EP1749953A2 - Spindle with clamping - Google Patents

Abstract

Square pin (1) comprises recesses distributed on its end regions for receiving a fixing element which enlarges the periphery of the pin. A middle region of the pin connected to the end regions does not have any recesses. Preferred Features: The recesses have the form of a slot extending parallel to or in a longitudinal plane of the pin. The length of the slot corresponds to the length of each section of the pin in the direction of the longitudinal axis of the pin.

Description

The present invention relates to 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 dome 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 that mostly between the square hole in the handle and the square pin an undesirable game is present. This play must be eliminated and the trigger must be fixed to the square pin, so that it can not be wobbled or pulled off when pressed. This setting is often done by clamping or grub screws or transverse to the square pin through this extending pins that protrude into the pusher. A disadvantage of the variants mentioned is the fact that clamping or grub screws as well as fixing pins are visible from the outside in an optically impairing manner after installation, since they must be accessible via the surface of the pusher. In addition, the components mentioned must be handled as separate parts, which often leads to a loss due to their very small size.

Furthermore, an alternative method of fixing by means of a over the entire length of the square pin extending spring element in DE 198 39 815 A1 described. With this method, the above Although disadvantages avoided, but it can not be achieved in the rule no completely play-free setting of the square pin on the handle.

The object of the invention is to improve the conventional design of the square pin, so that the play between pusher and square pin is eliminated, with a use of clamping or grub screws or spreader pins extending to the outside of the pusher should be avoided ,

This object is achieved by a square pin according to claim 1. Accordingly, at least one end region of the square pin is provided with recesses distributed over its circumference, in which at least one fixing element is arranged, which increases the circumference of the square pin in the end region. In this case, the central region of the square pin adjacent to the said end region is free of recesses.

In contrast to the prior art, a plurality of recesses distributed over its circumference are thus provided according to the invention, which allows a significantly improved, backlash-free fixing of the square pin in the pusher through different variants of the invention, which will be explained below. These recesses according to the invention are provided only in one end region or both end regions of the square pin, which improves the production of the square and also its stability compared to such square pins, in which a recess extends over the entire length of the square pin.

Preferably, a plurality of recesses and also in each case at least one fixing element are provided at both end regions. In this case, the square pin according to the invention for carpets can be used. When using for interchangeable or half sets, it is sufficient to provide only one end region a plurality of recesses and at least one fixing element.

The recesses are preferably formed in the form of at least one slot which extends parallel to or in a longitudinal center plane of the square pin. Such a slot can be made in a simple manner by the introduction of a frontal section in the square pin. Preferably, such a slot extends between two opposite surface areas, i. between two edge areas or two side surfaces of the square pin.

The length of the slot in the longitudinal direction of the square pin can correspond approximately to the length of that square section, which can be inserted into the handle neck, as in those square sections, which ultimately do not come to rest within the square socket of the pusher, no recesses or slots are needed. If the slots extend over the entire length of that square section, which can be inserted into the pusher neck, a particularly good, play-free attachment results.

Preferably, two mutually perpendicular slots of the type described above are provided in at least one end region of the square pin, which allows an additional improved backlash-free attachment of the square pin in a pusher.

It is further preferred if at least one end face of the square pin is provided with an axially extending to the square pin bore, which will be explained in the context of the description of the figures.

In a further advantageous embodiment, a square pin is provided with at least one frontal bore into which further transverse to the frontal bore introduced holes open. In this case, the introduced holes are all connected together so that they can be filled by a single injection process with an elastic material, which then protrudes over the transverse holes over the circumference of the square pin and thus provide the desired fixation of the square pin in the pusher can.

A fixing element introduced into an end region of the square pin is preferably formed in one piece, wherein in a first variant of the invention in which the fixing element is designed as a clamping element, it may have a plurality of surface areas projecting from different recesses which can come into contact with the square socket of a pusher.
The integrally formed fixing element can be held in the recesses in the clamping or press fit or by gluing or by deformation of adjoining the recesses areas of the square pin.

