Vehicle gauge secondary lock connector applied to single-sided substrate

Abstract

The invention discloses a vehicle gauge secondary lock connector applied to a single-sided substrate, which comprises a shell, a terminal and a positioning auxiliary piece, and is characterized in that the front end of an insertion part of the terminal is provided with a bending part; the shell is provided with a jack matched with the positioning auxiliary part, and the positioning auxiliary part is inserted into the shell from the jack and extends into the terminal hole to abut against the terminal so as to pre-tighten the terminal; a buckling pin and a clamping pin are arranged on the inserting part, an abutting part is arranged at the position, corresponding to the terminal, in the terminal hole, the abutting part abuts against the buckling pin and presses the terminal, and the positioning auxiliary part clamps the clamping pin and abuts against the terminal after being inserted into the shell. Therefore, the plate thickness tolerance compensation is realized through the self-adaptive deformation characteristic of the bent terminal, the fitting degree with a circuit board can be effectively improved, and the stability of electrical connection can be ensured; at least two electric brush parts are formed on the bent part, so that the damage of a vibration environment to the terminal can be reduced; and meanwhile, the terminal is limited and tightened by matching the positioning auxiliary piece with the abutting part and the tightening groove of the shell, so that the terminal can reach an extremely stable state.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical connection devices, and in particular to an automotive-grade secondary lock connector applied to a single-sided aluminum substrate. Background Art

[0002] The connector is an important device for achieving electrical connection, and its main function is to transmit power or electrical signals. When the connector is connected to the PCB board, a clamp-type terminal connector is generally used. In order to adapt to the connection with PCB boards of different thicknesses, the terminal is generally changed to a curved terminal to electrically connect with the PCB board (this is the description in the briefing materials, and the curved terminal is the basis. If it is not a curved terminal, there is no need to increase the housing space). However, when the terminal is changed to a curved structure, the housing space of the housing must be correspondingly enlarged to accommodate the terminal, and the increase in the housing space will inevitably lead to the problem of insufficient pre-tightening of the housing to the terminal. Especially when such terminals are used in cars, due to the large bumps and vibrations, it is easy to cause the terminal to loosen and the connector to loosen, resulting in poor contact and affecting normal use. Although there is also a method of using auxiliary positioning parts for positioning, it is still difficult to maintain the absolute stability of the terminal in the current auxiliary positioning part scheme when the housing space becomes larger, and the positioning effect is not good enough. Summary of the invention

[0003] In view of the defects in the prior art that the bent terminals are easily affected by the increase in the accommodation space and the like, the present invention provides an automotive-grade secondary lock connector for single-sided substrates with a simple structure, more reasonable design, better pre-tightening and higher stability.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: a secondary lock connector for automotive use applied to a single-sided substrate, comprising a shell and a terminal, the shell having a terminal hole for installing the terminal, and the front end of the shell having a board slot for assembling the circuit board; the front end of the plug-in portion of the terminal has a bent portion, and after the circuit board is inserted into the board slot, the terminal contacts the circuit board through its bent portion to achieve electrical connection; it also includes a positioning auxiliary part, the shell is provided with a plug-in hole matching the positioning auxiliary part, the positioning auxiliary part is inserted into the shell from the plug-in hole and extends into the terminal hole to press against the terminal to achieve pre-tightening of the terminal; buckle feet and clamping feet are respectively provided on the plug-in portion of the terminal, and an abutment portion is provided at the position corresponding to the terminal in the terminal hole of the shell, the abutment portion abuts the buckle foot and presses the terminal, and the positioning auxiliary part clamps the clamping foot and supports the terminal after being inserted into the shell. The two sides of the plug-in part protrude outward, and a tightening groove is provided on the hole wall of the terminal hole at a position opposite to the plug-in part. After the terminal is inserted into the terminal hole, the two sides of the plug-in part are inserted into the tightening groove, so that the terminal as a whole is tightened in the shell to ensure left and right lateral stability.

[0005] The buckling leg protrudes towards the top surface on the insertion part of the terminal to form an elastic structure. The abutting part protrudes into the terminal hole. After the terminal is inserted into the terminal hole, the tail end of the buckling leg is abutted by the abutting part and the top surface of the insertion part is abutted; the clamping leg protrudes towards the bottom surface on the insertion part of the terminal. The jack for inserting the positioning auxiliary is arranged at the bottom of the housing. After the positioning auxiliary is inserted into the housing from the bottom surface, it is stuck behind the clamping leg and abuts against the bottom surface of the insertion part.

