hot glue gun

Abstract

The invention relates to a hot glue gun (1) with a heating unit (2) for heating and at least partially liquefying a glue stick (3) so that a liquid adhesive (14) can be formed, and with a nozzle (4) through which the liquid adhesive (14) can exit. According to the invention, the hot glue gun (1) includes a return unit (5) by means of which the glue stick (3) can be at least partially retracted from the nozzle (4).

Description

[0001] The present invention relates to a hot glue gun with a heating unit for heating and at least partially liquefying a glue stick so that a liquid adhesive can be formed, and with a nozzle through which the liquid adhesive can exit.

[0002] A hot glue gun is known from EP 3 539 678 B1.

[0003] The object of the present invention is to prevent liquid adhesive from dripping from the nozzle of the hot glue gun when it is not in use.

[0004] The problem is solved by a hot glue gun having the features of the independent claim. Advantageous or preferred embodiments are each the subject of a corresponding dependent claim.

[0005] A hot glue gun is recommended. A hot glue gun can also be called a melting glue gun. It is used to bond materials by applying hot, liquid glue. It is a versatile tool used in various fields, including crafts and DIY projects, model making, repairs, and industrial manufacturing. In craft and DIY projects, for example, the hot glue gun allows for the quick and reliable bonding of materials such as paper, cardboard, fabric, and wood. In model making, it enables the assembly of model parts made of plastic, wood, or other materials.

[0006] Furthermore, the hot glue gun can be used for household repairs, such as fixing loose parts, filling cracks, or attaching decorations. In industrial manufacturing, it is used for packaging, cushioning, electronics assembly, and other applications where a fast and strong adhesive bond is required. Additionally, the hot glue gun is also used for attaching decorations and embellishments to various objects.

[0007] The hot glue gun includes a heating unit for heating and at least partially liquefying a glue stick, thus creating a liquid adhesive. The heating unit allows for efficient heating of the glue stick, resulting in a uniform and rapid liquefaction. This improves the adhesive performance and the handling of the hot glue gun.

[0008] Furthermore, the hot glue gun has a nozzle through which the liquid adhesive can be dispensed. The nozzle allows for very precise placement and / or metering of the liquid adhesive.

[0009] Furthermore, the hot glue gun includes a retraction mechanism that allows the glue stick to be at least partially retracted from the nozzle. This prevents liquid adhesive from leaking from the nozzle, particularly from the nozzle opening, after use or while the hot glue gun is not in use. Retracting the glue stick also retracts and / or moves the liquid adhesive back, thus preventing it from leaking from the nozzle. The retraction mechanism prevents dripping of the liquid adhesive, thereby increasing the cleanliness and precision of the work. This also reduces material waste and ensures greater cleanliness. The retraction mechanism can also be referred to as a return movement unit. It moves the glue stick back from the nozzle.

[0010] It is advantageous if the return mechanism can generate a restoring force that pushes and / or pulls the glue stick away from the nozzle. Generating this restoring force ensures reliable retraction and / or return movement of the glue stick, which increases the user-friendliness and efficiency of the hot glue gun.

[0011] Furthermore, it is advantageous if the return unit includes at least one tension and / or one compression unit by means of which the return force can be applied to the glue stick. The tension and / or compression unit provides a flexible and adjustable return force.

[0012] In an advantageous embodiment of the invention, the return unit comprises at least one spring element by means of which the return force can be generated on the glue stick. A spring element offers a cost-effective, compact, low-maintenance, and structurally simple solution for generating the return force, which increases the overall reliability of the hot glue gun. The spring mechanism enables a uniform and constant return force, so that no liquid adhesive escapes from the nozzle after use of the hot glue gun.

[0013] It is advantageous if the hot glue gun includes at least one holding unit that secures the glue stick, particularly in an axial direction. The holding unit ensures stable positioning of the glue stick, which increases accuracy and control when applying the liquid adhesive. The holding unit can also prevent the glue stick from falling out of the hot glue gun.

[0014] Furthermore, it is advantageous if the holding unit is movable in the axial direction of the hot glue gun. This axial movement allows the glue stick to be pressed towards the nozzle, causing the liquid adhesive to emerge. The holding unit and / or the glue stick can be subjected to pressure, for example, manually by pressing on the glue stick, and / or by means of a lever and / or actuation mechanism as described below. The holding unit can then be moved back, taking the glue stick with it. This return movement of the glue stick also draws the liquid adhesive along with it, preventing it from dripping from the nozzle.

