Transmission mechanism and drive mechanism

Abstract

The present invention discloses a transmission mechanism and a drive mechanism. The transmission mechanism includes a mounting seat, a drive shaft, and a first movable member. The drive shaft can rotate relative to the mounting seat. The first movable member and the drive shaft are synchronously rotated and assembled together, and the drive shaft can drive the first movable member to rotate relative to the mounting seat to two extreme positions and an intermediate position between the two extreme positions. The transmission mechanism also includes a second movable member sleeved outside the drive shaft. The second movable member can rotate relative to the mounting seat to a first position and a second position. An elastic body and a limiting structure are provided between the second movable member and the mounting seat, and the elastic body and the limiting structure cooperate to drive the second movable member to remain in or return to the first position. A transmission structure is provided between the drive shaft and the second movable member. The drive shaft rotates and drives the second movable member to rotate to a second position through the transmission structure. The second position corresponds to an extreme position. The transmission mechanism has the following advantages: a transmission mechanism can drive the two movable members to move to appropriate positions respectively to achieve three gear switching. The structure is simple, compact, and easy to operate.

Description

Technical Field

[0001] The present invention relates to the technical field of transmission mechanisms and drive mechanisms. Background Art

[0002] In existing equipment, there is often a need to simultaneously control two functional parts to rotate between multiple positions to achieve multiple gears. For example, the first functional part can rotate to three positions, and the second functional part can rotate to two positions. The two functional parts cooperate to control the equipment to be in multiple gears. To achieve the above functions, the existing technology generally requires two sets of drive mechanisms. The two drive mechanisms respectively control the two functional parts to drive them to move to the appropriate positions. For example, CN112502498A includes a switching valve and a control mechanism. The switching valve is used to achieve two intake switches, and the control mechanism is used to achieve intake and exhaust switches, that is, to achieve three gears (first intake gear, second intake gear and exhaust gear). To achieve the above functions, two drive mechanisms are required. On the one hand, this increases costs, has a complex structure, and occupies a large space. On the other hand, the gear switching requires the user to operate twice, which is inconvenient. Summary of the Invention

[0003] The present invention provides a transmission mechanism and a driving mechanism, which overcome the deficiencies of the transmission mechanism in the background art.

[0004] One of the technical solutions adopted by the present invention to solve its technical problems is: a transmission mechanism, including a mounting seat, a drive shaft and a first movable part, the drive shaft can rotate relative to the mounting seat, the first movable part and the drive shaft are synchronously rotated and assembled together, and the drive shaft can drive the first movable part to rotate relative to the mounting seat to two extreme positions and an intermediate position between the two extreme positions; it also includes a second movable part arranged outside the drive shaft, the second movable part can rotate relative to the mounting seat to a first position and a second position, an elastic body and a limiting structure are provided between the second movable part and the mounting seat, and the elastic body and the limiting structure cooperate to drive the second movable part to remain in or reset to the first position, a transmission structure is provided between the drive shaft and the second movable part, and the drive shaft rotates and drives the second movable part to rotate to the second position through the transmission structure, and the second position corresponds to an extreme position.

[0005] In one embodiment: the second movable part is capable of being sleeved on the inner hole of the drive shaft and a first protrusion is convexly provided on the inner circumferential wall of the inner hole. A central angle groove is concavely provided on the drive shaft. The first protrusion is located in the central angle groove and the groove wall of the central angle groove and the first protrusion can abut and cooperate to form the above-mentioned transmission structure.

[0006] In one embodiment: the second movable part is configured to be sleeved on the inner hole of the drive shaft and the inner circumferential wall of the inner hole is recessed with a central angle groove, and a first protrusion is convexly provided on the drive shaft. The first protrusion is located in the central angle groove and the groove wall of the central angle groove and the first protrusion can abut and cooperate to form the above-mentioned transmission structure.

[0007] In one embodiment, a central angle between the first position and the second position is not greater than a central angle between the middle position and an extreme position corresponding to the second position.

