Manually actuated paint spraying apparatus and method for operating a manually actuated paint spraying apparatus

Abstract

The invention relates to a paint spraying apparatus (1) which operates in an airless mode, comprising: a housing (2), a spray nozzle (3), a paint supply line (4a), a paint passage device (5) and a trigger (6), wherein the paint passage device (5) is arranged between the paint supply line (4a) and the spray nozzle (3). The paint spraying apparatus (1) comprises a detection device (7) and a controller (8). The detection device (7) detects a degree of actuation (6-0 to 6-9) of the trigger (6) and reports the degree of actuation to the controller (8). On the basis of the detected degree of actuation (6-0 to 6-9) of the trigger (6), the controller (8) conducts to the paint passage device (5), from among a plurality of different signals (S6-X), a signal (S6-X) associated with the degree of actuation (6-0 to 6-9), for alternate opening and closing of the paint passage device (5), such that a paint amount (FM) flowing through the paint passage device (5) corresponds to the particular degree of actuation (6-0 to 6-9).

Description

[0001] Patent application Applicant: J. Wagner GmbH Date: August 13, 2025 Our reference: W 2375-PC / DR

[0002] - 1 -

[0003] "Hand-operated paint spraying device and method for operating a hand-operated paint spraying device"

[0004] The invention relates to a hand-operated paint spraying device and a method for operating a hand-operated paint spraying device according to claims 1 and 7 respectively.

[0005] From DE 42 32 439 Al a spray gun for the airless spraying of paints or similar media under high pressure is known, which consists of a gun body equipped with an atomizing nozzle and connectable to a delivery line, a shut-off valve arranged in this and which can be opened by means of an actuating lever pivotably attached to the gun body and a handle provided on the gun body.

[0006] From US patent 2021 / 0154691, a hand-held sprayer is known which comprises a fluid module mounted on a static and a dynamic connection of a drive module. The liquid-contacting components of the hand-held sprayer are located in the fluid module. The fluid module can be mounted and dismounted from the drive module by a sliding motion.

[0007] From US 2022 / 0239241 A1, a fluid spraying device is known in which pressurized fluid is supplied to a nozzle by a pump, wherein a DC electric motor of the pump is driven by a motor controller with a high-speed pulse-width modulated signal which switches a current flowing through the motor on and off, wherein the motor controller is configured to modulate a duty cycle of the PWM signal based on a user-selected spray setting received from the spray pressure setting input.

[0008] From DE 10 2015 010 882 Al is a manual fluid patent application. Applicant: J. Wagner GmbH. Status: 13.08.2025. Our reference: W 2375-PC / DR - 2 -

[0009] A known application method for surfaces with an application device, wherein the application device has a handle and a plurality of dispensing openings arranged in at least one row for dispensing a fluid. The following are performed:

[0010] - one or more preparatory steps, which include cleaning the dispensing openings and releasing the dispensing openings by moving a cover away from the dispensing openings,

[0011] - one or more application steps in which the application device is moved by hand parallel to a surface at a distance of between 1 and 20 cm, wherein the dispensing openings are directed towards the surface such that the projection points of adjacent dispensing openings of a row onto the surface have a distance of 0.5 mm to 3 mm and their projection axes have a directional deviation of a maximum of 0.2 degrees and

[0012] - when a button is pressed, a periodic release of drops of fluid is activated through all or a selection of the release openings onto the surface in a drop-on-demand procedure, followed by one or more post-processing steps, including closing the release openings by moving the cover over the release openings and cleaning the release openings in case of contamination with fluid outside the release openings.

[0013] The object of the invention is to propose a hand-operated paint spraying device and a method for operating a hand-operated paint spraying device, which enables comfortable hand operation and improved paint application.

