CN218187440U

CN218187440U - Pulse flusher switch self-locking device and pulse flusher

Info

Publication number: CN218187440U
Application number: CN202221427217.7U
Authority: CN
Inventors: 肖经文; 熊传捷; 彭熙; 刘超; 余丹
Original assignee: Chengdu Gt Medical Devices Co ltd
Current assignee: Chengdu Gt Medical Devices Co ltd
Priority date: 2022-06-09
Filing date: 2022-06-09
Publication date: 2023-01-03
Anticipated expiration: 2032-06-09

Abstract

The utility model discloses a pulse flusher switch self-lock device and pulse purger, first aspect, a pulse flusher switch self-lock device, including the switch thick stick, the switch thick stick includes the operation portion, the switch thick stick includes self-locking portion, is equipped with reset spring on the switch thick stick, still including locking the subassembly, is equipped with the locking breach in the self-locking portion, still is equipped with the fly leaf on the self-locking portion. The second aspect, a pulse flusher, including the casing, still include foretell pulse flusher switch self-lock device, the locking subassembly includes pawl and pawl spring, the bottom contact of pawl spring one end and pawl, is equipped with the guide bar on the bottom of pawl, and the pawl spring housing is equipped with the installed part outside the guide bar, is equipped with cavity and through-hole on the installed part on the casing, the bottom contact of pawl spring one end and pawl, the other end and the terminal surface contact of through-hole of pawl spring. The utility model discloses can lock automatically in the use, can make the pulse flusher continue to continue output pulse rivers after the pine hand.

Description

Pulse flusher switch self-locking device and pulse flusher

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to pulse flusher switch self-lock device and pulse purger.

Background

The pulse irrigator is widely applied to operations, the pulse irrigator is used for irrigating wound tissues by utilizing pulsating water flow under certain pressure, and bacteria, foreign matters and the like in the wound are separated from the tissues by virtue of the bouncing effect through the oscillation effect of the pulse water flow, so that the aim of thoroughly debriding is fulfilled.

The existing pulse flusher needs to continuously press the switch in the using process, cannot continuously generate pulse water flow after hands are loosened, and is inconvenient to use.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pulse flusher switch self-lock device and pulse purger, it can lock automatically in the use, can make the pulse flusher continue to last output pulse rivers after the loose hand.

In order to solve the technical problem, the utility model discloses a following scheme:

first aspect, a pulse flusher switch self-lock device, including being used for setting up the switch thick stick that comes control pulse flusher switch on the casing of pulse flusher, the switch thick stick is including being used for the operating portion with the external force contact of drive switch thick stick motion, the switch thick stick includes self-locking portion, and the switch thick stick is equipped with reset spring towards the casing in the one side, still including being used for setting up the locking Assembly on the pulse flusher casing, is equipped with the locking breach that is used for supplying the locking Assembly to get into in the self-locking portion, still is equipped with the fly leaf on the self-locking portion, and the locking Assembly passes through the locking breach with the motion business turn over locking breach of switch thick stick and under the state with the fly leaf contact and with the separation of self-locking portion. The switch lever is provided with a closing position enabling the locking assembly to be positioned outside the self-locking part and the movable plate, a locking position enabling the locking assembly to be positioned in the locking notch, a transition position enabling the locking assembly to be in contact with the movable plate, separated from the self-locking part and enabling the return spring to be in the maximum compression state, and a return position enabling the locking assembly to be in contact with the movable plate, separated from the self-locking part and enabling the return spring to be in the process of returning to the original length of the return spring. The pulse flusher has the advantages that through the arrangement of the switch lever and the locking assembly, when the operating part of the switch lever is not stressed, the locking assembly is positioned outside the movable plate and the side wall of the self-locking part, the switch lever is in a closed position, and the pulse flusher is in a closed state; when the operating part of the switch lever is just stressed, the locking assembly moves towards the locking notch under the state that the locking assembly is kept in contact with the self-locking part and separated from the movable plate, the pulse flusher is switched to the opening state from the closing state, when the locking assembly enters the locking notch, the switch lever is in the self-locking state, at the moment, the force is not applied to the operating part, and the pulse flusher is still kept in the opening state; under the state that the locking component is positioned in the locking notch, force in the same direction is continuously applied to the operating part, so that the locking component is moved out of the locking notch, then is contacted with the movable plate and is separated from the self-locking part until the switch lever can not move towards the shell, the reset spring is in the maximum compression state, the switch lever is in the transition position, and the pulse flusher is still in the opening state; the operating part is not applied with force, the operating part moves towards the direction away from the shell under the action of the reset spring, the locking assembly keeps in contact with the movable plate and moves towards the outside of the self-locking part through the locking notch under the state of being separated from the self-locking part, the switch lever is in return reset, and the pulse flusher is switched from an opening state to a closing state; under the continuous action of the reset spring, the locking assembly moves to the outside of the side wall of the self-locking part provided with the locking notch and is separated from the movable plate, and the switch lever returns to the closed position.

