Coating spray gun with operating trigger made of plastic

Abstract

The invention relates to a coating spray gun having an operating trigger made of plastic, said operating trigger having simpler operability and improved cleaning properties.

Description

Technical Field

[0001] The invention relates to a paint spray gun having an operating trigger made of plastic, which has simpler operability and improved cleaning properties. Background Art

[0002] A painting spray gun is used to atomize a flowable material and apply it to a surface. The material to be applied can be in liquid or powder form. Since a painting spray gun is usually reused after applying the flowable material, cleaning the painting spray gun is of particular importance. For this purpose, it is meaningful to be able to access the relevant positions of the painting spray gun that come into contact with the material to be applied for cleaning. In particular, in the case of paints, but also in other materials to be applied, there is often the problem that these materials must be removed from the painting spray gun with the aid of solvents. For this reason, the painting spray gun must also be resistant to these solvents. However, since the solvent may affect the material to be applied, the used solvent must usually be removed from the painting spray gun before it can be used again to apply the flowable material. Therefore, when cleaning the painting spray gun, how to effectively remove the solvent from the painting spray gun is also of great significance. Summary of the Invention

[0003] According to the invention, a painting spray gun is provided according to the independent claim 1 , wherein developments thereof are defined in the dependent claims.

[0004] According to an embodiment, a painting spray gun is provided, which includes a painting spray gun body and an operating trigger, wherein the operating trigger has an operating trigger body with a finger support for triggering a spraying process, wherein the painting spray gun body has a section for fixing the operating trigger, which section is made of metal, wherein the operating trigger is movably fixed to the painting spray gun body and the operating trigger body is made of plastic.

[0005] In this way, a painting spray gun with simpler operation and improved cleaning properties can be provided. The component of the painting spray gun is understood to be the painting spray gun body, in which or on which the functional components of the painting spray gun are installed and mounted and which is usually the load-bearing main component of the painting spray gun. The painting spray gun body is delimited with its surface relative to the surrounding environment, so that the outer surface of the painting spray gun body presents a touch surface to the user. As an operating trigger, it can be understood to be a usually movable part of the painting spray gun, which is used to operate the painting spray gun and therefore for starting or dispensing the output of the material to be applied. The following part of the operating trigger can be understood as the operating trigger body, which usually represents the main component of the operating trigger that is shaped and load-bearing. The following section or surface of the operating trigger can be understood as a finger support, for the body part operated by the user, usually one or more fingers, to rest on this section or surface. Such a section of the painting spray gun or the painting spray gun body can be understood as a section for fixing the operating trigger on the painting spray gun or the painting spray gun body, on which the force applied to the operating trigger is transmitted to the painting spray gun or the painting spray gun body. This can be a single axis of rotation or multiple axes of rotation, for example, in the case of a trapezoidal suspension, in principle, each one-dimensional or multi-dimensional rotary bearing or transverse sliding bearing. Polymers are understood to be plastics, which can be manufactured, for example, based on crude oil or biomaterials (biopolymers). Plastics do not exclude that the body formed thereby cannot contain fillers that do not have a polymer structure, such as carbon powder or graphite powder or carbon fibers or graphite fibers, glass powder or fibers, mineral powder or fibers, etc. The section of the operating trigger made of plastic that is fixed to the paint spray gun body, which is made of metal, allows, on the one hand, a very dimensionally stable and reliable interaction of the paint spray gun and its components, as well as a very precisely fitting fastening of the operating trigger, while at the same time allowing, in particular, good cleaning properties for components that are frequently handled or touched by the user and are therefore also frequently contaminated with the material or paint to be applied.

[0006] According to an embodiment, the painting spray gun body is manufactured with a metal surface.

[0007] In this way, a paint spray gun can be provided which has a dimensionally stable surface and thus also an overall dimensionally stable structure, to which functional components of the paint spray gun can be fastened. This includes a paint spray gun body made entirely of metal.

[0008] According to an embodiment, the operating trigger is rotatably supported on the paint spray gun body around the rotation axis, and a finger support is constructed on the operating trigger body, which is arranged at a distance from the rotation axis and can generate a torque around the rotation axis by bending the finger through the distance to the finger support.

[0009] In this way, the operating trigger made of plastic makes it possible to produce a user interface adapted to the paint spray gun and the paint spray gun can be actuated in a controlled manner via the finger rest provided on the operating trigger.

[0010] According to an embodiment, the operating trigger body has a protrusion extending from a surface of the operating trigger body facing away from the finger support in a spacing region from the rotation axis including the finger support, and the finger support is configured in this spacing region, wherein the painting spray gun body has a protrusion stop surface, and the protrusion abuts against the protrusion stop surface when the operating trigger is fully operated.

