HOT AIR GUN

Abstract

A hot air gun includes a gun body, the gun body including a handle and a hand guard disposed at a front side of the handle, the gun body being provided with a hot air assembly and a temperature sensing arrangement, the hot air assembly including a heat generating assembly for generating hot air and a hot air tube for blowing the hot air towards a work area, the temperature sensing arrangement being configured to sense temperature of the work area, where the temperature sensing arrangement is rotatably connected to the hand guard, the hand guard is provided with a tuning element for tuning a sensing angle of the temperature sensing arrangement, and the tuning element extends towards the handle relative to the hand guard. The disclosure is mainly used to tune the temperature sensing arrangement via a single hand.

Claims

1. A hot air gun comprising: a gun body comprising a handle and a hand guard disposed at a front side of the handle, the gun body being provided with a hot air assembly and a temperature sensing arrangement, the hot air assembly comprising a heat generating assembly for generating hot air and a hot air tube for blowing the hot air towards a work area, the temperature sensing arrangement being configured to sense temperature of the work area, wherein the temperature sensing arrangement is rotatably connected to the hand guard, the hand guard is provided with a tuning element for tuning a sensing angle of the temperature sensing arrangement, and the tuning element extends towards the handle relative to the hand guard.

2. The hot air gun of claim 1, wherein the tuning element is movably connected to the hand guard, the temperature sensing arrangement abuts against an end portion of the tuning element, and the temperature sensing arrangement is connected to an elastic member which enables the temperature sensing arrangement to maintain a tendency of abutting against the tuning element.

3. The hot air gun of claim 2, wherein the end portion, which abuts against the temperature sensing arrangement, of the tuning element has a smooth curved surface.

4. The hot air gun of claim 2, wherein the temperature sensing arrangement is provided with a limiting groove within which the end portion of the tuning element moves.

5. The hot air gun of claim 2, wherein the temperature sensing arrangement is provided with a locating protrusion, the hand guard is provided with a locating groove oriented to face the locating protrusion, and two ends of the elastic member are located on the locating protrusion and in the locating groove, respectively.

6. The hot air gun of claim 2, wherein the temperature sensing arrangement is connected to the hand guard via a rotary shaft, and the elastic member refers to a torsional spring sleeved over the rotary shaft.

7. The hot air gun according to claim 2, wherein the tuning element is rotatably connected to the hand guard, a driving gear is provided on the tuning element, a driven gear is provided on the temperature sensing arrangement, the driven gear is engaged with the driving gear, and the tuning element rotates to bring the temperature sensing arrangement to rotate: or, the tuning element is in threaded-fit with the hand guard, and the tuning element moves axially to bring the temperature sensing arrangement to rotate: or, the tuning element is securely connected to the temperature sensing arrangement via a damping shaft and rotates synchronously relative to the hand guard, and the damping shaft is rotatably connected to the hand guard.

8. The hot air gun according to claim 1, wherein the hand guard is provided with an accommodation cavity for accommodating the temperature sensing arrangement, and the tuning element projects into the accommodation cavity to act on the temperature sensing arrangement: or the tuning element is provided on a rear side upper half portion of the hand guard and tilts upward.

9. The hot air gun according to claim 1, wherein the hot air tube has a central axis, a rotating plane of the temperature sensing arrangement and the central axis of the hot air tube being located on a same plane.

10. The hot air gun according to claim 1, wherein the temperature sensing arrangement is attached with a sighting probe for sighting a work area, the sighting probe being arranged parallel to the temperature sensing arrangement.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Hereinafter, the disclosure will be illustrated in further detail with reference to the accompanying drawings, in which

[0019] FIG. 1 is a structural schematic diagram of a hot air gun according to the disclosure:

[0020] FIG. 2 is a sectional view of the hot air gun when the temperature sensing arrangement rotates to a lowest position according to the disclosure:

[0021] FIG. 3 is a section view of the hot air gun when the temperature sensing arrangement rotates to a highest position according to the disclosure:

[0022] FIG. 4 is a structural schematic diagram of a temperature sensing arrangement and a tuning element in the hot air gun according to the disclosure:

[0023] FIG. 5 is a section view of a housing when the temperature sensing arrangement of the hot air gun rotates to the highest position according to the disclosure:

[0024] FIG. 6 is a section view of the housing when the temperature sensing arrangement of the hot air gun rotates to the lowest position according to the disclosure.

DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the disclosure more apparent, the technical solutions in the embodiments of the disclosure will be described in a clear and comprehensive manner: it is apparent that the example embodiments described herein are only part of the embodiments of the disclosure, not all of them.

