A multi-link drainage starting device and a drainage valve

Abstract

The present invention discloses a multi-link drainage starting device and a drainage valve, wherein the multi-link drainage starting device includes a pressing mechanism and a connecting rod mechanism, wherein the pressing mechanism includes a button seat and a button, wherein the button can move up and down in the button seat, and the connecting rod mechanism includes a pressure rod, a connecting rod and a lifting rod connected to each other, wherein the middle portion of the pressure rod is hinged on the button seat, and the multi-link drainage starting device also includes a balancing mechanism, wherein the balancing mechanism includes a rocker rod, wherein the rocker rod and the pressure rod are connected to the same end of the connecting rod, wherein the rocker rod can be linked with the pressure rod, and wherein the rocker rod can control the lifting rod to move only on the same vertical line. The drainage valve includes the multi-link drainage starting device as described above. The adoption of the present invention can reduce the probability of generating lateral torque, ensure the stability of drainage and water shut-off, and can reduce the pressing driving force as a whole.

Description

Technical Field

[0001] The present invention relates to the technical field of drain valves, and in particular to a multi-link drain starting device and a drain valve. Background Art

[0002] Existing toilet drain valves often use a lever structure as the valve port actuation device of the drain valve, see Figure 7 When in use, the user presses the drain valve button, and the button will push down to drive the pressure rod to swing. Under the action of the lever, the pressure rod will directly drive the lifting rod to lift the valve core rod, and the sealing plug on the valve core rod will open, thereby completing the opening action to achieve drainage. This drainage start-up scheme has the following disadvantages: (1) In order to prevent the valve core rod from swinging during the up and down movement, a guide structure is provided in the drain valve to limit the position. When the pressure rod drives the lifting rod to lift the valve core rod, the valve core rod will generate a lateral torque due to the lateral lifting. There is a large friction between the valve core rod and the guide structure, which leads to a large driving force for pressing the button and poor drainage stability; (2) In order to ensure the lifting distance of the valve core rod, the power arm L1' of the pressure rod is short and the resistance arm L2' is long, resulting in a large driving force and a poor pressing feel. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a multi-link drainage starting device that can reduce the probability of generating lateral torque, ensure the stability of drainage and water shut-off, and can reduce the overall pressing driving force.

[0004] In order to solve the above technical problems, the present invention provides a multi-link drainage starting device, which is installed on a drain valve and includes a pressing mechanism and a connecting rod mechanism. The pressing mechanism includes a button seat and a button, and the button can move up and down in the button seat. The connecting rod mechanism includes a pressure rod, a connecting rod and a lifting rod connected to each other. The middle part of the pressure rod is hinged to the button seat. The drain valve is provided with a valve port and a sealing plug. One end of the lifting rod is connected to the sealing plug, and the other end is connected to the connecting rod. The button can drive one end of the pressure rod to pry the lifting rod upward and drive the sealing plug to open the valve port.

[0005] The multi-link drainage starting device also includes a balancing mechanism, which includes a rocker arm. The rocker arm and the pressure rod are connected to the same end of the connecting rod. The rocker arm can be linked with the pressure rod, and the rocker arm can control the lifting rod to move only on the same vertical line.

[0006] As an improvement of the above-mentioned solution, the connecting rod is divided into a swing section and a lifting section. The swing section is located at one end of the connecting rod close to the button seat, and the lifting section is located at one end of the connecting rod close to the valve port. A first hinge is provided at the lower part of the swing section, and the end of the pressure rod close to the connecting rod is a connecting end, which is hinged to the first hinge.

[0007] A second hinge is provided at the upper portion of the swing section, one end of the swing rod is hinged to the second hinge, the vertical line where the lifting rod movement trajectory is located is set as a moving line, and the first hinge and the second hinge both deviate from the moving line.

