EP0984119B1 - Spring spindle, in particular a square-spindle for a handle - Google Patents

Abstract

A door latch fitting has the square operating bar, to which is fitted the door handle, fitted with a spring element to take up any play in the fitting. Two adjacent sides of the bar are machined to form a recess to take the spring strip. The edge between the machined sections is rounded (4) to allow the spring strip to flex. The spring strip is shaped with sprung profiles and has a V-shaped profile with an angle of 90 deg. The spring is made from metal strip and extends for the length of the bar.

Description

The present invention relates to a spring pin, in particular a square pin for a door or window handle, preferably for a door handle.

Square pins for door or window fittings are known and widely used. A square pin as a pusher mandrel is inserted through a square hole of a lock nut, and pushers are placed on one or both ends. One end of the square pin is inserted into a square hole in the pusher.

The problem here is, on the one hand, that an undesirable play is usually present between the lock nut and the pusher mandrel. This game is often eliminated in that in the Schloßnuß a spring element, such as a sleeve-like spring element made of thermoplastic material, is attached, or it is a so-called "Klemmnuß" is used, which has an inwardly directed in the direction of the square pin spring action.

On the other hand, a game between the square hole in the pusher and the square pin must be eliminated and the pusher must be fixed to the square pin, so that it is not removed when pressed. This is often done by clamping screws or Spreizstifte.

From DE-U-7426528 a door lever connection with a pusher mandrel is known, wherein the pusher mandrel is assigned on one side a weakly corrugated leaf spring whose width and length correspond approximately to the width and length of the pusher mandrel. The spring element has only in the middle of the leaf spring a spring action.

From DE-U-1887227 a door handle pin with a leaf spring is also known, wherein the leaf spring extends over the entire length of the door push pin and has three wave-like curvatures, which provide its spring action.

From DE-C-949276 and the associated DE-B-1011770 a pusher connection for detachable connection of a handle handle with a pusher mandrel is known, which can alternatively be used to attach a pusher mandrel in a locknut. The pusher mandrel is provided with a spring element which has two legs and extends over a portion of the length of the mandrel.

With these known square pins or pusher thorns it is not yet possible to eliminate the game between the pin and the locknut and at the same time the game between the door handle and the pin in various combinations of doors, locks and door handles regardless of their strength.

The object of the invention is therefore to improve known square pins so that for various combinations of doors, locks and door handles regardless of the strength of the door and the depth of the square holes in the door handles the game between square pin and Locknut and at the same time the play between pusher and square pin is eliminated.

This object is achieved by a square pin according to claim 1. Accordingly, a spring element extending substantially over the entire length of the square pin is arranged on at least one edge of the square pin. As a result, over the entire length of the same spring effect is present, so that the pin according to the invention is suitable for a variety of combinations of doors and locks, each having different strengths. Since the spring action is evenly distributed over the entire length of the pin, it is present in the same way at every point and therefore always acts independently of the thicknesses of the door and lock in the area of the square hole in the pusher and in the area of the square hole of the lock nut.

Preferably, the spring element is formed substantially as an angle element with two legs which enclose an angle of about 90 °. In particular, the legs have approximately the same length in a direction transverse to the main axis of the square pin.

The square pin is preferably formed as a profile pin whose cross-section at the said edge on which the spring element is arranged, a recessed region, so that the profile pin completes substantially together with the spring element, the square shape. In this case, the recessed portion of the profiled pin may be formed such that the legs of the spring element abut in the region of their outer ends at the recessed area, the transition region between the legs, however, is spaced from the profiled pin.

This is achieved, for example, in that the mentioned edge, on which the spring element is arranged, is rounded off with a radius. Preferably, the spring element is a bent part, which in the transition region between the legs inside forms a radius which is smaller than the mentioned radius of the edge of the square.

In order to create a larger spring travel for the spring element, the recessed region of the profiled pin can be repeatedly stepped on both affected side surfaces of the square.

When the recessed portion of the profiled pin is recessed in the direction along the side surfaces of the square and transversely to the major axis of the square pin to a greater degree than the mentioned length of the legs in the direction transverse to the major axis of the square pin, the angle of the spring element can be spread by force, which leads to an additional spring effect.

