An air blowing mechanism

Abstract

The utility model belongs to ventilation protective helmet or ventilation welding face guard technical field discloses a kind of air supply mechanism, including headband and the air pipe of outer connector, headband is provided with the left let -by slot of left side at wearer, air pipe includes left pipeline that starting end is connected with outer connector, left pipeline passes through left let -by slot and is fixedly connected with headband at wearer forehead area, left pipeline is provided with vent;And / or, headband is provided with the right let -by slot of right side at wearer, air pipe includes right pipeline that starting end is connected with outer connector, right pipeline passes through right let -by slot and is fixedly connected with headband at wearer forehead area, right pipeline is provided with vent.The utility model's air supply mechanism, the stability of air pipe can be maintained, avoid the mutual interference between air pipe and other components.

Description

Technical Field

[0001] This utility model belongs to the technical field of ventilated protective helmets or ventilated welding masks, and particularly relates to an air supply mechanism. Background Technology

[0002] In many fields such as industrial production, construction, outdoor work, and the military, protective helmets and welding masks are essential equipment for ensuring the safety of personnel's heads. With the development of technology and the increasing demand for comfortable working environments, ventilated protective helmets have emerged, which allow air circulation through ventilation ducts to provide a comfortable head environment for the wearer.

[0003] An improperly designed ventilation duct layout can cause pressure and friction on other internal components of the helmet. For example, if the bends in the ventilation duct press directly against the cushioning pad, it can not only cause localized deformation of the pad, affecting its ability to cushion impacts and reducing the helmet's safety protection, but also potentially damage the pad due to prolonged friction, shortening its lifespan.

[0004] Secondly, an unreasonable ventilation duct layout can easily interfere with the wearer's eyes and other critical areas. For example, if the ventilation duct is located close to the eyes, exhaled moisture can easily condense near the eyes after flowing along the duct, obstructing vision and posing a significant threat to the safety of work and movement.

[0005] Furthermore, improper layout of the ventilation ducts and helmet securing devices can also affect each other. For example, the securing devices may obstruct the smooth flow of air within the ventilation ducts, resulting in poor ventilation. Conversely, a cluttered layout of the ventilation ducts may hinder the stability of the securing devices, reducing the overall stability of the helmet and even causing it to loosen or shift during certain activities, thus failing to adequately protect the wearer's safety and user experience. In addition, poorly positioned ventilation ducts can affect ventilation efficiency. For instance, if the ventilation duct openings are concentrated on one side of the helmet, it will not allow for all-around airflow, causing localized stuffiness on the wearer's head. This can significantly impact comfort during prolonged work and may even lead to heatstroke.

[0006] An improperly designed ventilation duct layout can interfere with the wearer's normal activities, pose safety hazards to workers, and impair their ability to observe and judge their surroundings. Furthermore, if the ventilation duct layout conflicts with the helmet's internal cushioning structure, it not only hinders smooth airflow but may also compress the cushioning layer, reducing the helmet's original protective performance and failing to effectively protect the head in the event of an accident. Therefore, a well-planned ventilation duct layout is crucial.

[0007] Furthermore, the thick and heavy material of the ventilation duct adds to the overall weight of the helmet. The complex structure of the ventilation duct also contributes to the weight, which is detrimental to the pursuit of lightweight and comfortable use. Improperly secured ventilation ducts can cause internal interference. For example, the fixing clips may compress and deform the ventilation duct, or the duct may wobble and rub against other components, reducing performance and comfort.

[0008] In view of this, it is necessary to further improve and optimize the air supply mechanism to meet the high performance requirements of ventilated protective helmets in different application scenarios. Utility Model Content

[0009] To address at least one or more of the technical problems mentioned above, this utility model provides an air supply mechanism, comprising: a headband and an air duct with an external connector; the headband having a left clearance groove located on the left side of the wearer; the air duct including a left pipe whose starting end communicates with the external connector; the left pipe passing through the left clearance groove and being fixedly connected to the headband in the forehead area of ​​the wearer; and the left pipe having a ventilation opening; and / or, the headband having a right clearance groove located on the right side of the wearer; the air duct including a right pipe whose starting end communicates with the external connector; the right pipe passing through the right clearance groove and being fixedly connected to the headband in the forehead area of ​​the wearer; and the right pipe having a ventilation opening.

