DE202008013777U1 - joint - Google Patents

Abstract

joint with at least two successive joint elements (1, 2, 3) with connecting parts (4, 5, 6, 7, 8, 9) for fixing or on parts, which hinge elements (1, 2, 3) relative to each other are rotatable and each having a cavity with internal toothing (10; 11, 12) which are arranged one behind the other and by means of at least a cylindrical, axially displaceable locking element (13, 14) with an external toothing (15, 16), with the Internal toothing (10, 11, 12) is engaged, against rotation are secured, wherein the external toothing (15, 16) of the Locking element (13, 14) is so wide that in each case the internal teeth (10, 11, 12) of the at least two connecting parts (1, 2, 2, 3) in the locking position are bridged and from a joint element (1, 2, 3) completely in the adjacent is displaceable, and the locking element (13, 14) of a Compression spring (17, 18) on one side and on the other side from a sliding pestle or one Pushbutton (19) is supported, ...

Description

The The invention relates to a joint with at least three consecutive lying joint elements with the in the preamble of the claim 1 specified characteristics.

From the DE 299 04 833 U1 a rotary joint with locking coupling for pivotally connecting at least two parts is known, the at least one first pivot member having a concentric internal toothing and at least one provided on the outer wall fastening device for fastening at least a part or for attachment to a first part and at least one second pivot with a Having concentric internal teeth and at least one provided on the outer wall fastening device for the attachment of at least a second part or on a second part. Both rotary joint elements are connected to each other and rotatable relative to each other. A meshing with the internal teeth and axially displaceable herein meshing gear, which in a first position, the two internal gears coupled together and in a second axial displacement position against the force of a spring out of engagement with the teeth occurs is also provided. The gear wheel is displaceably arranged in both axial directions from a center position coupling the two internal gears into a disengaging position, actuating elements which are arranged axially on both sides of the inner ring of the gear and protrude axially from the end faces of the rotary joint elements. These are push-button elements, wherein the push-button elements can act on the coupling gear also via interposed springs.

From the US 5,056,805 . 3 , A rotary joint with locking coupling is known, which is used for tilt adjustment of a push bar on a stroller. For this purpose, a rotary joint at the same height is provided on the two-sided sliding beams of the stroller, each with a fastener to a spar and with the second fastener attached to one end of the handlebar. But such joints can also be provided for example for swivel footrests on such stroller or on a swivel carrying handle on a baby carrier. The areas of application are varied and not limited to pushchairs. For example, such hinges can also be used for the adjustment of the backrest of a chair. The present invention includes all fields of application.

A joint, in particular for musical instruments such as drums and percussion stand material, which consists of two mutually rotatable rotationally symmetrical bodies, each having internal toothing, which are interconnected by a sprocket, is further from the DE 84 00 753 U1 known.

A joint with three joint elements is made of DE 195 30 717 C2 known. This joint has connecting parts for fastening mutually adjustable parts and releasable locking of the connecting parts against each other, wherein the connecting parts have a circular cross-section cavity, which is provided with an internal toothing. The cavities of the connecting parts are arranged in alignment one behind the other. In the common cavity, a cylindrical locking member is disposed axially displaceably, which is provided at its periphery with an external toothing, which brought fully into engagement with the internal teeth of the connecting parts who can. The toothing of the locking part engages in the locking position in the internal teeth of two adjacent connection parts. On the one side of the locking part a compression spring and on the other side a push button is supported. There are at least three consecutive connecting parts with cavity and internal teeth provided. On the side facing the compression spring side of the locking part or on the push button unlocking facing side of the locking part a spacer is arranged. Although it is provided in a design for a baby rocker or the like, that the non-interlocking connecting parts on the facing end faces have corrugations to complicate or prevent relative adjustment, but these parts can not be relatively adjusted against each other, as that between the other parts by moving the locking part is possible.

Of the Invention is based on the problem that all known swivel joints With locking couplings are designed so that only when you press the push button or a plunger, for example, over a disc actuator is operable in the depressed Condition, a relative rotation of the joint elements possible is or a rotation of the outer joint element against an interposed joint element possible is. This requires a high degree of skill of the Operators, for example, attached to the side of prams Unlock joints simultaneously to pivot parallel sure. Even if the hinges are bigger are formed and, for example, for the coupling of Conductor elements used requires such adjustment a high level of skill of the operator.

outgoing The invention is based on the object of the prior art to develop a joint of the generic type and to provide with means that relegate a relative Joint element opposite the other without holding down the plunger or the button allows.

The Invention solves the problem by designing the joint according to the specified in claim 1 technical Teaching. Advantageous developments of the invention are described in the subclaims Detail specified.

The inventive solution provides that the plunger or the push button in the retracted position by means of a releasable locking device on the joint element can be fixed. As a result, the locking element moved to a desired disengaged position and in this is also held, so that the hinge elements against each other can be adjusted without the pushbutton or the plunger to hold down with one finger. Only when the desired angular position is taken, the locking device is actuated, thus the ram operatively connected therewith or the push button is released, so that against the force a spring displaced locking element pushed back into the locking position can be. At the same time the plunger or the pushbutton by a defined stroke within the storage pressed the hinge element to the outside.