[0008] As an improvement to the above-mentioned solution, a fixing plate is provided under the button seat, and a third hinge and a fourth hinge are provided on the fixing plate. The fourth hinge is located directly above the third hinge. The middle part of the pressure rod is hinged to the third hinge, and the end of the rocker arm away from the connecting rod is hinged to the fourth hinge. The third hinge and the fourth hinge are both located on the moving line.

[0009] As an improvement to the above-mentioned solution, the distance from the first hinge to the third hinge is smaller than the distance from the second hinge to the fourth hinge, and when the rocker arm swings upward, the second hinge can move relative to the first hinge in a direction away from the moving line.

[0010] As an improvement of the above solution, a fifth hinge is provided on the lifting section, the lifting rod is hinged at the fifth hinge, the fifth hinge is located directly above the sealing plug, and the fifth hinge, the fourth hinge and the third hinge are always located on the moving line.

[0011] When the fifth hinge is located at the lower limit position of the drain valve, the first hinge and the second hinge are both lower than the third hinge.

[0012] As an improvement to the above solution, an inclined section is provided between the pulling section and the swing section, and the inclined section is inclined relative to the swing section toward the direction of the moving line.

[0013] As an improvement to the above solution, the angle between the tilting section and the swinging section is 135°.

[0014] As an improvement of the above solution, the end of the pressure rod away from the connecting rod is a touch end, and a touch boss is provided under the button. The touch boss protrudes downward and corresponds to the position of the touch end. The touch boss can press the touch end downward and drive the connecting end to tilt upward.

[0015] The surface of the touch end is an arc-shaped surface.

[0016] As an improvement of the above solution, the drain valve is further provided with a valve core rod, which is connected to the top of the sealing plug, the upper end of the valve core rod is clamped to the bottom of the lifting rod, and the valve core rod is arranged on the moving line.

[0017] As an improvement of the above-mentioned scheme, the multi-link drainage starting device also includes a guide mechanism, which includes an upper guide hole and a lower guide hole. The upper guide hole and the lower guide hole are respectively arranged at the upper and lower parts of the drainage valve, and the valve core rod can move up and down in the upper guide hole and the lower guide hole.

[0018] As an improvement to the above solution, the button is arranged in the button seat, and a return spring is provided between the button and the button seat.

[0019] The present invention also provides a drain valve comprising the multi-link drain starting device as described above.

[0020] The implementation of the present invention has the following beneficial effects:

[0021] When the user presses the button, the button can move downward and drive one end of the pressure rod downward, and the other end of the pressure rod is hinged with a connecting rod, and the connecting rod is hinged with the lifting rod, so that the lifting rod will be pried up and move upward and drive the sealing plug in the drain valve, thereby opening the valve mouth for drainage. Since the balancing mechanism is provided with a rocker arm, the rocker arm and the pressure rod are connected to the same end of the connecting rod, the rocker arm can be linked with the pressure rod, and the rocker arm can control the lifting rod to move only on the same vertical line. In this way, when the lifting rod moves upward, the guide mechanism in the drain valve will not continuously generate contact friction with the lifting rod, thereby reducing the probability of generating lateral torque, that is, reducing the resistance of the lifting rod to rise, thereby reducing the pressing driving force. When draining water or shutting off water, the lifting rod is seldom affected by the friction of the guide structure, thereby ensuring the efficiency of draining water or shutting off water and improving the stability of the drain valve in use.

[0022] In addition, since the fulcrum for prying the lifting rod is located in the middle of the pressure rod, the length of the power arm is similar to the length of the resistance arm. Therefore, compared with the traditional structure in which the power arm is much smaller than the resistance arm, the present invention can reduce the power required for pressing, and combined with the balancing mechanism, it can further significantly reduce the pressing driving force. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1This is a schematic structural diagram of the multi-link drainage starting device of the present invention from a first perspective;

[0024] Figure 2 It is a structural schematic diagram of the key base of the present invention;

[0025] Figure 3 This is a schematic structural diagram of the multi-link drainage starting device of the present invention from a second perspective;

[0026] Figure 4 yes Figure 3 Partial diagram of A in the middle;

[0027] Figure 5 This is a schematic structural diagram of the multi-link drainage starting device of the present invention in the first state;

[0028] Figure 6 This is a schematic structural diagram of the multi-link drainage starting device of the present invention in the second state;

[0029] Figure 7 It is a structural diagram of an existing drainage starting device. DETAILED DESCRIPTION

[0030] To make the objectives, technical solutions, and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings. It is hereby stated that any directional terms such as "up," "down," "left," "right," "front," "back," "inside," and "outside" that appear or will appear herein are based solely on the accompanying drawings and are not intended to limit the present invention.

