Metal plug bush for connector and plug-in structure of metal plug bush

Abstract

The utility model discloses a metal plug bush for a connector and a plug-in structure thereof, comprising a plug bush body, one end of the plug bush body is a cable fixing part used for being fixedly connected with a cable, the other end of the plug bush body is a drum spring part, the drum spring part is provided with a plurality of elastic sheets at intervals along the axis direction, and the elastic sheets are connected with the cable fixing part. The elastic piece is of a long-strip-shaped structure, the elastic piece sequentially comprises a front end part, a middle end part and a rear end part in the direction from the insertion end of the drum spring part to the plug bush body, the elastic piece is further provided with at least one set of body part and at least one set of guide part in the direction from the front end part to the rear end part, and the width of the guide part is smaller than that of the body part. According to the structure, the elastic sheet of the drum spring part is designed to have different widths, so that the force used when the contact pin and the plug bush are inserted is reduced, the contact pin and the plug bush can be inserted more conveniently, and meanwhile, the plug bush is not easy to deform.

Description

Technical Field

[0001] The utility model relates to the photovoltaic field, in particular to a metal plug sleeve for a connector and a plug-in structure thereof. Background Art

[0002] Photovoltaic connectors are specialized electrical connection devices designed specifically for solar photovoltaic systems, providing safe, reliable, and efficient power transmission between photovoltaic panels, combiner boxes, inverters, battery storage systems, and other system components. Photovoltaic connectors are designed to connect and disconnect lines easily and quickly without the need for specialized welding or other permanent connection methods.

[0003] Photovoltaic connectors usually include metal sockets and metal pins. The metal pin box and metal socket can be plugged together to achieve electrical conduction. At present, the pin is provided with a drum spring part, which is composed of a number of springs of equal width. The springs are recessed toward the central axis of the drum spring. The pin and the drum spring have an interference fit. Under the action of the drum spring, the pin and the socket are tightly connected to achieve electrical conduction.

[0004] The current drum spring has a problem of large insertion resistance during the actual plugging process. When inserting the pin into the drum spring, a lot of force is required to stretch the drum spring away from the central axis and then fully insert the pin into the socket. Utility Model Content

[0005] The technical problem solved by the utility model is to provide a metal plug sleeve for a connector, which is convenient for inserting a pin into the plug sleeve and is not easily deformed.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a metal socket for a connector, comprising a socket body, one end of the socket body is a cable fixing part for fixing connection with a cable, the other end of the socket body is a drum spring part, the drum spring part is provided with a plurality of spring sheets spaced apart from each other along its axial direction, the spring sheets are long strip structures, the spring sheets include a front end portion, a middle end portion and a rear end portion in sequence from the insertion end of the drum spring portion to the socket body, the spring sheets are also provided with at least one group of body portions and at least one group of guide portions in the direction from the front end portion to the rear end portion, and the width of the guide portion is smaller than the width of the body portion.

[0007] Furthermore, the main body and the guide part are alternately arranged, a first connecting part or a second connecting part is arranged between the main body and the guide part, the width of the first connecting part gradually decreases from the main body to the guide part, and the width of the second connecting part gradually increases from the guide part to the main body.

[0008] Furthermore, the guide parts are grouped into one group, the main body parts are grouped into two groups, and the guide parts are located between the two groups of main body parts.

[0009] Furthermore, the two sets of body parts are respectively a first body part and a second body part, the front end part is the first body part, the rear end part is the second body part, and the guiding part is located between the front end part and the rear end part.

[0010] Furthermore, the two sets of body parts are respectively a first body part and a third body part, the front end part is the first body part, the elastic pieces from the middle end part to the rear end part form the third body part, and the guiding part is arranged between the front end part and the middle end part.

[0011] Furthermore, the elastic pieces are of the same size and shape and are arranged at equal intervals.

[0012] Furthermore, a plurality of elastic pieces are all in a fence structure that is bent and recessed towards the central axis of the drum spring part, and the recessed distance from the elastic pieces to the central axis of the drum spring part gradually increases from the front end part to the middle end part and then gradually decreases from the middle end part to the rear end part.

