A sealed insulation structure for connecting a flat flexible wiring harness with a round cable

Abstract

The present invention relates to the field of wire harness sealing technology, and discloses a sealed insulating structure for connecting a flat flexible wire harness and a round cable, wherein the end face of the inner card shell is provided with a positioning hole, and the inner cavity of the inner card shell is provided with a hollow cavity in the shape of a mesh hole, and when the outer injection molded shell is injection molded, the injection molding material fills the inner cavity of the inner card shell through the positioning hole and the hollow cavity. Through injection molding, the interior of the inner card shell can also be filled with injection molding material to prevent the inner card shell from collapsing during injection molding, thereby supplementing the supporting strength of the inner card shell during injection molding and improving the internal waterproof strength, and achieving secondary waterproofing with a silicone sealing sheet. It is economical, and the cost of the connector is reduced and costs are saved by integrally molding the inner card shell and the outer injection molded shell; it has good waterproof properties, and by providing a silicone sealing sheet and an injection molding structure, there are two waterproof structures, which have good waterproof performance.

Description

Technical Field

[0001] The present invention relates to the technical field of wire harness sealing, and in particular to a sealed insulating structure for connecting a flat flexible wire harness and a round cable in the automotive field. Background Art

[0002] With the increasing size and integration of automotive sunroofs, and the demand for increased privacy, the demand for dimmable sunroofs is increasing. These sunroofs require adjustable light transmittance. Low light transmittance is required to protect against solar radiation and maintain privacy, while high light transmittance is required to enhance the view. This adjustment requires a dimming system, where the system voltage is externally adjusted to control the light transmittance.

[0003] The dimming system is located in the middle of the glass and requires a flat line to connect and lead out from the glass. Since round power supply cables are more economical and can be longer, the flat line leading out of the glass needs to be connected to the round cable.

[0004] The existing solution for connecting flat circuits and round cables is to weld the flat circuits to the board-end connector, then injection-mold the connection, and connect them by plugging in the wiring harness connector. This solution requires a pair of connectors, one end of which is embedded in the injection molding and the other end is connected to the round cable. The structure is complex and the cost is high. Summary of the Invention

[0005] Based on this, it is necessary to provide a sealing and insulating optimized structure for the connection between a flat flexible wiring harness and a round cable to address the problems of high manufacturing cost and complex structure at the connection between the existing flat circuit and the round cable.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a sealed insulation structure for connecting a flat flexible wiring harness and a round cable, comprising:

[0007] A connector is used to connect the dimming component to the power supply.

[0008] A wiring harness is electrically connected to the connector.

[0009] The FPC circuit is a conductive circuit led out from the inside of the glass. It is the circuit that connects the dimming film to the power supply. The FPC circuit is electrically connected to the wiring harness through FPC pad welding.

[0010] The injection molded block is used to seal, insulate and fix the dimming connector to the FPC line and the quick-plug wiring harness, protect the connection part, and is waterproof, wear-resistant, high-temperature resistant and vibration-resistant. The injection molded block is set at the FPC pad, and the injection molded block seals the FPC pad and covers at least a portion of the wiring harness and the FPC line. The injection molded block includes: a silicone sealing sheet, which is in sheet shape and covers the FPC pad and at least a portion of the wiring harness and the FPC line, and has waterproof and high-temperature resistant effects.

[0011] The inner card housing is arranged outside the silicone sealing sheet and fixes the silicone sealing sheet.

[0012] The outer injection-molded shell is fixed to the outer surface of the inner card shell by injection molding.

[0013] Among them, the end face of the inner card shell is provided with a positioning hole, and the inner cavity of the inner card shell is provided with a hollow cavity in the shape of a mesh hole. When the outer injection shell is injection molded, the injection material passes through the positioning hole and the hollow cavity to fill the inner cavity of the inner card shell.

[0014] Through injection molding, the interior of the inner card shell can also be filled with injection molding material to prevent the inner card shell from collapsing during injection molding, supplement the supporting strength of the inner card shell during injection molding, and also improve the internal waterproof strength, and cooperate with the silicone sealing sheet to achieve secondary waterproofing.

[0015] In one embodiment, a reinforcing sheet is fixed at the connection between the FPC circuit and the FPC pad to increase the strength of the injection-molded FPC circuit outlet and prevent tearing. The reinforcing sheet extends along the layout direction of the FPC circuit, and at least a portion is arranged outside the injection-molded block.

[0016] In one embodiment, the silicone sealing sheet is provided in two pieces, an upper piece and an lower piece, and a silicone sheet wire groove extending inward is provided on one side for sealing the connection between the wiring harness and the FPC pad. If the wire groove is not opened, a gap will appear when the wiring harness is extruded. A notch is made at the outlet of the wiring harness and the FPC line to allow the upper and lower silicone to fully bond with the wiring harness, thereby improving waterproofness and providing reliable strength and shock resistance.

