Variable diameter hot air gun nozzle

Abstract

This utility model belongs to the field of hot air gun technology, specifically relating to a variable diameter hot air gun nozzle, comprising: a nozzle body, multiple first blades, and multiple adjusting components. One end of the nozzle body is detachably mounted on the air outlet of the hot air gun. An adjusting ring is fitted around the nozzle body and threadedly connected to the nozzle body. Multiple first blades are arranged in a ring array on the other end of the nozzle body, forming a second air outlet. The first and second air outlets form an air duct, and each first blade is rotatably connected to the nozzle body. The number of adjusting components is the same as the number of first blades. The adjusting components are rotatably mounted on the nozzle body, with one end connected to the adjusting ring and the other end connected to a first blade. This utility model achieves adjustable nozzle diameter by moving an adjusting block along the axial direction of the nozzle body to rotate the first blades relative to the nozzle body, thereby adjusting the diameter of the second air outlet. The adjustment is simple and quick.

Description

Technical Field

[0001] This utility model relates to the field of hot air gun technology, and in particular to a variable diameter hot air gun nozzle. Background Technology

[0002] A hot air gun uses hot air to weld or remove components. A hot air gun typically consists of a blower motor and a heating unit. When the blower motor starts, the heating unit begins to heat, which generates a hot airflow. The hot airflow is concentrated or diffused through a nozzle or nozzle accessory to achieve the purpose of welding or removing components.

[0003] Existing hot air guns have fixed nozzles and nozzle accessories of fixed size, and the applicable component area is also fixed. When switching from nozzles and nozzle accessories applicable to a large area to nozzles and nozzle accessories applicable to a small area, it is necessary to disassemble the current nozzles and nozzle accessories and wait for them to cool down before using them. This results in low work efficiency and poses a safety risk of accidental burns during use. Utility Model Content

[0004] The technical problem to be solved by this utility model is: in order to solve the technical problem that the nozzle diameter of the hot air gun cannot be changed in the prior art, this utility model provides a variable diameter hot air gun nozzle, and the nozzle diameter of the hot air gun is adjustable.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a variable diameter hot air gun nozzle, which includes: a nozzle body, one end of the nozzle body is detachably installed at the air outlet of the air gun, a first air outlet is opened inside the nozzle body, and an adjusting ring is sleeved on the outside of the nozzle body, and the adjusting ring is threadedly connected to the nozzle body.

[0006] Multiple first blades are arranged in a ring array on the other end of the nozzle body. The multiple first blades surround to form a second air vent. The first air vent and the second air vent form an air duct. Each first blade is rotatably connected to the nozzle body.

[0007] Multiple adjustment components are provided, the number of which is the same as the number of the first blades. The adjustment components are rotatably mounted on the nozzle body. One end of the adjustment component is connected to the adjustment ring, and the other end of the adjustment component is connected to the first blade. The adjustment ring moves axially along the nozzle body to drive the first blade to rotate relative to the nozzle body, thereby adjusting the diameter of the second air outlet.

[0008] The specific technical effect is that by moving the adjusting block along the axial direction of the nozzle body to drive the first blade to rotate relative to the nozzle body, the diameter of the second air outlet can be adjusted, thus realizing the adjustable nozzle diameter of the hot air gun, which is simple and quick to adjust.

[0009] Furthermore, each of the aforementioned adjustment components includes a connecting rod and an adjustment block. One end of the connecting rod is connected to the adjustment ring, and the other end of the connecting rod is rotatably connected to the adjustment block. The lower end of the adjustment block is rotatably connected to the nozzle body, and the upper end of the adjustment block is connected to the first blade.

[0010] Furthermore, each end of the connecting rod is provided with an open spherical locking hole, and the two open spherical locking holes are connected by a hollow groove. The adjusting block and the adjusting ring are both provided with spherical buckles that cooperate with the open spherical locking holes. The spherical buckle of the adjusting block is rotatably locked into one of the open spherical locking holes, and the spherical buckle of the adjusting ring is rotatably locked into the other open spherical locking hole.

