GLUE GUN

Description

[0001] The invention relates to a glue gun with a heating device for liquefying at least part of a hot melt adhesive, with a feed device for feeding the hot melt adhesive into the heating device, and with an operating device for actuating the feed device, wherein the operating device has an actuating lever with a manually operable trigger which is pivotally mounted about a rotation axis, and the rotation axis is aligned transversely or at right angles to the longitudinal direction of a guide track for the hot melt adhesive.

[0002] Such a glue gun is known from DE 20 2015 002 318 U1. The publication US 2003 / 150875 A1 shows a similar glue gun.

[0003] Glue guns, particularly hot-melt glue guns of the type mentioned above, can be used to glue a wide variety of objects. Using a trigger and / or manual trigger, an operator can activate a feed mechanism that moves the hot-melt adhesive into the heating device or feeds or pushes it into the heating device. In particular, the hot-melt adhesive is liquefied in the heating device and / or by means of the heating device. The hot-melt adhesive liquefied in the heating device can be discharged to the outside through a nozzle head of the glue gun.

[0004] Such a glue gun can have a substantially angular housing in a side view. The housing can have a first leg, in particular a nozzle leg, which accommodates the heating device for the hot melt adhesive and at one end of which an outlet nozzle and / or a nozzle head is arranged. A second leg, in particular a grip leg, can form a handle.

[0005] Glue guns of the type mentioned above are preferably hand-held and / or manually operated. For this purpose, the operating lever is pivoted around the rotation axis. The disadvantage of this is that prolonged use of the glue gun and / or repeated actuation of the operating lever can lead to operator fatigue.

[0006] The object underlying the invention is therefore to further develop a glue gun of the type mentioned above in such a way that operating comfort and / or ergonomics are improved. In particular, an alternative embodiment is to be provided.

[0007] The object underlying the invention is achieved with a glue gun of the type mentioned at the outset, wherein the axis of rotation intersects the guide track of the hot melt adhesive or is arranged on a side of the guide track facing away from the trigger of the operating device.

[0008] The advantage here is that the axis of rotation can be arranged at a greater distance from a trigger and / or a support surface of a trigger for the fingers of an operator. Preferably, the trigger and / or the support surface is a component of the operating device. The trigger and / or the support surface can be realized and / or formed by means of the actuating lever. In particular, a longer lever can be realized when actuating the operating device and / or the actuating lever. This can improve operability and / or ergonomics. In particular, the axis of rotation is defined as a virtual straight line around which the actuating lever rotates. Preferably, the axis of rotation is not provided as a materially formed axis of rotation that extends in the area of ​​the guide track and / or through the area of ​​the guide track. This avoids the guide track for the hot melt adhesive being blocked due to a materially formed axis of rotation.The hot melt adhesive can be in the form of a strand and / or a hot melt adhesive rod. In particular, the strand-shaped hot melt adhesive rod can be displaced along the guide track parallel to its longitudinal orientation.

[0009] The glue gun can have a handle, in particular with a manually operable trigger. During normal handling of the glue gun, the handle and / or the trigger can be arranged below the guide track for the hot melt adhesive, preferably as seen in a side view. The axis of rotation is preferably arranged in an area outside the handle. The axis of rotation can be arranged above the guide track in an area facing away from the handle. In particular, the axis of rotation is arranged to implement a transmission, wherein a movement of the trigger and / or of an end of the actuating lever facing the trigger can be translated into a larger movement of an end of the actuating lever facing away from the trigger. Preferably, a movement of the trigger in the area of ​​a support surface for an index finger of an operator can be translated into a larger movement of an end of the actuating lever facing away from the trigger.

[0010] The rotation axis is preferably realized by means of at least one pivot bearing. In particular, the pivot bearing is arranged in a lateral region next to and / or adjacent to the guideway. Thus, the pivot bearing can be positioned laterally next to the guideway. In particular, with respect to a cross-sectional view, the pivot bearing is arranged laterally to the guideway. In this case, the pivot bearing can be approximately at the level of the guideway and / or directly next to, in particular adjacent to, the guideway.

[0011] In particular, the guide track is defined as a region of the glue gun in which the hot melt adhesive and / or the feed device can be moved, displaced, or guided. In particular, the guide track is linear. The guide track can have a first open end for introducing the hot melt adhesive into the glue gun. In particular, a second end of the guide track facing away from the first end has an outlet opening, an outlet nozzle, and / or a nozzle head for the liquefied hot melt adhesive. The hot melt adhesive can preferably be guided through the region of the guide track, in particular within the glue gun and / or within a housing of the glue gun.