A fixing element according to the invention can be produced in a cost-effective manner by means of a casting and / or spraying method and / or introduced into the recesses.

In a first variant of the present invention, the fixing element is - as already mentioned - designed as a clamping element. It is designed for this purpose as an elastomer. Preferably, it completely fills the recesses or slots provided in the square pin and protrudes at a plurality of positions spaced apart from each other over the circumference of the square pin. These protruding portions of the fixing are compressed during insertion of the square pin in a pusher and then cause due to their elastic restoring forces the desired clamping seat of the square pin in the pusher.
The extent to which the clamping element protrudes beyond the circumference of the square pin, can also increase with increasing distance from the front end of the square pin. In this way it is achieved that the square pin with clamping element over a first distance comparatively easy to introduce into a handle approach and only then takes place due to the then increased projection a difficult and thus a secure fit of the square pin in the handle approach ensuring insertion. It is particularly preferred if the clamping element in a short, adjacent to the front side of the square pin portion does not project at all over the circumference of the square pin, so that the initial insertion of the square pin in the handle lug can be done without any resistance.

In a second variant of the present invention, the fixing element is designed as a spreading element, in which case it consists of a rigid material, preferably of plastic, metal or a composite material. It has at least partially on a wedge shape, so that the wedge-shaped portion can be driven with its thinner side advancing the front side into a recess or a slot of the square pin. The wedge-shaped fixing causes then in the respective end region of the square pin a spreading, wherein the degree of spreading is preferably only a few tenths of a millimeter. If a fixing element has a plurality of wedge-shaped sections, a spreading of the square pin can take place in several directions, whereby the clamping seat of the square pin can be additionally improved in a handle receiving.

Both a clamping element and a fixing element designed as a fixing element has in cross-section preferably a cross shape. Alternatively or additionally, a fixing element may also have a cylindrical central portion, from which two, three or four fixing fins extend radially away. In such, designed as a spreading element fixing the Fixierflossenweise each having a wedge-shaped end portion, the width of which increases with increasing distance from the front end of the fixing. Each fins then causes the same when inserting the expansion element in a square pin spreading.

A fixing can be formed resilient in a further advantageous embodiment of the invention, wherein it may consist of plastic or metal. In the case of a fixing element introduced into a square pin, the spring force of the same is preferably exerted radially to the longitudinal axis of the fixing element or of the square. In particular, in relaxed, not yet introduced into a square pin spring element sections thereof over the circumference of the square pin out.

Fig. 1a

eine Seitenansicht eines Vierkantstifts gemäß einem ersten Ausführungsbeispiel;

Fig. 1b

eine Querschnittansicht des Vierkantstifts gemäß Fig. 1a, wobei der Schnitt durch einen Endbereich des Vierkantstifts gelegt ist;

Fig. 2a

eine Seitenansicht eines Vierkantstifts gemäß einem zweiten Ausführungsbeispiel;

Fig. 2b

eine Querschnittansicht des Vierkantstifts gemäß Fig. 2a, wobei der Schnitt durch einen Endbereich des Vierkantstifts gelegt ist;

Fig. 3a

eine perspektivische Ansicht des Endabschnitts eines Vierkantstifts gemäß Fig. 1a und 1b mit eingebrachtem Klemmelement;

Fig. 3b

eine Querschnittansicht des Endabschnitts des Vierkantstifts gemäß Fig. 3a;

Fig. 4a

eine Querschnittansicht eines Klemmelements gemäß Fig. 3a und 3b;

Fig. 4b

eine Querschnittansicht eines Klemmelements, welches bei einem Vierkantstift gemäß Fig. 2a und 2b eingesetzt werden kann;

Fig. 5a

einen Längsschnitt durch einen Drückeransatzes und eine Seitenansicht eines Vierkantstifts gemäß Fig. 3a und 3b mit Klemmelement vor der Montage;

