A pulse flushing gun switch self-locking-unlocking device and method

Abstract

The present invention discloses a pulse flushing gun switch self-locking-unlocking device and method. In the first aspect, a pulse flushing gun switch self-locking-unlocking device is used in the shell of a pulse flusher. The shell is provided with a push rod, and also includes a rotating plate and a locking plate hinged on the shell. The push rod is provided with a boss, and the locking plate is provided with a clamping groove. The rotating plate is provided with a clamping protrusion for clamping into the clamping groove and a pushing protrusion for pushing the locking plate to rotate around the hinge between the locking plate and the shell so that the clamping groove faces the clamping protrusion. When the clamping protrusion is clamped in the clamping groove, the hinge between the rotating plate and the shell, the hinge between the locking plate and the shell, and the position of the clamping groove form a triangle. In the second aspect, a pulse flushing gun switch self-locking-unlocking method. The present invention can lock the pulse flushing gun in a working state of continuously spraying pulse water flow. It is easy to use, has a small number of parts, and is simple to install.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a pulse flushing gun switch self-locking-unlocking device and method. Background Art

[0002] In the medical field, pulse flushing guns are often used to clean wound tissue. The pulse flushing gun sprays a pulse water flow with a certain pressure to create a vibration effect, which can bounce bacteria, foreign matter, etc. off the wound and tissue, thereby achieving the purpose of thorough debridement.

[0003] The working mode of the existing pulse flushing gun is generally that after pressing the switch with hand, the pulse flushing gun will continue to spray out pulse water flow, and when the hand is released, the pulse water flow will stop spraying. However, in actual usage scenarios, medical staff often need to use pulse water flow to clean the wound while operating other equipment with both hands. When the switch on the pulse flushing gun is released, the pulse water flow cannot continue to be sprayed to clean the wound, which is inconvenient to use.

[0004] The existing pulse flushing gun is provided with a locking switch outside the shell in addition to the water spray switch to lock the switch state of the pulse flushing gun. When operating the pulse flushing gun, medical staff need to operate the water spray switch and the locking switch separately to realize the self-locking function of the pulse flushing gun, which is not convenient for one-handed operation and inconvenient to use. In addition, the shell of the existing pulse flushing gun usually adopts elastic structures such as cylindrical springs, spring sheets, and plastic sheets to assist in realizing the self-locking and unlocking functions. When the elastic structure in the shell fails to achieve the expected elastic effect due to fatigue, it will affect the realization of the self-locking and unlocking functions, thereby reducing the reliability of the self-locking and unlocking device. Summary of the invention

[0005] The object of the present invention is to provide a pulse flushing gun switch self-locking-unlocking device and method, which can lock the pulse flushing gun in a working state of continuously spraying pulse water flow, is easy to use, has a small number of parts, and is simple to install.

[0006] In order to solve the above technical problems, the present invention adopts the following solutions:

[0007] In the first aspect, a pulse flushing gun switch self-locking-unlocking device is used in the shell of a pulse flusher, wherein the shell is penetrated by a push rod which can be moved in the shell to control the water spraying action switch of the pulse flushing gun, a switch handle is provided outside the shell, the switch handle is connected to the push rod, a reset spring is provided between the switch handle and the shell, and also includes a rotating piece and a locking piece hinged on the shell, a section of the push rod located in the shell is provided with a boss for pushing the rotating piece to make the rotating piece swing around the hinge between the rotating piece and the shell, the push rod and the rotating piece form a connecting rod mechanism, a locking groove is provided on the locking piece, a locking protrusion for clamping into the locking groove and a pushing protrusion for pushing the locking piece to rotate around the hinge between the locking piece and the shell to make the locking groove toward the locking protrusion, when the rotating piece is driven to swing and the locking protrusion is clamped in the locking groove, the rotating piece can only swing in the direction opposite to the original swinging direction. When the engaging protrusion is in the engaging groove, the distance between one end of the engaging groove and the first pin is smaller than the distance between the engaging protrusion and the first pin; the distance between the other end of the engaging groove and the first pin is larger than the distance between the engaging protrusion and the first pin. If the rotating plate is driven to continue to swing in the original swinging direction, the rotating plate will drive the locking plate to rotate so that the end of the engaging groove farther from the first pin moves toward the rotating plate. Since the side wall of the engaging groove farther from the first pin abuts against the outer edge of the engaging protrusion, and the distance between the inner end of the engaging groove and the second pin is smaller than the distance between the outer end of the engaging groove and the second pin, the end of the engaging groove farther from the first pin cannot move toward the rotating plate, so that the rotating plate cannot continue to swing in the original swinging direction. The locking plate and the engaging protrusion constitute a ratchet pawl mechanism. Its function is that, through the setting of the rotating plate and the locking plate, the pushing protrusion of the rotating plate can push the locking plate to rotate to the corresponding angle, and then through the clamping matching relationship between the clamping protrusion and the clamping groove and the matching relationship to limit the swinging direction of the rotating plate, the clamping protrusion fixes the locking plate, thereby locking the rotation action of the rotating plate and the locking plate, thereby fixing the position of the push rod, and thus can achieve locking of the working state of the pulse flushing gun.