Moreover, the spring action is preferably achieved in that the angle element has on the two, the included angle facing away from the outer sides of the legs a plurality of bulges, which may be in particular substantially diamond-shaped, further comprising two opposite sides of the diamond-shaped bulge substantially parallel to the Be longitudinal edges of the angle element and the other two sides of the diamond-shaped bulge with the longitudinal edges of the angle element can form an angle of about 45 °. The oblique arrangement of the bulges or projections facilitates the insertion and removal of the pin in and out of the lock nut, in particular when using a so-called. "Klemmnuß", which itself has a directed inward in the direction of the pen spring action. Furthermore, the insertion and removal of an actuating element, such as a door handle, is facilitated.

If according to a preferred embodiment, the respective distance between two adjacent bulges in the longitudinal direction of the angle element is about the same as the width of a respective bulge in the same direction, results in an almost complete coverage of the length of the pin with spring projections, so that substantially over the entire Length of the pin the same spring action is present.

Preferably, the bulge in the vertical cross section between the two mentioned, substantially parallel to the longitudinal edges of the angular element extending sides is curved or circular arc-shaped.

It should also be noted that the spring action of the angle element, for example, by a single, extending in the longitudinal direction of the spring element, outwardly projecting bulge in each of the legs can be provided, wherein the bulge extends substantially over the entire length of the spring element. This bulge can be subdivided in any desired manner into a plurality of subsections, with an oblique subdivision being preferred for the abovementioned reasons.

According to a preferred embodiment, the spring element can be plugged onto the profile pin, so that a uniform spring pin yields and the relative arrangement between the profile pin and spring element is always maintained. For this purpose, the profile pin on its end faces on a particular conical or cylindrical recess, and the spring element has at its front ends bent over lugs which engage in said recess in the profile pin. Preferably, the recess is at profile pins of different thickness cross section always at the same distance from the peripheral region of the profiled pin - possibly also acentric with respect to the end face - provided so as to achieve that one and the same spring element can be used for profile pins with different strong cross-section.

The profile pin is preferably made of C15 steel or an equivalent material with a coating of Fe / Zn, whereas the spring element consists of spring steel and can be advantageously produced in the stamping-stamping process.

Fig. 1

eine Querschnittansicht eines Vierkantstifts gemäß einem ersten Ausführungsbeispiel der Erfindung;

Fig. 2

eine Querschnittansicht eines Vierkantstifts gemäß einem weiteren Ausführungsbeispiel der Erfindung;

Fig. 3

eine Draufsicht auf den Profilstift gemäß Fig. 2, teilweise im Schnitt;

Fig. 4

eine Ansicht eines erfindungsgemäßen Federelements vor dem Umbiegen der Ansätze an den Enden des Federelements;

Fig. 5

eine vergrößerten Ausschnitt der Ansicht gemäß Fig. 4, etwa dem in Fig. 4 mit X bezeichneten Bereich entsprechend;

Fig. 6

eine Schnittansicht des Federelements entlang der Linie A-A in Fig. 5;

Fig. 7

eine Ansicht ähnlich Fig. 6, jedoch nach dem (zweifachen) Umbiegen der Ansätze an den Enden des Federelements;

Fig. 8

eine etwa dem in Fig. 5 mit Y bezeichneten Bereich entsprechende Ansicht nach dem Umbiegen des Ansatzes;

Fig. 9

eine perspektivische Ansicht eines Endes des zusammengesetzten Federstifts; und

Fig. 10

eine perspektivische Schnittansicht des zusammengesetzten Federstifts.

Further details, advantages and objects of the invention will become apparent from the following description of preferred embodiments with reference to the drawing; in the drawing shows:

Fig. 1

a cross-sectional view of a square pin according to a first embodiment of the invention;

Fig. 2

a cross-sectional view of a square pin according to another embodiment of the invention;

Fig. 3

a plan view of the profiled pin of Figure 2, partially in section.

Fig. 4

a view of a spring element according to the invention before the bending of the lugs on the ends of the spring element;

Fig. 5

an enlarged section of the view of Figure 4, approximately corresponding to the region indicated in Figure 4 with X ..;

Fig. 6

a sectional view of the spring element along the line AA in Fig. 5;

Fig. 7

a view similar to Figure 6, but after the (double) bending the lugs on the ends of the spring element.

Fig. 8

a view corresponding approximately to the area designated by Y in FIG. 5 after bending over the projection;

Fig. 9

a perspective view of one end of the composite spring pin; and

Fig. 10

a sectional perspective view of the composite spring pin.

