Electrical contact assembly and socket terminal

Abstract

The present invention discloses an electrical contact assembly and a socket terminal, wherein the electrical contact assembly comprises an inner sleeve and a spring sleeve, wherein a notch groove is provided on the side surface of the inner sleeve, and the notch groove passes through both ends of the inner sleeve in the axial direction. The spring sleeve has a port communicating with the interior thereof, and the spring sleeve is sleeved onto the inner sleeve from the notch groove of the inner sleeve through the port. The electrical contact assembly of the present invention can solve the technical problem that the structure and processing technology of some existing elastic contact pieces are relatively complicated.

Description

Technical Field

[0001] The invention relates to the technical field of electric connectors, and in particular to an electric contact assembly and a socket terminal. Background Art

[0002] In the field of electrical connectors, the socket generally uses elastic electrical contacts to elastically contact the pins to ensure the reliability of the electrical connection between the pins and the sockets and to facilitate plugging and unplugging. The quality of the elastic electrical contact structure directly determines the current carrying capacity and safety of the electrical contact system. However, some existing elastic contacts are limited by process or structure reasons and cannot maximize the number of electrical contact pairs, minimize contact resistance, and maximize the mechanical cycle plug-in life. Summary of the invention

[0003] The main purpose of the present invention is to provide an electrical contact component structure and a manufacturing process, aiming to improve the electrical performance and mechanical performance of the electrical contact component and simplify the manufacturing process.

[0004] To achieve the above object, the electrical contact assembly proposed in the present invention comprises an inner sleeve and a spring sleeve, wherein a notch groove is provided on the side surface of the inner sleeve, and the notch groove passes through both ends of the inner sleeve in the axial direction. The spring sleeve has a port communicating with the interior thereof, and the spring sleeve is sleeved onto the inner sleeve from the notch groove of the inner sleeve through the port.

[0005] In one embodiment, the spring sleeve is formed by a spiral spring wire; the cross-section of the spiral spring wire is any one of circular, square or semicircular; or, the spring sleeve is formed by nesting a plurality of the spiral spring wires.

[0006] In one embodiment, the spring sleeve is formed with a spring inner ring located inside the inner sleeve and a spring outer ring located outside the inner sleeve, and the spring inner ring is a single-leaf hyperboloid structure.

[0007] In one embodiment, the spring sleeve is a coil spring having a plurality of contact segments, the plurality of contact segments are inclined relative to the central axis of the inner sleeve, and the spring inner ring is formed by the plurality of contact segments.

[0008] In one embodiment, the plurality of contact segments on the inner ring of the spring are densely arranged in a circumference.

[0009] In one embodiment, in the circumferential direction of the inner sleeve, the free ends of the spring sleeves are elastically abutted against each other, or are welded end to end, or have gaps.

[0010] In one embodiment, the spring sleeve further has a plurality of clamping segments, the plurality of clamping segments are inclined relative to the central axis of the inner sleeve, and the spring outer ring is formed by the plurality of clamping segments.

[0011] The present invention further provides a socket terminal, the socket terminal comprising a housing and an electrical contact assembly, the electrical contact assembly being installed in the housing, and the electrical contact assembly comprising:

[0012] An inner sleeve, a side surface of which is provided with a notch groove, the notch groove passes through both ends of the inner sleeve in the axial direction; and

[0013] The spring sleeve is in a columnar structure and has a port communicated with the interior thereof. The spring sleeve is sleeved onto the inner sleeve from the notch groove of the inner sleeve through the port.

[0014] In one embodiment, the shell is provided with a mounting groove, and the electrical contact assembly is interference fit with the inner wall of the mounting groove; or, the socket terminal also includes a limiter, and the limiter is provided at the notch of the mounting groove and is used to limit the electrical contact assembly in the mounting groove; or, the electrical contact assembly is further covered with an outer sleeve, and the outer sleeve is installed in the mounting groove together with the electrical contact assembly.

