WO2007137450A1

WO2007137450A1 - A no-regulation flow restrictor for a gas valve of lighter and a dedicated processing mould

Info

Publication number: WO2007137450A1
Application number: PCT/CN2006/001126
Authority: WO
Inventors: Ziqiang Huang
Original assignee: Huang, Fengjing
Priority date: 2006-05-29
Filing date: 2006-05-29
Publication date: 2007-12-06

Abstract

A no-regulation flow restrictor for a gas valve of lighter and a dedicated processing mould are disclosed. Said no-regulation flow restrictor includes a gas filter film (1) and a seal gasket (2) adhered to one side or two sides of the gas filter film (1). The seal gasket (2) is made of resilient microporous material permeable to air. It features that the gas filter film (1) and the seal gasket (2) are fused integrally together in their edges, and the seal gasket (2) has the same material as the gas filter film (1) or has material fused with the gas filter film (1). The dedicated processing mould includes a concave mould assembly with a punching-shear cavity (7) and an upper mould assembly with a punch head (9). The punch head (9) is larger than the punching-shear cavity (7) in section, and its front end surface is smaller than the section of the punching-shear cavity. The front end surface and side surface of the punch head (9) is transiting from an inclined surface or a cambered surface, where the section is the same as the punching-shear cavity in shape. A resilient layer (11) is provided at the end of the punch head (9), and via the resilient layer (11) a mould pressure is applied on the punch head (9).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an unregulated current limiting device for a gas valve of a lighter. BACKGROUND OF THE INVENTION In order to solve the problem that the existing air outlet valve device has the characteristics of no adjustment and high flame stability, most parts of the air outlet valve device can utilize commercially available standard parts without re-customizing, and it is not necessary to re-manufacture multiple molds. Therefore, the cost of using the technology is increased. The applicant has applied for an application number of 200520072423 on June 1, 2005. A utility model patent entitled "A Light Limiting Device for a Lighter Outlet Valve" discloses a utility model patent. Adjustable current limiting device. The unregulated current limiting device comprises a gas filter membrane and a gasket made of a gas permeable elastic material: one or both sides of the membrane membrane. However, such an unregulated current limiting device also exposes some problems in practical applications: Since the gas filter membrane and the gasket are made of a thin sheet and are not integrated, it is very inconvenient in assembly application. Existing bonding processes are usually only applied by adhesive or by high frequency heat sealing or laser melting. However, since the adjustable current limiting device is limited by the external size of the lighter itself, its size is very small, and the diameter is generally between 2. 5 and 4. 5 mm. It is difficult to meet this special requirement with the existing bonding process: In the adhesive coating method, it is difficult to precisely control the amount and position of the coating during the bonding process of the filter membrane and the gasket, and it is easy to cause the ventilation of the gas permeable pores to be inconsistent, which affects the product quality; In the way, because the fusion line is relatively wide and coking, it is difficult to make a small size, which will cause an increase in the filter film and the gasket material, and affect the sealing performance. When the laser is melted, the edge will be melted inward. The shrinkage affects the sealing performance, and the cutting cost is very high, and the existence of the above problems becomes a huge obstacle to the rapid promotion of the unregulated current limiting device." SUMMARY OF THE INVENTION - The object of the present invention is to provide an economical solution to overcome the deficiencies of the prior art. The material, the quality is stable and the processing is convenient. The lighter valve is free from adjustable current limiting device.

Another object of the present invention is to provide a fast, efficient, and economical processing-specific mold for bonding the unregulated current limiting device into one.

In order to achieve the above object, the present invention adopts the following technical solutions: An adjustable current limiting device for a gas valve of a lighter, comprising a gas filter membrane and a gasket made of a gas permeable elastic microporous material attached to one or both sides of the membrane membrane. a sheet, characterized in that: the filter film and the edge of the gasket are integrally joined together, and the gasket is made of the same or a fusion material as the membrane. Quality.

The ventilation of the unregulated current limiting device is only related to the air permeability of the filter membrane. When the gas permeability of the membrane is constant, the ventilation will remain unchanged, so that the lighter equipped with the adjustable current limiting device is shipped. There is no need to inflate the adjustment and adjust the height of the flame to ensure that the lighter is stable and meets the standard flame height when used. Compared with the prior art, since both sides of the filter film are provided with a gasket made of a gas permeable elastic microporous material and integrated, the assembly is very convenient; in addition, when the adjustable current limiting device is installed When the joint is pressed by the gas valve assembly, the pressed portion becomes a dense, gas-tight state, and the area of the middle portion becomes a gas permeable area, and since the sealing gasket has a certain elasticity, the sealing surface has a good sealing property. There is no need to install a separate gasket.

