Spray gun for a high-pressure cleaning device

Abstract

The invention relates to a spray gun (10) for a high-pressure cleaning device, comprising a liquid inlet (34), a liquid outlet (54), and a housing (12) in which a valve (28) and an outlet tube (46) fluidically connected to the valve (28) are provided, the liquid outlet (54) being situated at the outlet tube (46) end facing away from the valve (28). The aim of the invention is to develop the spray gun (10) in such a way that the process of aligning a liquid jet with an object to be cleaned is simpler and less tiring. This is achieved in that the housing (12) has a first housing device (14) and a second housing device (16) which can be rotated relative to the first housing device (14) about the longitudinal axis (48) of the outlet tube (46) and can be locked in at least two rotational positions by means of a locking device (60). The valve (28) is mounted in the first housing device (14) for conjoint rotation, and the outlet tube (46) can be rotated relative to the valve (28) about the longitudinal axis (48) and is connected to the second housing device (16) for conjoint rotation, the second housing device (16) surrounding at least a part of the outlet tube (46) in the circumferential direction.

Description

[0001] SPRAY GUN FOR A HIGH-PRESSURE CLEANER

[0002] The invention relates to a spray gun for a high-pressure cleaning device comprising a liquid inlet for pressurized liquid, a liquid outlet for dispensing the liquid, and a housing in which a valve and an outlet pipe in flow communication with the valve are arranged, wherein the valve for controlling the liquid dispensing is positioned in a flow path between the liquid inlet and the liquid outlet and can be opened and closed by means of a control element, and wherein the liquid outlet is arranged at an end of the outlet pipe facing away from the valve.

[0003] Spray guns of this type allow for the controlled dispensing of liquid pressurized by a high-pressure cleaner. A pressure hose, for example, can be connected to a liquid inlet, through which pressurized liquid from the high-pressure cleaner can be supplied to the spray gun. The liquid inlet is connected to a liquid outlet via a flow path. A valve is located in this flow path. To control the liquid dispensing, the user can actuate the valve using a control element, such as a lever, opening and closing the valve and thus selectively opening and closing the flow between the liquid inlet and outlet.The liquid is dispensed via an outlet pipe that is in flow communication with the valve and at the end of which, opposite the valve, the liquid outlet is located. A dispensing unit, such as a spray lance, a spray nozzle, or a washing brush, can be connected to the liquid outlet. Such spray guns are known, for example, from WO 2018 / 028769 Al. With the aid of the dispensing unit connected to the liquid outlet of the spray gun, the pressurized liquid can be dispensed, for example, in the form of a liquid jet that has a specific jet geometry and / or jet orientation relative to a longitudinal axis of the outlet pipe. If, for example, a spray nozzle in the form of a flat jet nozzle is used as the dispensing unit, it forms a liquid jet that expands fan-like in a jet plane.To achieve the best possible cleaning results, it is helpful if the spray plane can be adjusted to the orientation of the object's surface area currently being sprayed with liquid. This often requires the user to align the spray gun differently relative to the longitudinal axis of the nozzle. This makes handling the spray gun more difficult and can lead to user fatigue during prolonged use.

[0004] Handling the spray gun can also become more difficult if a washing brush is connected to the liquid outlet of the spray gun as a discharge unit, and the orientation of the washing brush needs to be adjusted to the orientation of the surface area of ​​the object currently being cleaned by the brush. In this case, too, the user often needs to align the spray gun differently relative to the longitudinal axis of the outlet tube.

[0005] The object of the present invention is therefore to further develop a spray gun of the type mentioned above in such a way that it enables a simpler and less tiring alignment of the liquid jet onto an object to be cleaned.

[0006] This problem is solved in a spray gun of the type mentioned at the outset according to the invention in that the housing has a first housing assembly and a second housing assembly rotatable relative to the first housing assembly about the longitudinal axis of the outlet tube and lockable in at least two rotational positions by means of a locking device, wherein the valve is arranged in the first housing assembly in a rotationally fixed manner, and wherein the outlet tube is rotatable relative to the valve about the longitudinal axis of the outlet tube and is connected to the second housing assembly in a rotationally fixed manner, wherein the second housing assembly surrounds at least a section of the outlet tube in the circumferential direction.

