Inflator

Abstract

The utility model discloses an inflator which comprises an air pipe, a connector and an outer cover. The air pipe is a plastic pipe body, the air pipe is provided with two opposite ends and forms an internal space, the connector is a metal structural body and is arranged at one end of the air pipe, and the outer cover is a plastic cover body and is combined with one end of the air pipe in a welding mode so that the connector can be limited at one end of the air pipe. According to the inflator, the problem of gas leakage caused by the fact that the welding position is prone to cracking can be solved, and the inflator is not prone to gas leakage and good in quality stability.

Description

Technical Field

[0001] The utility model relates to a gas filling device, in particular to a pump adapter. Background Art

[0002] A pump is a common device that drives gas into a space to be inflated through manual operation and can be used to inflate tires, various balls, etc. As Figure 8 and Figure 9 shown, the existing pump 90 generally includes an air duct 91 and an adapter 92. An internal space is formed inside the air duct 91 for gas flow. The adapter 92 is provided at one end of the air duct 91 to install an inflation needle or a hose, so as to be able to inflate.

[0003] The air duct 91 of the existing pump 90 is mostly made of plastic material, and the adapter 92 is made of metal material and fixed to the air duct 91 by a welding method. However, the welding method of dissimilar materials results in a lower structural strength at the welding joint of the air duct 91 and the adapter 92, which is prone to cracking, leading to gas leakage or other problems, resulting in unstable quality of the existing pump. Summary of the Utility Model

[0004] In order to solve the problem that the existing pump fixes the metal adapter to the plastic air duct by a welding method, resulting in unstable quality of the pump, the purpose of the utility model is to provide a pump that can improve the structural strength, avoid cracking problems, and thus improve the quality stability.

[0005] The pump proposed by the utility model to solve the technical problem includes:

[0006] An air duct, which is a pipe body made of plastic material. The air duct has two opposite ends and is hollow to form an internal space;

[0007] An adapter, which is a structural body made of metal material and is provided at one end of the air duct;

[0008] An outer cover, which is a cover body made of plastic material. The outer cover is welded and combined with one end of the air duct and limits the adapter at one end of the air duct; and

[0009] An inflation mechanism, which is provided in the internal space of the air duct and can be operated to make gas flow out of the air duct through the adapter from the internal space.

[0010] The enhanced efficacy achievable by the technical means of the present utility model lies in that: compared with the existing air pump which directly welds the metal connector to the plastic air duct, the present utility model welds an outer cover of the same material as the air duct separately, and positions the connector at one end of the air duct in a limited way, which can avoid the problem that the structural strength at the welding joint is insufficient and it is easy to crack and cause gas leakage when welding different materials. Therefore, the present utility model can provide an air pump with sufficient structural strength, less prone to gas leakage, and good quality stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 FIG. is a three-dimensional external view of the first preferred embodiment of the present utility model.

[0012] Figure 2 FIG. is a side sectional view of the first preferred embodiment of the present utility model.

[0013] Figure 3 FIG. is an operation schematic diagram of the combination of the outer cover and the air duct of the first preferred embodiment of the present utility model.

[0014] Figure 4 AND Figure 5 FIG. is a side sectional view of the inflation process of the first preferred embodiment of the present utility model.

[0015] Figure 6 FIG. is an operation schematic diagram of the combination of the outer cover and the air duct of the second preferred embodiment of the present utility model.

[0016] Figure 7 FIG. is a partially enlarged side sectional view of the second preferred embodiment of the present utility model.

[0017] Figure 8 FIG. is a three-dimensional external view of the existing air pump.

[0018] Figure 9 FIG. is a partially enlarged side sectional view of the existing air pump. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to understand in detail the technical features and practical effects of the present utility model and to implement it according to the new content, the following further describes in detail with the preferred embodiments shown in the drawings:

[0020] As Figure 1 AND Figure 2 shown, the first preferred embodiment of the air pump of the present utility model includes an air duct 10, a connector 20, an outer cover 30 and an inflation mechanism 40. The connector 20 is disposed inside the air duct 10, the outer cover 30 is combined with the air duct 10 to limit the connector 20, and the inflation mechanism 40 is disposed inside the air duct 10.