[0015] Advantageously, the holding unit is movable from the retraction unit. This mobility of the holding unit by the retraction unit improves the overall functionality of the retraction mechanism, enabling more precise control of the gluing process. The retraction unit pushes the holding unit and the glue stick back and away from the nozzle using its restoring force, thus also retracting the liquid adhesive. This contributes to reducing adhesive waste and improving the quality of the work.

[0016] It is advantageous for the return force to act on the holding unit. This ensures that the glue stick is always pulled, pushed, and / or moved away from the nozzle. This increases the efficiency and reliability of the hot glue gun in daily use.

[0017] According to an advantageous embodiment of the invention, the reset unit is arranged between the holding unit and the heating unit and / or the housing of the hot glue gun. Arranging the reset unit in this position offers a compact, structurally simple, and efficient design. The reset unit is thus supported by the heating unit and / or the housing and can exert the restoring force on the holding unit.

[0018] Furthermore, it is advantageous if the holding unit is movable from the return unit. The movement of the holding unit by the return unit allows the glue stick, which is held by the holding unit, to be moved away from the nozzle.

[0019] Furthermore, it is advantageous if the hot glue gun includes a guide channel for the glue stick, preferably located within the housing. The guide channel ensures proper alignment and / or guidance of the glue stick, increasing precision and control during the gluing process. This reduces the likelihood of misuse and improves the efficiency of the hot glue gun.

[0020] Furthermore, it is advantageous if the guide channel includes an insertion opening through which the glue stick can be inserted. An insertion opening facilitates the insertion of the glue stick and contributes to user-friendly operation of the hot glue gun. This saves time and increases productivity, especially when frequently refilling the glue sticks.

[0021] It is advantageous if the holding unit is positioned within the guide channel of the hot glue gun. Positioning the holding unit within the guide channel ensures stable and precise guidance and / or secure holding of the glue stick, which improves the accuracy of the liquid adhesive application. This contributes to the quality and reliability of the adhesive bonds.

[0022] According to an advantageous embodiment of the invention, the reset unit is arranged in the guide channel. Positioning the reset unit in the guide channel enables a compact design and improves the efficiency of the reset mechanism. This contributes to reducing the overall size of the hot glue gun and makes it easier to handle.

[0023] Furthermore, it is advantageous if the holding unit is arranged in a recess in the guide channel and / or is movable. Arranging the holding unit in a recess provides additional support and stability for the holding unit and / or the adhesive stick, which increases the precision of the gluing process.

[0024] Advantageously, at least one initial axial stop is arranged in the guide channel and / or recess, limiting axial movement of the holding unit towards the insertion opening. This initial axial stop ensures that the holding unit does not move uncontrollably, thus improving precision and control during the bonding process.

[0025] It is advantageous if at least a second axial stop is arranged in the guide channel and / or recess, limiting axial movement of the holding unit towards the nozzle. The first and / or second axial stop holds the holding unit in the hot glue gun. The axial distance between the first and second axial stops determines the movement length of the holding unit.

[0026] Furthermore, it is advantageous if at least one of the holding units includes at least one barb. A barb on the holding unit provides additional grip and prevents the glue stick from slipping, thus increasing the precision of the gluing process. This contributes to the reliability and quality of the adhesive bonds. The at least one barb also allows the glue stick to be held securely in the hot glue gun.

[0027] Advantageously, the reset unit is positioned between the second axial stop and the holding unit. This positioning provides an effective reset mechanism, increasing precision and control during the gluing process.

[0028] It is advantageous if the retraction unit and / or the holding unit is designed as a ring element. The ring design allows for an even distribution of the retraction force, which increases precision and control during the gluing process. This contributes to the reliability and longevity of the hot glue gun.

[0029] Furthermore, it is advantageous if the nozzle includes a nozzle channel with a specific volume. The nozzle channel allows for precise control of the liquid adhesive, which improves the accuracy and quality of the adhesive bonds. This reduces the likelihood of misapplication and increases the efficiency of the hot glue gun.

