Leg support ventilation mechanism

Abstract

The utility model provides a leg support ventilation mechanism, and relates to the technical field of automotive interiors, the leg support ventilation mechanism comprises a fan, a first conveying mechanism and a second conveying mechanism; the fan provides an air source, and the fan is provided with at least one first air opening and at least one second air opening; the first conveying mechanism is used for communicating the first air opening with the main seat area seat surface; and the second conveying mechanism is used for communicating the second air port with the surface of the leg support. And the same air source is utilized to guarantee simultaneous ventilation of the main seat area and the leg support area. The technical problems that a leg support of an existing ventilation seat is not ventilated, and a leg support area is poor in comfort compared with a main seat area are solved.

Description

Technical Field

[0001] The present application relates to the field of automobile interior decoration, and in particular to a leg rest ventilation mechanism. Background Art

[0002] When a passenger sits on a seat, the back of the body is in close contact with the seat surface. The air in the contact area is not ventilated, which is not conducive to the elimination of sweat and makes the body feel uncomfortable. The ventilation function effectively improves the air circulation environment of the contact area between the body and the seat surface. Even if you sit for a long time, the contact area between the body and the seat will be dry and comfortable.

[0003] Conventional ventilated seats have ventilation bags that do not extend to the leg rest area, and thus cannot provide ventilation for the leg rest. When summer arrives, the seat ventilation function is turned on, and air flows through the main seat area (seat surface and backrest), creating a sense of wind, which takes away the sweat from the contact area between the human body and the seat surface, creating a cool and dry feeling of comfort; in contrast, the contact area between the legs and the leg rest will create a distinct feeling of heat and sweat. This application proposes a leg rest ventilation structure for such a seat. Utility Model Content

[0004] The purpose of the present application is to provide a leg rest ventilation mechanism to address the above problems, so as to ensure that the leg rest area and the main seat area can be ventilated at the same time, thereby improving the comfort of the passengers.

[0005] The leg support ventilation mechanism provided in the present application comprises: a fan, a first conveying mechanism and a second conveying mechanism;

[0006] The fan provides a wind source, and the fan has at least one first air outlet and at least one second air outlet;

[0007] The first conveying mechanism is used to connect the first air outlet and the main seat area seat surface; the second conveying mechanism is used to connect the second air outlet and the leg rest surface.

[0008] According to the technical solution provided in the embodiment of the present application, the first air outlet is the air inlet of the fan, and the second air outlet is the air outlet of the fan.

[0009] According to the technical solution provided in the embodiment of the present application, the second conveying mechanism includes:

[0010] The second air guide mechanism is arranged at the leg rest and is used to evenly transmit the received airflow to the surface of the leg rest;

[0011] at least one connecting pipeline, two ends of which are respectively connected to the second air guide mechanism and the second air outlet;

[0012] The connecting pipeline has a redundant length, or the connecting pipeline has a first telescopic section, which is used to at least ensure that the air duct between the second air guiding mechanism and the blower remains connected during the position adjustment process of the leg rest.

[0013] According to the technical solution provided by the embodiment of the present application, the first telescopic section includes a corrugated structure.

[0014] According to the technical solution provided by the embodiment of the present application, the first telescopic section of the connecting pipeline includes a first sleeve and a second sleeve;

[0015] The first sleeve and the second sleeve are sleeved with each other and can slide relative to each other in the length direction.

[0016] According to the technical solution provided by the embodiment of the present application, the connecting pipeline includes a first connecting pipe and a second connecting pipe detachably connected thereto, and the two are connected to each other and communicate with each other;

[0017] The first connecting pipe communicates with the blower;

[0018] One end of the second connecting pipe is connected to the first connecting pipe, and the other end is connected to the second air guiding mechanism.

[0019] According to the technical solution provided by the embodiment of the present application, the second connecting pipe is made of a flexible hose; or,

[0020] The second air guiding mechanism includes a second ventilation bag, and the second connecting pipe is integrally connected to the second ventilation bag.

[0021] According to the technical solution provided by the embodiment of the present application,

[0022] The second connecting pipe has a second telescopic section; or,

[0023] The second connecting pipe has a redundant length;

[0024] To ensure that the air duct of the second conveying mechanism remains connected when the leg rest is adjusted in angle.

