A portable foaming gun

Abstract

The application discloses a portable foaming gun, wherein the inside of the bottle fixing part of the shell is provided with a nozzle, the bottle fixing part can be fixedly connected with a foaming agent bottle; a trigger is fixed on the handle part, the trigger can realize displacement under external force triggering, a booster is arranged in the handle part, an L-shaped cavity is arranged in the handle part, a pressure rod and a thrust rod are arranged in the L-shaped cavity, and the contact surface is an inclined surface; the pressure rod extends to the movable end of the trigger, and a spring is arranged on the thrust rod; under the pushing of the trigger, the pressure rod can drive the thrust rod to move to compress the spring, and at the same time, the nozzle is pushed through the top end to press the output valve, so that the foaming agent is output. Through the technical scheme of the application, the time, the spraying amount and the times of foaming can be more flexibly controlled, the waste and abuse of the foaming agent are avoided, the efficiency of the force is improved, the possibility of damage of the foaming gun is reduced, the foaming agent bottle can be more conveniently installed and dismounted, and the foaming gun can be reused through replacement of the nozzle.

Description

Technical Field

[0001] This invention relates to the field of foam molding equipment technology, and more particularly to a portable foam gun. Background Technology

[0002] Foaming agent is a commonly used building material used for filling, sealing, and bonding. It is typically sold in bottles and requires a specialized foam gun to dispense the foam. A foam gun is a device with a nozzle and trigger; the dispenser valve of the bottled foaming agent is connected to the nozzle, and the trigger controls the flow rate and speed of the foam. While using a foam gun can improve foaming efficiency and quality, it also presents some challenges. For example, foam guns are relatively complex, require an air or electricity source to operate, and are inconvenient to carry and use; cleaning and maintenance are also cumbersome, and failure to clean them regularly can lead to nozzle clogging or damage; furthermore, foam guns are relatively expensive, making them unsuitable for small-scale or temporary use.

[0003] Therefore, a simplified foam gun currently exists, which directly connects the output valve of the bottled foaming agent to a plastic tube, and outputs foam by manually squeezing the bottle. While this simplified foam gun is simple in structure, low in cost, and easy to carry and use, it also has some drawbacks. For example, the one-piece design makes it impossible to disassemble or replace components, easily leading to clogging and inconvenient cleaning; the force of manually squeezing the bottle is difficult to control, easily causing unstable foaming flow and speed, affecting the foaming effect; traditional foam guns require a special cleaning agent after use to remove the foaming agent from the gun to prevent it from hardening and clogging the pipes, making the process cumbersome; once the foaming agent hardens, it cannot be reused, and the hardened foaming agent inside the chamber will block the pipes and cannot be cleaned or treated; manually squeezing the bottle is also relatively strenuous, leading to hand fatigue after prolonged use; in addition, manually squeezing the bottle can also cause deformation or damage to the bottle, affecting the internal air pressure and sealing, and reducing the lifespan of the foaming agent. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a portable foam gun. A trigger controls the start and stop of the booster, allowing for more flexible control of foaming time, spray volume, and number of sprays, avoiding waste and misuse of the foaming agent. The booster transmits pressure to the nozzle in a simpler and more direct manner, improving efficiency and reducing the likelihood of damage. A housing secures the foaming agent bottle and nozzle, facilitating easy installation and removal while ensuring a tight seal between them.

[0005] To achieve the above objectives, the present invention provides a portable foam gun, comprising: a housing, a nozzle, a trigger, an booster, a pressure rod, a push rod, and a spring;

[0006] The housing is divided into a bottle fixing part and a handle part. The nozzle is provided inside the bottle fixing part. The bottle fixing part can be fixedly connected to the foaming agent bottle, and at the same time, the output valve of the foaming agent bottle is tightly connected to the foaming input end of the nozzle.

[0007] The trigger is fixed to one side of the handle portion, and one end of the trigger is a movable end. The movable end can achieve displacement within the elastic range under the triggering of external force. The booster is provided inside the handle portion.

