TWM669143U - Male connector with metal barrel and male terminal assembly thereof - Google Patents

Abstract

The present invention is a male connector with a metal cylinder and a male terminal assembly thereof, wherein the male connector is provided with a male base and at least one male terminal assembly, and the male terminal assembly includes a metal cylinder and at least one connecting terminal, wherein a cylinder space is provided inside the metal cylinder; each connecting terminal is respectively provided with a fixing portion and an abutting portion, wherein the fixing portion is used to be fixed to a transmission carrier, and the abutting portion is used to contact an electrical connector; furthermore, the connecting terminal can be located in the cylinder space, and the horizontal height of the bottom surface of the abutting portion will be lower than or flush with the horizontal height of the bottom surface of the metal cylinder, so that the metal cylinder can form a shielding environment to reduce problems such as electromagnetic interference (EMI).

Description

Male connector with metal barrel and male terminal assembly thereof

The invention relates to a male terminal assembly, in particular to a male terminal assembly having a metal barrel, wherein the metal barrel is formed by combining two barrel elements and can accommodate a connecting terminal.

According to the standard, connector refers to all connection components and their accessories used in electronic signal and power transmission. Its main function is to establish and maintain the connection between circuits. It is not only responsible for transmitting power, but also covers data transmission. It is an important component in any modern electronic system. From mobile phones, computers to large industrial machinery and equipment, all rely on connectors to complete their basic functions.

As the purpose and installation location change, connectors also have a variety of different structural types to adapt to and meet the needs of use, such as good shielding performance to reduce electromagnetic interference, emphasize plug stability, durability, waterproof and dustproof or anti-vibration characteristics, etc. As an indispensable component in modern electronic systems, the design and application of connectors are constantly evolving with technological innovation and changes in market demand. Therefore, how to develop connectors with good structures to gain market favor is an important topic of this creation.

In order to stand out in the fiercely competitive market, the creator relied on his rich practical experience in designing, processing and manufacturing various power or signal connectors for many years, and upheld the spirit of continuous improvement. After a long period of hard research and experiments, he finally developed this creation, a male connector with a metal barrel and its male terminal assembly, hoping that the advent of this creation will gain market favor.

One of the purposes of the present invention is to provide a male terminal assembly with a metal cylinder, comprising a metal cylinder and at least one connecting terminal, wherein a cylinder space is provided inside the metal cylinder; each connecting terminal is located in the cylinder space, and is respectively provided with a fixing portion and an abutting portion, wherein the fixing portion is used to be fixed to a transmission carrier, and the abutting portion is used to contact an electrical connector, and the horizontal height of the bottom surface thereof is lower than or flush with the horizontal height of the bottom surface of the metal cylinder, so that the metal cylinder can form a shielding environment to reduce problems such as electromagnetic interference (EMI).

Optionally, the metal cylinder includes an upper cylinder element and a lower cylinder element, wherein an upper cylinder space is provided inside the upper cylinder element; the lower cylinder element is connected to the upper cylinder element in an up-and-down configuration in the vertical axis direction and is located below the upper cylinder element, wherein a lower cylinder space is provided inside the lower cylinder element, and the lower cylinder space is connected to the upper cylinder space to jointly form the cylinder space.

Optionally, the height of the upper cylinder element is smaller than the height of the lower cylinder element.

Optionally, the inner diameter width of the upper tube element is greater than or equal to the outer diameter width of the lower tube element, so that the top end of the lower tube element can extend into the upper tube element.

Optionally, the lower cylinder element is convexly provided with a limiting portion, and when the top end of the lower cylinder element extends into the upper cylinder element, the bottom edge of the upper cylinder element can eventually abut against the limiting portion.

Optionally, the cylinder space can be divided into an upper cylinder space and a lower cylinder space, the upper cylinder space is used to accommodate the fixing portion of the connecting terminal, and its width in the transverse or longitudinal direction is greater than the width in the transverse or longitudinal direction of the lower cylinder space.

Optionally, the metal cylinder can be divided into an upper cylinder portion and a lower cylinder portion, the upper cylinder portion can accommodate the fixing portion of the connecting terminal, and its width in the transverse or longitudinal direction is greater than the width in the transverse or longitudinal direction of the lower cylinder portion to form a configuration that is wide at the top and narrow at the bottom.

Optionally, the male terminal assembly further includes a terminal seat, which can be fixed to the connecting terminal and is located between the fixing portion and the abutting portion and in the metal cylinder.

Optionally, the terminal seat is provided with an upper seat mounting groove and a lower seat mounting groove, and the metal cylinder is provided with a first cylinder mounting portion and a second cylinder mounting portion, the first cylinder mounting portion is used to be mounted to the upper seat mounting groove, and the second cylinder mounting portion is used to be mounted to the lower seat mounting groove.

Optionally, the horizontal width of the upper seat mounting groove is different from the horizontal width of the lower seat mounting groove.

Optionally, the horizontal width of the upper seat mounting groove is smaller than the horizontal width of the lower seat mounting groove.

Optionally, the first tube mounting portion is a spring sheet, and the second tube mounting portion is a protrusion. When the terminal seat extends into the metal cylinder from top to bottom, the free end of the spring sheet will first be deformed and compressed due to the obstruction of the partition wall between the upper seat mounting groove and the lower seat mounting groove, and after crossing the partition wall, it will be embedded in the upper seat mounting groove, and can abut against the groove wall of the upper seat mounting groove adjacent to the partition wall; the protrusion will extend into the lower seat mounting groove, and can abut against the groove wall of the lower seat mounting groove adjacent to the partition wall.

Another object of the present invention is to provide a male connector with a metal cylinder, comprising a male base and at least one male terminal assembly as described above, wherein the male terminal assembly can be fixed to the male base.

Optionally, the male end base is combined with a plurality of male terminal assemblies, and in the male terminal assemblies, the distance between two adjacent metal cylinders near the top end area can be smaller than the distance between them near the top end area.

In order to help you, the review committee, to have a deeper understanding of the purpose, technical features and effects of this creation, we provide an example with diagrams and a detailed description as follows:

In order to make the purpose, technical content and advantages of this creation clearer, the following is further explained in conjunction with specific implementation methods and attached figures. The technical personnel in this field can understand the advantages and effects of this creation, and this creation can be applied through other different specific embodiments. The details in this manual can be modified and changed without deviating from the concept of this creation. In addition, the attached figures of this creation are only for simple schematic illustration and are not drawn according to the actual size. In addition, unless the context clearly indicates or defines otherwise, the meaning of "a" and "the" in this creation includes the plural.

