Overall injection molding dispensing sealing via hole connector

Abstract

The utility model discloses an integral injection molding dispensing sealing via hole connector, and solves the technical problem that a connection structure of a conductive terminal and a sheath insulator in a conventional via hole connector cannot give consideration to sealing performance and assembly clearance. The via hole connector comprises a conductive terminal and an integral injection molding insulator which are connected through integral injection molding, the conductive terminal is connected with the circuit board through a pin, the integral injection molding insulator is provided with an accommodating groove of the pin, and a sealing colloid is arranged in the accommodating groove. According to the utility model, the structure is simple, the number of parts is reduced, the assembly efficiency is improved, the problem of abnormal sound caused by assembly gaps among the parts is solved, the accommodating grooves are arranged at the pin joints of the integral injection molding insulator and the conductive terminals, and the sealing colloid is filled in the accommodating grooves, so that the problem that the sealing colloid is not easy to deform when the temperature changes under the long-term use condition is solved. And the sealing failure is caused by the difference of expansion coefficients of the conductive terminal and the sheath insulator.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive electrical connectors, in particular to an integrally molded and glue-sealed through-hole connector. Background Art

[0002] A through-hole connector is a connector that needs to pass through and be fixed in a sheet metal hole inside the vehicle body in an automotive power electronics system and is used to connect and disconnect circuits located on both sides of the sheet metal respectively. If the two regions separated by the sheet metal are a dry area and a wet area respectively, the through-hole connector must have a sealing function.

[0003] In the prior art, the conductive terminals and the sheath insulator in a through-hole connector are generally combined into an assembly by an assembly method or an integrally molded method. When using the assembly method, for occasions with sealing requirements, seals such as O-rings and plugs are usually used between the terminals and the sheath insulator. This makes the number of sub-components that need to be assembled later in the through-hole connector assembly large, the structure complex, reduces the assembly efficiency, and due to the assembly gaps between the sub-components, there is a risk of abnormal noise and loosening during long-term use. When using the integrally molded method, the conductive terminals and the sheath insulator are tightly combined into a whole through integral molding, without the need for O-rings and plugs, reducing the number of sub-components that need to be assembled later and eliminating the abnormal noise caused by assembly gaps.

[0004] Compared with the assembled through-hole connector, although the integrally molded through-hole connector has the above advantages, there are still some problems, mainly: the conductive terminals are made of metal, and the sheath insulator is made of plastic, and the difference in the expansion coefficients of metal and plastic is large. When the temperature changes, the seemingly tight combination between the conductive terminals and the sheath insulator will also produce slight misalignment and gaps, which may lead to the sealing failure between the conductive terminals and the sheath insulator under long-term use conditions. Summary of the Utility Model

[0005] Aiming at the deficiencies in the above background art, the utility model proposes an integrally molded and glue-sealed through-hole connector, which solves the technical problem that the connection structure between the conductive terminals and the sheath insulator in the existing through-hole connector cannot balance the sealing performance and the assembly gap.

[0006] The technical solution of this application is as follows:

[0007] An integrally molded and glue-sealed through-hole connector includes a conductive terminal and an integrally molded insulator connected by integral molding. The conductive terminal is connected to a circuit board through pins, and a receiving groove for the pins is provided on the integrally molded insulator, and a sealing colloid is provided in the receiving groove.

[0008] The via connector provided by this technical solution is connected to the sheet metal hole inside the vehicle body. The pins of the conductive terminals are connected to the circuit board at one end and to the sheet metal at the other end, and are used to connect and disconnect the circuits located on both sides of the sheet metal respectively. The conductive terminals and the integrally injection-molded insulator are connected together by integral injection molding. A receiving groove is provided at the connection between the integrally injection-molded insulator and the pins, and a sealing colloid is filled in the receiving groove to achieve the sealing between the pins of the conductive terminals and the integrally injection-molded insulator, so as to ensure that when the temperature changes, there will be no tiny misalignment and gaps between the conductive terminals and the integrally injection-molded insulator, and further ensure the sealing effect between the conductive terminals and the integrally injection-molded insulator under long-term use conditions.

[0009] Preferably, the conductive terminal includes a conductive contact surface provided with a round hole, and the round hole is connected with a bolt. A round hole is provided in the middle of the conductive terminal, and the bolt and the conductive terminal can be integrally combined by press riveting.