[0025] According to the technical solution provided by the embodiment of the present application, the blower has at least two second air outlets, and the connecting pipeline is correspondingly arranged with the second air outlets, which is used to divide the inhaled or blown air flow provided by the blower into multiple parts and convey them to multiple positions of the leg rest respectively.

[0026] According to the technical solution provided by the embodiment of the present application, a cooler is further included;

[0027] The cooler is arranged at the air outlet; or,

[0028] The cooler is arranged in the second conveying mechanism.

[0029] Advantages of the present application compared with the prior art:

[0030] The leg rest ventilation mechanism provided by the present application includes a blower, a first conveying mechanism, and a second conveying mechanism; the blower provides a wind source, and one of the first air outlet and the second air outlet is the air outlet of the blower, and the other is the air inlet of the blower; the first conveying mechanism is communicated with the air inlet of the blower to provide the inhaled air flow to the main seat; the second conveying mechanism is communicated with the air outlet to provide the blown air flow to the leg rest; or, the first conveying mechanism is communicated with the air outlet of the blower to provide the blown air flow to the main seat; the second conveying mechanism is communicated with the air inlet to provide the inhaled air flow to the leg rest.

[0031] The technical solution provided by the present application makes full use of the blown air flow generated by the air outlet of a blower and the inhaled air flow generated by the air inlet of the blower, transmits the blown air flow to the main seat area, and conveys the inhaled air flow to the leg rest area; or, transmits the blown air flow to the leg rest area and conveys the inhaled air flow to the main seat area. It ensures that the main seat area and the leg rest area can maintain a ventilation state at the same time, without the need to add an additional wind source, which is economical and environmentally friendly, effectively solves the technical problem of no ventilation in the leg rest area in the prior art, and significantly improves the riding comfort of customers.

[0032] It should be understood that the description of technical features, technical solutions, beneficial effects or similar languages in the present application does not imply that all features and advantages can be achieved in any single embodiment. On the contrary, it can be understood that the description of features or beneficial effects means that at least one embodiment includes specific technical features, technical solutions or beneficial effects. Therefore, the description of technical features, technical solutions or beneficial effects in this specification does not necessarily refer to the same embodiment. Furthermore, the technical features, technical solutions and beneficial effects described in this embodiment can be combined in any appropriate manner. Those skilled in the art will understand that an embodiment can be implemented without one or more specific technical features, technical solutions or beneficial effects of a specific embodiment. In other embodiments, additional technical features and beneficial effects can also be identified in specific embodiments that do not embody all embodiments. Description of the Drawings

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0034] Figure 1 An exploded view of a leg rest ventilation mechanism provided for an embodiment of the present application;

[0035] Figure 2 Schematic diagram of a leg rest ventilation mechanism provided by an embodiment of the present application in the extended state of the leg rest;

[0036] Figure 3 Schematic diagram of a leg rest ventilation mechanism provided by an embodiment of the present application in the retracted state of the leg rest;

[0037] Figure 4 Schematic diagram of an adjustable-angle leg rest provided by an embodiment of the present application;

[0038] Figure 5 Schematic diagram of a second conveying mechanism in the retracted state provided by an embodiment of the present application;

[0039] Figure 6 is Figure 5 Local enlarged schematic diagram of part A in

[0040] Figure 7 Schematic diagram of a second conveying mechanism in the stretched state provided by an embodiment of the present application;

[0041] Figure 8 Schematic diagram of a second air guiding mechanism and the connecting pipeline at its interface provided by an embodiment of the present application;

[0042] Figure 9 Schematic diagram of a second ventilation bag provided by an embodiment of the present application.

[0043] The text markings in the figure are indicated as:

[0044] 1. Fan; 2. First conveying mechanism; 21. First ventilation bag; 22. First foam body; 3. Second conveying mechanism; 31. Second ventilation bag; 32. Second foam body; 33. Corrugated structure; 34. First sleeve; 35. Second sleeve; 36. Sealing ring; 37. First connecting pipe; 38. Second connecting pipe; 39. Support structure; 4. Main seat bracket; 5. Leg rest bracket; 61. Air pump; 62. First airbag; 63. First elastic member; 71. Tipping support body; 72. Rotating shaft; 73. Second airbag; 74. Second elastic member. Detailed implementation manners

[0045] To enable those skilled in the art to better understand the technical solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory, and should not have any restrictive effect on the protection scope of the present application. Specifically, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present invention.

