Pull-out hose device, in particular sanitary pull-out hose device

Abstract

1. Extension hose device. 2.1. The invention relates to an extension hose device comprising a hose holder, an extension hose which is extended by an extension movement in an extension direction to an extension end position and retracted by a retraction movement opposite to the extension movement to an extension end position, and a rotary lock with a rotatable ratchet wheel (3) and a pawl (4) elastically pre-tensioned against the ratchet wheel and pivotable about a pawl axis (5). The ratchet wheel is coupled to the extension hose in such a way that it rotates with the extension movement of the extension hose in an extension direction (DA) and with the retraction movement of the extension hose in a retraction direction opposite to the extension direction (DE).In an extension-release position (AF), the pawl releases the ratchet wheel in its extension direction. 2.2. According to the invention, the pawl can be moved from the ratchet wheel by a rotation in its retraction direction from the extension-release position (AF) to a retraction-locking position, in which it blocks further rotation of the ratchet wheel in its retraction direction, and by a rotation in its extension direction from the retraction-locking position to a retraction-release position, in which it releases the ratchet wheel in its retraction direction. 2.3. Use, for example, as a sanitary pull-out hose device at showers, washbasins, and bathtubs.

Description

[0001] The invention relates to a pull-out hose device according to the preamble of claim 1, hereinafter also referred to as a generic pull-out hose device, which may in particular be a sanitary pull-out hose device.

[0002] Accordingly, the extension hose device comprises a hose holder, an extension hose which is extended by an extension movement in one direction to an extension end position and retracted by a retraction movement opposite to the extension movement to an extension end position, and a rotary lock with a rotatable ratchet wheel and a pawl elastically pre-tensioned against the ratchet wheel and pivotable about a pawl axis. The ratchet wheel is coupled to the extension hose, hereinafter also referred to simply as the hose, such that it rotates in the direction of extension with the extension movement of the hose and in the opposite direction of retraction with the retraction movement of the hose. In an extension release position, the pawl releases the ratchet wheel in its extension direction.The extension hose device thus includes the extension hose and an extension hose guide device, which refers to the other components of the extension hose device that hold the extension hose and guide it in its extension and retraction movement.

[0003] These types of pull-out hose devices are used, for example, in sanitary facilities for pull-out hand showers on bathtubs, washbasins, and in shower rooms, as well as for kitchen pull-out spray heads, i.e., pull-out hand showers on kitchen sinks. Furthermore, these and similar pull-out hose devices are also used outside of sanitary engineering, for example, for fuel hoses at gas stations. The user can extend the hose from a retracted position to an extended position and then return it to the retracted position, usually automatically using a suitable retraction mechanism that exerts a corresponding pulling or retracting force on the hose.The retraction force is typically provided by the retraction device as a spring force using a retraction spring and / or by a weight force using a guide roller inserted into a hose bend of the withdrawal hose.

[0004] Non-standard extension hose devices with such a retraction mechanism, but without a rotating lock, are disclosed, for example, in European Patent Applications EP 3 647 503 A1, US 2017 / 0356170 A1 and WO 2021 / 191609 A1, German Utility Model DE 20 2005 019 492 and German Patent EP 3 394 353U1 B1. Another such extension hose device is described in the applicant's earlier European Patent Application 24164172.9. With these non-standard extension hose devices, the user must hold the extension hose securely in the extended position to prevent retraction, i.e., exert a hose-holding force.

[0005] In the case of the standard pull-out hose device, the user is relieved of this hose-holding force by the rotary lock. The rotary lock allows the pull-out hose to be fixed in a desired extended position by preventing it from being retracted, for example, by a retraction force provided by a return mechanism, while still allowing the hose to be pulled out. To achieve this, the rotary lock performs its intended function, which consists of the pawl allowing the locking wheel to rotate in one direction (the extension direction) and thus extending the hose, while it prevents the wheel from rotating in the opposite direction (the retraction direction), thus blocking the hose from being retracted.

[0006] Utility model CN ​​203545354 U discloses a generic pull-out hose device for a sanitary hand shower, in which the locking wheel is formed by a rotating ring that is rotationally fixed to a hose reel onto which the pull-out hose is wound. The locking pawl is associated with a user-operated push button, by means of which the user can move the locking pawl from its pull-out release position, in which it releases the rotation of the locking wheel in its pull-out direction and simultaneously blocks the rotation of the locking wheel in its retraction direction, to a retraction release position, in which it is disengaged from the locking wheel and therefore releases the rotation of the locking wheel in its retraction direction.

[0007] Similarly, utility model CN ​​216548954 U discloses a generic extension hose device for an oxygen hose, in which the pawl can be moved by the user, via a pull knob, from its extension release position, which simultaneously functions as a retraction locking position and thus releases the rotation of the ratchet wheel in its extension direction and locks it in its retraction direction, to a retraction release position, in which it releases the rotation of the ratchet wheel in its retraction direction. In this case, the pawl is designed as a rack pivotally mounted at one end, which interacts with an outer toothed ring of the ratchet wheel under the action of a preload spring and can be pivoted at its other end into the retraction release position by the user via the pull knob and a pull rod.