[0010] Preferably, the pins are arranged on two bending surfaces on both sides of the conductive contact surface, and through holes for integral injection molding are provided on both bending surfaces. The conductive terminal can be formed by stamping and bending a copper alloy sheet metal. The shape of the conductive terminal is U-shaped. The bending surfaces are located on both sides of the conductive contact surface. A plurality of pins are provided at the bottom of each bending surface, and the pins are evenly spaced along the bottom edge. During integral injection molding, the through holes on the two bending surfaces can be used to fill plastic.

[0011] Preferably, the conductive terminal is connected to the convex platform of the integrally injection-molded insulator, and the conductive contact surface protrudes from the top surface of the convex platform. The conductive contact surface is press riveted and connected to the bolt through the round hole, and the conductive contact surface, the bolt and the hole-type terminal on one side of the sheet metal are connected and matched through the bolt to achieve electrical connection.

[0012] Preferably, an annular groove surrounding the convex platform is provided on the integrally injection-molded insulator, and an end face sealing ring is connected in the annular groove. The end face sealing ring is used for the sealing between the via connector and the vehicle body sheet metal hole. The outer contour of the annular groove is the same as the shape of the sheet metal hole. The width of the annular groove is slightly smaller than the width of the end face sealing ring, and the two are in an interference fit to prevent the end face sealing ring from easily detaching from the annular groove.

[0013] Preferably, the end face sealing ring includes an outer sealing rib and an inner sealing rib. To enhance the sealing performance, an inner sealing rib and an outer sealing rib are respectively provided inside and outside the end face sealing ring to increase the friction between the annular groove and the end face sealing ring and prevent the end face sealing ring from detaching from the annular groove.

[0014] Preferably, both the annular groove and the end face sealing ring are rectangular in shape, and there is a protruding body on each of the inner and outer sides of each side of the end face sealing ring. To enhance the sealing performance, there is a protruding body on each of the inner and outer sides of each side of the end face sealing ring, and in the local area where the protruding body is located, the interference amount between the width of the sealing ring and the width of the groove is further increased to further prevent the sealing ring from easily disengaging from the groove.

[0015] Preferably, positioning posts for assisting in connecting to the circuit board are provided on the bottom surface of the integrally injection-molded insulator near the pins. The pins of the conductive terminals pass through the bottom surface of the integrally injection-molded insulator and are welded to the circuit board. The guiding function of the positioning posts can facilitate the guiding and positioning during the welding of the via connector to the circuit board. First, the circuit board is positioned through the positioning posts, and then the via connector is welded and fixed to the circuit board.

[0016] Preferably, lugs for connecting to the sheet metal are provided on the integrally injection-molded insulator, and a bushing is connected inside the lugs. The lugs are used for connecting and fixing the via connector to the sheet metal. A bushing is embedded in the lug area, which can facilitate bolt connection with the sheet metal.

[0017] Preferably, helical teeth are provided on the outer cylindrical surface of the bushing. The helical teeth can increase the firmness of the connection between the bushing and the integrally injection-molded insulator. The outer cylindrical surface of the bushing is provided with helical teeth around the entire circumference to prevent the bushing from disengaging from the integrally injection-molded insulator. The exposed bottom surface of the bushing should protrude from the integrally injection-molded insulator to prevent the threaded fastener from directly contacting the lug of the integrally injection-molded insulator and causing damage to the lug when the via connector is connected and fastened to the sheet metal.

[0018] Compared with the prior art, the technical solution disclosed by the present utility model has the following beneficial effects:

[0019] 1. In the present utility model, the conductive terminal and the integrally injection-molded insulator are first integrally and reliably connected through the integral injection molding method, and then a sealing colloid is filled between the pins of the conductive terminal and the integrally injection-molded insulator to achieve reliable sealing between the conductive terminal and the integrally injection-molded insulator, solving the technical problem that the connection structure between the conductive terminal and the sheath insulator in the existing via connector cannot balance the sealing performance and the assembly gap.

[0020] 2. Compared with the assembly method, the present utility model uses the integral injection molding method to reliably connect the conductive terminal and the integrally injection-molded insulator, reducing the number of sub-components that need to be assembled later, simplifying the structure of the via connector, improving the assembly efficiency, and solving the abnormal sound problem caused by the large number of sub-components and the assembly gap between the sub-components.

