Air inlet valve of lighter

Abstract

The utility model relates to an air inlet valve of a lighter. The air inlet valve comprises an air inlet valve body which is integrally formed by pouring, an axial through hole is formed in the air inlet valve body in the axial direction from an opening in the lower end of the air inlet valve body. A spring and an air adding valve element are sequentially installed in the axial through hole from the opening in the lower end of the air inlet valve body. The air inlet valve body is provided with a radial through hole penetrating in the radial direction, and the radial through hole is located in the upper half portion of the axial through hole and communicated with the axial through hole. An adjusting rod is integrally formed on the air inlet valve body, or the adjusting rod is fixedly connected to the air inlet valve body. According to the scheme, the air inlet valve body is made of zinc alloy materials, so that material cost is reduced, the structure is improved, and the strength of the joint of the valve body and the adjusting rod is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of lighter accessories, in particular to a lighter air inlet valve. Background Art

[0002] The structure of the lighter air inlet valve in the prior art is as Figure 1 shown. There is a gas filling valve core that can slide in the copper valve body in the copper valve body 01. There is an axial air hole in the gas filling valve core. A rubber first sealing ring that can seal the radial through hole is sleeved on the gas filling valve core. One end of the copper adjusting rod 02 extends into the copper valve body 01, and the end contacts the rubber first sealing ring. One end of the copper adjusting rod 02 extending into the copper valve body 01 has an axial air passage 021. In the prior art, the copper valve body and the copper adjusting rod of the air inlet valve are independent components, which are respectively produced by turning machining on a lathe, and the production efficiency is low. Moreover, the cost of copper materials is relatively high, and for small-sized parts such as lighter air inlet valves, the cost of copper casting molds in the prior art is high and the process difficulty is very great, which is difficult to achieve. If other materials are used to make the above copper valve body, since one end of the adjusting rod extending into the valve body has an axial air passage, and the wall thickness of the end of the adjusting rod where the axial air passage is provided is very thin due to the small size of the adjusting rod, if the connection method of the above copper adjusting rod and the copper valve body is still adopted, the end of the adjusting rod provided with the axial air passage is very likely to be deformed during press-fitting assembly, resulting in a high failure rate of the air inlet valve body. Summary of the Invention

[0003] In order to solve the above problems, the purpose of the utility model is to provide a lighter air inlet valve, the main body of which is made of zinc alloy material to make the air inlet valve body to reduce the material cost, and the strength at the connection between the valve body and the adjusting rod is ensured by improving its structure.

[0004] A lighter air inlet valve includes an integrally cast air inlet valve body; an axial through hole is axially provided inside the air inlet valve body from its lower end opening; a spring and a gas filling valve core are sequentially installed into the axial through hole from the lower end opening of the air inlet valve body; a radially penetrating radial through hole is provided on the air inlet valve body, and the radial through hole is located in the upper half of the axial through hole and communicates with the axial through hole; an adjusting rod is integrally formed on the air inlet valve body, or an adjusting rod is fixedly connected to the air inlet valve body.

[0005] The gas filling valve core can move axially between a first position and a second position under an external force; a radial air hole communicating with its air passage is provided on the gas filling valve core. The first sealing ring is sleeved on the outer periphery of the gas filling valve core. When the gas filling valve core is in the first position, the first sealing ring closes the radial air hole on the gas filling valve core. When the gas filling valve core is in the second position, the radial air hole of the gas filling valve core is exposed upward and communicates with the axial through hole and the radial through hole.

[0006] For the lighter intake valve with the above structure, in the solution where the intake valve body and the adjusting rod are integrally cast, the adjusting rod and the intake valve body are integrally cast, which can ensure its overall strength and is conducive to improving the subsequent assembly efficiency. An integrally formed intake valve body is provided, and an axial through-hole (axial air hole) is arranged in the intake valve body. On the premise of ensuring the air passage required for the intake valve, there is no need to provide the axial air hole structure in the prior art on the adjusting rod. Therefore, even if an adjusting rod with a split structure from the intake valve body is adopted, since there is no need to provide an axial air hole structure on the adjusting rod, the wall thickness of the connecting end of the adjusting rod can be increased to ensure the structure at the connection of the adjusting rod and prevent deformation during the assembly process. Moreover, by adopting a detachable connection method between the intake valve body and the adjusting rod, only one set of molds needs to be set for the intake valve body during production, and assembling with adjusting rods of different lengths can meet different length size requirements. Preferably, in a specific embodiment, a shorter adjusting rod is integrally formed on the intake valve body, and for a longer adjusting rod, an adjusting rod independently processed from the intake valve body is adopted. Since in actual processing, it is more difficult to demold the slender rod structure, independently processing the longer adjusting rod is more likely to ensure the product qualification rate and reduce production costs.

