Handle lock device for high-pressure water gun

Abstract

The utility model relates to high pressure water gun technical field, concretely for high pressure water gun's handle lock catch device, including lock catch mechanism, lock catch mechanism installs between trigger and handle of cleaning machine main body, still be provided with reset spring between trigger and handle, for reset trigger to closed position when no external force, trigger rotatably sets up in handle front part, and trigger can pass through operation control and open and close cleaning machine main body, lock catch mechanism includes steel hook, movable lock catch and U type fixed sheet. In the handle lock catch device of high pressure water gun, lock catch mechanism adopts the combined structure of steel hook, movable lock catch and U type fixed sheet, realizes locking through the mechanical engagement of fixed tooth and pawl, cooperates the clamping entry limit of U type fixed sheet, forms multiple mechanical interlock. This rigid engagement mode avoids the locking failure problem of traditional elastic element due to fatigue, even after high frequency vibration or long -term use of high pressure water gun, still can stably maintain the opening state of trigger.

Description

Technical Field

[0001] This utility model relates to the field of high-pressure water gun technology, and more specifically, to a handle locking device for a high-pressure water gun. Background Technology

[0002] In the field of high-pressure water gun technology, safety and ease of operation have always been key research and development priorities. With the increasing demand for high-pressure water guns in industrial production, cleaning and maintenance, and other fields, the application scenarios for high-pressure water guns are becoming increasingly complex and diverse, placing higher demands on the performance of their handle locking devices.

[0003] In practice, operators often need to hold high-pressure water guns for extended periods, such as in large vehicle washing or building exterior cleaning. If the high-pressure water gun lacks a reliable handle locking device, the operator must continuously press the trigger forcefully, which easily leads to hand muscle fatigue, affecting the accuracy and stability of the operation. Furthermore, the strong recoil and vibration of the water gun itself increase the risk of the operator's hand slipping. Once slippage occurs, the out-of-control high-pressure water gun not only interrupts the work process but may also pose a serious safety threat to surrounding personnel and equipment.

[0004] Currently, numerous related technologies are dedicated to solving the problem of high-pressure water gun handle locking. Taking patent CN201420578579 (A Switch Locking Device for a High-Pressure Washer) as an example, the disclosed technical solution of this patent includes a housing, a button rotatably connected to the housing for opening and closing the switch, a locking button fixedly connected to one end of the button and locking the switch in the open state when it is open, and an elastic element connected at one end to the locking button and at the other end to the switch trigger part. The locking button is provided with a locking part that can cooperate with a corresponding part on the housing to lock the locking button, thereby locking the button. However, this device has certain limitations in practical applications. Its structure is relatively complex, with a large number of parts, which not only increases the cost and difficulty of manufacturing but also increases the probability of device malfunction. Moreover, the locking and unlocking operation of this device relies on the cooperation of a specific elastic element and the locking part. After long-term frequent use, the elastic element is prone to elastic fatigue, leading to unreliable locking and unsmooth unlocking. Utility Model Content

[0005] The purpose of this invention is to provide a handle locking device for a high-pressure water gun, in order to solve the problem mentioned in the background art, where the strong recoil and vibration of the water gun itself increase the risk of the operator's hand slipping during operation. Once slippage occurs, the out-of-control high-pressure water gun will not only interrupt the work process, but may also pose a serious safety threat to surrounding personnel and equipment.

[0006] To achieve the above objectives, this utility model provides a handle locking device for a high-pressure water gun, including a locking mechanism. The locking mechanism is installed between the trigger and the handle of the cleaning machine body. A return spring is also installed between the trigger and the handle to return the trigger to the closed position when no external force is applied. The trigger is rotatably disposed at the front of the handle. The trigger can control the opening and closing of the cleaning machine body through operation. The locking mechanism includes a steel hook, a movable lock, and a U-shaped fixing plate.

[0007] This design clearly defines the core components and installation location of the locking device. By integrating the locking mechanism (steel hook, movable latch, U-shaped retaining plate) between the trigger and handle, and combining it with the elastic force of the return spring, a basic mechanical logic of "trigger-reset" is constructed. The rotatable design of the trigger ensures that it can control the opening and closing of the water valve through operation, while the return spring forces the trigger to return to the closed position when there is no external force, forming a basic safety mechanism.

[0008] Preferably, the U-shaped fixing piece is fixed to the handle, the movable latch is installed on the straight end of the steel hook, the bent end of the steel hook is engaged with the trigger, and the movable latch is engaged with the U-shaped fixing piece.

