Telescopic transmission component and telescopic transmission system

Abstract

The utility model relates to the technical field of transmission devices, in particular to a telescopic transmission component and a telescopic transmission system. The telescopic transmission component comprises an air bag body and a telescopic shaft, and the air bag body is configured to be pneumatically switched between a contraction state and an extension state; the telescopic shaft is connected with the air bag body and can be driven by the air bag body to stretch out and draw back. The air bag body can be driven by the telescopic shaft to rotate around the axis. Through the quick response of the air bag body in the inflation and deflation states, the quick switching response of the telescopic transmission part in the stretching state and the contraction state can be achieved, and the problems that the mechanical transmission switching response efficiency is low and the buffering effect is poor are solved due to the buffering ejection support in the stretching state. The telescopic shaft can drive the air bag body to rotate around the axis, the telescopic shaft is mainly used in the torque transmission process, efficient rotation torque transmission can be achieved, continuous and regular rotation torque can be transmitted, and the problems that the torque transmission efficiency of a pure air bag body is low, and the air bag body is prone to distortion and even damage are solved.

Description

Technical Field

[0001] This utility model relates to the field of transmission device technology, and in particular to a telescopic transmission component and a telescopic transmission system. Background Technology

[0002] In massage systems, massage components such as massage heads and massage discs typically need to be moved and switched between a working position and a storage position. This allows them to be close to the human body and perform massage actions when in the working position, while being far away from the human body when in the storage position to avoid causing discomfort.

[0003] Massage components typically require telescopic transmission mechanisms to move between working and retracted positions. In mechanical massage systems, this is usually achieved through lead screws, telescopic arms, or swing arms that move the massage rollers between working and retracted positions. In pneumatic massage systems, the movement of the massage head or massage airbags between working and retracted positions is achieved by inflating or deflating the massage airbags or the support airbags.

[0004] However, considering comfort and safety, the response speed of telescopic transmission components such as lead screws, telescopic arms, and swing arms in mechanical massage systems is set to switch between the working ejection and retraction positions relatively slowly to avoid injury to the body from rapid ejection. This results in low switching efficiency, failing to meet massage needs promptly, and low cushioning during ejection massage. In contrast, pneumatic massage systems utilize air bags, which offer advantages such as excellent ejection flexibility, good cushioning, reduced discomfort, high safety, and a high stroke for rapid response. However, air bags have low rotational torque transmission efficiency and are prone to twisting, deformation, or even damage due to excessive surface friction. This makes it difficult to transmit continuous and regular rotational torque, hindering the realization of single-air-bag rotational massage. Utility Model Content

[0005] The present invention aims to provide a telescopic transmission component and a telescopic transmission system, which serve as a telescopic transmission and support mechanism for massage components in a massage system. This mechanism is designed to at least address the problems of low switching response efficiency and poor buffering effect in mechanical massage, as well as the problems of low torque transmission efficiency, easy twisting and deformation and damage of air bags, inability to transmit continuous and regular rotational torque, and difficulty in achieving single-air-bag rotational massage in pneumatic massage.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] In a first aspect, this utility model provides a telescopic transmission component, which includes an airbag and a telescopic shaft. The airbag is configured to pneumatically switch between a contracted state and an extended state. The telescopic shaft is engaged with the airbag and can be driven to extend and retract by the airbag. The airbag can be driven to rotate around an axis by the telescopic shaft.

[0008] In some embodiments, the telescopic transmission component further includes a first fixing plate, a first end of the airbag body is sealed to the first fixing plate, and a first end of the telescopic shaft is connected to the first fixing plate.

[0009] In some embodiments, the telescopic transmission member further includes a first pressing plate, and the first end of the airbag body is sealed and joined to the first fixing plate through the first pressing plate.

[0010] In some embodiments, the telescopic transmission component further includes a second fixing plate, the second end of the airbag body is sealed and engaged with the second fixing plate, and the second end of the telescopic shaft is connected to the second fixing plate.

[0011] In some embodiments, the telescopic transmission member further includes a second pressing plate, and the second end of the airbag body is sealed and joined to the second fixing plate through the second pressing plate.

[0012] In some embodiments, a transmission component is further included, wherein a first end of the transmission component is connected to the telescopic shaft, and a second end of the transmission component is used for transmission connection with a drive device.

[0013] In some embodiments, the transmission member has an air passage that is in fluid communication with the inflation space of the airbag.

[0014] In some embodiments, the telescopic shaft includes at least a first shaft segment and a second shaft segment, the first shaft segment and the second shaft segment being able to slide relative to each other in the axial direction, and the first shaft segment and the second shaft segment being able to transmit torque to each other in the circumferential direction, and the first end and the second end of the airbag body being engaged with the first shaft segment and the second shaft segment, respectively.

[0015] In some embodiments, the telescopic shaft has a support filling space; and the first shaft segment is provided with a vent hole for communicating the support filling space with the inflation space of the airbag body when the first shaft segment and the second shaft segment are extended relative to each other.

[0016] Secondly, this utility model provides a telescopic transmission system, which includes a pneumatic unit and the telescopic transmission component; the pneumatic unit is in fluid communication with the air bladder of the telescopic transmission component; the pneumatic unit supplies air to the air bladder or draws air from the air bladder to switch the air bladder between an extended state and a contracted state.

[0017] The telescopic transmission component of this utility model includes an airbag and a telescopic shaft. The airbag is attached to the telescopic shaft and can drive the shaft to extend and retract. The rapid response of the airbag in its inflation and deflation states enables the entire telescopic transmission component to quickly switch between extended and contracted states. In the extended state, it provides cushioning support, ensuring high safety during use and improving the problems of low switching response efficiency and poor cushioning effect in mechanical massage.

[0018] The telescopic shaft drives the airbag to rotate around its axis, achieving torque transmission. During torque transmission, the telescopic shaft is the primary driver, while the airbag plays a secondary role, resulting in highly efficient rotational torque transmission. This improves upon the problems of low torque transmission efficiency and the airbag's susceptibility to twisting, deformation, or even damage under torque. Furthermore, it can transmit continuous and regular rotational torque, achieving controllable and reliable torque transmission.

