A drain valve and its switching assembly

Abstract

This invention discloses a drain valve and its switching assembly. The switching assembly includes: a knob body with a hollow inner cavity; a knob rotatably mounted on the knob body; a push rod reciprocatingly mounted on the knob body; and a transmission mechanism located in the hollow inner cavity. The knob, through the transmission mechanism, links the push rod to control the push rod to extend outward relative to the knob body. This invention uses a knob-controlled switching assembly, filling the technological gap in the prior art where there is no rotary switching assembly. The novel operation method can meet the diverse needs of some users.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bathroom, in particular to a switch assembly of a drain valve and a drain valve with the switch assembly. BACKGROUND

[0002] The switch assembly of the existing drain valve for the toilet tank adopts manual switch or electric control switch. The manual switch mostly adopts key or wrench. When the key is adopted, full discharge key and half discharge key are usually provided to control different discharge amount. The electric control switch adopts induction type or touch type. SUMMARY

[0003] One of the purposes of the present application is to provide a switch assembly of a drain valve with different operation mode, which adopts knob structure, and the switch assembly is operated by rotation to achieve the opening purpose of the drain valve.

[0004] The second purpose of the present application is to provide a drain valve with switch assembly of different operation mode.

[0005] In order to achieve the above purpose, according to one aspect of the present application, the technical scheme of the present application is as follows:

[0006] A switch assembly of a drain valve, comprising:

[0007] A knob body provided with a hollow inner cavity;

[0008] A knob rotatably arranged on the knob body;

[0009] A top rod movably arranged on the knob body;

[0010] A transmission mechanism arranged in the hollow inner cavity, the knob drives the top rod through the transmission mechanism to control the outward extension of the top rod relative to the knob body.

[0011] Preferably, the top rod is movably arranged on the knob body; and further comprising an elastic reset member, the knob, the transmission mechanism and the top rod are automatically reset under the action of the elastic reset member.

[0012] Preferably, the elastic reset member is arranged between the knob body and the top rod; and / or, the elastic reset member is arranged between the knob body and the knob; and / or, the elastic reset member is arranged between the knob body and the transmission mechanism; and / or, the elastic reset member is arranged in the transmission mechanism.

[0013] Preferably, the transmission mechanism comprises any one or combination of gear transmission mechanism, cam transmission mechanism and belt transmission mechanism.

[0014] Preferably, the transmission mechanism comprises a helical gear pair, a transmission shaft rotatably arranged on the knob body, and a transmission wheel arranged on the transmission shaft, the helical gear pair comprises a first helical gear arranged on the inner end of the knob and a second helical gear coaxially arranged on the transmission shaft, rotating the knob drives the transmission shaft to rotate through the helical gear pair, and the transmission shaft in turn drives the top rod to extend outwards relative to the knob body through the transmission wheel.

[0015] Preferably, the transmission wheel is a gear, and the transmission mechanism further comprises a rack slidingly arranged on the knob body and linked with the top rod; or, the transmission wheel is a worm wheel, and the transmission mechanism further comprises a worm slidingly arranged on the knob body and linked with the top rod; or, the transmission wheel is a cam.

[0016] Preferably, the transmission wheel is fixed on the transmission shaft to rotate with the transmission shaft, or the transmission shaft is provided with an abutting block, and the transmission wheel is provided with a matching block, and the transmission shaft drives the transmission wheel to rotate through the abutting cooperation between the abutting block and the matching block.

[0017] Preferably, the top rod comprises a full-row top rod and a half-row top rod, correspondingly, the transmission shaft comprises a full-row transmission shaft and a half-row transmission shaft rotatably arranged on the knob body independently of each other, the second helical gear is provided with two and coaxially arranged on the full-row transmission shaft and the half-row transmission shaft respectively, and the transmission wheel comprises a full-row transmission wheel arranged on the full-row transmission shaft and a half-row transmission wheel arranged on the half-row transmission shaft; the first helical gear has half a circle of teeth, when the knob is rotated in a forward direction, the first helical gear meshes with the second helical gear on the full-row transmission shaft to drive the full-row transmission shaft to rotate, and the full-row transmission shaft in turn drives the full-row top rod to extend outwards relative to the knob body through the full-row transmission wheel; when the knob is rotated in a reverse direction, the first helical gear meshes with the second helical gear on the half-row transmission shaft to drive the half-row transmission shaft to rotate, and the half-row transmission shaft in turn drives the half-row top rod to extend outwards relative to the knob body through the half-row transmission wheel.

[0018] Preferably, the top rod comprises a full-row top rod and a half-row top rod, correspondingly, the transmission wheel comprises a full-row transmission wheel and a half-row transmission wheel, the full-row transmission wheel and the half-row transmission wheel are rotatably arranged on the same transmission shaft, the transmission shaft is provided with a full-row abutting block and a half-row abutting block, the full-row transmission wheel is provided with a full-row matching block, and the half-row transmission wheel is provided with a half-row matching block, when the transmission shaft is rotated in a forward direction, the full-row abutting block abuts against the full-row matching block to drive the full-row transmission wheel to rotate; when the transmission shaft is rotated in a reverse direction, the half-row abutting block abuts against the half-row matching block to drive the half-row transmission wheel to rotate.

