Helmet fan assembly with multiple combined blowing modes

Abstract

The utility model relates to the technical field of safety helmets, in particular to a multi-blowing-mode combined fan assembly for a helmet, which comprises a safety helmet and a fan assembly, the fan assembly is sleeved on the safety helmet; the fan assembly comprises a mounting base and a wind direction adjusting unit, the wind direction adjusting unit comprises a shell, a plurality of fan blades, adjusting blades, connecting rods and adjusting plates, the adjusting blades comprise the first adjusting blades and the second adjusting blades, the connecting rods comprise the first connecting rod and the second connecting rod, and the adjusting plates comprise the first adjusting plate and the second adjusting plate. The fan blades are averagely divided into the first set of blades and the second set of blades, the fan blades in the wind direction adjusting unit are divided into the first set of blades and the second set of blades, the first set of blades and the second set of blades are independently controlled, and the installation base is rotationally connected with the shell, so that one-way or two-way 360-degree adjustment of the wind direction can be achieved; and a user can conveniently adjust the wind direction according to the actual demand or the change of the working environment when using the fan assembly.

Description

Technical Field

[0001] This utility model relates to the field of safety helmet technology, and in particular to a helmet fan assembly with multiple blowing modes. Background Technology

[0002] In modern industry and construction, safety helmets are essential protective equipment for workers, and their importance is self-evident. They not only effectively prevent head injuries from falling objects and collisions, but also provide a certain degree of heat and ultraviolet protection, ensuring the basic safety of workers in complex and ever-changing working environments. However, when working in high-temperature environments, workers face enormous thermal stress challenges, which not only affect work efficiency but may also lead to serious occupational diseases such as heatstroke and heat exhaustion, and even endanger their lives.

[0003] To address the adverse effects of high temperatures on workers, a type of safety helmet with a built-in fan has emerged on the market. Through built-in or external fan design, it uses airflow to remove heat from the head, providing immediate cooling and effectively alleviating discomfort caused by high-temperature work. However, while this innovative design improves the working environment to some extent, existing technology still has significant limitations. Specifically, most existing safety helmet fans are fixed in design, unable to adjust the airflow direction according to the worker's actual needs or changes in the working environment. This limitation often results in the fan's cooling effect not reaching its optimal level, and in some cases, improper airflow direction may even cause discomfort, thus affecting worker efficiency and safety.

[0004] Furthermore, some safety helmet designs that incorporate fans through openings in the shell, while achieving a cooling function, reduce the structural strength of the helmet's outer shell, leading to decreased impact and lateral pressure resistance, making it difficult to meet higher safety standards. This not only may affect the helmet's basic protective function but may also pose a potential threat to worker safety.

[0005] Therefore, overcoming the shortcomings of the existing technology is an urgent problem to be solved in this technical field. Utility Model Content

[0006] The technical problem this invention aims to solve is that existing safety helmets with fans cannot adjust the airflow direction, and the method of installing them by making holes in the helmet reduces the safety of the helmet.

[0007] The present invention adopts the following technical solution:

[0008] On the one hand, this utility model provides a helmet fan assembly with multiple blowing modes, including: a safety helmet 1 and a fan assembly 2; the fan assembly 2 is sleeved on the safety helmet 1;

[0009] The fan assembly 2 includes a mounting base 21 and an airflow adjustment unit 22. The airflow adjustment unit 22 includes a housing 220, multiple fan blades 221, adjusting blades 222, a connecting rod 223, and an adjusting plate 224. The two ends of the fan blades 221 and the adjusting blades 222 are respectively rotatably connected to the housing 220. Both the fan blades 221 and the adjusting blades 222 are rotatably connected to the connecting rod 223. The adjusting plate 224 is slidably connected to the housing 220 and is used to move the adjusting blades 222. The mounting base 21 and the housing 220 are rotatably connected.

