High-pressure water gun with self-locking function

Abstract

The invention relates to the technical field of high-pressure guns, in particular to a high-pressure water gun with a self-locking function, the high-pressure gun comprises a valve mechanism, the valve mechanism comprises a gun valve sleeve, a valve assembly, a cam and an ejector rod sleeve, the gun valve sleeve comprises a valve body and a hinge body, the valve body is provided with a water inlet, a water outlet and a valve hole, and the valve assembly is arranged in the valve body. The valve assembly can penetrate through the valve hole to be exposed out of the valve body, the cam is provided with a first hinge point and a second hinge point, the first hinge point is connected with the hinge body in a relatively rotating mode through a first fastener, the ejector rod sleeve is fixedly connected with the valve assembly exposed out of the valve body, and the ejector rod sleeve is attached to the surface of the cam. And the cam is self-locked after the communication of the water inlet and the water outlet on the valve body is completely opened. The device solves the technical problems that when a high-pressure water gun is used for operation, an operator needs to exert gripping force on a triggering mechanism for a long time, and the hand is very prone to fatigue after long-time gripping.

Description

Technical Field

[0001] The present invention relates to the technical field of high-pressure guns, and particularly to a high-pressure water gun with a self-locking function. Background Art

[0002] High-pressure guns are currently widely used. In addition to being used in fields such as fire fighting, food processing, and livestock breeding hygiene, they are also used in environmental cleaning work such as industrial dust removal, urban street cleaning, vehicle cleaning, and household equipment cleaning. A high-pressure water gun is the main component in environmental cleaning work. The high-pressure water sprayed by the high-pressure water gun can peel off and wash away dirt to achieve the purpose of cleaning the surface of an object. Traditional high-pressure water guns use the principle of lever torque amplification to open the ejector rod. When the grip force of the hand holding the trigger mechanism is greater than the resultant force of the water pressure at the water inlet and the elastic force of the gun valve spring, the valve mechanism opens to discharge water. After the communication between the water inlet and outlet channels on the valve body in the valve mechanism is completely opened, although the resistance of the trigger mechanism will significantly decrease, the valve mechanism has a tendency to close the communication between the water inlet and outlet channels on the valve body under the action of the water pressure at the water inlet and the elastic force of the gun valve spring, causing the connection point between the trigger mechanism and the valve mechanism to be stressed, and thus the trigger mechanism has a tendency to reset. However, in order to ensure that the high-pressure water gun can continuously discharge water normally, the operator needs to apply a grip force on the trigger mechanism for a long time. In addition, due to the possible fluctuating changes in the water pressure at the water inlet, under the action of the alternating force of the operator's grip force, the hand is very likely to become fatigued after long-term holding. In summary, it is very necessary to design a high-pressure gun device that is not affected by the water pressure at the water inlet when using a high-pressure water gun for operation. Summary of the Invention

[0003] The purpose of the present invention is to provide a high-pressure water gun with a self-locking function, which is used to solve the technical problems that when using a high-pressure water gun for operation, the operator needs to apply a grip force on the trigger mechanism for a long time. In addition, due to the possible fluctuating changes in the water pressure at the water inlet, under the action of the alternating force of the operator's grip force, the hand is very likely to become fatigued after long-term holding.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows: The present invention provides a high-pressure water gun with a self-locking function, including a valve mechanism. The valve mechanism includes a gun valve sleeve, a valve component, a cam, and a ejector rod sleeve. The gun valve sleeve includes a valve body and a hinge body. The valve body is provided with a water inlet, a water outlet, and a valve hole. The valve component is arranged in the valve body and can pass through the valve hole and be exposed outside the valve body. The cam is provided with a first hinge point and a second hinge point. The first hinge point is rotatably connected to the hinge body through a first fastener. The ejector rod sleeve is fixedly connected to the valve component exposed outside the valve body. The ejector rod sleeve is in contact with the surface of the cam. After the communication between the water inlet and outlet channels on the valve body is completely opened, the cam is self-locked.

[0005] Further, the cam is oval or approximately oval, the first hinge point and the second hinge point are on the long axis of the cam, and the cam can rotate around the first hinge point.