[0026] The terms like first, second, third, and fourth (if existent) in the specification, claims, and drawings are used for distinguishing like objects, not necessarily used for describing a specific sequence or priority. It should be understood that features termed with such numerals may be replaced with each other in appropriate circumstances, such that the example embodiments of the disclosure described herein can be implemented in a sequence not illustrated or described here.

[0027] It will be understood that the terms comprise, include and have, as well as any of their variants, intent for a non-exclusive inclusion, e.g., a process, method, system, product, or apparatus comprising a series of steps or units are not necessarily limited to those steps or units explicitly limited herein, but may further include other steps or units not explicitly limited herein or inherent to such a process, method, product or apparatus.

[0028] It will be understood that in the disclosure, the term plurality refers to two or more. The term and/or only describes an association relationship of associated objects, which indicates that there may exist three relationships, e.g., X and/or Y may indicate three circumstances: X individually, or both X and Y together, or Y individually. The character / generally indicates a relationship of or between the former and latter associated objects. The term comprising (or including) X, Y, and Z or comprising (or including) X, Y, Z refers to comprising (or including) all of X, Y, and Z; the term comprising (or including) X, Y, or Z refers to comprising one of X, Y, and Z; the term comprising (or including) X, Y and/or Z refers to comply any one, or any two, or three of X, Y, and Z.

[0029] Hereinafter, the technical solution of the disclosure will be described in detail via specific example embodiments. The specific example embodiments as will be described below may be combined mutually or replaced with each other dependent on actual conditions: for same or similar concepts or processes, they may not be repeated in some example embodiments.

[0030] As illustrated in FIG. 1 through FIG. 6, a hot air gun according to the disclosure includes a gun body 1, the gun body 1 including a handle 11 and a hand guard 12 disposed at a front side of the handle 11, the gun body 1 being provided with a hot air assembly 13 and a temperature sensing arrangement 2, the hot air assembly 13 including a heat generating assembly 132 configured to generate hot air and a hot air tube 131 configure to blow the hot air towards a work area 5, the temperature sensing arrangement 2 being configured to sense temperature of the work area 5, where the temperature sensing arrangement 2 is rotatably connected to the hand guard 12, the hand guard 12 is provided with a tuning element 3 configured to tune a sensing angle of the temperature sensing arrangement 2, and the tuning element 3 extends towards the handle 11 relative to the hand guard 12.

[0031] In this example embodiment, the temperature sensing arrangement 2 is movably connected to the hand guard 12. Since the hand guard 12 is located at the front side of the handle 11 and the tuning element 3 extends towards the handle 11 relative to the hand guard 12, i.e., the tuning element 3 of the temperature sensing arrangement 2 is relatively proximal to the handle 11, in case of a need to tune the temperature sensing arrangement 2, the tuning element 3 may be directly tuned via a finger gripping the handle 11, whereby the temperature sensing arrangement 2 is effectively tuned and the temperature of the work area 5 can be sensed by the temperature sensing arrangement 2. This example embodiment enables single-handed tuning, facilitating tuning of the temperature sensing arrangement 2: in addition, by leveraging the tuning element 3 to tune the temperature sensing arrangement 2, the temperature sensing arrangement 2 can be always directed on to the work area 5, whereby sensing precision of the temperature sensing arrangement 2 may be enhanced, enabling the work area 5 to reach a specified temperature, and improving heating efficiency thusly. Moreover, the single-handed tuning facilitates the user to control the gun body 1 more stably, reducing potential occurrence of skewing of the gun body 1 during tuning of the temperature sensing arrangement 2, such that the work area 5 of the gun body 1 is maintained as uniformly heated as possible during tuning of the temperature sensing arrangement 2, whereby heating efficiency of the hot air gun is further improved.

[0032] As illustrated in FIGS. 2 and 3, in this example embodiment, the tuning element 3 is movably connected to the hand guard 12, the temperature sensing arrangement 2 abuts against an end portion of the tuning element 3, and the temperature sensing arrangement 2 is connected to an elastic member 23 which enables the temperature sensing arrangement 2 to maintain a tendency of abutting against the tuning element 3: by tuning the sensing angle of the temperature sensing arrangement 2 via the tuning element 3, the temperature sensing arrangement 2 can be directed on to the work area 5, further enhancing sensing precision of the temperature sensing arrangement 2; in addition, the elastic member 23 enables the temperature sensing arrangement 2 to maintain constantly abutting against the tuning element 3, further enhancing tuning precision of the temperature sensing arrangement 2.

