CN113991373A

CN113991373A - Coaxial connector

Info

Publication number: CN113991373A
Application number: CN202111389512.8A
Authority: CN
Inventors: 朱昭晖; 张建; 王佳文
Original assignee: Qidong Qianshuo Electronic Co Ltd
Current assignee: Qidong Qianshuo Electronic Co Ltd
Priority date: 2021-11-22
Filing date: 2021-11-22
Publication date: 2022-01-28

Abstract

The invention discloses a coaxial connector, which comprises an insulating body, and a fixed terminal and a movable terminal which are fixedly held on the insulating body, wherein the insulating body extends along the longitudinal direction and is provided with an accommodating cavity for a rod-shaped probe to be inserted into, the fixed terminal is provided with a fixed part fixedly held on one longitudinal side of the insulating body and a contact part extending from the fixed part to the accommodating cavity, and the movable terminal is provided with a fixed part fixedly held on the other longitudinal side of the insulating body and an elastic arm extending into the accommodating cavity from the two transverse ends of the fixed part. The free end centre gripping of elastic arm is in the horizontal both sides of contact site, and every elastic arm all is equipped with the guide part that is located the interlude, the guide part upwards just extends to the slope outwards from the topside of elastic arm to guide the insertion of probe. The elastic arm extends in the longitudinal direction to ensure that the elastic arm has enough elastic force, and the elastic arm only moves in the transverse direction without occupying space in the height direction, so that the coaxial connector can be miniaturized.

Description

Coaxial connector

Technical Field

The present invention relates to a coaxial connector, and more particularly, to a miniaturized coaxial connector.

Background

Coaxial connectors are one of the most common components in electronic devices such as cellular phones, notebook computers, and the like. With the development demand of light, thin and small electronic devices, how to realize miniaturization and even miniaturization of coaxial connectors becomes one of the bottlenecks that restrict the miniaturization development of electronic devices. The conventional coaxial connector includes at least a conductive housing, a movable terminal and a stationary terminal functioning as a switch, an insulating body, and the like, and is assembled by fitting the respective components to each other. The movable terminal has a certain elastic support and is mutually overlapped with the static terminal under the action of the elastic force of the movable terminal, and when the probe is inserted and combined, the movable terminal moves along the height direction under the action of the thrust of the probe and is disconnected from the static terminal; after the probe is removed, the movable terminal is restored to a state of being overlapped with the fixed terminal under the action of the elastic support of the movable terminal.

Generally, the component that causes the coaxial connector to occupy a large space is the switching mechanism, and the smaller the switching mechanism, the smaller the insulating body and the conductive shell that function as a support or shield can be made, and vice versa. On one hand, in order to ensure the switching function, the movable terminal needs to be bent to form a certain elastic arm, so that supporting force for ensuring the electric connection between the movable terminal and the fixed terminal is provided, and the restoring elastic force for restoring the movable terminal to the original position after the probe is removed is provided, therefore, in order to provide enough elastic force and achieve a certain service life, the force arm of the elastic arm of the movable terminal needs to be long enough, the elastic height is as high as possible, and the structure is difficult to miniaturize; on the other hand, in order to provide a certain space for the switching mechanism, the insulating body must provide a large accommodation space, which also makes it difficult to miniaturize the structure.

It is therefore desirable to provide a new coaxial connector that overcomes the above-mentioned drawbacks.

Disclosure of Invention

The invention aims to provide a miniaturized coaxial connector, which can improve the durability of a movable terminal and realize the miniaturization of the coaxial connector.

In order to achieve the purpose, the invention adopts the following technical scheme: a coaxial connector comprises an insulating body, a fixed terminal and a movable terminal, wherein the fixed terminal and the movable terminal are fixedly arranged on the insulating body, the insulating body extends along the longitudinal direction and is provided with an accommodating cavity for a rod-shaped probe to be inserted into, the fixed terminal is provided with a fixed part fixedly arranged on one longitudinal side of the insulating body and a contact part extending from the fixed part towards the accommodating cavity along the longitudinal direction, and the movable terminal is provided with a fixed part fixedly arranged on the other longitudinal side of the insulating body and an elastic arm extending into the accommodating cavity from the two transverse ends of the fixed part. The free end of the elastic arm is clamped at the two transverse sides of the contact part, and each elastic arm is provided with a guide part located at the middle section, and the guide part is formed by upward and outward inclined extension of the top edge of the elastic arm so as to guide the insertion of the probe.

In a preferred embodiment, the insulating body includes a lower insulator and an upper insulator overlapped on the lower insulator, the lower insulator is provided with a rectangular main body portion, the upper insulator is provided with an annular portion at an upper end and a connecting portion at a lower end, and the main body portion and the connecting portion cooperate to form the accommodating cavity.

