Air supply mechanism of handheld fan and handheld fan

Abstract

The utility model belongs to the field of handheld fans, and relates to an air supply mechanism of a handheld fan and the handheld fan, and the air supply mechanism of the handheld fan comprises a shell and a fan part; wherein the shell is provided with an air inlet, an air outlet, a flow guide channel communicating with the air inlet and the air outlet, a butt joint channel and a communicating opening communicating with the flow guide channel and the butt joint channel, and the fan part is arranged in the flow guide channel and blocks the communicating opening. The air inlet, the air outlet, the flow guide channel, the butt joint channel and the communication opening are directly formed in the shell, and the upper fan part is arranged in the flow guide channel and blocks the communication opening, so that airflow in the flow guide channel can be prevented from flowing into the butt joint channel; therefore, the fan part drives the air flow to directly flow through the air inlet, the flow guide channel and the air outlet in sequence, direct inlet and direct outlet of the air flow are achieved, the length of the flow guide channel can be effectively shortened, the turbulent flow phenomenon is avoided, and the air flow speed is increased.

Description

Technical Field

[0001] This application relates to the field of handheld fan technology, and more specifically, to an air delivery mechanism for a handheld fan and a handheld fan. Background Technology

[0002] The main function of a handheld fan is to generate airflow to help people lower their body temperature and bring a cooling sensation. It is suitable for various occasions and environments, such as outdoor activities, offices, and homes. In summer, when people are prone to heatstroke or feel stuffy and uncomfortable, a small handheld fan can provide a cooling sensation and effectively relieve symptoms of discomfort.

[0003] Generally, a handheld fan includes a handheld part, an air supply part connected to the handheld part, and a fan assembly installed inside the handheld part. The bottom of the handheld part has an air inlet, and the air supply part has an air outlet. The handheld part and the air supply part form a guide channel connecting the air inlet and the air outlet. The fan assembly drives the airflow sequentially through the air inlet, the guide channel, and the air outlet to achieve blowing. However, the aforementioned handheld fan results in a guide channel length almost equal to the sum of the handheld part's length and the air supply part's length. This makes the guide channel too long, easily creating turbulence and affecting airflow speed, thus requiring improvement. Utility Model Content

[0004] Therefore, it is necessary to provide an air delivery mechanism for a handheld fan to address the above problems, which aims to effectively shorten the length of the airflow channel, avoid turbulence, and thus improve airflow speed.

[0005] The embodiments of this application achieve the above objectives through the following technical solutions.

[0006] This application provides an air delivery mechanism for a handheld fan, the air delivery mechanism of which includes a housing and a fan section; wherein,

[0007] The housing has an air inlet, an air outlet, a guide channel connecting the air inlet and the air outlet, a docking channel, and a connecting port connecting the guide channel and the docking channel. The fan is disposed in the guide channel and blocks the connecting port.

[0008] In one embodiment, the connection port is located radially on the side of the docking channel closer to the air outlet.

[0009] In one embodiment, the air delivery mechanism of the handheld fan further includes a baffle plate, the outer peripheral wall of which is sealed to the inner peripheral wall at the connection between the docking channel and the guide channel, and the portion of the baffle plate near the air outlet forms the communication opening.

[0010] In one embodiment, the fan unit is detachably installed in the air guide channel via the air outlet.

[0011] In one embodiment, the fan section includes an air guide tube, a mounting bracket, and a fan assembly; wherein,

[0012] The outer peripheral wall of the air guide duct cooperates with the inner peripheral wall of the air guide channel to block the communication port. The outer peripheral wall of the mounting bracket and the inner peripheral wall of the air guide duct are connected by multiple grilles. The fan assembly is mounted on the mounting bracket.

[0013] In one embodiment, the air inlet is located above the docking channel, such that the air inlet end of the air guide tube faces directly toward the air inlet; the air outlet end of the air guide tube extends directly out of the air outlet.