[0008] Furthermore, a first pin is provided at the hinged connection between the rotating piece and the housing, and a second pin is provided at the hinged connection between the locking piece and the housing. The first pin is arranged in parallel with the second pin. When the clamping protrusion is located in the clamping groove, the top end of the clamping protrusion is located outside the plane area surrounded by the first pin and the second pin and in the area extending normally away from the side of the push rod located outside the housing. Its function is that when the clamping protrusion is located in the clamping groove, the position of the clamping protrusion is arranged so that the direction of the combined force of the first pin and the second pin on the clamping protrusion is opposite to the direction of the combined force of the push rod moving toward the outside of the housing on the clamping protrusion, so that the force of the entire self-locking-unlocking device is balanced, and the position of the push rod is locked.

[0009] Furthermore, the rotating plate includes an active plate that contacts the boss and a driven plate that contacts the locking plate, respectively. The active plate and the driven plate are fixedly connected, including being clamped, bonded, welded, riveted, bolted, or integrally formed. A driven plate, an active plate, and a push rod are sequentially arranged in the housing along the axial direction of the first pin shaft away from the connection between the first pin shaft and the housing. The active plate and the driven plate are both cylindrical. Its function is to make the pushing action of the push rod on the active plate and the action process between the driven plate and the locking plate not affect each other through the layered structure of the active plate and the driven plate, so that these two actions are completed in the area where the rotating plate moves, and the area where the rotating plate moves is reduced as much as possible, saving the space occupied by the rotating plate in the housing of the pulse flushing gun. At the same time, by fixing the active plate and the driven plate to form a rotating plate design, the active plate and the driven plate can swing synchronously, which is convenient for installing the rotating plate in the housing and is easy to install.

[0010] Furthermore, the locking piece is symmetrical about the second pin axis, and a transition notch is provided on the outer edge of the driven piece for the locking piece to move when rotating around the second pin axis. A clamping protrusion is provided at one end of the transition notch away from the push rod and located outside the housing, and a pushing protrusion is provided at one end of the transition notch near the push rod and located outside the housing, and the distance between the pushing protrusion and the first pin axis is greater than the distance between the clamping protrusion and the first pin axis. Its function is that, through the design of the central symmetric shape of the locking piece, the rotation angle of the locking piece when switching between the locked state and the unlocked state each time is less than 180 degrees, the rotation stroke is small, and the state switching speed is fast.

[0011] Furthermore, the outer contour of the locking piece is in the shape of a quadrangular prism, and the two opposite side walls of the locking piece are provided with a snap-on groove, and the other two opposite side surfaces of the locking piece are provided with a first arc surface that is concave inwards, and the driven piece is provided with a second arc surface that is convex outwards, and the center of the second arc surface is located on the axis of the first pin shaft, and the radius of the first arc surface and the second arc surface are the same, and there is a state of mutual clearance fit between the first arc surface and the second arc surface, and the snap-on protrusion is provided at the junction of the second arc surface and the transition notch. Its function is to prevent the locking piece from rotating arbitrarily and getting stuck on any protrusion when the pulse flushing gun is not in a working state through the arrangement of the first arc surface and the second arc surface, thereby affecting the normal use of the pulse flushing gun.

[0012] Furthermore, the pushing protrusion is in an arc shape with the first pin as the center, and the pushing protrusion is provided with a positioning micro-protrusion toward the first pin for snapping into the snap-in groove, and the distance between the positioning micro-protrusion and the first pin is greater than the distance between the second pin and the first pin;

[0013] Furthermore, when the locking plate is rotated to the state where the center of any one of the first arc surfaces coincides with the center of the second arc surface, the distance between the positioning micro-protrusion and the first pin shaft is greater than the distance between the inner end of the snap-in groove and the first pin shaft, and the distance between the positioning micro-protrusion and the first pin shaft is less than the distance between the end of the snap-in groove away from the first pin shaft and the first pin shaft; its function is to enable the positioning micro-protrusion to contact the end of the snap-in groove away from the first pin shaft through the setting of the position of the positioning micro-protrusion, thereby pushing the locking plate to rotate, so that the positioning micro-protrusion is stuck in the snap-in groove.

[0014] Further, when the positioning micro-convex is stuck in the clamping groove, the positioning micro-convex is located on the side of the push rod located outside the housing, which is bounded by the line between the first pin and the second pin. The second pin is located outside the plane area surrounded by the first pin and the positioning micro-convex, in the area extending normally away from the side of the push rod located outside the housing, and the clamping groove facing away from the positioning micro-convex directly faces the clamping protrusion. Its function is that, since the positioning micro-convex gradually pushes the locking plate to rotate under the trend of approaching the second pin after entering the clamping groove, when the positioning micro-convex is stuck in the clamping groove, the positioning micro-convex is fixed by the locking plate and cannot continue to approach the second pin, and the locking plate locks the original swinging trend of the rotating plate. At the same time, the boss is located at the terminal of the guide groove and cannot continue to move in the original direction, which together prevents the push rod from continuing to push the rotating plate to swing along the original forward direction, so as to fix the angle of the locking plate and facilitate the clamping protrusion to directly enter the relative clamping groove when the push rod is moved in the opposite direction.

[0015] Furthermore, the active plate is provided with a guide groove for the boss to move, the boss is arranged in the guide groove, the boss is cylindrical, and the width of the guide groove is the same as the outer diameter of the boss. Its function is that, through the setting of the position of the boss and the guide groove, when the push rod moves, the boss pushes the inner wall of the guide groove to push the rotating plate to swing.

[0016] Furthermore, the active sheet is in an arc shape, the guide groove is in an L shape, and both sides of the guide groove extend from the arc surface of the active sheet toward the first pin shaft and intersect adjacent to the first pin shaft.

[0017] Furthermore, each corner of the clamping groove, the clamping protrusion and the pushing protrusion is rounded, so as to facilitate the clamping protrusion and the pushing protrusion to enter and exit the clamping groove.