[0008] In one embodiment, the central angle of the central angle groove is smaller than the central angles of the two extreme positions and is not smaller than the central angle between the middle position and an extreme position corresponding to the second position.

[0009] In one embodiment: the second movable part is configured to be sleeved on the inner hole of the drive shaft and the inner circumferential wall of the inner hole is convexly provided with a first protrusion, the drive shaft is concavely provided with a central angle groove, the first protrusion is located in the central angle groove, and one of the groove walls of the central angle groove is convexly provided with a push-up protrusion, the push-up protrusion and the first protrusion can be pressed together to form the above-mentioned transmission structure.

[0010] In one embodiment, a second protrusion is provided on the mounting seat, and the second movable member can abut against the second protrusion to form the above-mentioned limiting structure.

[0011] In one embodiment: the mounting base includes a fixed plate, the drive shaft can rotate through the fixed plate, the first movable member is fixed to the drive shaft and is located below the fixed plate, the second movable member is located above the fixed plate, and the elastic body includes a torsion spring, which connects the fixed plate and the second movable member.

[0012] In one embodiment: a reinforcing rib is protruded from the middle of the bottom of the central angle groove, the end face of the reinforcing rib is set as an outer arc surface, the end face of the first protrusion is set as an inner arc surface, and the outer arc surface and the inner arc surface are adapted to each other.

[0013] The second technical solution adopted by the present invention to solve the technical problem is: the driving mechanism includes an operating member and the transmission mechanism, and the operating member and the driving shaft are fixed together.

[0014] Compared with the background technology, this technical solution has the following advantages:

[0015] The drive shaft can drive the first movable part to rotate to two extreme positions and an intermediate position, and through the cooperation of the elastic body and the limit structure, it can drive the second movable part to remain in or reset to the first position. The drive shaft rotates and drives the second movable part to rotate to the second position through the transmission structure. Therefore, one transmission mechanism can drive the two movable parts to move to the appropriate positions respectively to realize three-gear switching. The structure is simple, compact and easy to operate.

[0016] A first protrusion is convexly provided on the inner peripheral wall of the inner hole of the second movable part, and a central angle groove is concavely provided on the driving shaft. The first protrusion is located in the central angle groove, and the groove wall of the central angle groove and the first protrusion can abut and cooperate to form a transmission structure. The structure is simple and compact, and the transmission is stable and reliable.

[0017] A supporting protrusion is convexly provided on one of the groove walls of the central angle groove, and the supporting protrusion and the first protrusion can cooperate with each other to form the above-mentioned transmission structure, which ensures stable and reliable transmission and reduces the transmission driving force.

[0018] A reinforcing rib is protruded from the middle of the bottom of the central angle groove, and the end face of the reinforcing rib is set as an outer arc surface, and the end face of the first protrusion is set as an inner arc surface. The outer arc surface and the inner arc surface are adapted to each other, which on the one hand enhances the strength of the drive shaft, and on the other hand realizes guidance and improves the rotation stability and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] Figure 1 It is a three-dimensional schematic diagram of a massage pool air path device according to a specific embodiment.

[0021] Figure 2 It is a schematic exploded perspective view of a massage pool air path device according to a specific embodiment.

[0022] Figure 3 It is one of the three-dimensional cross-sectional views of the massage pool air path device according to a specific embodiment.

[0023] Figure 4 This is the second three-dimensional cross-sectional view of the massage pool air path device according to the specific embodiment.

[0024] Figure 5 This is the third three-dimensional cross-sectional view of the massage pool air path device of the specific embodiment, which is in a bubbling state.

[0025] Figure 6 This is the fourth three-dimensional cross-sectional view of the massage pool air path device of the specific embodiment, which is in a bubbling state.

[0026] Figure 7 This is the third three-dimensional cross-sectional view of the massage pool air path device of the specific embodiment, which is in the exhaust state.