[0010] The adjusting blade 222 includes a first adjusting blade 2221 and a second adjusting blade 2222; the connecting rod 223 includes a first connecting rod 2230 and a second connecting rod 2231; the adjusting plate 224 includes a first adjusting plate 2241 and a second adjusting plate 2242; the fan blade 221 is evenly divided into a first group of blades 2210 and a second group of blades 2211; the first group of blades 2210 and the first adjusting blade 2221 are rotatably connected to the first connecting rod 2230; the first adjusting plate 2241 actuates the first adjusting blade 2221 to rotate; the second group of blades 2211 and the second adjusting blade 2222 are rotatably connected to the second connecting rod 2231; the second adjusting plate 2242 actuates the second adjusting blade 2222 to rotate.

[0011] Preferably, the fan assembly 2 further includes a fan 20 and an outer cover 23; the airflow adjustment unit 22 and the outer cover 23 are respectively disposed on both sides of the mounting base 21, the fan 20 is installed inside the mounting base 21, and the outer cover 23 is fixedly connected to the mounting base 21, thus enclosing the fan 20 inside the mounting base 21.

[0012] Preferably, a switch 210 is provided on the mounting base 21, the switch 210 is electrically connected to a motor disposed inside the mounting base 21, and the motor shaft of the motor is fixedly connected to the fan 20.

[0013] Preferably, a first grid frame 214 is provided at the rear end of the mounting base 21, and a fixing block 2140 is provided at the center of the first grid frame 214. The motor is provided inside the fixing block 2140, and the motor shaft of the motor is fixedly connected to the fan 20.

[0014] Preferably, the connecting rod 2141 of the first grid frame 214 is a hollow structure, used to realize the electrical connection between the switch 210 and the motor.

[0015] Preferably, the mounting base 21 is provided with fixing arms 4 on both sides, and the end of the fixing arm 4 is provided with a snap-fit ​​plate 40. The mounting base 21 is provided with snap-fit ​​protrusions 215 on both sides, and the snap-fit ​​protrusions 215 are provided with snap-fit ​​grooves 2150. The snap-fit ​​plate 40 snaps into the snap-fit ​​grooves 2150.

[0016] Preferably, the top end of the fixed arm 4 is provided with a first mounting buckle 41, which is used to allow the elastic band 5 to pass through so that the fan assembly 2 is fitted onto the safety helmet 1.

[0017] Preferably, a connecting ring 212 is machined on one end face of the mounting base 21, and an annular groove 2120 is provided on the connecting ring 212. An annular protrusion 2200 corresponding to the annular groove 2120 is provided on the inner surface of the outer shell 220, and the annular protrusion 2200 is rotatably connected to the annular groove 2120.

[0018] Preferably, the first adjusting blade 2221 is provided with a first round rod 2223, and the first adjusting plate 2241 is provided with a first shift fork 2243, with the first round rod 2223 abutting against the first shift fork 2243; the second adjusting blade 2222 is provided with a second round rod 2224, and the second adjusting plate 2242 is provided with a second shift fork 2244, with the second round rod 2224 abutting against the second shift fork 2244.

[0019] Preferably, the outer casing 220 is provided with a guide groove 2203, and the adjusting plate 224 is slidably connected to the guide groove 2203.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows: Firstly, by using an external fan assembly 2 and attaching the fan assembly 2 to the safety helmet 1, the problem of drilling holes in the safety helmet 1 for installation, which reduces the safety performance of the safety helmet 1, is avoided in existing products; furthermore, since the safe service life of the safety helmet 1 currently produced on the market cannot exceed three and a half years, and the safety helmet 1 that exceeds the service life will be scrapped, the fan assembly 2 is set separately from the safety helmet 1, so that the fan assembly 2 can still be used after the safety helmet 2 is scrapped.