[0008] The booster has an L-shaped cavity inside, and through holes are provided at both ends of the L-shaped cavity. The pressure rod and the thrust rod are respectively arranged perpendicularly to each other in the L-shaped cavity and contact each other at the right angle of the L-shaped cavity. The contact surfaces of the pressure rod and the thrust rod are set as matching inclined surfaces.

[0009] The end of the pressure rod away from the contact surface passes through the first through hole of the L-shaped cavity and extends into the elastic range of the trigger movable end; the end of the push rod away from the contact surface passes through the second through hole of the L-shaped cavity; and the spring is engaged between the push rod and the second through hole.

[0010] When the trigger is displaced, the pressure rod can drive the push rod to move through the relative sliding of the contact surfaces to compress the spring and push out the second through hole.

[0011] The actuating end of the nozzle opposite to the foaming input end contacts the thrust rod passing through the second through hole. A foaming output end is provided on the side of the nozzle, and the foaming output end is connected to the foaming input end.

[0012] The thrust rod that pushes out of the second through hole can push the nozzle through the actuating end to apply pressure to the output valve, so that the foaming agent in the foaming agent bottle is output through the foaming output end.

[0013] In the above technical solution, preferably, the portable foam gun also includes a plastic tube, which is connected to the foam output end.

[0014] In the above technical solution, preferably, the bottle fixing part is fixedly connected to the foaming agent bottle by a threaded connection.

[0015] In the above technical solution, preferably, the pressure rod is divided into two parts: a first pressure rod body and a second pressure push rod. The shape and size of the first pressure rod body are adapted to the shape and size of the corresponding position of the L-shaped cavity. The second pressure push rod passes through the first through hole and contacts the movable end of the trigger.

[0016] The thrust rod is divided into two parts: a first thrust rod body and a second thrust push rod. The shape and size of the first thrust rod body are adapted to the shape and size of the corresponding position of the L-shaped cavity. The second thrust push rod passes through the second through hole and contacts the pushing end of the nozzle. The cross-sectional size of the second thrust push rod is smaller than the cross-sectional size of the first thrust rod body and forms an outer end face at the junction. The spring is engaged between the outer end face and the inner end face of the second through hole.

[0017] In the above technical solution, preferably, the booster is formed by assembling an upper shell and a lower shell to form the L-shaped cavity, and the upper shell and the lower shell are fixed together by a snap fastener.

[0018] In the above technical solution, preferably, the inclined plane angle between the pressure rod and the thrust rod is 30° to 60°.

[0019] In the above technical solution, preferably, the inclined plane angle between the pressure rod and the thrust rod is 45°.

[0020] In the above technical solution, preferably, the spring is a compression spring. When the trigger is not triggered, the spring is in a naturally extended state. When the trigger is triggered, the spring can be compressed by the push rod. When the trigger is deactivated, the spring pushes the push rod back into the second through hole and drives the pressure rod out of the first through hole, while the trigger returns to its original state.

[0021] In the above technical solution, preferably, the nozzle is fixed to the fixed part of the bottle body in a detachable manner.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] 1. An assist device is used to transmit the pressure of the nozzle, and the force transmission method of the pressure rod and the push rod is simpler and more direct, which improves the efficiency of force application and reduces the possibility of damage to the foam gun;

[0024] 2. A trigger is used to control the start and stop of the booster, which allows for more flexible control of foaming time, spray volume and number of sprays, avoiding waste and abuse of foaming agent;

[0025] 3. A housing is used to fix the foaming agent bottle and nozzle, which makes it easier to install and remove the foaming agent bottle, ensures the seal between the foaming agent bottle and the nozzle, and extends the service life of the foaming agent gun;

[0026] 4. The simple structure and parts make it easier to manufacture and maintain, reducing costs and weight while increasing portability and durability;

[0027] 5. By replacing the nozzle, it is not necessary to clean the nozzle and plastic tube with cleaning fluid after each use. Simply replace the nozzle with a new one for reuse, making the process convenient.