[0030] Furthermore, it is advantageous to have a return volume in the guide channel, defined by the guide channel cross-section and the axial movement length of the holding unit, and where the return volume is less than or equal to the nozzle channel volume. This ensures that the liquid adhesive is not completely drawn through the nozzle to the heating unit, thus preventing air from entering the heating unit. Air in the heating unit acts as an insulator, preventing uniform and efficient melting of the adhesive stick.

[0031] Advantageously, a hot glue gun can include a temperature control unit, allowing the heating element temperature to be adjusted. This temperature control unit enables precise heating, ensuring optimal liquefaction of the glue stick. This reduces the risk of overheating and protects the materials, thus extending the lifespan of the hot glue gun.

[0032] It is advantageous if the temperature control unit includes a digital display that shows the current temperature of the heating element. A digital display provides the user with clear and accurate information about the current temperature, which simplifies the operation of the hot glue gun. This allows for immediate temperature adjustment and increases the efficiency and quality of the adhesive bonds.

[0033] Furthermore, it is advantageous if the hot glue gun has an automatic shut-off function that switches off the heating element after a certain period of inactivity. This automatic shut-off function saves energy and increases safety by preventing the hot glue gun from overheating. This also contributes to extending the lifespan of the heating element.

[0034] Furthermore, it is advantageous if the hot glue gun includes a handle, especially an ergonomically shaped one, which facilitates handling. The handle reduces user fatigue during extended use of the hot glue gun and increases comfort. This improves precision and control when applying the adhesive. A lever and / or an actuation mechanism may also be located in the handle area, which is used to push the glue stick towards the nozzle to dispense the liquid adhesive. The lever and / or actuation mechanism may resemble a trigger on a pistol, which can be pressed with the finger. The lever and / or actuation mechanism moves the holding unit that holds the glue stick towards the nozzle, thus also moving the glue stick towards the nozzle.

[0035] It is advantageous if the hot glue gun includes an LED work light that illuminates the work area. An LED work light improves visibility, which increases accuracy and precision during the gluing process. This is particularly useful in poorly lit environments and contributes to the quality of the glued joints.

[0036] Further advantages of the invention are described in the following exemplary embodiments. These show: Fig. 1 A schematic cross-sectional view of a hot glue gun with movable holding unit and return unit, Fig. 2 A schematic cross-sectional view of a hot glue gun with glue stick and liquid adhesive emerging from a nozzle, Fig. 3 A schematic cross-sectional view of a hot glue gun with glue stick and with the glue stick moved back by the return unit so that the escape of liquid adhesive from the nozzle is prevented and Fig. 4 A schematic cross-sectional view of a hot glue gun with a schematically represented nozzle channel volume and return volume.

[0037] The in Fig. The hot glue gun 1 shown in Figure 1 includes a heating unit 2. This heating unit 2 serves to heat and at least partially liquefy a glue stick 3. This allows a liquid adhesive 14 to be formed. The advantage of the heating unit 2 is that the glue stick 3 is heated efficiently and evenly, thus ensuring a consistent quality of the liquid adhesive 14.

[0038] Furthermore, the hot glue gun 1 includes a nozzle 4 through which the liquid adhesive 14 can be dispensed. The liquid adhesive 14 can be applied precisely using the nozzle 4, resulting in a clean and targeted bond.

[0039] The exemplary embodiment of the Fig. Figure 1 further shows that the hot glue gun 1 includes a return unit 5. This return unit 5 allows the glue stick 3 to be at least partially retracted from the nozzle 4. This prevents liquid adhesive 14 from escaping the nozzle 4, particularly the nozzle outlet 17, after use of the hot glue gun 1. The advantage of the return unit 5 is that it prevents the liquid adhesive 14 from dripping, thus avoiding contamination and material loss. The return unit 5 allows the glue stick 3 to be at least partially retracted, so that the melted glue stick 3, namely the liquid adhesive 14, is also retracted.

[0040] As can be seen from the exemplary embodiment of the Fig. As further shown in Figure 1, the return unit 5 can generate a return force 16. This return force 16 causes the glue stick 3 to be pushed and / or pulled away from the nozzle 4. The advantage of the return force 16 lies in the fast and reliable return of the glue stick 3, which increases the operational readiness of the hot glue gun 1.