[0014] This problem is solved by the features of claim 1 and 7, respectively. Advantageous and expedient further developments are specified in the respective dependent claims. Patent application Applicant: J. Wagner GmbH Date: August 13, 2025 Our reference: W 2375-PC / DR - 3 -

[0015] The hand-operated paint spraying device according to the invention, which is in particular designed as a hand-operated paint spray gun or hand-operated paint spray lance, which operates in an airless mode, comprises: a housing, a spray nozzle, a paint supply line, a paint flow device and a trigger, wherein the paint flow device is arranged between the paint supply line and the spray nozzle, wherein the paint spraying device comprises a detection device and a controller, wherein the detection device detects a respective actuation level of the trigger and reports it to the controller, and wherein the controller, based on the detected actuation level of the trigger, sends a signal to the paint flow device, corresponding to the actuation level, from a multitude of different signals, for alternating opening and closing of the paint flow device.such that the amount of paint flowing through the paint flow device corresponds to the respective degree of actuation. It was found that when using such a pulsed paint flow device, the pressure prevailing in the paint remains largely constant, so that, in comparison to the conventional use of a needle valve, which hardly allows any regulation of the paint flow, regulation of the paint flow is possible regardless of the paint nozzle used. When using a needle valve, the amount of paint dispensed is essentially determined by the combination of the paint nozzle used with it. Regulating the paint flow with such a needle valve in the airless process, for example by a valve that is not fully open, produces an unacceptable spray pattern. With the paint spraying device according to the invention, it is possible for a user toa quantity of paint intended for a paint application by means of a decoupling without loss of quality of the,

[0016] to meter the spray pattern. Likewise, the user does not need to know the critical opening positions of the valve for paint application – as is the case with a conventional direct actuation of a mechanical valve – since the amount of paint dispensed is determined by the controller, thus ensuring a suitable response from the paint spraying device. The signal that the controller sends to the paint delivery device is either calculated based on a formula stored in the controller or read from a database stored in the controller. The amount of paint supplied to the spray nozzle per unit of time is controlled by the ratio of the opening time to the closing time of the paint delivery device.

[0017] It may be provided that the signal is generated as a pulse width modulation signal - abbreviated: PWM signal - in the form of square waves.

[0018] In principle, the color transmission device may comprise a valve with a single piston, a valve with multiple pistons, a pinch valve, or another arrangement suitable for both preventing and allowing the flow of color. It may be provided that the color transmission device can switch between an open and a closed state at a frequency in the range of 1 to 100 Hz, and particularly 40 to 60 Hz.

[0019] Furthermore, it may be possible to equip the detection device with a sensor.

[0020] Furthermore, it may be possible to implement the alternating opening and closing of the color transmission device as periodic opening and closing. Patent application Applicant: J. Wagner GmbH Date: August 13, 2025 Our reference: W 2375-PC / DR

[0021] - 5 -

[0022] The amount of ink emitted is determined by the aforementioned ratio of the opening time to the closing time of the ink transmitter. In other words, the amount of ink flowing through the ink transmitter is determined by the so-called duty cycle.

[0023] Furthermore, the detection device can be designed to record and report to the controller a neutral position, a fully pulled position, and several other trigger positions between the neutral and fully pulled positions. This allows the trigger position to be accurately recorded across its entire operating range.

[0024] It is also possible to equip the color transmission device with an actuator, whereby the actuator is controlled by the controller in such a way that the amount of ink flowing through the color transmission device per unit of time is determined by a movement control of its actuating element. The operation of such an actuator can be implemented technically simply.

[0025] The actuator for moving the positioning device can, in particular, comprise an electromagnet, an electric motor, or another motion generator based on a physical effect. Such actuators are available as cost-effective standard components. In particular, it is intended that the color transmission device be implemented by a valve, especially a solenoid valve, controlled by pulse-width modulation. Patent application Applicant: J. Wagner GmbH Date: August 13, 2025 Our reference: W 2375-PC / DR - 6 -

[0026] Furthermore, the paint spraying device can be equipped with a pump that supplies paint to the paint supply line. In particular, the pump output is regulated by the controller to maintain a desired paint pressure in the supply line, which is specified by the controller. This allows for further control over the spraying behavior of the paint spraying device.

[0027] It may also be possible to equip the paint spraying device with an adjustment device connected to the controller. This adjustment device sets a sensitivity level for the paint flow device, thus determining the amount of paint supplied to the spray nozzle per unit of time. However, it is specifically intended that the trigger continues to control the paint flow throughout its entire travel, and / or that the adjustment device sets a pressure for the paint supplied to the paint flow device, and / or that the adjustment device sets a temperature for the paint in the paint supply line. This allows the user to modify the response of the paint spraying device to trigger actuation and thus adapt it to individual circumstances and / or requirements.