[0014] In one embodiment, the inner diameter of the air inlet end of the air guide tube is gradually narrowing from the air inlet to the air outlet; and / or, the inner diameter of the air outlet end of the air guide tube is gradually widening from the air inlet to the air outlet.

[0015] In one embodiment, one of the grilles is hollow to form a wire-passing grille, and the two ends of the wire-passing grille penetrate the inner peripheral wall of the mounting bracket and the outer peripheral wall of the air guide duct respectively.

[0016] A guide structure is provided between the inner peripheral wall of the flow channel and the outer peripheral wall of the air guide tube. One end of the guide structure is connected to the communication port, and the other end of the guide structure is connected to the wire grid.

[0017] In one embodiment, the housing is arranged in a bent tube shape and has a curved connection between a guide shell and a docking shell. The air inlet, the air outlet, and the guide channel are all located on the guide shell, the docking channel is located on the docking shell, and the connecting port is located at the connection between the guide shell and the docking shell.

[0018] This application also provides a handheld fan, which includes an air delivery mechanism and a handheld part as described above. The handheld part is connected to the housing and is connected to the end of the docking channel away from the communication port.

[0019] Compared with the prior art, the embodiments of this application have the following advantages: In this application, by directly setting an air inlet, an air outlet, a guide channel, a docking channel, and a connecting port on the housing, and combining the upper fan part set in the guide channel and blocking the connecting port, it is possible to prevent the airflow in the guide channel from flowing into the docking channel, so that the fan part drives the airflow to pass through the air inlet, the guide channel, and the air outlet in sequence, realizing the straight inlet and straight outlet of the airflow, thereby effectively shortening the length of the guide channel, avoiding the phenomenon of turbulence, and thus increasing the airflow speed. Attached Figure Description

[0020] To more clearly illustrate the solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the air delivery mechanism of the handheld fan in this application;

[0022] Figure 2 yes Figure 1 Another structural diagram from a different perspective;

[0023] Figure 3 yes Figure 1 Another structural diagram from a different perspective;

[0024] Figure 4 This is a schematic diagram of the air delivery mechanism and handheld part of the handheld fan in this application during assembly;

[0025] Figure 5 This is a structural diagram of the air delivery mechanism and handheld part of the handheld fan in this application when disassembled.

[0026] Reference numerals: 1000, handheld fan; 100, air delivery mechanism of handheld fan; 10, housing; 101, air inlet; 102, air outlet; 103, air guide channel; 104, docking channel; 105, connecting port; 106, fastener; 107, guide groove; 11, air guide shell; 12, docking shell; 20, fan section; 21, air guide tube; 211, grille; 212, snap-fit; 213, air outlet ring; 2131, first section; 2132, second section; 214, guide rib; 2141, guide slope; 22, mounting bracket; 23, fan assembly; 30, wind deflector; 200, handheld part. Detailed Implementation

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0028] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0029] This application provides an air delivery mechanism for a handheld fan. By directly providing a guide channel on the housing that directly connects the air inlet and the air outlet, and by placing the upper fan part inside the guide channel and sealing the connection, it can effectively prevent the airflow in the guide channel from flowing into the connecting channel. This allows the fan part to drive the airflow directly through the air inlet, the guide channel, and the air outlet in sequence, achieving straight airflow in and out. This effectively shortens the length of the guide channel, avoids turbulence, and thus increases the airflow speed.

[0030] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0031] Please see Figures 1 to 3 This application provides an air delivery mechanism 100 for a handheld fan, which includes a housing 10 and a fan section 20.

[0032] Housing 10 provides mounting locations for other components such as the fan unit 20. (See also...) Figure 2 and Figure 3 The housing 10 has an air inlet 101, an air outlet 102, a flow guide channel 103, a docking channel 104, and a connecting port 105. The flow guide channel 103 connects the air inlet 101 and the air outlet 102, and the connecting port 105 connects the flow guide channel 103 and the docking channel 104.