The Locking device may be formed differently. In one embodiment, it is provided that in the pushbutton, extending transversely to the sliding direction, a sliding element in a bearing recess is slidably mounted, which sliding element while depressed Button engages behind a locking approach, which consists of a guide wall projecting within the joint element, or in a recess can be inserted in a wall. The sliding element may be an actuating lug and at least in the locking position, in the one Detent approach engages under Arretierungsansatz or engages in a recess, be secured against unintentional displacement latching. The sliding element but can also have a latching projection with a latching slope and be slidably mounted against the force of a spring, wherein the edge of the Arretierungsansatzes on the locking slope the sliding element radially displaces and the compression spring the locking projection after sliding over of the locking lug automatically slides under these. In the simplest version, the sliding element but also have transverse rounded ridges, which in transverse grooves engage, wherein the wall thicknesses are formed so that Guaranteed by inherent elasticity the detent is. This makes it practically possible, the sliding element to move into a locking position and out of this too to pull out again without having to place any additional springs Need to become.

According to one In another embodiment, a bearing chamber can be provided in the joint element be provided for a sliding element that over a frontally projecting grip area radially to the push button or is displaceable to the plunger. This sliding element can with a detent into a recess in the plunger or the pushbutton with the pushbutton pushed in or the pushbutton or spread the plunger in the pressed state. Furthermore, it can be provided that the sliding element against the force of a spring is displaceable and / or with a Arretierungsansatz in a locking recess in the end wall of the joint element engages in the locked position, which is held secured. By applying pressure on the Arretierungsansatz against the power of an interlocking Spring locks the Arretie approach and gives the sliding element free for the sliding movement.

When Locking device can on the plunger or on the jacket wall or a jacket wall section of the pushbutton be provided an approach that in a heart curve in the storage wall of the joint element is guided. When pressure on the plunger or the key snaps into a heart trap. By pressing again, while minor Rotation of the pushbutton or plunger slides the approach out of the heart curve trap and gives the return path for the locking element and the push button or the Pestle free.

The Invention can also be applied to multi-joint joints, z. B. when three hinge elements via two locking elements connected together form a joint. In the event that four or five Joint elements form a joint, is a corresponding number, So always one locking element less than hinge elements, provided. The two locking elements are relative to each other or slidably arranged together so that they are either common or independently in an unlocked position or locking position can be brought to which Purpose on at least one of the lateral hinge elements a displaceable Tappet for disengaging and pushing in of the locking element or a push button is provided.

But it is also possible by transferring the displacement forces by means of compression springs between the individual parts and by appropriate dimensioning of the springs or by interposing a spacer with a Teleskopfüh tion, which works against a spring to provide the control of Verrieglungselemente so that initially only one locking element is inserted into an unlocking, ie from the internal teeth connec Denden position in the cavity of a joint element with internal teeth and only then by further shifting to a defined Path through the spacer, the next locking element is moved so that the third lateral joint element is relatively rotatable. In the event that a simultaneous displacement of the locking elements takes place and they have taken the unlocked position, all three hinge elements are rotatable relative to each other.

If several joint elements are provided, so the individual Joint elements after disengagement of the locking elements from the locking positions to the release positions as well be pivoted. It can be seen that by such a locking joint Parts in different positions to each other easily fixed can be.

To the Purposes of moving the locking elements is provided that each of the two outer hinge elements one axially displaceable plunger or a pushbutton so as to face the outer hinge elements unlock and swivel the next one as needed to be able to. The locking elements are thus at this Execution independently movable. If a coupled shift is to be ensured, then is one-sided on one of the outer joint elements a plunger or a push button stored at the actuation of the locking elements simultaneously or subsequently slidable, so that either all hinge elements are relatively adjustable or only an outer first Joint element opposite to the next joint element, z. B. the central, and then this opposite the third Joint element, for. B. the outer. The same Mechanics can also be used if several joint elements (four, five, six or more) are strung together. requirement for a sequential control, however, that at a possible subsequent unlocking the cavities sufficient are deeply dimensioned and thus the internal gears to the to realize longer displacement paths, since the locking elements successively from the locking position to the unlocked position have to be spent. If a parallel shift is provided, the cavity depth of all joint elements of Be adapted width of a locking element. The width of the Locking elements is so big to choose that both locking elements in the locking position both in the internal toothing of the central joint element as well as in the internal toothing of the outer joint elements engage, whereby a movement transformation of a connection part is excluded to the other. However, the joint elements should have one such cavity and such internal teeth have that the locking elements are so far displaced that they except Engage with the teeth of the adjacent joint elements and in the recess of the next hinge element can be fully pushed in to to release the rotation.

