DE102022111223A1 - Hand printing device, method for operating a hand printing device, computer program and vehicle - Google Patents

Abstract

A hand printing device (10) is created for applying ink (11) to a surface (51) of a vehicle (50), the printing device (10) having a gripping element (12) for holding the printing device (10), a print head interface (18 ) for connecting to a print head (13) for applying an ink (11) supplied from a cartridge (14), a battery (16) for supplying electrical energy to the printing device (10) and a communication device (15) for wireless communication with an external device (50, 60, 70), wherein the printing device (10) is designed to receive shape information (20) regarding the shape (17) of the vehicle (10) via the communication device (15). Printing device (10) is designed to receive printing information (21) regarding the application of ink (11) via the communication device (15), and the printing device (10) is designed to control the print head (13) depending on the shape information ( 17) and the print information (21).

Description

The present invention relates to a hand printing device for applying ink to a surface of a vehicle and a method of operating the hand printing device. Additionally or alternatively, a computer program may be provided, the computer program containing instructions that, when the program is executed by a computer such as. B. the data processing unit is executed, causing the computer to at least partially execute the method. Additionally or alternatively, a computer-readable (storage) medium may be provided, the computer-readable medium containing instructions that, when executed by a computer, cause the computer to at least partially execute the method. The present disclosure is also directed to a vehicle.

A user of a vehicle tends to write messages on a surface of a vehicle, add stickers and decals to change and/or update the appearance of the vehicle over time. Vehicle wrappings such as B. Plastic films to change the color and appearance of the vehicle are well known. There is a consumer desire for self-expression and customization of their beloved vehicle and a consumer interest in digital technology and the integration of intelligent devices and applications.

Hand pressure devices use digital technology and can be used to customize a vehicle. Hand printing devices are known from the prior art. A printing device is a device designed to apply ink to a surface in order to print on the surface. A hand printing device is a printing device that can be operated and/or controlled by the user's hand. Thus, a hand printing device is a user-operated device capable of producing a graphic effect such as. B. Color, gradient, graphics, text, messages, patterns, texture, etc., especially on the surface of a vehicle.

WO 2012/038446 A1 discloses a dynamically movable hand-held surface spraying device having at least one nozzle means for ejecting a spray material onto a target surface, a memory containing desired spray data predefined and contained in a digital image or CAD model stored in the memory, a spatial reference unit for To reference the spray device in space, a computing means to automatically control the ejection by the nozzle control mechanism according to the information obtained from the spatial reference unit and according to the desired spray data.

US 2015/0042716 A1 discloses a method and system for printing an object.

EP 3 680 849 A1 discloses a skin printer and a user client. The user client transfers at least one image to the skin printer so that the skin printer can output the image. The skin printer and the user client may be connected to each other through a network or a short-range wireless communication method.

The aim is to achieve a user-friendly and effective change in the appearance of the vehicle. For example, modifying an appearance may be enhanced by a visual and/or graphical effect including aspects such as a color, gradient, graphic, text, message, pattern, texture, etc.

In view of this prior art, the present invention is based on the object of creating a device or a method which is suitable for at least overcoming the above-mentioned disadvantage of the prior art.

The task is solved by the features of the independent claim. The dependent claims relate to preferred developments of the invention.

More specifically, the object is achieved by a hand-held printing device for applying ink to a surface of a vehicle. The printing device includes a gripping member for holding the printing device, a printhead interface for connecting to a printhead for applying an ink supplied from a cartridge, a battery for supplying electrical power to the printing device, and a communication device for wirelessly communicating with an external device, wherein the printing device is configured to receive shape information regarding the shape of the vehicle via the communication device, the printing device is configured to receive printing information regarding the application of the ink via the communication device, and the printing device is configured to control the print head depending on the Control shape information and print information.

