A foaming gun

Abstract

The application provides a foaming gun, which comprises a fixed part, wherein the front end of the fixed part is provided with a loose-tight structure, the loose-tight structure comprises a connecting shaft and an operating member, one end of the connecting shaft is connected with one half of the fixed part, the other end of the connecting shaft is connected with the operating member after penetrating through the other half of the fixed part, the operating member is used for pushing one half of the fixed part and the other half of the fixed part to be close to each other at the front end so as to lock the fixed part, a first guide part is arranged between the other half of the fixed part and the operating member and is used for limiting the rotation of the operating member around the connecting shaft, the first guide part is used for guiding the operating member to be close to / distance from the periphery of the fixed part, the close-to operation is used for the locked state of the fixed part, and the distance-from operation is used for the unlocked state of the fixed part, so that the tank body is conveniently locked / unlocked.

Description

Technical Field

[0001] This invention relates to the field of auxiliary tools for using foaming agents, specifically a foaming gun. Background Technology

[0002] Foaming agents are used in both production and daily life, and are a common type of material. For ease of use, foaming agents are packaged in cans and applied via foaming guns or disposable tubing.

[0003] The foaming agents mentioned, such as polyurethane foam, are generally divided into two types: tube type and gun type. Tube type usually comes with a disposable tube or requires connection to a foaming gun (or foam glue gun) for use. Polyurethane foam is a special polyurethane product that contains polyurethane prepolymer, foaming agent, catalyst, and other components in a pressurized aerosol can. It is commonly used for sealing gaps, bonding, leak plugging, thermal insulation, sound insulation, and waterproofing in doors and windows. The aforementioned polyurethane foam is a typical foaming agent and is widely used.

[0004] Because the use of this product requires opening the valve of the can, and the can is pressurized, a foam gun or a disposable hose is needed. However, both have their drawbacks. Foam guns are expensive, prone to clogging, and require a connection point (usually a threaded part) on the can to connect to the foam gun, further increasing the can's cost. While disposable hoses are much cheaper than foam guns, they require holding the can and using your fingers to press the thin handle on the hose to open the valve, which is inconvenient and strenuous. Furthermore, the pressing direction is difficult to control, leading to operational failures and severely limiting user expansion and ensuring product quality. Disposable hoses are unsuitable for users with little strength or small hands. The need to control the hose also greatly restricts adjustments to the nozzle direction and distance, making it difficult to operate unless the user is experienced and strong, resulting in lower quality of use.

[0005] To this end, the applicant conducted in-depth research and first applied for a Chinese utility patent for a foam glue gun, patent number CN201922077735.5. Although it has made significant improvements compared to the prior art, namely, "compared to the original foam gun, the foam glue gun does not require a barrel or other related structures, has no clogging problem, and reduces costs considerably. Compared to disposable glue tubes, it is more convenient for users to use, and overcomes the problem that users need to hold the can and use their fingers to press the thin handle on the disposable glue tube," the foam glue gun has not yet solved the problem of how to easily lock / unlock the can, and is reliable and effective. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the defects of the prior art and propose a foam gun that is convenient for locking / unlocking the can, and is reliable and effective.

[0007] Compared to existing technologies, this invention proposes a foaming gun, including a fixing part for detachably mounting and fixing a foaming agent canister. The fixing part has a handle on its rear side and an operating handle on its lower side. After the canister is mounted and fixed to the fixing part, the canister's valve is located above the operating handle, and the canister's spray nozzle outlet is located below the operating handle. The operating handle is used to open the valve. The front end of the fixing part has a tightening structure, including a connecting shaft and an operating component. One end of the connecting shaft is connected to one half of the fixing part, and the other end passes through the other half of the fixing part and connects to the operating component. The operating component is used to push one half of the fixing part and the other half of the fixing part together at the front end to lock the fixing part. A first guide part is provided between the other half of the fixing part and the operating component to restrict the rotation of the operating component around the connecting shaft. This first guide part guides the operating component to move closer to / away from the outer periphery of the fixing part; moving closer indicates a locked state, and moving away indicates an unlocked state.

[0008] As an improvement, the tensioning structure includes an elastic element that can open the fixing part. This elastic element provides an anti-loosening elastic force to prevent the tensioning structure from loosening and provides an elastic force that automatically opens the fixing part when it is loosened.