[0008] US patent 6,915,816 B2 discloses a generic pull-out hose device for a sanitary hand shower, in which the locking wheel is provided with locking teeth over slightly more than half its circumference. In the untoothed circumferential area, the locking wheel is not engaged with the pivotally mounted pawl. This rotary lock can therefore secure the pull-out hose against retraction only in those positions where the pawl is opposite the toothed portion of the locking wheel.To unlock, the user pulls the extension tube out a little further until the pawl reaches the untoothed area of ​​the locking wheel, then the user allows the extension tube to retract, whereby the locking wheel, as soon as its toothed area comes into contact with the pawl in its retraction direction, pivots the pawl into a retraction release position, allowing the extension tube to be retracted further without being blocked by the rotary lock.

[0009] The invention is based on the technical problem of providing a generic pull-out hose device that offers further advantages over the aforementioned prior art, particularly with regard to ease of use and functionality.

[0010] The invention solves this problem by providing a pull-out hose device with the features of claim 1. Advantageous embodiments of the invention are specified in the dependent claims, the wording of which is hereby incorporated by reference into the description. This includes, in particular, all embodiments of the invention resulting from the combinations of features defined by the cross-references in the dependent claims.

[0011] In the extraction hose device according to the invention, the pawl of the ratchet wheel can be moved by a rotation in its retraction direction from its extraction release position, in which it releases the rotation of the ratchet wheel in its extraction direction, to a retraction locking position, in which it blocks further rotation of the ratchet wheel in its retraction direction. Furthermore, the pawl of the ratchet wheel can be moved by a rotation in its extraction direction from the retraction locking position to a retraction release position, in which it releases rotation of the ratchet wheel in its retraction direction.

[0012] These measures according to the invention result in a high level of user-friendliness and reliable functionality for the extension hose device. The rotary lock is designed such that the retraction locking position of the pawl differs from its extension release position, and the pawl is moved from the extension release position to the retraction locking position by the rotation of the locking wheel in its retraction direction. For this movement to occur, it is sufficient if the user, when extending the hose to a desired position, allows only a slight retraction movement of the hose, which causes the locking wheel to rotate a small distance in the retraction direction. This mechanism for moving the pawl into its retraction locking position is fundamentally functional in every extension position of the hose.This does not impose any restrictions regarding the possible locking positions for the extension hose.

[0013] Again, by rotating the locking wheel, in this case in its extension direction, the pawl can be moved from its retraction locking position to its retraction release position, in which it releases the locking wheel in its retraction direction. Consequently, the user can then indirectly actuate the pawl simply by operating the extension hose, specifically by extending the hose a little further from its previously set locking position.

[0014] The extension release position of the locking pawl is therefore not simultaneously the retraction locking position. Rather, the retraction locking position is defined as a separate position of the locking pawl, distinct from the extension release position. This positional decoupling of the extension release and retraction locking positions allows the retraction locking position to be designed independently of the extension release position, thereby achieving functional advantages and improved ease of use. For example, the retraction locking position can be designed to optimally fulfill the required locking function of the pawl, taking into account the blocking forces involved, without having to consider the positional conditions that apply to the pawl when it is in its extension release position.Furthermore, this decoupling of the extension release position and the retraction locking position allows for the additional measure of moving the locking pawl from the retraction locking position to the retraction release position by rotating the locking wheel in its extension direction. This means that the user can then, by actuating the extension tube—in this case, by pulling it out slightly further—move the locking pawl from its retraction locking position to its retraction release position, thereby unlocking the rotary lock.

[0015] Thus, the extension hose device according to the invention allows the extension hose to be locked or fixed in virtually any extension position as desired and required by simply releasing the extension hose or slightly moving it back, and allows the extension hose to be easily released from its locking position by slightly pulling out the hose, after which the hose can be retracted further or completely, either automatically or with user assistance.

[0016] In a further development of the invention, the ratchet wheel has a plurality of circumferential locking teeth that interact with the pawl, wherein the pawl can be moved from the retraction locking position to the retraction release position by one of the locking teeth through the rotation of the ratchet wheel in its extension direction. Advantageously, the locking teeth thus function as an actuating element for switching the pawl from its extension release position to its retraction locking position and / or from its retraction locking position to its retraction release position, so that no other actuating element is required for this purpose. Specifically, for a given extension position of the hose, a locking tooth adjacent to the pawl in the retraction or extension direction acts as an actuating element for moving the pawl accordingly. The locking tooth used to switch the pawl from its extension release position to its retraction locking position or from its retraction locking position to its retraction release position is located on the ratchet wheel.The rotational angle of the ratchet wheel required to move from its retraction locking position to its retraction release position does not depend on the angular spacing of adjacent locking teeth of the ratchet wheel, but only on the corresponding rotational angular spacing of these pawl positions. In alternative embodiments, the movement of the pawl from its extension release position to its retraction locking position and / or from its retraction locking position to its retraction release position is effected by a separate actuating element provided for this purpose, which is preferably rotaryally coupled to the ratchet wheel.

[0017] In a further development of the invention, the retraction-locking position of the pawl is a clamping position of the pawl between the ratchet wheel and a locking stop of the rotary lock. Advantageously, in this case, the retraction-locking position of the pawl is achieved by simply clamping the pawl between the ratchet wheel and the locking stop. Alternatively, the retraction-locking position is achieved in another way, e.g., by a self-disengaging detent of the pawl with a corresponding counter-detent element of the rotary lock.