In a preferred embodiment, the upper insulator is provided with a plug hole penetrating through a top surface of the annular portion, the plug hole is communicated with the accommodating cavity for inserting the probe, and the guide portion of the elastic arm is located right below the plug hole.

In a preferred embodiment, the lower insulator is provided with protruding portions located at four corners of the main body portion, the protruding portions are formed to protrude upward from a top surface of the main body portion, the lower insulator is provided with notches located at the four corners of the connecting portion, and the protruding portions are correspondingly received in the notches when the lower insulator is fitted to the upper insulator.

In a preferred embodiment, the lower insulator is provided with a boss protruding upwards from the top surface of the main body, the bottom surface of the connecting portion is attached to the top surface of the contact portion, the top surface of the boss is attached to the bottom surface of the contact portion, so that the contact portion is clamped and fixed in the insulating body, and the two lateral sides of the boss do not exceed the two lateral sides of the contact portion.

In a preferred embodiment, the pair of elastic arms is provided with an extending portion extending from the holding portion in a longitudinal direction, an abutting portion located at a free end, and a curved portion connecting the extending portion and the abutting portion, the abutting portion abuts against both lateral sides of the contact portion, and the curved portions of the pair of elastic arms are formed by bending toward each other.

In a preferred embodiment, the shortest distance between the bent portions of the pair of the elastic arms is smaller than the diameter of the probe, and the guide portion is formed to extend obliquely upward and outward from the top edge of the bent portion.

In a preferred embodiment, the coaxial connector includes a metal shell covering the outside of the insulating body, the metal shell is provided with an annular shielding portion covering a peripheral wall of the annular portion, a top surface shielding portion covering a top surface of the connecting portion, and a side surface shielding portion covering lateral side surfaces of the connecting portion and the main body portion, and the top surface of the annular portion is exposed to the outside of the metal shell.

In a preferred embodiment, the metal shell is provided with a holding portion bent inward from a bottom edge of the side shielding portion, and the holding portion is attached to a bottom surface of the main body portion, so that the metal shell is held on the insulating body.

In a preferred embodiment, the fixed terminal is provided with a welding leg extending out of the insulating body from the fixed portion in the longitudinal direction, the movable terminal is provided with a welding portion extending out of the insulating body from the fixed portion in the longitudinal direction, and the welding leg and the welding portion are located in the same plane.

Compared with the prior art, the invention has the following beneficial effects: the free end of each elastic arm is clamped at the two transverse sides of the contact part, each elastic arm is provided with a guide part located in the middle section, and the guide parts are formed by upwards and outwards obliquely extending from the top edge of each elastic arm so as to guide the insertion of the probe. When the probe is inserted, the probe contacts the guide part and pushes against the guide part to push the elastic arm with the guide part to expand outwards along the transverse direction, so that the connection between the movable terminal and the fixed terminal is disconnected; after the probe is withdrawn, the elastic arm is restored to the overlapping state with the fixed terminal by its own elastic force, and thus it is known that the elastic arm of the movable terminal is extended in the longitudinal direction to ensure sufficient elastic force and durability of the elastic arm, and the elastic arm is moved only in the transverse direction without occupying a space in the height direction, thereby enabling miniaturization of the coaxial connector.

Drawings

Fig. 1 is a perspective view of a coaxial connector according to a preferred embodiment of the present invention.

Fig. 2 is an exploded schematic view of the coaxial connector shown in fig. 1.

Fig. 3 is a top view of the coaxial connector shown in fig. 1.

Fig. 4 is a sectional view of the coaxial connector shown in fig. 3 taken along the direction a-a.

Fig. 5 is a schematic perspective view of the coaxial connector shown in fig. 2 when the movable terminal and the fixed terminal are sandwiched therebetween.

Fig. 6 is a schematic perspective view of the movable terminal and the fixed terminal shown in fig. 5 when they are not sandwiched.

Fig. 7 is a perspective view of the movable terminal and the fixed terminal shown in fig. 6 at another angle when they are not sandwiched.

Detailed Description

Referring to fig. 1-4, a coaxial connector 100 for mounting on a printed circuit board (not shown) and mating with a probe (not shown) in the form of a rod is disclosed in accordance with a preferred embodiment of the present invention. The coaxial connector 100 includes an insulating housing 10, a fixed terminal 20 and a movable terminal 30 fixed in the insulating housing 10, and a metal shell 40 covering the outside of the insulating housing 10, wherein the insulating housing 10 extends along a longitudinal direction and is provided with an accommodating cavity 13 opened upward for the insertion of the probe.