[0006] In some technical solutions of the present invention, the articulated body includes an articulated end and an articulated groove. The first hinge point is rotatably connected to the articulated end through a first fastener. The ejector rod sleeve is arranged in the articulated groove. The rotation of the cam can cause the ejector rod sleeve to move in the articulated groove, and the ejector rod sleeve drives the valve assembly to move in the valve body.

[0007] In some technical solutions of the present invention, the valve assembly includes an ejector rod, a sealing ring, a steel ball seat, a steel ball, a gun valve elastic member and a stop screw. The steel ball seat is provided with a ball seat through hole and a steel ball groove. The steel ball groove can be connected with the steel ball in a matching manner. The sealing ring is installed on the ejector rod. One end of the ejector rod is sleeved with an ejector rod sleeve. The other end of the ejector rod passes through the valve hole and the ball seat through hole and is connected with the steel ball. The steel ball is connected with the gun valve elastic member, and the gun valve elastic member is connected with the stop screw. The stop screw is provided with a screw hole, and the screw hole communicates with the water inlet.

[0008] The function of the sealing ring is to prevent the water in the valve body from overflowing to the outside of the valve body.

[0009] In some technical solutions of the present invention, a part of the ejector rod is outside the valve body and is sleeved with an ejector rod sleeve. Another part of the ejector rod is sleeved with a sealing ring and passes through the steel ball seat through the ball seat through hole and is connected with the steel ball. The steel ball is connected with the gun valve elastic member and is locked in the valve body together with the stop screw.

[0010] In some technical solutions of the present invention, the ejector rod sleeve includes a limit block and a protruding cap. The limit block and the protruding cap are connected. The limit block is slidably connected with the articulated groove. The protruding cap is provided with an ejector rod groove, and the ejector rod cap is sleeved on one end of the ejector rod through the ejector rod groove.

[0011] Further, the ejector rod sleeve is made of wear-resistant material. Specifically, the protruding cap is made of wear-resistant material, which can be wear-resistant alloy. The wear-resistant material has high hardness, can effectively resist wear, extend the service life of the material, and has high strength, can withstand large pressure and impact force, and is not easy to break.

[0012] In some technical solutions of the present invention, the high-pressure water gun with a self-locking function includes a trigger mechanism. The trigger mechanism is rotatably connected to the cam through a second fastener.

[0013] In some technical solutions of the present invention, after the communication between the water inlet and the water outlet channels on the valve body is completely opened, the opening valve reaction force of the steel ball, the first hinge point of the cam and the second hinge point of the cam are on the same straight line, and the cam is self-locked.

[0014] In some technical solutions of the present invention, the trigger mechanism includes a connecting rod and a trigger. One end of the connecting rod is rotatably connected to the second hinge point through a second fastener, and the other end of the connecting rod is rotatably connected to the trigger through a third fastener.

[0015] The function of the reset mechanism is to change the high-pressure water gun from the closed state to the firing state. The operator holds the trigger and rotates it counterclockwise around the fourth fixing member. The connecting rod acts on the second hinge point to push the cam to rotate clockwise around the first hinge point, and at the same time pushes the ejector rod sleeve and the ejector rod to move together. At this time, the connection between the water inlet and the water outlet channels on the valve body is opened, and water starts to flow out.

[0016] In some technical solutions of the present invention, the high-pressure water gun with a self-locking function includes a reset mechanism, and the reset mechanism is connected to the trigger mechanism.

[0017] Further, the reset mechanism includes a reset ejector rod and a reset elastic member. The reset ejector rod is connected to the trigger, and the reset elastic member is connected to the reset ejector rod.

[0018] The function of the reset mechanism is to change the high-pressure water gun from the firing state to the closed state. The operator releases the handle. After the reset spring and the reset ejector rod push the trigger to rotate clockwise around the fourth fixing member to unlock, under the action of the gun valve elastic member, the ejector rod and the steel ball move, and the steel ball fits tightly with the steel ball seat to close the connection between the water inlet and the water outlet channels on the valve body, and the water flow stops.