[0007] Preferably, the intake valve body is made of zinc alloy material. The cost of zinc alloy material is much lower than that of copper material, and for small-size molds, the zinc alloy casting and pouring processing technology is simpler. Even though the strength of zinc alloy is lower than that of copper, the above structure can meet the strength requirements of the intake valve body.

[0008] Preferably, the axial through-hole is axially divided into two coaxial parts, namely a first through-hole and a second through-hole. The first through-hole is located above the second through-hole and the aperture of the first through-hole is smaller than that of the second through-hole. Due to the change in radial dimension at the connection of the first through-hole and the second through-hole, a limiting step is formed in the intake valve body; a compression cap is arranged in the second through-hole, and a first sealing ring is located between the limiting step and the upper end of the compression cap. By adopting the method of press-fitting and fixing through the compression cap, batch press-fitting can be carried out during assembly, which can greatly improve the assembly efficiency.

[0009] Preferably, a second sealing ring is arranged between the compression cap and the inner wall of the axial through-hole of the intake valve body. Even if some gas leaks from the gap of the first sealing ring after long-term use, the overall sealing effect can still be ensured through the second sealing ring.

[0010] Preferably, an insertion part extends upward along the central axis at the upper end of the intake valve body, and an insertion hole matching the insertion part is arranged at the lower end of the adjusting rod. The lower end of the adjusting rod is in insertion fit with the connecting seat, and the assembly is simple.

[0011] Preferably, the width of the insertion part is greater than the width of the upper end of the axial through hole; after the adjusting rod is inserted into the connecting seat, the outer peripheral surface of the adjusting rod is flush with the outer peripheral surface of the upper end of the air inlet valve body. With the above dimensions set, compared with the prior art solution of arranging axial air holes at the end of the adjusting rod, the thickness of the insertion hole wall can be increased, thereby ensuring the strength of the insertion connection. Brief Description of the Drawings

[0012] Figure 1 is a schematic structural diagram of a lighter air inlet valve in the prior art;

[0013] Figure 2 is a cross-sectional view of the lighter air inlet valve of Embodiment 1;

[0014] Figure 3 is a cross-sectional view of the lighter air inlet valve of Embodiment 2.

[0015] Reference Numerals:

[0016] Air inlet valve body 1, axial through hole 11, radial through hole 12, insertion part 13, spring 2, gas filling valve core 3, limiting edge 31, first sealing ring 4, pressing cap 5, adjusting rod 6. Detailed Description of the Embodiments

[0017] The embodiments of the present invention will be described in detail below. Embodiment

[0018] As Figure 2 shown, this embodiment provides a lighter air inlet valve, including an integrally cast air inlet valve body 1. The air inlet valve body 1 is provided with an axial through hole 11 inside along the axial direction from its lower end opening. The air inlet valve body 1 is provided with a radially penetrating radial through hole 12, and the radial through hole 12 communicates with the axial through hole 11; a spring 2 and a gas filling valve core 3 are sequentially inserted into the axial through hole 11 from the lower end opening of the air inlet valve body 1. The gas filling valve core can move axially between a first position and a second position under an external force, and at the same time drive the spring to expand and contract; the gas filling valve core 3 is provided with a radial air hole communicating with its air passage. A first sealing ring 4 is sleeved on the outer periphery of the gas filling valve core 3. When the gas filling valve core 3 is in the first position, the first sealing ring 4 closes the radial air hole on the gas filling valve core 3. When the gas filling valve core 3 is in the second position, the radial air hole of the gas filling valve core is exposed upward and communicates with the axial through hole 11 and the radial through hole 12; an adjusting rod 6 is integrally formed on the upper part of the air inlet valve body 1, and the adjusting rod 6 is provided with an external thread.

