CN212230660U - Structure for increasing creepage distance at butt joint of contact pins of connector - Google Patents

Abstract

The utility model discloses an increase structure of connector contact pin butt joint department creepage distance belongs to connector technical field. The composition structure comprises: the device comprises a positive electrode connector, a positive electrode contact pin, a negative electrode connector and a negative electrode contact pin; the positive contact pin is embedded in the positive connector, and the negative contact pin is embedded in the negative connector; the positive electrode connector is connected with the negative electrode connector in an inserting mode, the positive electrode contact pin is connected with the negative electrode contact pin in an inserting mode, a top groove is formed between the inner wall of the positive electrode connector and the outer circle of the butt joint of the contact pins, and a bottom groove is formed between the inner wall of the negative electrode connector and the outer circle of the butt joint of the contact pins. The utility model discloses utilize groove structure not increasing connector length and maintaining under the condition of each other inserting, effectively increased electrified body to the creepage distance to inserting sealed point, realized that the air blocks, satisfy the demand of superpressure performance. The structure is simple, the whole size is small, the voltage resistance is strong, the manufacture and the assembly are easy, and the connection is reliable.

Description

Structure for increasing creepage distance at butt joint of contact pins of connector

Technical Field

The utility model belongs to the technical field of the connector, a AC connector that photovoltaic system used is related to, especially a can increase structure of connector contact pin butt joint department creepage distance.

Background

The AC connector for the photovoltaic system is a connecting device which is arranged between an inverter and a load device and has the functions of current transmission and safety protection. For electrical safety of the connector, there are strict regulations on creepage distances in the product standards. Creepage distance refers to the shortest path between two conductive parts or between a conductive part and an equipment protection interface measured along an insulating surface. Photovoltaic connector is inside to dock through the contact pin, needs the external insulation protective housing to prevent the destruction of external materials such as dust to the contact pin. The creepage distance of the photovoltaic connector refers to the shortest distance from the butt joint of the contact pins to the insulating shell of the connector. The creepage distance of the photovoltaic connector is mainly used for preventing creepage tracks or arc discharge caused on an insulating material of the photovoltaic connector under a certain system working voltage, and if the creepage distance of the photovoltaic connector is designed to be insufficient, creepage tracks or direct breakdown can occur to cause short circuit. In the existing photovoltaic connector, the distance between the contact pin and the insulating shell is limited, so that the creepage distance at the butt joint of the contact pin of the existing connector is short, and the stability and the reliability of the connector in use are low. Some manufacturers increase the creepage distance by lengthening and increasing the volume of the connector, but have the defects of complex structural design, difficult production and manufacture, troublesome assembly and the like; and the excessive creepage distance will cause the waste of material and increase the production cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the not enough of existence among the prior art, provide an increase structure of connector contact pin butt joint department creepage distance, its compact structure easily makes and assembles, can increase the creepage distance between contact pin butt joint department and the connector housing, improves electrical safety level, improves the stability and the reliability of connector, and need not increase the product volume.

The technical scheme of the utility model as follows:

a structure for increasing creepage distance at the butt joint of connector pins comprises a positive electrode joint, a positive electrode pin, a negative electrode joint and a negative electrode pin; the positive contact pin is embedded in the positive connector, and the negative contact pin is embedded in the negative connector; a backstop mechanism is arranged in the negative electrode joint, and the top of the positive electrode joint is inserted into the negative electrode joint to the backstop mechanism so that the positive electrode joint is inserted into the negative electrode joint; the positive contact pin and the negative contact pin are spliced, a bottom groove is arranged between the butt joint of the contact pins and the inner wall of the negative connector, and a top groove is arranged between the butt joint of the contact pins and the inner wall of the positive connector; the top groove is arranged on the inner circle at the top of the anode connector, and the bottom groove is arranged between the retaining mechanism of the cathode connector and the inner wall of the cathode connector.

Preferably, the positive electrode joint and the negative electrode joint are both plastic parts.

Preferably, the positive electrode connector and the negative electrode connector are respectively provided with a retaining mechanism inside, the positive electrode contact pin is clamped with the retaining mechanism in the positive electrode connector, and the negative electrode contact pin is clamped with the retaining mechanism in the negative electrode connector.

