A rear-pressing multi-gear self-locking water gun

Abstract

The utility model discloses a back pressure multi -gear self -locking type water gun, including the gun body, the water head, the inside of gun body has the main passageway and has the draw bar of sliding connection, the rear end swing joint of draw bar is provided with the pressure handle, is provided with the flow valve structure on the draw bar, the water gun still includes the multi -gear self -locking structure of draw bar selectively locking in any position in a plurality of different preset axial position, and the multi -gear self -locking structure includes the guide seat, and the draw bar is connected with the guide piece, and the guide seat is equipped with the guide path groove of the movement of guide piece, the guide path groove includes at least two and is connected in proper order the axial section and spiral section of first and last of setting, is provided with a plurality of locking teeth for locking guide piece in preset axial position on spiral section, and guide piece moves along the guide path groove and cooperates with locking tooth, realizes the switching and self -locking of draw bar between a plurality of preset axial position, the utility model has the advantages of convenient operation, appearance is simple, multi -gear water flow regulation and reliable self -locking.

Description

Technical Field

[0001] This utility model relates to the field of water gun technology, and in particular to a rear-pressure multi-stage self-locking water gun. Background Technology

[0002] Water guns, as a common handheld spraying tool, are widely used in various occasions such as garden irrigation, vehicle washing, ground cleaning, and firefighting assistance. Among them, in the rear-pressurized water gun, the user usually controls the water flow by pressing the handle or trigger at the rear of the gun to open the internal valve.

[0003] In existing technology, to reduce hand fatigue during prolonged water spraying, some rear-pressure water guns are designed with a lever locking device. However, most common locking methods currently employ external mechanical latches or hooks. For example, after the lever is pressed to a certain position, the user needs to manually move a separate hook or latch to a specific position to lock the lever or its linked components, thus maintaining continuous water flow. This design also presents some obvious drawbacks:

[0004] 1. Poor appearance and integration: Exposed hooks or clips often disrupt the overall smoothness and aesthetics of the water gun, making it look rather abrupt and reducing the product's industrial design appeal.

[0005] 2. Inconvenient Operation: This type of locking operation usually requires the use of both hands. Users often need to use one hand to continuously press and hold the handle in the desired open position, while using the other hand to operate and secure the hook. This can be very inconvenient, or even difficult, in certain scenarios (such as operating a water gun with one hand on an escalator). Releasing the lock may also require a similar two-step operation, which is not quick enough.

[0006] 3. Limited or Missing Locking Positions: Most simple locking devices can only lock the water gun at full open or a preset high flow rate, lacking the ability to precisely control and lock multiple water flow levels. Many conventional back-pressure water guns mainly offer "on" and "off" states, or only allow changing the spray pattern (such as column, fan, or mist) by rotating the nozzle, without conveniently adjusting the water flow rate. For the few back-pressure water guns with fine-tuning flow rate, their adjustment mechanisms may be quite complex, requiring the rotation of a separate adjustment knob or the movement of an additional slider. These operations often require both hands to coordinate, or at least require the user to interrupt the current spraying action to free their hands for adjustment, resulting in low operational efficiency and a poor user experience.

[0007] Therefore, it is necessary to further improve and perfect the existing technology to overcome these shortcomings, and this utility model is made based on this situation. Utility Model Content

[0008] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a rear-pressure water gun that is easy to operate, has a simple appearance, and can realize multi-level water flow adjustment and reliable self-locking.

[0009] This utility model is achieved through the following technical solution:

[0010] To solve the above-mentioned technical problems, this utility model provides a rear-pressure multi-stage self-locking water gun, including a gun body and a spray head disposed at the front end of the gun body, wherein a main channel is formed inside the gun body.

[0011] A pull rod is slidably connected inside the gun body, and a pressure handle is movably connected to the rear end of the pull rod. Pressing the pressure handle drives the pull rod to move axially along the main channel.

[0012] The pull rod is equipped with a flow regulating valve structure, which is configured to adjust the water outlet state of the main channel as the axial position of the pull rod changes within the main channel.

[0013] The water gun also includes a multi-position self-locking structure, which is configured to selectively lock the lever at any of a plurality of different preset axial positions. The plurality of different preset axial positions correspond to a plurality of different water outlet states controlled by the flow regulating valve structure.

