Electric connector tail accessory shielding layer fixing structure

Abstract

The utility model discloses a tail accessory shielding layer fixing structure of an electric connector. The tail accessory shielding layer fixing structure comprises a connecting sleeve, a cable sleeve, an opening elastic check ring, a conical end set screw and a shielding layer. The shielding layer passes through the cable sleeve and is turned outwards to the outside of the cable sleeve and covers the annular groove, and the two opening elastic check rings are symmetrically installed in the annular groove to fix the shielding layer on the cable sleeve. The connecting sleeve is in threaded connection with the cable sleeve, and the internal step surface of the connecting sleeve tightly presses the opening elastic check ring during threaded connection, so that the shielding layer is axially fixed. The two cone-end set screws are in threaded connection through the through threaded holes of the connecting sleeve and then respectively press the open elastic check rings, so that radial fixation of the shielding layer is achieved, and meanwhile thread looseness prevention is achieved. According to the electric connector tail accessory shielding layer fixing structure, the opening elastic check ring is matched with the conical end set screw to realize bidirectional pressing and fixing of the shielding layer, displacement of the shielding layer can be effectively avoided, 360-degree pressing lap joint is realized, and the electromagnetic shielding performance of the electric connector is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric connectors, and in particular relates to a shielding layer fixing structure for an electric connector tail accessory. Background Art

[0002] Electrical connectors are important supporting components for aviation, aerospace, military and other system equipment, and are used for the connection and transmission of electrical signals. In order to meet the electrical connection reliability and shielding performance of the electrical connector and ensure normal use in harsh environments, the tail wire harness of the electrical connector is often fixed and protected by tail accessories. When the tail wire harness of the electrical connector has a shielding layer and shielding requirements, a shielding tail accessory is needed to effectively fix the shielding layer, and conduct 360° between the shielding layer and the tail accessory, thereby achieving a 360° shielding effect.

[0003] At present, the common ways to fix the shielding layer of the shielding tail accessories include configuring a conical ring clamp connection, using a ferrule or steel tie to bind the connection, and welding the shielding layer. For the conical ring clamp connection fixing method, the shielding layer is clamped between the two matching surfaces by the cooperation between the conical ring and the conical surface of the tail accessory shell. The installation efficiency is low in actual operation, and the compression force generated by the threaded connection cannot be completely converted into the clamping force on the shielding layer. The fixing reliability is general, and it is easy to fall out in harsh use environments, causing shielding failure; for the use of ferrules or steel ties to bind the connection fixing method, the shielding layer is radially fixed to the tail accessory shell by the ferrule or steel tie through tools, and the radial pressing force is converted into axial friction to prevent the shielding layer from falling out. The shielding layer is easy to slide during installation, and the ferrule or steel tie needs to be destroyed and cannot be reused during maintenance, and the maintainability is poor; for the shielding layer welding fixing method, after the shielding layer is welded to the metal grounding ring, the grounding ring is placed at the bottom of the tail accessory against the electrical connector shell, thereby achieving a reliable connection between the shielding layer and the shell. Although this form of connection has high reliability, it requires external welding tools and has high requirements for welding technology, and its processability and maintainability are average.

[0004] As the requirements for the electromagnetic interference resistance and environmental resistance of electronic equipment have been increasing in recent years, the requirements for the shielding function of the tail accessories have also increased. The conventional method of fixing the shielding layer of the shielding tail accessories can no longer meet the requirements of high shielding performance of electrical connectors. Summary of the invention

[0005] The technical problem to be solved by the utility model is to propose a shielding layer fixing structure for the rear accessory of an electric connector, which can realize the bidirectional reliable fixing of the shielding layer while realizing the anti-loosening effect of the threaded connection of the rear accessory, further increasing the electromagnetic shielding reliability of the rear accessory.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: a shielding layer fixing structure of the rear accessory of an electrical connector, which includes a connecting sleeve, a cable sleeve, an open elastic retaining ring, a cone-end locking screw and a shielding layer. The shielding layer passes through the cable sleeve and is turned outward to the outside of the cable sleeve and covers the annular groove. The two open elastic retaining rings have opposite opening directions when installed, and are installed side by side to fix the shielding layer in the annular groove of the cable sleeve. The connecting sleeve has an internal threaded connecting section that cooperates with the external thread at the rear end of the cable sleeve. When threadedly connected, the internal step surface of the connecting sleeve presses the open elastic retaining ring to achieve axial fixation of the shielding layer. The two cone-end locking screws are threadedly connected to the two through-threaded holes of the connecting sleeve, respectively pressing the two open elastic retaining ring limit grooves to achieve radial fixation of the shielding layer and simultaneously achieve anti-loosening of the threaded connection.

