Pin terminal and terminal material belt

Abstract

The utility model relates to a pin terminal and a terminal material strip, the pin terminal comprises a plugging section, a welding section and a fixing section, and the plugging section is used for plugging with a jack terminal; the welding section is used for welding with a wire; the fixing section is used for penetrating through an insulator, the fixing section is connected between the insertion section and the welding section, the fixing section comprises a limiting section, and the outer diameter of the limiting section is gradually increased in the direction from the insertion section to the welding section along the axis of the pin terminal so as to be in interference fit with the insulator. The outer diameter of the limiting section is gradually increased, and the limiting section can be in interference fit with the insulator, so that the pin terminal has a stable position relative to the insulator. As the overall outer diameter of the limiting section is increased, but not the local area of the limiting section protrudes, the limiting effect is better and more uniform when the limiting section is in interference fit with the insulator, the probability of occurrence of the problem of pin deflection caused by external factors such as vibration is reduced, and the plugging stability is improved. The terminal material belt comprises the pin terminal and can be stably matched with an insulator.

Description

Technical Field

[0001] This application relates to the technical field of electrical connectors, and particularly to a pin terminal and a terminal strip. Background Art

[0002] An electrical connector is an electronic engineering device used to achieve electrical connections between devices, apparatuses, and electrical components. Electrical connectors typically include a male head and a female head that are inserted into each other. The male head and the female head usually have similar constituent elements: a housing, an insulator, and terminals. The insulator is disposed in the housing and the terminals are inserted through the insulator. As one of the key elements for electrical connection, the position stability of the terminals in the insulator will affect the stable insertion connection of the electrical connector. However, there is a situation where the positions of the terminals in current electrical connectors are unstable, which urgently needs to be solved. Summary of the Utility Model

[0003] Based on this, in view of the problem of unstable terminal positions in current electrical connectors, it is necessary to provide a pin terminal and a terminal strip.

[0004] An embodiment of this application provides a pin terminal. The pin terminal includes a mating section, a welding section, and a fixing section. The mating section is used for plugging with a jack terminal; the welding section is used for welding with a wire; the fixing section is used for passing through an insulator. The fixing section is connected between the mating section and the welding section. The fixing section includes a limiting segment. In the direction from the mating section to the welding section along the axis of the pin terminal, the outer diameter of the limiting segment gradually increases for interference fit with the insulator.

[0005] In one of the embodiments, the fixing section further includes a mating segment. The mating segment is connected between the limiting segment and the welding section. The outer diameter of the mating segment is less than or equal to the minimum outer diameter of the limiting segment to form a shoulder between the limiting segment and the mating segment.

[0006] In one of the embodiments, the fixing section further includes a guiding segment. The guiding segment is connected between the mating section and the limiting segment. The outer diameter of the guiding segment is less than or equal to the minimum outer diameter of the limiting segment.

[0007] In one of the embodiments, along the axis direction of the pin terminal, the length of the guiding segment is S1, and the length of the limiting segment is S2, where S1≥2S2.

[0008] In one embodiment, the pin terminal has an initial form and a formed form, and the pin terminal is configured to be wound from the initial form into the formed form by stamping; when the pin terminal is in the initial form, the pin terminal is in a flat plate shape; when the pin terminal is in the formed form, the pin terminal is in a hollow tubular shape.

[0009] In one embodiment, the wall thickness of the terminal at the limiting segment is less than or equal to the wall thickness of the terminal at the guiding segment.

[0010] In one embodiment, a communicating long hole is formed hollow in the pin terminal, a cup mouth is provided at the end of the welding segment, and the cup mouth communicates with the communicating long hole and is configured for the wire to be inserted therein; a forming hole is formed in the welding segment or the fixing segment, a baffle is connected to the hole wall of the forming hole, and the baffle is folded inward to at least partially cut off the communicating long hole.

[0011] In one embodiment, on a cross-section passing through the axis of the pin terminal, the angle between the outer surface of the limiting segment and the axis of the pin terminal is α, where 0.8° ≤ α ≤ 2°.