[0027] Figure 8 This is the fourth three-dimensional cross-sectional view of the massage pool air path device of the specific embodiment, which is in the exhaust state.

[0028] Figure 9 This is the third three-dimensional cross-sectional view of the air path device of the massage pool according to the specific embodiment, which is in the inflated state.

[0029] Figure 10 This is the fourth three-dimensional cross-sectional view of the air path device of the massage pool according to the specific embodiment, which is in the inflated state.

[0030] Figure 11 It is a schematic exploded perspective view of a control device according to a specific embodiment.

[0031] Figure 12It is a three-dimensional cross-sectional schematic diagram of a control device according to a specific embodiment.

[0032] Figure 13 is a schematic cross-sectional view of a control device according to a specific embodiment, in a bubbling state.

[0033] Figure 14 is a schematic top view of a control device according to a specific embodiment, in a bubbling state.

[0034] Figure 15 is a perspective schematic diagram of a control device according to a specific embodiment, in a bubbling state.

[0035] Figure 16 is a schematic cross-sectional view of a control device according to a specific embodiment, in an exhaust state.

[0036] Figure 17 is a schematic top view of a control device according to a specific embodiment, in an exhaust state.

[0037] Figure 18 It is a perspective schematic diagram of a control device according to a specific embodiment, in an exhaust state.

[0038] Figure 19 It is a cross-sectional schematic diagram of a control device according to a specific embodiment, in an inflated state.

[0039] Figure 20 It is a top view schematic diagram of the control device of a specific embodiment, in the inflated state.

[0040] Figure 21 It is a three-dimensional schematic diagram of a control device according to a specific embodiment, in an inflated state.

[0041] Description of labels:

[0042] Air pump 1, pipeline 2, control mechanism 3;

[0043] Air receiving portion 21, first air receiving path 211, second air receiving path 212, inner chamber 22, outer chamber 23, communication port 231, outer port 232;

[0044] Sealing plate 24, external through hole 241, air connection section 25, connecting section 26, middle section 27, peripheral wall 271, cover plate 272, first connecting seat 251, second connecting seat 261, through hole 262, one-way valve 263, control valve 28;

[0045] Operating member 31, ventilation path 32, reversing plate 33, first elastic body 331, first protrusion 332, second protrusion 333, reversing valve core group 34, valve core plate 341, air barrier plate 342, first inner through hole 343, second inner through hole 344, second elastic body 345, top support protrusion 346, drive shaft 35, central angle groove 351, top support protrusion 352, and reinforcing rib 353. DETAILED DESCRIPTION