[0007] In one embodiment, the cable sleeve has a through hole inside, an annular groove outside, and an external thread section outside.

[0008] In one embodiment, the inner diameter of the open elastic retaining ring in a natural state is slightly smaller than the bottom diameter of the annular groove of the cable sleeve, and two symmetrically installed open elastic retaining rings can be opened within their elastic deformation range and then installed side by side in the annular groove of the cable sleeve.

[0009] In one of the embodiments, the connecting sleeve is provided with an internal thread which can be engaged and connected with the external thread of the cable sleeve.

[0010] In one of the embodiments, a step surface is provided inside the connecting sleeve, and the diameter of the step surface is smaller than the outer diameter of the open elastic retaining ring. When threadedly connected, the step surface abuts against and presses the end face of the open elastic retaining ring.

[0011] In one of the embodiments, the connecting sleeve is provided with two radially symmetrical through threaded holes, and the cone-end set screw is threadedly connected through the through threaded holes until it is tightened against the open elastic retaining ring, thereby radially pressing and fixing the open elastic retaining ring.

[0012] In one embodiment, the thread diameter of the cone-end set screw is smaller than the thickness of the split circlip.

[0013] In one of the embodiments, the two radially symmetrical through threaded holes differ in position from each other in the axial opening of the connecting sleeve by the thickness of an open elastic retaining ring.

[0014] In one of the embodiments, the open elastic retaining ring is provided with a limiting groove, and the cone-end set screw is pressed against the limiting groove of the open elastic retaining ring to achieve anti-rotation limiting, thereby preventing the open elastic retaining ring from rotating under a vibration environment. Beneficial Effects

[0015] The beneficial results achieved by the utility model are as follows: the utility model provides a shielding layer fixing structure for the tail attachment of an electric connector, which realizes the axial and radial 360° annular overlap and compression fixing of the shielding layer, and the shielding layer is firmly, stably and evenly stressed, which can effectively prevent the displacement of the shielding layer and ensure the electromagnetic shielding performance of the electric connector. Without the need to take additional anti-loosening auxiliary measures, the shielding layer can be fixed in both directions and the tail attachment thread connection can be prevented from loosening, further improving the electromagnetic shielding performance and environmental resistance of the tail attachment, and ensuring the reliability of electrical connection in harsh environments such as vibration and impact.

[0016] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more obvious, the following preferred embodiments are specifically cited and described in detail with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic cross-sectional structure diagram of the shielding layer fixing structure of the rear attachment of the electric connector of the utility model;

[0018] Figure 2 It is a schematic diagram of an implementation state of the shielding layer fixing structure of the rear attachment of the electric connector of the utility model;

[0019] Figure 3 It is a partial enlarged schematic diagram of the fixing structure of the shielding layer of the rear attachment of the electric connector of the utility model;

[0020] Figure 4 is a structural schematic diagram of a connecting sleeve;

[0021] Figure 5 It is a structural schematic diagram of an open elastic retaining ring;

[0022] Figure 6 It is a structural schematic diagram of a cable sleeve;

