Patent Application
20240240826
This application claims the benefit under 35 USC § 119 of Chinese Patent Application No. 202320124069X, filed on Jan. 17, 2023, in the China Intellectual Property Office, the entire disclosure of which is incorporated herein by reference for all purposes.
The subject matter described herein relates to a mechanical heating apparatus, and more particularly relates to a hot air gun.
A hot air gun, which is a multi-purpose tool for soldering and desoldering electronic components, includes a hot air assembly and a temperature sensing arrangement, where the hot air assembly is configured to produce hot air and blow the hot air towards a work area, whereby a heating function is enabled. In a conventional hot air gun, the temperature sensing arrangement senses the temperature of the hot air at an air outlet of the gun body, where temperature adjustment is implemented by an internal control system. However, due to temperature difference between the air outlet and the work area, the sensing result of the temperature sensing arrangement is not accurate enough.
In order to improve sensing precision of the temperature sensing arrangement, a novel hot air gun is disclosed in the Chinese invention patent No. CN108302764A, which includes a gun body, an infrared temperature sensor and a cantilever, a universal joint being mounted on the gun body via a fastening element, where the infrared temperature sensor is mounted on the universal joint via the cantilever, such that the infrared temperature sensor can be directed on to the work area of the hot air gun to sense the temperature; however, the patented hot air gun is inconvenient in tuning the infrared temperature sensor during the heating process as it requires involvement of both hands.
An objective of the disclosure is to provide a hot air gun to overcome inconveniences in tuning a temperature sensing arrangement, thereby enabling single-handed tuning of the temperature sensing arrangement.
To achieve the objective above, the disclosure provides a technical solution below: a hot air gun including 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, 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.
With the technical solution described above, the disclosure offers the following advantages:
In the disclosure, the temperature sensing arrangement is movably connected to the hand guard: since the hand guard is disposed at the front side of the handle and the tuning element extends towards the handle relative to the hand guard, i.e., the tuning element is more proximal to the handle, in case of a need to tune the temperature sensing arrangement, the tuning element may be directly tuned via a finger gripping the handle, whereby the temperature sensing arrangement is effectively tuned and the temperature of the work area can be sensed by the temperature sensing arrangement. This disclosure enables single-handed tuning, facilitating tuning of the temperature sensing arrangement; in addition, by leveraging the tuning element to tune the temperature sensing arrangement, the temperature sensing arrangement can be always directed on to the work area, whereby sensing precision of the temperature sensing arrangement may be enhanced, enabling the work area to reach a specified temperature, and improving heating efficiency thusly. Moreover, the single-handed tuning facilitates the user to control the gun body more stably, reducing potential occurrence of skewing of the gun body during tuning of the temperature sensing arrangement, such that the work area of the gun body is maintained as uniformly heated as possible during tuning of the temperature sensing arrangement, whereby heating efficiency of the hot air gun is further improved.
Furthermore, 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. With the technical solution described above, by tuning the sensing angle of the temperature sensing arrangement via the tuning element, the temperature sensing arrangement can be directed on to the work area, further enhancing sensing precision of the temperature sensing arrangement: in addition, the elastic member enables the temperature sensing arrangement to maintain constantly abutting against the tuning element, further enhancing tuning precision of the temperature sensing arrangement.
Furthermore, the end portion, which abuts against the temperature sensing arrangement, of the tuning element has a smooth curved surface. With this technical solution described above, since the contact point between the tuning element and the temperature sensing arrangement will vary during rotating of the temperature sensing arrangement, the smooth curved configuration of the surface of the end portion, which abuts against the temperature sensing arrangement, of the tuning element can ensure that the tuning element maintains constantly abutting against the temperature sensing arrangement, and meanwhile reduces contact friction between the tuning element and the temperature sensing arrangement, facilitating the end portion of the tuning element to slide relative to the temperature sensing arrangement.
Furthermore, the temperature sensing arrangement is provided with a limiting groove within which the end portion of the tuning element moves. With the technical solution described above, the limiting groove retains position of the end portion of the tuning element, which can effectively prevent skewing of the tuning element due to rotation of the temperature sensing arrangement and may also enable the temperature sensing arrangement to be quickly directed on to the work area, further enhancing sensing precision of the temperature sensing arrangement.
Furthermore, 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. With the technical solution described above, positions of both ends of the elastic member are retained by the locating protrusion and the locating groove, respectively, preventing the elastic member from being detached from a pressed part, which enhances connection firmness between the elastic member and the temperature sensing arrangement and meanwhile ensures that the tuning element can constantly abut against the temperature sensing arrangement offering a more stable and reliable tuning of the temperature sensing arrangement.
Furthermore, 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.
Furthermore, 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. With the technical solution described above, by toggling the driving gear to bring the temperature sensing arrangement to rotate, single-fingered manipulation is enabled, which facilitates tuning of the temperature sensing arrangement; 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 of the hot air gun is heated as uniformly as possible during tuning of the temperature sensing arrangement: in this way, heating efficiency of the hot air gun may be enhanced. Or, the threaded-fit between the tuning element and the hand guard enables stepless tuning of the temperature sensing arrangement, enhancing tuning precision of the temperature sensing arrangement, such that the temperature sensing arrangement can be directed on to the work area accurately, further enhancing sensing precision of the temperature sensing arrangement. Or, the tuning element brings, via the damping shaft, the temperature sensing arrangement to rotate, where the damping shaft can effectively enhance anti-vibration property of the temperature sensing arrangement, causing the temperature sensing arrangement secured more stably, which reduces potential occurrence of random skewing of the temperature sensing arrangement and improves stability of the temperature sensing arrangement.
Furthermore, 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. With the technical solution described above, since the temperature sensing arrangement is disposed in the accommodation cavity, the hand guard can play a protective role to the temperature sensing arrangement, which reduces possibility of accidental damages to the temperature sensing arrangement and thus improves service life of the temperature sensing arrangement.
Furthermore, 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. With the technical solution described above, an intersection point can be formed between a sensing direction of the temperature sensing arrangement and the central axis of the hot air tube, such that the spacing between the intersection point and the hot air tube is varied by rotating the temperature sensing arrangement, where when the intersection point is located in the work area, the temperature sensing arrangement is directed on to the work area: as such, the disclosure enables the temperature sensing arrangement to be quickly directed on to the work area, whereby tuning efficiency of the temperature sensing arrangement is enhanced.
Furthermore, 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. With the technical solution described above, the sighting probe may accurately guide the user to direct the temperature sensing arrangement on to the work area via visible light: in this way, the temperature sensing arrangement is quickly directed on to the work area, which further enhances tuning efficiency of the temperature sensing arrangement, thereby improving sensing accuracy of the temperature sensing arrangement.
Hereinafter, the disclosure will be illustrated in further detail with reference to the accompanying drawings, in which
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.
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.
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.
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.
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.
As illustrated in
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.
As illustrated in
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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
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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.
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.
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.
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.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202320124069X | Jan 2023 | CN | national |
