A paint spray gun that is easy to clean

Abstract

The utility model discloses a paint spraying gun convenient to clean belongs to spraying equipment technical field, including gun body, and the setting in the gun body's ejector pin, paint pipe, spray head and by the air valve switch of trigger control, still include setting in the clean mechanism of paint pipe inside, and clean mechanism includes the swivel ring of rotation connection in the outer wall of ejector pin, and the blade of fixed in the outer wall of swivel ring and abuts to the inner wall of paint pipe, when spraying, the airflow drive blade drives swivel ring rotation to carry out real -time scraping and cleaning to the inner wall of paint pipe, still include setting in the outer wall of spray head's anti -spraying mechanism, realizes the accurate shelter of spraying range through rotatable baffle. The utility model discloses through above -mentioned structure, solved the problem of paint adhesion solidification, difficult to clean, not only realized the dynamic self -cleaning in the spraying process, simplified the maintenance process, also improved the convenience and accuracy of fine operation, has very high practical value.

Description

Technical Field

[0001] This utility model relates to the field of spraying equipment technology, and in particular to a spray gun that is easy to clean. Background Technology

[0002] As a surface coating tool widely used in the automotive, furniture, and construction industries, the paint spray gun atomizes paint and sprays it evenly onto the surface of an object using high-pressure gas to achieve an efficient and smooth coating effect. During the operation of the paint spray gun, liquid paint needs to flow from the paint bottle through the paint tube inside the gun body and finally reach the nozzle to be atomized and sprayed out. The paint itself has a certain viscosity and adhesion. After long-term continuous or intermittent use, an adhesion layer will inevitably form on the inner wall of the paint tube.

[0003] As the work progresses, this layer of residue will gradually thicken and solidify. In particular, some fast-drying or high-solids paints are more likely to form stubborn stains that are difficult to remove. These solidified paint residues will not only reduce the effective flow cross-section of the paint pipeline and affect the stability of paint output, resulting in poor spraying effect, but in severe cases, they may even completely block the pipeline, making the paint gun unable to work properly.

[0004] The conventional approach to this problem is to disassemble the paint gun after use and manually clean the paint lines using a special cleaning agent and brushes. This method is not only cumbersome and time-consuming, but also often leaves cleaning dead spots in the complex internal structure of the lines, making it difficult to achieve a thorough cleaning and resulting in unsatisfactory cleaning effects. Existing paint guns generally lack a mechanism to actively prevent or remove internal paint adhesion, resulting in poor cleaning performance and increasing the user's usage and maintenance costs.

[0005] Therefore, this utility model proposes a spray gun that is easy to clean in order to overcome the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems in the prior art where paint adheres and solidifies on the inner wall of the paint pipe of the spray gun, resulting in cumbersome cleaning operations, easy blockage, and affecting the spraying quality, this utility model aims to provide a spray gun with an improved structure that can effectively solve the above problems and is easy to clean.

[0007] This utility model provides a spray gun that is easy to clean, including: a gun body, a paint bottle, a paint tube, a nozzle, a trigger, an air valve switch and a ejector pin; and a cleaning mechanism disposed inside the paint tube.

[0008] The gun body serves as an integral mounting platform, with a paint bottle mounted on its top and a trigger rotatably connected to its outer wall. Inside, it houses the paint tube, nozzle, air valve switch, and ejector pin. The trigger and the rear end of the ejector pin are linked by a hinge. When the trigger is pressed, the ejector pin moves backward along its axis to expose the nozzle's nozzle opening.

[0009] The cleaning mechanism is a self-cleaning mechanism. It includes a rotating ring and blades fixedly connected to the outer wall of the rotating ring. The rotating ring is rotatably connected to the outer wall of the ejector pin, while the free end of the blade extends to and abuts against the inner wall of the paint tube. When the air valve is opened, the high-speed airflow blows the blades as it flows through the paint tube, thereby driving the entire cleaning mechanism to rotate at high speed around the ejector pin. Through the continuous scraping action between the blades and the inner wall of the paint tube, dynamic cleaning of paint deposits is achieved.

[0010] Preferably, the number of blades is at least two, and they are distributed along the circumferential angle of the rotating ring. This evenly distributed design makes the cleaning mechanism more uniformly stressed and more stable when rotating at high speed. At the same time, it can also ensure a more comprehensive scraping coverage of the inner wall of the paint pipe without cleaning dead corners, thereby improving the overall cleaning efficiency and effect.

[0011] Preferably, the easy-to-clean paint gun also includes a spray guard mechanism integrally set on the outer wall of the nozzle. The addition of the spray guard mechanism enables the paint gun to not only achieve self-cleaning function, but also to further integrate the function of accurately masking the spraying range, thereby improving the overall practicality of the device.