[0017] In one embodiment, the inner card shell is detachable, and the port where the wiring harness enters is provided with an inner card wire groove adapted to the wiring harness, thereby improving the sealing performance.

[0018] In one embodiment, the inner card shell is provided in two layers, upper and lower, and is fixed by an inner card lock, so as to facilitate installation.

[0019] In one embodiment, a wire clip is fixedly provided in the middle of the wire harness for fixing the wire harness.

[0020] In one embodiment, a fixing buckle is fixed on the outside of the outer injection-molded shell for fixing the injection-molded block on a sheet metal part of a car.

[0021] Compared with the prior art, the sealed insulation structure for connecting a flat flexible wiring harness and a round cable of the present invention has the following advantages:

[0022] 1. Economical, by integrating the inner card shell and the outer injection molded shell into one piece, the cost of the connector is reduced and the cost is saved; it has good waterproofness, by setting the silicone sealing sheet and the injection molding structure, there are two waterproof structures, which have good waterproof performance.

[0023] 2. After the flat wire harness and the round cable are soldered, silicone is used for sealing and insulation. By setting an internal wire groove, the upper and lower silicone rubbers are fully bonded to the wire harness to improve waterproofness. The entire surface of silicone provides reliable strength and shock resistance to the flat cable inside the injection molding, and provides waterproof and temperature resistance, providing reliable protection for subsequent injection molding.

[0024] 3. The inner card shell relies on the hollow cavity, and the injection molding material flows into the mesh holes to increase the bonding force between the outer injection molding material and the inner card shell, while eliminating the gap between the inner card shell and the soft connection, preventing the outer shape from collapsing after cooling after injection molding. The outer shape injection molding provides secondary waterproof performance for the connection structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 It is a structural schematic diagram of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure inside the injection molding block of the present invention;

[0028] Figure 3 Schematic diagram of the structure of the silicone sealing sheet of the present invention;

[0029] Figure 4 It is a schematic structural diagram of the interior of the inner card housing of the present invention.

[0030] In the attached figure:

[0031] 1. Injection molding block; 11. Fixing buckle; 12. Outer injection molding shell; 13. Inner card shell; 131. Inner card lock buckle; 132. Positioning hole; 133. Inner card wire trough; 134. Hollow cavity; 14. Silicone sealing sheet; 141. Silicone sheet wire trough; 2. Connector; 3. Wire card; 4. Wiring harness; 5. FPC circuit; 45. FPC pad; 51. Reinforcement sheet. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] exist Figure 1-4 In the embodiment shown, the present invention provides a technical solution: a sealed insulation structure for connecting a flat flexible wiring harness and a round cable, comprising:

[0034] A set of connectors 2, connectors 2 are used to connect the dimming component to the power supply.

[0035] A set of wire harnesses 4 is electrically connected to the connector 2 , and a wire card 3 is fixedly provided in the middle of the wire harness 4 .

[0036] The FPC circuit 5 is electrically connected to the wiring harness 4 by welding the FPC pad 45 , and the FPC circuit 5 and the wiring harness 4 are distributed at right angles.

[0037] The injection molded block 1 is arranged at the FPC pad 45, and the injection molded block 1 seals the FPC pad 45 and covers at least a portion of the wiring harness 4 and the FPC circuit 5. A reinforcing sheet 51 is fixedly provided at the connection between the FPC circuit 5 and the FPC pad 45. The reinforcing sheet 51 extends along the layout direction of the FPC circuit 5, and at least a portion is arranged outside the injection molded block 1.

[0038] The injection molding block 1 includes: a silicone sealing sheet 14, which is in sheet form and is arranged in two pieces, one upper and one lower piece, and a silicone sheet wire groove 141 extending inward is provided on one side, which is used to seal the connection between the wiring harness 4 and the FPC pad 45, and to cover at least a portion of the FPC pad 45, the wiring harness 4, and the FPC line 5.

[0039] Internal card housing 13 is located outside of and secures silicone seal 14. The upper and lower layers of internal card housing 13 are detachable and secured by internal card locks 131. The port where the wiring harness 4 enters is equipped with an internal card slot 133 that is compatible with the wiring harness 4.

[0040] The outer injection-molded shell 12 is fixed to the outer surface of the inner card shell 13 by injection molding, and a fixing buckle 11 is fixedly installed on the outside of the outer injection-molded shell 12.