[0015] In one embodiment, a plurality of the electrical contact components are disposed in the socket terminal, and the plurality of electrical contact components are arranged along the same central axis.

[0016] The electric contact assembly of the present invention is composed of an inner sleeve and a spring sleeve. When manufacturing the electric contact assembly of the present invention, it is only necessary to put the spring sleeve onto the inner sleeve from the notch of the inner sleeve through its port and wind the spring sleeve along the inner sleeve. The electric contact assembly of the present invention has a simple process, reliable contact performance, and is conducive to mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of an embodiment of an electrical contact assembly of the present invention;

[0019] Figure 2 for Figure 1 A cross-sectional view of the structure of the electrical contact assembly;

[0020] Figure 3 It is a structural schematic diagram of an embodiment of a spring sleeve in an electrical contact assembly of the present invention;

[0021] Figure 4 for Figure 3Structural sectional view of the middle spring sleeve;

[0022] Figure 5 for Figure 3 A schematic structural diagram of an embodiment when the middle spring sleeve is unfolded;

[0023] Figure 6 for Figure 5 The front view and left view of the middle spring sleeve;

[0024] Figure 7 It is a structural schematic diagram of an embodiment of an inner sleeve in an electrical contact assembly of the present invention;

[0025] Figure 8 It is a structural schematic diagram of an embodiment of a jack terminal of the present invention;

[0026] Fig. 9 A structural cross-sectional view of an embodiment of a jack terminal of the present invention;

[0027] Fig.10 A structural cross-sectional view of another embodiment of the jack terminal of the present invention;

[0028] Fig.11 A structural cross-sectional view of another embodiment of the jack terminal of the present invention;

[0029] Fig.12 A structural cross-sectional view of another embodiment of the jack terminal of the present invention;

[0030] Fig.13 It is a structural cross-sectional view of another embodiment of the jack terminal of the present invention.

[0031] Description of Figure Numbers:

[0032] Label name Label name Label name 10 Electrical contact components 32 Clamping section 40 Socket terminal 20 Inner sleeve 33 Spring inner ring 41 case 21 Notch 34 Spring outer ring 42 Mounting slot 30 Spring Set 35 Free end 43 Limiting parts 31 Contact segment 36 Spring wire 50 Outer sleeve 37 port

[0033] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0034] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0035] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0036] The electrical contact assembly 10 is mainly used in the socket terminal of an electrical connector. An electrical connector generally includes a pin terminal and a socket terminal. The pin terminal is inserted into the socket terminal to achieve electrical connection, thereby being able to transmit electrical signals. In some existing electrical connectors, the pin terminal is usually not in hard contact with the inner hole of the socket terminal, but an elastic contact piece is installed in the inner hole of the socket terminal. The elastic contact piece is generally a conductive metal or alloy. The elastic contact piece allows the pin terminal and the socket terminal to make elastic contact, thereby ensuring the stability and durability of the electrical connection between the two.

[0037] However, the structures and processing techniques of some existing elastic contact members are relatively complicated, which leads to great difficulty in production. Therefore, in order to solve the above technical problems, the present invention proposes an electrical contact assembly 10.

[0038] In the embodiment of the present invention, Figures 1 to 7 As shown, it includes an inner sleeve 20 and a spring sleeve 30 . A notch groove 21 is provided on the side surface of the inner sleeve 20 . The notch groove 21 passes through both ends of the inner sleeve in the axial direction and passes from the inner hole of the inner sleeve 20 to the outer periphery of the inner sleeve 20 .

[0039] Among them, Figure 7 As shown, the outer diameter, height, and wall thickness of the inner sleeve 20 are not specifically limited here, and can be set according to actual needs. The size and shape of the notch groove 21 are also not specifically limited here. For example, the notch groove 21 can extend along the axial direction of the inner sleeve 20, or can be inclined at a certain angle relative to the axial direction of the inner sleeve 20. It only needs to be able to extend into the spring sleeve 30 and allow the spring sleeve 30 to be nested on the inner sleeve 20 along the wall of the inner sleeve 20.

