Paint pistol

Abstract

The invention relates to a paint pistol (100) comprising: a paint pistol body (10); a measuring unit, in particular a digital unit (30); a first interface (40, 140, 340) on the paint pistol body (10) for connecting the measuring unit, in particular the digital unit (30), to the paint pistol body (10); and a second interface (50, 250, 350) on the measuring unit, in particular the digital unit (30), said second interface corresponding to the first interface (40, 140, 340), wherein the first interface (40, 140, 340) and the second interface (50, 250, 350) have a mechanical closure (60, 160, 360) which is designed to release the connection under the effect of an impact force.

Description

[0001] paint spray gun

[0002] The invention relates to a paint spray gun and a use of a first interface and a second interface in such a paint spray gun as well as the use of a measuring unit, in particular a digital unit, and / or a sensor in such a paint spray gun, as well as a measuring unit, in particular a digital unit.

[0003] Paint spray guns are generally well-known in the art and are used, for example, in automotive workshops for painting cars. Paint spray guns are used to atomize flowable material and apply it to a surface. The material to be applied can be either liquid or powder. Paint spray guns often have sensors for monitoring. The evaluation is usually carried out using digital units or other measuring devices attached to the paint spray gun.

[0004] In this context, it has now become apparent that there is a further need to provide a paint spray gun, in particular there is a need to provide a paint spray gun with a possibility of protecting the high-quality measuring unit, in particular the digital unit.

[0005] These and other objects, which will be mentioned upon reading the following description or which may be recognized by a person skilled in the art, are achieved by the subject matter of the independent claims. The dependent claims further develop the central idea of ​​the present invention.

[0006] According to a first aspect of the present invention, a paint spray gun is provided, comprising: a paint spray gun body, a measuring unit, in particular a digital unit, a first interface on the paint spray gun body for connecting the measuring unit, in particular a digital unit, to the paint spray gun body, and a second interface on the digital unit which corresponds to the first interface, wherein the first interface and the second interface have a mechanical closure which is configured to release the connection upon the action of an impact force.

[0007] According to a further aspect of the present invention, a paint spray gun is provided, comprising: a paint spray gun body, a first interface on the paint spray gun body for arranging a measuring unit, in particular a digital unit, on the paint spray gun body, wherein the first interface comprises at least part of a bayonet closure, wherein the at least part of the bayonet closure has at least one bayonet recess, wherein the bayonet recess is designed as a spring clip and / or is formed by spring clips.

[0008] According to a further aspect, a measuring unit, in particular a digital unit, for connection to a paint spray gun is provided, wherein the measuring unit has at least two bayonet lugs, wherein at least one surface of the at least two bayonet lugs facing the measuring unit extends obliquely to the extension axis of the at least two bayonet lugs.

[0009] The following statements can apply to each of the paint spray guns according to the invention. The following statements can apply to the measuring unit according to the invention, in particular the digital unit. The paint spray gun according to the invention described second can have the same features as the paint spray gun according to the invention described first, and vice versa. The paint spray gun according to the invention described second can have the same additional components as the paint spray gun according to the invention described first, and vice versa. The features described in the context of the paint spray guns according to the invention can apply to the measuring unit according to the invention, in particular the digital unit. The measuring unit according to the invention, in particular the digital unit, can be used in the paint gun according to the invention.

