Helmet fan assembly capable of being adjusted in multiple directions

Abstract

The utility model relates to the technical field of safety helmets, in particular to a fan assembly capable of being adjusted in multiple directions 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, a connecting rod and an adjusting plate, the two ends of the fan blades and the adjusting blades are rotationally connected with the shell, the fan blades and the adjusting blades are rotationally connected with the connecting rod, and the adjusting plate is slidably connected with the shell and used for shifting the adjusting blades; a connecting circular ring is machined on one end face of the mounting base, a circular groove is formed in the connecting circular ring, an annular protrusion corresponding to the circular groove is arranged on the inner surface of the shell, and the annular protrusion is rotationally connected with the circular groove. The wind direction adjusting unit is arranged in the fan assembly, so that a user can conveniently adjust the wind direction according to actual requirements or the change of the working environment when using the fan, and the cooling effect of the fan reaches the optimal state.

Description

Technical Field

[0001] This utility model relates to the field of safety helmet technology, and in particular to a multi-directional adjustable helmet fan assembly. 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 multi-directional adjustable helmet fan assembly, 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, a plurality of 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.

[0010] 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.

[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 has a hollow structure, which is 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, the adjusting plate 224 is provided with a fork 2240, and the adjusting blade 222 is provided with a round rod 2220, and the fork 2240 abuts against the round rod 2220.

[0018] 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.

[0019] Preferably, the spacing between each pair of the fan blade 221 and the adjusting blade 222 is equal.

[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, a wind direction adjustment unit 22 is provided in the fan assembly 2, especially the outer shell 220 of the wind direction adjustment unit 22. By providing an annular protrusion 2200 on the outer shell 220 that corresponds to the annular groove 2120, the outer shell 220 can rotate freely in 360°, which makes it convenient for the user to adjust the wind 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 a better state, such as focusing on blowing the wind from the neck to the back, or focusing on blowing the area inside the helmet on the top of the head. 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 multi-directional adjustable helmet fan assembly provided in an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of a fan assembly of a multi-directional adjustable helmet fan assembly provided in an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the airflow adjustment unit of a multi-directional adjustable helmet fan assembly provided in this embodiment of the present invention;

[0026] Figure 4 This invention provides a multi-directional adjustable helmet fan assembly. Figure 3 Exploded view;

[0027] Figure 4a This is a schematic diagram of the notch in the connection hole of a multi-directional adjustable helmet fan assembly provided in this 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 multi-directional adjustable helmet fan assembly provided in this embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the second mesh frame of a multi-directional adjustable helmet fan assembly provided in an embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of the gap between the fan blades and the outer shell of a helmet fan assembly that is adjustable in multiple directions, provided in an embodiment of this utility model.

[0031] Figure 8 This invention provides a multi-directional adjustable helmet fan assembly. Figure 7 Sectional view of AA section line;

[0032] Figure 9 This is a schematic diagram of the annular protrusion and annular groove of a multi-directional adjustable helmet fan assembly provided in this embodiment of the present invention;

[0033] Figure 10 This is a schematic diagram of an annular protrusion of a multi-directional adjustable helmet fan assembly provided in an embodiment of the present invention;

[0034] Figure 11 This is a schematic diagram of a lock-shaped annular protrusion of a multi-directional adjustable helmet fan assembly provided in an embodiment of the present invention;

[0035] Figure 12 This is a schematic diagram of the switch for a multi-directional adjustable helmet fan assembly provided in an embodiment of the present invention;

[0036] Figure 13 This is a schematic diagram of the first mesh frame of a multi-directional adjustable helmet fan assembly provided in an embodiment of the present invention;

[0037] Figure 14 This is a schematic diagram of the fixing arm of a multi-directional adjustable helmet fan assembly provided in an embodiment of the present invention;

[0038] Figure 15This is a schematic diagram of the snap-fit ​​plate and slot of a multi-directional adjustable helmet fan assembly provided in an embodiment of the present invention;

[0039] Figure 16 This is a schematic diagram of the first mounting buckle and elastic band of a multi-directional adjustable helmet fan assembly provided in an embodiment of this utility model;

[0040] Figure 17 This is a schematic diagram showing the contact between the limiting plate of a multi-directional adjustable helmet fan assembly and a safety helmet, as provided in this embodiment of the utility model.