[0019] Preferably, when the drive shaft rotates forward, the half-row abutment block separates from the half-row mating block; when the drive shaft rotates in reverse, the full-row abutment block separates from the full-row mating block. The system also includes a full-row torsion spring and a half-row torsion spring. One end of the full-row torsion spring is connected to the full-row abutment block, and the other end is connected to the full-row mating block, so as to apply an elastic force in the abutment direction to the full-row abutment block and the full-row mating block. When the full-row abutment block separates from the full-row mating block, the full-row torsion spring undergoes elastic deformation. One end of the half-row torsion spring is connected to the half-row abutment block, and the other end is connected to the half-row mating block, so as to apply an elastic force in the abutment direction to the half-row abutment block and the half-row mating block. When the half-row abutment block separates from the half-row mating block, the half-row torsion spring undergoes elastic deformation.

[0020] Preferably, the full-row top rod and the half-row top rod are respectively provided with a second limiting part that cooperates with the first limiting part on the knob body;

[0021] When the drive shaft rotates forward, the second limiting part on the half-row push rod engages with the first limiting part to restrict the half-row push rod from sliding in a direction opposite to the extension direction of the half-row push rod, thereby causing the half-row abutting block to separate from the half-row mating block;

[0022] When the drive shaft reverses, the second limiting part on the full-row push rod engages with the first limiting part to restrict the full-row push rod from sliding in a direction opposite to the extension direction of the full-row push rod, thereby causing the full-row abutment block to separate from the full-row mating block.

[0023] Preferably, the push rod includes a full-row push rod and a half-row push rod. When the knob is rotated in the forward direction, the full-row push rod extends outward relative to the knob body in conjunction with the knob. When the knob is rotated in the reverse direction, the half-row push rod extends outward relative to the knob body in conjunction with the knob. Alternatively, when the knob is rotated in the first direction to a first angle, the full-row push rod extends outward relative to the knob body in conjunction with the knob. When the knob is rotated in the first direction to a second angle, the half-row push rod extends outward relative to the knob body in conjunction with the knob.

[0024] Furthermore, according to another aspect of the present invention, the present invention also provides a drain valve, including a drain valve body and a drain valve switching assembly, the switching assembly driving the drain valve body to open for drainage, the switching assembly employing the drain valve switching assembly described in any of the preceding claims.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] 1. This invention uses a knob-controlled switch assembly, filling the technological gap in the prior art where there is no rotary switch assembly. The operation method is novel and can meet the diverse needs of some users.

[0027] 2. The transmission mechanism includes a helical gear transmission pair, a transmission shaft, and a transmission wheel. It has a simple and compact structure, reliable function, and ingenious design.

[0028] 3. A drive shaft is provided, on which there are full-row abutment blocks and half-row abutment blocks. When the drive shaft rotates forward, the full-row abutment blocks abut against the full-row mating blocks, thereby driving the full-row drive wheels to rotate. When the drive shaft rotates in reverse, the half-row abutment blocks abut against the half-row mating blocks, thereby driving the half-row drive wheels to rotate. This achieves independent control of the full-row and half-row. Because a single drive shaft is provided, the structure is simpler and more compact.

[0029] 4. Two independent drive shafts are set up. The first helical gear has a half-circle tooth. When the knob is turned clockwise, the first helical gear meshes with the second helical gear on the full-row drive shaft to drive the full-row drive shaft to rotate. When the knob is turned counterclockwise, the first helical gear meshes with the second helical gear on the half-row drive shaft to drive the half-row drive shaft to rotate. The structure is simple, the design is ingenious, and the function is reliable.

[0030] 5. The full-row push rod and the half-row push rod are respectively provided with a second limiting part that cooperates with the first limiting part on the knob body. This ensures that when the full-row push rod is driven to extend, the half-row push rod will not retract into the knob body, thereby separating the half-row abutment block from the half-row mating block. This causes the elastic reset member disposed between the half-row abutment block and the half-row mating block to undergo elastic deformation. When the applied external force is removed, the entire mechanism can be reset under the elastic force of the elastic reset member. Similarly, when the half-row push rod is driven to extend, the full-row push rod will not retract into the knob body, thereby separating the full-row abutment block from the full-row mating block. This causes the elastic reset member disposed between the full-row abutment block and the full-row mating block to undergo elastic deformation. When the applied external force is removed, the entire mechanism can be reset under the elastic force of the elastic reset member. Attached Figure Description

[0031] Figure 1 This is a three-dimensional assembly diagram of the switch assembly according to the first embodiment of the present invention;

[0032] Figure 2 An exploded perspective view of a switch assembly according to a first embodiment of the present invention;

[0033] Figure 3 One of the cross-sectional views of the switch assembly according to the first embodiment of the present invention;

[0034] Figure 4This is a second cross-sectional view of the switch assembly according to the first embodiment of the present invention;

[0035] Figure 5 One of the three-dimensional structural diagrams of the switch assembly according to the first embodiment of the present invention;

[0036] Figure 6 This is a second three-dimensional structural diagram of the internal structure of the switch assembly according to the first embodiment of the present invention;

[0037] Figure 7 This is the third three-dimensional structural diagram of the internal structure of the switch assembly according to the first embodiment of the present invention;

[0038] Figure 8 This is the fourth internal three-dimensional structural diagram of the switch assembly according to the first embodiment of the present invention;

[0039] Figure 9 This is a diagram showing the state of the switch assembly with all the push rods extended according to the first embodiment of the present invention;

[0040] Figure 10 This is a diagram showing the state of the half-row top rod of the switch assembly according to the first embodiment of the present invention.