[0028] 6. The nozzle, which serves as the output part of the foaming agent, is structurally isolated from the trigger and booster, which serve as the control parts. This not only facilitates nozzle replacement but also reduces the likelihood of mutual interference, thereby lowering the possibility of damage to the foaming gun and the difficulty of repair after damage. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of a portable foam gun disclosed in one embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the application state of a portable foam gun disclosed in one embodiment of the present invention;

[0031] Figure 3 This is a three-dimensional structural diagram of a portable foam gun after removing the shell, according to an embodiment of the present invention.

[0032] Figure 4 This is a three-dimensional structural diagram of the opening booster of a portable foam gun disclosed in an embodiment of the present invention;

[0033] Figure 5 This is a cross-sectional structural diagram of a portable foam gun in use according to an embodiment of the present invention.

[0034] In the diagram, the correspondence between the components and the reference numerals is as follows:

[0035] 1. Shell; 11. Bottle fixing part; 12. Handle part; 2. Nozzle; 21. Foaming input end; 22. Pushing end; 23. Foaming output end; 3. Trigger; 31. Movable end; 4. Booster; 41. L-shaped cavity; 42. First through hole; 43. Second through hole; 5. Pressure rod; 51. First pressure rod body; 52. Second pressure push rod; 6. Thrust rod; 61. First thrust rod body; 62. Second thrust push rod; 63. Contact surface; 7. Spring; 8. Foaming agent bottle body; 81. Output valve; 9. Plastic tube; 10. Buckle. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] The present invention will now be described in further detail with reference to the accompanying drawings:

[0038] like Figure 1 and Figure 2 As shown, a portable foam gun according to the present invention includes: a housing 1, a nozzle 2, a trigger 3, a booster 4, a pressure rod 5, a push rod 6, and a spring 7;

[0039] The housing 1 is divided into a bottle fixing part 11 and a handle part 12. The bottle fixing part 11 is equipped with a nozzle 2. The bottle fixing part 11 can be fixedly connected to the foaming agent bottle 8, and at the same time, the output valve 81 of the foaming agent bottle 8 is tightly connected to the foaming input end 21 of the nozzle 2.

[0040] A trigger 3 is fixed on one side of the handle part 12. One end of the trigger 3 is a movable end 31. The movable end 31 can achieve displacement within the elastic range under the triggering of external force. An assist device 4 is set inside the handle part 12.

[0041] The booster 4 has an L-shaped cavity 41 inside, and through holes are provided at both ends of the L-shaped cavity 41. The pressure rod 5 and the thrust rod 6 are respectively arranged perpendicularly in the L-shaped cavity 41 and contact each other at the right angle of the L-shaped cavity 41. The contact surface 63 of the pressure rod 5 and the thrust rod 6 is set as a matching inclined surface.

[0042] The end of the pressure rod 5 away from the contact surface 63 passes through the first through hole 42 of the L-shaped cavity 41 and extends into the elastic range of the movable end 31 of the trigger 3. The end of the push rod 6 away from the contact surface 63 passes through the second through hole 43 of the L-shaped cavity 41, and a spring 7 is engaged between the push rod 6 and the second through hole 43.

[0043] When the trigger 3 is displaced, the pressure rod 5 can drive the push rod 6 to move through the relative sliding of the contact surface 63 to compress the spring 7 and push out the second through hole 43.

[0044] The actuating end 22 on the nozzle 2 opposite to the foaming input end 21 is in contact with the thrust rod 6 passing through the second through hole 43. A foaming output end 23 is provided on the side of the nozzle 2, and the foaming output end 23 is connected to the foaming input end 21.

[0045] The push rod 6 that pushes out the second through hole 43 can push the nozzle 2 through the push end 22 to apply pressure to the output valve 81, so that the foaming agent in the foaming agent bottle 8 is output through the foaming output end 23.