The utility model has the beneficial technical effects that:

according to the above technical scheme, the utility model discloses mainly be through the design of the top recess between circle and the contact pin butt joint department excircle in the top that the positive pole connects and the bottom recess between the bottom inner wall that the negative pole connects and the contact pin butt joint department excircle, under the condition of injecing the space, utilize a plurality of groove structure not increasing connector length and maintaining under the condition of each other inserting, effectively increased the creepage distance of electrified body to the sealed point of inserting, realized the air and blocked, satisfy the demand of superpressure performance. The structure is simple, the whole size is small, the voltage resistance is strong, the manufacture and the assembly are easy, and the connection is reliable.

Advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is an exploded view of a connector.

Fig. 2 is an opposite view of the connector.

Fig. 3 is a block diagram of a pin interface.

Figure 4 is a view of the location and configuration of the bottom recess.

FIG. 5 is a view of the location and configuration of the top groove.

The various labels in the figure define: 101-O-shaped ring, 102-positive electrode joint, 103-backstop ring, 104-positive electrode pin, 105-T-shaped sleeve, 106-basket of flowers, 107-nut, 108-positive electrode cable, 109-backstop mechanism, 110-top groove, 201-negative electrode joint, 202-backstop ring, 203-negative electrode pin, 204-T-shaped sleeve, 205-basket of flowers, 206-nut, 207-negative electrode cable, 208-backstop mechanism and 209-bottom groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Fig. 1 shows an exploded view of a connector. Fig. 2 shows a plug-in view of the connector. Referring to fig. 1 and 2, the connector is divided into a positive connector and a negative connector. At the positive connector, an O-ring 101 is sleeved on the end of the positive connector 102, the positive connector 102 and the O-ring 101 are both plastic pieces, and the O-ring 101 plays a role of sealing when the positive connector 102 and the negative connector 201 are inserted into each other. The positive electrode pin 104 is engaged with the retaining ring 103, and the retaining ring 103 is engaged with the positive electrode terminal 102. The positive pin 104 has a conductive function, the retaining ring 103 is an elastic metal piece, a hook is arranged on the periphery of the positive pin 104, a corresponding slot is also arranged on the periphery of the retaining ring 103, and the hook of the positive pin 104 falls into the slot of the retaining ring 103 to clamp and position the positive pin and the retaining ring. Because the circle of the retaining ring 103 is provided with an inclined surface, and the inner circle of the positive electrode connector 102 is also provided with a corresponding retaining mechanism, the upper end of the retaining ring 103 enters the retaining mechanism of the positive electrode connector 102, and the inclined surface is abutted against the inclined surface, namely the inclined surface and the inclined surface are clamped and positioned. The positive cable 108 is riveted to the positive pin 104. The T-shaped sleeve 105, the flower basket 106 and the nut 107 are sequentially nested on the positive cable 108 and the positive connector 102. The end of the T-shaped sleeve 105 is provided with an annular part and a boss, the inner circle of the annular part is connected with the positive cable 108, and the annular part itself is inserted into a gap between the inner wall of the annular table on the positive connector 102 and the positive cable 108. The flower basket 106 is a plastic piece, one end of the flower basket 106 is abutted between the annular table and the threaded portion of the positive electrode connector 102, and the other end of the flower basket 106 has a claw-shaped structure which is fastened with the T-shaped sleeve 105. The nut 107 is a plastic piece, an inner circle of the nut 107 is provided with an internal thread, an outer circle of a thread part of the positive electrode joint 102 is provided with an external thread, the nut 107 and the nut are connected and locked through the threads, the nut 107 pushes the flower basket 106 to advance towards the screwing-in direction of the nut 107, the annular part of the T-shaped sleeve 105 is inserted into the position, meanwhile, the inner wall of the nut 107 interferes with the tail part of the flower basket 106, the claw-shaped structure at the tail part of the flower basket 106 is pushed to tightly grasp the T-shaped sleeve 105, and the T-. At the negative connector, the assembly is substantially the same as that of the positive connector except that one O-ring is omitted, and thus the description is omitted.