[0010] The term "paint spray gun" refers in particular to a hand-held paint application unit with a trigger handle for actuating one or more valves, which is / are designed to release a paint flow and optionally an air flow. The terms "paint gun", "paint nozzle" or other designations containing the terms "paint" or "color" are not to be understood as restricting these materials. The paint spray gun according to the invention can be used to spray, for example, paint, adhesive or varnish, in particular base and clear coat, both solvent-based and water-based, as well as liquids for the food industry, wood preservatives or other liquids. The said paint gun can be a hand-held paint gun, but also an automatic or robotic gun. Hand-held paint guns are primarily used by craftsmen, in particular painters, carpenters and varnishers.Automatic and robot guns are generally used in conjunction with a painting robot or a painting machine for industrial applications. However, it is also conceivable to integrate a manual spray gun into a painting robot or a painting machine. In particular, a paint gun according to the invention designed as a hand-held paint gun can be designed as a gravity-feed gun with a paint cup arranged above the paint gun body, from which the material to be sprayed flows into and through the paint channels essentially by gravity and by vacuum at the front end of the paint nozzle. However, the paint gun according to the invention can also be a side-feed gun, in which the paint cup is arranged on the side of the paint gun body, and in which the material is also fed to the gun by gravity and by vacuum at the front end of the material nozzle.However, the paint spray gun according to the invention can also be designed as a suction or suspended cup gun with a paint cup arranged below the paint gun body, from which the material to be sprayed is sucked out of the cup essentially by vacuum. Furthermore, it can be designed as a pressure cup gun, in which the cup is arranged below, above, or to the side of the paint gun body and is pressurized, whereupon the material to be sprayed is forced out of the cup. Furthermore, it can be a pressure-feed gun, in which the material to be sprayed is fed to the spray gun via a hose from a paint container or via a pump. The paint spray gun according to the invention can be a low-pressure gun, in particular an HVLP gun, with an internal nozzle pressure of a maximum of 10 psi or 0.7 bar, whereby transfer rates of more than 65% can be achieved.However, it can also be a compliant gun, which has an internal nozzle pressure of more than 10 psi or 0.7 bar, but still achieves a transfer rate of more than 65%. It can be an air-atomizing spray gun. It can be an air-assisted spray gun. It can be an airless gun. It can be a powder coating gun. It can be an electrostatic gun. It can be a rotary atomizer. However, it can also be a different type of spray gun.

[0011] The term "spray gun body" refers in particular to a housing designed to arrange the components of a spray gun relative to one another and to at least partially enclose them. The spray gun body in particular has a handle. The spray gun can have a compressed air connection, a paint needle, a trigger for opening an air valve and for moving the paint needle out of the outlet opening of the paint nozzle, a round-to-wide jet regulator for adjusting the ratio of atomizing air and horn air to shape the paint jet, an air micrometer for adjusting the spray pressure, a material flow regulator for adjusting the maximum material flow rate, a material connection, paint channels for directing the material to be sprayed from a material inlet to the material outlet opening, a suspension hook, and / or an analog or digital pressure measuring device.However, it can also comprise other components from the prior art. In or on the spray gun body, a needle valve for applying paint and, if applicable, an air valve for releasing compressed air, a compressed air connection, and a paint connection are arranged. Furthermore, a paint nozzle body is arranged on the spray gun body. The spray gun body has, in particular, an interface for the paint nozzle body, and the paint nozzle body has a corresponding interface. The interfaces are, in particular, designed as threads. The spray gun body can be made of plastic or metal.

[0012] The term “connection to the spray gun body” or “connected to the spray gun body” refers to direct connections, but also connections via an adapter, a fastening element, a connecting element or other.

[0013] The term “measuring unit” refers in particular to a digital or analog unit, in particular an assembly, which is designed to record, in particular to measure, physical quantities by mechanical, electronic or other means. The physical quantity can be, for example, a pressure, in particular a material pressure and / or an air pressure, a temperature, in particular an air temperature, or a humidity, in particular an air humidity. The measuring unit can have a display to show the recorded quantities. For example, the measuring unit can be an analog manometer or a digital pressure measuring device.