[0046] In this embodiment, the trigger 3 controls the start and stop of the booster 4, allowing for more flexible control of the foaming time, spray volume, and number of sprays, avoiding waste and misuse of the foaming agent. The booster 4 transmits pressure to the nozzle 2 in a simpler and more direct way, improving the efficiency of force application and reducing the possibility of damage to the foam gun. The housing 1 secures the foaming agent bottle 8 and the nozzle 2, facilitating easier installation and removal of the bottle and ensuring a tight seal between them. Furthermore, the nozzle 2, as the output part of the foaming agent, is structurally isolated from the trigger 3 and booster 4, which are the control parts. This not only facilitates nozzle 2 replacement but also minimizes mutual interference, reducing the possibility of foam gun damage and the difficulty of repair after damage.

[0047] Specifically, in the implementation process, before use, the foaming agent bottle 8 is fixed to the foaming gun via the bottle fixing part 11. During use, the portable foaming gun is held via the handle part 12. To facilitate control of the foaming output process, the trigger 3 is preferably located on the same side of the housing 1 as the foaming output end 23. When the trigger 3 is pulled (i.e., when holding the handle part 12, a force is applied to the movable end 31 of the trigger 3 with a finger), the triggering force or triggering stroke of the trigger 3 can be adjusted in a timely manner according to whether foaming is output from the foaming output end 23 and the amount of foam.

[0048] When trigger 3 is pulled, the movable end 31 of trigger 3 presses the pressure rod 5 back into the L-shaped cavity 41 of the booster 4. The retraction of the pressure rod 5 will apply a force perpendicular to the inclined plane to the push rod 6 through the inclined surface of the contact surface 63. Under the limiting action of the L-shaped cavity 41, the push rod 6 will push out of the second through hole 43 along the L-shaped cavity 41 under the action of the force perpendicular to the inclined plane. At the same time, the nozzle 2 will be driven by the push end 22 to pressurize the output valve 81 of the foaming agent bottle 8. When the output valve 81 of the foaming agent bottle 8 is pressured and moves inward, the higher pressure foam in the bottle will enter the nozzle 2 through the output valve 81 and be output to the foaming output end 23 through the foaming input end 21, thereby realizing the foaming output and applying the foam to the required position.

[0049] like Figure 3 and Figure 4As shown, in this process, in order for the pressure rod 5 to push the thrust rod 6 towards the nozzle 2, the inclined surface of the pressure rod 5 relative to the thrust rod 6 needs to be oriented towards the nozzle 2. In addition, a travel space needs to be left on the long side of the inclined surface of the pressure rod 5 at the right-angle bend of the L-shaped cavity 41. That is, a cavity needs to be left more than the L-shaped cavity 41 to form a cavity similar to "┴", so that the pressure rod 5 can smoothly push the front end of the thrust rod 6 out of the second through hole 43.

[0050] The output valve 81 of the foaming agent bottle 8 is a conventional technical means in this field. In the prior art, this type of gas cylinder valve has a general technical national standard, and the specific structure and principle of the output valve 81 will not be described in detail here.

[0051] In the above embodiments, preferably, the portable foam gun also includes a plastic tube 9, which is connected to the foam output end 23. The length of the plastic tube 9 is specifically selected by those skilled in the art according to the specific implementation scenario. The plastic tube 9 allows the foam to be easily sprayed to a designated location, and allows for easy replacement of plastic tubes 9 of different lengths or specifications, or easy replacement when the plastic tube 9 is clogged.

[0052] like Figure 5 As shown, in the above embodiment, preferably, the bottle fixing part 11 is fixedly connected to the foaming agent bottle 8 by a threaded connection. Specifically, during implementation, a threaded interface can be installed around the output valve 81 of the foaming agent bottle 8, and the bottle fixing part 11 is provided with a threaded opening adapted to the threaded interface, thereby connecting the foaming agent bottle 8 to the housing 1 of the foaming gun. It should be noted that the threaded connection structure of the bottle fixing part 11 should ensure that the foaming input end 21 of the nozzle 2 is tightly connected to the output valve 81 after connection.