[0028] Furthermore, it may be possible to implement the adjustment device using an electronic device, which is wirelessly or wired connected to the controller and is particularly designed as a mobile electronic device, whereby it is specifically intended to integrate the electronic device (Patent Application Applicant: J. Wagner GmbH, Date: August 13, 2025, Our Reference: W 2375-PC / DR-7) as part of the paint spraying device. This facilitates the making of adjustments.

[0029] It may also be provided that the paint spraying device is additionally equipped with a shut-off valve, wherein the shut-off valve is arranged in the paint channel before or after the paint flow device, and wherein it is particularly possible to design the shut-off valve as a manually operated shut-off valve, which is particularly actuated simultaneously by the trigger, or to design the shut-off valve as an electrically actuated shut-off valve, which is particularly actuated by the detection device and the controller. By additionally installing a dedicated shut-off valve, the paint flow device can be reliably blocked.

[0030] Furthermore, the paint passage device can be positioned in the paint flow between the pump and the spray nozzle. This allows the paint passage device to prevent pressure fluctuations caused by the pump from affecting the spray quality, as these fluctuations can be compensated for by the paint passage device. For such compensation, it can be specifically provided that the pressure prevailing upstream of the paint passage device is measured and the measurement results are transmitted to the controller. The controller then corrects these measurements and sends signals to the paint passage device to compensate for the pressure change.

[0031] The method according to the invention is for operating a manually operated paint spraying device, in particular a manually operated paint spray gun or a manually operated paint spray lance, which operates in an airless mode and patent application applicant: J. Wagner GmbH, date: 13.08.2025, our reference: W 2375-PC / DR - 8 - which can be designed in particular according to the above descriptions, and comprises the following steps: depending on the degree of actuation of the trigger of the paint spraying device, a signal associated with the degree of actuation is sent to the paint passage device from a multitude of different signals for an alternating opening and closing of a paint passage device of the paint spraying device, thereby controlling a quantity of paint with which the spray nozzle is supplied per unit of time.

[0032] This method allows a user to dispense a specific amount of paint for application using a trigger, without the critical opening positions associated with a conventional paint application valve. This is because the amount of paint dispensed is determined by the controller, and thus the response is not determined by the behavior of a valve mechanically actuated by the trigger, but rather by the controller itself. The signal that the controller sends to the paint delivery device is either calculated based on a formula stored within the controller or read from a database stored in the controller. The amount of paint supplied to the spray nozzle per unit of time is controlled by the ratio of the opening time to the closing time of the paint delivery device.

[0033] Furthermore, it may be possible to implement the alternating opening and closing of the color transmission device as periodic opening and closing.

[0034] It may also be provided that, in addition to a zero position and a fully withdrawn position, the detection device can detect several further operating positions of the trigger, which lie between the zero position and the fully withdrawn position, and report them to the controller.

[0035] It can also be provided that different signals are used to specify different ratios of opening and closing times for the paint release mechanism, so that with increasing trigger actuation, an increasing amount of paint per unit of time is released to a spray nozzle of the paint spraying device. This ensures that the trigger's response remains consistent for the user, regardless of other parameters, thus simplifying the spraying process.

[0036] Furthermore, it may be possible to generate the controller signals additionally depending on a prevailing pressure (PF) of the paint (F), which is measured by a pressure sensor, and / or additionally depending on a viscosity of the paint (F), which is measured by a viscosity sensor, and / or additionally depending on a temperature of the paint (F), which is measured by a temperature sensor. This allows at least one additional parameter to influence the signals, so that the desired spray pattern can be generated even more reliably, since at least one additional disturbance factor is taken into account.

[0037] Furthermore, it can be provided that the pressure is generated by a pump which is part of the paint spraying device, and in particular that the pump output of the pump is regulated by the controller, whereby the pressure of the paint in the paint supply line is maintained at a desired value. Patent application Applicant: J. Wagner GmbH Status: 13.08.2025 Our reference: W 2375-PC / DR - 10 - which is specified in particular by the controller or an adjustment device. Because the paint spraying device includes the pump, the detection and processing of pressure and pump output in the controller is simplified. The paint supply line can also be designed as a flexible line, at least in sections, with a length of several meters.