[0012] In one specific implementation, the anti-spray mechanism includes a baffle, a first coupling, a second coupling, a catch, and an anti-contact block. The first coupling is fixed to the top of the nozzle and is rotatably connected to the catch; the baffle is rotatably connected to the outer wall of the nozzle through the second coupling; and the anti-contact block is fixed on both sides of the outer wall of the nozzle. These components work together to form a complete and adjustable shielding system.

[0013] Preferably, the hook and the baffle are detachably locked through a corresponding snap-fit ​​structure. When the baffle is not needed, the hook can securely lock it in the storage position to prevent it from shaking or accidentally unfolding. When the baffle needs to be covered, it can be easily unlocked, allowing the baffle to rotate freely, making the operation convenient and reliable.

[0014] Preferably, the rotational connection between the second coupling and the baffle is a damped connection. This damped design allows the baffle to remain stably suspended after rotating to any angle, without shifting its position due to airflow impact or equipment vibration, thus ensuring the accuracy and stability of the shielding.

[0015] Preferably, the anti-collision block is positioned on the outside of the baffle when it is in the retracted state locked by the hook. This arrangement allows the anti-collision block to act as a physical barrier, effectively protecting the internal baffle from direct impact when the spray gun is placed or encounters an accidental collision, thereby improving the durability and service life of the anti-spray mechanism.

[0016] Preferably, there are two of each of the baffle, the coupling, and the hook, and they are arranged symmetrically with the central axis of the nozzle as the center. This symmetrical structural design not only makes the overall appearance of the anti-spray mechanism more harmonious, but also ensures that the shielding range and effect on both sides of the nozzle can be kept consistent during shielding operations, which is particularly suitable for working conditions that require symmetrical spraying.

[0017] This utility model has the following beneficial effects:

[0018] 1. This utility model solves the problem in the prior art where paint adheres to and solidifies on the inner wall of the paint tube after prolonged use of the paint gun, leading to difficult cleaning, easy clogging, and affecting the spraying quality. It achieves automatic cleaning of the paint pipeline during spraying operations, simplifies the maintenance process, and ensures smooth spraying.

[0019] 2. This utility model solves the problem in the prior art that when performing fine spraying or edge work, it is difficult to accurately control the spray range, requiring additional shielding materials for auxiliary shielding, which is cumbersome and inefficient. This is achieved by setting a baffle that can be rotated and adjusted at an adjustable angle and can be stably suspended on the outer wall of the nozzle, and locking it with a hook. The shielding function is integrated into the gun body, which can conveniently and quickly perform local shielding, improve the accuracy and efficiency of spraying operations.

[0020] 3. This utility model solves the problem that exposed moving parts of the baffle are easily damaged when the spray gun is placed or accidentally collided, leading to functional failure or reduced accuracy, by setting anti-touch blocks on both sides of the nozzle to provide structural protection for the baffle in the stored state. This improves the durability and reliability of the entire anti-spray mechanism and ensures the long-term stability of the device. Attached Figure Description

[0021] Figure 1 This is a perspective view of a spray gun that is easy to clean, as proposed in this utility model.

[0022] Figure 2 This is an exploded view of the cleaning mechanism for a spray gun that is easy to clean, as proposed in this utility model.

[0023] Figure 3 This is an exploded view of the anti-spray mechanism for a paint gun that is easy to clean, as proposed in this utility model.

[0024] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0025] Legend:

[0026] 1. Gun body; 2. Cleaning mechanism; 201. Trigger; 202. Ejector pin; 203. Blade; 204. Rotary ring; 205. Paint tube; 206. Nozzle; 207. Air valve switch; 3. Anti-spray mechanism; 301. Baffle; 302. Coupling one; 303. Coupling two; 304. Hook; 305. Anti-contact block; 4. Paint bottle. Detailed Implementation

[0027] 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.

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0029] Example:

[0030] Please refer to Figures 1 to 4 This utility model provides a spray gun that is easy to clean, which aims to solve the problem that the inner wall of the paint tube 205 of the existing spray gun is easily covered with cured paint after long-term use and is difficult to clean.

[0031] like Figure 1As shown, an easy-to-clean spray gun includes a gun body 1 as the overall mounting base, a paint bottle 4 mounted on the top of the gun body 1, and a set of functional components disposed inside the gun body 1; the paint bottle 4 is used to store paint and allow the paint to flow into the gun body 1 by gravity; a trigger 201 for controlling the spraying operation is rotatably connected to the outer wall of the gun body 1; a ejector pin 202 is disposed through the gun body 1 along its length, and a paint tube 205, a nozzle 206, and an air valve switch 207 are also disposed inside the gun body 1; the rear end of the ejector pin 202 is hinged to the upper end of the trigger 201, and when the trigger 201 is pressed, the trigger 201 drives the ejector pin 202 to move backward along its axis, which exposes the nozzle 206 and triggers the air valve switch 207 to open; the spray gun also includes a cleaning mechanism 2 and a spray guard mechanism 3.

