Directional assembly type electric connector tail attachment and assembly method

Abstract

The invention discloses a directional assembly type electric connector tail attachment and an assembly method, the directional assembly type electric connector tail attachment comprises a connector and a tail attachment, the connector and the tail attachment are axially assembled, the tail of the connector is provided with a barb mounting groove and an extrusion groove, the barb mounting groove and the extrusion groove are adjacently distributed, and the extrusion groove is closer to the tail of the connector; an annular bulge is formed between the barb mounting groove and the extrusion groove; no less than one key groove is formed in the annular bulge; a clamping thorn groove and a rubber ring mounting groove are formed in the head of the tail attachment, the clamping thorn groove and the rubber ring mounting groove are distributed adjacently, and the clamping thorn groove is closer to the tail of the tail attachment; and the inner wall of the tail attachment is provided with a key bar matched with the key slot for realizing directional assembly of the connector and the tail attachment. Through the unique structural design of the tail attachment, the problem that the tail attachment is difficult to orientate when an assembly is manufactured under the condition of a narrow space is solved, and meanwhile, the connection sealing performance and stability are better.

Description

Technical Field

[0001] The invention belongs to the technical field of electric connectors, and in particular relates to a tail attachment and assembly method of a directional assembly type electric connector. Background Art

[0002] The tail attachment of an electrical connector is referred to as "tail attachment", which usually refers to the design and implementation of an electrical connector at one end or part of the connector. The "tail attachment" part of an electrical connector is usually the interface part of the connector, which is used to connect cables or other conductors and realize electrical connections.

[0003] When space is not constrained, the bent tail attachment can be oriented by setting end teeth on the connector and the tail attachment sleeve, and by setting a connecting piece on the outside of the tail attachment sleeve and connecting the tail attachment to the connector through threaded cooperation between the connecting piece and the connector.

[0004] When space is limited, the size of the bent tail attachment is not enough to set the above-mentioned connector. If the thread is set on the tail attachment sleeve, the outlet direction of the bent tail attachment is not easy to control. It can be guaranteed by limiting the starting and ending positions of the thread, but the efficiency of producing the tail attachment is significantly reduced, and the cost of machining will be significantly increased.

[0005] Therefore, how to achieve directional assembly of bent tail attachments in a narrow space is an urgent problem to be solved. Summary of the invention

[0006] The present invention aims at solving the problems in the prior art and proposes the following technical solutions:

[0007] A directional assembly type electrical connector tail attachment, comprising a connector and a tail attachment, wherein the connector and the tail attachment are axially assembled, a barb installation groove and an extrusion groove are provided at the tail of the connector, the barb installation groove and the extrusion groove are adjacently distributed and the extrusion groove is closer to the tail of the connector; an annular protrusion is formed between the barb installation groove and the extrusion groove, and at least one key groove is provided on the annular protrusion; a clamping groove and a rubber ring installation groove are provided at the head of the tail attachment, the clamping groove and the rubber ring installation groove are adjacently distributed and the clamping groove is closer to the tail of the tail attachment; a key strip adapted to the key groove is provided on the inner wall of the tail attachment for realizing directional assembly of the connector and the tail attachment;

[0008] The assembled tail attachment also includes a barb piece and a rubber ring. When the connector and the tail attachment are assembled, the barb piece is pre-assembled on the barb installation groove and the barb head on the barb piece is inserted into the barb groove, and the rubber ring is inserted into the cavity between the extrusion groove and the rubber ring installation groove.

[0009] As a preferred embodiment of the above technical solution, the barb member is made of an annular metal elastic member.

[0010] As a preferred embodiment of the above technical solution, the outer end surface of the barb is provided with a slope;

[0011] The outer arc surface of the barb is provided with a docking groove, and the docking groove and the key groove are matched.

[0012] As a preferred embodiment of the above technical solution, after the connector and the tail attachment are assembled, the side of the extrusion groove close to the tail of the connector and the side of the rubber ring installation groove close to the tail of the tail attachment are at the same axial depth; the axial width of the extrusion groove is smaller than the axial width of the rubber ring.

[0013] As a preferred embodiment of the above technical solution, the head of the tail attachment is provided with a sealing groove, a sealing ring is installed in the sealing groove, and the inner diameter of the sealing ring is matched with the outer diameter of the tail of the connector.

[0014] As a preferred embodiment of the above technical solution, the number of the sealing groove is at least one, the sealing groove and the rubber ring installation groove are adjacent to each other, and the rubber ring installation groove is close to the head of the connector.