[0010] According to one embodiment of the present invention, the headband includes a forehead portion surrounding the wearer's forehead region, a back occipital portion surrounding the wearer's occipital region, and a top occipital portion surrounding the wearer's head region. The forehead portion and the back occipital portion are joined on the left side of the wearer's head to form a left joining portion, and joined on the right side of the wearer's head to form a right joining portion. A left connecting portion is provided on the outer surface of the left joining portion, and a left clearance groove is formed between the left joining portion and the left connecting portion. A left conduit passes through the left clearance groove and extends along the forehead portion to be fixedly connected to the forehead portion. And / or, a right connecting portion is provided on the outer surface of the right joining portion, and a right clearance groove is formed between the right joining portion and the right connecting portion. A right conduit passes through the right clearance groove and extends along the forehead portion to be fixedly connected to the forehead portion.

[0011] According to one embodiment of the present invention, at least the portion of the duct corresponding to the back of the head is a flexible duct.

[0012] According to one embodiment of the present invention, the end of the left pipe and the end of the right pipe are kept at a distance, and the left pipe and the right pipe are respectively provided with ventilation openings corresponding to the forehead area of ​​the wearer; or, the end of the left pipe and the end of the right pipe are connected, and the left pipe and the right pipe are provided with at least one ventilation opening corresponding to the forehead area of ​​the wearer.

[0013] According to one embodiment of the present invention, the left pipe and / or the right pipe include a tubular skeleton and an outer skin.

[0014] According to one embodiment of the present invention, the tubular skeleton is made of any one of plastic, metal, and carbon fiber; the outer skin is made of any one of cloth, metal foil, polyvinyl chloride, polypropylene, and polyester.

[0015] According to one embodiment of the present invention, the left pipe and / or the right pipe are elastic pipes.

[0016] According to one embodiment of the present invention, the headband further includes a connecting strap; the two ends of the connecting strap are respectively connected to the top of the head and the outer connector.

[0017] According to one embodiment of the present invention, the headband further includes a restraining strap connected at both ends to a connecting strap and an external connector, respectively; the restraining strap surrounds the starting end of the left pipe and / or the starting end of the right pipe, and restrains the starting end of the left pipe and / or the starting end of the right pipe to the external connector.

[0018] According to one embodiment of the present invention, a support frame is provided between the back of the head and the outer connector. The support frame includes a support leg mounted on the back of the head and a support arm that is substantially parallel to the axial direction of the outer connector. The support arm is slidably connected to a support rail mounted on the outer connector or connecting belt.

[0019] According to one embodiment of the present invention, the occipital portion has a first end, a second end, and an adjustment portion between the left and right joint portions; the adjustment portion selectively adjusts the length of the occipital portion by adjusting the relative movement of the first and second ends; and the support leg is mounted on the adjustment portion.

[0020] According to one embodiment of the present invention, a limiting member is provided at the end of the support arm, and the limiting member restricts the sliding displacement of the support arm on the support rail.

[0021] According to one embodiment of the present invention, the vent is provided with an airflow adjustment component; the airflow adjustment component includes a support frame; a rotatable inner shell with an inlet and an outlet is provided inside the support frame, and there is at least one rotation angle such that the inlet of the inner shell is connected to the vent when it rotates, and the outlet partially overlaps with the vent.

[0022] According to one embodiment of the present invention, a rotatable paddle is provided inside the inner shell, and there is at least one rotation angle that changes the wind direction of the inner shell outlet when the paddle rotates; the inner shell is provided with multiple teeth; the paddle is provided with claws that match the teeth; the claws are mounted on the teeth so that the paddle is limited by the cooperation of the claws and teeth when it rotates.

[0023] According to one embodiment of the present invention, the rotation direction of the paddle is not parallel to the rotation direction of the inner shell.

[0024] According to one embodiment of the present invention, the support leg and the support arm are bent backward to form a shock-absorbing bend, thereby extending the length of the support arm.

[0025] According to one embodiment of the present invention, the surface of the support frame is provided with reinforcing ribs in part or all of its parts.

[0026] According to one embodiment of the present invention, the length of the connecting belt is adjustable.

[0027] According to one embodiment of the present invention, the two ends of the top of the head are respectively connected to the left joint and the right joint; the top of the head has a third end and a fourth end between the left joint and the right joint; the third end is provided with a plurality of holes arranged along the length direction; the fourth end is provided with at least one pin arranged along the length direction; the length of the top of the head can be selectively adjusted by adjusting the relative movement of the third end and the fourth end through the cooperation of the pin and the holes.