The Articulated elements have at the Mantelwandungen approaches or a storage due to their round structure in one Bearing ring of the next hinge element used are. The tongue-shaped lugs secure the composite and ensure the twistability. Another backup can be effected by a central bore, the is introduced in bearing journal, the entire composite by means of screw or rivet bolt is held together. The journals are included on the outside end walls of the outside Articulated elements projecting inwards and in the middle Joint element formed on a partition wall. partitions, especially in the central joint element, prevent power transmission from a pushbutton or a locking element to the next. To ensure the power transmission is a spacer interposed, with guide pins in holes is guided in the partition so that over here the power transmission to the next locking element is ensured. To a return movement of a locking element from the cavity of the central hinge element into a locking position to effect, in which the adjacent internal gear teeth connected together are, so the engagement of the external teeth in the internal teeth the adjacent joint elements, it is appropriate to place a compression spring centric on the bearing journal, which is with one end to the bulkhead and the other end to the spacer supports, against the inside end face the locking element presses and then when the plunger or the pushbutton is returned or pushed out, automatically the locking element in the lateral hinge element pushes the gearing, thereby ensuring the locking position is. A pressure spring located thereafter can do this Take care that a complete insertion into the Cavity is not possible. However, if this is desired, the sizing must be done so that it is possible if necessary is.

A push button is known to have a cylindrical shape. So that in a leadership or separation wall, the tongue-shaped projections can be performed, the storage walls or partitions corresponding segmental free cuts through which the tongue-shaped projections can be inserted. In order to avoid unintentional withdrawal, the tongue-shaped projections can have latching lugs at their ends, which can engage behind the cut wall sections in order to prevent them from being pulled off. Incidentally, the end faces rest on the transmission elements or connecting elements. Of course, it can also be provided that the push button against the force of a spring is adjustable and cooperates with a locking mechanism, so that in the retracted position is given a self-holding, that is, that the locking elements are held in the unlocked position. To release a new pressure is required so that the push button, for example, controlled by a heart curve, automatically reset and the locking elements can take the locking position. The principle is well known from ballpoint pens. By the storage wall, which is provided as a partition wall in the central hinge element, the central hinge element is divided into two halves, wherein one half of the depth is at least as large as the width of the locking element, which is to immerse it for unlocking. On the other hand, the depth may be less, since with simultaneous displacement or successive displacement of the locking elements into the cavities for unlocking the central joint element, the locking element must be pushed into the cavity of the lateral, located behind hinge element. An attached between the last connecting element and the bearing wall pressure spring then ensures that the locking element is automatically returned to the locking position when the push button is extended or the plunger is withdrawn. For plunger in the invention, any form of an axially displaceable component, which can be spent, for example via a toggle lever or a pivot lever in two positions. Here are manifold embodiments.

One Spacer, which is designed as a telescope holder, usually consists of two perforated discs. On the one disc are on the ring pin, on the other disc, however, pins with longitudinal guides, in the corresponding pin can be inserted into the other ring. In order to prevent simultaneous displacement of the locking elements is given, the springs used are dimensioned so that First, insert the pins into the guide holes to enable a given stroke before over the ring the power transmission to the following, spring-loaded Locking element takes place. The guide pins themselves are stored in holes in the partition wall.

The individual joint elements have connecting parts, which accordingly the purpose of use are formed. The joint elements are together with the connecting parts made of plastic, can one-piece or multi-part formations are made, wherein in the latter case, the cup-shaped parts with each other Latch or screw to connect to such a hinge element to build. As connecting parts usually come cylindrical Connection parts into consideration, for example, the tube of a Stroller frame or the tube of a rocker or the spar a ladder can be inserted. With the parts can then be placed over Drilling a screw connection made. But it is also possible to provide a catch to hold the inserted parts. Also, the connecting parts may be formed as a pin, are then placed on the appropriate hollow body. The hollow bodies can be rod-shaped or be attached to other components. It is obvious that not only tangentially or radially extending, sleeve-shaped Connecting parts can be provided, but also axially extending, ie in the longitudinal axis direction of the joint extending sleeves, which serve to receive parts, for example ladder steps. These sleeves can be one-piece or two-piece be executed. In the second embodiment can the individual sleeve parts when enclosing a Partly assembled and connected together. Also, both axial bearing sleeves and be provided tangential or this within a joint be combined with each other.

The Training of the joint according to the invention allows a modular construction, so that the joint elements individually as shell body made of plastic and then optionally with the other joint elements can be combined. The bowls are at the edges designed so that they nestled and / or self-holding are rotatably connected to each other. The composite can by a additionally secured by central screwed or riveted bolts become. This is only required if higher loads occur. To ensure the displacement paths, the central Joint element be twice as wide as the lateral Joint elements. Various modifications are easy to implement.

The Invention is described below with reference to the drawings Embodiments explained in addition.

