A connector with a plastic housing and an embedded metal fixing fastener

Abstract

The present invention discloses a connector having a plastic shell with an embedded metal fixing fastener, comprising a plastic shell with a hollow cavity formed by a front-to-back through-hole, a metal fixing fastener embedded in the plastic shell, and a plastic terminal assembly located in the hollow cavity and assembled with the metal fixing fastener. The metal fixing fastener includes a first blocking piece located in the hollow cavity and having an opening on its surface. The front portion of the plastic terminal assembly passes through the opening and abuts against the first blocking piece via a stepped surface to achieve position limiting. The metal fixing fastener also includes a plurality of pairs of pressing pieces that abut against the back of the plastic terminal assembly to press it and fasten it together with the first blocking piece. The present invention has good integrity and high structural strength. By using a plastic shell with an embedded metal fixing fastener, the manufacturing cost is reduced while ensuring the structural strength of the product.

Description

Technical field

[0001] The present invention belongs to the technical field of electrical connectors, and in particular relates to a connector with a plastic housing having embedded metal fixing fasteners. [Background Technology]

[0002] Electrical connectors are widely used in electronic devices and are as important to electronic devices as blood vessels are to humans. This is especially true for electrical connectors used to transmit power signals, as their performance directly affects the normal operation of the entire electronic device. In the prior art, CN201621243315.X discloses a connector that prevents a terminal from short-circuiting with a metal housing. The connector comprises a metal housing and an elastic arm terminal disposed within the metal housing, as well as a plastic partition wall disposed between the elastic arm terminal and the metal housing. By providing a partition wall on the plastic body between the elastic arm terminal and the metal housing, the elastic arm terminal is prevented from contacting the metal housing, thereby preventing a short circuit. Furthermore, the connector has a simple production process, requiring direct injection molding, which reduces production costs. However, this connector structure utilizes a metal housing, resulting in relatively high production costs. Furthermore, the plastic body and the terminal fixing body are assembled together using an assembly method, significantly reducing the overall structural strength of the connector. Furthermore, assembly errors can occur during the assembly process, which can also affect the overall structural performance of the connector.

[0003] Therefore, it is necessary to provide a new connector with a plastic housing having a built-in metal fixing fastener to solve the above problems. [Summary of the invention]

[0004] The main purpose of the present invention is to provide a connector with a plastic shell embedded with a metal fixing fastener, which has good integrity and high structural strength. The use of a plastic shell with an embedded metal fixing fastener reduces the production cost while ensuring the structural strength of the product.

[0005] The present invention achieves the above-mentioned purpose through the following technical solution: a connector with a plastic shell with an embedded metal fixing fastener, which includes a plastic shell with a hollow cavity formed by a front-to-back penetration inside, a metal fixing fastener embedded in the plastic shell, and a plastic terminal assembly located in the hollow cavity and assembled with the metal fixing fastener, the metal fixing fastener includes a first blocking piece located in the hollow cavity and having an opening on the surface, the front of the plastic terminal assembly passes through the opening and is limited by abutting against the first blocking piece through a step surface; the metal fixing fastener also includes several pairs of clamping pieces that press the back of the plastic terminal assembly to press it together with the first blocking piece.

[0006] Furthermore, a sealing ring receiving groove is provided on the front end surface of the plastic shell and surrounds the periphery of the opening of the hollow cavity, and a waterproof ring is provided in the sealing ring receiving groove.

[0007] Furthermore, the waterproof ring is a straight-insert waterproof ring, and includes a straight-insert portion inserted into the sealing ring receiving groove, and a large-head sealing portion located at the front end of the straight-insert portion and sealing the sealing ring receiving groove.

[0008] Furthermore, the metal fixing fastener also includes vertical connecting pieces located on the left and right sides of the first blocking piece and extending along the plug-in direction, and a snap-fit structure piece folded 180° outward from the top of the vertical connecting piece; the left and right ends of the first blocking piece extend to the left and right inner wall surfaces of the hollow cavity; the vertical connecting piece is embedded in the plastic shell, and the two snap-fit structure pieces are exposed on the left and right sides of the plastic shell.