[0011] Furthermore, the adjusting ring includes a seat and a first nut, both of which are fitted onto the outside of the nozzle body. One end of the adjusting assembly is connected to the seat. The outer wall of the seat is provided with a trapezoidal convex ring, and the inner wall of the first nut is provided with a trapezoidal concave ring that mates with the convex ring. The first nut is threadedly connected to the nozzle body. The specific technical effect is that the trapezoidal convex ring on the outer wall of the seat and the trapezoidal concave ring on the inner wall of the first nut cooperate with each other, forming a stable relative connection between the seat and the first nut in the axial direction. When the first nut rotates threadedly around the nozzle body, due to its axial connection with the seat, the movement of the first nut along the axial direction of the nozzle body reliably drives the seat to move synchronously along the axial direction. The adjusting assembly then converts the up-and-down movement of the seat into rotation of the first blade relative to the nozzle body, thereby adjusting the diameter of the second air outlet and achieving adjustable nozzle diameter for the hot air gun.

[0012] Furthermore, a guide protrusion is provided on the outer wall of the nozzle body, extending axially along the nozzle body, and a guide groove is provided on the inner wall of the ring seat to cooperate with the guide protrusion. The specific technical effect is that the cooperation between the guide protrusion and the guide groove ensures the stability of the ring seat's movement, thereby guaranteeing the accuracy of the hot air gun nozzle caliber adjustment.

[0013] Furthermore, one end of the nozzle body has several claws, which are spaced apart around the nozzle body. A first groove is formed between adjacent claws, and a first thread is provided on the outer wall of each claw. A second nut is fitted over the claws, and the inner diameter of the second nut gradually decreases axially away from the first blade. The specific technical effect is that by fitting the claws over the air gun outlet and utilizing the engagement of the second nut with the first thread on the claws, as the second nut tightens, the gradually decreasing inner diameter of the nut exerts a squeezing effect on the claws. The spaced claws have a certain elastic deformation capacity, and under compression, they contract inward, thus tightly clamping the air gun outlet and ensuring a secure connection between the nozzle body and the air gun.

[0014] Furthermore, the variable diameter hot air gun nozzle also includes multiple second blades and multiple third blades. The multiple second blades are arranged in a ring array on the other end of the nozzle body and located outside the first blade. The lower end of each second blade is rotatably connected to the nozzle body, and the upper end of each second blade is connected to the first blade via a first connecting structure. The multiple third blades are arranged in a ring array on the other end of the nozzle body and located inside the first blade. Each third blade is positioned between two adjacent first blades, and the lower end of each third blade is rotatably connected to the nozzle body. The upper end of each third blade is connected to two adjacent first blades via a second connecting structure. The specific technical effect is that by setting the second and third blades to form a multi-layered blade structure with the first blade, the surface temperature of the nozzle is effectively reduced, greatly reducing the risk of burns. Furthermore, the first connecting structure connects the second blade to the first blade, and the second connecting structure connects the third blade to two adjacent first blades, so that when the rotation of the first blade is adjusted to change the diameter of the second air outlet, the second and third blades can move synchronously with the first blade.

[0015] Furthermore, the first connecting structure includes a first locking block and a second locking block. The first locking block is mounted on the first blade, and the second locking block is mounted on the second blade, with the first locking block and the second locking block engaging with each other. Specifically, the engaging of the first locking block and the second locking block forms a mutual fixation between the first blade and the second blade.

[0016] Furthermore, the second connecting structure includes a support plate and a slot. The slot is disposed on the third blade, and the support plate has an airplane-shaped structure. The belly of the airplane-shaped structure is inserted into the slot, and the two wings of the airplane-shaped structure overlap the two adjacent first blades. The specific technical effect is that the two wings of the airplane-shaped structure press the two adjacent first blades onto the third blade, and the belly of the airplane-shaped structure, inserted into the slot, forms a fixed support plate. Through this connecting structure, the third blade is connected to the two adjacent first blades. When the rotation of the first blades is adjusted to change the diameter of the second air outlet, the third blade can move synchronously with the first blades.