[0021] Among them, the air duct 10 is a pipe body made of plastic material, such as Figure 1 and Figure 2 shown, the air duct 10 has two opposite ends, which are respectively defined as an operation end and an output end, and the air duct 10 is hollow to form an internal space 11. The joint 20 is a structure made of metal material, and it adopts a conventional inflatable joint structure, such as Figure 1 and Figure 2 shown, the joint 20 is arranged at the output end of the air duct 10, and the joint 20 axially penetrates through a through hole 200. Among them, the joint 20 is provided with internal threads on the hole wall of the through hole 200 so as to be tightly screwed with related components for inflating, such as tire nozzles and inflating needles, and has an airtight effect.

[0022] The outer cover 30 is a cover body made of plastic material. Preferably, the outer cover 30 and the air duct 10 can adopt the same material. Such as Figure 1 and Figure 2 shown, the outer cover 30 is combined with the output end of the air duct 10, so as to limit the joint 20 at the output end of the air duct 10. Thus, it can prevent the joint 20 from falling off the output end of the air duct 10. Among them, the outer cover 30 and the air duct 10 are integrally combined by welding. The setting methods of the air duct 10, the joint 20 and the outer cover 30 will be described in detail in the subsequent production process of the air pump.

[0023] Such as Figure 2 shown, the inflating mechanism 40 is arranged in the internal space 11 of the air duct 10. Among them, a part of the inflating mechanism 40 protrudes from the operation end of the air duct 10 and can be operated by the user, so as to change the pressure of the internal space 11 of the air duct 10, so that the gas flows out of the air duct 10 through the joint 20 from the internal space 11, and enters objects to be inflated, such as tires and balls, through the aforementioned related components for inflating, such as tire nozzles and inflating needles.

[0024] The production process of the air pump of the present utility model is generally as follows: After the air duct 10, the joint 20, the outer cover 30, the inflating mechanism 40 and other components and their parts are respectively manufactured by molding and processing raw materials, assembly is required to complete the air pump. During the assembly process, first, the inflating mechanism 40 and related parts are arranged in the internal space 11 from the operation end of the air duct 10, and then the joint 20 and the outer cover 30 are sequentially arranged at the output end of the air duct 10.

[0025] Such as Figure 3 shown on the left side, first place the joint 20 at the output end of the air duct 10, and then, such as Figure 3As shown in the middle part of [Figure 0], the outer cover 30 is then provided such that the outer cover 30 contacts the air duct 10 and is located outside the joint 20 to complete the preliminary configuration of the joint 20 and the outer cover 30. In a preferred embodiment of the present utility model, the joint 20 is disposed between the outer cover 30 and a gasket at the end of a pre-provided inflation mechanism 40, so that the joint 20 can be limited in position.

[0026] Furthermore, as Figure 3 shown on the left side of [Figure 0], in a preferred embodiment of the present utility model, the air duct 10 is further provided with an inner flange 14 which protrudes from the inner wall of the air duct 10 and is close to the output end of the air duct 10. If the inflation mechanism 40 is provided and the joint 20 and the outer cover 30 are first provided at the output end of the air duct 10, then the joint 20 can be disposed between the outer cover 30 and the inner flange 14, and the same limiting effect can be achieved. In other embodiments, only one of the above methods may be adopted, or other structures or components inside the air duct 10 may be used to cooperate with the outer cover 30 to limit the position of the joint 20.

[0027] After the configuration is completed, welding processing is then carried out to weld and combine the outer cover 30 for limiting position with the output end of the air duct 10, so that the outer cover 30 and the air duct 10 are Figure 3 firmly combined into one body as shown on the right side of [Figure 0], and thus the assembly of the air pump is completed. Specifically, the outer cover 30 and the air duct 10 can be combined into one body by ultrasonic welding. Ultrasonic welding has high efficiency, low cost, good finished product quality, high strength, consistent and beautiful appearance, and can also truly achieve an airtight effect. Alternatively, the outer cover 30 and the air duct 10 can also adopt other conventional plastic welding techniques.