[0033] As illustrated in FIG. 4, in this example embodiment, the end portion, which abuts against the temperature sensing arrangement 2, of the tuning element 3 has a smooth curved surface. Since the contact point between the tuning element 3 and the temperature sensing arrangement 2 will vary during rotating of the temperature sensing arrangement 2, the smooth curved configuration of the surface of the end portion, which abuts against the temperature sensing arrangement 2, of the tuning element 3 can ensure that the tuning element 3 maintains constantly abutting against the temperature sensing arrangement 2, and meanwhile reduces contact friction between the tuning element 3 and the temperature sensing arrangement 2, facilitating the end portion of the tuning element 3 to slide relative to the temperature sensing arrangement 2. It is noted that in this example embodiment, the end portion of the tuning element 3 refers to a semi-spherical shape.

[0034] As illustrated in FIG. 4, in this example embodiment, the temperature sensing arrangement 2 is provided with a limiting groove 22 within which the end portion of the tuning element 3 is moved, where the limiting groove 22 retains position of the end portion of the tuning element 3, which can effectively prevent skewing of the tuning element 3 due to rotation of the temperature sensing arrangement 2 and may also enable the temperature sensing arrangement 2 to be quickly directed on to the work area 5, further enhancing sensing precision of the temperature sensing arrangement 2.

[0035] In this example embodiment, a rotary shaft 24 is provided at both sides of the tuning element 3, respectively: the tuning element 3 is rotatably connected to the hand guard 12 via the rotary shaft 24; the tuning element 3 is in threaded-fit with the hand guard 12; the tuning element 3 abuts against the end portion of the temperature sensing arrangement 2: the tuning element 3 moves axially to bring the temperature sensing arrangement 2 to rotate. As illustrated in FIGS. 2 and 6, when the tuning element 3 moves axially to the uppermost position, the elastic member 23 lifts the temperature sensing arrangement 2 up to the highest position, at which point the temperature sensing arrangement 2 rotates to the lowest position about the rotary shaft 24; as illustrated in FIG. 3 and FIG. 5, when the tuning element 3 moves axially to the lowermost position, the tuning element 3 pushes the end portion of the temperature sensing arrangement 2 to move downward, causing the temperature sensing arrangement 2 to rotate about the rotary shaft 24 to the highest position: since the position where the tuning element 3 applies a force against the temperature sensing arrangement 2 is away from the rotary shaft 24, the temperature sensing arrangement 2 rotates more easily, and meanwhile the axial movement distance of the tuning element 3 may also be reduced, whereby the size of the tuning element 3 may be reduced: in addition, the threaded-fit between the tuning element 3 and the hand guard 12 enables stepless tuning of the temperature sensing arrangement 2, enhancing tuning precision of the temperature sensing arrangement 2, such that the temperature sensing arrangement 2 can be directed on to the work area 5 accurately, further enhancing sensing precision of the temperature sensing arrangement 2.

[0036] As illustrated in FIG. 4, in this example embodiment, the temperature sensing arrangement 2 is provided with a locating protrusion 21, where the hand guard 12 is provided with a locating groove 121 oriented to face the locating protrusion 21. In this example embodiment, the elastic member 23 is a compressed spring, where two ends of the elastic member 23 are located on the locating protrusion 21 and in the locating groove 121, respectively, whereby positions of both ends of the elastic member 23 are retained by the locating protrusion 21 and the locating groove 21, respectively, preventing the elastic member 23 from being detached from a pressed part, which enhances connection firmness between the elastic member 23 and the temperature sensing arrangement 2 and meanwhile ensures that the tuning element 3 can constantly abut against the temperature sensing arrangement 2, offering a more stable and reliable tuning of the temperature sensing arrangement 2. Of course, it will be understood that in alternative example embodiments, the elastic member 23 may also be a torsional spring sleeved over the rotary shaft 24.