[0012] A first pivot bearing can be arranged in a first lateral region next to the guideway. In particular, a further and / or a second pivot bearing is arranged in a second lateral region facing away from the first lateral region next to the guideway. In particular, the two lateral regions are located laterally next to and / or adjacent to the guideway in relation to a cross-sectional view. Thus, by means of the at least one pivot bearing, the axis of rotation can be arranged in the region of the guideway of the hot-melt adhesive, without a materially formed axis of rotation extending through the region of the guideway itself. Preferably, the first pivot bearing and the second pivot bearing are spaced apart from one another. In particular, a receiving space is formed between the first pivot bearing and the second pivot bearing. Preferably, the receiving space, in particular viewed in the longitudinal direction of the axis of rotation, is between the first

[0013] The receiving space is arranged between the first pivot bearing and the second pivot bearing. In particular, the receiving space is designed to receive and / or guide the hot-melt adhesive. Thus, the hot-melt adhesive can be guided between the first pivot bearing and the second pivot bearing through the receiving space, in particular without contact.

[0014] According to a further embodiment, the actuating lever has at least one cranked, angled and / or bent deflection section. In particular, the deflection section of the actuating lever is guided past the area of ​​the guide track and / or around the area of ​​the guide track. Preferably, a receiving space for receiving and / or guiding through the hot melt adhesive and / or the feed device is formed by means of the at least one deflection section. This ensures that the hot melt adhesive and / or the feed device cannot be blocked in the area of ​​the guide track by the actuating lever and / or the at least one pivot bearing. Preferably, the deflection section is designed to allow the hot melt adhesive and / or the feed device to pass and / or allow it to pass along the guide track without contact.The deflection section can be substantially U-shaped, O-shaped, C-shaped, or J-shaped when viewed in cross-section and / or in the longitudinal direction of the guide track. For example, the deflection section can be fork-shaped to encompass the area of ​​the guide track and enable contactless passage of the hot melt adhesive and / or the feed device along the guide track. In particular, the rotation axis and / or at least one pivot bearing is arranged on the deflection section. The rotation axis can extend substantially transversely and / or at right angles to the deflection section.

[0015] According to a further development, the actuating lever has a first lever section, starting from the rotational axis, and a second lever section facing away from the first lever section. In particular, an end of the first lever section facing away from the rotational axis and / or the pivot bearing is connected to the feed device. Thus, the feed device can be actuated, moved, and / or displaced upon a displacement of the end of the first lever section facing away from the rotational axis and / or the pivot bearing. Preferably, the second lever section has a manually operable trigger. In particular, the second lever section is designed as a manually operable trigger. The second lever section can have a support surface for an operator's fingers for actuating the actuating lever and / or the operating device.Thus, a displacement of the second lever section via the rotation axis and / or the pivot bearing can be directly transferred to a displacement of the first lever section. In particular, the support surface for the operator's fingers is spaced apart from the rotation axis and / or the pivot bearing. Preferably, the distance of the support surface from the rotation axis and / or the pivot bearing is greater than 10 mm, greater than 20 mm, and / or greater than 30 mm.

[0016] Preferably, an end of a first lever section of the actuating lever facing away from the rotation axis and / or the pivot bearing, on the one hand, and a manually operable trigger of a second lever section of the actuating lever, on the other hand, are arranged in two mutually opposite regions next to the guide track. In particular, the arrangement of the two regions next to the guide track results from a cross-sectional view and / or a longitudinal view of the guide track. Preferably, the manually operable trigger and the feed device are arranged in two mutually opposite regions adjacent to the guide track. In particular, the actuating lever extends transversely to the longitudinal alignment of the rotation axis.

[0017] According to a further embodiment, the glue gun has a return element for automatically returning the operating device, the actuating lever and / or the feed device. In particular, the return element is designed as a compression spring. In detail, the return element can be designed as a compression spiral spring or as a compression helical spring. Compared to a tension spring, a compression spring can ensure longer-lasting functionality. In particular, the return element is arranged in an area between the feed device and the heating device. For example, the return element can be arranged in an area between the feed device and the actuating lever. In this case, the return element can be compressed upon actuation of the operating device and / or the actuating lever due to the resulting movement of the feed device.When the operating device and / or the actuating lever, in particular a manually operated trigger, is released, the compressed return element can move back to its original position and in doing so also move the feed device and the actuating lever back to their starting positions. In comparison to an arrangement of a return element in an area between the feed device and an end of the housing facing away from the heating device and / or the actuating lever, an arrangement in an area between the feed device and the heating device allows a return element with a flatter characteristic curve to be used. This allows for improved operability and / or ergonomics. Preferably, the return element causes and / or effects a maximum withdrawal force of less than 20 Newtons and / or less than 15 Newtons, in particular during an idle stroke without hot melt adhesive.In particular, the maximum pull-off force is in a range from 5 Newtons to 15 Newtons, preferably in a range from 8 Newtons to 12 Newtons. The maximum pull-off force, especially during an idle stroke without hot melt adhesive, can be in a range of approximately 10 Newtons. In particular, the maximum pull-off force results from maximum compression of the return element and / or maximum deflection of the actuating lever when the pull-off is actuated to move the feed device toward the heating device.