[0023] Explanation of the reference numerals: 1. Connecting sleeve; 2. Cone-end set screw; 3. Open elastic retaining ring; 4. Cable sleeve; 5. Connecting nut; 6. Clamp; 7. Locking screw; 8. Wire clamp; 9. Shielding layer; 10. Wiring harness; 11. Step surface of connecting sleeve; 12. Through threaded hole; 13. Internal threaded section of connecting sleeve; 20. Elastic rubber pad; 31. Limiting groove; 32. End face of open elastic retaining ring; 33. Process through hole; 41. Annular groove; 42. Side wall of annular groove; 43. External threaded section of cable sleeve; 44. Through hole at the tail of cable sleeve. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the utility model more understandable, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0025] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0026] An embodiment of a tail attachment shielding layer fixing structure: Figures 1 to 6 As shown, it includes a connecting sleeve 1, a cone-end set screw 2, an open elastic circlip 3, a cable sleeve 4, a connecting nut 5, a clamping ring 6, a locking screw 7, a clamping plate 8, a shielding layer 9 and a wiring harness 10. The shielding layer 9 has a certain elastic deformation ability, passes through the inner through hole of the cable sleeve 4, turns outward to the outside of the cable sleeve 4, and covers and extends to the starting position of the outer thread section 43 of the cable sleeve. Two open elastic circlips 3 are symmetrically installed in the sleeve cable annular groove 41 to press the shielding layer 9 on the cable sleeve 4. The connecting sleeve inner thread section 13 is threadedly connected with the cable sleeve outer thread section 43. When the threaded connection is made, the connecting sleeve step surface 11 presses the end surface 32 of the open elastic circlip, and the open elastic circlip 3 further presses the shielding layer 9 on the side wall surface 42 of the cable sleeve annular groove to achieve axial fixation of the shielding layer 9. The two tapered-end set screws 2 respectively press against the arc surfaces of the limiting grooves 31 of the two open elastic retaining rings 3 through the two through threaded holes 12 on the connecting sleeve 1, thereby preventing the open elastic retaining ring 3 from rotating while applying radial pressing force to the shielding layer 9, thereby achieving a double radial fixing effect on the shielding layer 9 and preventing the threaded connection from loosening. An internal thread is provided inside the connecting nut 5, and the connecting nut 5 is butted with the external thread of the electrical connector through the internal thread. The connecting sleeve 1 is rotatably connected with the connecting nut 5 through the clamping ring 6, and then the internal thread of the connecting nut 5 is butted with the external thread of the electrical connector housing.

[0027] Furthermore, the inner diameter of the open elastic retaining ring 3 in a natural state is smaller than the bottom diameter of the annular groove 41 of the cable sleeve. Furthermore, the two open elastic retaining rings can be opened within their elastic deformation range and installed side by side in the annular groove 41 of the cable sleeve. When the two open elastic retaining rings are installed, the opening directions are opposite, and the shielding layer 9 is radially pressed in the annular groove 41 of the cable sleeve to achieve a 360° circumferential overlap.

[0028] Furthermore, two process through holes 33 are provided at both ends of the open elastic retaining ring 3 for clamping loading and unloading tools.

[0029] Furthermore, the open elastic retaining ring 3 is provided with a limiting groove 31, the bottom of the limiting groove 31 is an arc-shaped surface, and when the two tapered end fixing screws 2 are tightened, the flat ends of the screws are against the corresponding arc-shaped surfaces of the open elastic retaining ring limiting grooves 31, and the tapered end fixing screws 2 are stuck in the open elastic retaining ring limiting grooves 31 to prevent the open elastic retaining ring 3 from rotating in a vibration environment, while realizing the function of preventing the threaded connection between the connecting sleeve 1 and the cable sleeve 4 from loosening.

[0030] Furthermore, the two through threaded holes 12 on the connecting sleeve 1 are used for tightening and fixing the two cone-end set screws 2 , which are 180° apart in the circumferential direction, and the distance between the center axes of the two through threaded holes 12 is the thickness value of an open elastic retaining ring 3 .

[0031] Furthermore, two clamping plates 8 are installed at the rear of the cable sleeve 4. The two clamping plates 8 clamp the wire harness 10 through two locking screws 7 to provide a certain tensile strength for the wire harness.

[0032] Furthermore, in order to protect the wire harness 10 , an elastic rubber pad 20 may be filled between the clamping plate 8 and the wire harness 10 .

[0033] Furthermore, the connecting sleeve 1 is rotationally connected to the connecting nut 5 via the clamping ring 6 .