The printing device includes the printhead interface for connecting to the printhead, e.g. b. an inkjet print head. The printhead may be connected to a cartridge designed to deliver ink. The printing device may be configured to print one or more ink cartridges in various colors and appearances such as: B. metallic, transparent, opaque, luminous, temperature-sensitive, etc. The printhead allows the printing device to print an optional temporary ink or color onto an exterior or interior surface of the vehicle. The surface of the vehicle can be one or more body panels, windows, panels, tires, lights, etc.

The printing device is an electronic, battery-operated and wirelessly connectable device and can be held in the hand by means of the gripping element and operated by a user of the printing device in a user-friendly manner.

The printing device is configured to receive shape information relating to the shape of the vehicle via the communication device. The shape information is information about the 3D geometry of the vehicle, the surface of the vehicle and/or a section thereof. This means that the shape information can include data from a digital model of the vehicle, a so-called digital twin. The shape of the vehicle defines the printable surface. Therefore, the printing device does not need to scan the vehicle to detect the shape and/or other features of the printing surface. This enables improved positioning accuracy and user-friendliness.

The printing device is designed to receive printing information regarding the application of ink via the communication device. The print information is information about printing and/or controlling the print head. The printing information may include information about how the print head is controlled to print a particular color.

The printing device is designed to control the print head depending on the shape information and the printing information. In other words, the printing device combines the shape information and the printing information to control the print head to apply ink. The shape information can define where to print and the print information can define what should be printed. This allows the ink, e.g. B. digital illustrations can be designed exactly to the geometry, size and/or shape of the vehicle surface. Graphical effects specific to the shape of the vehicle may be applied and utilize the shape of the vehicle to, for example, emphasize a vehicle and/or surface feature, adjust and/or distort a graphic, create a visual effect, e.g. B. perspective and/or anamorphic. In addition, there is no need for live 3D scanning of the vehicle surface because the pressure is controlled by digital twin data. The printing device can be used for vehicle tailoring, vehicle repair, scratch removal, etc.

Preferred implementations of the method are described in detail below.

The ink can be a temporary ink. Thus, the printhead interface is designed to be connected to a printhead capable of printing temporary ink. The ink may fade over a period of time. Additionally or alternatively, the ink can be washed off. For example, the ink can be washed off with water, with soap, with a release agent, with rain and/or with a car wash. The release agent may contain a bio-based solvent and/or enzyme that activates the release or removal of the ink/paint. Temporary and/or water-soluble ink/paint can be removed using an environmentally friendly release agent, cleaner, surfactant, etc. that does not contain harmful solvents. This allows the appearance of a consumer's vehicle that they have purchased or leased to be adjusted to change the appearance after 1-3 years or more, e.g. B. after a leasing period.

The communication device can be designed to communicate wirelessly with a communication interface of the vehicle, a user terminal and/or an external server. The communication device may be an interface for communicating with the vehicle, the user terminal and/or the external server via a specific standard and/or via a specific protocol. The user terminal and the printing device may be connected such that the user terminal provides a user interface for the printing device. A user can make inputs to control the printing device via the user interface of the user terminal. An output about a state, a function and/or a control of the printing device and/or about surfaces of the vehicle that have already been printed can be perceivable to a user via the user interface. Similarly, the vehicle and the printing device may be connected such that the vehicle provides a vehicle user interface for the printing device. The external server can be from a vehicle The manufacturer and/or a provider are provided with information about the shape of the vehicle in order to provide shape information and/or to provide pressure information. The external server can provide a cloud service. The appearance of the vehicle, including pre-applied paint, may be a digital communication between the user interface (app) and the vehicle, e.g. B. appears on the central information display, augmented reality glasses and/or virtual reality glasses.

The printing device may include a location measuring device to capture location information regarding the relative position of the communication device with respect to the vehicle. The location information can enable more reliable printing. The location of the printing device may be measured and/or referenced relative to the digital 3D geometry of the vehicle as provided by the shape information. The location measuring device can be a camera, an inertial measurement unit (IMU) and/or a radio frequency (HF)-based measuring device, e.g. B. an ultra-wideband measuring device (UWB measuring device). Data fusion is possible to place the device relative to the vehicle's 3D digital surface geometry.