[0011] In this way, the operating stroke of the operating trigger can be limited by a protrusion on the operating trigger, which, when fully operated, comes to rest on a stop surface for the protrusion provided on the body of the painting spray gun. The operating stroke of the operating trigger is understood to be the section that deflects the operating trigger and, when the air valve is opened, moves the air piston from the sealing seat in the direction opposite to the air nozzle until the end point. At the end point, the force in the region of the transition between the air piston and the operating trigger is limited, wherein the stop is, in particular, leverless, that is, when abutting, it is essentially orthogonal to the stop surface and also transmits the operating force orthogonally to this stop surface. When the air valve is closed, the air piston and the operating trigger move in opposite directions over the operating stroke.

[0012] According to an embodiment, the operating trigger body has a sail-shaped reinforcement structure, which extends between the surface of the operating trigger body facing away from the finger support portion and the protrusion in a direction perpendicular to the rotation axis, so that when the operating trigger is operated in a direction perpendicular to the rotation axis, the force acting from the protrusion stop surface of the coating spray gun body on the protrusion is diverted to the surface of the operating trigger body facing away from the finger support portion.

[0013] In this way, forces acting on the projection during trigger operation, which are exerted by the projection stop surface of the paint spray gun body and prevent the projection from bending or breaking, can be avoided. The sail-like reinforcement structure can transmit any non-orthogonal forces into the trigger body along the direction of the upper edge of the sail. The sail-like reinforcement structure can extend in different directions.

[0014] According to an embodiment, the sail-like reinforcement structure extends in two directions of projection orthogonal to the axis of rotation.

[0015] In this way, forces acting not directly orthogonally on the projection, in particular forces acting upward in the direction of the axis of rotation or downward away from the axis of rotation, can also be dissipated.

[0016] According to one embodiment, the surface of the operating trigger body facing away from the finger support is formed with a reinforcement structure. The reinforcement structure can be formed in particular as a honeycomb-shaped reinforcement structure.

[0017] In this way, an effective reinforcement structure that avoids or reduces the deformation of the operating trigger when operating can be provided. Here, the honeycomb reinforcement structure provides the good ratio of stability and material use.

[0018] According to an embodiment, the transition from the surface of the operating trigger body facing away from the finger support to the web of the reinforcing structure and the operating trigger body have a surface tension and are geometrically designed so that hexadecane with a surface tension of 27.6 mN / m drips off under gravity when the operating trigger body is oriented vertically.

[0019] In this way, it is possible to prevent droplets of typical cleaning agents or solvents, or those associated with hexadecane, from accumulating, in particular on the inside of the operating trigger, or to facilitate their detachment, so that they detach automatically or under the influence of a gas flow, such as compressed air. This also applies to other cleaning agents having a surface tension similar to that of hexadecane.

[0020] According to an embodiment, the transition from the surface of the actuating trigger body facing away from the finger support to the web of the reinforcing structure has a center angle surface which forms an angle of greater than 90°, in particular greater than 100°, with the surface facing away from the finger support.

[0021] This makes it possible to provide a reinforcement structure, particularly a honeycomb-shaped reinforcement structure, with improved cleaning properties. The larger the angle, the less risk of cleaning agent adhering to the folds in this corner. At the transition of a cell wall that stands essentially perpendicular to the cell base, the intermediate corner surface can be inclined on both sides at an angle of approximately 135° relative to the cell wall or the cell base. However, the cell wall can also taper conically upward toward the edge, so that an angle greater than 90°, measuring, for example, 100° or 110°, is already produced at the transition from the cell wall to the cell base.

[0022] According to one embodiment, the transition from the surface of the actuating trigger body facing away from the finger support to the web of the reinforcing structure has a concave surface with a radius greater than 1 mm, in particular greater than 2 mm.

[0023] This makes it possible to provide a reinforcement structure, particularly a honeycomb-shaped reinforcement structure, that has improved cleaning properties, especially if sharp-edged corner folds can be omitted. The individual cells of the honeycomb-shaped reinforcement structure can have flat demolding chamfers, which form a gradual transition from the cell wall to the cell base. This not only facilitates demolding from the injection mold, but also promotes the dripping of cleaning agents, ensuring that no solvent or cleaning agent droplets remain inside the handle or that these droplets are easily dislodged, for example, by air flow. The large radius facilitates cleaning.

[0024] According to an embodiment, a section of the actuating trigger body on its side facing away from the finger rest is concave and has a side wall in the region of the finger rest extending orthogonally to the rotation axis and having a greater wall thickness than side wall sections outside the finger rest.

[0025] In this way, deformation of the trigger body under force is minimized by the user while using less material. The trigger body has a substantially greater lever sidewall thickness to maintain the grip contour. This prevents bending or deformation of the trigger and reduces finger contact. Furthermore, the bending moment (plane moment of inertia) is reduced, enabling more precise operation of the paint spray gun. The user can activate the nozzle release movement based on the deflection of their finger.

[0026] According to an embodiment, the side wall extending orthogonally to the axis of rotation comprises a reinforcement web which extends on the concave side of the side wall substantially parallel to the projection.