[0053] Moreover, preferably, the foaming input end 21 of the nozzle 2 can be configured to include a connection port and a connection sleeve. The connection port is connected to the output port of the output valve 81, and the connection sleeve is tightly fitted on the outer edge of the output valve 81. This can not only ensure the connection stability between the connection port and the output valve 81, but also serve as a positioning structure for the connection between the connection port and the output valve 81, facilitating the connection process between the two.

[0054] In the above embodiment, preferably, the pressure rod 5 is divided into two parts: a first pressure rod body 51 and a second pressure push rod 52. The shape and size of the first pressure rod body 51 are adapted to the shape and size of the corresponding position of the L-shaped cavity 41. The second pressure push rod 52 passes through the first through hole 42 and contacts the movable end 31 of the trigger 3.

[0055] The thrust rod 6 is divided into two parts: the first thrust rod body 61 and the second thrust push rod 62. The shape and size of the first thrust rod body 61 are adapted to the shape and size of the corresponding position of the L-shaped cavity 41. The second thrust push rod 62 passes through the second through hole 43 and contacts the actuating end 22 of the nozzle 2. The cross-sectional size of the second thrust push rod 62 is smaller than the cross-sectional size of the first thrust rod body 61 and forms an outer end face at the junction. The spring 7 is locked between the outer end face and the inner end face of the second through hole 43.

[0056] Preferably, the first pressure rod body 51 and the second pressure push rod 52 of the pressure rod 5 are set as cylindrical structures with different diameters, the diameter of the first pressure rod body 51 being larger than the diameter of the second pressure push rod 52; the first thrust rod body 61 and the second thrust push rod 62 of the thrust rod 6 are set as cylindrical structures with different diameters, the diameter of the first thrust rod body 61 being larger than the diameter of the second thrust push rod 62; and the spring 7 is engaged on the annular end face formed by the first thrust rod body 61 and the second thrust push rod 62.

[0057] In the above embodiment, preferably, the booster 4 is formed by assembling an upper shell and a lower shell to form an L-shaped cavity 41, and the upper shell and the lower shell are fixed together by a snap fastener 10. The assembled booster 4 allows for easy disassembly of its L-shaped cavity 41 to replace or adjust the pressure rod 5, the thrust rod 6, and / or the spring 7. The booster 4 itself can also be fixed inside the handle portion 12 of the outer shell by the snap fastener 10.

[0058] In the above embodiments, preferably, the inclined plane angle between the pressure rod 5 and the thrust rod 6 is 30° to 60°, and more preferably 45°, so that the pressure rod 5 can stably and uniformly push the thrust rod 6, thereby achieving stable control of the foaming spraying process.

[0059] In the above embodiment, preferably, the spring 7 is a compression spring 7. When the trigger 3 is not triggered, the spring 7 is in a naturally extended state. When the trigger 3 is triggered, it can be compressed by the push rod 6. When the trigger 3 is released from the triggered state, the push rod 6 is pushed back to the second through hole 43, and the pressure rod 5 is pushed out of the first through hole 42. At the same time, the trigger 3 returns to its original state.

[0060] In the above embodiments, preferably, the nozzle 2 is fixed to the bottle body fixing part 11 in a detachable manner, such as by a threaded connection, a slot fixing method, or a soft rubber stopper fixing method. In specific implementation, such as the soft rubber stopper fixing method, a soft rubber stopper can be fixed inside the bottle body fixing part 11. The soft rubber stopper has an opening in the middle, and the diameter of the opening is slightly smaller than the size of the nozzle 2. Due to the elastic deformation capability of the soft rubber stopper, the nozzle 2 can be pulled out from the opening, and a replacement nozzle 2 can be inserted into the opening to replace the nozzle 2.

[0061] It should be noted that, since the nozzle 2's actuating end 22 needs to be pushed along the push rod 6 toward the output valve 81 of the foaming agent bottle 8 during the use of the foaming gun, when the nozzle 2 is fixed relative to the bottle body fixing part 11, the nozzle 2 should not be rigidly fixed relative to the bottle body fixing part 11 in the direction from the actuating end 22 toward the output valve 81. It can be fixed with a soft elastic structure or only fixed in other directions.

