CN202564657U - Cable connector - Google Patents

Abstract

A cable connector includes a mating circuit board; a cable; the first shell is provided with a first inner shell and a first outer shell, the first inner shell is formed on the periphery of a welding point of the connecting section of the cable and the butt joint circuit board in an cladding mode, and the first outer shell is formed on the periphery of the first inner shell in an cladding mode and provided with a butt joint part located in the front, a combining part located in the rear and a containing groove located in the upper surface, wherein the front end of the containing groove is closed, and the rear end of the containing groove is open; the second shell is provided with a second inner shell and a second outer shell, the second inner shell is formed on the periphery of the cable in an cladding mode so as to fix the outgoing direction and is provided with a horizontal combining part and a bending extending part, the horizontal combining part is matched with the combining part of the first outer shell, the bending extending part is formed on the periphery of the bending extending section of the cable in an cladding mode, and the second outer shell is formed on the periphery of the second inner shell in an cladding mode; and a buckling elastic sheet which is inserted from back to front and is clamped and fixed in the accommodating groove of the first shell. The utility model discloses structural strength is better, and it is also comparatively simple and convenient to make and assemble.

Description

cable connector

technical field

The utility model relates to a cable connector, in particular to a shell structure in the cable electrical connector.

Background technique

The cable connector is developing toward miniaturization, so the problem of insufficient assembly space is often encountered when assembling the holding components (such as buckle elements, etc.) into the insulating housing of the cable connector. For example, the previous Chinese patent ZL200820009514.3 discloses a cable connector, which includes: an insulating housing, a plurality of conductive parts are provided at the front end, and cables electrically connected to these conductive parts are provided at the rear end; A chute extending along the front and rear direction is provided on one side of the insulating housing, a guide groove is provided on both sides of the chute, and a stopper is arranged in the chute; and a chute installed on the insulating housing A buckle element, the buckle element includes a base, an elastic buckle extending from one end of the base and extending from one end of the base, and a pressing portion extending from the other end of the elastic buckle, the base of the The two sides are correspondingly fixed in the guide grooves on both sides of the chute of the insulating housing; the stopper of the insulating housing is provided with a first slope on the side facing the rear end; a positioning elastic piece extends downward from the base of the buckle element; The positioning elastic piece has a movable end that can elastically move up and down relative to the base, and the movable end of the positioning elastic piece abuts against the first inclined surface of the stopper of the insulating housing, so as to prevent the buckle element from sliding forward and disengaging from the insulating shell. case. Although this buckle element fixing structure can reduce the overall length of the insulating housing and is beneficial to product miniaturization, it will reduce the upper tongue plate because it needs to open an open chute at the front end of the connector to assemble the buckle element. The structural strength of the upper lingual plate is easier to break. It can be seen that it is necessary to further improve the structure of the existing cable connector.

Utility model content

The technical problem to be solved by the utility model is to overcome the above-mentioned deficiencies in the prior art, and propose a cable connector, which conforms to the development direction of the miniaturization of the cable connector, has better structural strength, and is relatively easy to manufacture and assemble. easy.

The utility model proposes a cable connector aiming at the above-mentioned technical problems, which includes a pair of docking circuit boards, with several pairs of contact points at the front and several welding points at the rear; a cable with a connecting section and A bent extension section is bent upward from the rear end of the connection section, and the front end of the connection section is correspondingly welded on the welding point of the butted circuit board; it also includes a first shell, which includes a first an inner shell and a first outer shell, the first inner shell is overmolded on the outer periphery of the welding point between the connecting section of the cable and the butted circuit board, the first outer shell is overmolded on the outer periphery of the first inner shell again, and It has a docking portion at the front, a joint portion at the rear, and an accommodating groove on the upper surface with a closed front end and an open rear end; a second housing, which includes a second inner shell and a second outer shell, The second inner shell is overmolded on the outer periphery of the bent extension section of the cable to fix the outgoing direction, and has a horizontal joint portion and a bent extension portion, the horizontal joint portion is in contact with the joint portion of the first outer shell Matching, the bending extension part is overmolded on the outer periphery of the bending extension section of the cable, the second outer shell is overmolded on the outer periphery of the second inner shell again; and a buckle elastic piece is provided along the horizontal direction with A plurality of fastening protrusions, the fastening elastic piece is inserted and fastened in the accommodating groove of the first shell from the back to the front.