[0041] Figure 11 An exploded perspective view of a switch assembly according to a second embodiment of the present invention;

[0042] Figure 12 This is one of the three-dimensional structural diagrams of the switch assembly according to a second embodiment of the present invention;

[0043] Figure 13 This is a perspective structural view of the first helical gear of the switching assembly according to a second embodiment of the present invention;

[0044] Figure 14 This is a second three-dimensional structural view of the internal structure of the switch assembly according to the second embodiment of the present invention (after cutting off a part of the knob body);

[0045] Figure 15 This is a cross-sectional view of a switch assembly according to a second embodiment of the present invention.

[0046] The reference numerals in the figure are explained as follows:

[0047] 10. Knob body; 11. Inner cavity; 12. First limiting part; 13. Full row sleeve; 14. Half row sleeve;

[0048] 20. Knob;

[0049] 30. Top rod; 30a. Full row top rod; 30b. Half row top rod; 31. Second limiting part;

[0050] 40. Elastic reset element; 41. Reset torsion spring; 42. Reset compression spring; 43. Knob reset torsion spring;

[0051] 50. Transmission mechanism; 51. Helical gear transmission pair; 511. First helical gear; 512. Second helical gear; 52. Transmission shaft; 52a. Full-row transmission shaft; 52b. Half-row transmission shaft; 521a. Full-row abutment block; 521b. Half-row abutment block; 53. Gear and rack transmission pair; 531a. Full-row gear; 532a. Full-row rack; 531b. Half-row gear; 532b. Half-row rack; 54a. Full-row mating block; 54b. Half-row mating block. Detailed Implementation

[0052] To more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be further described below with reference to the accompanying drawings. The drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0053] First embodiment (the transmission wheel is a gear, and there is one transmission shaft):

[0054] like Figures 1 to 10 As shown, a drain valve switching assembly according to a first embodiment of the present invention includes a knob body 10, a knob 20, a push rod 30, an elastic reset member 40, and a transmission mechanism 50. The knob body 10 has a hollow inner cavity 11; the knob 20 is rotatably mounted on the knob body 10; the push rod 30 is reciprocally mounted on the knob body 10; the transmission mechanism 50 is located in the hollow inner cavity 11. The knob 20, through the transmission mechanism 50, links the push rod 30 to control the push rod 30 to extend outward relative to the knob body 10. The extension of the push rod 30 actuates the drain valve's starting assembly (not shown) to drain water. The structure of the push rod 30 extending to drive the drain valve is known technology and will not be described further here.

[0055] The switch assembly of the present invention fills the technical gap in the prior art by using a knob-controlled switch assembly, which lacks a rotary switching mechanism. The novel operation method can meet the diverse needs of some users.

[0056] In this embodiment, the elastic reset member 40 enables the knob 20, transmission mechanism 50, and push rod 30 to automatically reset after the driving force is removed. The elastic reset member 40 can be positioned in various ways, specifically, it can be placed between the knob body 10 and the push rod 30; and / or, between the knob body 10 and the knob 20; and / or, between the knob body 10 and the transmission mechanism 50; and / or, within the transmission mechanism 50.

[0057] The transmission mechanism 50 can be implemented in various ways, such as it may include any one or a combination of gear transmission mechanism, cam transmission mechanism and belt transmission mechanism.

[0058] Specifically, in this embodiment, the push rod 30 is slidably mounted on the knob body 10, and the transmission mechanism 50 is a gear transmission mechanism. The gear transmission mechanism includes a helical gear transmission pair 51, a transmission shaft 52 rotatably mounted on the knob body 10, and a transmission wheel mounted on the transmission shaft. The transmission wheel is specifically a gear. The transmission mechanism 50 also includes a rack slidably mounted on the knob body 10 and engaging with the push rod 30. The gear and rack constitute a gear and rack transmission pair 53. The helical gear transmission pair 51 includes a first helical gear 511 mounted on the inner end of the knob 20 and a second helical gear 512 coaxially mounted on the transmission shaft 52. The gears of the gear and rack transmission pair 53 are coaxially mounted on the transmission shaft 52, and the rack of the gear and rack transmission pair 53 is fixedly connected to the push rod 30. When the knob 20 rotates, the helical gear transmission pair 51 drives the transmission shaft 52 to rotate, and the transmission shaft 52 then drives the push rod 30 to slide outward relative to the knob body 10 via the gear and rack transmission pair 53. In this embodiment, the rack and pinion 30 are integrally formed.