[0046] Please refer to Figures 1 to 21, a massage pool air path device includes an air pump 1, an air path unit and an operating member 31; the air path unit includes a pipeline 2 and a control mechanism 3, the pipeline 2 is formed with an air receiving portion 21, the air receiving portion 21 has a first air receiving path 211 and a second air receiving path 212, the control mechanism 3 is connected to the pipeline 2 and the air path unit is formed with an inner chamber 22 and an outer chamber 23, the outer chamber 23 is provided with a connecting port 231 and an external opening 232 that can be connected to the outside world, the air pump 1 is mounted on the pipeline 2 and is provided between the connecting port 231 and the inner chamber 22, and an air path 32 is provided in the control mechanism 3; the control mechanism 3 includes a reversing plate 33, a reversing valve core group 34 and a drive shaft 35; the reversing plate 33 is provided in the outer chamber 23 The outer chamber can be divided into an independent first air chamber and a second air chamber by the reversing piece 33. The reversing piece 33 can rotate between a communicating position and an isolated position relative to the pipeline 2. When the reversing piece 33 is in the communicating position, the first air chamber is connected to the communicating port 231 and the external port 232, that is, the communicating port 231 and the external port 232 are communicated through the first air chamber. When the reversing piece 33 is in the isolated position, the communicating port 231 and the external port 232 are respectively located in the two air chambers to achieve phase isolation through the reversing piece 33. The reversing valve core group 34 can rotate between a first air intake position, an exhaust position and a second air intake position relative to the pipeline 2. The operating member 31 is transmission-connected to the drive shaft 35 to drive the drive shaft 35 to rotate to the positions corresponding to the first air intake state (towards the water) and the second air intake state. The three positions of the reversing plate 33 and the reversing valve core group 34 are: blowing air into the pool to achieve massage, such as a bubbling state), an exhaust state (the air cavity of the pool is exhausted outwards, i.e., an exhaust state) and a second air intake state (inflating the air cavity of the pool, i.e., an inflating state). The drive shaft 35 is transmission-connected to the reversing plate 33 and the reversing valve core group 34 and drives the reversing plate 33 to rotate between the communicating position and the isolating position through the rotation of the drive shaft 35, and drives the reversing valve core group 34 to rotate between the first air intake position, the exhaust position and the second air intake position, and the first air intake position is located between the exhaust position and the second air intake position; wherein: in the first air intake state, the reversing plate 33 is rotated to the communicating position and the reversing valve core group 34 is rotated to the first air intake position, and the external port 232 and the communicating port 231 are connected by the first When the air chamber is connected and the inner chamber 22 is connected to the first air connection path 211, the outside air passes through the external port 232, the first air chamber, the connecting port 231, the air pump 1, the inner chamber 22 and the first air connection path 211 in sequence to inflate the first air connection path and realize a bubbling state; in the exhaust state, the reversing piece 33 is turned to the isolation position and the reversing valve core group 34 is turned to the exhaust position, the connecting port 231 and the second air connection path 212 are connected through the second air chamber of the outer chamber 23, and the external port 232 and the inner chamber 22 are connected through the first air chamber of the outer chamber 23, then the gas in the air cavity of the pool passes through the second air connection path 212, the second air chamber, the connecting port 231, the air pump 1, the inner chamber 22, the first air chamber, and the external port 232 in sequence to be exhausted to the outside;In the second air intake state, the reversing plate 33 rotates to the communicating position and the reversing valve core assembly 34 rotates to the second air intake position. The external port 232 and the connecting port 231 are connected through the first air chamber, and the vent 32 connects to the inner chamber 22 and the second air connection path 212. External air then flows sequentially through the external port 232, the first air chamber, the connecting port 231, the air pump 1, the inner chamber 22, the second internal through hole, the vent 32, the first internal through hole, and the second air connection path 212 to inflate the second air connection path. The reversing plate 33, the reversing valve core assembly 34, and the drive shaft 35 cooperate to form a transmission mechanism. The reversing valve core assembly 34 is the first movable part, and the reversing plate 33 is the second movable part.