[0017] Furthermore, each of the third blades includes blade I and blade II rotatably connected to each other. The lower end of blade I is rotatably connected to the nozzle body, and blade II is connected to the two adjacent first blades through a second connection structure.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] (1) This utility model achieves adjustable nozzle diameter of hot air gun by moving the adjusting block along the axial direction of the nozzle body to drive the first blade to rotate relative to the nozzle body, thereby adjusting the diameter of the second air outlet. The adjustment is simple and quick.

[0020] (2) By setting the second and third blades to form a multi-layered blade structure with the first blade, this utility model effectively reduces the surface temperature of the nozzle and greatly reduces the chance of being burned.

[0021] (3) The present invention connects the second blade to the first blade through the first connecting structure and the third blade to the two adjacent first blades through the second connecting structure, so that when the rotation of the first blade is adjusted to change the diameter of the second air outlet, the second blade and the third blade can move synchronously with the first blade. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a schematic diagram of the structure of a variable diameter hot air gun nozzle according to the present invention;

[0024] Figure 2 for Figure 1 Partial structural diagram;

[0025] Figure 3 for Figure 2 Enlarged schematic diagram of a local structure at point A;

[0026] Figure 4 for Figure 2Enlarged schematic diagram of the local structure at point B;

[0027] Figure 5 for Figure 2 Enlarged schematic diagram of the local structure at point C;

[0028] Figure 6 This is a schematic diagram of the main body of the nozzle of this utility model;

[0029] Figure 7 This is a schematic diagram of the structure of the ring base of this utility model;

[0030] Figure 8 This is a schematic diagram of the internal structure of the first nut of this utility model;

[0031] Figure 9 This is a schematic diagram of the internal structure of the second nut of this utility model;

[0032] Figure 10 This is a schematic diagram of the connecting rod of this utility model;

[0033] Figure 11 This is a schematic diagram of the structure of the adjusting block of this utility model;

[0034] Figure 12 This is a schematic diagram of the structure of the first blade of this utility model;

[0035] Figure 13 This is a schematic diagram of the installation structure of the first blade and the adjustment assembly of this utility model;

[0036] Figure 14 This is a schematic diagram of the structure of the second blade of this utility model;

[0037] Figure 15 This is a schematic diagram of the structure of the third blade of this utility model;

[0038] Figure 16 This is a schematic diagram of the structure of the support plate portion of this utility model;

[0039] Figure 17 This is a schematic diagram illustrating the adjustment process of the second air outlet diameter of this utility model.

[0040] In the diagram: 1. Nozzle body; 101. First air vent; 102. First pawl; 103. Second pawl; 104. Third pawl; 105. Guide protrusion; 106. Claw portion; 107. First groove; 108. First thread;

[0041] 2. First blade; 201. Second air inlet; 202. Connecting rod;

[0042] 3. Second blade;

[0043] 4. Third blade; 401. Blade I; 402. Blade II;

[0044] 5. Connecting rod; 501. Open spherical locking hole; 502. Hollow groove;

[0045] 6. Adjusting block; 601. Spherical buckle;

[0046] 7. Ring seat; 701. Trapezoidal convex ring; 702. Guide groove;

[0047] 8. First nut; 801. Trapezoidal concave ring;

[0048] 9. Second nut;

[0049] 10. First connecting structure; 1001. First locking block; 1002. Second locking block;

[0050] 11. Second connecting structure; 111. Support plate; 112. Slot. Detailed Implementation