Fig. 5b

eine Ansicht gemäß Fig. 5a, jedoch nach der Montage;

Fig. 6

eine perspektivische Ansicht eines Vierkantstifts mit teilweise eingebrachtem Spreizelement;

Fig. 7a

einen Längsschnitt durch einen Drückeransatz und eine Seitenansicht eines Vierkantstifts mit Spreizelement gemäß Fig. 6 in einem ersten Montageschritt;

Fig. 7b

eine Ansicht gemäß Fig. 7a in einem zweiten Montageschritt;

Fig. 7c

eine Ansicht gemäß Fig. 7a und 7b nach abgeschlossener Montage;

Fig. 8a

eine perspektivische Ansicht eines Klemmelements gemäß einem weiteren Ausführungsbeispiel;

Fig. 8b

eine perspektivische Ansicht eines Vierkantstifts mit eingebrachtem Klemmelement gemäß Fig. 8a; und

Fig. 9

eine Seitenansicht eines alternativen, vorteilhaften Klemmelements, welches anstelle eines Klemmelements gemäß Fig. 5 a, b eingesetzt werden kann.

Further details, advantages and objects of the invention will become apparent from the subclaims and the following description of preferred embodiments, which are explained with reference to the drawings; in these show:

Fig. 1a

a side view of a square pin according to a first embodiment;

Fig. 1b

a cross-sectional view of the square pin of Figure 1a, wherein the section is laid through an end portion of the square pin.

Fig. 2a

a side view of a square pin according to a second embodiment;

Fig. 2b

a cross-sectional view of the square pin of Figure 2a, wherein the section through an end portion of the square pin is placed.

Fig. 3a

a perspective view of the end portion of a square pin of Figure 1a and 1b with inserted clamping element.

Fig. 3b

a cross-sectional view of the end portion of the square pin according to Fig. 3a;

Fig. 4a

a cross-sectional view of a clamping member of FIG. 3a and 3b;

Fig. 4b

a cross-sectional view of a clamping element, which can be used in a square pin according to Figures 2a and 2b.

Fig. 5a

a longitudinal section through a handle lug and a side view of a square pin according to Figures 3a and 3b with clamping element before assembly.

Fig. 5b

a view of Figure 5a, but after assembly.

Fig. 6

a perspective view of a square pin with partially introduced spreading element;

Fig. 7a

a longitudinal section through a handle neck and a side view of a square pin with spreading element of Figure 6 in a first assembly step ..;

Fig. 7b

a view of Figure 7a in a second assembly step.

Fig. 7c

a view according to Figures 7a and 7b after completion of assembly.

Fig. 8a

a perspective view of a clamping member according to another embodiment;

Fig. 8b

a perspective view of a square pin with inserted clamping element of FIG. 8a; and

Fig. 9

a side view of an alternative, advantageous clamping member, which can be used instead of a clamping member of FIG. 5 a, b.

In FIGS. 1a and 1b, a square pin 1 in a first exemplary embodiment is shown in a side view and a cross-sectional view. The square pin 1 has in each of its two opposite end portions recesses in the form of two cross-shaped and mutually perpendicular slots 2, each extending diagonally through an end portion of the square pin 1 between two opposite edge regions. The square pin 1 is frontally with a 3, whose longitudinal axis extends through the line of intersection of the slots 2 and whose diameter is greater than the width of the slots 2. The slots 2 each extend starting from a front end of the square pin 1 over approximately one fifth of the length of the square pin. 1

2a and 2b show a square pin 1 'in a second embodiment according to the representations according to FIGS. 1a and 1b. The square pin 1 'is provided with two likewise cross-shaped slots 2', which now in contrast to Fig. 1 a and 1b each between and perpendicular to two opposite side surfaces of the square pin 1 'extend. The square pin 1 'is here also frontally provided with a bore 3', whose diameter is also chosen larger than the width of the slots 2 '.