[0021] Secondly, by dividing the fan blades 221 in the airflow adjustment unit 22 into a first group of blades 2210 and a second group of blades 2211, and independently controlling the first group of blades 2210 and the second group of blades 2211 respectively, since the mounting base 21 and the outer shell 220 are rotatably connected, the airflow direction can be adjusted 360° in one or two directions. This makes it convenient for users to adjust the airflow direction according to actual needs or changes in the working environment when using the fan assembly 2, so that the cooling effect of the fan assembly 2 can reach the best state. For example, focusing on blowing the air from the neck to the back, or focusing on blowing the area inside the helmet, or even directing the airflow to one side of the head (especially suitable for situations where the temperature is higher on one side of the working environment). Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly described below. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of a helmet fan assembly with multiple blowing modes provided in an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of a fan assembly for a helmet fan assembly with multiple blowing modes provided in an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the fan blades of a helmet fan assembly with multiple blowing modes provided in an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the connecting rod of a helmet fan assembly with multiple blowing modes provided in an embodiment of the present invention;

[0027] Figure 4a This is a schematic diagram of the notch in the connection hole of a helmet fan assembly with multiple blowing modes provided in an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram showing the distance between the round rod and the rotating shaft of a helmet fan assembly with multiple blowing modes provided in an embodiment of this utility model;

[0029] Figure 6 This is a schematic diagram of the first and second set of blades of a helmet fan assembly with multiple blowing modes provided in an embodiment of the present invention;

[0030] Figure 7This is a schematic diagram of the first and second round rods of a helmet fan assembly with multiple blowing modes provided in an embodiment of the present invention;

[0031] Figure 8a This is a schematic diagram of the annular groove and annular protrusion of a helmet fan assembly with multiple blowing modes provided in an embodiment of this utility model;

[0032] Figure 8b This is a schematic diagram of a semi-circular annular protrusion of a helmet fan assembly with multiple blowing modes provided in an embodiment of the present invention.

[0033] Figure 8c This is a schematic diagram of a lock-shaped annular protrusion of a helmet fan assembly with multiple blowing modes provided in an embodiment of the present invention;

[0034] Figure 9 This is a schematic diagram of the second grid frame of a helmet fan assembly with multiple blowing modes provided in an embodiment of the present invention;

[0035] Figure 10 This is a schematic diagram of the gap between the fan blades and the outer shell when all the fan blades of a helmet fan assembly with multiple blowing modes are tilted to one side, according to an embodiment of this utility model.

[0036] Figure 11 This is a schematic diagram of a shielding block for a helmet fan assembly with multiple blowing modes provided in an embodiment of the present invention;

[0037] Figure 12 This is a schematic diagram of the switch of a helmet fan assembly with multiple blowing modes provided in an embodiment of the present invention;

[0038] Figure 13 This is a schematic diagram of the first grid frame of a helmet fan assembly with multiple blowing modes provided in an embodiment of the present invention;

[0039] Figure 14 This is a schematic diagram of the fixing arm of a helmet fan assembly with multiple blowing modes provided in an embodiment of the present invention;

[0040] Figure 15 This is a schematic diagram of the snap-fit ​​plate and slot of a helmet fan assembly with multiple blowing modes provided in an embodiment of the present invention;

[0041] Figure 16 This is a schematic diagram of the first mounting buckle and elastic band of a helmet fan assembly with multiple blowing modes provided in an embodiment of the present invention;

[0042] Figure 17This is a schematic diagram showing the contact between the limiting plate and the safety helmet of a helmet fan assembly with multiple blowing modes provided in this embodiment of the utility model;

[0043] Figure 18 This is a schematic diagram of the battery of a helmet fan assembly with multiple blowing modes provided in an embodiment of the present invention;

[0044] Figure 19 This is a schematic diagram of a mounting plate for a helmet fan assembly with multiple blowing modes, provided in an embodiment of this utility model. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0046] Unless the context otherwise requires, throughout the specification and claims, the term "comprising" is interpreted as openly inclusive, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples" are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples; that is, although they may be incorporated into embodiments or examples using the above terms for reasons such as order and position, it does not limit them to be incorporated in combination by a single embodiment or example.

[0047] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this disclosure 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. Therefore, they should not be construed as limitations on this disclosure.

[0048] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more. Furthermore, for example, the description may use the prefix "A" or "B" to describe the same type of nouns as two independent entities. In this case, the features defined with "A" and "B" are used only to distinguish between similar entities and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features.