[0037] As illustrated in FIG. 5 and FIG. 6, in this example embodiment, the hand guard 12 is provided with an accommodation cavity for accommodating the temperature sensing arrangement 2, where the tuning element 3 projects into the accommodation cavity to act on the temperature sensing arrangement 2. Since the temperature sensing arrangement 2 is disposed in the accommodation cavity, the hand guard 12 may play a protective role to the temperature sensing arrangement 2, which reduces possibility of accidental damages to the temperature sensing arrangement 2 and thus improves service life of the temperature sensing arrangement 2. It is noted that in this example embodiment, the tuning element 3 is disposed at the rear side upper half portion of the hand guard 12 and tilts upwardly, such that the tuning element 3 is more proximal to the user's thumb and index finger, facilitating the user to manipulate of the tuning element 3, offering a more convenient tuning of the temperature sensing arrangement 2: in addition, the user can implement tuning of the tuning element 3 only with the thumb and the index finger, resulting in a more stable control of the gun body 1 and reducing sway amplitude of the gun body 1: in this way, the work area 5 of the hot air gun is heated as uniformly as possible during the tuning process of the temperature sensing arrangement 2, whereby heating efficiency of this example embodiment is improved.

[0038] As illustrated in FIG. 2 and FIG. 3, in this example embodiment, the hot air tube 131 has a central axis 1311; the rotating plane of the temperature sensing arrangement 2 and the central axis 1311 of the hot air tube 131 are located on the same plane, such that an intersection point can be formed between the sensing direction of the temperature sensing arrangement 2 and the central axis 1311 of the hot air tube 131, such that the spacing between the intersection point and the hot air tube 131 is varied by rotating the temperature sensing arrangement 2, where when the intersection point is located in the work area 5, the temperature sensing arrangement 2 is directed on to the work area 5: in this example embodiment, the temperature sensing arrangement 2 can be quickly directed on to the work area 5, whereby tuning efficiency of the temperature sensing arrangement 2 is enhanced.

[0039] In this example embodiment, the temperature sensing arrangement 2 is attached with a sighting probe 4 for sighting the work area 5, where the sighting probe 4 is arranged parallel to the temperature sensing arrangement 2 and disposed as proximal as possible to the temperature sensing arrangement 2, such that the sighting probe 4 may accurately guide the user to direct the temperature sensing arrangement 2 on to the work area 5 via visible light: in this way, the temperature sensing arrangement 2 is quickly directed on to the work area 5, which further enhances tuning efficiency of the temperature sensing arrangement 2, thereby improving sensing accuracy of the temperature sensing arrangement 2. It is noted that the sighting probe 4 may adopt an infrared probe, as the infrared probe can emit clear visible light, which facilitates user observation and can further guide the user to direct the temperature sensing arrangement 2 on to the work area 5, thereby enhancing tuning efficiency of the temperature sensing arrangement 2.

[0040] In one example embodiment, a driving gear is provided on the tuning element 3, and a driven gear is provided on the temperature sensing arrangement 2, where the driven gear is engaged with the driving gear, such that the tuning element 3 brings the temperature sensing arrangement 2 to rotate: by toggling the driving gear to bring the temperature sensing arrangement 2 to rotate, single-fingered manipulation is enabled, which facilitates tuning of the temperature sensing arrangement 2: meanwhile, during the operation process, the user has a smaller finger motion amplitude, which further reduces sway amplitude of the hot air gun, such that the work area 5 of the hot air gun is heated as uniformly as possible during tuning of the temperature sensing arrangement 2; in this way heating efficiency of the hot air gun may be enhanced. Moreover, engagement between the driven gear and the driving gear offers a self-locking effect, such that when the temperature sensing arrangement 2 is directed on to the heating area 5, fitting between the driven gear and the active gear can effectively overcome the elastic force of the elastic member 23, enabling the temperature sensing arrangement 2 to maintain the tuned angle.

[0041] In another example embodiment, the temperature sensing arrangement 2 is provided with a damping shaft. The tuning element 3 is securely connected to the temperature sensing arrangement 2 via the damping shaft and rotates synchronously relative to the hand guard 12. Since the damping shaft is rotatably connected to the hand guard 12, when the user rotates the tuning element 3, the temperature sensing arrangement 2 is brought, via the damping shaft, to rotate. Provision of the damping shaft can effectively enhance anti-vibration property of the temperature sensing arrangement 2, causing the temperature sensing arrangement 2 secured more stably, which reduces potential occurrence of random skewing of the temperature sensing arrangement 2 and improves stability of the temperature sensing arrangement 2; in addition, the damping shaft is self-lockable, such that when the temperature sensing arrangement 2 is directed on to the work area 5, the damping shaft can effectively overcome the elastic force of the elastic member 23, enabling the temperature sensing arrangement 2 to maintain the tuned angle.

[0042] In addition to the example embodiments described above, the disclosure further has other embodiments, and all other embodiments derived by those skilled in the art based on the example embodiments described herein without exercise of inventive work fall into the scope of protection of the disclosure.