Outer joint structure of grinding wheel lighter

Abstract

The utility model relates to an outer joint structure of a grinding wheel lighter, which comprises an outer joint support, a hollow pipe fitting for accommodating a spring and a flintstone is arranged on the lower portion of the outer joint support, a grinding wheel is mounted on the upper portion of the outer joint support, the inside of the hollow pipe fitting is formed by vertically connecting an accommodating cavity and an expandable cavity, and the accommodating cavity is a cylindrical cavity for accommodating the spring and the flintstone. The expandable cavity is a circular truncated cone-shaped or inverted-T-shaped cavity with a small upper end and a large lower end; the diameter of the upper end face of the expandable cavity is smaller than that of the containing cavity, a step face is arranged at the joint of the containing cavity and the expandable cavity, and the step face abuts against the spring located in the containing cavity. At least two gaps which are evenly distributed in the axial direction are formed in the pipe wall of the lower portion of the hollow pipe fitting, the length of the gaps is larger than the height of the expandable cavity, when the hollow pipe fitting is stressed, the pipe wall can be expanded outwards along the gaps, and the flintstone and the spring are allowed to be contained in the containing cavity from the expandable cavity. The flintstone and spring assembling machine can effectively simplify the assembling operation of the flintstone and the spring, and improves the automatic production efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of grinding wheel lighters, specifically relating to an external connector structure for a grinding wheel lighter. Background Technology

[0002] The external connector of the flint lighter includes an external connector bracket. The lower part of the bracket has a hollow tube containing a spring and a flint. A grinding wheel is mounted on the upper part of the bracket, and the grinding wheel contacts the flint located below it. The flammable gas released inside the lighter is ignited by the spark generated by the friction between the sliding grinding wheel and the flint. Because the spring must push against the flint to ensure contact with the grinding wheel, there is a mutual constraint between the grinding wheel, flint, and spring during assembly.

[0003] In the existing technology, there are two types of hollow tube structures used for assembling springs and flints: one is a hollow tube structure with a closed lower end, and the other is a hollow tube structure with an open lower end and a sealing component. When using the first type of tube structure, the assembly steps are as follows: (1) install the spring and flint into the hollow tube in sequence; (2) then install the grinding wheel onto the outer connector bracket. During the installation process, the flint needs to be continuously pressed with a tool until the grinding wheel is assembled above the outer connector bracket to solve the pressing problem. This type of grinding wheel lighter outer connector is inconvenient to operate during assembly, and automated flip-plate assembly cannot be achieved, which is not conducive to rapid assembly and has low production efficiency. When using the second type of tube structure, the assembly steps are as follows: (1) first install the grinding wheel onto the outer connector bracket; (2) flip the outer connector bracket so that the hollow tube faces upward, install the flint, spring, and sealing component in sequence, and fix the sealing component to the tube wall of the hollow tube. This type of flint lighter connector eliminates the need for tools to press the flint during assembly, reducing assembly difficulty. However, the added sealing component hinders the rapid assembly of the flint lighter connector. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides an external connector structure for a flint lighter, which improves the hollow tube that houses the flint and spring, effectively simplifying the assembly process of the flint and spring and improving automated production efficiency.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: an external connector structure for a flint lighter, comprising an external connector bracket, a hollow tube at the lower part of the external connector bracket for accommodating a spring and a flint, and an upper part of the external connector bracket for mounting a grinding wheel, the grinding wheel abutting against the flint located below it. The hollow tube is characterized in that both ends are open and the interior is composed of a accommodating cavity and an expandable cavity connected vertically. The accommodating cavity is a cylindrical cavity for accommodating the spring and the flint, and the expandable cavity is a frustum-shaped or convex cavity with a smaller upper end and a larger lower end. The upper surface of the expandable cavity is smaller than the diameter of the accommodating cavity, and the junction of the accommodating cavity and the expandable cavity has a stepped surface, which abuts against the spring located within the accommodating cavity.

[0006] The hollow tube has at least two axially evenly distributed slits on its lower wall. The length of the slits is greater than the height of the expandable cavity. When the hollow tube is subjected to force, the tube wall can be pushed outward along the slits, allowing the flint and spring to be inserted into the receiving cavity from the expandable cavity.

[0007] The convex-shaped cavity is formed by connecting two cylindrical cavities of different diameters vertically, or by connecting one cylindrical cavity and one frustum-shaped cavity vertically.

[0008] The assembly steps of the external connector for this utility model of a grinding wheel lighter are as follows: 1. First, install the grinding wheel onto the external connector bracket; 2. Spread the lower part of the hollow tube outward along the gap, so that the expandable cavity expands outward. Insert the flint and spring into the receiving cavity from the expandable cavity at the lower end of the hollow tube. Then, remove the expansion force on the hollow tube, and the expandable cavity retracts to the unforced state. The stepped surface at the junction of the expandable cavity and the receiving cavity holds the spring in place.