[0019] In some technical solutions of the present invention, the high-pressure water gun with a self-locking function further includes a gun housing. The gun housing is provided with a mounting groove and a plurality of mounting holes. The reset mechanism is arranged in the mounting groove, and the valve mechanism and the trigger mechanism are fixed in the gun housing through the mounting holes.

[0020] In some technical solutions of the present invention, the gun housing includes a gun barrel and a gun handle. The gun barrel is provided with a first mounting hole, a second mounting hole, a third mounting hole and a mounting groove. The first mounting hole communicates with the water outlet, the second mounting hole is fixedly connected to the valve body, the third mounting hole is for the trigger to pass through, and the trigger is rotatably connected in the gun barrel through a fourth fastener. The trigger and the gun handle are arranged at an angle.

[0021] Further, a front limit post is also provided on the gun barrel, and a rear limit post is provided on the gun handle.

[0022] The front limit post is the maximum angle at which the trigger and the gun handle are opened, and the rear limit post is the minimum angle at which the trigger and the gun handle are opened. That is, when the trigger is at the front limit post, it is in the closed state, and when the trigger is at the rear limit post, it is in the firing state.

[0023] Further, there is a ring of convex rings in the middle of the reset ejector rod. The reset elastic member is sleeved on one end of the reset ejector rod and abuts against the convex rings, and they are arranged together in the mounting groove. The other end of the reset ejector rod can protrude out of the mounting groove and be connected to the trigger.

[0024] The convex ring is provided to ensure that the reset ejector rod and the reset elastic member are always located in the installation groove.

[0025] In some technical solutions of the present invention, the gun housing of the high-pressure water gun with a self-locking function can be disassembled into a left gun housing and a right gun housing that are symmetrical to each other.

[0026] Further, the diameter of the ejector rod is not greater than the inner diameter of the through hole of the steel ball seat, the diameter of the steel ball is greater than the inner diameter of the through hole of the ball seat, and the diameter of the steel ball is less than the inner diameter of the valve body.

[0027] The steel ball can be in close contact with the steel ball seat to close the communication between the water inlet and the water outlet channels on the valve body. The ejector rod pushes the steel ball away from the steel ball seat, thereby opening the communication between the water inlet and the water outlet channels on the valve body.

[0028] Further, the valve mechanism is made of a rigid material. Specifically, both the steel ball and the steel ball seat are made of rigid materials.

[0029] The rigid material can provide sufficient strength, stiffness, and stability, enabling the steel ball and the steel ball seat to withstand the water pressure and the elastic force of the gun valve elastic member, ensuring the long-term durability and safety in use of the steel ball and the steel ball seat.

[0030] Further, the first fastener and the second fastener are rigidly connected and can be a pin.

[0031] The rigid connection not only facilitates installation but also ensures sufficient strength, stiffness, and stability to withstand the water pressure and the elastic force of the gun valve elastic member.

[0032] Further, the gun valve elastic member and the reset elastic member can be springs.

[0033] The high-pressure water gun with a self-locking function of the present invention utilizes cam self-locking. When the communication between the water inlet and the water outlet channels on the valve body is fully opened, it is not affected by the water pressure at the water inlet, enabling the operator to avoid applying a large gripping force for a long time, ensuring the comfort and safety of operating the high-pressure water gun. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Schematic explosion structure diagram of the high-pressure water gun with a self-locking function provided by an embodiment of the present invention, removing the ejector rod sleeve; Figure 2 Schematic axonometric structure diagram of the high-pressure water gun with a self-locking function provided by an embodiment of the present invention in the gun-closed state; Figure 3 Schematic axonometric structure diagram of the high-pressure water gun with a self-locking function provided by an embodiment of the present invention in the gun-open state; Figure 4 For Figure 2Schematic longitudinal sectional structure diagram of a high-pressure water gun with a self-locking function in the gun-closed state; Figure 5 is Figure 3 Schematic longitudinal sectional structure diagram of a high-pressure water gun with a self-locking function in the gun-fired state; Figure 6 is Figures 2 to 5 Axonometric structure diagram of the push rod sleeve in the figure; In the figure, 1 is the valve mechanism, 11 is the gun valve sleeve, 111 is the valve body, 1111 is the water inlet, 1112 is the water outlet, 1113 is the valve hole, 112 is the articulated body, 1121 is the articulated end, 1122 is the articulated groove, 12 is the valve component, 121 is the push rod, 122 is the sealing ring, 123 is the steel ball seat, 124 is the steel ball, 125 is the gun valve elastic part, 126 is the stop screw, 13 is the cam, 131 is the first articulated point, 132 is the second articulated point, 14 is the push rod sleeve, 141 is the limit block, 142 is the protruding cap, 1421 is the push rod groove, 2 is the trigger mechanism, 21 is the connecting rod, 22 is the trigger, 3 is the reset mechanism, 31 is the reset push rod, 32 is the reset elastic part, 4 is the gun shell, 41 is the gun barrel, 411 is the first mounting hole, 412 is the second mounting hole, 413 is the third mounting hole, 414 is the mounting groove, 42 is the gun handle, 43 is the left gun shell, 44 is the right gun shell. Detailed implementation mode