[0021] 3. Compared with the overall injection molding method, on the basis of overall injection molding, the present utility model improves the connection structure of overall injection molding, sets a receiving groove at the connection between the overall injection molded insulator and the pins of the conductive terminal, and fills the receiving groove with a sealing colloid, solving the problem of sealing failure between the conductive terminal and the overall injection molded insulator caused by the difference in expansion coefficients of the conductive terminal and the sheath insulator when the temperature changes under long-term use conditions. Brief Description of the Drawings

[0022] In order to more clearly illustrate the embodiments of the present utility model, the drawings required for description in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 is the perspective view of the via connector of the present utility model;

[0024] Figure 2 is the front view of the via connector of the present utility model;

[0025] Figure 3 is the rear view of the via connector of the present utility model;

[0026] Figure 4 is the top view of the via connector of the present utility model;

[0027] Figure 5 is the left view of the via connector of the present utility model;

[0028] Figure 6 is the transverse cross-sectional view of the via connector of the present utility model;

[0029] Figure 7 is the vertical cross-sectional view of the via connector of the present utility model;

[0030] Figure 8 is the exploded view of the via connector of the present utility model;

[0031] Figure 9 is Figure 1 the perspective view of the conductive terminal in

[0032] Figure 10 is Figure 1 the vertical cross-sectional view of the conductive terminal in

[0033] Figure 11 is Figure 1 the perspective view of the overall injection molded insulator in

[0034] Figure 12 isFigure 1 Front view of the integral injection-molded insulator in

[0035] Figure 13 is Figure 1 Left view of the integral injection-molded insulator in

[0036] Figure 14 is Figure 1 Bottom view of the integral injection-molded insulator in

[0037] Figure 15 is Figure 1 Cross-sectional view of the integral injection-molded insulator in

[0038] Figure 16 is Figure 1 Stereogram of the end face sealing ring in

[0039] Figure 17 is Figure 1 Cross-sectional view of the end face sealing ring in

[0040] Figure 18 is Figure 1 Cross-sectional view of the protrusion of the end face sealing ring in

[0041] Figure 19 is Figure 1 Stereogram of the bushing in

[0042] Explanation of the reference numerals in the drawings:

[0043] 1 Conductive terminal, 101 Round hole, 102 Conductive contact surface, 103 Pin, 104 Through hole, 2 Bolt, 3 Integral injection-molded insulator, 301 Annular groove, 302 Positioning post, 303 Lobe, 304 Sealing colloid, 4 End face sealing ring, 401 Outer sealing rib, 402 Inner sealing rib, 403 Protrusion, 5 Bushing, 501 Helical teeth. Specific implementation mode

[0044] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the core concept of the present invention and the following embodiments, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0045] Embodiment 1, an integral injection-molded and dot-sealed through-hole connector, as Figures 1 to 7 shown, includes a conductive terminal 1 and an integral injection-molded insulator 3 connected by integral injection molding. The conductive terminal 1 is connected to the circuit board through a pin 103. The integral injection-molded insulator 3 is provided with a receiving groove for the pin 103, and a sealing colloid 304 is provided in the receiving groove.

[0046] Specifically, the via connector is connected to the sheet metal hole inside the vehicle body. The pin 103 of the conductive terminal 1 is connected to the circuit board and the other end is connected to the sheet metal, which is used to connect and disconnect the circuits located on both sides of the sheet metal. The conductive terminal 1 and the integrally molded insulator 3 are connected together by integral molding. A receiving groove is provided at the connection between the integrally molded insulator 3 and the pin 103. The sealing colloid 304 is filled in the receiving groove to seal the pin 103 of the conductive terminal 1 and the integrally molded insulator 3, so as to ensure that when the temperature changes, there will be no tiny misalignment and gaps between the conductive terminal 1 and the integrally molded insulator 3, and thus ensure the sealing effect between the conductive terminal 1 and the integrally molded insulator 3 under long-term use conditions.

[0047] Furthermore, the sealing between the conductive terminal 1 and the integrally molded insulator 3 is achieved by integral molding and the sealing colloid 304. The sealing colloid 304 surrounds a certain range around the bending area where the pin 103 is located, and the exposed surface of the sealing colloid 304 is flush with the root of the pin 103. The sealing colloid 304 is tightly combined with the conductive terminal 1 and the integrally molded insulator 3 to play a sealing role.