[0027] In this way, the lateral side walls can be further reinforced and lateral contraction of the handle can be avoided. Thus, the operating trigger retains its longitudinal and transverse structure even when a large force is applied by the user, and its grip contour is retained by the lateral tabs. This prevents deformation and the consequent reduction in finger contact on the operating trigger, which is essential for accurate work.

[0028] According to an embodiment, the coating spray gun also has a feeding device that can be moved along an axis, and the feeding device has a feeding needle extending in the direction of paint output, wherein the rotation axis serves as a support for a lever arm composed of the operating trigger body of a one-sided lever, and the lever arm is loaded with a lever force in the area of ​​the finger support part, and the operating trigger body has a feeding device joint surface between the rotation axis and the finger support part, at which the movable feeding device is at least partially abutted against the joint point through the operating stroke of the operating trigger, and the feeding device slides along and can be moved along the axis when the operating trigger is operated, so that the joint point moves along the feeding device joint surface, wherein the feeding device joint surface is designed so that the tangent through the corresponding joint point is inclined relative to the extension direction of the lever arm and is located in the same plane as the tangent and the lever arm.

[0029] This allows the force-travel characteristics of the paint spray gun to be adjusted accordingly. By sliding the joint along the joint surface, the ratio of the lever arm between the rotation axis of the operating lever, the joint, and the finger support changes. The inclination of the joint surface relative to the lever extension at the point where the operating mechanism contacts the joint surface (i.e., a tangent through the joint) can be used to adjust the desired force relationship or force-travel characteristics.

[0030] According to an embodiment, a tangent between the engagement point and the axis of rotation is inclined in the dosing triggering direction.

[0031] In this way, an accelerated response of the actuating device can be achieved when the actuating trigger is actuated, since the actuating travel is increased due to the ramp-shaped position of the abutment surface.

[0032] According to an embodiment, the feeding device joint surface is divided in a direction perpendicular to the rotation axis and the feeding device rests on the divided joint surface on both sides and slides along the joint surface when operating the operating trigger, wherein the feeding needle extends through the divided joint surface in the direction of paint output.

[0033] In this way, an improved force distribution is achieved and the lateral forces on the feed needle are reduced. The needle is enclosed by the engaging surfaces on both sides of the operating trigger, wherein the projections rest on the engaging surfaces on both sides so as not to exert bending forces on the needle. The engaging surfaces have a characteristic geometry that enables the movement characteristics of the feed needle to be realized. It will be understood that the geometry of the engaging surfaces can be designed to be adapted to the movement profile of the feed needle as required. This can, for example, lead to a linearization of the feed needle movement or also to an over- or under-proportioned movement of the feed needle in a specific movement section.

[0034] According to an embodiment, the operating trigger body is made of fiber-reinforced plastic, in particular of fiber-reinforced polyamide, in particular of a glass-fiber-reinforced polyamide 6 and polyamide 6.6 composite, in particular of a glass-fiber-reinforced polyamide 6 and polyamide 6.6 composite with a volume fiber fraction of between 30% and 50%.

[0035] In this way, the toughness of the operating trigger can be further increased. Fiber reinforcement can alternatively or additionally also be achieved with other fiber types, such as carbon fibers or mineral fibers. The fibers can be introduced into the injection mold together with the liquid plastic during the injection molding process, or they can also be placed in the injection mold beforehand.

[0036] According to an embodiment, the operating trigger body has a stop extending in the coating material outlet direction, wherein in particular the stop at least partially concentrically surrounds a feed needle extending in the coating material outlet direction.

[0037] In this way, the feed needle is covered and protected from external influences in the area that does not extend in the body of the painting spray gun. Concentricity should be understood as meaning that the baffle at least partially surrounds the feed needle, wherein the feed needle can also be located eccentrically in the baffle surrounding the feed needle. This covering baffle is particularly used in single-axis guns. In this case, the baffle can also limit the forward movement of the operating lever to a movement carried out opposite to the operating direction and thus avoid or reduce the loading of the needle guide. In addition, if the user accidentally puts the gun in this position for hanging, the baffle covers the feed needle in the area of ​​the guide and protects it from loading.

[0038] According to an embodiment, at least one of the projection, the sail-shaped reinforcement structure, the reinforcement web and the stop is formed integrally with the operating trigger body material.

[0039] In this way, an efficient manufacturing process can be achieved and a secure connection of the structure is ensured. Integral material means that the projection, the reinforcement structure, the reinforcement web or the stop is connected to the base body of the trigger body in a material-locking manner, for example by being manufactured from the same material, injection-molded from one material in one injection-molding step and / or 2K injection-molded from two or more materials in one injection-molding step.

[0040] The aforementioned features, as well as features from different embodiments, can also be combined with one another, whereby synergistic interactions can be provided that go beyond the sum of the individual effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The invention is explained below with the aid of an exemplary embodiment, which is described with reference to the following figures:

[0042] Figure 1 A schematic side view of a painting spray gun according to an exemplary embodiment is shown.

