coaxial connector

Abstract

This invention discloses a coaxial connector, including a housing with an opening, a terminal assembly housed within the housing, and an elastic element. The terminal assembly has an insertion port facing the opening. Under normal conditions, the elastic element provides elastic force to the terminal assembly in the circumferential direction to limit the terminal assembly to a first position. When the terminal assembly is subjected to an external force, the elastic element deforms under the force, causing the terminal assembly to move to a second position in the circumferential direction.

Description

[Technical Field]

[0001] This invention relates to a coaxial connector, and more particularly to a coaxial connector disposed within a communication device. [Background Technology]

[0002] The moving terminal of existing coaxial connectors is usually in a fixed position, which necessitates precise installation of the coaxial connector to achieve reliable mating with the mating connector. If there is any error in the installation position of the coaxial connector, it will prevent mating with the mating connector.

[0003] Therefore, it is indeed necessary to provide a new coaxial connector to overcome the above-mentioned defects. [Summary of the Invention]

[0004] The purpose of this invention is to provide a coaxial connector in which the terminal assembly can move in the circumferential direction.

[0005] To achieve the above objectives, the present invention discloses a coaxial connector, including a housing with an opening, a terminal assembly housed within the housing, and an elastic element. The terminal assembly has an insertion port facing the opening. Under normal conditions, the elastic element provides elastic force to the terminal assembly in the circumferential direction to limit the terminal assembly to a first position. When the terminal assembly is subjected to an external force, the elastic element deforms under the force, causing the terminal assembly to move to a second position in the circumferential direction.

[0006] Furthermore, the elastic member is provided with a plurality of elastic arms arranged in the circumferential direction to provide elastic force to the terminal assembly. Under normal conditions, the plurality of elastic arms limit the terminal assembly to a first position. When the terminal assembly is subjected to an external force, the plurality of elastic arms deform under the force, causing the terminal assembly to move to a second position in the circumferential direction.

[0007] Furthermore, the elastic element includes an annular substrate and a plurality of elastic arms formed by bending inward from the annular substrate.

[0008] Furthermore, the plurality of elastic arms include a first elastic arm extending upward from the annular substrate and a second elastic arm extending downward from the annular substrate.

[0009] Furthermore, in the circumferential direction, the first elastic arm and the second elastic arm are arranged adjacent to each other.

[0010] Furthermore, the annular substrate includes a first recess with a downward notch and a second recess with a downward notch connected to the first recess in the circumferential direction. The bottom of the first recess extends downward and folds upward to form the first elastic arm, and the bottom of the second recess extends upward and folds downward to form the second elastic arm.

[0011] Furthermore, the housing includes a bottom wall, a peripheral wall, and a top wall, which together form a receiving cavity for the terminal assembly and the elastic element. The opening is located in the top wall. The bottom wall is made of a metal material. The terminal assembly includes an annular base electrically connected to the bottom wall, an annular sidewall extending upward from the annular base, and a plurality of independent inclined elastic arms extending inward and downward from the upper end of the annular sidewall. The plurality of inclined elastic arms surround the insertion port, and the plurality of elastic arms abut against the outer surface of the annular sidewall.

[0012] Furthermore, the housing includes a bottom wall, a peripheral wall, and a top wall. The bottom wall, peripheral wall, and top wall form a receiving cavity for receiving the terminal assembly and the elastic element. The bottom wall is electrically connected to the terminal assembly. The lower edge of the peripheral wall extends outward to form an annular substrate. The annular substrate is recessed to form a notch. The peripheral edge of the bottom wall extends upward to form a first portion that passes through the notch and a second portion located above the annular substrate with a width greater than the first portion. The lower edge of the second portion abuts downward against the upper surface of the annular substrate.

[0013] Furthermore, the coaxial connector further includes a plastic cylindrical body. The housing includes a bottom wall, a peripheral wall, and a top wall. The bottom wall, peripheral wall, and top wall form a receiving cavity for the terminal assembly, the elastic element, and the plastic cylindrical body. The opening is located on the top wall. The bottom wall is made of metal. The plastic cylindrical body extends through its upper and lower end faces to form an accommodating space. The terminal assembly includes several independent terminal units. Each terminal unit includes a holding portion fixed to the cylindrical wall of the plastic cylindrical body, an elastic contact arm protruding into the accommodating space, and an elastic abutment arm extending downward from the lower end of the plastic cylindrical body and electrically connected to the bottom wall. The several elastic contact arms surround to form the insertion port, and the several elastic arms abut against the outer surface of the cylindrical wall of the plastic cylindrical body.

