CN109070107B

CN109070107B - Valve gun for high pressure cleaner

Info

Publication number: CN109070107B
Application number: CN201680084621.XA
Authority: CN
Inventors: 米夏埃尔·梅尔; 克里斯多佛·布罗伊尔; 拉尔夫·赛特
Original assignee: Alfred Kaercher SE and Co KG
Current assignee: Alfred Kaercher SE and Co KG
Priority date: 2016-05-13
Filing date: 2016-05-13
Publication date: 2021-05-11
Anticipated expiration: 2036-05-13
Also published as: CN109070107A; EP3454992A1; DK3454992T3; EP3454992B1; WO2017194169A9; WO2017194169A1

Abstract

The invention relates to a valve gun (10, 120, 140) for a high-pressure cleaner, comprising a gun housing (12) having a handle (28), and having a valve (38) which is arranged in the gun housing (12) between a liquid inlet (48, 142) and a liquid outlet (22, 154), said valve having a closing body (60) which, in the closed position, bears in a liquid-tight manner against a valve seat (58) and can be moved into an open position by displacement of a valve tappet (68), and having a manually movable actuating element (70) for displacing the valve tappet (68), wherein the liquid outlet (22, 154) is arranged on a front side (20) of the gun housing (12), and the actuating element (70) has an actuating surface (82, 166) which is arranged on a rear side (84) of the handle (28) facing away from the liquid outlet (22, 154). In order to improve the valve gun (10, 120, 140) such that it has a design which is simpler in design, it is proposed that the actuating element (70) has a force application element (74, 128, 160) which can be brought into abutment against the valve tappet (68).

Description

Valve gun for high pressure cleaner

Technical Field

The invention relates to a valve gun for a high-pressure cleaner for controlling the discharge of cleaning liquid, having a gun housing with a handle, having a valve arranged in the gun housing in a flow path between a liquid inlet and a liquid outlet, having a closing body which in a closed position rests liquid-tightly on a valve seat and can be moved into an open position by displacement of a valve tappet, and having a manually movable actuating mechanism for displacing the valve tappet, wherein the liquid outlet is arranged on a front side of the gun housing, and the actuating mechanism has an actuating surface which is arranged on a rear side of the handle facing away from the liquid outlet.

By means of such a valve gun it is possible to control the discharge of cleaning liquid which is put under pressure by the high-pressure cleaner. As cleaning liquid, water is generally used, which can be mixed with cleaning chemicals. A pressure hose is connected to the liquid inlet of the valve gun, for example. Via the pressure hose, cleaning liquid under pressure can be delivered to the valve gun. A spray gun, for example, is connected to the liquid outlet of the valve gun. The cleaning liquid can be directed at the object via the spray gun.

To control the liquid discharge, a user may operate the operating mechanism of the valve gun and thereby open the valve arranged in the flow path between the liquid inlet and the liquid outlet. The operating mechanism is mechanically coupled to the valve lifter. The valve tappet can be pushed by actuating the actuating element and the closing body of the valve can thereby be moved from a closed position, in which it bears against the valve seat in a fluid-tight manner, into an open position, in which it is at a distance from the valve seat. The liquid inlet is in fluid connection with the liquid outlet when the closure is in the open position. If the user releases the operating mechanism again after the operation is completed, the closing body returns from its open position to the closed position again, and thereby the fluid connection between the fluid inlet and the fluid outlet is interrupted.

Background

A manually controlled nozzle is known from document GB 513013 a1, in which an operating mechanism is pivotably supported on a liquid outlet and is coupled with a valve tappet via a crank lever. This is a considerable construction effort.

A valve gun is known from DE 60317447T 2, in which an actuating lever is pivotably mounted in a central region of a gun housing. This actuating lever is coupled to a trigger lever, which is likewise arranged on the front side of the handle facing the liquid outlet, like the actuating lever. This lever can be operated by the user with a finger in the manner of a conventional trigger (Abzughebel). In the case of longer operation, this may lead to user fatigue.