[0019] Furthermore, when the telescopic transmission component of this utility model embodiment is applied to a massage system, the telescopic transmission component, which includes a telescopic shaft and an airbag, can drive the massage component to extend and retract, and provide cushioned support when the massage component is working, ensuring the stability of the massage component when moving between the extended position and the retracted position, reducing shaking when performing massage actions, and driving the massage component to perform massage actions including rotation by transmitting torque.

[0020] The telescopic transmission system of this utility model embodiment includes a pneumatic unit and the aforementioned telescopic transmission component. The pneumatic unit can supply air to the airbag of the telescopic transmission component to extend the telescopic transmission component, thereby improving the extension response speed. Alternatively, the pneumatic unit can draw gas from the telescopic airbag to accelerate the deflation of the airbag and increase the degree of deflation, making the deflation of the airbag more complete and completing the deflation in a shorter time, thus ensuring the telescopic stroke of the telescopic transmission component.

[0021] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, specific embodiments of this utility model are given below. Attached Figure Description

[0022] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0023] Figure 1 This is a three-dimensional structural diagram of the telescopic transmission component according to an embodiment of the present utility model;

[0024] Figure 2 This is an exploded view of the telescopic transmission component according to a first perspective of an embodiment of the present utility model.

[0025] Figure 3 This is an exploded view of the telescopic transmission component according to a second perspective of an embodiment of the present utility model.

[0026] Figure 4 This is a cross-sectional structural schematic diagram of the telescopic transmission component according to an embodiment of the present utility model;

[0027] Figure 5 This is an exploded structural diagram of the telescopic shaft of the telescopic transmission component according to an embodiment of the present utility model.

[0028] Figure 6 A schematic diagram of a massage component mounted on a telescopic transmission component;

[0029] Figure 7 This is a structural schematic diagram of the pneumatic system portion of the telescopic transmission system according to an embodiment of this utility model.

[0030] The reference numerals in the detailed embodiments are as follows:

[0031] 100. Telescopic transmission components;

[0032] 1. Telescopic shaft; 11. First shaft section; 111. Vent hole; 112. Through hole; 113. First guide groove; 114. First limiting step;

[0033] 12. Second shaft segment; 121. First guide rib; 122. Second limiting step; 123. Second guide groove; 124. Third limiting step;

[0034] 13. Support and fill space;

[0035] 14. Third axis segment; 141. Second guide rib; 142. Fourth limiting step;

[0036] 2. Airbag body; 3. First fixing plate; 4. Second fixing plate; 5. First pressing plate; 6. Second pressing plate;

[0037] 7. Transmission components; 71. Air passage; 72. Connecting seat;

[0038] 8. Sealing plate; 9. Sealing ring;

[0039] 200. Massage component; 210. Mounting plate; 220. Massage head;

[0040] 300. Pneumatic unit;

[0041] 310. Air source device; 311. Negative pressure air inlet; 312. Positive pressure air outlet;

[0042] 320. Fluid distribution device; 321. Distribution air inlet; 322. Distribution air filling port; 323. Distribution exhaust port;

[0043] 330. Gas storage tank;

[0044] 340. Low-pressure generator; 341. Low-pressure port; 342. First opening; 343. Second opening;

[0045] L, First axis. Detailed Implementation

[0046] To facilitate understanding of this utility model, it will be described in more detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the utility model. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or there may be one or more intervening elements between them. When an element is described as being "connected to" another element, it can be directly connected to the other element, or there may be one or more intervening elements between them.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the invention, are intended to cover non-exclusive inclusion.

[0048] In the description of the embodiments of this utility model, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" 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 the embodiments of this utility model 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 the embodiments of this utility model.

[0049] In the description of the embodiments of this utility model, the terms "first," "second," etc., are used to define components merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this utility model. In the description of the embodiments of this utility model, "multiple" means two or more, unless otherwise explicitly defined.

[0050] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. 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. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0051] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0052] Please see Figures 1 to 4 As shown, the telescopic transmission member 100 provided in this embodiment of the present invention is capable of switching between an extended state and a retracted state.

[0053] For details, please refer to [link / reference]. Figures 1 to 4 The telescopic transmission component 100 includes a telescopic shaft 1 and an airbag 2. The airbag 2 is configured to be able to switch pneumatically between a contracted state and an extended state, such as expanding and extending in an inflated state and deflating and contracting in an deflated state. The telescopic shaft 1 is engaged with the airbag 2 and can be driven to extend and retract by the airbag 2. The airbag 2 can be driven to rotate around an axis by the telescopic shaft 1.

[0054] In this embodiment of the invention, the first axis L is taken as the axis around which the telescopic shaft 1 and the airbag 2 rotate. Specifically, the telescopic shaft 1 and the airbag 2 have a first end and a second end along the axial direction of the first axis L. Exemplarily, the first end and the second end of the airbag 2 are respectively connected to the first end and the second end of the telescopic shaft 1, so that the airbag 2 can drive the telescopic shaft 1 to extend and retract, and the extension and retraction direction of the telescopic shaft 1 is parallel to the first axis L.

[0055] In some embodiments, please refer to Figures 2 to 4The telescopic transmission component 100 also includes a first fixing plate 3. The first end of the airbag 2 is sealed and joined to the first fixing plate 3, and the first fixing plate 3 is connected to the first end of the telescopic shaft 1. The first fixing plate 3 indirectly connects the first end of the airbag 2 to the first end of the telescopic shaft 1, so that the airbag 2 and the telescopic shaft 1 are stably engaged and the torque is transmitted synchronously. When the airbag 2 extends or retracts, its first end moves relative to its second end, and the first end of the airbag 2 can drive the first end of the telescopic shaft 1 to move relative to its second end through the first fixing plate 3, so as to drive the telescopic shaft 1 to extend or retract.

[0056] In some embodiments, please refer to Figures 2 to 4 The telescopic transmission component 100 also includes a second fixing plate 4. The second end of the airbag 2 is sealed and joined to the second fixing plate 4, and the second fixing plate 4 is connected to the second end of the telescopic shaft 1. The second fixing plate 4 indirectly connects the second end of the airbag 2 to the second end of the telescopic shaft 1, so that the airbag 2 and the telescopic shaft 1 are stably engaged and the torque is transmitted synchronously. When the airbag 2 extends or retracts, its second end moves relative to its first end, and the second end of the airbag 2 can drive the second end of the telescopic shaft 1 to move relative to its first end through the second fixing plate 4, so as to drive the telescopic shaft 1 to extend or retract.