It should be understood that the terms used herein generally have the common meaning in the art, and in the event of a conflict, any definition given herein shall prevail. Since the same thing can be expressed in many ways, the use of alternatives or synonyms does not exclude other synonyms, and the use of terms is illustrative only and does not limit the scope and meaning of this creation or any term. The terms first, second, or third, etc. may be used herein to describe various elements. The aforementioned terms are used to distinguish one element from another, and should not impose any substantial restrictions on any element, nor should they limit the assembly or setting order of each element in practical application. In addition, the directional terms mentioned in the embodiments, such as "up", "down", "front", "back", "left", "right", etc., are only referenced to the directions of the attached drawings. Therefore, the directional terms used are used to illustrate and are not used to limit the scope of protection of this creation. Furthermore, the term "and/or" used herein may include any one or more combinations of the associated listed items as appropriate.

In addition, the terms "substantially" or "approximately" used in the specification may refer to a numerical value or an average value of multiple numerical values within a deviation range of a specific value that can be recognized or determined by technicians in this field, including certain specific errors that may occur when measuring the specific value due to limitations of the measurement system or equipment. For example, the numerical value mentioned substantially may include ±5%, ±3%, ±1%, ±0.5%, ±0.1% and one or more standard deviation ranges of the specific value.

This invention is a male connector with a metal cylinder and its male terminal assembly, which is designed to be used in a connector set C and can be applicable to signal or power transmission of electronic equipment. The basic structure of the connector set C is first introduced. Please refer to Figures 1A and 1B. The connector set C at least includes a female connector 1 and a male connector 2, wherein the female connector 1 can be connected to a transmission carrier, and the male connector 2 can be connected to another transmission carrier. According to product requirements, the types of the two transmission carriers can be the same or different, and can be a circuit board P or a transmission line L, etc. When the female connector 1 and the male connector 2 are plugged into each other, power and/or signal transmission between the two transmission carriers can be achieved.

Continuing from the above, in one embodiment, please refer to FIG. 1A to FIG. 1B again, the female connector 1 includes a female insulated body 11 and a female metal shell 13, and is disposed on a circuit board P, and the circuit board P is provided with a plurality of conductive contacts P1; the male connector 2 is connected to a plurality of transmission lines L, please refer to FIG. 2, the transmission line L is in the form of a coaxial cable, which at least includes A core wire L1, a first insulating layer L2, a metal braided mesh layer L3 and a second insulating layer L4, wherein the core wire L1 is used to transmit electrical signals; the first insulating layer L2 is coated on the outside of the core wire L1; the metal braided mesh layer L3 is arranged on the outside of the first insulating layer L2 to provide grounding and shielding functions; the second insulating layer L4 is coated on the outside of the metal braided mesh layer L3. However, in other embodiments of the present invention, according to product requirements, the number of the transmission line L can be one or more, and the form of the transmission line L can be other specifications, and is not limited to the form of a coaxial cable. Furthermore, the number of the conductive contacts P1 can be one or more, and can be the same as or different from the number of the transmission lines L.

The structure and features of the male connector 2 are described in detail below. To facilitate the description of the features and relative position of the components, the spatial form of the components is defined based on three mutually orthogonal axes in the subsequent description. The three axes are the horizontal axis (X axis), the longitudinal axis (Y axis) and the vertical axis (Z axis). Specifically, the horizontal axis (X axis) refers to the left-right extension direction, wherein the upper left corner of FIG. 1B is the component. 1B is the left side direction of the component, and the lower right side of Figure 1B is the right side direction of the component; the longitudinal axis (Y axis) refers to the front-to-back extension direction, wherein the lower left side of Figure 1B is the front side direction of the component, and the upper right side of Figure 1B is the rear side direction of the component; the vertical axis (Z axis) refers to the up-down extension direction, wherein the upper side of Figure 1B is the upper (top) side direction of the component, and the lower side of Figure 1B is the lower (bottom) side direction of the component.

As mentioned above, please refer to FIG. 1A to FIG. 4 , the male connector 2 includes a male base 21 and at least one connecting terminal 22, wherein the male base 21 is made of an insulating material and can be directly or indirectly covered on a partial portion of the connecting terminal 22 by injection molding, card embedding and/or other processes. In addition, in the embodiment, the male base 21 includes a first base 211 and a second base 212, wherein the first base 211 is located below the second base 212, and its cross-sectional area is smaller than the cross-sectional area of the second base 212, and does not cover the transmission line L, while the second base 212 can cover part of the transmission line L and part of the connecting terminal 22 at the same time, but this is not limited to this. In the present invention, In other embodiments, the male terminal base 21 can be composed of a single component or more than three components, wherein the volume and shape of each component used to constitute the male terminal base 21 can be determined according to product requirements and are not limited to the representation of the diagram, and each component can be coated on the connecting terminal 22 using the same process, or each component can be coated on the connecting terminal 22 using a different process to increase flexibility in design and production.

The form in which the male end base 21 "directly or indirectly" covers the connecting terminal 22 is explained. Please refer to Figures 1A to 4 again. In this embodiment, the male end connector 2 is also provided with at least one metal cylinder 23, and one or more connecting terminals 22 can be located inside a single metal cylinder 23. In addition, the male end base 21 can be coated on the partial outer edge of the metal cylinder 23 by injection molding, embedding or other methods. The aforementioned structural form is "the male end base 21 "indirectly" covers the partial part of the connecting terminal 22", which means that the male end base 21 indirectly contacts the connecting terminal 22 through the metal cylinder 23, and does not directly contact the connecting terminal 22. However, in other embodiments of the invention, the male connector 2 may not be provided with the metal cylinder 23. Therefore, when the male base 21 directly contacts a part of the connection terminal 22, the structure of "the male base 21 'directly' covers a part of the connection terminal 22" is formed. In this way, when the male connector 2 has multiple connection terminals 22, the arrangement position of the connection terminals 22 can be effectively maintained by the design of the male base 21. In addition, the male end base 21 can also serve as a partial docking portion of the male end connector 2, so that it can extend into the docking space of the female end connector 1, and can be provided with a male end snap portion 213 (such as a bump, but not limited thereto) to combine with the corresponding snap unit 1322 of the female end connector 1 to ensure stable plugging between the male end connector 2 and the female end connector 1, and avoid the position deviation of the connection terminal 22 during the plugging process, resulting in poor contact and other problems. It is particularly explained here that the aforementioned docking portion refers to the general term for all components that can extend into the docking space, and is not limited to a specific structure or form; the form of the aforementioned male end snap portion 213 can change with the snap unit 1322, as long as the two can match and combine with each other.