[0015] An assembly method is applied to the above-mentioned directional assembly type electrical connector tail attachment, and the assembly method comprises the following steps:

[0016] S1, pre-preparation stage: before the connector and the tail are butt-jointed, first put the barb piece on the barb installation groove and make the barb head face the tail of the connector; at the same time, put the rubber ring on the rubber ring installation groove;

[0017] S2, initial plug-in stage: axially connect the tail attachment and the connector, hold the tail attachment and move it axially toward the connector until the key bar abuts against the annular protrusion, and the tail attachment cannot move further;

[0018] S3, secondary plug-in stage: adjust the axial angle of the tail attachment and plug it at the same time, the tail attachment continues to move axially toward the connector, at this time the key bar and the key slot coincide, realizing the relative positioning of the connector and the tail attachment; then the tail attachment continues to move toward the connector at the axial angle until the barb head falls into the barb slot, thereby completing the directional assembly of the connector and the tail attachment.

[0019] The beneficial effects of the present invention are:

[0020] 1. The docking assembly of the connector and the tail attachment of the present invention is divided into three stages. Stage one: before docking assembly, insert the barb into the barb mounting groove of the connector and make the barb head face the tail of the connector; in this stage, the barb is properly stretched, and the barb can automatically rebound and reset after assembly. Since the tail attachment has not been assembled at this time, there is plenty of assembly space, and the assembly is simple and quick; Stage two: install the rubber ring in the rubber ring mounting groove of the tail attachment; in this stage, the tail attachment can be held in the external space for separate installation without space restrictions; Stage three, axially dock the connector and the tail attachment, and then fine-tune the axial position of the tail attachment so that the key bar and the key slot coincide, and finally further deepen the insertion; this stage is simple to operate and requires little space. The three stages of docking assembly of the connector and the tail attachment of the present invention all have small space requirements and meet the directional assembly requirements of the bent tail attachment, solving the problem of difficult directional assembly of the tail attachment during component production in a narrow space;

[0021] 2. In the present invention, the axial width of the extrusion groove is smaller than the axial width of the rubber ring. When the connector and the tail attachment are assembled, the side of the extrusion groove close to the tail of the connector and the side of the rubber ring installation groove close to the tail of the tail attachment are at the same axial depth, which means that the rubber ring is in an axially extruded state at this time. Under the joint action of the extrusion rubber ring and the engagement of the barb, an axial extrusion force is provided to make the connector, the tail attachment and the barb fit completely, preventing the tail attachment from axially moving.

[0022] 3. The head of the tail attachment is provided with a sealing groove, a sealing ring is installed in the sealing groove, and the inner diameter of the sealing ring is matched with the outer diameter of the tail of the connector. The number of the sealing groove is at least one, the sealing groove and the rubber ring installation groove are adjacent to each other, and the rubber ring installation groove is close to the head of the connector. In the present invention, the rubber ring plays the role of the first layer of sealing. By setting the second layer of sealing of the sealing groove and the sealing ring, the sealing effect is better. At the same time, the inner diameter of the sealing ring is matched with the outer diameter of the tail of the connector, which can redundantly fill the radial gap between the connector and the tail attachment, and further ensure the stability and sealing of the connection between the connector and the tail attachment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The figure shows a directional assembly type electrical connector tail attachment and a completed connector assembly diagram in the present invention;

[0024] Figure 2 The structure diagram of a directional assembly type electrical connector with a middle connector attached to the rear end of the present invention is shown;

[0025] Figure 3 The figure shows a schematic structural diagram of a tail attachment of a directional assembly type electrical connector in the present invention;

[0026] Figure 4 Shown is a schematic structural diagram of a barbed member attached to the tail of a directional assembled electrical connector in the present invention.

[0027] In the figure: 1, connector; 11, barb installation groove; 12, extrusion groove; 13, key groove; 2, tail attachment; 21, barb groove; 22, rubber ring installation groove; 23, sealing groove; 24, key strip; 3, barb piece; 31, barb head; 32, slope; 33, docking groove; 4, rubber ring; 5, sealing ring. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0029] Example

[0030] like Figure 1-Figure 4 As shown, a directional assembly type electrical connector tail attachment includes a connector 1 and a tail attachment 2, and the connector 1 and the tail attachment 2 are axially assembled, the tail of the connector 1 is provided with a barb installation groove 11 and an extrusion groove 12, the barb installation groove 11 and the extrusion groove 12 are adjacently distributed and the extrusion groove 12 is closer to the tail of the connector 1; an annular protrusion is formed between the barb installation groove 11 and the extrusion groove 12, and at least one key groove 13 is provided on the annular protrusion; a clamping groove 21 and a rubber ring installation groove 22 are provided at the head of the tail attachment 2, the clamping groove 21 and the rubber ring installation groove 22 are adjacently distributed and the clamping groove 21 is closer to the tail of the tail attachment 2; the inner wall of the tail attachment 2 is provided with a key strip 24 adapted to the key groove 13 for realizing directional assembly of the connector 1 and the tail attachment 2;