The insulating body 10 includes a lower insulator 11 and an upper insulator 12 overlapping the lower insulator 11, and the receiving cavity 13 is formed between the lower insulator 11 and the upper insulator 12. Specifically, the lower insulator 11 is provided with a rectangular main body portion 110, the upper insulator 12 is provided with an annular portion 121 at an upper end and a connecting portion 122 at a lower end, and the main body portion 110 and the connecting portion 122 are engaged with each other to form the receiving cavity 13. Meanwhile, the upper insulator 12 is provided with a plug hole 14 penetrating through the top surface of the annular part 121, and the plug hole 14 is communicated with the accommodating cavity 13 for the insertion of the probe.

The lower insulator 11 is further provided with protrusions 111 at four corners of the body 110 and bosses 112 protruding upward from the top surface of the body 110, and the protrusions 111 are formed to protrude upward from the top surface of the body 110. The lower insulator 12 is provided with notches 123 at four corners of the connecting portion 122, and when the lower insulator 11 is fitted to the upper insulator 12, the protrusions 111 are correspondingly received in the notches 123, so that the lower insulator 11 and the upper insulator 12 are engaged and connected together.

Referring to fig. 5 to 7, the fixed terminal 20 is made of a thin metal plate and is provided with a fixed portion 21 fixed on one side of the insulating housing 10 in the longitudinal direction, a contact portion 22 extending from the fixed portion 21 toward the accommodating cavity 13 in the longitudinal direction, and a welding leg 23 extending from the fixed portion 21 out of the insulating housing 10 in the longitudinal direction. The bottom surface of the connecting portion 122 of the upper insulator 12 is attached to the top surface of the contact portion 22, and the top surface of the boss 112 of the lower insulator 11 is attached to the bottom surface of the contact portion 22, so as to clamp and fix the contact portion 22 in the insulating body 10; meanwhile, both lateral sides of the boss 112 of the lower insulator 11 do not exceed both lateral sides of the contact portion 22.

The movable terminal 30 is made of a thin metal plate and is provided with a holding portion 31 held at the other side of the insulating body 10 in the longitudinal direction, a pair of elastic arms 32 extending into the accommodating cavity 13 from both ends of the holding portion 31 in the transverse direction, and a welding portion 33 extending from the holding portion 31 in the longitudinal direction out of the insulating body 10, wherein the welding portion 33 and the welding leg 23 are located in the same plane. The free ends of the pair of resilient arms 32 are held at both lateral sides of the contact portion 22, and each resilient arm 32 is provided with a guide portion 321 located at the middle section, the guide portion 321 is formed extending obliquely upward and outward from the top edge of the resilient arm 32, and the guide portion 321 is located directly below the insertion hole 14 to guide the insertion of the probe. When the probe is inserted, the probe contacts the guiding portion 321 and pushes against the guiding portion 321 to push the pair of elastic arms 32 with the guiding portion 321 to expand outward in the transverse direction, so as to disconnect the connection between the movable terminal 30 and the fixed terminal 20; after the probe is withdrawn, the elastic arm 32 is restored to the overlapping state with the fixed terminal 20 by its own elastic force.

Specifically, the elastic arm 32 is provided with an extending portion 34 extending from the holding portion 31 in the longitudinal direction, an abutting portion 35 located at the free end, and a curved portion 36 connecting the extending portion 34 and the abutting portion 35, and the guiding portion 321 is formed extending obliquely upward and outward from the top edge of the curved portion 36. The abutting portions 35 abut against both lateral sides of the contact portion 22, and since both lateral sides of the boss 112 do not extend beyond both lateral sides of the contact portion 22, the abutting portions 35 of the elastic arms 32 do not abut against the boss 112 between both lateral sides of the contact portion 22. The bent portions 36 of the pair of elastic arms 32 are bent toward each other, and the shortest distance between the bent portions 36 is smaller than the diameter of the probe, so that the guide portion 321 can guide the insertion of the probe and force the elastic arms 32 to expand in the transverse direction when the probe is inserted.

As shown in fig. 2, the metal case 40 includes an annular shielding portion 41 covering the peripheral wall of the annular portion 121, a top surface shielding portion 42 covering the top surface of the connecting portion 122, and a side surface shielding portion 43 covering the lateral side surfaces of the connecting portion 122 and the main body portion 110, and the top surface of the annular portion 121 is exposed to the outside of the metal case 40. Meanwhile, the metal shell 40 is further provided with a holding portion 44 bent inward from the bottom edge of the side shielding portion 43, and the holding portion 44 is attached to the bottom surface of the main body portion 110, so that the metal shell 40 is held on the insulating body 10.