The handle of the valve gun has an upper end region assigned to the thumb and the index finger of the user and a lower end region facing away from this upper end region. In the valve gun known from DE 3431800 a1, the liquid inlet and the liquid outlet are arranged adjacent to the lower end region of the handle. An operating mechanism in the form of a hand lever is arranged on the front side of the handle facing the liquid outlet and can be operated by the user with a finger in the manner of a conventional trigger. As already mentioned, this can lead to fatigue of the user in the case of longer operation.

Another valve gun is known from DE 10237428B 3, in which an actuating mechanism in the form of a handle is formed, which is arranged on the front side of the handle facing the liquid outlet.

Document WO 2015/086085 a1 discloses a valve gun in which the operating mechanism has an operating face on the back side of the handle facing away from the liquid outlet. The arrangement of the actuating surface on the rear side of the handle has the advantage that the user can actuate the actuating mechanism with his fish, wherein the valve gun is pressed against the user's fish under the influence of the recoil of the cleaning liquid output from the liquid outlet. This makes the operation of the valve gun easier because the burden on the fingers of the user is reduced. The actuating mechanism is coupled to the valve tappet via a coupling rod in the valve gun known from WO 2015/086085 a 1.

Disclosure of Invention

The object of the invention is to improve a valve gun of this generic type in such a way that it has a simpler design.

The object is achieved according to the invention in a valve gun of the type mentioned at the outset in that the actuating mechanism has a force application element which can be brought into abutment against the valve tappet.

In the valve gun according to the invention, the actuating force applied by the user to the actuating mechanism via the actuating surface can be transmitted from the force application element of the actuating mechanism to the valve tappet without using additional mechanical coupling elements. The force application element may abut against the valve tappet. The operating force may be applied to the valve tappet by a force application element. The valve gun according to the invention is therefore distinguished by a constructionally simple manner, which can be operated easily by the user even for long operating durations in order to discharge the cleaning liquid under pressure in a controlled manner.

The actuating mechanism is advantageously provided with an actuating body with an actuating surface, wherein the actuating surface projects outward from the rear side of the handle when the actuating body is in the rest position, and wherein the actuating body can be moved by the operator using the thenar into the release position, wherein the force application element is arranged on the actuating body.

In the rest position, the force application element can rest loosely on the valve tappet.

If the operating body is moved by an operator from a rest position into a release position, a force application element arranged on the operating body applies an operating force to the valve tappet. As a result, the valve tappet moves the closing body of the valve into the open position.

The valve tappet can be rigidly connected to the closing body of the valve. In particular, it can be provided that the valve tappet is integrally connected to the closing body, so that the valve tappet together with the closing body forms a common component, which can be made of metal, for example.

The closing body can be designed, for example, as a sphere or as a cone, which is moved by the valve tappet from the closed position into the open position.

Advantageously, the valve has a closing spring which exerts a closing force on the closing body in the direction of the valve seat. The closing body can be moved into its open position by the valve tappet by means of the operating mechanism counter to the action of the closing force exerted by the closing spring. The movement of the closing body from the closed position into the open position is thus effected against the action of the closing spring and, in addition, against the pressure of the cleaning liquid acting on the closing body.

The force-exerting element of the actuating mechanism can be designed, for example, in the form of a cam, a nose, a stop or a follower, or, for example, in the form of a receptacle into which the valve tappet is sunk with the end facing away from the closing body.

In an advantageous embodiment of the invention, the force application element is connected integrally to the actuating body. For example, it can be provided that the force application element together with the actuating body forms a one-piece plastic or metal part.

Alternatively, it can be provided that the force application element forms a separate construction element which is held on the actuating body. The force application element can be designed, for example, in the form of a pin, which is fastened to the operating body.

It is particularly advantageous if the force application element is held adjustably on the actuating body. This makes it possible to adjust the force application element after the operating body has been mounted.

The force application element can be held, for example, in a sleeve-like receptacle of the actuating body, in particular it can be pressed or screwed into this sleeve-like receptacle.

Preferably, the force applying element is made of metal.

In an advantageous embodiment of the invention, the actuating body is designed as a plastic molding.

In an advantageous embodiment of the invention, a particularly simple actuation of the valve gun is achieved in that the actuating body can be pivoted back and forth about the first pivot axis between the rest position and the release position. The actuating body in this embodiment forms a trigger lever which can be pivoted by the user with the fish.