[0018] Furthermore, the push rod, the locking plate and the rotating plate are all made of rigid materials, which has the effect of not using an elastic structure to realize the self-locking and unlocking functions of the switch, thereby improving the reliability of the self-locking and unlocking device.

[0019] In a second aspect, a pulse flushing gun switch self-locking-unlocking method is applied to the above-mentioned pulse flushing gun switch self-locking-unlocking device, wherein an L-shaped guide groove is provided on the active sheet, and a boss is provided in the guide groove, comprising the following steps:

[0020] S1. When the pulse flushing gun is not in operation, the second arc surface cooperates with the first arc surface, and the end of the push rod outside the shell is at the farthest position from the shell in the push rod moving stroke;

[0021] S2, when the pulse flushing gun starts to work, the section of the push rod outside the housing is pushed to move into the housing by force, the boss moves in the guide groove, thereby pushing the active plate to swing around the first pin toward the end of the push rod outside the housing, the second arc surface moves out of the first arc surface, and the push protrusion moves toward the locking plate until it abuts against the end surface of the locking plate's clamping groove toward the push protrusion;

[0022] S3, in the process of preparing to lock the working state of the pulse flushing gun, after the push protrusion moves to the end surface of the clamping groove, continue to push the push rod into the housing, when the boss is located at the terminal end of the guide groove, the push rod is limited by the terminal end of the guide groove and no longer moves, at this time, the locking piece rotates around the second pin shaft until the positioning micro-convex is clamped into the clamping groove, and at the same time, the other clamping groove faces the clamping protrusion;

[0023] S4. In the process of locking the working state of the pulse flushing gun, the push rod moves toward the outside of the housing under the action of the reset spring, and the boss moves in the guide groove to push the active plate to swing around the first pin toward the end of the push rod outside the housing, and the engaging protrusion is engaged in the engaging groove on the locking plate facing the engaging protrusion, and the top end of the engaging protrusion is located at the bottom end of the engaging groove, which prevents the push rod from continuing to move toward the outside of the housing, so that the pulse flushing gun is in a self-locking state;

[0024] S5. When the self-locking state of the pulse flushing gun needs to be released, the push rod is moved toward the inside of the housing, and the boss moves in the guide groove to push the active plate to swing around the first pin toward the end of the push rod outside the housing, so that the engaging protrusion moves out of the engaging groove, and the pushing protrusion pushes the first arc surface toward the pushing protrusion, so that the locking plate rotates in the transition notch until the first arc surface facing away from the pushing protrusion faces the engaging protrusion;

[0025] S6. When the pulse flushing gun needs to be kept unlocked, after the first arc surface facing away from the pushing protrusion faces the locking protrusion, the push rod moves toward the outside of the shell under the action of the reset spring, and the boss moves in the guide groove to push the active plate to swing around the first pin shaft toward the end of the push rod outside the shell. After the locking protrusion contacts the first arc surface, the push rod continues to move in the original direction. The locking protrusion pushes the locking plate to rotate until the clearance between the first arc surface and the second arc surface is matched, so that the pulse flushing gun is in a non-working state.

[0026] The present invention has the beneficial effects:

[0027] 1. Through the arrangement of the rotating piece and the locking piece, the rotating piece can push the locking piece to rotate to the corresponding angle, and then the locking protrusion and the locking groove are matched, and the hinge of the rotating piece and the housing, the hinge of the locking piece and the housing, and the position of the locking groove form a triangle. According to the stability of the triangle, the rotation of the rotating piece and the locking piece is locked, so as to fix the position of the push rod, so as to lock the working state of the pulse flushing gun;

[0028] 2. When the clamping protrusion is located in the clamping groove, the position of the clamping protrusion is set so that the direction of the combined force of the first pin shaft and the second pin shaft on the clamping protrusion is opposite to the direction of the combined force of the push rod moving out of the housing on the clamping protrusion, so that the force of the entire self-locking-unlocking device is balanced, thereby locking the position of the push rod;

[0029] 3. Through the setting of the layered structure of the active plate and the driven plate, the pushing effect of the push rod on the active plate and the action process between the driven plate and the locking plate do not affect each other, so that these two actions are completed within the area where the rotating plate moves, which minimizes the area where the rotating plate moves, and saves the space occupied by the rotating plate in the pulse flushing gun housing. At the same time, through the design of fixedly connecting the active plate and the driven plate into a rotating plate, the active plate and the driven plate can swing synchronously, which is convenient for installing the rotating plate in the housing and is easy to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the three-dimensional explosion structure of Example 1;

[0031] Figure 2 This is a schematic structural diagram of a portion of the active sheet hiding one side of the guide groove in step S1 of Example 1;

[0032] Figure 3 This is a schematic structural diagram of a portion of the active sheet hiding one side of the guide groove in step S2 of Example 1;

[0033] Figure 4 It is a schematic structural diagram of a portion of the active sheet hiding one side of the guide groove in step S3 of Example 1;

[0034] Figure 5 This is a schematic structural diagram of a portion of the active sheet hiding one side of the guide groove in step S4 of Example 1;

[0035] Figure 6 This is a schematic structural diagram of a portion of the active sheet hiding one side of the guide groove in step S5 of Example 1;

[0036] Figure 7 This is a schematic structural diagram of a portion of the active sheet hiding one side of the guide groove in step S6 of Example 1;

[0037] Figure 8 It is a schematic diagram of the three-dimensional structure of the rotating piece in Example 2.