[0018] The return element is preferably designed for contactless passage of the hot melt adhesive. In particular, the return element can surround at least part of the guide track. As a result, the return element can be arranged and / or formed substantially concentrically to a longitudinal axis of the guide track. This can enable a compact and / or functional design. In particular, a first end of the return element is connected to the feed device. In this case, the first end of the return element can be movably mounted together with the feed device. A second end of the return element, facing away from the first end of the return element, can be held and / or fastened in a stationary manner. In particular, the second end of the return element is arranged in a stationary manner relative to a housing of the glue gun. Thus, the first end of the return element can be movable relative to the second end of the return element.This allows a force-storing function of the return element to be realized.

[0019] According to a further development, the feed device has a carriage and / or at least one driver for applying and / or carrying the hot melt adhesive. The driver can be claw-like. Preferably, the driver has a contact surface, wherein the contact surface can be claw-like. Upon actuation of the operating device, the driver and / or the contact surface can engage a side and / or a side section of the hot melt adhesive. The hot melt adhesive can be displaced in the direction of the heating device by means of the driver. The driver is preferably arranged on the carriage. The carriage can be displaceably mounted together with the driver, in particular in the longitudinal direction of the guide track.In particular, the driver and / or a first driver is arranged next to and / or adjacent to the guide track in an area facing away from a manually operable trigger of the operating device. A second driver can be arranged in an area facing away from the first driver, preferably next to and / or adjacent to the guide track. In particular, the first driver and the second driver are arranged opposite one another and / or facing one another. In particular with regard to a cross-sectional view and / or viewed in the longitudinal direction of the guide track, the first driver and / or the second driver is located in an area next to a guide track for the hot melt adhesive. The use of an adhesive gun according to the invention, in particular a hot melt glue gun, for liquefying a hot melt adhesive and / or for applying a liquefied hot melt adhesive to an adhesive area of ​​an object is particularly advantageous.In particular, the hot melt adhesive is designed in the form of a strand and / or as a hot melt adhesive rod. Due to the arrangement of the rotation axis and / or the pivot bearing in the area of ​​the guide track and / or at least one pivot bearing laterally next to the guide track, a greater leverage effect can be transferred from a manually operated trigger to the feed mechanism. This significantly reduces the force required by the operator. Compared to conventional glue guns, in which the rotation axis is positioned, for example, at approximately the height of an index finger when pulling the trigger, a force saving of up to 50% can be achieved using the solution according to the invention.

[0020] The invention is explained in more detail below with reference to the figures. They show: Fig. 1 a side view of a glue gun according to the invention, Fig. 2 a cross section of the glue gun according to the invention according to Fig. 1, and Fig. 3 a partially sectioned side view of the glue gun according to the invention according to Fig. 1 .

[0021] Fig. 1 shows a side view of a glue gun 10 according to the invention. The glue gun 10 is designed as a hot melt glue gun. Furthermore, the glue gun 10 has a housing 11. The housing 11 is essentially angular in side view. In this exemplary embodiment, the housing 11 is formed from a first housing half 12 and a further second housing half, not shown in detail here. The first housing half 12 and the second housing half are essentially mirror-symmetrical to one another. Because the second housing half is not present here, the internal structure of the glue gun 10 can be seen.

[0022] The glue gun 10 has a heating device 13 for liquefying at least a portion of a hot melt adhesive 14. The hot melt adhesive 14 is formed as a strand-shaped hot melt adhesive rod. The glue gun 10 has a feed device 15 with which the hot melt adhesive 14 can be fed to the heating device 13. Furthermore, the glue gun 10 has an operating device 16. The operating device 16 is connected to the feed device 15. As a result, the feed device 15 can be actuated by means of the operating device 16.

[0023] The substantially angular housing 11 essentially forms a first leg 17 and a second leg 18. In this embodiment, the heating device 13 and the feed device 15 are arranged in the first leg 17. The heating device 13 is connected to an outlet nozzle 19. Melt adhesive 14 liquefied in the heating device 13 can be discharged to the outside through the outlet nozzle 19. The second leg 18 of the housing 11 forms a handle 20 in this embodiment.