[0046] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily limit to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0047] As Figures 1-3 shown, this embodiment provides a leg rest ventilation mechanism including a fan 1, a first conveying mechanism 2 and a second conveying mechanism 3; the fan 1 provides a wind source, and the fan 1 has an air inlet and an air outlet; the first conveying mechanism 2 is communicated with the air inlet of the fan 1 to provide the inhaled air flow to the main seat; the second conveying mechanism 3 is communicated with the air outlet to provide the blown air flow to the leg rest; or, the first conveying mechanism 2 is communicated with the air outlet of the fan 1 to provide the blown air flow to the main seat; the second conveying mechanism 3 is communicated with the air inlet to provide the inhaled air flow to the leg rest.

[0048] The technical solution provided by the present application makes full use of the blown air flow generated at the air outlet of a fan 1 and the inhaled air flow generated at the air inlet of the fan 1, transmits the blown air flow to the main seat area, and conveys the inhaled air flow to the leg rest area; or, transmits the blown air flow to the leg rest area and conveys the inhaled air flow to the main seat area. It ensures that the main seat area and the leg rest area can maintain a ventilation state at the same time, and there is no need to add an additional air source, which is economical and environmentally friendly, and effectively solves the technical problem of no ventilation in the leg rest area in the prior art, and significantly improves the riding comfort of customers.

[0049] In a preferred embodiment, the distance between the leg rest and the main seat is adjustable, the leg rest can move relative to the main seat, and the leg rest ventilation mechanism includes:

[0050] A fan 1;

[0051] The first conveying mechanism 2 includes a duct, a first air guide mechanism and a first foam body 22; the first air guide mechanism can be a first ventilation bag 21, which can be arranged on the side of the first foam body 22 away from the human body. At this time, the duct connects the air inlet of the fan 1 with the first ventilation bag 21. The first ventilation bag 21 is densely provided with multiple ventilation holes, and the ventilation holes on the first ventilation bag 21 correspond to the ventilation holes on the first foam body 22. The airflow inhaled from the surface of the main seat is conducted through the ventilation holes on the first foam body 22 and the ventilation holes on the first ventilation bag 21, and then enters the fan 1 through the duct. The first ventilation bag 21 can be arranged on the side of the first foam body 22 close to the human body. At this time, a breathable seat mask is arranged on the side of the first ventilation bag 21 close to the human body. The duct penetrates the first foam body 22 to connect the first ventilation bag 21 with the air inlet of the fan 1; the airflow inhaled from the surface of the main seat is conducted through the seat mask and the ventilation holes on the first ventilation bag 21, and then enters the fan 1 through the duct.

[0052] The leg rest telescopic mechanism includes a main seat support 4, a leg rest support 5, an air pump 61, a catheter, a first air bag 62 and an elastic member; the leg rest support 5 is slidably connected to the main seat support 4 and is provided with a guiding slide rail, the first air bag 62 is provided between the main seat support 4 and the leg rest support 5, and the expansion direction of the first air bag 62 is the same as the sliding direction of the leg rest. Under normal conditions, the first air bag 62 is in a contracted state, and the leg rest is also in a contracted state. The air pump 61 inflates the first air bag 62 through the catheter, and the first air bag 62 expands to push the leg rest out, and the leg rest is in an extended state, and at the same time, the first elastic member 63 is charged. When the leg rest needs to be retracted, the air pump 61 is stopped from inflating, the first air bag 62 is deflated, and the leg rest support 5 is reset under the elastic force of the first elastic member 63.

[0053] The second conveying mechanism 3 includes a duct, a second air guiding mechanism and a second foam body 32; the structure and function of the second air guiding mechanism and the second foam body 32 refer to the above-mentioned first conveying mechanism 2. It should be noted that the second conveying mechanism 3 is connected to the air outlet of the fan 1, and a uniform airflow is blown out to the surface of the leg rest. In addition, the duct of the second conveying mechanism 3 has an excess length, or a first telescopic section is provided on the duct, which is used to at least meet the requirement that the air path between the second air guiding mechanism and the fan 1 remains connected during the adjustment of the leg rest.