[0049] In describing some embodiments, the terms "coupled," "coupled," and "connected," and their derivative expressions, may be used. For example, the term "connected" may be used in describing some embodiments to indicate that two or more components have direct physical or electrical contact with each other. Similarly, the term "coupled" may be used in describing some embodiments to indicate that two or more components have direct physical or electrical contact. However, the terms "connected" or "coupled" may also refer to two or more components that do not have direct contact with each other but still cooperate or interact with each other, such as "optical coupling" or "wireless connection." The embodiments disclosed herein are not necessarily limited to the scope of this invention.

[0050] In the description of this utility model, the expression "A and / or B" (where A and B are used to formally represent specific features) will be involved. The corresponding expression includes the following three combinations: only A, only B, and a combination of A and B.

[0051] As used in this invention, “about,” “approximately,” or “approximately” includes the stated value and the average value within an acceptable range of deviation from the specified value, wherein the acceptable range of deviation is determined by a person skilled in the art taking into account the measurement under discussion and the error associated with the measurement of the specified quantity (i.e., the limitations of the measurement system).

[0052] Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0053] Example 1:

[0054] This utility model embodiment provides a helmet fan assembly with multiple blowing modes, such as... Figure 1 As shown, it includes: a safety helmet 1 and a fan assembly 2; the fan assembly 2 is fitted onto the safety helmet 1. Figure 2 and Figure 3As shown, the fan assembly 2 includes a mounting base 21 and an airflow adjustment unit 22. The airflow adjustment unit 22 includes a housing 220, multiple fan blades 221, adjusting blades 222, a connecting rod 223, and an adjusting plate 224. The two ends of the fan blades 221 and the adjusting blades 222 are rotatably connected to the housing 220. Both the fan blades 221 and the adjusting blades 222 are rotatably connected to the connecting rod 223. The adjusting plate 224 is slidably connected to the housing 220 and is used to move the adjusting blades 222. The mounting base 21 and the housing 220 are rotatably connected. Figure 4 As shown, the adjusting plate 224 is provided with a fork 2240, and the adjusting blade 222 is provided with a round rod 2220. The fork 2240 abuts against the round rod 2220, and the adjusting plate 224 is used to move the adjusting blade 222. Both the fan blade 221 and the adjusting blade 222 are provided with a connecting shaft 2212 for connecting to the connecting rod 223. The connecting shaft 2212 is located on the upper end face of the fan blade 221 and the adjusting blade 222. The connecting rod 223 is provided with a connecting hole 2230, which is rotatably connected to the connecting shaft 2212. On the other hand, in order to ensure that the adjusting blade 222 can rotate smoothly when the fork 2240 moves the round rod 2220, as... Figure 5 As shown, the center of the round rod 2220 and the center of the rotation axis at both ends of the bottom of the adjusting blade 222 are not on the same straight line, but are offset by a certain distance L. In order to install the connecting rod 223 with the round rod 2220, as follows: Figure 4a As shown, the connecting hole 2230 of the connecting rod 223 is provided with a notch 2231. The edge of the notch 2231 is machined with rounded corners. When installing the connecting rod 223 and the round rod 2220, the round rod 2220 is aligned with the notch 2231, and a pushing force is applied to the round rod 2220 and the connecting rod 223, so that the round rod 2220 slides into the connecting hole 2230 along the rounded corner of the notch 2231, thus completing the installation.