Referring first to Fig. 1, there is shown a cross-sectional view of a square pin 1 according to a first embodiment of the invention. The square pin has two parts, namely a profiled pin 2 and a spring element 3.

The profiled pin 2 is essentially a square pin, but is reset at one edge 4, so that there is a recess 5 extending over the edge 4 across the corner. The recess 5 has at the edge 4 remote from the end a depth which corresponds approximately to the material thickness of the spring element 3, so that the patch spring element 3 substantially completes the square shape of the spring pin 1. The depth of the recess 5 gradually increases towards the edge 4, and the edge 4 is rounded with a radius, so that a correspondingly increasing intermediate space 6 is formed between the profiled pin 2 and the spring element 3.

The spring element 3 has an angular configuration and has two legs 7, 8, which are formed substantially identical and have according to the sectional view shown in the plane of an equal length. However, this length of the legs 7, 8 is shorter than the extent of the recess 5, so that between a respective end of the legs 7, 8 of the spring element 3 and one of the recess 5 to the maximum outer dimension of the profiled pin 2 leading stage 9, 10 a Interspace 11, 12 is formed, in which the legs 7, 8 of the spring element 3 can move when the spring element 3 is pressed upon application of force in the direction of the central axis M of the spring pin 1 and thereby slightly spread.

The angle between the two legs 7, 8 is preferably 90 ° or less than 90 °.

FIG. 2 is a view similar to FIG. 1. The profile pin according to the embodiment of FIG. 2 differs from the profile pin 2 according to FIG. 1 in that the recess 5 is stepped several times. In particular, a first step 9, 11 leads to a first depth of the recess 5, which corresponds approximately to the material thickness of the spring element 3. This first depth of the recess 5 is maintained approximately constant in order to provide a sufficiently large shoulder for supporting the spring element 3. A further step 13, 14 then leads to a second depth of the recess 5, which is greater than the material thickness of the spring element 3, so that a gap 6 between the profile pin 2 and the spring element 3 is formed. Similar to the first embodiment, the edge 4 is also rounded here with a radius which is greater than a radius in the bending region of the angle element 3, to provide the gap 6 in the edge region.

On the spring element 3 1 and 2 bulges or projections can be seen in Fig., Which will be described in more detail below.

Preferably, the remaining edges of the profiled pin 2 are chamfered or rounded with a small radius (cf., Fig. 1 and 2), to allow easier insertion into the respective square hole.

As can be seen in Fig. 3, the edges of the respective end face of the profiled pin are provided with a chamfer 15. This also serves for easier insertion into the respective square hole.

The end faces of the profile pin each have a centrally-centered, conical depression 16 whose opening angle can be, for example, 120 °.

FIG. 4 shows a view of a spring element 3 according to the invention. As can be clearly seen in FIG. 4, a plurality of bulges or projections 20 are provided on the leg 8 of the spring element 3 and extend substantially over the entire length of the spring element 3. A corresponding plurality of bulges 20 is provided on the other leg 7, namely arranged in mirror image with respect to the bending line of the angle element 3.

As can be seen more clearly in FIG. 5, the bulges 20 have the shape of a rhombus whose sides are substantially parallel to one another the longitudinal edge 8a of the leg 8 and on the other hand with this edge 8a form an angle of 45 °. The width B of the bulge 20 is about the same size as the gap Z between each two adjacent bulges.

In Fig. 6 it can be seen that the bulges 20 in the vertical cross-section between the two substantially parallel to the longitudinal edges of the angular element extending sides are arcuate and merge at the ends in each case in the otherwise planar structure of the respective leg. On the two other sides of the diamond-shaped bulge, the transition can be similarly soft or abrupt, as can be seen, for example, in FIG.

The spring element 3 has at the ends lugs 17, 18, which are not bent in the view of Fig. 4 and 5. The outer contour of the projections 17, 18 corresponds to an extension of the outer edge of the legs 7, 8. The inner contour of the projection 18, d. H. the contour pointing towards the crease line of the angle element 3 starts at the crease line with a circular arc 18a which extends over approximately 120 °, then merges into a straight step 18b which forms a parallel with the outer contour and finally strikes a slope 18c of about 45 ° on the outer contour. The projection 17 on the other leg is formed corresponding mirror image, so that a corresponding contour 17a, 17b, 17c results.