[0009] This setting refines the connection relationship of each component of the locking mechanism: the U-shaped fixing plate serves as the basic fixing component to connect the handle, the steel hook acts directly on the trigger through the bent end, and the movable lock and the U-shaped fixing plate engage to form an adjustable locking fulcrum, realizing the mechanical cooperation of "fixed-linkage".

[0010] Preferably, when the locking mechanism is in the unlocked state, the movable latch and steel hook release their obstruction of the trigger's movement path, and pressing the trigger opens the high-pressure water valve; when the trigger is pressed to a preset position, the trigger and the locking mechanism are mechanically engaged and locked, at which point the trigger overcomes the spring force of the return spring and remains in the open position, and the main body of the cleaning machine remains open; when an unlocking action is applied to the locking mechanism, the mechanical engagement is released, the trigger returns to the closed position under the action of the return spring, and the main body of the cleaning machine closes.

[0011] This setting defines the working logic of the locking mechanism: through the three-stage action of "unlocking - pressing to lock - unlocking and resetting", the mechanical engagement is used to overcome the spring force of the reset spring to achieve locking. After the engagement is released, the spring force is relied on to complete the reset, forming a safety control mode of "active operation triggering and passive spring reset".

[0012] Preferably, a fixing tooth is installed on the inner wall of one end of the fixing piece, and a locking tooth is installed on the inner wall of the movable latch near the fixing tooth, and the fixing tooth and the locking tooth are mechanically engaged and locked.

[0013] This design uses the toothed meshing structure of the fixed teeth (U-shaped fixing plate) and the locking teeth (movable locking buckle) to transform the locking state of the locking mechanism into a rigid mechanical engagement. The shear force of the tooth surface contact resists the elastic force of the return spring, ensuring reliable locking.

[0014] Preferably, one end of the U-shaped fixing piece is provided with a card slot, and the movable latch is locked in the card slot.

[0015] This design features a U-shaped retaining plate with a locking inlet that provides circumferential restraint to the movable latch, creating a "double fixation" effect with the toothed engagement – ​​the locking inlet restricts the lateral displacement of the movable latch, while the toothed engagement restricts longitudinal loosening, thus enhancing the stability of the overall locking structure.

[0016] Preferably, the bent end of the steel hook is fitted with a rubber gasket.

[0017] This design incorporates a rubber gasket at the bent end of the steel hook that fills the contact gap with the trigger through elastic deformation, increasing friction while buffering the rigid collision between the two, forming a composite structure of "flexible contact + rigid locking".

[0018] Preferably, one end of the U-shaped fixing piece is rotatably connected to the handle via a pin, which facilitates the adjustment of the angle of the U-shaped fixing piece and its engagement with the movable lock.

[0019] This feature features a U-shaped retaining plate that is rotatably connected to the handle via a pin, allowing for fine-tuning of the angle around the pin. This ensures that the movable latch and the U-shaped retaining plate can still precisely align under different assembly errors or wear conditions, adapting to component tolerances and deformation after long-term use.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows: The handle locking mechanism of this high-pressure water gun employs a combination of a steel hook, a movable latch, and a U-shaped fixing plate. Locking is achieved through the mechanical engagement of the fixing teeth and the locking teeth, combined with the U-shaped fixing plate's inlet limiting function, forming multiple mechanical interlocks. This rigid engagement method avoids the locking failure problem caused by fatigue of traditional elastic elements. Even after high-frequency vibration or prolonged use of the high-pressure water gun, it can stably maintain the trigger in the open state, preventing water flow interruption or safety risks caused by accidental unlocking.

[0021] The bent end of the steel hook contacts the trigger through a rubber gasket, which enhances engagement stability and cushions the impact between the trigger and the latch, reducing component wear and extending service life.

[0022] The locking mechanism consists of only a few core components such as a steel hook, a movable latch, and a U-shaped fixing plate. Compared with the complex structure in the comparison document, which includes multiple parts such as a housing, button, lock button, and elastic element, the number of parts is reduced, the assembly process is simpler, and the production and manufacturing costs are significantly reduced.