[0035] The following further elaborates on the present invention in conjunction with the accompanying drawings and through specific embodiments. It should be noted that for ordinary technical personnel in this technical field, without departing from the principle of the present invention, modifications of various equivalent forms of the invention all fall within the scope defined by the claims appended to this application.

[0036] Unless the context clearly indicates otherwise, when used in this specification, the terms "comprising" and "including" specify the presence of elements, but do not exclude the presence or addition of one or more other elements.

[0037] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "one end", "the other end", "upper", "lower", "inner side", "end", "between", "side surface", "side wall", "edge", "surface", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more than two.

[0038] In the description of the present application, it should be noted that, unless otherwise clearly specified and defined, the terms "installed", "set", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood through specific circumstances.

[0039] The high-pressure water gun with a self-locking function of the present invention can preferably solve the technical problem that when using a high-pressure water gun for operation, the operator needs to apply a holding force on the trigger mechanism for a long time. In addition, due to the possible fluctuation and change of the water pressure at the water inlet, under the action of the alternating force of the operator's hand grip force, the hand is very easy to get fatigued after holding for a long time.

[0040] The present invention provides a high-pressure water gun with a self-locking function, referring to Figures 1 to 6 , which is an embodiment of the high-pressure water gun with a self-locking function provided by the present invention. Hereinafter, the high-pressure water gun with a self-locking function will be described in detail with reference to specific drawings.

[0041] As Figure 1 , Figure 2 and Figure 3As shown in the figure, a high-pressure water gun with a self-locking function according to the present invention includes a valve mechanism 1, a trigger mechanism 2, a reset mechanism 3, and a gun housing 4. An installation groove 414 and a plurality of installation holes are provided on the gun housing 4. An inlet 1111 and an outlet 1112 are provided on the valve mechanism 1. One end of the valve mechanism 1 close to the inlet 1111 is fixed in the gun housing 4 through an installation hole. The outlet 1112 of the valve mechanism 1 communicates with an installation hole on the gun housing 4. The trigger mechanism 2 is installed in the gun housing 4. The trigger mechanism 2 is rotatably connected to the valve mechanism 1 through a second fastener. The reset mechanism 3 is arranged in the installation groove 414, and the reset mechanism 3 is connected to the trigger mechanism 2. By holding the gun housing 4 and applying a holding force on the trigger mechanism 2, the communication between the inlet 1111 and the outlet 1112 on the valve mechanism 1 is controlled. After the holding force is removed, the reset mechanism 3 can make the trigger mechanism 2 return to its initial state.

[0042] Further, the gun housing 4 includes a gun barrel 41 and a gun handle 42. A first installation hole 411, a second installation hole 412, a third installation hole 413, and an installation groove 414 are provided on the gun barrel 41. The first installation hole 411 communicates with the outlet 1112. The second installation hole 412 is fixedly connected to the valve mechanism 1. The third installation hole 413 allows the trigger mechanism 2 to pass through. The trigger mechanism 2 is rotatably connected in the gun barrel 41 through a fourth fastener. The reset mechanism 3 is arranged in the installation groove 414.