[0013] Furthermore, the drum spring part is integrally formed with the socket body or the drum spring part is a hollow cylindrical structure fixedly arranged inside the socket body.

[0014] Furthermore, a clamping part is arranged at the socket body near the cable fixing part, the clamping part is integrally formed with the socket body or is a hollow cylindrical structure fixedly arranged inside the socket body, a plurality of clamping platforms are circumferentially arranged on the clamping part, one end of the clamping platform is fixedly connected with the clamping part, and the other end of the clamping platform extends in a direction away from the socket body.

[0015] The present invention also discloses a metal plugging structure for a connector, which includes the above-mentioned metal socket for a connector and also includes a pin body. The front end of the pin body is the initial end of the pin, and the outer diameter of the initial end of the pin is the same as that of one end of the guiding part close to the front end part.

[0016] Furthermore, the outer diameter of the pin is larger than the inner diameter of the guiding part of the drum spring part, and the pin is in interference fit with the drum spring part.

[0017] Furthermore, the connection part from the initial end of the pin to the pin body is an arc-shaped structure.

[0018] The beneficial effect of the present utility model is that in this structure, the elastic pieces of the drum spring part are designed with different widths, thereby reducing the force used when the pin and the socket are plugged, so that the pin and the socket can be plugged more conveniently, and at the same time, the socket is not easily deformed. Description of the Drawings

[0019] Figure 1 It is a schematic diagram of the metal plugging structure of the embodiment of the present application.

[0020] Figure 2Schematic diagram of the drum spring part of the metal plug-in structure according to the second embodiment of the present application.

[0021] Figure 3 Schematic diagram of the socket body structure of the metal plug-in structure according to the embodiment of the present application.

[0022] Figure 4 For Figure 3 Schematic diagram of the A-A cross-section.

[0023] Figure 5 Schematic diagram of the pin structure of the metal plug-in structure according to the embodiment of the present application.

[0024] Figure 6 For Figure 5 Schematic diagram of the B-B cross-section.

[0025] Figure 7 Schematic diagram of the metal plug-in structure according to the first embodiment of the present application.

[0026] Figure 8 Schematic diagram of the metal plug-in structure according to the third embodiment of the present application.

[0027] Figure 9 Schematic diagram of the metal plug-in structure of one of the styles according to the fourth embodiment of the present application.

[0028] Figure 10 Schematic diagram of the metal plug-in structure of one of the styles according to the fourth embodiment of the present application.

[0029] In the figure, the markings are: socket body 1, cable fixing part 2, drum spring part 3, elastic piece 4, front end part 401, middle end part 402, rear end part 403, body part 400, first body part 400a, second body part 400b, guiding part 404, first connecting part 405, second connecting part 406, clamping part 5, clamping platform 6, pin body 7, initial pin end 701. Detailed implementation manners

[0030] In order to make the above objects, features, and advantages of the present utility model more obvious and understandable, the following will make a detailed description of the specific implementation manners of the present utility model in conjunction with the accompanying drawings.

[0031] Such as Figure 1 , Figure 2 , Figure 7 , Figure 8 , Figure 9 And Figure 10As shown in the figure, an embodiment of the present application discloses a metal ferrule for a connector, including a ferrule body 1. One end of the ferrule body 1 is a cable fixing portion 2 for fixedly connecting with a cable, and the other end of the ferrule body 1 is a spring drum portion 3. A plurality of elastic pieces 4 are arranged at intervals along the axial direction of the spring drum portion 3. The elastic pieces 4 are in a strip-like structure. The elastic pieces 4 sequentially include a front end portion 401, a middle end portion 402, and a rear end portion 403 from the insertion end of the spring drum portion 3 to the direction of the ferrule body 1. At least one set of body portions 400 and at least one set of guiding portions 404 are further provided on the elastic pieces 4 from the front end portion 401 to the rear end portion 403. The width of the guiding portion 404 is smaller than the width of the body portion 400.

[0032] Specifically, the body portions 400 and the guiding portions 404 are arranged alternately. A first connecting portion 405 and / or a second connecting portion 406 are arranged between the body portion 400 and the guiding portion 404. The width of the first connecting portion 405 gradually decreases from the body portion 400 to the guiding portion 404, and the width of the second connecting portion 406 gradually increases from the guiding portion 404 to the body portion 400.