[0028] Compared with the existing air pump 90 in which a joint 92 made of a metal material is directly welded and combined with an air duct 91 made of a plastic material, in the present utility model, by additionally welding the outer cover 30 made of the same material as the air duct 10 and limiting the position of the joint 20 at one end of the air duct 10, the problem that the structural strength at the welding joint is insufficient and it is easy to crack and cause gas leakage when welding different materials can be avoided. Thus, the present utility model can provide an air pump with sufficient structural strength, less likely to have gas leakage, and good quality stability.

[0029] Furthermore, as Figure 3As shown, in the first preferred embodiment of the present utility model, the joint 20 includes a first column portion 21 and a second column portion 22. The first column portion 21 and the second column portion 22 are arranged along the axial direction of the joint 20 and are connected. The first column portion 21 and the second column portion 22 have an annular structure surrounding the through hole 200. Among them, the outer diameter of the first column portion 21 is greater than the outer diameter of the second column portion 22, so that a step 23 is formed on the outer periphery of the joint 20. The outer cover 30 is provided with an opening 31. The diameter of the opening 31 is smaller than the outer diameter of the first column portion 21 and greater than the outer diameter of the second column portion 22. The outer cover 30 is arranged on the step 23, so that the second column portion 22 is inserted into the opening 31 of the outer cover 30, and the first column portion 21 is blocked by the outer cover 30.

[0030] Due to the different outer diameters of the first column portion 21 and the second column portion 22 of the joint 20, and the corresponding dimension design of the outer cover 30, the second column portion 22 is inserted into the opening 31 of the outer cover 30. When inflating related components such as a ball needle are to be installed on the joint 20, they can be smoothly installed through the opening 31 of the outer cover 30 without being blocked, and the design of the outer cover 30 will not increase the operation difficulty of inflation.

[0031] Furthermore, as Figure 3 shown, an air duct opening 12 and an annular wall 13 surrounding the air duct opening 12 are further formed at the output end of the air duct 10. The first column portion 21 of the joint 20 is located inside the air duct 10 and is surrounded by the annular wall 13, that is, the diameter of the air duct opening 12 is greater than the outer diameter of the first column portion 21. The second column portion 22 of the joint 20 protrudes from the air duct opening 12 and is inserted into the opening 31 of the outer cover 30 as described above. Thus, as Figure 3 shown on the left, during assembly, the joint 20 can be first placed into the air duct 10 through the air duct opening 12, so that the first column portion 21 is first surrounded by the annular wall 13 and can be stably placed at the output end of the air duct 10, and then the outer cover 30 is combined, so as to limit the first column portion 21 inside the air duct 10. The operation is simple and convenient, and the production efficiency can be improved.

[0032] Preferably, as Figure 3 shown in the middle and on the right, the outer cover 30 is sleeved on the annular wall 13 of the air duct 10 and is welded and combined with the annular wall 13. Compared with using a relatively small outer cover and only combining it at the edge of the air duct opening 12, in the preferred embodiment of the present utility model, the outer cover 30 is extended in design, so that the outer cover 30 covers the annular wall 13 and is welded and combined with the annular wall 13, which can improve the structural strength and stability, and enable the joint 20 to be more firmly arranged at the output end of the air duct 10. In addition, the thickness of the annular wall 13 of the air duct 10 can also be designed to be thinner.

[0033] In addition, as Figure 2 shown,Figure 4 and Figure 5 As shown in Figure 5 , the air pump adopts a two-way inflation structure. Among them, the inflation mechanism 40 includes an operation component 41 and an inner tube 42. The operation component 41 includes an operation handle 411, an outer tube 412 and a partition seat 413. The operation handle 411 protrudes from the operation end of the air duct 10 outside the air duct 10 for the user to operate. The outer tube 412 is connected to the operation handle 411 and is located in the internal space 11 of the air duct 10. The partition seat 413 is connected to one end of the outer tube 412 away from the operation handle 411.

[0034] Among them, as Figure 4 and Figure 5 shown, the partition seat 413 divides the internal space 11 into a first chamber 111 and a second chamber 112. The first chamber 111 is defined between the partition seat 413 and the output end of the air duct 10. The second chamber 112 is defined between the partition seat 413 and the operation end of the air duct 10. The inner tube 42 is fixed at a position of the air duct 10 close to the output end and extends toward the operation end and is inserted into the outer tube 412. Among them, the joint 20 is limited between the gasket at the end of the inner tube 42 and the outer cover 30.