[0043] Figure 2 Shown is a perspective view of an operating trigger for a painting spray gun according to an exemplary embodiment.

[0044] Figure 3 A perspective view shows a detail in the area of ​​the fastening of an operating trigger for a paint spray gun according to an exemplary embodiment.

[0045] Figure 4 A perspective view showing further details of an operating trigger for a painting spray gun according to an exemplary embodiment.

[0046] Figure 5 A schematic side view of an operating trigger on a paint spray gun according to an exemplary embodiment is shown.

[0047] Figure 6 The change in the operating behavior in the edge regions “non-operated lever” and “(fully) operated lever” is shown.

[0048] Below, exemplary embodiments are described and explained with reference to the above-listed drawings. In this case, the same reference numerals or similar reference numeral structures represent similar or interacting components. DETAILED DESCRIPTION

[0049] Figure 1A schematic side view of a coating spray gun 100 according to an exemplary embodiment is shown. The coating spray gun 100 has a coating spray gun body 10, and all functional components of the coating spray gun are fixed at or in the coating spray gun body. The coating spray gun 100 has an air supply 91, which can also be a compressed air supply 91 depending on the type of coating spray gun. In addition, the coating spray gun 100 has a material or paint supply 92, via which the material to be applied is supplied. It should be understood that, depending on the structural principle and application field of the coating spray gun, material supply can also be carried out at other positions. The embodiment shown here also has an air supply adjustment part or a so-called pneumatic micrometer 81 for adjusting or distributing the amount of air supplied. In addition, the embodiment shown here has a material quantity adjustment part 82, which can, in principle, be used to distribute, set or limit the amount of material supplied. The embodiment shown here also has a so-called air cover 95, which is used to supply and design an air flow for material jet forming. The spray jet emerging from the material nozzle or paint nozzle 96 can be shaped in various ways via the circular or wide spray adjustment 83. The output quantity can be metered by the user during material application via the operating trigger 30, which is rotatably mounted on the paint spray gun body 10 about the axis of rotation 20. By operating the operating trigger 30 in the dosing trigger direction D, the movable dosing device 60 is deflected within the paint spray gun body 10 along its axis of motion B, and the dosing needle 70 is released from its seat in the material nozzle or paint nozzle 96, so that the material to be applied is discharged from the material nozzle or paint nozzle 96 in the direction of the paint delivery direction L. The operating trigger 30 has a projection 43 that can be integrally connected to the operating trigger body 40 and limits the movement of the operating trigger 30 in the direction of the paint spray gun body 10. This limitation can be achieved by providing a stop surface 13 on the coating spray gun body 10, at which the protrusion 43 stops when the operating trigger 30 is at its maximum deflection. In the embodiment shown here, the operating trigger 30 can have a baffle or a feed needle covering baffle 50 that can also be constructed integrally with the operating trigger body 40. It should be understood that the baffle 50 can also be provided as an independent component, for example, so as to retrofit a coating spray gun with such a baffle. Here, the coating spray gun body 10 can have a baffle engagement surface 15, at which the baffle can abut against the coating spray gun body 10 when the operating trigger moves against the feed trigger direction D, so as to limit movement in this direction. However, it should be understood that movement limitation can also be carried out at other positions, where the structure of the operating trigger 30 abuts against the coating spray gun body 10 for movement limitation (not shown here).

[0050] Figure 2A stereoscopic view of an operating trigger 30 for a painting spray gun 100 according to an exemplary embodiment is shown. The operating trigger 30 is supported on the painting spray gun body 10 in such a way that it can be rotated and deflected relative to the painting spray gun body 10 about the axis of rotation 20. It should be understood that the operating trigger 30 can also have other suspension parts on the painting spray gun body 10 that allow deflection, such as a trapezoidal support. The operating trigger 30 has an operating trigger body 40, which has a finger support 41, on which the user can place his finger to dispense the operating stroke. A protrusion 43 is provided on the side 42 of the operating trigger body 40 facing away from the finger support 41, which can limit the deflection of the operating trigger 30 relative to the painting spray gun body 10 by a stop on the stop surface 13 on the painting spray gun body 10. The projection 43 can be supported by a sail-like reinforcement structure 44 to prevent it from breaking or bending when it abuts the stop surface 13. The sail-like reinforcement structure 44 of the projection 43 can extend in two directions: upward in the direction of the rotation axis 20 and / or downward away from the rotation axis 20. To provide dimensional stability, the operating trigger body 40 can include a reinforcement structure 45, which can be, for example, honeycomb-shaped. Alternatively, other structures, such as square, rectangular, or diamond-shaped, can also be used. Furthermore, the operating trigger 30 includes a side wall 46 that extends from the finger support 41 toward a side 42 facing away from the finger support 41 and enhances the dimensional stability of the operating trigger 30, preventing it from bending or losing its geometric shape during actuation. The side wall 46 can also be provided with a reinforcement tab 47 on the inner side of the side 42 facing away from the finger support 41 to prevent the operating trigger 30 from flexing inward. Here, the side wall 46 can be provided with a thickening 46a in the section of the finger support 41 or with a greater wall thickness than in sections outside the finger support 41, which further increases the dimensional stability of the operating trigger 30. In the embodiment shown here, the operating trigger 30 has a feeder engagement surface 48, against which the feeder 60 rests and which is deflected along the axis B when the operating trigger 30 is actuated. The engagement surface 48 shown here surrounds a feeder needle (not shown here) coupled to the feeder 60 and allows it to pass through. The operating trigger 30 also has a stop 50, which covers the feeder needle, particularly in the area where it extends outside the paint spray gun body.