The first inner shell and the second inner shell are overmolded with materials with lower molding pressure and temperature, and the first outer shell and the second outer shell are overmolded with materials with higher molding pressure and temperature.

The first inner shell and the second inner shell are made of PE, and the first outer shell and the second outer shell are made of PBT or ABS.

The joint part of the first outer shell is provided with a concave and uneven engaging structure, and the second inner shell is combined with the engaging structure of the first outer shell.

The buckling elastic piece includes a base and an elastic buckle formed by reversely bending and extending the front end of the base. The two sides of the base protrude horizontally outwards from the above-mentioned multiple locking protrusions. The solid protruding part is correspondingly clamped and fixed in the accommodating groove of the first shell.

The buckling elastic piece further includes a pressing portion extending from the elastic buckle portion and a tail portion extending from the pressing portion, and a limiting portion protrudes outward from both sides of the tail portion; on the first shell The accommodating groove includes a first mating groove for correspondingly fastening and accommodating the base of the buckling elastic piece and a second fitting groove for correspondingly accommodating the limit portion of the buckling elastic piece and allowing the tail of the buckling elastic piece to It moves up and down.

The second housing also has a horizontal joint and a bent extension extending vertically upward from the horizontal joint, the accommodating groove is opposite to the bent extension of the second housing, and the second housing The front-rear distance between the front surface of the bent extension part and the rear end of the accommodating groove is smaller than the length of the buckling elastic piece along the front-rear direction.

Both sides of the docking circuit board are respectively provided with a positioning hole, and the first inner shell and the first outer shell are formed with corresponding positioning holes and communicate with the positioning holes of the docking circuit board.

The first outer shell includes a body covering the outer periphery of the first inner shell, an upper tongue plate and a lower tongue plate extending forward from the front end of the body, and the docking circuit board protrudes forward from the first The body of the shell is located between the upper tongue plate and the lower tongue plate.

The first shell also includes a protruding portion extending backward from the middle of the rear end of the body, and the joint portion extends backward from the body and includes two parts that are recessed on both sides of the protruding portion, each Some of them are provided with concave and uneven occlusal structures.

Compared with the prior art, the beneficial effects of the cable connector of the present utility model include: by forming a first shell first, and forming an accommodating groove with an open rear end on the first shell, after the buckle The shrapnel is inserted and fixed into the accommodating groove from the back to the front, and then a second shell is formed at the rear end of the first shell. This cable connector does not need to be installed on the upper tongue plate as in the prior art. The channel with an open front end has better structural strength and is easier to manufacture and assemble.

Description of drawings

Fig. 1 is a perspective view of a preferred embodiment of the cable connector of the present invention.

Fig. 2 is a front view of the preferred embodiment.

Fig. 3 is a sectional view along Z-Z direction in Fig. 2 .

Fig. 4 and Fig. 5 are three-dimensional exploded views of two different viewing angles of the preferred embodiment.

Fig. 6 is a three-dimensional exploded view of the docking circuit board, the cable, the first housing and the retaining elastic piece in this preferred embodiment.

Fig. 7 and Fig. 8 are further three-dimensional exploded views of two different viewing angles of the preferred embodiment.

Wherein, the reference signs are explained as follows:

1 docking circuit board

11 pairs of contact points

12 welding points

16 positioning holes

2 cables

21 connection section

22 bend extension

3 first inner shell

31 body

32 upper sealing plate

33 lower sealing plate

36 positioning holes

4 first shell

41 docking part

42 junction

421 Occlusal structure

43 storage slots

431 first mating slot

432 second mating slot

44 upper surface

45 protrusions

46 positioning holes

47 Ontology

48 tongue plate

49 lower lingual plate

5 buckle shrapnel

51 base

511 clamping protrusion

52 elastic buckle part

53 pressing part

54 Tail

541 limit department

6 second inner shell

61 horizontal junction

62 bend extension

7 second shell

71 horizontal joints

72 bend extension

73 front surface

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further elaborated.