In show the drawings:

1 in an exploded view the essential individual parts of a joint element with a pushbutton,

2 a side view of a mounted joint element,

3 a sectional drawing through the in 2 shown hinge element along the section line AA with unactuated pushbutton,

4 a sectional drawing through the in 2 shown joint element along the section line AA with actuated pushbutton,

5 in an exploded view, the individual parts of a three-part joint in a first embodiment, in which the locking elements are arranged parallel within the joint displaceable,

6 an exploded view of a variant of a joint according to 5 in a second embodiment with a separate adjustment of the individual joint elements by appropriate design of the locking elements and the coupling elements,

7 a perspective view of a third embodiment of a joint with both sides mounted in the outside hinge elements pushbuttons,

8th a composite joint with sleeve-shaped connecting parts on the lateral joint elements and an axial longitudinal receptacle on the central joint element of a three-part joint,

9 a variant in which all connecting parts have axial receptacles,

10 a variant with two axial bearing sleeves on the lateral hinge elements and a tangential, sleeve-shaped connecting part on the central joint element and

11 an application example for connecting spars, z. B. Rungs of ladders.

In 1 is a joint element 3 a multi-jointed joint shown. On the housing shell of this joint element 3 is a connection part 6 molded. The joint element with connection part consists for example of plastic. On the front side a bearing recess is provided, which passes through a bearing wall 36 is limited. This storage wall 36 has slotted bearing points 25 for receiving the bearing tongues 26 at the pushbutton 19 on. The pushbutton 19 has a bearing recess 42 with corresponding guides for receiving a sliding element 43 put in the push button and in it, like out of the 3 and 4 it can be seen against the force of a compression spring 44 is displaceable.

The back is the locking element 14 in the form of a toothed wheel with external teeth 16 shown. This gear has, as from the 3 and 4 also can be seen, a bearing recess 45 in which a compression spring 18 can be used, which is located on the annular wall of the spacer 20 supports, the guide pins 27 rear and front bearing pins 35 for forming the bearing for the compression spring 18 having. The function and meaning of these elements will be explained later on the basis of 5 ff described. Essential to the invention is the sliding element 43 that in the push button 19 what's up 2 is apparent.

From the sectional drawings in the 3 and 4 is the mode of action of the sliding element 43 seen. In 3 is the locking element 14 in the locking position. It engages with the external teeth 16 both in the internal teeth 12 of the joint element 3 in as well as in an unillustrated In nenverzahnung an attached joint element. This position contains the pushbutton 19 from the plane of the joint element 3 out. Likewise, it can be seen that the sliding element 43 with a latching slope above a locking ring or Arretierungsansatzes 48 protrudes. The storage tongues 26 are in the campsites 25 guided and grab on the front side of the locking element 14 , The at the storage tongues 26 molded locking lugs 36 engage wall sections behind the bearings 25 , so that a deduction is given. Now go to the pushbutton 19 pressed, then comes the catch slope 47 in engagement with the edge of the locking lug 48 and is against the force of the inserted spring 44 moved down and slides out like 4 can be seen, automatically under the Arretierungsansatz 48 , At the same time, the locking element 14 shifted so far that the external teeth 16 out of engagement with the internal teeth 12 of the joint element 3 reaches, so that it is rotatable relative to the counter element, not shown. The locking element 14 is thus completely inserted into the internal toothing of the joint element, not shown. Will now be the sliding element 43 again moved by hand, so can the in 1 illustrated compression spring 18 the locking element 14 with the external teeth 16 in the internal toothing 12 insert it safely, with the pushbutton at the same time 19 is pushed out.

In 5 is an exploded view of a joint according to the invention shown in fol ing parts consists of: a first joint element 1 , which is mounted on the left side, a second joint element 2 , which is mounted centrally, and a third hinge element, which is mounted on the right side. As can be seen from the illustration, these are cup-shaped plastic parts, wherein the central joint element 2 wider than the lateral joint elements 1 and 3 ,

The left-hand first joint element 1 has inside the cavity defined by the shell shape an internal toothing 10 on. Further, it has on the outside inwardly projecting a journal 22 with a through hole 31 on. The internal toothing 10 is firmly attached to the housing wall. On the bearing journal 22 is a compression spring 17 placed, which is supported on the rear end wall. There are also tongue-shaped approaches 32 arranged distributed on the circumference of the round housing, which when joining two hinge elements 1 . 2 ; 2 . 3 immerse in the housing shell of the next hinge element in a guide ring and allow relative rotation. Furthermore, a connection part 4 on the joint element 1 formed. This connection part 4 is sleeve-shaped, so that for example a pipe can be inserted and screwed. A transverse bore 33 allows attachment of the tube in the sleeve of the connection part 4 by means of a screw.

When joining, the first joint element 1 with the tongue-shaped lugs 32 - Instead of which can also be provided a bearing ring - in a corresponding, corresponding receptacle on the second joint element 2 used. It can also be provided a trigger guard. The arrangement of the approaches 32 allows relative rotation of the two joined joint elements 1 and 2 , In between is a compression spring 17 introduced on the center pivot 22 is plugged and back in the joint element 1 supported and with the other end in the locking element 13 is stored, which has an external toothing 15 has, in the internal toothing 10 partially engages while through the compression spring 17 the remaining part of the external toothing 15 in the invisible internal teeth on the back of the central joint element 2 dives in, to the stop.