[0057] When the telescopic transmission component 100 includes both a first fixed plate 3 and a second fixed plate 4, the telescopic shaft 1 can be extended by moving away from each other, while the telescopic shaft 1 can be contracted by moving closer together.

[0058] It should be noted that, in this embodiment, the inflation space of the airbag 2 is formed by the airbag 2, the first fixing plate 3, and the second fixing plate 4. Furthermore, the first fixing plate 3 and the second fixing plate 4 are respectively connected to the first end and the second end of the telescopic shaft 1. Therefore, the telescopic shaft 1 passes through the airbag 2, and the inflation space of the airbag 2 is formed by the telescopic shaft 1, the airbag 2, the first fixing plate 3, and the second fixing plate 4. This inflation space may not include the space inside the telescopic shaft 1.

[0059] The air vents for fluid communication between the airbag body 2 and the external air source can be directly located in at least one of the first fixed plate 3, the second fixed plate 4, and the telescopic shaft 1. This eliminates the need for additional pipes to connect the inflation space of the airbag body 2 to the external air source, reducing the cost of the telescopic transmission component 100 and making it more compact and smaller in size. Optionally, the airbag body 2 can have any configuration, including cylindrical, columnar, or corrugated tubular shapes.

[0060] Optionally, the airbag body 2 is specifically an air bag that can be inflated and expanded and deflated and folded, including air bags that can have a single-layer bag body or multiple-layer bag bodies.

[0061] In some embodiments, please refer to Figures 2 to 4 The airbag body 2 is a bag with openings at both the first and second ends. The first and second ends of the airbag body 2 are respectively sealed and joined to the first fixing plate 3 and the second fixing plate 4, which respectively seal the two openings at the first and second ends of the airbag body 2. The edges of the openings of the airbag body 2 can be bonded to the first fixing plate 3 or the second fixing plate 4, for example, by adhesive, or by compression.

[0062] In some embodiments, please refer to Figures 2 to 4 The telescopic transmission component 100 also includes a first pressing plate 5, through which the first end of the airbag body 2 is sealed and joined to the first fixing plate 3. Exemplarily, the first fixing plate 3 has an annular pressing groove, and the first pressing plate 5 is an annular pressing plate adapted to the annular pressing groove of the first fixing plate 3. The edge of the opening at the first end of the airbag body 2 is clamped between the first fixing plate 3 and the first pressing plate 5, and the first pressing plate 5 presses the edge of the opening at the first end of the airbag body 2 into the annular pressing groove, achieving a sealed connection between the edge of the opening at the first end of the airbag body 2 and the first pressing plate 5. Optionally, the first pressing plate 5 and the first fixing plate 3 can be further fixedly connected by screws or bolts to prevent the first end of the airbag body 2 from detaching.

[0063] In some embodiments, please refer to Figures 2 to 4 The telescopic transmission component 100 also includes a second pressing plate 6, through which the second end of the airbag 2 is sealed and joined to the second fixing plate 4. Exemplarily, the second fixing plate 4 may have an annular pressing groove similar to that of the first fixing plate 3. The second pressing plate 6 is an annular pressing plate adapted to the annular pressing groove of the second fixing plate 4. The edge of the opening at the second end of the airbag 2 is clamped between the second fixing plate 4 and the second pressing plate 6. The second pressing plate 6 adaptably presses the edge of the opening at the second end of the airbag 2 into the annular pressing groove of the second fixing plate 4, achieving a sealed connection between the edge of the opening at the second end of the airbag 2 and the first pressing plate 5. Optionally, the second pressing plate 6 and the second fixing plate 4 may be further fixedly connected by screws or bolts to prevent the second end of the airbag 2 from detaching.

[0064] In some other embodiments, the airbag 2 is bag-shaped. That is, the inflation space of the airbag 2 is defined by itself, and the inflation space is set outside the telescopic shaft 1, and is not enclosed by at least one of the first fixing plate 3, the second fixing plate 4 and the telescopic shaft 1.

[0065] When air is inflated into the inflation space of the airbag 2, the airbag 2 expands and extends, driving the first fixing plate 3 away from the second fixing plate 4, and causing the telescopic shaft 1 to extend. When the airbag 2 deflates and contracts, the first fixing plate 3 may move closer to the second fixing plate 4 under the action of external force and / or the contraction of the airbag 2, causing the telescopic shaft 1 to contract.

[0066] In some embodiments, please refer to Figures 2 to 4 At least one of the first fixing plate 3 and the second fixing plate 4 is detachably connected to the telescopic shaft 1. The first fixing plate 3 and / or the second fixing plate 4 are detachably installed on the telescopic shaft 1. When installing or removing the airbag body 2, the connection between one of the first fixing plate 3 and the second fixing plate 4 and the telescopic shaft 1 can be disengaged, allowing the telescopic shaft 1 to be easily inserted into the airbag body 2, facilitating the installation and removal of the airbag body 2. Optionally, the first fixing plate 3 is fixedly connected to the first end of the telescopic shaft 1. Optionally, the second fixing plate 4 is detachably connected to the second end of the telescopic shaft 1.

[0067] In a preferred embodiment, the first fixing plate 3 and the first end of the telescopic shaft 1 can be integrally formed, or the second fixing plate 4 and the second end of the telescopic shaft 1 can be integrally formed.

[0068] In some embodiments, please refer to Figures 2 to 4 The telescopic transmission component 100 also includes a transmission member 7. The first end of the transmission member 7 is connected to the telescopic shaft 1, and the second end of the transmission member 7 is used for transmission connection with the drive device. That is, the drive device is transmission connected to the telescopic shaft 1 through the transmission member 7.

[0069] Specifically, the transmission component 7 is a shaft. The first end of the transmission component 7 is connected to the telescopic shaft 1, and the driving device is connected to the second end of the transmission component 7. Exemplarily, the driving device includes a worm gear, a worm, and a motor. The worm meshes with the worm wheel, and the motor is connected to the worm and can drive the worm to rotate for transmission. The worm wheel is assembled on the transmission component 7, for example, by sleeve on the transmission component 7 and splined, thereby connecting the transmission component 7 to the worm wheel. When the motor drives the worm wheel to rotate via the worm, it can drive the transmission component 7 to rotate, which in turn drives the telescopic shaft 1 to rotate.