Further, the locking assembly comprises a pawl and a pawl spring, one end of the pawl spring is in contact with the bottom end of the pawl, and the other end of the pawl spring is used for being in contact with the shell. It is characterized in that; through the setting of pawl spring, make things convenient for the pawl business turn over to lock the breach.

Further, the shape and the size of the pawl are matched with those of the locking notch. The function of which is to enable the pawl to enter the locking notch.

Furthermore, the self-locking portion is provided with a fixed pin shaft for installing the switch lever on the shell, and the movable plate sleeve is arranged on the fixed pin shaft and rotates along with the switch lever around the fixed pin shaft. The locking device has the advantages that the switch lever and the movable plate can rotate around the fixed pin shaft through the arrangement of the fixed pin shaft, the pawl enters the locking notch to be locked through the rotation of the switch lever, and the pawl moving out of the locking notch crosses the locking notch to move out of the side wall of the self-locking portion provided with the locking notch through the rotation of the movable plate.

Furthermore, the surface of the movable plate, which is in contact with the pawl, is located outside the self-locking portion, and the side wall, where the top end of the pawl is located, is located in the range of the projection of the side wall of the movable plate along the normal direction of the side wall of the movable plate and is also located in the range of the projection of the side wall of the self-locking portion along the normal direction of the side wall of the self-locking portion. The pawl can be contacted with the movable plate and the self-locking part, and when the pawl is contacted with the movable plate, the pawl is separated from the self-locking part.

Furthermore, a limiting pin shaft is arranged on the self-locking portion, a limiting groove used for limiting the rotation angle of the movable plate around the fixed pin shaft is arranged on the movable plate, the limiting pin shaft is arranged in the limiting groove, and the extending path of the limiting groove is arc-shaped. The side walls of the head and the tail of the limit groove are closed. The limiting pin shaft is arranged, when the switch lever rotates, the limiting pin shaft rotates around the fixed pin shaft along with the switch lever, and the movable plate is driven to move after the limiting pin shaft contacts the inner wall of the limiting groove, so that the movable plate rotates along with the rotation of the switch lever.

Furthermore, the movable plate can rotate around the fixed pin shaft within the range, and the end view angle of the movable plate comprises a state that the movable plate completely covers the locking notch and a state that the movable plate is completely positioned outside the locking notch. The movable plate is positioned outside the locking notch, so that the pawl can enter the locking notch; when the movable plate completely covers the locking notch, the pawl can cross the locking notch in a state where the movable plate is in contact.

Furthermore, the pawl and the locking notch are in the shape of a right triangle on the end face of the movable plate, the cross section of the locking notch is gradually enlarged towards the outer direction of the self-locking part, the inclined edge of the locking notch is positioned on one side towards the operating part, and one right-angle side of the locking notch is positioned on one side far away from the operating part. The locking device has the advantages that through the arrangement of the pawl and the shape of the locking notch, the right-angle side can play a role in locking the pawl, the reset spring is prevented from pushing the switch lever to rotate, and meanwhile, the pawl can be conveniently moved out of the locking notch along the plane where the bevel edge is located.