[0033] It is understandable that the air inlet 101, air outlet 102 and connecting port 105 can have many shapes. They can be regular shapes such as circles, squares, triangles, hexagons, etc., or they can be other irregular shapes. The shapes of the three can be the same or different, and no specific limitation is made here.

[0034] Specifically, multiple air inlets 101 are provided, arranged in a honeycomb pattern. This arrangement effectively rectifyes the airflow, preventing turbulence and aerodynamic noise. Obviously, in other embodiments, the multiple air inlets 101 can also be arranged in a circular array, rectangular array, or other regular pattern. They can also be arranged randomly, or even have only one air inlet 101. Furthermore, the end of the guide channel 103 away from the air inlet 101 penetrates the housing 10 to form an air outlet 102, facilitating the formation of the air outlet 102.

[0035] In this embodiment, the airflow channel 103 is arranged in a straight line. This arrangement allows for a straight airflow when the handheld fan 1000 is blowing air, improving blowing efficiency. In other embodiments, the airflow channel 103 may also be arranged in other linear shapes such as curved or zigzag.

[0036] The docking channel 104 is used to dock and connect with the handheld part 200 of the handheld fan 1000, which will be described below. The specific shape of the docking channel 104 is set with reference to the shape of the airflow channel 103, and will not be described in detail here.

[0037] By way of example and not limitation, the length of the docking channel 104 is less than the length of the flow channel 103. For example, the length of the docking channel 104 can be half the length of the flow channel 103, or the length of the docking channel 104 can be one-third the length of the flow channel 103. This can effectively reduce the size of the corresponding position of the housing 10, thereby reducing the weight of the housing 10 and thus reducing the weight of the handheld fan 1000, which is beneficial to the lightweight design of the handheld fan 1000.

[0038] The fan unit 20 is disposed within the airflow channel 103 and the connecting port 105 is blocked. The fan unit 20 is used to drive the airflow to pass through the air inlet 101, the airflow channel 103 and the air outlet 102 in sequence. Specifically, the fan unit 20 is installed in the airflow channel 103 through the air outlet 102, which facilitates the assembly of the housing 10 and the fan unit 20.

[0039] It is worth mentioning that the number of fan sections 20 can be one, which blocks the communication port 105; the number of fan sections 20 can also be multiple. In this case, one of the multiple fan sections 20 can block the communication port 105, two of the multiple fan sections 20 can block the communication port 105 together, or multiple fan sections 20 can block the communication port 105 together. No specific limitation is made here. Similarly, the number of communication ports 105 can be one, and correspondingly, one or more fan sections 20 can block the communication port 105; the number of communication ports 105 can also be multiple, and correspondingly, one or more fan sections 20 can block multiple communication ports 105.

[0040] Through the above technical solution, because the fan unit 20 is designed to block the connection port 105, it can effectively prevent the airflow in the guide channel 103 from flowing into the docking channel 104, so that the fan unit 20 can drive the airflow to pass directly through the air inlet 101, the guide channel 103 and the air outlet 102 in sequence, so as to achieve the straight inlet and straight outlet of the airflow, thereby effectively shortening the length of the guide channel 103, avoiding the phenomenon of turbulence, and thus increasing the airflow speed.

[0041] Please see Figures 1 to 3 Furthermore, the housing 10 is arranged in a bent tube shape and has a curved connection between the guide housing 11 and the docking housing 12. The air inlet 101, the air outlet 102 and the guide channel 103 are all located on the guide housing 11, the docking channel 104 is located on the docking housing 12, and the connecting port 105 is located at the connection between the guide housing 11 and the docking housing 12. This arrangement facilitates the processing and forming of the air inlet 101, the air outlet 102, the guide channel 103, the docking channel 104 and the connecting port 105, and also facilitates the lightweight design of the handheld fan 1000.