[0059] The transmission wheel can be fixed on the transmission shaft 52 to rotate with the transmission shaft 52, or the transmission shaft 52 is provided with an abutment block and the transmission wheel is provided with a mating block, and the transmission shaft 52 drives the transmission wheel to rotate through the abutment engagement between the abutment block and the mating block.

[0060] Specifically, the push rod 30 includes a full-row push rod 30a and a half-row push rod 30b. When the full-row push rod 30a extends, it controls the drain valve to drain the water completely; when the half-row push rod 30b extends, it controls the drain valve to drain the water partially. Correspondingly, the gear and rack transmission pair 53 has two sets: one set includes a full-row gear 531a and a full-row rack 532a, and the other set includes a half-row gear 531b and a half-row rack 532b. When the knob 20 rotates forward, it drives the transmission shaft 52 to rotate forward through the helical gear transmission pair 51. The transmission shaft 52 drives the full-row gear 531a to rotate, and the full-row gear 531a then drives the full-row rack 532a to slide. When the knob 20 rotates in reverse, it drives the transmission shaft 52 to rotate in reverse through the helical gear transmission pair 51. The transmission shaft 52 drives the half-row gear 531b to rotate, and the half-row gear 531b then drives the half-row rack 532b to slide.

[0061] like Figure 2 , Figure 3 and Figure 8As shown, in this embodiment, the elastic reset member 40 includes a reset torsion spring 41 and a knob reset torsion spring 43. The reset torsion spring 41 is disposed in the transmission mechanism 50. Specifically, one end of the reset torsion spring 41 is connected to a gear, and the other end is connected to a transmission shaft 52. The knob reset torsion spring 43 is connected between the knob 20 and the knob body 10. When the elastic force of the reset torsion spring 41 is sufficient, the knob reset torsion spring 43 can be omitted, resulting in a simpler structure and easier installation. Alternatively, when the elastic force of the knob reset torsion spring 43 is sufficient, the reset torsion spring 41 can also be omitted.

[0062] In this embodiment, a drive shaft 52 is provided, and a full-row gear 531a and a half-row gear 531b are rotatably mounted on the drive shaft 52. The first helical gear 511 has a full circle of teeth arranged circumferentially, and the full-row push rod 30a and the half-row push rod 30b are arranged opposite to each other. Since there is only one drive shaft 52, in order to avoid both the full-row gear 531a and the half-row gear 531b driving the corresponding push rod 30 to extend out of the knob body 10 when the drive shaft 52 rotates, this embodiment adopts the following structure: the drive shaft 52 is provided with a full-row abutment block 521a and a half-row abutment block 521b, the full-row gear 531a is provided with a full-row mating block 54a that abuts and engages with the full-row abutment block 521a, and the half-row gear 531b is provided with a half-row mating block 54b that abuts and engages with the half-row abutment block 521b; the drive shaft 52 When rotating forward, the full-row abutment block 521a abuts against the full-row mating block 54a, thereby driving the full-row gear 531a; when the drive shaft 52 rotates in reverse, the half-row abutment block 521b abuts against the half-row mating block 54b, thereby driving the half-row gear 531b. This achieves the following: when the drive shaft 52 rotates in one direction, it only drives one of the full-row gear 531a and the half-row gear 531b to rotate; when the drive shaft 52 rotates in the other direction, it only drives the other of the full-row gear 531a and the half-row gear 531b to rotate. The structure is simple and the function is reliable.

[0063] A further optimized design is as follows: When the drive shaft 52 rotates forward, the full-row abutment block 521a abuts against the full-row mating block 54a, thereby driving the full-row gear 531a, while the half-row abutment block 521b separates from the half-row mating block 54b; when the drive shaft 52 rotates in reverse, the half-row abutment block 521b abuts against the half-row mating block 54b, thereby driving the half-row gear 531b, while the full-row abutment block 521a separates from the full-row mating block 54a. The reset torsion spring 41 includes a full-row torsion spring and a half-row torsion spring. One end of the full-row torsion spring is connected to the full-row abutment block 521a, and the other end is connected to the full-row mating block 54a, so as to apply an elastic force in the abutting direction to the full-row abutment block 521a and the full-row mating block 54a. When the full-row abutment block 521a separates from the full-row mating block 54a, the full-row torsion spring undergoes elastic deformation, thereby providing a reset elastic force for the reset of the transmission structure 50, which in turn can drive the knob 20 and the top. The rod 30 is reset together; one end of the half-row torsion spring is connected to the half-row abutment block 521b, and the other end is connected to the half-row mating block 54b, so as to apply an elastic force in the abutment direction to the half-row abutment block 521b and the half-row mating block 54b. When the half-row abutment block 521b and the half-row mating block 54b separate, the half-row torsion spring is elastically deformed, thereby providing a reset elastic force for the reset of the transmission structure 50, which in turn can drive the knob 20 and the push rod 30 to reset together.