[0070] Alternatively, the drive unit can be a disc motor, with the output shaft of the disc motor connected to the second end of the transmission component 7 via a coupling.

[0071] In some embodiments, please refer to Figures 2 to 4The transmission component 7 has an air passage 71 that is fluidly connected to the inflation space inside the airbag body 2. Exemplarily, the air passage 71 extends from the second end face of the transmission component 7 to the side wall of the transmission component 7 near the first end face, and has an opening in the side wall near the first end face to connect to the inflation space of the airbag body 2. By providing the air passage 71 in the transmission component 7, it is convenient to connect the inflation space inside the airbag body 2 to an air source through the air passage 71, so as to inflate or deflate the inflation space inside the airbag body 2. Specifically, in the assembly of connecting the inflation space of the airbag body 2 to an external air source using a rotary joint, one end of the rotary joint is connected to the transmission component 7 and is fluidly connected to the air passage 71. For example, the air passage 71 extends to the end face of the second end of the transmission component 7, and the rotary joint is connected to the port of the air passage 71; the other end of the rotary joint is connected to an external air source, for example, fluidly connected to the pneumatic unit 300 described below through a pipe. When the worm gear is assembled on the transmission component 7, the transmission component 7 can pass through the worm gear, so that the air passage 71 port on the end face of the transmission component 7 is located on the side of the worm gear away from the airbag body 2, which facilitates the rotary joint to be connected to the port of the air passage 71.

[0072] In a preferred embodiment, the transmission component 7 and the second fixing plate 4 can be an integral structure.

[0073] In some embodiments, please refer to Figures 2 to 4 The transmission component 7 is provided with a connecting seat 72, which protrudes from the second fixed plate 4 towards the first fixed plate 3. The connecting seat 72 is used to connect with the telescopic shaft 1, and the port of the air passage 71 is opened on the outer surface of the side wall of the connecting seat 72. The second end of the telescopic shaft 1 is a non-movable end relative to the first end, and the port of the air passage 71 is spaced apart from the second end of the telescopic shaft 1. Exemplarily, the second end of the telescopic shaft 1 is connected to the connecting seat 72, for example, by screws; the second end of the telescopic shaft 1 is connected to the top surface of the connecting seat 72 facing the first fixed plate 3, and the port of the air passage 71 is located on the side of the connecting seat 72. In this way, the second end of the telescopic shaft 1 will not cover the port of the air passage 71, and the mounting seat is located inside the airbag body 2, with the air passage 71 in fluid communication with the inflation space inside the airbag body 2.

[0074] In a preferred embodiment, the connecting seat 72 can be a fixed structure on the transmission member 7 or an integrally formed structure.

[0075] For the telescopic shaft 1 mentioned above, please refer to Figure 4 and Figure 5The telescopic shaft 1 includes a first shaft segment 11 and a second shaft segment 12. The first shaft segment 11 and the second shaft segment 12 are axially telescopically sliding relative to each other, and the first end and the second end of the airbag body 2 are respectively engaged with the first shaft segment 11 and the second shaft segment 12. Exemplarily, the first shaft segment 11 and the second shaft segment 12 are sleeved together, and the second shaft segment 12 can slide within the first shaft segment 11, thereby enabling the first shaft segment 11 and the second shaft segment 12 to telescopically slide relative to each other, achieving extension or contraction. The first shaft segment 11 is connected to the first fixing plate 3, and the second shaft segment 12 is connected to the second fixing plate 4, so that the first shaft segment 11 and the second shaft segment 12 are respectively connected to the first end and the second end of the airbag body 2. It can be understood that when the telescopic shaft 1 drives the airbag body 2 to rotate around the axis of the telescopic shaft 1, the torque transmission process is dominated by the telescopic shaft 1; therefore, the first shaft segment 11 and the second shaft segment 12 can transmit torque to each other in the circumferential direction.

[0076] In some embodiments, please refer to Figure 5 The first shaft segment 11 is provided with a first guide groove 113 extending axially, and the second shaft segment 12 is provided with a first guide rib 121 extending axially, the first guide rib 121 fitting into the first guide groove 113. Specifically, the first guide groove 113 is disposed on the wall surface of the first shaft segment 11, such as being integrally formed on the inner wall of the first shaft segment 11; the first guide rib 121 is specifically disposed on the wall surface of the second shaft segment 12, such as being integrally formed on the outer wall of the second shaft segment 12. Furthermore, multiple first guide ribs 121 can be provided, and the multiple first guide ribs 121 are evenly distributed along the circumference of the second shaft segment 12; correspondingly, multiple first guide grooves 113 are provided, evenly distributed along the circumference of the first shaft segment 11. The first guide rib 121 and the first guide groove 113 are adapted to form a spline snap-fit ​​structure, so that the first guide rib 121 can slide in the first guide groove 113 in a direction parallel to the first axis L, and restrict the rotation of the first shaft segment 11 relative to the second shaft segment 12 in the circumferential direction, thereby realizing the torque transmission between the first shaft segment 11 and the second shaft segment 12.

[0077] In some embodiments, the first shaft segment 11 and the second shaft segment 12 are limited in their extension stroke along the telescopic axis by a limiting step. For details, please refer to [link to relevant documentation]. Figure 5 The second shaft segment 12 passes through the first shaft segment 11. The inner wall of the second end of the first shaft segment 11 is provided with a first limiting step 114, and the outer circumferential surface of the first end of the second shaft segment 12 is provided with a second limiting step 122. When the airbag body 2 extends and drives the telescopic shaft 1 to the extension limit position, the first limiting step 114 abuts against the second limiting step 122, preventing the second shaft segment 12 from extending further out of the first shaft segment 11. This limits the distance of relative extension and sliding between the first shaft segment 11 and the second shaft segment 12, avoiding the problem of the second shaft segment 12 and the first shaft segment 11 detaching from each other. Optionally, the first guide groove 113 extends to the first limiting step 114.