[0043] More specifically, the valve mechanism 1 includes a gun valve sleeve 11, a valve assembly 12, a cam 13 and a tappet sleeve 14. The gun valve sleeve 11 includes a valve body 111 and a hinge body 112. An inlet 1111, an outlet 1112 and a valve hole 1113 are provided on the valve body 111. The valve assembly 12 is disposed within the valve body 111 and can pass through the valve hole 1113 and be exposed outside the valve body 111. The cam 13 is provided with a first hinge point 131 and a second hinge point 132. The first hinge point 131 is rotatably connected to the hinge body 112 by a first fastener. The tappet sleeve 14 is fixedly connected to the valve assembly 12 exposed outside the valve body 111, and the tappet sleeve 14 is in contact with the surface of the cam 13. The trigger mechanism 2 includes a connecting rod 21 and a trigger 22. One end of the connecting rod 21 is rotatably connected to the second hinge point 132 of the cam 13 by a second fastener, and the other end of the connecting rod 21 is rotatably connected to the trigger 22 by a third fastener. The valve body 111 is fixedly connected to the second mounting hole 412. The trigger 22 passes through the third mounting hole 413 and is rotatably connected in the gun barrel 41 by a fourth fastener. The trigger 22 and the gun handle 42 are arranged at an angle. The above structure is arranged in such a way that it is convenient for the operator to hold the gun handle 42 and apply a holding force on the trigger 22 during the process of the high-pressure gun changing from the gun-closed state to the gun-fired state. The angle between the trigger 22 and the gun handle 42 gradually becomes smaller, and the trigger 22 rotates counterclockwise around the fixed point of the fourth fastener. Then, through the connecting rod 21, a lever force acts on the second hinge point 132, causing the cam 13 to rotate clockwise around the first hinge point 131. The rotation of the cam 13 can drive the tappet sleeve 14 to move, and the tappet sleeve 14 drives the valve assembly 12 to move within the valve body 111 and controls the communication between the inlet 1111 and the outlet 1112 on the valve body 111. The reset mechanism 3 includes a reset tappet 31 and a reset elastic member 32. There is a ring-shaped convex ring in the middle of the reset tappet 31. The reset elastic member 32 is sleeved on one end of the reset tappet 31 and abuts against the convex ring and is arranged together in the mounting groove 414. The other end of the reset tappet 31 can protrude outside the mounting groove 414 and be connected to the trigger 22. The convex ring is provided to enable the reset tappet 31 and the reset elastic member 32 to always be located within the mounting groove 414. During the process of the operator using the high-pressure gun from the gun-closed state to the gun-fired state, the angle between the trigger 22 and the gun handle 42 gradually becomes smaller until the cam 13 is self-locked. The trigger 22 pushes the reset tappet 31 to compress the reset elastic member 32, and the reset elastic member 32 accumulates elastic potential energy. When the holding force is removed, the reset elastic member 32 releases the elastic potential energy to the reset tappet 31 to push the trigger 22 to rotate clockwise to the initial state. The connecting rod 21 drives the cam 13 to rotate counterclockwise, and the valve assembly 12 pushes the tappet sleeve 14 to move, closing the communication between the inlet 1111 and the outlet 1112 channels on the valve body 111.