[0038] The description of the accompanying drawings is as follows: 1. Shell; 2. Push rod; 3. Rotating plate; 4. Locking plate; 5. Boss; 6. Snap-in groove; 7. Snap-in protrusion; 8. Push protrusion; 9. First pin shaft; 10. Second pin shaft; 11. Active plate; 12. Driven plate; 13. Transition notch; 14. First arc surface; 15. Second arc surface; 16. Positioning micro-protrusion; 17. Guide groove; 18. Switch handle; 19. Reset spring; 20. Protrusion; 21. Mounting port; 22. Power supply plate mounting position. DETAILED DESCRIPTION

[0039] The present invention will be further described in detail below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0040] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0041] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed", "opened", "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Example 1

[0043] First, as Figure 1As shown, a pulse flushing gun switch self-locking-unlocking device is used in a housing 1 of a pulse flusher, the housing 1 is penetrated by a push rod 2 which can be moved in the housing 1 to control the water spraying action switch of the pulse flushing gun, a switch handle 18 is provided outside the housing 1, the switch handle 18 is fixedly connected to the push rod 2, a return spring 19 is provided between the switch handle 18 and the housing 1, a cylinder for installing the return spring 19 is provided on the side wall of the switch handle 18 facing the housing 1, the switch handle 18 is hinged to the housing 1, the return spring 19 is a compression spring, the return spring 19 is located near the hinge of the switch handle 18 and the housing 1, and the push rod 2 is located in an arc shape at the switch handle 18 away from the switch handle 1 8 is hinged with the housing 1, and also includes a rotating piece 3 and a locking piece 4 hinged on the housing 1. The push rod 2 is provided with a boss 5 on the section located in the housing 1 for pushing the rotating piece 3 so that the rotating piece 3 swings around the hinge of the rotating piece 3 and the housing 1. The push rod 2 and the rotating piece 3 form a connecting rod mechanism. The locking piece 4 is provided with a clamping groove 6. The rotating piece 3 is provided with a clamping protrusion 7 for clamping into the clamping groove 6 and a pushing protrusion 8 for pushing the locking piece 4 to rotate around the hinge of the locking piece 4 and the housing 1 so that the clamping groove 6 faces the clamping protrusion 7. When the rotating piece 3 is driven to swing so that the clamping protrusion 7 is clamped in the clamping groove 6, the rotating piece 3 can only swing in the direction opposite to the original swinging direction. When the clamping protrusion 7 is located in the clamping groove 6, the distance between one end of the clamping groove 6 and the first pin 9 is less than the distance between the clamping protrusion 7 and the first pin 9; the distance between the other end of the clamping groove 6 and the first pin 9 is greater than the distance between the clamping protrusion 7 and the first pin 9. If the rotating piece 3 is driven to continue to swing in the original swing direction, the rotating piece 3 will drive the locking piece 4 to rotate so that the end of the clamping groove 6 farther from the first pin 9 moves toward the rotating piece 3. Since the side wall of the clamping groove 6 farther from the first pin 9 abuts against the outer edge of the clamping protrusion 7, and the distance between the inner end of the clamping groove 6 and the second pin 10 is smaller than the distance between the outer end of the clamping groove 6 and the second pin 10, the end of the clamping groove 6 farther from the first pin 9 cannot move toward the rotating piece 3, so that the rotating piece 3 cannot continue to swing in the original swing direction. The locking piece 4 and the clamping protrusion 7 form a ratchet pawl mechanism. The clamping protrusion 7 and the clamping groove 6 are both triangular. Its function is that, through the setting of the rotating piece 3 and the locking piece 4, the rotating piece 3 can push the locking piece 4 to rotate to the corresponding angle, and then through the clamping matching relationship between the clamping protrusion 7 and the clamping groove 6 and the matching relationship to limit the swinging direction of the rotating piece 3, the clamping protrusion 7 fixes the locking piece 4, thereby locking the rotation action of the rotating piece 3 and the locking piece 4, thereby fixing the position of the push rod 2, and thus can achieve locking of the working state of the pulse flushing gun.

[0044] Specifically, Figure 1As shown, the hinged joint of the rotating piece 3 and the housing 1 is provided with a first pin shaft 9, and the hinged joint of the locking piece 4 and the housing 1 is provided with a second pin shaft 10. The first pin shaft 9 and the second pin shaft 10 are arranged in parallel and are both arranged on the housing 1. The rotating piece 3 is provided with a through hole with the same outer diameter as the first pin shaft 9, and the locking piece 4 is provided with a through hole with the same outer diameter as the second pin shaft 10. When the clamping protrusion 7 is located in the clamping groove 6, the top end of the clamping protrusion 7 is located outside the plane area surrounded by the first pin shaft 9 and the second pin shaft 10 and in the area extending normally away from the side of the push rod 2 located outside the housing 1. Its function is that, when the clamping protrusion 7 is located in the clamping groove 6, the position of the clamping protrusion 7 is set so that the direction of the combined force of the first pin shaft 9 and the second pin shaft 10 on the clamping protrusion 7 is opposite to the direction of the combined force of the push rod 2 moving toward the outside of the housing 1 on the clamping protrusion 7, so that the force of the entire self-locking-unlocking device is balanced, and the position of the push rod 2 is locked.