[0014] The multi-position self-locking structure includes a guide seat fixed to the gun body, a guide member connected to the pull rod that cooperates with the guide seat, and a guide path groove for the guide member to move. The guide path groove includes at least two axial sections and a helical section arranged alternately and connected end to end in sequence. The helical section is provided with a plurality of locking teeth for locking the guide member in a preset axial position. By the guide member moving along the guide path groove and cooperating with the locking teeth, the pull rod can switch between multiple preset axial positions and self-lock.

[0015] In order to further solve the technical problems to be solved by this utility model, this utility model provides a rear-pressing multi-stage self-locking water gun, wherein an elastic reset member is provided between the pull rod and the gun body to elastically push the pull rod forward.

[0016] In order to further solve the technical problem to be solved by this utility model, in the multi-stage self-locking water gun provided by this utility model, the axial section of the guide path groove is arranged along the axial direction of the pull rod, and the spiral section extends from the front end of one of the axial sections and connects to the rear end of the other axial section.

[0017] In order to further solve the technical problem to be solved by this utility model, the present utility model provides a rear-pressure multi-stage self-locking water gun, wherein the locking tooth is provided on the front side of the guide path groove and extends rearward, the front side of the locking tooth is an inclined surface, and the rear side of the locking tooth is an axial surface.

[0018] In order to further solve the technical problems to be solved by this utility model, the present utility model provides a rear-pressure multi-stage self-locking water gun, wherein the guide path groove is a continuous guide groove provided on the side wall of the base.

[0019] In order to further solve the technical problems to be solved by this utility model, the present utility model provides a rear-pressure multi-stage self-locking water gun, wherein the guide seat includes a front half seat and a rear half seat that are detachably connected together.

[0020] In order to further solve the technical problems to be solved by this utility model, the present utility model provides a multi-stage self-locking water gun with a rear pressure, wherein the flow regulating valve structure is a piston-type flow regulating valve structure, and includes a valve cavity section disposed in the main channel and having an inner diameter smaller than the inner diameter of the main channel, a valve shaft section disposed at a corresponding position on the pull rod, and a sealing ring sleeved on the pull rod and located on the rear side of the valve shaft section;

[0021] The diameter of the valve shaft section gradually increases from front to back;

[0022] When the sealing ring blocks the rear end of the valve cavity section, the main channel is completely closed; when the sealing ring moves backward out of the valve cavity section, the portion of the valve shaft section extending into the valve cavity section is different, resulting in different water passage gaps, thereby achieving the adjustment of different water flow rates.

[0023] In order to further solve the technical problems to be solved by this utility model, the valve shaft section of the multi-stage self-locking water gun provided by this utility model is a stepped shaft or a conical shaft.

[0024] In order to further solve the technical problems to be solved by this utility model, this utility model provides a rear-pressure multi-stage self-locking water gun, wherein the rear end of the pull rod is provided with an adjustment cap, the middle part of the pressure handle is rotatably connected to the main body of the gun, the upper end of the pressure handle is provided with a hole, the hole is fitted on the pull rod and abuts against the front side of the adjustment cap.

[0025] To further address the technical problems addressed by this utility model, this utility model provides a multi-stage self-locking water gun with a rear pressure setting, wherein the adjusting cap is threadedly connected to the rear end of the pull rod and can adjust the axial position of the adjusting cap.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] This utility model features a built-in multi-level elastic self-locking structure. This structure utilizes a guide member on the pull rod that interacts with a specific guide path groove (including an axial section and a spiral section with multiple locking teeth) on a guide seat fixed inside the gun body, combined with the function of an elastic reset member. When the user presses the lever to move the pull rod backward to adjust the water flow, the guide member smoothly slides over the inclined surface of the locking teeth. Once the user releases the lever at any desired flow level, the elastic reset member pushes the pull rod slightly forward, causing the guide member to be locked by the axial surface of the locking teeth on the spiral section. This achieves convenient selection of multiple water flow levels and reliable self-locking under one-handed operation. Its operation is extremely simple and intuitive; all adjustment and locking actions can be completed with one hand without additional auxiliary operation. It achieves true multi-level precise flow control and stable maintenance. The fully built-in self-locking mechanism makes the overall structure of the water gun compact, with smooth lines and a more concise and aesthetically pleasing appearance, improving user experience and product quality. Attached Figure Description

[0028] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0029] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0030] Figure 2 This is an exploded view of the present invention;

[0031] Figure 3 This is a structural diagram of the tie rod.