Furthermore, the vertex angle of the pawl and the vertex angle of the movable plate, which is contacted with the plane where the pawl inclined plate is located in the process that the switch lever is switched from the locking position to the transition position, are provided with chamfers. The function is that the pawl is convenient to move to the movable plate from the locking notch.

In a second aspect, the pulse flusher comprises a shell and further comprises the pulse flusher switch self-locking device, the locking assembly comprises a pawl and a pawl spring, one end of the pawl spring is in contact with the bottom end of the pawl, a guide rod is arranged on the bottom end of the pawl, the pawl spring sleeve is arranged outside the guide rod, an installation part is arranged on the shell, a cavity for the pawl to move and a through hole only allowing the guide rod to move along the self-axis direction are formed in the installation part, one end of the pawl spring is in contact with the bottom end of the pawl, the other end of the pawl spring is in end face contact with the through hole, the pawl faces the pawl, the head of a supporting rod is arranged on the tail portion of the supporting rod, a clamp spring is arranged in an annular groove, the outer diameter of the clamp spring is larger than that of the supporting rod, and the clamp spring is located outside the installation part. The ratchet spring support device has the functions that the ratchet spring can be supported through the arrangement of the mounting piece; through the setting of jump ring, can avoid the pawl outwards to move outside popping out the casing under the promotion of pawl spring.

The utility model discloses beneficial effect who has:

1. through the arrangement of the switch lever and the locking assembly, the position of the switch lever can be locked when the pulse flusher is in an open state by the switch lever, so that the pulse flusher is locked in the open state, and the use is convenient;

2. through the setting of the fixed pin shaft, the switch lever and the movable plate can rotate around the fixed pin shaft, the pawl enters the locking notch to be locked through the rotation of the switch lever, and the pawl moving out of the locking notch crosses the locking notch to move out of the side wall of the self-locking part provided with the locking notch through the rotation of the movable plate.

3. Through the setting of spacing round pin axle, when the switch thick stick is at the pivoted in-process, spacing round pin axle rotates around fixed pin axle along with the switch thick stick, and spacing round pin axle drives the fly leaf and removes behind the inner wall of spacing groove to make the fly leaf rotate along with the rotation of switch thick stick.

Drawings

FIG. 1 is a schematic perspective view of a self-locking device;

FIG. 2 is a schematic view of the switch lever in a closed position;

FIG. 3 is a schematic view of the switch lever in the locked position;

FIG. 4 is a schematic diagram of the switch lever in the transition position;

FIG. 5 is a schematic view of the switch lever in a return position;

fig. 6 is an enlarged schematic view of a portion a in fig. 4.

The reference numerals are explained below: 1. a housing; 2. a switch lever; 3. an operation section; 4. an auto-lock portion; 5. a return spring; 6. a locking assembly; 7. locking the notch; 8. a movable plate; 9. a pawl; 10. a pawl spring; 11. fixing a pin shaft; 12. a limiting pin shaft; 13. a limiting groove; 14. a guide bar; 15. a mounting member; 16. and a clamp spring.