The location measuring device can be designed to determine the location of predetermined reference objects. This can further improve the positioning of the printing device and improve print quality. The location measuring device can measure physical aspects of the vehicle such as: B. Use bodywork, surface edges, surface creases/shape, body paneling, door handles, badges and/or window markings to provide additional location information. A reference object can be invisible or partially invisible to the naked eye of a user. A reference object, such as a reference point, may be added to the surface of the vehicle during the manufacturing or finishing process of the vehicle parts. Additionally or alternatively, a reference object can alternatively be placed on an optionally transparent film, which is then applied to the vehicle surface. A reference object can also be ink that has already been applied to the surface of the vehicle. Ink that has already been applied can be identified by a camera and/or by data relating to a digital twin of the vehicle, e.g. B. be provided by the user terminal and / or the external server using print data.

The communication device may be designed to fuse shape information and location information. This enables a holistic approach to consider the exact configuration of the vehicle including vehicle options, color and equipment based on data from the location measuring device and the shape information provided by the vehicle. The fusion may be based on the location information and the user interface, a QR code, an NFC tag, a vehicle identification number (VIN), and/or an RF device such as. B. based on a UWB device, a Bluetooth device, a WiFi device. Additionally or alternatively, the communication device can be designed to send location information via the communication device. For example, location information may be sent to a user terminal and/or an external server to fuse shape information and location information.

The printing device may be designed to control the application of color depending on the location information and/or the shape information. The printing device can detect the position of the printing device relative to the vehicle and the vehicle surfaces and control the print head accordingly.

The print head can be replaceable. Thus, the printhead interface can be designed to be reversibly connected to the printhead. This allows for user-friendly changing of the print head and prevents the print head from clogging after repeated use and/or aging and does not require cleaning. In a further embodiment, the printing device and the print head can be formed in one piece and the cartridge can be replaceable and/or refillable.

The printing device may include a spacer designed to limit the minimum distance between the print head and the vehicle. This can achieve print quality by allowing a well-defined distance to be maintained between the print head and the vehicle surface. The printing device may include a housing formed by the gripping member, and the spacer member may be disposed on the housing and/or an outer surface thereof.

Furthermore, a method for operating the hand-held printing device for applying ink to a surface of a vehicle is specified. The method includes: receiving shape information regarding the shape of the vehicle; receiving printing information regarding ink application; Controlling a print head to apply an ink provided by a cartridge depending on the shape information and the print information. The process steps may be carried out in an order other than that specified. For example, the step of receiving shape information regarding the shape of the vehicle and the step of receiving print information regarding the application of ink may be performed interchangeably and/or simultaneously.

Furthermore, what was said above with regard to the hand printing device also applies mutatis mutandis to the method for operating the hand printing device and vice versa.

Furthermore, a computer program includes instructions which, when the program is executed by a computer, cause the computer to at least partially carry out the method described above.

The program can contain any program code. The above description regarding the hand printing device and the method applies mutatis mutandis to the computer program and vice versa.

Furthermore, a computer-readable medium contains instructions that, when executed by a computer, cause the computer to carry out at least part of the method described above.

The computer-readable medium may be any digital data storage device such as a USB flash drive, hard drive, CD-ROM, SD card, or SSD card. The computer program described above may be stored on the computer-readable medium. However, the computer program does not necessarily have to be stored on such a computer-readable medium, but can also be obtained via the Internet.

In addition, the above description regarding the hand printing device, the method and the computer program applies mutatis mutandis to the computer-readable (storage) medium and vice versa.