[0014] The term “digital unit” refers in particular to a digital processing unit that is configured to process signals from a sensor. The sensor can, for example, be one of the following: pressure sensor, temperature sensor, humidity sensor. The digital unit can, for example, be configured to display the processed signal (e.g. the specific pressure) on a display of the digital unit. The digital unit can furthermore have interfaces for transmitting data or signals, a memory and / or a power supply. The digital unit is, for example, a microcontroller, a processor, an arithmetic logic unit, a digital signal processor, a system on chip, or a programmable logic unit. The digital unit is a unit that is configured to respond to commands and execute them in a specific manner. The digital unit is, in particular, programmable.The digital unit can have a display for showing the processed signals. The digital unit can have a data interface to a sensor. The digital unit can have an interface to a sensor or to a data evaluation device, which can be configured as wired or wireless, in particular as an OTA, via radio, WLAN, Bluetooth, or similar.

[0015] The term “interface” in this case refers in particular to a mechanical interface for connecting the spray gun body to the digital unit.

[0016] The term “closure” in this case refers in particular to a mechanical connection between the paint spray gun body and the measuring unit, in particular a digital unit. The mechanical connection can comprise a positive connection. The mechanical connection can comprise a non-positive connection. The mechanical connection can be a plug-in connection. The mechanical connection can be a snap-in connection. The mechanical connection can be a rotary locking mechanism. The mechanical connection can in particular be designed such that an impact force leads to an opening of the connection. The impact force can in particular lead to an elastic deformation of at least one of the components of the mechanical connection, such that the mechanical connection is opened or released. For example, the mechanical connection is a plug-in connection with a correspondingly selected fit of the two components of the plug-in connection.

[0017] The term “release the connection” in this case means a non-destructive elastic deformation of the first and / or second interface as a result of the impact force, so that the connection is released when a threshold is exceeded.

[0018] The invention is based on the finding that paint spray guns have measuring units and / or sensors and associated evaluation devices or display devices for monitoring their condition or the painting work. These measuring units, evaluation devices or display devices, which are referred to here as measuring units, in particular digital units, are considerably more sensitive than the paint spray guns, and in particular digital units are considerably more sensitive and expensive than other attachments or accessories. The measuring units, in particular digital units, can be retrofitted. The measuring units, in particular digital units, are highly sensitive to impact forces. These impact forces occur, for example, when the paint spray gun is dropped. These impact forces can cause considerable damage to the measuring unit, in particular the digital unit.This damage can lead to total failure of the measuring unit, in particular the digital unit. The invention solves this problem by providing a paint spray gun with a mechanical lock for connecting the measuring unit, in particular the digital unit, to the paint spray gun body. The mechanical lock is designed to release the connection in the event of an impact force caused, for example, by the paint spray gun being dropped onto a hard surface. The mechanical lock is made, for example, from a plastic such that, when an impact force exceeds a threshold, it is elastically deformed so that the connection is released. This prevents or reduces damage to the measuring unit, in particular the digital unit. The measuring unit, in particular the digital unit, springs out of the mechanical lock and can thus be protected from excessive force.This has a positive effect on the service life of the spray gun and especially the measuring unit, especially the digital unit.

[0019] In one embodiment, the closure comprises a bayonet closure.

[0020] The term "bayonet lock" refers specifically to a twist-lock lock, in which locking and unlocking—in this case, mounting and intended removal of the measuring unit on the spray gun—are accomplished by rotation or opposite rotation. Mounting and removal preferably occurs by rotation, requiring little manual force. The bayonet lock is made of plastic, for example.

[0021] This allows the measuring unit, especially the digital unit, to be easily assembled and disassembled. The components of the bayonet lock are designed so that they can deform when subjected to an impact force, breaking the connection. In other words, the connection is released not by twisting, but by elastic deformation.

[0022] In one embodiment, the bayonet closure has at least two bayonet lugs arranged at the second interface and further has at least two bayonet recesses arranged at the first interface.

[0023] The term "bayonet lug" in this case refers to a projection located at the second interface and screwed into the bayonet recess. The bayonet lug, which is located in the bayonet recess, thus creates an undercut or a recessed grip. The undercut creates a positive connection between the measuring unit, in particular the digital unit, and the spray gun body. The bayonet recess in this case refers to a recess into which the bayonet lug is screwed. The bayonet lug and / or the bayonet recess can be made of plastic. Upon impact, the bayonet lug and / or the bayonet recess can be elastically deformed such that the connection is released.

