Looseness-proof fixing screw assembly

Abstract

The utility model discloses a captive retaining screw assembly which comprises a pressing rivet sleeve, a captive screw penetrates through the pressing rivet sleeve, a check ring integrated with the pressing rivet sleeve is arranged on the inner wall of the pressing rivet sleeve, and internal threads are distributed on the inner wall of the check ring. The captive screw is composed of a polished rod part, a stud part arranged at one end of the polished rod part and a rotating part arranged at the other end of the polished rod part, the stud part is provided with external threads matched with the internal threads, the diameter of the stud part is larger than that of the polished rod part, and the length of the polished rod part is larger than the height of the pressing rivet sleeve. According to the screw assembly, an original rubber ring is designed into a screw and threaded sleeve screwing-in structure, the screw assembly is not affected by high temperature, does not fall off in daily use, and is convenient to maintain and use, complete in overall function and high in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, and more specifically to a non-loose fixing screw assembly. Background Art

[0002] Combination screws used to fix and adjust the heat sink of the power module. In the past, customers' designs embedded rubber rings inside the screw sleeves. Due to the high heat dissipation temperature, the rubber rings aged quickly and could not achieve the original use effect. The overall effect was not good. Based on this, the utility model proposes a non-loose fixing screw assembly. Utility Model Content

[0003] The utility model aims to overcome the above-mentioned deficiencies in the prior art and provide a non-loose fixing screw assembly.

[0004] To solve the above technical problems, the purpose of the utility model is achieved as follows: the utility model involves a captive fixing screw assembly, including a rivet sleeve, a captive screw inserted in the rivet sleeve, a retaining ring integral with the rivet sleeve is provided on the inner wall of the rivet sleeve, an internal thread is arranged on the inner wall of the retaining ring, the captive screw consists of a smooth rod portion, a stud portion arranged at one end of the smooth rod portion, and a rotating portion arranged at the other end of the smooth rod portion, the stud portion has an external thread matching the internal thread, the diameter of the stud portion is larger than the diameter of the smooth rod portion, and the length of the smooth rod portion is larger than the height of the rivet sleeve.

[0005] To sum up, the utility model has the following beneficial effects: the non-loose fixing screw assembly involved in the utility model, by changing the original rubber ring design to a screw and threaded sleeve screw-in structure, is not affected by high temperature, does not fall off during daily use, is easy to maintain and use, has complete overall functions, and is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0007] Figure 2 It is a structural schematic diagram of the utility model from another viewing angle. DETAILED DESCRIPTION

[0008] In order to enable those skilled in the art to better understand the technical solution of the utility model, the preferred implementation scheme of the utility model is described below in conjunction with specific embodiments, but it should be understood that these descriptions are only for further illustrating the features and advantages of the utility model, rather than limiting the patent requirements of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the utility model.

[0009] The utility model is further described below in conjunction with the accompanying drawings and preferred embodiments.

[0010] Example 1

[0011] See also Figure 1 and Figure 2 As shown, a captive fixing screw assembly involved in this embodiment includes a rivet sleeve 10, in which a captive screw 20 is inserted, an inner wall of the rivet sleeve 10 is provided with a retaining ring 11 which is integrated therewith, and an inner wall of the retaining ring 11 is provided with an internal thread, the captive screw 20 is composed of a smooth rod portion 21, a stud portion 22 arranged at one end of the smooth rod portion, and a rotating portion 23 arranged at the other end of the smooth rod portion, the stud portion 22 has an external thread matching the internal thread, the diameter of the stud portion 22 is larger than the diameter of the smooth rod portion 21, and the length of the smooth rod portion 21 is larger than the height of the rivet sleeve 10.

[0012] The non-loose fixing screw assembly involved in the utility model changes the original rubber ring design into a screw and threaded sleeve screw-in structure, is not affected by high temperature, does not fall off during daily use, is easy to maintain and use, has complete overall functions, and is highly practical.

[0013] Unless otherwise specified, in the present invention, the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicating orientation or positional relationship are based on the orientation or positional relationship actually shown, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the orientation or positional relationship in the present invention are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood in combination with the embodiments and according to specific circumstances.

[0014] Unless otherwise clearly specified and limited, in the present invention, the terms "disposed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0015] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A captive fixing screw assembly, comprising a rivet sleeve, in which a captive screw is inserted, characterized in that: The inner wall of the riveting sleeve is provided with a retaining ring which is integrated therewith, and the inner wall of the retaining ring is provided with an internal thread. The captive screw is composed of a smooth rod portion, a stud portion provided at one end of the smooth rod portion, and a rotating portion provided at the other end of the smooth rod portion. The stud portion has an external thread matching the internal thread. The diameter of the stud portion is larger than the diameter of the smooth rod portion, and the length of the smooth rod portion is larger than the height of the riveting sleeve.

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