[0009] Furthermore, the plastic terminal assembly includes a first insulating body, an upper row of terminals and a lower row of terminals embedded in the first insulating body, a middle steel sheet, and a second insulating body overmolded on the outer periphery of the front section of the first insulating body; the middle steel sheet is located between the upper row of terminals and the lower row of terminals.

[0010] Furthermore, the tails of the upper row of terminals, the lower row of terminals and the middle steel sheet extend out of the back of the first insulating body to form a connecting pin structure; the front ends of the upper row of terminals, the lower row of terminals and the middle steel sheet are embedded in the second insulating body, and the surfaces of the upper row of terminals and the lower row of terminals for contacting the plug-in are respectively exposed on the upper surface and lower surface of the second insulating body, and the middle steel sheet is respectively exposed on the left and right side surfaces of the second insulating body.

[0011] Furthermore, the outer surface of the middle steel sheet has a convex structure with a variable size in the plugging direction.

[0012] Furthermore, the middle steel sheet is fitted with the two outermost terminals of the upper row of terminals, and the middle steel sheet is spaced at least 0.1 mm from the lower row of terminals.

[0013] Furthermore, an air-avoiding opening is provided at the head of the middle steel sheet corresponding to the head position of the lower row of terminals.

[0014] Furthermore, the tail of the plastic shell is filled with waterproof glue to seal the open space at the tail of the hollow cavity.

[0015] Compared with the prior art, the beneficial effects of the connector with a plastic shell with an embedded metal fixing fastener of the present invention are: the metal fixing fastener and plastic form a metal sheet embedded plastic shell. Compared with the traditional metal shell, the use of a plastic shell can greatly reduce the impact on the antenna signal and is more suitable for 5G signal transmission; the embedded metal sheet plastic shell structure greatly improves the strength of the plastic shell; the blocking piece in front of the metal fixing fastener fixes the main body of the plastic terminal assembly, and after the plastic terminal assembly is inserted, the four riveting pieces at the tail are riveted and fastened to the back of the plastic terminal assembly, thereby improving the snapping force between the plastic shell and the plastic terminal assembly and improving the assembly accuracy of the plastic main body; the insert plastic shell has a lower production cost than the traditional structure, and the process is more stable and reliable. The plastic terminal assembly is obtained by two Insert Molding processes, which improves the position stability of the terminal in the insulator and improves product quality.

Brief Description of the Drawings

[0016] Figure 1 Schematic diagram of the structure of an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the explosion structure of an embodiment of the present invention;

[0018] Figure 3 A schematic side view of the internal structure of an embodiment of the present invention;

[0019] Figure 4 This is a schematic structural diagram of a plastic housing and a metal fixing fastener in an embodiment of the present invention;

[0020] Figure 5 This is a schematic structural diagram of a waterproof ring in an embodiment of the present invention;

[0021] Figure 6 Schematic diagram of the structure of a metal fixing fastener in an embodiment of the present invention;

[0022] Figure 7 Schematic diagram of the front structure of the metal fixing fastener in an embodiment of the present invention;

[0023] Figure 8 This is a structural diagram of a plastic terminal assembly in an embodiment of the present invention;

[0024] Figure 9 This is a structural diagram of the double-layer terminal and the middle steel sheet in the assembled state according to an embodiment of the present invention;

[0025] The numbers in the figure represent:

[0026] 100, 200 are connectors with plastic housings with built-in metal fasteners;

[0027] 1 plastic shell, 11 hollow cavity, 12 sealing ring storage groove;

[0028] 2 metal fixing fastener, 21 opening, 22 first blocking piece, 23 upper pressing piece, 24 lower pressing piece, 25 horizontal protection piece, 26 vertical connecting piece, 27 snap-fit structure piece;

[0029] 3 plastic terminal assembly, 31 step surface, 32 first insulating body, 321 flat plate portion, 322 raised ring head, 3221 first supporting protrusion, 33 upper row terminal, 34 lower row terminal, 35 middle steel sheet, 351 convex structure, 352 airtight opening, 36 second insulating body;

[0030] 4 waterproof ring, 41 straight plug part, 42 big head sealing part; 5 waterproof glue. [Specific implementation method]

[0031] Example 1:

[0032] Please refer to Figures 1-9 The present embodiment is a connector 100 with a plastic shell having an embedded metal fixing fastener, which includes a plastic shell 1 with a hollow cavity 11 formed by a front-to-back through-hole, a metal fixing fastener 2 embedded in the plastic shell 1, and a plastic terminal assembly 3 located in the hollow cavity 11 and assembled with the metal fixing fastener 2. The metal fixing fastener 2 includes a first blocking piece 22 located in the hollow cavity 11 and having an opening 21 on the surface. The front of the plastic terminal assembly 3 passes through the opening 21 and is limited by abutting against the first blocking piece 22 through a step surface 31. The upper edge of the first blocking piece 22 is provided with a pair of upper clamping pieces 23 bent backward and downward to tighten the back of the plastic terminal assembly 3, and the lower edge is provided with a pair of lower clamping pieces 24 bent backward and upward to tighten the back of the plastic terminal assembly 3.

[0033] The metal fixing fastener 2 is integrally formed with the plastic housing 1 by injection molding. The front face of the plastic housing 1 is provided with a sealing ring receiving groove 12 surrounding the opening of the hollow cavity 11. A waterproof ring 4 is disposed within the sealing ring receiving groove 12. The waterproof ring 4 is a plug-in waterproof ring and includes a plug-in portion 41 that is inserted into the sealing ring receiving groove 12, and a large end sealing portion 42 located at the front end of the plug-in portion 41 and sealing the sealing ring receiving groove 12. This embodiment utilizes a plug-in waterproof ring 4, which simplifies the manufacturing process compared to the traditional sleeve-type process. Furthermore, the waterproof ring 4 is less prone to twisting, and the elasticity requirement is lowered, thereby reducing the manufacturing process requirements and production costs.

[0034] The metal fastener 2 is a one-piece structure bent from steel, iron, or a metal alloy. It also includes a horizontal protective sheet 25 bent backward from the upper or lower edge of the first barrier sheet 22, vertical connecting sheets 26 extending along the insertion direction on either side of the first barrier sheet 22, and a snap-fit structure sheet 27 folded 180° outward from the top of the vertical connecting sheet 26. The two horizontal protective sheets 25 respectively cover portions of the upper and lower surfaces of the plastic terminal assembly 3, enhancing the wear resistance and structural strength of the plastic terminal assembly 3. The left and right ends of the first barrier sheet 22 extend to the left and right inner walls of the hollow cavity 11; the two horizontal protective sheets 25 adhere closely to the upper and lower inner walls of the hollow cavity 11; the vertical connecting sheet 26 is embedded within the plastic housing 1, and the two snap-fit structure sheets 27 are exposed on the left and right sides of the plastic housing 1. The vertical connecting sheets 26 are embedded within the plastic material of the plastic housing 1, enhancing the connection strength and structural stability of the metal fastener 2 to the plastic housing 1. The metal fastener 2 has snap-on structural pieces 27 exposed on the left and right sides of the plastic housing 1, which can be used to connect to other structural components. A pair of upper and lower pressing pieces 23 and 24 on the metal fastener 2 press the plastic terminal assembly 3 against the first blocking piece 22, thereby securing the metal fastener 2 and the plastic terminal assembly 3 together, making assembly convenient.

[0035] The plastic terminal assembly 3 includes a first insulating body 32, an upper row of terminals 33 and a lower row of terminals 34, which are injection-molded within the first insulating body 32, a middle steel sheet 35, and a second insulating body 36, which is overmolded around the front portion of the first insulating body 32. The middle steel sheet 35 is interposed between the upper and lower rows of terminals 33 and 34. Two middle steel sheets 35 are provided, one located between the two outermost layers of terminals.