[0051] Figure 3A three-dimensional view of a detail of the operating trigger 30 in the area of ​​the fastening of the operating trigger 30 for the coating spray gun 100 according to an exemplary embodiment is shown. The fastening bracket 30 is supported on the coating spray gun body 10 so as to be rotatable around the axis of rotation 20. The operating trigger 30 has an engagement surface 48 configured on its operating trigger body 40, against which the feeding device 60 abuts. The feeding needle 70 is coupled to the feeding device and extends in the air cover 95 in the direction of the material nozzle 96 in the paint output direction L. The feeding device 60 can be moved by deflecting the operating trigger along the movement axis B of the feeding device 60. For this purpose, the feeding device 60 has a corresponding engagement surface, which abuts the engagement surface 48 of the operating trigger 30. Because the operating trigger 30 rotates around the axis of rotation 20, the engagement point of the engagement surface 48 changes, at which the engagement surface of the feeding device 60 abuts. When the operating trigger 30 is operated, the contact point slides along the engagement surface 48. Depending on how the engagement surface is inclined or curved, the characteristics of the operating stroke of the operating trigger 30 relative to the movement section of the feeding device 60 can be set. It should be understood that the characteristics can also be determined by the shape of the engagement surface on the feeding device side. The feeding needle 70 can be coupled to the feeding device 60 and pass through the opening of the engagement surface 48. The engagement surface 48 at the operating trigger 30 can have two dividing surfaces 48a, 48b extending laterally of the feeding needle. Here, the dividing surfaces 48a, 48b can also be connected to each other in a U-shaped manner, as shown here. The dividing surfaces allow abutment on both sides of the feeding needle 70, so that no bending force is applied to the feeding needle 70, or the bending force is significantly reduced.

[0052] Figure 4A perspective view shows further details of the operating trigger 30 for a paint spray gun in the area of ​​the finger support 41 according to an exemplary embodiment. The operating trigger 30 has an operating trigger body 40, which has a finger support 41 facing the paint delivery direction L, on which the user can place their finger to dispense the operating stroke. The finger support can be structured on the surface to provide a better grip for the user's fingers. However, this structure must meet cleaning requirements and the required dripping behavior of the cleaning agent. A protrusion 43 is provided on the side 42 of the operating trigger body 40 facing away from the finger support 41. This protrusion can limit the deflection of the operating trigger 30 relative to the paint spray gun body 10 by stopping at the stop surface 13 on the paint spray gun body. Here, the protrusion 43 can be supported by a reinforcing structure 44 in the form of a sail to prevent the protrusion from breaking or bending when it stops at the stop surface 13. The sail-like reinforcement structure 44 of the projection 43 can be divided into two or more parts, with, for example, a first sail-like reinforcement structure 44a extending upward in the direction of the rotation axis 20, while a second sail-like reinforcement structure 44b extends downward from the rotation axis 20. For example, if lateral forces are expected, additional sail-like reinforcement structures can be provided to dissipate these lateral forces laterally. To achieve dimensional stability, the trigger body 40 can include a reinforcement structure 45, which can be, for example, honeycomb-shaped. The honeycomb-shaped reinforcement structure 45, for example, includes webs 45a, 45b that transition into the honeycomb base. The transition can have an angle greater than 90°, approximately 100°, or even greater. These webs can extend upward in a conical manner, away from the honeycomb base. The honeycomb-shaped reinforcement structure 45 can also include intermediate corner surfaces 45c, which are a type of chamfer between the webs 45a, 45b and the honeycomb base, thereby providing a smoother transition from the webs to the honeycomb base. The angle between the webs 45a, 45b and the central angled surface 45c, or the angle between the central angled surface 45c and the honeycomb base, is, for example, greater than 120°, for example, approximately 135° in both transitions. The transition from the webs 45a, 45b to the honeycomb base can also be designed with a radius greater than 1 mm, for example, 2 mm. This prevents the cleaning agent from adhering or allows for better removal. This geometrical measure can be combined with a design for the surface tension of the material or the operating trigger 30 to ensure that the cleaning agent, such as hexadecane, drips naturally due to gravity or is assisted by an air flow.