[0032] Figure 4 This is one of the structural diagrams of the multi-stage self-locking structure;

[0033] Figure 5 This is the second structural diagram of the multi-stage self-locking structure;

[0034] Figure 6 yes Figure 1 A magnified view of a portion of point A (water shut off);

[0035] Figure 7 yes Figure 6 The first diagram of the usage status (low flow rate status);

[0036] Figure 8 yes Figure 6 The second diagram shows the usage status (high flow rate status). Detailed Implementation

[0037] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Please see Figures 1 to 8 This embodiment provides a rear-pressure multi-level self-locking water gun, which aims to overcome the problems of inconvenient operation, poor appearance, insufficient flow adjustment levels, or complicated operation of the locking mechanism of the rear-pressure water gun in the prior art. It provides a water gun with a simple structure, which can be easily operated by the user with one hand, realizes multi-level flow adjustment and self-locking, and has a simple and beautiful design.

[0039] like Figure 1 and Figure 2 As shown, the rear-pressure multi-stage self-locking water gun of this embodiment mainly includes a gun body 1, a water nozzle (the water nozzle is rotatable and has multiple water spray holes that can spray different water sprays, which is a conventional structure) located at the front end of the gun body 1, and a pressure handle 3 movably connected to the rear of the gun body 1. A main channel 11 for water flow is formed inside the gun body 1.

[0040] Core transmission and flow regulation mechanism:

[0041] like Figures 1-3 As shown, a pull rod 2 is slidably connected inside the gun body 1 along its axial direction. The rear end of the pull rod 2 is movably connected to the pressure handle 3 via a linkage mechanism. In this embodiment, specifically, as shown... Figure 1 , Figure 2 As shown, the rear end of the pull rod 2 is provided with an adjusting cap 21. This adjusting cap 21 is preferably threaded to the rear end of the pull rod 2, allowing for fine-tuning of its axial position on the pull rod 2 by rotating the adjusting cap 21, thereby finely adjusting the initial stroke or pressing depth of the pressure handle 3. The middle part of the pressure handle 3 is rotatably connected to the main body of the gun body 1 via a pin or similar means, forming a lever structure. The upper end of the pressure handle 3 (the end closest to the gun body 1) is provided with a hole 31, which is fitted onto the pull rod 2. During use, this upper part of the pressure handle 3 abuts against the front side of the adjusting cap 21. When the user presses the pressure handle 3 inward, the pressure handle 3 rotates around its pivot point, and its upper end pulls the adjusting cap 21 backward, thereby causing the pull rod 2 to overcome the restoring force (described in detail later) and move axially along the main channel 11 towards the rear end of the gun body 1.

[0042] A flow regulating valve structure 4 is provided on the pull rod 2. This flow regulating valve structure 4 allows it to change the cross-sectional area of ​​the main channel 11 as the axial position of the pull rod 2 changes within the main channel 11, thereby adjusting the water flow state (e.g., flow rate or complete closure) from the spray head.

[0043] like Figure 2 , Figure 6 , Figure 7 and Figure 8 As shown, in this embodiment, the flow regulating valve structure 4 is preferably a piston-type flow regulating valve structure. This structure includes:

[0044] Within the main channel 11, near the front end of the gun body 1, a valve chamber section 41 is formed with an inner diameter smaller than that of other parts of the main channel 11. The rear end of this valve chamber section 41 (near the rear end of the pull rod 2) forms a valve seat sealing surface.

[0045] On the pull rod 2, corresponding to the position of the valve chamber section 41, a valve shaft section 42 is provided. The diameter of this valve shaft section 42 gradually increases from its front end to its rear end (i.e., from the direction near the spray head to the direction near the pressure handle 3). In this embodiment, as... Figures 6-8 As shown, the valve shaft section 42 is specifically a stepped shaft, meaning its outer diameter consists of multiple cylindrical segments with different diameters. Of course, in other embodiments, the valve shaft section 42 can also be designed as a tapered shaft.

[0046] A sealing ring 43 is fitted onto the pull rod 2, and the sealing ring 43 is located on the rear side of the valve shaft section 42. The sealing ring 43 can be made of rubber or a waterproof material with similar elasticity.

[0047] Working principle of the flow control valve structure:

[0048] When the lever 2 is in its forwardmost position (e.g., when the handle 3 is not pressed), the sealing ring 43 presses tightly against the rear valve seat sealing surface of the valve cavity section 41, thereby completely blocking the main channel 11 and shutting off the water flow. Figure 6 As shown.

