High-pressure-resistant injection molding integrated miniature gas generator

Abstract

The utility model discloses a high-pressure-resistant injection-molded integrated miniature gas generator, and aims to provide a high-pressure-resistant injection-molded integrated miniature gas generator with an anti-rotation characteristic, which comprises a medicine cup, the bottom of the metal shell is in sealed connection with the open end of the medicine cup and fixedly connected with the medicine cup through injection molding, and a groove is formed in the top of the metal shell; the center hole is located in the center of the bottom of the groove and is of a quadrilateral structure with four arc-shaped vertexes; one end of the ignition tube is located in the medicine cup, and the other end of the ignition tube penetrates through the center hole to be located in the groove and is fixedly connected with the metal shell into a whole through injection molding. The anti-rotation ignition tube has the advantages that the center hole is designed to be of the quadrangular structure with the four arc-shaped vertexes, and compared with a circular structure, the anti-rotation ignition tube achieves the purpose that an injection molding body has the anti-rotation characteristic when the ignition tube is subjected to injection molding.

Description

Technical Field

[0001] This utility model relates to the technical field of gas generators, and in particular to a high-pressure injection molding integrated micro gas generator. Background Technology

[0002] The current gas generator works by inputting an electric current through a pin into the electric ignition tube, which then ignites the tube. The ignition tube releases a flame, igniting the propellant in the container. The propellant then begins to burn, releasing high-temperature gas and flame. The pressure inside the container rises rapidly. When the pressure reaches a certain value, it breaks through the weak point at the bottom of the container and is released into the tube, thus protecting the driver.

[0003] The current miniature generator mainly consists of a short-circuit clamp, a rubber ring, an ignition tube, an injection-molded base, a metal casing, a gas-generating agent, and a reagent cup. The metal casing has a central hole for mounting the ignition tube, which is fixedly connected to the metal casing via injection molding. However, in existing technology, the central hole inside the metal casing is mostly circular, which means the injection-molded body lacks anti-rotation properties, thus hindering the generator's lifespan. Utility Model Content

[0004] The present invention aims to overcome the shortcomings of existing technologies where the central hole in the metal shell prevents the injection molded body from having anti-rotation properties, and provides a high-pressure injection molded integrated micro gas generator with anti-rotation properties.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high-pressure resistant, injection-molded integrated micro gas generator, comprising:

[0007] Medicine cup;

[0008] The metal outer shell has its bottom sealed to the opening end of the medicine cup and is fixedly connected to the medicine cup by injection molding, and its top is provided with a groove;

[0009] The central hole is located at the bottom center of the groove and is a quadrilateral structure with all four vertices being arc-shaped.

[0010] The ignition tube has one end located inside the medicine cup and the other end passing through the central hole and located in the groove. It is fixedly connected to the metal shell by injection molding and forms an integral unit. Assembling the ignition tube and the metal shell by injection molding eliminates the need for additional machining and welding, resulting in low cost and convenient and quick production. Furthermore, the central hole is designed as a quadrilateral structure with four arc vertices. Compared to a circular structure, this design provides anti-rotation properties to the injection molded body, ensuring that rotation will not affect the airtightness and strength of the generator.

[0011] Preferably, the diameter of the groove gradually decreases inward from its bottom to its opening end, which helps to improve sealing performance and overall strength.

[0012] Preferably, the inner wall of the groove is threaded. This further improves the sealing performance, overall strength, and anti-rotation properties.

[0013] Preferably, the open end of the medicine cup has an arc-shaped surface tangent to it, and the open end of the medicine cup is folded outward through the arc-shaped surface to form a flange. The bottom center of the metal outer shell has a mating groove, and the groove communicates with the mating groove through a central hole. The bottom edge of the mating groove has rounded corners, and the side wall of the mating groove has an annular groove that matches the flange. The metal outer shell is connected to the open end of the medicine cup through the annular groove and the flange, and the open end of the mating groove is connected to the outer side wall of the medicine cup. This structural design improves the strength of the connection between the metal outer shell and the medicine cup, enhances the structural robustness and stability, and provides good airtightness at the connection point between the metal outer shell and the medicine cup.

[0014] Preferably, a rubber ring is provided within the annular groove, and the rubber ring is located on the flange. The metal outer shell is sealed to the open end of the medicine cup through the rubber ring. This further improves the airtightness of the connection between the metal outer shell and the medicine cup.

[0015] Preferably, the system also includes an injection-molded body. One end of the injection-molded body fills the area formed by the mating groove and the opening of the medicine cup. The other end of the injection-molded body passes through the central hole, matches the groove, and extends outward to the outside of the metal casing. The end of the injection-molded body outside the metal casing has a mounting groove. One end of the ignition tube, after being injection-molded by the injection-molded body, is fixedly connected to the bottom of both the medicine cup and the metal casing. The other end of the ignition tube is located within the mounting groove. The mounting groove facilitates plug-and-play connection with external circuitry, enabling the ignition tube to release a flame after current is input. The injection-molded body structure allows the metal casing, ignition tube, and medicine cup to be fixedly connected as a single unit, improving overall airtightness and strength.