[0023] In the unlocked state, the movable latch and steel hook release the obstruction of the trigger, allowing the high-pressure water valve to be opened normally by pressing the trigger. In the locked state, simply pressing the trigger to the preset position triggers mechanical engagement, eliminating the need for additional complex operations. This ergonomic design lowers the operational threshold. The U-shaped fixing plate is rotatably connected to the handle via a pin, allowing for flexible angle adjustment to match the engagement position of the movable latch. This ensures smooth locking and unlocking for users with varying operating strengths, improving operational adaptability. In the locked state, the trigger remains open due to the locking mechanism overcoming the return spring's force. Operators do not need to continuously press the trigger, significantly reducing hand muscle fatigue, making it particularly suitable for long-term work scenarios such as large-area cleaning, thus improving work efficiency. Unlocking requires only actively disengaging the locking mechanism; the trigger quickly returns to the closed position under the action of the return spring. This rapid response ensures immediate shutdown in emergencies and prevents accidental operation through a clear "lock-unlock" logic. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the locking mechanism in this utility model; Figure 3 This is a top view of the U-shaped fixing piece in this utility model. Figure 4 This is a side view of the U-shaped fixing piece in this utility model. The meanings of the labels in the diagram are as follows: 1. Cleaning machine body; 2. Handle; 3. Trigger; 4. Return spring; 5. Locking mechanism; 51. Steel hook; 52. Movable lock; 521. Clamping tooth; 53. U-shaped fixing plate; 531. Fixing tooth; 532. Locking entrance; 54. Rubber gasket. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] This utility model provides a handle locking device for a high-pressure water gun, such as... Figure 1 , Figure 2 As shown, it includes a locking mechanism 5, which is installed between the trigger 3 and the handle 2 of the main body 1 of the cleaning machine. A return spring 4 is also installed between the trigger 3 and the handle 2 to return the trigger 3 to the closed position when no external force is applied. The trigger 3 is rotatably set at the front of the handle 2. The trigger 3 can control the opening and closing of the main body 1 of the cleaning machine through operation. The locking mechanism 5 includes a steel hook 51, a movable lock 52, and a U-shaped fixing piece 53.

[0027] The core components and installation location of the locking device are clearly defined. The locking mechanism 5 is integrated between the trigger 3 and handle 2 of the main body 1 of the cleaning machine. Through the elastic force of the return spring 4, a basic mechanical logic of "trigger-reset" is established. The rotatable design of the trigger 3 allows it to control the opening and closing of the main body 1 of the cleaning machine. The return spring 4 pulls the trigger 3 back to the closed position when there is no external force, forming a basic safety mechanism. The locking mechanism 5 consists of a steel hook 51, a movable latch 52, and a U-shaped fixing piece 53, providing a structural basis for subsequent locking actions. A "operation-reset" closed-loop control is constructed to ensure that the trigger 3 automatically resets in the non-operational state, preventing the main body 1 of the cleaning machine from being accidentally opened. The steel components 51, 52, and 53 enhance the structural strength of the locking mechanism 5, adapting to vibration and impact forces under high-pressure environments and extending the overall lifespan of the device.

[0028] In this embodiment, as Figure 1 , Figure 2 As shown, the U-shaped fixing piece 53 is fixed on the handle 2, the movable locking buckle 52 is installed on the straight end of the steel hook 51, the bent end of the steel hook 51 is locked on the trigger 3, and the movable locking buckle 52 is engaged with the U-shaped fixing piece 53.

[0029] The connection relationship of each component of the locking mechanism 5 is refined: the U-shaped fixing plate 53 is fixed to the handle 2 as a basic support, the movable locking buckle 52 is installed on the straight rod end of the steel hook 51, the bent end of the steel hook 51 directly acts on the trigger 3, and the locking buckle 52 and the U-shaped fixing plate 53 are engaged to form an adjustable locking fulcrum, realizing the mechanical cooperation of "fixed-linkage".

[0030] Ensure a stable connection between the locking mechanism 5 and the handle 2 and trigger 3 to prevent loosening or displacement from affecting operation.

[0031] The snap-fit ​​design between the movable latch 52 and the U-shaped fixing piece 53 provides a reliable mechanical basis for the locking / unlocking action, ensuring operational stability.

[0032] Specifically, such as Figure 1 , Figure 2As shown, when the locking mechanism 5 is in the unlocked state, the movable latch 52 and the steel hook 51 release the obstruction of the movement path of the trigger 3, and pressing the trigger 3 can open the high-pressure water valve; when the trigger 3 is pressed to the preset position, the trigger 3 and the locking mechanism 5 are mechanically engaged and locked. At this time, the trigger 3 overcomes the elastic force of the return spring 4 and remains in the open position, and the main body 1 of the cleaning machine remains open; when the locking mechanism 5 is unlocked, the mechanical engagement is released, and the trigger 3 returns to the closed position under the action of the return spring 4, and the main body 1 of the cleaning machine closes.

