Two-section unlocked connector and connector assembly

Abstract

The invention relates to a two-section unlocking connector and a connector assembly. The connector is provided with a first limiting structure matched with an opposite-end connector, and the first limiting structure comprises a limiting elastic arm extending along the plugging direction; the clamping handle is connected below a second pressing part at the front end of the limiting elastic arm; and the at least one clamping block is connected to at least one side of the clamping handle. When the clamping handle is lifted and then rebounds to be clamped with the opposite-end connector in a matched mode in the inserting process, the clamping block rebounds along with the clamping handle to slap the opposite-end connector to generate positioning sound. After a first pressing part at the rear end of the limiting elastic arm is pressed to lift the clamping handle to release the clamping connection with the opposite-end connector, the connector is retreated until the clamping block is matched and propped against the opposite-end connector, and one section of the connector is unlocked; and after the second pressing part is pressed to enable the clamping handle to move downwards with the clamping block to relieve abutting and move backwards to cross the limitation of the opposite-end connector, the clamping block rebounds and slaps the opposite-end connector to generate positioning sound, and the second section of the connector is unlocked. According to the connector assembly, the self-detection function is enhanced.

Description

Technical Field

[0001] The present application relates to an electrical connector, and more particularly to a two-stage unlocking connector and a connector assembly. Background Art

[0002] For safety reasons, high-voltage connectors usually have two sets of circuits: power terminals and signal terminals. The signal circuit controls the power circuit. Only when the signal circuit is turned on can the power circuit be turned on. The unlocking of the high-voltage connector is designed to be unlocked in two stages, that is, one stage of unlocking that disconnects the low-voltage signal terminal and two stages of unlocking that disconnects the high-voltage power terminal. However, the existing high-voltage connectors will absorb the positioning sound when the connector is plugged in and unlocked due to the influence of the seal. This situation causes the OEM to be unable to detect whether the connector is mated or unlocked in place when installing the connector, which easily leads to problems such as the connector not being mated in place or repeated detection of the connector installation. Summary of the invention

[0003] The technical problem to be solved by the present application is to provide a two-stage unlocking connector and a connector assembly that can enhance the detection function during the mating, plugging and unlocking processes in view of the above-mentioned defects of the prior art.

[0004] In order to solve its technical problem, the present application proposes a two-stage unlocking connector in the first aspect, which is provided with a first limiting structure that cooperates with a mating connector at the opposite end, and the first limiting structure includes: a limiting spring arm extending along the plugging direction of the connector, the limiting spring arm forming a first pressing portion at the rear end in the plugging direction, and a second pressing portion at the front end, and a support arm is provided at a position between the first pressing portion and the second pressing portion to support the connector, so that the first pressing portion and the second pressing portion both have upper and lower elastic deformation space with the support arm as a fulcrum; a clamping handle connected to the bottom of the second pressing portion of the limiting spring arm; and at least one clamping block connected to at least one of the two sides of the clamping handle in the plugging direction; the clamping handle is connected to the connector during the plugging process between the connector and the opposite connector. After being lifted during the process, when it rebounds under the elastic force of the second pressing part and engages with the opposite connector, the connector is in a locked position, and the at least one locking block rebounds together with the locking handle and hits the opposite connector to produce a positioning sound; after pressing the first pressing part to make the second pressing part lift up with the locking handle to release the engagement with the opposite connector, the connector is moved backward until the at least one locking block engages with the opposite connector, and the connector completes one stage of unlocking; after continuing to press the second pressing part to make the locking handle move downward with the at least one locking block to release the engagement with the opposite connector and move backward beyond the restriction of the opposite connector, the at least one locking block rebounds under the elastic force of the second pressing part and hits the opposite connector to produce a positioning sound, and the connector completes the second stage of unlocking.

[0005] According to an embodiment of the connector described in the first aspect of the present application, the limiting elastic arm is respectively provided with a first support arm and a second support arm on both sides of the position between the first pressing portion and the second pressing portion and is supported and connected to the connector, so that the first pressing portion and the second pressing portion both have upper and lower elastic deformation space with the first support arm and the second support arm as fulcrums.

[0006] According to one embodiment of the connector described in the first aspect of the present application, an inverted U-shaped mounting frame is arranged on the outside of the connector and a slot extending along the plug-in direction is opened on the top of the inverted U-shaped mounting frame, and the first support arm and the second support arm of the limiting elastic arm are respectively connected to the two sides of the slot to support the limiting elastic arm in the slot.

[0007] According to an embodiment of the connector described in the first aspect of the present application, a first connecting rib and a second connecting rib extending from the first pressing portion to the second pressing portion are arranged on both sides of the bottom of the limiting spring arm, the clamping handle is connected between the lower front ends of the first connecting rib and the second connecting rib, and the at least one clamping block includes a first clamping block and a second clamping block respectively connected to the outer sides of the first connecting rib and the second connecting rib opposite to the clamping handle.