[0009] As an improvement, the tensioning structure includes a connecting shaft, an operating member, and a compression spring. The compression spring is an elastic member and is sleeved with the connecting shaft. One end of the connecting shaft is connected to one half of the fixing part, and one end of the compression spring abuts against that half. The other end of the connecting shaft passes through the other half of the fixing part and is connected to the operating member, and the other end of the compression spring abuts against that other half.

[0010] As an improvement, the elastic element allows the first guide portion to elastically abut against the operating element.

[0011] As an improvement, the rotating circumferential surface of the operating member cooperates with the guide concave surface of the first guide part to achieve the guiding purpose.

[0012] As an improvement, a circumferential groove is provided on the inner circumference of the fixing part, which is used to limit the tank body at least axially.

[0013] As an improvement, the fixing part adopts an integral structure or a structure composed of two parts spliced ​​together, and the fixing part is provided with a second guide part to guide the swing of the operating handle.

[0014] As an improvement, the operating handle is provided with a mating port that mates with the handle of the tank body. There is one mating port at the front and one at the rear. The mating port is used to avoid the front and rear ends of the handle, and at the same time, it reduces the left and right swaying of the handle when it is pressed by the operating handle.

[0015] As an improvement, the operating handle is also provided with a clearance hole at the front end of the handle for avoiding the tank body.

[0016] As an improvement, the fixing part adopts a clamp structure.

[0017] Compared with existing technologies, this invention, employing the above structure, has the following advantages: it prevents the operating component from rotating arbitrarily around the connecting shaft, providing better guidance. This improvement is crucial in practical applications because, during large-scale construction, workers are extremely busy. When a new tank is installed, they may not pay much attention to the locking direction of the operating component; in their minds, simply locking it is sufficient. With the aforementioned convenient design, the opening and closing directions of the operating component are defined. After closing, the operating component is well-limited to the outer periphery of the fixed part, making it less likely for the operating component to get caught on other objects or be accidentally moved. In summary, it facilitates locking / unlocking the tank and is reliable and effective. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the foam gun of the present invention.

[0019] Figure 2 This is a three-dimensional schematic diagram of the foam gun of the present invention with an adjustment block installed.

[0020] Figure 3 This is one of the three-dimensional illustrations of a foam gun after half of the fixing part has been removed.

[0021] Figure 4 This is the second 3D illustration of a foam gun after half of the fixing part has been removed.

[0022] Figure 5 for Figure 4 A 3D schematic diagram after removing the operating components.

[0023] Figure 6 This is a three-dimensional diagram of the control handle.

[0024] Figure 7 This is one of the three-dimensional reference diagrams of the foam gun of the present invention in use.

[0025] Figure 8 This is the second three-dimensional reference diagram of the foam gun of the present invention in use.

[0026] Figure 9 This is a schematic diagram of the first tank.

[0027] Explanation of reference numerals in the attached drawings: 1-First tank body, 2-Second tank body, 3-Handle, 4-Hinge, 5-Disposable hose, 6-Front part, 7-Middle part, 8-Rear part, 9-Adjusting screw, 10-Adjusting block, 11-Clamp, 12-Elastic element, 13-Connecting shaft, 14-Operating element, 15-Circumferential groove, 16-First guide part, 17-Second guide part, 18-Anti-loosening nut, 19-Threaded connection part, 20-Guide groove, 21-Guide post, 22-Matching port, 23-Guide surface, 24-Through hole, 25-Circumferential protrusion, 26-Handle, 27-Front end protrusion, 28-Allowing hole. Detailed Implementation

[0028] The following description is intended to disclose the present invention and enable those skilled in the art to implement it. The embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0029] The present invention will now be described in further detail:

[0030] like Figure 1 As shown, a foam gun is disclosed, including a fixing part for detachably installing and fixing a foaming agent canister. A handle 3 is provided on the rear side of the fixing part, and an operating handle is provided on the lower side of the fixing part. The operating handle is hinged to the front part 6 of the fixing part. After the canister is installed and fixed in the fixing part, the valve of the canister is located on the upper side of the operating handle, and the outlet of the canister's spray tube is located on the lower side of the operating handle. The operating handle can swing upward via the hinge to open the valve.

[0031] In this example, the fixing part uses a clamp 11, and the front end of the clamp 11 has a tightening structure. To achieve better labor-saving effect, the hinge point where the operating handle is hinged to the front part 6 of the fixing part can be as far forward as possible, for example, at the front end of the fixing part. The hinge point is formed as a hinge part 4. To accommodate the tightening structure, the tightening structure and the hinge part are arranged vertically, which can be combined... Figure 1 , 3 understand.