The special mold for making the adjustable current limiting device comprises a lower die assembly provided with a punching cavity and an upper die assembly provided with a punch, the punch cross section being slightly larger than the punching cavity section, and the front end face being smaller than the punching Shear cavity section, the front end surface and the side surface of the punch are transitioned by a slope or a curved surface. The cross-sectional shape of the transition is the same as that of the section of the punching cavity. The end side of the punch is provided with an elastic layer, and the mold pressure acts on the elastic layer. Punch.

Because the cross section of the punch is slightly larger than the cross section of the punching cavity, the front end surface is smaller than the cross section of the punching cavity, and the front end surface and the side surface of the punch are transitioned by the inclined surface or the curved surface, so the two layers are sealed and sandwiched between the two. When the filter membrane in the layer gasket is punched and sheared, the slope or the curved surface at the front end of the punch has a short rolling process with the punching cavity, and the gasket is preferably the same or blended with the membrane. Material, because the gasket is made of the same or a combination of the gas filter membrane, the partial pressure will be generated during the rolling process, and the sealing gasket and the membrane will be broken along the punching line. mix together. This method has the advantages of high production speed, no need of adhesive, no inconsistency in ventilation caused by clogging of the venting micropores, and the fusion line is also fine, which saves the filter membrane and the gasket material.

The invention will now be further described with reference to the accompanying drawings and specific embodiments. DRAWINGS

1 is a schematic structural view of a specific embodiment of an adjustment-free current limiting device of the present invention;

2 is a schematic structural view of another embodiment of the adjustable current limiting device of the present invention; FIG. 3 is a cross-sectional view showing the structure of a special processing die according to the present invention;

Figure 4 is a partial enlarged view of Figure 3; '

Figure 5 is a schematic exploded view of a specific embodiment of a special processing die of the present invention; Figure 6 is a schematic view of another arrangement of a punching cavity;

Figure 7 is a schematic view of the actual application of the present invention; As shown in FIG. 1 , the unregulated current limiting device includes a gas filter membrane 1 and a gasket 2 , and the gasket 2 is the same as the membrane membrane 1 (acrylic) or a fusion material, and the fusion material means that it can be melted. The gas membrane 1 is composed of a film having extremely fine pores, and may be a single layer or a plurality of layers. The diameter of the pores of the membrane 1 is equivalent to the size of the gas molecules, and the shape may be The diameter of the lower end of the valve seat of the outlet valve is not too large, and should not be too small. The diameter is preferably close to the lower end of the valve seat of the outlet valve. Of course, the adjustable current limiting device can be other shapes, as long as it is larger than The annular sealing surface at the lower end of the outlet valve seat. A sealing gasket 2 made of a gas permeable elastic microporous material is attached to one side of the gas filtering membrane 1 (as shown in FIG. 2) or both surfaces, and preferably, a gas permeable membrane 2 is attached on both sides to make the performance of both sides uniform. It is not necessary to distinguish when assembling, and it is convenient for production. The membrane 1 and the gasket 2 are connected together to form a unit. The micropores or air gaps of the elastic microporous material are large, and are generally several hundred times or more of the micropores of the gas filter membrane, that is, the gasket 2 may be a material having an air gap such as a nonwoven fabric or a sponge. Elastic microporous material made of foamed material.