In addition, please refer to Figures 1A to 4 again. The top of the connecting terminal 22 is provided with a fixing portion 221, and the bottom of the connecting terminal 22 is provided with a contact portion 223, wherein the fixing portion 221 can be fixed to the core wire L1 of the transmission line L. In this embodiment, since the transmission line L is electrically connected to the connecting terminal 22 in a vertical direction, please refer to Figure 5. The vertical cross-sectional shape of the fixing portion 221 will actually extend in the direction of the vertical axis to facilitate welding to the core wire L1, but is not limited to this. In other embodiments of the present invention, the fixing portion 221 can be adjusted to other shapes according to actual needs. In addition, as the form of the transmission line L changes, the position where the fixing portion 221 is fixed to the transmission line L can also be adjusted, as long as the fixing portion 221 can be electrically connected to the transmission line L and can transmit electricity and/or signals.

1A to 4 , the contact portion 223 can abut against the conductive contact P1 of the circuit board P. In this embodiment, since the circuit board P is located on a plane (XY plane) formed by a horizontal axis (X axis) and a vertical axis (Y axis), therefore, please refer to FIG. 5 again, the vertical cross-sectional shape of the contact portion 223 can substantially extend along the direction of the horizontal axis or the vertical axis, and its bottom surface can abut against the conductive contact P1 on the circuit board P. Specifically, when the abutting portion 223 is in the initial state (i.e., when not subjected to downward pressure), its vertical cross-sectional shape may be horizontal, arc-shaped, or other shapes extending in the left-right direction or the front-back direction; when the abutting portion 223 is subjected to downward pressure, its shape will deform along with the flat surface of the conductive contact P1 and stick to the conductive contact P1 to transmit electricity and/or signals.

Furthermore, please refer to FIG. 1A to FIG. 4 again. When the male connector 2 is plugged into the female connector 1, the connection terminal 22 will be subjected to downward pressure to closely abut against the conductive contact P1, thereby enabling the transmission line L and the circuit board P to achieve stable transmission of power and/or signals through the connection terminal 22. Based on this, in order to ensure that the connection terminal 22 has flexible structural adjustment capability and structural stability, the connection terminal 22 of the present invention includes but is not limited to the two structural forms described below.

First, please refer to FIG. 2 and FIG. 5. The first structural state is "coaxial spatial configuration". In the geometric relationship, the positions of the fixing portion 221 and the contact portion 223 in three-dimensional space allow the same vertical axis z to pass through part of its structure (as shown in FIG. 5), so that the fixing portion 221 and the contact portion 223 are arranged along the same vertical axis z to form an axial corresponding arrangement relationship. In this way, when the connecting terminal 22 is affected by an external force (downward pressure), the pressure will be concentrated in the direction of the vertical axis z to reduce the uneven distribution and deviation of the force, so as to reduce the deformation, rupture or poor contact of the connecting terminal 22. Furthermore, when the abutting portion 223 is deformed (e.g., from an arc shape to a straight shape) by the downward pressure, since the fixing portion 221 and the abutting portion 223 are axially arranged supports, the deformation will occur uniformly in the direction perpendicular to the axis z, ensuring that the force direction of the connecting terminal 22 is consistent, so that the abutting portion 223 can be stably attached to the conductive contact P1.

Secondly, the second structural aspect is "multi-segment structure and projection configuration", please refer to Figures 2 and 5 again, the middle section 222 of the connecting terminal 22 (that is, the remaining part excluding the fixing portion 221 and the abutting portion 223) is provided with a plurality of bends 225 to form a multi-segment structure, and the multi-segment structure includes a plurality of extension sections. In this embodiment, the extension sections include a plurality of vertical sections 226 and a plurality of intermediate connecting sections 227B, wherein each of the vertical sections 226 substantially extends along the vertical axis (Z axis) direction, and the intermediate connecting section 227B is used to connect two adjacent vertical sections 226. In a preferred case, the vertical section 226 can be completely parallel to the vertical axis, but in actual production it is affected by tolerance or design. As long as the deviation angle θ between the vertical section 226 and its own vertical axis does not exceed 10 degrees, it is referred to as the vertical section 226 in this invention.

Continuing from the above, please refer to FIG. 2 and FIG. 5 again. In this embodiment, the fixing portion 221 is directly connected to the vertical section 226 at the top, and the abutting portion 223 is directly connected to the vertical section 226 at the bottom, wherein the fixing portion 221 and the vertical section 226 at the top extend along the same vertical axis z and are in a straight line shape, but not limited to this. In a variant embodiment of the present invention, please refer to Figure 6, an upper receiving section 227A can be provided between the fixing portion 221 and the vertical section 226 at the top; a lower receiving section 227C can be provided between the abutting portion 223 and the vertical section 226 at the bottom; it can be seen that, according to the actual needs of the product, in some embodiments, the connecting terminal 22 may not be provided with an upper receiving section 227A or a lower receiving section 227C, but the fixing portion 221 can be directly connected to the vertical section 226, or the abutting portion 223 can be directly connected to the vertical section 226; in some embodiments, when both the fixing portion 221 and the vertical section 226 are straight lines, the portion close to the top can be divided into the fixing portion 221, and the remaining portion is the vertical section 226.

Furthermore, referring to FIG. 2 and FIG. 7 , when the connection terminal 22 is provided with more than two vertical segments 226, among all the vertical segments 226, two of the vertical segments 226 that are farthest apart in horizontal position can form a projection range V, and the fixing portion 221 is completely within the projection range V (including the edge of the projection range V). It is particularly mentioned here that the projection range V refers to the range formed by the parts of the two vertical segments 226 that are farthest apart in horizontal position. Thus, since the fixing portion 221 is within the projection range V, the downward pressure transmitted by the fixing portion 221 can be gradually transmitted to the contact portion 223 through each extension section of the multi-stage structure, so that the pressure is gradually dispersed in the middle section 222, effectively avoiding the stress concentration in a single area, thereby improving the durability and stability of the structure. In this embodiment, the contact portion 223 can also be within the projection range V, so that the pressure direction of the connecting terminal 22 remains consistent, but it is not limited thereto.