Detailed Description

The present invention will be described in further detail with reference to the following examples and drawings, but the present invention is not limited thereto.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and the terms are only for convenience of description of the present invention and simplifying the description, but do not indicate or imply that the device or element to which the term refers must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should be further noted that, unless otherwise explicitly specified or limited, the terms "disposed," "opened," "installed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

In a first aspect, a pulse flusher switch self-locking device, as shown in fig. 1, includes a switch lever 2 for being disposed on a housing 1 of a pulse flusher to control a switch of the pulse flusher, the switch lever 2 includes an operation portion 3 for contacting with an external force driving the switch lever 2 to move, the switch lever 2 includes a self-locking portion 4, one surface of the switch lever 2 facing the housing 1 is provided with a return spring 5, and further includes a locking assembly 6 for being disposed on the housing 1 of the pulse flusher, the self-locking portion 4 is provided with a locking notch 7 for allowing the locking assembly 6 to enter, the self-locking portion 4 is further provided with a movable plate 8, the switch lever 2 has a closing position for allowing the locking assembly 6 to be disposed outside the self-locking portion 4 and the movable plate 8, a locking position for allowing the locking assembly 6 to be disposed inside the locking notch 7, a transition position for allowing the locking assembly 6 to be in contact with the movable plate 8 and be separated from the self-locking portion 4 and allowing the return spring 5 to be in a maximum compression state, and a return position for allowing the locking assembly 6 to be in a return position in a return process of a self-locking portion. The pulse flusher has the effects that through the arrangement of the switch lever 2 and the locking component 6, when the operating part 3 of the switch lever 2 is not stressed, the locking component 6 is positioned outside the side walls of the movable plate 8 and the self-locking part 4, the switch lever 2 is in a closed position, and the pulse flusher is in a closed state; when the operating part 3 of the switch lever 2 is just stressed, the locking component 6 moves towards the locking notch 7 under the condition of keeping contact with the self-locking part 4 and being separated from the movable plate 8, the pulse flusher is switched from the closed state to the open state, when the locking component 6 enters the locking notch 7, the switch lever is in the self-locking state, no force is applied to the operating part 3 at the moment, and the pulse flusher still keeps the open state; when the locking component 6 is positioned in the locking notch 7, force in the same direction is continuously applied to the operating part 3, so that the locking component 6 is moved out of the locking notch 7, then is contacted with the movable plate 8 and is separated from the self-locking part 4 until the switch lever 2 can not move towards the shell 1, the reset spring 5 is in the maximum compression state, the switch lever is in the transition position, and the pulse flusher still keeps the opening state; the operating part 3 is not applied with force, under the action of the return spring 5, the operating part 3 moves towards the direction away from the shell 1, the locking component 6 keeps in contact with the movable plate 8 and moves towards the outside of the self-locking part 4 through the locking notch 7 under the state of being separated from the self-locking part 4, the switch lever 2 is in return reset, and the pulse flusher is switched from the opening state to the closing state; under the continuous action of the return spring 5, the locking assembly 6 moves out of the side wall of the self-locking portion 4 provided with the locking notch 7 and is separated from the movable plate 8, and the switch lever 2 returns to the closed position.

Specifically, as shown in fig. 1, the locking assembly 6 includes a pawl 9 and a pawl spring 10, one end of the pawl spring 10 is in contact with a bottom end of the pawl 9, and the other end of the pawl spring 10 is used for being in contact with the housing 1. It is characterized in that; the pawl 9 is convenient to move in and out of the locking notch 7 through the arrangement of the pawl spring 10.

Specifically, as shown in fig. 1, the shape and size of the pawl 9 are matched with those of the locking notch 7. The function of which is to allow the pawl 9 to enter the locking notch 7.

Specifically, as shown in fig. 1, the self-locking portion 4 is provided with a fixed pin 11 for mounting the switch lever 2 on the housing 1, and the movable plate 8 is sleeved on the fixed pin 11 and rotates along with the switch lever 2 rotating around the fixed pin 11. The locking device has the effects that the switch lever 2 and the movable plate 8 can rotate around the fixed pin shaft 11 through the arrangement of the fixed pin shaft 11, the pawl 9 enters the locking notch 7 to be locked through the rotation of the switch lever 2, and the pawl 9 moved out of the locking notch 7 crosses the locking notch 7 to move out of the side wall of the self-locking part 4, which is provided with the locking notch 7, through the rotation of the movable plate 8.