[0024] In one embodiment, the bayonet recess is designed as a spring clip and / or formed by spring clips.

[0025] The spring clip refers to a shaped spring that has a recess into which the bayonet lug can be inserted and / or forms, in particular shapes, a recess into which the bayonet lug can be inserted. The spring clip can, for example, have a two-dimensional U-shape, with two short vertical elements and one horizontal element. The spring clip can be made of plastic or metal, e.g., spring steel. The spring clip can be formed in one piece from a metal wire, in particular bent. The spring clip allows for targeted elastic deformation upon application of an impact force, thereby releasing the connection between the paint spray gun and the measuring unit, in particular the digital unit.

[0026] This releases the connection, causing the measuring unit, especially the digital unit, to pop off the spray gun. In other words, the measuring unit, especially the digital unit, is not unscrewed from the bayonet lock. The impact load causes an elastic deformation of the spring clip, causing the bayonet lug to pop out of the bayonet recess and thus release the connection.

[0027] In one embodiment, the bayonet recess consists at least partially of a spring steel.

[0028] This allows the bayonet recess to be smaller, as spring steel has a higher modulus of elasticity than plastic. This results in a more compact design with the same functionality.

[0029] In one embodiment, a counter plate of the bayonet recess has a prism-shaped contour.

[0030] The term "counter plate" refers to the corresponding counterpart for the bayonet lug, which provides an undercut or a recess for locking or connecting. The counter plate corresponds to the horizontal element in the U-shaped recess. In this case, the horizontal element is prism-shaped. The prism-shaped contour positions the bayonet lug precisely in one direction when rotated. For example, an area above the bayonet lug at the second interface is guided in a preferred direction by the prism-shaped contour during rotation, ensuring that the bayonet lug is positioned correctly.

[0031] In this way, a directional positioning of the bayonet lug can be made possible.

[0032] In one embodiment, the bayonet lug has a prism-shaped contour.

[0033] By adjusting the contour of the bayonet lug, the necessary threshold for the impact force required to release the connection can be influenced. A prism-shaped contour makes it easier to release the connection with a bayonet lock by overbending, as the undercut or rear grip is smaller.

[0034] In one embodiment, the closure comprises a locking device. In one embodiment, the first interface comprises a locking device.

[0035] The locking device can comprise a locking projection and a corresponding groove. The locking device creates a defined locking point when the bayonet lock is rotated.

[0036] In this way, a resistance or click when locking into place can be communicated to the user so that they can assume that the connection is correctly installed.

[0037] In one embodiment, the first interface has a spring-loaded locking projection and the second interface has a corresponding groove.

[0038] The spring-loaded locking projection allows for easy opening and closing of the connection. This minimizes the impact on the functionality of the bayonet lock, allowing the connection to be released at will in the event of an impact.

[0039] In one embodiment, the impact force is a force acting horizontally on a side surface of the measuring unit, in particular the digital unit.

[0040] The measuring unit, in particular a digital unit, can be arranged above a handle on the paint spray gun body. The measuring unit, in particular a digital unit, has in particular one side on which the second interface is arranged. A display can be arranged on the opposite side. The vertical sides between the interface side and the display side in this case refer to the side surfaces. These are particularly exposed if the paint spray gun is dropped and are not protected by the contour of the paint spray gun, so they can potentially experience impact forces. The bayonet catch is designed such that only an impact force on one side surface leads to the connection being released. This is achieved by arranging the bayonet recesses in the direction of the side surfaces.

[0041] In this way, the closure, which is designed to release the connection when an impact force occurs, can be simplified by the bayonet closure.

[0042] In one embodiment, the connection is released when a threshold impact force is exceeded. The threshold refers to a limit value, above which the connection is released. If the threshold is exceeded, for example, the spring clip is deformed in such a way that the connection is released. The threshold is, in particular, one of the following: 15N, 20N, 25N, 30N, 35N, 40N, 45N, or 50N.