[0014] Furthermore, the peripheral wall and top wall of the shell are made of plastic material, the upper end face of the plastic cylinder is located below the top wall, and the upper end face of the plastic cylinder protrudes upward to form a protrusion within the opening of the top wall. The accommodating space extends upward through the protrusion, and the protrusion has an annular inner surface that is wider at the top and narrower at the bottom. The radial dimension of the protrusion is smaller than the radial dimension of the opening.

[0015] Furthermore, the elastic contact arm extends upward from the upper end of the retaining portion, and the elastic abutment arm bends outward from the lower end of the retaining portion, with the plate surface of the elastic abutment arm facing the bottom wall.

[0016] Furthermore, the lower end of the plastic cylinder wall is recessed upward to form a retaining groove for the retaining part to be inserted upward. The elastic abutment arm includes a horizontal segment formed by bending outward from the lower end of the retaining part and an arc segment extending from one side of the horizontal segment. The arc segment of each terminal unit extends in a counterclockwise or clockwise direction, and the arc segments of several terminal units are generally arranged to form a ring structure.

[0017] Furthermore, the lower end of the plastic cylinder wall protrudes downward to form several limiting protrusions, and the horizontal segment is disposed between two of the limiting protrusions. The outer surface of the limiting protrusion in the circumferential direction is an arc surface opposite to the inner edge of the arc segment.

[0018] Furthermore, the coaxial connector further includes a plastic cylindrical body. The housing includes a bottom wall, a peripheral wall, and a top wall. The bottom wall, peripheral wall, and top wall form a receiving cavity for the terminal assembly, the elastic element, and the plastic cylindrical body. The opening is located on the top wall. The bottom wall is made of metal. The plastic cylindrical body extends through its upper end face to form an accommodating space. The terminal assembly has a holding portion fixed to the plastic cylindrical body, a contact portion protruding into the accommodating space, and an abutment portion extending downward from the lower end of the plastic cylindrical body and electrically connected to the bottom wall. The contact portion forms the insertion port. The elastic element is a helical spring surrounding the periphery of the cylindrical wall of the plastic cylindrical body. The helical spring includes a small-diameter portion that is circumferentially arranged and abuts against the outer surface of the cylindrical wall of the plastic cylindrical body, and a large-diameter portion with a diameter larger than the small-diameter portion that is spaced apart from the outer surface of the cylindrical wall of the plastic cylindrical body. The large-diameter portion is confined within the housing.

[0019] Furthermore, the housing includes a bottom wall, a peripheral wall, and a top wall, which together form a receiving cavity for the terminal assembly, the elastic element, and the plastic cylinder. The opening is located on the top wall. The peripheral wall is integrally connected to the top wall and is made of plastic material. The bottom wall is made of metal material.

[0020] Compared with the prior art, the present invention has the following beneficial effects: The coaxial connector of the present invention provides elastic force to the terminal assembly in the circumferential direction by means of an elastic element. Under normal conditions, the elastic element limits the terminal assembly to a first position. When the terminal assembly is subjected to external force, the elastic element deforms under force, causing the terminal assembly to move to a second position in the circumferential direction. [Attached Image Description]

[0021] Figure 1 This is a perspective view of the first embodiment of the coaxial connector of the present invention.

[0022] Figure 2 yes Figure 1 A stereoscopic view from another perspective.

[0023] Figure 3 This is an exploded perspective view of the first embodiment of the coaxial connector of the present invention.

[0024] Figure 4 yes Figure 3 A three-dimensional exploded view from another perspective.

[0025] Figure 5 This is a perspective view of some components in the first embodiment of the coaxial connector of the present invention.

[0026] Figure 6 yes Figure 1 A sectional view along line AA.

[0027] Figure 7 yes Figure 1 A cross-sectional view along line BB, with the terminal assembly in the first position.

[0028] Figure 8 yes Figure 7 A cross-sectional view showing the terminal assembly in the middle moved to the second position.