[0033] In this structure, since the width of the first connecting portion 405 gradually decreases from the body portion 400 to the guiding portion 404, and the width of the second connecting portion 406 gradually increases from the guiding portion 404 to the body portion, a smooth connection is achieved between the body portion 400 and the guiding portion 404. Thus, it is convenient for the insertion pin to be connected with the ferrule due to the small width of the guiding portion 404, and the connection strength between the body portion 400 and the guiding portion 404 and the connection strength between the guiding portion 404 and the body portion 400 can be ensured, thereby reducing the problem that the spring drum portion 3 is easily deformed.

[0034] Specifically, the spring drum portion 3 and the ferrule body 1 are integrally formed, or the spring drum portion 3 is a hollow cylindrical structure fixedly arranged inside the ferrule body 1.

[0035] Specifically, this ferrule structure is used in synchronization with an insertion pin. The front end of the insertion pin is an initial end 701 of the insertion pin. The outer diameter of the initial end 701 of the insertion pin is the same as the outer diameter of one end of the guiding portion 404 close to the front end portion 401. The outer diameter of the insertion pin is larger than the inner diameter of a partial section of the spring drum portion 3, and the insertion pin is in interference fit with the spring drum portion 3.

[0036] In this embodiment, the elastic pieces 4 are of the same size and shape and are arranged at equal intervals.

[0037] This kind of structural arrangement can make the insertion pin receive uniform tightening force after being inserted into the ferrule, preventing the insertion pin from being skewed and disengaged in the ferrule.

[0038] In this embodiment, the plurality of spring pieces 4 are all in a fence structure that is bent and recessed toward the central axis of the drum spring portion 3. The recessed distance from the spring piece 4 to the central axis of the drum spring portion 3 gradually increases from the front end portion 401 to the middle end portion 402, and then gradually decreases from the middle end portion 402 to the rear end portion 403, that is, the radial distance from the middle end portion 402 of the spring piece 4 to the central axis is the smallest.

[0039] In this embodiment, when the pin body 7 is inserted into the socket body 1, it will pass through the front end 401, the middle end 402 and the rear end 403 of the spring sheet 4 in sequence. Since the radial distance between the middle end 402 of the spring sheet 4 and the central axis is the smallest, the middle end 402 of the spring sheet 4 will be firmly engaged with the pin body 7, thereby ensuring the connection strength between the pin body 7 and the socket body 1.

[0040] When in use, the pin is inserted into the drum spring portion 3 of the metal socket from the front end 401 of the spring sheet 4. Since the front end of the spring sheet 4 is recessed inwards for a small distance, the pin body 7 enters the drum spring portion 3 without resistance until the initial end 701 of the pin contacts the end of the guide portion 404 close to the front end 401. Since the outer diameter of the initial end 701 of the pin is substantially the same as the inner diameter of the end of the guide portion 404 close to the front end 401, which is approximately 2R, as shown in FIG. Figures 3 to 6 As shown, the pin body 7 starts to be in close contact with the drum spring portion 3 of the socket body 1, and the insertion continues. The outer diameter of the pin body 7 is larger than the inner diameter of the drum spring portion 3, and the pin body 7 and the drum spring portion 3 are interference fit. Under the action of the insertion force, the drum spring portion 3 moves away from the central axis. At the same time, the pin body 7 will be subject to resistance from the drum spring portion 3 in the direction of the central axis, resulting in greater force required for insertion. Since the width of the guide portion 404 is small, the spring sheet 4 is more easily opened by the pin body 7, and the required insertion force will become smaller, thereby facilitating the connection between the pin and the socket.

[0041] In the above structure, by providing a guide portion 404 with a smaller width, the spring sheet 4 can be more easily opened by the pin body 7, thereby reducing the force used when the pin and the socket are inserted into each other. At the same time, the width of the spring sheet 4 decreases from the first connecting portion 405, avoiding the problem of easy deformation of the front end of the drum spring caused by the reduction of the width from the front end.