[0064] To ensure that when the drive shaft 52 rotates in one direction, only one of the full-row gear 531a and the half-row gear 531b rotates, while the other remains stationary, this embodiment employs second limiting portions 31 on the full-row push rod 30a and the half-row push rod 30b, respectively, which engage with the first limiting portion 12 on the knob body 10. When the drive shaft 52 rotates forward, the second limiting portion 31 on the half-row push rod 30b engages with the first limiting portion 12 to restrict the half-row push rod 30b from sliding in the opposite direction to its extension direction, thereby separating the half-row abutting block 521b from the half-row mating block 54b. When the drive shaft 52 rotates in reverse, the second limiting portion 31 on the full-row push rod 30a engages with the first limiting portion 12 to restrict the full-row push rod 30a from sliding in the opposite direction to its extension direction, thereby separating the full-row abutting block 521a from the full-row mating block 54a. Specifically, the knob body 10 is provided with a full-row sleeve 13 and a half-row sleeve 14. The full-row push rod 30a is slidably sleeved in the full-row sleeve 13, and the half-row push rod 30b is slidably sleeved in the half-row sleeve 14. The outer edges of the full-row sleeve 13 and the half-row sleeve 14 form a first limiting part 12. The second limiting part 31 is an annular protrusion on the outer peripheral wall of the full-row push rod 30a and the half-row push rod 30b.

[0065] In other embodiments, the first limiting part 12 and the second limiting part 31 may not be provided. That is, when the drive shaft 52 rotates forward, the full-row abutment block 521a abuts against the full-row mating block 54a, thereby driving the full-row gear 531a. The half-row abutment block 521b and the half-row mating block 54b can remain in abutment without separating under the action of the half-row torsion spring connecting the two. At this time, the half-row push rod 30b will move along the extension direction of the half-row push rod 30b under the action of the half-row gear 531b and the half-row rack 532b. When the drive shaft 52 reverses direction, the half-row abutment block 521b abuts against the half-row mating block 54b, thereby driving the half-row gear 531b. The full-row abutment block 521a and the full-row mating block 54a can remain in contact without separating under the action of the full-row torsion spring connecting them. At this time, the full-row push rod 30a will slide in the opposite direction to the extension direction of the full-row push rod 30a under the action of the full-row gear 531a and the full-row rack 532a to retract into the knob body 10. Therefore, with this design, when one of the full-row push rod 30a and the half-row push rod 30b extends out of the knob body 10, the other one retracts into the knob body 10, requiring a large internal space for the knob body 10.

[0066] like Figure 9 As shown, when the knob 20 is rotated in the forward direction, the knob 20 drives the first helical gear 511 on the knob 20 to rotate in the forward direction. The first helical gear 511 meshes with the second helical gear 512 on the transmission shaft 52, thereby driving the transmission shaft 52 to rotate in the forward direction. When the transmission shaft 52 rotates in the forward direction, the full-row abutment block 521a abuts against the full-row mating block 54a, thereby driving the full-row gear 531a to rotate. Since the second limiting part on the half-row push rod 30b is limited and engaged with the first limiting part 12 on the knob body 10, the half-row abutment block 521b and the half-row mating block 54b are separated, thereby causing the half-row torsion spring to undergo elastic deformation. The rotation of the full-row gear 531a drives the full-row rack 532a to slide. The full-row rack 532a further drives the full-row push rod 30a, causing the full-row push rod 30a to extend relative to the knob body 10, thereby driving the drain valve to drain completely. When the external force applied to knob 20 is removed, the half-row torsion spring elastically resets, causing drive shaft 52 to reverse and reset. Drive shaft 52 drives the second helical gear 512 to rotate, which in turn drives knob 20 to reset. At the same time, knob 20 is also reset under the elastic force of knob reset torsion spring 43. After drive shaft 52 resets, under the action of full-row torsion spring, full-row gear 531a also resets, and subsequently full-row rack 532a and full-row push rod 30a also reset.

[0067] like Figure 10As shown, when the knob 20 is rotated in the reverse direction, the knob 20 drives the first helical gear 511 on the knob 20 to rotate in the reverse direction. The first helical gear 511 meshes with the second helical gear 512 on the transmission shaft 52, thereby driving the transmission shaft 52 to rotate in the reverse direction. When the transmission shaft 52 rotates in the reverse direction, the half-row abutment block 521b abuts against the half-row mating block 54b, thereby driving the half-row gear 531b to rotate. Since the second limiting part on the full-row push rod 30a is limited and engaged with the first limiting part 12 on the knob body 10, the full-row abutment block 521a and the full-row mating block 54a are separated, and the full-row torsion spring undergoes elastic deformation. The rotation of the half-row gear 531b drives the half-row rack 532b to slide. The half-row rack 532b further drives the half-row push rod 30b, causing the half-row push rod 30b to extend relative to the knob body 10, thereby driving the drain valve to partially drain. When the external force applied to knob 20 is removed, the full row of torsion springs elastically resets, causing drive shaft 52 to rotate clockwise and reset. Drive shaft 52 drives the second helical gear 512 to rotate, which in turn drives knob 20 to reset. At the same time, knob 20 is also reset under the elastic force of knob reset torsion spring 43. After drive shaft 52 resets, under the action of half row torsion spring, half row gear 531b also resets, and subsequently half row rack 532b and half row push rod 30b also reset.