It can be seen that by bridging the two internal teeth by the locking element 13 a firm connection between the two hinge elements is made in the assembled state. A relative twisting against each other is practically impossible. This is only possible if the locking element 13 completely into the cavity of the first joint element 1 is pushed in, against the force of the spring 17 , Then comes the external teeth 15 out of engagement with the internal toothing of the joint element 2 and only meshes with the internal teeth 10 of the joint element 1 , In this position is a relative rotation of both joint elements 1 and 2 possible against each other. The specified here gearing is uniform throughout. But it can also different tooth pitches with respect to the joint elements to be joined 1 and 2 respectively. 2 and 3 be provided. As a result, a finer or a coarser Rastabstimmung be achieved in the setting.

The central joint element 2 has two lateral cavities through the shell formation, by an inner partition, which serves as a bearing wall for the journal 23 serves, are separated from each other. This makes it possible in principle to provide the sprockets used in the different chambers with different tooth pitches. You only need to have the same pitch as the inner ring gears of the assembled joint elements 1 . 2 ; 2 . 3 at the respective side. In approximately tangential is also on the joint element 2 a connection part 5 provided in sleeve form. The part 5 is according to the connection parts on the first joint element 1 trained, so that a further description is unnecessary. On the back side of the Ge steering element 2 are not tongue-shaped approaches 32 provided for rotatable mounting, but a non-visible annular recess into which the lugs 32 plunge. On the right side of the visible side are again such tongue-shaped bearing approaches 32 provided in a bearing ring in the third, namely the right hinge element 3 , engage to allow relative rotation. The lugs may also be locking lugs, which have hedges, engage behind the guide rings. An additional safeguard by means of a screw or rivet bolt 34 can be provided.

The representation in 5 further shows that a spacer 20 is provided, which consists of a ring made of plastic and the back guide pins 27 has, all of the same length and by non-visible guide openings in the partition wall within the joint element 2 are guided. The rear end faces are supported on the end face of the locking element 13 from. Front are on the ring projecting bearing ribs 35 provided, which are arranged so that they are capable of a compression spring 18 absorb the height of the bearing ribs. The spacer 20 is with the center hole of the ring on the journals 23 put on and pushes with the rear end faces on the guide pins 27 against the end face of the locking element 13 , The feather 18 moreover, push that locking element 14 with the outer ring gear 16 in the invisible internal toothing 12 in the joint element 3 , wherein the width of the locking element 14 or the outer ring toothing 16 so large is chosen that part of the external teeth 16 from the plane of the internal gear rim 12 protrudes, so this part when joining the hinge elements 2 and 3 in the internal toothing 11 of the joint element 2 intervenes. This ensures a non-rotating position. The depth of the cavity with the Innenkranzver toothing 11 is chosen so large that the locking element 14 can completely submerge when unlocking is desired. In this position, then a relative adjustment of the hinge elements 2 and 3 take place in different rotational positions against each other.

Furthermore, from the illustration in 5 seen in a storage wall 36 , which is provided recessed, a bore is visible, extending through a bearing pin, not shown 24 extends and with the holes in the journals 22 . 23 forms a continuous connection bore. Furthermore, it can be seen from the illustration that bearing points 25 are provided, namely free cuts, in which the on the push button 19 rear protruding bearing tongues 26 can be used. The walls are thereby of the hook-shaped locking elements at the end of the bearing tongues 26 engaged behind, so that a withdrawal is not possible.

The composite composite can by a screw or rivet pin 34 additionally secured. Only when the pushbutton 19 is pressed, a movement transformation takes place on the locking element 14 against the force of the spring 18 , At the same time or a short time later, the end faces of the bearing ribs grip 15 against the back of the locking element 14 so that the spacer 20 within the second hinge element 2 is moved. The force is thereby on the locking element 13 transferred, against the force of the return spring 17 in the cavity of the first joint element 1 dips. The paths can be dimensioned so that when fully inserted the push button 19 both locking elements 13 . 14 completely in the next inner ring gears 10 . 11 the next joint elements 1 . 2 immerse so that all three hinge elements 1 . 2 and 3 are relatively rotated against each other. A heart curve design allows the pushbutton 19 be held in this position too.

But it can also be provided that only during the operation of the push button 19 a twist is possible. The pivoting path may extend beyond 360 ° or be limited by stops. Is the pushbutton 19 again released or returned, so cause the two springs 17 . 18 a provision of both the locking elements 13 . 14 as well as the spacer 20 and spend them in the locked position. At the same time the push button will turn 19 advanced again and forms an integral part of the outer joint element 3 what for example from the 8th . 9 . 10 and 11 is apparent.

This in 6 illustrated embodiment differs from the in 5 only in that here is a separate adjustment of the joint elements by a special design of the spacer 21 is achieved. Incidentally, the components are completely identical to those in 5 and made of plastic - with the exception of the springs - so that a description in detail is unnecessary. It is therefore due to the execution in 5 directed. Only the deviations are described below.

