Rolling line pressing contact element and connector using same

Abstract

The utility model relates to a rolling line pressing contact and a connector using the same, the contact comprises a contact main body, a connection part and a crimping wing which are integrally formed by rolling from head to tail, and a rubber sealing body which is in interference sealing fit with an insertion cavity of an adaptive connector shell is coated on the connection part in a plastic package manner. The connector comprises a connector shell and a rolled line pressing contact piece arranged in an insertion cavity of the connector shell, and a rubber sealing body is plastically packaged on the rolled line pressing contact piece, so that after the rolled line pressing contact piece is arranged in the connector, the self-sealing function of the connector is realized through interference fit between the rolled line pressing contact piece and the insertion cavity of the connector.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of connector, specifically speaking is a kind of roll press line contact and the connector using the contact. BACKGROUND

[0002] Photovoltaic power generation can convert light energy in nature into clean electric energy to replace traditional thermal power generation, which can greatly reduce the pollution of thermal power generation process to the environment. Since the photovoltaic connector is used in outdoor harsh environment for a long time, usually more than ten years, the reliability and safety of the connector product are very high. As an important way for photovoltaic inverter and external communication, if the sealing performance of photovoltaic connector is poor, water and dust will enter the connector, which will bring serious safety hazard. Therefore, photovoltaic equipment must ensure good sealing performance at all electrical connector interfaces to work normally.

[0003] There are two sealing methods for photovoltaic inverter board end connector in the market according to application scenarios:

[0004] (1) when the socket and plug are full, the sealing function is realized by the O-ring of the plug and the sealing pad of the socket;

[0005] (2) when the socket is not full, the sealing function is realized by adding a silicone rubber protective cap on the socket without plug.

[0006] Both of these two methods have their natural defects: once the plug is pulled out or the protective cap is pulled off or the protective cap is not installed after being pulled out, the inverter will be directly connected with the outside, losing the ability to block water vapor and dust from entering the inverter, and further causing corrosion and even short circuit of the inverter and other electrical equipment, resulting in greater loss.

[0007] There is also a connector that adds an O-ring on the machined contact or adds a glue injection to realize the sealing function. This structure has high cost and complex process, and is difficult to popularize in large quantities. CONTENT OF THE UTILITY MODEL

[0008] To solve the above technical problems, the utility model provides a kind of roll press line contact and the connector using the contact, and the rubber sealing body is molded on the roll press line contact, so that the roll press line contact is installed in the connector, and the self-sealing function of the connector is realized by the interference fit with the plug cavity of the connector.

[0009] To achieve the above technical purpose, the technical scheme adopted is: a kind of roll press line contact, including contact body, connecting part and pressure contact wing which are integrally formed by rolling from head to tail, and the connecting part is molded and covered with rubber sealing body which is interference sealed with the plug cavity of the adapter connector shell.

[0010] The middle part of the connecting part is provided with an annular supporting structure which is plasticly sealed inside the rubber sealing body.

[0011] The annular supporting structure is provided with a plurality of through holes in the circumferential direction.

[0012] The rubber sealing body is provided with an annular protruding rib on the surface in contact with the insertion cavity of the adapter connector housing.

[0013] The top of the annular protruding rib is a circular arc surface.

[0014] The head side and / or tail side of the rubber sealing body extends out the first and / or second cladding layers wrapped on the surface of the connecting part.

[0015] The cavity surface of the rubber sealing body and the insertion cavity is a mirror surface treatment matching surface.

[0016] A connector comprises a connector housing and a rolled crimped contact piece arranged in the insertion cavity of the connector housing, and the rolled crimped contact piece is the above-mentioned rolled crimped contact piece.

[0017] The tail part of the connector housing is used for mounting on a mounting panel, and the connector housing is provided with a threaded structure matched with a nut.

[0018] A sealing gasket is mounted between the mounting panel and the connector housing.

[0019] The utility model has the advantages of:

[0020] 1. Without changing the existing main structure of the rolled crimped contact piece, the rubber sealing body plasticly sealed on the connecting part of the contact piece is added, and the self-sealing effect of the connector is realized with the integrated installation of the contact piece, the cost is low, the structure is simple, the sealing effect is good, the part of the contact piece is located at the connecting part between the main body of the contact piece and the crimping wing, the protection effect of the connecting part is realized to prevent deformation, the friction stroke of the rubber sealing body is reduced, and the influence on the insertion force is reduced as much as possible.