[0043] In this way, a threshold can be considered in the design of the mechanical shutter, depending on the sensitivity of the measuring unit, especially the digital unit. This threshold can be influenced, in particular, by the spring stiffness of the spring clip. The threshold can be influenced, in particular, by the material, geometry, and cross-section of the spring clip.

[0044] In one embodiment, the connection is released non-destructively.

[0045] The term "non-destructive release" here specifically means that the mechanical connection can be closed again after it has been released due to an impact force. In other words, the mechanical connection has not been broken as a result of the impact force. The digital unit can be reused on the same or a different spray gun. The spray gun can be reused with the same or a different digital unit.

[0046] This increases the robustness and service life of the paint spray gun.

[0047] In one embodiment, the paint spray gun comprises a sensor, wherein the measuring unit, in particular a digital unit, is configured to determine a physical quantity within the paint spray gun and / or in the environment based on a signal from the sensor. The measuring unit, in particular a digital unit, can further be configured to display the determined physical quantity on a display of the measuring unit, in particular a digital unit. The sensor can comprise one or more of the following: position sensor, motion sensor, inclination sensor, temperature sensor, pressure sensor, humidity sensor, light sensor, acceleration sensor, gyroscope sensor. The associated physical quantity can then be a temperature, pressure, humidity, position, movement, inclination, light signal, or acceleration. The sensor can be arranged, for example, in a paint flow channel or a compressed air flow channel.The sensor can, for example, detect material pressure and / or air pressure. The sensor can be configured, in particular, to detect a movement, a sequence of movements, a tap, an inclination, a gesture, or a covering of the paint spray gun and / or the measuring unit.

[0048] In one embodiment, the sensor is a pressure sensor. The pressure sensor is arranged in the measuring unit, in particular a digital unit, wherein the first interface has a valve configured to release an opening when the connection is present. When the connection is present, a closed space is formed between the released opening and the pressure sensor by the first interface and the second interface, so that the pressure sensor measures the pressure of the compressed air flow within the paint spray gun.

[0049] The first interface of the paint spray gun according to the invention can have at least one locking device. The locking device can comprise a locking projection. The locking projection can engage with a corresponding groove in the measuring unit. The locking device creates a defined locking point when the bayonet lock is rotated. The locking device ensures axial joining of the measuring unit to the interface.

[0050] The first interface of the paint spray gun according to the invention can have a fastening element that is arranged detachably or permanently on the paint spray gun body, wherein the at least one bayonet recess is arranged on the fastening element. The fastening element can, for example, comprise a cylindrical part that is inserted into a bore in the paint spray gun body. The fastening element can, for example, comprise a plate-shaped part that is encompassed from behind by spring clips and has the bayonet recess designed as a spring clip and / or formed by spring clips on the opposite side of the fastening element.

[0051] The fact that the measuring unit according to the invention, in particular a digital unit, has at least two bayonet lugs, wherein at least one surface of the at least two bayonet lugs facing the measuring unit comprises a slope and / or a curvature, has the advantage that the bayonet connection between the measuring unit and the spray gun body is more easily released upon the action of an impact force than would be the case with a non-sloped or non-curved surface. The slope or curvature runs in particular obliquely to the mounting direction of the measuring unit, in particular the digital unit.

[0052] A further aspect relates to the use of a first interface and a second interface in a paint spray gun described in more detail above.

[0053] A further aspect relates to the use of a measuring unit, in particular a digital unit, in a paint spray gun described in more detail above. A further aspect relates to the use of a sensor in a paint spray gun described in more detail above.

[0054] The features described above, including those from different embodiments, can also be combined with each other, resulting in synergistic interactions that go beyond the sum of the individual effects.