[0040] The spring sleeve is in a columnar structure and has a port communicated with the interior thereof. The spring sleeve is sleeved onto the inner sleeve from the notch groove of the inner sleeve through the port.

[0041] In order to prevent the spring sleeve 30 from popping out after being sleeved on the inner sleeve 20, the extension direction of the notch groove 21 can be inclined or even opposite to the spiral direction of the threaded spring, or the notch groove 21 can be pinched, blocked or connected (referring to connecting the two walls of the notch groove 21) after the spring sleeve 30 is sleeved on the inner sleeve 20, etc. The specific settings can be made according to actual conditions.

[0042] In addition, there are many ways to form the inner sleeve 20 with the notch groove 21. For example, the notch groove 21 can be processed on a sleeve with a complete annular structure, or the plate can be wound into a C-shaped annular structure, or it can be directly injection molded through a mold, etc.

[0043] In this embodiment, if Figure 5 As shown, the spring sleeve 30 has a port 37 communicated with the interior thereof, and the spring sleeve 30 is sleeved onto the inner sleeve 20 from the notch groove 21 of the inner sleeve 20 through the port 37 .

[0044] It should be noted that, reference Figures 5 and 6 The spring sleeve 30 is produced in a long tube-shaped structure, for example, formed by a spiral spring wire 36. After the spring sleeve 30 is nested on the sleeve according to the installation process in this solution, it extends along the circumferential direction of the inner sleeve due to elastic deformation, forming a Figure 1 The columnar structure shown.

[0045] The spring sleeve 30 is mainly used to pass through the notch groove 21 on the inner sleeve 20, and is wound along the inner sleeve 20 and nested on the inner sleeve 20. Of course, it can also be said that the inner sleeve 20 is nested into the inner part of the spring sleeve 30 through its notch groove 21. Therefore, the size and shape of the spiral ring of the spring sleeve 30 can be adapted according to the height and wall thickness of the inner sleeve 20. For example, in one embodiment, Figure 6 As shown, when the spring sleeve 30 is produced, its spiral ring is in a square ring shape, the long side of the square ring corresponds to the height design of the inner sleeve 20, and the short side corresponds to the wall thickness design of the inner sleeve 20, so that the spring sleeve 30 can be smoothly nested in the inner sleeve 20, and the production materials of the spring sleeve 30 can be saved, thereby reducing the production cost.

[0046] Of course, when the spring sleeve 30 is produced, its spiral ring may also be in a racetrack shape, etc., which may be specifically set according to actual conditions.

[0047] The electrical contact assembly of the present invention is composed of an inner sleeve and a spring sleeve. When manufacturing the electrical contact assembly of the present invention, it is only necessary to put the spring sleeve onto the inner sleeve from the notch groove of the inner sleeve through its port and wind the spring sleeve along the sleeve. After the pin terminal is inserted, it contacts the part of the spring sleeve located in the inner sleeve, thereby realizing the transmission of electrical signals. The electrical contact assembly of the present invention has a simple process, reliable contact performance, and is conducive to mass production.

[0048] In one embodiment, if Figure 2 As shown in Figure 4, the spring sleeve 30 is formed with a spring inner ring 33 located inside the inner sleeve 20 and a spring outer ring 34 located outside the inner sleeve 20. The spring inner ring 33 is a single-leaf hyperboloid structure, which can reduce the terminal insertion and extraction force, reduce the contact resistance and ensure stable contact.

[0049] In one embodiment, if Figure 5 and Figure 6 As shown, the spring sleeve 30 is a coil spring and has a plurality of contact segments 31, and the plurality of contact segments 31 are inclined relative to the central axis of the inner sleeve 20, and the spring inner ring is formed by the plurality of contact segments, so that the spring inner ring 33 can be a single-leaf hyperboloid structure.