[0054] In addition, the first airbag 62 and the elastic member, which are the power sources for the translational movement of the leg rest bracket 5, can be replaced by other driving members, such as an electric screw, a hydraulic lever, etc., or can be moved manually by manpower. The design scheme provided in this application improves the air guide method and circuit, and can ensure that the leg rest surface and the main seat surface are ventilated at the same time during the translation process, and is suitable for telescopic leg rests driven by various methods.

[0055] like Figures 5-7As shown, in a preferred embodiment, during the telescopic movement of the leg rest, the second conveying mechanism 3 needs to keep the air passage between the blower 1 and the leg rest unobstructed. In addition to using the corrugated structure 33, other methods can also be adopted, such as increasing the extra length of the conduit between the blower 1 and the leg rest, or using other ventilation ducts with a first telescopic section. For example:

[0056] The first telescopic section of the connecting pipe between the blower 1 and the leg rest includes a first sleeve 34 and a second sleeve 35; the first sleeve 34 and the second sleeve 35 are sleeved with each other and can slide relative to each other in their length directions. A sealing ring 36 is also provided to ensure the sealing between the sleeves, which is arranged in the gap between the walls of the first sleeve 34 and the second sleeve 35; the sealing ring 36 is fixedly and tightly connected to the first sleeve 34 and abuts against the second sleeve 35. The overlapping length of the sleeved section of the first sleeve 34 and the second sleeve 35 is greater than the maximum translation distance of the leg rest. During installation, adjust the relative sliding direction of the two sleeves (the length direction of the sleeved area) to be parallel to the translation direction of the leg rest. The first sleeve 34 is fixedly connected to the blower 1 and is relatively fixed with respect to the main seat bracket 4, and the second sleeve 35 is fixedly connected to the second ventilation bag 31 and is relatively fixed with respect to the leg rest bracket 5. During the telescopic movement of the leg rest, the first sleeve 34 and the second sleeve 35 are pulled to slide relative to each other, and during the sliding process, the first sleeve 34 and the second sleeve always ensure being sleeved, that is, keeping the air passage unobstructed. Or,

[0057] The first telescopic section includes a corrugated structure 33. When the leg rest extends, the corrugated structure 33 is stretched to protect the conduit from being broken; when the leg rest retracts, the corrugated structure 33 contracts to prevent the conduit from piling up and knotting to ensure the air passage of the conduit. Among them, the corrugated structure 33 is a ventilation pipe with corrugated folds on the wall, which has both telescopic property and ventilation property, and specifically, a corrugated pipe can be used.

[0058] In a preferred embodiment, the ventilation bag and the foam can be replaced by other air guiding devices, as long as the air flow can be evenly conducted to the seat surface. For example, grooves are opened in the foam, or a three-dimensional knitted mesh is arranged in the groove. In addition, different types of air guiding devices can be adopted for the leg rest and the main seat.

[0059] Such as Figure 8 、 9As shown, in a preferred embodiment, when the second air guide mechanism and the leg rest are spaced apart (with a support buffer provided therebetween), the connecting pipeline includes a first connecting pipe 37 and a second connecting pipe 38 detachably connected thereto. When the two are connected, they are in communication with each other; the first connecting pipe 37 is connected to the blower 1; the second connecting pipe 38 is arranged at the leg rest, is in communication with the second ventilation bag 31 and is relatively fixed to the leg rest bracket 5. The leg rest bracket 5 is provided with a through groove or through hole for receiving the first connecting pipe 37. After the first connecting pipe 37 passes through the through groove or through hole, it is connected to the second connecting pipe 38. Or, the leg rest bracket 5 is provided with a sealed through hole. The first connecting pipe 37 is in communication with the lower end opening of the sealed through hole, and the second connecting pipe 38 is in communication with the upper end opening of the sealed through hole. The end of the second connecting pipe 38 far from the first connecting pipe 37 is connected to the ventilation bag.

[0060] In a preferred embodiment, the leg rest bracket 5 and the main seat bracket 4 are provided with grooves for accommodating the catheter. When the position is adjusted, it provides sufficient space for the catheter to move, and at the same time can limit the movement path of the catheter, further improving the stability of the pipeline.

