CN109449638B

CN109449638B - Straight plug

Info

Publication number: CN109449638B
Application number: CN201811321432.7A
Authority: CN
Inventors: 沈榕鑫; 宁鹏涛; 令狐云波; 刘思锶; 唐兴然
Original assignee: Taiwan Luxshare Precision Ltd
Current assignee: Kunshan Luxshare Precision Industry Co Ltd
Priority date: 2018-11-07
Filing date: 2018-11-07
Publication date: 2020-04-24
Anticipated expiration: 2038-11-07
Also published as: CN109449638A

Abstract

The invention belongs to the technical field of connectors and discloses a straight plug. This straight plug includes: the head of the cable is sleeved with an external fastening ring; the plug terminal comprises a first tail end and a second tail end, wherein the first tail end is connected with the cable, and the second tail end is used for electrically contacting with the conductive terminal of the socket; and the shielding cover and the outer fastening ring are separately arranged, the shielding cover is sleeved outside the plug terminal, and the rear end of the shielding cover is connected with the outer fastening ring. According to the invention, the shielding cover is sleeved outside the plug terminal and is connected with the outer fastening ring at the head part of the cable, so that the shielding performance of the plug terminal is enhanced, and the problem of poor shielding performance of the plug terminal of the conventional straight plug is solved.

Description

Straight plug

Technical Field

The invention relates to the technical field of connectors, in particular to a straight plug.

Background

In the current market, a new energy automobile with a similar specification has high voltage and large current, and a connector (particularly a plug) generally has the characteristics of high cost, complex manufacture, low current conduction efficiency, poor shielding performance, weak protective performance and the like. Therefore, a new straight plug is needed to solve the above problems.

Disclosure of Invention

The invention aims to provide a straight plug to solve the problem that the shielding performance of a plug terminal of the existing straight plug is poor.

In order to achieve the purpose, the invention adopts the following technical scheme:

a straight plug, comprising:

the head of the cable is sleeved with an external fastening ring;

the plug terminal comprises a first tail end and a second tail end, wherein the first tail end is connected with the cable, and the second tail end is used for electrically contacting with the conductive terminal of the socket;

and the shielding cover and the outer fastening ring are separately arranged, the shielding cover is sleeved outside the plug terminal, and the rear end of the shielding cover is connected with the outer fastening ring.

Preferably, the shield case extends rearward beyond the first end, and the rear end of the shield case is provided with a plurality of first elastic pressing fingers arranged in a circumferential direction, the first elastic pressing fingers being pressed against an outer surface of the outer fastening ring.

Preferably, the cable comprises a wire core, an inner insulating layer, a shielding wire and an outer insulating layer from inside to outside in sequence, the wire core is connected with the first end, an inner fastening ring and an outer fastening ring are sleeved outside the outer insulating layer, the shielding wire is reversely folded outside the inner fastening ring, and the shielding wire is fixed between the outer fastening ring and the inner fastening ring.

Preferably, the first end and the second end are integrally formed, the first end is provided with a connecting hole for inserting and fixing the wire core, the second end is provided with a jack for inserting a conductive terminal of the socket, and a plug rubber core is arranged between the plug terminal and the shielding case.

Preferably, the cable connector further comprises an insulating shell, wherein an inserting body for inserting the cable is arranged in the insulating shell, the inserting body and the insulating shell are integrally formed, one end of the inserting body abuts against the side wall of the inner fastening ring, the other end of the inserting body abuts against the junction of the first tail end and the second tail end, the inner insulating layer, the wire core and the first tail end are contained in the inserting body, and the outer fastening ring and the shielding cover are coated outside the inserting body; the plug rubber core is provided with a cavity for accommodating the second end and the insertion body, the outer sleeve of the plug rubber core is provided with a shielding cover, and the other end of the shielding cover is fixedly connected with the plug rubber core.

Preferably, the front end of the shielding case is provided with a plurality of second elastic pressing fingers which are arranged along the circumferential direction, and the second elastic pressing fingers are pressed on the outer surface of the plug rubber core; every two adjacent second elasticity are pressed and are indicated between be equipped with the breach, and the plug is glued and is equipped with a plurality of spacing portions on the core, and spacing portion joint is in the breach.