[0045] Specifically, Figure 1 As shown, the rotating piece 3 includes an active piece 11 that contacts the boss 5 and a driven piece 12 that contacts the locking piece 4, the active piece 11 and the driven piece 12 are both fan-shaped and the centers of the active piece 11 and the driven piece 12 are both located at the first pin shaft 9, the active piece 11 is fixedly connected to the driven piece 12, a protruding piece 20 that is vertically arranged with the driven piece 12 is provided on the driven piece 12, the active piece 11 is provided with a mounting opening 21 with the same cross section as the protruding piece 20, and the protruding piece 20 is arranged in the mounting opening 21, and the driven piece 12, the active piece 11, and the push rod 2 are sequentially arranged in the housing 1 along the axial direction of the first pin shaft 9 away from the connection between the first pin shaft 9 and the housing 1. The active piece 11 and the driven piece 12 are both cylindrical. Its function is that, through the layered structure of the active plate 11 and the driven plate 12, the pushing action of the push rod 2 on the active plate 11 and the action process between the driven plate 12 and the locking plate 4 do not affect each other, so that these two actions are completed within the active area of ​​the rotating plate 3, thereby reducing the active area of ​​the rotating plate 3 as much as possible, saving the space occupied by the rotating plate 3 in the pulse flushing gun housing 1, and at the same time, by fixing the active plate 11 and the driven plate 12 to form a rotating plate 3, the active plate 11 and the driven plate 12 can swing synchronously, which is convenient for installing the rotating plate 3 in the housing 1.

[0046] Specifically, Figure 1As shown, the locking piece 4 is symmetrical about the second pin shaft 10, and the outer edge of the driven piece 12 is provided with a transition notch 13 for the locking piece 4 to move when rotating around the second pin shaft 10. The transition notch 13 is in a fan ring shape, and the push protrusion 8 is located at the outer diameter of the transition notch 13. The clamping protrusion 7 is located at the middle section of the side of the transition notch 13. The end of the transition notch 13 away from the push rod 2 and located outside the housing 1 is provided with a clamping protrusion 7, and the end of the transition notch 13 near the push rod 2 and located outside the housing 1 is provided with a push protrusion 8. The distance between the push protrusion 8 and the first pin shaft 9 is greater than the distance between the clamping protrusion 7 and the first pin shaft 9. Its function is that, through the design of the central symmetric shape of the locking piece 4, the rotation angle of the locking piece 4 when switching between the locked state and the unlocked state each time is less than 180°, the rotation stroke is small, and the state switching speed is fast.

[0047] Specifically, Figure 1 As shown, the outer contour of the locking piece 4 is in the shape of a quadrangular prism, and the two opposite side walls of the locking piece 4 are provided with a clamping groove 6, and the other two opposite side surfaces of the locking piece 4 are provided with a first arc surface 14 concave inwardly, and the driven piece 12 is provided with a second arc surface 15 convex outwardly, and the center of the second arc surface 15 is located on the axis of the first pin shaft 9, and the radius of the first arc surface 14 and the second arc surface 15 are the same, and the first arc surface 14 and the second arc surface 15 are in a mutually fitting state, and the clamping protrusion 7 is provided at the junction of the second arc surface 15 and the transition notch 13. Its function is to prevent the locking piece 4 from rotating and getting stuck on any protrusion when the pulse flushing gun is not in a working state through the arrangement of the first arc surface 14 and the second arc surface 15, so as to affect the normal use of the pulse flushing gun.

[0048] Specifically, Figure 1 As shown, the pushing protrusion 8 is in an arc shape with the first pin shaft 9 as the center, and the pushing protrusion 8 is provided with a positioning micro-protrusion 16 for snapping into the snap-in groove 6 in the direction of the first pin shaft 9, and the distance between the positioning micro-protrusion 16 and the first pin shaft 9 is greater than the distance between the second pin shaft 10 and the first pin shaft 9;

[0049] Specifically, Figure 1 As shown, when the locking piece 4 rotates to the state where the center of any one of the first arc surfaces 14 coincides with the center of the second arc surface 15, the distance between the positioning micro-protrusion 16 and the first pin shaft 9 is greater than the distance between the inner end of the snap-in groove 6 and the first pin shaft 9, and the distance between the positioning micro-protrusion 16 and the first pin shaft 9 is less than the distance between the end of the snap-in groove 6 away from the first pin shaft 9 and the first pin shaft 9; its function is to enable the positioning micro-protrusion 16 to contact the end of the snap-in groove 6 away from the first pin shaft 9 through the setting of the position of the positioning micro-protrusion 16, thereby pushing the locking piece 4 to rotate, so that the positioning micro-protrusion 16 is stuck in the snap-in groove 6.

[0050] Specifically, Figure 1As shown, when the positioning micro-protrusion 16 is stuck in the clamping groove 6, the positioning micro-protrusion 16 is located on the side of the push rod 2 located outside the housing, which is bounded by the line between the first pin shaft 9 and the second pin shaft 10. The second pin shaft 10 is located in an area extending normally away from the side of the push rod 2 located outside the housing 1 outside the plane area surrounded by the first pin shaft 9 and the positioning micro-protrusion 16, and the clamping groove 6 facing away from the positioning micro-protrusion 16 directly faces the clamping protrusion 7. Its function is that, after the positioning micro-protrusion 16 enters the engaging groove 6, it gradually pushes the locking piece 4 to rotate under the tendency of approaching the second pin shaft 10. When the positioning micro-protrusion 16 is stuck in the engaging groove 6, the positioning micro-protrusion 16 is fixed by the locking piece 4 and cannot continue to approach the second pin shaft 10. The locking piece 4 locks the original swinging tendency of the rotating piece 3. At the same time, the boss 5 is located at the terminal end of the guide groove 17 and cannot continue to move in the original direction. Together, the push rod 2 cannot continue to push the rotating piece 3 to swing along the original forward direction, which makes it easy to fix the angle of the locking piece 4 and facilitate the engaging protrusion 7 to directly enter the relative engaging groove 6 when the push rod 2 is moved in the opposite direction.