[0029] Figure 9 This is a perspective view of the second embodiment of the coaxial connector of the present invention.

[0030] Figure 10 yes Figure 9 A stereoscopic view from another perspective.

[0031] Figure 11 This is an exploded perspective view of the second embodiment of the coaxial connector of the present invention.

[0032] Figure 12 yes Figure 11 A three-dimensional exploded view from another perspective.

[0033] Figure 13 This is an exploded perspective view of the mating of some components in the second embodiment of the coaxial connector of the present invention.

[0034] Figure 14 yes Figure 13 A three-dimensional exploded view from another perspective.

[0035] Figure 15 This is a perspective view of some components mating together in the second embodiment of the coaxial connector of the present invention.

[0036] Figure 16 yes Figure 9 A cross-sectional view along line CC, with the terminal assembly in the first position.

[0037] Figure 17 yes Figure 16 A cross-sectional view of the middle terminal assembly moved to the second position.

[0038] Figure 18 It is an exploded perspective view of the third embodiment of the coaxial connector of the present invention.

[0039] Figure 19 It is an exploded perspective view of the mating of some components of the third embodiment of the coaxial connector of the present invention.

[0040] Figure 20 It is a schematic cross-sectional view of the third embodiment of the coaxial connector of the present invention, wherein the terminal assembly is in the first position.

[0041] Figure 21 It is Figure 20 a cross-sectional view in which the terminal assembly in is moved to the second position.

[0042] The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings.

Specific Embodiments

[0043] The following will describe the specific embodiments of the coaxial connectors 100, 100', 100" of the present invention in conjunction with the drawings Figures 1 to 21 wherein the disclosed coaxial connector 100 is the first embodiment of the present invention, Figures 1 to 8 the disclosed coaxial connector 100' is the second embodiment of the present invention, Figures 9 to 17 and the disclosed coaxial connector 100" is the third embodiment of the present invention. Figures 18 to 21

[0044] Figures 1 to 8 Refer Figures 1 to 8 as shown, the first embodiment of the present invention will be described first. The coaxial connector 100 in the first embodiment includes a housing 1, a terminal assembly 2 housed in the housing 1, and an elastic member 3 housed in the housing 1. The elastic member 3 provides an elastic force to the terminal assembly 2 in the circumferential direction in the normal state to limit the terminal assembly 2 to the first position a. When an external force is applied to the terminal assembly 2, the elastic member 3 is deformed by the force, causing the terminal assembly 2 to move to the second position b in the circumferential direction.

[0045] The housing 1 of the coaxial connector 100 includes a top wall 11, a peripheral wall 12, and a bottom wall 13. The top wall 11, the peripheral wall 12, and the bottom wall 13 form a receiving cavity 14 for receiving the terminal assembly 2 and the elastic member 3. The top wall 11 has an opening 110, and the terminal assembly 2 has an insertion port 201 facing the opening 110. A through inspection hole 130 is provided at the center of the bottom wall 13 for observing whether there is any abnormality in the coaxial connector 100.

[0046] The elastic element 3 is preferably made of a metal material, specifically stainless steel. The elastic element 3 has a plurality of elastic arms 301 arranged in the circumferential direction to provide elastic force to the terminal assembly 2. Under normal conditions, the elastic arms 301 confine the terminal assembly 2 to a first position a. When the terminal assembly 2 is subjected to an external force, especially a circumferential force, the elastic arms 301 deform under the force, causing the terminal assembly 2 to move in the circumferential direction to a second position b. The second position b can be any position deviating from the first position a in the circumferential direction, rather than a specific position. In the first embodiment of the present invention, under normal conditions, the elastic arms 301 are disposed on the outer side of the terminal assembly 2 in the circumferential direction and abut inward against the outer surface 202 of the terminal assembly 2 in the circumferential direction; that is, the elastic arms 301 provide a corresponding elastic thrust to the terminal assembly 2 in the circumferential direction to hold the terminal assembly 2 in the first position a. In some other embodiments, under normal conditions, a plurality of elastic arms 301 may also abut against the inner surface of the terminal assembly 2 in the circumferential direction, that is, the plurality of elastic arms 301 provide a corresponding elastic tension in the circumferential direction to hold the terminal assembly 2 in the first position a.