Specifically, as shown in fig. 1, a surface of the movable plate 8, which is in contact with the pawl 9, is located outside the self-locking portion 4, and a side wall at which a top end of the pawl 9 is located within a range of a projection of a side wall of the movable plate 8 along a normal direction of the side wall and is also located within a range of a projection of a side wall of the self-locking portion 4 along the normal direction of the side wall. The function is that the pawl 9 can be contacted with both the movable plate 8 and the self-locking portion 4, and when the pawl 9 is contacted with the movable plate 8, the pawl 9 is separated from the self-locking portion 4.

Specifically, as shown in fig. 1, the self-locking portion 4 is provided with a limiting pin 12, the movable plate 8 is provided with a limiting groove 13 for limiting a rotation angle of the movable plate 8 around the fixed pin 11, the limiting pin 12 is disposed in the limiting groove 13, and an extending path of the limiting groove 13 is arc-shaped. The side walls of the head end and the tail end of the limiting groove 13 are closed. The effect of the device is that, through the arrangement of the limit pin 12, when the switch lever 2 rotates, the limit pin 12 rotates around the fixed pin 11 along with the switch lever 2, and the limit pin 12 drives the movable plate 8 to move after contacting the inner wall of the limit groove 13, so that the movable plate 8 rotates along with the rotation of the switch lever 2. Through the arrangement of the limiting groove 13 and the limiting pin 12, the movable plate 8 can be prevented from continuing to rotate towards the original direction after rotating to cover the locking notch 7.

Specifically, as shown in fig. 2 and 4, the movable plate 8 includes, in a view of an end surface of the movable plate 8, a state in which the movable plate 8 completely covers the locking notch 7 and a state in which the movable plate 8 completely lies outside the locking notch 7 within a range in which the movable plate 8 itself rotates around the fixed pin 11. The function of the locking device is that when the movable plate 8 is completely positioned outside the locking notch 7, the pawl 9 can enter the locking notch 7; when the movable plate 8 completely covers the locking notch 7, the pawl 9 can cross the locking notch 7 in a state where the movable plate 8 is in contact.

Specifically, as shown in fig. 1, the pawl 9 and the locking notch 7 are in the shape of a right triangle at the end surface of the movable plate 8, the cross section of the locking notch 7 is gradually enlarged toward the outside of the lock portion 4, the oblique side of the locking notch 7 is located on the side facing the operation portion 3, and one of the right-angled sides of the locking notch 7 is located on the side away from the operation portion 3. The effect is that, through the setting of pawl 9 and locking notch 7 shape, the right-angle side can play the locking effect to pawl 9, avoids reset spring 5 to promote the switch lever and rotates, makes things convenient for pawl 9 to shift out locking notch 7 along the hypotenuse place face simultaneously.

Specifically, as shown in fig. 6, the top corner of the pawl 9 and the top corner of the movable plate 8, which is in contact with the inclined plate of the pawl 9 during the switching of the switch lever 2 from the lock position to the transition position, are chamfered. Which serves to facilitate the movement of the pawl 9 from the locking notch 7 to the movable plate 8.

In a second aspect, a pulse flusher, as shown in fig. 4, includes casing 1, still includes foretell pulse flusher switch self-lock device, locking assembly 6 includes pawl 9 and pawl spring 10, pawl spring 10 one end contacts with the bottom of pawl 9, be equipped with guide bar 14 on the bottom of pawl 9, pawl spring 10 cover is established outside guide bar 14, be equipped with installed part 15 on casing 1, be equipped with the cavity that supplies pawl 9 to remove and only supply guide bar 14 to move along self axle direction's through-hole on the installed part 15, pawl spring 10 one end contacts with the bottom of pawl 9, the other end of pawl spring 10 and the end face contact of through-hole towards pawl 9, the head of bracing piece is located to pawl 9, the afterbody of bracing piece is equipped with annular groove, be equipped with jump ring 16 in the annular groove, the external diameter of jump ring 16 is greater than the external diameter of bracing piece, jump ring 16 is located outside installed part 15. The function of the ratchet spring 10 can be supported by the installation piece 15; through the arrangement of the snap spring 16, the pawl 9 can be prevented from moving outwards to the outside of the ejection housing 1 under the urging of the pawl spring 10.