[0031] See also Figure 1The present invention discloses a multi-link drain activation device, which is mounted on a drain valve 10 and is used to activate and close the drain valve 10. The multi-link drain activation device includes a pressing mechanism 1 and a connecting rod mechanism 2. The pressing mechanism 1 is used to drive the connecting rod mechanism 2. The pressing mechanism 1 includes a button seat 11 and a button 12. The button 12 can move up and down within the button seat 11. When a user needs to open the drain valve 10, the button 12 is pressed to move downward. The button 12 can be a single button or a double button with full and half drain functions. The connecting rod mechanism 2 includes a pressure rod 21, a connecting rod 22 and a lifting rod 23 that are connected to each other. The middle part of the pressure rod 21 is hinged to the button seat 11. The hinge point between the pressure rod 21 and the button seat 11 is the fulcrum of the lifting rod 23. The drain valve 10 is provided with a valve port 102 and a sealing plug 103. One end of the lifting rod 23 is indirectly connected to the sealing plug 103, and the other end is connected to the connecting rod 22. The connecting rod 22 is connected to the pressure rod 21. Therefore, when the button 12 is pressed, the button 12 can move downward. The button 12 will touch one end of the pressure rod 21. Under the action of the fulcrum, the lifting rod 23 at the other end of the pressure rod 21 will be pried up. Since the lifting rod 23 is connected to the sealing plug 103, the lifting rod 23 will drive the sealing plug 103 to rise from the valve port 102, thereby opening the drain valve 10 and achieving drainage. Therefore, the button 12 can drive one end of the pressure rod 21 to pry the lifting rod 23 upward and drive the sealing plug 103 to open the valve port 102, completing the drainage action. During the pressing process, because the fulcrum is located in the middle of the pressure rod 21, the length of the power arm L1 is substantially equal to the length of the resistance arm L2, which is greater than the length ratio of the power arm L1' to the resistance arm L2' in the traditional pressure rod 21. Therefore, according to the lever principle, in the same drain valve 10, the driving force required to press the button 12 is less than the driving force required by the traditional pressure rod 21, thereby reducing the pressing driving force to a certain extent. The lifting rod 23 can be a hard rod or a soft lifting object such as a rope, chain, etc.

[0032] The multi-link drainage starting device also includes a balancing mechanism 3, which is used to balance the forces on both sides of the lifting rod 23 so that the lifting rod 23 can move in a vertical line. Specifically, the balancing mechanism 3 includes a rocker rod 31, and the rocker rod 31 and the pressure rod 21 are connected to the same end of the connecting rod 22. The rocker rod 31 can be linked with the pressure rod 21. When the button 12 is pressed, the pressure rod 21 causes the lifting rod 23 to tilt and lift the lifting rod 23, and the rocker rod 31 simultaneously acts to support the connecting rod 22 connected to the lifting rod 23 so that the lifting rod 23 does not deviate left or right, so that the rocker rod 31 can control the lifting rod 23 to move only in the same vertical line.