[0041] Furthermore, the return unit 5 can have at least one tension and / or one compression unit by means of which the return force 16 can be applied to the glue stick 3. The advantage of these units is that they can be flexibly adjusted to achieve the optimal return force 16, which facilitates the operation of the hot glue gun 1.

[0042] According to Fig. The return unit 5 comprises at least one spring element 13, which can exert the return force 16 on the glue stick 3. The spring element 13 enables the function to be achieved in a structurally simple and reliable manner, whereby the return force 16 is provided constantly and without additional energy expenditure.

[0043] According to the present embodiment, the hot glue gun 1 comprises at least one holding unit 6. This holding unit 6 can hold the glue stick 3, particularly in an axial direction 10. The advantage of the holding unit 6 is that it holds the glue stick 3 securely and stably in position, which enables uniform melting and / or uniform application of the liquid adhesive 14. Furthermore, the holding unit 6 prevents the glue stick 3 from falling out.

[0044] In the Fig. Figure 1 shows that the holding unit 6 is movable in the axial direction 10 of the hot glue gun 1. The advantage of this axial movement 10 lies in the flexibility to move the glue stick 3 towards the nozzle 4 and / or away from it. The holding unit 6 allows the glue stick 3 to be moved towards and / or away from the nozzle 4. The holding unit 6 can, for example, be connected to a lever (not shown) and / or an actuating mechanism by means of which the holding unit 6, and thus the glue stick 3, can be pushed forward or towards the nozzle 4. This lever and / or actuating mechanism could, for example, be a trigger of the hot glue gun 1 or be coupled to it. The holding unit 6 allows the glue stick 3 to be subjected to a pressure force 15 to cause the liquid adhesive 14 to exit the nozzle 4.

[0045] Furthermore, as shown here, the holding unit 6 can be moved by the return unit 5. The advantage of this design is that the holding unit 6 is automatically moved back, thereby increasing the efficiency of the hot glue gun 1.

[0046] As in Fig. As can be seen from Figure 1, the restoring force 16 acts on the holding unit 6.

[0047] The in Fig. The embodiment shown in Figure 1 illustrates that the reset unit 5 is arranged between the holding unit 6 and the heating unit 2 and / or a housing 7 of the hot glue gun 1. As a result, the reset unit 5 can operate effectively without affecting the other components of the hot glue gun 1.

[0048] The hot glue gun 1 has according to Fig. 1 a guide channel 8. This guide channel 8 serves to guide the glue stick 3 and is preferably arranged in the housing 7. This allows the glue stick 3 to be guided precisely, resulting in uniform melting and application of the liquid adhesive 14.

[0049] The guide channel 8 includes an insertion opening 11 through which the glue stick 3 can be inserted into the guide channel 8. The advantage of the insertion opening 11 is that the glue stick 3 can be inserted into the hot glue gun 1 easily and quickly, which simplifies operation.

[0050] Furthermore, according to the present embodiment, the holding unit 6 is arranged in the guide channel 8 of the hot glue gun 1. This allows the holding unit 6 to hold the glue stick 3 securely and / or precisely in the guide channel 8, which improves the efficiency of the hot glue gun 1.

[0051] Furthermore, as can be seen here, the reset unit 5 is arranged in the guide channel 8. The advantage of this positioning is that the reset unit 5 can move the glue stick 3 directly back in the guide channel 8, which optimizes the operation of the hot glue gun 1.

[0052] According to Fig. 1. The holding unit 6 is arranged and / or movable in a recess 9 in the guide channel 8. This allows the holding unit 6 to be moved flexibly within the recess 9. Additionally or alternatively, the movement of the holding unit 6 can be limited to the recess 9. The holding unit 6 can then only move within the recess 9. Here, the recess 9 is larger, particularly in the axial direction 10, than the holding unit 6.

[0053] Likewise, according to the present embodiment, at least one first axial stop 19 is arranged in the guide channel 8 and / or in the recess 9. This first axial stop 19 limits the movement of the holding unit 6 in the axial direction 10 towards the insertion opening 11. The first axial stop 19 allows for precise limitation of the movement, which increases the positioning accuracy of the holding unit 6. Fig. 1 shows another first axial stop 19, which is located in the area of ​​the reset unit 5.