[0038] It may also be possible to generate the paint temperature using a heater that is part of the paint spraying device. In particular, it may be possible for the heating output of the heater to be regulated by the controller in such a way that the temperature of the paint in the paint supply line is maintained at a desired value, which is specified, in particular, by the controller or an adjustment device. This allows for further optimization of the spray pattern.

[0039] It may also be provided that the paint spraying device is equipped with an adjustment device, whereby the adjustment device for the paint flow unit specifies a maximum amount of paint with which the spray nozzle is supplied per unit of time and / or whereby the adjustment device specifies a pressure for the paint supplied in the paint supply line of the paint flow unit. This makes the operation of the paint spraying device easier for the user.

[0040] Finally, it may be possible to control the color transmission device by means of the controller in such a way that at least 10% and in particular at least 20% of a quantity of color is transmitted, as described in the patent application. Applicant: J. Wagner GmbH, Date: August 13, 2025, Our reference: W 2375-PC / DR - 11 -

[0041] Maximum flow through the paint passage device can be achieved if it is permanently open and / or if the controller, based on a setting of the adjustment device, controls the paint passage device in such a way that it is permanently open from a trigger actuation level of 90%, and especially from 80%. Such a method avoids undesirably short opening times and thus high noise levels. Furthermore, in normal operation, where large areas need to be sprayed, energy consumption can be reduced and noise from the paint passage device can be completely avoided.

[0042] For the purposes of this invention, the general term "paint" also includes varnishes.

[0043] Further details of the invention are described in the drawing with reference to schematically illustrated exemplary embodiments.

[0044] This shows:

[0045] Fig. 1 is a schematic representation of a device according to the invention.

[0046] Paint sprayer.

[0047] Figure 1 shows a schematic representation of a paint spraying device 1 according to the invention in a side view.

[0048] The paint spraying device 1 is designed as a hand-operated paint spray gun 1a and operates in an airless mode. The paint spraying device 1 comprises a housing 2, a spray nozzle 3, a paint supply line 4a (shown in section), a paint flow device 5, a trigger 6, a detection device 7, and a controller 8. Patent application Applicant: J. Wagner GmbH Date: August 13, 2025 Our reference: W 2375-PC / DR

[0049] - 12 -

[0050] The color transmission device 5 is arranged between the color supply line 4a and the spray nozzle 3, such that a color F flowing through the color supply line 4a enters a color channel FK5 of the color transmission device 5 at an inlet 9 and exits the color channel FK5 of the color transmission device 5 at an outlet 10, flowing into an inlet 11 of the spray nozzle 3. The color transmission device and the spray nozzle can also be formed as a single unit, so that the spray nozzle forms part of the color transmission device.

[0051] The detection device 7 records the position of the trigger 6 as an actuation level from 6-0 to 6-9 and reports this to the controller 8. In Figure 1, the trigger 6 is in an unactuated position, or zero position, and thus has an actuation level of 6-0. Figure 1 also shows the trigger 6 in a fully pulled position, in which the trigger 6 has an actuation level of 6-9. A middle position is also shown, in which the trigger 6 has an actuation level of 6-5. Further intermediate positions are indicated as actuation levels 6-1, 6-2, 6-3, 6-4, 6-6, 6-7, and 6-8. Basically, the trigger 6 is controlled by a user between the zero position and actuation level 6-0.

[0052] - and the fully withdrawn position - degree of actuation 6-9

[0053] - continuously adjustable and the detection device 7 detects its positions at least with the specified degrees of actuation. Detection with much smaller steps may also be provided.

[0054] Accordingly, the detection device 7 records the respective position of the trigger 6 and transmits the corresponding degree of actuation to the controller 8. Based on the currently detected degree of actuation, the controller 8 then generates a corresponding signal S 6-X for the alternating opening and closing of the ink passage device.