[0033] The beneficial effects of the embodiments of the present invention are as follows:

[0034] The multi-link drainage starting device of the embodiment of the present invention is provided with a pressing mechanism 1, a connecting rod mechanism 2 and a balancing mechanism 3, wherein the pressing mechanism 1 includes a button 12 and a button seat 11, and the connecting rod mechanism 2 includes a pressing rod 21, a connecting rod 22 and a lifting rod 23, wherein the middle portion of the pressing rod 21 is hinged on the button seat 11, and when the user presses the button 12, the button 12 can move downward and drive one end of the pressing rod 21 downward, the pressing rod 21 is hinged to the connecting rod 22, and the other end of the connecting rod 22 is hinged to the lifting rod 23, so that the lifting rod 23 will be pried up and move upward and drive the The sealing plug 103 in the drain valve 10 opens the valve port 102 to drain water. Because the balancing mechanism 3 includes a rocker arm 31, which is connected to the same end of the connecting rod 22 as the pressure rod 21, the rocker arm 31 can be linked with the pressure rod 21 and control the movement of the lifting rod 23 to only move along the same vertical line. As the lifting rod 23 moves upward, the guide mechanism 4 in the drain valve 10 does not continuously generate contact friction with the lifting rod 23, reducing the probability of generating lateral torque. This reduces the upward resistance of the lifting rod 23 and thus the pressing driving force. During both draining and shutting off, the lifting rod 23 is rarely affected by the friction of the guide structure, thus ensuring efficient drainage and shutting off, and improving the stability of the drain valve 10. In addition, since the fulcrum for prying the lifting rod 23 is located in the middle of the pressure rod 21, the length of the power arm L1 is similar to the length of the resistance arm L2. Therefore, compared with the traditional structure in which the power arm L1' is much smaller than the resistance arm L2', the present invention can reduce the power required for pressing, and combined with the balancing mechanism 3, it can further significantly reduce the pressing driving force.

[0035] Specifically, see Figure 3The connecting rod 22 is divided into a swing section 221 and a lifting section 222. The swing section 221 is located at the end of the connecting rod 22 close to the button seat 11, and the lifting section 222 is located at the end of the connecting rod 22 close to the valve port 102. In this embodiment, the swing section 221 is the upper end of the connecting rod 22 and is connected to the rocker rod 31, and the lifting section 222 is the lower end of the connecting rod 22 and is connected to the lifting rod 23. The lower part of the swing section 221 is provided with a first hinge 51, and the end of the pressure rod 21 close to the connecting rod 22 is a connecting end 212, and the connecting end 212 is hinged to the first hinge 51. The pressure rod 21 can drive the connecting rod 22 to move upward through the first hinge 51. A second hinge 52 is provided at the top of the swing section 221. One end of the swing rod 31 is hinged to the second hinge 52. The swing rod 31 and the pressure rod 21 are both connected to the swing section 221. The pressure rod 21 is used to drive the connecting rod 22 upward, while the swing rod 31 is used to control the horizontal swing amplitude of the connecting rod 22. During use, the pressure rod 21 drives the connecting rod 22 upward, which in turn drives the lifting rod 23 upward, thereby opening the sealing plug 103 and achieving drainage.

[0036] See also Figure 2, a fixed plate 111 is provided below the button seat 11, and a third hinge 53 and a fourth hinge 54 are provided on the fixed plate 111, and the fourth hinge 54 is located directly above the third hinge 53, and the middle part of the pressure rod 21 is hinged to the third hinge 53, and the end of the rocker arm 31 away from the connecting rod 22 is hinged to the fourth hinge 54, so the pressure rod 21 is hinged to the fixed plate 111 and the connecting rod 22 respectively, and the two ends of the rocker arm 31 are hinged to the fixed plate 111 and the connecting rod 22 respectively. The fixed plate 111, the rocker arm 31, the pressure rod 21 and the swing section 221 constitute a double rocker mechanism, in which the fixed plate 111 is a fixed frame part, and the rocker arm 31 and the swing section 221 will be driven during the movement of the pressure rod 21. In this embodiment, the double rocker mechanism is an unequal-length double rocker mechanism, wherein the distance from the first hinge 51 to the second hinge 52 plus the distance from the second hinge 52 to the fourth hinge 54 is less than the distance from the first hinge 51 to the third hinge 53 plus the distance from the third hinge 53 to the fourth hinge 54, and the swing section 221 is capable of swinging on opposite sides of the fixed plate 111. The lifting section 222 is provided with a fifth hinge 55, and the lifting rod 23 is hinged to the fifth hinge 55. The fifth hinge 55 and the lifting rod 23 move synchronously and are both located on the moving line 101. The fifth hinge 55 is located directly above the sealing plug 103, and the fifth hinge 55, the fourth hinge, and the third hinge 53 are always located on the moving line 101.