3a and 3b, a square pin 1 according to the embodiment of Fig. 1a and 1b is shown, wherein in the slots 2 and the bore 3. a fixing element 4 is made of an elastomer and is held there by clamping or interference fit. The fixing element 4 has a cylindrical central portion, from which four fins distributed uniformly over its circumference extend radially outwards. From Fig. 3b is clearly visible that all four fins of the fixing element 4 project with their end portions at the edges of the square pin 1 over its circumference.

In Fig. 4a, an existing of an elastomeric fixing element 4 is shown in cross-section that can be used for a square pin according to FIGS. 1a and 1b corresponding to Fig. 3a and 3b, while in Fig. 4b also consisting of an elastomer fixing element ' in the Cross section is shown, which is provided for a square pin according to FIGS. 2a and 2b.

In FIGS. 5a and 5b it can be seen how a square pin 1 with a clamping element 4 made of elastomer according to FIGS. 3a and 3b is fastened in a presser neck 5, wherein FIG. 5a shows the state immediately prior to assembly and FIG the assembly shows. Due to the compressed inside of the pusher projection 5 supernatants of the clamping element 4 at the edges of the square pin 1 is formed in the square hole of the handle attachment 5 a clamping action, so that the game between pushers (only the pusher neck 5 is shown) and square pin 4 is eliminated and the pusher is set , In continuation of the assembly beyond the position shown in FIG. 5b addition, the square pin 1 is further inserted into the pusher lug 5 until it abuts the front side at the end of the square socket of the pusher attachment 5.

Fig. 6 shows a further embodiment of the invention. A sectionally wedge-shaped expansion element 4 ", which consists of four fixing fins 6 and a cylindrical central element 7, is partially inserted into the square pin 1 provided with slots 2 and an end-side bore 3 according to Figures la and lb. The fixing fins 6 are shown in FIG. 6 not evidently in each case has a wedge-shaped end section whose width increases with increasing distance from the end face of the fixing element introduced into the slots 2. This wedge shape is therefore not apparent from FIG. 6, because the width of the fixing fins extends only over their longitudinal extent changed a few tenths of a millimeter.

FIGS. 7a-c illustrate by way of example the assembly of a square pin 1 according to FIG. 6.

7a, the expansion element 4 "is only partially inserted into the square pin 1. In this position, the expansion element 4" does not exert any spreading action. The unit of spreader 4 "and square pin 1 is still completely outside of the square pin. 1

According to Fig. 7b, the square pin 1 with the spreader 4 "in the pusher (only the pusher neck 5 is shown) pushed until the spreader 4" abuts the end face of the square socket in pusher neck 5. Until this time, the expansion element 4 "still has no spreading effect.

If the square pin 1 is now inserted further, the expansion element 4 is pushed further into the slots 2 of the square pin 1 at the same time. By the illustrated wedge shape of the fixing fins 6 while spreading the provided with slots 2 end portion of the square pin 1 is effected in all four directions by a few tenths of a millimeter.

According to Fig. 7c, the pusher (only the pusher neck 5 is shown) by means of clamping action by this spreading according to the invention set the square pin 1, wherein any play between square pin 1 and pusher lug 5 is eliminated.

Another advantageous embodiment is shown in Figs. 8a, b drawn. According to FIG. 8a, a fixing element 8, which is made, for example, of plastic or metal, is designed to be resilient substantially transversely to its longitudinal axis with four fins projecting outward from a central section. This is achieved in that the protruding into the slots 2 fins each have recesses 9 and the material of the fins is flexible. As Fig. 8b shows, the outer sections are standing the fins of the resiliently formed fixing element 8 project beyond the circumference of the square pin 1, so that when inserted into a pusher (not shown) the fins are compressed transversely to the longitudinal direction of the square pin 1, so that finally a clamping effect is achieved due to the spring force of the fins.