[0048] Embodiment 2, based on Embodiment 1, an integrally molded and dot-sealed via connector, the conductive terminal 1 includes a conductive contact surface 102 provided with a round hole 101, and the round hole 101 is connected with a bolt 2. A round hole 101 is provided in the middle of the conductive terminal 1, and the bolt 2 and the conductive terminal 1 can be combined into a whole by press riveting. The press-riveted bolt 2 has a round head. After one end of the bolt 2 passes through the round hole 101 in the middle of the conductive terminal 1, the bolt 2 and the conductive terminal 1 are combined into a whole through the press riveting process, and then combined with the integrally molded insulator 3 through the integral molding process.

[0049] During use, the conductive terminal 1 and the bolt 2 are electrically connected to the hole-type terminal on one side of the sheet metal through bolt connection and cooperation, and the pin at the other end of the conductive terminal 1 is welded to the circuit board.

[0050] Embodiment 3, based on Embodiment 2, an integrally molded and dot-sealed via connector, the pins 103 are arranged on two bending surfaces on both sides of the conductive contact surface 102, and through holes 104 for integral molding are provided on both bending surfaces. The conductive terminal 1 can be formed by stamping and bending a copper alloy sheet metal. The shape of the conductive terminal 1 is U-shaped, the conductive contact surface 102 is a top plane, the bending surfaces are located on both sides of the conductive contact surface 102, the pins 103 are provided at the bottom of the bending surfaces, and several pins 103 are provided at the bottom of each bending surface, and the pins 103 are evenly spaced along the bottom edge. During integral molding, the through holes 104 on both bending surfaces are filled with the plastic for integral molding to strengthen the connection firmness between the conductive terminal 1 and the integrally molded insulator 3.

[0051] Example 4. Based on Example 3, an integral injection molding and dispensing sealed through-hole connector, wherein the conductive terminal 1 is connected to the convex platform of the integral injection molding insulator 3, and the conductive contact surface 102 protrudes from the top surface of the convex platform. The conductive contact surface 102 is press riveted to the bolt 2 through a round hole 101, and the conductive contact surface 102 and the bolt 2 are electrically connected by being connected and matched with the hole-type terminal on one side of the sheet metal through bolts. The conductive contact surface 102 should protrude from the top plane of the integral injection molding insulator 3 to prevent the top plane of the integral injection molding insulator 3 from interfering with the electrical contact between the hole-type terminal and the conductive contact surface 102, resulting in a virtual connection and making the connection more reliable.

[0052] Example 5. Based on any one of Examples 1-4, an integral injection molding and dispensing sealed through-hole connector, wherein an annular groove 301 surrounding the convex platform is provided on the integral injection molding insulator 3, and an end face sealing ring 4 is connected in the annular groove 301. The end face sealing ring 4 is used for sealing between the through-hole connector and the body sheet metal hole. The end face sealing ring 4 plays a sealing role under the compression of the sheet metal and the integral injection molding insulator 3. The outer contour of the annular groove 301 is the same as the shape of the sheet metal hole, and the width of the annular groove 301 is slightly smaller than the width of the end face sealing ring 4, and the two are in an interference fit to prevent the end face sealing ring 4 from easily detaching from the annular groove 301.

[0053] Example 6. Based on Example 5, an integral injection molding and dispensing sealed through-hole connector, wherein the end face sealing ring 4 includes an outer sealing rib 401 and an inner sealing rib 402. The outer sealing rib 401 and the inner sealing rib 402 are respectively arranged around the end face sealing ring 4 for one week, and the cross sections of the outer sealing rib 401 and the inner sealing rib 402 can be oval or other shapes. For the convenience of installation, the outer sealing rib 401 and the inner sealing rib 402 should have a certain slope. To enhance the sealing performance, the outer sealing rib 401 and the inner sealing rib 402 are respectively arranged inside and outside the end face sealing ring 4 to increase the friction force between the annular groove 301 and the end face sealing ring 4 and prevent the end face sealing ring from detaching from the annular groove.

[0054] Example 7. Based on Example 6, an integral injection molding and dispensing sealed through-hole connector, wherein the shapes of the annular groove 301 and the end face sealing ring 4 are both rectangular, and a protrusion 403 is provided on each of the inner and outer sides of each side of the end face sealing ring 4. The protrusion 403 is provided in the middle of each side of the end face sealing ring 4, and the protrusion 403 can be a dot or a vertical rib. To enhance the sealing performance, a protrusion 403 is provided on each of the inner and outer sides of each side of the end face sealing ring 4 to increase the friction force between the annular groove 301 and the end face sealing ring 4 and prevent the end face sealing ring 4 from detaching from the annular groove 301.