[0016] Preferably, the bottom outer wall of the mounting groove matches and fits against the side wall of the recess to form an inwardly recessed groove, and the top outer wall of the mounting groove is connected and fixed to the open end face of the recess. This design ensures that the side wall of the recess is confined within the groove, further improving the overall airtightness and strength.

[0017] Preferably, the ignition tube includes a sleeve and two electrodes. One end of each electrode is fixedly connected to the sleeve and, after injection molding, is fixedly connected to the bottom of the medicine cup and the metal casing, respectively. The other end of each electrode passes through a central hole and is located in a mounting groove. The portion of the electrode passing through the central hole is fixedly connected to the central hole via the injection molding body. The injection molding structure allows the metal casing, sleeve, electrodes, and medicine cup to be fixedly connected into a single unit, which helps improve overall airtightness and strength.

[0018] The beneficial effects of this utility model are as follows: The ignition tube and metal shell are assembled by injection molding, eliminating the need for additional machining and welding, resulting in low cost, convenient and quick production, no impact on the performance of the ignition tube, and a reduction in the number of parts; the central hole is designed as a quadrilateral structure with four arc-shaped vertices, which, compared to a circular structure, provides anti-rotation properties to the injection molded body during ignition tube injection, ensuring that the injection molded body will not affect the airtightness and strength performance of the generator due to rotation; the metal shell is designed with a constricted outer edge and a threaded inner side to prevent rotation, which is beneficial to the generator's sealing performance and overall strength. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] In the diagram: 1. Medicine cup, 2. Metal outer shell, 3. Groove, 4. Center hole, 5. Ignition tube, 6. Thread, 7. Flanged edge, 8. Mating groove, 9. Rounded corner, 10. Annular groove, 11. Rubber ring, 12. Injection molded body, 13. Mounting groove, 14. Slot, 15. Tube sleeve, 16. Electrode. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0022] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0023] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of components illustrated in these embodiments do not limit the scope of this application. For ease of illustration, spatial relative terms such as “upper,” “lower,” “left,” and “right” are used in the embodiments to describe the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that, in addition to the orientations shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figures is inverted, an element described as being “below” other elements or features would be fixed “upper” to other elements or features. Thus, the exemplary term “lower” can include both upper and lower orientations. The device may be fixed in other ways (rotated 90 degrees or located in other orientations), and the spatial relative descriptions used herein can be interpreted accordingly. It should also be understood that, for ease of description, the dimensions of the various parts shown in the figures are not drawn to actual scale. Techniques, processes, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, processes, and equipment should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be discussed further in subsequent figures.

[0024] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0025] like Figure 1 In the described embodiment, a high-pressure resistant injection-molded integrated micro gas generator includes: a medicine cup 1; a metal shell 2, the bottom of which is sealed to the open end of the medicine cup 1 and fixedly connected to the medicine cup 1 by injection molding, and the top of which is provided with a groove 3; a central hole 4, located at the bottom center of the groove 3, and is a quadrilateral structure with four arc-shaped vertices; and an ignition tube 5, one end of which is located inside the medicine cup 1, and the other end of which passes through the central hole 4 and is located inside the groove 3, and is fixedly connected to the metal shell 2 by injection molding to form an integral unit. The diameter of the groove 3 gradually narrows from its bottom to its open end. Threads 6 are provided on the inner sidewall of the groove 3.

[0026] The opening end of the medicine cup 1 is provided with an arc-shaped surface tangent to it. The opening end of the medicine cup 1 is folded outward through the arc-shaped surface to form a flange 7. The bottom center of the metal shell 2 is provided with a mating groove 8. The groove 3 is connected to the mating groove 8 through the center hole 4. The bottom edge of the mating groove 8 is provided with a rounded corner 9. The side wall of the mating groove 8 is provided with an annular groove 10 that matches the flange 7. The metal shell 2 is connected to the opening end of the medicine cup 1 through the annular groove 10 and the flange 7. The opening end of the mating groove 8 is connected to the outer side wall of the medicine cup 1.

[0027] A rubber ring 11 is provided inside the annular groove 10. The rubber ring 11 is located on the flange 7. The metal shell 2 is sealed to the open end of the medicine cup 1 through the rubber ring 11.

[0028] It also includes an injection molded body 12. One end of the injection molded body 12 is filled in the area formed by the mating groove 8 and the opening end of the medicine cup 1. The other end of the injection molded body 12 passes through the central hole 4 and matches the groove 3 and extends outward to the outside of the metal shell 2. The end of the injection molded body 12 located outside the metal shell 2 is provided with an installation groove 13. One end of the ignition tube 5 is fixedly connected to the bottom of the medicine cup 1 and the metal shell 2 after being injection molded by the injection molded body 12. The other end of the ignition tube 5 is located in the installation groove 13.

[0029] The bottom outer wall of the mounting groove 13 matches and fits with the side wall of the groove 3 to form an inwardly recessed slot 14. The top outer wall of the mounting groove 13 is connected and fixed to the open end face of the groove 3.