[0044] Such as Figure 1 , Figure 4 and Figure 5As shown, the articulated body 112 includes an articulated end 1121 and an articulated groove 1122. The first articulated point 131 is rotatably connected to the articulated end 1121 through a first fastener. The ejector rod sleeve 14 is disposed in the articulated groove 1122. The rotation of the cam 13 can cause the ejector rod sleeve 14 to move in the articulated groove 1122, and the ejector rod sleeve 14 drives the valve assembly 12 to move within the valve body 111. The valve assembly 12 includes an ejector rod 121, a sealing ring 122, a steel ball seat 123, a steel ball 124, a gun valve elastic member 125, and a stop screw 126. The steel ball seat 123 is provided with a ball seat through hole and a steel ball groove. The steel ball groove can be cooperatively connected with the steel ball 124. The steel ball seat 123 and the steel ball 124 are used to control the communication between the water inlet 1111 and the water outlet 1112 on the valve body 111. The steel ball 124 is in close fit with the steel ball groove to close the communication of the channels of the water inlet 1111 and the water outlet 1112. The sealing ring 122 is installed on the ejector rod 121 to prevent liquid from flowing out of the valve body 111. One end of the ejector rod 121 is sleeved with the ejector rod sleeve 14, and the other end of the ejector rod 121 passes through the valve hole 1113 and the ball seat through hole to be connected with the steel ball 124. The steel ball 124 is connected with the gun valve elastic member 125, and the gun valve elastic member 125 is connected with the stop screw 126. The stop screw 126 is provided with a screw hole, and the screw hole communicates with the water inlet 1111. A part of the ejector rod 121 is outside the valve body 111 and is sleeved with the ejector rod sleeve 14. Another part of the ejector rod 121 is sleeved into the sealing ring 122 and passes through the steel ball seat 123 through the ball seat through hole to be connected with the steel ball 124. The steel ball 124 is connected with the gun valve elastic member 125 and is locked in the valve body 111 together with the stop screw 126. The gun valve elastic member 125 acts on the steel ball 124 with elastic potential energy, and then the steel ball 124 transfers the acting force to the ejector rod 121, so that the ejector rod sleeve 14 sleeved on the end of the ejector rod 121 and the cam 13 always keep the surface in contact.

[0045] More specifically, when operating with a high-pressure gun, when there is an external force greater than the valve opening force (the sum of the gun valve spring and the water pressure at the water inlet 1111) pushing the ejector rod 121 downward from top to bottom to push open the steel ball 124, the trigger mechanism 2 pushes the valve mechanism 1 from the gun-closed state (such as Figure 2 or Figure 4 ) to the gun-open state (such as Figure 3 or Figure 5 ).

[0046] In the gun-closed state, the reaction force of the opening valve acting on the steel ball 124 (the resultant force of the water pressure at the water inlet 1111 and the spring force of the gun valve) is on the same straight line as the first hinge point 131 of the cam 13. At this time, the resultant force of the water pressure at the water inlet 1111 and the spring force of the gun valve is completely transmitted by the steel ball 124 and acts on the steel ball seat 123. The steel ball 124 presses against the ejector rod 121, causing the ejector rod sleeve 14 and the surface of the cam 13 to fit tightly. The gun valve elastic member 125 causes the steel ball 124 and the steel ball seat 123 to fit tightly. Under the dual action of the elastic force of the gun valve elastic member 125 and the water pressure at the water inlet 1111, the steel ball 124 completely presses against the steel ball seat 123, closing the connection between the water inlet 1111 and the water outlet 1112 channels on the valve body 111 to achieve the state where the water gun is sealed and no water flows out.

[0047] In the gun-fired state, the reaction force of the opening valve acting on the steel ball 124 (the resultant force of the water pressure at the water inlet 1111 and the spring force of the gun valve) is on the same straight line as the first hinge point 131 and the second hinge point 132 of the cam 13. The cam 13 is self-locked. At this time, the resultant force of the water pressure at the water inlet 1111 and the spring force of the gun valve is completely transmitted by the steel ball 124 and acts on the first hinge point 131 and the second hinge point 132 (rigid connection) of the cam 13. The ejector rod sleeve 14 and the surface of the cam 13 fit tightly. The ejector rod 121 separates the steel ball 124 from the steel ball seat 123, and the gun valve elastic member 125 accumulates elastic potential energy, opening the connection between the water inlet 1111 and the water outlet 1112 channels on the valve body 111 to achieve the state where the water gun flows smoothly. That is, after the connection between the water inlet 1111 and the water outlet 1112 channels on the valve body 111 is completely opened, the reaction force of the opening valve acting on the steel ball 124 (the resultant force of the water pressure at the water inlet 1111 and the spring force of the gun valve) is on the same straight line as the first hinge point 131 and the second hinge point 132 of the cam 13, and the cam 13 is self-locked.