[0047] The terminal assembly 2 in the first embodiment includes an annular base 21, an annular sidewall 22 extending upward from the annular base 21, and a plurality of independent inclined spring arms 23 extending inwardly and downward from the upper end of the annular sidewall 22. The plurality of inclined spring arms 23 surround the insertion port 201. The plurality of elastic arms 301 abut against the outer surface 202 of the annular sidewall 22 in the circumferential direction. Preferably, the annular sidewall 22 is formed by a plurality of sidewall portions 221 spaced apart from each other in the circumferential direction, and the upper end of each sidewall portion 221 extends inwardly and downward to form one inclined spring arm 23, thereby providing better elasticity for the inclined spring arms 23.

[0048] In the first embodiment, the bottom wall 13 of the housing 1 is made of a metal material, and the bottom wall 13 is welded to a circuit board (not shown). Specifically, the bottom wall 13 is made of a copper alloy material, and the annular base 21 of the terminal assembly is electrically connected to the bottom wall 13. In addition, the top wall 11 and the peripheral wall 12 are also made of a metal material, and the top wall 11 and the peripheral wall 12 are an integral member, and the bottom wall 13 is assembled and held at the lower end of the peripheral wall 12. Specifically, the lower end edge of the peripheral wall 12 extends outward to form an annular substrate 121, and a notch 1211 is recessed inwardly at the outer edge of the annular substrate 121. A retaining piece 131 is formed by the peripheral edge of the bottom wall 13 extending upward to be fixed to the peripheral wall 12. The retaining piece 131 includes a first part 1311 that passes upward through the notch 1211 and a second part 1312 that is wider than the first part 1311 and is located above the annular substrate 121. The lower edge of the second part 1312 abuts downward against the upper surface 1212 of the annular substrate 121. It is worth mentioning that the top wall 11 and the peripheral wall 12 in the first embodiment are not limited to being made of a metal material, and they can also be made of a plastic material.

[0049] In the first embodiment, the elastic member 3 includes an annular substrate 31 and a plurality of elastic arms 301 that are bent and extended inward from the annular substrate 31. The annular substrate 31 surrounds the outer periphery of the terminal assembly 2. The plurality of elastic arms 301 include a first elastic arm 3011 that extends upward from the annular substrate 31 and a second elastic arm 3012 that extends downward from the annular substrate 31. By abutting the first elastic arm 3011 and the second elastic arm 3012, which extend in opposite directions in the up and down direction, against the outer surface 202 in the circumferential direction of the annular side wall 22 of the terminal assembly 2, the terminal assembly 2 can be stably positioned. Preferably, in the circumferential direction, the first elastic arm 3011 and the second elastic arm 3012 are arranged adjacent to each other. In this way, the terminal assembly 2 can be positioned more stably. Specifically, the annular substrate 31 includes a first recess 311 with a downward notch and a second recess 312 with an upward notch that is connected to the first recess 311 in the circumferential direction. The first elastic arm 3011 is an upward-opening V-shaped elastic member that extends downward from the bottom of the first recess 311 and then bends upward, and the second elastic arm 3012 is a downward-opening V-shaped elastic member that extends upward from the bottom of the second recess 312 and then bends downward.

[0050] See Figures 9 to 17 , and in combination with Figures 1 to 8As shown, a coaxial connector 100' according to a second embodiment of the present invention will be described. The coaxial connector 100' further includes a plastic cylinder 4' for holding the terminal assembly 2'. Compared to the coaxial connector 100 of the first embodiment, the structure of the terminal assembly 2' in the second embodiment is different, and the elastic member 3' directly abuts against the plastic cylinder 4' to indirectly provide an elastic force for holding the terminal assembly 2' in the plastic cylinder 4' in the circumferential direction. The construction of the elastic member 3' in the second embodiment is the same as that in the first embodiment, and will not be described again here. Under normal conditions, the elastic arm 301' of the elastic member 3' abuts against the outer surface of the plastic cylinder 4' to hold the terminal assembly 2' in the first position a'. Similarly, the first elastic arm 3011' and the second elastic arm 3012' extending in opposite directions in the vertical direction can more stably hold the plastic cylinder 4' and the terminal assembly 2' held by the plastic cylinder 4' in the first position a'. When the terminal assembly 2' or the plastic cylinder 4' is subjected to external force, the elastic arm 301' of the elastic member 3' deforms under force, causing the terminal assembly 2 to move to the second position b' in the circumferential direction.