[0006] Further, a notch is provided in the bending part at the front end of the terminal. The bending part is separated into at least two bent brush parts through the notch, and the end of the brush part is bent to the bottom surface of the insertion part.

[0007] Further, the brush part is bent into a loop structure. The end of the brush part is bent to abut against the bottom surface of the insertion part. The position where the bottom surface of the brush part is docked with the circuit board is set as a planar structure, and the circuit board abuts against the planar structure of the brush part.

[0008] Further, the surface of the abutting part facing the insertion of the terminal is set as an inclined surface. When the terminal is inserted into the terminal hole, the buckling leg passes over the abutting part through the inclined surface and is then abutted by the abutting part.

[0009] Further, a protruding positioning part is provided at the top of the positioning auxiliary. Each terminal corresponds to a positioning part. The top end of the positioning part abuts against the insertion part of the terminal to ensure the vertical stability of the terminal; the top end of the main body part of the positioning auxiliary is lower than the positioning part to form an avoidance structure for the wiring part at the rear section of the terminal, which is used to avoid interference with the wiring part of the terminal.

[0010] A plurality of buckles are provided on the side wall of the main body part of the positioning auxiliary. Buckle grooves matching the buckles are provided in the housing. After the positioning auxiliary is inserted into the housing, it is fixed by buckling the buckles with the buckle grooves.

[0011] Preferably, each terminal includes 2-4 brush parts, and each brush part is separated into a structure that is flush and parallel to each other through the notch in the middle.

[0012] Preferably, the buckling leg is an inclined elastic arm structure formed by stamping on the insertion part of the terminal. The buckling leg, the insertion part and the brush part are of an integral structure.

[0013] Wherein, the clamping leg is formed by stamping on the insertion part of the terminal. The buckling leg is perpendicular to the insertion part and is of an integral structure.

[0014] One aspect of the present invention is to adopt a bent terminal, and its self-adaptive deformation characteristics are used to achieve board thickness tolerance compensation, which can effectively improve the fitting degree with the circuit board and ensure the stability of electrical connection. Second, at least two brush parts are formed on the bent part of the terminal. On the one hand, it can reduce the damage to the terminal in a vibrating environment. On the other hand, it can prevent the terminal from being damaged and broken, which may instantaneously affect the electrical connection with the circuit board, giving users more time to react. Third, the position of the terminal is positioned and tightened by a positioning auxiliary part, and then the terminal is restricted and tightened in cooperation with the abutting part and the tightening groove of the housing, so that the terminal can reach an extremely stable state even in the large space of the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional structure diagram of the present invention;

[0016] Figure 2 is a longitudinal sectional structure diagram of the present invention;

[0017] Figure 3 is an exploded structure diagram of the present invention;

[0018] Figure 4 is a structure diagram of the present invention after removing the circuit board;

[0019] Figure 5 is a structure diagram of the present invention from another angle after removing the circuit board;

[0020] Figure 6 is a sectional structure diagram of the assembly state of the housing and the positioning auxiliary part;

[0021] Figure 7 is a structure diagram of the terminal;

[0022] Figure 8 is a structure diagram of the positioning auxiliary part.

[0023] In the figure, 1 is the housing, 11 is the terminal hole, 12 is the plug-in board slot, 13 is the abutting part, 14 is the inclined surface, 15 is the tightening groove, 2 is the terminal, 21 is the plugging part, 22 is the wiring part, 23 is the brush part, 24 is the buckle foot, 25 is the clamping foot, 3 is the positioning auxiliary part, 31 is the positioning part, 32 is the buckle, and 4 is the circuit board. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In this embodiment, with reference to Figures 1-8, a secondary lock connector for automotive use applied to a single-sided substrate, comprising a shell 1, a terminal 2 and a positioning auxiliary part 3, the terminal 2 comprising a plug-in portion 21 and a wiring portion 22, the shell 1 having a terminal hole 11 for mounting the terminal 2, and the front end of the shell 1 having a plug-in slot 12 for assembling a circuit board 4; the front end of the plug-in portion 21 of the terminal 2 has a bent portion, and after the circuit board 4 is inserted into the plug-in slot 12, the terminal 2 contacts the circuit board 4 through its bent portion to achieve electrical connection; a plug-in hole matching the positioning auxiliary part 3 is provided on the shell 1, the positioning auxiliary part 3 is inserted into the shell 1 from the plug-in hole and extends into the terminal hole 11 to press against the terminal 2 to achieve pre-tightening of the terminal 2; a notch is provided in the bent portion at the front end of the terminal 2, and the bent portion is divided into two bent brush portions 23 by the notch (there may also be multiple, such as 3, 4 or more, depending on actual needs), and the end of the brush portion 23 is bent to the bottom surface of the plug-in portion 21.