In 6 is a spacer 21 shown. This spacer 21 has guide pins 27 in the form of hollow pins, for example, in a partition wall in the second joint element 2 can be stored. These hollow pins simultaneously provide a guide for the at a back of the support ring 30 attached bearing pins 29 , The guide pins 27 are in Lagerdurchbrüchen in the partition wall within the second joint element 2 guided. These are the bearing pins 29 on the support ring 30 used. Previously, however, are in the holes within the guide pins 27 compression springs 28 used, whereby a certain movement stroke of the bearing pins 29 in the holes against the force of the springs 28 is possible. The guide pins 27 are also on a ring with center hole for mounting on a journal 23 of the second joint element 2 appropriate. On the front side there are bearing ribs 35 before, which form a bearing for a compression spring.

In the embodiment, the compression spring 18 however, between partition in the hinge element and the back of the support ring 30 of the spacer 21 inserted to the spacer 21 to move to a starting position, leaving over the bearing ribs 35 also the locking element 14 with the external teeth 15 in the internal teeth, not shown 12 in the joint element 3 can dive.

It can be seen that in the assembled state by pressing the pushbutton used 19 a pushing force on the locking element 14 is transmitted. This locking element 14 is doing from the internal toothing of the joint element 3 pushed out and immersed in the internal teeth 11 of the second Ge guiding element 2 completely one, leaving the joint element 3 opposite the joint element 2 can be completely twisted. When moving but also the spacer 21 shifted, against the force of the compression spring 18 , This gets the support ring 30 against the front end side of the locking element 13 , In consequence, as the spring force of the compression springs 28 less than that of the compression spring 17 , the bearing pins 29 in the bearing holes of the guide pins 27 inserted up to the stop, in which position also the outer ring toothing 15 of the locking element 14 out of engagement with the internal teeth 12 within the joint element 3 arrives. If moreover, now the pushbutton 19 is actuated automatically shifts the locking element 13 against the force of the spring 17 and enters completely into the cavity of the joint element 1 and glides into the internal gearing 10 , In this displacement position so also the joint element 1 completely opposite to the central joint element 2 to be twisted. Because of the connecting parts 4 and 6 are formed so that they the outer jacket wall of the joint element 2 overlap, a 360 ° pivoting is possible.

Now the pushbutton 19 released, so causes the compression spring 17 in that both the locking element 13 moves back into the locking position, as well as the spacer 21 is moved to the starting position. The provided compression springs 28 move the bearing pins 29 within the bearing bore in the guide pins 27 in an outer position and are supported by the compression spring 18 that stick to the inside of the spacer 21 supported. Through the attached to the ring of the spacer bearing ribs 35 becomes the locking element 14 in the internal toothing 12 in the joint element 3 pushed. The depth is such that the collar protrudes and in the internal teeth 11 remains, so that a backup against relative rotation of the two parts is given. The composite of the individual parts is also by the screw or rivet bolt 34 held together in the holes in the journals 22 . 23 . 24 is introduced.

Another embodiment is shown in an exploded view in FIG 7 shown. This differs from the embodiments in the 5 and 6 in that both the left and the right hinge element 1 . 3 each with a pushbutton 19 is equipped so that when actuated, the two hinge elements 1 . 3 independently of each other relatively rotatable bar relative to the central joint element 2 are. From the 7 is in particular from the left part of the guide ring 38 evident in the the approaches 32 on the jacket wall of the joint element 2 can dive. Furthermore, there is a storage wall 36 clearly visible and the storage point provided therein 25 for receiving the bearing tongues 26 the pushbutton 19 with their protrusions protruding at the lower ends 37 , These Rastanformungen 37 are locking lugs, which are the storage wall 36 in the field of bearings 35 engage behind. Furthermore, the shape of the locking element 13 visible, noticeable.

This has namely an end face and a receiving bore into which a compression spring 17 can be used, which is located on the partition wall within the joint element 2 supported. After joining the parts, you can press the left pushbutton 19 or the right-hand pushbutton 19 in each case the locking elements 13 and 14 from their locking positions against the force of the springs 17 and 18 be moved and completely into the internal gears 11 of the joint elements 2 plunge. In this case, an unlocking is given, so that a relative rotation of the outer joint elements 1 . 3 opposite the middle joint element 2 or the middle joint element 2 opposite the outer joint elements 1 . 3 is possible. With the release of the pushbutton 19 , that is, no more pressure on the push button 19 takes place, press the compression springs 17 respectively. 18 the locking elements 13 respectively. 14 back to their locking positions, where the internal gear teeth 10 . 11 respectively. 11 . 12 be connected to each other.

8th shows an example of a composite joint according to the invention, consisting of three joint elements 1 . 2 . 3 with the connection parts 4 . 6 on the lateral joint elements 1 . 3 , which are designed sleeve-shaped and are mounted substantially tangentially. At the central joint element 2 however, is a holder with an axially extending bearing sleeve 8th attached, so a transverse to the bearing sleeves 4 and 6 running bearing sleeve provided.