[0055] The invention is explained below using exemplary embodiments, which are described with reference to the following figures:

[0056] Figure 1 shows an exemplary paint spray gun according to the invention;

[0057] Figure 2 shows an exemplary first interface according to the invention;

[0058] Figure 3 shows an exemplary second interface according to the invention;

[0059] Figure 4 shows an exemplary sectional view of the mechanical connection; and

[0060] Figure 5 shows an exemplary exploded view of the mechanical connection.

[0061] Exemplary embodiments are described and explained below with reference to the figures listed above. Like reference symbols or analogous reference symbol structures refer to analogous or interacting components.

[0062] Figure 1 shows an exemplary paint spray gun 100 according to the invention. The paint spray gun 100 comprises a paint spray gun body 10. The paint spray gun body 10 is made of metal in the present case, but can also be made of plastic, and has a handle. In or on the paint spray gun body 10, for example, a needle valve for applying paint and an air valve for releasing compressed air, a compressed air connection, and a paint connection are arranged. The paint spray gun 100 further comprises an actuating bracket element 90. The actuating bracket element 90 is designed to be detachably connected to the paint spray gun body 10. By actuating the actuating bracket element 90, the needle valve for applying paint and the air valve for releasing compressed air are actuated. The paint spray gun 100 further comprises a measuring unit designed as a digital unit 30.The digital unit 30 is connected to the paint spray gun body 10 via a mechanical closure 60. For this purpose, the paint spray gun body 10 has a first interface 40. The digital unit 30 further has a second interface 50 corresponding to the first interface 40. In the present case, a sensor 20 is arranged in the digital unit 30. The sensor 20 is designed as a pressure sensor and is configured to measure a pressure within a flow channel, for example a compressed air flow, and to convert it into a signal. The digital unit 30 is configured to process the signal and determine the pressure. The digital unit 30 further has a display. The digital unit 30 is further configured to display the determined pressure. The mechanical closure 60 is configured to release the connection between the digital unit 30 and the paint spray gun body 10 when an impact force is applied.In this case, the mechanical closure 60 is particularly configured to release the connection when an impact force acts on a side surface 31 of the digital unit 30. In this case, the mechanical closure 60 is particularly configured to release the connection when the impact force exceeds a threshold of 40 Newtons.

[0063] Figure 2 shows an exemplary first interface 140 according to the invention. The mechanical closure 160 is designed as a bayonet closure. For this purpose, the first interface 140 has two bayonet recesses 163 and 164. The bayonet recesses 163 and 164 are designed as springs, in particular as spring clips, or are formed by spring clips. The springs are made of a metal, in particular spring steel. Corresponding bayonet lugs (not shown in Figure 2) engage in the bayonet recesses 163 and 164. The bayonet recesses 163 and 164 each have a counterplate 165. The counterplate 165 has a prism-shaped contour. The mechanical connection 160 also has a locking device 166. The locking device 166 comprises a spring-loaded locking projection 167 and a corresponding groove in the second interface (not shown in Figure 2).A valve 170, in this case a ball valve, is also arranged in the center of the first interface 140. Via this valve 170, the pressure sensor located in the digital unit can directly measure the pressure, e.g., the air pressure, within the spray gun body.

[0064] Figure 3 shows an exemplary second interface 250 according to the invention. The second interface 250 is arranged on the digital unit. The second interface 250 has the bayonet tabs 261 and 262. The bayonet tabs 261 and 262 have a prism-shaped contour. The second interface 250 has the groove 268, which is designed to engage with the spring-loaded locking projection 167 of the first interface 140. The bayonet tabs 261 and 262 are rotated into the corresponding bayonet recesses 163, 164 of the first interface 140 during assembly of the digital unit 30. This creates a mechanical connection, since the rotation causes the bayonet tabs 261, 262 to engage behind the bayonet recesses 163, 164.When mounting the digital unit 30 into the corresponding bayonet recesses 163, 164, the springs 163, 164 shown in Figure 2, in particular the spring clips, can initially deflect, in particular outward and / or away from the bayonet lugs 261 and 262. Upon further rotation of the digital unit 30, the springs 163, 164 move back toward the bayonet lugs 261 and 262 and engage behind them. Furthermore, the twisting causes the locking connection 166 to lock. When a shock load occurs on a side surface 31 of the digital unit 30, the bayonet recess 163 or 164, in particular the springs, are elastically deformed such that the bayonet tab 261 or 262 emerges or pops out of the corresponding bayonet recess 163 or 164. This prevents excessive force from being applied to the digital unit 30. This protects the digital unit 30, for example, if it is dropped.The surfaces of the bayonet lugs 261 and 262 facing the digital unit 30 each have a slope and / or a curvature.