Referring to Fig. 1 to Fig. 8, a preferred embodiment of the cable connector of the present invention includes: a mating circuit board 1; a cable 2; a first shell, which includes a first inner shell 3 and a first An outer shell 4 ; a fastening elastic piece 5 ; a second shell, which includes a second inner shell 6 and a second outer shell 7 .

Referring to Fig. 7 and Fig. 8, the docking circuit board 1 includes several pairs of contact points 11 arranged at its front part, that is, the butt joint end, and several welding points 12 arranged at its rear part; A positioning hole 16 is provided.

The cable 2 is L-shaped and includes several conductive wires. Each conductive wire has a connecting section 21 and a bent extension section 22 bent vertically upward from the rear end of the connecting section 21 . The front end of the connecting section 21 is correspondingly welded on the welding point 12 at the rear of the docking circuit board 1 .

Referring to Fig. 6, Fig. 7 and Fig. 8, the first inner shell 3 is made of PE (polyurethane polyurethane), and it is overmolded at the welding point between the connection section 21 of the cable 2 and the docking circuit board 1 12 Periphery, to prevent external force from damaging the connection, among them, the pressure and temperature of PE material injection molding are low, which is beneficial to reduce the damage to the connection caused by the molding process. The first inner shell 3 has a main body 31 covering the connecting section 21 of the cable 2 and an upper sealing plate 32 and a lower sealing plate 33 extending forward from the front end of the main body 31. The upper sealing plate 32 covers the upper side of the butted circuit board 1 , and the lower sealing plate 33 covers the lower side of the butted circuit board 1 . A positioning hole 36 is formed on both sides of the upper sealing plate 32 and the lower sealing plate 33. Referring to FIG. The positioning column (not shown) on the injection mold of the inner shell 3 is penetrated therein, so as to accurately fix the relative position of the first inner shell 3 and the docking circuit board 1 for precise molding.

The first shell 4 is made of PBT (polybutylece terephthalate polybutylene terephthalate) material or ABS (Acrylonitrile butadiene styrene) material, wherein the pressure during injection molding of PBT or ABS material And the temperature is higher, but it has better physical characteristics to make the cable connector durable. The first outer shell 4 is overmolded on the outer periphery of the first inner shell 3 again, which includes a body 47 covering the outer periphery of the first inner shell 3 , and two sides extending forward from the upper and lower sides of the front end of the main body 47 . An upper tongue plate 48 and a lower tongue plate 49 , a joint portion 41 at the front, a joint portion 42 at the rear, and an accommodating groove 43 on the upper surface 44 of the first shell 4 with its front end closed and its rear end open. The docking circuit board 1 protrudes forward from the body 47 and is located between the upper tongue plate 48 and the lower tongue plate 49 . The first housing 4 also includes a protruding portion 45 extending backward from the middle of the rear end of the body 47 . Each part is provided with a concave and uneven engaging structure 421 . The accommodating groove 43 includes a first fitting groove 431 disposed at the front end and a second fitting groove 432 disposed at the rear end and further recessed to both sides. A positioning hole 46 is formed on both sides of the main body 47. Referring to FIG. 3, these two positioning holes 46 are also corresponding to the positioning hole 16 of the docking circuit board 1, which can be used for injection molding when molding the first shell 4. The positioning post (not shown) on the top is pierced in it.