[0042] Obviously, in other embodiments, the housing 10 may also be T-shaped with a vertically connected flow guide housing 11 and docking housing 12. The housing 10 may also be in other shapes, which will not be described in detail here.

[0043] Please see Figures 1 to 3 Considering that the axial length of the fan section 20 is at least equal to the distance between the connecting port 105 and the air outlet 102 in order to block the connecting port 105 when the fan section 20 is installed in the guide channel 103, if the distance between the connecting port 105 and the air outlet 102 can be shortened, the axial length of the fan section 20 can be shortened at the same time, the weight of the fan section 20 can be reduced, and the lightweight design of the fan section 20 can be facilitated. In view of this, in one embodiment of this application, the connecting port 105 is located on the side of the docking channel 104 that is radially close to the air outlet 102. With this arrangement, the distance between the connecting port 105 and the air outlet 102 can be effectively shortened.

[0044] It is understandable that the size of the connecting port 105 is positively correlated with the axial length of the fan section 20. That is, the smaller the connecting port 105, the smaller the axial length of the fan section 20, which reduces the weight of the fan section 20 and facilitates its lightweight design. Specifically, the connecting port 105 is elongated, with its long side perpendicular to the axial direction of the fan section 20 and its short side parallel to the axial direction of the fan section 20. This facilitates the sealing of the connecting port by the fan section 20. Furthermore, the length of the long side of the connecting port 105 is 9.0 to 10.0 mm, and the length of the short side is 8.0 to 9.0 mm. For example, the long side of the connecting port 105 is 9.0 mm and the short side is 8.69 mm. This design minimizes the size of the connecting port 105 while allowing wires to pass through it easily.

[0045] Obviously, in other embodiments, the connection port 105 may also be located on the side of the docking channel 104 that is radially away from the air outlet 102, the connection port 105 may also be located in the middle of the docking channel 104 radially, or the connection port 105 may be located at other positions radially in the docking channel 104.

[0046] Please see Figures 1 to 3 In order to facilitate the formation of the connecting port 105, in one embodiment of this application, the air delivery mechanism 100 of the handheld fan also includes a baffle plate 30. The outer peripheral wall of the baffle plate 30 is sealed to the inner peripheral wall at the connection between the docking channel 104 and the guide channel 103. The side of the baffle plate 30 near the air outlet 102 forms the connecting port 105.

[0047] Specifically, the wind deflector 30 is arc-shaped, and the curvature of the wind deflector 30 is adapted to the curvature of the inner peripheral wall of the guide channel 103 so that the guide channel 103 can form a cylindrical inner peripheral wall, thereby reducing airflow turbulence, increasing airflow velocity, and reducing noise.

[0048] In this embodiment, the baffle plate 30 is integrally formed with the housing 10, which ensures that the outer peripheral wall of the baffle plate 30 is sealed to the inner peripheral wall at the connection between the docking channel 104 and the guide channel 103, so that the guide channel 103 and the docking channel 104 have only one connection position, the connecting port 105. In other embodiments, the baffle plate 30 can also be fixed to the housing 10 by other sealing connection methods such as bonding or ultrasonic welding, so that the outer peripheral wall of the baffle plate 30 is sealed to the inner peripheral wall at the connection between the docking channel 104 and the guide channel 103.

[0049] Please see Figures 1 to 3To facilitate the assembly and disassembly of the fan unit 20, in one embodiment of this application, the fan unit 20 is detachably installed in the air guide channel 103 via the air outlet 102. This arrangement allows for easy assembly and disassembly of the fan unit 20 via the air outlet 102. Obviously, in other embodiments, the fan unit 20 can also be fixedly installed in the air guide channel 103 via the air outlet 102, and the fixing method can be adhesive bonding, ultrasonic welding, etc.

