CN216214567U - Electric connector with terminal position ensuring structure - Google Patents

Abstract

The utility model relates to an electric connector with terminal position assurance structure, including connector main part, terminal and secondary locking piece, be equipped with the terminal pothook in the terminal mounting hole of connector main part, the terminal passes through the hook portion joint of constant head tank with the terminal pothook, and the secondary locking piece is equipped with the locking piece that inserts behind one's back in order to support the terminal pothook in the terminal mounting hole when removing the locking position from the pre-installation position, and, the terminal pothook with the relative tip of locking piece still is equipped with the concave-convex structure that cooperatees in order can offset each other when the hook portion of terminal pothook fails to block into the constant head tank of terminal. When the terminal is implanted in the pseudo positioning, the terminal pushes the hook part of the terminal hook to enable the terminal hook to tilt backwards, the concave-convex structures arranged at the opposite ends of the terminal hook and the locking block can mutually abut to generate interference, and the secondary locking piece is prevented from entering a locking position, so that the pseudo positioning of the terminal is detected.

Description

Electric connector with terminal position ensuring structure

Technical Field

The present invention relates to an electrical connector, and more particularly, to an electrical connector having a terminal position assurance structure.

Background

An electrical connector is a combination of plug or receptacle terminals mounted in a connector body, which functions to conduct electricity or transmit signals through a wire connection. Retention of the terminals within the connector body is generally ensured by the terminals and the connector body by means of cooperating catch structures. The TPA is a Terminal Position Assurance, and chinese means that a Terminal Position Assurance is a device that is provided in an electrical connector to secondarily protect and limit the Terminal, and is also called a secondary locking structure, which plays a role in locking the Terminal and enhancing the retention force of the Terminal in the connector body, and prevents the Terminal from coming off under the action of an external tensile force to cause a line power failure.

The terminal position ensuring structure mostly adopts a mode of acting on the back of the terminal clamping hook to prevent the hook part of the terminal clamping hook from being separated from the terminal positioning groove, and whether the terminal is implanted to be positioned normally is detected by interference generated when the head end surface of the terminal clamping hook contacts with the end surface of the secondary locking block. Fig. 1 and 2 show a terminal position assurance structure of a conventional electrical connector 10. As shown in fig. 1, when the terminal 12 is correctly inserted into the terminal mounting hole 14 of the connector body 11, the hook 151 of the terminal hook 15 is engaged with the positioning groove 121 of the terminal 12, and the locking block 131 of the secondary locking member 13 can smoothly move from the pre-installed position to the locked position, and the back of the inserted terminal hook 15 abuts against the terminal hook 15. However, as shown in fig. 2, when the terminal 12 is not correctly inserted into the terminal mounting hole 14 of the connector body 11, that is, the hook portion 151 of the terminal hook 15 is not locked into the positioning groove 121 of the terminal 12, at this time, the terminal 12 pushes the hook portion 151 of the terminal hook 15 to tilt the terminal hook 15 backward, the head end surface 152 of the terminal hook 15 is actually an inclined surface in an inclined state, and the head end surface cooperates with the end surface 1311 of the locking block 131 to guide the insertion of the secondary locking member 13, and the sidewall 141 of the terminal mounting hole 14 is thin and deformed by force, so that the locking block 131 can still be inserted behind the terminal hook 15 without interference, and the capability of the terminal position assurance structure to detect the terminal insertion pseudo-positioning is weakened.

SUMMERY OF THE UTILITY MODEL

The present application is directed to an electrical connector, which can enhance the terminal position assurance structure to detect the terminal implantation pseudomorphic positioning capability.