[0047] A first elastic body 331 and a limiting structure are provided between the commutator segment 33 and the sealing plate 24 of the pipeline 2. The first elastic body 331 is a torsion spring and connects the commutator segment 33 and the sealing plate 24. The limiting structure includes a second protrusion 333 protruding from the sealing plate 24. The commutator segment 33 can press against the second protrusion 333 to achieve limiting (this position is the communicating position) and can be reset to or maintained in the communicating position under the elastic force of the first elastic body 331. The commutator segment 33 is provided to be sleeved on the drive shaft 35. The inner hole is sleeved around the drive shaft 35, and a transmission structure is provided between the commutator segment 33 and the drive shaft 35. The drive shaft 35 drives the commutator segment 33 to the isolation position via the transmission structure. Specifically, the inner circumferential wall of the inner hole of the commutator segment 33 is provided with a first protrusion 332, and the drive shaft 35 is provided with a central angle groove 351. The first protrusion 332 is located within the central angle groove 351, and the groove wall of the central angle groove 351 and the first protrusion 332 can abut and cooperate with each other to form the transmission structure. The drive shaft 35 and the reversing valve core assembly 34 are synchronously rotatably connected, so that when the drive shaft 35 rotates to three positions, it drives the reversing valve core assembly 34 to rotate to a first intake position, an exhaust position, and a second intake position, respectively. The outer end of the drive shaft 35 is sealed and rotatably extends outside the outer chamber 23, and the operating member 31 is fixedly connected to the extended outer end of the drive shaft 35. Among them: when the operating member 31 is in the middle position, the reversing piece 33 is kept in the communicating position under the action of the first elastic body 331 and the limiting structure, and the reversing valve core group 34 is in the first air intake position, and is now in the first air intake state (bubbling state); the operating member 31 rotates clockwise, driving the driving shaft 35 to rotate clockwise. When it rotates to a predetermined angle (smaller than the central angle of the first air intake position and the exhaust position), the groove wall of the central angle groove 351 hits the first protrusion 332, and continues to rotate clockwise to drive the reversing piece 33 and the reversing valve core group 34 to rotate clockwise together until the reversing valve core group 34 is in the exhaust position and the reversing The plate 33 is in the isolation position, which is in the exhaust state, and can be maintained in this state under the manual action of the user or a positioning mechanism is set between the drive shaft and the pipeline to maintain it in this state. After that, the user rotates counterclockwise to drive the drive shaft 35 back to the middle position, and the reversing plate is reset to the connected position under the action of the first elastic body; the operating member 31 rotates counterclockwise, driving the drive shaft 35 to rotate counterclockwise to drive the reversing valve core group 34 to rotate to the second air intake position. During the counterclockwise rotation, the central angle groove rotates relative to the first protrusion, so that the reversing plate 34 is stationary and maintained in the connected position under the action of the first elastic body, and is now in the second air intake state. As needed, one of the groove walls of the central angle groove 351 is provided with a push-butt protrusion 352, and the push-butt protrusion and the first protrusion can cooperate with each other to form the above-mentioned transmission structure; the middle part of the groove bottom of the central angle groove 351 is provided with a reinforcing rib 353, and the end face of the reinforcing rib is set as an outer arc surface, and the end face of the first protrusion is set as an inner arc surface. The outer arc surface and the inner arc surface are adapted to each other, on the one hand to enhance strength, and on the other hand to provide a guiding effect.

[0048] The pipeline 2 is fixed with a sealing plate 24 and the outer chamber 23 and the inner chamber 22 are separated by the sealing plate 24, and two outer through holes 241 are provided on the sealing plate 24; the reversing valve core group 34 includes a valve core plate 341 and an air separation plate 342 fixed under the valve core plate 341, and the valve core plate 341 is provided with two first inner through holes 343 and a second inner through hole 344. The valve core plate 341 is located under the sealing plate 24 and the air passage 32 formed between the sealing plate 24 and the valve core plate 341 connects the second inner through hole 344 and a first inner through hole, and the second inner through hole is formed by a recess on the inner hole wall of the valve core plate 341; the two outer through holes 241 and the two first inner through holes 343 cooperate and are aligned and connected when in the exhaust position or staggered and closed when in the first and second intake positions through the rotation control of the reversing valve core group 34; the inner chamber 22 and the air separation plate 342 When the reversing valve core group 34 is in the first air intake position, the inner chamber 22 and the first air connection path 211 are connected; when they are in the second air intake position and the exhaust position, the inner chamber 22 and the first air connection path 211 are isolated by the air partition plate 342; the second air connection path 212, a first inner through hole 343, an outer through hole 241 (a first inner through hole 343 and an outer through hole 241 are aligned), the second air chamber and the connecting port 231 are connected in sequence and the inner chamber 22, another first inner through hole 343, another outer through hole 241 (another first inner through hole 343 and another outer through hole 241 are aligned), the first air chamber and the outer port 232 are connected in sequence; the air path 32 at the second air intake position is connected to the inner chamber 22 and the second air connection path 212 respectively through the second inner through hole 344 and the two first inner through holes 343. In the specific structure: the valve core plate 341 and the sealing plate 24 face each other, and the valve core plate 341 is provided with a groove on the end surface thereof. The second inner through hole 344 is provided at the bottom of the groove. Since the sealing plate 24 and the valve core plate 341 are sealed and abutted, a connecting cavity is formed at the groove between the sealing plate and the valve core plate. The connecting cavity constitutes the air passage 32. When the valve core plate 341 is in the second air intake state, the upper ends of the two first inner through holes 343 and the sealing plate are spaced apart (specifically, a gap groove is provided on the bottom surface of the sealing plate, and the gap groove allows the first inner through hole 343 to be provided when the valve core plate 341 is in the second air intake state). The upper port of the hole is connected to the communication cavity, and both first inner through holes 343 are connected to the communication cavity. A C-shaped groove body 3431 is further provided in the inner cavity. The lower port of the first inner through hole at the second air inlet position is connected to the upper port of the groove body. The air inlet of the second air connection path 212 is connected to the groove body, and air enters the air inlet through the groove body. When the reversing valve core assembly 34 is in the first and second air inlet positions, the valve core plate 341 abuts against the end surface and seals with the outer through hole 241. The drive shaft 35 passes through the sealing plate 24 and is fixed to the valve core plate 341. The sealing plate constitutes a fixed plate.