[0061] As Figure 4 As shown, in a preferred embodiment, the leg rest has an angle adjustment function, and its angle adjustment structure includes: a flipping support body 71, an air pump 61, a second airbag 73, a catheter and a second elastic member 74; the flipping support body 71 is hinged to the leg rest bracket 5, and the second airbag 73 is arranged between the flipping support body 71 and the leg rest bracket 5. In the normal state, the flipping support body 71 is in a horizontal state. The air pump 61 inflates the second airbag 73, and the flipping support body 71 gradually flips upward. By controlling the degree of inflation of the airbag, the flipping angle of the flipping support body 71 is adjusted. The second elastic body is away from the rotation axis of the flipping support body 71, and both ends of the second elastic body are respectively connected to the flipping support body 71 and the leg rest bracket 5. During the process of increasing the flipping angle of the flipping support body 71, the second elastic body is gradually energized; when it is necessary to reduce the flipping angle of the leg rest, the inflation of the second airbag 73 by the air pump 61 is reduced, the second airbag 73 expands and contracts, and the flipping support body 71 flips downward under the elastic force of the second elastic member 74.

[0062] In a preferred embodiment, the power source of the flipping support body 71, the second airbag 73, can be replaced by other driving members, such as an electric lead screw, a hydraulic rod, etc. The body end is rotatably connected to the leg rest bracket 5, and the telescopic ejecting end is slidably connected to the flipping support body 71; or, a motor is used in cooperation with a transmission connection to directly drive the rotation axis of the flipping support body 71; or, it is manually moved in a manual form. For the structure of the air supply part, please refer to the above embodiments, and it will not be elaborated here one by one.

[0063] In a preferred embodiment, the second conveying mechanism 3 includes a second connecting pipe 38 which connects the second ventilation bag 31 with the blower 1, wherein the second ventilation bag 31 is fixedly arranged relative to the flipping support 71. The second connecting pipe 38 at least passes through the rotating shaft 72 where the leg rest angle changes; or, the second connecting pipe 38 has a second telescopic section, such as a corrugated structure 33; or, the second connecting pipe 38 has an extra length; to ensure that when the leg rest is adjusted in angle, the air path of the second conveying mechanism 3 remains connected. Or,

[0064] The pipeline extension path of the second connecting pipe 38 passes through the rotating shaft 72. At this time, the second connecting pipe 38 can be integrally connected to the second ventilation bag 31; the second connecting pipe 38 can be a flexible pipe. Preferably, a support structure 39 is arranged inside the second connecting pipe 38. The support structure 39 extends along the diameter of the second connecting pipe 38 to support the pipeline path of the second connecting pipe 38 to remain unobstructed, avoiding the interruption of the ventilation air path when the second connecting pipe 38 is pressed by the passengers. Optionally, the support structure 39 can be a chain guide, a universal pipe, a corrugated pipe or other auxiliary support structures.

[0065] In a preferred embodiment, the blower has at least two second air outlets, and the connecting pipelines are arranged corresponding to the second air outlets, for dividing the inhaled or blown air flow provided by the blower 1 into multiple portions and respectively conveying them to multiple positions of the leg rest. Optionally but not limited to, the leg rest is of a left-right separated type, and the second conveying mechanism 3 has a branched air path for dividing the inhaled or blown air flow provided by the blower 1 into two portions and respectively conveying them to the left and right leg rests. Among them, there is only one air inlet and one air outlet for the blower 1. At the interface with the blower 1, the connecting pipeline is provided with a branched air path for dividing the air flowing out of the blower 1 into two portions and respectively conveying them to the left and right leg rests. When the blower 1 itself has two air outlets / air inlets, two identical connecting pipelines can be used to ventilate the left and right leg rest parts.

[0066] In a preferred embodiment, the leg rest ventilation mechanism further includes a cooler; the cooler is arranged at the air outlet of the blower 1; or, the cooler is arranged in the first conveying mechanism 2 or the second conveying mechanism 3 communicated with the air outlet of the blower 1.

[0067] When the seat ventilation is just turned on, it is disadvantageous that the inhaled air is at a relatively high temperature and is blown to another area. We can connect a thermoelectric cooler in the air outlet or the pipeline connected to the air outlet to cool the air by using a semiconductor, so as to blow the air with a lower temperature to the legs or the buttocks. When the cooler is installed in the air inlet pipeline or the air inlet of the blower 1, there will be a temperature loss when passing through the blower 1, reducing the cooling efficiency. After the temperature drops or after running for a period of time, the thermoelectric cooler can be controlled to turn off to reduce the energy consumption.