[0068] Second embodiment (the transmission wheel is a gear, and there are two transmission shafts):

[0069] like Figures 11 to 15 As shown, the switch assembly of the drain valve in the second embodiment of the present invention differs from that in the above embodiment in that, in this embodiment, the drive shaft 52 has two independent shafts, namely a full-drain drive shaft 52a and a half-drain drive shaft 52b. Correspondingly, there are two second helical gears 512, which are coaxially mounted on the full-drain drive shaft 52a and the half-drain drive shaft 52b, respectively. The first helical gear 511 has a half-circle tooth. The full-drain gear 531a is fixed to the full-drain drive shaft 52a, and the half-drain gear 531b is fixed to the half-drain drive shaft 52b. When the knob 20 rotates clockwise, the first helical gear 511 engages with the second helical gear 512 on the full-drain drive shaft 52a. Two helical gears 512 mesh to drive the full-row drive shaft 52a to rotate. The full-row drive shaft 52a then drives the full-row gear 531a to rotate. The full-row gear 531a drives the full-row push rod 30a to extend relative to the knob body 10 through the full-row rack 532a. When the knob 20 reverses, the first helical gear 511 meshes with the second helical gear 512 on the half-row drive shaft 52b to drive the half-row drive shaft 52b to rotate. The half-row drive shaft 52b then drives the half-row gear 531b to rotate. The half-row gear 531b drives the half-row push rod 30b to extend relative to the knob body 10 through the half-row rack 532b.

[0070] like Figure 15As shown, in this embodiment, the elastic reset member 40 adopts a reset spring 42, which springs back between the knob body 10 and the push rod 30.

[0071] In this embodiment, two drive shafts 52 are configured to drive the full row of gears 531a and the half row of gears 531b respectively, which is simple in structure and reliable in function.

[0072] The working process of this embodiment is roughly as follows:

[0073] When the knob 20 is rotated forward, the knob 20 drives the first helical gear 511 on the knob 20 to rotate forward. The half-circle tooth on the first helical gear 511 meshes with the second helical gear 512 on the full-row drive shaft 52a, thereby driving the full-row drive shaft 52a to rotate forward. The first helical gear 511 does not mesh with the second helical gear 512 on the half-row drive shaft 52b, and the half-row drive shaft 52b remains stationary. When the full-row drive shaft 52a rotates forward, it drives the full-row gear 531a to rotate. The full-row gear 531a then drives the full-row rack 532a to slide. The full-row rack 532a further drives the full-row push rod 30a, causing the full-row push rod 30a to extend relative to the knob body 10, thereby driving the drain valve to drain completely. When the full-row push rod 30a extends relative to the knob body 10, it compresses the return spring 42, causing the return spring 42 to elastically deform. When the external force applied to the knob 20 is removed, the reset spring 42 drives the full-row push rod 30a and the full-row rack 532a to reset. The full-row rack 532a then causes the full-row gear 531a to reset. The full-row gear 531a further drives the full-row drive shaft 52a to reset. The full-row drive shaft 52a drives the knob 20 to reset through the meshing of the first helical gear 511 and the second helical gear 512. At the same time, a knob reset torsion spring 43 can be set between the knob 20 and the knob body 10 to assist the knob 20 in resetting.

[0074] When the knob 20 is rotated in the reverse direction, the knob 20 drives the first helical gear 511 on the knob 20 to rotate in the reverse direction. The half-circle tooth on the first helical gear 511 meshes with the second helical gear 512 on the half-row drive shaft 52b, thereby driving the half-row drive shaft 52b to rotate. The first helical gear 511 does not mesh with the second helical gear 512 on the full-row drive shaft 52a, and the full-row drive shaft 52a remains stationary. When the half-row drive shaft 52b rotates, it drives the half-row gear 531b to rotate. The half-row gear 531b then drives the half-row rack 532b to slide. The half-row rack 532b further drives the half-row push rod 30b, causing the half-row push rod 30b to extend relative to the knob body 10, thereby driving the drain valve to partially drain. When the half-row push rod 30b extends relative to the knob body 10, it compresses the return spring 42, causing the return spring 42 to elastically deform. When the external force applied to the knob 20 is removed, the reset spring 42 drives the half-row push rod 30b and the half-row rack 532b to reset. The half-row rack 532b then causes the half-row gear 531b to reset. The half-row gear 531b further drives the half-row drive shaft 52b to reset. The half-row drive shaft 52b drives the knob 20 to reset through the meshing of the first helical gear 511 and the second helical gear 512. At the same time, a knob reset torsion spring 43 can be provided between the knob 20 and the knob body 10 to assist the knob 20 in resetting.