[0049] When the user presses the handle 3, the pull rod 2 moves backward, and the sealing ring 43 moves backward accordingly, gradually disengaging from the rear valve seat sealing surface of the valve cavity section 41. At this time, water begins to flow through the main channel 11. As the pull rod 2 moves further backward, different diameter portions of the valve shaft section 42 extend backward sequentially or gradually from the valve cavity section 41. Because the diameter of the valve shaft section 42 gradually increases from front to back (or increases in a stepped manner), the size of the annular water passage gap formed between the outer surface of the valve shaft section 42 and the inner wall of the valve cavity section 41 varies depending on the remaining portion of the valve shaft section 42 in the valve cavity section 41. Specifically, the further the valve shaft section 42 moves backward (i.e., the further back the pull rod 2 is), the smaller the diameter of the portion remaining in the valve cavity section 41, resulting in a larger water passage gap and a larger water flow rate. Figure 8 As shown (high flow rate condition). Conversely, when the diameter of the portion remaining in valve cavity section 41 is larger, the water passage gap is smaller, and the outflow rate is also smaller, such as... Figure 7 As shown (low flow rate). In this way, continuous or stepped adjustment of water flow can be achieved.

[0050] Multi-position self-locking structure:

[0051] In order to easily lock the lever 2 in multiple different preset axial positions, thereby achieving stable maintenance of different water flow levels, this water gun also includes a multi-position self-locking structure 5. This multi-position self-locking structure 5 is linked to the lever 2 and can selectively lock the lever 2.

[0052] like Figures 2-5 As shown, the multi-position self-locking structure 5 includes:

[0053] A guide seat 51 is fixedly installed inside the gun body 1, for example by snap-fit ​​or screw fixation. For ease of assembly and maintenance, in this embodiment, the guide seat 51 preferably includes a front half seat 511 and a rear half seat 512 that are detachably connected together.

[0054] A guide member 52 is connected to the pull rod 2 (e.g., fixed to the front end of the pull rod 2, or integrally formed) and slides in engagement with the guide seat 51. In this embodiment, the guide member 52 is preferably a pin or protrusion extending radially from the pull rod 2, or it may be a pin shaft with a radially extending pin or protrusion on the front side (the pin or protrusion engages with the guide path groove 53 described later).

[0055] On the inner or outer peripheral wall of the guide seat 51 (depending on the way the guide member 52 and the guide seat 51 are fitted together, in this embodiment it is the inner wall), a continuous guide path groove 53 is provided for the guide member 52 to move therein.

[0056] The guide path groove 53 has a specific geometry, preferably a closed-loop guide path, which includes at least two (usually more) alternating axial segments 531 and helical segments 532 connected end to end in sequence.

[0057] Axial segment 531: Its direction is roughly along the axial direction of the pull rod 2 (i.e., the length direction of the water gun).

[0058] Spiral segment 532: Its direction has a certain helical angle, extending from the front end of one of the axial segments 531 (the end near the nozzle) and connecting to the rear end of the next adjacent axial segment 531 (the end near the handle).

[0059] On the front sidewall of each spiral segment 532 (i.e., the side that the guide 52 will contact as it moves along the spiral segment), there are multiple (e.g., two, three or more, corresponding to different flow rates) locking teeth 533 for locking the guide 52 in a preset axial position. These locking teeth 533 divide the spiral segment into several stable stopping positions.

[0060] More specifically, the front side of each locking tooth 533 (i.e. the side that the guide 52 may come into contact with when it retracts along the spiral section) is preferably designed as a slope 5331, so that the guide 52 can slide smoothly when the handle 3 drives the lever 2 to retract.

[0061] The rear side of the locking tooth 533 (i.e. the side that the guide 52 will abut against when it has a tendency to move forward under the action of the reset force) is preferably designed as an axial surface 5332 (or a surface close to the axial direction, i.e., perpendicular to the axis of the pull rod 2 or forming a small angle to prevent its forward movement). This way, once the guide 52 retracts past the inclined surface 5331 and falls into the groove between the two locking teeth (or the position between the locking tooth 533 and the rear end of the spiral section), it will be effectively locked by the axial surface 5332 under the action of the elastic reset member, preventing the pull rod 2 from moving forward automatically, thereby achieving self-locking.

[0062] An elastic reset member 54 is also provided between the pull rod 2 and the gun body 1 (or between the pull rod 2 and the guide seat 51). The function of the elastic reset member 54 is to always provide the pull rod 2 with a forward elastic top pressure (i.e., the direction of closing the valve or reducing the flow, which is also the locking direction). In this embodiment, the elastic reset member 54 can be a compression spring, sleeved on the pull rod 2, with one end abutting against the internal structure of the gun body 1 or a certain part of the guide seat 51, and the other end abutting against the shoulder of the pull rod 2 or a component connected thereto. When the guide member 52 is located in the groove formed by the locking teeth 533 of the helical segment 532, the elastic force of the elastic reset member 54 will cause the guide member 52 to abut tightly against the axial surface 5332 of the locking teeth 533, ensuring the reliability of the lock.