[0009] The beneficial effects of this utility model are as follows:

[0010] This invention improves the hollow tube fitting for accommodating a flint and spring. The hollow tube fitting consists of a receiving cavity and an expandable cavity connected vertically. When assembling the flint and spring, only an external force needs to be applied to expand the expandable cavity outward. The flint and spring can then be inserted from the expandable cavity at the lower end of the hollow tube fitting into the receiving cavity. After assembly, the expansion force is removed, and the expandable cavity retracts to an unstressed state. The stepped surface at the junction of the expandable cavity and the receiving cavity holds the spring in place. No additional sealing components are needed, simplifying the assembly process. The assembly process can be completed automatically and continuously, improving production efficiency. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0012] Figure 2 This is a schematic diagram of the planar structure of this utility model;

[0013] Explanation of reference numerals in the attached drawings: 1. External connector bracket; 11. Hollow pipe fitting; 2. Grinding wheel;

[0014] A. Receptive cavity; B. Expandable cavity; C. Stepped surface; D. Gap. Detailed Implementation

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. In order to facilitate the explanation of the product structure, the specification uses terms indicating location, such as "upper," "lower," and "lower part." The above-mentioned terms of location are, firstly, to facilitate the explanation of the relative positions between the components involved in the external connector of the flint lighter, and secondly, to indicate the position of the components involved in the present invention when the flint lighter is used for ignition.

[0016] like Figure 1 , Figure 2 As shown, this utility model provides an external connector structure for a flint lighter, including an external connector bracket 1. The lower part of the external connector bracket 1 is provided with a hollow tube 11 for accommodating a spring and a flint. A grinding wheel 2 is installed on the upper part of the external connector bracket 1, and the grinding wheel 2 abuts against the flint located below it. The hollow tube 11 is characterized in that both ends are open and the interior is composed of a accommodating cavity A and an expandable cavity B connected vertically. The accommodating cavity A is a cylindrical cavity for accommodating the spring and the flint, and the expandable cavity B is a frustum-shaped or convex cavity with a smaller upper end and a larger lower end. The upper end face of the expandable cavity B is smaller than the diameter of the accommodating cavity A. The junction of the accommodating cavity A and the expandable cavity B has a stepped surface C, and the stepped surface C abuts against the spring located in the accommodating cavity A.

[0017] The hollow tube 11 has at least two axially evenly distributed slits D on its lower tube wall. The length of the slits D is greater than the height of the expandable cavity B. That is, the slits D extend from bottom to top through the tube wall corresponding to the expandable cavity B and then to the part of the tube wall corresponding to the receiving cavity A. When the hollow tube 11 is subjected to force, the tube wall can be expanded outward along the slits D, allowing the flint and spring to be inserted from the expandable cavity B into the receiving cavity A.

[0018] like Figure 2 As shown, the expandable cavity B is a convex-shaped cavity, which is composed of a cylindrical cavity and a frustum-shaped cavity connected vertically.

[0019] As an alternative, the convex cavity can also be formed by connecting two cylindrical cavities of different diameters one above the other.

[0020] The assembly steps of this utility model's external connector for a grinding wheel lighter are as follows: 1. First, install the grinding wheel 2 onto the external connector bracket 1; 2. Spread the lower part of the hollow tube 1 outward along the gap C, allowing the expandable cavity B to expand outward. Insert the flint and spring into the receiving cavity A through the expandable cavity B at the lower end of the hollow tube 1. Then, release the expansion force on the hollow tube 1, and the expandable cavity B retracts to an unforced state. The stepped surface D at the junction of the expandable cavity and the receiving cavity holds the spring in place, eliminating the need for additional sealing components. This utility model simplifies the assembly process, allowing for automated and continuous assembly, thus improving production efficiency.

Claims

1. A structure of an external joint of a grinding wheel lighter, comprising an external joint support, a hollow pipe member for accommodating a spring and a flint is provided at a lower portion of the external joint support, and a grinding wheel is installed at an upper portion of the external joint support, the grinding wheel being in contact with the flint located at a lower portion thereof, characterized in that, The hollow tube is open at both ends and consists of a accommodating cavity and an expandable cavity connected vertically. The accommodating cavity is a cylindrical cavity that accommodates a spring and a flint, and the expandable cavity is a frustum-shaped or convex cavity with a smaller upper end and a larger lower end. The upper surface of the expandable cavity is smaller than the diameter of the accommodating cavity, and there is a stepped surface at the junction of the accommodating cavity and the expandable cavity. The stepped surface abuts against the spring located in the accommodating cavity. The lower part of the hollow tube has at least two axially evenly distributed slits on its tube wall. The length of the slits is greater than the height of the expandable cavity. When the hollow tube is under force, the tube wall can be expanded outward along the slits, allowing the flint and spring to be inserted from the expandable cavity into the accommodating cavity.

2. The grinding wheel lighter outer joint structure according to claim 1, characterized in that, The convex-shaped cavity is formed by connecting two cylindrical cavities of different diameters vertically, or by connecting one cylindrical cavity and one frustum-shaped cavity vertically.

Images