[0018] In a further development of the invention, the retracted release position of the pawl is a self-locking position of the pawl on a pawl retaining element of the rotary lock. Thus, the pawl retaining element acts as a retaining element for the pawl in its retracted release position. The ratchet wheel, including any locking teeth formed on it, is relieved of this function, so that the pawl does not need to interact with the ratchet wheel or its locking teeth in this position. This pawl retaining element can be, for example, the aforementioned locking stop or another retaining element provided on the rotary lock. The self-locking can be achieved, for example, by a positive-locking or friction-locking connection. In alternative embodiments, the retracted release position of the pawl can be implemented in a different way, e.g.,as a non-self-holding position in which the locking pawl is held by the user while he retracts the hose.

[0019] In a further development of the invention, the pawl is displaceable along a guide track with its pawl axis. This measure has the advantage that the pawl can be moved or shifted along the guide track as needed for switching between its three different positions, i.e., the extension-release position, the retraction-lock position, and the retraction-release position. Depending on the requirements and system design, this can be accompanied, for example, by an additional rotational or pivoting movement of the pawl about its pawl axis. In alternative embodiments, the pawl axis is stationary, and the pawl is switched between its three positions in a different way. For this purpose, for example, elastic deformation or deformation by means of a joint can be provided, preferably in combination with pivoting about its pawl axis.

[0020] In one embodiment of the invention, the axle guide track has a path direction component radial to the ratchet wheel. This represents an optimal path for the axle guide track in many applications. In this case, the pawl can, with its pawl axis, perform a radial outward displacement relative to the ratchet wheel during its switching movements, for example, to allow the pawl to pivot across a diameter line between the pawl axis and the ratchet wheel axis. In alternative embodiments, the axle guide track runs without a radial path direction component, for example, purely in the circumferential direction of the ratchet wheel. The other components of the rotary ratchet are then designed accordingly to enable the required pawl switching movements.

[0021] In one embodiment of the invention, the movement of the pawl from its extension-release position to its retraction-release position and / or from its retraction-locking position to its retraction-release position involves a movement of its pawl axis along the axis guide track. In this case, the axis guide track is specifically used to allow a corresponding evasive movement of the pawl with its pawl axis in order to switch the pawl from its retraction-locking position to its retraction-release position. In alternative embodiments, this switching movement does not involve a movement of the pawl axis along the axis guide track. For example, a simple pivoting movement of the pawl into a disengageable detent position or the like may be provided for this purpose.

[0022] In yet another embodiment of the invention, the pawl, in its extension-release position, rests against an anti-rotation stop of the rotary lock and, as the locking wheel rotates in its extension direction, shifts along the axis of rotation with its pawl axis. In this embodiment, when the pawl is in its extension-release position in contact with the anti-rotation stop, it can evade the rotating locking wheel, and in particular the locking teeth optionally provided on its circumference, by shifting or moving along the axis of rotation with its pawl axis. The anti-rotation stop secures the pawl in this position against any additional pivoting movement around its pawl axis. This ensures that the pawl maintains an angular position defined by the anti-rotation stop during the hose extension movement.In alternative designs, the extension release position of the pawl is realized differently, e.g., when using a ratchet wheel with circumferential locking teeth, in a conventional manner in such a way that the pawl rests spring-elastically against the locking teeth in such a way that they can rotate past the pawl in the extension direction of the ratchet wheel and cause the pawl to make an evasive pivoting movement.

[0023] In a further development of the invention, the movement of the pawl from its extension-release position to its retraction-lock position includes a pivoting about its pawl axis. Thus, the retraction-lock position differs from the extension-release position at least in the angular position of the pawl. In embodiments with a guide track for the pawl axis, this switching movement of the pawl preferably also includes, for example, an evasive displacement movement of the pawl axis along the guide track. In alternative embodiments, this switching movement of the pawl is implemented differently, for example, as a purely translational displacement of the pawl, particularly with its pawl axis along the guide track.

[0024] In a further development of the invention, the rotary lock is movably arranged along a stationary part of the hose holder, coupled to the extension and retraction movement of the extension hose, and the stationary part of the hose holder has a stationary retraction-end-position-side pawl switching element that moves the locking pawl from its retraction-release position to its extension-release position in a retraction-end-position-side switching position of the rotary lock moved along the hose holder.

[0025] This represents an advantageous implementation for many applications regarding the connection of the rotary lock to the hose holder. For this purpose, the rotary lock is arranged on the relevant stationary part of the hose holder such that it is movable along its length, with this movement of the rotary lock being coupled to the extension and retraction movement of the hose. This stationary part of the hose holder, which does not move with the hose and the rotary lock, includes the also stationary retraction-end-position pawl switching element, which means that this pawl switching element is associated with the retraction end position of the hose. This pawl switching element moves the locking pawl to a corresponding retraction-end-position switching position of the rotary lock, i.e., when the rotary lock, which moves along the hose holder during retraction of the hose, is in a position associated with the retraction end position of the hose.h. near this position, it is moved from its retraction release position to its extension release position, i.e., switched. This ensures that the locking pawl is in its extension release position, which forms a starting position of the rotary lock, when the extension tube reaches its fully retracted position, i.e., its end retraction position. In alternative designs, it is ensured in a different way that the rotary lock with its locking pawl is in this starting position when the extension tube is fully retracted.