[0028] According to one embodiment of the present invention, the third end is provided with a collar; the fourth end passes through the collar.

[0029] According to one embodiment of the present invention, the third end further includes a bulge disposed between the hole and the collar, oriented away from the fourth end; the connecting strip includes a fifth end at the top of the connector and a sixth end for connecting the external connector, the fifth end is connected to the bulge, the fifth end is provided with a sleeve hole parallel to the extension direction of the third end, and a positioning post is provided on the inner wall of the sleeve hole; the bulge is provided with at least one positioning hole that matches the positioning post; the third end passes through the sleeve hole, so that the bulge is located inside the sleeve hole, and the positioning post is inserted into the positioning hole to adjust the position of the fifth end.

[0030] The air delivery mechanism provided by this utility model features an air duct that passes through a clearance groove and is tightly fixed to the forehead area of ​​the headband. This maintains the stability of the air duct and prevents interference between the air duct and other components. By making at least the portion of the air duct corresponding to the back of the head flexible, the orientation of the outer connector can be adjusted as needed. The stability of the air duct is improved by providing a support frame to support the outer connector. The support arm of the support frame, in conjunction with the support rail, allows for a certain adjustment range even when the outer connector is supported, accommodating different wearers. The connecting strap further enhances the stability of the air duct. The restraint strap ensures a tight connection between the air duct and the outer connector, further improving the stability of the air duct. The limiting component restricts the maximum displacement of the outer connector, preventing it from detaching. Attached Figure Description

[0031] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0032] Figure 1 A schematic diagram of the air supply mechanism is shown;

[0033] Figure 2 A schematic diagram of the air supply mechanism from another angle is shown;

[0034] Figure 3 A schematic diagram of the headband is shown;

[0035] Figure 4 A schematic diagram of a headband including a support frame and connecting straps is shown;

[0036] Figure 5 An exploded view of the headband, including the support frame and connecting straps, is shown.

[0037] Figure 6 A schematic diagram of the support frame is shown;

[0038] Figure 7 A schematic diagram of the air duct is shown;

[0039] Figure 8 A schematic diagram of the bottom of the air duct is shown;

[0040] Figure 9 A schematic diagram of another air supply structure is shown;

[0041] Figure 10 An exploded view of the duct is shown. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0043] It should be understood that the terms "comprising" and "including" used in the specification and claims of this utility model indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0044] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this specification and claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations.

[0045] It should also be understood that in the specification of this utility model, the directions of front, back, left, right, up, and down refer to the directions from the wearer's perspective.

[0046] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0047] Figure 1 A schematic diagram of the air supply mechanism is shown.

[0048] Figure 2 A schematic diagram of the air supply mechanism from another angle is shown.

[0049] Figure 3 A schematic diagram of the headband is shown.

[0050] Figure 4 A schematic diagram of a headband including a support frame and connecting straps is shown.

[0051] Figure 5 An exploded view of the headband, including the support frame and connecting straps, is shown.

[0052] Figure 6 A schematic diagram of the support frame is shown.

[0053] Figure 7 A schematic diagram of the air duct is shown.

[0054] Figure 8 A schematic diagram of the bottom of the duct is shown.

[0055] like Figures 1 to 8 As shown, the air supply mechanism includes: a headband 1, which includes a forehead portion 11 surrounding the forehead region, a back occipital portion 12 surrounding the occipital region, and a top occipital portion 13 surrounding the top of the head region; the forehead portion 11 and the back occipital portion 12 are joined on the left side of the wearer's head to form a left joining portion 15, and joined on the right side of the wearer's head to form a right joining portion; a left connecting portion 16 is provided on the outer surface of the left joining portion 15, and a left clearance groove 100 is formed between the left joining portion 15 and the left connecting portion 16, and / or a right connecting portion is provided on the outer surface of the right joining portion, and a right clearance groove 200 is formed between the right joining portion and the right connecting portion.

[0056] Figures 1 to 5 The image shows one implementation of the headband. Those skilled in the art will understand that the headband can also be implemented in other equivalent ways, as long as at least one of its left and right sides has a clearance groove to accommodate the air duct.