[0051] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0052] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0053] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0054] like Figures 1 to 17 The diagram shows a preferred embodiment of the present invention. This embodiment provides a variable-diameter hot air gun nozzle, comprising: a nozzle body 1, multiple first blades 2, multiple second blades 3, multiple third blades 4, and multiple adjusting components. One end of the nozzle body 1 is detachably mounted on the air outlet of the hot air gun. A first air outlet 101 is formed inside the nozzle body 1. An adjusting ring is fitted around the outside of the nozzle body 1 and threadedly connected to the nozzle body 1. Multiple first blades 2 are arranged in a ring array on the other end of the nozzle body 1, forming a second air outlet 201. The first air outlet 101 and the second air outlet 201 form an air duct. Each first blade 2 is rotatably connected to the nozzle body 1. Multiple second blades 3 are arranged in a ring array on the other end of the nozzle body 1 and located outside the first blades 2. Each second blade 3... The lower end of each blade is rotatably connected to the nozzle body 1. The upper end of each second blade 3 is connected to the first blade 2 via the first connecting structure 10. Multiple third blades 4 are arranged in a ring array on the other end of the nozzle body 1 and located inside the first blade 2. Each third blade 4 is positioned between two adjacent first blades 2. The lower end of each third blade 4 is rotatably connected to the nozzle body 1, and the upper end of each third blade 4 is connected to two adjacent first blades 2 via the second connecting structure 11. The number of adjusting components is the same as that of the first blades 2. The adjusting components are rotatably mounted on the nozzle body 1. One end of the adjusting component is connected to the adjusting ring, and the other end is connected to the first blade 2. The adjusting ring moves axially along the nozzle body 1 to drive the first blade 2 to rotate relative to the nozzle body 1, thereby adjusting the diameter of the second air outlet 201. Thus, by moving the adjusting block 6 axially along the nozzle body 1 to drive the first blade 2 to rotate relative to the nozzle body 1, thereby adjusting the diameter of the second air outlet 201, the nozzle diameter of the hot air gun is adjustable, and the adjustment is simple and quick.

[0055] By setting the second blade 3 and the third blade 4 to form a multi-layered blade structure with the first blade 2, the surface temperature of the nozzle is effectively reduced, greatly minimizing the risk of burns. Furthermore, the second blade 3 is connected to the first blade 2 via the first connecting structure 10, and the third blade 4 is connected to two adjacent first blades 2 via the second connecting structure 11. This ensures that when the rotation of the first blade 2 is adjusted to change the diameter of the second air outlet 201, the second blade 3 and the third blade 4 can move synchronously with the first blade 2. When the hot air gun is in operation, high-temperature hot air is ejected from the nozzle. Traditional single-layer blade structures would cause the nozzle surface temperature to rise rapidly, easily resulting in burns for the operator. However, the multi-layered blade structure in this design forms multiple heat insulation barriers. Even if the inner blades become hot due to contact with the hot air, the outer blades still provide some insulation, further preventing heat transfer and reducing the temperature of the accessible parts of the nozzle, providing a more reliable safety guarantee for the operator.

[0056] Specifically, the nozzle body 1 is provided with a first pawl 102 for installing the first blade 2, a second pawl 103 for installing the second blade 3, and a third pawl 104 for installing the third blade 4. The first blade 2 is rotatably connected to the first pawl 102 via a connecting rod 202, the second blade 3 is rotatably connected to the second pawl 103, and the third blade 4 is rotatably connected to the third pawl 104.

[0057] In a preferred embodiment, each adjusting component includes a connecting rod 5 and an adjusting block 6. The adjusting ring includes a ring seat 7 and a first nut 8. Both the ring seat 7 and the first nut 8 are sleeved on the outside of the nozzle body 1. The outer wall of the ring seat 7 is provided with a trapezoidal protruding ring 701. The inner wall of the first nut 8 is provided with a trapezoidal concave ring 801 that cooperates with the trapezoidal protruding ring 701. The first nut 8 is threadedly connected to the nozzle body 1. One end of the connecting rod 5 is connected to the ring seat 7, and the other end of the connecting rod 5 is rotatably connected to the adjusting block 6. The lower end of the adjusting block 6 is rotatably connected to the first pawl 102, and the upper end of the adjusting block 6 is connected to the first blade 2.

[0058] In a preferred embodiment, each end of the connecting rod 5 is provided with an open spherical locking hole 501, and the two open spherical locking holes 501 are connected by a hollow groove 502. Both the adjusting block 6 and the ring seat 7 are provided with spherical buckles 601 that cooperate with the open spherical locking holes 501. The spherical buckle 601 of the adjusting block 6 is rotatably engaged in one open spherical locking hole 501, and the spherical buckle 601 of the ring seat 7 is rotatably engaged in the other open spherical locking hole 501. The design of the open spherical locking holes 501 allows the spherical buckles 601 to rotate freely within a certain range, while the opening of the locking hole and the shape of the buckle restrict their disengagement, ensuring the reliability of the connection.