In addition, please refer to Figures 2 and 5 to 7 again. Through the design of the vertical section 226 and multiple receiving sections 227 (including the upper receiving section 227A, the intermediate receiving section 227B and/or the lower receiving section 227C), the connecting terminal 22 can have both rigidity and elasticity to achieve the buffering and pressure absorption functions, wherein the vertical section 226 can provide higher rigidity and precise pressure transmission direction, effectively reducing the energy loss caused by the change in force direction, and the receiving section 227 is responsible for the smooth transition and absorption of pressure, further improving the mechanical performance of the structure and preventing the connecting terminal 22 from improper deformation or damage. However, in other embodiments of the present invention, the vertical section 226 can be omitted and an extension section of various shapes such as an arc or an oblique straight line (i.e., not extending along the vertical axis (Z axis) direction) can be adopted, as long as the projection range formed by the two extension sections with the farthest horizontal positions among the multiple extension sections included in the multi-section structure can correspond to the fixed portion 221. It is particularly mentioned here that, according to the actual needs of the product, the connection terminal 22 can have a "coaxial space configuration" and a "multi-section structure and projection configuration" structure at the same time, or can only have a "coaxial space configuration" or a "multi-section structure and projection configuration".

In addition, please refer to FIG. 1A to FIG. 3 again. In this embodiment, the connection terminal 22 and the metal cylinder 23 can be used as a male terminal assembly, and the connection terminal 22, the metal cylinder 23 and the transmission line L can be used as a male transmission assembly. When the connection terminal 22 is arranged in the metal cylinder 23, especially in high-frequency applications, the above-mentioned structure can effectively shield external electromagnetic interference through the metal cylinder 23, protect the signal transmission of the internal connection terminal 22, and at the same time, prevent the signal of the connection terminal 22 from radiating to the external environment, ensuring that the electromagnetic compatibility requirements are met. In addition, the metal cylinder 23 has better protection, which can provide good protection for the connection terminal 22 to increase the service life of the connection terminal 22. However, in the actual production process, since the length of the connecting terminal 22 is relatively long and needs to be fixed to the transmission line L, in order to improve the convenience of production or assembly, in this embodiment, please refer to Figure 4 again, the metal cylinder 23 can include an upper cylinder element 231 and a lower cylinder element 232, wherein the upper cylinder element 231 is provided with an upper cylinder space 2310, and the lower cylinder element 232 is provided with a lower cylinder space 2320, and the upper cylinder element 231 and the lower cylinder element 232 can be connected to each other and configured in an up-down manner in the vertical axis direction, so that the upper cylinder element 231 is in an upper position and the lower cylinder element 232 is in a lower position. At the same time, the upper cylinder space 2310 is connected to the lower cylinder space 2320 to form a cylinder space 230.

As mentioned above, please refer to FIGS. 1A to 4 . In this embodiment, two connection terminals 22 can be located in the barrel space 230 and will not contact the metal barrel 23, but the present invention is not limited thereto. According to product requirements, the metal barrel 23 can accommodate one or more than three connection terminals 22. In addition, when the connection terminal 22 is in the metal barrel 23 and the abutting portion 223 has not yet abutted against the conductive contact P1, please refer to FIG. 8A . The horizontal height H1 of the bottom surface of the abutting portion 223 will be lower than the horizontal height H2 of the bottom surface of the lower barrel element 232. In other words, when viewed from the side, the bottom end of the connection terminal 22 will exceed the bottom end of the lower barrel element 232. Thus, since the connecting terminal 22 itself is elastic, after the contact portion 223 contacts the conductive contact P1, it can be retracted into the cylinder space 230, so that the contact portion 223 and the conductive contact P1 can be closely attached. However, in other embodiments of the present invention, according to product requirements, the horizontal height H1 of the bottom surface of the contact portion 223 can be flush with the horizontal height H2 of the bottom surface of the lower cylinder element 232, so that the contact portion 223 can contact the conductive contact P1 without being blocked by the lower cylinder element 232. In addition, in some embodiments, when the female connector 1 is in a form having a female terminal, the abutment portion 223 can also contact the female terminal. In other words, the abutment portion 223 is not limited to abutting against the conductive contact P1, but can include contacting various forms of electrical connectors (such as: conductive contact P1 or female terminal, etc.).

In addition, please refer to FIG. 1A to FIG. 4 again. In this embodiment, the upper cylinder element 231 can be fixed to the transmission line L, and the upper cylinder space 2310 can correspond to the fixing portion 221 of the connection terminal 22 and the core line L1 of the transmission line L. Therefore, in order to facilitate the observation and processing of the connection relationship between the fixing portion 221 and the core line L1, the height (upper and lower directions) of the upper cylinder element 231 can be smaller than the height (upper and lower directions) of the lower cylinder element 232, but not limited thereto. In some embodiments, if the upper cylinder element 231 needs to be additionally provided with other structures or elements, the height of the upper cylinder element 231 can be the same as or greater than the height of the lower cylinder element 232 to improve the flexibility in production and design.

Furthermore, please refer to FIG. 9 , in this embodiment, the inner diameter width of the upper cylinder element 231 can be greater than or equal to the outer diameter width of the lower cylinder element 232, so that the top end of the lower cylinder element 232 can extend into the upper cylinder element 231, thereby making the lower cylinder element 232 and the upper cylinder element 231 partially overlap each other. In addition, in order to achieve a reliable assembly relationship, the upper cylinder element 231 is provided with an upper positioning portion 2311, and the lower cylinder element 232 is provided with a lower positioning portion 2321, wherein the upper positioning portion 2311 is a convex point convexly arranged inwardly, and the lower positioning portion 2321 is a concave cavity concavely arranged inwardly, and the two can be matched and combined, so that the upper cylinder element 231 and the lower cylinder element 232 can be stably assembled with each other, but the present invention is not limited thereto. In other embodiments of the invention, the upper cylinder element 231 and the lower cylinder element 232 can be combined by a tight fit; or, the upper cylinder element 231 and the lower cylinder element 232 can be combined by welding; or, there is no overlap between the upper cylinder element 231 and the lower cylinder element 232, but they are combined into one body by laser welding. In addition, in order to keep the upper cylinder element 231 and the lower cylinder element 232 in the expected assembly position, the lower cylinder element 232 can be provided with at least one stopper 2323, and the top end of the lower cylinder element 232 can extend into the upper cylinder element 231 until the bottom edge of the upper cylinder element 231 abuts against the stopper 2323, so that the lower cylinder element 232 can be prevented from excessively extending into the upper cylinder element 231.