[0057] like Figure 7 and Figure 8 As shown, the air duct 2 includes an external connector 21 and a left pipe 22 and / or a right pipe 23 whose starting ends are respectively connected to the external connector 21; the left pipe 22 extends along the forehead 11 through the left relief groove 100 and is fixedly connected to the forehead 11; the right pipe 23 extends along the forehead 11 through the right relief groove 200 and is fixedly connected to the forehead 11; the left pipe 22 and / or the right pipe 23 are provided with ventilation openings.

[0058] In this invention, the headband 1 is used to fix the head of the wearer. The left connecting portion 16 and right connecting portion, respectively located on the left and right sides of the headband 1, are used to connect the outer shell of the protective helmet and welding mask, etc. The protective helmet, outer shell, and other equipment are detachably mounted on the left connecting portion 16 and right connecting portion via an angle adjustment component 17. When the wearer wears the headband 1, the forehead portion 11 surrounds and fits against the wearer's forehead area, and the occipital portion 12 surrounds and fits against the wearer's occipital bone area. The forehead portion 11 and the occipital portion 12 form a basic annular circumference that laterally surrounds the wearer's head. The top of the head 13 is connected at both ends to the basic annular circumference formed by the forehead portion 11 and the occipital portion 12, fitting against the top of the wearer's head. Thus, the headband 1 is fixed to the wearer's head as a whole, and the protective helmet, welding mask, etc., connected to the headband 1 are also fixed to the wearer's head.

[0059] Typically, the joints are positioned such that, after the connecting parts are attached to the housing, the center of gravity of the housing falls substantially on the line connecting the left and right joints. Preferably, the left and right joints are symmetrically arranged.

[0060] The two ends of the top of the head 13 can be fixedly or detachably connected to the left joint 15 and the right joint, respectively. The two ends of the joint can also be connected to other positions on the circumference formed by the forehead 11 and the back of the head 12. Preferably, the forehead 11, the back of the head 12, and the top of the head 13 are joined on the left side of the wearer to form the left joint 15, and joined on the right side of the wearer to form the right joint. More preferably, the forehead 11, the back of the head 12, and the top of the head 13 are integrally formed. The headband 1 also includes a connecting strap 14; the two ends of the connecting strap 14 are respectively connected to the top of the head 13 and the outer connector 21.

[0061] The external connector 21 of the air duct 2 is used to connect to the air supply equipment. The gas delivered by the air supply equipment enters the left pipe 22 and / or the right pipe 23 through the external connector 21 and is discharged from the vent to supply the wearer's face mask or helmet. That is, the air duct may include only one side of the pipe or both sides of the pipe. The left and right clearance slots of the headband are set to correspond to the pipes.

[0062] like Figure 5 As shown, the forehead 11 and the back of the head 12 form a left joint 15 on the left side of the wearer's head and a right joint on the right side. Connecting portions, including a left connecting portion 16 and a right connecting portion, are provided on the outer sides of the left and right joints. These connecting portions are used to connect to welding masks, protective helmets, etc., from the left and right sides of the wearer, respectively. The headband 1 adopts a hollow structure to reduce its weight and decrease pressure on the wearer's head.

[0063] like Figure 3 and Figure 5 As shown, a clearance groove is provided between the connecting part and the joint part, including a left clearance groove 100 and a right clearance groove 200. Depending on the arrangement of the air duct, the clearance groove can be provided on the left side, the right side, or both sides simultaneously. The clearance groove is used to accommodate the air duct 2, so that the air duct 2 fits tightly with the head strap 1.

[0064] After passing through the clearance groove, the air duct 2 extends along the forehead 11 and is fixedly connected to the forehead 11. The connection method can be a detachable connection method, such as pin connection, key connection, snap-on connection, etc.

[0065] The air duct 2 includes at least one of a left duct 22 and a right duct 23, preferably both. Ventilation openings are provided at the ends of the left duct 22 and the right duct 23, typically located within the coverage area of ​​the forehead 11. Gas supplied by the air supply device is delivered to the ventilation openings through the left duct 22 and the right duct 23, providing fresh air to the front or side of the wearer's face.

[0066] In this invention, by providing a clearance groove on at least one of the left and right sides of the headband 1, the air duct 2 passes through the clearance groove and fits against the forehead 11, which can fix the headband 1 and the air duct 2 relative to each other, avoid displacement of the air duct 2 caused by adjusting the relative position of the headband 1 and the welded mask shell or protective helmet, and also avoid the air duct 2 interfering with the adjustment of the headband 1.