[0021] 2. The annular supporting structure plays a role in strengthening the support of the rubber sealing body, prevents the sealing body from being excessively deformed due to friction force when the sealing body is inserted into the inside of the housing, causes sealing failure, enhances the bonding force of the rubber sealing body and the contact piece, prevents the rubber sealing body from being completely detached and moved due to insufficient bonding force during the installation process, and causes sealing failure; at the same time, the annular supporting structure effectively prevents deformation at the tail part, prevents the rubber sealing body from being deformed together with the crimping wire, and causes sealing failure.

[0022] 3. The through hole is added to the annular support structure, so that the liquid silicone rubber can flow into the annular support structure through the through hole during the plastic sealing process, the silicone rubber flow forming is utilized to accelerate the plastic sealing speed and improve the production efficiency.

[0023] 4. The plurality of convex ribs reduce the contact between the rubber sealing body and the shell, reduce the friction, reduce the terminal insertion force, improve the installer experience, and the convex ribs have a sealing effect, which can reduce the failure possibility when the contact member is deflected.

[0024] 5. The top of the convex rib is designed as a circular arc surface, which is convenient for insertion and stable deformation.

[0025] 6. The first and second covering layers are integrally formed with the plastic sealing body on the head and tail sides of the rubber sealing body, which are used to increase the covering length of the rubber sealing body and the contact member, and further enhance the bonding force between the rubber sealing body and the contact member.

[0026] 7. The cavity surface of the interference seal is mirror finished, which can reduce the friction between the rubber sealing body and the shell, reduce the insertion difficulty, and make the rubber sealing body and the shell interference seal surface cooperate closely, so that the sealing performance is improved.

[0027] 8. The connector made of the above-mentioned rolled and pressed wire contact does not need O-ring or protective cap, and does not need to pour glue, so that the sealing can be completed, the cost is reduced, the process steps are saved, and the water vapor and dust from the gap between the contact and the shell enter the inverter.

[0028] 9. The tail end of the connector is provided with a threaded structure, which is convenient for installation between the mounting panel and the shell.

[0029] 10. The gasket is added between the mounting panel and the shell, which can increase the sealing performance of the connector. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a structural schematic view of a male connector;

[0031] Figure 2 is an exploded view of Figure 1

[0032] Figure 3 is a structural schematic view of a rolled and pressed wire contact in Figure 1

[0033] Figure 4 is an exploded view of Figure 3

[0034] Figure 5 is a structural schematic view of a female connector;

[0035] Figure 6 is an exploded view of Figure 5 ​​​exploded view;

[0036] Figure 7 for Figure 5 structure diagram of the crimped wire contact in the connector;

[0037] Figure 8 for Figure 7 exploded view;

[0038] In the figure: 1, crimped wire contact, 2, connector housing, 3, nut, 4, gasket, 5, mounting panel, 6, O-ring, 11, contact body, 12, adapter, 13, crimping wing, 14, positioning claw, 15, rubber sealing body, 121, annular support structure, 1211, through hole, 151, annular convex rib, 152, first cladding layer, 153, second cladding layer. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and not to limit the present application.

[0040] It should be noted that the diagrams provided in the embodiments only illustrate the basic concept of the present application in a schematic manner, and only the components related to the present application are shown in the diagrams, not drawn according to the number, shape and size of the components in actual implementation. The shape, number and proportion of each component in actual implementation can be changed arbitrarily, and the component layout pattern can also be more complex.

[0041] The structure, proportion, size, etc. shown in the drawings attached to the present specification are only used to understand and read the content disclosed in the specification by those skilled in the art, and are not used to limit the limiting conditions that the present application can be implemented. Therefore, any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect that the present application can produce and the purpose that the present application can achieve, should still fall within the scope of the technical content disclosed by the present application.

[0042] The orientations or positional relationships indicated by the terms such as "upper", "lower", "left", "right", "intermediate", "vertical", "horizontal", "inner", "outer", "radial", "circumferential", etc. in the present specification are based on the orientations or positional relationships shown in the drawings, and are only used to simplify the description, and cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation. Therefore, it cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are only used to distinguish similar objects, and cannot be understood as a specific order or sequence, and it should be understood that such use can be interchanged under appropriate circumstances.

[0043] A crimped wire contact includes a contact body 11, a connecting portion 12 and a crimping wing 13 integrally formed by crimping from head to tail, wherein the head direction refers to the plug-in direction and the tail direction refers to the direction of connecting a cable. The contact body 11 is a pin-shaped contact body for a male connector as shown in Figure 3 or a socket-shaped contact body for a female connector as shown in Figure 7 . As shown in Figure 1 , Figure 5 , a positioning claw 14 can also be installed in the contact body 11 and fixed to the step inside the socket of the connector housing 2 by the elastic sheet opened on the positioning claw 14, and the cooperation between the elastic sheet and the step inside the connector housing 2 prevents the contact from being pulled out from the tail of the connector housing 2. The connecting portion 12 is usually a semicircular curved structure formed by crimping. The crimping wing 13 is usually a U-shaped structure for pressing into a cable for welding connection, and the shape of the crimping wing 13 is not limited.