[0007] The spray gun according to the invention comprises a housing with a first housing assembly and a second housing assembly. The second housing assembly is rotatable relative to the first housing assembly about the longitudinal axis of the outlet tube and can be locked in at least two rotational positions by means of a locking device. The valve of the spray gun is arranged in the first housing assembly in a rotationally fixed manner. The outlet tube, which is in flow communication with the valve, is rotatable relative to the valve about the longitudinal axis of the outlet tube and is rotationally fixed to the second housing assembly, wherein at least a portion of the outlet tube is circumferentially surrounded by the second housing assembly. The outlet tube can be circumferentially surrounded by the second housing assembly over its entire length or only over a portion of its length.

[0008] The liquid outlet of the spray gun is located at the end of the outlet tube furthest from the valve. By rotating the second housing assembly relative to the first housing assembly about the longitudinal axis of the outlet tube, the user can rotate the outlet tube, which is fixedly connected to the second housing assembly, relative to the valve about the longitudinal axis of the outlet tube. This allows the liquid outlet located at the free end of the outlet tube, and any dispensing unit connected to the liquid outlet, to also be rotated about the longitudinal axis of the outlet tube.By rotating the second housing assembly relative to the first, the user can easily change the orientation of the dispensing unit and, for example, adjust it to the orientation of a surface area of ​​the object being cleaned that is currently exposed to the liquid, without having to reorient the entire spray gun relative to the longitudinal axis of the outlet tube. The rotation of the second housing assembly can be performed while liquid is being dispensed, i.e., with the liquid under pressure.

[0009] If, for example, a flat jet nozzle is used as the discharge unit, the orientation of the jet plane of the liquid jet emitted by the flat jet nozzle can be easily adjusted to the orientation of the surface area of ​​the object to be cleaned that is currently exposed to the liquid by rotating the second housing unit relative to the first housing unit around the longitudinal axis of the jet tube.

[0010] For example, an angled spray lance can also be used as a discharge unit, the outlet section of which, facing away from the spray gun, is aligned at an angle to an inlet section of the spray lance facing the spray gun.

[0011] To prevent the rotational position of the second housing assembly from changing unintentionally relative to the first housing assembly, the second housing assembly can be locked in at least two rotational positions. For this purpose, the spray gun according to the invention has a locking device.

[0012] The spray gun according to the invention enables easy alignment of the liquid jet onto an object to be cleaned. The first housing unit, which accommodates the valve, can assume an ergonomically advantageous orientation, and the second housing unit can be adjusted in its rotational position relative to the first housing unit to accommodate different surface areas of the object being cleaned. The locking mechanism of the second housing unit relative to the first housing unit ensures that the second housing unit does not perform an unintentional rotational movement relative to the first housing unit in at least two rotational positions.

[0013] It is advantageous if the second housing assembly can be locked in at least three rotational positions using the locking device.

[0014] Preferably, the second housing device can be locked in several rotational positions, each of which is arranged offset from each other at a predetermined angle of rotation, for example at an angle of rotation of 30°, 45°, 60° or 90°.

[0015] It is advantageous if the section of the outlet pipe surrounded by the second housing assembly forms an outlet section of the outlet pipe facing away from the valve. In such an embodiment of the invention, the second housing assembly preferably extends to the end of the outlet pipe facing away from the valve, where the liquid outlet of the spray gun is located.

[0016] Preferably, the liquid outlet protrudes at least partially from the end of the second housing assembly facing away from the first. This facilitates the mounting of a discharge unit, such as a spray lance, a spray nozzle, or a washing brush, at the liquid outlet.

[0017] In an advantageous embodiment of the invention, an inlet section of the outlet pipe is positioned upstream of the section of the outlet pipe enclosed by the second housing assembly. This inlet section is circumferentially surrounded by the first housing assembly. In such an embodiment, an inlet section of the outlet pipe projects out of the second housing assembly in the direction of the valve and is circumferentially surrounded by the first housing assembly. In this embodiment, the separation of the second housing assembly from the first housing assembly is offset, relative to the longitudinal axis of the outlet pipe, from the end of the outlet pipe facing the valve. This increases the mechanical stability of the spray gun.

[0018] In particular, it may be provided that the section of the outlet pipe surrounded by the second housing device is at most as long as the inlet section of the outlet pipe surrounded by the first housing device.