[0048] As Figure 6 shown, the ejector rod sleeve 14 includes a limit block 141 and a protruding cap 142. The limit block 141 and the protruding cap 142 are connected. The limit block 141 and the protruding cap 142 can be integrally formed. The limit block 141 is slidably connected to the hinge groove 1122. The protruding cap 142 is provided with an ejector rod groove 1421. The ejector rod sleeve 14 is sleeved on one end of the ejector rod 121 through the ejector rod groove 1421. The limit block 141 is used to limit the rotation of the ejector rod sleeve 14 and prevent the ejector rod 121 from rotating in the valve body 111.

[0049] The protruding cap in the ejector rod sleeve is made of wear-resistant material, which can be wear-resistant alloy. The protruding cap is the contact stress point between the ejector rod sleeve and the cam. The wear-resistant material has high hardness, which can effectively resist wear and extend the service life of the material. It also has high strength, can withstand large pressure and impact force, and is not easy to break.

[0050] After the communication channels of the water inlet 1111 and the water outlet 1112 on the valve body 111 are completely opened, the trigger 22 is located at the rear limit post on the gun barrel 41. The channels of the water inlet 1111, the screw hole, the ball seat through-hole and the water outlet 1112 in the valve body 111 are completely penetrated. The resultant force of the water pressure at the water inlet 1111 and the spring force of the gun valve acts on the first hinge point 131 of the steel ball 124 and the cam 13 and the second hinge point 132 of the cam 13 are on the same straight line. The resultant force of the water pressure at the water inlet 1111 and the spring force of the gun valve is completely transmitted by the steel ball 124 and acts on the first hinge point 131 of the cam 13 and the second hinge point 132 of the cam 13 (rigid connection). The hand needs to hold the trigger 22 for a long time to keep the trigger 22 in the rear blocking position on the gun handle 42, thereby completing the cleaning work. Since the cam 13 has a self-locking function, the holding force applied at this time is only the elastic force of the return spring acting on the trigger 22. Therefore, the hand will be subjected to a very small force, that is, not affected by the water pressure at the water inlet 1111, and can be held with a smaller force, avoiding hand fatigue caused by long-term holding.

[0051] The high-pressure water gun with a self-locking function of the present invention utilizes cam self-locking. When the communication channels of the water inlet and the water outlet on the valve body are completely opened, it is not affected by the water pressure at the water inlet, enabling the operator to avoid applying a large holding force for a long time and ensuring the comfort and safety of operating the high-pressure water gun.

Claims

1. A high-pressure water gun with a self-locking function, characterized in that: The invention comprises a valve mechanism (1), wherein the valve mechanism (1) comprises a gun valve sleeve (11), a valve assembly (12), a cam (13) and a push rod sleeve (14); the gun valve sleeve (11) comprises a valve body (111) and a hinged body (112); a water inlet (1111), a water outlet (1112) and a valve hole (1113) are arranged on the valve body (111); the valve assembly (12) is arranged in the valve body (111); the valve assembly (12) can pass through the valve hole (1113) to be exposed on the valve body (1111) ), the cam (13) is provided with a first hinge point (131) and a second hinge point (132), the first hinge point (131) is connected to the hinge body (112) via a first fastener so as to be relatively rotatable, the push rod sleeve (14) is fixedly connected to the valve assembly (12) exposed outside the valve body (111), the push rod sleeve (14) is in contact with the surface of the cam (13), and the cam (13) is self-locking after the communication between the water inlet (1111) and the water outlet (1112) on the valve body (111) is fully opened.

2. The high-pressure water gun with self-locking function according to claim 1, characterized in that: The hinged body (112) comprises a hinged end (1121) and a hinged groove (1122); the first hinge point (131) is connected to the hinged end (1121) via a first fastener so as to be relatively rotatable; the push rod sleeve (14) is arranged in the hinged groove (1122); the rotation of the cam (13) can cause the push rod sleeve (14) to move in the hinged groove (1122); and the push rod sleeve (14) drives the valve assembly (12) to move in the valve body (111).