[0078] It should be noted that, in this embodiment of the present invention, the first shaft segment 11 and the second shaft segment 12 are relative to two shaft segments respectively connected to the two ends of the airbag body 2. That is, for two mutually slidable and telescopic shaft segments, the shaft segment connected to the first end of the airbag body 2 is at least referred to as the first shaft segment 11, and the shaft segment connected to the second end of the airbag body 2 is at least referred to as the second shaft segment 12. For example, Figure 5 In the middle section, the uppermost first shaft segment 11 is used to connect with the first end of the airbag body 2; the middle shaft segment can also be called the first shaft segment 11, and multiple first shaft segments 11 can be set, and multiple first shaft segments 11 are connected to each other in a similar way to the first shaft segment 11 and the second shaft segment 12; the lowermost shaft segment is used to connect with the second end of the airbag body 2, and can be called the second shaft segment 12. Multiple second shaft segments 12 can also be set, and multiple second shaft segments 12 are connected to each other in a similar way to the first shaft segment 11 and the second shaft segment 12.

[0079] It is understood that the telescopic shaft 1 can be a multi-segment telescopic shaft, such as including a third segment, a fourth segment, a fifth segment, etc., so that the telescopic shaft 1 can include three or more segments, extending the extension length of the telescopic shaft 1. Adjacent segments can be connected by a similar connection method as the first segment 11 and the second segment 12 to achieve mutual sliding connection. For example, the telescopic shaft 1 includes multiple segments that are sequentially nested together. Between any two segments that are nested together, there can be a mating structure between the first guide rib 121 and the first guide groove 113, and a limiting mating structure between the first limiting step 114 and the second limiting step 122.

[0080] Furthermore, in the configuration of the telescopic shaft 1 as a multi-segment structure, the first end of the shaft segment closest to the first fixed plate 3 is connected to the first fixed plate 3, while the second end of the shaft segment closest to the second fixed plate 4 is connected to the second fixed plate 4, so that the airbag 2, whose two ends are respectively connected to the first fixed plate 3 and the second fixed plate 4, can drive the multi-segment telescopic shaft 1 to extend and retract at its maximum stroke during pneumatic extension and retraction.

[0081] In some embodiments, please refer to Figure 4 and Figure 5As shown, the telescopic shaft 1 also includes a third shaft segment 14. The first shaft segment 11, the second shaft segment 12, and the third shaft segment 14 are sequentially sleeved together. The second shaft segment 12 is sleeved on the third shaft segment 14, and the second shaft segment 12 and the third shaft segment 14 are respectively provided with mutually cooperating second guide grooves 123 and second guide ribs 141. The second end of the second shaft segment 12 and the first end of the third shaft segment 14 are respectively provided with mutually cooperating third limiting steps 124 and fourth limiting steps 142. The first end of the first shaft segment 11 is connected to the first fixing plate 3, and the second end of the third shaft segment 14 is connected to the second fixing plate 4 or to the connecting seat 72. That is, relative to the telescopic shaft 1 with two shaft segments, the three-segment telescopic shaft 1 is connected to the second fixing plate 4 by the third shaft segment 14, so that the first end and the second end of the telescopic shaft 1 are respectively connected to the first fixing plate 3 and the second fixing plate 4. The second guide groove 123 is similar to the first guide groove 113; the second guide rib 141 is similar to the first guide rib 121; the third limiting step 124 is similar to the first limiting step 114; and the fourth limiting step 142 is similar to the second limiting step 122. These will not be described in detail here.

[0082] In some embodiments, the telescopic shaft 1 is hollow. Specifically, multiple shaft segments of the telescopic shaft 1 are hollow and interconnected to allow for gas flow. For example, the first shaft segment 11 and the second shaft segment 12 are both hollow and interconnected, giving the telescopic shaft 1 a supporting filling space 13. That is, the supporting filling space 13 is at least partially located within the first shaft segment 11, and when the second shaft segment 12 is cylindrical, the supporting filling space 13 is also partially located within the second shaft segment 12. Furthermore, the first shaft segment 11 has a vent hole 111, which can be specifically located near the first end of the first shaft segment 11. This vent hole 111 allows the supporting filling space 13 to communicate with the inflation space of the airbag 2 when the first shaft segment 11 and the second shaft segment 12 slide relative to each other, allowing gas in the inflation space of the airbag 2 to flow through the vent hole 111 into the supporting filling space 13 of the telescopic shaft 1.

[0083] It is understandable that when the first shaft segment 11 and the second shaft segment 12 slide and extend relative to each other, the volume of the supporting filling space 13 changes, resulting in air resistance when the first shaft segment 11 slides and extends relative to the second shaft segment 12. However, by opening a vent 111 in the first shaft segment 11 to conduct fluid between the supporting filling space 13 and the inflation space of the airbag 2, the air pressure in the supporting filling space 13 and the air pressure in the inflation space of the airbag 2 are balanced, thus improving the problem of air resistance when the first shaft segment 11 slides relative to the second shaft segment 12, improving the problem that the telescopic shaft 1 is not easily stretched or contracted, and ensuring that the overall telescopic transmission component 100 maintains a stable pneumatic support effect when extended.

[0084] In other embodiments, when the first shaft segment 11 and the second shaft segment 12 are nested together, after the first shaft segment 11 retracts relative to the second shaft segment 12, the second end of the first shaft segment 11 can cover the second shaft segment 12 and the air passage 71 port located on the side of the connecting seat 72. Preferably, a through hole 112 corresponding to the air passage 71 port is provided on the first shaft segment 11, so that after the first shaft segment 11 retracts relative to the second shaft segment 12, the port of the air passage 71 can still maintain fluid communication with the inflation space of the airbag body 2 through the through hole 112, ensuring that gas can flow smoothly into the inflation space of the airbag body 2 during the initial inflation stage to inflate the airbag body 2, and that gas can completely flow into the air passage 71 and be discharged through the through hole 112 during the final exhaust stage, so that the airbag body 2 is completely deflated, ensuring that the airbag body 2 is completely retracted back to its original position. Optionally, the through hole 112 is opened on the side wall of the first shaft segment 11 near the second end face and corresponds to the port of the air passage 71.