[0051] The plastic cylinder 4' extends through its upper and lower end faces to form an accommodating space 41' communicating with the opening 110'. The terminal assembly 2' includes several independent terminal units 20'. Each terminal unit 20' includes a holding portion 202' fixed to the cylinder wall 40' of the plastic cylinder 4', an elastic contact arm 203' protruding into the accommodating space 41', and an elastic abutting arm 204' extending downward from the lower end of the plastic cylinder 4'. The elastic contact arms 203' of the several terminal units 20' surround to form an insertion port 201'. The elastic contact arm 203' extends upward from the upper end of the holding portion 202', and the elastic abutting arm 204' bends outward from the lower end of the holding portion 202'. The plate surface of the elastic abutting arm 204' faces the bottom wall 13'. In a preferred embodiment of the second embodiment, the top wall 11' and the peripheral wall 12' of the housing 1' are integrally connected and made of plastic material, while the bottom wall 13' of the housing 1' is made of metal material, specifically copper alloy material. The bottom wall 13' is soldered to a circuit board (not shown). A plurality of protrusions 121' are formed on the lower outer surface of the peripheral wall 12', and a retaining piece 131' extends upward from the periphery of the bottom wall 13'. The retaining piece 131' has through holes 1311' that engage with the protrusions 121'. The plastic cylinder 4', the terminal assembly 2', and the elastic member 3' are housed in a receiving cavity 14' formed by the top wall 11', the peripheral wall 12', and the bottom wall 13'. The elastic abutment arm 204' of the terminal unit 20' is in electrical contact with the bottom wall 13'.

[0052] In the second embodiment, the upper end surface 42' of the plastic cylinder body 4' is located below the top wall 11'. A protruding column 43' is formed by upward protrusion of the upper end surface 42' of the plastic cylinder body 4' and is located within the opening 110' of the top wall 11'. The radial dimension of the protruding column 43' is smaller than the radial dimension of the opening 110'. The accommodating space 41' further penetrates upward through the protruding column 43', and the protruding column 43' has an annular inner surface 431' that is wider at the top and narrower at the bottom. A holding groove 401' for upward insertion and assembly of the holding portion 202' is formed by downward concavity at the lower end of the cylinder wall 40' of the plastic cylinder body 4'. The elastic abutting arm 204' includes a horizontal segment 2041' formed by horizontally bending outward from the lower end of the holding portion 202' and an arc segment 2042' extending from one side of the horizontal segment 2041'. The arc segment 2042' abuts downward against the bottom wall 13'. The arc segments 2042' of each terminal unit 20' extend in a counterclockwise or clockwise direction. The arc segments 2042' of several terminal units 20' generally enclose a ring structure, that is, the heads and tails of the arc segments 2042' of adjacent terminal units 20' are adjacent. A plurality of limiting protrusions 402' are formed by downward protrusion of the lower end surface of the cylinder wall 40' of the plastic cylinder body 4'. The horizontal segment 2041' of each terminal unit 20' is disposed between two adjacent limiting protrusions 402'. The outer surface in the circumferential direction of the limiting protrusion 402' is an arc surface opposite to the inner edge of the arc segment 2042'. When the elastic abutting arm 204' moves relative to the bottom wall 13', the arc surface of the limiting protrusion 402' provides stable abutting and limiting for the arc segment 2042' of the elastic abutting arm 204'.