[0032] like Figure 6As shown in the diagram and referring to other accompanying drawings, the operating handle includes a front part 6, a middle part 7, and a rear part 8. The front part 6 is tilted upwards, and its front end is hinged to the front part 6 of the fixed part. The middle part 7 has a valve support, and the rear part 8 serves as the user's grip. In this example, the middle part 7 and the rear part 8 are roughly L-shaped, with the middle part 7 being roughly horizontal and the rear part 8 being roughly vertical. Therefore, combined with the technical feature of the front end of the front part 6 being hinged to the front part 6 of the fixed part, it not only achieves effortless operation but also has an additional advantage: with a small stroke of the grip, sufficient upward displacement of the middle part 7 can be achieved, which is also sufficient upward displacement of the valve support. This displacement is used to open the valve, making operation easier and eliminating the need for a large stroke of the grip, which is very beneficial for practical use. In addition, since the middle part 7 is set in a roughly horizontal position, the upward displacement of the middle part 7 results in a smaller upward displacement deflection of the valve support. In other words, this structural design allows the valve support to move mainly along the axial direction of the tank, thereby opening the valve more effectively. This is consistent with the characteristic that valve opening mainly involves axial movement.

[0033] The middle part 7 is set in a roughly horizontal direction, and the rear part 8 is set in a roughly vertical direction. It is not necessary to be absolutely horizontal and vertical, as long as the above-mentioned stroke and displacement relationship can be achieved.

[0034] The middle section 7 is equipped with an adjustment structure for the support height of the valve support. In this example, two adjustment structures are disclosed. One type utilizes the adjusting screw 9, such as... Figure 3 As shown, the application scenarios are as follows: Figure 7 As shown, another type is adjustment block 10, such as Figure 2 As shown, the application scenarios are as follows: Figure 8 As shown. Of course, other structures are also possible, as long as they can achieve the adjustment of the support height of the valve support. The adjustable structure allows the foam gun of this invention to be more compatible with existing tanks on the market, facilitating its immediate use and large-scale promotion and application.

[0035] like Figure 3 , 6 As shown, the fixing part adopts a structure composed of two spliced ​​parts. The fixing part is provided with a second guide part 17 to guide the swing of the operating handle. This facilitates manufacturing and, on the other hand, the second guide part 17 can guide the swing of the operating handle, making it more stable and reliable in use and providing a better feel. In this example, guide posts 21 are provided on both sides of the middle of the operating handle, and correspondingly, the fixing part has two second guide parts 17, each of which has an arc-shaped guide groove 20. Of course, the fixing part can also adopt a one-piece structure, but from an engineering perspective, the spliced ​​structure is easier to implement and has a lower cost.

[0036] In this example, the tightening structure includes an elastic element 12 that can open the clamp 11. This elastic element 12 provides an anti-loosening elastic force to prevent the tightening structure from collapsing, and provides an elastic force to automatically open the clamp 11 when it is loosened. This design has at least the following advantages: firstly, it prevents the tightening structure from collapsing; secondly, it helps prevent loosening when the clamp 11 is locked; and thirdly, it allows the clamp 11 to open automatically when unlocked, greatly facilitating tank replacement. This is a significant advantage in practical applications because, in actual use, especially in large-scale construction, tank replacement is frequently required, and the aforementioned convenience design makes replacement very easy and convenient. Of course, the tightening structure can also be used without the elastic element 12, but such a structure does not have the advantages described above.

[0037] like Figure 1 , 3 As shown in Figures 4 and 5, in this example, the tightening structure with elastic element 12 includes a connecting shaft 13, an operating element 14, and a compression spring. The compression spring is the elastic element described above. The compression spring is sleeved on the connecting shaft 13. One end of the connecting shaft 13 is connected to one half of the clamp 11, and one end of the compression spring abuts against this half. The other end of the connecting shaft 13 passes through the other half of the clamp 11 and is connected to the operating element 14. The other end of the compression spring abuts against this other half. The operating element 14 is used to push one half of the clamp 11 and the other half of the clamp 11 together at the front end to lock the clamp 11. In this example, the connecting shaft 13 uses a fisheye bolt. One end of the fisheye bolt is connected to one half of the clamp 11 via a lock nut 18. The other end of the fisheye bolt is located outside the other half of the clamp 11, and a pivot is provided at the fisheye. This pivot is rotatably connected to the operating element 14.