[0012] In one embodiment, the outer diameter of the fixing segment is greater than the outer diameter of the mating segment, and the pin terminal further includes a transition segment; the transition segment includes a first end and a second end, the first end is connected to the end of the mating segment, and the outer diameter of the first end is the same as the outer diameter of the end of the mating segment, the second end is connected to the end of the fixing segment, and the outer diameter of the second end is the same as the outer diameter of the end of the fixing segment; along the direction of the axis of the pin terminal from the first end to the second end, the outer diameter of the transition segment gradually increases.

[0013] The present application further provides a terminal strip, which includes a strip body and a plurality of pin terminals as described above, and each of the pin terminals is connected to the strip body at intervals.

[0014] In the above-mentioned pin terminal, since the outer diameter of the limiting segment gradually increases, the limiting segment can be in interference fit with the insulator, so that the pin terminal has a stable position relative to the insulator. It should be further noted that since the limiting segment has an overall increasing outer diameter rather than a protruding local area, the interference fit between the limiting segment and the insulator has a better and more uniform limiting effect, reducing the probability of problems such as pin deflection caused by external factors such as vibration, and improving the plugging stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is an axonometric schematic view of the pin terminal provided by an embodiment of the present application.

[0016] Figure 2 isFigure 1 Top view of the pin terminal shown

[0017] Figure 3 is Figure 2 Cross-sectional view of the pin terminal shown along line A-A

[0018] Figure 4 is Figure 3 Partial enlarged view at B of the pin terminal shown

[0019] Figure 5 Top view of the terminal strip provided by an embodiment of the present application

[0020] Reference numerals: 1, terminal strip; 10, pin terminal; 100, mating section; 200, welding section; 210, cup mouth; 300, fixing section; 310, limiting section; 320, mating section; 330, guiding section; 340, shoulder; 350, forming hole; 360, baffle; 400, transition section; 410, first end; 420, second end; 500, communicating long hole; 20, strip body; 21, positioning hole; O, axis Detailed implementation manners

[0021] To make the above objects, features and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application in conjunction with the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below

[0022] In the description of the present application, it should be understood that if there appear such terms as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application

[0023] In addition, if the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0024] In this application, unless otherwise clearly specified and defined, if terms such as "installed", "connected", "joined", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0025] In this application, unless otherwise clearly specified and defined, if there is a description such as a first feature being "on" or "under" a second feature, the meaning can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0026] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation.

[0027] Refer to Figures 1 to 3, an embodiment of the present application provides a pin terminal 10, and the pin terminal 10 can be stably mated with an insulator (not shown in the figure, the same below). The pin terminal 10 includes a mating section 100, a welding section 200, and a fixing section 300. The fixing section 300 is connected between the mating section 100 and the welding section 200. The mating section 100 is used for plugging with a jack terminal (not shown in the figure, the same below), the welding section 200 is used for welding with a wire, and the fixing section 300 is used for passing through the insulator. The fixing section 300 includes a limiting section 310. In the direction of the axis O of the pin terminal 10 pointing from the mating section 100 to the welding section 200, the outer diameter of the limiting section 310 gradually increases for interference fit with the insulator.

[0028] In the above-mentioned pin terminal 10, since the outer diameter of the limiting section 310 gradually increases, the limiting section 310 can be in interference fit with the insulator, so that the pin terminal 10 has a stable position relative to the insulator. It should be further noted that since the limiting section 310 has an overall increase in outer diameter rather than a protrusion in a local area, the limiting effect is better and more uniform when the limiting section 310 is in interference fit with the insulator, reducing the probability of problems such as pin deflection caused by external factors such as vibration and improving the plugging stability.

[0029] Furthermore, the outer diameter of the limiting section 310 gradually increases in the direction of the axis O of the pin terminal 10 pointing from the mating section 100 to the welding section 200, that is, the outer diameter of one end of the limiting section 310 close to the mating section 100 is smaller, and the outer diameter of one section of the welding section 200 of the limiting section 310 is larger. Since the mating section 100 is used for plugging and mating with the jack terminal, and the mating section 100 is usually the part that first penetrates into the insulator, setting the outer diameter of one end of the limiting section 310 close to the mating section 100 to be smaller facilitates guiding other parts of the fixing section 300 to gradually penetrate into the insulator and improves the smoothness of the installation of the pin terminal 10. It can be understood that an installation hole (not shown in the figure, the same below) for the pin terminal 10 to penetrate is provided on the insulator, and the installation hole is usually a regular cylindrical hole. Therefore, when the pin terminal 10 penetrates, the limiting section 310 can be in interference fit with the hole wall of the installation hole. The outer diameter of other regions on the fixing section 300 except the limiting section 310 can be equal to or slightly smaller than the inner diameter of the installation hole.