Furthermore, a vehicle is created. The vehicle has a communication interface for communicating with the hand pressure device. The vehicle may include a vehicle user interface for performing inputs to control the printing device. An output about a state, a function and/or a control of the printing device and/or about surfaces of the vehicle that have already been printed can be perceivable to a user via the vehicle user interface. Additionally or alternatively, the vehicle has a charging interface for charging a battery of the hand-held printing device. Additionally or alternatively, the vehicle includes a compartment designed to store the hand printing device. The printing device can be connected to the vehicle for charging and/or data exchange. The data exchange can include a software update, connecting the printing device to the vehicle, downloading vehicle configuration information, etc.

The vehicle can be an automobile such as. B. be a car. The vehicle can be automated. The automated vehicle can be designed to at least partially and/or temporarily take over the lateral and/or longitudinal guidance during the automated driving of the automated vehicle. A control unit of the vehicle can be designed to at least partially control the automated driving. The vehicle can be a vehicle with autonomy levels 1 to 5.

Furthermore, the above description regarding the hand pressure device also applies mutatis mutandis to the vehicle and vice versa.

• 1 zeigt schematisch eine Handdruckvorrichtung gemäß einer Ausführungsform der Erfindung, wobei die Handdruckvorrichtung mit einer externen Vorrichtung kommunizieren kann;
• 2 zeigt eine schematische Ansicht eines Anwenders, der eine Handdruckvorrichtung gemäß einer Ausführungsform der Erfindung bedient;
• 3 zeigt eine weitere schematische Ansicht eines Anwenders, der eine Handdruckvorrichtung gemäß einer Ausführungsform der Erfindung bedient; und
• 4 zeigt ein Ablaufdiagramm des Verfahrens zum Betreiben einer Handdruckvorrichtung gemäß einer Ausführungsform der Erfindung.

An embodiment is described below with reference to 1 until 4 described.

• 1 shows schematically a hand printing device according to an embodiment of the invention, wherein the hand printing device can communicate with an external device;
• 2 shows a schematic view of a user operating a hand printing device according to an embodiment of the invention;
• 3 shows another schematic view of a user operating a hand printing device according to an embodiment of the invention; and
• 4 shows a flowchart of the method for operating a hand printing device according to an embodiment of the invention.

Embodiments are described below with reference to 1 until 4 described, wherein the same reference numerals are used for the same objects throughout the description of the figures, and wherein the embodiment is merely a specific example for implementing the disclosure and does not limit the scope of the disclosure as defined by the claims.

1 shows schematically a hand printing device 10 according to an embodiment of the invention. The hand printing device 10 can communicate with an external device 50, 60, 70.

The printing device 10 has a gripping element 12 for holding the printing device 10. The gripping element 12 provides a housing for the printing device 10. The gripping element 12 can be made of plastic and/or contain plastic.

The hand printing device 10 is designed to apply an ink 11 to a surface 51 of a vehicle 50 (see 2 and 3 ). The printing device 10 includes a printhead interface 18 for connecting to a printhead 13 for applying the ink 11 supplied by a cartridge 14. The print head 13 is replaceable. The print head 13 is combined with the ink cartridge 14. When cartridge 14 is replaced, printhead 13 is replaced and vice versa.

The printing device 10 has a battery 16 for supplying electrical energy to the printing device 10. The battery 16 may be rechargeable and/or replaceable. The battery 16 is a storage device for electrical energy that can be supplied to the printing device 10.

The printing device 10 has a communication device 15 for wirelessly communicating with the external device 50, 60, 70. The communication device 15 is designed to wirelessly communicate with a communication interface 53 of the vehicle 50, a user terminal 60 and an external server 70.

The printing device 10 is equipped with a suitable wireless data protocol, e.g. B. UWB, Bluetooth, WiFi, NFC and / or a mobile network, via the communication device 15 with the vehicle 50 and the user terminal 60 connectable. The printing device 10 is equipped with a suitable wireless data protocol, e.g. B. via a mobile network, such as EDGE (3G), LTE (4G), 5G and / or 6G, via the communication device 15 with the external server 70 connectable. The communication device 15 may include one or more sub-elements (not shown) that may provide the ability to communicate via various wireless data protocols.