Fig. 3 shows the configuration of the mating interface of the connector pins, fig. 4 shows the position and configuration of the bottom recess, and fig. 5 shows the position and configuration of the top recess. Referring to fig. 3, 4 and 5, the positive pin 104 is embedded in the positive connector 102 and the negative pin 203 is embedded in the negative connector 201. The positive electrode tab 102 and the negative electrode tab 201 are both plastic parts. The positive electrode tab 102 is inserted into the negative electrode tab 201 in such a manner that the top of the positive electrode tab 102 is inserted into the negative electrode tab 201. Meanwhile, the positive pin 104 in the positive connector 102 is also plugged with the negative pin 203 in the negative connector 201. The butt joint of the positive pin 104 and the negative pin 203 is the limit position where the positive connector 102 can extend into the negative connector 201, i.e. the top of the positive connector 102 and the middle of the negative connector 201.

Referring to fig. 3 and 4, a retaining mechanism 208 is arranged in the middle of an inner circle of the negative electrode tab 201, an inclined surface is arranged on the periphery of the retaining ring 202 where the negative electrode pin 203 is located, the periphery of the retaining mechanism 208 is also provided with a corresponding inclined surface, the negative electrode pin 203 and the retaining ring 202 are pushed into the retaining mechanism 208, the inclined surfaces abut against the inclined surfaces, the negative electrode pin 203 and the retaining ring 202 are limited to be pushed forward continuously, the retaining ring 202 and the retaining mechanism 208 can be clamped, and the clamping and positioning of the negative electrode pin 203 in the negative electrode tab 201 are realized. Referring again to fig. 3 and 4, a bottom recess 209 is formed by hollowing between the inner wall of the negative electrode tab 201 and the outer circumference of the retaining mechanism 208. The purpose of the bottom recess 209 is to increase the creepage distance for the pin mating interface to the connector housing.

Referring to fig. 3 and 5, the middle portion of the positive electrode connector 102 is also provided with a retaining mechanism 109, an inclined surface is arranged on the peripheral side of the retaining ring 103 where the positive electrode pin 104 is located, the peripheral side of the retaining mechanism 109 is also a corresponding inclined surface, the positive electrode pin 104 and the retaining ring 103 are pushed into the retaining mechanism 109, the inclined surface abuts against the inclined surface, the positive electrode pin 104 and the retaining ring 103 are limited from being pushed forward continuously, the retaining ring 103 and the retaining mechanism 109 can be clamped, and the clamping and positioning of the positive electrode pin 104 in the positive electrode connector 102 are realized. Referring to fig. 3 and 5, the top of the positive tab 102 is sunk to form a top groove 110, and the top groove 110 is disposed between the inner wall of the positive tab 102 and the outer circle of the pin interface. The top recess 110 functions to increase the creepage distance from the pin interface to the connector housing.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (3)

1. The utility model provides an increase structure of connector contact pin butt joint department creepage distance which characterized in that: the device comprises a positive electrode connector, a positive electrode contact pin, a negative electrode connector and a negative electrode contact pin; the positive contact pin is embedded in the positive connector, and the negative contact pin is embedded in the negative connector; a backstop mechanism is arranged in the negative electrode joint, and the top of the positive electrode joint is inserted into the negative electrode joint to the backstop mechanism so that the positive electrode joint is inserted into the negative electrode joint; the positive contact pin and the negative contact pin are spliced, a bottom groove is arranged between the butt joint of the contact pins and the inner wall of the negative connector, and a top groove is arranged between the butt joint of the contact pins and the inner wall of the positive connector; the top groove is arranged on the inner circle at the top of the anode connector, and the bottom groove is arranged between the retaining mechanism of the cathode connector and the inner wall of the cathode connector.

2. The structure for increasing creepage distance at the butt joint of the connector pins as claimed in claim 1, wherein: the positive electrode joint and the negative electrode joint are plastic parts.

3. The structure for increasing creepage distance at the butt joint of the connector pins as claimed in claim 1, wherein: and the positive electrode connector and the negative electrode connector are respectively internally provided with a retaining mechanism, the positive electrode contact pin is clamped with the retaining mechanism in the positive electrode connector, and the negative electrode contact pin is clamped with the retaining mechanism in the negative electrode connector.

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