Preferably, a plurality of first bulges protruding outwards and second bulges protruding inwards are arranged on the periphery of the shielding cover, an annular boss is arranged on the inner surface of the insulating shell, and the first bulges are abutted to the annular boss; the outer surface of the plug rubber core is provided with a plurality of grooves, and the second bulges are clamped in the grooves.

Preferably, the insulating casing includes the first through-hole that is used for supplying the cable head to pass, and the outside of first through-hole is equipped with a plurality of buckles, and the outside cover of cable is equipped with first sealing washer and tail-hood, and first sealing washer is sealed in first through-hole, and the tail-hood and buckle joint to with interior tighrening ring, outer tighrening ring and plug terminal seal in insulating casing.

Preferably, the first sealing ring is provided with at least one clamping position, the tail cover is provided with at least one through hole, and the clamping position penetrates through the through hole and then is clamped, so that the first sealing ring is accommodated in the tail cover.

Preferably, the insulating housing further comprises a second through hole for the second end to penetrate through, a second sealing ring and a positioning piece are nested between the outside of the second through hole and the inner wall of the insulating housing, the second sealing ring is fixedly arranged on the positioning piece, and the positioning piece is clamped on the inner wall of the insulating housing.

The invention has the beneficial effects that:

according to the invention, the shielding cover is sleeved outside the plug terminal and is connected with the outer fastening ring at the head part of the cable, so that the shielding performance of the plug terminal is enhanced, and the problem of poor shielding performance of the plug terminal of the conventional straight plug is solved.

Drawings

FIG. 1 is a schematic structural diagram of a straight plug provided by the present invention;

FIG. 2 is a schematic cross-sectional view from one perspective of FIG. 1;

FIG. 3 is a schematic cross-sectional view of FIG. 1 from another perspective;

FIG. 4 is an exploded view of the cable, second seal ring and positioning member;

FIG. 5 is a cross-sectional schematic view of a cable;

FIG. 6 is a schematic structural view of a shield can;

fig. 7 is a schematic structural diagram of a plug core.

In the figure:

11. a cable; 12. a plug terminal; 13. a shield case; 14. an inner fastening ring; 15. an outer fastening ring; 16. a first seal ring; 17. a tail cover; 111. a wire core; 112. an inner insulating layer; 113. an outer insulating layer; 121. a first end; 122. a second end; 123. connecting holes; 124. a jack; 125. inserting a reed; 131. a first elastic pressing finger; 132. a second elastic pressing finger; 133. a first protrusion; 134. a second protrusion; 135. a notch; 161. clamping and connecting; 171. a through hole;

2. an insulating housing; 21. an insertion body; 22. an annular boss; 23. a first through hole; 24. a second through hole; 25. buckling; 26. a second seal ring; 27. a positioning member;

3. a plug rubber core; 31. a groove; 32. a limiting part.

Detailed Description

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

In the present invention, orientation words are defined, and in the case where no description is made on the contrary, the use of the orientation words such as "front and rear" means that the straight plug provided by the present invention is defined in the normal use condition and is consistent with the front and rear direction shown in fig. 1, that is, "front" means the end of the straight plug inserted into the socket, and "rear" means the end of the cable extending direction.

As shown in fig. 1, the straight plug provided by the present invention can share the same socket with the bent plug, and includes at least one cable 11, the cable 11 is inserted into the insulating housing 2, and the insulating housing 2 is injection molded by using insulating material PA66+ GF with high temperature resistance, chemical resistance and good dimensional stability.

As shown in fig. 1 and 2, the insulating housing 2 is provided with at least one first through hole 23 for the head of the cable 11 to pass through, the first through hole 23 is provided with a plurality of fasteners 25 on the outside, the cable 11 is sleeved with a first sealing ring 16 and a tail cover 17 on the outside, the first sealing ring 16 is sealed in the first through hole 23, and the tail cover 17 is fastened with the fasteners 25 to seal the inner fastening ring 14, the outer fastening ring 15 and the plug terminal 12 in the insulating housing 2.