[0085] In some embodiments, please refer to Figures 2 to 4 As shown, to facilitate the assembly of the second shaft segment 12, the first shaft segment 11 is axially continuous along the first axis L, allowing the second shaft segment 12 to be inserted into the first shaft segment 11 from its first end. The telescopic transmission component 100 also includes a sealing plate 8, which seals the first end of the first shaft segment 11, thereby sealing the support filling space 13 and preventing air leakage from the inflation space within the airbag body 2. Optionally, the sealing plate 8 can be detachably installed on the first shaft segment 11 using screws.

[0086] Preferably, the first fixing plate 3 can be integrally formed on the first end of the first shaft segment 11, and the first fixing plate 3 is provided in a flange structure on the periphery of the first end of the first shaft segment 11. In this case, the sealing plate 8 can be detachably installed on the first fixing plate 3 by screws to seal the first end of the first shaft segment 11.

[0087] In some embodiments, please refer to Figures 2 to 4 The telescopic transmission component 100 also includes a sealing ring 9, which is clamped between the sealing plate 8 and the first fixed plate 3. It is understood that the sealing ring 9 surrounds the through opening at the first end of the first shaft segment 11, enhancing the sealing effect on the through opening. Optionally, the sealing ring 9 is an elastic ring such as a rubber ring or a silicone ring.

[0088] As one application of the telescopic transmission component 100, this utility model embodiment also provides a massage system; please refer to [link / reference]. Figure 6 The massage system includes a massage component 200 and a drive device. The drive device is used to drive the massage component 200 through a telescopic transmission component 100 to move the massage component 200.

[0089] The massage component 200 can be fixed to the first end of the telescopic shaft 1 by bolts or other fasteners. Alternatively, the massage component 200 can be simultaneously connected to the first end of the airbag body 2 and the first end of the telescopic shaft 1. Thus, when the airbag body 2 drives the telescopic shaft 1 to extend or retract, the massage component 200 moves and switches between an extended position and a retracted position. The extended position and the retracted position are two positions where the massage component 200 moves along a direction parallel to the first axis L. The extended position is specifically the working position of the massage component 200, and the retracted position is specifically the storage position of the massage component 200.

[0090] When the drive device outputs power, it drives the telescopic shaft 1 to move, and the telescopic shaft 1 drives the airbag body 2 and the massage component 200 to move. The power output by the drive device may include rotational torque, swing torque, or movement torque, and drives the massage component 200 to move via the telescopic transmission component 100. This may include driving the massage component 200 to rotate, or driving the massage component 200 to move or swing.

[0091] In this embodiment of the invention, the massage system drives the massage component 200 to rotate via the telescopic transmission component 100 to achieve rolling massage, combining the advantages of mechanical massage and pneumatic massage.

[0092] The rapid response of the airbag 2 in its inflation and deflation states enables the overall telescopic transmission component 100 to switch quickly between extended and retracted states. In the extended state, it provides cushioning support, ensuring high safety during use of the massage system and improving the problems of low switching response efficiency and poor cushioning effect in mechanical massage. The movement of the massage component 200 between the extended and retracted positions is achieved by the pneumatic extension and retraction of the airbag 2, which drives the telescopic shaft 1 to extend and retract, allowing for efficient and rapid switching between the extended and retracted positions.

[0093] The telescopic shaft 1 drives the airbag 2 to rotate around its axis. During torque transmission, the telescopic shaft 1 is the primary driver, while the airbag 2 plays a secondary role, achieving efficient rotational torque transmission. This improves the low torque transmission efficiency of pneumatic massage and addresses the issues of the airbag 2 being easily twisted, deformed, or even damaged by torque. Furthermore, it can transmit continuous and regular rotational torque, achieving controllable and reliable torque transmission. When the telescopic transmission component 100 drives the massage component 200, it improves the massage intensity, addressing the weakness of massage achieved through the airbag, increasing the massage speed, and achieving controllable and reliable rolling massage.

[0094] Furthermore, the telescopic transmission component 100, which includes a telescopic shaft 1 and an airbag body 2, can drive the massage component 200 to extend and retract, and provides cushioned support when the massage component 200 is working, ensuring the stability of the massage component 200 when moving between the extended position and the retracted position, reducing shaking when performing massage actions, and driving the massage component 200 to perform massage actions including rotation through transmission torque.

[0095] For the massage component 200 mentioned above, please refer to Figure 6 The massage component 200 includes a mounting plate 210 and a massage head 220. The mounting plate 210 is connected to the telescopic transmission component 100. The massage head 220 is located on the side of the mounting plate 210 opposite to the telescopic transmission component 100 and is spaced apart from the first axis L. When the telescopic transmission component 100 rotates around the first axis L, it drives the massage head 220 to rotate around the first axis L, thereby realizing rolling kneading massage. Optionally, the massage head 220 can be detachably mounted on the mounting plate 210; and the mounting of the massage head 220 on the mounting plate 210 can be a fixed mounting, such as being mounted on the mounting plate 210 with screws or being integrally formed, or the massage head 220 can be movably mounted on the mounting plate 210, preferably a movable mounting.

[0096] The massage component 200 can be specifically joined to the first fixing plate 3. Optionally, the first fixing plate 3 and the mounting plate 210 can be detachably connected, for example, by screws. It is understood that the mounting plate 210 can also be simultaneously fixed to the first end of the telescopic shaft 1 and the airbag body 2; the massage component 200 can also be directly mounted on the telescopic shaft 1, and the massage component 200 can be mounted and connected to the airbag body 2.

[0097] When the mounting plate 210 is detachably connected to the first fixing plate 3, the sealing plate 8 can be sandwiched between the mounting plate 210 and the first fixing plate 3.

[0098] When the massage component 200 is driven to rotate around the first axis L by the drive device to achieve rolling kneading massage, the rotation speed and direction of the massage component 200 can be controlled during the massage process to achieve different massage effects.