[0019] Preferably, the inlet section of the outlet pipe is rotatably mounted in the first housing assembly about the longitudinal axis of the outlet pipe. The first housing assembly can have at least one bearing element, for example a bearing rib, to support the inlet section. The at least one bearing element is preferably integrally formed with the first housing assembly.

[0020] It is particularly advantageous if the inlet section of the outlet pipe is rotatably mounted on at least one bearing element, arranged or formed on the inside of the first housing assembly, via at least one tolerance compensation element. The at least one bearing element enables a rotatable mounting of the inlet section of the outlet pipe within the first housing assembly in a structurally simple manner. The mounting can be achieved using several bearing elements positioned at intervals relative to each other along the longitudinal axis of the outlet pipe. The inlet section is mounted on at least one bearing element via a tolerance compensation element located between the bearing element and the inlet section. This tolerance compensation element allows for the simple compensation of tolerances, particularly manufacturing tolerances, between the inlet section and the first housing assembly.This allows for a particularly uniform rotational movement of the input section relative to the first housing assembly. It is advantageous if at least one tolerance compensation element is elastically deformable.

[0021] In particular, it may be provided that the at least one tolerance compensation element is designed as an O-R.ing that surrounds the inlet section of the outlet pipe in the circumferential direction.

[0022] In a preferred embodiment of the invention, the outlet pipe is rotatably mounted on the valve and is liquid-tight. In this embodiment, the outlet pipe connects directly to the valve. This allows for a particularly compact design of the spray gun.

[0023] It is advantageous if the second housing assembly can be rotated relative to the first housing assembly over a predetermined rotational angular range of less than 360° around the longitudinal axis of the outlet tube. In particular, the rotational angular range can be a maximum of 300°, for example, 270° or 180°. A rotational angular range of less than 360° has the advantage that the spray gun exhibits particularly high mechanical stability. Furthermore, a rotational angular range of less than 360° allows at least one signal transmission line to be arranged in the interior area of ​​the housing not encompassed by the predetermined rotational angular range, without this line being affected by a rotational movement of the second housing assembly relative to the first.Control signals can be transmitted via the signal transmission line, for example, from a signal receiving device located adjacent to the liquid outlet and coupled, either contactlessly or with contact, to a dispensing unit connected to the liquid outlet, to a display and / or signal processing unit of the spray gun. The display unit can show, in particular, flow parameters of the liquid, such as its pressure and / or flow rate. It is particularly advantageous if the second housing unit is mounted axially immovably on the first housing unit and rotatably about the longitudinal axis of the outlet tube. In such an embodiment of the invention, the second housing unit connects directly to the first housing unit. This simplifies the manufacture and assembly of the spray gun and gives it a high degree of compactness.

[0024] The axially immovable and rotatable bearing of the second housing assembly on the first housing assembly can be achieved, for example, by means of an annular groove arranged on the inside of one of the two housing assemblies and an annular flange arranged on the other of the two housing assemblies and immersing in the annular groove.

[0025] The annular groove can, for example, be located on the inside of the first housing device and the annular flange can be positioned on a collar of the second housing device that extends into the first housing device.

[0026] It is advantageous if the first housing unit and the second housing unit each have two housing halves that can be detachably connected to each other. In particular, it can be provided that the housing halves can each be screwed together.

[0027] In a preferred embodiment of the spray gun according to the invention, the locking device has an actuating element that the user can move from a locking position to a release position against a restoring force. When the actuating element assumes its locking position, the rotational position of the second housing assembly relative to the first housing assembly is locked. If the rotational position is to be changed, the user can move the actuating element from the locking position to a release position against a restoring force, so that the second housing assembly can be rotated about the longitudinal axis of the outlet tube.

[0028] The actuating element advantageously forms a push button. This simplifies the handling of the locking device and enables cost-effective manufacturing of the actuating element.

[0029] It is advantageous if the actuating element is rigidly connected to a first locking element, which in the at least two predetermined rotational positions of the second housing device interacts with a second locking element to lock the second housing device.

[0030] In a preferred embodiment of the invention, the first locking element forms a detent, for example a detent lug, wherein the detent can be engaged in a second locking element in the form of a detent recess in each of the at least two predetermined rotational positions of the second housing assembly. In such an embodiment, the locking device enables a detent connection between the second housing assembly and the first housing assembly in the predetermined rotational positions of the second housing assembly. This results in a further simplification of the handling of the spray gun according to the invention.