[0026] In a further development of the invention, the rotary lock is movably arranged along a stationary part of the hose holder coupled to the extension and retraction movement of the extension hose, and the stationary part of the hose holder has a stationary pawl switching element on the extension end position side, which moves the locking pawl from its extension release position to its retraction release position in an extension end position switching position of the rotary lock moved along the hose holder.

[0027] This also represents a particularly advantageous method for connecting the rotary lock to the hose holder and the extension hose. Here, the stationary part of the hose holder, on which the rotary lock is movably mounted and which moves along it in conjunction with the extension and retraction movement of the extension hose, has a stationary pawl switching element on the extension end position side. This pawl switching element is associated with the extension end position of the hose, i.e., the hose's fully extended position. It is located at a point the rotary lock reaches when the hose moves close to its extension end position. This pawl switching element moves the locking pawl in the corresponding extension-position-associated switching position of the rotary lock from its extension release position to its retraction release position.This ensures that the rotary lock is in its unlocked state, in which its pawl allows the hose to retract when the hose is in its fully extended position. While the user can, in principle, move the pawl from a previous retraction lock position to the retraction release position by briefly extending the hose, further extension of the hose to its fully extended position is then no longer possible. Alternative designs ensure that the pawl assumes its retraction release position when the hose is fully extended by a different means.

[0028] In one embodiment of the invention, the hose holder has a stationary pawl track along which the locking pawl is translationally movable. The pawl track has a shoulder on the retraction end position side, which forms the pawl switching element on the retraction end position side, and / or a shoulder on the extension end position side, which forms the pawl switching element on the extension end position side. This measure represents an advantageously simple implementation for the pawl switching element on the retraction end position side or the pawl switching element on the extension end position side. For this purpose, the locking pawl is arranged to be translationally movable along the stationary pawl track, and the pawl track is suitably provided with the shoulder on the retraction end position side or the shoulder on the extension end position side in order to provide the respective pawl switching element in a simple manner.In alternative designs, the respective latch switching element can be implemented in a different way, e.g. in the form of a switching cam stationary at the relevant position, which switches the locking latch in the required way when it comes against it or moves past it.

[0029] In a further development of the invention, the hose holder comprises a guide roller arrangement with a stationary guide body, a roller retaining element which is guided translationally on the guide body with the extension and retraction movement of the extension hose, and at least one guide roller rotatably mounted on the roller retaining element, on the circumference of which the extension hose is guided with a hose bend attached to it. The ratchet wheel is rotaryally coupled to the guide roller and / or to a winding roller which is rotatably mounted on the roller retaining element and rotates with the translational movement of the roller retaining element. The pawl is arranged on the roller retaining element.

[0030] This represents an advantageous implementation of the hose support for the extension hose in many applications. For this purpose, a guide roller arrangement of a type known per se, such as that described in the aforementioned prior art, is used. The stationary guide body can be designed, for example, as a guide plate, guide rail, or hose box that accommodates the extension hose. The roller holder is guided translationally on the guide body, e.g., via an associated cam guide, and serves as a holder for the one or more guide rollers rotatably arranged on it, each of which is inserted into a bend of the extension hose. Optionally, the roller holder also serves to rotatably support a winding roller, which can, for example, be a component of a hose retraction device, as is known per se.When the hose is pulled out, the roller holder moves along the stationary guide body, and the respective guide roller typically rotates, unless it is designed as a sliding roller. Similarly, the optional winding roller rotates due to the translational movement of the roller holder.

[0031] The rotation of the guide roller or winding roller is transmitted to a corresponding rotation of the locking wheel to which it is rotatably coupled. The locking pawl is located on the roller holder, meaning that the entire rotary lock moves along the stationary guide body when the hose is extended or retracted. Due to the rotary coupling of the locking wheel to the guide roller or winding roller, the rotary lock fulfills its required functions, particularly with regard to the switching movements of the locking pawl between its extension release position, its retraction locking position, and its retraction release position, solely through corresponding extension or retraction movements of the hose by the user. In alternative designs, the rotary lock can be coupled to the hose holder and the hose in a different manner.

[0032] In one embodiment of the invention, the pawl, with its pawl axis, is translationally movable along the axle guide track and held elastically against the ratchet wheel by means of a spring on the roller retaining part. This represents a structurally and functionally advantageous coupling and movement guidance for the pawl for many applications.

[0033] In one embodiment of the invention, the hose holder has a return mechanism coupled to the guide roller assembly, which comprises the winding roller, a retraction element wound thereon, and a retraction spring unit. In this case, it is preferred to couple the locking wheel to the winding roller in a rotationally fixed manner.