[0036] The first insulating body 32 includes a flat plate portion 321 and a raised collar portion 322 at the rear of the flat plate portion 321. A stepped surface 31 is provided on the front end of the raised collar portion 322. The upper surface of the raised collar portion 322 is provided with a first support protrusion 3221 corresponding to the position of the upper clamping plate 23, and the lower surface is provided with a second support protrusion (not shown) corresponding to the position of the lower clamping plate 24. The first and second support protrusions 3221 and 3222 respectively abut the corresponding horizontal portions of the clamping plates, providing a bending point for riveting when the clamping plates are riveted from a horizontal position to a vertical position, thereby preventing the clamping plates from damaging the plastic terminal assembly 3 during riveting. The tail portions of the upper and lower terminals 33, 34, and the middle steel plate 35 extend from the back of the first insulating body 32 to form a connecting pin structure for connection to the circuit board. The front ends of the upper and lower terminals 33, 34, and the middle steel sheet 35 are embedded in the second insulating body 36. The surfaces of the upper and lower terminals 33, 34 that are intended to contact the mating plug are exposed on the upper and lower surfaces of the second insulating body 36, respectively. The middle steel sheet 35 is exposed on the left and right surfaces of the second insulating body 36, and the outer surface of the middle steel sheet 35 has a convex structure 351 with varying dimensions in the insertion direction. This helps to achieve a snap connection with the plastic terminal assembly 3 when the mating plug is inserted, improving the insertion and locking force. The protrusion of the middle steel sheet 35 from the side surface of the second insulating body 36 greatly improves the strength and side wear resistance of the plastic terminal assembly 3.

[0037] The middle steel sheet 35 is positioned in contact with the two outermost terminals of the upper row of terminals 33, effectively reducing resistance and maximizing current conduction. A spacing of at least 0.1 mm between the middle steel sheet 35 and the lower row of terminals 34 prevents them from overlapping with other terminals, achieving signal isolation and enhancing product functionality.

[0038] An air-avoiding opening 352 is provided at the head of the middle steel sheet 35 corresponding to the head of the lower row of terminals 33 to prevent short circuit.

[0039] In this embodiment, the tail of the plastic shell 1 is filled with waterproof glue 5 to seal the tail opening space of the hollow cavity 11, thereby achieving waterproof requirements.

[0040] In this embodiment, the assembly of the metal fixing fastener 2 and the plastic terminal assembly 3 is achieved by riveting and fastening two pairs of upper and lower clamping plates to the back of the plastic terminal assembly 3. In other embodiments, the assembly can also be achieved by riveting and fastening multiple pairs of clamping plates on the left and right sides.

[0041] During production, the upper row of terminals 33, the lower row of terminals 34 and the middle steel sheet 35 are first buried in the mold, and the first insulating body 32 is formed by the Insert Molding process to obtain the first component; then the first component is subjected to a secondary Insert Molding to form the second insulating body 36 to obtain the plastic terminal component 3; at the same time, the metal fixing fastener 2 is formed into a plastic shell 1 by the Insert Molding process to obtain the second component; finally, the first component is inserted into the second component. Specifically, the flat plate portion 321 in the first insulating body 32 is inserted from the tail of the hollow cavity 11 and passes through the opening 21. The step surface 31 supports the first blocking piece 22. The two upper clamping pieces 23 and the two lower clamping pieces 24 are riveted up and down to fix the plastic terminal component 3 between the first blocking piece 22 and the four clamping pieces. The four rivet points are fixed with uniform force, so that the assembly of the plastic terminal component 3 and the plastic shell 1 is more firm, and finally the connector described in this embodiment is obtained.

[0042] The present embodiment provides a connector 100 having a plastic shell with an embedded metal fixing fastener, in which the metal fixing fastener and plastic form a metal sheet embedded plastic shell. Compared with the traditional metal shell, the plastic shell can greatly reduce the impact on the antenna signal and is more suitable for 5G signal transmission; the embedded metal sheet plastic shell structure greatly improves the strength of the plastic shell; the blocking piece in front of the metal fixing fastener fixes the main body of the plastic terminal assembly, and after the plastic terminal assembly is inserted, the four riveting pieces at the tail are riveted and fastened to the back of the plastic terminal assembly, thereby improving the fastening force between the plastic shell and the plastic terminal assembly and improving the assembly accuracy of the plastic body; the insert plastic shell has a lower production cost than the traditional structure, and the process is more stable and reliable. The plastic terminal assembly is obtained by two Insert Molding processes, which improves the position stability of the terminal in the insulator and improves the product quality.

[0043] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all fall within the scope of protection of the present invention.