[0031] It is advantageous if the actuating element is arranged on the second housing device, wherein the first locking element protrudes from the second housing device and is inserted into the first housing device, wherein a second locking element is arranged on the inside of the first housing device in at least two predetermined rotational positions.

[0032] Preferably, the first locking element is aligned parallel to the longitudinal axis of the outlet tube. The locking device preferably has two retaining arms that are rigidly connected to the actuating element and are rotationally fixed to opposite outer surfaces of the section of the outlet tube enclosed by the second housing assembly. This increases the mechanical stability of the spray gun and provides the user with a structurally simple way to apply a torque to the outlet tube via the actuating element when rotating the second housing assembly relative to the first housing assembly.

[0033] In a preferred embodiment of the invention, the retaining arms of the actuating element are slidably mounted in retaining receptacles, which are located opposite each other on the outside of the section of the outlet tube surrounded by the second housing assembly. In combination with their respective retaining receptacles, the retaining arms form a rotationally fixed connection between the actuating element and the outlet tube and provide a guide for the actuating element during its movement between the locking position and the release position.

[0034] The following description of an advantageous embodiment of the invention, in conjunction with the drawing, serves for further explanation. The drawing shows:

[0035] Figure 1: a perspective view of a spray gun;

[0036] Figure 2: a side view of the spray gun from Figure 1, with one housing half of a first housing assembly and one housing assembly hidden;

[0037] Figure 3: a perspective view of detail X from Figure 1 in the style of an exploded view;

[0038] Figure 4: a perspective view of detail Y from Figure 2; Figure 5: a partially cropped perspective view of detail Y from Figure 2;

[0039] Figure 6: a sectional view along line 6-6 from Figure 5, with an actuating element in a locking position;

[0040] Figure 7: a sectional view corresponding to Figure 6, with the actuating element in a release position.

[0041] The drawing schematically illustrates an advantageous embodiment of a spray gun according to the invention, which is designated by reference numeral 10. The spray gun 10 has a housing 12 comprising a first housing assembly 14 and a second housing assembly 16. The first housing assembly 14 is formed by a first housing half-shell 18 and a second housing half-shell 20, which are screwed together, and the second housing assembly 16 is formed by a third housing half-shell 22 and a fourth housing half-shell 24, which are also screwed together.

[0042] An electrical device 26 is mounted on the first housing unit 14, which is designed to be splash-proof and is detachably connected to the first housing unit 14.

[0043] Housing 12 is designed in the style of a pistol housing.

[0044] The first housing assembly 14 surrounds a valve 28, which is fixedly arranged within the first housing assembly 14. The valve 28 has a valve housing 30 with a valve inlet 32, which forms a liquid inlet 34 of the spray gun 10, and with a valve outlet, which is arranged at the free end of an outlet-side agitator 36 of the valve housing 30. The valve housing 30 forms a conventional through-channel extending from the valve inlet 32 ​​to the valve outlet, in which a closing element is movably held. This closing element is displaceable back and forth between a closed position, in which it rests against a valve seat, and an open position, in which it is spaced away from the valve seat. Such valves are known to those skilled in the art and therefore require no further explanation here.

[0045] The first housing assembly 14 forms a handle 38, which is designed in the manner of a pistol grip, and a protective guard 40, which extends from the free end of the handle 38 to a housing area in which the valve 28 is located. Together with the handle 38, the protective guard 40 surrounds a grip opening 42 into which the user can insert their fingers when gripping the handle 38.

[0046] In the first housing assembly 14, a control element in the form of a control lever 44 is pivotably mounted. This lever is mechanically coupled to the closing element of the valve 28 in a manner known per se and extends along the side of the handle 38 facing the handle opening 42. The user can grasp the control lever 44 with their fingers, together with the handle 38. By pivoting the control lever 44, the valve 28 can be controlled so that the closing element of the valve 28 assumes its closed or open position, depending on the pivot position of the protective bracket 40.