[0019] For the lighter intake valve with the above structure, the adjusting rod 6 and the intake valve body 1 are integrally cast, which can ensure its overall strength and is conducive to improving the subsequent assembly efficiency. Its working principle is as follows: When there is no gas added at the lower part of the intake valve body, the gas filling valve core 3 is in the first position, and the first sealing ring seals the radial air holes on the gas filling valve core 3, and the air passage in the gas filling valve core is not connected to the air passage in the intake valve body; When gas is added at the lower part of the intake valve body, the gas filling valve core 3 moves upward to the second position under the action of air pressure, and the radial air holes of the gas filling valve core are exposed upward and communicated with the axial through hole 11 and the radial through hole 12. At this time, the air passage of the gas filling valve core is connected to the air passage of the intake valve body, thus realizing the function of the intake valve itself.

[0020] In the embodiment, the intake valve body is made of zinc alloy material. The cost of zinc alloy material is much lower than that of copper material, and for small-sized molds, the zinc alloy casting and pouring processing technology is simpler. Even though the strength of zinc alloy is lower than that of copper, the above structure can meet the strength requirements of the intake valve body 1.

[0021] The axial through hole 11 is axially divided into two parts: a first through hole and a second through hole that are coaxially arranged. The first through hole is located above the second through hole and the aperture of the first through hole is smaller than that of the second through hole. Due to the change in radial dimension at the connection of the first through hole and the second through hole, a limiting step is formed inside the intake valve body 1; A compression cap 5 is provided in the second through hole, and the first sealing ring 4 is located between the limiting step and the upper end of the compression cap 5. Thus, the gas filling valve core and the first sealing ring are held in the axial through hole of the intake valve body by the compression cap to prevent the gas filling valve core from falling off. And during installation, the spring 2, the gas filling valve core 3, and the first sealing ring 4 are successively inserted into the axial through hole 11 from bottom to top, and then the compression cap 5 is pressed in place. By using the compression cap 5 to achieve the press-fitting and fixing method, batch press-fitting can be carried out during assembly, which can greatly improve the assembly efficiency.

[0022] It should be further noted that the outer peripheral surface of the first sealing ring 4 remains in contact with the inner wall of the axial through hole of the intake valve body 1, and the relative position between the outer peripheral surface of the first sealing ring 4 and the intake valve body 1 remains unchanged, so as to ensure its sealing effect.

[0023] In a preferred embodiment, a second sealing ring (the second sealing ring is not shown in the figure) is provided between the compression cap and the inner wall of the axial through hole of the intake valve body 1. Thus, even if some gas leaks from the gap of the first sealing ring after long-term use, the overall sealing effect can still be ensured by the second sealing ring. In a specific embodiment, an installation groove can be provided on the outer periphery of the compression cap, and the second sealing ring is arranged in this installation groove and installed in place together with the compression cap.

[0024] The radial through-hole 12 communicates with the first through-hole. The spring 2 is located in the first through-hole. A limiting edge 31 is provided radially on the upper part of the gas filling valve core 3. The outer diameter of the limiting edge 31 is smaller than the aperture of the first through-hole, and the upper end of the limiting edge 31 abuts against the lower end of the spring 2. The spring 2 is located in the first through-hole, and the upper limit of the spring 2 is provided by the upper end wall of the first through-hole. According to the dimensional relationship and positional relationship between the first through-hole and the second through-hole, the outer diameter of the spring 2 is smaller than the inner diameter of the first through-hole, and the spring 2 can be loaded into the first through-hole from the lower opening of the air inlet valve body 1, and then the gas filling valve core 3 is loaded from the lower opening of the air inlet valve body 1 to form a connection with the lower end of the spring 2, ensuring that the lighter air inlet valve can achieve its basic functions. The first sealing ring 4 is made of rubber first sealing ring 4 and can elastically deform. The setting of the first sealing ring 4 ensures the airtightness in the first through-hole.

[0025] The assembly method of this embodiment is as follows: Embodiment

[0026] As Figure 3 shown, the difference between this embodiment and Embodiment 1 is that the adjusting rod 6 is a split structure, and the adjusting rod 6 is fixedly connected to the upper end of the air inlet valve body 1.