[0042] In this embodiment, the socket body 1 is provided with a clamping portion 5 near the cable fixing portion 2, and the clamping portion 5 is integrally formed with the socket body 1 or is a hollow cylindrical structure fixed inside the socket body 1;

[0043] A plurality of clamping platforms 6 are circumferentially arranged on the clamping portion 5 , one end of each clamping platform 6 is fixedly connected to the clamping portion 5 , and the other end of each clamping platform 6 extends in a direction away from the socket body 1 .

[0044] In this structure, one end of the metal ferrule near the cable fixing part 2 is used to connect with the connector and is fixed by engaging with a plurality of clamping platforms 6 on the clamping part 5. The cable fixing part 2 is connected and fixed to the cable. Therefore, the setting of the clamping part 5 can prevent the ferrule from loosening or falling off from the installation position due to the pulling of the cable.

[0045] The following describes in detail the metal ferrule for the connector provided by the present invention through multiple embodiments.

[0046] Embodiment 1:

[0047] As Figure 7 shown, there is one group of the guiding part 404 and two groups of the body part 400. The guiding part 404 is located between the first body part 400a and the second body part 400b.

[0048] In this embodiment, the front end part 401 is the first body part 400a, and the rear end part 403 is the second body part 400b. The guiding part 404 is located in the middle of the front end part 401 and the rear end part 403.

[0049] In this embodiment, when inserting the pin body 7 into the ferrule body 1, the pin body 7 will pass through the front end part 401, the first connecting part 405, the guiding part 404, the second connecting part 406, and the rear end part 403 in sequence, so that the pin is connected to the ferrule.

[0050] Embodiment 2:

[0051] As Figure 2 shown, there is one group of the guiding part 404 and two groups of the body part 400. The guiding part 404 is located between the first body part 400a and the second body part 400b.

[0052] The difference between this embodiment and Embodiment 1 is that the guiding part 404 is arranged close to the front end part 401, that is, the guiding part 404 is located between the front end part 401 and the middle end part 402. At this time, the front end part 401 is the first body part 400a, and the second body part 400b is the elastic piece between the middle end part 402 and the rear end part 403.

[0053] In this embodiment, when inserting the pin body 7 into the ferrule body 1, the pin body 7 will pass through the front end part 401, the first connecting part 405, the guiding part 404, the second connecting part 406, the middle end part 402, and the rear end part 403 in sequence, so that the pin is connected to the ferrule.

[0054] Embodiment 3:

[0055] As Figure 8 shown, both the guiding part 404 and the body part 400 are one group. At this time, the front end part 401 is the first body part 400a, and the middle end part 402 and the rear end part 403 are the guiding part 404.

[0056] In this embodiment, when the pin body 7 is inserted into the socket body 1, the pin body 7 will sequentially pass through the front end portion 401, the first connecting portion 405, and the guiding portion 404.

[0057] Embodiment 4:

[0058] As Figure 9 、 10 shown, the guiding portion 404 and the body portion 400 are both in multiple groups, and the body portion 400 and the guiding portion 404 are alternately arranged. When the pin body 7 is inserted into the socket body 1, the pin body 7 will start from the front end portion 401 and sequentially pass through the body portion 400, the first connecting portion 405, the guiding portion 404, the second connecting portion 406, the body portion 400... until the rear end portion 403.

[0059] The present invention also discloses a metal plugging structure for a connector, including the metal socket for the connector described above, and further including a pin body 7. The front end of the pin body 7 is the pin initial end 701. The outer diameter of the pin initial end 701 is the same as or close to the diameter of one end of the guiding portion 404 close to the front end portion 401. The outer diameter of the pin is greater than the inner diameter of the guiding portion 404 of the drum spring portion 3, and the pin is in interference fit with the drum spring portion 3.

[0060] In this structure, through the cooperation of the pin body 7 and the socket body 1, the elastic piece 4 can be more easily expanded by the pin body 7, thereby reducing the force used when the pin and the socket are inserted. At the same time, the width of the elastic piece 4 starts to decrease from the first connecting portion 405, avoiding the problem that the front end of the drum spring is easily deformed when the width starts to decrease from the frontmost end.