[0075] Third embodiment (the transmission wheel is a cam):

[0076] In a third embodiment (not shown), the rack and pinion drive pair 53 of the first embodiment can be replaced with a cam (not shown). That is, the transmission mechanism 50 includes a helical gear drive pair 51, a drive shaft 52, and a cam. Specifically, the drive shaft 52 is rotatably mounted on the knob body 10. The helical gear drive pair 51 includes a first helical gear 511 mounted on the inner end of the knob 20 and a second helical gear 512 mounted on the drive shaft 52. The cam is fixed to the drive shaft 52 to rotate with it. When the knob 20 rotates, the helical gear drive pair 51 drives the drive shaft 52 to rotate. The drive shaft 52 then abuts against the push rod 30 via the cam, causing the push rod 30 to slide outward relative to the knob body 10. Alternatively, the rack and pinion drive pair 53 of the first embodiment can be replaced with a worm gear (not shown). That is, the transmission mechanism 50 includes a helical gear drive pair 51, a drive shaft 52, and a worm gear. The transmission mechanism 50 also includes a worm gear (not shown) movably mounted on the knob body 10 and engaging with the push rod 30.

[0077] Similarly, in this embodiment, the push rod 30 may also include a full-row push rod 30a and a half-row push rod 30b. Correspondingly, the cam includes a full-row cam (not shown) and a half-row cam (not shown). When the knob 20 rotates forward, it drives the transmission shaft 52 to rotate forward through the helical gear transmission pair 51, and the transmission shaft 52 drives the full-row cam to rotate. When the knob 20 rotates in reverse, it drives the transmission shaft 52 to rotate in reverse through the helical gear transmission pair 51, and the transmission shaft 52 drives the half-row cam to rotate.

[0078] This embodiment can be combined with the first embodiment, that is, the transmission shaft 52 is provided in one way: Specifically, the first helical gear 511 has a full circle of teeth arranged circumferentially, the transmission shaft 52 is provided with a full row of abutting blocks 521a and a half row of abutting blocks 521b, the full row of cams is provided with a full row of mating blocks 54a that abut against the full row of abutting blocks 521a, and the half row of cams is provided with a half row of mating blocks 54b that abut against the half row of abutting blocks 521b. When the transmission shaft 52 rotates forward, the full row of abutting blocks 521a abuts against the full row of mating blocks 54a, thereby driving the full row of cams to rotate, and the half row of abutting blocks 521b separates from the half row of mating blocks 54b; when the transmission shaft 52 rotates in reverse, the half row of abutting blocks 521b abuts against the half row of mating blocks 54b, thereby driving the half row of cams to rotate, and the full row of abutting blocks 521a separates from the full row of mating blocks 54a.

[0079] This embodiment can be combined with the second embodiment, using a configuration where the transmission shaft 52 has two parts. Correspondingly, the full-row cam is fixed to the full-row transmission shaft 52a, and the half-row cam is fixed to the half-row transmission shaft 52b. When the knob 20 rotates forward, the first helical gear 511 meshes with the second helical gear 512 on the full-row transmission shaft 52a to drive the full-row transmission shaft 52a to rotate. The full-row transmission shaft 52a then drives the full-row cam to rotate, and the full-row cam abuts against the full-row push rod 30a, causing the full-row push rod 30a to extend relative to the knob body 10. When the knob 20 rotates in reverse, the first helical gear 511 meshes with the second helical gear 512 on the half-row transmission shaft 52b to drive the half-row transmission shaft 52b to rotate. The half-row transmission shaft 52b then drives the half-row cam to rotate, and the half-row cam abuts against the half-row push rod 30b, causing the half-row push rod 30b to extend relative to the knob body 10.

[0080] In other embodiments not illustrated, the knob can also be rotated in the same direction, controlling the full and half rows by controlling its rotation angle. Specifically: when the knob is rotated to a first angle in a first direction (which can be clockwise or counterclockwise), the knob, in conjunction with the half-row push rod, extends outward relative to the knob body 10. When the knob is rotated further in the first direction to a second angle (the second angle is greater than the first angle), the knob, in conjunction with the full-row push rod, extends outward relative to the knob body 10. Controlling the extension of the full-row push rod or the half-row push rod by rotating at different angles can be achieved using existing structures that achieve different drives through different strokes.

[0081] In addition, the present invention also provides a drain valve, including a drain valve body and a drain valve switching assembly, the switching assembly driving the drain valve body to open and drain water, the switching assembly being the drain valve switching assembly of any of the above-mentioned embodiments.

[0082] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail to the invention without departing from the spirit and scope of the invention as defined in the appended claims are within the scope of protection of the invention.