[0032] Reference Figure 2 The cleaning mechanism 2 is located inside the paint tube 205 and includes a rotating ring 204 and blades 203 fixedly connected to the outer wall of the rotating ring 204. The rotating ring 204 has a ring structure and is rotatably connected to the outer wall of the ejector pin 202, and can rotate freely around the ejector pin 202 as the axis. There are at least two blades 203, which are distributed along the circumferential angle of the rotating ring 204. The blades 203 extend from the outer wall of the rotating ring 204, and the outline of their free ends is adapted to the inner wall of the paint tube 205 and abuts against the inner wall of the paint tube 205. During operation, the high-speed airflow generated after the air valve switch 207 is opened will continuously blow the blades 203 when it flows through the paint tube 205, thereby driving the blades 203 to drive the rotating ring 204 to rotate at high speed around the ejector pin 202. The rotating blades 203 are like dynamic scrapers, which can scrape and clean the inner wall of the paint tube 205 in real time to prevent paint from adhering and curing.

[0033] Please refer to Figure 3 and Figure 4The anti-spray mechanism 3 includes a baffle 301, a first coupling 302, a second coupling 303, a hook 304, and an anti-contact block 305. There are two first couplings 302, which are fixedly connected to the top of the nozzle 206 in a symmetrical manner with the central axis of the nozzle 206 as the center. There are also two hooks 304, which are rotatably connected to the inner walls of the two first couplings 302 respectively, used to lock or unlock the baffle 301. There are also two baffles 301, which are rotatably connected to the outer wall of the nozzle 206 through multiple second couplings 303. The rotatable connection is a damped connection, so that the baffle 301, when pushed... After moving to any blocking angle, it can hover stably by its own damping and will not easily change position due to airflow or vibration. A locking structure is provided on the baffle 301 at the position corresponding to the hook 304. When blocking is not needed, the hook 304 locks into the locking structure, thereby firmly locking the baffle 301 in the storage position. Two anti-touch blocks 305 are also fixedly connected to both sides of the outer wall of the nozzle 206. The anti-touch blocks 305 are set on the outside when the baffle 301 is in the storage state locked by the hook 304. Its structure can effectively protect the baffle 301 in the storage state and prevent accidental external contact from damaging the baffle 301.

[0034] As a preferred embodiment, in order to further improve the scraping effect of the cleaning mechanism 2, the blade 203 is preferably made of a solvent-resistant elastic polymer material, and its free end that abuts against the inner wall of the paint tube 205 has a certain toughness, so that it can closely fit the tube wall when rotating and effectively scrape off the paint with different viscosities.

[0035] As another preferred embodiment, in order to ensure the reliability and convenience of operation of the blowout preventer 3, the locking engagement between the hook 304 and the baffle 301 is achieved by setting a groove on the baffle 301 and a corresponding protrusion on the hook 304; at the same time, the damping connection between the coupling 2 303 and the baffle 301 is achieved by setting a set of friction pads inside the coupling 2 303, thereby providing stable and clearly tactile adjustment resistance for the rotation of the baffle 301.

[0036] As another preferred embodiment, in order to enhance the protective effect on the baffle 301, the anti-contact block 305 is preferably designed as an arc-shaped rib structure extending outward from the outer wall of the nozzle 206. The height of its outer contour is slightly higher than that of the baffle 301 in the stored state, so that it can preferentially contact external objects when the spray gun is placed or when an accidental collision occurs, thereby avoiding direct impact that could cause deformation or damage to the baffle 301.

[0037] In addition, as a preferred layout, the baffle 301, coupling 302 and hook 304 are all symmetrically arranged with the central axis of the nozzle 206 as the center. This symmetrical layout not only makes the structure of the entire anti-spray mechanism 3 more stable and balanced, but also ensures that the blocking effect on both sides of the nozzle 206 is consistent when the blocking operation is performed, which makes it convenient for the user to perform precise symmetrical area spraying operations.