[0041] Among them, two positioning holes 132 are provided on the front and back end faces of the inner card shell 13, which are connected to the interior of the inner card shell 13. The inner cavity of the inner card shell 13 is provided with a hollow cavity 134, which is mesh-shaped. When the outer injection-molded shell 12 is injected, the injection material passes through the positioning holes 132 and the hollow cavity 134 to fill the inner cavity of the inner card shell 13. After molding, the inner card shell 13 will not collapse.

[0042] The production process of the present invention will be described below, comprising the following steps:

[0043] Solder the wiring harness 4 and the FPC circuit 5 to secure them at the FPC pad 45. Attach the reinforcing sheet 51 to the front and back of the FPC circuit 5 at the connection between the FPC pad 45 and the FPC circuit 5.

[0044] Attach the silicone sealing sheet 14 to the FPC pad 45, and snap-fit ​​each wire of the wire harness 4 to the silicone sheet wire groove 141;

[0045] The upper and lower covers of the inner card housing 13 are fixed together by the inner card lock 131, the silicone sealing sheet 14 is limited, and the inner card wire groove 133 is clamped and fitted with each wire harness 4;

[0046] Use the injection mold for producing the injection block 1, place the installed inner card shell 13 in the mold cavity, during injection molding, the material enters the inner cavity of the inner card shell 13 through the positioning hole 132, is evenly filled through the hollow cavity 134, and fits tightly with the soft silicone sealing sheet 14. After cooling, the outer injection molded shell 12 is formed to support the inside of the inner card shell 13 to prevent the inner card shell 13 from collapsing, and the production is completed. Fix the fixing buckle 11 on the outer injection molded shell 12

[0047] During installation, the injection molded block 1 is mounted on the automobile sheet metal part through the fixing buckle 11, the wire clip 3 fixes the wire harness 4, and the connector 2 is connected to the power supply.

[0048] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A sealed insulation structure for connecting a flat flexible wiring harness to a round cable, comprising: A connector (2), the connector (2) being used for connecting the dimming component to a power source; A wiring harness (4), wherein the wiring harness (4) is electrically connected to the connector (2); An FPC circuit (5) is electrically connected to the wiring harness (4) by welding an FPC soldering pad (45), and is characterized in that: An injection molding block (1) is provided at an FPC pad (45), and the injection molding block (1) seals the FPC pad (45) and covers at least a portion of the wiring harness (4) and the FPC circuit (5), and the injection molding block (1) comprises: A silicone sealing sheet (14), the silicone sealing sheet (14) being in sheet form and covering at least a portion of the FPC pad (45) and the wiring harness (4) and the FPC circuit (5); An inner card housing (13), wherein the inner card housing (13) is arranged outside the silicone sealing sheet (14) and fixes the silicone sealing sheet (14); An outer injection-molded shell (12), the outer injection-molded shell (12) being fixed to the outer surface of the inner card shell (13) by injection molding; The end face of the inner card shell (13) is provided with a positioning hole (132), and the inner cavity of the inner card shell (13) is provided with a hollow cavity (134). When the outer injection-molded shell (12) is injection-molded, the injection material passes through the positioning hole (132) and the hollow cavity (134) and fills the inner cavity of the inner card shell (13).

2. A sealed insulation structure for connecting a flat flexible wiring harness and a round cable according to claim 1, characterized in that: A reinforcing sheet (51) is fixedly provided at the connection between the FPC circuit (5) and the FPC pad (45); the reinforcing sheet (51) extends along the layout direction of the FPC circuit (5), and at least a portion of the reinforcing sheet (51) is arranged outside the injection molding block (1).

3. The sealed insulation structure for connecting a flat flexible wiring harness and a round cable according to claim 1, characterized in that: The silicone sealing sheet (14) is provided in two pieces, one upper piece and the other lower piece, and a silicone sheet wire groove (141) extending inward is provided on one side for sealing the connection between the wiring harness (4) and the FPC pad (45).

4. The sealed insulation structure for connecting a flat flexible wire harness and a round cable according to claim 1, characterized in that: The inner card housing (13) is detachably arranged, and the port through which the wire harness (4) enters is provided with an inner card wire groove (133) adapted to the wire harness (4).

5. A sealed insulation structure for connecting a flat flexible wire harness and a round cable according to claim 4, characterized in that: The inner card housing (13) is provided in two layers, upper and lower, and is fixed by means of an inner card lock (131).

6. The sealed insulation structure for connecting a flat flexible wire harness and a round cable according to claim 1, characterized in that: A wire clip (3) is fixedly provided in the middle of the wire harness (4).

7. The sealed insulation structure for connecting a flat flexible wire harness and a round cable according to claim 1, characterized in that: The outer injection-molded shell (12) is fixedly provided with a fixing buckle (11) on the outside.

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