[0051] Specifically, Figure 1 As shown, the active plate 11 is provided with a guide groove 17 for the boss 5 to move, the boss 5 is arranged in the guide groove 17, the boss 5 is cylindrical, and the width of the guide groove 17 is the same as the outer diameter of the boss 5. Its function is that, through the setting of the positions of the boss 5 and the guide groove 17, when the push rod 2 moves, the boss 5 pushes the inner wall of the guide groove 17, thereby pushing the rotating plate 3 to swing.

[0052] Specifically, Figure 1 As shown, the active plate 11 is in an arc shape, the guide groove 17 is in an L shape, and both sides of the guide groove 17 extend from the arc surface of the active plate 11 toward the first pin shaft 9 and intersect adjacent to the first pin shaft 9 .

[0053] Specifically, Figure 1 As shown, each corner of the clamping groove 6, the clamping protrusion 7, and the pushing protrusion 8 is rounded. Its function is to facilitate the clamping protrusion 7 and the pushing protrusion 8 to enter and exit the clamping groove 6.

[0054] Specifically, the push rod 2, the locking piece 4, and the rotating piece 3 are all made of rigid materials. The function is that no elastic structure is used to realize the self-locking and unlocking functions of the switch, thereby improving the reliability of the self-locking and unlocking device.

[0055] In the second aspect, a pulse flushing gun switch self-locking-unlocking method is applied to the above-mentioned pulse flushing gun switch self-locking-unlocking device, the active sheet 11 is provided with an L-shaped guide groove 17, and the boss 5 is arranged in the guide groove 17, comprising the following steps:

[0056] S1, such as Figure 2As shown, when the pulse flushing gun is not in operation, the second arc surface 15 is closely matched with the first arc surface 14, and the end of the push rod 2 outside the housing 1 is at the farthest position from the housing 1 in the moving stroke of the push rod 2;

[0057] S2, such as Figure 3 As shown, when the pulse flushing gun starts to work, the section of the push rod 2 located outside the housing 1 is pushed to move toward the housing 1, and the boss 5 moves in the guide groove 17 to push the active plate 11 to swing around the first pin 9 toward the end of the push rod 2 located outside the housing 1, and the second arc surface 15 moves out of the first arc surface 14, and the push protrusion 8 moves toward the locking plate 4 until it abuts against the end surface of the locking plate 4 toward the clamping groove 6 of the push protrusion 8;

[0058] S3, such as Figure 4 As shown, in the process of preparing to lock the working state of the pulse flushing gun, after the protrusion 8 is pushed to the end surface of the clamping groove 6, the push rod 2 is continuously pushed into the housing 1. When the boss 5 is located at the terminal end of the guide groove 17, the push rod 2 is limited by the terminal end of the guide groove 17 and no longer moves in the original direction of travel. At this time, the locking piece 4 rotates around the second pin shaft 10 until the positioning micro-protrusion 16 is clamped into the clamping groove 6, and at the same time, the other clamping groove 6 faces the clamping protrusion 7.

[0059] S4, such as Figure 5 As shown, in the process of locking the working state of the pulse flushing gun, under the action of the reset spring 19, the push rod 2 moves toward the outside of the housing 1, and the boss 5 moves in the guide groove 17 to push the active plate 11 to swing around the first pin 9 toward the end of the push rod 2 outside the housing 1, and the clamping protrusion 7 is clamped into the clamping groove 6 on the locking plate 4 facing the clamping protrusion 7, and the top of the clamping protrusion 7 is located at the bottom of the clamping groove 6, which prevents the push rod 2 from continuing to move toward the outside of the housing 1, so that the pulse flushing gun is in a self-locking state;

[0060] S5, such as Figure 6 As shown, when the self-locking state of the pulse flushing gun needs to be released, the push rod 2 is moved toward the inside of the housing 1, and the boss 5 moves in the guide groove 17 to push the active plate 11 to swing around the first pin 9 toward the end of the push rod 2 outside the housing 1, so that the clamping protrusion 7 moves out of the clamping groove 6, and the pushing protrusion 8 pushes the first arc surface 14 facing the pushing protrusion 8, so that the locking plate 4 rotates in the transition notch 13 until the first arc surface 14 facing away from the pushing protrusion 8 faces the clamping protrusion 7;

[0061] S6, such as Figure 7As shown, when the pulse flushing gun needs to be kept unlocked, after the first arc surface 14 facing away from the push protrusion 8 faces the latching protrusion 7, the push rod 2 moves toward the outside of the housing 1 under the action of the reset spring 19, and the boss 5 moves in the guide groove 17 to push the active plate 11 to swing around the first pin shaft 9 toward the end of the push rod 2 outside the housing 1. After the latching protrusion 7 contacts the first arc surface 14, the push rod 2 continues to move in the original direction. The latching protrusion 7 pushes the locking plate 4 to rotate until the first arc surface 14 coincides with the second arc surface 15, so that the pulse flushing gun is in a non-working state.