The first pivot axis is advantageously arranged adjacent to the valve tappet. A particularly advantageous lever ratio can thereby be achieved, so that the user can pivot the operating body from the rest position into the release position with little effort, and still be able to apply a considerable force to the valve tappet by means of the force-exerting element, under which force the closing body can be moved from its closed position into its open position.

The first pivot axis is arranged in an advantageous manner between the liquid outlet and the force-exerting element.

In an advantageous embodiment of the invention, the actuating body has an actuating body and a force transmission arm, wherein the actuating arm has an actuating surface, and wherein the force transmission arm is rigidly connected to the actuating arm and is mounted pivotably about the first pivot axis with its end region facing away from the actuating arm.

The actuating arm and the force transmission arm can be oriented at an angle to one another, it being possible in particular for the actuating arm to be oriented substantially at right angles to the force transmission arm.

The operating arm is preferably arranged at least regionally in the handle and the force transmission arm is preferably arranged at least regionally in the gun housing outside the handle.

Preferably, the actuating arm extends from an upper end region of the handle assigned to the thumb and the index finger of the user to a lower end region of the handle facing away from the upper end region of the handle.

The force transmission arm advantageously extends from the upper end region of the handle in the direction of the liquid outlet. In particular, it can be provided that the force transmission arm extends from an upper end region of the grip to a front housing region of the gun housing.

The force transmission arm is shorter than the actuating arm in an advantageous embodiment of the invention. For example, it can be provided that the force transmission arm is no longer than half the length of the actuating arm.

The force transmission arm can be mounted on the gun housing, preferably with its end region facing away from the actuating arm, so as to be pivotable about a first pivot axis.

As an alternative, it can be provided that the force transmission arm, preferably with its end region facing away from the actuating arm, is mounted pivotably about the first pivot axis on the valve.

In an advantageous embodiment of the invention, the valve has a valve housing with a valve inlet which is in flow connection with the valve outlet via a through-channel, wherein the valve seat and the closing body are arranged in the through-channel, and the valve tappet passes sealingly through a tappet channel of the valve housing and sinks into the through-channel. The closing body can be arranged on the end of the valve tappet that is immersed in the through-channel, and the valve tappet can project out of the valve housing with its end facing away from the closing body. The force application element of the actuating mechanism can rest loosely on the end of the valve tappet that projects outward from the valve housing.

In a preferred embodiment of the invention, the liquid inlet is connected in flow communication with the valve inlet via an inflow line. The cleaning liquid under pressure fed to the liquid inlet can be conducted to the valve inlet via the inflow line.

In an advantageous embodiment of the invention, at least one section of the inflow line is arranged in a bow guard of the gun housing. As already mentioned, the handle has an upper end region assigned to the thumb and the index finger of the user and a lower end region facing away from this upper end region. The protective bow adjoins the lower end region of the handle and connects it to the front housing region of the gun housing, on which the liquid outlet is arranged. Between the guard bow and the handle there is a grip opening into which a user can insert his fingers when holding the handle.

In an alternative embodiment of the invention, at least one section of the inflow line is arranged in the handle. This embodiment is particularly advantageous, in particular, when the liquid inlet is arranged in the lower end region of the handle. The inflow line may be at the liquid inlet, wherein at least a section of the inflow line extends within the handle.

It may be provided that the valve inlet is arranged in the upper end region of the handle and that the entire length of the inflow line extends within the handle.

In an advantageous embodiment of the invention, the valve outlet is connected to the liquid outlet via a drain line.

In an advantageous manner, the outlet line is connected integrally to the valve housing.

It can be provided that at least one section of the drainage line is arranged in the gun housing outside the handle.

The discharge line can extend, for example, from the upper end region of the handle to the front side of the gun housing.

Advantageously, the valve gun comprises a return spring associated with the actuating body, which return spring exerts a return force on the actuating body in the direction of the closed position. In such a design, the user can move the operating body from the rest position into the release position against the restoring force exerted by the restoring spring. If the user releases the operating body, it is moved into the rest position by a return spring assigned to the operating body.