The technical scheme adopted by the application for solving the technical problem is as follows: the electric connector with the terminal position guaranteeing structure comprises a connector main body, a terminal and a secondary locking piece, wherein the connector main body is provided with a terminal mounting hole penetrating from a first end to a second end, a terminal clamping hook extending towards the second end is arranged in the terminal mounting hole, a positioning groove is formed in the terminal, the terminal is implanted into the terminal mounting hole from the first end to the second end of the connector main body and is clamped with the hook portion of the terminal clamping hook through the positioning groove, the secondary locking piece is installed into the connector main body from the second end to the first end of the connector main body and has a pre-installation position and a locking position relative to the connector main body, the secondary locking piece is provided with a locking block which is inserted into the back of the terminal clamping hook in the terminal mounting hole to abut against the terminal clamping hook when moving from the pre-installation position to the locking position, and the end portion of the terminal clamping hook facing the second end of the connector main body and the opposite end portion of the locking block facing the first end of the connector main body are further provided with the locking block Concave-convex structures are provided which are matched with each other so as to be mutually abutted when the hook part of the terminal hook is not clamped into the positioning groove of the terminal.

In an embodiment of the electrical connector having the terminal position assurance structure, the concave-convex structure includes a rib formed on an end surface of the terminal hook facing the second end of the connector body and a groove opened on an opposite end surface of the locking block for receiving the rib.

In an embodiment of the electrical connector with the terminal position assurance structure, the rib is disposed on a side of the end surface of the terminal hook away from the hook portion, and the groove is disposed on a side of the opposite end surface of the locking block close to the terminal hook.

In an embodiment of the electrical connector with the terminal position assurance structure, the concave-convex structure includes a rib formed on an end surface of the terminal hook facing the second end of the connector body and a bayonet formed on a side of the opposite end of the locking block close to the terminal hook for abutting against the rib.

The electric connector with the terminal position assurance structure has the following beneficial effects: according to the electric connector of this application embodiment sets up matched with concave-convex structure at the relative tip of terminal pothook and locking piece, when the terminal correctly implants in the terminal mounting hole of connector main part and goes into the constant head tank of terminal through the hook portion card of terminal pothook and fixes a position, the locking piece of secondary locking piece can not produce with the terminal pothook and interfere and realize the terminal position assurance function behind one's back that inserts the terminal pothook, when the terminal implants the spurious location, when the hook portion of terminal pothook fails to block in the constant head tank of terminal promptly, the terminal pushes away the hook portion that supports the terminal pothook and makes the terminal pothook pitch-up backward, press the in-process that secondary locking piece got into the locking position from the pre-installation position, the concave-convex structure that the relative tip of terminal pothook and locking piece set up can offset each other and produce and interfere, prevent secondary locking piece entering locking position, thereby examine and examine terminal spurious location. Thus, the electrical connector according to the embodiment of the present application enhances the ability of the terminal position assurance structure to detect the terminal implantation pseudo-positioning.

Drawings

The present application will be further described with reference to the accompanying drawings and examples, in which:

fig. 1 is a sectional view of a prior art electrical connector having a terminal position assurance feature in a state where the terminals are properly positioned for implantation;

fig. 2 is a cross-sectional view of the electrical connector shown in fig. 1 in a terminal implant pseudo-orientation;

fig. 3 is an exploded view of an electrical connector having a terminal position assurance structure according to one embodiment of the present application;

FIG. 4 is a schematic structural view of the connector body shown in FIG. 3;

FIG. 5 is a cross-sectional view of the construction of the connector body shown in FIG. 3;

FIG. 6 is a schematic structural view of the secondary latch of FIG. 3;

fig. 7 is a cross-sectional view of the electrical connector of fig. 3 with the terminals properly positioned for implantation and the secondary latch member in a pre-installed position;

fig. 8 is a cross-sectional view of the electrical connector of fig. 3 with the terminals properly positioned for implantation and the secondary latch member in the latched position;

FIG. 9 is a cross-sectional view of the electrical connector of FIG. 3 in a terminal implant pseudo-orientation with the secondary latch member in a pre-installed position;

fig. 10 is a cross-sectional view of the electrical connector of fig. 3 in a state wherein the terminal has been pseudo-implanted and the secondary latch has been moved from the pre-load position to the latched position.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. Also, the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