[0038] like Figure 4 , 5 As shown, in this example, a first guide portion 16 is provided between the other half of the clamp 11 and the operating member 14. The first guide portion 16 is used to guide the operating member 14 to move closer to / away from the outer periphery of the clamp 11. Moving closer means the clamp 11 is in a locked state, and moving away means the clamp 11 is in an unlocked state. This design can prevent the operating member 14 from rotating at will and has better guidance. This improvement has an important role in practical applications because, in large-scale construction, workers are very busy. When they replace the tank with a new one, they may not pay much attention to the locking direction of the operating member 14. In the workers' minds, as long as it is locked, it is fine. With the aforementioned convenient design, the opening and closing direction of the operating member 14 is defined. After the operating member 14 is closed, it is well limited to the outer periphery of the clamp 11, making it less likely for the operating member 14 to get caught on other things or to be accidentally moved. In this example, the specific structure used is that the rotating circumferential surface of the operating member 14 is an eccentric surface, which cooperates with the guide surface 23 of the first guide part 16 to achieve the guiding purpose.

[0039] The use of the elastic element 12 enables the operating element 14 and the first guide part 16 to always be in contact under normal use. That is, the elastic element 12 makes the first guide part 16 and the operating element 14 elastically abut against each other. In other words, the eccentric surface and the guide surface 23 (i.e. guide concave surface) of the first guide part 16 are always in contact, so that the operating element 14 cannot rotate around the connecting shaft 13. When it is necessary to adjust the distance between the front ends of one half of the clamp 11 and the other half of the clamp 11 by rotating the operating member 14, the distance between the front ends of the clamp 11 and the other half of the clamp 11 can be manually compressed, thereby separating the operating member 14 from the first guide part 16. In this way, the operating member 14 can rotate without being restricted by the first guide part 16. By rotating the operating member 14, the relative position of the anti-loosening nut 18 and the connecting shaft 13 is changed, thereby adjusting the pre-distance between the front ends of the clamp 11 and the other half of the clamp 11, that is, the distance before the clamp 11 is locked. The aforementioned adjustment can adjust the locking force during locking or adjust the distance to suit tanks of different diameters. The operating member 14 can also be rotated in other ways, such as forcibly rotating the operating member 14 to exceed the engagement between the operating member 14 and the first guide part 16.

[0040] like Figure 3 As shown, the clamp 11 has a circumferential groove 15 on its inner circumference. This circumferential groove 15 is used to at least axially limit the tank body. With this design, on the one hand, the installation of the tank body is very convenient; simply insert it into the circumferential groove 15 and then lock it. On the other hand, the circumferential groove 15 at least axially limits the tank body, thus ensuring the axial position of the tank body is stable after installation. In fact, the circumferential groove 15 also has a certain circumferential limiting effect on the tank body because it also circumferentially grips the tank body when locking. The aforementioned design utilizes the existing tank body's circumferential protrusion 25 at the head, and cleverly designs it to achieve the design purpose. The structure is simple and compact, the performance is stable and reliable, and it greatly facilitates the user's use.

[0041] like Figure 7 , 8 The diagram shown illustrates the usage reference states for the two types of tanks. Figure 9 The image shows a first canister 1, to which a disposable rubber tube 5 is inserted. The disposable rubber tube 5 has a slender handle 26. This is the existing solution for disposable rubber tube 5 used when a foam gun is not used, requiring the user to press or pull the handle 26 with their fingers. The foam gun of this invention goes a step further, namely… Figure 9 The first tank 1 is installed and fixed to the foaming gun of the present invention to obtain the following: Figure 7 In the state shown, when the operating handle is turned, the valve support will press the handle 26 to move approximately along the axial direction of the first tank 1, thereby opening the valve of the first tank 1 and spraying the foaming agent from the disposable tube 5.

[0042] To allow the disposable tubing 5 to protrude, the operating handle has a through hole 24 in its middle section 7. To minimize lateral movement of the handle 26 when pressed, the operating handle also has a mating opening 22 in its middle section 7 that mates with the handle 26. Figure 6 As shown, there is one fitting port 22 at the front and one at the back. The fitting port 22 also serves to avoid the handle 26, so that the handle 26 can be exposed to the rear. The purpose of this avoidance design is also to be compatible with disposable tubing 5 on the market, thereby improving the compatibility of the present invention.

