TWI796101B - Electric connector - Google Patents

Abstract

The present invention discloses an electrical connector including a housing, an insulator and a plurality of elastic terminals. The insulator is received in the housing, and an insertion cavity is formed between the insulator and the housing. The insulator includes a plurality of receiving grooves communicating with the insertion cavity. The elastic terminal includes a fixing portion fixed in the insulator and an elastic contact arm extending from the fixing portion. The elastic contact arm is received in the corresponding receiving groove. The elastic contact arm includes a contact portion exposed to the insertion cavity. A lever portion is arranged in the receiving groove, and the elastic contact arm is erected on the lever portion. The lever portion functions as a lever fulcrum, which can effectively avoid problems such as buckling and fracture of the elastic terminal, thereby reducing the defect rate, saving costs, improving the yield rate and prolonging the service life.

Description

electrical connector

The invention relates to the technical field of connectors, in particular to an electrical connector.

The present invention claims a priority right, the application date is March 31, 2021, and the priority right of the Chinese patent application with the application number: 202110346169.2, the entire content of which is incorporated by reference in the present invention.

Electrical connectors are widely used in electronic equipment such as communications, computers, and home appliances, and play an important role in connection and communication. Taking the known universal serial bus type A (USB Type-A) socket connector as an example, the electrical connector generally includes a housing, an insulator connected in the housing and nine terminals fixed in the insulator, wherein the The nine terminals include two pairs of differential signal terminals and a ground terminal on the top, and a pair of differential signal terminals, a power signal terminal and a ground terminal on the bottom. The casing and the insulator form an insertion interface for the plug connector to be plugged in, and the lower terminal includes an elastic portion extending into the insertion interface. However, during the long-term plugging and unplugging process, the elastic part is likely to yield and break.

The purpose of the present invention is to provide an electrical connector to solve the aforementioned technical problems.

To achieve the aforementioned object, the present invention adopts the following technical solutions:

An electrical connector comprising:

case;

an insulator, which is accommodated in the aforementioned housing and forms an insertion cavity with the aforementioned housing, and the aforementioned insulator includes a plurality of receiving grooves communicating with the aforementioned insertion cavity;

A plurality of elastic terminals, the aforementioned elastic terminal includes a fixing portion fixed in the aforementioned insulator and an elastic contact arm extending from the aforementioned fixing portion, the aforementioned elastic contact arm is accommodated in the aforementioned receiving groove, and the aforementioned elastic contact arm is provided with a contact exposed to the aforementioned insertion cavity. department;

Wherein, a lever portion is disposed in the receiving groove, and the elastic contact arm is erected on the lever portion.

As a further improved technical solution of the present invention, the aforementioned lever portion is a convex hull protruding from the bottom of the aforementioned receiving groove.

As a further improved technical solution of the present invention, the convex hull is provided with an arcuate surface in contact with the elastic contact arm.

As a further improved technical solution of the present invention, the contact point of the elastic contact arm with the protrusion is located between 1/4 and 1/3 of the elastic contact arm.

As a further improved technical solution of the present invention, the elastic contact arm bends and extends from the fixing portion, and the included angle between the fixing portion and the elastic contact arm is less than 90 degrees.

As a further improved technical solution of the present invention, the aforesaid insulator further includes an abutment portion abutting against a bend between the aforesaid fixing portion and the elastic contact arm.

As a further improved technical solution of the present invention, the aforesaid insulator includes a main body and a matching portion that is buckled on the aforesaid main body, the aforesaid main body includes a tongue plate located in the insertion cavity, the aforementioned receiving groove is provided on the aforementioned tongue plate, and the aforementioned elastic terminal The fixing part is fixed in the matching part.

As a further improved technical solution of the present invention, the aforementioned electrical connector further includes a plurality of contact terminals, the aforementioned contact terminals include flat contact portions exposed to the aforementioned insertion cavity, and the contact portions of the plurality of aforementioned elastic terminals are connected to the flat contact portions of the plurality of aforementioned contact terminals. The aforementioned tongue plate is divided into two rows and mutually dislocated.

As a further improved technical solution of the present invention, the elastic terminal further includes pins extending out of the matching portion, and the contact terminal further includes pins extending out of the main body.