[0062] By replacing nozzle 2, it is not necessary to clean nozzle 2 and plastic tube 9 with cleaning fluid after each use. Simply replace nozzle 2 with a new nozzle 2 and replace plastic tube 9, and it can be used again. The process is convenient.

[0063] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A portable foam gun, for mounting on a bottled foaming agent and outputting foam, characterized in that, Includes: housing, nozzle, trigger, booster, pressure rod, thrust rod, and spring; The housing is divided into a bottle fixing part and a handle part. The nozzle is provided inside the bottle fixing part. The bottle fixing part can be fixedly connected to the foaming agent bottle, and at the same time, the output valve of the foaming agent bottle is tightly connected to the foaming input end of the nozzle. The trigger is fixed to one side of the handle portion, and one end of the trigger is a movable end. The movable end can achieve displacement within the elastic range under the triggering of external force. The booster is provided inside the handle portion. The booster has an L-shaped cavity inside, and through holes are provided at both ends of the L-shaped cavity. The pressure rod and the thrust rod are respectively arranged perpendicularly to each other in the L-shaped cavity and contact each other at the right angle of the L-shaped cavity. The contact surfaces of the pressure rod and the thrust rod are set as matching inclined surfaces. The end of the pressure rod away from the contact surface passes through the first through hole of the L-shaped cavity and extends into the elastic range of the trigger movable end; the end of the push rod away from the contact surface passes through the second through hole of the L-shaped cavity; and the spring is engaged between the push rod and the second through hole. When the trigger is displaced, the pressure rod can drive the push rod to move through the relative sliding of the contact surfaces to compress the spring and push out the second through hole. The actuating end of the nozzle opposite to the foaming input end contacts the thrust rod passing through the second through hole. A foaming output end is provided on the side of the nozzle, and the foaming output end is connected to the foaming input end. The thrust rod that pushes out of the second through hole can push the nozzle through the actuating end to apply pressure to the output valve, so that the foaming agent in the foaming agent bottle is output through the foaming output end.

2. The portable foam gun according to claim 1, characterized in that, It also includes a plastic tube, which is connected to the foaming output end.

3. The portable foam gun according to claim 1 or 2, characterized in that, The bottle fixing part is fixedly connected to the foaming agent bottle by a threaded connection.

4. The portable foam gun according to claim 3, characterized in that, The pressure rod is divided into two parts: a first pressure rod body and a second pressure push rod. The shape and size of the first pressure rod body are adapted to the shape and size of the corresponding position of the L-shaped cavity. The second pressure push rod passes through the first through hole and contacts the movable end of the trigger. The thrust rod is divided into two parts: a first thrust rod body and a second thrust push rod. The shape and size of the first thrust rod body are adapted to the shape and size of the corresponding position of the L-shaped cavity. The second thrust push rod passes through the second through hole and contacts the pushing end of the nozzle. The cross-sectional size of the second thrust push rod is smaller than the cross-sectional size of the first thrust rod body and forms an outer end face at the junction. The spring is engaged between the outer end face and the inner end face of the second through hole.

5. The portable foam gun according to claim 4, characterized in that, The booster is formed by assembling an upper shell and a lower shell to form the L-shaped cavity, and the upper shell and the lower shell are fixed together by a snap fastener.

6. The portable foam gun according to claim 5, characterized in that, The inclined plane angle between the pressure rod and the thrust rod is 30° to 60°.

7. The portable foam gun according to claim 6, characterized in that, The inclined plane between the pressure rod and the thrust rod has an inclination angle of 45°.

8. The portable foam gun according to claim 1 or 4, characterized in that, The spring is a compression spring. When the trigger is not triggered, the spring is in a naturally extended state. When the trigger is triggered, the spring can be compressed by the push rod. When the trigger is deactivated, the spring pushes the push rod back into the second through hole and drives the pressure rod out of the first through hole. At the same time, the trigger returns to its original state.

9. The portable foam gun according to claim 1 or 4, characterized in that, The nozzle is fixed to the fixed part of the bottle body in a detachable manner.

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