[0034] Furthermore, the interior of the connecting nut 5 is provided with an internal thread that is connected to the external thread of the electrical connector housing.

[0035] In summary, the utility model discloses a fixing structure for the shielding layer of the tail accessory of an electric connector, including a connecting sleeve, a cable sleeve, an open elastic retaining ring, a cone-end set screw and a shielding layer, which realizes radial and axial 360° annular overlap compression and fixation of the shielding layer, and the shielding layer is firmly, stably and evenly stressed, which can effectively prevent the displacement of the shielding layer and ensure the electromagnetic shielding performance of the electrical connector. Without the need to take additional anti-loosening auxiliary measures, the bidirectional fixing of the shielding layer and the anti-loosening effect of the threaded connection of the tail accessory can be achieved at the same time, further improving the electromagnetic shielding performance and environmental resistance of the tail accessory, and ensuring the reliability of electrical connection in harsh environments such as vibration and impact.

[0036] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0037] The above-mentioned embodiment only expresses one implementation method of the utility model, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A shielding layer fixing structure for the tail attachment of an electrical connector, comprising a connecting sleeve, a cable sleeve, an open elastic retaining ring, a cone-end set screw and a shielding layer, characterized in that The shielding layer passes through the cable sleeve and turns outward to the outside of the cable sleeve and covers the annular groove. The two open elastic retaining rings are installed with opposite opening directions and are installed side by side in the annular groove to fix the shielding layer on the cable sleeve. The connecting sleeve has an internal threaded connecting section that cooperates with the external thread at the rear end of the cable sleeve. When the threaded connection is made, the internal step surface of the connecting sleeve presses the open elastic retaining ring to achieve axial fixation of the shielding layer. Two cone-end set screws are inserted through two threaded holes in the connecting sleeve to respectively press the two open elastic retaining rings to achieve radial fixation of the shielding layer and prevent the threaded connection from loosening.

2. The shielding layer fixing structure of the rear attachment of the electric connector according to claim 1, characterized in that: The cable sleeve has a through hole inside, an annular groove outside and an external thread section at the tail.

3. The shielding layer fixing structure of the rear attachment of the electric connector according to claim 1, characterized in that: The inner diameter of the open elastic retaining ring in the natural state is slightly smaller than the groove bottom diameter of the cable sleeve annular groove. Two symmetrically installed open elastic retaining rings can be opened within their elastic deformation range and then sleeved side by side in the cable sleeve annular groove.

4. The shielding layer fixing structure of the rear attachment of the electric connector according to claim 1, characterized in that: An internal thread is arranged inside the connecting sleeve, which can be engaged and connected with the external thread of the cable sleeve.

5. The shielding layer fixing structure of the rear attachment of the electric connector according to claim 1, characterized in that: A step surface is provided inside the connecting sleeve, and the diameter of the step surface is smaller than the outer diameter of the open elastic retaining ring. When threaded connection is performed, the step surface can resist and press the end face of the open elastic retaining ring.

6. The shielding layer fixing structure of the rear attachment of the electric connector according to claim 1, characterized in that: The connecting sleeve is provided with two radially symmetrical through threaded holes.

7. The shielding layer fixing structure of the rear attachment of the electric connector according to claim 1, characterized in that: The cone-end set screw is screwed through the through threaded hole on the connecting sleeve to be connected and abut against the open elastic retaining ring, and the shielding layer is radially compressed and fixed by pressing the open elastic retaining ring.

8. The shielding layer fixing structure of the rear attachment of the electric connector according to claim 1, characterized in that: The diameter of the cone-point set screw is smaller than the thickness of the split circlip.

9. The shielding layer fixing structure of the rear attachment of the electric connector according to claim 1, characterized in that: The difference between the two radially symmetrical through threaded holes and the axial opening positions of the connecting sleeve is the thickness of an open elastic retaining ring.

10. The shielding layer fixing structure of the rear attachment of the electric connector according to claim 1, characterized in that: The open elastic retaining ring is provided with a limiting groove, and the cone-end set screw is pressed against the limit groove of the open elastic retaining ring to achieve anti-rotation limiting, thereby preventing the open elastic retaining ring from rotating under a vibration environment.

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