Fig. 3 is an exploded view of the electrical connector 20 having a terminal position assurance structure according to one embodiment of the present application. As shown in fig. 3, the electrical connector 20 is mainly composed of a connector main body 21, a plurality of terminals 22, and a secondary lock 23. Referring to fig. 3 in conjunction with fig. 4 and 5, the electrical connector main body 21 has a first end 211 and a second end 212, and a plurality of terminal mounting holes 24 are formed corresponding to the plurality of terminals 22 and extend from the first end 211 to the second end 212, and each terminal mounting hole 24 is provided with a terminal hook 25 extending toward the second end 212. The terminal hooks 25 are provided with hook portions 251 projecting inward of the terminal mounting holes 24, and have ribs 252 formed on the end surfaces facing the second end 212 of the connector body. Referring to fig. 3, each terminal 22 is provided with a positioning groove 221, and the terminal 22 is inserted into the terminal mounting hole 24 from the first end 211 to the second end 212 of the connector body 21 and then is clamped and positioned with the hook 251 of the terminal hook 25 through the positioning groove 221. Referring to fig. 3 in conjunction with fig. 6, secondary locking member 23 is installed into connector body 21 from second end 212 toward first end 211 of connector body 21 and has a pre-installed position and a locked position with respect to connector body 21. The secondary locking member 23 is provided with a locking piece 231 corresponding to each terminal mounting hole 24, and a recess 232 is opened in an end surface of the locking piece 231 facing the first end 211 of the connector body.

When the electrical connector 20 is assembled, the secondary locking member 23 is firstly implanted into a pre-assembly position in the connector main body 21, then the terminal 22 is implanted into the terminal mounting hole 24 of the connector main body 21 and positioned through the terminal hook 25, then the secondary locking member 23 is pressed to enable the secondary locking member to enter the locking position from the pre-assembly position, the locking block 231 of the secondary locking member 23 is inserted into the back of the terminal hook 25 in the terminal mounting hole 24 to abut against the terminal hook 25, and the hook portion 251 of the terminal hook 25 is prevented from being disengaged from the positioning groove 221 of the terminal 22, so that the terminal position ensuring function is realized. The specific positioning of the secondary locking member 23 in the pre-installed and locked positions within the connector body 21 is well within the skill of the art and will not be described in detail herein.

As described above, in the electrical connector 20 according to the above embodiment of the present application, the rib 252 is formed on the end surface of the terminal hook 25 facing the second end 212 of the connector main body, and the groove 232 is formed on the opposite end surface of the locking block 231, and the groove 232 can receive the rib 252. The rib 252 and the groove 232 form a concave-convex structure at the end of the terminal hook 25 facing the second end 212 of the connector body and the opposite end of the locking block 231 facing the first end 211 of the connector body, for abutting against each other to prevent the secondary locking member 23 from entering the locking position when the terminal is in the terminal implantation pseudo-positioning (i.e. when the hook 251 of the terminal hook 25 fails to be locked into the positioning slot 221 of the terminal 22), so as to detect the terminal implantation pseudo-positioning.

Referring specifically to fig. 7, when the secondary locking member 23 is in the pre-installed position in the connector main body 21 and the terminal 22 is correctly inserted into the terminal mounting hole 24 from the first end 211 to the second end 212 of the connector main body 21, the hook portion 251 of the terminal hook 25 is engaged in the positioning groove 221 of the terminal 22, and at this time, the terminal hook 25 does not lean back, and the terminal hook 25 and the locking block 231 do not interfere with each other. Referring to fig. 8 again, when the secondary locking member 23 is pressed downward to move from the pre-installed position to the locked position, the locking block 231 can be smoothly inserted into the back of the terminal hook 25 to abut against the terminal hook 25, so as to prevent the hook 251 of the terminal hook 25 from coming out of the positioning groove 221 of the terminal 22, thereby achieving the terminal position assurance function.