[0047] A mixing element 36 of the valve housing 30 is connected to an outlet pipe 46, which is rotatably and liquid-tightly connected to the pipe section 36 about a longitudinal axis 48 of the outlet pipe 46. The first housing assembly 14 surrounds an inlet section 50 of the outlet pipe 46 facing the valve 28, and the second housing assembly 16 surrounds an outlet section 52 of the outlet pipe 46 adjoining the inlet section 50. The inlet section 50 is rotatably mounted in the first housing assembly 14 about the longitudinal axis 48, whereas the outlet section 52 is rotationally fixed to the second housing assembly 16. A liquid outlet 54 of the spray gun 10 is arranged at the end of the outlet section 52 facing away from the valve 28.The rotatable mounting of the inlet section 50 in the first housing assembly 14 is achieved by means of several bearing elements 51, 53, and 55 formed on the inside of the first housing assembly 14. These bearing elements are designed as annular bearing ribs, with the inlet section 50 being supported on the bearing element 55 by an interposed tolerance compensation element 57. This element is designed as an elastically deformable O-ring that surrounds the inlet section 50 in the circumferential direction. This is particularly evident from Figures 2, 4, and 5. The bearing elements 51, 53, and 55 are each formed by two opposing bearing ring segments. These segments extend in the circumferential direction over an angle of 180° around the inlet section and are formed on the inner surfaces of the first housing half-shell 18 and the second housing half-shell 20. Only one bearing ring segment is visible in each drawing.

[0048] The second housing assembly 16 is axially immovable on the first housing assembly 14 and rotatable over a predetermined rotational angular range of less than 360° about the longitudinal axis 48 of the outlet pipe 46. For this purpose, the first housing half-shell 18 and the second housing half-shell 20 jointly form an annular groove 56 on their inner sides in their end region immediately upstream of the second housing assembly 16, and the third housing half-shell 22 and the fourth housing half-shell 24 jointly form an annular flange 58 facing the first housing assembly 14, which is arranged on a collar 59 that extends into the first housing assembly 14 and engages in the annular groove 56. This is particularly evident from Figures 3, 4, and 5.

[0049] As already mentioned, the second housing assembly 16 is rotatable relative to the first housing assembly 14 over a predetermined rotational angular range of less than 360° about the longitudinal axis 48 of the outlet tube 46. In the illustrated embodiment, the predetermined rotational angular range is 180°. The second housing assembly 16 can be locked relative to the first housing assembly 14 in three predetermined rotational positions. For this purpose, the spray gun 10 has a locking device 60. The locking device 60 has an actuating element 62, which is arranged on the second housing assembly 16 at a short distance from the first housing assembly 14 and is designed as a push button 64 in the illustrated embodiment.The push button 64 protrudes from a housing recess 66 formed jointly by the third housing half-shell 22 and the fourth housing half-shell 24 and can be moved by the user from a locking position shown in Figures 4, 5 and 6 against the force of a return spring 68 to a release position shown in Figure 7. The return spring 68 is supported on one side by the outside of the outlet section 52 of the outlet tube 46 and on the other side by a spring retainer 70 of the actuating element 62 facing the outlet tube 46.

[0050] Towards the first housing assembly 14, a first locking element 72 of the locking device 60 is connected to the actuating element 62. This first locking element is designed as a detent in the form of a detent lug 74. The first locking element 72 extends parallel to the longitudinal axis 48 from the actuating element 62 towards the first housing assembly 14 and, in three predetermined rotational positions of the second housing assembly 16, interacts with a second locking element 76, 78, 80 to lock the second housing assembly 16. The second locking elements 76, 78, 80 are each designed as a detent recess 82, 84, 86 arranged on the inside of the first housing half-shell 18 and the second housing half-shell 20, respectively. These recesses are complementary to the detent lug 74 and are arranged at an angular distance of 90° to each other with respect to the longitudinal axis 48. This is particularly evident from Figures 6 and 7.

[0051] The second locking elements 76, 78 and 80 define predefined rotational positions in which the second housing assembly 16 can be locked relative to the first housing assembly 14. The second locking elements 76, 78 and 80 are evenly distributed over a total rotational angular range of 180°.