[0038] Working principle: When using the spray gun, the paint bottle 4 is installed on the top of the gun body 1, allowing a small amount of paint from the bottle 4 to flow evenly into the paint tube 205 fixedly connected to the inner wall of the gun body 1. By pressing the trigger 201, which is rotated and connected to the outer wall of the gun body 1, the air valve switch 207 on the inner wall of the gun body 1 is activated. Since the ejector pin 202 is connected to the trigger 201, pressing the trigger 201 moves the ejector pin 202 backward, exposing the nozzle. Gas is then sprayed out along the paint tube 205 towards the nozzle 206. The blade 203 is fixedly connected to the outer wall of the rotating ring 204, and the rotating ring 204 is rotatably connected to the outer wall of the ejector pin 202. At the same time, the gas blows the blade 203 to drive the rotating ring 204 to rotate on the outer wall of the ejector pin 202. The two blades 203 clean the paint adhering to the inner wall of the paint tube 205. Releasing the trigger 201 closes the air valve switch 207 to stop the paint from being sprayed. The cleaning mechanism 2 solves the problem of stubborn paint adhering to the inner wall of the paint tube 205 after long-term use in the prior art.

[0039] Furthermore, when masking is required during spraying, the two hooks 304 are activated. Since both hooks 304 are rotatably connected to the inner walls of the two couplings 302, which are fixedly connected to the top of the nozzle 206, the hooks 304 are rotated through the two couplings 302 and separated from the two baffles 301. Since the two baffles 301 are rotatably connected to the outer walls of the nozzle 206 through multiple couplings 303, the separated baffles 301 can be rotated to a suitable angle to mask excess spraying areas. The rotational connection between the couplings 303 and the baffles 301 provides a certain resistance, preventing the baffles 301 from rotating on their own when the angle is adjusted. The anti-contact blocks 305 fixedly connected to both sides of the nozzle 206 prevent external forces from damaging the baffles 301 when they are not rotating. The anti-spray mechanism 3 solves the problem in the prior art that the spray gun cannot be controlled in some areas where spraying is not required.

Claims

1. A spray gun that is easy to clean, comprising: Gun body (1), paint bottle (4) installed on the top of the gun body (1), and paint tube (205) and nozzle (206) disposed inside the gun body (1). The outer wall of the gun body (1) is rotatably connected to a trigger (201), and the inside of the gun body (1) is provided with a gas valve switch (207) and a ejector pin (202). The rear end of the ejector pin (202) is hinged to the upper end of the trigger (201). When the trigger (201) is pressed, it drives the ejector pin (202) to move backward along its axis so that the nozzle (206) is exposed. The paint gun is characterized in that it further includes a cleaning mechanism (2) disposed inside the paint tube (205). The cleaning mechanism (2) includes a rotating ring (204) and a blade (203) fixedly connected to the outer wall of the rotating ring (204). The rotating ring (204) is rotatably connected to the outer wall of the ejector pin (202). The free end of the blade (203) abuts against the inner wall of the paint tube (205). When the air valve switch (207) is opened, the gas flowing through the paint tube (205) blows the blade (203) to drive the rotating ring (204) to rotate and scrape and clean the inner wall of the paint tube (205).

2. The easy-to-clean spray gun according to claim 1, characterized in that, The number of blades (203) is at least two, and they are distributed along the circumferential angle of the swivel (204).

3. The easy-to-clean spray gun according to claim 1, characterized in that, The paint spray gun also includes a spray protection mechanism (3) disposed on the outer wall of the spray nozzle (206).

4. A spray gun that is easy to clean according to claim 3, characterized in that, The anti-spray mechanism (3) includes a baffle (301), a first coupling (302), a second coupling (303), a hook (304), and an anti-contact block (305). The first coupling (302) is fixedly connected to the top of the nozzle (206), and the hook (304) is rotatably connected to the inner wall of the first coupling (302). The baffle (301) is rotatably connected to the outer wall of the nozzle (206) through the second coupling (303). The anti-contact block (305) is fixedly connected to both sides of the outer wall of the nozzle (206).

5. A spray gun that is easy to clean according to claim 4, characterized in that, The hook (304) is used to engage with the corresponding snap-fit ​​structure on the baffle (301) in the unobstructed state to lock the baffle (301).

6. A spray gun that is easy to clean according to claim 4, characterized in that, The rotational connection between the second coupling (303) and the baffle (301) is a damped connection, so that the baffle (301) can be stably suspended after rotating to any angle.

7. A spray gun that is easy to clean according to claim 4, characterized in that, The anti-touch block (305) is disposed on the outside of the baffle (301) when it is in the storage state locked by the hook (304), and is used to provide protection for the baffle (301).

8. A spray gun that is easy to clean according to claim 4, characterized in that, The number of the baffle (301), the coupling (302) and the hook (304) are all two, and they are arranged symmetrically with the central axis of the nozzle (206) as the center.

Images