[0063] The working process and one-handed operation of the multi-position self-locking structure:

[0064] 1. Initial Closed State: When not in use, the elastic reset member 54 pushes the lever 2 to the foremost position (or the locked position corresponding to the closed position), and the flow regulating valve structure 4 is in the closed state. At this time, the guide member 52 may be located at the front end of a certain axial segment 531 of the guide path groove 53, or at the initial locked position of the first helical segment 532 (i.e., the fully closed position).

[0065] In this embodiment, the front end of the axial segment 531 (which is also the front end of the helical segment 532) is provided with a groove that is biased toward the helical segment 532 so that the guide 52 enters the helical segment 532 instead of the axial segment 531 when it retracts from there.

[0066] 2. Activation and gear shifting:

[0067] The user holds the gun body 1 with one hand and presses the lever 3. The lever 3 drives the pull rod 2 to move backward against the elastic force of the elastic reset member 54. That is, it moves towards the user's hand, which is the direction of increasing the flow rate.

[0068] As the pull rod 2 moves backward, the guide 52 will first move backward along a spiral segment 532.

[0069] As the guide member 52 moves backward along the spiral section 532, it successively passes over the inclined surface 5331 of the locking teeth 533. Due to the design of the inclined surface 5331, the guide member 52 can slide smoothly over these locking teeth. The further the pull rod 2 moves backward, the greater the opening degree of the flow regulating valve structure 4, and the greater the water flow rate.

[0070] Gear Locking: When the user presses the lever 3 to the desired flow rate and then releases or reduces the pressure on the lever 3, the elastic reset member 54 pushes the pull rod 2 forward (in the reset direction). At this time, the guide member 52 also moves forward a short distance with the pull rod 2 until it touches the axial surface 5332 of the locking tooth 533 in front of it (i.e., the first one in the forward direction of the pull rod 2). Due to the blocking effect of the axial surface 5332, the guide member 52 is locked, thereby locking the pull rod 2 in the axial position corresponding to the gear, realizing the continuous output of water flow at that gear.

[0071] Gear Shift (Increase Flow): To further increase the flow rate, the user simply presses the lever 3 again, causing the lever 2 to move backward. The guide 52 will pass over the ramp 5331 of the current locking tooth 533 and subsequent locking teeth, reaching the new desired position. Releasing the lever will lock the new, higher flow rate gear. Each time a locking tooth 533 is passed, a new flow rate gear is entered.

[0072] 3. Turn off the water flow:

[0073] To shut off the water flow, the user can press the lever 3 further down, causing the guide 52 to pass over all the locking teeth of the current spiral segment 532 and reach the rear end of the spiral segment 532. Then, the lever 3 can be released completely. After releasing, under the action of the elastic reset member 54, the guide 52 can enter an unobstructed return path, namely the axial segment 531, and return to the front end of the axial segment 531 (i.e., the fully closed position).

[0074] The rear end of the helical segment 532 usually also has a groove that is biased toward the axial segment 531, so that the guide 52 enters the axial segment 531 instead of the helical segment 532 when it advances from there.

[0075] With the above structural design, users can easily turn on the water gun, select and lock multiple preset flow levels, and turn off the water flow by operating the handle 3 with only one hand. The operation is smooth and natural, requiring no additional auxiliary actions or two-handed operation. At the same time, since the locking mechanism is built into the gun body 1, it does not affect the overall aesthetics and lines of the water gun.

[0076] In summary, the advantages of this embodiment are:

[0077] Easy to operate: You can complete all operations such as turning on, adjusting multiple flow levels, locking and turning off with one hand.

[0078] Intuitive operation: Users control the flow rate by pressing the handle, and releasing the handle automatically locks the flow rate at the current approximate level, which is intuitive.

[0079] Multiple adjustable levels: Multiple locking teeth on the spiral section allow for preset, stable water flow levels to meet different cleaning or irrigation needs.

[0080] Reliable self-locking: The cooperation between the elastic reset element and the locking teeth ensures reliable self-locking in the selected gear position.

[0081] Aesthetically pleasing integrated structure: The self-locking mechanism is built-in, preserving the overall appearance of the water gun.