[0053] See Figures 18 to 21 , and in combination with Figures 9 to 17The coaxial connector 100” of the third embodiment of the present invention will be described below. Compared with the second embodiment, the coaxial connector 100” in the third embodiment is basically the same as that in the second embodiment except for the elastic element 3”. That is, in the third embodiment, the top wall 11” and the peripheral wall 12” of the housing 1” are the same as those in the second embodiment, both of which are made of integrally connected plastic material, while the bottom wall 13” of the housing 1” is made of metal material; the structure of the terminal assembly 2” is the same as that of the terminal assembly 2’ in the second embodiment; compared with the plastic cylinder 4’ in the second embodiment, the plastic cylinder 4” omits the protrusion 43’, and the accommodating space 41” extends upward through the upper end face 42’ of the plastic cylinder 4” to form an annular inner surface 421” that is wider at the top and narrower at the bottom. It should be noted that, in both the second and third embodiments, the elastic contact arm of the terminal assembly can be replaced with a contact part (not shown) that does not have an elastic function. Similarly, the elastic abutment arm can also be an abutment part (not shown) that does not have an elastic function. The third embodiment will be described below. In the third embodiment, which differs from the second embodiment, the elastic element 3” is a helical spring housed in the receiving cavity 14” formed by the top wall 11”, peripheral wall 12”, and bottom wall 13” of the housing 1”. The helical spring surrounds the periphery of the cylindrical wall 40” of the plastic cylinder 4”. The helical spring includes a small-diameter portion 31” that is circumferentially arranged and abuts against the outer surface of the cylindrical wall 40” of the plastic cylinder 4” and a large-diameter portion 32” with a diameter greater than the small-diameter portion. The large-diameter portion 32” is attached to the cylindrical wall. The outer surfaces of the 40” are spaced apart, and the large-diameter portion 32” is confined within the housing 1”. Preferably, the outer periphery of the large-diameter portion 32” abuts against the inner surface of the peripheral wall 12”. Normally, the terminal assembly 2” is indirectly confined to the first position a” by the elastic element 3” which is a helical spring ringing the plastic cylinder 4”. When the terminal assembly 2” or the plastic cylinder 4” is subjected to an external force, the elastic element 3” is deflected by the force, thereby allowing the terminal assembly 2” to move to the second position b in the circumferential direction.

[0054] The above descriptions are merely several embodiments of the present invention, and not all embodiments. Any equivalent changes to the technical solutions of the present invention made by those skilled in the art through reading the present invention specification are covered by the claims of the present invention.

Claims

1. A coaxial connector, comprising a housing with an opening, a terminal assembly housed within the housing, and an elastic element, characterized in that: The terminal assembly has an insertion port facing the opening. Under normal conditions, the elastic element provides elastic force to the terminal assembly in the circumferential direction to limit the terminal assembly to a first position. When the terminal assembly is subjected to an external force, the elastic element deforms under the force, causing the terminal assembly to move to a second position in the circumferential direction. The housing includes a bottom wall, a peripheral wall, and a top wall. The bottom wall, peripheral wall, and top wall form a receiving cavity for accommodating the terminal assembly and the elastic element. The opening is disposed on the top wall. The bottom wall is made of a metal material. The terminal assembly has an upper end and a lower end relative to the upper end. The opening is located at the upper end of the terminal assembly. The lower end of the terminal assembly electrically abuts against the bottom wall and can move in the circumferential direction relative to the bottom wall.

2. The coaxial connector as described in claim 1, characterized in that: The elastic member is provided with a plurality of elastic arms arranged in the circumferential direction to provide elastic force to the terminal assembly. Under normal conditions, the plurality of elastic arms limit the terminal assembly to a first position. When the terminal assembly is subjected to an external force, the plurality of elastic arms deform under the force, causing the terminal assembly to move to a second position in the circumferential direction.

3. The coaxial connector as described in claim 2, characterized in that: The elastic element includes an annular base plate and a plurality of elastic arms formed by bending inward from the annular base plate.

4. The coaxial connector as described in claim 3, characterized in that: The elastic arms include a first elastic arm extending upward from the annular substrate and a second elastic arm extending downward from the annular substrate.

5. The coaxial connector as described in claim 4, characterized in that: In the circumferential direction, the first elastic arm and the second elastic arm are arranged adjacent to each other.

6. The coaxial connector as described in claim 5, characterized in that: The annular substrate includes a first recess with a downward notch and a second recess with a downward notch connected to the first recess in the circumferential direction. The bottom of the first recess extends downward and folds upward to form the first elastic arm, and the bottom of the second recess extends upward and folds downward to form the second elastic arm.

7. The coaxial connector as described in claim 2, characterized in that: The terminal assembly includes an annular base electrically connected to the bottom wall at the lower end, an annular sidewall extending upward from the annular base, and a plurality of independent inclined elastic arms extending inward and downward from the upper end of the annular sidewall. The plurality of inclined elastic arms surround the insertion port, and the plurality of elastic arms abut against the outer surface of the annular sidewall.