[0059] Specifically, one end of the ring seat 7 has a plurality of mounting portions, which are spaced around the ring seat 7. A second groove is formed between two adjacent mounting portions. A trapezoidal protrusion 701 is mounted on the mounting portion. The mounting portions are spaced apart and have a certain elastic deformation capability. When the ring seat 7 is installed with the first nut 8, the trapezoidal protrusion 701 can be locked in the trapezoidal concave ring 801.

[0060] In a preferred embodiment, the outer surface of the first nut 8 is textured to increase friction and facilitate tightening.

[0061] In a preferred embodiment, a guide protrusion 105 is provided on the outer wall of the nozzle body 1, and the guide protrusion 105 extends axially along the nozzle body 1. A guide groove 702 is provided on the inner wall of the ring seat 7 to cooperate with the guide protrusion 105. Thus, the cooperation between the guide protrusion 105 and the guide groove 702 ensures the stability of the movement of the ring seat 7, thereby ensuring the accuracy of the hot air gun nozzle caliber adjustment.

[0062] In a preferred embodiment, a plurality of claw portions 106 are formed at one end of the nozzle body 1. These claw portions 106 are spaced apart around the nozzle body 1, with a first groove 107 formed between adjacent claw portions 106. A first thread 108 is provided on the outer wall of each claw portion 106, and a second nut 9 is fitted onto the outside of each claw portion 106. The inner diameter of the second nut 9 gradually decreases axially away from the first blade 2. Thus, by fitting the claw portions 106 onto the outside of the air gun outlet, and utilizing the engagement of the second nut 9 with the first thread 108 on the claw portions 106, the tightening of the second nut 9, due to its gradually decreasing inner diameter axially away from the first blade 2, exerts a compressive force on the claw portions 106. The spaced claw portions 106 possess a certain elastic deformation capacity, and under compression, they contract inward, thus tightly clamping the air gun outlet and ensuring a secure connection between the nozzle body 1 and the air gun. This structural design simplifies the installation and disassembly of the nozzle body 1 and the air gun. Installation is complete simply by aligning the claw 106 with the air outlet of the hot air gun and tightening the second nut 9. For disassembly, loosening the second nut 9 releases the claw 106, allowing the nozzle body 1 to be easily removed from the hot air gun. Compared to some complex installation structures, this significantly saves time and effort in installation and disassembly, improves work efficiency, and facilitates maintenance and nozzle replacement of the hot air gun.

[0063] In a preferred embodiment, the outer surface of the second nut 9 is textured to increase friction and facilitate tightening.

[0064] In a preferred embodiment, the first connecting structure 10 includes a first locking block 1001 and a second locking block 1002. The first locking block 1001 is mounted on the first blade 2, and the second locking block 1002 is mounted on the second blade 3. The first locking block 1001 and the second locking block 1002 are engaged with each other. Thus, the first locking block 1001 and the second locking block 1002 are engaged with each other to fix the first blade 2 and the second blade 3 together.

[0065] In a preferred embodiment, the second connecting structure 11 includes a support plate portion 111 and a slot portion 112. The slot portion 112 is disposed on the third blade 4. The support plate portion 111 has an airplane-shaped structure, with the belly of the airplane-shaped structure inserted into the slot portion 112. The two wings of the airplane-shaped structure overlap the two adjacent first blades 2 respectively. Thus, the two wings of the airplane-shaped structure press the two adjacent first blades 2 onto the third blade 4, and the belly of the airplane-shaped structure is inserted into the slot portion 112 to fix the support plate portion 111. Through this connecting structure, the third blade 4 is connected to the two adjacent first blades 2. When the rotation of the first blades 2 is adjusted to change the diameter of the second air outlet 201, the third blade 4 can move synchronously with the first blades 2.