[0054] Furthermore, at least one second axial stop 20 is arranged in the guide channel 8 and / or in the recess 9. This second axial stop 20 limits the movement of the holding unit 6 in the axial direction 10 towards the nozzle 4. The holding unit 6 can also be reliably limited in its movement by the second axial stop 20. The first and second axial stops 19, 20 can thereby limit the recess 9 in the axial direction 10.

[0055] The in Fig. The embodiment shown in Figure 1 further illustrates that the holding unit 6 comprises at least one barb 12. The advantage of the barb 12 lies in the secure fixation of the glue stick 3, thus preventing it from falling out unintentionally. Furthermore, the glue stick 3 can be moved in a controlled manner in the axial direction 10 towards and / or away from the nozzle 4 by means of the at least one barb 12. According to the present embodiment, several barbs 12 are shown.

[0056] Furthermore, according to the present embodiment, the reset unit 5 is arranged between the second axial stop 20 and the holding unit 6. This allows the reset unit 5 to reliably reset and / or move back the holding unit 6.

[0057] Furthermore, the reset unit 5 and / or the holding unit 6 can be designed as a ring element. The advantage of the ring element design lies in its compact and / or robust construction, which increases the durability and reliability of the hot glue gun 1.

[0058] For the sake of simplicity, features already described in at least one preceding figure cannot be explained again. Furthermore, features may only be described in this figure or in at least one of the following figures. Additionally, for the sake of simplicity, the same reference symbols are used for identical features. Moreover, for the sake of clarity, not all features can be shown and / or labeled in the following figures. However, features shown in one or more of the preceding figures may also be present in this figure or in one or more of the following figures. Furthermore, for the sake of clarity, features may only be shown and / or labeled in this figure or in one or more of the following figures.Nevertheless, features that are only shown in one or more of the following figures may already be present in this or a preceding figure.

[0059] Fig. Figure 2 also shows the hot glue gun 1 with the glue stick 3, which is arranged in the guide channel 8. Each feature will not be discussed in detail here.

[0060] As can be seen from the exemplary embodiment of the Fig. As can be seen from Figure 2, the front part of the glue stick 3 is at least partially melted by the heating unit 2. The advantage of this melting is that the glue stick 3 is efficiently converted into a liquid state, thereby forming the liquid adhesive 14. Components can be bonded together using the liquid adhesive 14, for example.

[0061] The exemplary embodiment of the Fig. Figure 2 also shows that the liquid adhesive 14 emerges from the nozzle 4. Furthermore, the liquid adhesive 14 exits from the nozzle outlet opening 17, which provides a precise exit point for the liquid adhesive 14, thus ensuring a clean and controlled application of the liquid adhesive 14. This results in a clean working environment and reduces adhesive consumption, as less material is wasted.

[0062] According to Fig. 2. The liquid adhesive 14 exits the nozzle 4 by applying a pressure force 15 to the glue stick 3. The advantage of the pressure force 15 is that the glue stick 3 is reliably pushed through the guide channel 8, ensuring a continuous supply of liquid adhesive 14 to the nozzle 4. The pressure force 15 can be generated by manually pressing down on the glue stick 3 from behind. Alternatively, the hot glue gun 1 can also include a lever and / or an actuating mechanism with which the holding unit 6 can be subjected to the pressure force 15 to push the glue stick 3 towards the nozzle 4. The lever and / or the actuating mechanism can be in the form of a trigger on the hot glue gun 1, so that the lever and / or the actuating mechanism can be operated by gripping the hot glue gun 1 with the fingers.

[0063] Furthermore, the restoring force 16 acts in the opposite direction to the pressing force 15. To push the glue stick 3 towards the nozzle 4, the pressing force 15 must be greater than the restoring force 16. If the pressing force 15 is no longer applied, for example, because the lever and / or the actuating mechanism is no longer actuated, only the restoring force 16 acts after the application of the adhesive, and the glue stick 3 is moved back by the restoring unit 5 and / or by the restoring force 16 of the holding unit 6. As a result, the liquid adhesive 14 is also moved back, thus preventing unwanted dripping of the liquid adhesive 14. This contributes to cleanliness and safety in the workplace, as no hot drops of adhesive get onto the work surface or the user.

[0064] As can be seen from the exemplary embodiment of the Fig. As can be seen from Figure 2, the reset unit 5 is designed to generate the restoring force 16. The advantage of the reset unit 5 is that it increases the reliability and cleanliness of the hot glue gun 1 by preventing liquid adhesive 14 from escaping from the nozzle 4 after use.