The user terminal 60 provides a user interface 61. The vehicle 50 provides a vehicle user interface 56. The user interface 61 and the vehicle user interface 56 can provide an app. The printing device 10 can be connected to the app. A virtual version of the vehicle 50, i.e. H. a digital twin, may be in the vehicle 50 through the vehicle user interface 56, the user interface 61 and/or elsewhere, e.g. B. in social media, a web presence, AR/VR glasses, a digital projection e.g. B. recorded and/or displayed on an interior surface.

The printing device 10 is designed to receive shape information 20 relating to the shape 52 of the vehicle 10 via the communication device 15. The shape information 20 may include design CAD data and/or data used in the design and/or manufacturing process of the vehicle 50. The shape 52 may characterize the contour of the surface 51 of the vehicle. The shape information 20 may include information about printable and non-printable portions of the surface 51. A non-printable portion of surface 51 may include a window, a mirror, and/or a lamp.

The printing device 10 is designed to receive printing information 21 regarding the application of ink 11 via the communication device 15. The print information 21 may include data related to a visual and/or graphical effect including a color, a gradient, a graphic, a text, a message, a pattern, a texture. The printing information 21 may include information about ink 11 that has already been applied. Information about applied ink 21 can be transmitted from the printing device 10 to an external device 50, 60, 70 via the communication device 15. The applied ink information 21 may be used to create and/or update a digital twin of the vehicle 50.

The printing device 10 is designed to control the print head 13 depending on the shape information 17 and the print information 21. The printing device 10 fuses the shape information 17 and the printing information 21 to apply ink 11 accordingly.

The printing device 10 includes a location measuring device 19 for detecting location information 22 regarding the relative location of the communication device 15 with respect to the vehicle 10. The printing device 10 is designed to control the application of ink 11 depending on the location information 22 and the shape information 20 . The shape information 20, pressure information 21, and location information 22 may enable the ability to begin painting at any point on the vehicle surface 51, as the printing device 10 prints according to the position of the printing device 10.

The location measuring device 19 may be designed to detect the surface type, the surface position and/or the vehicle position. This allows the printing device 10 to print on any surface 51 in a coordinated manner, e.g. B. to print a color, pattern, texture and/or graphic field that is larger than the printing device 10 with a single pass of the printing device 10 or multiple passes of the printing device 10.

The location measuring device 19 can be a camera such as. B. have RGB, IR, UV, Lidar; be designed to perform point cloud scanning; be designed to triangulate a UWB signal, similar to how the current system works for smartphone access; and/or an inertial measurement unit, IMU, to provide location information 22 that includes information regarding the position and orientation of the printing device 10 in space or relative to aspects of the vehicle 50.

The location measuring device 19 is designed to detect surfaces 51 that have already been printed. The printing device 10 can “stitch” larger prints or multiple passes of the printing device 10 together. The printing device 10 may additionally incorporate image correction to allow a printed graphic to be modified, adjusted, and/or distorted to adjust the graphic between previously printed areas.

The location measuring device 19 is designed to measure the position of predetermined reference objects 23 (see 2 ) to determine. Optionally, the vehicle 50 can have a grid or grid-like reference objects 23, ie registrations that are not visible to the naked eye. The reference objects 23 can be painted, printed and/or marked on the vehicle 50 so that the reference objects 23 can respond to incident light with a wavelength that is not visible to the human eye, e.g. B. infrared light, IR light, and / or or ultraviolet light, UV light. The printing device 10 and/or the location measuring device 19 can comprise a light-emitting device (not shown) which is designed to emit light in order to make the reference objects 23 visible and/or readable for the printing device 10. The reference object 23 can be read by the location measuring device 19. The printing device 10 can recognize certain areas of the surface 51 and prevent and/or restrict printing on the areas for safety reasons. Such areas could refer to a window and/or a light.

The communication device 15 is designed to merge shape information 20 and location information 22. In a further embodiment, the communication device 15 is designed to send location information 22 via the communication device 15.