[0024] The operating device 16 has an actuating lever 21. The actuating lever 21 is mounted for rotation about a rotation axis 22. The rotation axis 22 is arranged in the region of a guide track 23 of the hot melt adhesive 14. In this exemplary embodiment, the guide track 23 for the hot melt adhesive 14 is linear. The guide track 23 extends from a first, open end 24 of the housing 11 to a second end 25 facing away from the first end 24. The second end 25 is formed by the outlet nozzle 19. The guide track 23 is thus the region of the glue gun 10 through which the hot melt adhesive 14 can pass.

[0025] The actuating lever 21 has a first lever section 26 and a second lever section 27. The first lever section 26 and the second lever section 27 extend from the rotational axis 22 in two directions facing away from one another. An end of the first lever section 26 facing away from the rotational axis 22 is connected to the feed device 15. In this exemplary embodiment, the connection between the first lever section 26 and the feed device 15 is articulated. The second lever section 27 extends from the rotational axis 22 outwards from the housing 11 and forms a manually operable trigger 28. The second lever section 27 or the trigger 28 has a support surface 29 on a side facing away from the handle 20. The support surface 29 serves for the partial placement of an operator's fingers. When the trigger 28 is pulled, the second lever section 27 is pivoted in the direction of the handle 20.

[0026] A return element 30 is arranged between the feed device 15 and the rotation axis 22. In this embodiment, the return element 30 is designed as a compression spring. An end of the return element 30 facing the feed device 15 is connected to the feed device 15. Thus, the end of the return element 30 facing the feed device 15 is movable together with the feed device 15. An end of the return element 30 facing away from the feed device 15 is fixedly mounted with respect to the housing 11.

[0027] A cross section FF is calculated using the following Fig. 2 explained in more detail.

[0028] Fig. 2 shows a cross section FF of the glue gun 10 according to the invention according to Fig. 1 In contrast to the Fig. 1 also a second housing part 31 in combination with the first housing part 12 to form the housing 11 is shown.

[0029] In this embodiment, the actuating lever 21 has a first deflection section 32 and a second deflection section 33. The first deflection section 32 and the second deflection section 33 are guided around the area of ​​the guide track 23.

[0030] The actuating lever 21 forms a receiving space 34. In this exemplary embodiment, the receiving space 34 is formed by the two deflection sections 32, 33. The receiving space 34 serves for the contactless receiving or guiding of the hot melt adhesive 14 along the guide track 23 for the hot melt adhesive 14. The axis of rotation 22 is arranged in the region of the guide track 23 for the hot melt adhesive 14. The axis of rotation 22, shown as a virtual axis according to the dashed line, is realized by means of a first pivot bearing 35 and a second pivot bearing 36. The first pivot bearing 35 and the second pivot bearing 36 are arranged laterally next to the guide track 23. The receiving space 34 is arranged between the first pivot bearing 35 and the second pivot bearing 36. The first pivot bearing 35 and the second pivot bearing 36 are thus spaced apart from one another in the longitudinal direction of the axis of rotation 22.By means of the two pivot bearings 35, 36, the actuating lever 21 is rotatably mounted about the axis of rotation 22 and in relation to the housing 11.

[0031] Fig. 3 shows a partially sectioned side view of the glue gun 10 according to the invention according to Fig. 1 . The feed device 15 is shown partially sectioned.

[0032] The feed device 15 has a carriage 37. The carriage 37 is mounted for displacement in the longitudinal direction of the guide track 23 or the hot melt adhesive 14. Furthermore, the feed device 15 has a driver 38. The driver 38 is pivotally mounted on the carriage 37. The driver 38 is connected by means of a transmission element 39 to an end of the first lever section 26 of the actuating lever 21 facing away from the rotation axis 22.

[0033] When the actuating lever 21 is actuated, the driver 38 is displaced such that a contact surface 40 of the driver 38 engages an outer side of the hot melt adhesive 14. In this embodiment, the contact surface 40 is claw-like.

[0034] Furthermore, when the actuating lever 21 is actuated, the carriage 37, together with the driver 40, is simultaneously displaced in the direction of the heating device 13. This moves the hot melt adhesive 14 in the direction of the heating device 13. A contact element 41 is connected to the carriage 37. The contact element 41 is arranged on a side facing away from the driver 38, next to the guide track 23 or the hot melt adhesive 14. The contact element 41 serves as a counterbearing for the driver 38.