Alternatively or additionally, it can be provided that, when the user releases the actuating body, the actuating body is automatically moved into its rest position on the basis of the force exerted by the closing body of the valve via the valve tappet on the force-exerting element. As already mentioned, the closure body is transferred from the rest position into the open position against the pressure of the cleaning liquid acting on the closure body. If the user releases the actuating body, the actuating force exerted by the actuating body on the closing body via the force application element and the valve tappet is cancelled and the closing body is transferred again into its closed position under the pressure of the cleaning liquid, wherein the closing body displaces the valve tappet and the valve tappet again exerts a restoring force on the force application element and the actuating body.

In an advantageous embodiment of the invention, the valve gun has a locking mechanism which can be moved back and forth between a locking position and an unlocking position for locking the actuating mechanism. By means of this locking mechanism, the operating mechanism can be prevented from moving accidentally. If the locking mechanism occupies its locked position, it locks the operating mechanism so that it cannot move relative to the gun housing in practice. The operating mechanism is movable relative to the gun housing if the locking mechanism occupies its unlocked position.

It is particularly advantageous if the locking mechanism is arranged on the front side of the handle facing the liquid outlet. If the user grips the handle of the gun housing with his hand, he can intuitively move the locking mechanism arranged on the front side of the handle from the locking position to the unlocking position, so that he can subsequently move the operating mechanism, thereby applying an operating force to the valve tappet to open the valve.

It may be provided that the locking mechanism is displaceably supported on the gun housing. For example, the locking mechanism can be linearly displaceable supported.

In an advantageous embodiment of the invention, the locking mechanism is mounted so as to be pivotable about a pivot axis associated with the locking mechanism. This makes possible a simple design of the valve gun.

The pivot axis associated with the locking mechanism is advantageously oriented parallel to the first pivot axis associated with the actuating body.

It is particularly advantageous if the pivot axis associated with the locking mechanism is arranged in the region of the upper end of the grip or in a region of the gun housing adjacent to the region of the upper end of the grip. The user grasps the upper end region of the handle with his thumb and forefinger, and can then simultaneously pivot the locking mechanism from the locked position into the unlocked position. This makes it possible to operate the valve gun particularly easily.

In an advantageous embodiment of the invention, the locking mechanism has an actuating arm and a locking arm, wherein the actuating arm projects outwardly from a front side of the handle facing the liquid outlet when the locking mechanism is in the locking position, and the locking arm blocks a movement of the actuating mechanism when the locking mechanism is in the locking position. The locking arm can, for example, rest with its free end against the operating element when the locking element is in the locked position, or the operating element can be at a small distance from one another, so that no significant movement of the operating element by the user is possible. When the locking mechanism is in the unlocked position, the locking arm releases the operating mechanism so that it can be pivoted by a user from the rest position to the release position.

The locking arm and the actuating arm are advantageously oriented at an angle to one another.

For example, it can be provided that the locking arm is L-shaped, wherein the actuating arm forms a first branch and the locking arm forms a second branch of the locking mechanism.

Advantageously, the valve gun has a return spring associated with the locking mechanism, which spring exerts a return force on the locking mechanism in the direction of the locking position. If the user releases the locking mechanism, the locking mechanism automatically assumes the locking position on the basis of a reset force acting thereon, thereby blocking the movement of the operating mechanism.

Drawings

The following description of advantageous embodiments is intended to illustrate the invention in more detail in connection with the accompanying drawings. In the drawings:

fig. 1 shows a schematic front view of an advantageous first embodiment of a valve gun;

FIG. 2 shows a cross-sectional view of the valve gun along line 2-2 shown in FIG. 1;

FIG. 3 shows a sectional view corresponding to FIG. 2 of an advantageous second embodiment of the valve gun;

fig. 4 shows a sectional view corresponding to fig. 2 of an advantageous third embodiment of the valve gun.

Detailed Description

An advantageous first embodiment of a valve gun according to the present invention is schematically illustrated in fig. 1 and 2 and generally designated by reference numeral 10. Valve gun 10 includes a gun housing 12 formed of a first half shell 14 and a second half shell 16. The gun housing 12 has an elongate housing region 18, on the front side 10 of which a liquid outlet 22 is arranged. The liquid outlet 22 is designed in the form of an outlet bushing 24 with an external thread 26. A spray bar may be coupled to the outlet bushing 24, for example.