[0082] Precise flow control: The piston-type flow control valve structure, combined with the stepped (or conical) valve shaft section, can achieve relatively precise flow control.

[0083] It should be noted that the specific number of turns of the guide path groove 53, the number and arrangement of the axial section 531 and the helical section 532, as well as the number and spacing of the locking teeth 533 shown in the attached figure can all be adjusted and designed according to the actual number of gears and operating feel, and are not limited to the specific form shown in the figure.

Claims

1. A rear-pressure multi-stage self-locking water gun, comprising a gun body (1) and a spray head disposed at the front end of the gun body (1), wherein a main channel (11) is formed inside the gun body (1), characterized in that: A pull rod (2) is slidably connected inside the gun body (1), and a pressure handle (3) is movably connected to the rear end of the pull rod (2). By pressing the pressure handle (3), the pull rod (2) is driven to move along the axial direction of the main channel (11). The pull rod (2) is provided with a flow regulating valve structure (4), which is configured to adjust the water outlet state of the main channel (11) as the axial position of the pull rod (2) changes within the main channel (11); The water gun also includes a multi-position self-locking structure (5), which is configured to selectively lock the lever (2) at any of a plurality of different preset axial positions. The plurality of different preset axial positions correspond to a plurality of different water outlet states controlled by the flow regulating valve structure (4). The multi-position self-locking structure (5) includes a guide seat (51) fixed to the gun body (1), and a guide member (52) that cooperates with the guide seat (51) is connected to the pull rod (2). The guide seat (51) is provided with a guide path groove (53) for the guide member (52) to move. The guide path groove (53) includes at least two axial sections (531) and helical sections (532) that are arranged alternately and connected end to end in sequence. The helical section (532) is provided with a plurality of locking teeth (533) for locking the guide member (52) in a preset axial position. By the guide member (52) moving along the guide path groove (53) and cooperating with the locking teeth (533), the pull rod (2) can switch and self-lock between multiple preset axial positions.

2. The multi-stage self-locking water gun according to claim 1, characterized in that: An elastic reset member (54) is provided between the pull rod (2) and the gun body (1) to elastically push the pull rod (2) forward.

3. The multi-stage self-locking water gun according to claim 1, characterized in that: The axial segment (531) of the guide path groove (53) is arranged along the axial direction of the tie rod (2), and the helical segment (532) extends from the front end of one of the axial segments (531) to the rear end of the other axial segment (531).

4. A multi-stage self-locking water gun according to claim 1, characterized in that: The locking tooth (533) is located on the front side of the guide path groove (53) and extends rearward. The front side of the locking tooth (533) is an inclined surface (5331), and the rear side of the locking tooth (533) is an axial surface (5332).

5. A multi-stage self-locking water gun according to claim 1, characterized in that: The guide path groove (53) is a continuous guide groove on the side wall of the guide seat (51).

6. A multi-stage self-locking water gun according to claim 1, characterized in that: The guide seat (51) includes a front half seat (511) and a rear half seat (512) that are detachably connected together.

7. A multi-stage self-locking water gun according to claim 1, characterized in that: The flow regulating valve structure (4) is a piston-type flow regulating valve structure, and includes a valve cavity section (41) provided in the main channel (11) and having an inner diameter smaller than the inner diameter of the main channel (11), a valve shaft section (42) provided at a corresponding position on the pull rod (2), and a sealing ring (43) sleeved on the pull rod (2) and located on the rear side of the valve shaft section (42). The diameter of the valve shaft section (42) gradually increases from front to back; When the sealing ring (43) blocks the rear end of the valve cavity section (41), the main channel (11) is completely closed; when the sealing ring (43) moves backward away from the valve cavity section (41), the valve shaft section (42) extends into the valve cavity section (41) in different ways, forming different water passage gaps, thereby achieving the adjustment of different outflow rates.

8. A multi-stage self-locking water gun with rear pressure as described in claim 7, characterized in that: The valve shaft section (42) is a stepped shaft or a tapered shaft.

9. A multi-stage self-locking water gun according to claim 1, characterized in that: The rear end of the pull rod (2) is provided with an adjustment cap (21), the middle part of the pressure handle (3) is rotatably connected to the main body of the gun body (1), the upper end of the pressure handle (3) is provided with a hole (31), the hole (31) is fitted on the pull rod (2) and abuts against the front side of the adjustment cap (21).

10. A multi-stage self-locking water gun according to claim 9, characterized in that: The adjusting cap (21) is threaded to the rear end of the pull rod (2) and can adjust the axial position of the adjusting cap (21).

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