[0037] See also Figure 5 and Figure 6In order to limit the swing amplitude of the connecting rod 22 in the horizontal direction, the distance from the first hinge 51 to the third hinge 53 is smaller than the distance from the second hinge 52 to the fourth hinge 54. Since the fourth hinge 54 is located directly above the third hinge 53, the fixed frame part of the double rocker mechanism is vertically arranged. The distance from the second hinge 52 to the fourth hinge 54 is equal to the length of the rocker 31 in this embodiment. Therefore, the length of the rocker 31 is greater than the length of the pressure rod 21 in the double rocker mechanism. When the pressure rod When 21 drives the connecting rod 22 to move upward, since the first hinge 51 makes a circular motion around the third hinge 53 and the second hinge 52 makes a circular motion around the fourth hinge 54, the diameter of the circle where the second hinge 52 is located is larger than the diameter of the circle where the first hinge 51 is located. Therefore, when the rocker arm 31 swings upward, the second hinge 52 can move relative to the first hinge 51 in the direction away from the moving line 101, that is, the second hinge 52 will deviate further from the moving line 101 than the first hinge 51. In the process of the lifting rod 23 being lifted by the connecting rod 22, the traditional drain valve 10 does not have the restriction of the rocking rod 31. When the first hinge 51 makes a circular motion around the third hinge 53, the first hinge 51 will gradually deviate from the third hinge 53 in the horizontal direction, and will cause the fifth hinge 55 / lifting rod 23 to deviate from the moving line 101, so that the lifting rod 23 will be subjected to the friction force of the left and right limiting structures of the drain valve 10. In the present invention, under the action of the rocking rod 31, the second hinge 52 will deviate further from the lifting rod 23 than the first hinge 51. Since the swing section 221, the first hinge 51 and the lifting section 222 form a lever mechanism, the first The hinge 51 is a fulcrum. When the second hinge 52 in the swing section 221 deviates from the moving line 101 relative to the fulcrum (the first hinge 51), the fifth hinge 55 / lifting rod 23 will move toward the direction close to the moving line 101. By reasonably setting the lengths of the rocker 31, the swing section 221, the pressure rod 21 and the fixed seat, the movement of the fifth hinge 55 / lifting rod 23 deviating from the moving line 101 and approaching the moving line 101 can be offset, ensuring that the lifting rod 23 can always move on the moving line 101, and can enable the lifting rod 23 to avoid friction with the limiting structure of the drain valve 10 as much as possible, thereby reducing the driving force required to press the pressure rod 21.In this embodiment, the ratio of the distance between the first hinge 51 and the second hinge 52, the distance between the first hinge 51 and the third hinge 53, the distance between the third hinge 53 and the fourth hinge 54, and the distance between the fourth hinge 54 and the second hinge 52 is 1:2.8:1.5:3.145.

[0038] When the fifth hinge 55 is located at the lower limit position of the drain valve 10, that is, when the sealing plug 103 is located at the lower limit position of the drain valve 10, the first hinge 51 and the second hinge 52 are both lower than the third hinge 53. In this way, when the lifting rod 23 is lifted, the first hinge 51 and the second hinge 52 are both in a position where they can deviate from their respective "centers of the circle" (the third hinge 53 and the fourth hinge 54), thereby providing conditions for the second hinge 52 to drive the fifth hinge 55 / lifting rod 23 to approach the moving line 101. In addition, since the first hinge 51 and the second hinge 52 are both deviated from the moving line 101, in order to make the fifth hinge located on the moving line 101, an inclined section 223 is provided between the lifting section 222 and the swing section 221. The inclined section 223 is inclined relative to the swing section 221 toward the direction of the moving line 101. In this embodiment, the angle between the inclined section 223 and the swing section 221 is α, and α is 135°.