At a distance from the front side 20, a handle 28, which can be gripped by a user with his hand, protrudes from the elongate housing region 18. The handle 28 has an upper end region 30, which is connected in one piece to the elongate housing region 18 and is assigned to the thumb and index finger of the user, and a lower end region 32, which faces away from the upper end region 30, is arranged at a distance from the elongate housing region 18 and is assigned to the little finger of the user. A retaining bracket 34 is fastened to the lower end region 32, said retaining bracket extending from the lower end region 32 of the handle 28 to the front side 20 of the elongate housing region 18. The arch 34, the elongated housing region 18 and the handle 28 enclose a grip opening 36 into which a user can insert his fingers when gripping the handle 28.

A valve 38 with a valve housing 40 is arranged adjacent to the front side 20 in the elongated housing region 18. The valve housing 40 has a valve inlet 42 which is connected via an inflow line 44 extending within the retaining bracket 34 to an inlet bushing 46 projecting outwardly from the retaining bracket 34. Inlet bushing 46 forms a liquid inlet 48 of valve gun 10 and has external threads 50. A pressure hose can be connected to the inlet bushing 46, for example, by means of which cleaning fluid under pressure by the high-pressure cleaner can be supplied to the valve gun 10.

The valve inlet 42 is connected in flow communication with a valve outlet 54 of the valve housing 40 via a through-passage 52. The valve outlet 54 is integrally connected to the outlet bushing 24 that extends outwardly from the front side 20 of the gun housing 12.

The through-channel 52 has a first channel section 56 in which a valve seat 58 and a spherical closing body 60 of the valve 38 are arranged. The closing body 60 is pressed with a closing force by a closing spring 62 in the direction of the valve seat 58, so that it rests liquid-tightly against the valve seat 58 in the closed position.

A second channel section 64 of the through channel 52 is coupled to the first channel section 56 at an angle of approximately 90 °. The second channel section 64 extends to the valve outlet 54.

In addition to the through-channel 52, the valve housing 40 also has a tappet channel 66 which is aligned with the first channel section 56 and is penetrated by a valve tappet 68. The valve tappet 68 is enclosed in the tappet channel 66 by a sealing element, which is known per se and is therefore not shown in the figures for a better overview, and is held displaceably in the tappet channel 66. The valve tappet 68 is sunk into the through-channel 52. The closing body 60 is arranged on the end of the valve tappet 68 that is recessed into the through-channel 52. The valve tappet 68 projects outwardly from the valve housing 40 with its end facing away from the closing body 60.

To displace the valve tappet 68 and thus open and close the valve 38, the valve gun 10 has an actuating mechanism 70 with a substantially L-shaped actuating body 72 and a force application element 74 which is held adjustably on the actuating body 72. The actuating body 72 has an actuating arm 76 and a force transmission arm 78 rigidly connected thereto and directly adjacent thereto, which is oriented substantially at right angles to the actuating arm 76. The actuating arm 76 is arranged in the handle 28, wherein it extends from the lower end region 32 of the handle 28 to the upper end region 30 of the handle 28. The force transmission arm 78 is disposed in the elongate housing region 18 of the gun housing 12 and extends from the upper end region 30 of the grip 28 into the front housing region 80 of the gun housing 12. The front housing area 80 constitutes the front side 20 of the gun housing 12.

The actuating arm 76 has an actuating surface 82 which projects outwardly from a rear side 84 of the handle 28 facing away from the liquid outlet 22 and against which the user's thenar can rest when the user grips the handle 28.

The force transmission arm 78 is mounted on the valve housing 40 at its end facing away from the actuating arm 76 so as to be pivotable about a first pivot axis 88. The first pivot axis 88 is arranged adjacent to the valve tappet 68. The distance occupied between the first pivot axis 88 and the end of the valve lifter 68 that projects outwardly from the valve housing 40 is less than the length of the valve lifter 68.

The force application member 74 is adjustably retained on the force transfer arm at a small distance from the first pivot axis 88.

The first pivot axis 88 is disposed between the liquid outlet 22 and the force applying member 74. The force applying member 74 occupies a position between the first pivot axis 88 and the operating arm 76.