[0034] An advantageous embodiment of the invention is shown in the drawings. This and further embodiments of the invention are explained in more detail below. The drawings show: Fig. 1 a side view of a pull-out hose device, Fig. 2 an exploded view of a guide roller assembly with associated return device and a rotary lock of the pull-out hose device of Fig. 1 Fig. 3: an exploded view of the guide roller assembly from the side and rear; Fig. 4: a perspective view of the guide roller assembly; Fig. 5: a rear view of the guide roller assembly with the rotary lock and a pawl in the extension-release position; Fig. 6: a sectional view along a line VI-VI. Fig. 5 , Fig. 7 a sectional view along a line VII-VII in Fig. 6 , Fig. 8 the sectional view of Fig. 7 with the locking pawl in the retraction-lock position, Fig. 9 the sectional view of Fig. 7 with the pawl in the retraction-release position, Fig. 10 a perspective view of the pawl, Fig. 11 a detail view of area XI in Fig. 1 with the locking pawl in the retraction release position and Fig. 12 the detail view of Fig. 11 with the locking latch in the pull-out release position.

[0035] As illustrated in the figures using an exemplary embodiment, the pull-out hose device according to the invention comprises a hose holder 1, a pull-out hose 2 and a rotary lock with a rotatable ratchet wheel 3 and a pawl 4 which is elastically preloaded against the ratchet wheel 3 and pivotable about a pawl axis 5. Preferably, the elastic preload is implemented as a spring-elastic preload.

[0036] The extension hose 2 is extendable from the hose holder 1 by an extension movement to an extension end position and retractable to an extension end position by a retraction movement opposite to the extension movement, as is customary for such extension hose devices. The locking wheel 3 is coupled to the extension hose 2 such that it rotates in an extension direction DA with the extension movement of the extension hose 2 and in a retraction direction DE opposite to the extension direction DA with the retraction movement of the extension hose 2. The two directions of rotation DA and DE are specified in the Fig. 7 bis 9 shown.

[0037] The locking latch 4 is in an extract release position AF, which is in the Fig. 5, 7 and 12It can be seen that the ratchet wheel 3 is free to rotate in its extension direction DA. From this extension release position AF, the pawl 4 can be moved into a retraction locking position ES, in which the pawl 4 blocks any further rotation of the ratchet wheel 3 in its retraction direction DE. The retraction locking position ES is in Fig. 8 to be recognized. The relocation of the pawl 4 from its extension release position AF to its retraction locking position ES is effected by the ratchet wheel 3, specifically by a rotation of the ratchet wheel 3 in its retraction direction DE.

[0038] Furthermore, the pawl 4 can be moved from its retraction locking position ES to a retraction release position EF, in which it releases the ratchet wheel 3 in its retraction direction DE. The retraction release position EF is in the Fig. 9 and 11to be recognized. This displacement of the pawl 4 from its retraction-locking position ES to its retraction-release position EF is also caused by the ratchet wheel 3, specifically by a rotation of the ratchet wheel 3 in its extension direction DA.

[0039] In advantageous embodiments, the pawl 4, as in the example shown, is displaceable with its pawl axis 5 along a guide track 7. The guide track 7 is, for example, in the Fig. 3 and 7 bis 9 to recognize.

[0040] In advantageous implementations, the axis guide track 7, as in the example shown, runs with a path direction component 7R radial to the ratchet wheel 3, as in Fig. 8 Explicitly indicated as a dashed line. Path 7 can run purely radially or with an additional circumferential component.

[0041] In corresponding embodiments, the relocation of the pawl 4 from its extension release position AF to its retraction release position EF includes a relocation of its pawl axis 5 along the axis guide track 7, as is the case in the example shown.

[0042] In advantageous implementations, the relocation of the pawl 4 from its retraction-locking position ES to its retraction-release position EF includes a relocation of its pawl axis 5 along the axis guide track 7, as is also the case in the example shown.

[0043] In advantageous embodiments, the ratchet wheel 3, as in the example shown, has a plurality of circumferential locking teeth 3z that interact with the pawl 4. In particular, in this case, the displacement of the pawl 4 from its retraction-locking position ES to its retraction-release position EF by the rotation of the ratchet wheel 3 in its extension direction DA is effected by the locking teeth 3z, specifically by the locking tooth 3z that is adjacent to the pawl 4 in the extension direction DA of the ratchet wheel 3, i.e., the tooth closest to it. Fig. 8 und 9 This locking tooth is marked with the reference symbol 3z1. As is typical for such locking teeth, the locking teeth 3z have a sawtooth shape with a steep or steeper and a flat or flatter tooth flank.

[0044] In advantageous embodiments, the retraction-locking position ES of the pawl 4, as in the example shown, is realized by a clamping position of the pawl 4 between the ratchet wheel 3 and a locking stop 6 of the rotary lock. Fig. 8 This clamping position of the pawl 4 between the locking stop 6 and the ratchet wheel 3 is specifically given by clamping the pawl 4 between the locking stop 6 and a locking tooth 3z2 of the ratchet wheel 3 which in this state rests against or presses against the pawl 4.

[0045] In advantageous embodiments, the relocation of the pawl 4 from its extension-release position AF to its retraction-locking position ES includes a pivoting about its pawl axis 5, as is the case in the example shown. This is particularly evident from a comparison of the Fig. 7 and 8As can be seen, in the design of the ratchet wheel 3 with the ratchet teeth 3z, this pawl displacement is effected by the ratchet tooth 3z which, before the ratchet 4 is displaced from its extension-release position AF to its retraction-locking position ES, is closest to the ratchet 4 in the retraction direction DE of rotation of the ratchet wheel 3. In the case of the ratchet 4 being clamped between the locking stop 6 and the ratchet tooth 3z2, this is the ratchet tooth 3z2, as shown from Fig. 7 evident.