[0044] As shown in Figure 1 , Figure 3 , Figure 5 , Figure 7 , a rubber sealing body 15 that fits the socket of the adapter connector housing 2 is molded on the connecting portion 12, and the diameter of the rubber sealing body 15 is designed to be in interference with the socket of the adapter connector housing 2 when the contact body 11 is inserted in place, and the inner wall of the socket for interference is the sealing body fitting surface. The rubber sealing body 15 is elastic and can fill the gap between two parts to achieve the sealing function, and the optimal choice is a silicone rubber sealing body. The length of the rubber sealing body 15 ensures the sealing effect, but also cannot be too long to affect the insertion, and the length is designed according to the actual situation. The length of the sealing body fitting surface should be considered in terms of the amount of movement between the contact and the housing, and the sealing body should not exceed the fitting surface in the limit left or right state of the contact to ensure that the sealing body can still function normally in the limit state of the connector. The rubber sealing body 15 is arranged between the crimping wing 13 and the contact body 11, which can reduce the friction stroke of the rubber sealing body 15 inside the connector housing 2, reduce the insertion force of the contact into the connector housing 2, and improve the user's installation operation experience. And because the connecting portion 12 is thin and easy to deform, the rubber sealing body 15 plays a certain supporting role to prevent deformation of the connecting portion during insertion.

[0045] Further, as shown in Figure 4 , Figure 8As shown, the middle part of the adapter 12 is provided with an annular support structure 121, which is molded inside the rubber sealing body 15. The annular support structure 121 is integrally formed with the adapter 12, which is convenient for rolling and forming, and can provide the maximum support force. The annular support structure 121 is molded inside the rubber sealing body 15, which can provide support for the sealing body. When the rubber sealing body 15 is inserted into the connector housing 2, it can prevent the rubber sealing body 15 from being deformed due to friction, which can cause sealing failure. At the same time, it can also enhance the bonding force between the rubber sealing body 15 and the crimped wire contact 1, prevent the rubber sealing body 15 from being deformed due to insufficient bonding force between the rubber sealing body 15 and the crimped wire contact 1 during installation, and prevent the rubber sealing body 15 from being deformed due to insufficient bonding force between the rubber sealing body 15 and the crimped wire contact 1 during installation. When the crimped wing 13 is crimped, it can effectively prevent deformation at this position, prevent the rubber sealing body 15 from being deformed with the crimped wire, and cause sealing failure.

[0046] Further, the annular support structure 121 is provided with a plurality of through holes 1211 in the circumferential direction. The number and shape of the through holes 1211 are set as needed. Figure 4 、 Figure 8 As shown, four circular through holes are designed in the upper and lower and left and right directions of the annular support structure 121. The purpose is to allow liquid silicone rubber to flow into the annular support structure 121 during molding, which is beneficial to the flow forming of silicone rubber, accelerates the molding speed, and improves the production efficiency.

[0047] Further, the surface of the rubber sealing body 15 in contact with the insertion cavity of the adapter connector housing 2 is provided with an annular rib 151. The number of annular ribs 151 is adjusted and designed according to the structure of the contact. Figure 4 、 Figure 8 As shown, the three annular ribs 151 have consistent spacing and consistent height. Compared with a cylindrical sealing plug, the annular rib structure greatly reduces the contact area with the insulator, greatly reduces the friction force, and further reduces the terminal insertion force, thereby improving the experience of the installer. The three annular rib structures have the sealing effect of three O-rings, which can reduce the possibility of sealing failure when the contact is deflected. The top of the annular rib 151 is a circular arc surface, which is convenient for stable deformation during insertion and extrusion, and will not be deformed excessively or difficult to insert.

[0048] Further, the head side and / or the tail side of the rubber seal 15 extends out of the first coating layer 152 and / or the second coating layer 153 wrapped on the surface of the adapter 12, that is, there are three cases: (1) the head side of the rubber seal 15 extends out of the first coating layer 152 wrapped on the surface of the adapter 12; (2) the tail side of the rubber seal 15 extends out of the second coating layer 153 wrapped on the surface of the adapter 12; (3) the head side and the tail side of the rubber seal 15 extend out of the first coating layer 152 and the second coating layer 153 wrapped on the surface of the adapter 12. The extended coating layer increases the coating length of the rubber seal 15 and the contact piece, thereby increasing the bonding force between the seal and the contact piece. The thickness and length of the first coating layer 152 and the second coating layer 153 can be adjusted as needed, for example, in the shape of a U. According to the contact piece structure in Figure 3 、 Figure 7 , the first coating layer 152 is short in length and close to the contact piece body 11, and the longer second coating layer 153 is close to the crimping wing 13. The top of the adapter 12 close to the crimping wing 13 is beveled, and will be deformed to a certain extent during the actual crimping process, which can effectively follow the deformation of the contact piece and reduce the impact on the seal body.