In order to displace the valve tappet 68, the actuating body 72 can be pivoted against the restoring force of a restoring spring 90 assigned to the actuating body 72 from the rest position shown in fig. 2 about the first pivot axis 88 (clockwise in fig. 2) into a release position, in which the actuating arm 76 is immersed in the handle 28 and the valve tappet 68 is displaced in the direction of the first channel section 56 of the through channel 52 on the basis of the actuating force acting on it by the force application element 74. This results in the closing body 60 being moved away from the valve seat 58 against the restoring force of the closing spring 62 acting on it and assuming the open position. When the closure body 60 is in the open position, the flow connection between the valve inlet 42 and the valve outlet 54 is open, so that cleaning liquid can flow through the valve 38. If the user releases the actuating body 72, it is pivoted back into the rest position by the return spring 90 assigned to it, so that no further actuating force is exerted by the force-exerting element 74 on the valve tappet 68, and the closing body 60, on the basis of the closing force exerted on it by the closing spring 62 and on the basis of the pressure of the cleaning liquid acting on it, assumes its closed position, in which it bears liquid-tightly against the valve seat 58 and thus breaks the flow connection between the valve inlet 42 and the valve outlet 54.

The operating mechanism 70 can be locked in its rest position shown in fig. 2. For this purpose, a substantially L-shaped locking mechanism 92 is mounted in the upper end region 30 of the handle 28, which locking mechanism can be pivoted about a second pivot axis 94 associated with this locking mechanism 92. A first branch of the locking mechanism 92 forms an actuating arm 96 which projects outwardly from a front side 98 of the handle 28 facing the liquid outlet 22 when the locking mechanism 92 is in the locking position shown in fig. 2. The second branch of the locking mechanism 92 forms a locking arm 100, which, when the locking mechanism 92 is in the locked position, rests with its free end 102 on the actuating body 72 and prevents it from pivoting.

If the user grips the handle 28 with his hand, he intuitively pivots the locking mechanism 92 with his fingers against the spring-elastic restoring force of the second restoring spring 104 assigned to this locking mechanism 92 into an unlocking position, not shown in the figures, in which the locking arm 100 releases the actuating body 72, so that it can be pivoted out of the blocking of the locking mechanism 92 about the first pivot axis 88 from the rest position shown in fig. 2 into a release position, not shown in fig. 2. When pivoting from the rest position into the release position, as already mentioned, valve tappet 68 is pushed by force application element 74 until closing body 60 releases the flow connection between valve inlet 42 and valve outlet 54, and thus also between liquid inlet 48 and outlet 22. If the user releases the operating body 72 again, it is pivoted back into the rest position by the first return spring 90, in which the closing body 60 assumes its closed position as explained above, whereby the fluid connection between the fluid inlet 48 and the fluid outlet 22 is interrupted.

When the actuating body 72 is in the release position, the liquid which can flow out of the gun housing 12 through the liquid outlet 22 exerts a recoil force on the gun housing 12, with the result that the valve gun 10 is pressed against the user's thenar against the actuating surface 82 of the actuating body 72. This makes the operation of the valve gun 10 easier because the finger burden on the user is reduced.

In fig. 3 and 4, a second and a third advantageous embodiment of the valve gun according to the invention are schematically shown. These embodiments are constructed substantially the same as the first embodiment described above with reference to fig. 1 and 2. Accordingly, the same reference numerals as in fig. 1 and 2 have been used in fig. 3 and 4 for the same components, and to avoid repetition, reference is made to the above explanations for these components.

An advantageous second embodiment of a valve gun according to the invention, shown in fig. 3, is generally indicated by reference numeral 120. It differs from the valve gun 10 shown in fig. 1 and 2 in that the gun housing 12 does not have a retaining bow 34. Thus, the inflow line 44 of valve gun 10 is absent from valve gun 120. In the valve gun 120, the valve inlet 42 is integrally connected to the inlet bushing 46 constituting the liquid inlet 48. The inlet bushing 46 projects outwardly from a retaining nozzle 124 of the gun housing 12 of the valve gun 120, which retaining nozzle is molded on the bottom side 122 of the elongate housing region 18.