[0046] Specifically, the movement of the pawl 4 from its extension release position AF to its retraction locking position ES is effected in this case by the pawl tooth 3z2, with its steep tooth flank, coming into contact with a face end of the pawl 4, with which the pawl 4 bears elastically against the ratchet wheel 3, and with its rotation in the retraction direction DE, in this case counterclockwise, engaging the face end of the pawl 4. This causes the pawl 4 to rotate accordingly about its pawl axis 5, clockwise in the example shown, until the retraction locking position ES is reached. Fig. 8 is achieved, as shown by the Fig. 7 and 8 This can be seen comparatively. Additionally, if necessary, the pawl 4 can perform a radial evasive movement by shifting its pawl axis 5 in the axis guide track 7.

[0047] In advantageous embodiments, the retraction-release position EF of the pawl 4, as in the example shown, is realized as a self-holding position of the pawl 4 on a pawl retaining element 15 of the rotary lock. As in Fig. 9 As illustrated, in the example shown, the latch retaining element 15 and the pawl 4 are shaped such that the latch retaining element 15 holds the elastically pre-tensioned pawl 4 in a form-fit and / or force-fit manner, allowing the ratchet wheel 3 with its locking teeth 3z to rotate freely in its retraction direction DE without hindrance from the pawl 4. For the sake of completeness, it should be mentioned that in this retraction release position EF, the pawl 4 also allows the ratchet wheel 3 to rotate in its extension direction DA; that is, in this state of the rotary lock, the user can freely retract or extend the extension tube 2 to any desired length. In the example shown, the latch retaining element 15 and the locking stop 6 are formed by the same component; that is, the locking stop 6 simultaneously functions as the latch retaining element 15.

[0048] In advantageous embodiments, the rotary lock, as in the example shown, includes a rotation-prevention stop 8 against which the pawl 4 rests in its extension-release position AF, wherein, when the ratchet wheel 3 rotates in its extension direction DA, the pawl 4 shifts with its pawl axis 5 along the axis guide track 7. This is particularly advantageous because Fig. 7 visible. If the ratchet wheel 3 is in Fig. 7 As the locking mechanism rotates in its extension direction DA, in this case clockwise, the pawl 4 slides with its facing pawl end along the flat tooth flanks of the locking teeth 3z and is pressed radially outwards by these tooth flanks, while the anti-rotation stop 8 prevents the pawl 4 from pivoting. The axis guide track 7 allows this radial movement of the pawl 4.

[0049] In advantageous embodiments, the rotary lock, as in the example shown, is movably arranged along a stationary part of the hose holder 1, its movement being coupled to the extension and retraction movement of the extension hose 2. The stationary part of the hose holder 1 has a stationary retraction-end-position pawl switching element 9, which moves the locking pawl 4 from its retraction release position EF to its extension release position AF in a corresponding retraction-end-position switching position of the rotary lock moving along the hose holder 1.

[0050] This is shown in the detailed views of the excerpts. Fig. 11 und 12 illustrated. Fig. 11 This shows the situation when the extension hose 2 approaches its retraction end position. The locking pawl 4 is in its retraction release position EF, which allows the hose 2 to retract. Fig. 12 This shows the situation after hose 2 has been retracted slightly closer to or has reached its retraction end position. The locking pawl 4 has been moved from its retraction release position EF by the pawl switching element 9 on the retraction end position side. Fig. 11 in their Fig. 12 The illustrated extension release position AF is shifted, in the example shown specifically by a pivoting movement of the pawl 4, optionally accompanied by an evasive movement of its pawl axis 5 along the axis guide track 7. For this functionality, the pawl 4 in the example shown, as can be seen in particular from Fig. 10 In addition to a pawl part 4a, with which it bears against the ratchet wheel 3, a switching cam 4b is evident, with which the pawl switching element 9 interacts. The switching cam 4b is connected to the pawl part via a connecting web 4c, preferably as a single piece, wherein the pawl 4 with its connecting web 4c is guided in the axle guide track 7.

[0051] This mechanism ensures that the locking pawl 4 is in its extension release position AF, which in this case forms the starting position of the rotary lock, when the hose 2 is fully retracted, i.e., in its retraction end position, from which it can be extended by the user. In particular, this ensures that the locking pawl 4 can be moved from its extension release position AF to its retraction locking position ES the next time the hose 2 is extended, if the user wishes to lock or secure the hose 2 in a desired extension position. This eliminates the need for a mechanism to directly move the locking pawl 4 from its retraction release position EF to its extension release position AF.

[0052] In advantageous embodiments, the rotary lock, as in the example shown, is movably arranged along a stationary part of the hose holder 1, its movement being coupled to the extension and retraction movement of the extension hose 2. The stationary part of the hose holder 1 has a stationary pawl switching element 10 at the extension end position, which moves the pawl 4 from its extension release position AF to its retraction release position EF in a corresponding switching position at the extension end position of the rotary lock moving along the hose holder 1. This mechanism, and specifically the extension-end-side latch switching element 10, functions analogously to the mechanism mentioned above with the retraction-end-side latch switching element 9. In the example shown, the locking pawl 4 again interacts with its switching cam 4b with the extension-end-side latch switching element 10.In this case, this mechanism ensures that the locking pawl 4 is in its retraction release position EF when the hose 2 has been extended to its final extension position, so that it can then be retracted unhindered by the rotary lock.