As shown in Figures 3 to 5, the specific structure of the stamping die includes a lower die assembly and an upper die assembly. The lower die assembly includes a lower die plate 3, a concave die plate 4, a punch guide plate 5 and a return spring 6, and the lower die plate 3 is composed of a square thick iron plate, and the concave die plate 4 is also composed of a square thick iron plate smaller than the lower die plate 3, concave The middle portion of the template 4 is provided with a plurality of punching cavities 7 formed by a plurality of vertical circular through holes. The cross-sectional shape of the punching and shearing cavity 7 is the same as that of the unregulated current limiting device, and the punching and shearing cavity 7 is preferably provided with the transition surface 91. The chamfering 71 can improve the fusion effect of the filter membrane 1 and the gasket 2, and the punching cavity 7 is evenly arranged in a square shape, and the adjacent two rows of punching cavities 7 are preferably staggered, as shown in FIG. This is beneficial to save material and improve the yield. The concave template 4 is fixed on the middle of the lower template 3. The lower template 3 is provided with a through discharge opening 17 corresponding to the array of punching cavities 7. The punch guide 5 is fixed at On the concave die plate 4, the punch guide plate 5 is provided with a punching guide hole 8 corresponding to the punching cavity 7 in the number and position. The axis of the punch guiding hole 8 coincides with the axis of the punching cavity 7, the punch The guide hole 8 is slidably engaged with the punch 9, and the punch guide 5 is preferably thicker than the concave template 4, so that the punch guide hole 8 is sufficient The length is to ensure the accuracy; the upper mold assembly includes the punch 9, the punch fixing plate 13, the upper die plate 10, the elastic block Γΐ and the cover plate 12. The cross-sectional shape of the punch 9 is preferably the same as that of the punching cavity 7, that is, Cylindrical, vertically fixed to the punch fixing plate 13 by the end, as shown in FIG. 4, the front end surface of the punch 9 is smaller than the cross section of the punching cavity 7, and the front end surface of the punch 9 is provided with a slope or The transition surface 91 formed by the curved surface ensures that the transition portion has a cross-sectional shape identical to that of the cross-section of the punching cavity 7. The upper die plate 10 is provided with a concave punch fixing plate sliding cavity 14, and the bottom of the sliding cavity 14 is provided. The punch hole 15 corresponding to the punch 9 is penetrated, the punch 9 is gap-fitted with the punch hole 15, and the punch fixing plate 13 is inserted into the punch fixing plate slide chamber 14 together with the punch 9 and The front end of the punch 9 is inserted into the punch guide hole 8 through the punch hole 15 , and the elastic block 11 is placed on the punch fixing plate 13 of the punch fixing plate sliding chamber 14 and pressed thereon. The cover plate 12 can be divided into two parts: a main body and a bottom plate for facilitating the manufacture of the upper die plate 10; the surface of the punch guide plate 5 and the concave die plate 4 Is provided with longitudinal grooves through the feed channel 16 is configured. The upper mold assembly and the lower female mold assembly may be respectively mounted on the upper and lower mold base plates of a set of mold bases. As shown in Fig. 7, when in use, the unregulated current limiting device can be directly placed in the inner joint 18 of the existing air box outlet, and then screwed into the existing air valve assembly 19 to press, the gas valve assembly The bottom end of the valve seat of 19 is provided with a cavity 20, and the valve seat is pressed on the adjustable current limiting device. If only one side is provided with the sealing gasket 2, it is preferable that the side of the sealing gasket 2 is placed upward, so that The sealing effect is better, the area of the cavity 20 is the gas permeable area, and the annular edge of the cavity 20 is the sealing surface.

Claims

Rights request

1 . An adjustable current limiting device for a gas valve of a lighter, comprising a gas filter membrane and a gasket made of a gas permeable elastic microporous material attached to one or both sides of the membrane membrane, wherein: the filter gas The edges of the membrane and the gasket are fused together to form a unit, and the gasket is made of the same or a combination of the membrane.

2. The adjustable current limiting device for a gas fire door of a lighter according to claim 1, wherein the adjustable current limiting device is circular.

3. The adjustable current limiting device for a lighter gas valve according to claim 1 or 2, wherein: the filter film and the gasket are non-woven elastic microporous materials.

4. A special processing die for manufacturing the adjustable current limiting device of claim 1, comprising a lower die assembly having a punching cavity and an upper die assembly having a punch, wherein: The front end surface of the punch is smaller than the cross section of the punching cavity, and a transition surface formed by a slope or an isolated surface is provided between the front end surface and the side surface of the punch, and the transition portion has a cross-sectional shape identical to the shape of the cross section of the punching cavity. An elastic layer is provided in the mold pressure transmission passage to cause the mold pressure to act on the punch through the elastic layer.

A special processing die according to claim 4, wherein: said punching cavity is provided with a chamfer that matches the transition surface.

6. The special processing die according to claim 4 or 5, wherein: the concave die assembly comprises a lower die plate, a concave die plate, a punch guide plate and a return spring, and the concave die plate is evenly arranged a plurality of punching cavities formed by a plurality of vertical through holes, the concave template is fixed on the lower die plate, the punch guide plate is fixed on the concave die plate, and the punch guide plate is provided with a punching, number and position corresponding to the punching cavity a head guide hole, an axis of the punch guide hole coincides with the axis of the punching cavity, and the punch guide hole is slidingly matched with the punch; the upper die assembly includes a punch, a punch fixing plate, an upper die plate, an elastic block and a cover The punch is fixed vertically on the punch fixing plate by the end, and the upper die plate is provided with a concave punch fixing plate sliding cavity, and the bottom of the sliding cavity is provided with a punch which has a number and position corresponding to the punch The hole, the punch and the punch hole are matched with each other, and the punch fixing plate is inserted into the sliding cavity of the punch fixing plate together with the punch and can slide in the punching direction, and the front end of the punch is inserted out from the punch hole and inserted into the punch guide. In the hole, the elastic block is placed in the sliding cavity of the punch fixing plate The upper surface of the punch fixing plate constitutes an elastic layer and is fixed by pressing the cover plate; the surface of the punch guiding plate and the concave guiding plate is provided with a groove extending in front and rear to constitute a feeding passage.

The special processing die according to claim 4 or 5, wherein: the adjacent two rows of punching cavities are staggered.

8. The special processing die according to claim 6, wherein: the adjacent two rows of punching cavities are staggered.

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