Claims

1. A connector having a plastic housing with an embedded metal fastener, characterized in that: It includes a plastic shell with a hollow cavity formed by the front and back penetration, a metal fixing fastener embedded in the plastic shell, and a plastic terminal assembly located in the hollow cavity and assembled with the metal fixing fastener; The metal fixing fastener includes a first blocking piece located in the hollow cavity and having an opening on its surface, vertical connecting pieces located on the left and right sides of the first blocking piece and extending along the plugging direction, and a buckle structure piece folded outward 180° from the top of the vertical connecting piece; The upper edge of the first blocking piece is provided with a pair of upper pressing pieces that are bent backward and downward to tighten the back of the plastic terminal assembly, and the lower edge is provided with a pair of lower pressing pieces that are bent backward and upward to tighten the back of the plastic terminal assembly; the left and right ends of the first blocking piece extend to the left and right inner wall surfaces of the hollow cavity; the vertical connecting piece is embedded in the plastic shell, and the two snap-fit structure pieces are exposed on the left and right sides of the plastic shell; The front portion of the plastic terminal assembly passes through the opening and is limited by abutting against the first blocking piece through a stepped surface. The plastic terminal assembly includes a first insulating body, an upper row of terminals and a lower row of terminals embedded in the first insulating body, and a middle steel sheet, and a second insulating body overmolded around the outer periphery of the front section of the first insulating body; the middle steel sheet is interposed between the upper row of terminals and the lower row of terminals; the first insulating body includes a flat plate portion and a raised ring head portion located at the rear of the flat plate portion, and the stepped surface is provided on the front end surface of the raised ring head portion. The manufacturing process of the connector includes: The upper row of terminals, the lower row of terminals and the middle steel sheet are buried in the mold, and the first insulating body is formed by the Insert Molding process to obtain the first component; the first component is subjected to a secondary Insert Molding process to form a second insulating body to obtain a plastic terminal assembly; at the same time, the metal fixing fastener is formed into a plastic shell by the Insert Molding process to obtain the second component; finally, the plastic terminal assembly is inserted into the second assembly: the flat plate part of the plastic terminal assembly is inserted from the tail of the hollow cavity and through the opening, the step surface supports the first blocking piece, the two upper clamping pieces and the two lower clamping pieces are riveted up and down, the plastic terminal assembly is fixed between the first blocking piece and the four clamping pieces, and the plastic terminal assembly and the plastic shell are assembled together to obtain a connector.

2. The connector having a plastic housing with an embedded metal fastener as claimed in claim 1, wherein: A sealing ring receiving groove is provided on the front end surface of the plastic shell and surrounds the periphery of the opening of the hollow cavity. A waterproof ring is provided in the sealing ring receiving groove.

3. The connector having a plastic housing with an embedded metal fastener as claimed in claim 2, wherein: The waterproof ring is a straight-insert waterproof ring and includes a straight-insert portion inserted into the sealing ring receiving groove and a large-head blocking portion located at the front end of the straight-insert portion and blocking the sealing ring receiving groove.

4. The connector having a plastic housing with an embedded metal fastener as claimed in claim 1, wherein: The tails of the upper row of terminals, the lower row of terminals, and the middle steel sheet extend out of the back of the first insulating body to form a connecting pin structure; the front ends of the upper row of terminals, the lower row of terminals, and the middle steel sheet are embedded in the second insulating body, and the surfaces of the upper row of terminals and the lower row of terminals for contacting the plug-in are respectively exposed on the upper surface and the lower surface of the second insulating body, and the middle steel sheet is respectively exposed on the left and right side surfaces of the second insulating body.

5. The connector having a plastic housing with a built-in metal fastener as claimed in claim 1, wherein: The outer surface of the middle steel sheet has a convex structure with a changing size in the plugging direction.

6. The connector having a plastic housing with a built-in metal fastener as claimed in claim 1, wherein: The middle steel sheet is fitted with the two outermost terminals of the upper row of terminals, and the middle steel sheet is spaced at least 0.1 mm from the lower row of terminals.

7. The connector having a plastic housing with a built-in metal fastener as claimed in claim 1, wherein: The head of the middle steel sheet is provided with an air-avoiding opening at a position corresponding to the head of the lower row of terminals.

8. The connector having a plastic housing with a built-in metal fastener as claimed in claim 1, wherein: The tail of the plastic shell is filled with waterproof glue to seal the open space at the tail of the hollow cavity.

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