[0055] To allow for greater flexibility in airflow direction of fan assembly 2, adapting to a wider range of operating scenarios, such as... Figure 6As shown, the adjusting blade 222 includes a first adjusting blade 2221 and a second adjusting blade 2222; the connecting rod 223 includes a first connecting rod 2230 and a second connecting rod 2231; the adjusting plate 224 includes a first adjusting plate 2241 and a second adjusting plate 2242; the fan blade 221 is evenly divided into a first group of blades 2210 and a second group of blades 2211; the first group of blades 2210 and the first adjusting blade 2221 are both rotatably connected to the first connecting rod 2230, and the first adjusting plate 2241 actuates the first adjusting blade 2221; the second group of blades 2211 and the second adjusting blade 2222 are both rotatably connected to the second connecting rod 2231, and the second adjusting plate 2242 actuates the second adjusting blade 2222. Specifically, as... Figure 7 As shown, a first round rod 2223 is provided on the first adjusting blade 2221, and a first shift fork 2243 is provided on the first adjusting plate 2241, with the first round rod 2223 abutting against the first shift fork 2243; a second round rod 2224 is provided on the second adjusting blade 2222, and a second shift fork 2244 is provided on the second adjusting plate 2242, with the second round rod 2224 abutting against the second shift fork 2244. By dividing the fan blades 221 into two groups, and independently controlling the first group of blades 2210 and the second group of blades 2211 using the first adjusting blade 2221 and the second adjusting blade 2222 respectively, ... Figure 6 Taking the orientation shown as an example, when the fan blade 221 is in a horizontal state, the following wind directions can be selected:

[0056] Tilt all the first group of blades 2210 and the second group of blades 2211 upward to obtain a unidirectional upward wind direction;

[0057] Tilt all the first group of blades 2210 and the second group of blades 2211 downward to obtain a unidirectional downward wind direction;

[0058] By centering the first group of blades 2210 and the second group of blades 2211, a unidirectional positive wind direction is obtained.

[0059] Tilt the first set of blades 2210 downwards and tilt the second set of blades 2211 upwards to obtain wind directions in both upward and downward directions;

[0060] The first set of blades 2210 is tilted downwards, and the second set of blades 2211 is positioned in the center, resulting in wind directions in both the downward and forward directions.

[0061] In order to enable unidirectional or bidirectional airflow from fan assembly 2 in any direction, such as Figure 8aAs shown, a connecting ring 212 is machined on one end face of the mounting base 21, and an annular groove 2120 is provided on the connecting ring 212. An annular protrusion 2200 corresponding to the annular groove 2120 is provided on the inner surface of the outer shell 220. The annular protrusion 2200 is rotatably connected to the annular groove 2120. The outer shell 220 is made of a material capable of slight elastic deformation. During installation, pushing the surface of the annular protrusion 2200 of the outer shell 220 towards the surface of the annular groove 2120 of the mounting base 21 engages the annular protrusion 2200 and the annular groove 2120, allowing the outer shell 220 to rotate relative to the mounting base 21. To ensure that the outer casing 220 remains relatively fixed to the mounting base 21 after being rotated to a preset position, the outer wall of the outer casing 220 is covered with a silicone layer. The end face near the annular protrusion 2200 is also covered with a silicone layer to increase the friction between the end face near the annular protrusion 2200 and the end face of the mounting base 21 where the connecting ring 212 is machined, thus ensuring that the outer casing 220 remains relatively fixed to the mounting base 21 after being rotated to the preset position. Figure 8b The diagram shows the snap-fit ​​connection between the annular protrusion 2200 and the annular groove 2120. This structure allows for 360° adjustment of the wind direction and is suitable for various working scenarios. The annular protrusion 2200 can be semi-circular or... Figure 8c The lock head shown is designed with a semi-circular annular protrusion 2200 for easier disassembly, taking into account the subsequent maintenance of the wind direction adjustment unit 22.

[0062] Firstly, by using an external fan assembly 2, which is fitted onto the safety helmet 1, the problem of drilling holes in the safety helmet 1 for installation, which reduces the safety performance of the safety helmet 1, is avoided in existing products. Furthermore, since the safe service life of the safety helmet 1 currently produced on the market cannot exceed three and a half years, and the safety helmet 1 that exceeds its service life will be scrapped, the fan assembly 2 is set separately from the safety helmet 1, so that the fan assembly 2 can still be used after the safety helmet 2 is scrapped. Secondly, by dividing the fan blades 221 in the airflow adjustment unit 22 into a first group of blades 2210 and a second group of blades 2211, and independently controlling the first group of blades 2210 and the second group of blades 2211 respectively, since the mounting base 21 and the outer shell 220 are rotatably connected, the airflow direction can be adjusted 360° in one or two directions. This makes it convenient for users to adjust the airflow direction according to actual needs or changes in the working environment when using the fan assembly 2, so that the cooling effect of the fan assembly 2 can reach the best state. For example, focusing on blowing the air from the neck to the back, or focusing on blowing the area inside the helmet, or even directing the airflow to one side of the head (especially suitable for situations where the temperature is higher on one side of the working environment).