[0035] Furthermore, as Figure 4 and Figure 5 shown, the operation component 41 further includes two O-rings 416. The partition seat 413 is hollow. The inside of the partition seat 413 is connected to the inside of the outer tube 412. And there are two gaps formed between the partition seat 413 and the inner wall of the air duct 10. The first chamber 111 and the second chamber 112 are respectively connected to the inside of the partition seat 413 through one of the corresponding gaps. The two O-rings 416 surround the partition seat 413 and abut against the inner wall of the air duct 10. Specifically, the two O-rings 416 are respectively accommodated in a ring groove 414 on the partition seat 413. The inside of the ring groove 414 is connected to the inside of the outer tube 412 through two spaced communication ports 415. When the outer tube 412 and the partition seat 413 move, the two O-rings 416 will be driven to block one of the gaps, achieving the above-mentioned two-way inflation effect.

[0036] Specifically, as Figure 4As shown, when the outer tube 412 and the partition seat 413 move towards the output end of the air duct 10, the two O-rings 416 first abut against the inner wall of the air duct 10, then abut against the side wall of the annular groove 414, and are then driven by the partition seat 413 to move, so that the O-rings 416 block the gap communicating the second chamber 112 and the interior of the partition seat 413. At this time, since the first chamber 111 shrinks, the gas in the first chamber 111 is driven to enter the interior of the partition seat 413 through the corresponding gap, and then sequentially enters the outer tube 412, the inner tube 42, and flows to the joint 20.

[0037] And as Figure 5 shown, when the outer tube 412 and the partition seat 413 move towards the operating end of the air duct 10, the O-rings 416 first abut against the side wall of the annular groove 414, and are then driven by the partition seat 413 to move, so that the O-rings 416 block the gap communicating the first chamber 111 and the interior of the partition seat 413. At this time, since the second chamber 112 shrinks, the gas in the second chamber 112 is driven to enter the interior of the partition seat 413 through the corresponding gap, and then sequentially enters the outer tube 412, the inner tube 42, and flows to the joint 20.

[0038] Correspondingly, as Figure 2 , Figure 4 and Figure 5 shown, the air duct 10 further includes several first air inlet holes 101 and several second air inlet holes 102. The several first air inlet holes 101 communicate the first chamber 111 with the outside of the air duct 10, and the several second air inlet holes 102 communicate the second chamber 112 with the outside of the air duct 10. The inflation mechanism 40 is provided with a first baffle 43 and a second baffle 44, which are respectively located at the several first air inlet holes 101 and the several second air inlet holes 102.

[0039] When the partition seat 413 moves towards the output end of the air duct 10, the space of the first chamber 111 shrinks, and the gas will push the first baffle 43 to cover the several first air inlet holes 101, and the gas will push open the second baffle 44 from the outside and enter the second chamber 112 through the several second air inlet holes 102; when the partition seat 413 moves towards the operating end of the air duct 10, the space of the second chamber 112 shrinks, and the gas will push the second baffle 44 to cover the several second air inlet holes 102, and the gas will push open the first baffle 43 from the outside and enter the first chamber 111 through the several first air inlet holes 101. Thus, a two-way inflation effect can be successfully achieved, and the pressure balance can be maintained at the same time.

[0040] In addition, as Figure 4 and Figure 5As shown, in the first preferred embodiment of the present utility model, the operation assembly 41 is further provided with a sealing ring and a spacer baffle 417. As Figure 4 shown, the sealing ring is an O-ring, which is tightly sleeved on the inner tube 42, and the outer periphery of the sealing ring abuts against the inner wall of the partition seat 413, ensuring that gas will not pass through the gap between the partition seat 413 and the inner tube 42. The spacer baffle 417 is combined with the partition seat 413 to limit the sealing ring within the partition seat 413. Thus, the gas can limit the gas to enter and exit only through the gap between the partition seat 413 and the inner wall of the air duct 10, truly achieving the effect of bidirectional inflation.