[0049] The pipeline 2 has an air connecting section 25, a connecting section 26 and an intermediate section 27 arranged between the air connecting section 25 and the connecting section 26; the air connecting section 25 has a tube-in-tube structure and the inner tube constitutes the second air connecting path 212 and the gap between the inner and outer tubes constitutes the first air connecting path 211; the upper edge of the intermediate section 27 extends upward to form a peripheral wall 271, and a cover plate 272 is fixedly installed on the upper end of the peripheral wall 271. The sealing plate 24 is fixed in the peripheral wall 271 and the peripheral wall 271 and the sealing plate 24 and the cover plate 272 constitute the outer chamber 23, and the inner chamber 22 is formed in the intermediate section 27 and under the sealing plate 24. The peripheral wall 271 is provided with the connecting port 231 and the outer port 232. The connecting section 26 is connected to the connecting port 231 and the air pump 1 is arranged in the connecting section 26. Furthermore, the air connecting section 25 is fixedly provided with a first connecting seat 251 protruding into the middle section 27, and the upper end face of the first connecting seat 251 is provided with an air connecting port connected to the second air connecting path 212 of the inner tube, and the first connecting seat 251 seals the upper and middle part of the gap between the inner and outer tubes, and the above-mentioned groove body 3431 is provided on the upper end face of the first connecting seat 251; the connecting section 26 is fixedly provided with a second connecting seat 261 protruding into the middle section 27, and the second connecting seat 261 is provided with a through hole 262 running through the upper and lower parts, and the inner chamber 22 connects the lower part of the gap between the inner and outer tubes and the connecting section 26; the valve core plate 341 is abutted against the first connecting seat 251 and the second connecting seat 261, and the through hole 262 can cooperate with the first inner through hole (aligned and connected when in the exhaust state, and sealed and staggered in the first and second intake states), and the air connecting port can cooperate with the first inner through hole; the outer end of the drive shaft is sealed and extends out of the cover plate 272, and the operating member is fixed to the outer end extending out of the drive shaft. A one-way valve 263 is provided between the air pump and the inner chamber of the connecting section 26. In the specific structure, the first connecting seat and the second connecting seat are connected together and provided with the above-mentioned groove body.