A further difference from valve gun 10 is that actuating mechanism 70 of valve gun 120 has an actuating body 125 with an actuating arm 127 and a force transmission arm 126, force transmission arm 126 being connected in one piece to a force application element 128.

Even in the valve gun 120, the user can operate the actuating mechanism 70 by his fish, wherein the force application element 128 rests loosely on the valve tappet 68 and the valve tappet 68 can be displaced by pivoting the actuating mechanism 70 about the first pivot axis 88, so that the valve 38 is opened.

A third embodiment of a valve gun according to the present invention, shown schematically in fig. 4, is indicated generally by the reference numeral 140. It differs from the valve gun 10 shown in fig. 1 and 2 in that it has a liquid inlet 142 arranged on the lower end region 32 of the handle 28. The fluid inlet 142 is connected in flow communication via a feed line 144 to a valve inlet 146 of a valve housing 148, which is arranged in the upper end region 30 of the handle 28 and has a drain line 152 connected to its valve outlet 150, via which drain line the valve outlet 150 is connected in flow communication with a fluid outlet 154 of the valve gun 140. In line with the liquid outlet 22 of the valve gun 10, the liquid outlet 154 of the valve gun 140 is also disposed on the front side 20 of the gun housing 12. The drain line 152 is connected in the illustrated embodiment integrally with the valve housing 148. As an alternative, the drain line can also be designed as a separate component which is connected in a fluid-tight manner to the valve housing 148. An outlet bushing can be coupled as a separate component to the end of the drain line 152 facing away from the valve housing 148.

The actuating mechanism 70 of the valve gun 140 has an actuating body 158 and a force application element 160 which is fastened to this actuating body 158. The actuating body 158 is L-shaped and has an actuating arm 162 and a force transmission arm 164. The actuating arm 162 has an actuating surface 166 that projects outward on the rear side 84 of the handle 28 and is rigidly and integrally connected to the force transmission arm 164. The operating arm 162 extends from the lower end region 32 of the handle 28 to the upper end region 30 of the handle 28. The force transmission arm 164 is coupled to the actuating arm 162 in the upper end region 30, but wherein the force transmission arm is significantly shorter than the actuating arm 162. The force transmission arm 164 is mounted pivotably about a first pivot axis 168 on the valve housing 148 with its free end facing away from the actuating arm 162.

The handle 28 of the valve gun 140 can also be grasped by the hand of the user, in which case he can rest his thenar against the operating face 166 of the operating body 158 in order to pivot it from the rest position shown in fig. 4 about the first pivot axis 168 into the release position. In this pivoting, an operating force is applied by the force application element 160 to the valve tappet 68 of the valve gun 140, so that the valve tappet 68 is pushed and in this case the closing body 60 of the valve gun 140 is moved from its closed position into its open position, as has already been explained in detail above with reference to the valve gun 10.

Valve guns

10, 120 and 140 are characterized by a simple constructional design and can be operated by the user in a simple manner and with little effort in practice.

Claims

1. A valve gun for a high pressure cleaner for controlled discharge of cleaning liquid, the valve gun having a gun housing (12) with a handle (28); and having a valve (38) which is arranged in the gun housing (12) in the flow path between the liquid inlet (48, 142) and the liquid outlet (22, 154), said valve having a closing body (60) which in the closed position bears in a fluid-tight manner against a valve seat (58) and can be moved into the open position by displacement of a valve tappet (68); and having an operating mechanism (70) which can be moved manually for displacing the valve tappet (68), wherein the liquid outlet (22, 154) is arranged on a front side (20) of the gun housing (12), and the operating mechanism (70) has an operating surface (82, 166) which is arranged on a rear side (84) of the handle (28) facing away from the liquid outlet (22, 154), characterized in that the operating mechanism (70) has a force application element (74, 128, 160) which can bear against the valve tappet (68), the operating mechanism (70) has an operating body (72, 125, 158) with an operating surface (82, 166), wherein the operating surface (82, 166) projects out of the rear side (84) of the handle (28) when the operating body (72, 125, 158) is in a rest position, and the operating body (72, 125, 158) can be moved by a user to a release position by means of a fish, and wherein the force application element (74, 128, 160) is arranged on the operating body (72, 125, 158),