[0067] like Figure 1 and Figure 2 As shown, at least the portion of the duct 2 corresponding to the back of the head 12 is flexible.

[0068] The portion of the duct 2 corresponding to the back of the head 12 refers to the part that extends backward from the clearance grooves on both sides until it connects with the external connector 21. The use of a flexible material allows this portion of the duct 2 to deform, thereby adjusting the distance between it and the back of the head 12, as well as the orientation of the external connector 21, by adjusting its warping angle.

[0069] like Figure 5 As shown, the occipital portion 12 has a first end 121, a second end 122 and an adjustment portion 123 between the left joint portion 15 and the right joint portion; the adjustment portion 123 selectively adjusts the length of the occipital portion 12 by adjusting the relative movement of the first end 121 and the second end 122.

[0070] Figure 6 A schematic diagram of the support frame is shown.

[0071] Figure 8 A schematic diagram of the bottom of the duct is shown.

[0072] like Figure 4 , Figure 5 , Figure 6 and Figure 8 As shown, the air supply mechanism also includes a support frame 3, which includes a support leg 31 mounted on the adjustment section 123 and a support arm 32 that is substantially parallel to the axial direction of the outer connector 21; the connecting strip 14 at the bottom of the outer connector 21 is provided with a support rail 211 extending along the axial direction; the support arm 32 is connected to the support rail 211.

[0073] The first end 121 and the second end 122 are both movable ends of the occipital region 12, and are provided with matching elongated slots, the long sides of which are serrated. The adjustment part 123 engages with the serrations of the elongated slots of the first end 121 and the second end 122 via gears, adjusting the relative movement of the first end 121 and the second end 122 along their length extension direction, thereby tightening or loosening the occipital region 12. The adjustment part 123 is always located in the middle position of the occipital region 12, corresponding to the wearer's occipital bone. The structure of the adjustment part 123 is prior art and will not be described in detail in this utility model.

[0074] Support frame 3 is used to support the external connector 21 of duct 2. For example... Figure 4 and Figure 5 As shown, the support leg 31 of the support frame 3 is mounted on the adjustment part 123, and the support arm 32 extends forward and upward above the support leg 31 at an angle. The angle of inclination of the support arm 32 can be set according to the inclination direction of the outer connector 21. Preferably, the support arm 32 is configured as a column or a plate. Correspondingly, as... Figure 8As shown, the connecting strip 14 at the bottom of the outer connector 21 is provided with a support rail 211. The support rail 211 is configured with a cross-section that matches the support arm 32, such as a cylindrical or plate-shaped tube. According to another embodiment of the present invention, the shapes of the support arm 32 and the support rail 211 can be interchanged. For example, the support arm 32 can be configured as a tube, and the support rail 211 can be configured as a cylindrical or plate-shaped tube to match the tube shape. Besides... Figure 8 The support rail 211 shown is disposed outside the lower surface of the connecting belt 14, and the support rail 211 can also be disposed directly at the bottom of the outer connector 21.

[0075] By matching the support arm 32 and the support rail 211, the support arm 32 and the support rail 211 are slidably connected, so that the support arm 32 and the support rail 211 can slide relative to each other along the axial direction of the outer connector 21. When the length of the back of the head 12 is adjusted due to the different head circumference of the wearer, the support frame 3 moves along the front and back direction with the adjustment part 123, and the support arm 32 can still maintain its fit with the support rail 211, thereby supporting the outer connector 21.

[0076] like Figure 6 As shown, the support leg 31 and support arm 32 bend backward to form a shock-absorbing bend, extending the length of the support arm 32. When the wearer's head circumference is small, the support frame 3 may move forward with the adjustment part 123, potentially exceeding the position of the outer connector 21. Because the support leg 31 and support arm 32 bend backward, extending the length of the support arm 32, the support rail 211 can slide backward along the support arm 32 with a larger displacement, thus avoiding interference from the displacement of the adjustment part 123 with the outer connector 21.

[0077] In addition, due to the damping bend, the outer joint 21 can undergo slight deformation to form a buffer when it is subjected to external force.

[0078] Preferably, the surface of the support frame 3 is partially or entirely provided with reinforcing ribs, which can enhance the mechanical strength of the support frame 3.