[0033] The working logic of the locking mechanism 5 is defined as follows: In the unlocked state, the movable latch 52 and the steel hook 51 release their obstruction of the trigger 3, and pressing the trigger 3 opens the high-pressure water valve; when the trigger 3 is pressed to the preset position, it mechanically engages with the locking mechanism 5, overcoming the elasticity of the return spring 4 to remain open, allowing the main body 1 of the cleaning machine to continue working; in the unlocked state, the mechanical engagement is released, and the trigger 3 resets under the action of the return spring 4, closing the main body 1 of the cleaning machine. This achieves a "dual-action start" unlock + press and "active unlock stop" mechanism, preventing accidental start due to a single accidental touch, meeting safety standards. In the locked state, there is no need to continuously press the trigger 3, significantly reducing hand fatigue and improving comfort during long-term operation.

[0034] Furthermore, such as Figure 3 As shown, a fixing tooth 531 is installed on the inner wall of one end of the fixed plate, and a locking tooth 521 is installed on the inner wall of the movable latch 52 near the fixing tooth 531. The fixing tooth 531 and the locking tooth 521 are mechanically engaged and locked.

[0035] The fixing teeth 531 of the U-shaped fixing plate 53 and the locking teeth 521 of the movable latch 52 form a toothed engagement. The shear force of the toothed contact resists the spring force of the return spring 4, transforming the locked state of the latch mechanism 5 into a rigid mechanical engagement, ensuring reliable locking. The toothed engagement 531 and 521 have a large contact area and strong biting force, resisting high-pressure vibration or external impact, preventing accidental unlocking, and improving locking stability. The engagement structure reduces wear after long-term use, extending the service life of the latch mechanism 5.

[0036] Furthermore, such as Figure 4 As shown, a card slot 532 is provided at the bottom of one end of the U-shaped fixing piece 53, and the movable latch 52 is fully locked in the card slot 532.

[0037] The U-shaped retaining plate 53's locking inlet 532 provides circumferential restraint to the movable latch 52, and its engagement with the retaining teeth 531 and locking teeth 521 forms a "double fixation"—the locking inlet 532 restricts the lateral displacement of the movable latch 52, and the toothed engagement restricts longitudinal loosening, strengthening the overall locking structure. This prevents the movable latch 52 from shifting or falling off under force, further improving locking reliability and making it suitable for high-voltage and high-frequency applications. The guiding effect of the locking inlet 532 makes the docking of the movable latch 52 and the U-shaped retaining plate 53 smoother, simplifying operation.

[0038] Furthermore, such as Figure 1 As shown, a rubber gasket 54 is installed at the bent end of the steel hook 51.

[0039] The rubber pad 54 at the bent end of the steel hook 51 fills the contact gap with the trigger 3 through elastic deformation, increasing friction while buffering rigid impact, forming a composite structure of "flexible contact + rigid locking". The rubber pad 54 avoids direct metal-to-metal friction between the steel hook 51 and the trigger 3, reducing component wear and extending the life of both. It increases contact friction, preventing relative slippage caused by vibration in the locked state, improving stability; and at the same time, reducing operating noise.

[0040] Furthermore, such as Figure 1 As shown, one end of the U-shaped fixing piece 53 is rotatably connected to the handle 2 via a pin, which facilitates the adjustment of the angle of the U-shaped fixing piece 53 and its docking with the movable lock 52.

[0041] The U-shaped fixing piece 53 is rotatably connected to the handle 2 via a pin, allowing for fine-tuning of its angle around the pin. This ensures precise alignment between the movable latch 52 and the U-shaped fixing piece 53 even under assembly errors or wear conditions, accommodating component tolerances and long-term deformation. This improves the assembly tolerance of the device, reduces dimensional accuracy requirements, and lowers manufacturing costs. After long-term use, angle adjustment can compensate for component wear, ensuring continuous and reliable operation of the latch mechanism 5 and extending its overall lifespan.

[0042] When using the handle locking device of this utility model's high-pressure water gun, the locking mechanism 5 is initially in a naturally unlocked state. The movable latch 52 and the U-shaped fixing piece 53 are not engaged, and the bent end of the steel hook 51 (with rubber gasket 54) does not obstruct the trigger 3. The return spring 4 is in a naturally extended state, pulling the trigger 3 to the initial closed position. At this time, the high-pressure water valve of the cleaning machine body 1 is closed, and there is no water flow output.