[0053] The operating trigger 30 also has a side wall 46 that extends from the finger support 41 toward a side 42 facing away from the finger support 41 and increases the dimensional stability of the operating trigger 30, preventing it from bending or losing its geometric shape during actuation. The side wall can have a thickening 46a in a lateral section at the level of the finger support 41 or a greater wall thickness than in other sections of the operating trigger, thereby achieving greater dimensional stability in the bending direction in the region of the finger support 41 in the feeding direction D. The side wall 46 can also be provided with reinforcement webs 47a, 47b on the inner side of the side 42 facing away from the finger support 41, which prevent the operating trigger 30 from flexing inwards. These webs 47a, 47b can be formed as a continuation of the honeycomb-shaped reinforcement 45 and continue into the honeycomb webs 45a, 45b.

[0054] Figure 5 A schematic side view of the operating trigger 30 at the painting spray gun 100 according to an exemplary embodiment is shown. Figures 1 to 4 , which is similarly applicable here. In the embodiment shown here, the operating trigger 30 has a baffle or a feed needle covering baffle 50. The baffle covers the section of the feed needle 70 that is open at this position. Thus, for example, when the user hangs the painting spray gun 100 at this position and the support point hits the vulnerable part of the feed needle 70, the movable feed needle 70 is protected from mechanical influences. The painting spray gun body 10 can have a baffle joint surface 15, and when the operating trigger 30 moves against the feed trigger direction D, that is, in the direction of the paint output direction L, the baffle 50 can abut against the painting spray gun body 10 at the baffle joint surface to limit the movement in this direction. The baffle 50 can be integrally or integrally formed with the material at the operating trigger body 40. However, the baffle 50 can also be provided as a separate element, which can be fixed to the operating trigger, for example, by a clamping mechanism.

[0055] Figure 6 The system operation method showing the change of the operating characteristics in the edge area "non-operated lever" and "(fully) operated lever" is combined with the above features and can be regarded as the present invention independently. The operating lever 30 is a one-sided lever arm I H The lever arm has a rotation axis 20 as a support. The force introduction is achieved via the finger support surface or finger support point 41, the operating force F K The force is taken out at the joint point A, where the feeder 60 rests against the feeder engagement surface 48. His divided into a load arm I located between the rotation axis 20 and the joint A L and the lever arm I between the joint A and the finger support point 41 K . As from Figure 2 As can be seen in the figure, the lever arm I K The length of the load arm is significantly greater than L Length. Especially the load arm I L The length and lever arm I K The ratio between the lengths of the finger engagement surface 41 is less than 1:5, in particular less than 1:7. When a force is applied to the finger engagement surface 41, the operating trigger 30 is deflected in the direction of the dosing trigger direction D and rotated about the rotation axis 20. In this case, the dosing device 60 is deflected along the movement axis B of the dosing device 60. In this case, due to the lever arm I H Due to the circular segment movement and the linear movement of the feeding device 60, the joining point A between the feeding device 60 and the feeding device joining surface 48 moves along the movement axis B of the feeding device 60, which is the longitudinal extension axis here.

[0056] The feed device engagement surface 48 at the operating trigger 30 has a tangent that is inclined between the engagement point A and the axis of rotation 20 in the feed triggering direction. K The extension direction of the lever arm and the tangent line is essentially in one plane. This results in a triggering characteristic that is different from the triggering characteristic of the lever arm. H In the case of a flat feeder engagement surface 48, the inclination of the tangent line T is constant. However, in this case, when the operating trigger 30 is rotated about the rotation axis 20, the adjustment angle between the operating axis B and the feeder engagement surface 48 changes. In the case of a convex curvature, the inclination of the tangent line T in the direction of the rotation axis 20 increases. In the case of a concave curvature, the inclination of the tangent line T in the direction of the rotation axis 20 decreases. This makes it possible to set the trigger characteristic or the feed characteristic and adapt it to the respective application as required, for example, in order to reduce or, as required, intensify the effect of the changing adjustment angle between the lever arm and the operating axis B. There is also the possibility of replacing the operating trigger 30 and replacing it with an operating trigger 30 with other trigger characteristics or feed characteristics.

[0057] Due to the angular position of the movement axis B of the feeder relative to the rotation axis 20 of the operating trigger, when the operating trigger 30 is operated, a movement of the joint point A along the feeder joint surface 48 occurs. Due to this movement of the joint point A along the feeder joint surface 48, the load arm 1 L The length of the load arm I becomes shorter in the operating stroke along the feeding trigger direction D. L The length change causes the operating force F KThe trigger force F acting on the feeding device 60 is kept constant. L The increase in the operating stroke along the feeding trigger direction D. The feeding device engagement surface 48 is inclined to the force arm I K The feeding device 60 is present in such a manner that the point at which the feeding device 60 abuts against the feeding device engagement surface 48 is in the following manner with the lever arm 1 when the operating trigger 30 is fully operated. K Spaced apart, that is, the operating stroke of the feeding device 60 is greater than the force arm I K The lever arm I at the same height K operating stroke.