As shown in fig. 2 to 5, the plug terminal 12 includes a first end 121 and a second end 122, the first end 121 is connected to the cable 11, and the second end 122 is used for electrically contacting with a conductive terminal of the socket; the shielding cover 13 and the outer fastening ring 15 are separately arranged, the outer part of the plug terminal 12 is sleeved with the shielding cover, the rear end of the shielding cover is connected with the outer fastening ring 15, the shielding structure covering the plug terminal 12 is formed after the shielding cover 13 and the outer fastening ring 15 are connected, accordingly, the shielding performance of the plug terminal 12 of the straight plug can be enhanced, and the problem that the shielding performance of the plug terminal of the existing straight plug is poor is solved.

Further, the cable 11 sequentially includes a wire core 111, an inner insulating layer 112, a shielding wire (not shown in the figure) and an outer insulating layer 113 from inside to outside, the wire core 111 is connected to the first end 121, an inner fastening ring 14 and an outer fastening ring 15 are sleeved outside the outer insulating layer 113, the shielding wire is folded back outside the inner fastening ring 14 and is fixed between the outer fastening ring 15 and the inner fastening ring 14, so that the shielding wire is prevented from penetrating the inner insulating layer 112 of the cable 11 and being conducted with the wire core 111. Meanwhile, the outer fastening ring 15 is connected to the shield wire and further grounded to form a shield loop, which can further enhance the shielding performance of the plug terminal 12.

Specifically, the first end 121 and the second end 122 are integrally formed, the first end 121 is provided with a connecting hole 123 for inserting the wire core 111, the second end 122 is provided with a jack 124 for inserting a conductive terminal of the socket, and a plug blade 125 is arranged on an inner wall of the jack 124, so that the second end 122 and the conductive terminal of the socket can be more firmly inserted in the jack 124 by the arrangement of the plug blade 125. It will be appreciated that the first end 121 may be not only plugged into the core 111, but may also be crimped, welded or threaded.

Specifically, the first end 121 and the second end 122 are formed by stamping and bending a copper alloy sheet metal, so that tolerance consistency is easily adjusted, performance inconsistency of products due to accumulated tolerance is avoided, meanwhile, the weight of the copper alloy is reduced, and cost rise is reduced from the raw material; and the surface of the copper foil is ensured to resist corrosion and acid and alkali by adopting an electroplating process so as to reduce the contact resistance of the copper foil. Plug blade 125 adopts high conductivity, high resilience force copper alloy stamping forming for plug blade 125 satisfies the plug requirement, and through experimental demonstration, the plug life-span is greater than 500 times. And the surface of the plug-in reed 125 is protected by the electroplating process, so that the corrosion resistance and the acid and alkali resistance of the plug-in reed are ensured, the contact resistance of the plug-in reed is reduced, and the plug-in reed can bear larger overload current. Specifically, a plurality of elastic contact fingers are convexly arranged on the surface of the insertion spring piece 125, so that the second end 122 and the conductive terminal of the socket can be more firmly inserted into the insertion hole 124 by arranging the insertion spring piece 125, thereby solving the problem that the terminal connection of the conventional straight plug is not reliable.

Specifically, an insertion body 21 for inserting the cable 11 is provided in the insulating housing 2, the insertion body 21 is fixed to the inner wall of the insulating housing 2 by a plurality of fixing points, and the insertion body 21 is preferably formed by injection molding integrally with the insulating housing 2. One end of the insertion body 21 abuts against the sidewall of the inner fastening ring 14, the other end abuts against the boundary between the first end 121 and the second end 122, the inner insulating layer 112, the wire core 111 and the first end 121 are all accommodated inside the insertion body 21, and the outer fastening ring 15 and the shielding cover 13 are all covered outside the insertion body 21, so as to prevent the plug terminal 12 from possibly touching the shielding structure and losing the shielding effect.