Claims

1. An on-off assembly for a drain valve, characterized by The application relates to a knob, which comprises: a knob body provided with a hollow inner cavity; a knob rotatably arranged on the knob body; a top rod movably arranged on the knob body; a transmission mechanism arranged in the hollow inner cavity, the knob is connected with the top rod through the transmission mechanism to control the outward extension of the top rod relative to the knob body; the transmission mechanism comprises a helical gear transmission pair, a transmission shaft rotatably arranged on the knob body and a transmission wheel arranged on the transmission shaft, the helical gear transmission pair comprises a first helical gear arranged on the inner end of the knob and a second helical gear coaxially arranged on the transmission shaft, the rotation of the knob drives the rotation of the transmission shaft through the helical gear transmission pair, and the transmission shaft further drives the outward extension of the top rod relative to the knob body through the transmission wheel; the top rod comprises a full-row top rod and a half-row top rod, correspondingly, the transmission shaft comprises a full-row transmission shaft and a half-row transmission shaft which are rotatably arranged on the knob body independently, the second helical gears are arranged on the full-row transmission shaft and the half-row transmission shaft respectively, the transmission wheel comprises a full-row transmission wheel arranged on the full-row transmission shaft and a half-row transmission wheel arranged on the half-row transmission shaft; the first helical gear has half a circle of teeth, when the knob rotates forward, the first helical gear meshes with the second helical gear on the full-row transmission shaft to drive the rotation of the full-row transmission shaft, and the full-row transmission shaft further drives the outward extension of the full-row top rod relative to the knob body through the full-row transmission wheel; when the knob rotates reversely, the first helical gear meshes with the second helical gear on the half-row transmission shaft to drive the rotation of the half-row transmission shaft, and the half-row transmission shaft further drives the outward extension of the half-row top rod relative to the knob body through the half-row transmission wheel.

2. A switch assembly for a drain valve, characterized by The application relates to a knob, which comprises: a knob body provided with a hollow inner cavity; a knob rotatably arranged on the knob body; a top rod movably arranged on the knob body; a transmission mechanism arranged in the hollow inner cavity, the knob is connected with the top rod through the transmission mechanism to control the outward extension of the top rod relative to the knob body; the transmission mechanism comprises a helical gear transmission pair, a transmission shaft rotatably arranged on the knob body and a transmission wheel arranged on the transmission shaft, the helical gear transmission pair comprises a first helical gear arranged on the inner end of the knob and a second helical gear coaxially arranged on the transmission shaft, the rotation of the knob drives the rotation of the transmission shaft through the helical gear transmission pair, and the transmission shaft further drives the outward extension of the top rod relative to the knob body through the transmission wheel; The ejection rod comprises full-row ejection rods and half-row ejection rods, and the transmission wheel comprises full-row transmission wheels and half-row transmission wheels, the full-row transmission wheels and the half-row transmission wheels are rotatably arranged on the same transmission shaft, the transmission shaft is provided with a full-row abutting block and a half-row abutting block, the full-row transmission wheel is provided with a full-row matching block, the half-row transmission wheel is provided with a half-row matching block, when the transmission shaft rotates in a forward direction, the full-row abutting block abuts against the full-row matching block to drive the full-row transmission wheel to rotate, and when the transmission shaft rotates in a reverse direction, the half-row abutting block abuts against the half-row matching block to drive the half-row transmission wheel to rotate.

3. A switch assembly for a drain valve according to claim 1 or 2, wherein The ejection rod is slidably arranged on the knob body, and the knob, the transmission mechanism and the ejection rod are automatically reset under the action of the elastic reset member.

4. A switch assembly for a drain valve as defined in claim 3, wherein The elastic reset member is arranged between the knob body and the ejection rod, between the knob body and the knob, between the knob body and the transmission mechanism, or in the transmission mechanism.

5. The switch assembly of claim 1 or 2, wherein, The transmission wheel is a gear, the transmission mechanism further comprises a gear rack slidably arranged on the knob body and linked with the ejection rod, or the transmission wheel is a worm wheel, the transmission mechanism further comprises a worm slidably arranged on the knob body and linked with the ejection rod, or the transmission wheel is a cam.

6. The switch assembly of claim 2, wherein the valve is a drain valve. When the transmission shaft rotates in the forward direction, the half-row abutting block is separated from the half-row matching block, and when the transmission shaft rotates in the reverse direction, the full-row abutting block is separated from the full-row matching block, the full-row torsion spring has one end connected with the full-row abutting block and the other end connected with the full-row matching block to apply an elastic force to the full-row abutting block and the full-row matching block in a direction of abutting against each other, and the full-row torsion spring is elastically deformed when the full-row abutting block is separated from the full-row matching block, and the half-row torsion spring has one end connected with the half-row abutting block and the other end connected with the half-row matching block to apply an elastic force to the half-row abutting block and the half-row matching block in a direction of abutting against each other, and the half-row torsion spring is elastically deformed when the half-row abutting block is separated from the half-row matching block.

7. A switch assembly for a drain valve as defined in claim 6, wherein The full-row ejection rod and the half-row ejection rod are respectively provided with second limiting parts matched with first limiting parts on the knob body. When the transmission shaft rotates in the forward direction, the second limiting part on the half-row ejection rod is matched with the first limiting part to limit the half-row ejection rod from sliding in a direction opposite to the extending direction of the half-row ejection rod, so that the half-row abutting block is separated from the half-row matching block. When the transmission shaft rotates in the reverse direction, the second limiting part on the full-row ejection rod is matched with the first limiting part to limit the full-row ejection rod from sliding in a direction opposite to the extending direction of the full-row ejection rod, so that the full-row abutting block is separated from the full-row matching block.

8. A drain valve comprising a drain valve body and a switch assembly of the drain valve, the switch assembly driving the drain valve body to open a drain, characterized by, The switch assembly adopts the switch assembly of the drain valve according to any one of claims 1 to 7.

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