In the aforementioned embodiment, the metal cylinder is a multi-piece cylinder element structure. However, according to product design requirements, in a variant embodiment, the metal cylinder can be designed as a single cylinder, and the internal cylinder space can be divided into an upper cylinder space and a lower cylinder space, wherein the upper cylinder space is used to accommodate the fixing portion of the connecting terminal, and the lower cylinder space can accommodate the remaining portion of the connecting terminal, and the width of the upper cylinder space in the transverse or longitudinal direction is greater than the width of the lower cylinder space in the transverse or longitudinal direction. Thus, the structural design of the wider upper cylinder space can increase the operating space, facilitate the assembly, welding or other process operations between the connection terminal and the transmission line, and effectively reduce the heat accumulation between the connection terminal and the transmission line, thereby improving the thermal stability of the structure.

Continuing from the above, in another variant embodiment, the metal cylinder can be divided into an upper cylinder portion and a lower cylinder portion, the upper cylinder portion can accommodate the fixing portion of the connecting terminal, and the lower cylinder portion can accommodate the remaining portion of the connecting terminal, and the width of the upper cylinder portion in the transverse or longitudinal direction is greater than the width of the lower cylinder portion in the transverse or longitudinal direction to form a configuration that is wide at the top and narrow at the bottom. Thus, when the male connector is provided with multiple metal cylinders, the distance between the upper cylinders of two adjacent metal cylinders can be smaller than the distance between the lower cylinders. In other words, the areas near the top of the two adjacent metal cylinders will be closer, and the areas near the bottom of the two adjacent metal cylinders will be farther away. Since the connection between the transmission terminal and the transmission line is usually an interference-sensitive area, the above structure can form a tighter metal shielding layer at the upper cylinder (i.e., the area near the top of the metal cylinder) to provide a stronger shielding effect, effectively reduce electromagnetic interference (EMI), and thereby improve the integrity and stability of the transmission signal.

The above two variant embodiments are equivalent to forming the upper cylinder element 231 and the lower cylinder element 232 of FIG. 4 into one piece to form a single element, while retaining some features of the multi-piece structure. Specifically, in the variant embodiment, the upper cylinder space and the lower cylinder space in the single cylinder body correspond to the upper cylinder space 2310 and the lower cylinder space 2320 provided in the upper cylinder element 231 and the lower cylinder element 232 in FIG. 4, respectively; in another variant embodiment, the upper cylinder part and the lower cylinder part in the single cylinder body correspond to the upper cylinder element 231 and the lower cylinder element 232 in FIG. 4, respectively. Therefore, the implementation structures can achieve equivalent or similar technical functions and meet different product or production requirements.

In addition, in order to enhance the stability between the metal cylinder 23 and the male end base 21, at least one side of the metal cylinder 23 can be provided with a coupling portion, and the coupling portion is used to connect to the male end base 21, so that the metal cylinder 23 and the male end base 21 can be tightly coupled. Specifically, taking the structure of the coupling portion as a through hole as an example, in this embodiment, please refer to Figures 8A to 8C, one side (e.g., right side) of the metal cylinder 23 is provided with a first through hole 233, and the first through hole 233 can correspond to a partial portion of the connection terminal 22; the other side (e.g., left side) of the metal cylinder 23 is provided with a second through hole 234. In this embodiment, since the length of the lower cylinder element 232 is relatively long, the first through hole 233 and the second through hole 234 can be disposed on the lower cylinder element 232, but the present invention is not limited thereto. Thus, by means of the structure of the first through hole 233 and the second through hole 234, when the male end base 21 or the second base 212 is fixed to the metal cylinder 23 by injection molding, the male end base 21 or the second base 212 can cover the first through hole 233 and/or the second through hole 234, and a part of the male end base 21 or the second base 212 can extend into the first through hole 233 and/or the second through hole 234, so that the metal cylinder 23 and the male end base 21 can be tightly combined.

In addition, please refer to FIG. 8A to FIG. 8C again. In this embodiment, the first through hole 233 and the second through hole 234 are located on two opposite sides and are not located opposite to each other. In this way, the risk of the local structure of the metal cylinder 23 being weakened due to the first through hole 233 and the second through hole 234 being too close can be avoided. However, according to the actual needs of the product, the following changes can be made: (1) The metal cylinder 23 can be provided with multiple first through holes 233 or multiple second through holes 234, and the sizes and shapes of each first through hole 233 or second through hole 234 can be the same or different. (2) The metal cylinder 23 can be provided with the first through hole 233 only on one side. (3) When the metal cylinder 23 has a plurality of first through holes 233 and a plurality of second through holes 234, at least one first through hole 233 and at least one second through hole 234 can be opposite to each other or not opposite to each other. The aforementioned "opposite" means that when the first through hole 233 and the second through hole 234 are located on opposite sides, their extended projection areas at least partially overlap; the aforementioned "not opposite" means that the extended projection areas of the first through hole 233 and the second through hole 234 do not overlap at all, or the two are located on non-opposite sides. (4) When the male connector 2 is provided with a plurality of metal cylinders 23, the sides of the adjacent two metal cylinders 23 with the joints are opposite to each other, but the joints of the two are not opposite to each other; taking FIG. 9 as an example, the right side of the metal cylinder 23 located on the left side of FIG. 9 is provided with a first through hole 233, and the left side of the metal cylinder 23 located on the right side of FIG. 9 is provided with a second through hole 234, and the first through hole 233 and the second through hole 234 have no overlapping area in the horizontal projection direction (not opposite); In particular, although the two metal cylinders 23 in FIG. 9 are each provided with two coupling parts (the first through hole 233 and the second through hole 234), it is not limited thereto. In some embodiments, different metal cylinders 23 can be provided with only a single coupling part, and the position and configuration can be different. In other words, the metal cylinder 23 located on the left side of FIG. 9 can be provided with only the first through hole 233 on the right side, and the metal cylinder 23 located on the right side of FIG. 9 can be provided with only the second through hole 234 on the left side. It can be seen that the naming of the first through hole 233 and the second through hole 234 is only used to distinguish the coupling parts on different sides of the same metal cylinder 23. For different metal cylinders 23, if there is no special restriction, the first through holes 233 of the two can be located on different sides. Thus, although the opposite sides of the two adjacent metal cylinders 23 are respectively provided with through holes, their positions are not opposite. Therefore, the exposed parts of the connection terminals 22 located in different metal cylinders 23 are still shielded by the cylinder wall of the adjacent metal cylinder 23, thereby effectively reducing the interference coupling between high-frequency signals, further improving the crosstalk interference problem, and thus improving the integrity of signal transmission. (5) When the male connector 2 is provided with a plurality of metal cylinders 23, the metal cylinders 23 can form two rows of metal cylinder groups, and the plurality of metal cylinders 23 in each row of metal cylinder groups are arranged along the same reference direction. For example, as shown in Figures 3 and 10, two rows of metal grounding tube sets are arranged along the longitudinal axis (Y axis), and the multiple metal cylinders 23 in each row of metal grounding tube sets are distributed along the transverse axis (X axis). In addition, the first through holes 233 provided on the same side (such as the right side) of two adjacent metal cylinders 23 in different rows have different horizontal heights H3 and H4 of the bottom edges. It is particularly mentioned here that the aforementioned "same side" refers to the side corresponding to the same direction based on the three-dimensional coordinate system when each metal cylinder 23 is provided on the male connector 2.