The buckle elastic piece 5 includes a base portion 51, an elastic buckle portion 52 formed by bending and extending from the front end of the base portion 51 in reverse, a pressing portion 53 extended from the other end of the elastic buckle portion 52 and formed by A tail portion 54 extends from the other end of the pressing portion 53 . A plurality of fastening protrusions 511 protrude outward from both sides of the base portion 51 along the horizontal direction, and a limiting portion 541 protrudes outward from both sides of the tail portion 54 . The fastening protrusion 511 of the base 51 is correspondingly fastened in the first matching groove 431 of the receiving groove 43 on the first shell 3, and the limiting portion 541 of the tail 54 can be moved up and down in the first matching groove 431. In the second fitting groove 432 on the housing 3 .

The second inner shell 6 is made of PE material, and is overmolded on the outer periphery of the cable 2 to fix the outgoing direction, and has a horizontal joint portion 61 and a bent extension portion 62 . The horizontal joint part 61 is matched with the joint part 42 of the first shell 4 correspondingly, and it is combined with the engaging structure 421 of the first shell 4 to obtain a better joint effect. The bent extension portion 62 is correspondingly overmolded on the outer periphery of the bent extension section 22 of the cable 2 .

The second outer shell 7 is made of ABS or PBT, and it is overmolded on the outer periphery of the second inner shell 6 again. It also has a horizontal joint 71 and a bend vertically extending upward from the horizontal joint 71. The extension part 72, the accommodating groove 43 and the bent extension part 72 of the second housing 7 are set opposite to each other front and back, the front surface 73 of the bent extension part 72 of the second housing 7 is connected to the rear end of the accommodating groove 43 The front-to-back distance between them is smaller than the length of the buckle elastic piece 5 along the front-to-back direction to achieve the purpose of miniaturization. To minimize the overall length of the housing (not shown). It should be noted that the horizontal joint portion 61 of the second inner shell 6 and the horizontal joint portion 71 of the second shell 7 are divided into two parts by the protruding portion 45 on the first shell 4, thereby preventing the second shell from cooling and forming Finally, due to the different shrinkage rates, problems such as peaking and shrinkage appear at the joint between the first shell and the second shell. Forming the second inner shell 6 made of PE material first is beneficial to reduce the damage to the wires, and then forming the second outer shell 7 on the outer periphery of the second inner shell 6 can make the cable connector durable; in addition, although it is preferred in this paper In the embodiment, because the connecting section 21 and the bent extension section 22 of the cable 2 are bent approximately vertically, the horizontal joint portion and the bent extension portion of the second housing are correspondingly approximately vertical, and In other embodiments, when the connecting section 21 of the cable 2 intersects with the bent extension section 22 to form an angle not equal to 90 degrees (such as 70 degrees, 120 degrees), the horizontal joint portion of the second housing and Correspondingly, the bent extension part can be bent and extended obliquely at an included angle not equal to 90 degrees (not shown in the figure).

The manufacturing process of the cable connector of the present utility model generally includes:

Firstly, each conductive wire in the cable 2 is correspondingly welded to each welding point 12 of the docking circuit board 1; Shell 3; then overmolding the first outer shell 4 on the outer periphery of the first inner shell 3; then inserting the buckle elastic piece 5 into the accommodating groove 43 of the first outer shell 4 from back to front ; Then the cable 2 is bent to form the bent extension 22, and the second inner shell 6 is overmolded at the rear of the first outer shell 4; finally, the outer periphery of the second inner shell 6 is covered This second housing 7 is molded.

Compared with the prior art, the beneficial effects of the cable connector of the present utility model include: first forming the first shell on the outer periphery of the butt circuit board 1 welded with the cable 2, and then assembling and holding the shrapnel 5 and then The rear end of the first shell forms an L-shaped second shell. This connector structure can solve the problem of the connection between the front surface 73 of the bent extension 72 of the second shell 7 and the rear of the accommodating groove 43 after the product is miniaturized. Insufficient front-to-back distance between the ends leads to the difficulty that the buckle elastic piece 5 cannot be loaded into after the first shell and the second shell are fully formed, and there is no need to set the open front end on the upper tongue plate as in the prior art. The channel has better structural strength and simpler manufacturing process.