[0041] Figure 18 This is a schematic diagram of a battery supplying power to a multi-directional adjustable helmet fan assembly according to an embodiment of the present invention.

[0042] Figure 19 This is a schematic diagram of a mounting plate for a multi-directional adjustable helmet fan assembly provided in an embodiment of this utility model. Detailed Implementation

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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).

[0050] 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.

[0051] Example 1:

[0052] Embodiment 1 of this utility model provides a multi-directional adjustable helmet fan assembly, 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 3 As 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. To facilitate the moving of the adjusting blades 222 by the adjusting plate 224, as follows... 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. 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, to ensure smooth rotation of the adjusting blade 222 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, and they are offset by a certain distance L. In order to enable the fan blade 221 and the adjusting blade 222 to rotate synchronously and at the same angle, the distance between each pair of the fan blade 221 and the adjusting blade 222 is equal.

[0053] In order to install connecting rod 223 with round rod 2220, such as 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.

[0054] Except for mounting base 21 and airflow adjustment unit 22, see Figure 2 As 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.

[0055] 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.

[0056] 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 6 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 7 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 fan blades 221 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 8 As shown, Figure 7 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.

[0057] The above solution mentions that the wind direction adjustment unit 22 is rotatably connected to the mounting base 21. Since the wind direction that the adjustment blade 222 can adjust is limited, in order to adapt to the wind direction required by more working scenarios, in one embodiment, such as... Figure 9 and Figure 10 As 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. When it is necessary to change the wind direction, rotating the outer shell 220 will change the wind direction. The annular protrusion 2200 can be semi-circular or... Figure 11 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.

[0058] In practical applications, the outer shell 220 is made of a material capable of slight elastic deformation. During installation, the annular protrusion 2200 of the outer shell 220 is pushed towards the annular groove 2120 of the mounting base 21, thus engaging the annular protrusion 2200 and the annular groove 2120. The outer shell 220 can then be rotated relative to the mounting base 21. To ensure that the outer shell 220 remains relatively fixed to the mounting base 21 after rotating to a preset position, the outer wall of the outer shell 220 is covered with a silicone layer. The end face near the annular protrusion 2200 is also covered with a silicone layer to increase 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 shell 220 remains relatively fixed to the mounting base 21 after rotating to the preset position.

[0059] According to the above solution, firstly, by using an external fan 20 and attaching it 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 its service life will be scrapped, the fan assembly 2 is separated from the safety helmet 1. After the safety helmet 2 is scrapped, the fan 20 can still continue to be used. Secondly, a wind direction adjustment unit 22 is provided in the fan assembly 2, especially the outer shell 220 of the wind direction adjustment unit 22. By providing an annular protrusion 2200 on the outer shell 220 corresponding to the annular groove 2120, the outer shell 220 can rotate freely in 360°, which makes it convenient for the user to adjust the wind direction according to actual needs or changes in the working environment when using the fan 20, so that the cooling effect of the fan 20 can reach the best state. For example, focus on blowing the wind from the neck to the back, or focus on blowing the top area inside the helmet, or even direct the airflow to one side of the head (especially suitable for situations where the temperature on one side of the working environment is high).

[0060] In order to drive the fan 20 to rotate, such as Figure 12 As 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.

[0061] 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.

[0062] 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 15As 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.

[0063] To facilitate power supply to the motor connected to fan 20, such as Figure 18 and Figure 19 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 18 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.

[0064] 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.

[0065] 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 multi-directional adjustable helmet fan assembly, 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). The adjustment plate (224) is used to move the adjustment blades (222). 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).

2. The multi-directional adjustable helmet fan assembly 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 multi-directional adjustable helmet fan assembly 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 multi-directional adjustable helmet fan assembly 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 multi-directional adjustable helmet fan assembly 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 multi-directional adjustable helmet fan assembly 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 multi-directional adjustable helmet fan assembly 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 multi-directional adjustable helmet fan assembly according to any one of claims 1-7, characterized in that, 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).

9. The multi-directional adjustable helmet fan assembly 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).

10. The multi-directional adjustable helmet fan assembly according to any one of claims 1-7, characterized in that, The distance between each pair of the fan blade (221) and the adjusting blade (222) is equal.

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