[0050] Please see Figures 1 to 3 There are many ways in which the fan unit 20 can be detachably installed in the air guide channel 103 via the air outlet 102. In one embodiment of this application, the fan unit 20 includes an air guide tube 21, a mounting bracket 22, and a fan assembly 23. The two ends of the air guide tube 21 in the axial direction are respectively formed as an air inlet end and an air outlet end. The outer peripheral wall of the air guide tube 21 cooperates with the inner peripheral wall of the air guide channel 103 to block the communication port 105. The mounting bracket 22 is located inside the air guide tube 21. The outer peripheral wall of the mounting bracket 22 is connected to the inner peripheral wall of the air guide tube 21 through multiple grilles 211. The fan assembly 23 is disposed on the mounting bracket 22.

[0051] Specifically, the air duct 21, mounting bracket 22, and grille 211 are integrally formed, which ensures the structural strength of the fan unit 20. In addition, the fan assembly 23 can be fixedly installed on the mounting bracket 22 in the above embodiment, or it can be installed on the mounting bracket 22 by means of detachable connection such as snap-fit ​​212, threaded connection, or magnetic connection. No specific limitation is made here.

[0052] Furthermore, the outer peripheral wall of the air guide duct 21 is interference-fitted with the inner peripheral wall of the flow channel 103, which enables the outer peripheral wall of the air guide duct 21 and the inner peripheral wall of the flow channel 103 to form a tight fit, thereby enhancing the fixing strength of the air guide duct 21.

[0053] With the above technical solution, when installing the fan unit 20, the air guide tube 21 is inserted into the guide channel 103 through the air outlet 102 until the outer peripheral wall of the air guide tube 21 is completely attached to the inner peripheral wall of the guide channel 103, thus completing the installation of the fan unit 20; when disassembling the fan unit 20, the air guide tube 21 is pried out through the air outlet 102 until the outer peripheral wall of the air guide tube 21 is completely separated from the inner peripheral wall of the guide channel 103, thus completing the disassembly of the fan unit 20.

[0054] In other embodiments, the fan unit 20 may also be installed in the airflow channel 103 by means of detachable connection such as threaded connection or magnetic connection, which will not be described in detail here.

[0055] Furthermore, the air inlet 101 is located on the cavity wall inside the housing 10, directly opposite the flow channel 103. The cavity wall is arc-shaped, and the shape of the end face of the air guide tube 21 near the air inlet 101 is adapted to the shape of the cavity wall and is arc-shaped, so that the end face of the air guide tube 21 near the air inlet 101 directly abuts against the cavity wall. This allows the airflow to be drawn in through the air inlet 101 and then directly accelerated through the air guide tube 21 and blown toward the user, which is conducive to the straight inlet and outlet of the airflow.

[0056] Please see Figures 1 to 3 In order to enhance the fixing strength of the fan part 20, a fastener 106 is provided on the inner peripheral wall of the air guide channel 103 near the air outlet 102, and a buckle 212 is provided on the outer peripheral wall of the air guide tube 21 near the air outlet. The buckle 212 and the fastener 106 are fastened together, which can enhance the fixing strength of the fan part 20.

[0057] Further, please refer to Figure 2 and Figure 5 The air guide duct 21 has an air outlet end that is formed into an air outlet ring 213. The air outlet ring 213 has a first segment 2131 and a second segment 2132 connected to the first segment 2131. The outer diameter of the first segment 2131 is smaller than the outer diameter of the second segment 2132. The end of the first segment 2131 away from the second segment 2132 abuts against the end face of the housing 10 adjacent to the air outlet 102, so that the end face of the second segment 2132 adjacent to the air outlet 102 of the housing 10 is spaced apart. With this configuration, when disassembling the fan part 20, a finger or tool can be inserted between the end face of the second segment 2132 and the end face of the housing 10 adjacent to the air outlet 102 to pry the second segment 2132 out, thereby facilitating the removal of the air guide duct 21 from the guide channel 103.