The above content is only a preferred embodiment of the utility model, and is not intended to limit the implementation of the utility model. Those skilled in the art can easily make corresponding modifications or modifications according to the main idea and spirit of the utility model , so the protection scope of the present utility model should be based on the protection scope required by the claims.

Claims (10)

1. A cable connector, comprising a pair of butted circuit boards, the front portion of which is provided with several pairs of contact points, and the rear portion is provided with several welding points; a cable, which has a connecting section and a rear end of the connecting section A bent extension section is bent upwards, and the front end of the connecting section is correspondingly welded on the welding point of the butted circuit board; it is characterized in that it also includes a first shell, which includes a first inner shell and A first outer shell, the first inner shell is overmolded on the outer periphery of the welding point between the connecting section of the cable and the butted circuit board, the first outer shell is overmolded on the outer periphery of the first inner shell again, and has a front a pair of docking parts, a joint part at the rear, and a receiving groove with a closed front end and an open rear end on the upper surface; a second casing, which includes a second inner shell and a second outer shell, the second The inner shell is overmolded on the outer periphery of the bent extension section of the cable to fix the outgoing direction, and has a horizontal joint and a bent extension, the horizontal joint matches the joint of the first shell, the The bent extension part is overmolded on the outer periphery of the bent extension section of the cable, the second outer shell is overmolded on the outer periphery of the second inner shell again; and a buckling elastic piece protrudes a plurality of As for the fastening protrusion, the fastening elastic piece is inserted and fastened in the accommodating groove of the first shell from the back to the front. 2. The cable connector according to claim 1, characterized in that, the first inner shell and the second inner shell are overmolded with materials with lower molding pressure and temperature, and the first outer shell and the second inner shell are overmolded. The shell is overmolded with materials with high molding pressure and high temperature. 3. The cable connector according to claim 2, wherein the first inner shell and the second inner shell are made of PE, and the first outer shell and the second outer shell are made of PBT or ABS. 4. The cable connector according to claim 1, characterized in that, the joint portion of the first outer shell is provided with an uneven engaging structure, and the second inner shell is combined with the engaging structure of the first outer shell . 5. The cable connector according to claim 1, wherein the buckling elastic piece comprises a base and an elastic buckle formed by bending and extending the front end of the base in reverse, and the two sides of the base The plurality of fastening protrusions protrude horizontally outward, and these fastening protrusions are correspondingly fastened and fixed in the accommodating groove of the first shell. 6. The cable connector according to claim 5, wherein the buckling elastic piece further comprises a pressing portion extending from the elastic buckle portion and a tail extending from the pressing portion, the tail portion There is a limit portion protruding outward on both sides of the first shell; the accommodation groove on the first shell includes a first fitting groove for correspondingly fastening and accommodating the base of the buckle elastic piece and a second fitting groove for correspondingly accommodating The position-limiting portion of the buckling elastic piece can allow the tail of the buckling elastic piece to move up and down therein. 7. The cable connector according to claim 1, wherein the second housing also has a horizontal joint and a bent extension extending vertically upward from the horizontal joint, the accommodating groove and the The bent extension part of the second shell is opposite to the front and rear, and the front-to-back distance between the front surface of the bent extension part of the second shell and the rear end of the accommodating groove is smaller than the length of the buckling elastic piece along the front-back direction. 8. The cable connector according to claim 1, wherein a positioning hole is provided on both sides of the docking circuit board, corresponding positioning holes are formed on the first inner shell and the first outer shell and are aligned with The positioning holes of the docking circuit boards are connected through each other. 9. The cable connector according to claim 1, wherein the first outer shell comprises a body covering the outer periphery of the first inner shell, and an upper tongue extending forward from the front end of the body and the lower tongue plate, the docking circuit board protrudes forward from the body of the first shell and is located between the upper tongue plate and the lower tongue plate. 10. The cable connector according to claim 9, wherein the first shell further comprises a protruding portion extending backward from the middle of the rear end of the body, and the joint portion is backward from the body Extending and including two parts that are recessed on both sides of the protruding part, each part is provided with a concave and uneven engaging structure.

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