[0049] Further, the rubber seal 15 is in interference fit with the cavity surface of the insertion cavity, and the cavity surface is a mirror-finished mating surface. The mirror-finished rubber seal mating surface reduces friction, thereby reducing the insertion force of the contact piece. The mirror-finished seal mating surface cooperates more closely with the rubber seal 15, and the sealing performance is better.

[0050] As shown in Figure 1 、 Figure 2 、 Figure 5 、 Figure 6 , a connector includes a connector housing 2 and a crimped crimping contact piece 1 arranged in the insertion cavity of the connector housing 2. The connector is not limited to a male connector or a female connector, nor is it limited to a single-core connector or a multi-core connector. The crimped crimping contact piece 1 is the crimped crimping contact piece described above, and the structure of the crimped crimping contact piece 1 is not described again. The rubber seal forms an integral component with the crimped crimping contact piece 1, and after being inserted into the connector housing 2 with the crimped crimping contact piece 1, the self-sealing function of the connector is realized through the interference fit with the sealing mating surface of the connector housing 2.

[0051] As shown in Figure 1 、 Figure 5As shown, further, the tail of the connector housing 2 is used to be mounted on the mounting panel 5, and the connector housing 2 is provided with a threaded structure matched with the nut 3. The sealing gasket 4 is mounted between the mounting panel 5 and the connector housing 2. The socket is fixed to the user equipment mounting panel 5 by the threaded cooperation of the nut 3 with the inner threaded feature and the connector housing 2 with the outer threaded feature, and the sealing gasket 4 is mounted between the connector housing 2 and the mounting panel 5 to realize the sealing function between the connector housing 2 and the mounting panel 5.

[0052] In combination Figure 1 and Figure 5 Both of the two connectors set the sealing body at the position between the contact tail crimping wing and the contact main body, and when the contact is assembled to the housing, the sequence of the contact parts entering the housing is: the front end enters the housing first, then the positioning claw enters, and finally the sealing body enters, and when the positioning claw is in place, the sealing body is also installed in place, and this design can reduce the friction stroke of the sealing body in the housing, minimize the influence of the insertion force caused by the sealing body, and improve the user installation operation experience.

[0053] The above is only a preferred example of the utility model, and is not used for limiting or defining the utility model. For researchers or technicians in the field, the utility model can have various changes and variations. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope declared by the utility model.

Claims

1. A rolled crimping contact, comprising a contact body (11) integrally rolled from beginning to end, a connecting portion (12), and a crimping wing (13), characterized in that: The connecting part (12) is covered with a rubber seal (15) that is interference-sealed with the cavity of the adapter connector housing (2).

2. A coiled crimping contact as described in claim 1, characterized in that: The connecting part (12) is provided with an annular support structure (121) in the middle, and the annular support structure (121) is encapsulated inside the rubber seal (15).

3. A coiled crimping contact as described in claim 2, characterized in that: The ring support structure (121) is provided with several through holes (1211) along the circumferential direction.

4. A coiled crimping contact as described in claim 1, characterized in that: The surface of the rubber seal (15) that contacts the cavity of the adapter connector housing (2) is provided with annular ribs (151).

5. A coiled crimping contact as described in claim 4, characterized in that: The top of the annular rib (151) is an arc surface.

6. A coiled crimping contact as described in claim 1, characterized in that: The rubber seal (15) extends from the head side and / or tail side to form a first covering layer (152) and / or a second covering layer (153) that wraps around the surface of the joint (12).

7. A coiled crimping contact as described in claim 1, characterized in that: The rubber sealing body (15) and the cavity surface of the interference seal are mirror-finished mating surfaces.

8. A connector, comprising a connector housing (2) and a coiled crimping contact (1) disposed within a cavity of the connector housing (2), characterized in that: The coiled crimping contact (1) is the coiled crimping contact described in any one of claims 1-7.

9. A connector as described in claim 8, characterized in that: The tail of the connector housing (2) is used to be mounted on the mounting panel (5), and the connector housing (2) is provided with a threaded structure that cooperates with the nut (3).

10. A connector as described in claim 9, characterized in that: A sealing gasket (4) is installed between the mounting panel (5) and the connector housing (2).

Images