[0099] In some embodiments, please refer to Figure 7This utility model embodiment also provides a telescopic transmission system, which includes the aforementioned telescopic transmission component 100 and a pneumatic unit 300. The pneumatic unit 300 is in fluid communication with the telescopic transmission component 100, specifically with the airbag 2. The pneumatic unit 300 is used to supply air to the airbag 2 or to extract air from the airbag 2, so that the airbag 2 switches between an extended state and a contracted state. When the pneumatic unit 300 supplies air to the airbag 2, the airbag 2 inflates and expands, pushing the massage component 200 out, and finally the airbag 2 is in the extended state, with the massage component 200 in the extended position. When the pneumatic unit 300 extracts air from the airbag 2, the airbag 2 deflates and contracts, causing the massage component 200 to retract, and finally the airbag 2 is in the contracted state, with the massage component 200 in the retracted position. It can be understood that the airbag 2 can also be connected to the atmospheric environment to release air.

[0100] In some embodiments, please refer to Figure 7 The pneumatic unit 300 includes an air source device 310, which is in fluid communication with the airbag body 2. Exemplarily, the air source device 310 includes, but is not limited to, an air pump, an air compressor, etc. The air source device 310 can be a reversible air pump, capable of supplying air to the airbag body 2 from a single air port in the forward direction, or drawing air from the airbag body 2 in the reverse direction.

[0101] Alternatively, the air source device 310 may be equipped with a negative pressure inlet 311 and a positive pressure outlet 312. The negative pressure inlet 311 is used for gas inflow, and the positive pressure outlet 312 is used for compressed gas outflow. When the air source device 310 is working, it draws in gas through the negative pressure inlet 311 and then discharges the compressed gas through the positive pressure outlet 312 to supply air to the airbag 2. When the air source device 310 only supplies air to the airbag 2, the negative pressure inlet 311 of the air source device 310 can be fluidly connected to the external environment, such as directly connected to the atmosphere, and the positive pressure outlet 312 of the air source device 310 can be fluidly connected to the airbag 2. Alternatively, the negative pressure inlet 311 of the air source device 310 can be connected to the vent port of the airbag 2 to accelerate the deflation of the airbag 2 by drawing in gas. When air is supplied to the airbag 2 through the positive pressure outlet 312, the extension response speed of the telescopic transmission member 100 is improved.

[0102] In some embodiments, please refer to Figure 7 The pneumatic unit 300 also includes a fluid distribution device 320. The air source device 310 is in fluid communication with the airbag body 2 through the fluid distribution device 320, forming a pneumatic system. The fluid distribution device 320 is used to control the opening and closing of the deflation air passage of the airbag body 2, and to control the opening and closing of the inflation air passage between the airbag body 2 and the air source device 310.

[0103] In some embodiments, please refer to Figure 7The fluid distribution device 320 is provided with a distribution air inlet 321, a distribution inflation port 322, and a distribution exhaust port 323. The fluid distribution device 320 has an inflation state in which the distribution air inlet 321 is connected to the distribution inflation port 322 and the distribution exhaust port 323 is closed; an exhaust state in which the distribution air inlet 321 is closed and the distribution inflation port 322 is connected to the distribution exhaust port 323; and a holding state in which the distribution air inlet 321 and the distribution exhaust port 323 are closed. Among them, the positive pressure air outlet 312 of the air source device 310 is in fluid communication with the distribution air inlet 321 of the fluid distribution device 320, and the distribution inflation port 322 is in fluid communication with the airbag body 2. For example, the distribution inlet 321 and the positive pressure outlet 312 are fluidly connected through a pipe, the distribution inflation port 322 and the airbag body 2 are fluidly connected through a pipe, and the distribution exhaust port 323 is fluidly connected to the atmospheric environment. When the distribution inlet 321 and the distribution inflation port 322 are connected while the distribution exhaust port 323 is closed, the airbag body 2 is fluidly connected to the air source device 310, and the compressed gas in the air source device 310 is introduced into the airbag body 2, i.e., the fluid distribution device 320 is in an inflation state at this time. When the distribution inlet 321 is closed while the distribution inflation port 322 and the distribution exhaust port 323 are connected, the airbag body 2 is fluidly connected to the atmospheric environment, and the high-pressure gas in the airbag body 2 is discharged into the atmospheric environment, i.e., the fluid distribution device 320 is in an exhaust state at this time. When the distribution inlet 321 is closed and the distribution exhaust port 323 is closed, the airbag body 2 is sealed and isolated from the air source device 310 and the atmospheric environment, i.e., the fluid distribution device 320 is in a holding state at this time. The fluid distribution device 320 may be selected, but is not limited to, air valves, such as solenoid valves or SMA (Shape Memory Alloy) valves, including three-position three-way solenoid valves.

[0104] In other embodiments, the distribution exhaust port 323 of the fluid distribution device 320 is fluidly connected to the negative pressure air inlet 311 of the air source device 310. For example, the distribution exhaust port 323 and the negative pressure air inlet 311 are fluidly connected through a pipe, that is, the air source device 310 draws gas from the airbag 2 to achieve deflating. By drawing gas from the airbag 2 to deflate the airbag 2, the degree of deflation of the airbag 2 is increased, prompting the airbag 2 to deflate more completely and in a shorter time. That is, the airbag 2 can quickly and completely deflate and reset, ensuring the extension and retraction stroke of the telescopic transmission member 100. This allows the massage member 200 to be quickly retracted into place, ensuring that the massage member 200 can quickly retract from the extended position to the retracted position and ensure the stroke for the next massage operation, making the massage start-up response faster and enhancing the massage experience.

[0105] In some embodiments, there are multiple fluid distribution devices 320 and multiple airbags 2. The multiple fluid distribution devices 320 are used to control the opening and closing of the deflating air passage of the multiple airbags 2, and to control the opening and closing of the inflation air passage between the multiple airbags 2 and the air source device 310. Moreover, the multiple fluid distribution devices 320 and the multiple airbags 2 can share the same air source device 310, so that a single pneumatic unit 300 can control the inflation and deflation of the multiple airbags 2 respectively.

[0106] In some embodiments, the distribution inlets 321 of multiple fluid distribution devices 320 are in fluid communication with the positive pressure outlet 312 of the same air source device 310. That is, multiple fluid distribution devices 320 share a single air source device 310, which helps to reduce the production cost of the telescopic transmission system. In addition, the distribution exhaust ports 323 of multiple fluid distribution devices 320 can be in fluid communication with the negative pressure inlet 311 of the same air source device 310 to achieve unified exhaust.