The printing device 10 has a spacer element 17 which is designed to limit the minimum distance between the print head 13 and the vehicle 50. The spacer 17 may include a non-damaging protective contact surface (not shown) designed to contact the surface 51 of the vehicle 50. The contact surface is designed to preserve and/or not damage the surface 51 and its appearance. The spacer 17 may be formed by means compatible with the hard, shiny surfaces 51 of the vehicle 50, e.g. B. through soft, low-friction pads, e.g. B. felt, fabric, slide over the surface 51 of the vehicle 50. Additionally or alternatively, the spacer element 17 can have rubber elements connected by a joint, e.g. B. rubber balls that can rotate freely in any direction and are designed to allow non-damaging movement of the printing device 10 over the surface 51 of the vehicle.

The vehicle 50 has a communication interface 53 for communicating with the hand-held printing device 10, a charging interface 54 for charging the battery 16 of the hand-held printing device 10, and a compartment 55 designed to store the hand-held printing device 10. The compartment 55 can be a glove compartment or an armrest. The charging interface 54 can be arranged within the compartment 50. Thus, the printing device 10 can be loaded and stored in the compartment 50.

2 shows a schematic view of a user 80 operating a hand printing device 10 according to an embodiment of the invention.

The user 80 uses the hand printing device 10 as described with reference to 1 is described to apply ink 11 to a surface 51 of a vehicle 50, as described with reference to 1 is described. 2 is made with reference to 1 described.

The user 80 can digitally paint the vehicle 50 by waving the printing device 10 around like a magic wand. When the user 80 moves the printing device 10 relative to the vehicle 50, the printing device 10 detects the movement of the printing device 10 and applies ink 11 accordingly. The surface 51 has a reference object 23, which can be an edge of the vehicle 50. The surface 51 includes a painted surface, a glass surface and/or a plastic surface. When ink 11 is applied, the printing device 10 may transmit information regarding the application of ink 11 to an external device 50, 60, 70 to create and/or update a digital twin of the vehicle 50.

3 shows another schematic view of a user 80 operating a hand printing device 10 according to an embodiment of the invention.

The user 80 uses the hand printing device 10 as described with reference to 1 is described to apply ink 11 to a surface 51 of a vehicle 50, as described with reference to 1 is described. The user 80 uses a user terminal 60 as described with reference to 1 is described. 3 is made with reference to the 1 and 2 described.

The user terminal 60 provides a user interface 61. The user terminal 60 may be a cell phone, a tablet, a handheld computer, a computer, and/or any intelligent device. The user terminal 60 can be connected to a cloud-based service on the external server 70. The user 80 can download, customize and/or create graphic effects or messages to capture, modify and/or create print information 21 for printing on the vehicle. The printing device 10 is designed to physically connect directly to the user terminal 60, e.g. B. “dock to the device”. The user interface 61 creates a desirable and user-friendly experience.

The user 80 can use the user interface 61 to select preset graphics, download new graphics, and/or create graphics and/or messages. The automaker may provide graphics of famous artists, celebrities and/or employees. A subscription service that is updated with new graphics effects that can be added to the vehicle 50 by the user 80.

The user interface 61 displays a digital twin of the vehicle 50. The digital twin is a cloud-based virtual/digital version of a specific vehicle configuration associated with the vehicle 50. By identifying the vehicle 50, e.g. B. by a vehicle identification number, VIN, a machine-readable barcode, e.g. B. a QR code and / or an application clip, a digital identification via Bluetooth, WiFi, UWB, the configuration of the vehicle 50 can be determined and the 3D geometry of the vehicle 50 to the user interface 61 via a cloud service, as provided by provided to the external server 70. This allows an interactive user interface 61 (app) to interactively create, manipulate, place and visualize the graphics live/in real time before and during printing on the vehicle 50.

In an embodiment not shown, the vehicle user interface 56 may be designed to have the features described above with reference to the user interface 61 of the user terminal 60.