In addition to the through-hole structure of the coupling part, in a modified embodiment, the coupling part can be a bump, and the number and position thereof can be changed as described above for the first through-hole 233 and the second through-hole 234. For the convenience of explanation, only the different components are numbered, and the remaining identical components still use the original component numbers and are not described in detail. Specifically, please refer to FIG. 11A to FIG. 11C , a first protrusion 233' is provided on one side (e.g., the front side) of the metal cylinder 23. The first protrusion 233' is formed by shearing or punching a local area of the metal cylinder 23 into a sheet, and then tilting the sheet outward to partially exceed the front side of the metal cylinder 23, thereby forming the first protrusion 233'; a second protrusion 234' is provided on the other side (e.g., the rear side) of the metal cylinder 23, and its formation structure can be the same as the first protrusion 233'. In this way, the metal cylinder 23 can be stably combined with the male end base 21 by the structure of the first protrusion 233' and the second protrusion 234'. In addition, in some embodiments, the male base 21 or a part thereof (such as the second base 212) can be made of metal and combined with the metal cylinder 23 in an embedded manner to provide a grounding path and electromagnetic shielding effect, without being limited to the use of insulating materials and injection molding processes.

Furthermore, in order to enable the connecting terminal 22 to be stably assembled into the metal cylinder 23 and maintained in the expected position, in this embodiment, please refer to Figures 2 to 4 again, at least one connecting terminal 22 can be fixed to a terminal seat 24, and the terminal seat 24 will not cover the fixing portion 221 of the connecting terminal 22, so that in subsequent procedures, it is convenient to connect or check the fixing condition between the connecting terminal 22 and the transmission line L (but not limited to this), and then, the terminal seat 24 can be assembled into the metal cylinder 23 together with the connecting terminal 22 thereon. Specifically, the terminal seat 24 is provided with an upper seat mounting groove 241 and a lower seat mounting groove 242, wherein the upper seat mounting groove 241 is extended from the top surface of the terminal seat 24 to be recessed downward, and an opening is formed on one of the side surfaces (such as the front/rear/left/right side) of the terminal seat 24, as shown in FIG. 4, when viewed from the front, the upper seat mounting groove 241 is recessed inward from the front side of the terminal seat 24; the lower seat mounting groove 242 is extended from the bottom surface of the terminal seat 24 to be recessed upward, and an opening is formed on one of the side surfaces (such as the front/rear/left/right side) of the terminal seat 24, as shown in FIG. 4, when viewed from the front, the lower seat mounting groove 242 is recessed inward from the front side of the terminal seat 24.

As mentioned above, please refer to FIG. 2 to FIG. 4 and FIG. 12. The metal cylinder 23 is provided with a first cylinder mounting portion 236 and a second cylinder mounting portion 237. In this embodiment, the lower cylinder element 232 is provided with the first cylinder mounting portion 236 and the second cylinder mounting portion 237 for explanation, wherein the first cylinder mounting portion 236 is used to be mounted to the upper seat mounting groove 241, and the second cylinder mounting portion 237 is used to be mounted to the lower seat mounting groove 242. Specifically, the first cylinder mounting portion 236 is a spring sheet, and is formed by shearing or stamping a local area of the lower cylinder element 232, and will extend toward the lower cylinder space 2320; the second cylinder mounting portion 237 is a protrusion, and is formed by stamping a local area of the lower cylinder element 232 inward. When the terminal seat 24 is installed from top to bottom in the metal cylinder 23, the free end of the spring (the first cylinder mounting portion 236) will first extend into the lower seat mounting groove 242, and then be deformed and compressed due to the obstruction of the partition wall 243 between the upper seat mounting groove 241 and the lower seat mounting groove 242, and after crossing the partition wall 243, it will be embedded in the upper seat mounting groove 241, and can be against the groove wall of the upper seat mounting groove 241 adjacent to the partition wall 243 (as shown in Figure 12), and the protrusion (the second cylinder mounting portion 237) will extend into the lower seat mounting groove 242, and can be against the groove wall of the lower seat mounting groove 242 adjacent to the partition wall 243 (as shown in Figure 12). However, according to the actual needs of the product, the specific forms of the first tube mounting portion 236 and the second tube mounting portion 237 are not limited to the aforementioned structure. In addition, the horizontal width of the upper seat mounting groove 241 can be different from the horizontal width of the lower seat mounting groove 242. In this embodiment, the horizontal width of the upper seat mounting groove 241 can be smaller than the horizontal width of the lower seat mounting groove 242, and the horizontal width of the first tube mounting portion 236 can also be smaller than the horizontal width of the second tube mounting portion 237. In this way, when the terminal seat 24 is assembled to the lower tube element 232 in the wrong direction, it will not be able to be smoothly combined to achieve a foolproof effect.