[0025] A buckle foot 24 protruding toward the top surface and having elasticity is provided on the plug-in portion 21 of the terminal 2, and a contact portion 13 is provided on the top of the terminal hole 11, and the contact portion 13 protrudes toward the inside of the terminal hole 11. After the terminal 2 is inserted into the terminal hole 11, the contact portion 13 abuts against the tail end of the buckle foot 24 and the top surface of the plug-in portion 21. In this way, the upper part of the terminal 2 can be pre-tightened, and a first-level anti-retraction structure is formed.

[0026] A foot 25 protruding toward the bottom is provided on the plug-in portion 21 of the terminal 2, and a plug hole for inserting the positioning auxiliary member 3 is provided at the bottom of the housing 1. After the positioning auxiliary member 3 is inserted into the housing 1 from the bottom, it is clamped behind the foot 25 and presses against the bottom of the plug-in portion 21. In this way, the lower part of the terminal 2 can be pre-tightened and a second anti-retraction structure can be formed.

[0027] The brush part 23 is bent into a ring structure, similar to an O shape, and the end of the brush part 23 is bent to abut against the bottom surface of the plug part 21. After the circuit board 4 is inserted, it will produce an extrusion force on the brush part 23, and this extrusion force will cause the plug part 21 to produce a reverse thrust on the brush part 23, so that the brush part 23 and the circuit board 4 are more tightly combined; the position where the bottom surface of the brush part 23 and the circuit board 4 are connected is set to a flat structure, and the circuit board 4 is inserted and abutted against the flat structure of the brush part 23. In this way, the contact area can be increased, and the reliability of the electrical connection can be further improved.

[0028] The side of the abutment portion 13 facing the insertion of the terminal 2 is set as an inclined surface 14. When the terminal 2 is inserted into the terminal hole 11, the buckle foot 24 passes over the abutment portion 13 via the inclined surface 14 and is then abutted by the abutment portion 13, which can reduce resistance and facilitate the insertion of the buckle foot 24.

[0029] Both sides of the insertion part 21 protrude towards both sides relative to the brush part 23. A tightening groove 15 is provided on the hole wall of the terminal hole 11 at a position opposite to the insertion part 21. After the terminal 2 is inserted into the terminal hole 11, both sides of the insertion part 21 are inserted into the tightening groove 15, so that the terminal 2 is integrally tightened in the housing 1 to ensure the stability in the left - right horizontal direction.

[0030] A protruding positioning part 31 is provided at the top of the positioning auxiliary part 3. Each terminal 2 corresponds to a positioning part 31. By the top end of the positioning part 31 abutting against the insertion part 21 of the corresponding terminal 2, the stability of the terminal 2 in the vertical direction is ensured; the top end of the main body part of the positioning auxiliary part 3 is lower than the positioning part 31 to form an avoidance structure for the wiring part 22 of the terminal 2, which is used to avoid interference with the wiring part 22 of the terminal 2; a plurality of buckles 32 are provided on the side wall of the main body part of the positioning auxiliary part 3, and a buckle groove matching with the buckle 32 is provided in the housing 1. After the positioning auxiliary part 3 is inserted into the housing 1, the positioning auxiliary part 3 is fixed by the buckling of the buckle 32 and the buckle groove.

[0031] Each brush part 23 is separated into a structure that is flush and parallel to each other by a notch in the middle.

[0032] The buckle leg 24 is an inclined spring arm structure formed by upward stamping from the insertion part 21 of the terminal 2. The buckle leg 24, the insertion part 21 and the brush part 23 are of an integral structure.

[0033] The clamping leg 25 is formed by downward stamping from the insertion part 21 of the terminal 2. The clamping leg 25 is perpendicular to the insertion part 21 and is of an integral structure.

[0034] It should be noted that in the present invention, terms regarding directions or positions such as front, back, left, right, top, bottom, etc. are based on Figures 1-3 the perspective. The left side is the front, the right side is the back, the upper side is the top, and the lower side is the bottom. When the viewing angle changes, the corresponding directions and positions may also change accordingly.