[0062] The working principle of this embodiment is described as follows: a power supply sheet installation position 22 is provided on the side of the push rod 2 that is adjacent to the boss 5 and faces away from the boss 5. A power supply sheet for controlling the water flow switch and size of the pulse flushing gun is provided on the power supply sheet installation position 22. The power supply sheet installation position 22 and the corresponding power supply sheet adopt the existing technology. The power supply sheet installation position 22 is always located in the housing 1 during the movement of the push rod 2. When the power supply sheet installation position 22 is located adjacent to the side wall of the housing 1 where the switch handle 18 is provided, the pulse flushing gun is in a closed state and does not spray water. When the power supply sheet installation position 22 is located away from the side wall of the housing 1 where the switch handle 18 is provided, as the stroke increases, the water pressure sprayed by the pulse flushing gun gradually increases, that is:

[0063] In step S1, the power sheet installation position 22 is close to the side wall of the housing 1 provided with the switch handle 18, and the pulse flushing gun does not spray water;

[0064] In the process of step S1 turning to the final state of step S2, the pulse flushing gun starts to spray pulse water flow, and the sprayed pulse water flow is transformed from low-pressure pulse water flow to high-pressure pulse water flow;

[0065] In the process of step S3 turning to the final state of step S4 and step S5 in sequence, the pulse flushing gun is always in the state of spraying high-pressure pulse water flow;

[0066] In the process of transitioning from step S6 to step S1, the pulse water flow sprayed by the pulse flushing gun changes from a high-pressure pulse water flow to a low-pressure pulse water flow and finally stops spraying water.

[0067] The connecting rod mechanism composed of the push rod 2 and the active plate 11 drives the driven plate 12 to swing around the first pin shaft 9. During the swinging of the driven plate 12 around the first pin shaft 9, the pushing protrusion 8 pushes the locking plate 4 to rotate around the second pin shaft 10. The ratchet pawl mechanism composed of the locking plate 4 and the clamping protrusion 7 realizes the self-locking-unlocking function of the push rod 2 position due to the in and out movement of the clamping protrusion 7 relative to the clamping groove 6, thereby realizing the self-locking-unlocking operation of the pulse flushing gun to spray high-pressure pulse water flow, and realizing the transition between the self-locking state and the unlocking state through the setting of the first arc surface 14 and the second arc surface 15, thereby preventing the locking plate 4 from rotating in the unlocking state and getting stuck in the clamping protrusion 7 or the positioning micro-protrusion 16 by mistake, resulting in the inability to execute subsequent steps.

[0068] Example 2

[0069] The housing 1 is provided with a slide rail for the switch handle 18 to move toward the housing 1 , and two ends of the push rod 2 are hinged to the switch handle 18 and the active sheet 11 respectively.

[0070] The rest of the structure and principle are the same as those in Example 1.

[0071] Example 3

[0072] like Figure 8 As shown, the active plate 11 and the driven plate 12 are of integrated design.

[0073] The rest of the structure and principle are the same as those in Example 1.

[0074] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. According to the technical essence of the present invention, within the spirit and principles of the present invention, any simple modification, equivalent replacement and improvement made to the above embodiment still falls within the protection scope of the technical solution of the present invention.

Claims

1. A pulse flushing gun switch self-locking-unlocking device, used in a housing (1) of a pulse flushing device, wherein the housing (1) is penetrated by a push rod (2) which can move in the housing (1) to control the water spraying action switch of the pulse flushing gun, and characterized in that: The housing (1) further comprises a rotating piece (3) and a locking piece (4) which are hinged to the housing (1); a boss (5) for pushing the rotating piece (3) so that the rotating piece (3) swings around a hinged portion between the rotating piece (3) and the housing (1); a locking groove (6) is provided on the locking piece (4); a locking protrusion (7) for locking into the locking groove (6) and a pushing protrusion (8) for pushing the locking piece (4) to rotate around a hinged portion between the locking piece (4) and the housing (1) so that the locking groove (6) faces the locking protrusion (7); when the rotating piece (3) is driven to swing so that the locking protrusion (7) is locked in the locking groove (6), the rotating piece (3) can only swing in a direction opposite to the original swinging direction. A first pin (9) is provided at a hinged position between the rotating plate (3) and the housing (1), and a second pin (10) is provided at a hinged position between the locking plate (4) and the housing (1). The first pin (9) and the second pin (10) are arranged in parallel. When the clamping protrusion (7) is located in the clamping groove (6), the top end of the clamping protrusion (7) is located outside a plane area enclosed by the first pin (9) and the second pin (10) and in an area extending normally away from a side of the push rod (2) located outside the housing (1). The rotating plate (3) comprises an active plate (11) which contacts the boss (5) and a driven plate (12) which contacts the locking plate (4), respectively. The active plate (11) and the driven plate (12) are fixedly connected. The driven plate (12), the active plate (11) and the push rod (2) are sequentially arranged in the housing (1) along the axial direction of the first pin shaft (9) and in a direction away from the connection between the first pin shaft (9) and the housing (1). The locking plate (4) is symmetrical about the second pin shaft (10), and a transition notch (13) is provided on the outer edge of the driven plate (12) for allowing the locking plate (4) to move when rotating around the second pin shaft (10). A clamping protrusion (7) is provided at one end of the transition notch (13) away from the push rod (2) and located outside the housing (1), and a pushing protrusion (8) is provided at one end of the transition notch (13) adjacent to the push rod (2) and located outside the housing (1). The distance between the pushing protrusion (8) and the first pin shaft (9) is greater than the distance between the clamping protrusion (7) and the first pin shaft (9). The outer contour of the locking piece (4) is in the shape of a quadrangular prism. Two opposite side walls of the locking piece (4) are provided with a snap-fitting groove (6). The other two opposite side surfaces of the locking piece (4) are provided with a first arc surface (14) which is concave inwardly. The driven piece (12) is provided with a second arc surface (15) which is convex outwardly. The center of the second arc surface (15) is located on the axis of the first pin shaft (9). The first arc surface (14) and the second arc surface (15) are in a mutually matched state. The snap-fitting protrusion (7) is provided at the junction of the second arc surface (15) and the transition notch (13). The pushing protrusion (8) is in the shape of an arc with the first pin shaft (9) as the center, and the pushing protrusion (8) is provided with a positioning micro-protrusion (16) for snapping into the snap-in groove (6) in the direction of the first pin shaft (9), and the distance between the positioning micro-protrusion (16) and the first pin shaft (9) is greater than the distance between the second pin shaft (10) and the first pin shaft (9); When the locking plate (4) is rotated to a state where the center of any one of the first arc surface (14) coincides with the center of the second arc surface (15), the distance between the positioning micro-protrusion (16) and the first pin shaft (9) is greater than the distance between the inner end of the clamping groove (6) and the first pin shaft (9), and the distance between the positioning micro-protrusion (16) and the first pin shaft (9) is less than the distance between the end of the clamping groove (6) away from the first pin shaft (9) and the first pin shaft (9); When the positioning micro-protrusion (16) is locked in the locking groove (6), the positioning micro-protrusion (16) is located on a side of the push rod (2) located outside the housing, with the line between the first pin shaft (9) and the second pin shaft (10) as the boundary.