[0030] Even further, regarding the overall increase in the outer diameter of the above-mentioned limiting section 310, as Figure 2 and Figure 3 shown, after the overall outer diameter of the limiting section 310 increases, the outer shape of the limiting section 310 can be in the shape of a frustum of a cone.

[0031] Please refer to Figure 4, in one embodiment, on a cross-section passing through the axis O of the pin terminal 10, the included angle between the outer surface of the limiting segment 310 and the axis O of the pin terminal 10 is α, where 0.8° ≤ α ≤ 2°. It can be understood that if the included angle α is too small, the position stability of the pin terminal 10 after insertion may still be insufficient; if the included angle α is too large, the installation difficulty will also be great. Therefore, the specific value of the included angle α can be selected within the said angle range according to actual needs. Of course, in other embodiments, other angles of the included angle α can also be selected, which will not be elaborated here.

[0032] Please refer to Figure 2 and Figure 3 , in one embodiment, the fixed segment 300 further includes a mating segment 320 and a guiding segment 330. The mating segment 320 is connected between the limiting segment 310 and the welding segment 200, and the guiding segment 330 is connected between the mating segment 100 and the limiting segment 310. The outer diameter of the mating segment 320 is less than or equal to the minimum outer diameter of the limiting segment 310 to form a shoulder 340 between the limiting segment 310 and the mating segment 320. It can be understood that the mating segment 320 is connected to the end with the largest outer diameter of the limiting segment 310. Therefore, the outer diameter of the mating segment 320 is less than or equal to the minimum outer diameter of the limiting segment 310, causing a sudden change in the radial dimension at the connection between the mating segment 320 and the limiting segment 310 to form a shoulder 340. As a part of the fixed segment 300, the mating segment 320 also passes through the insulator. Therefore, the shoulder 340 will also be in limiting cooperation with the insulator. Compared with using an inclined or curved transition region, forming a shoulder 340 between the mating segment 320 and the limiting segment 310 can have a stronger anti-retreat limiting effect when the shoulder 340 cooperates with the insulator, so as to improve the axial position stability of the jack. As Figure 2 , the outer diameter of the mating segment 320 is shown by reference numeral d1, and the minimum outer diameter of the limiting segment 310 is shown by reference numeral d2.

[0033] Furthermore, the outer diameter of the guiding segment 330 is less than or equal to the minimum outer diameter of the limiting segment 310. The guiding segment 330 is connected to a section of the limiting segment 310 close to the mating segment 100, that is, the guiding segment 330 will penetrate into the insulator prior to the limiting segment 310. Therefore, setting the guiding segment 330 to have a smaller outer diameter can facilitate guiding the limiting segment 310 to penetrate into the insulator. As Figure 2 , the outer diameter of the mating segment 320 is shown by reference numeral d3.

[0034] Please refer to Figure 2, in one embodiment, along the axis O direction of the pin terminal 10, the length of the guiding segment 330 is S1, and the length of the limiting segment 310 is S2, where S1 ≥ 2S2. In short, relative to the limiting segment 310, the guiding segment 330 has a longer dimension. And as a part of the fixing segment 300, the guiding segment 330 is also inserted through the insulator. Since the guiding segment 330 has a longer dimension, its contact area with the insulator is relatively larger, thereby further limiting the axial position of the pin terminal 10.

[0035] Please refer to Figures 1 to 3 , in one embodiment, the minimum outer diameter of the fixing segment 300 is greater than the outer diameter of the mating segment 100. The pin terminal 10 further includes a transition segment 400. The transition segment 400 includes a first end 410 and a second end 420. The first end 410 is connected to the end of the mating segment 100, and the outer diameter of the first end 410 is the same as the outer diameter of the end of the mating segment 100; the second end 420 is connected to the end of the fixing segment 300, and the outer diameter of the second end 420 is the same as the outer diameter of the end of the fixing segment 300. Further, the second end 420 can be connected to the guiding segment 330, and the outer diameter of the second end 420 can be the same as the outer diameter of the guiding segment 330.