[0043] In the initial state, trigger 3 is forcibly restrained in the closed position by the return spring 4, and will not open even with slight touch, preventing accidental operation. The operator actively moves the movable latch 52, causing it to disengage the steel hook 51 from obstructing the movement path of trigger 3. At this time, the latch mechanism 5 is in the unlocked state. The operator presses trigger 3, causing it to rotate around the pivot point at the front of handle 2, opening the high-pressure water valve of the cleaning machine body 1 through mechanical linkage, and water begins to spray. During this process, the return spring 4 is compressed, storing elastic potential energy. When trigger 3 is pressed to the preset position, the movable latch 52 aligns with the U-shaped fixing plate 53. When the operator releases the external force applied to the movable latch 52, under the elastic restoring force of the steel hook 51, the movable latch 52 is fully engaged with the slot 532 of the U-shaped fixing plate 53, achieving lateral limiting; the locking teeth 521 of the movable latch 52 and the fixing teeth 531 of the U-shaped fixing plate 53 form a toothed mechanical engagement, locking the position longitudinally.

[0044] At this time, the trigger 3 is rigidly engaged with the locking mechanism 5 through the steel hook 51, overcoming the elastic force of the return spring 4 and remaining in the open position. The main body 1 of the cleaning machine continuously sprays high-pressure water, and the operator does not need to continuously press the trigger 3, reducing hand fatigue.

[0045] The operator moves the movable latch 52 again, disengaging the locking teeth 521 and the fixed teeth 531. The movable latch 52 disengages from the locking inlet 532 of the U-shaped fixing plate 53, releasing the mechanical lock. After the mechanical engagement is released, the return spring 4 releases its elastic potential energy, causing the trigger 3 to quickly return to its initial closed position around the rotation point. This mechanical linkage closes the high-pressure water valve of the cleaning machine body 1, stopping the water spray. At this time, the steel hook 51 returns to its initial position under the action of the movable latch 52, forming a potential blockage against the trigger 3 again, and the device returns to a safe state.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A handle lock catch device for a high pressure lance, comprising a catch mechanism (5), characterized in that: The locking mechanism (5) is installed between the trigger (3) and the handle (2) of the main body (1) of the cleaning machine. A return spring (4) is also installed between the trigger (3) and the handle (2) to reset the trigger (3) to the closed position when there is no external force. The trigger (3) is rotatably set at the front of the handle (2). The trigger (3) can control the opening and closing of the main body (1) of the cleaning machine by operation. The locking mechanism (5) includes a steel hook (51), a movable lock (52) and a U-shaped fixing piece (53).

2. The handle shackle device of a high-pressure water gun according to claim 1, characterized in that: The U-shaped fixing piece (53) is fixed on the handle (2), the movable buckle (52) is installed on the straight end of the steel hook (51), the bent end of the steel hook (51) is locked on the trigger (3), and the movable buckle (52) is engaged with the U-shaped fixing piece (53).

3. The handle lock catch device for a high pressure water gun of claim 1, wherein: When the locking mechanism (5) is in the unlocked state, the movable latch (52) and the steel hook (51) release the obstruction of the movement path of the trigger (3), and pressing the trigger (3) can open the high-pressure water valve; when the trigger (3) is pressed to the preset position, the trigger (3) and the locking mechanism (5) are mechanically engaged and locked. At this time, the trigger (3) overcomes the elastic force of the return spring (4) and remains in the open position, and the main body of the cleaning machine (1) remains open; when the unlocking action is applied to the locking mechanism (5), the mechanical engagement is released, and the trigger (3) is reset to the closed position under the action of the return spring (4), and the main body of the cleaning machine (1) is closed.

4. The handle shackle device of a high-pressure water gun according to claim 3, characterized in that: A fixing tooth (531) is installed on the inner wall of one end of the fixed plate, and a locking tooth (521) is installed on the inner wall of the movable latch (52) near the fixing tooth (531). The fixing tooth (531) and the locking tooth (521) are mechanically engaged and locked.

5. The handle lock catch device for a high pressure water lance according to claim 4, characterized in that: The bottom of one end of the U-shaped fixing piece (53) is provided with a card slot (532), and the movable latch (52) is locked in the card slot (532).

6. The handle lock catch device for a high pressure water gun of claim 2, wherein: The bent end of the steel hook (51) is fitted with a rubber pad (54).

7. The handle lock of a high-pressure water gun according to claim 1, characterized in that: One end of the U-shaped fixing piece (53) is rotatably connected to the handle (2) via a pin, which facilitates the adjustment of the angle of the U-shaped fixing piece (53) and its docking with the movable lock (52).

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