2. A pulse flushing gun switch self-locking-unlocking device according to claim 1, characterized in that: The active plate (11) is provided with a guide groove (17) for the boss (5) to move, and the boss (5) is arranged in the guide groove (17).

3. A pulse flushing gun switch self-locking-unlocking device according to claim 2, characterized in that: The active plate (11) is in an arc shape, the guide groove (17) is in an L shape, and both sides of the guide groove (17) extend from the arc surface of the active plate (11) toward the first pin shaft (9) and intersect adjacent to the first pin shaft (9).

4. A pulse flushing gun switch self-locking-unlocking device according to claim 1, characterized in that: Each corner of the clamping groove (6), the clamping protrusion (7) and the pushing protrusion (8) is rounded.

5. A pulse flushing gun switch self-locking and unlocking method, characterized in that: A pulse flushing gun switch self-locking-unlocking device applied to any one of claims 1 to 4, wherein an L-shaped guide groove (17) is provided on the active plate (11), and a boss (5) is provided in the guide groove (17), comprising the following steps: S1. When the pulse flushing gun is in a non-operating state, the second arc surface (15) cooperates with the first arc surface (14), and the end of the push rod (2) located outside the housing (1) is at a position farthest from the housing (1) in the moving stroke of the push rod (2); S2. When the pulse flushing gun starts to work, the section of the push rod (2) located outside the housing (1) is pushed toward the inside of the housing (1) by force, and the boss (5) moves in the guide groove (17) to push the active plate (11) to swing around the first pin (9) toward the end of the push rod (2) located outside the housing (1), away from the second arc surface (15), and the push protrusion (8) moves toward the locking plate (4) until it abuts against the end surface of the locking plate (4) that is the engaging groove (6) facing the push protrusion (8); S3. In the process of preparing to lock the working state of the pulse flushing gun, after the protrusion (8) is pushed to the end surface of the engaging groove (6), the push rod (2) is continuously pushed into the housing (1). When the boss (5) is located at the terminal end of the guide groove (17), the push rod (2) is limited by the terminal end of the guide groove (17) and no longer moves. At this time, the locking piece (4) rotates around the second pin shaft (10) until the positioning micro-protrusion (16) is engaged in the engaging groove (6), and at the same time, the other engaging groove (6) faces the engaging protrusion (7). S4. In the process of locking the pulse flushing gun in the working state, the push rod (2) is moved toward the outside of the housing (1), the boss (5) moves in the guide groove (17), thereby pushing the active plate (11) to swing around the first pin (9) toward the end of the push rod (2) located outside the housing (1), and the engaging protrusion (7) is engaged in the engaging groove (6) on the locking plate (4) facing the engaging protrusion (7). The top end of the engaging protrusion (7) is located at the bottom end of the engaging groove (6), and the push rod (2) cannot continue to move toward the outside of the housing (1), so that the pulse flushing gun is in a self-locking state; S5. When the self-locking state of the pulse flushing gun needs to be released, the push rod (2) is moved toward the inside of the housing (1), and the boss (5) moves in the guide groove (17), thereby pushing the active plate (11) to swing around the first pin shaft (9) toward the end of the push rod (2) outside the housing (1), so that the engaging protrusion (7) moves out of the engaging groove (6), and the pushing protrusion (8) pushes the first arc surface (14) toward the pushing protrusion (8), so that the locking plate (4) rotates in the transition notch (13) until the first arc surface (14) facing away from the pushing protrusion (8) faces the engaging protrusion (7); S6. When it is necessary to keep the pulse flushing gun unlocked, after the first arc surface (14) facing away from the pushing protrusion (8) faces the engaging protrusion (7), the push rod (2) moves toward the outside of the housing (1), and the boss (5) moves in the guide groove (17) to push the active plate (11) to swing around the first pin shaft (9) toward the end of the push rod (2) outside the housing (1). After the engaging protrusion (7) contacts the first arc surface (14), the push rod (2) continues to move in the original direction. The engaging protrusion (7) pushes the locking plate (4) to rotate until the first arc surface (14) cooperates with the second arc surface (15), so that the pulse flushing gun is in a non-operating state.

Images