[0030] The ignition tube 5 includes a sleeve 15 and two electrodes 16. One end of the electrode 16 is fixedly connected to the sleeve 15 and is fixedly connected to the bottom of the medicine cup 1 and the metal shell 2 respectively after being injection molded by the injection body 12. The other end of the electrode 16 passes through the central hole 4 and is located in the mounting groove 13. The part of the electrode 16 that passes through the central hole 4 is fixedly connected to the central hole 4 by the injection body 12.

[0031] The micro gas generator involved in this invention addresses the shortcomings of existing technical solutions by assembling the ignition tube 5 and the metal shell 2 through injection molding, eliminating the need for additional machining and welding. Furthermore, the groove 3 on the metal shell 2 is designed as a tapered structure that gradually narrows inwards from its bottom to its opening, and the inner side is provided with threads 6, which improves the overall sealing and strength of the structure. The two electrodes 16 of the ignition tube 5 pass through the injection-molded body 12 via a central hole 4. The central hole 4 is designed as a quadrilateral structure with four arc-shaped vertices, ensuring high strength while also providing anti-rotation characteristics.

[0032] This method is not only low-cost and quick to produce, but also does not affect the performance of the ignition tube 5 and reduces the number of parts. The high-pressure resistant structural design of the injection molded body 12 and the metal shell 2, including anti-rotation features such as the thread 16 and the quadrilateral with four arc vertices, ensures that the injection molded body 12 will not affect the airtightness and strength performance of the generator due to rotation.

[0033] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-pressure resistant, injection-molded integrated micro gas generator, characterized in that, include: Medicine cup (1); The metal shell (2) has its bottom sealed to the opening end of the medicine cup (1) and fixedly connected to the medicine cup (1) by injection molding, and its top is provided with a groove (3). The central hole (4) is located at the bottom center of the groove (3) and is a quadrilateral structure with all four vertices being arc-shaped; The ignition tube (5) has one end located inside the medicine cup (1) and the other end passing through the central hole (4) and located inside the groove (3). It is fixedly connected to the metal shell (2) by injection molding and forms an integral part.

2. The high-pressure resistant injection molding integrated micro gas generator according to claim 1, characterized in that, The diameter of the groove (3) gradually shrinks from its bottom towards its opening end.

3. A high-pressure resistant injection molding integrated micro gas generator according to claim 1 or 2, characterized in that, The inner wall of the groove (3) is provided with threads (6).

4. A high-pressure resistant injection molding integrated micro gas generator according to claim 1 or 2, characterized in that, The opening end of the medicine cup (1) is provided with an arc-shaped surface tangent to it. The opening end of the medicine cup (1) is folded outward through the arc-shaped surface to form a flange (7). The bottom center of the metal shell (2) is provided with a mating groove (8). The groove (3) is connected to the mating groove (8) through the center hole (4). The bottom edge of the mating groove (8) is provided with a rounded corner (9). The side wall of the mating groove (8) is provided with an annular groove (10) that matches the flange (7). The metal shell (2) is connected to the opening end of the medicine cup (1) through the annular groove (10) and the flange (7). The opening end of the mating groove (8) is connected to the outer side wall of the medicine cup (1).

5. A high-pressure resistant injection molding integrated micro gas generator according to claim 4, characterized in that, A rubber ring (11) is provided in the annular groove (10). The rubber ring (11) is located on the flange (7). The metal shell (2) is sealed to the open end of the medicine cup (1) through the rubber ring (11).

6. A high-pressure resistant injection molding integrated micro gas generator according to claim 4, characterized in that, It also includes an injection molded body (12), one end of which is filled in the area formed by the mating groove (8) and the opening end of the medicine cup (1). The other end of the injection molded body (12) passes through the central hole (4) and matches the groove (3) and extends outward to the outside of the metal shell (2). The end of the injection molded body (12) located outside the metal shell (2) is provided with an installation groove (13). One end of the ignition tube (5) is fixedly connected to the bottom of the medicine cup (1) and the metal shell (2) respectively after being injection molded by the injection molded body (12). The other end of the ignition tube (5) is located in the installation groove (13).

7. A high-pressure resistant injection molding integrated micro gas generator according to claim 6, characterized in that, The bottom outer wall of the mounting groove (13) matches and fits with the side wall of the groove (3) to form an inwardly recessed slot (14), and the top outer wall of the mounting groove (13) is connected and fixed to the open end face of the groove (3).

8. A high-pressure resistant injection molding integrated micro gas generator according to claim 6, characterized in that, The ignition tube (5) includes a sleeve (15) and two electrodes (16). One end of the electrode (16) is fixedly connected to the sleeve (15) and is fixedly connected to the bottom of the medicine cup (1) and the metal shell (2) respectively after being injection molded by the injection body (12). The other end of the electrode (16) passes through the central hole (4) and is located in the mounting groove (13). The part of the electrode (16) that passes through the central hole (4) is fixedly connected to the central hole (4) by the injection body (12).

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