[0058] Please see Figures 1 to 3 In order to enable the airflow to flow straight in and out of the air guide duct 21, in one embodiment of this application, the air inlet 101 is located above the docking channel 104, so that the air inlet end of the air guide duct 21 faces the air inlet 101 directly; the air outlet end of the air guide duct 21 extends directly out of the air outlet 102.

[0059] Please see Figure 2 , Figure 4 as well as Figure 5In order to guide the airflow when it flows into and out of the air guide duct 21, in one embodiment of this application, the inner diameter of the air inlet end of the air guide duct 21 gradually narrows from the air inlet 101 to the air outlet 102; the inner diameter of the air outlet end of the air guide duct 21 gradually widens from the air inlet 101 to the air outlet 102. That is, the inner diameter of the air outlet ring 213 in the above embodiment gradually widens from the air inlet 101 to the air outlet 102. This arrangement makes both the air inlet and the air outlet end of the air guide duct 21 funnel-shaped, thereby guiding the airflow when it flows in and out, and thus facilitating the flow of air into and out of the air guide duct 21.

[0060] Obviously, in other embodiments, the inner diameter of the air inlet end of the air guide duct 21 can be set to gradually decrease from the air inlet 101 to the air outlet 102, or the inner diameter of the air outlet end of the air guide duct 21 can be set to gradually increase from the air inlet 101 to the air outlet 102.

[0061] Please see Figures 1 to 3 In order to facilitate the connection of the electrical connection part of the fan assembly 23 to the electrical connection part in the handheld part 200 described below via wires, in one embodiment of this application, a grille 211 is hollow to form a wire-passing grille 211, and the two ends of the wire-passing grille 211 pass through the inner peripheral wall of the mounting bracket 22 and the outer peripheral wall of the air guide tube 21 respectively; a guide structure is provided between the inner peripheral wall of the flow channel 103 and the outer peripheral wall of the air guide tube 21, one end of the guide structure is connected to the connecting port 105, and the other end of the guide structure is connected to the wire-passing grille 211.

[0062] When connecting the electrical connection portion of the fan assembly 23 and the electrical connection portion inside the handheld part 200 via a wire, firstly, the first end of the wire is connected to the electrical connection portion of the fan assembly 23; secondly, the second end of the wire is passed sequentially through the wire grid 211, the guide structure, and the connecting port 105; finally, the second end of the wire is connected to the electrical connection portion inside the handheld part 200. In this way, the electrical connection between the electrical connection portion of the fan assembly 23 and the electrical connection portion inside the handheld part 200 can be completed.

[0063] Specifically, please refer to Figures 1 to 3The guiding structure includes a guide groove 107 and two guide ribs 214. The guide groove 107 is located on the inner peripheral wall of the air guide channel 103, and is provided through the side of the guide groove 107 near the air outlet 102 and through the side of the guide groove 107 away from the air outlet 102 to communicate with the connecting port 105. The two guide ribs 214 are arranged in parallel on the outer peripheral wall of the air guide duct 21, and each guide rib 214 extends along the axial direction of the air guide duct 21. The two guide ribs 214 slide against the two groove walls in the width direction of the guide groove 107. This arrangement serves two purposes: firstly, the guide groove 107 and the two guide ribs 214 provide guidance during the installation of the air guide duct 21; secondly, the two guide ribs 214 form a channel for the wires to pass through.

[0064] In other embodiments, the guide structure may also include a guide groove 107 and a guide rib 214, with the guide rib 214 slidingly abutting against one side wall of the guide groove 107 in the width direction.

[0065] Further, please refer to Figures 1 to 3 The thickness of the guide rib 214 in the radial direction of the air duct 21 gradually decreases from the air outlet 102 to the air inlet 101, so that the side of the guide rib 214 facing away from the air duct 21 forms a guide slope 2141. With this setting, the guide slope 2141 can play a guiding role when the guide rib 214 slides into the guide groove 107, thereby facilitating the guide rib 214 to slide into the guide groove 107.