In the present invention, the free ends of the pair of elastic arms 32 are held at both lateral sides of the contact portion 22, and each elastic arm 32 is provided with a guide portion 321 at the middle section, the guide portion 321 being formed extending obliquely upward and outward from the top edge of the elastic arm 32 to guide the insertion of the probe. When the probe is inserted, the probe contacts the guiding portion 321 and pushes against the guiding portion 321 to push the pair of elastic arms 32 with the guiding portion 321 to expand outward in the transverse direction, so as to disconnect the connection between the movable terminal 30 and the fixed terminal 20; after the probe is withdrawn, the elastic arm 32 is restored to the overlapping state with the fixed terminal 20 by its own elastic force, and thus it is known that the elastic arm 32 of the movable terminal 30 is extended in the longitudinal direction to ensure sufficient elastic force and durability of the elastic arm 32, and the elastic arm 32 is moved only in the transverse direction without occupying a space in the height direction, so that miniaturization of the coaxial connector 100 can be achieved.

In summary, the above is only a preferred embodiment of the present invention, and should not be limited to the scope of the present invention, and all the equivalent changes and modifications made by the claims and the specification of the present invention should still fall within the scope of the present invention.

Claims

1. A coaxial connector comprises an insulating body, a fixed terminal and a movable terminal, wherein the fixed terminal and the movable terminal are fixedly held on the insulating body, the insulating body extends along the longitudinal direction and is provided with an accommodating cavity for a rod-shaped probe to be inserted into, the fixed terminal is provided with a fixed part fixedly held on one longitudinal side of the insulating body and a contact part extending from the fixed part towards the accommodating cavity along the longitudinal direction, and the movable terminal is provided with a fixed part fixedly held on the other longitudinal side of the insulating body and an elastic arm extending into the accommodating cavity from the two transverse ends of the fixed part; the method is characterized in that: the free end of the elastic arm is clamped at the two transverse sides of the contact part, and each elastic arm is provided with a guide part located at the middle section, and the guide part is formed by upward and outward inclined extension of the top edge of the elastic arm so as to guide the insertion of the probe.

2. The coaxial connector of claim 1, wherein: the insulating body comprises a lower insulator and an upper insulator overlapped on the lower insulator, the lower insulator is provided with a rectangular main body part, the upper insulator is provided with an annular part at the upper end and a connecting part at the lower end, and the main body part and the connecting part are matched to form the accommodating cavity.

3. The coaxial connector of claim 2, wherein: the upper insulator is provided with a plug hole penetrating through the top surface of the annular part, the plug hole is communicated with the accommodating cavity for the insertion of the probe, and the guide part of the elastic arm is positioned right below the plug hole.

4. The coaxial connector of claim 3, wherein: the lower insulator is provided with protruding parts positioned at four top corners of the main body part, the protruding parts protrude upwards from the top surface of the main body part, the lower insulator is provided with notches positioned at the four top corners of the connecting part, and when the lower insulator is matched with the upper insulator, the protruding parts are correspondingly accommodated in the notches.

5. The coaxial connector of claim 2, wherein: the insulator is equipped with certainly the top surface of main part is the protruding boss of stretching upwards, the bottom surface of connecting portion laminate in the top surface of contact site, the top surface of boss laminate in the bottom surface of contact site, in order to incite somebody to action the contact site centre gripping is fixed in the insulator body, just the horizontal both sides of boss do not surpass the horizontal both sides of contact site.

6. The coaxial connector of claim 2, wherein: the elastic arms are arranged in a pair and are provided with extending parts extending from the fixing part along the longitudinal direction, abutting parts located at free tail ends and bending parts connecting the extending parts and the abutting parts, the abutting parts abut against the two transverse sides of the contact part, and the bending parts of the elastic arms are formed by bending in opposite directions.

7. The coaxial connector of claim 6, wherein: the shortest distance between the bent portions of the pair of the elastic arms is smaller than the diameter of the probe, and the guide portion is formed to extend obliquely upward and outward from the top edge of the bent portions.

8. The coaxial connector of claim 2, wherein: the coaxial connector comprises a metal shell covering the outer side of the insulating body, the metal shell is provided with an annular shielding part covering the peripheral wall of the annular part, a top surface shielding part covering the top surface of the connecting part and a side surface shielding part covering the transverse side surfaces of the connecting part and the main body part, and the top surface of the annular part is exposed out of the metal shell.

9. The coaxial connector of claim 8, wherein: the metal shell is provided with a clamping part which is bent inwards from the bottom edge of the side shielding part, and the clamping part is attached to the bottom surface of the main body part, so that the metal shell is clamped on the insulating body.

10. The coaxial connector of claim 1, wherein: the fixed terminal is provided with a welding pin which longitudinally extends out of the insulating body from the fixed part, the movable terminal is provided with a welding part which longitudinally extends out of the insulating body from the fixed part, and the welding pin and the welding part are positioned in the same plane.