In order to make the metal cylinder 23 have a good grounding effect and anti-electromagnetic interference capability, please refer to Figures 2 to 4 again. The upper cylinder element 231 is provided with at least one contact portion 2313, and the contact portion 2313 can directly contact the metal woven mesh layer L3 to provide a stable grounding path. According to the requirements of the product or production, the contact portion 2313 can be integrally formed on the upper cylinder element 231, or the contact portion 2313 can be an independent component and can be assembled to the upper cylinder element 231. Various embodiments of the contact portion 2313 are described below. In the first embodiment, the contact portion 2313 is a long sheet and extends upward from the top edge of one side (such as the rear side) of the upper tube element 231. However, in other embodiments of the present invention, the upper tube element 231 can be provided with a plurality of contact portions 2313 located on different sides. In addition, the free section of the long sheet (such as the area near the top in FIG. 4 and FIG. 8A) can be bent inward so that its inner side surface can be directly connected to the metal woven mesh layer L3 (as shown in FIG. 2) for mutual electrical connection. In the first embodiment, the highest horizontal height H5 of the free section of the long sheet (contact portion 2313) will exceed the horizontal height H6 of the top end of the upper tube element 231.

In the second embodiment, please refer to Figures 13A and 13B, the upper tube element 231 is provided with contact parts 2313 on two opposite sides (such as the front side and the rear side), respectively. However, in other embodiments of the present invention, the contact parts 2313 can be provided on any two sides, respectively, or the contact part 2313 can be provided on only a single side. Furthermore, the contact portion 2313 is also a long sheet, and has the bending characteristics and connection relationship as in the first embodiment (the inner side is directly connected to the metal woven mesh layer L3 as shown in FIG. 2 ), and the contact portion 2313 is different from the first embodiment in that the highest horizontal height H7 of the free section of the long sheet (contact portion 2313) will not exceed the horizontal height H8 of the top end of the upper tube element 231. In other words, the top edges of the four sides of the upper tube element 231 will not be at the same horizontal height, and the contact portion 2313 is arranged on a top edge at a lower horizontal height.

In the third embodiment, please refer to Figures 14A and 14B, the upper tube element 231 is provided with contact parts 2313 on two opposite sides (such as the front side and the rear side), respectively. However, in other embodiments of the present invention, the contact parts 2313 can be provided on any two sides, respectively, or the contact part 2313 can be provided on only one side. Furthermore, the contact portion 2313 is also a long strip and has the same bending features and connection relationship as the first embodiment (the inner side is directly connected to the metal woven mesh layer L3 as shown in FIG. 2 ). The contact portion 2313 is different from the first embodiment in that the long strip is separated from a local area in the middle section of the side surface of the upper tube element 231. In other words, the contact portion 2313 is not extended from the top edge of the upper tube element 231.

In the fourth embodiment, as shown in FIG. 15A and FIG. 15B , a contact portion 2313 is provided on one side (e.g., the front side) of the upper cylinder element 231, but in other embodiments of the present invention, the upper cylinder element 231 can be provided with a plurality of contact portions 2313, and located on different sides. In addition, the contact portion 2313 is a long sheet, but it is different from the first embodiment in that the free section of the long sheet can be bent into an arc-shaped configuration, and the arc-shaped configuration is an inverted U-shape when viewed from a vertical cross section, so the long sheet (the contact portion 2313) is directly connected to the metal braided mesh layer L3 by its outer side. It is particularly mentioned here that the outer side and inner side of the contact portion 2313 refer to two opposite sides. Before the long sheet is bent, the side facing away from the upper tube space 2310 (as shown in FIG. 4 ) is the “outer side”, and the side facing the upper tube space 2310 is the “inner side”. In the fourth embodiment, the highest horizontal height H9 of the free section of the long sheet (contact portion 2313) exceeds the horizontal height H10 of the top of the upper tube element 231.

In the fifth embodiment, please refer to Figures 16A and 16B, the upper tube element 231 is provided with contact parts 2313 on two opposite sides (such as the front side and the rear side), respectively. However, in other embodiments of the present invention, the contact parts 2313 can be provided on any two sides, respectively, or the contact part 2313 can be provided on only a single side. Furthermore, the contact portion 2313 is also a long sheet, and has an arc-shaped configuration and connection relationship as in the fourth embodiment (the outer side is directly connected to the metal woven mesh layer L3 as shown in FIG. 15B ). The contact portion 2313 is different from the fourth embodiment in that the highest horizontal height H9 of the free section of the long sheet (contact portion 2313) does not exceed the horizontal height H10 of the top end of the upper cylinder element 231. In addition, the contact portion 2313 of the sixth embodiment can also be formed by separating a local area of the middle section of one side of the upper cylinder element 231 to form a long sheet as the contact portion 2313, as in the third embodiment.

The above is only the preferred embodiment of the present invention. However, the scope of rights claimed by the present invention is not limited thereto. Any equivalent changes that can be easily thought of by those familiar with the art based on the technical content disclosed in the present invention should fall within the scope of protection of the present invention.

1: Female connector 11: Female insulated body 13: Female metal shell 1322: Snap-on unit 2: Male connector 21: Male base 211: First base 212: Second base 213: Male snap-on part 22: Connecting terminal 221: Fixed part 222: Middle section 223: Abutment part 225: Bend 226: Vertical section 227: Receiver section 227A: Upper receiver section 227B: Intermediate receiver section 227C: Lower receiver section 23: Metal cylinder 230: Cylinder space 231: Upper cylinder element 2310: Upper cylinder space 2311: Upper positioning part 2313: Contact part 232: Lower cylinder element 2320: Lower cylinder space 2321: Lower positioning part 2323: Limiting part 233: First through hole 233': First protrusion 234: Second through hole 234': Second protrusion 236: First cylinder mounting part 237: Second cylinder mounting part 24: Terminal seat 241: Upper seat mounting groove 242: Lower seat mounting groove 243: Partition wall C: Connector assembly P: Circuit board P1: Conductive contact L: Transmission line L1: Core wire L2: First insulation layer L3: Metal braided mesh layer L4: Second insulation layer z: Vertical axis V: Projection range θ: Deviation angle H1,H2,H3,H4,H5,H6,H7,H8,H9,H10: Horizontal height