[0068] For the convenience of those skilled in the art to understand, the working principle of the leg rest ventilation mechanism provided in this application is as follows:

[0069] Existing ventilation seats only ventilate the main seat area. However, since the air outlet of the blower 1 must have an air inlet and an air outlet, the technical solution provided in this application makes full use of the air inlet and air outlet of the blower 1, transmits one of the air inlet and air outlet to the main seat area, and conveys the other to the leg rest area. After the blower 1 starts working, it ventilates the main seat area and the leg rest area simultaneously, improving the comfort of the passengers.

[0070] In this article, specific examples are used to elaborate on the principle and implementation manner of this application. The description of the above embodiments is only used to help understand the method and its core idea of this application. The above is only the preferred implementation manner of this application. It should be noted that due to the limited nature of written expression, and objectively there are infinite specific structures. For those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements, refinements or changes can be made, or the above technical features can be combined in an appropriate manner; these improvements, refinements, changes or combinations, or directly applying the concept and technical solution of the invention to other occasions without improvement, shall all be regarded as the protection scope of this application.

Claims

1. A leg support ventilation mechanism, characterized in that: include: A fan (1), a first conveying mechanism (2) and a second conveying mechanism (3); The fan (1) provides a wind source, and the fan (1) has at least one first air outlet and at least one second air outlet; The first conveying mechanism (2) is used to connect the first air outlet and the main seat area seat surface; the second conveying mechanism (3) is used to connect the second air outlet and the leg rest surface.

2. The leg support ventilation mechanism according to claim 1, characterized in that: The first air outlet is an air inlet of the fan (1), and the second air outlet is an air outlet of the fan (1).

3. The leg support ventilation mechanism according to claim 1, characterized in that: The second conveying mechanism (3) comprises: The second air guide mechanism is arranged at the leg rest and is used to evenly transmit the received airflow to the surface of the leg rest; at least one connecting pipeline, two ends of which are respectively connected to the second air guide mechanism and the second air outlet; The connecting pipeline has a surplus length, or the connecting pipeline has a first telescopic section, which is used to at least ensure that the air path between the second air guide mechanism and the fan (1) remains connected during the adjustment of the leg rest.

4. The leg support ventilation mechanism according to claim 3, characterized in that: The first telescopic section comprises a corrugated structure (33).

5. The leg support ventilation mechanism according to claim 3, characterized in that: The first telescopic section of the connecting pipeline comprises a first sleeve (34) and a second sleeve (35); The first sleeve (34) and the second sleeve (35) are sleeved with each other and can slide relative to each other in their length direction.

6. The leg support ventilation mechanism according to claim 3, characterized in that: The connecting pipeline comprises a first connecting pipe (37) and a second connecting pipe (38) detachably connected thereto, the two connecting pipes being interconnected when connected; The first connecting pipe (37) is in communication with the fan (1); One end of the second connecting pipe (38) is connected to the first connecting pipe (37), and the other end is communicated with the second air guide mechanism.

7. The leg support ventilation mechanism according to claim 6, characterized in that: The second connecting pipe (38) is a flexible hose; or The second air guiding mechanism comprises a second ventilation bag (31), and the second connecting pipe (38) is integrally connected to the second ventilation bag (31).

8. The leg support ventilation mechanism according to claim 6, characterized in that: The second connecting pipe (38) has a second telescopic section; or, The second connecting pipe (38) has a surplus length; It is used to ensure that the air path of the second conveying mechanism (3) remains connected when the angle of the leg rest is adjusted.

9. The leg support ventilation mechanism according to claim 3, characterized in that: The fan (1) has at least two of the second air outlets, and the connecting pipeline is arranged corresponding to the second air outlet, and is used to divide the inhaled airflow or the blown airflow provided by the fan (1) into multiple parts, and respectively transport them to multiple positions of the leg support.

10. The leg support ventilation mechanism according to claim 2, characterized in that: Also includes a refrigerator; The refrigerator is arranged at the air outlet; or, The refrigerator is arranged on the second conveying mechanism (3).

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