[0079] A limiting element 321 is provided at the end of the support arm 32 to constrain the sliding displacement of the support arm 32 on the support rail. By setting the limiting element, the maximum displacement of the external connector is limited to prevent the external connector from falling off.

[0080] like Figure 5 As shown, the connecting strap 14 includes a fifth end 141 at the top of the connector 13 and a sixth end 142 at the outer connector 21.

[0081] The connecting strap 14 applies an upward pulling force to the outer connector 21, fixing the distance between the outer connector 21 and the wearer's head. The connecting strap 14 is made of a flexible material such as plastic, allowing it to adhere to the back of the wearer's head. As the curvature of the back of the head varies from wearer to wearer, the orientation of the outer connector 21 is essentially controlled. Preferably, the length of the connecting strap 14 is adjustable, allowing it to be adjusted according to the contour of the back of the head of different wearers.

[0082] like Figure 7 and Figure 10 As shown, the headband 1 also includes a binding strap 18, with its two ends connected to the connecting strap 14 and the external connector 21 respectively. The binding strap 18 wraps around the starting end of the left pipe 22 and / or the starting end of the right pipe 23, binding the starting ends of the left pipe 22 and / or the right pipe 23 to the external connector 21. By setting the connecting strap, the stability of the duct can be further improved. By setting the binding strap, the duct and the external connector can be tightly connected, further improving the stability of the duct.

[0083] like Figure 5 As shown, the two ends of the top of the head 13 are connected to the left joint 15 and the right joint, respectively; the top of the head 13 has a third end 131 and a fourth end 132 between the left joint 15 and the right joint; the third end 131 is provided with a plurality of holes arranged along the length direction; the fourth end 132 is provided with at least one pin arranged along the length direction; the length of the top of the head 13 can be selectively adjusted by adjusting the relative movement of the third end 131 and the fourth end 132 through the cooperation of the pin and the holes.

[0084] The third end 131 and the fourth end 132 are the free ends of the top of the head 13. They are connected by a pin. The pin can be inserted into different holes to freely adjust the tightening or loosening of the third end 131 and the fourth end 132 along their extension direction, thereby adjusting the length of the top of the head 13 to fit the contour of different wearers' heads.

[0085] Preferably, the third end 131 is provided with a collar at the end; the fourth end 132 passes through the collar. The collar allows the third end 131 and the fourth end 132 to fit together.

[0086] like Figure 5 As shown, the third end 131 also includes a bulge disposed between the hole and the collar, facing away from the fourth end 132; the fifth end 141 is connected to the bulge. When the position between the hole and the collar corresponds to the center of the wearer's head, the fifth end 141 of the connecting strap 14 is connected to this position, which can ensure that the connecting strap 14 is located at the center of the top of the head 13.

[0087] Preferably, the fifth end 141 is provided with a sleeve hole parallel to the extension direction of the third end 131, and a positioning post is provided on the inner wall of the sleeve hole; the protrusion is provided with at least one positioning hole that matches the positioning post; the third end 131 passes through the sleeve hole, so that the protrusion is located in the sleeve hole, and the positioning post is inserted into the positioning hole to adjust the position of the fifth end 141.

[0088] By cooperating with the positioning post and different positioning holes, the connection position of the fifth end 141 of the connecting band 14 can be finely adjusted, so that when adjusting the length of the top of the head 13, the connection position of the fifth end 141 is adjusted accordingly, so that the connection position of the fifth end 141 is kept basically in the center of the top band.

[0089] like Figure 8 As shown, duct 2 is equipped with at least two ventilation openings facing different directions. When multiple ventilation openings are provided, some ventilation openings can be closed with Velcro, thereby adjusting the number and orientation of ventilation openings under different operating conditions.

[0090] Figure 9 A schematic diagram of another air supply structure is shown.

[0091] like Figure 9 As shown, the ends of the left pipe 22 and the right pipe 23 maintain a distance from each other; the end of the left pipe 22 is provided with a left ventilation opening; the end of the right pipe 23 is provided with a right ventilation opening. In this utility model, the lengths of the left pipe 22 and the right pipe 23 can be set as needed, or only the left pipe 22 or the right pipe 23 may be included. The orientation of the ventilation openings can be arbitrarily set according to ventilation needs.

[0092] Figure 10 An exploded view of the duct is shown.