[0063] Except for mounting base 21 and airflow adjustment unit 22, see Figure 2As shown, the fan assembly 2 also includes a fan 20 and an outer cover 23; the airflow adjustment unit 22 and the outer cover 23 are respectively disposed on both sides of the mounting base 21, the fan 20 is installed inside the mounting base 21, and the outer cover 23 is fixedly connected to the mounting base 21, enclosing the fan 20 inside the mounting base 21.

[0064] The above solution mentions that the adjusting plate 224 is slidably connected to the outer casing 220, see details below. Figure 4 As shown, the outer shell 220 is provided with a guide groove 2203, and the adjusting plate 224 is slidably connected to the guide groove 2203. Since the outer shell 220 directly contacts human skin, for wearing comfort, the main body of the outer shell 220 can be made of hard plastic, covered with a layer of silicone to reduce discomfort from the hard plastic rubbing against the skin. Furthermore, soft silicone is also covered around the guide groove 2203 to increase the friction between the adjusting plate 224 and the guide groove 2203. When the guide groove 2203 is in the vertical direction, the adjusting plate 224 can maintain stability within the guide groove 2203 due to upward friction and will not slide downwards.

[0065] To prevent the fan blades 221, adjusting blades 222, connecting rods 223, and adjusting plates 224 from being completely exposed on the surface of the housing 220, such as Figure 9 As shown, a second mesh frame 2205 is provided on the rear end face of the outer casing 220. The second mesh frame 2205 and the mounting base 21 enclose the fan blade 221, the adjusting blade 222, the connecting rod 223, and the adjusting plate 224 within the outer casing 220 to prevent other objects from directly contacting the fan blade 221, the adjusting blade 222, the connecting rod 223, and the adjusting plate 224, thereby preventing damage. In addition, as... Figure 10 As shown in the dashed box, when the fan blades 221 are all biased towards one side of the housing 220, there is a large gap on the other side of the housing 220. Since this gap is obscured by the circular outline of the housing 220, the rotation range of the adjusting blades 222 in this area is greatly limited. Therefore, it is not suitable to place the fan blades 221 in this area. Based on this, as... Figure 11 As shown, Figure 10 In the cross-sectional view along section line AA, two inclined shielding blocks 2204 are provided on the inner side of the outer casing 220. Taking the orientation shown in the figure as an example, the inclined surfaces of the shielding blocks 2204 slope upwards from the second grid frame 2205 towards the other end of the outer casing 220. By shielding the gap between the fan blade 221 and the outer casing 220 with the shielding blocks 2204, wind is prevented from blowing directly out of the gap, thus avoiding any adverse impact on the safety of the workers.

[0066] In order to drive the fan 20 to rotate, such as Figure 12As shown, a switch 210 is installed inside the mounting base 21. The switch 210 is electrically connected to a motor (not shown) installed inside the mounting base 21, and the motor shaft of the motor is fixedly connected to the fan 20. The switch 210 is located at the lower end of the mounting base 21 and is enclosed in a soft rubber shell. The switch is located at the bottom of the soft rubber shell. Pressing the soft rubber shell upwards, i.e., pressing down the switch 210, can start or stop the switch 210 to control the rotation or stop of the fan 20.