[0055] 7, such that a quantity of paint FM is controlled, with which patent application Applicant: J. Wagner GmbH Status: 13.08.2025 Our reference: W 2375-PC / DR - 13 - the spray nozzle 3 is supplied per unit of time. By opening and closing according to a predetermined duty cycle, a quantity of paint FM of color F is controlled, with which the spray nozzle 3 is supplied per unit of time by the paint transmission device 5. The duty cycle is to be understood as the ratio of the on-time to the period of a pulse-width modulation signal, whereby the duty cycle is referred to as "duty cycle" in English. For paint spraying, period durations between 1 second and 0.01 seconds are provided. Preferably, the period duration for paint spraying is between 0.025 seconds and 0.0166 seconds.

[0056] The color transmission device 5 comprises an actuator A13. The actuator A13 comprises a valve 12, wherein the valve 12 includes a piston 13a, a valve block 12a, and an electromagnet E13. The piston 13a forms a control element 13 of the actuator. The control element 13 is moved back and forth by the electromagnet E13 according to the signal S6-X such that the color channel FK5 is open for a first time interval during a period – as shown in Figure 1 – and that the color channel FK5 is closed for a second time interval of this period. The electromagnet E13 can receive, in particular, a square wave signal from the controller 8, which specifies an opening time and a closing time that the valve 12 has within the period. In this case, valve 12 is energized and thus open for one pulse duration and unenergized and thus closed for the remaining period.

[0057] It is also possible to use a valve with multiple pistons as an actuator, thus reducing the pulsation of the paint F flowing into the spray nozzle 3. Patent application Applicant: J. Wagner GmbH Date: August 13, 2025 Our reference: W 2375-PC / DR - 14 -

[0058] Furthermore, it may be possible to use a piezoelectric element instead of a valve to open and close the color channel according to a duty cycle.

[0059] The detection device 7 comprises a sensor S7. This is preferably designed as an optical displacement sensor or a mechanical displacement sensor.

[0060] Furthermore, the paint spraying device 1 can be equipped with a pump 14, which is supplied with paint F via a supply line V4. The pump output of the pump 14 can also be regulated by the controller 8. This allows for further influence on the spraying behavior and spray pattern of the paint spraying device 1. Pressures of 30 to 300 bar are specified for paint F.

[0061] It is also possible to supply the pump as a stationary unit, such that the pump is connected to the paint spray gun via a hose.

[0062] Furthermore, the paint spraying device 1 can be equipped with an adjustment device 15. The adjustment device 1 is connected wirelessly or via a wire to the controller 8. The adjustment device 15 allows the user to specify the amount of paint EM with which the spray nozzle 3 is supplied per unit of time for the paint transmission device 5, and / or it allows the user to specify a pressure PF for the paint F supplied in the paint supply line 4a of the paint transmission device 5. Such settings allow the user to modify the response of the paint spraying device 1 to the actuation of its trigger 6 and thus adapt the spraying behavior to individual circumstances and / or their individual requirements. Patent application applicant: J. Wagner GmbH, Date: August 13, 2025, Our reference: W 2375-PC / DR-15

[0063] Furthermore, the adjusting device 15 can be formed by an electronic device 16, which is connected wirelessly or via a wired connection to the controller 8. The electronic device 16 can be designed as a mobile electronic device 17. The electronic device 16 can be part of the paint spraying device 1, such that the latter includes the electronic device 16.

[0064] It may be possible to measure the pressure PF of the ink F using a pressure sensor PS in the ink supply line, whereby the pressure sensor PS communicates with the controller so that it is constantly informed about the current pressure PF of the ink F.

[0065] Alternatively or additionally, it can also be provided to measure the viscosity VF of the paint F in the paint supply line using a viscosity sensor VS, whereby the viscosity sensor VS communicates with the controller so that the controller is constantly informed about the current viscosity. In this case, the viscosity sensor VS is in particular a viscometer.

[0066] Alternatively or additionally, it may also be possible to measure a temperature TF of the color F in the color supply line using a temperature sensor TS, whereby the temperature sensor TS communicates with the controller so that it is constantly informed about the current temperature.

[0067] The controller 8 contains a predefined response behavior for the paint spraying device 1, which is active for operation. Multiple response behavior variants can also be stored. Patent application applicant: J. Wagner GmbH, Status: August 13, 2025, Our reference: W 2375-PC / DR - 16 -. A user can then activate their desired response behavior variant for spraying operation using the setting device 15. In particular, at least one of the following four response behavior variants is stored in the controller 8:

[0068] In one variant, the respective trigger position corresponds to the amount of ink flowing through the ink passage device. This means that as the trigger position increases towards the fully pulled position (6-9), the amount of ink flowing through the ink passage device increases, and conversely, as the trigger position decreases towards the zero position (6-0), the amount of ink flowing through the ink passage device decreases.