[0043] like Figure 8 The diagram shown is a reference image of the usage state with the second canister 2 installed. Compared to the first canister 1, the second canister 2 has an additional threaded connection part 19 for connecting to an existing foam gun. In addition, an adjusting block 10 is added so that the valve support part can press the handle 26 and ultimately open the valve. Therefore, it can be seen that the foam gun of the present invention is also applicable to canisters with threaded connection parts 19.

[0044] On the market, some handles 26 have a relatively long front end. The disposable tubing 5 used in the first can body 1 has this problem, which results in a protruding front end 27. In order to avoid the protruding front end 27, the operating handle is also provided with a clearance hole 28 at the front part 6.

[0045] When understanding this invention, the above structure may be referred to in other appendices if necessary. Figure 1 And that is understood, so I will not elaborate further here.

[0046] The above description is merely an illustrative embodiment of the present invention. Therefore, all equivalent changes or modifications made to the structure, features, and principles described in the scope of protection of the present invention are included within the scope of protection of the present invention.

Claims

1. A foaming gun, comprising a fixing part for detachably mounting and fixing a can of foaming agent, wherein a valve of the can is connected to a spray hose, and the spray hose is provided with a handle, characterized in that, The fixed part is provided with a handle on the rear side and an operating handle on the lower side of the fixed part. The operating handle includes a front part, a middle part and a rear part. The front part is raised and the front end of the operating handle is hinged to the front part of the fixed part. The middle part is the support part of the handle and the rear part is the user's grip part. The middle part and the rear part are roughly L-shaped. The middle part is roughly horizontal and the rear part is roughly vertical. The rear part and the handle form an inverted V-shaped grip structure. Furthermore, a through hole is provided in the middle, and the through hole is connected vertically to the fixing part. The middle part is also provided with a mating port that cooperates with the handle to form left and right limits. When the operating handle is turned, the support part will press the handle to move roughly along the axial direction of the tank, thereby opening the valve of the tank and spraying the foaming agent out from the spray tube. The front end of the fixing part is provided with a tensioning structure, which includes a connecting shaft and an operating member. One end of the connecting shaft is connected to one half of the fixing part, and the other end of the connecting shaft passes through the other half of the fixing part and is connected to the operating member. The operating member is used to push one half of the fixing part and the other half of the fixing part to close together at the front end to lock the fixing part. A first guide part is provided between the other half of the fixing part and the operating member to restrict the rotation of the operating member around the connecting shaft. The first guide part is used to guide the operating member to move closer to / away from the outer periphery of the fixing part. When it moves closer, the fixing part is in a locked state, and when it moves away, the fixing part is in an unlocked state.

2. The foam gun according to claim 1, characterized in that, The tensioning structure includes an elastic element that can open the fixing part. This elastic element provides an anti-loosening elastic force to prevent the tensioning structure from loosening and provides an elastic force that automatically opens the fixing part when it is loosened.

3. The foam gun according to claim 2, characterized in that, The tensioning structure includes a connecting shaft, an operating component, and a compression spring. The compression spring acts as an elastic element and is sleeved with the connecting shaft. One end of the connecting shaft is connected to one half of the fixed part, and one end of the compression spring abuts against that half. The other end of the connecting shaft passes through the other half of the fixed part and is connected to the operating component, and the other end of the compression spring abuts against that other half.

4. The foam gun according to claim 2, characterized in that, The elastic element allows the first guide part to elastically abut against the operating part.

5. The foam gun according to claim 1 or 4, characterized in that, The rotating circumferential surface of the operating component cooperates with the guide concave surface of the first guide part to achieve the guiding purpose.

6. The foam gun according to claim 1, characterized in that, The inner circumference of the fixing part is provided with a circumferential groove, which is used to limit the tank body at least axially.

7. The foam gun according to claim 1, characterized in that, The fixing part adopts an integral structure or a structure composed of two parts spliced ​​together. The fixing part is provided with a second guide part to guide the swing of the operating handle.

8. The foam gun according to claim 1, characterized in that, The operating handle is also provided with a clearance hole at the front end of the handle for avoiding the tank body.

9. The foaming gun according to claim 1, 2, 3, 6, or 7, characterized in that, The fixing part adopts a clamp structure.

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