4 shows a flowchart of the method 100 for operating a hand printing device 10 according to an embodiment of the invention.

The method 100 is a method 100 for operating the hand printing device 10, as described with reference to 1 until 3 is described.

The method 100 includes receiving 110 shape information 20 regarding the 17 of the vehicle 10.

The method 100 includes receiving 120 print information 21 regarding the application of ink 11.

The method 100 includes controlling 130 a print head 13 to apply an ink 11 supplied by a cartridge 14 depending on the shape information 17 and the print information 21.

List of reference symbols

10

Hand pressure device

11

ink

12

Gripping element

13

Printhead

14

cartridge

15

Communication device

16

battery

17

Spacer element

18

Printhead interface

19

Location measuring device

20

Shape information

21

Print information

22

Location information

23

Reference object

50

External device, vehicle

51

surface

52

shape

53

Communication interface

54

Charging interface

55

compartment

56

Vehicle user interface

60

External device, user terminal

61

User interface

70

External device, external server

80

user

100

Proceedings

110

Receiving shape information

120

Receiving printing information

130

Controlling the print head

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 2012038446 A1 [0004]
• US 20150042716 A1 [0005]
• EP 3680849 A1 [0006]

Claims (11)

Hand printing device (10) for applying ink (11) to a surface (51) of a vehicle (50), the printing device (10) having: - a gripping element (12) for holding the printing device (10), - a printhead interface (18) designed to connect to a printhead (13) for applying an ink (11) supplied by a cartridge (14), - a battery (16) for supplying electrical energy to the printing device (10), and - a communication device (15) for wireless communication with an external device (50, 60, 70), wherein - the printing device (10) is designed to receive shape information (20) regarding the shape (52) of the vehicle (10) via the communication device (15), - the printing device (10) is designed to receive printing information (21) regarding the application of ink (11) via the communication device (15), and - The printing device (10) is designed to control the print head (13) depending on the shape information (17) and the printing information (21). Hand pressure device (10). Claim 1 , wherein the communication device (15) is designed to communicate wirelessly with a communication interface (53) of the vehicle (50), a user terminal (60) and / or an external server (70). Hand pressure device (10). Claim 1 or 2 , wherein the printing device (10) has a location measuring device (19) for detecting location information (22) regarding the relative location of the communication device (15) in relation to the vehicle (10). Hand pressure device (10). Claim 3 , wherein the location measuring device (19) is designed to determine the location of predetermined reference objects (23). Hand pressure device (10). Claim 3 or 4 , wherein the communication device (15) is designed to merge shape information (20) and location information (22) and / or to send location information (22) via the communication device (15). Hand printing device (10) according to one of the Claims 3 until 5 , wherein the printing device (10) is designed to control the application of ink (11) depending on the location information (22) and / or the shape information (20). Hand printing device (10) according to one of the preceding claims, wherein the print head (13) is replaceable. Hand printing device (10) according to one of the preceding claims, wherein the printing device (10) has a spacer element (17) which is designed to limit the minimum distance between the print head (13) and the vehicle (50). Method (100) for operating a hand printing device (10) for applying ink (11) to a surface (51) of a vehicle (50), the method (100) comprising: - Receiving (110) shape information (20) regarding the shape (17) of the vehicle (10); - Receiving (120) printing information (21) regarding the application of ink (11); - Controlling (130) a print head (13) for applying an ink (11) supplied by a cartridge (14) depending on the shape information (17) and the print information (21). Computer program and/or computer-readable storage medium containing instructions which, when the program or instruction is executed by a computer, cause the computer to carry out the method and/or the steps of the method Claim 9 to carry out. Vehicle (50), comprising: a communication interface (53) for communicating with the hand printing device (10) according to one of the Claims 1 until 8th , a charging interface (54) for charging a battery (16) of the hand printing device (10) according to one of Claims 1 until 8th and/or a compartment (55) designed to hold the hand printing device (10) according to one of Claims 1 until 8th to keep.

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