9 shows a variant of the example in 8th , Here are also on the outer joint elements 1 . 3 End parts in the form of axial bearing sleeves 7 . 9 intended. Such an arrangement can be used for example for connecting rungs of a ladder or for the connection of bars.

The execution in 10 differs in that in addition to the axial bearing sleeves 7 . 9 on the outer joint elements 1 . 3 on the central bearing element 2 a tangential bearing sleeve 5 is provided as a connection part.

11 shows an example, as by means of a joint after 9 three parts 39 . 40 . 41 can be connected to each other. This example shows that, for example, adjustable ladders through these joints a quick, easy adjustment is given and at the same time a high level of security.

The Areas of application of a joint according to the invention are versatile. Depending on size and resilience These can be used, for example, for ladders, for support structures Different types, for the attachment of push rods on stroller frames or on sliding devices par excellence Scaffolding and other frame structures are used. The application areas extend practically to all areas, in which locking joints or joints with couplings are used can.

1

joint element

2

joint element

3

joint element

4

connector

5

connector

6

connector

7

Connector / bearing sleeve

8th

Connector / bearing sleeve

9

Connector / bearing sleeve

10

internal gearing

11

internal gearing

12

internal gearing

13

locking element

14

locking element

15

external teeth

16

external teeth

17

compression spring

18

compression spring

19

pushbutton

20

spacer

21

spacer

22

pivot

23

pivot

24

pivot

25

bearings

26

bearing tongues

27

guide pins

28

compression springs

29

bearing pins

30

supporting rings

31

Through Hole

32

approaches

33

drilling

34

Screw / rivet bolts

35

bearing pins

36

bearing wall

37

Rasta shaping

38

guide ring

39

part

40

part

41

part

42

bearing recess

43

sliding element

44

compression spring

45

bearing recess

46

locking lugs

47

Rest slope

48

locking lug

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 29904833 U1 [0002]
• - US 5056805 [0003]
• - DE 8400753 U1 [0004]
• DE 19530717 C2 [0005]

Claims (14)