[0039] See also Figure 4 The end of the pressure rod 21 away from the connecting rod 22 is the touch end 211. A touch boss 121 is provided below the button 12. The touch boss 121 protrudes downward and corresponds to the position of the touch end 211. When drainage needs to be triggered, the user presses the button 12, and the touch boss 121 can press the touch end 211 downward and drive the connecting end 212 to tilt upward. Under the pulling action of the connecting rod 22, the lifting rod 23 and the sealing plug 103 are driven. During the process of pressing the button 12, the pressure rod 21 will rotate. In order to improve the smoothness of the sliding of the touch end 211 on the touch boss 121, the surface of the touch end 211 is set as a curved surface, thereby ensuring that there is no sense of frustration when pressing.

[0040] The button 12 is disposed in the button seat 11, and a return spring 13 is provided between the button 12 and the button seat 11. After being pressed, the button 12 is reset by the return spring 13. The drain valve 10 is also provided with a valve core rod 104, which is connected to the top of the sealing plug 103. The upper end of the valve core rod 104 is clamped to the bottom of the lifting rod 23, and the valve core rod 104 is provided on the moving line 101. After drainage is completed, the button 12 will be reset first, and the sealing plug 103 will be driven downward by the valve core rod 104 under the action of gravity, thereby allowing the pressure rod 21 to be reset and the touch end 211 to be re-contacted on the touch boss 121. In order to further ensure the stability of drainage and improve the fault tolerance of the system, the multi-link drainage starting device also includes a guide mechanism 4, which includes an upper guide hole 41 and a lower guide hole 42. The upper guide hole 41 and the lower guide hole 42 are respectively arranged at the upper and lower parts of the drainage valve 10, and the valve core rod 104 can move up and down in the upper guide hole 41 and the lower guide hole 42. Since the lifting rod 23 drives the valve core rod 104 to move only on the moving line 101, the probability of the valve core rod 104 contacting the upper guide hole 41 and the lower guide hole 42 is small, which can ensure that the driving resistance and reset resistance are reduced.

[0041] The embodiment of the present invention further discloses a drain valve 10, which includes the multi-link drain activation device described above. The drain valve 10 is provided with a button 12 and a pressure rod 21, a connecting rod 22, and a lifting rod 23 connected to each other. The drain valve 10 is provided with a valve port 102 and a sealing plug 103. One end of the lifting rod 23 is indirectly connected to the sealing plug 103, and the other end is connected to the pressure rod 21 through the connecting rod 22. When the button 12 is pressed, the button 12 can move downward, and the button 12 will touch one end of the pressure rod 21. Under the action of the fulcrum, the lifting rod 23 at the other end of the pressure rod 21 will be pried up. Since the lifting rod 23 is connected to the sealing plug 103, the lifting rod 23 will drive the sealing plug 103 to rise from the valve port 102, thereby opening the drain valve 10 and achieving drainage. During the pressing process, the swing arm 31 can be linked with the pressure rod 21, and the swing arm 31 can control the lifting rod 23 to move only along the same vertical line. As the lifting rod 23 moves upward, the guide mechanism 4 in the drain valve 10 does not continuously generate contact friction with the lifting rod 23, reducing the probability of generating lateral torque. In other words, it reduces the resistance to the lifting rod 23's upward movement, thereby reducing the pressing driving force. Moreover, because the fulcrum is located in the middle of the pressure rod 21, the length of the power arm L1 is substantially equal to the length of the resistance arm L2, which is greater than the ratio of the power arm L1' to the resistance arm L2' in a conventional pressure rod 21. Therefore, according to the law of levers, in the same drain valve 10, the driving force required to press the button 12 is less than that required by a conventional pressure rod 21, thereby further reducing the pressing driving force.