[0035] In an alternative embodiment, a further movably mounted driver may be provided instead of the rigid abutment element 41. The driver 38 is arranged in a side region of the guide track 23 or the hot melt adhesive 14 facing away from the trigger 28 or the second lever section 27. List of reference symbols:

[0036] 10 Glue gun 11 Housing 12 First housing half 13 Heating device 14 Hot melt adhesive 15 Feed device 16 Operating device 17 First leg 18 Second leg 19 Outlet nozzle 20 Handle 21 Operating lever 22 Rotary axis 23 Guide track 24 First end 25 Second end 26 First lever section 27 Second lever section 28 Trigger 29 Support surface 30 Reset element 31 Second housing part 32 First deflection section 33 Second deflection section 34 Mounting space 35 First pivot bearing 36 Second pivot bearing 37 Slide 38 Driver 39 Transmission element 40 Contact surface 41 Contact element

Claims

1. Glue gun with a heating device (13) for liquefying at least a portion of a hot-melt adhesive (14), a feed device (15) for feeding the hot-melt adhesive (14) into the heating device (13), an operating device (16) for actuating the feed device (15), wherein the operating device (16) has an actuating lever (21) with a manually operable trigger (28) which is mounted pivotably about an axis of rotation (22), and the axis of rotation (22) is aligned transversely or at right angles to the longitudinal direction of a guide track (23) for the hot-melt adhesive (14), characterized in that the axis of rotation (22) intersects the guide track (23) of the hot-melt adhesive (14) or is arranged on a side of the guide track (23) facing away from the trigger (28) of the operating device (16).

2. Glue gun according to claim 1, characterized in that the axis of rotation (22) is implemented by means of at least one pivot bearing (35, 36), in particular the pivot bearing (35, 36) is arranged in a lateral region next to the guide track (23), preferably a first pivot bearing (35) is arranged in a first lateral region next to the guide track (23) and a second pivot bearing (36) is arranged in a second lateral region facing away from the first lateral region next to the guide track (23).

3. Glue gun according to claim 1 or 2, characterized in that the actuating lever (21) has at least one cranked, angled and / or bent deflection section (32, 33) which is guided past the region of the guide track (23) and / or around the region of the guide track (23), in particular the axis of rotation (22) and / or at least one pivot bearing (35, 36) is arranged on the deflection section (32, 33), preferably the deflection section (32, 33) is designed for contactless passage of the hot melt adhesive (14) and / or the feed device (15) along the guide track (23), in particular the deflection section (32, 33) is essentially U-shaped, O-shaped, C-shaped or J-shaped in cross-section.

4. Glue gun according to one of the preceding claims, characterized in that the actuating lever (21), starting from the axis of rotation (22) has a first lever section (26) and a second lever section (27) facing away from the first lever section (26), in particular, an end of the first lever section (26) facing away from the axis of rotation (22) is connected to the feed device (15), preferably the second lever section (27) has a manually operable trigger (28).

5. Glue gun according to one of the preceding claims, characterized in that an end of a first lever section (26) of the actuating lever (21) facing away from the axis of rotation (22) and a manually operable trigger (28) of a second lever section (27) of the actuating lever (21) are arranged in two regions facing away from one another next to the guide track (23), in particular the manually operable trigger (28) and the feed device (15) are arranged in two regions facing away from one another adjacent to the guide track (23).

6. Glue gun according to one of the preceding claims, characterized in that a return element (30) is provided for automatically returning the operating device (16), the actuating lever (21) and / or the feed device (15), in particular the return element (30) is designed as a compression spring, preferably the return element (30) is arranged in a region between the feed device (15) and the actuating lever (21).

7. Glue gun according to claim 6, characterized in that the return element (30) is designed for contactless passage of the hot-melt adhesive (14) and / or the return element (30) surrounds at least a part of the guide track (23), in particular a first end of the return element (30) is connected to the feed device (15) and / or is movable together with the feed device (15), preferably a second end of the return element (30) facing away from the first end is held stationary.

8. Glue gun according to one of the preceding claims, characterized in that the feed device (15) has a carriage (37) and / or at least one driver (38) for applying and / or taking the hot-melt adhesive (14), in particular a first driver (38) is arranged next to the guide track (23) in a region facing away from a manually actuatable trigger (28) of the operating device (16), preferably a second driver is arranged in a region facing away from the first driver (38).

9. Use of a glue gun (10) according to one of the preceding claims for liquefying a hot-melt adhesive (14), in particular a strand-shaped hot-melt adhesive stick (14), and / or for applying a liquefied hot-melt adhesive (14) to an adhesive area of an object.