As a further improved technical solution of the present invention, the aforementioned main body includes a vertical The straight part, the tail part extending backward from the upper end of the aforementioned vertical part, and the aforementioned tongue plate extending forward from the lower end of the aforementioned vertical part, the aforementioned housing includes a shielding part located around the aforementioned tongue plate and forming the aforementioned insertion cavity with the aforementioned tongue plate and The rear cover covering the aforementioned tail.

Compared with the conventional technology, the beneficial effect of the present invention is that: a lever part is provided in the storage tank, the elastic contact arm is erected on the lever part, and the lever part forms a lever fulcrum, which can effectively avoid problems such as buckling and breaking of the elastic terminal, thereby Reduce defect rate, save cost, improve yield rate and prolong service life.

1: shell

100: electrical connector

11: shielding part

111: buckle part

112: ear

12:Back cover

121: fixed feet

122: Rear cover

2: Insulator

21: socket cavity

22: storage tank

23: Leverage department

231: curved surface

24: contact part

25: Main body

251: vertical part

252: Tail

253: tongue plate

26:Coordination department

261: horizontal board

262: Riser

3: Elastic terminal

31: fixed part

311: Beam

312: front frame

313: Rear frame

32: elastic contact arm

321: contact part

33: Pin

341, 441: Grounding terminal

342, 442: Differential signal terminals

343: Power signal terminal

4: Contact terminal

41: Positioning Department

411: stem

412: Fore extension

413: Rear extensor

42: flat contact part

43: pin

Fig. 1 is the structural representation of electrical connector of the present invention;

Fig. 2 is a structural schematic diagram of another angle of Fig. 1;

Fig. 3 is a structural schematic diagram of the decomposed housing of the electrical connector of the present invention;

Fig. 4 is a structural schematic diagram of another angle of Fig. 3;

Fig. 5 is a structural schematic diagram of the main body part containing the contact terminal and the mating part containing the elastic terminal of the electrical connector of the present invention;

Fig. 6 is a structural schematic diagram of another angle of Fig. 5;

Fig. 7 is the exploded schematic diagram of Fig. 5;

Fig. 8 is an exploded schematic view of another angle of Fig. 7;

FIG. 9 is a schematic cross-sectional view of the electrical connector of the present invention.

Please refer to FIG. 1 to FIG. 4 and FIG. 9 , the present invention discloses an electrical connector 100. In one embodiment, the electrical connector 100 is a USB Type-A receptacle connector for a matching plug connector (not shown) icon) plug-in connection. The electrical connector 100 includes a housing 1 , an insulator 2 , a plurality of elastic terminals 3 and a plurality of contact terminals 4 . The insulator 2 is accommodated in the housing 1 and forms an insertion cavity 21 with the housing 1 . The insulator 1 includes a plurality of receiving grooves 22 communicating with the insertion cavity 21 . The elastic terminal 3 includes a fixed portion 31 fixed in the insulator 2 and an elastic contact arm 32 extending from the fixed portion 31. The elastic contact arm 32 is accommodated in the receiving groove 22, and the elastic contact arm 32 is provided with a The contact portion 321 of the insertion cavity. A lever part 23 is arranged in the storage tank 22, and the elastic contact arm 32 is erected on the lever part 23. The lever part 23 forms a lever fulcrum, which can effectively avoid problems such as buckling and breaking of the elastic terminal 3, thereby reducing the defective rate, saving costs, and improving Yield, prolong service life.

Please continue to refer to FIG. 9, the lever portion 23 is a convex hull protruding from the bottom of the receiving groove 22, and the convex hull is provided with an arc surface 231 in contact with the elastic contact arm 32, and the elastic contact arm 32 is elastic when the contact portion 321 is stressed. Deformation and moving contact along the arc surface 231 can avoid force concentration, thereby preventing the elastic terminal 3 from buckling, breaking, and the like. Preferably, the height of the protrusion is less than or equal to half of the depth of the receiving groove 22 , so as to ensure the leverage and the receiving effect of the elastic contact arm 32 . The contact point between the elastic contact arm 32 and the convex hull is located between 1/4 and 1/3 of the elastic contact arm 32, specifically between 1/4 and 1/3 of the direction from the fixing part 31 to the contact part 321 position, so as to ensure the elastic force of the elastic contact arm 32 and the contact effect of the contact portion 321 . The elastic contact arm 32 bends and extends from the fixed part 31, and the angle between the fixed part 31 and the elastic contact arm 32 is less than 90 degrees, such as preferably between 83 degrees and 88 degrees, which can further ensure the connection between the lever part 23 and the elastic contact arm 32. Leverage. The insulator 2 also includes an abutment portion 24 that abuts against the bend between the fixing portion 31 and the elastic contact arm 32. The end of the abutment portion 24 is arc-shaped to match the bend and protect the elastic contact. arm 32.