Joint with at least two successive joint elements ( 1 . 2 . 3 ) with connecting parts ( 4 . 5 . 6 ; 7 . 8th . 9 ) for attaching or on parts, which hinge elements ( 1 . 2 . 3 ) are relatively rotatable relative to each other and each having a cavity with internal toothing ( 10 ; 11 . 12 ) arranged one behind the other and by means of at least one cylindrical, axially displaceable locking element ( 13 . 14 ) with an external toothing ( 15 . 16 ), which with the internal toothing ( 10 . 11 . 12 ) are engaged, secured against rotation, wherein the external toothing ( 15 . 16 ) of the locking element ( 13 . 14 ) is so wide that in each case the internal teeth ( 10 . 11 . 12 ) of the at least two connecting parts ( 1 . 2 ; 2 . 3 ) are bridged in the locking position and from a joint element ( 1 . 2 . 3 ) is completely displaceable in the adjacent, and the locking element ( 13 . 14 ) of a compression spring ( 17 . 18 ) on one side and on the other side of a displaceable plunger or a pushbutton ( 19 ) is supported, characterized in that the plunger or the pushbutton ( 19 ) in the retracted position by means of a releasable locking device on the joint element ( 3 ) is fixable. Joint according to claim 1, characterized in that extending in the pushbutton, transversely to the sliding direction, a sliding element ( 43 ) in a bearing recess ( 42 ) is slidably mounted, which sliding element ( 43 ) with the key pressed, a locking approach ( 48 ) engages behind, which consists of a guide wall within the joint element ( 3 ), or in a recess in a wall can be inserted. Joint according to claim 2, characterized in that the sliding element ( 43 ) has an actuating projection and on at least in the Verriegelungspositi on, in which a locking projection engages under the Arretierungsansatz or engages in a recess, is secured against unintentional displacement detent or that the sliding element ( 43 ) has a latching projection with a latching slope and against the force of a spring ( 44 ) is slidably mounted, wherein the edge of the Arretierungsansatzes ( 48 ) via the latching slope, the sliding element ( 43 ) radially displaces and the compression spring the locking projection after sliding over the Arretierungsansatzes ( 48 ) automatically shifts under these. Joint according to claim 1, characterized in that in the joint element ( 3 ) A bearing chamber is provided for a sliding element, which is displaceable over a frontally projecting handle portion radially to the push button or to the plunger and that the sliding element engages with a detent into a recess in the plunger or pushbutton with inserted pushbutton or engages over the pushbutton or the plunger , Joint according to claim 4, characterized in that the sliding element is displaceable against the force of a spring and / or with a Arretierungsansatz in a Arretierungsausnehmung engages in the end wall of the joint element in the locked position and by applying pressure to the Arretierungsansatz against the force of a spring for the sliding movement unlocked is. Joint according to claim 1, characterized in that as locking means on the plunger or on the jacket wall or a jacket wall portion of the push button, a projection is provided which in a heart cam in the bearing wall of the joint element ( 3 ) is guided and that when pressed on the plunger or the key of the approach engages in a cardiac trap and by pushing out, while slight rotation of the push button or the plunger, the approach slides out of this. Joint according to claim 1, characterized in that - at least three successive joint elements ( 1 . 2 . 3 ) are provided, - that at least two locking elements ( 13 . 14 ) are arranged displaceably relative to one another or with one another or following a defined displacement path against the force of a spring, - that each of the two outer hinge elements ( 1 . 3 ) a displaceable plunger or a pushbutton ( 19 ), upon actuation of which the locking elements ( 13 . 14 ) are independently displaceable, or - that on one side on one of the outer joint elements ( 1 . 3 ) a plunger or a pushbutton ( 19 ) is mounted, upon actuation of the locking elements ( 13 . 14 ) are slidably mounted simultaneously or successively, and - that the width of the locking elements ( 13 . 14 ) is so large that both locking elements ( 13 . 14 ) in the locking position both in the internal toothing ( 11 ) of the central joint element ( 2 ) as well as in the internal toothing ( 10 . 12 ) of the outer joint elements ( 1 . 3 ) and are displaced so far that they disengage from the teeth ( 10 . 11 . 12 ) of the adjacent joint elements ( 1 . 2 . 3 ) reach. Joint according to claim 1, characterized in that - between the two locking elements ( 13 . 14 ) a rigid spacer ( 20 ) or a telescopic spacer ( 21 ), that the ram or the pushbutton ( 19 ) directly on the front side of the associated locking element ( 14 ), - that in a disengaged position of the pushbutton ( 19 ) the associated locking element ( 14 ) in the internal toothing ( 12 ) of the joint element ( 3 ) and the central joint element ( 2 ) engages, - that the further locking element ( 13 ) by a compression spring ( 17 ) on the joint element ( 1 ) is supported on the other side, such that it is in both the internal toothing of the joint element ( 1 ) as well as in the central joint element ( 2 ) and that by inserting the plunger or the pushbutton ( 19 ) both locking elements ( 13 . 14 ) simultaneously or successively against the force of the compression spring ( 17 ) are displaceable and the gear ( 16 ) of the locking element ( 14 ) out of engagement with the internal toothing ( 12 ) of the lateral joint element ( 3 ) and the other gear ( 15 ) of the locking element ( 13 ) out of engagement with the internal toothing ( 11 ) of the central joint element ( 2 ) and in each case completely into the outer-side joint element ( 1 ) that does not have a plunger or pushbutton ( 19 ), and in the central joint element ( 2 ) are insertable, and - that all joint elements ( 1 . 2 . 3 ) are rotatable relative to each other and by releasing the push button ( 19 ) via the compression spring ( 17 . 18 ) the locking parts ( 13 . 14 ) are traceable to the locking positions. Joint according to claim 1, characterized in that - both the outer joint elements ( 1 . 3 ) as well as the central joint element ( 2 ) a storage wall with a central, hollow journal ( 22 . 23 . 24 ), and - that during assembly of the cup-shaped joint elements ( 1 . 2 . 3 ) the composite by a through the center holes of the bearing journal ( 22 . 23 . 24 ) screwed or riveted bolt are interconnected, wherein concentrically about the bearing journal ( 22 . 23 . 24 ) at least in the one outer joint element ( 1 . 3 ) Storage locations for the storage of storage tongues ( 26 ) on the pushbutton ( 19 ) and the bearing tongues ( 26 ) on the end face of the security part ( 14 ). Joint according to claim 1 or 8, characterized in that in the central bearing wall of the central joint element ( 2 ) concentric guide bores for receiving guide pins ( 27 ) of the spacer ( 20 . 21 ) are provided and that in telescope design, the guide pins ( 27 ) are hollow and in these compression springs ( 28 ) and bearing pins ( 29 ) of a support ring ( 30 ) are inserted after passing through the guide holes. Joint according to claim 1, characterized in that on the outer joint elements ( 1 . 3 ) on both sides pushbuttons ( 19 ) for moving the locking elements ( 13 . 14 ) are provided, which against the force of a compression spring ( 17 . 18 ) by pressing the pushbutton ( 19 ) or by moving a plunger into the internal toothing ( 11 ) of the central part are inserted. Joint according to claim 1, characterized in that the connecting parts ( 4 . 5 . 6 ) radial or tangential and / or axial bearing sleeves ( 7 . 8th . 9 ) for attachment to parts. Joint according to claim 1, characterized in that the central joint element ( 2 ) is about twice as wide as the lateral joint elements ( 1 . 3 ). Joint according to one of the preceding claims, characterized in that at least the joint elements ( 1 . 2 . 3 ) with the connecting parts ( 4 . 5 . 6 ; 7 . 8th . 9 ) and the internal gears ( 10 . 11 . 12 ) each consist of one-piece or two halves latching assembled plastic parts and that the locking elements ( 13 . 14 ) and the pushbuttons ( 19 ) as well as the spacers ( 20 . 21 ) Are plastic moldings or made of plastic.