[0052] In the specified rotational positions, the locking lug 74 engages positively in a locking recess 82, 84, 86 when the push button 64 assumes its locking position. To release the lock, the user can move the push button 64 against the force of the return spring 68 towards the outlet tube 46. This causes the locking lug 74 to engage in a longitudinal groove 88 located on the outside of the outlet tube 46 and releases the respective locking recess 82, 84, 86, so that the second housing assembly 16 can be rotated about the longitudinal axis 48 relative to the first housing assembly 14.

[0053] The detent recess 84 defines a central position of the second housing assembly 16, and the detent recesses 82 and 86 each define an end position of the second housing assembly 16. A stop element 90, 92 is attached to the sides of the detent recesses 82 and 86 facing away from the central detent recess 84. This stop element projects into the interior of the first housing assembly 14 in the direction of the outlet tube 46 and limits the rotational movement of the second housing assembly 16. For this purpose, the stop elements 90, 92 project sufficiently into the interior of the first housing assembly 14 to limit the rotational movement of the detent lug 74 even when the push button 64 is in its release position. The two stop elements 90, 92 thus define the range of rotation through which the second housing assembly 16, together with the outlet tube 46, can be rotated relative to the first housing assembly 14.

[0054] At the level of the actuating element 62, the outlet tube 46 has two retaining receptacles 94, 96, which are opposite each other on the outside of the outlet tube 46 and in which a retaining arm 98, 100, rigidly connected to the push button 64, is slidably mounted. The retaining arms 98, 100 extend through the retaining receptacles 94, 96 and, in combination with the retaining receptacles 94, 96, form a guide for the push button 64 during its movement between the locking position and the release position, and simultaneously provide a rotationally fixed connection between the push button 64 and the outlet tube 46.

[0055] The spray gun 10 allows manual control of the dispensing of pressurized liquid from a high-pressure cleaner. A supply line, such as a pressure hose, can be connected to the liquid inlet 34. Pressurized liquid from the high-pressure cleaner can be supplied to the spray gun 10 via this supply line. The liquid inlet 34 is connected to the liquid outlet 54 via the valve 28 and the outlet pipe 46. By actuating the control lever 44, the user can selectively open and close the flow connection to control the liquid dispensing. A dispensing unit, such as a spray lance, a spray nozzle, or a washing brush, can be connected to the liquid outlet.A flat jet nozzle can be used as a discharge unit, enabling the pressurized liquid to be dispensed in the form of a jet that spreads out in a fan shape within a single jet plane. The user can change the orientation of the flat jet nozzle, and thus the orientation of the jet plane, by rotating the second housing assembly 16 relative to the first housing assembly 14 about the longitudinal axis 48 of the outlet pipe 46. The outlet pipe 46 is rotationally fixed to the second housing assembly 16, so that the outlet pipe 46, and together with it the liquid outlet 54 and the flat jet nozzle connected to it, can be rotated by rotating the second housing assembly 16 about the longitudinal axis 48.The user can thus easily change the orientation of the jet plane of the liquid jet emanating from the flat jet nozzle by rotating the second housing unit 16 relative to the first housing unit 14 about the longitudinal axis 48. As an alternative to a flat jet nozzle, an angled spray lance, for example, can also be used as a discharge unit and connected to the liquid outlet 54. The orientation of the angled spray lance can also be changed by rotating the second housing unit 16. The same applies, for example, to the use of a discharge unit in the form of a washing brush, the orientation of which can also be changed by rotating the second housing unit 16.

Claims

PATENT CLAIMS 1. Spray gun for a high-pressure cleaning device comprising a liquid inlet (34) for pressurized liquid, a liquid outlet (54) for dispensing the liquid, and a housing (12) in which a valve (28) and an outlet pipe (46) in flow communication with the valve (28) are arranged, wherein the valve (28) for controlling the liquid dispensing is positioned in a flow path between the liquid inlet (34) and the liquid outlet (54) and can be opened and closed by means of a control element (44), and wherein the liquid outlet (54) is arranged at an end of the outlet pipe (46) facing away from the valve (28), characterized in thatthat the housing (12) comprises a first housing assembly (14) and a second housing assembly (16) rotatable relative to the first housing assembly (14) about the longitudinal axis (48) of the outlet pipe (46) and lockable in at least two rotational positions by means of a locking device (60), wherein the valve (28) is arranged in the first housing assembly (14) in a rotationally fixed manner, and wherein the outlet pipe (46) is rotatable relative to the valve (28) about the longitudinal axis (48) of the outlet pipe (46) and is rotationally fixedly connected to the second housing assembly (16), wherein the second housing assembly (16) surrounds at least a portion of the outlet pipe (46) in the circumferential direction.