[0065] Figure 4 shows a sectional view of the mechanical connection 360. The mechanical connection 360 in this case has a first interface 340 and a second interface 350. In this case, the ball valve 370 is shown in the first interface 340. The ball valve 370 closes or opens the opening 371, which is fluidically connected to a flow channel 373, in this case a compressed air flow channel, in the paint gun body 10. The mechanical connection 360 is shown in the connected state. The second interface 350 in this case rests on the first interface 340, with the bayonet lock 360 being engaged for this purpose. The second interface 350 forms a closed space with the first interface 340 in the connected state. In the connected state, the ball of the ball valve 370 is pressed downwards, so that the opening 371 is at least partially exposed.This creates the closed space between the opening 372 of the digital unit 30 and the flow channel 373. The opening 372 of the digital unit 30, in turn, is in contact with the pressure sensor (not shown). The area between the opening 372 of the digital unit 30 and the opening 371 is further sealed from the environment by a sealing ring 374. This makes it possible for the pressure sensor 20 in the digital unit 30 to measure the pressure within the paint spray gun 100, particularly in the flow channel 373.

[0066] Figure 5 shows an exploded view of the mechanical connection 160. The paint gun body 10 with the first interface 140 is designed to receive a fastening element 150. For this purpose, the paint gun body 10 has a recess at its rear end, into which the fastening element 150 is inserted and screwed in place using screws 151a, 151b. The bayonet lugs 261 and 262 shown in Figure 3 are screwed into the bayonet recesses 163, 164, which are designed as spring clips or formed by spring clips in the present case. The configuration shown in Figure 5 can be used in all embodiments of the paint gun 100 according to the invention.

[0067] Reference symbol

[0068] 10 spray gun bodies

[0069] 20 pressure sensor

[0070] 30 digital unit

[0071] 31 Side panel digital unit

[0072] 40, 140, 340 first interface

[0073] 50, 250, 350 second interface

[0074] 60, 160, 360 mechanical shutter / bayonet lock

[0075] 90 operating bracket element

[0076] 100 paint spray gun

[0077] 150 fastening element

[0078] 151a screw

[0079] 151b screw

[0080] 163, 164 bayonet recesses

[0081] 165 Counter plate

[0082] 166 locking device

[0083] 167 locking projection

[0084] 170, 370 valve, ball valve

[0085] 261 , 262 bayonet lug

[0086] 268 groove

[0087] 371 Opening valve

[0088] 372 Opening digital unit

[0089] 373 Flow channel in spray gun body

[0090] 374 sealing ring

Claims

Claims 1. A paint spray gun (100), comprising: a paint spray gun body (10); a measuring unit, in particular a digital unit (30); a first interface (40, 140, 340) on the paint spray gun body (10) for connecting the measuring unit, in particular a digital unit (30), to the paint spray gun body (10); a second interface (50, 250, 350) on the measuring unit, in particular a digital unit (30), which corresponds to the first interface (40, 140, 340); wherein the first interface (40, 140, 340) and the second interface (50, 250, 350) have a mechanical closure (60, 160, 360) configured to release the connection upon the action of an impact force.

2. Paint spray gun (100) according to claim 1, wherein the closure comprises a bayonet closure (60, 160, 360).

3. Paint spray gun (100) according to claim 2, wherein the bayonet closure (60, 160, 360) has at least two bayonet lugs (261, 262) arranged at the second interface (50, 250, 350) and at least two bayonet recesses (163, 164) arranged at the first interface (40, 140, 340).