[0036] Along the axis O of the pin terminal 10 from the first end 410 to the second end 420, the outer diameter of the transition segment 400 gradually increases to guide the fixing segment 300 into the insulator.

[0037] Such as Figure 2 , along the axis O of the pin terminal 10, the pin terminal 10 successively includes a mating segment 100, a guiding segment 330, a limiting segment 310, a mating segment 320, and a welding segment 200, where the guiding segment 330, the limiting segment 310, and the mating segment 320 are the fixing segment 300.

[0038] The pin terminal 10 can be formed by stamping. For example, in one embodiment, please refer to Figures 1 to 3 , the pin terminal 10 has an initial form and a formed form. The pin terminal 10 is used to be wound from the initial form by stamping to form the formed form. When the pin terminal 10 is in the initial form, the pin terminal 10 is in a flat plate shape. When the pin terminal 10 is in the formed form, the pin terminal 10 is in a hollow tubular shape. That is to say, the pin terminal 10 can be formed by stamping a flat plate-shaped workpiece to form a hollow tubular formed product. The pin terminal 10 is formed by stamping, and the consistency of the overall structure is good. And, it saves more materials compared with turning processing.

[0039] Further, a combination seam (not shown in the figure, the same below) extending along the axis O is provided at one place on the outer periphery of the pin terminal 10. After the flat plate-shaped part is wound, it is butted at the combination seam, so that the pin terminal 10 forms a generally tubular structure.

[0040] Moreover, the specific structure of the pin terminal 10 provided in each embodiment of the present application is convenient for stamping. For example, the guiding segment 330 and the mating segment 320 may have the same outer diameter, and the outer diameter size is equal to the minimum outer diameter of the limiting segment 310. Before stamping, the guiding segment 330, the mating segment 320, and the limiting segment 310 may have the same thickness. By stamping, the limiting segment 310 is turned outwards, so that the limiting segment 310 finally winds into a shape with a gradually increasing outer diameter (such as the frustum shape described above). It can be understood that the thickness of the limiting segment 310 after stamping may remain unchanged or be slightly smaller than the thickness of the guiding segment 330 and the mating segment 320. In other words, for the formed structure of the pin terminal 10, the terminal wall thickness at the limiting segment 310 is less than or equal to the terminal wall thickness at the guiding segment 330. The wall thickness described in this embodiment is the dimension in the direction perpendicular to the outer surface and passing through the axis O. As Figure 3 , the terminal wall thickness at the limiting segment 310 is shown by reference numeral K1, and the terminal wall thickness at the guiding segment 330 is shown by reference numeral K2.

[0041] Please refer to Figure 3 , in one embodiment, the pin terminal 10 is hollow to form a communicating long hole 500. The end of the welding segment 200 is provided with a cup mouth 210, and the cup mouth 210 communicates with the communicating long hole 500 and is used for inserting a wire. After the wire extends into the communicating long hole 500 from the cup mouth 210, it can be welded and fixed to the pin terminal 10 through solder. The welding segment 200 or the fixing segment 300 is provided with a forming hole 350, and a baffle 360 is connected to the hole wall of the forming hole 350. The baffle 360 is folded inwards towards the pin terminal 10 to at least partially cut off the communicating long hole 500. By cutting off the communicating long hole 500 through the baffle 360, the solder (in a molten state) can be blocked. On the one hand, the waste of solder is reduced, and on the other hand, the influence of the solder flowing in the communicating long hole 500 on the electrical connection effect is reduced.

[0042] Furthermore, the baffle 360 can also be formed by stamping, that is, the outer periphery of the welding segment 200 or the fixing segment 300 can be stamped, so that a part of the structure is turned inwards to form the baffle 360, and the remaining shape of the outer periphery of the welding segment 200 or the fixing segment 300 after being stamped forms the above-mentioned forming hole 350.