2. Spray gun according to claim 1, characterized in that the second housing device (16) can be locked in at least three rotational positions by means of the locking device (60).

3. Spray gun according to claim 1 or 2, characterized in that the second housing device (16) can be locked in several rotational positions, each offset from the others by a predetermined angle of rotation. are arranged, in particular at a rotation angle of 30°, 45°, 60° or 90°.

4. Spray gun according to one of the preceding claims, characterized in that the portion of the outlet pipe (46) surrounded by the second housing device (16) forms an outlet portion (52) of the outlet pipe (46) facing away from the valve (28).

5. Spray gun according to one of the preceding claims, characterized in that an inlet section (50) of the outlet pipe (46) is positioned upstream of the portion of the outlet pipe (46) surrounded by the second housing device (16), which is surrounded in the circumferential direction by the first housing device (14).

6. Spray gun according to claim 5, characterized in that the inlet section (50) is rotatably mounted in the first housing device (14) about the longitudinal axis (48) of the outlet tube (46).

7. Spray gun according to claim 6, characterized in that the inlet section (50) is rotatably mounted on at least one bearing element (55) via at least one tolerance compensation element (57), which is arranged or formed on the inside of the first housing device (14).

8. Spray gun according to claim 7, characterized in that the at least one tolerance compensation element (57) is elastically deformable.

9. Spray gun according to one of the preceding claims, characterized in that the outlet pipe (46) is rotatably mounted on the valve (28).

10. Spray gun according to one of the preceding claims, characterized in that the second housing device (16) is rotatable relative to the first housing device (14) over a predetermined rotation angle range of less than 360° about the longitudinal axis (48) of the outlet tube (46).

11. Spray gun according to one of the preceding claims, characterized in that the second housing device (16) is mounted axially immovably and rotatably about the longitudinal axis (48) of the outlet tube (46) on the first housing device (14).

12. Spray gun according to claim 11, characterized in that an annular groove (56) is arranged on the inside of one of the two housing devices (14, 16), and that an annular flange (58) is arranged on the other of the two housing devices (14, 16) which dips into the annular groove (56).

13. Spray gun according to claim 12, characterized in that the annular groove (56) is arranged on the inside of the first housing device (14) and the annular flange (58) is arranged on a collar (59) of the second housing device (16) which extends into the first housing device (14).

14. Spray gun according to one of the preceding claims, characterized in that the locking device (60) has an actuating element (62) which can be moved by the user from a locking position to a release position against a restoring force.

15. Spray gun according to claim 14, characterized in that the actuating element (62) forms a push button (64).

16. Spray gun according to claim 14 or 15, characterized in that the actuating element (62) is rigidly connected to a first locking element (72) which, in the at least two predetermined rotational positions of the second housing device (16), interacts with a second locking element (76, 78, 80) to lock the second housing device (16).

17. Spray gun according to claim 16, characterized in that the first locking element (72) forms a detent element (74) which can be engaged in a second locking element (76, 78, 80) in the form of a detent recess (82, 84, 86) in the at least two predetermined rotational positions of the second housing device (16).

18. Spray gun according to claim 16 or 17, characterized in that the actuating element (62) is arranged on the second housing device (16), wherein the first locking element (72) projects out of the second housing device (16) and is inserted into the first housing device (14), wherein a second locking element (76, 78, 80) is arranged on the inside of the first housing device (14) in at least two predetermined rotational positions.

19. Spray gun according to claim 18, characterized in that the first locking element (72) is aligned parallel to the longitudinal axis (48) of the outlet tube (46).

20. Spray gun according to one of claims 14 to 19, characterized in that the locking device (60) has two retaining arms (98, 100) which are rigidly connected to the actuating element (62) and are held in a rotationally fixed manner on opposite outer surfaces of the portion of the outlet tube (46) surrounded by the second housing device (16).

21. Spray gun according to claim 20, characterized in that the retaining arms (98, 100) are slidably mounted in retaining receptacles (94, 96) which are opposite each other on the outside of the part of the outlet tube (46) surrounded by the second housing device (16).

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