8. The coaxial connector as described in claim 1, characterized in that: The bottom wall is electrically connected to the lower end of the terminal assembly. The lower edge of the peripheral wall extends outward to form an annular substrate. The annular substrate is recessed to form a notch. The periphery of the bottom wall extends upward to form a first part that passes through the notch and a second part located above the annular substrate with a width greater than the first part. The lower edge of the second part abuts against the upper surface of the annular substrate.

9. The coaxial connector as described in claim 2, characterized in that: The coaxial connector further includes a plastic cylindrical body. The bottom wall, peripheral wall, and top wall constitute the receiving cavity for receiving the terminal assembly, the elastic element, and the plastic cylindrical body. The plastic cylindrical body extends through its upper and lower end faces to form an accommodating space. The terminal assembly includes a plurality of independent terminal units. Each terminal unit includes a holding portion fixed to the cylindrical wall of the plastic cylindrical body, an elastic contact arm protruding into the accommodating space, and an elastic abutting arm extending downward from the lower end of the plastic cylindrical body and electrically connected to the bottom wall. The plurality of elastic contact arms surround to form the insertion port, and the plurality of elastic arms abut against the outer surface of the cylindrical wall of the plastic cylindrical body.

10. The coaxial connector as described in claim 9, characterized in that: The peripheral and top walls of the shell are made of plastic material. The upper end face of the plastic cylinder is located below the top wall. The upper end face of the plastic cylinder protrudes upward to form a protrusion within the opening in the top wall. The accommodating space extends upward through the protrusion. The protrusion has an annular inner surface that is wider at the top and narrower at the bottom. The radial dimension of the protrusion is smaller than the radial dimension of the opening.

11. The coaxial connector as described in claim 9, characterized in that: The elastic contact arm extends upward from the upper end of the retaining portion, and the elastic abutment arm bends outward from the lower end of the retaining portion, with the plate surface of the elastic abutment arm facing the bottom wall.

12. The coaxial connector as described in claim 11, characterized in that: The lower end of the plastic cylinder wall is recessed to form a retaining groove for the retaining part to be inserted upward. The elastic abutment arm includes a horizontal segment formed by bending outward from the lower end of the retaining part and an arc segment extending from one side of the horizontal segment. The arc segment of each terminal unit extends in a counterclockwise or clockwise direction, and the arc segments of several terminal units are generally arranged to form a ring structure.

13. The coaxial connector as described in claim 12, characterized in that: The lower end of the plastic cylinder wall protrudes downward to form several limiting protrusions. The horizontal segment is disposed between two of the limiting protrusions. The outer surface of the limiting protrusion in the circumferential direction is an arc surface opposite to the inner edge of the arc segment.

14. The coaxial connector as described in claim 1, characterized in that: The coaxial connector further includes a plastic cylindrical body. The bottom wall, peripheral wall, and top wall constitute the receiving cavity for housing the terminal assembly, the elastic element, and the plastic cylindrical body. The plastic cylindrical body extends through its upper end face to form an accommodating space. The terminal assembly has a holding portion fixed to the plastic cylindrical body, a contact portion protruding into the accommodating space, and an abutment portion extending downward from the lower end of the plastic cylindrical body and electrically connected to the bottom wall. The contact portion constitutes the insertion port. The elastic element is a helical spring surrounding the periphery of the cylindrical wall of the plastic cylindrical body. The helical spring includes a small-diameter portion that is circumferentially arranged and abuts against the outer surface of the cylindrical wall of the plastic cylindrical body, and a large-diameter portion with a diameter larger than the small-diameter portion that is spaced apart from the outer surface of the cylindrical wall of the plastic cylindrical body. The large-diameter portion is confined within the housing.

15. The coaxial connector as described in claim 1, characterized in that: The coaxial connector further includes a plastic cylinder, the bottom wall, the peripheral wall and the top wall forming a receiving cavity for the terminal assembly, the elastic element and the plastic cylinder, the opening being disposed in the top wall, the peripheral wall being integrally connected to the top wall and being made of plastic material, and the bottom wall being made of metal material.

Images