[0067] To avoid exposing the wires used for electrical connection between switch 210 and the motor, such as Figure 13 As shown, a first grid frame 214 is provided at the rear end of the mounting base 21. A fixing block 2140 is provided at the center of the first grid frame 214. A motor is provided inside the fixing block 2140, and the motor shaft of the motor is fixedly connected to the fan 20. When the switch 210 is turned on, the motor starts to work and drives the fan 20 to rotate. Furthermore, the connecting rod 2141 of the first grid frame 214 has a hollow structure, used to achieve an electrical connection between the switch 210 and the motor. The connecting wire between the switch 210 and the motor can pass through the hollow part of the connecting rod 2141 to achieve an electrical connection.

[0068] As mentioned in the aforementioned solution, the fan assembly 2 is fitted onto the safety helmet 1. To ensure stability when the fan assembly 2 is fitted onto the safety helmet 1, as follows: Figure 14 and Figure 15 As shown, fixing arms 4 are respectively provided on both sides of the mounting base 21, and a snap-fit ​​plate 40 is provided at the end of the fixing arm 4. Snap-fit ​​protrusions 215 are correspondingly provided on both sides of the mounting base 21, and snap-fit ​​grooves 2150 are provided on the snap-fit ​​protrusions 215. The snap-fit ​​plate 40 snaps into the snap-fit ​​grooves 2150; wherein, as... Figure 15 As shown, the inner side of the snap-fit ​​plate 40 is provided with a protrusion 400 to prevent the snap-fit ​​plate 40 from coming off after it is snapped into the snap-fit ​​slot 2150. (See reference...) Figure 14 and Figure 16 As shown, the top end of the fixing arm 4 is provided with a first mounting buckle 41, which is used to allow the elastic band 5 to pass through so that the fan assembly 2 is fitted onto the safety helmet 1. If only the fixing arms 4 on both sides are used to install and fix the fan assembly 2 as a whole, it is not sufficient to achieve complete stability of the fan assembly 2. A limiting plate 216 is also provided on the top of the mounting base 21. The limiting plate 216 is Z-shaped, with one end fixedly connected to the mounting base 21, and the other end of the limiting plate 216 provided with a fixing buckle 2160 for allowing the elastic band 5 to pass through. Figure 17 As shown, when the fan assembly 2 is fitted onto the safety helmet 1, the Z-shaped inclined surface of the limiting plate 216 abuts against the brim of the safety helmet 1, thereby further stabilizing the fan assembly 2.

[0069] To facilitate power supply to the motor connected to fan 20, such as Figure 16 and Figure 18 As shown, the fan assembly 2 is equipped with a battery 6, which is fixed above the mounting base 21. The battery 6 is connected in series with the switch 210 and a motor (not shown) disposed inside the mounting base 21. The switch 210 controls the circuit connection between the battery 6 and the motor. A mounting plate 7 is provided between the battery 6 and the limiting plate 216 of the mounting base 21, forming a detachable connection between the battery 6 and the mounting plate 7. Second mounting buckles 70 are provided at both ends of the mounting plate 7, which allow the elastic band 5 (for ease of showing the second mounting buckle 70) to pass through. Figure 19 The elastic band 5 is not shown in the image; please refer to [the original text]. Figure 16 The elastic band 5 shown passes through to secure the mounting plate 7. The mounting plate 7 has a receiving groove 71 in which the battery 6 is placed. When the battery 6 is depleted, the operator can remove it and replace it with a new one. Conductive spring contacts (not shown in the figure) are provided on both sides of the receiving groove 71 for electrical connection with the battery 6; these conductive spring contacts are also connected in series with the motor via wires.

[0070] In practical applications, the size, quantity, and position of the fan assembly 2 on the safety helmet 1 can be selected based on the motor power and model, the wearer's comfort, and cost.