[0107] In some embodiments, please refer to Figure 7 The pneumatic unit 300 also includes an air storage tank 330, which is fluidly connected between the positive pressure outlet 312 of the air source device 310 and the distribution inlet 321 of the fluid distribution device 320. The air storage tank 330 can be a metal tank, a plastic tank, etc., and can contain high-pressure gas. The storage of high-pressure gas in the air storage tank 330 is beneficial for improving the inflation stroke and inflation response speed of the airbag 2.

[0108] In some embodiments, the pneumatic unit 300 includes a low-pressure generator 340 connected between the distribution exhaust port 323 of the fluid distribution device 320 and the negative pressure air inlet 311 of the air source device 310. The low-pressure generator 340 can realize negative pressure exhaust of the airbag body 2, thereby enhancing the degassing effect of the airbag body 2.

[0109] For the aforementioned low-voltage generator 340, please refer to Figure 7 The low-pressure generator 340 is provided with a low-pressure port 341, a first opening 342, and a second opening 343. The low-pressure port 341 is in fluid communication between the first opening 342 and the second opening 343. The low-pressure port 341 is used to generate negative pressure when gas flows from the first opening 342 to the second opening 343. That is, the gas pressure at the low-pressure port 341 is lower than atmospheric pressure. Exemplarily, the low-pressure generator 340 is tubular, with the first opening 342 and the second opening 343 at its two ends, respectively. The low-pressure port 341 can penetrate through the tube wall of the low-pressure generator 340.

[0110] During the process of gas flowing from the first opening 342 to the second opening 343, the flow velocity of the gas flowing from the first opening 342 to the second opening 343 is greater than the flow velocity of the gas in the low-pressure port 341. Since the faster the fluid flow velocity, the lower its pressure, the gas pressure of the gas flowing from the first opening 342 to the second opening 343 is less than the gas pressure in the low-pressure port 341, which causes the gas pressure at the low-pressure port 341 to decrease and fall below atmospheric pressure, i.e., negative pressure is generated.

[0111] When the telescopic transmission system of this utility model is working, the air source device 310 is activated.

[0112] When the pneumatic unit 300 supplies air to the airbag 2: the fluid distribution device 320 connects the distribution air inlet 321 and the distribution inflation port 322 while closing the distribution exhaust port 323. At this time, the fluid distribution device 320 is in an inflation state, and the airbag 2 is fluidly connected to the positive pressure air outlet 312 of the air source device 310, causing the airbag 2 to inflate and extend. When the airbag 2 inflates and extends, it simultaneously drives the telescopic shaft 1 to extend, that is, the telescopic transmission component 100 extends.

[0113] When the telescopic transmission component 100 is in the extended state: both the distribution air inlet 321 and the distribution exhaust outlet 323 are closed. At this time, the airbag 2 cannot be inflated or deflated, that is, the airbag 2 is pressurized, and the telescopic transmission component 100 remains in the extended state.

[0114] When the airbag 2 deflates, the pneumatic unit 300 draws in the gas from the airbag 2. The fluid distribution device 320 closes the distribution inlet 321 while the distribution inflation port 322 and the distribution exhaust port 323 are connected. At this time, the fluid distribution device 320 is in the exhaust state. The airbag 2 is fluidly connected to the negative pressure inlet 311 of the air source device 310 or to the low pressure port 341 of the low pressure generator 340, causing the airbag 2 to deflate and contract. When the airbag 2 deflates and contracts, it simultaneously drives the telescopic shaft 1 to retract, that is, the telescopic transmission component 100 contracts.

[0115] When the telescopic transmission component 100 remains in the contracted state: the air inlet 321 is closed, and the airbag 2 cannot be inflated or deflated, that is, the airbag 2 remains in the normal state, and the telescopic transmission component 100 remains in the contracted state.

[0116] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; under the concept of this utility model, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of this utility model as described above. For the sake of brevity, they are not provided in detail; although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A telescopic transmission component, characterized in that, The device includes an airbag body and a telescopic shaft. The airbag body is configured to pneumatically switch between a contracted state and an extended state. The telescopic shaft is engaged with the airbag body and can be extended or retracted by the airbag body. The airbag body can be rotated about an axis by the telescopic shaft.

2. The telescopic transmission component according to claim 1, characterized in that, The telescopic transmission component further includes a first fixed plate, the first end of the airbag body is sealed and joined to the first fixed plate, and the first end of the telescopic shaft is connected to the first fixed plate.

3. The telescopic transmission component according to claim 2, characterized in that, The telescopic transmission component further includes a first pressing plate, and the first end of the airbag body is sealed and joined to the first fixing plate through the first pressing plate.

4. The telescopic transmission component according to claim 1, characterized in that, The telescopic transmission component further includes a second fixing plate, the second end of the airbag body is sealed and joined to the second fixing plate, and the second end of the telescopic shaft is connected to the second fixing plate.

5. The telescopic transmission component according to claim 4, characterized in that, The telescopic transmission component further includes a second pressing plate, and the second end of the airbag body is sealed and joined to the second fixing plate through the second pressing plate.

6. The telescopic transmission component according to claim 1, characterized in that, It also includes a transmission component, the first end of which is connected to the telescopic shaft, and the second end of which is used for transmission connection with the drive device.

7. The telescopic transmission component according to claim 6, characterized in that, The transmission component has an air passage that is in fluid communication with the inflation space of the airbag.

8. The telescopic transmission component according to claim 1, characterized in that, The telescopic shaft includes at least a first shaft segment and a second shaft segment. The first shaft segment and the second shaft segment are axially telescopically sliding relative to each other, and the first shaft segment and the second shaft segment are circumferentially transmitting torque to each other. The first end and the second end of the airbag body are respectively engaged with the first shaft segment and the second shaft segment.

9. The telescopic transmission component according to claim 8, characterized in that, The telescopic shaft has a supporting filling space; and the first shaft section is provided with a vent hole for connecting the supporting filling space with the inflation space of the airbag when the first shaft section and the second shaft section are extended relative to each other.

10. A telescopic transmission system, characterized in that, include: The telescopic transmission component as described in any one of claims 1-9; A pneumatic unit is fluidly connected to the air bladder of the telescopic transmission component; the pneumatic unit supplies air to the air bladder or draws air from the air bladder to switch the air bladder between an extended state and a contracted state.

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