[0065] The holding unit 6 is movably arranged in a recess 9 in the guide channel 8. The advantage of this mobility is that the holding unit 6 can flexibly react to the position of the glue stick 3, which facilitates the operation of the hot glue gun 1 and increases its adaptability to different glue stick sizes.

[0066] As in the Fig. As can be seen in Figure 1, the holding unit 6 rests against the first axial stop 19, so that the holding unit 6 cannot move further backwards or away from the nozzle 4. In the configuration shown here Fig. In contrast, the holding unit 6 is located at the second axial stop 20, so that the holding unit 6 cannot be moved further towards the nozzle 4.

[0067] Furthermore, the holding unit 6 has at least one barb 12. With the aid of the at least one barb 12, the pressure force 15 can be transmitted from the holding unit 6 to the glue stick 3, for example, when the pressure force 15 is transmitted to the holding unit 6 from the lever and / or the actuating mechanism. Furthermore, the restoring force 16 can be transmitted from the holding unit 6 to the glue stick 3 with the aid of the at least one barb 12.

[0068] The return unit 5 also includes the previously described spring element 13, which generates the return force 16. Here, the spring element 13 is compressed so that it generates the return force 16. The spring element 13 is located between the second axial stop 20 and the holding unit 6.

[0069] Finally, the restoring force 16 acts on the holding unit 6, as shown in Fig. Figure 2 shows the holding unit 6 being pushed away from the nozzle 4, thereby moving the glue stick 3 away from the nozzle 4.

[0070] Fig. Figure 3 shows the hot glue gun 1, where the pressure force is 15, which is in Fig. The force 2 that previously acted on the glue stick 3 is no longer present. Instead, only the restoring force 16 acts, which moves the glue stick 3 back from the nozzle 4. As a result, the liquid adhesive 14 is retracted, thus preventing unwanted dripping of the liquid adhesive from the nozzle 4.

[0071] The exemplary embodiment of the Fig. Figure 3 shows that the restoring force 16 alone is sufficient to move the glue stick 3 back to its starting position. The restoring force 16 causes the glue stick 3 to be moved back from the nozzle 4. The advantage of this restoring movement is that the liquid adhesive 14 is also retracted, thus reducing the risk of blockages or hardening in the nozzle area.

[0072] Furthermore, the reset unit 5 is according to Fig. 3 is designed in such a way that it provides a constant restoring force 16 which operates independently of external influences. This makes it possible to achieve a compact and structurally simple hot glue gun 1.

[0073] The in Fig. Figure 4 shows a schematic cross-sectional view of the hot glue gun 1, which includes a schematically represented nozzle channel volume 21 and a return volume 22.

[0074] According to the exemplary embodiment of the Fig.4. The return volume 22 can be less than or equal to the nozzle channel volume 21. The advantage of this design is that the liquid adhesive 14 can be effectively drawn back into the return volume 22, thus preventing unwanted dripping of the adhesive from the nozzle outlet opening 17. Furthermore, the liquid adhesive 14 is not drawn back so far that the nozzle channel 18 is completely emptied by being drawn entirely through the nozzle channel 18 into the area of ​​the heating unit 2. Because the return volume 22 is less than or equal to the nozzle channel volume 21, air is prevented from reaching the heating unit 2, as air has a strong insulating effect and thus impairs melting. Since the return volume 22 is less than or equal to the nozzle channel volume 21, liquid adhesive 14 always remains in the nozzle channel 18.As a result, heating unit 2 can operate continuously and efficiently, since there are no air pockets that could impair the melting process of the glue stick 3. This leads to even and reliable heating of the glue stick 3.