[0031] The assembled tail attachment also includes a barb piece 3 and a rubber ring 4. When the connector 1 and the tail attachment 2 are assembled, the barb piece 3 is pre-assembled on the barb mounting groove 11 and the barb head 31 on the barb piece 3 is inserted into the barb groove 21, and the rubber ring 4 is inserted into the cavity between the extrusion groove 12 and the rubber ring mounting groove 22.

[0032] In the present invention, the barb piece 3 is made of an annular metal elastic piece. Before the connector 1 and the tail attachment 2 are butt-jointed and assembled, the barb piece 3 is first clamped on the barb installation groove 11 and the barb head 31 is directed toward the tail of the connector 1. When the barb piece 3 is inserted into the barb installation groove 11 at the tail of the connector 1, the barb piece 3 is first properly stretched open, and it can automatically rebound and reset after assembly; then the tail attachment 2 and the connector 1 are axially butt-jointed and assembled, and the tail attachment 2 is held and moved axially in the direction close to the connector 1 until the key bar 24 abuts against the annular protrusion, and the tail attachment 2 cannot move further at this time; the axial angle of the tail attachment 2 is adjusted and the tail attachment 2 is continuously plugged in and out at the same time until the tail attachment 2 can continue to move axially a short distance in the direction of the connector 1, and the key bar 24 and the key groove 13 coincide with each other, thereby realizing the relative positioning of the connector 1 and the tail attachment 2; then the tail attachment 2 continues to move toward the connector 1 at the axial angle until the barb head 31 falls into the clamping groove 21, thereby completing the directional assembly of the connector 1 and the tail attachment 2. The tail attachment of the present invention solves the problem of difficulty in orienting the tail attachment during assembly manufacturing in a narrow space through its unique structural design.

[0033] The outer end surface of the barb 3 is provided with a slope 32 ; the slope 32 plays a guiding role when the connector 1 and the tail 2 are assembled.

[0034] The outer arc surface of the barb 3 is provided with a docking groove 33 , and the docking groove 33 and the key groove 13 are matched.

[0035] like Figure 1 As shown, after the connector 1 and the tail attachment 2 are assembled, the side of the extrusion groove 12 close to the tail of the connector 1 and the side of the rubber ring installation groove 22 close to the tail of the tail attachment 2 are at the same axial depth; the axial width of the extrusion groove 12 is smaller than the axial width of the rubber ring 4.

[0036] Since the axial width of the extrusion groove 12 is smaller than the axial width of the rubber ring 4, when the connector 1 and the tail attachment 2 are assembled, the side of the extrusion groove 12 close to the tail of the connector 1 and the side of the rubber ring installation groove 22 close to the tail of the tail attachment 2 are at the same axial depth, which means that the rubber ring 4 is under axial extrusion at this time. Under the joint action of the extrusion rubber ring 4 and the engagement of the barb 3, an axial extrusion force is provided to make the connector 1, the tail attachment 2 and the barb 3 fully fit together to prevent the tail attachment 2 from axial movement.

[0037] The head of the tail attachment 2 is provided with a sealing groove 23, in which a sealing ring 5 is installed, and the inner diameter of the sealing ring 5 is adapted to the outer diameter of the tail of the connector 1. The number of the sealing groove 23 is at least one, and the sealing groove 23 and the rubber ring installation groove 22 are adjacently distributed, and the rubber ring installation groove 22 is close to the head of the connector 1. In the present invention, the rubber ring 4 plays the role of the first layer of sealing. By setting the second layer of sealing of the sealing groove 23 and the sealing ring 5, the sealing effect is better. At the same time, the inner diameter of the sealing ring 5 is adapted to the outer diameter of the tail of the connector 1, and the radial gap between the connector 1 and the tail attachment 2 can be redundantly filled, further ensuring the stability and sealing of the connection between the connector 1 and the tail attachment 2.