[0058] To reduce or eliminate the effect of the trigger force F1 that decreases over this operating stroke, the feeder engagement surface 48 can be convexly curved, thereby maintaining a constant force component acting perpendicular to the tangent line T in the feeder trigger direction D. Therefore, in one design, the feeder engagement surface 48 is convexly curved in the region of the junction A, where the feeder 60 abuts the feeder engagement surface 48 when the operating trigger 30 is not actuated. The convex curvature of the feeder engagement surface 48 can be flattened toward the junction A (where the feeder 60 abuts the feeder engagement surface 48 when the operating trigger is actuated) such that the radius of curvature of the convex curvature approaches zero. In this design, the dividing surfaces 48a and 48b of the feeder engagement surface 48 can be designed so that they form an egg-shaped indentation in the operating trigger 30. It will be appreciated that the feeder engagement surface 48 can also have different geometric shapes. For example, convex and concave sections can alternate, or flat or ramp-shaped dividing surfaces can be provided.

[0059] Reference Signs List

[0060] 10Painting spray gun body

[0061] 13 Stop surface for the protrusion of the operating trigger

[0062] 15 baffle joint surface

[0063] 20 Axis of rotation of the trigger

[0064] 30 Operation trigger

[0065] 40 Operation trigger body

[0066] 41 Finger support for operating the trigger body

[0067] 42 Operating the trigger body away from the finger support surface

[0068] 43 Operating the protrusion of the trigger body

[0069] 44 Sail-shaped reinforcement structure of the protrusion

[0070] Sail-shaped reinforcement structure of the protruding portion 44a, 44b

[0071] 45 operating trigger body (honeycomb) reinforcement structure

[0072] 45a, 45b (honeycomb-shaped) reinforcement structure tabs

[0073] 45c reinforced structure and the middle angle surface between the trigger body

[0074] 46 operating the side wall of the trigger body

[0075] 46a Thickening of the side wall, greater wall thickness of the side wall

[0076] 47 Side wall reinforcement tabs

[0077] 47a, 47b side wall reinforcement tabs

[0078] 48 Feeding device joint surface

[0079] 48a, 48b Partial surface or sliding surface of the feeding device joint surface

[0080] 50 Operating the baffle of the trigger body or the feeding needle covering baffle

[0081] 60 movable feeding device

[0082] 70 feeding needle

[0083] 81 Air supply regulation unit, pneumatic micrometer

[0084] 82 Material Quantity Adjustment Department

[0085] 83 (round-wide) beam adjustment unit

[0086] 91 (pressure) air supply department

[0087] 92 Material or coating supply department

[0088] 95 air cover

[0089] 96 material nozzle or paint nozzle

[0090] 100 painting spray guns

[0091] AThe joint point of the feeder on the feeder joint surface

[0092] B. The axis of motion of the feeding device

[0093] D Feeding trigger direction

[0094] F k Leverage

[0095] FL Trigger force

[0096] I H lever arm

[0097] I L Load arm

[0098] I K Lever arm.

Claims

1. A coating spray gun (100), comprising: Painting spray gun body (10), an operating trigger (30) having an operating trigger body (40) with a finger support (41) for triggering the spraying process, The coating spray gun body (10) has a section for fixing the operating trigger (30), and the section is made of metal; The operating trigger (30) is movably fixed to the paint spray gun body (10), and the operating trigger body (40) is made of plastic.

2. The coating spray gun (100) according to claim 1, wherein: The painting spray gun body (10) is manufactured to have a metal surface.

3. The coating spray gun according to any one of claims 1 and 2, wherein: The operating trigger (30) is supported on the coating spray gun body (10) so as to be rotatable around the rotation axis (20), and the finger support portion (41) is constructed on the operating trigger body (40), the finger support portion is arranged at a distance from the rotation axis (20) and can generate a torque around the rotation axis (20) by bending the finger onto the finger support portion (41) through the distance, wherein the operating trigger body (40) has a protrusion (43) extending from a surface (42) of the operating trigger body (40) facing away from the finger support portion (41) in a distance area from the rotation axis (20) including the finger support portion (41), wherein the coating spray gun body (10) has a protrusion stop surface (13), and the protrusion (43) abuts against the protrusion stop surface when the operating trigger (30) is operated to the maximum.

4. The coating spray gun according to claim 3, wherein: The operating trigger body (30) has a sail-shaped reinforcement structure (44, 44a, 44b), and the reinforcement structure extends between the surface (42) of the operating trigger body (30) facing away from the finger support part (41) and the protrusion (43) in a direction perpendicular to the rotation axis (20), so that when the operating trigger (30) is operated, the force acting on the protrusion (43) from the protrusion stop surface (13) of the coating spray gun body (10) in a direction perpendicular to the rotation axis (20) is directed to the surface (42) of the operating trigger body (30) facing away from the finger support part (41).