Specifically, referring to FIG. 5 to FIG. 9 , the insulator 2 includes a main body 25 and a matching portion 26 buckled on the main body 25 . The main body 25 is substantially Z-shaped, and includes a vertical portion 251 , a tail portion 252 extending backward from an upper end of the vertical portion 251 , and a tongue plate 253 extending forward from a lower end of the vertical portion 251 . The tongue plate 253 is located in the insertion cavity 21 , the receiving groove 22 is disposed on the tongue plate 253 , and the fixing portion 31 of the elastic terminal 3 is fixed to the mating portion 26 . The matching part 26 includes a horizontal plate 261 buckled on the tail part 252 and a vertical plate 262 buckled on the vertical part 251. The fixing part 31 of the elastic terminal 3 is fixed in the vertical plate 262, and the elastic contact arm 32 of the elastic terminal 3 is on the vertical The plate 262 is buckled by the vertical portion 251 and stored in the receiving groove 22 and mounted on the lever portion 23 , and the contact portion 321 at the free end of the elastic contact arm 32 is located in the insertion cavity 21 . The included angle between the elastic contact arm 32 and the fixed part 31 can be originally less than 90 degrees, or the lever part 23 can be used to keep the included angle smaller than 90 degrees, or there can be both factors. The elastic terminal 3 further includes a prong 33 extending out of the horizontal plate 261 of the mating portion 26 . Specifically, the fixing part 31 is roughly in the shape of an inverted U, which includes a beam part 311 bent from one end of the beam part 311 The extended front frame portion 312 and the rear frame portion 313 are bent and extended from the other end of the beam portion 311 . The beam portion 311 is fixed in the horizontal plate 261 and barbs are provided on both sides of the beam portion 311 to strengthen the fixation with the horizontal plate 261 . The front frame portion 312 is fixed in the vertical plate 262 , and the rear frame portion 313 is fixed in the horizontal plate 261 . The elastic contact arm 32 is bent and extended from the front frame portion 312 , and the included angle is less than 90 degrees. The pins 33 are obtained by extending from the rear frame portion 313 to the horizontal plate 261 . The inverted U-shaped fixing part 31 can firmly install the elastic terminal 3 in the insulator 2, and ensure the elasticity of the elastic contact arm 32 and the leverage with the lever part 23; and the length of the front frame part 312 is greater than that of the rear frame part 313 The length makes the elastic terminal 3 suitable for being installed on the edge of a circuit board (not shown) to reduce the height of the electrical connector 100 on the circuit board, which is beneficial to miniaturization and thinning.

The contact terminal 4 includes a positioning portion 41 fixed in the main body 25 , a flat contact portion 42 located at one end of the positioning portion 41 , and a pin 43 extending out of the main body. The flat contact portion 42 is disposed on a free end of the tongue plate 253 and exposed to the insertion cavity 21 . The positioning portion 41 is fixed in the vertical portion 251 and the tongue plate 253 , and the pin 43 extends out of the tail portion 252 . Specifically, the positioning part 41 includes a vertically arranged rod part 411 , a forward extension part 412 bent from the lower end of the rod part 411 , and a rear extension part 413 bent and extended from the upper end of the rod part 411 . The rod part 411 is fixed in the vertical part 251, the forward extension part 412 is fixed in the tongue plate 253, the flat contact part 42 is arranged at the end of the forward extension part 412, the rear extension part 413 is fixed in the tail part 252, and the pin 43 is automatically The rear extension part 413 is bent and extended. The positioning part 41 is firmly installed in the insulator 2, and barbs are provided on both sides of the rear extension part 413 to strengthen the fixation. The contact portions 321 of the plurality of elastic terminals 3 and the flat contact portions 42 of the plurality of contact terminals 4 are divided into two rows on the tongue plate 253 and arranged in dislocation with each other. The pins 33 of the plurality of elastic terminals 3 and the pins 43 of the plurality of contact terminals 4 are divided into two rows and are mutually offset. Tongue plate 253 is located at the lower end of vertical portion 251 and extends forward, and tail portion 252 is located at the upper end of vertical portion 251 and extends backward. Pin 33 and pin 43 extend downward from tail portion 252 for plugging into a circuit board (not shown). On a carrier such as a circuit board, the position of the pin 33 and the pin 43 is higher than that of the tongue plate 253, which can reduce the height of the electrical connector 100 on a carrier such as a circuit board, does not occupy the height and area of the circuit board, and is beneficial to miniaturization and thinness change.