[0075] The nozzle channel volume 21 is formed by the volume of the nozzle channel 18. The return volume 22 is the product of the guide channel cross-sectional area or the cross-sectional area of ​​the guide channel 8 in the area of ​​the return unit 5 and the movement length of the holding unit 6 or the length by which the return unit 5 or the spring element 13 shown here is compressed. Reference symbol list 1 hot glue gun 2 heating units 3 glue sticks 4 nozzles 5 Reset unit 6 Holding unit 7 cases 8 guide channel 9 recess 10 Axial direction 11. Insertion opening 12 barbs 13 Spring element 14 Liquid adhesive 15 compressive force 16 Restoring force 17 Nozzle outlet opening 18 nozzle channel 19 first axial stop 20 second axial stop 21 Nozzle channel volume 22 reserve volume QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] EP 3 539 678 B1

[0002]

Claims

[1] Hot glue gun (1) with a heating unit (2) for heating and at least partially liquefying a glue stick (3) so that a liquid adhesive (14) can be formed, and with a nozzle (4) through which the liquid adhesive (14) can exit, characterized by , that the hot glue gun (1) includes a return unit (5) by means of which the glue stick (3) can be at least partially moved back from the nozzle (4). [2] Hot glue gun according to the previous claim, characterized by , that the return unit (5) can generate a return force (16) with which the glue stick (3) can be pushed and / or pulled away from the nozzle (4). [3] Hot glue gun according to one or more of the preceding claims, characterized by that the restoring unit (5) comprises at least a tension and / or a pressure unit by means of which the restoring force (16) can be applied to the glue stick (3). [4] Hot glue gun according to one or more of the preceding claims, characterized by , that the restoring unit (5) includes at least one spring element (13) by means of which the restoring force (16) can be formed on the glue stick (3). [5] Hot glue gun according to one or more of the preceding claims, characterized by , that the hot glue gun (1) comprises at least one holding unit (6) by means of which the glue stick (3) can be held, in particular in an axial direction (10). [6] Hot glue gun according to one or more of the preceding claims, characterized by , that the holding unit (6) is movable in the axial direction (10) of the hot glue gun (1). [7] Hot glue gun according to one or more of the preceding claims, characterized by , that the holding unit (6) is movable from the return unit (5). [8] Hot glue gun according to one or more of the preceding claims, characterized by, that the restoring force (16) acts on the holding unit (6). [9] Hot glue gun according to one or more of the preceding claims, characterized by , that the reset unit (5) is arranged between the holding unit (6) and the heating unit (2) and / or a housing (7) of the hot glue gun (1). [10] Hot glue gun according to one or more of the preceding claims, characterized by , that the holding unit (6) is movable from the return unit (5). [11] Hot glue gun according to one or more of the preceding claims, characterized by , that the hot glue gun (1) comprises a guide channel (8) for guiding the glue stick (3), wherein the guide channel (8) is preferably arranged in the housing (7). [12] Hot glue gun according to one or more of the preceding claims, characterized by , that the guide channel (8) includes an insertion opening (11) through which the glue stick (3) can be inserted into the guide channel (8). [13] Hot glue gun according to one or more of the preceding claims, characterized by , that the holding unit (6) is arranged in the guide channel (8) of the hot glue gun (1). [14] Hot glue gun according to one or more of the preceding claims, characterized by , that the reset unit (5) is arranged in the guide channel (8). [15] Hot glue gun according to one or more of the preceding claims, characterized by that the holding unit (6) is arranged in a recess (9) in the guide channel (8) and / or is movable. [16] Hot glue gun according to one or more of the preceding claims, characterized by , that at least a first axial stop (19) is arranged in the guide channel (8) and / or in the recess (9), which limits movement of the holding unit (6) in the axial direction (10) in the direction of the insertion opening (11). [17] Hot glue gun according to one or more of the preceding claims, characterized by, that at least a second axial stop (20) is arranged in the guide channel (8) and / or in the recess (9), which limits movement of the holding unit (6) in the axial direction (10) towards the nozzle (4). [18] Hot glue gun according to one or more of the preceding claims, characterized by that at least one holding unit (6) includes at least one barb (12). [19] Hot glue gun according to one or more of the preceding claims, characterized by , that the reset unit (5) is arranged between the second axial stop (20) and the holding unit (6). [20] Hot glue gun according to one or more of the preceding claims, characterized by that the reset unit (5) and / or the holding unit (6) is designed as a ring element. [21] Hot glue gun according to one or more of the preceding claims, characterized by , that the nozzle (4) comprises a nozzle channel (18) which has a nozzle channel volume (21), that a restoring volume (22) is arranged in the guide channel (8), which is defined by a guide channel cross-section and a maximum movement length of the holding unit (6) in the axial direction (10), and that the restoring volume (22) is less than or equal to the nozzle channel volume (21).

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