[0050] In order to make the spring sleeve on the inner sleeve, the inner ring of the spring naturally forms a single-leaf hyperboloid structure. Figure 5 or Figure 6 The spring sleeve 30 shown in the figure, which is not sleeved on the inner sleeve 20, is used as a reference. The plurality of contact segments 31 are closely arranged along the extension direction (or length direction) of the spring sleeve, and the plurality of contact segments 31 are inclined relative to the central axis of the spring sleeve 30 (here refers to Figure 5 or Figure 6 The central axis of the spring sleeve in the long strip state is shown in FIG. 1 ). Therefore, it can be understood that when the spring sleeve 30 is nested on the inner sleeve 20 and wound along the sleeve, it is equivalent to that a plurality of inclined contact segments 31 are arranged along the circumferential direction of the inner sleeve 20, so that the inner ring formed by the plurality of contact segments 31 can naturally form a single-leaf hyperboloid structure (or cage-type hyperboloid structure) with "large ends and small middle", which ensures that the terminal insertion and extraction force is small, the contact resistance is small, the contact is stable, etc.

[0051] Therefore, the electrical contact assembly 10 of the present invention has a simple process, reliable contact performance, and is conducive to mass production while ensuring small terminal insertion and extraction force, small contact resistance, and stable contact, and can effectively solve some existing technical problems of cage-type hyperboloid spring structures and relatively complex processes.

[0052] In one embodiment, if Figure 1As shown in FIG. 6 , the multiple contact segments 31 on the spring inner ring 33 are densely arranged in a circle. This can ensure that the spring inner ring 33 is installed stably and avoid the spring sleeve 30 from shrinking when it is nested on the inner sleeve 20; it can also enable the multiple contact segments 31 to tightly wrap around the outer surface of the pin terminal, increase the contact area, and thus improve the contact stability and current carrying capacity between the socket terminal 40 and the pin terminal, and reduce the electrical contact resistance.

[0053] In order to allow the plurality of contact segments 31 to be densely arranged in a circumference, the thread pitch can be reasonably reduced when the spring sleeve 30 is manufactured.

[0054] Alternatively, when the multiple contact segments 31 are arranged at intervals (referring to the structural state when the spring sleeve 30 is not sleeved on the inner sleeve 20, the same below), the multiple spring sleeves 30 are interlocked with each other, that is, the contact segment 31 of one spring sleeve 30 is embedded between two contact segments 31 on another spring sleeve 30, thereby ensuring that the multiple contact segments 31 are tightly fitted.

[0055] Alternatively, when the multiple contact segments 31 are arranged at intervals, the length of the spring sleeve 30 along its axial direction can be calculated to be greater than the circumference of the inner sleeve 20, so that when the spring sleeve 30 is nested on the inner sleeve 20, the gaps between the multiple contact segments 31 are compressed, and when the spring sleeve 30 is installed, the multiple contact segments 31 on the formed spring inner ring 33 fit tightly together.

[0056] Of course, in order to prevent the spring sleeve 30 from shrinking when nested on the inner sleeve 20, in one embodiment, the spring sleeve 30 further has two free ends 35 in the circumferential direction of the inner sleeve 20, and one of the free ends 35 is provided with the port 37. The two free ends 35 are elastically abutted, that is, each free end 35 has a tendency to move toward the side where the other free end 35 is located.

[0057] Alternatively, the two free ends 35 are engaged with each other, for example, one free end 35 is clamped between two adjacent spring wires 36 located on the other free end 35, which can also prevent the spring sleeve 30 from shrinking.

[0058] Alternatively, the two free ends 35 may be fixed together by welding or other methods, which may be selected according to actual conditions.