3. The high-pressure water gun with self-locking function according to claim 2, characterized in that: The valve assembly (12) comprises a push rod (121), a sealing ring (122), a steel ball seat (123), a steel ball (124), a gun valve elastic member (125) and a stop screw (126). The steel ball seat (123) is provided with a ball seat through hole and a steel ball groove, and the steel ball groove can be matched and connected with the steel ball (124). The sealing ring (122) is installed on the push rod (121). One end of the push rod (121) is sleeved with the push rod sleeve (14), and the other end of the push rod (121) passes through the valve hole (1113) and the ball seat through hole to be connected with the steel ball (124). The steel ball (124) is connected with the gun valve elastic member (125), and the gun valve elastic member (125) is connected with the stop screw (126). The stop screw (126) is provided with a screw hole, and the screw hole is communicated with the water inlet (1111).

4. The high-pressure water gun with self-locking function according to claim 3, characterized in that: A portion of the push rod (121) is outside the valve body (111) and is sleeved with a push rod sleeve (14); another portion of the push rod (121) is sleeved into a sealing ring (122) and passes through a steel ball seat (123) through a ball seat through hole to be connected to a steel ball (124); the steel ball (124) is connected to a gun valve elastic member (125) and is locked in the valve body (111) through a stop screw (126).

5. The high-pressure water gun with self-locking function according to claim 4, characterized in that: The push rod sleeve (14) comprises a limit block (141) and a protruding cap (142), the limit block (141) and the protruding cap (142) being connected, the limit block (141) and the hinge groove (1122) being relatively slidably connected, the protruding cap (142) being provided with a push rod groove (1421), and the push rod sleeve (14) being sleeved on one end of the push rod (121) via the push rod groove (1421).

6. The high-pressure water gun with self-locking function according to claim 1, characterized in that: It comprises a trigger mechanism (2), wherein the trigger mechanism (2) is connected to the cam (13) via a second fastener so as to be relatively rotatable.

7. The high-pressure water gun with self-locking function according to claim 8, characterized in that: The trigger mechanism (2) comprises a connecting rod (21) and a trigger (22); one end of the connecting rod (21) is connected to the second hinge point (132) via a second fastener so as to be relatively rotatable, and the other end of the connecting rod (21) is connected to the trigger (22) via a third fastener so as to be relatively rotatable.

8. The high-pressure water gun with self-locking function according to claim 1, characterized in that: It comprises a reset mechanism (3), wherein the reset mechanism (3) is connected to the trigger mechanism (2).

9. The high-pressure water gun with self-locking function according to claim 10, characterized in that: The reset mechanism (3) comprises a reset push rod (31) and a reset elastic member (32); the reset push rod (31) is connected to the trigger (22); and the reset elastic member (32) is connected to the reset push rod (31).

10. The high-pressure water gun with self-locking function according to claim 1, characterized in that: The gun case (4) comprises a mounting groove (414) and a plurality of mounting holes, the reset mechanism (3) is arranged in the mounting groove (414), and the valve mechanism (1) and the trigger mechanism (2) are fixed in the gun case (4) through the mounting holes.

11. The high-pressure water gun with self-locking function according to claim 12, characterized in that: The gun housing (4) comprises a gun barrel (41) and a gun handle (42); the gun barrel (41) is provided with a first mounting hole (411), a second mounting hole (412), a third mounting hole (413) and a mounting groove (414); the first mounting hole (411) is communicated with a water outlet (1112); the second mounting hole (412) is fixedly connected to the valve body (111); the third mounting hole (413) is for the trigger (22) to pass through; the trigger (22) is relatively rotatably connected to the gun barrel (41) via a fourth fastener; the trigger (22) and the gun handle (42) are arranged to form an included angle.

12. The high-pressure water gun with self-locking function according to claim 12, characterized in that: The reset push rod (31) has a convex ring in the middle, the reset elastic member (32) is inserted into one end of the reset push rod (31) and abuts against the convex ring and is arranged in the mounting groove (414), and the other end of the reset push rod (31) can protrude out of the mounting groove (414) and be connected to the trigger (22).

13. The high-pressure water gun with self-locking function according to claim 13, characterized in that: The gun housing (4) can be split into a left gun housing (43) and a right gun housing (44) that are symmetrical to each other.

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