FIG. 9 shows a clamping element 10 which, for example, can be used in an arrangement according to FIGS. 3 a and 3 b instead of the clamping element 4 shown there.

This clamping element 10 is characterized in that it consists of a total of four designated in Figure 9 with I, II, III and IV sections which adjoin one another in the axial direction of the clamping element 10, said sections with respect to their cross-section and their cross-sectional profile of each other differ.

In sections I, II and III, the clamping element 10 may basically have a cross-sectional shape which substantially corresponds to the cross-sectional shape of Figure 4a, however, in contrast to Fig. 4a, the dimensions of the Fixierflossen 6 'in the different sections I, II and III differ from each other.

In the marked with I end portion of the clamping member 10, which comes to rest in the front end portion of a square pin after installation, the radial extent of the Fixierflossen 6 'is constant and dimensioned so small that the Fixierflossen 6' in fully inserted into a square pin clamping element 10 not protrude beyond the circumference of the square pin. For example, section I may extend over an axial dimension of about 3 mm.

The section I is followed by another section II, whose axial extent can be, for example, about 12 mm. Over the length of section II, the radial extent of the fixing fins 6 'increases continuously with increasing distance from section I.

In the transition from section I to section II there is a sudden increase in the radial extent of the fins 6 ', wherein a radius 12 shown in FIG. 9 is provided in the region of this sudden increase to avoid disturbing edges.

The dimensions of the clamping element 10 in the direction of the double arrow A shown in FIG. 9, that is to say in a direction perpendicular to two opposite side surfaces of a square pin, can be for example 7.9 mm in the region of the section I, in which case a sudden increase this dimensions to the section II out, so that the dimensions in the direction of the double arrow A can be immediately after this erratic increase, for example, 8.05 mm. Over the entire length of section II, the dimensions of the clamping element 10 or the radial extensions of the fixing fins 6 'continuously increase to a value of, for example, 8.2 mm. In the area in which the last-mentioned value is reached in section II, the clamping element 10 merges into a section III whose dimensions in the direction of the double arrow A are constant at 8.2 mm. The axial extent of section III may be, for example, about 5 mm.

At the section III is then followed by a pin 11 whose diameter may correspond, for example, the diameter of the bore 3 according to Figure 3b. The diameter of the pin 11 is thus clear smaller dimensioned than the extension of the clamping element 10 in the direction of the double arrow A in Section III.

If a clamping element 10 according to FIG. 9 is to be coupled with a square whose dimensions in the direction of the double arrow A are for example 7.96 mm, the clamping element 10 with the pin 11 can be inserted particularly easily into a bore 3 according to FIG. 3b , whereupon the fixing fins 6 'are then aligned so that they are aligned with the slots 2 according to FIG. 3b. As a result, complete insertion of the clamping element 10 into the slots 2 of a square pin 1 can take place. When completely introduced clamping element 10 this frontally no longer protrudes from the square pin 1. The fixing fins 6 'are in Section I due to their small size there is not clear about the circumference of the square pin 1. Only at the beginning of section II is there a slight protrusion of the fixing fins 6 ', which continuously increases over the length of section II until the supernatant then remains constant in section III.

When inserting a coupled with a clamping element 10 square pin 1 in a handle approach the installer feels due to the lack of supernatant of the fixing fins 6 'in section I first no resistance during insertion of the square pin. Only when the section II is inserted into the handle lug, a certain resistance is overcome, which increases with continued insertion of the section 2.

If the square pin is then finally fully inserted into the pusher neck, also the section III is completely within the pusher neck, where primarily this section III and in second line and section II provides for a sufficient clamping action between pusher neck and square pin.