[0059] In one embodiment, if Figure 2 , Figure 4 and Figure 5 As shown, the spring sleeve 30 also has a plurality of clamping sections 32, and the plurality of clamping sections 32 are arranged opposite to the plurality of contact sections 31; before the spring sleeve 30 is nested into the inner sleeve 20, that is, when the spring sleeve is in a long strip-shaped tube sleeve structure (such as Figure 5 or Figure 6 As shown), the plurality of clamping segments 32 are arranged along the extension direction (or length direction) of the spring sleeve and are inclined relative to the central axis of the spring sleeve (here refers to Figure 5 or Figure 6 The spring outer ring 34 is formed by the plurality of clamping sections 32, that is, the spring outer ring 34 can also naturally form a single-leaf hyperboloid structure with "large ends and small middle", so when the middle position of the spring outer ring 34 is concave inward, it will elastically press against the outer surface of the inner sleeve 20, thereby increasing the contact stability of the spring sleeve 30.

[0060] In one embodiment, if Figure 6 As shown, the spring sleeve 30 is made into a square or irregular columnar structure, and the two long sides of the square ring are respectively formed by the contact segment 31 and the clamping segment 32, so that when nested on the inner sleeve 20, multiple contact segments 31 together form a spring inner ring 33, and multiple clamping segments 32 together form a spring outer ring 34.

[0061] Of course, to avoid installation errors, the contact section 31 and the clamping section 32 can be made identical or similar, that is, identical or similar in arrangement, tilt direction, tilt angle, etc. The contact section 31 can form either the inner spring ring 33 or the outer spring ring 34, and the clamping section 32 can similarly form either the inner spring ring 33 or the outer spring ring 34.

[0062] For example, in one embodiment, the spring sleeve 30 as a whole is inclined relative to its central axis toward one of its free ends 35 , so that the contact section 31 and the clamping section 32 are substantially the same or similar.

[0063] In one embodiment, in order to increase the number of contact segments, so that the inner ring of the spring has more contact pairs when in contact with the pin, thereby increasing the current carrying capacity of the terminal, the spring sleeve 30 is made of a plurality of spring wires 36, and the plurality of spring wires 36 are spirally arranged in parallel, or the plurality of spring wires 36 are nested with each other. According to the cross-section of the spring wire 36, the spring wire 36 can be a round spring wire, a square spring wire or a special-shaped spring wire, and the specific one can be selected according to the actual situation.

[0064] The present invention also provides a jack terminal 40, such as Figure 8 As shown, the socket terminal 40 includes a housing 41 and an electrical contact assembly 10, and the electrical contact assembly 10 is installed in the housing 41. The specific structure of the electrical contact assembly 10 refers to the above embodiment. Since the socket terminal 40 adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0065] In one embodiment, if Fig. 9 As shown, the housing 41 is provided with a mounting groove 42, and the mounting groove 42 is used for mounting the power contact assembly 10, and there are many ways to mount the power contact assembly 10 in the mounting groove 42. For example, the spring outer ring 34 of the power contact assembly 10 is interference fit with the inner wall of the mounting groove 42, and the power contact assembly 10 can be directly installed in the mounting groove 42 during installation.

[0066] For example, Fig.10 As shown, the jack terminal 40 also includes a limiter 43, which is arranged at the notch of the mounting slot 42 and is used to limit the electrical contact assembly 10 in the mounting slot 42. During specific installation, the electrical contact assembly 10 can be installed in the mounting slot 42 first, and then the limiter 43 can be installed in the notch of the mounting slot 42 to prevent the electrical contact assembly 10 from falling out of the mounting slot 42. The limiter 43 can be a cover plate structure, and the limiter 43 can be installed at the notch of the mounting slot 42 by screw connection, clamping, etc. In addition, the limiter 43 should be provided with a through hole connected to the mounting slot 42 for the pin terminal to be inserted.

[0067] For example, Fig.11 As shown, the electrical contact assembly 10 further includes an outer sleeve 50, which is sleeved outside the spring outer ring 34, and the outer sleeve 50 is detachably connected to the mounting slot 42. In this way, the electrical contact assembly 10 can be equipped with an outer sleeve 50 of a corresponding size according to the size of the mounting slot 42, and then installed in different socket terminals 40, so that the terminals have good interchangeability and are easy to repair and replace. In another embodiment, as shown in FIG. Fig.12 As shown, the outer sleeve 50 can also be integrally formed with the limiting member 43 .