Referring to FIG. 1 to FIG. 4 and FIG. 9 , the casing 1 includes a shielding portion 11 and a rear cover 12 . The shielding portion 11 is located around the tongue plate 253 and forms an insertion cavity 21 with the tongue plate 253 , and the rear cover 12 covers the tail portion 252 . The shielding part 11 is buckled on the vertical part 251 and extends forward and hangs on the tongue plate 253, the shielding part 11 includes a plurality of buckling parts 111 extending into the insertion cavity 21 and outwardly bent ear parts 112. The upper, lower, left and right sides of the shielding part 11 are provided with buckling parts 111. Available as suspended or unsuspended elastomers. The ear portions 112 are located on the left and right sides and are used for fixing when the electrical connector 100 is mounted on a carrier such as a circuit board. The back cover 12 is used to shield the pin 33 of the elastic terminal 3 and the pin 43 of the contact terminal 4 . Both sides of the rear cover 12 are bent downwards with fixing legs 121 , and the rear side of the rear cover 12 is bent downwards with a rear cover 122 . The fixing feet 121 and the ears 112 have the same height and the same function, and the rear cover 122 is used for shielding and protection.

Please refer to Figure 7 and Figure 8, the flexible terminal 3 and the contact terminal 4 conform to the USB 3.0 transmission protocol, there are four flexible terminals 3, which are a ground terminal 341, a pair of differential signal terminals 342 and a power signal terminal 343, A pair of differential signal terminals 342 are located in the middle, and ground terminals 341 and power signal terminals 343 are located on both sides. There are five contact terminals 4 , which are a ground terminal 441 located in the middle and two pairs of differential signal terminals 442 located on both sides of the ground terminal 441 .

Referring to FIGS. 1 to 9, the steps of assembling the electrical connector 100 are as follows:

Step 1: Provide four elastic terminals 3 connected by tapes (not shown), injection mold the mating portion 26 at the fixing portion 31, and suspend the elastic contact arm 32 to expose the pin 33; then break off the tape.

Step 2: Provide five contact terminals 4 connected by the main material strip and the auxiliary material strip, inject the main body part 25 at the positioning part 41, and expose the flat contact part 42 and expose the pin 43; then fold off the main material strip and auxiliary tape.

Step 3, buckle the matching part 26 on the main body part 25 to form the insulator 2 accommodated in the elastic terminal 3 and the contact terminal 4; the elastic contact arm 32 is accommodated in the receiving groove 22 and the contact part 321 protrudes out of the tongue plate 253, and four contacts The part 321 and the five flat contact parts 42 are distributed front and back on the same side of the tongue plate 253 and arranged in a dislocation manner.

Step 4, provide the casing 1 and pre-assemble the casing 1 on the insulator 2 .

Step five, riveting the housing 1 to complete the assembly of the housing 1 and the insulator 2 .

Step six, inspection, laser engraving, and packaging.

Wherein step 1 and step 2 can be exchanged or carried out simultaneously.