[0055] Embodiment 8. Based on Embodiment 5, an integrally molded dispensing-sealed via connector. On the bottom surface of the integrally molded insulator 3 close to the pin 103, there are positioning posts 302 for assisting in connecting to the circuit board. The pin 103 of the conductive terminal 1 passes through the bottom surface of the integrally molded insulator 3 and is welded to the circuit board. The positioning posts 302 can first position the circuit board to facilitate subsequent welding and fixing. Further, at least two positioning posts 302 are provided. When two are provided, the positioning posts 302 are respectively arranged at two diagonals on the bottom surface of the integrally molded insulator 3 to prevent the circuit board from tilting, shaking or shifting.

[0056] Embodiment 9. Based on Embodiment 5, an integrally molded dispensing-sealed via connector. On the integrally molded insulator 3, there are lugs 303 for connecting to the sheet metal, and a bushing 5 is connected inside the lugs 303. The lugs 303 are used for connecting and fixing the via connector to the sheet metal. The bushing 5 is pre-embedded in the lug 303 area, which can facilitate bolt connection with the sheet metal. Further, the lugs 303 are arranged at the four corners of the integrally molded insulator 3, and the positions of the four lugs 303 match the shape of the sheet metal, which can effectively fix the via connector on the sheet metal.

[0057] Embodiment 10. Based on Embodiment 9, an integrally molded dispensing-sealed via connector. On the outer cylindrical surface of the bushing 5, there are helical teeth 501. The helical teeth 501 can increase the firmness of the connection between the bushing 5 and the integrally molded insulator 3. The helical teeth 501 are provided in a full circle on the outer cylindrical surface of the bushing 5 to prevent the bushing 5 from slipping out of the integrally molded insulator 3. To prevent the lug 5 of the integrally molded insulator 3 from being damaged by the direct contact of the threaded fastener with the lug 5 of the integrally molded insulator 3 when the via connector is connected and fastened to the sheet metal, the bottom exposed surface of the bushing 5 should protrude from the integrally molded insulator 3.

[0058] The details not elaborated in the present utility model are all well-known conventional technical means in the art.

[0059] The above content shows and describes the basic principles, main features and the beneficial effects of the present utility model. The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. An integrally injection-molded dispensing and sealing via-hole connector, characterized in that: It includes a conductive terminal (1) and an integrally injection-molded insulator (3) connected by integral injection molding. The conductive terminal (1) is connected to a circuit board through a pin (103). An accommodation groove for the pin (103) is provided on the integrally injection-molded insulator (3), and a sealing colloid (304) is provided in the accommodation groove.

2. The integral injection dispensing and sealing via-hole connector according to claim 1, wherein: The conductive terminal (1) includes a conductive contact surface (102) provided with a round hole (101), and the round hole (101) is connected to a bolt (2).

3. The integral injection dispensing and sealing via-hole connector according to claim 2, wherein: The pin (103) is provided on two bent surfaces on both sides of the conductive contact surface (102), and through holes (104) for integral injection molding are provided on both bent surfaces.

4. The integral injection dispensing and sealing via-hole connector according to claim 3, characterized in that: The conductive terminal (1) is connected to a boss on the integrally injection-molded insulator (3), and the conductive contact surface (102) protrudes from the top surface of the boss.

5. The integral injection dispensing and sealing via-hole connector according to claim 4, characterized in that: An annular groove (301) surrounding the boss is provided on the integrally injection-molded insulator (3), and an end face sealing ring (4) is connected in the annular groove (301).

6. The integral injection and dispensing sealed via-hole connector according to claim 5, wherein: The end face sealing ring (4) includes an outer sealing rib (401) and an inner sealing rib (402).

7. The integral injection dispensing and sealing via-hole connector according to claim 6, wherein: The shapes of the annular groove (301) and the end face sealing ring (4) are both rectangular, and a protrusion (403) is provided on each of the inner and outer sides of each side of the end face sealing ring (4).

8. The integral injection dispensing and sealing via-hole connector according to claim 5, wherein: Positioning posts (302) for assisting in connecting to the circuit board are provided on the bottom surface of the integrally injection-molded insulator (3) near the pin (103).

9. The integral injection dispensing and sealing via-hole connector according to claim 5, wherein: Lugs (303) for connecting to a sheet metal are provided on the integrally injection-molded insulator (3), and a bushing (5) is connected in the lugs (303).

10. The integral injection dispensing and sealing via-hole connector according to claim 9, wherein: Helical teeth (501) are provided on the outer cylindrical surface of the bushing (5).

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