[0061] In this embodiment, the connection portion between the pin initial end 701 and the pin body 7 is an arc structure.

[0062] Specifically, during the process of inserting the initial end of the pin into the pin body 7, the arc structure can facilitate the insertion of the pin body 7 into the socket body 1, making the insertion of the socket and the pin more convenient.

[0063] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the present utility model. It should be understood that the above are only specific embodiments of the present utility model and are not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A metal ferrule for a connector, comprising a ferrule body (1), one end of the ferrule body (1) being a cable fixing part (2) for fixedly connecting with a cable, and the other end of the ferrule body (1) being a drum spring part (3), characterized in that: A plurality of elastic pieces (4) are arranged at intervals along the axial direction of the drum spring part (3). The elastic pieces (4) are in a strip-shaped structure. The elastic pieces (4) sequentially include a front end part (401), a middle end part (402), and a rear end part (403) along the direction from the insertion end of the drum spring part (3) to the socket body (1). At least one set of body parts (400) and at least one set of guiding parts (404) are further arranged on the elastic piece (4) along the direction from the front end part (401) to the rear end part (403). The width of the guiding part (404) is smaller than the width of the body part (400).

2. The metal ferrule for a connector according to claim 1, characterized in that: The body parts (400) and the guiding parts (404) are arranged alternately. A first connecting part (405) or a second connecting part (406) is arranged between the body part (400) and the guiding part (404). The width of the first connecting part (405) gradually decreases from the body part (400) to the guiding part (404), and the width of the second connecting part (406) gradually increases from the guiding part (404) to the body part (400).

3. The metal ferrule for a connector according to claim 1, wherein: There is one set of guiding parts (404) and two sets of body parts (400). The guiding part (404) is located between the two sets of body parts (400).

4. The metal socket for a connector according to claim 3, characterized in that: The two sets of body parts are respectively a first body part (400a) and a second body part (400b). The front end part (401) is the first body part (400a), the rear end part (403) is the second body part (400b), and the guiding part (404) is located between the front end part (401) and the rear end part (403).

5. The metal socket for a connector according to claim 3, wherein: The two sets of body parts are respectively a first body part (400a) and a second body part (400b). The front end part (401) is the first body part (400a), and the elastic piece from the middle end part (402) to the rear end part (403) forms the second body part (400b). The guiding part (404) is arranged between the front end part (401) and the middle end part (402).

6. The metal socket for a connector according to claim 1, wherein: The elastic pieces (4) have the same size and shape and are arranged at equal intervals.

7. The metal ferrule for a connector according to claim 1, wherein: A plurality of elastic pieces (4) are all in a fence structure that is bent and recessed towards the central axis of the drum spring part (3). The recessed distance from the elastic piece (4) to the central axis of the drum spring part (3) gradually increases from the front end part (401) to the middle end part (402), and then gradually decreases from the middle end part (402) to the rear end part (403).

8. The metal socket for a connector according to claim 1, wherein: The drum spring part (3) is integrally formed with the socket body (1) or the drum spring part (3) is a hollow cylindrical structure fixedly arranged inside the socket body (1).

9. The metal socket for a connector according to claim 1, wherein: A clamping part (5) is arranged at the socket body (1) near the cable fixing part (2). The clamping part (5) is integrally formed with the socket body (1) or is a hollow cylindrical structure fixedly arranged inside the socket body (1). A plurality of clamping platforms (6) are arranged circumferentially on the clamping part (5). One end of the clamping platform (6) is fixedly connected to the clamping part (5), and the other end of the clamping platform (6) extends in a direction away from the socket body (1).

10. A metal plugging structure for a connector, comprising the metal socket for a connector according to any one of claims 1 to 8, characterized in that: It further includes a pin body (7), the front end of the pin body (7) is the pin initial end (701), and the outer diameter of the pin initial end (701) is the same as that of one end of the guiding portion (404) close to the front end portion (401).

11. A metal plug-in structure for a connector according to claim 10, characterized in that: The outer diameter of the pin body (7) is larger than the inner diameter of the guiding portion (404) of the drum spring portion (3), and the pin body (7) is in interference fit with the drum spring portion (3).

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