[Figure 1A] is a schematic diagram of the plug-in combination of the connector set of the present invention; [Figure 1B] is an exploded schematic diagram of the connector set of the present invention; [Figure 2] is a cross-sectional schematic diagram of the connector set of the present invention; [Figure 3] is an exploded schematic diagram of the male connector of the present invention; [Figure 4] is an exploded schematic diagram of the metal cylinder and the connecting terminal of the present invention; [Figure 5] is a side view schematic diagram of the connecting terminal of the present invention, and shows the vertical axis of the coaxial spatial configuration; [Figure 6] is a side view schematic diagram of a modified embodiment of the connecting terminal of the present invention; [Figure 7] is a side view schematic diagram of the connecting terminal of the present invention, and shows the projection range with a multi-segment structure and projection configuration; [Figure 8A] is a right side schematic diagram of the metal cylinder of the present invention with the transmission line and the connecting terminal assembled; [Figure 8B] is a three-dimensional schematic diagram of the cross-section of the metal cylinder of the present invention, and the connecting terminal and the terminal seat have been assembled in the metal cylinder; [Figure 8C] is a left-side schematic diagram of the metal cylinder of the present invention, in which the transmission line and the connecting terminal have been assembled; [Figure 9] is a cross-sectional schematic diagram of adjacent metal cylinders of the present invention; [Figure 10] is a side view schematic diagram of adjacent metal cylinders in different rows of the present invention; [Figure 11A] is a three-dimensional schematic diagram of the metal cylinder of a modified embodiment of the present invention; [Figure 11B] is a side view schematic diagram of the metal cylinder of a modified embodiment of the present invention; [Figure 11C] is a cross-sectional schematic diagram of the metal cylinder of a modified embodiment of the present invention; [Figure 12] is a cross-sectional schematic diagram of the lower cylinder element of the present invention, in which the connecting terminal and the terminal seat have been assembled; [Figure 13A] is a three-dimensional schematic diagram of the upper cylinder component of the second embodiment of the present invention; [Figure 13B] is a cross-sectional schematic diagram of the upper cylinder component of the second embodiment of the present invention; [Figure 14A] is a three-dimensional schematic diagram of the upper cylinder component of the third embodiment of the present invention; [Figure 14B] is a cross-sectional schematic diagram of the upper cylinder component of the third embodiment of the present invention; [Figure 15A] is a three-dimensional schematic diagram of the upper cylinder component of the fourth embodiment of the present invention; [Figure 15B] is a cross-sectional schematic diagram of the upper cylinder component of the fourth embodiment of the present invention; [Figure 16A] is a three-dimensional schematic diagram of the upper cylinder component of the fifth embodiment of the present invention; and [Figure 16B] is a cross-sectional schematic diagram of the upper cylinder component of the fifth embodiment of the present invention.

22: Connecting terminal

23: Metal cylinder

230: Cylinder space

231: Upper tube element

2310: Upper tube space

2311: Upper positioning part

2313: Contact part

232: Lower tube element

2320: Lower barrel space

2321: Lower positioning part

2323: Limiting part

233: First through hole

236: First tube installation part

237: Second tube installation part

24: Terminal block

241: Upper seat mounting slot

242: Lower seat mounting slot

243: Next door

Claims (14)

A male terminal assembly with a metal cylinder comprises: A metal cylinder having a cylinder space therein; and At least one connecting terminal located in the cylinder space, each connecting terminal having a fixing portion and an abutting portion, wherein the fixing portion is used to fix to a transmission carrier, and the abutting portion is used to contact an electrical connector, and the level of the bottom surface thereof is lower than or flush with the level of the bottom surface of the metal cylinder. The male terminal assembly as described in claim 1, wherein the metal cylinder comprises: an upper cylinder element, wherein an upper cylinder space is provided therein; and a lower cylinder element, which is connected to the upper cylinder element in an up-down configuration in the vertical axis direction and is located below the upper cylinder element, wherein a lower cylinder space is provided therein, and the lower cylinder space is connected to the upper cylinder space to form the cylinder space together. A male terminal assembly as described in claim 2, wherein the height of the upper tube element is less than the height of the lower tube element. A male terminal assembly as described in claim 2, wherein the inner diameter width of the upper tube element is greater than or equal to the outer diameter width of the lower tube element, so that the top end of the lower tube element can extend into the upper tube element. As described in claim 4, the male terminal assembly, wherein the lower tube element is protruding with a limit portion, and when the top end of the lower tube element extends into the upper tube element, the bottom edge of the upper tube element can eventually abut against the limit portion. A male terminal assembly as described in claim 1, wherein the cylinder space can be divided into an upper cylinder space and a lower cylinder space, the upper cylinder space is used to accommodate the fixing portion of the connecting terminal, and its width in the transverse or longitudinal direction is greater than the width in the transverse or longitudinal direction of the lower cylinder space. A male terminal assembly as described in claim 1, wherein the metal cylinder can be divided into an upper cylinder portion and a lower cylinder portion, the upper cylinder portion can accommodate the fixing portion of the connecting terminal, and the width of the upper cylinder portion in the transverse or longitudinal direction is greater than the width of the lower cylinder portion in the transverse or longitudinal direction, so as to form a configuration that is wide at the top and narrow at the bottom. The male terminal assembly as described in any one of claims 1 to 7 also includes a terminal seat that can be fixed to the connecting terminal and is located between the fixing portion and the abutting portion and in the metal cylinder. A male terminal assembly as described in claim 8, wherein the terminal seat is provided with an upper seat mounting groove and a lower seat mounting groove, and the metal cylinder is provided with a first cylinder mounting portion and a second cylinder mounting portion, the first cylinder mounting portion is used to be mounted to the upper seat mounting groove, and the second cylinder mounting portion is used to be mounted to the lower seat mounting groove. A male terminal assembly as described in claim 9, wherein the horizontal width of the upper mounting groove is different from the horizontal width of the lower mounting groove. A male terminal assembly as described in claim 10, wherein the horizontal width of the upper mounting groove is smaller than the horizontal width of the lower mounting groove. A male terminal assembly as described in claim 11, wherein the first tube mounting portion is a spring sheet and the second tube mounting portion is a protrusion. When the terminal seat extends from top to bottom into the metal tube body, the free end of the spring sheet will first be deformed and compressed due to the obstruction of the partition wall between the upper seat mounting groove and the lower seat mounting groove, and then be embedded in the upper seat mounting groove after crossing the partition wall, and can abut against the groove wall of the upper seat mounting groove adjacent to the partition wall; the protrusion will extend into the lower seat mounting groove, and can abut against the groove wall of the lower seat mounting groove adjacent to the partition wall. A male connector with a metal barrel, comprising: a male base; and at least one male terminal assembly as described in any one of claims 1 to 12, which can be fixed to the male base. A male end connector as described in claim 13, wherein the male end base is combined with a plurality of male end terminal assemblies, and in the male end terminal assemblies, the distance between two adjacent metal cylinders near the top end area can be smaller than the distance between them near the top end area.

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