The working principle of the embodiment is explained as follows: the self-locking part 4 is arranged at the head part of the switch lever 2, the middle area of one side of the operation part 3 facing the shell 1 is provided with a trigger rod, and when the trigger rod moves to a certain area in the shell 1, the switch in the shell 1 is triggered to start the pulse flusher.

As shown in fig. 2, when the switching lever is in the closed position, due to the thrust of the return spring 5, the limit pin 12 is located at the lower end of the limit groove 13, then the application of force pushes the operating portion 3 to move toward the housing 1, the switching lever 2 drives the limit pin 12 to move, the limit pin 12 moves upward in the limit groove 13, the pawl 9 moves downward along the side wall of the self-locking portion 4 after contacting with the side wall of the self-locking portion 4, when the pawl 9 contacts with the movable plate 8, the pawl 9 pushes the movable plate 8 to rotate downward, the limit pin 12 moves downward in the limit groove 13, as shown in fig. 3, the pawl 9 falls into the locking notch 7 under the pushing of the pawl spring 10, the limit pin 12 is located at the upper end of the limit groove 13, the upper end of the movable plate 8 is located at the lower end of the locking notch 7, the switching lever 2 is in the locking position, at this time, no application of force is applied to the operating portion 3, the switching lever remains stationary, and the pulse flusher remains in the open state; as shown in fig. 4, when the pulse flusher needs to be closed, the operating part 3 is continuously forced to push the operating part 3 to move towards the housing 1, the pawl 9 moves out of the locking notch 7 along the plane of the oblique edge of the locking notch 7 to the movable plate 8, the switch lever 2 is tightly attached to the housing 1, the return spring 5 is in the maximum compression state, the switch lever 2 is in the transition position, then no force is applied to the operating part 3, the switch lever 2 rotates the operating part 3 in the direction away from the housing 1 under the pushing of the compression spring, the switch lever 2 is in the return position, as shown in fig. 5, after the limit pin 12 moves downwards in the limit groove 13 to the lower end of the limit groove 13, the switch lever 2 continuously rotates in the direction that the operating part 3 is away from the housing 1, the pawl 9 passes through the area of the locking notch 7 on the movable plate 8, falls on the side wall of the self-locking part 4, finally falls outside the self-locking part 4, and the switch lever 2 returns to the closed position.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and the technical essence of the present invention is that within the spirit and principle of the present invention, any simple modification, equivalent replacement, and improvement made to the above embodiments are all within the protection scope of the technical solution of the present invention.

Claims

1. A pulse flusher switch self-locking device comprises a switch lever (2) which is arranged on a shell (1) of a pulse flusher to control the switch of the pulse flusher, the switch lever (2) comprises an operation part (3) which is used for being in contact with external force for driving the switch lever (2) to move, and the pulse flusher switch self-locking device is characterized in that: switch thick stick (2) are including self-locking portion (4), switch thick stick (2) are equipped with reset spring (5) towards casing (1) one side, still including being used for setting up locking subassembly (6) on pulse flusher casing (1), be equipped with locking breach (7) that are used for supplying locking subassembly (6) to get into on self-locking portion (4), still be equipped with fly leaf (8) on self-locking portion (4), locking subassembly (6) are along with the motion business turn over locking breach (7) of switch thick stick (2) and pass through locking breach (7) under the state with fly leaf (8) contact and with self-locking portion (4) separation.