[0041] As Figure 6 and Figure 7 shown is the second preferred embodiment of the air pump of the present utility model. The difference from the first preferred embodiment of the present utility model is that the output end of the air duct 10 adopts a recessed design to form a recess, and the joint 20 and the outer cover 30 are assembled at positions within the recess of the air duct 10. Specifically, the air duct 10 further forms a receiving groove 15 at the output end, the receiving groove 15 is within the recess, and the interior of the receiving groove 15 communicates with the recess and the internal space 11 of the air duct 10.

[0042] During assembly, first place the joint 20 through the aforementioned recess so that the first column portion 21 is within the internal space 11 and the second column portion 22 is within the receiving groove 15. Then, weld and combine the outer cover 30 to the interior of the receiving groove 15 so that the outer cover 30 surrounds the outer periphery of the second column portion 22 and blocks the first column portion 21 within the air duct 10. Among them, the joint 20 can be blocked between the outer cover 30 and the inflation mechanism 40 as in the first preferred embodiment of the present utility model. Thus, the second preferred embodiment of the present utility model can achieve the limiting effect as in the first preferred embodiment of the present utility model, providing another type of air pump.

[0043] The above are only the preferred embodiments of the present utility model, and do not impose any formal restrictions on the present utility model. Any person with ordinary knowledge in the relevant technical field, without departing from the scope of the technical solution proposed by the present utility model, using the technical content disclosed by the present utility model to make partial changes or modified equivalent embodiments, and without departing from the technical solution content of the present utility model, still fall within the scope of the technical solution of the present utility model.

Claims

1. An air pump, characterized in that: Include: An air duct, which is a tube body made of plastic material, has two opposite ends and is hollow to form an inner space; A joint, which is a structure made of metal material and is provided at one end of the air duct; An outer cover, which is a cover body made of plastic material, the outer cover is welded to one end of the air duct and the joint is limited to one end of the air duct; and An air filling mechanism is arranged in the inner space of the air duct and can be operated to drive the gas to flow from the inner space to the outside of the air duct through the joint.

2. The air pump according to claim 1, characterized in that The joint includes a first column portion and a second column portion connected to each other, the outer diameter of the first column portion is larger than the outer diameter of the second column portion, the outer cover is provided with an opening, the diameter of the opening is smaller than the outer diameter of the first column portion and larger than the outer diameter of the second column portion, the second column portion is inserted into the opening of the outer cover, and the first column portion is blocked by the outer cover.

3. The air pump according to claim 2, characterized in that The air duct is formed with an air duct opening and a ring wall surrounding the air duct opening at one end where the joint is set. The first column portion of the joint is located in the air duct and surrounded by the ring wall, and the second column portion of the joint protrudes from the air duct opening and is inserted into the opening of the outer cover.

4. The air pump according to claim 3, characterized in that The outer cover is sleeved on the annular wall and is welded and combined with the annular wall.

5. The air pump according to claim 2, characterized in that The air duct forms a receiving groove at one end where the joint is arranged, the interior of the receiving groove is communicated with the internal space of the air duct, the first column portion of the joint is located in the internal space of the air duct, and the second column portion of the joint is located in the receiving groove, and the outer cover is combined with the interior of the receiving groove to surround the second column portion of the joint and block the first column portion of the joint.

6. The air pump according to any one of claims 1 to 5, characterized in that The inflation mechanism includes an outer tube, a separator and an inner tube. The inner tube is fixed to the internal space of the air duct. The outer tube is sleeved with the inner tube. The separator is connected to the outer tube and divides the internal space into a first chamber and a second chamber. The outer tube and the separator can move back and forth in the internal space, thereby driving the gas from one of the first chamber and the second chamber into the outer tube, the inner tube, and flows to the joint.

7. The air pump according to claim 6, characterized in that The partition seat is hollow, and the interior of the partition seat is connected with the interior of the outer tube. Two gaps are formed between the partition seat and the inner wall of the air duct. The first chamber and the second chamber of the internal space are connected to the interior of the partition seat through a corresponding one of the gaps. The inflation mechanism includes at least one O-ring, which surrounds the partition seat, abuts against the inner wall of the air duct, and can be driven by the partition seat to block one of the gaps.

Images