[0053] In corresponding embodiments, the hose holder 1 has a stationary latch track 14 along which the locking pawl 4 is translationally movable, wherein the latch track 14 has a retraction-end-position shoulder 14a, which forms the retraction-end-position latch switching element 9, and / or an extension-end-position shoulder 14b, which forms the extension-end-position latch switching element 10. In the example shown, the retraction-end-position shoulder 14a and the extension-end-position shoulder 14b are provided as shown in the figure. Fig. 1 The respective track shoulder 14a, 14b interacts with the switching cam 4b of the locking pawl 4 by bringing it towards the system and pivoting it.

[0054] In advantageous embodiments, the hose holder 1, as in the example shown, comprises a guide roller arrangement with a stationary guide body 11, a roller retaining part 12 which is guided translationally on the guide body 11 with the extension and retraction movement of the extension hose 2, and at least one guide roller 13 rotatably held on the roller retaining part 12, on the circumference of which the extension hose 2 with a hose bend 2B abutting it is guided. The guide roller arrangement is of a known design per se, as described, for example, in the prior art mentioned above. In the example shown, two guide rollers 131, 132 are arranged parallel to one another, which are inserted into two bends of the extension hose 2 in the manner of a pulley system.

[0055] In the example shown, the guide body 11 is formed by two parallel, spaced-apart guide plates, which form a kind of laterally open hose box and accommodate the extension hose 2 and the guide roller assembly between them. The roller retaining element 12 is guided translationally in a straight cam track 19 formed in the guide body 11 or in one of the two guide plates, or in two spaced-apart straight cam tracks 19 formed in the two guide plates, as shown in the Fig. 1 , 11 und 12 to be recognized. In addition, the latch track 14 is formed on the guide body 11 or on one of the guide plates, e.g. as in Fig. 1 shown parallel to and at a distance from the scenery track 19 for the roller holding part 12.

[0056] In advantageous embodiments, the pawl 4, as in the example shown, is translationally movable with its pawl axis 5 along the axis guide track 7 and is held elastically pre-tensioned against the ratchet wheel 3 on the roller retaining part 12 by means of a spring 20, in the example shown specifically a coil spring.

[0057] In advantageous embodiments, the hose holder 1, as in the example shown, further comprises a retraction device coupled to the guide roller assembly. This retraction device includes a winding roller 16, a retraction element 17 wound thereon (e.g., in the form of a retraction cord, thread, tape, or the like), and a retraction spring assembly 18. The retraction device is also of a known design, as described in the prior art mentioned above. The winding roller 16 is rotatably mounted on the roller holder 12 and rotates when the roller holder 12 moves translationally. In the example shown, the retraction spring assembly 18 comprises a coil spring inserted into the winding roller 16, which is fixed at one end to the roller holder 12 and at the other end to the winding roller 16.The retraction element 17 is wound around an outer circumference of the winding roller 16 and unwinds from it when the hose 2 is pulled out and onto it when the hose 2 is retracted.

[0058] In advantageous embodiments, the ratchet wheel 3, as in the example shown, is rotationally coupled to the winding roller 16. The ratchet wheel 3 can be formed integrally with the winding roller 16, as in the example shown, or manufactured as a separate component and rotationally coupled to the winding roller 16. Alternatively or additionally, the ratchet wheel 3 can be rotationally coupled to the guide roller 13 or to one of the several guide rollers 131, 132. Similarly, depending on requirements and application, the ratchet wheel 3 can be formed integrally with the guide roller 13 or with one of the several guide rollers 131, 132, or manufactured as a separate component and rotationally fixed to it.

[0059] As the illustrated embodiment and the further embodiments described clearly demonstrate, the invention advantageously provides a pull-out hose device that offers a high degree of user-friendliness and reliable functionality. It allows the user intuitive operation, enabling them, in particular, to easily lock the pull-out hose in a desired position by simply relieving the pulling force on the hose, thus allowing it to retract slightly and engage the locking mechanism. To unlock the locking mechanism, the user simply needs to pull the hose briefly again.The slight extension movement of the hose causes the locking pawl of the rotary lock to enter its retraction release position, after which the user can freely extend the hose further or retract it to its retraction end position.

[0060] The pull-out hose device is particularly suitable as a sanitary pull-out hose device for shower areas, washbasins, sinks, bathtubs and kitchen sinks, etc., but it can also be used in the same way for non-sanitary applications where there is a need for a corresponding pull-out hose device.