5. The coating spray gun according to claim 4, wherein: The sail-shaped reinforcement structure (44a, 44b) extends in two directions of the protrusion (43) orthogonal to the rotation axis (20).

6. The coating spray gun according to any one of claims 1 to 5, wherein: The surface (42) of the operating trigger body (40) facing away from the finger support (41) is formed with a reinforcement structure (45), in particular a honeycomb-shaped reinforcement structure (45).

7. The coating spray gun according to claim 6, wherein: The transition from the surface (42) of the operating trigger body (40) facing away from the finger support (41) to the webs (45, 45a, 45b) of the reinforcement structure (45) and the operating trigger body (40) have surface stress and are geometrically designed so that hexadecane with a surface stress of 27.6 mN / m drips down by itself under gravity when the operating trigger body (40) is oriented vertically.

8. The coating spray gun according to any one of claims 6 and 7, wherein: The transition from the surface (42) of the operating trigger body (40) facing away from the finger support (41) to the web (45, 45a, 45b) of the reinforcement structure (45) has an intermediate angle surface (45c), which forms an angle greater than 90°, in particular greater than 100° with the surface (42) facing away from the finger support (41), and / or the transition from the surface (42) of the operating trigger body (40) facing away from the finger support (41) to the web (45, 45a, 45b) of the reinforcement structure (45) has a concave surface with a radius greater than 1 mm, in particular greater than 2 mm.

9. The coating spray gun according to any one of claims 1 to 8, wherein: A section of the operating trigger body (40) on a surface (42) of the operating trigger body (40) facing away from the finger support (41) is concave and has a side wall (46) in the region of the finger support (41) extending orthogonally to the axis of rotation (20), said side wall having a greater wall thickness than side wall sections outside the finger support (41).

10. The coating spray gun according to claim 9, wherein: The side wall (46) extending orthogonally to the rotation axis (20) has reinforcement webs (47, 47a, 47b) which extend substantially parallel to the projection (43) on the concave side of the side wall (46).

11. The coating spray gun according to any one of claims 1 to 10, further comprising a feeding device (60) movable along an axis (B), the feeding device comprising a feeding needle (70) extending in a coating output direction, wherein: The rotation axis (20) serves as a lever arm (I) of a one-sided lever formed by the operating trigger body (40). L ) of the support, the lever arm is loaded with a lever force (F) in the region of the finger support (41). K ), and the operating trigger body (40) has a feeding device joint surface (48) between the rotation axis (20) and the finger support (41), at which the movable feeding device (60) at least partially abuts against the joint point (A) through the operating stroke of the operating trigger (30), and the feeding device slides along and can move along the axis (B) when the operating trigger (30) is operated, so that the joint point (A) moves along the feeding device joint surface (48), wherein the feeding device joint surface (48) is designed so that a tangent through the corresponding joint point (A) is relative to the lever arm (I H ) is inclined in its extension direction and the tangent is located in a plane with the lever arm.

12. The coating spray gun according to claims 1 to 11, wherein: The operating trigger (30) is supported on the coating spray gun body (10) so as to be rotatable about a rotation axis (20), and a feeding device joint surface (48) is provided for abutting against a movable feeding device (60), wherein the feeding device at least partially abuts against a joint point (A) through an operating stroke of the operating trigger (30), wherein a tangent between the joint point (A) and the rotation axis (20) is inclined along a feeding triggering direction (D).

13. The coating spray gun according to any one of claims 1 to 12, wherein: The feeding device joint surface (48) is divided in a direction orthogonal to the rotation axis (20) and the feeding device (60) abuts against the divided joint surface (48a, 48b) on both sides, and the feeding device slides along the divided joint surface when the operating trigger (30) is operated, wherein the feeding needle (70) extends through the divided joint surface (48a, 48b) in the direction of paint output.

14. The coating spray gun according to any one of claims 1 to 13, wherein: The operating trigger body (40) is made of fiber-reinforced plastic, in particular of fiber-reinforced polyamide, in particular of a glass-fiber-reinforced polyamide 6 and polyamide 6.6 composite, in particular of a glass-fiber-reinforced polyamide 6 and polyamide 6.6 composite with a volume fiber fraction of between 30% and 50%.

15. The coating spray gun according to any one of claims 1 to 14, wherein: The operating trigger body (40) has a baffle (50) extending in the coating material discharge direction, wherein in particular, the baffle at least partially concentrically surrounds a feed needle (65) extending in the coating material discharge direction.

16. The coating spray gun according to any one of claims 1 to 15, wherein: At least one of the projection (43), the sail-shaped reinforcement structure (44, 44a, 44b), the reinforcement web (47a, 47b) and the baffle (50) is constructed integrally with the operating trigger body (40).

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