2. The pulse flusher switch self-locking device according to claim 1, characterized in that: the switch lever (2) is provided with a closing position enabling the locking component (6) to be positioned outside the movable plate (8) and the self-locking part (4) provided with the locking notch (7), a locking position enabling the locking component (6) to be positioned in the locking notch (7) and outside the movable plate (8), a transition position enabling the locking component (6) to be in contact with the movable plate (8) and separated from the self-locking part (4) and enabling the reset spring (5) to be in the maximum compression state, and a return position enabling the locking component (6) to be in contact with the movable plate (8) and separated from the self-locking part (4) and enabling the reset spring (5) to be in the process of returning to the original length of the reset spring in the using process of the pulse flusher.

3. The pulse flusher switch self-locking device according to claim 2, characterized in that: the locking assembly (6) comprises a pawl (9) and a pawl spring (10), one end of the pawl spring (10) is in contact with the bottom end of the pawl (9), and the other end of the pawl spring (10) is used for being in contact with the shell (1).

4. The pulse flusher switch self-locking device according to claim 3, characterized in that: the self-locking part (4) is provided with a fixed pin shaft (11) used for installing the switch lever (2) on the shell (1), and the movable plate (8) is sleeved on the fixed pin shaft (11) and rotates along with the switch lever (2) rotating around the fixed pin shaft (11).

5. The pulse flusher switch self-locking device according to claim 4, characterized in that: the side wall of the top end of the pawl (9) is located in the range of the projection of the side wall of the movable plate (8) along the normal direction of the side wall, and is also located in the range of the projection of the side wall of the self-locking part (4) along the normal direction of the side wall.

6. The pulse flusher switch self-locking device according to claim 5, characterized in that: the self-locking part (4) is provided with a limiting pin shaft (12), the movable plate (8) is provided with a limiting groove (13) used for limiting the rotation angle of the movable plate (8) around the fixed pin shaft (11), the limiting pin shaft (12) is arranged in the limiting groove (13), and the extending path of the limiting groove (13) is arc-shaped.

7. The pulse flusher switch self-locking device according to claim 6, characterized in that: the movable plate (8) rotates around the fixed pin shaft (11) in the range, and the end face view angle of the movable plate (8) comprises a state that the movable plate (8) completely covers the locking notch (7) and a state that the movable plate (8) is completely positioned outside the locking notch (7).

8. The pulse flusher switch self-locking device according to claim 7, characterized in that: the end face shapes of the pawl (9) and the locking notch (7) on the movable plate (8) are right-angled triangles, the section of the locking notch (7) is gradually enlarged towards the outer direction of the self-locking part (4), the inclined edge of the locking notch (7) is positioned on one side towards the operating part (3), and one of the right-angled edges of the locking notch (7) is positioned on one side far away from the operating part (3).

9. The pulse flusher switch self-locking device according to claim 8, characterized in that: and chamfers are arranged at the vertex angle of the pawl (9) and the vertex angle of the movable plate (8) which is in contact with the plane where the inclined plate of the pawl (9) is located in the process that the switch lever (2) is converted from the locking position to the transition position.

10. A pulse irrigator comprising a housing (1) characterized in that: the self-locking device of the pulse flusher switch further comprises any one of claims 1 to 9, the locking assembly (6) comprises a pawl (9) and a pawl spring (10), one end of the pawl spring (10) is in contact with the bottom end of the pawl (9), a guide rod (14) is arranged at the bottom end of the pawl (9), the pawl spring (10) is sleeved outside the guide rod (14), an installation part (15) is arranged on the shell (1), a cavity for the pawl (9) to move and a through hole for the guide rod (14) to move along the self-axis direction are formed in the installation part (15), one end of the pawl spring (10) is in contact with the bottom end of the pawl (9), the other end of the pawl spring (10) is in contact with the through hole towards the end face of the pawl (9), the pawl (9) is arranged at the head of the support rod, an annular groove is formed in the tail of the support rod, a clamp spring (16) is arranged in the annular groove, and the clamp spring (16) is located outside the installation part (15).