[0042] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A multi-link drainage starting device, installed on a drainage valve, characterized in that: The invention comprises a pressing mechanism and a connecting rod mechanism, wherein the pressing mechanism comprises a button seat and a button, wherein the button can move up and down in the button seat, and the connecting rod mechanism comprises a pressing rod, a connecting rod and a lifting rod connected to each other, wherein the middle portion of the pressing rod is hinged to the button seat, and the drain valve is provided with a valve port and a sealing plug, wherein one end of the lifting rod is connected to the sealing plug, and the other end is connected to the connecting rod, and the button can drive one end of the pressing rod to pry the lifting rod upward and drive the sealing plug to open the valve port; The multi-link drainage activation device further includes a balancing mechanism, the balancing mechanism including a swing rod, the swing rod and the pressure rod being connected to the same end of the connecting rod, the swing rod being able to move in conjunction with the pressure rod, and the swing rod being able to control the lifting rod to move only in the same vertical line; The connecting rod is divided into a swing section and a lifting section. The swing section is located at the end of the connecting rod close to the button seat, and the lifting section is located at the end of the connecting rod close to the valve port. A first hinge is provided at the lower part of the swing section. The end of the pressure rod close to the connecting rod is a connecting end, and the connecting end is hinged to the first hinge. A second hinge is provided at the upper portion of the swing section, one end of the swing rod is hinged to the second hinge, a vertical line on which the lifting rod's motion trajectory lies is set as a moving line, and both the first hinge and the second hinge deviate from the moving line; An inclined section is provided between the lifting section and the swing section, and the inclined section is inclined relative to the swing section toward the direction of the moving line; The end of the pressure rod away from the connecting rod is the touch end, and a touch boss is provided under the button. The touch boss protrudes downward and corresponds to the position of the touch end. The touch boss can press the touch end downward and drive the connecting end to tilt upward.

2. The multi-link drainage starting device according to claim 1, characterized in that: A fixing plate is provided below the button seat, and a third hinge and a fourth hinge are provided on the fixing plate. The fourth hinge is located directly above the third hinge. The middle part of the pressure rod is hinged to the third hinge, and the end of the rocker arm away from the connecting rod is hinged to the fourth hinge. The third hinge and the fourth hinge are both located on the moving line.

3. The multi-link drainage starting device according to claim 2, characterized in that: The distance from the first hinge to the third hinge is smaller than the distance from the second hinge to the fourth hinge. When the rocker arm swings upward, the second hinge can move relative to the first hinge in a direction away from the moving line.

4. The multi-link drainage starting device according to claim 3, characterized in that: The lifting section is provided with a fifth hinge, the lifting rod is hinged at the fifth hinge, the fifth hinge is located directly above the sealing plug, and the fifth hinge, the fourth hinge and the third hinge are always located on the moving line; When the fifth hinge is located at the lower limit position of the drain valve, the first hinge and the second hinge are both lower than the third hinge.

5. The multi-link drainage starting device according to claim 1, characterized in that: The angle between the tilting section and the swinging section is 135°.

6. The multi-link drainage starting device according to claim 1, characterized in that: The surface of the touch end is an arc-shaped surface.

7. The multi-link drainage starting device according to claim 1, characterized in that: The drain valve is further provided with a valve core rod, which is connected to the top of the sealing plug. The upper end of the valve core rod is clamped to the bottom of the lifting rod, and the valve core rod is arranged on the moving line.

8. The multi-link drainage starting device according to claim 7, characterized in that: The multi-link drainage starting device also includes a guide mechanism, which includes an upper guide hole and a lower guide hole. The upper guide hole and the lower guide hole are respectively arranged at the upper and lower parts of the drainage valve, and the valve core rod can move up and down in the upper guide hole and the lower guide hole.

9. The multi-link drainage starting device according to claim 1, characterized in that: The button is arranged in the button seat, and a return spring is arranged between the button and the button seat.

10. A drain valve, characterized in that: It comprises a multi-link drainage starting device as described in any one of claims 1 to 9.

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