Claims

1. Pull-out hose device, in particular a sanitary pull-out hose device, comprising: - a hose holder (1), - a pull-out hose (2) which is held on the hose holder (1) extendable by a pull-out movement to an extension end position and retractable by a retraction movement opposite to the pull-out movement to an extension end position, and - a rotary lock with a rotatable locking wheel (3) and a locking pawl (4) elastically pre-tensioned against the locking wheel (3) and pivotable about a pawl axis (5), - wherein the locking wheel (3) is coupled to the pull-out hose (2) in such a way that it rotates with the pull-out movement of the pull-out hose (2) in a pull-out direction of rotation (DA) and with the retraction movement of the pull-out hose (2) in a retraction direction of rotation (DE) opposite to the pull-out direction of rotation (DA),and - wherein the pawl (4) in an extension release position (AF) releases a rotation of the ratchet wheel (3) in its extension direction of rotation (DA), , characterized by the fact that - the pawl (4) can be moved from the ratchet wheel (3) by a rotation in its retraction direction (DE) from the extension release position (AF) to a retraction locking position (ES) in which it blocks a further rotation of the ratchet wheel (3) in its retraction direction (DE), and - the pawl (4) can be moved from the ratchet wheel (3) by a rotation in its extension direction (DA) from the retraction locking position (ES) to a retraction release position (EF) in which it releases a rotation of the ratchet wheel (3) in its retraction direction (DE).

2. Extraction hose device according to claim 1, further characterized by the fact thatthe ratchet wheel (3) has a plurality of circumferential ratchet teeth (3z) which interact with the pawl (4), wherein the pawl (4) can be moved from the retraction locking position (ES) to the retraction release position (EF) by one of the ratchet teeth (3z) through the rotation of the ratchet wheel (3) in its extension direction (DA).

3. Extraction hose device according to claim 1 or 2, further characterized by the fact that The insertion locking position (ES) of the pawl (4) is a clamping position of the pawl (4) between the ratchet wheel (3) and a locking stop (6) of the rotary lock.

4. Extraction hose device according to one of claims 1 to 3, further characterized by the fact that The retraction release position (EF) of the pawl (4) is a self-holding position of the pawl (4) on a pawl retaining element (15) of the rotary lock.

5. Extension hose device according to one of claims 1 to 4, further characterized by the fact thatthe pawl (4) with its pawl axis (5) can be displaced along an axis guide track (7).

6. Extraction hose device according to claim 5, further characterized by the fact that the axle guide track (7) runs with a path direction component (7R) radial to the ratchet wheel (3).

7. Extraction hose device according to claim 5 or 6, further characterized by the fact that the relocation of the pawl (4) from its extension release position (AF) to its retraction release position (EF) and / or from its retraction locking position (ES) to its retraction release position (EF) includes a relocation of its pawl axis (5) along the axis guide track (7).

8. Extraction hose device according to one of claims 5 to 7, further characterized by the fact thatthe pawl (4) in its extension release position (AF) rests against a rotation stop (8) of the rotary lock and, when the ratchet wheel (3) is rotated in its extension direction (DA), shifts with its pawl axis (5) along the axis guide track (7).

9. Extraction hose device according to one of claims 1 to 8, further characterized by the fact that The relocation of the pawl (4) from its extension release position (AF) to its retraction locking position (ES) involves a pivot about its pawl axis (5).

10. Extension hose device according to one of claims 1 to 9, further characterized by the fact thatthe rotary lock is movably arranged along a stationary part of the hose holder (1) coupled with the extension and retraction movement of the extension hose (2) and the stationary part of the hose holder (1) has a stationary retraction end-position-side pawl switching element (9) which moves the locking pawl (4) in a retraction end-position-side switching position of the rotary lock moved along the hose holder (1) from its retraction release position (EF) to its extension release position (AF).

11. Extraction hose device according to one of claims 1 to 10, further characterized by the fact thatthe rotary lock is movably arranged along a stationary part of the hose holder (1) coupled with the extension and retraction movement of the extension hose (2) and the stationary part of the hose holder (1) has a stationary extension-end-position-side pawl switching element (10) which moves the locking pawl (4) in an extension-end-position-side switching position of the rotary lock moved along the hose holder (1) from its extension release position (AF) to its retraction release position (EF).

12. Extraction hose device according to claim 10 or 11, further characterized by the fact thatthe hose holder (1) has a stationary latch track (14) along which the locking pawl (4) is translationally movable, wherein the latch track (14) has an inward end position track shoulder (14a) which forms the inward end position latch switching element (9), and / or an outward end position track shoulder (14b) which forms the outward end position latch switching element (10).

13. Extraction hose device according to one of claims 1 to 12, further characterized by the fact thatThe hose holder (1) has a guide roller arrangement with a stationary guide body (11), a roller holding part (12) which is guided translationally on the guide body (11) with the extension and retraction movement of the extension hose (2), and at least one guide roller (13) which is rotatably held on the roller holding part (12), on the circumference of which the extension hose (2) is guided with a hose bend (2B) attached thereto, wherein the ratchet wheel (3) is rotatably coupled to the guide roller (13) and / or a winding roller (16) which is rotatably held on the roller holding part (12) and rotates with the translational movement of the roller holding part (12), and wherein the pawl (4) is arranged on the roller holding part (12).

14. Extraction hose device according to claim 13, further characterized by the fact thatthe pawl (4) with its pawl axis (5) is translationally movable along the axis guide track (7) and is held elastically pre-tensioned against the ratchet wheel (3) on the roller holding part (12) by means of a spring (20).

15. Extraction hose device according to claim 13 or 14, further characterized by the fact that the hose holder (1) has a retraction device coupled to the guide roller arrangement, which includes the winding roller (16), a retraction element (17) wound on it and a retraction spring unit (18).

Images