[0050] The first connecting seat 251 has a recessed air inlet with a control valve 28. This control valve 28 can switch between a one-way state and an open state. A downwardly extending portion around a first inner through hole of the valve core plate 341 forms a support protrusion 346, so that the bottom surface of the valve core plate 341 includes the support protrusion 346 and the remaining area. The bottom surface of the valve core plate 341 cooperates with the control valve 28, and the support protrusion 346 compresses the control valve 28, thereby switching it to an open state or a one-way state. When the reversing valve core assembly 34 is in the exhaust position, the support protrusion 346 compresses the control valve 28, causing the control valve 28 to be in the open state, and gas in the air cavity is exhausted to the outside through the control valve, the first inner through hole, etc. When in the first and second air intake positions, the remaining area cooperates with the control valve 28, causing the control valve 28 to be in a one-way state (a one-way valve). In the second air intake position, outside air enters the air inlet through the second inner through hole, and the control valve is opened in a one-way manner to inflate the second air inlet. The control valve 28 includes a plug that can be movably connected up and down in the air inlet and a third elastic body provided in the air inlet. The third elastic body pushes against the plug from the inside to the outside. The plug can move between an open position and a closed position relative to the air inlet. The plug pushes against the bottom surface of the valve core plate. When the push-button convex seat 346 cooperates with the control valve, the push-button convex seat can push against the plug to put it in the open position. When the rest of the area cooperates with the control valve 28 and is in the second air inlet position, the outside air drives the plug to slide downward to the open position through the first internal through hole so that the outside air can pass through the control valve to pump air into the second air inlet. When there is no outside air or the outside air pressure is low, the control valve is in the closed position. The above structure can meet the requirements that the control valve is in the open state when in the exhaust state and is in the one-way valve state in other states (including the inflation state), thereby improving the inflation and exhaust performance.

[0051] A second elastic body 345 is provided between the air-isolating plate 342 and the middle section 27. The second elastic body 345 is sleeved on the air-isolating plate 342 and presses against the bottom of the inner cavity of the middle section 27 and the flange protruding on the air-isolating plate 342. Firstly, it can make the valve core plate seal against the sealing plate to enhance the sealing performance. Secondly, when the operating part is rotated, the reversing valve core group can be moved downward by pressing the operating part to reduce the friction between the valve core plate and the sealing plate. Thirdly, it can increase the operating feel.

[0052] The massage pool includes a pool body and a massage pool air path device; the pool body is surrounded by a pool cavity, and the pool body is provided with a first air inlet connected to the pool cavity; an air cavity is formed in the pool body and a second air inlet connected to the air cavity; the first air inlet and the second air inlet are respectively connected to the first air inlet and the second air inlet.

[0053] Another embodiment differs from the previous embodiment in that a control valve 28 is provided at the recessed air inlet of the first connecting seat 251. The control valve 28 can switch between a one-way state and an open state. The two first inner through-holes of the valve core plate 341 are both extended downwardly to form abutment protrusions 346 around their respective bottom surfaces, so that the valve core plate 341 has two abutment protrusions 346 and a remaining area. The bottom surface of the valve core plate 341 cooperates with the control valve 28, and the abutment protrusions 346 press against the control valve 28 to adjust the valve to an open state or a one-way state. When the reversing valve core assembly 34 is in the exhaust position or the second intake position, the abutment protrusions 346 press against the control valve 28, causing the control valve 28 to be in the open state. When the reversing valve core assembly 34 is in the first intake position, the abutment protrusions 346 press against the control valve 28, causing the control valve 28 to be in the first intake position. When the reversing valve core assembly 34 is in the first intake position, the remaining area cooperates with the control valve 28 to cause the control valve 28 to be in a one-way state (a one-way valve).

[0054] The above description is merely a preferred embodiment of the present invention and therefore cannot be used to limit the scope of the present invention. In other words, equivalent changes and modifications made according to the scope of the present invention and the contents of the specification should still fall within the scope of the present invention.