Specifically, the straight plug further comprises a plug rubber core 3, the plug rubber core 3 is provided with a cavity for accommodating the second end 122 and the insertion body 21, the shielding cover 13 is sleeved outside the plug rubber core 3, and the other end of the shielding cover 13 is fixedly connected with the plug rubber core 3. Further, as shown in fig. 6 and 7, the shield shell 13 extends rearward beyond the first end 121, the rear end of the shield shell 13 is provided with a plurality of first elastic pressing fingers 131 arranged in the circumferential direction, and the first elastic pressing fingers 131 are pressed against the outer surface of the outer fastening ring 15; the front end of the shielding case 13 is provided with a plurality of second elastic pressing fingers 132 arranged along the circumferential direction, and the second elastic pressing fingers 132 are pressed on the outer surface of the plug rubber core 3; a gap 135 is arranged between every two adjacent second elastic pressing fingers 132, a plurality of limiting parts 32 are arranged on the plug rubber core 3, and the limiting parts 32 are clamped in the gap 135. The first elastic pressing finger 131 is arranged to enable the shielding cover 13 and the outer fastening ring 15 to be fixed more firmly, a complex clamping process can be avoided, and only after the cable 11 is inserted into the insulating shell 2 along the first through hole 23, the plug rubber core 3 and the shielding cover 13 are inserted into the insulating shell 2 along the second through hole 24 together, so that the shielding cover 13 and the outer fastening ring 15 can be connected more conveniently. By arranging the second elastic pressing finger 132 and the limiting part 32, the plug rubber core 3 and the shielding case 13 are well positioned and fixed. The plug rubber core 3 is formed by injection molding of an insulating material PA66+ GF with high strength, high temperature resistance, chemical resistance and good dimensional stability, and the high strength and high toughness of the plastic are fully utilized.

Further, referring to fig. 2, 3, 6 and 7, a plurality of first protrusions 133 protruding outward and second protrusions 134 protruding inward are disposed on the circumference of the shielding can 13, an annular boss 22 is disposed on the inner surface of the insulating housing 2, the first protrusions 133 abut against the annular boss 22, and when the plug rubber core 3 and the shielding can 13 are inserted into the insulating housing 2 along the second through hole 24, a "click" sound that the first protrusions 133 abut against the annular boss 22 is heard, so that it is determined that the shielding can 13 is mounted in place. The surface that core 3 was glued to the plug is equipped with a plurality of recesses 31, and the protruding 134 joint of second is in recess 31, so can further strengthen shielding cover 13 and the fastening degree that core 3 was glued to the plug, avoids shielding cover 13 to appear breaking away from the situation that core 3 was glued to the plug when the installation.

Specifically, the insulating housing 2 is provided with at least one first through hole 23 for inserting the cable 11 and at least one second through hole 24 for passing the second end 122 out, and the first through hole 23 is communicated with the second through hole 24. The outside cover of cable 11 is equipped with first sealing washer 16 and tail-hood 17, and first sealing washer 16 is sealed in first through-hole 23, and tail-hood 17 and buckle 25 joint to seal interior tighrening ring 14, outer tighrening ring 15 and plug terminal 12 in insulating casing 2. A second sealing ring 26 and a positioning part 27 are nested between the outside of the second through hole 24 and the inner wall of the insulating housing 2, the second sealing ring 26 is fixedly arranged on the positioning part 27, and the positioning part 27 is clamped on the inner wall of the insulating housing 2. By providing the sealing rings (i.e., the first sealing ring 16 and the second sealing ring 26) at the gap where the straight plug communicates with the outside, the waterproof and dustproof capabilities of the metal elements inside the insulating housing 2 are increased. Wherein, the positioning member 27 also contains a metal short contact piece, when the straight plug is buckled with the socket, the metal short contact piece is communicated with the contact element in the socket, thereby realizing the normally open state of the connector.

The first sealing ring 16 and the second sealing ring 26 are both made of VMQ materials which are resistant to high and low temperatures (such as-40 ℃ to +180 ℃) and resistant to scatter-tear and self-lubricating, thereby ensuring strict waterproof effect.