the operating body (72, 125, 158) can be pivoted back and forth about a first pivot axis (88, 168) between a rest position and a release position,

the actuating body (72, 125, 158) has an actuating arm (76, 127, 162) and a force transmission arm (78, 126, 164), wherein the actuating arm (76, 127, 162) has an actuating surface (82, 166), and wherein the force transmission arm (78, 126, 164) is rigidly connected to the actuating arm (76, 127, 162) and is mounted pivotably about a first pivot axis (88, 168) on an end region of the force transmission arm facing away from the actuating arm (76, 127, 162),

the actuating arm (76, 127, 162) is arranged at least in some regions in the handle (28), and the force transmission arm (78, 126, 164) is arranged at least in some regions in the gun housing (12) outside the handle (28).

2. Valve gun according to claim 1, characterized in that the force application element (128) is integrally connected with the operating body (125).

3. Valve gun according to claim 1, characterized in that the force application element (74, 160) constitutes a separate constructional element which is held on the operating body (72, 158).

4. Valve gun according to claim 1, characterized in that the force application element (74) is adjustably held on the operating body (72).

5. The valve gun according to claim 1, wherein the first pivot axis (88, 168) is arranged adjacent to a valve tappet (68).

6. The valve gun according to claim 1, wherein the first pivot axis (88, 168) is arranged between the liquid outlet (22, 154) and the force application element (74, 128, 160).

7. The valve gun according to claim 1, wherein the force transmitting arm (164) is shorter than the operating arm (162).

8. Valve gun according to claim 1, characterized in that the force transmission arm (78, 126, 164) is pivotably supported on the valve (38) about a first pivot axis (88, 168).

9. Valve gun according to claim 1, 2, 3, 4 or 5, characterized in that the valve (38) has a valve housing (40, 148) with a valve inlet (42, 146) which is in flow connection with a valve outlet (54, 150) via a through-channel (52), wherein the valve seat (58) and the closing body (60) are arranged in the through-channel (52) and the valve tappet (68) sealingly passes through a tappet channel (66) and sinks into the through-channel (52).

10. The valve gun of claim 9, wherein the liquid inlet (48, 142) is in flow connection with the valve inlet (42, 146) through an inlet line (44, 144).

11. Valve gun according to claim 10, characterized in that at least one section of the inflow line (44) is arranged in a retaining bow (34).

12. The valve gun according to claim 10, wherein at least one section of the inflow line (144) is arranged in a handle (28).

13. The valve gun according to claim 9, characterized in that the valve outlet (150) is in flow connection with a liquid outlet (154) via a drainage line (152).

14. The valve gun according to claim 13, characterized in that the drain line (152) is connected integrally with a valve housing (148).

15. The valve gun according to claim 13, characterized in that at least one section of the drain line (152) is arranged in the gun housing (12) outside the handle (28).

16. Valve gun according to claim 1, 2, 3, 4 or 5, characterized in that the valve gun (10, 120, 140) has a locking mechanism (92) movable back and forth between a locked position and an unlocked position for locking the operating mechanism (70).

17. Valve gun according to claim 16, characterized in that the locking mechanism (92) is arranged on a front side (98) of the handle (28) facing the liquid outlet (22, 154).

18. Valve gun according to claim 16, characterized in that the locking mechanism (92) is pivotably supported about a pivot axis (94) assigned to the locking mechanism (92).

19. The valve gun according to claim 18, characterized in that the pivot axis (94) assigned to the locking mechanism (92) is arranged in an upper end region (30) of the handle (28) or in a region of the gun housing (12) adjacent to the upper end region of the handle (28).

20. The valve gun according to claim 16, wherein the locking mechanism (92) has an operating arm (96) and a locking arm (100), wherein the operating arm (96) projects outwardly from a front side (98) of the handle (28) facing the liquid outlet (22, 154) when the locking mechanism (92) is in the locked position, and wherein the locking arm (100) blocks movement of the operating mechanism (70) when the locking mechanism (92) is in the locked position.

21. Valve gun according to claim 16, characterized in that the valve gun (10, 120, 140) has a return spring (104) assigned to the locking mechanism (92), which spring exerts a return force on the locking mechanism (92) in the direction of the locking position.