For attachment of the spring element 3 to the profile pin 2, the approaches are bent. This is preferably done by double bending, namely once at a first bend by about 90 ° and on the other at a closer to the outer end of the approach located second bending point by about 40 °.

When the lugs 17, 18 are bent twice at the ends of the spring element 3 and the spring element 3 is placed on the profiled pin 2, engage the twice bent outer ends of the lugs 17, 18 in the recess 16 in the end face of the profiled pin to the Secure spring element 3 on profile pin 2. This can be seen particularly well in FIG. 9. It should be noted that various other ways of attaching the spring element to the profile pin are possible, including clips, notches, clamps, welding, etc.

The use of multiple spring elements at several edges of the mandrel is possible.

Preferably, the spring pin is used together with a door fitting with door handle. However, the spring pin is also suitable for various other applications or possibly adaptable, for example for window fittings.

Claims (16)

1. Square spindle (1) with a spring element (3) which extends at at least one of the edges (4) of the square spindle (1) over substantially its full length,
   characterized in that
   the spring action of the spring element (3) is substantially constant over its full length.
2. Square spindle in accordance with claim 1, characterized in that the spring element (3) is formed substantially as an angled element with two limbs (7, 8), which include an angle of approximately 90°.
3. Square spindle in accordance with claim 1 or claim 2, characterized in that the limbs (7, 8) have approximately the same length in a direction transverse to the main axis of the square spindle.
4. Square spindle in accordance with any one of the preceding claims, characterized in that the square spindle (1) is formed as a profiled spindle (2), the cross-section of which has a set back region (5) at that edge (4) at which the spring element (3) is arranged so that the profiled spindle (2) together with the spring element (3) substantially completes the square shape.
5. Square spindle in accordance with claim 4, characterized in that the set back region (5) of the profiled spindle is shaped such that the limbs (7, 8) of the spring element (3) contact the set back region (5) in the region of their outer ends, but the transition region between the limbs (7, 8) is spaced from the profiled spindle (2).
6. Square spindle in accordance with any one of the preceding claims, characterized in that the edge (4) at which the spring element (3) is arranged is rounded off with a radius.
7. Square spindle in accordance with claim 6, characterized in that the spring element (3) is formed as a bent part, in particular manufactured from a sheet metal strip, which forms a radius at the inside in the transition region between the limbs (7, 8) smaller than the mentioned radius of the edge (4) of the profiled spindle (2).
8. Square spindle in accordance with any one of the claims 4 to 7, characterized in that the set back region (5) of the profiled spindle is multiply stepped at both affected side surfaces of the square.
9. Square spindle in accordance with any one of the claims 4 to 8, characterized in that the set back region (5) of the profiled spindle is set back in the direction along the side surfaces of the square and transverse to the main axis of the square spindle by a greater dimension than the length of the limbs (7, 8) in the direction transverse to the main axis of the square spindle.
10. Square spindle in accordance with any one of the claims 2 to 9, characterized in that the angled element (3) has a plurality of projections (20) at the two outer sides of the limbs (7, 8) facing away from the included angle.
11. Square spindle in accordance with claim 10, characterized in that the projections (20) are of substantially diamond-like shape.
12. Square spindle in accordance with claim 11, characterized in that two opposite sides of the diamond-like projection (20) are arranged substantially parallel to the longitudinal edges of the angled element (3).
13. Square spindle in accordance with claim 12, characterized in that the two other sides of the diamond-like projection (20) form an angle of approximately 45° with the longitudinal edges of the angled element (3).
14. Square spindle in accordance with any one of the claims 10 to 13, characterized in that the respective spacing between two adjacent projections (20) in the longitudinal direction of the angled element (3) is approximately exactly as large as the width of a respective projection (20) in the same direction.
15. Square spindle in accordance with any one of the claims 12 to 14, characterized in that the projection (20) is of arcuate shape in a perpendicular cross-section between the two sides extending substantially parallel to the longitudinal edges of the angled element (3).
16. Square spindle in accordance with any one of the preceding claims, characterized in that the profiled spindle (2) has an in particular cylindrical or conical recess (16) at its end faces, and in that the spring element (3) has bent over projections (17, 18) at its ends, which engage into the recess (16) of the profiled spindle (2).

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