Referring to fig. 5, the first sealing ring 16 is provided with at least one clamping position 161, the tail cover 17 is provided with at least one through hole 171, and the clamping position 161 is clamped after passing through the through hole 171, so that the first sealing ring 16 is accommodated in the tail cover 17, and the first sealing ring 16 can be ensured to be sealed in the first through hole 23 more accurately, thereby ensuring the sealing effect at the first through hole 23.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art based on the foregoing description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A straight plug, comprising:

a cable (11) with an outer fastening ring (15) sleeved on the head;

a plug terminal (12) comprising a first end (121) and a second end (122), the first end (121) being connected to the cable (11), the second end (122) being for electrical contact with a conductive terminal of a socket;

a shield cover (13) which is provided separately from the outer fastening ring (15), the shield cover (13) being fitted to the outside of the plug terminal (12), and the rear end of which is connected to the outer fastening ring (15);

the cable (11) sequentially comprises a wire core (111), an inner insulating layer (112), a shielding wire and an outer insulating layer (113) from inside to outside, the wire core (111) is connected with the first tail end (121), an inner fastening ring (14) and an outer fastening ring (15) are sleeved outside the outer insulating layer (113), the shielding wire is reversely folded outside the inner fastening ring (14), and the shielding wire is fixed between the outer fastening ring (15) and the inner fastening ring (14);

the first tail end (121) and the second tail end (122) are integrally formed, the first tail end (121) is provided with a connecting hole (123) for the wire core (111) to be inserted and fixed, the second tail end (122) is provided with an inserting hole (124) for the conductive terminal of a socket to be inserted, and a plug rubber core (3) is arranged between the plug terminal (12) and the shielding case (13);

the cable connector is characterized by further comprising an insulating shell (2), an inserting body (21) for inserting the cable (11) is arranged in the insulating shell (2), the inserting body (21) and the insulating shell (2) are integrally formed, one end of the inserting body (21) abuts against the side wall of the inner fastening ring (14), the other end of the inserting body abuts against the junction of the first tail end (121) and the second tail end (122), the inner insulating layer (112), the wire core (111) and the first tail end (121) are contained in the inserting body (21), and the outer fastening ring (15) and the shielding cover (13) are coated outside the inserting body (21);

the plug rubber core (3) is provided with a cavity for accommodating the second tail end (122) and the insertion body (21), the shielding cover (13) is sleeved outside the plug rubber core (3), and the other end of the shielding cover (13) is fixedly connected with the plug rubber core (3);

the insulating shell (2) comprises a first through hole (23) for the head of the cable (11) to pass through, a plurality of buckles (25) are arranged outside the first through hole (23), a first sealing ring (16) and a tail cover (17) are sleeved outside the cable (11), the first sealing ring (16) is sealed in the first through hole (23), and the tail cover (17) is clamped with the buckles (25) so as to seal the inner fastening ring (14), the outer fastening ring (15) and the plug terminal (12) in the insulating shell (2);

be equipped with at least one joint position (161) on first sealing washer (16), be equipped with at least one through-hole (171) on tail-hood (17), joint position (161) pass through joint behind through-hole (171), so that first sealing washer (16) accept in tail-hood (17).

2. The straight plug according to claim 1, wherein the shield (13) extends rearwardly beyond the first end (121), the rear end of the shield (13) being provided with a plurality of first resilient pressure fingers (131) arranged in a circumferential direction, the first resilient pressure fingers (131) being crimped to an outer surface of the outer fastening ring (15).

3. The straight plug according to claim 1, wherein the front end of the shielding case (13) is provided with a plurality of second elastic pressing fingers (132) arranged along the circumferential direction, and the second elastic pressing fingers (132) are pressed on the outer surface of the plug rubber core (3); every two adjacent second elasticity is pressed and is indicated (132) between be equipped with breach (135), be equipped with a plurality of spacing portions (32) on plug rubber core (3), spacing portion (32) joint in breach (135).

4. The straight plug according to claim 3, wherein a plurality of first protrusions (133) protruding outwards and second protrusions (134) protruding inwards are arranged on the periphery of the shielding case (13), an annular boss (22) is arranged on the inner surface of the insulating shell (2), and the first protrusions (133) abut against the annular boss (22); the outer surface of the plug rubber core (3) is provided with a plurality of grooves (31), and the second protrusions (134) are clamped in the grooves (31).

5. The straight plug according to claim 1, wherein the insulating housing (2) further comprises a second through hole (24) for the second end (122) to pass through, a second sealing ring (26) and a positioning member (27) are nested between the outside of the second through hole (24) and the inner wall of the insulating housing (2), the second sealing ring (26) is fixedly arranged on the positioning member (27), and the positioning member (27) is clamped on the inner wall of the insulating housing (2).