Claims

1. A transmission mechanism comprising a mounting base, a drive shaft, and a first movable member, wherein the drive shaft is rotatable relative to the mounting base, the first movable member and the drive shaft being rotatably mounted together, and the drive shaft being capable of driving the first movable member to rotate relative to the mounting base to two extreme positions and an intermediate position between the two extreme positions; characterized in that: The second movable member is a movable member that is sleeved on the outside of the drive shaft and can rotate to a first position and a second position relative to the mounting seat. An elastic body and a limiting structure are provided between the second movable member and the mounting seat, and the elastic body and the limiting structure cooperate to drive the second movable member to remain in or reset to the first position. A transmission structure is provided between the drive shaft and the second movable member, and the drive shaft rotates and drives the second movable member to rotate to the second position through the transmission structure. The second position corresponds to an extreme position. The second movable member is capable of being sleeved on the inner hole of the drive shaft and the inner peripheral wall of the inner hole A first protrusion is convexly provided, and a central angle groove is concavely provided on the drive shaft. The first protrusion is located in the central angle groove and the groove wall of the central angle groove and the first protrusion can abut and cooperate to form the above-mentioned transmission structure; the mounting seat includes a fixed plate, and the drive shaft can rotate through the fixed plate. The first movable part is fixed to the drive shaft and is located under the fixed plate, and the second movable part is located above the fixed plate. The elastic body includes a torsion spring, which connects the fixed plate and the second movable part. A second protrusion is convexly provided on the fixed plate, and the second movable part can abut against the second protrusion to form the above-mentioned limiting structure.

2. The transmission mechanism according to claim 1, wherein: The central angle between the first position and the second position is not greater than the central angle between the middle position and an extreme position corresponding to the second position.

3. The transmission mechanism according to claim 2, wherein: The central angle of the central angle groove is smaller than the central angles of the two extreme positions and is not smaller than the central angle between the middle position and an extreme position corresponding to the second position.

4. The transmission mechanism according to claim 1, wherein: A supporting protrusion is convexly provided on one groove wall of the central angle groove, and the supporting protrusion and the first protrusion can cooperate with each other to form the above-mentioned transmission structure.

5. The transmission mechanism according to any one of claims 1 to 4, characterized in that: A reinforcing rib is convexly provided at the middle of the bottom of the central angle groove, the end face of the reinforcing rib is set as an outer arc surface, the end face of the first protrusion is set as an inner arc surface, and the outer arc surface and the inner arc surface are adapted to each other.

6. A transmission mechanism comprising a mounting base, a drive shaft, and a first movable member, the drive shaft being rotatable relative to the mounting base, the first movable member and the drive shaft being rotatably coupled together, and the drive shaft being capable of driving the first movable member to rotate relative to the mounting base to two extreme positions and an intermediate position between the two extreme positions; characterized in that: The second movable member is a movable member that is sleeved on the outside of the drive shaft and can rotate to a first position and a second position relative to the mounting seat. An elastic body and a limiting structure are provided between the second movable member and the mounting seat, and the elastic body and the limiting structure cooperate to drive the second movable member to remain in or reset to the first position. A transmission structure is provided between the drive shaft and the second movable member, and the drive shaft rotates and drives the second movable member to rotate to the second position through the transmission structure. The second position corresponds to an extreme position. The second movable member is capable of being sleeved on the inner hole of the drive shaft and the inner peripheral wall of the inner hole A central angle groove is recessed, and a first protrusion is convexly provided on the drive shaft. The first protrusion is located in the central angle groove, and the groove wall of the central angle groove and the first protrusion can abut and cooperate to form the above-mentioned transmission structure; the mounting seat includes a fixed plate, and the drive shaft can rotate through the fixed plate. The first movable part is fixed to the drive shaft and is located under the fixed plate, and the second movable part is located above the fixed plate. The elastic body includes a torsion spring, which connects the fixed plate and the second movable part. A second protrusion is convexly provided on the fixed plate, and the second movable part can abut against the second protrusion to form the above-mentioned limiting structure.

7. Driving mechanism, characterized in that: It comprises an operating member and the transmission mechanism according to claim 1, wherein the operating member and the drive shaft are fixed together.

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