[0069] In a second variant, the different operating positions 6-0 to 6-9 are implemented analogously to the behavior of a conventional paint sprayer with a mechanical trigger. Accordingly, only one I / O signal is generated, whereby, for example, in the confirmation position 6-0, "OFF" is always output, and in operating positions 6-1 to 6-9, "ON" is always output. Alternatively, the switching point at which the I / O signal is generated can be set for each of the operating positions 6-1 to 6-9. A damping factor can also be stored or selected, so that, for example, in "ON," 100%, 80%, or 50% of the maximum amount of paint flowing through the paint passage device is allowed to pass through.

[0070] A third variant represents a modification of the first variant, since here the amount of color with which the

[0071] The maximum flow through the color transmission device can be limited, e.g., to half, a third, or any other proportion, so that the sprayed amount can be regulated. Patent application applicant: J. Wagner GmbH, Date: August 13, 2025, Our reference: W 2375-PC / DR - 17 -

[0072] All operating positions 6-0 to 6-9 are available for adjusting the paint quantity, allowing the user to precisely control the paint output. The third variant can also be designed as a sub-function of the first variant's response behavior, for example, by selecting the first variant's response behavior and allowing the user to set the maximum permissible paint quantity using a digital or mechanical control. In particular, a mechanical rotary control can be provided on the paint sprayer, enabling the user to quickly change the maximum permissible paint quantity during operation.

[0073] A fourth option for trigger response allows for the setting of a trigger travel characteristic. This allows, for example, a linear, progressive, or degressive spray pattern to be defined. It can also be possible to store a fourth option for multiple users, so that each user can activate their individual trigger response. It can also be possible to store multiple trigger travel characteristics per user. Setting a trigger travel characteristic can be done, in particular, via an app on a mobile device that communicates with the controller, allowing a curve representing the trigger travel characteristic to be configured by touching a touchscreen.

[0074] In the manually operated paint spraying device, it can therefore be provided that at least one variant of a response behavior and, in particular, at least two variants of response behavior are stored in the controller 8, wherein for each variant of a response behavior, it is defined, in particular in the controller 8, how the individual actuation positions 6-0 to 6-9 of the trigger 6 are controlled with regard to a quantity of paint with which the paint passage device 5 flows through, by the controller for the

[0075] Color transmission device 5 will be implemented.

[0076] Patent application Applicant: J. Wagner GmbH Date: August 13, 2025 Our reference: W 2375-PC / DR

[0077] - 19 -

[0078] Reference character list

[0079] 1 hand-operated paint sprayer la hand-operated paint spray gun

[0080] 2 cases

[0081] 3 spray nozzles

[0082] 4a Paint supply line

[0083] 5 Color transmission device

[0084] 6 deduction

[0085] 6-0 to 6-9 Actuation level of 6

[0086] 7 Data collection device

[0087] 8 controllers

[0088] 9 of 5

[0089] 10 Exit from 5

[0090] 11 Admission from 3

[0091] 12 valve of A13

[0092] 12a Valve block of 12

[0093] 13 actuators of A13

[0094] 13a Piston of 12

[0095] 14 pumps from 1

[0096] 15 Adjustment device

[0097] 16 electronic device

[0098] 17 mobile electronic devices

[0099] Al 3 actuator

[0100] E13 Electromagnet of 12

[0101] F color

[0102] FK5 color channel of 5

[0103] FM Color Quantity

[0104] S 6-X signal from 8 to 5

[0105] S7 sensor of 7

[0106] V4 supply line for 14 or . 1 , la

[0107] SV shut-off valve

[0108] PF pressure of F

[0109] PS pressure sensor

[0110] VF Viscosity of F Patent application Applicant: J. Wagner GmbH Status: 13.08.2025 Our reference: W 2375-PC / DR

[0111] - 20 -

[0112] VS viscosity sensor

[0113] TF temperature of F

[0114] TS temperature sensor

Claims

Patent application Applicant: J. Wagner GmbH Status: 13.08.2025 Our reference: W 2375-PC / DR - 21 - Claims:

1. Paint spraying device (1), in particular a hand-operated paint spray gun (1a) or hand-operated paint spray lance, which operates in an airless mode, comprising: a housing (2), a spray nozzle (3), a paint supply line (4a), a paint passage device (5) and a trigger (6), wherein the paint passage device (5) is arranged between the paint supply line (4a) and the spray nozzle (3), characterized in that - that the paint spraying device (1) comprises a detection device (7) and a controller (8), that the detection device (7) detects a respective actuation level (6-0 to 6-9) of the trigger (6) and reports it to the controller (8), that the controller (8), based on the detected actuation level (6-0 to 6-9) of the trigger (6), sends a signal (S6-X) corresponding to the actuation level (6-0 to 6-9) to the paint transmission device (5) from a multitude of different signals (S6-X) for an alternating opening and closing of the paint transmission device (5), such that a quantity of paint (FM) flowing through the paint transmission device (5) corresponds to the respective actuation level (6-0 to 6-9).

2. Paint spraying device according to claim 1, characterized in that the detection device (7) detects a zero position (6-0) and a fully withdrawn position (6-9) as well as several other actuation positions (6-1 to 6-8) of the trigger (6) and reports them to the controller (8). Patent application Applicant: J. Wagner GmbH Status: 13.08.2025 Our reference: W 2375-PC / DR - 22 - 3. Paint spraying device according to at least one of the preceding claims, characterized in that the paint transmission device (5) comprises an actuator (A13) which is controlled by the controller (8) such that the amount of paint (FM) flowing through the paint transmission device (5) per unit of time is determined by a movement control of its actuating means (13), wherein the actuator (A13) for moving the actuating means (15) comprises in particular an electromagnet (E13) or an electric motor or a piezoelectric element or another motion generator based on a physical effect, wherein the paint transmission device is in particular designed by a valve controlled by means of the modulation type "pulse width modulation", preferably a solenoid valve, wherein control is preferably effected by changing a pulse duration while keeping the period constant and by adjusting a pause duration to the change.

4. Paint spraying device according to at least one of the preceding claims, characterized in that the paint spraying device (1) comprises a pump (14) through which the color supply line (4a) is supplied with color (F), wherein it is provided in particular that a pumping capacity of the pump (14) is regulated by the controller (8) in order to maintain a pressure of the color (F) in the color supply line (4a) at a desired value (PF), which is specified in particular by the controller (8).

5. Paint spraying device according to at least one of the preceding claims, characterized in that the paint spraying device (1) has an adjustment device (15) includes, Patent application Applicant: J. Wagner GmbH Status: 13.08.2025 Our reference: W 2375-PC / DR - 23 - wherein the adjusting device (15) is connected to the controller (8), wherein it is provided in particular that a duty cycle and thus the quantity of ink (EM) with which the spray nozzle (3) is supplied per unit of time is specified by means of the adjusting device (15) for the ink transmission device (5), wherein it is provided in particular, however, that the trigger continues to serve to control the quantity of ink over its entire travel and / or that a pressure (PF) for the ink (F) supplied in the ink supply line (4a) of the ink transmission device (5) is specified by means of the adjusting device (15) and / or that a temperature (TF) for the ink (F) in the ink supply line (4) is specified by means of the adjusting device (15).

6. Paint spraying device according to at least one of the preceding claims, characterized in that the adjustment device (15) is formed by an electronic device (16) which is wirelessly or wired connected to the controller (8) and is in particular designed as a mobile electronic device (17), wherein it is in particular provided that the electronic device (16) is part of the paint spraying device (1).

7. Paint spraying device according to at least one of the preceding claims, characterized in that the paint spraying device comprises a shut-off valve (SV), wherein the shut-off valve (SV) is arranged before or after the paint passage device (5) in the paint channel, wherein it is particularly provided that Patent application Applicant: J. Wagner GmbH Status: 13.08.2025 Our reference: W 2375-PC / DR - 24 - that the shut-off valve is designed as a manually operated shut-off valve, which is actuated in particular by the trigger, or that the shut-off valve is designed as an electrically actuated shut-off valve, which is actuated in particular by the detection device (7) and the controller (8).