Compared with the conventional insulator, when the planar structure is adopted, the elastic terminal and the insulating system face to the plane, so that the force of the elastic terminal is all concentrated at the junction of the insulator and the elastic terminal when plugging and unplugging, and the elastic terminal is easy to be damaged during the long-term plugging and unplugging process. Terminal buckled, broken. The electrical connector of the present invention has elastic terminals, and the bending angle of the elastic terminals is less than 90 degrees. When the insulator uses a lever part, it will act as a lever-type fulcrum for the elastic terminals, which can prevent the elastic terminals from buckling, breaking, etc., thereby reducing the defective rate , Save cost, improve yield rate and prolong service life.

The above embodiments are only used to illustrate the present invention rather than limit the technical solutions described in the present invention. The understanding of this description should be based on those skilled in the art, such as "front", "rear", "left", " "right", "up", "down" and other directional descriptions, although this specification has described the present invention in detail with reference to the aforementioned embodiments, those of ordinary skill in the art should understand that those skilled in the art The present invention can still be modified or equivalently replaced, and all technical solutions and improvements that do not deviate from the spirit and scope of the present invention should be covered within the patent scope of the present invention.

22: storage tank

23: Leverage Department

231: curved surface

24: contact part

25: Main body

26:Coordination department

311: Beam

312: front frame

313: Rear frame

32: elastic contact arm

321: contact part

33: Pin

42: flat contact part

43: pin

Claims (8)

An electrical connector, wherein it includes: a housing; an insulator, which is accommodated in the housing and forms an insertion cavity with the housing, the insulator includes a plurality of receiving grooves communicating with the insertion cavity; a plurality of elastic terminals, The elastic terminal includes a fixing portion fixed in the insulator and an elastic contact arm extending from the fixing portion, the elastic contact arm is accommodated in the receiving groove, and the elastic contact arm is provided with a contact portion exposed to the insertion cavity; wherein, A lever portion is provided in the receiving groove, and the elastic contact arm is erected on the lever portion; the elastic contact arm is bent and extended from the fixed portion, and the angle between the fixed portion and the elastic contact arm is less than 90 degrees, and the insulator also includes The abutting portion abuts against the bending position between the aforementioned fixing portion and the elastic contact arm. The electrical connector as claimed in claim 1, wherein the lever portion is a protrusion protruding from the bottom of the receiving groove. The electrical connector as claimed in claim 2, wherein the protrusion is provided with an arc surface which is in contact with the elastic contact arm. The electrical connector according to claim 2, wherein the contact point of the elastic contact arm with the protrusion is located between 1/4 to 1/3 of the elastic contact arm. An electrical connector, wherein it includes: a housing; an insulator, which is accommodated in the housing and forms an insertion cavity with the housing, and the insulator includes a plurality of receiving grooves communicating with the insertion cavity; A plurality of elastic terminals, the aforementioned elastic terminal includes a fixing portion fixed in the aforementioned insulator and an elastic contact arm extending from the aforementioned fixing portion, the aforementioned elastic contact arm is accommodated in the aforementioned receiving groove, and the aforementioned elastic contact arm is provided with a contact exposed to the aforementioned insertion cavity. part; wherein, a lever part is provided in the aforementioned receiving groove, and the aforementioned elastic contact arm is erected on the aforementioned lever part; the aforementioned insulator includes a main body part and a matching part buckled on the aforementioned main body part, and the aforementioned main body part includes a tongue plate located in the insertion cavity , the aforesaid receiving groove is disposed on the aforesaid tongue plate, and the fixing part of the aforesaid elastic terminal is fixed in the aforesaid mating part. The electrical connector according to claim 5, wherein the aforementioned electrical connector further includes a plurality of contact terminals, the aforementioned contact terminals include flat contact portions exposed to the aforementioned insertion cavity, the contact portions of the plurality of aforementioned elastic terminals and the plurality of aforementioned contact terminals The flat-plate contact parts are divided into two rows on the tongue plate and arranged in dislocation with each other. The electrical connector according to claim 6, wherein the elastic terminal further includes pins extending out of the mating portion, and the contact terminal further includes pins extending out of the main body. The electrical connector according to claim 5, wherein the main body includes a vertical portion, a tail portion extending backward from the upper end of the vertical portion, and a tongue plate extending forward from the lower end of the vertical portion, and the housing includes A shielding portion located around the tongue plate and forming the insertion cavity with the tongue plate and a rear cover covering the tail portion.

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