[0027] The axial through-hole 11 (axial air hole) is arranged in the air inlet valve body 1. On the premise of ensuring the air passage required by the air inlet valve, there is no need to arrange the axial air hole structure in the prior art on the adjusting rod 6. Therefore, even if the adjusting rod 6 with a split structure from the air inlet valve body 1 is adopted, since there is no need to arrange the axial air hole structure on the adjusting rod 6, the wall thickness of the connecting end of the adjusting rod 6 can be increased to ensure the structure at the connection of the adjusting rod 6 and prevent deformation during the assembly process. Moreover, by adopting the detachable connection method between the air inlet valve body 1 and the adjusting rod 6, only one set of molds needs to be set for the air inlet valve body 1 during production, and assembling with different lengths of adjusting rods 6 can meet different length size requirements. Preferably, in a specific embodiment, the shorter adjusting rod 6 is integrally formed on the connecting seat by the manufacturing method of the adjusting rod 6, and for the longer adjusting rod 6, the adjusting rod 6 is processed independently of the air inlet valve body 1. Since in actual processing, the demolding of the slender rod structure is more difficult, processing the longer adjusting rod 6 independently is more likely to ensure the product qualification rate and reduce the production cost.

[0028] In a preferred embodiment, a plug-in portion 13 extends upward along the central axis at the upper end of the air inlet valve body 1, and a plug-in hole matching the plug-in portion 13 is provided at the lower end of the adjusting rod 6. The lower end of the adjusting rod 6 is in plug-in fit with the air inlet valve body 1, and the assembly is simple.

[0029] Preferably, the width of the insertion portion 13 is greater than the width of the upper end of the axial through hole 11; after the adjusting rod 6 is inserted into the intake valve body 1, the outer peripheral surface of the adjusting rod 6 is flush with the outer peripheral surface of the upper end of the intake valve body 1. With the above dimensions set, compared with the prior art solution of providing an axial air hole at the end of the adjusting rod 6, the thickness of the insertion hole wall can be increased, thereby ensuring the strength of the insertion connection.

[0030] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A lighter intake valve, characterized in that, It includes an air inlet valve body integrally cast and formed; an axial through hole is provided axially inside the air inlet valve body from its lower end opening, and a spring and an air charging valve core are sequentially inserted into the axial through hole from the lower end opening of the air inlet valve body; a radially through radial through hole is provided on the air inlet valve body, and the radial through hole is located in the upper half of the axial through hole and communicates with the axial through hole; an adjusting rod is integrally formed on the air inlet valve body, or an adjusting rod is fixedly connected to the air inlet valve body.

2. The gas inlet valve of a lighter according to claim 1, characterized in that, The air inlet valve body is made of zinc alloy material.

3. The gas inlet valve of a lighter according to claim 1 or 2, characterized in that, The air charging valve core can move axially between a first position and a second position under an external force; a radial air hole communicating with its air passage is provided on the air charging valve core, a first sealing ring is sleeved on the outer periphery of the air charging valve core, and when the air charging valve core is in the first position, the first sealing ring closes the radial air hole on the air charging valve core, and when the air charging valve core is in the second position, the radial air hole of the air charging valve core is exposed upward and communicates with the axial through hole and the radial through hole.

4. The inlet valve of a lighter according to claim 3, characterized in that, The axial through hole is axially divided into two coaxial parts, namely a first through hole and a second through hole. The first through hole is located above the second through hole and the aperture of the first through hole is smaller than that of the second through hole. A limiting step is formed inside the air inlet valve body due to the change of the radial dimension at the connection of the first through hole and the second through hole; a pressing cap is provided in the second through hole, and the first sealing ring is located between the limiting step and the upper end of the pressing cap.

5. A lighter intake valve according to claim 1 or 2, characterized in that, A second sealing ring is provided between the pressing cap and the inner wall of the axial through hole of the air inlet valve body.

6. The inlet valve of a lighter according to claim 1 or 2, characterized in that An insertion part extends upward along the central axis at the upper end of the air inlet valve body, and an insertion hole matching the insertion part is provided at the lower end of the adjusting rod.

7. The intake valve of a lighter according to claim 6, characterized in that The width of the insertion part is greater than the width of the upper end of the axial through hole; after the adjusting rod and the connecting seat are inserted, the outer peripheral surface of the adjusting rod is flush with the outer peripheral surface of the connecting seat.

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