[0066] In a preferred embodiment, each third blade 4 includes blade I 401 and blade II 402 rotatably connected to each other. The lower end of blade I 401 is rotatably connected to the nozzle body 1, and blade II 402 is connected to two adjacent first blades 2 through a second connection structure 11.

[0067] The working principle of this utility model is as follows:

[0068] The claw 106 is fitted onto the outside of the air gun outlet. The second nut 9 is then engaged with the first thread 108 on the claw 106. As the second nut 9 is tightened, its inner diameter gradually decreases in the axial direction away from the first blade 2, which will exert a squeezing effect on the claw 106. The second nut 9 locks the claw 106 onto the air gun outlet.

[0069] When the nozzle diameter of the hot air gun needs to be adjusted, the operator rotates the first nut 8, which is threaded onto the nozzle body 1. Rotation causes axial movement along the nozzle body 1. Because the trapezoidal concave ring 801 on the inner wall of the first nut 8 engages with the trapezoidal convex ring 701 on the outer wall of the ring seat 7, the ring seat 7 moves axially synchronously with the first nut 8. This movement of the ring seat 7 drives the connecting rod 5 to move axially. One end of the connecting rod 5 has an open spherical locking hole 501 connected to a spherical buckle 601 on the adjusting ring, and the other end has an open spherical locking hole 501 connected to a spherical buckle 601 on the adjusting block 6. This allows the axial movement of the connecting rod 5 to raise or lower one end of the adjusting block 6. The lower end of the adjusting block 6 is rotatably connected to the first pawl 102, and the upper end is connected to the first blade 2. When one end of the adjusting block 6 is raised or lowered, the adjusting block 6 rotates relative to the nozzle body 1, thereby causing the first blade 2 to rotate relative to the nozzle body 1, thus changing the diameter of the second air outlet 201. (See also...) Figure 17 As shown, when the ring seat 7 moves upward, the upper end of the first blade 2 closes towards the center, and the diameter of the second air outlet 201 decreases. When the ring seat 7 moves downward, the upper end of the first blade 2 opens away from the center, and the diameter of the second air outlet 201 increases.

[0070] Compared with the prior art, the beneficial effects of this utility model are:

[0071] (1) This utility model achieves adjustable nozzle diameter of hot air gun by moving the adjusting block 6 along the axial direction of the nozzle body 1 to drive the first blade 2 to rotate relative to the nozzle body 1, thereby adjusting the diameter of the second air outlet 201. The adjustment is simple and quick.

[0072] (2) By setting the second blade 3 and the third blade 4 to form a multi-layered blade structure with the first blade 2, this utility model effectively reduces the surface temperature of the nozzle and greatly reduces the chance of being burned.

[0073] (3) The present invention connects the second blade 3 to the first blade 2 through the first connecting structure 10 and the third blade 4 to the two adjacent first blades 2 through the second connecting structure 11, so that when the rotation of the first blade 2 is adjusted to change the diameter of the second air outlet 201, the second blade 3 and the third blade 4 can move synchronously with the first blade 2.

[0074] The above description is based on the preferred embodiments of this utility model. Through the above description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined by the scope of the claims.

Claims

1. A variable diameter hot air gun nozzle, characterized by, include: The nozzle body (1) is detachably installed at one end of the air outlet of the air gun. A first air outlet (101) is provided inside the nozzle body (1). An adjusting ring is sleeved on the outside of the nozzle body (1). The adjusting ring is threadedly connected to the nozzle body (1). Multiple first blades (2) are arranged in a ring array on the other end of the nozzle body (1). Multiple first blades (2) surround to form a second air vent (201). The first air vent (101) and the second air vent (201) form an air duct. Each first blade (2) is rotatably connected to the nozzle body (1). Multiple adjustment components are provided, the number of which is the same as that of the first blade (2). The adjustment components are rotatably mounted on the nozzle body (1). One end of the adjustment component is connected to the adjustment ring, and the other end of the adjustment component is connected to the first blade (2). The adjustment ring moves axially along the nozzle body (1) to drive the first blade (2) to rotate relative to the nozzle body (1), thereby adjusting the diameter of the second air outlet (201).