8. Paint spraying device according to at least one of the preceding claims, characterized in that the paint spraying device comprises a pump (14), wherein the paint passage device (5) is arranged in the paint flow between the pump (14) and the spray nozzle (3).

9. Method for operating a manually operated paint spraying device (1), in particular a manually operated paint spray gun (1a) or a manually operated paint spray lance which operates in an airless mode, in particular according to at least one of the preceding claims 1 to 8, characterized in that, depending on an actuation degree (6-0 to 6-9) of the trigger (6) of the paint spraying device (1), a signal (S6-X) associated with the actuation degree (6-0 to 6-9) is sent from the controller (8) to the paint passage device (5) for an alternating opening and closing of a paint passage device (5) of the paint spraying device (1), whereby a quantity of paint (EM) with which the spray nozzle (3) is supplied per unit of time is controlled by the controller (8).

10. Method according to claim 9, characterized in that the detection device (7) additionally provides a Patent application Applicant: J. Wagner GmbH Status: 13.08.2025 Our reference: W 2375-PC / DR - 25 - In addition to the zero position (6-0) and a fully withdrawn position (6-9), several further operating positions (6-1 to 6-8) of the trigger (6) are detected and reported to the controller (8).

11. Method for operating a paint spraying device according to at least one of the preceding claims 9, 10, characterized in that different ratios of opening and closing times for the paint transmission device (5) are specified by the different signals (S6-X), so that with increasing actuation degree (6-0 to 6-9) of the trigger (6) an increasing amount of paint (FM) per unit of time is allowed to pass through to a spray nozzle (3) of the paint spraying device (1).

12. Method for operating a paint spraying device according to at least one of the preceding claims 9 to 11, characterized in that the controller (8) additionally generates the signals (S6-X) depending on a prevailing pressure (PF) of the paint (F), which is measured by a pressure sensor (PS), and / or on a viscosity of the paint (F), which is measured by a viscosity sensor (VS), and / or on a temperature of the paint (F), which is measured by a temperature sensor (TS).

13. Method for operating a paint spraying device according to at least one of the preceding claims 9 to 12, characterized in that a pressure (PF) of the paint (4) is generated by a pump (14) which is a component of the paint spraying device (1) and wherein it is particularly provided that a Patent application Applicant: J. Wagner GmbH Status: 13.08.2025 Our reference: W 2375-PC / DR - 26 - The pumping capacity of the pump (14) is regulated by the controller (8) in such a way that the pressure (PF) of the paint (F) in the paint supply line (4a) is kept at a desired value, which is specified in particular by the controller (8) or an adjustment device (15).

14. Method for operating a paint spraying device according to at least one of the preceding claims 9 to 13, characterized in that the temperature (TF) of the paint (F) is generated by a heater which is part of the paint spraying device (1) and wherein it is provided in particular that the heating power of the heater is regulated by the controller (8) such that the temperature (TF) of the paint (F) in the paint supply line (4a) is kept at a desired value, which is specified in particular by the controller (8) or an adjustment device (15).

15. Method for operating a paint spraying device according to at least one of claims 9 to 14, characterized in that the paint spraying device (1) comprises an adjustment device (15), wherein by means of the adjustment device (15) a quantity of paint (FM) is specified for the paint transmission device (5) with which the spray nozzle (3) is supplied at most per unit of time and / or wherein by means of the adjustment device (15) a pressure (PF) is specified for the paint (F) supplied in the paint supply line (4a) of the paint transmission device (5).

16. Method for operating a paint spraying device according to at least one of claims 9 to 15, characterized in that, Patent application Applicant: J. Wagner GmbH Status: 13.08.2025 Our reference: W 2375-PC / DR - 27 - that the controller (8) controls the color transmission device (5) based on a setting of the adjusting device (15) such that at least 10% and in particular at least 20% of a quantity of ink is transmitted, with which the color transmission device (5) can be maximally supplied when it is permanently open and / or that the controller (8) controls the color transmission device (5) based on a setting of the adjusting device (15) such that the color transmission device (5) is permanently opened by the controller (8) from an actuation level (6-0 to 6-9) of the trigger of 90% and in particular of 80%.

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