external mirrors of a car. By providing a plurality of equidistant snap-in or snap-in notches 24 and of snap-fit or snap-fit hoses 32 on the snap-on or snap ring 22 or on the snap-on snap ring 25, a snap-on or snap-fit is further possible. at gradual or step-by-step pressure of the swivel joint 1. In the embodiment shown in Figures 2 and 3, there is provided a snap-in device 21, with which the snap-in engagement is radial. The difference in this respect from the embodiment shown in Figure 1 will be explained in further detail below. However, in order to avoid repetition, it is pointed out that the swivel joint 1 'of the embodiment according to Figures 2 and 3 is installed in the same way between the two segments 2, 3 of the arm, of a mirror fastening arm. For this reason the corresponding components are provided with the same reference numbers and do not require additional explanation. The rotating support in the mode according to Figures 2 and 3 is effected by a stump 11 'of the shaft which completely traverses a support hole 15' at the end of a snap ring 36 which is placed with intercalation of an elastic washer 35, so that the two segments 2, 3 of the arm are connected to one another in the area of the rotating joint practically without spacing and in an articulated manner. To reduce friction between the two partners or support partners, a sliding disk ring 37 threaded on the axle journal 11 is provided between the bottom side and the top side of the arm segments 2, 3. The snap-on element on the arm segment 2 is a row of snap-fit teeth 38 which extends over the circumferential surface of a support element forming the support hole 15 'at the end 6 of the arm. segment 2 of the arm. This row of snap teeth or snap fasteners has trapezoidal snap fasteners 40 in a profile which leaves recesses 41 for snap fit between them. The snap counter element is a snap lock block 42 which is provided with side teeth 43 which complement the row of snap teeth 38 and has two snap teeth 44 with a recess for snap fit 45 among them. On the rear part 46 moving away from the side teeth 43, a spring support brace 26 'is again fixed at its free end, its fixed end 28' is secured to a projection 47 of the internal contour of the arm segment 3. The fixing between the support brace 26 'and the pressure counter block 42 or projection 47 can be effected as in Figure 1 by means of screw fixing or riveting, adequate securing, etc. Finally, it should be pointed out that in the embodiment according to Figures 1 or 2 and 3, both support braces 26, 26 'can also constitute the self-sealing profile at the same time. Thus, for example, the support strut 26 'may then be formed from its free end in accordance with the contour of the pressure counter block 42, so that the latter could be an integral part of the support strut. As FIGS. 2 and 3 clearly show, the support strut 26 'is additionally supported between its curled free end 48 and a counter-support 34' on the arm segment 3 by a spiral wound spring 49. The counterclock block pressure 42 with the support strut 26 'and the spiral wound spring 49 is then located in a recess similar to a compartment 50 in the segment 3 of the arm.

Again, it should be briefly noted, in relation to the pressure closing device 21 ', that for example the extended position of the two segments 2, 3 of the arm, shown in Figures 2 and 3, is suspended when the torque is applied to the segment 3 of the arm because this torque is transmitted by means of the support brace 26 'to the counter-lock block 42. The latter is lifted out correspondingly with its side teeth 43 from the row of snap-in teeth 38 against the force of the spring by the support strut 26 'and the spiral pressure spring 49. As a result a rotary movement results until the side teeth 43 and the row of snap-in teeth 38 are coupled together with one or more teeth completely. Again it can be seen that the support strap 26 'ensures a mobility of the counter-lock block 42 which is independent of the arm segment 3, so that with the excursion movement of the snap-lock no change in the positions occurs of the two segments 2, 3 of the arm, with each other. Also in the second embodiment, the full pressure closing mechanism remains within the cross-sectional contour of the arm segments 2, 3, as can be clearly seen when inspecting Figures 2 and 3 together.

It is noted that in relation to this date, the best method known by the applicant to carry out the aforementioned invention, is the conventional one for the manufacture of the objects to which it relates.

Having described the invention as above, property is claimed as contained in the following

Claims (10)

1. A fastening arm for an external car mirror with the integrated swivel joint capable of snapping in at least one position, between two segments of the arm, the rotating shaft of which is at a right angle with respect to the longitudinal direction of the arm. the segments of the arm, characterized in that it comprises: - a snap-on element is not rotatably provided on a segment of the arm, - a press-clamping element subjected to the force of a spring pushing it in the direction of coupling with the element of press-fit, is mounted on and cooperates with the other segment of the arm, the counter-lock element is also non-rotatable but able to move in the coupling direction relative to the arm segment and - the counter-lock element under pressure is suspended on the free end of a support brace similar to a spring, which is fixed in its former Fixed tremor to its associated arm segment.

2. The fastening arm according to claim 1, characterized in that the support brace is subjected to an additional spring force in the direction of engagement of the counter-lock element by a compression spring.

3. The clamping arm according to claims 1 and 2, characterized in that the pivoting joint is substantially integrally integrated in the cross-sectional contour of the arm segment when the two arm segments are in the extended position.

4. The clamping arm according to one of claims 1 to 3, characterized in that the pivoting joint cooperates with a counter-lock ring under pressure on the support strut when the snap-in connection is carried out in the axial direction, thus which the snap ring and the snap ring are provided with front interlocking teeth and are concentric around the rotating shaft.

5. The fastening arm according to claim 4, characterized in that the support brace is made in one piece with an anchoring ring on which the counter-locking ring is fixed.

6. The clamping arm according to claims 4 or 5, characterized in that the Belleville spring packing is used between the snap ring or the anchoring ring and a counter-bearing on the arm segment to ensure the application of a force of additional spring on the snap ring.

7. The clamping arm according to one of the claims 1 to 3, characterized in that when a snap-in connection is established with the coupling direction in the radial direction of the rotating joint, a counter-locking element resembling a block the which engages a row of clamping teeth that point radially in an outward direction on the segment of the first arm, is provided on the support strut on the other arm segment.

8. The clamping arm according to claim 7, characterized in that the row of clamping teeth is located on the circumferential surface of a support element on the arm segment which constitutes the support hole of the pivoting support pin.

9. The clamping arm according to claims 7 or 8, characterized in that the counter-locking element similar to a block is installed with its support strut in a recess similar to a compartment in the arm segment.

10. The clamping arm according to claims 1 to 9, characterized in that the snap-on element and the counter-snap element have wedge-shaped snap-on profiles, which are complementary to each other.