4. Paint spray gun (100) according to claim 3, wherein the bayonet recess (163, 164) is designed as a spring clip (163, 164) and / or is formed by spring clips (163, 164).

5. Paint spray gun (100) according to claim 3 or 4, wherein the bayonet recess (163, 164) consists at least partially of a spring steel.

6. Paint spray gun (100) according to one of claims 3 to 5, wherein a counter plate (165) of the bayonet recess (163, 164) has a prism-shaped contour.

7. Paint spray gun (100) according to one of claims 3 to 6, wherein the bayonet lug (261, 262) has a prism-shaped contour.

8. Paint spray gun (100) according to one of the preceding claims, wherein the closure (60, 160, 360) comprises a locking device (166).

9. Paint gun (100) according to claim 8, wherein the first interface (40, 140, 340) has a spring-loaded locking projection (167) and the second interface (50, 250, 350) has a corresponding groove (268).

10. Paint spray gun (100) according to one of the preceding claims, wherein the impact force is a force acting horizontally on a side surface (31) of the measuring unit, in particular digital unit (30).

11. Paint spray gun (100) according to one of the preceding claims, wherein the connection is opened when a threshold of the impact force is exceeded.

12. Paint spray gun (100) according to one of the preceding claims, wherein the connection is released non-destructively.

13. A paint spray gun (100) according to any one of the preceding claims, wherein the paint spray gun (100) comprises a sensor (20) configured to perform a measurement of a physical quantity within the paint spray gun (100) and to convert the measured physical quantity into a signal; and wherein the measuring unit, in particular a digital unit (30), is configured to determine the physical quantity based on the signal and to display the determined physical quantity on a display.

14. Paint spray gun (100) according to one of the preceding claims, wherein the sensor is a pressure sensor (20) and is arranged in the measuring unit, in particular digital unit (30), and wherein the first interface (40, 140, 340) has a valve (170, 370) which is designed to release an opening (371) when the connection is present, and wherein when the connection is present between the released opening (371) and the pressure sensor (20) a closed space is formed by the first interface (40, 140, 340) and the second interface (50, 250, 350), so that the pressure sensor (20) measures the pressure of the compressed air flow within the paint spray gun (100).

15. Use of a first interface (40, 140, 340) and a second interface (50, 250, 350) in a paint spray gun (100) according to one of claims 1 to 14 and / or use of a measuring unit, in particular a digital unit (30), in a paint spray gun (100) according to one of claims 1 to 14 and / or use of a sensor (20) in a paint spray gun (100) according to one of claims 1 to 14.

16. Paint spray gun (100), comprising: a paint spray gun body (10); a first interface (40, 140, 340) on the paint spray gun body (10) for arranging a measuring unit, in particular a digital unit (30), on the paint spray gun body (10); wherein the first interface (40, 140, 340) comprises at least part of a bayonet catch (60, 160, 360), wherein the at least part of the bayonet catch (60, 160, 360) has at least one bayonet recess (163, 164), wherein the bayonet recess (163, 164) is designed as a spring clip (163, 164) and / or is formed by spring clips (163, 164).

17. Paint spray gun (100) according to claim 16, wherein the first interface (40, 140, 340) has at least one locking device (166).

18. Paint spray gun (100) according to one of claims 3 to 14, or 16 to 17, wherein the first interface (40, 140, 340) has a fastening element (150) which is arranged detachably or non-detachably on the paint spray gun body (10), wherein the at least one bayonet recess (163, 164) is arranged on the fastening element (150).

19. Measuring unit, in particular digital unit (30), for connection to a paint spray gun (100), wherein the measuring unit has at least two bayonet lugs (261, 262), wherein at least one surface of the at least two bayonet lugs (261, 262) facing the measuring unit comprises a slope and / or a curvature.

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