[0093] like Figure 10 As shown, the left duct 22 and / or the right duct 23 include a perforated tubular frame 202 and a fabric outer skin 201; the tubular frame 202 is made of any material including plastic, metal, and carbon fiber, such as a spring. The perforated tubular frame 202 and the fabric outer skin 201 significantly reduce the weight of the duct 2. According to one embodiment of the present invention, the inner surface of the fabric outer skin 201 is provided with an airtight coating to provide sealing.

[0094] Preferably, the left pipe 22 and / or the right pipe 23 are flexible pipes, capable of bending at a certain angle perpendicular to their extension direction, facilitating a tight fit with the head strap 1. Furthermore, when the external connector 21 is subjected to external force, the duct 2 can provide a certain degree of deformation for cushioning. The flexible pipe includes a corrugated pipe or an integrally molded flexible hose with an equivalent structure.

[0095] like Figure 10As shown, the vent is equipped with an airflow adjustment component; the airflow adjustment component includes a support frame 2021; a rotatable inner shell 2022 with an inlet and an outlet is provided inside the support frame 2021, and there is at least one rotation angle such that when the inner shell 2022 rotates, the inlet is connected to the vent, and the outlet partially overlaps with the vent.

[0096] The support frame 2021 is fixed on the tubular skeleton 202 of the air duct 2. When the inner shell 2022 rotates along its rotation axis, it changes the airflow direction in the first direction. When the rotation angle of the inner shell 2022 is large, the outlet and the ventilation opening partially overlap, which can adjust the airflow size.

[0097] like Figure 10 As shown, a rotatable paddle 2023 is provided inside the inner shell 2022, and there is at least one rotation angle that changes the wind direction of the outlet of the inner shell 2022 when the paddle 2023 rotates; the inner shell 2022 is provided with multiple teeth; the paddle 2023 is provided with claws that match the teeth; the claws are mounted on the teeth, so that the paddle 2023 is limited by the cooperation of the claws and teeth when it rotates.

[0098] When the paddle 2023 rotates, it changes the direction of airflow in the second direction. Through the engagement of the teeth and claws, the paddle 2023 can be fixed at different rotation angles. Preferably, the rotation direction of the paddle 2023 is not parallel to the rotation direction of the inner shell 2022, so that the first direction and the second direction do not coincide, allowing the airflow direction to be changed in multiple directions.

[0099] The air delivery mechanism provided by this utility model features an air duct that passes through a clearance groove and is tightly fixed to the forehead area of ​​the headband. This maintains the stability of the air duct and prevents interference between the air duct and other components. By making at least the portion of the air duct corresponding to the back of the head flexible, the orientation of the outer connector can be adjusted as needed. The stability of the air duct is improved by providing a support frame to support the outer connector. The support arm of the support frame, in conjunction with the support rail, allows for a certain adjustment range even when the outer connector is supported, accommodating different wearers. The connecting strap further enhances the stability of the air duct. The restraint strap ensures a tight connection between the air duct and the outer connector, further improving the stability of the air duct. The limiting component restricts the maximum displacement of the outer connector, preventing it from detaching.

[0100] While various embodiments of the present invention have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will occur to those skilled in the art without departing from the spirit and intent of the present invention. It should be understood that various alternatives to the embodiments of the present invention described herein may be employed in the practice of the present invention. The appended claims are intended to define the scope of protection of the present invention and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. An air supply mechanism, characterized in that, include: A headband (1) and a duct (2) with an external connector (21). The headband (1) is provided with a left relief groove (100) located on the left side of the wearer. The air duct (2) includes a left pipe (22) whose starting end is connected to the external connector (21). The left pipe (22) passes through the left relief groove (100) and is fixedly connected to the headband (1) in the forehead area of ​​the wearer. The left pipe (22) is provided with a ventilation opening. And / or, The headband (1) is provided with a right relief groove (200) located on the right side of the wearer. The air duct (2) includes a right pipe (23) whose starting end is connected to the external connector (21). The right pipe (23) passes through the right relief groove (200) and is fixedly connected to the headband (1) in the forehead area of ​​the wearer. The right pipe (23) is provided with a ventilation opening.