[0071] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A helmet fan assembly with multiple blowing modes, characterized in that, include: A safety helmet (1) and a fan assembly (2); the fan assembly (2) is fitted onto the safety helmet (1); The fan assembly (2) includes a mounting base (21) and an airflow adjustment unit (22). The airflow adjustment unit (22) includes a housing (220), multiple fan blades (221), an adjustment blade (222), a connecting rod (223), and an adjustment plate (224). The two ends of the fan blades (221) and the adjustment blades (222) are respectively rotatably connected to the housing (220). The fan blades (221) and the adjustment blades (222) are both rotatably connected to the connecting rod (223). The adjustment plate (224) is slidably connected to the housing (220) and is used to move the adjustment blades (222). The mounting base (21) and the housing (220) are rotatably connected. The adjusting blade (222) includes a first adjusting blade (2221) and a second adjusting blade (2222), the connecting rod (223) includes a first connecting rod (2230) and a second connecting rod (2231), the adjusting plate (224) includes a first adjusting plate (2241) and a second adjusting plate (2242), the fan blade (221) is evenly divided into a first group of blades (2210) and a second group of blades (2211); the first group of blades (2210) and the first adjusting blade (2221) are rotatably connected to the first connecting rod (2230), and the first adjusting plate (2241) actuates the first adjusting blade (2221) to rotate; the second group of blades (2211) and the second adjusting blade (2222) are rotatably connected to the second connecting rod (2231), and the second adjusting plate (2242) actuates the second adjusting blade (2222) to rotate.

2. The helmet fan assembly with multiple blowing modes according to claim 1, characterized in that, The fan assembly (2) further includes a fan (20) and an outer cover (23); the air direction adjustment unit (22) and the outer cover (23) are respectively disposed on both sides of the mounting base (21), the fan (20) is installed inside the mounting base (21), and the outer cover (23) is fixedly connected to the mounting base (21) to enclose the fan (20) inside the mounting base (21).

3. The helmet fan assembly with multiple blowing modes according to claim 2, characterized in that, A switch (210) is provided on the mounting base (21). The switch (210) is electrically connected to a motor located inside the mounting base (21). The motor shaft of the motor is fixedly connected to the fan (20).

4. The helmet fan assembly with multiple blowing modes according to claim 3, characterized in that, The rear end of the mounting base (21) is provided with a first grid frame (214), and a fixing block (2140) is provided at the center of the first grid frame (214). The motor is provided inside the fixing block (2140), and the motor shaft of the motor is fixedly connected to the fan (20).

5. The helmet fan assembly with multiple blowing modes according to claim 4, characterized in that, The connecting rod (2141) of the first grid frame (214) is a hollow structure, used to realize the electrical connection between the switch (210) and the motor.

6. The helmet fan assembly with multiple blowing modes according to claim 1, characterized in that, The mounting base (21) is provided with fixing arms (4) on both sides respectively. The fixing arms (4) are provided with snap-fit ​​plates (40) at their ends. The mounting base (21) is provided with snap-fit ​​protrusions (215) on both sides respectively. The snap-fit ​​protrusions (215) are provided with slots (2150). The snap-fit ​​plates (40) are snapped into the slots (2150).

7. The helmet fan assembly with multiple blowing modes according to claim 6, characterized in that, The top end of the fixed arm (4) is provided with a first mounting buckle (41), which is used to allow the elastic band (5) to pass through so that the fan assembly (2) is fitted onto the safety helmet (1).

8. The helmet fan assembly with multiple blowing modes according to any one of claims 1-7, characterized in that, A connecting ring (212) is machined on one end face of the mounting base (21), and an annular groove (2120) is provided on the connecting ring (212). An annular protrusion (2200) corresponding to the annular groove (2120) is provided on the inner surface of the outer shell (220), and the annular protrusion (2200) is rotatably connected to the annular groove (2120).

9. The helmet fan assembly with multiple blowing modes according to any one of claims 1-7, characterized in that, The first adjusting blade (2221) is provided with a first round rod (2223), and the first adjusting plate (2241) is provided with a first shift fork (2243), the first round rod (2223) abuts against the first shift fork (2243); the second adjusting blade (2222) is provided with a second round rod (2224), and the second adjusting plate (2242) is provided with a second shift fork (2244), the second round rod (2224) abuts against the second shift fork (2244).

10. The helmet fan assembly with multiple blowing modes according to any one of claims 1-7, characterized in that, The outer casing (220) is provided with a guide groove (2203), and the adjusting plate (224) is slidably connected to the guide groove (2203).

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