[0066] Please see Figure 4 and Figure 5 This application also provides a handheld fan 1000, which includes an air delivery mechanism 100 and a handheld part 200 as described above. The handheld part 200 is connected to the housing 10 and is connected to the end of the docking channel 104 away from the communication port 105. The connection method between the handheld part 200 and the housing 10 can be a fixed connection as described in the above embodiments or a detachable connection, and is not specifically limited here.

[0067] The specific structure of the air delivery mechanism 100 of the handheld fan is as described in the above embodiments. Since the handheld fan 1000 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0068] Obviously, the embodiments described above are only some embodiments of this application, not all embodiments. The accompanying drawings show preferred embodiments of this application, but do not limit the patent scope of this application. This application can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this application's specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the scope of patent protection of this application.

Claims

1. An air delivery mechanism for a handheld fan, characterized in that, The air delivery mechanism of the handheld fan includes a housing and a fan section; wherein, The housing has an air inlet, an air outlet, a guide channel connecting the air inlet and the air outlet, a docking channel, and a connecting port connecting the guide channel and the docking channel. The fan is disposed in the guide channel and blocks the connecting port.

2. The air delivery mechanism of the handheld fan according to claim 1, characterized in that, The connecting port is located radially on the side of the docking channel closer to the air outlet.

3. The air delivery mechanism of the handheld fan according to claim 2, characterized in that, The air delivery mechanism of the handheld fan also includes a baffle plate. The outer peripheral wall of the baffle plate is sealed to the inner peripheral wall at the connection between the docking channel and the guide channel. The portion of the baffle plate near the air outlet forms the communication port.

4. The air delivery mechanism of the handheld fan according to claim 1, characterized in that, The fan unit is detachably installed in the air guide channel via the air outlet.

5. The air delivery mechanism of the handheld fan according to claim 4, characterized in that, The fan unit includes an air guide tube, a mounting bracket, and a fan assembly; wherein... The outer peripheral wall of the air guide duct cooperates with the inner peripheral wall of the air guide channel to block the communication port. The outer peripheral wall of the mounting bracket and the inner peripheral wall of the air guide duct are connected by multiple grilles. The fan assembly is mounted on the mounting bracket.

6. The air delivery mechanism of the handheld fan according to claim 5, characterized in that, The air inlet is located above the docking channel, so that the air inlet end of the air guide tube faces directly toward the air inlet; the air outlet end of the air guide tube extends directly out of the air outlet.

7. The air delivery mechanism of the handheld fan according to claim 5, characterized in that, The inner diameter of the air inlet end of the air guide tube is gradually narrowing from the air inlet to the air outlet; and / or, the inner diameter of the air outlet end of the air guide tube is gradually widening from the air inlet to the air outlet.

8. The air delivery mechanism of the handheld fan according to claim 5, characterized in that, The aforementioned grille is hollow to form a wire-passing grille, and the two ends of the wire-passing grille penetrate the inner peripheral wall of the mounting bracket and the outer peripheral wall of the air guide duct respectively; A guide structure is provided between the inner peripheral wall of the flow channel and the outer peripheral wall of the air guide tube. One end of the guide structure is connected to the communication port, and the other end of the guide structure is connected to the wire grid.

9. The air delivery mechanism of the handheld fan according to any one of claims 1 to 8, characterized in that, The housing is arranged in a bent tube shape and has a curved connection between the guide shell and the docking shell. The air inlet, the air outlet and the guide channel are all located in the guide shell, the docking channel is located in the docking shell, and the connecting port is located at the connection between the guide shell and the docking shell.

10. A handheld fan, characterized in that, The handheld fan includes an air delivery mechanism as described in any one of claims 1 to 9 and a handheld part, the handheld part being connected to the housing and communicating with the end of the docking channel away from the communication port.

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