2. A variable diameter hot air gun nozzle as claimed in claim 1 wherein, Each of the aforementioned adjustment components includes a connecting rod (5) and an adjustment block (6). One end of the connecting rod (5) is connected to the adjustment ring, and the other end of the connecting rod (5) is rotatably connected to the adjustment block (6). The lower end of the adjustment block (6) is rotatably connected to the nozzle body (1), and the upper end of the adjustment block (6) is connected to the first blade (2).

3. A variable diameter hot air gun nozzle as claimed in claim 2, wherein, The connecting rod (5) has open spherical locking holes (501) at both ends, and the two open spherical locking holes (501) are connected by a hollow groove (502). The adjusting block (6) and the adjusting ring are each provided with a spherical buckle (601) that cooperates with the open spherical locking holes (501). The spherical buckle (601) of the adjusting block (6) is rotatably locked into one of the open spherical locking holes (501), and the spherical buckle (601) of the adjusting ring is rotatably locked into the other open spherical locking hole (501).

4. The variable diameter hot air gun nozzle as described in claim 1, characterized in that, The adjusting ring includes a ring seat (7) and a first nut (8). The ring seat (7) and the first nut (8) are both sleeved on the outside of the nozzle body (1). One end of the adjusting component is connected to the ring seat (7). The outer wall of the ring seat (7) is provided with a trapezoidal convex ring (701). The inner wall of the first nut (8) is provided with a trapezoidal concave ring (801) that cooperates with the trapezoidal convex ring (701). The first nut (8) is threadedly connected to the nozzle body (1).

5. A variable diameter hot air gun nozzle as claimed in claim 4 wherein, The outer wall of the nozzle body (1) is provided with a guide protrusion (105), which extends along the axial direction of the nozzle body (1). The inner wall of the ring seat (7) is provided with a guide groove (702) that cooperates with the guide protrusion (105).

6. A variable diameter hot air gun nozzle as defined in claim 1, wherein, One end of the nozzle body (1) is formed with a plurality of claws (106), which are arranged at intervals around the nozzle body (1). A first groove (107) is formed between two adjacent claws (106). A first thread (108) is provided on the outer wall of the claws (106). A second nut (9) is sleeved on the outside of the claws (106). The inner diameter of the second nut (9) gradually decreases in the axial direction away from the first blade (2).

7. A variable diameter hot air gun nozzle as defined in claim 1 wherein, The variable diameter hot air gun nozzle also includes multiple second blades (3) and multiple third blades (4). The multiple second blades (3) are arranged in a ring array on the other end of the nozzle body (1) and located outside the first blade (2). The lower end of each second blade (3) is rotatably connected to the nozzle body (1), and the upper end of each second blade (3) is connected to the first blade (2) through a first connecting structure (10). The multiple third blades (4) are arranged in a ring array on the other end of the nozzle body (1) and located inside the first blade (2). Each third blade (4) is arranged between two adjacent first blades (2). The lower end of each third blade (4) is rotatably connected to the nozzle body (1), and the upper end of each third blade (4) is connected to two adjacent first blades (2) through a second connecting structure (11).

8. The variable diameter hot air gun nozzle as described in claim 7, characterized in that, The first connecting structure (10) includes a first locking block (1001) and a second locking block (1002). The first locking block (1001) is mounted on the first blade (2), and the second locking block (1002) is mounted on the second blade (3). The first locking block (1001) and the second locking block (1002) are locked together.

9. A variable diameter hot air gun nozzle as defined in claim 7 wherein, The second connecting structure (11) includes a support plate (111) and a slot (112). The slot (112) is disposed on the third blade (4). The support plate (111) has an airplane-shaped structure. The belly of the airplane-shaped structure is inserted into the slot (112). The two wings of the airplane-shaped structure overlap on the two adjacent first blades (2).

10. A variable diameter hot air gun nozzle as defined in claim 7, wherein, Each of the third blades (4) includes blade I (401) and blade II (402) rotatably connected to each other. The lower end of blade I (401) is rotatably connected to the nozzle body (1), and blade II (402) is connected to the two adjacent first blades (2) through a second connection structure (11).

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