LIST OF REFERENCE NUMBERS

1

Square spindle

1'

Square spindle

2

slot

2 '

slot

3

drilling

3 '

drilling

4

fixing

4 '

fixing

4 '

fixing

5

pusher approach

6

Fixierflosse

6 '

Fixierflosse

7

cylindrical central element

8th

fixing

9

recesses

10

clamping element

11

spigot

12

radius

Claims (12)

Square pin, characterized in that at least one of its end regions is provided with recesses (2, 2 ') distributed over its circumference, in which at least one fixing element (4, 4', 4 ") enlarging the circumference of the square pin (1, 1 ') is provided. , 8) is arranged, wherein an adjoining the end region of the central area of the square pin (1, 1 ') is formed free of recesses. Square spindle according to claim 1,
characterized,
in that recesses (2, 2 ') and at least one fixing element (4, 4', 4 ", 8) are provided on both end regions of the square pin (1, 1 ') facing away from one another. Square spindle according to one of the preceding claims,
characterized,
in that the recesses of an end region are in the form of at least one slot (2, 2 ') which extends parallel to or in a longitudinal center plane of the square pin (1, 1'), the slot (2, 2 ') in particular between two extending opposite surface portions of the square pin (1, 1 '). Square spindle according to claim 3,
characterized,
that the slot extends (2, 2 ') between two opposite side faces or edge portions of the square spindle (1, 1'), and / or
that the length of the slot (2, 2 ') in the direction of the longitudinal axis of the square pin (1, 1') corresponds to the length of that square section which can be inserted into a pusher projection (5), and / or
that two perpendicularly oriented slits (2, 2 ') are provided. Square spindle according to one of the preceding claims,
characterized,
in that at least one front-side bore (3, 3 ') is provided, into which preferably a plurality of bores introduced transversely thereto open. Square spindle according to one of the preceding claims,
characterized,
that the fixing element (4, 4 ', 4 ", 8) of an end portion of the square spindle (1, 1') is integrally formed. Square spindle according to one of the preceding claims,
characterized,
that the fixing element (4, 4 ', 4 ", 8) in the recesses (2, 2') in the clamping or press fit or by gluing or by deformation of adjacent to the recesses (2, 2 ') areas of the square pin (1 , 1 '), and / or
is that the fixing element (4, 4 ', 4 ", 8) manufactured by a casting and / or spraying method and / or in the recesses (2, 2') is introduced. Square spindle according to one of the preceding claims,
characterized,
in that the fixing element (4, 4 ') is designed as an elastomer and preferably completely fills the recesses (2, 2') and projects beyond the circumference of the square pin (1, 1 ') at a plurality of spaced-apart positions, wherein in particular the dimension of the Projection with increasing distance from the front end of the square pin (1, 1 ') also increases. Square spindle according to one of claims 1 to 7,
characterized,
that the fixing element (4 ") consists of a rigid material, in particular plastic, metal or a composite material, and preferably at least in sections has a wedge shape. Square spindle according to claim 9,
characterized,
that the wedge-shaped / wedge-shaped section / sections of the fixing element (4 ") is / are introduced with its / their thinner side in front of the recesses or slots (2, 2 ') of the square pin (1, 1'), / / or
in that one end section of the square pin (1, 1 ') is spread open when the fixing element (4 ") is inserted, wherein the extent of the spreading is preferably only a few tenths of a millimeter. Square spindle according to one of the preceding claims,
characterized,
that the fixing element (4, 4 ', 4 ", 8) has a cross shape in cross section is substantially and / or
in that the fixing element (4, 4 ', 4 ", 8) consists of a cylindrical central section (7) from which two, three or four fixing fins (6) extend radially away, wherein in particular the fixing fins (6) each have a wedge-shaped Have end portion whose width increases with increasing distance from the front end of the fixing (4 "). Square spindle according to one of claims 1 to 7,
characterized,
that the fixing element (8) is resilient and made of plastic or metal, wherein in particular with relaxed fixing element (8) portions of the same from the recesses (2, 2 ') over the circumference of the square pin (1, 1') protrude.

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