2. The air supply mechanism according to claim 1, characterized in that, include: The headband (1) includes a forehead portion (11) surrounding the wearer's forehead region, a back occipital portion (12) surrounding the wearer's occipital region, and a top occipital portion (13) surrounding the wearer's top occipital region. The forehead portion (11) and the back occipital portion (12) are joined on the left side of the wearer's head to form a left joint portion (15), and joined on the right side of the wearer's head to form a right joint portion. The outer surface of the left joint (15) is provided with a left connecting part (16), and a left relief groove (100) is formed between the left joint (15) and the left connecting part (16). The left pipe (22) passes through the left relief groove (100) and extends along the forehead (11) to be fixedly connected to the forehead (11). And / or, The outer surface of the right joint is provided with a right connecting part, and a right relief groove (200) is formed between the right joint and the right connecting part. The right pipe (23) passes through the right relief groove (200) and extends along the forehead (11) and is fixedly connected to the forehead (11).

3. The air supply mechanism according to claim 1 or 2, characterized in that, The portion of the air duct (2) corresponding to the occipital region (12) is a flexible duct.

4. The air supply mechanism according to claim 1 or 2, characterized in that, The end of the left pipe (22) is spaced apart from the end of the right pipe (23), and the left pipe (22) and the right pipe (23) are respectively provided with ventilation openings corresponding to the forehead area of ​​the wearer; Alternatively, the end of the left pipe (22) is connected to the end of the right pipe (23), and the left pipe (22) and the right pipe (23) are provided with at least one ventilation opening corresponding to the forehead area of ​​the wearer.

5. The air supply mechanism according to claim 1 or 2, characterized in that, The left conduit (22) and / or the right conduit (23) include a tubular skeleton (202) and an outer skin (201).

6. The air supply mechanism according to claim 5, characterized in that, The tubular skeleton (202) is made of any one of plastic, metal, or carbon fiber; The outer skin (201) is made of any one of the following materials: cloth, metal foil, polyvinyl chloride, polypropylene, and polyester.

7. The air supply mechanism according to claim 1 or 2, characterized in that, The left conduit (22) and / or the right conduit (23) are flexible conduits.

8. The air supply mechanism according to claim 2, characterized in that, The headband (1) also includes a connecting strap (14); The two ends of the connecting strap (14) are respectively connected to the top of the head (13) and the outer connector (21).

9. The air supply mechanism according to claim 8, characterized in that, The headband (1) also includes a restraint strap (18) with its two ends respectively connected to the connecting strap (14) and the outer connector (21). The binding strap (18) surrounds the starting end of the left pipe (22) and / or the starting end of the right pipe (23), binding the starting end of the left pipe (22) and / or the starting end of the right pipe (23) to the external connector (21).

10. The air supply mechanism according to claim 2, characterized in that, A support frame (3) is provided between the back of the head (12) and the external connector (21). The support frame (3) includes a support leg (31) mounted on the back of the head (12) and a support arm (32) that is substantially parallel to the axial direction of the outer connector (21). The support arm (32) is slidably connected to the support rail (211) provided on the outer connector (21).

11. The air supply mechanism according to claim 10, characterized in that, The occipital portion (12) has a first end (121), a second end (122), and an adjustment portion (123) between the left joint portion (15) and the right joint portion; The adjustment unit (123) selectively adjusts the length of the occipital region (12) by adjusting the relative movement of the first end (121) and the second end (122); The support leg (31) is mounted on the adjustment part (123).

12. The air supply mechanism according to claim 10, characterized in that, The end of the support arm (32) is provided with a limiting member (321). The limiting member (321) restricts the sliding displacement of the support arm (32) on the support rail (211).

13. The air supply mechanism according to claim 1, characterized in that, The ventilation opening is equipped with an airflow adjustment component; The wind direction adjustment component includes a support frame (2021); The support frame (2021) is provided with a rotatable inner shell (2022) with an inlet and an outlet. There is at least one rotation angle such that when the inner shell (2022) rotates, the inlet is connected to the vent, and the outlet partially overlaps with the vent.

14. The air supply mechanism according to claim 13, characterized in that, The inner shell (2022) is provided with a rotatable lever (2023), and there is at least one rotation angle that changes the wind direction of the outlet of the inner shell (2022) when the lever (2023) rotates; The inner shell (2022) is provided with multiple teeth; The paddle (2023) is provided with a claw that matches the teeth; The claw of the paddle (2023) is mounted on the teeth of the inner shell (2022), so that the paddle (2023) is limited by the cooperation of the claw and the teeth when it rotates.

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