[0038] An assembly method is applied to the above-mentioned directional assembly type electrical connector tail attachment, and the assembly method comprises the following steps:

[0039] S1, preparatory stage: before the connector 1 and the tail attachment 2 are butt-jointed, the barb 3 is first inserted into the barb installation groove 11 with the barb head 31 facing the tail of the connector 1; at the same time, the rubber ring 4 is inserted into the rubber ring installation groove 22;

[0040] S2, initial plug-in stage: the tail attachment 2 and the connector 1 are axially butted together, and the tail attachment 2 is held and moved axially toward the connector 1 until the key bar 24 abuts against the annular protrusion, and the tail attachment 2 cannot move further;

[0041] S3, secondary plugging stage: adjust the axial angle of the tail attachment 2 and plug the tail attachment 2 at the same time, the tail attachment 2 can continue to move axially a short distance toward the direction of the connector 1, at this time the key strip 24 and the key slot 13 coincide with each other, and the relative positioning of the connector 1 and the tail attachment 2 is realized; then the tail attachment 2 continues to move toward the connector 1 at the axial angle until the barb head 31 falls into the barb slot 21, thereby completing the directional assembly of the connector 1 and the tail attachment 2.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A directional assembly type electrical connector tail attachment, comprising a connector (1) and a tail attachment (2), wherein the connector (1) and the tail attachment (2) are axially assembled, characterized in that: The tail of the connector (1) is provided with a barb installation groove (11) and an extrusion groove (12), the barb installation groove (11) and the extrusion groove (12) are adjacently arranged and the extrusion groove (12) is closer to the tail of the connector (1); an annular protrusion is formed between the barb installation groove (11) and the extrusion groove (12), and at least one key groove (13) is provided on the annular protrusion; the head of the tail attachment (2) is provided with a clamping groove (21) and a rubber ring installation groove (22), the barb installation groove (21) and the rubber ring installation groove (22) are adjacently arranged and the barb groove (21) is closer to the tail of the tail attachment (2); the inner wall of the tail attachment (2) is provided with a key strip (24) adapted to the key groove (13) for realizing directional assembly of the connector (1) and the tail attachment (2); The assembled tail attachment also includes a barb piece (3) and a rubber ring (4). When the connector (1) and the tail attachment (2) are assembled, the barb piece (3) is pre-assembled on the barb installation groove (11) and the barb head (31) on the barb piece (3) is inserted into the barb groove (21), and the rubber ring (4) is inserted into the cavity between the extrusion groove (12) and the rubber ring installation groove (22).

2. A directional assembly type electrical connector tail attachment according to claim 1, characterized in that: The barbed piece (3) is made of an annular metal elastic piece.

3. A directional assembly type electrical connector tail attachment according to claim 2, characterized in that: The outer end surface of the barbed piece (3) is provided with a slope (32); The outer arc surface of the barb (3) is provided with a docking groove (33), and the docking groove (33) and the key groove (13) are matched.

4. The directional assembly type electrical connector tail attachment according to claim 1, characterized in that: After the connector (1) and the tail attachment (2) are assembled, the side of the extrusion groove (12) close to the tail of the connector (1) and the side of the rubber ring installation groove (22) close to the tail of the tail attachment (2) are located at the same axial depth; the axial width of the extrusion groove (12) is smaller than the axial width of the rubber ring (4).

5. The directional assembly type electrical connector tail attachment according to claim 1, characterized in that: The head of the tail attachment (2) is provided with a sealing groove (23), a sealing ring (5) is installed in the sealing groove (23), and the inner diameter of the sealing ring (5) is matched with the outer diameter of the tail of the connector (1).

6. The directional assembly type electrical connector tail attachment according to claim 5, characterized in that: The number of the sealing groove (23) is at least one, the sealing groove (23) and the rubber ring installation groove (22) are adjacently distributed, and the rubber ring installation groove (22) is close to the head of the connector (1).

7. An assembly method, characterized in that: The assembly method is applied to a directional assembly type electrical connector tail attachment as described in any one of claims 1 to 6, and the assembly method comprises the following steps: S1, preparatory stage: before the connector (1) and the tail attachment (2) are butt-jointed, the barb piece (3) is first inserted into the barb installation groove (11) with the barb head (31) facing the tail of the connector (1); at the same time, the rubber ring (4) is inserted into the rubber ring installation groove (22); S2, initial plug-in stage: the tail attachment (2) and the connector (1) are axially butted together, and the tail attachment (2) is held and axially moved toward the connector (1) until the key bar (24) abuts against the annular protrusion, and the tail attachment (2) cannot move further; S3, secondary plugging stage: the axial angle of the tail attachment (2) is adjusted and the tail attachment (2) is plugged at the same time, the tail attachment (2) continues to move axially toward the connector (1), at which time the key strip (24) and the key slot (13) coincide with each other, thereby achieving the relative positioning of the connector (1) and the tail attachment (2); then the tail attachment (2) continues to move toward the connector (1) at the axial angle until the barb head (31) falls into the barb slot (21), thereby completing the directional assembly of the connector (1) and the tail attachment (2).

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