[0035] The present invention has been described in detail above. The above description is only the preferred embodiment of the present invention, and it cannot limit the scope of the implementation of the present invention. That is, all equivalent changes and modifications made according to the scope of this application should still fall within the scope covered by the present invention.

Claims

1. A secondary lock connector for a single-sided substrate, comprising a housing and a terminal, wherein the housing has a terminal hole for installing the terminal, and the front end of the housing has a plug-in slot for assembling a circuit board; the front end of the plug-in portion of the terminal has a bent portion, and after the circuit board is inserted into the plug-in slot, the terminal contacts the circuit board through the bent portion to achieve electrical connection, characterized in that: It also includes a positioning auxiliary part, and a socket matching the positioning auxiliary part is provided on the shell. The positioning auxiliary part is inserted into the shell through the socket and extends into the terminal hole to press the terminal to realize pre-tightening of the terminal; buckle feet and clamping feet are respectively provided on the plug-in part of the terminal, and abutment parts are provided at the position corresponding to the terminal in the terminal hole of the shell, and the buckle feet are pressed by the abutment parts, and the positioning auxiliary part clamps the clamping feet and supports the terminal after being inserted into the shell; both sides of the plug-in part protrude outward, and a tightening groove is provided on the hole wall of the terminal hole at a position opposite to the plug-in part. After the terminal is inserted into the terminal hole, both sides of the plug-in part are inserted into the tightening groove.

2. The automotive grade secondary lock connector for single-sided substrate according to claim 1, characterized in that: The buckle foot protrudes toward the top surface on the plug-in part of the terminal to form an elastic structure, and the abutting part protrudes toward the terminal hole. After the terminal is inserted into the terminal hole, the abutting part abuts against the tail end of the buckle foot and the top surface of the plug-in part; the clamping foot protrudes toward the bottom surface on the plug-in part of the terminal, and the insertion hole for inserting the positioning auxiliary part is set at the bottom of the shell. After the positioning auxiliary part is inserted into the shell from the bottom surface, it is clamped behind the clamping foot and abuts against the bottom surface of the plug-in part.

3. The automotive grade secondary lock connector applied to a single-sided substrate according to claim 1, characterized in that: A notch is arranged in the bent portion at the front end of the terminal, and the bent portion is divided into at least two bent brush portions by the notch, and the ends of the brush portions are bent to the bottom surface of the plug-in portion.

4. The automotive grade secondary lock connector applied to a single-sided substrate according to claim 3 is characterized in that: The brush part is bent into a ring structure, and the end of the brush part is bent to abut against the bottom surface of the plug-in part. The position where the bottom surface of the brush part and the circuit board are connected is set to a plane structure, and the circuit board and the plane structure of the brush part abut against each other.

5. The automotive grade secondary lock connector applied to a single-sided substrate according to claim 2, characterized in that: The side of the abutment part facing the terminal insertion is set as an inclined surface. When the terminal is inserted into the terminal hole, the buckle foot passes over the abutment part via the inclined surface and is abutted by the abutment part.

6. The automotive grade secondary lock connector applied to a single-sided substrate according to claim 2, characterized in that: A raised positioning portion is provided on the top of the positioning auxiliary component, each terminal corresponds to a positioning portion, and the top of the positioning portion is pressed against the plug-in portion of the terminal; the top of the main body of the positioning auxiliary component is lower than the positioning portion to form a avoidance structure for the rear wiring portion of the terminal.

7. The automotive grade secondary lock connector applied to a single-sided substrate according to claim 2, characterized in that: A plurality of buckles are arranged on the side wall of the main body of the positioning auxiliary component, and buckle grooves matching the buckles are arranged in the shell. After the positioning auxiliary component is inserted into the shell, the buckles are fastened with the buckle grooves to fix the positioning auxiliary component.

8. The automotive grade secondary lock connector applied to a single-sided substrate according to claim 3, characterized in that: Each terminal includes 2-4 brush parts, and each brush part is separated into mutually flush and parallel structures by a gap in the middle.

9. The automotive grade secondary lock connector applied to a single-sided substrate according to claim 2, characterized in that: The buckle foot is an inclined elastic arm structure formed by stamping from the plug-in part of the terminal, and the buckle foot, the plug-in part and the brush part are an integrated structure.

10. The automotive grade secondary lock connector applied to a single-sided substrate according to claim 2, characterized in that: The clamping foot is formed from the plug-in portion of the terminal by stamping, and the clamping foot and the plug-in portion are perpendicular to each other and form an integral structure.

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