[0043] Please refer to Figure 5 , the present application also provides a terminal strip 1. The terminal strip 1 includes a strip body 20 and a plurality of pin terminals 10, and each pin terminal 10 is connected to the strip body 20 at intervals. During stamping processing, the flat workpiece can be directly stamped to obtain the terminal strip 1. Since each pin terminal 10 is connected through the strip body 20, continuous local electroplating can be used during surface treatment to reduce the electroplating cost.

[0044] In one embodiment, positioning holes 21 are formed in the belt body 20 for positioning during stamping. To facilitate understanding of the stamping process of the pin terminals 10, a brief description thereof is given below:

[0045] S1. Provide a sheet. The shape and specific dimensions of the sheet can be adaptively selected according to the required pin terminals 10.

[0046] S2. Punch positioning holes 21 in the sheet to facilitate positioning in subsequent processes.

[0047] S3. Punch the shape of one end of the pin terminal 10 when it is unfolded on the sheet. For example, at this time, the shape of the mating section 100 can be punched out, etc.

[0048] S4. Punch the shape of the other end of the pin terminal 10 when it is unfolded on the sheet. For example, at this time, the shape when the limit segment 310 is unfolded, the baffle 360, and the shape when the cup mouth 210 is unfolded can be punched out, etc.

[0049] S5. Stamp and remove the connecting material between adjacent pin terminals 10 on the sheet.

[0050] S6. Round the sheet to form the pin terminals 10.

[0051] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, 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, it should be considered to be within the scope described in this specification.

[0052] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A pin terminal, characterized in that, The pin terminal includes: An insertion section for inserting into a jack terminal; A welding section for welding with a wire; A fixing section for passing through an insulator. The fixing section is connected between the insertion section and the welding section. The fixing section includes a limiting segment. In the direction from the insertion section to the welding section along the axis of the pin terminal, the outer diameter of the limiting segment gradually increases for interference fit with the insulator.

2. The pin terminal according to claim 1, wherein The fixing section further includes a mating segment connected between the limiting segment and the welding section. The outer diameter of the mating segment is less than or equal to the minimum outer diameter of the limiting segment to form a shoulder between the limiting segment and the mating segment.

3. The pin terminal according to claim 1, wherein The fixing section further includes a guiding segment connected between the insertion section and the limiting segment. The outer diameter of the guiding segment is less than or equal to the minimum outer diameter of the limiting segment.

4. The pin terminal according to claim 3, wherein Along the axis direction of the pin terminal, the length of the guiding segment is S1, and the length of the limiting segment is S2, where S1≥2S2.

5. The pin terminal according to claim 3, characterized in that, The pin terminal has an initial form and a formed form. The pin terminal is used to be wound from the initial form to the formed form by stamping. When the pin terminal is in the initial form, the pin terminal is in a flat plate shape. When the pin terminal is in the formed form, the pin terminal is in a hollow tubular shape.

6. The pin terminal according to claim 5, wherein The wall thickness of the terminal at the limiting segment is less than or equal to the wall thickness of the terminal at the guiding segment.

7. The pin terminal according to claim 5, wherein The pin terminal is hollow to form a communicating long hole. A cup mouth is provided at the end of the welding section. The cup mouth communicates with the communicating long hole and is used for inserting the wire. A forming hole is provided in the welding section or the fixing section. A baffle is connected to the hole wall of the forming hole. The baffle is folded inward to at least partially cut off the communicating long hole.

8. The pin terminal according to claim 1, characterized in that, On a cross-section passing through the axis of the pin terminal, the angle between the outer surface of the limiting segment and the axis of the pin terminal is α, where 0.8°≤α≤2°.

9. The pin terminal according to claim 1, wherein The outer diameter of the fixing section is greater than the outer diameter of the insertion section. The pin terminal further includes a transition section. The transition section includes a first end and a second end. The first end is connected to the end of the insertion section, and the outer diameter of the first end is the same as the outer diameter of the end of the insertion section. The second end is connected to the end of the fixing section, and the outer diameter of the second end is the same as the outer diameter of the end of the fixing section. Along the direction from the first end to the second end of the pin terminal axis, the outer diameter of the transition section gradually increases.

10. A terminal strip, characterized in that, The terminal strip includes a strip body and a plurality of pin terminals as described in any one of claims 1 to 9. Each of the pin terminals is spaced and connected to the strip body.

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