As further shown in fig. 9, when the secondary locking member 23 is at the pre-assembly position in the connector main body 21 and the terminal 22 is inserted into the terminal mounting hole 24 from the first end 211 to the second end 212 of the connector main body 21 and is in the pseudo-positioning state, that is, the hook portion 251 of the terminal hook 25 is not correctly inserted into the positioning groove 221 of the terminal 22, at this time, the terminal 22 pushes against the hook portion 251 of the terminal hook 25 to tilt the terminal hook 25 backward, and the locking block 231 interferes with the locking block 231 in the moving direction of the locking block 231 from the pre-assembly position to the locking position. Referring to fig. 10 again, in the downward movement process when the secondary locking member 23 is pressed from the pre-installed position to the locked position, the ribs 252 on the terminal hooks 25 are embedded into the grooves 232 formed on the opposite end surfaces of the locking block 231 to abut against each other, so as to prevent the secondary locking member 23 from entering the locked position, thereby detecting the terminal implantation false positioning. Specifically, the rib 252 is preferably disposed on a side of the end surface of the terminal hook 25 away from the hook 251, and correspondingly, the groove 232 is preferably disposed on a side of the opposite end surface of the locking block 231 close to the terminal hook 25, so that the terminal hook 25 is pushed against when the secondary locking member 23 is pressed as long as the terminal hook 25 is slightly tilted back, thereby effectively enhancing the capability of detecting the terminal implantation false positioning.

The mating concave-convex structures provided at the opposite ends of the terminal hook 25 and the locking piece 231 according to the different embodiments of the present application are not limited to the embodiments shown in the drawings, and various other suitable structural forms may be adopted. For example, the convex rib formed on the end surface of the terminal hook and the bayonet formed on the side of the opposite end part of the locking block close to the terminal hook form a matched concave-convex structure, and if the terminal hook tilts backwards, the convex rib on the terminal hook can be pushed into the bayonet of the locking block to realize the detection function.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (4)

1. An electric connector with a terminal position guarantee structure comprises a connector main body, a terminal and a secondary locking piece, wherein the connector main body is provided with a terminal mounting hole which is communicated to a second end from a first end, a terminal hook which extends towards the second end is arranged in the terminal mounting hole, the terminal is provided with a positioning groove, the terminal is implanted into the terminal mounting hole from the first end to the second end of the connector main body and is clamped with the hook part of the terminal hook through the positioning groove, the secondary locking piece is arranged into the connector main body from the second end to the first end of the connector main body and has a preassembly position and a locking position relative to the connector main body, the secondary locking piece is provided with a locking block which is inserted into the terminal hook in the terminal mounting hole from the preassembly position to the locking position so as to prop against the terminal hook, and the electric connector is characterized in that the end part of the terminal hook facing the second end of the connector main body and the opposite end part of the locking block facing the first end of the connector main body are also provided with a locking block Concave-convex structures are provided which are matched with each other so as to be mutually abutted when the hook part of the terminal hook is not clamped into the positioning groove of the terminal.

2. The electrical connector with terminal position assurance structure of claim 1, wherein the concavo-convex structure includes a rib formed on an end surface of the terminal hook facing the second end of the connector body and a groove opened on an opposite end surface of the lock block for receiving the rib.

3. The electrical connector with terminal position assurance structure of claim 2, wherein the rib is provided on a side of the end surface of the terminal hook remote from the hook portion, and the groove is provided on a side of the opposite end surface of the locking piece close to the terminal hook.

4. The electrical connector with terminal position assurance structure of claim 1, wherein the concave-convex structure comprises a rib formed on an end surface of the terminal hook facing the second end of the connector body and a bayonet formed on a side of the opposite end of the locking block near the terminal hook for abutting against the rib.

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