[0068] In one embodiment, if Fig.13 As shown, a plurality of the electrical contact components 10 are disposed in the socket terminal 40, and the plurality of electrical contact components 10 extend along the same central axis, so that when the pin terminal is inserted, it can abut against a plurality of contact components at the same time, thereby increasing the current carrying capacity of the electrical connector.

[0069] The present invention also proposes an electrical connector, which includes a pin terminal and a socket terminal 40, wherein the socket terminal 40 includes a shell 41 and an electrical contact assembly 10. The specific structures of the electrical contact assembly 10 and the socket terminal 40 refer to the above-mentioned embodiments. Since the electrical connector adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0070] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An electrical contact assembly, characterized in that: include: An inner sleeve, a notch groove is provided on the side surface of the inner sleeve, the notch groove runs through both ends of the inner sleeve in the axial direction; and a spring sleeve, having a port communicating with the interior thereof, the spring sleeve being sleeved onto the inner sleeve from the notch groove of the inner sleeve through the port; The spring sleeve is formed by a spiral spring wire; The cross section of the spiral spring wire is any one of circular, square or semicircular; or, the spring sleeve is formed by nesting a plurality of the spiral spring wires; The spring sleeve is a long tube-shaped structure during production, formed by a spring wire spiral, and its spiral ring is in a square ring or a racetrack shape, and the two long straight sides of the spiral ring form a contact section and a clamping section respectively; after the spring sleeve is nested on the sleeve, it undergoes elastic deformation and extends along the circumferential direction of the inner sleeve to form a columnar structure; The spring sleeve is formed with a spring inner ring located inside the inner sleeve and a spring outer ring located outside the inner sleeve, and the spring inner ring is a single-leaf hyperboloid structure; The spring sleeve is a coil spring and has a plurality of contact segments, the plurality of contact segments are inclined relative to the central axis of the inner sleeve, and the spring inner ring is formed by the plurality of contact segments; The multiple contact segments on the inner ring of the spring are densely arranged in a circumference; The multiple contact segments are closely arranged along the extension direction of the spring sleeve, and the multiple contact segments are inclined relative to the central axis of the spring sleeve; when the spring sleeve is nested on the inner sleeve and wound along the sleeve, the multiple inclined contact segments are arranged along the circumferential direction of the inner sleeve, so that the inner ring formed by the multiple contact segments can naturally form a single-leaf hyperboloid structure with "large ends and small middle"; In the circumferential direction of the inner sleeve, the spring sleeve has two free ends, one of which is provided with the port; The two free ends are elastically abutted against each other, or welded to each other, or have a gap between them; The spring sleeve also has a plurality of clamping segments, the plurality of clamping segments are inclined relative to the central axis of the inner sleeve, and the outer ring of the spring is formed by the plurality of clamping segments; The multiple clamping segments are arranged along the extension direction of the spring sleeve and are inclined relative to the central axis of the spring sleeve; the spring outer ring is formed by the multiple clamping segments, that is, the spring outer ring forms a single-leaf hyperbolic structure with "large ends and small middle".

2. A jack terminal, characterized in that: It comprises a shell and an electrical contact assembly as claimed in claim 1, wherein the electrical contact assembly is installed in the shell; the shell is provided with a mounting groove; the electrical contact assembly is interference fit with the inner wall of the mounting groove; or, the socket terminal further comprises a limiter, the limiter is provided at the notch of the mounting groove and is used to limit the electrical contact assembly in the mounting groove; or, the electrical contact assembly is further covered with an outer sleeve, and the outer sleeve is installed in the mounting groove together with the electrical contact assembly; a plurality of the electrical contact assemblies are provided in the socket terminal, and the plurality of electrical contact assemblies are arranged along the same central axis.

Images