[0008] In order to solve its technical problem, the present application proposes a two-stage unlocking connector assembly in the second aspect, including a first connector and a second connector that are matingly plugged in, the first connector and the second connector are respectively provided with a first limiting structure and a second limiting structure that match each other, the first limiting structure comprising: a limiting elastic arm extending along the plug-in direction of the first connector, the limiting elastic arm forming a first pressing portion at the rear end in the plug-in direction, and a second pressing portion at the front end, and a support arm is provided at a position between the first pressing portion and the second pressing portion to support the first connector, so that the first pressing portion and the second pressing portion both have an upper and lower elastic deformation space with the support arm as a fulcrum; a clamping handle connected to the bottom of the second pressing portion of the limiting elastic arm; and at least one clamping block connected to at least one of the two sides of the clamping handle in the plug-in direction; the second limiting structure comprises: a buckle protrusion that is opposite to the buckle protrusion of the first connector in the plug-in direction and forms an interference fit; and a buckle protrusion that is provided above at least one of the two sides in the plug-in direction of the buckle protrusion and is respectively connected to the first connector At least one locking block is directly opposite to and forms at least one limiting protrusion with an interference fit; when the locking handle is lifted by the locking protrusion during the plugging process of the first connector and the second connector, and then rebounds under the elastic force of the second pressing part to engage with the locking protrusion, the first connector and the second connector are in a locked position, and the at least one locking block rebounds together with the locking handle to hit the second connector to produce a positioning sound; after pressing the first pressing part of the first connector to make the second pressing part lift up with the locking handle to release the engagement with the locking protrusion, and then move the first connector backward until the at least one locking block engages with the at least one limiting protrusion, the first connector and the second connector are unlocked in one section; continue to press the second pressing part to make the locking handle move downward with the at least one locking block, release the abutment with the at least one limiting protrusion and move backward beyond the restriction of the at least one limiting protrusion, the at least one locking block rebounds under the elastic force of the second pressing part to hit the second connector to produce a positioning sound, and the first connector and the second connector are unlocked in two sections.

[0009] According to an embodiment of the connector assembly described in the second aspect of the present application, the limiting elastic arm is respectively provided with a first support arm and a second support arm on both sides of the position between the first pressing portion and the second pressing portion and is supported and connected to the first connector, so that the first pressing portion and the second pressing portion both have upper and lower elastic deformation space with the first support arm and the second support arm as fulcrums.

[0010] According to one embodiment of the connector assembly described in the second aspect of the present application, an inverted U-shaped mounting frame is arranged on the outside of the first connector and a slot extending along the plug-in direction is opened on the top of the inverted U-shaped mounting frame, and the first support arm and the second support arm of the limiting elastic arm are respectively connected to the two sides of the slot to support the limiting elastic arm in the slot.

[0011] According to an embodiment of the connector assembly described in the second aspect of the present application, a first connecting rib and a second connecting rib extending from the first pressing portion to the second pressing portion are arranged on both sides of the bottom of the limiting spring arm, the clamping handle is connected between the lower front ends of the first connecting rib and the second connecting rib, and the at least one clamping block includes a first clamping block and a second clamping block respectively connected to the outer sides of the first connecting rib and the second connecting rib opposite to the clamping handle.

[0012] According to an embodiment of the connector assembly described in the second aspect of the present application, the two sides of the snap-on protrusion on the second connector are respectively provided with a first rib and a second rib that are inserted into the mounting frame when mating and plugging with the first connector, and the at least one limiting protrusion includes a first limiting protrusion and a second limiting protrusion that are arranged on the relative inner sides of the first rib and the second rib.

[0013] According to an embodiment of the connector assembly described in the second aspect of the present application, the front end of the snap protrusion in the plug-in direction forms a vertical snap surface, and the rear end forms a first guide slope; the front end of the limiting protrusion in the plug-in direction forms a vertical abutment surface, and the rear end forms a second guide slope.

[0014] The two-stage unlocking connector and connector assembly of the present application have the following beneficial effects:

[0015] The connector with two-stage unlocking according to the embodiment of the present application realizes one-stage locking of the connector through the interference fit between the clamping handle at the front end of the limiting elastic arm and the buckle protrusion on the opposite connector, and realizes one-stage unlocking by pressing the first pressing part at the rear end of the limiting elastic arm to lift the clamping handle to release the clamping connection, and realizes two-stage unlocking by pressing the second pressing part at the front end of the limiting elastic arm to move at least one clamping block connected to at least one side of the clamping handle downward to release the contact with at least one limiting protrusion on the opposite connector. Therefore, the connector according to the embodiment of the present application can realize one-stage locking and two-stage unlocking in one piece without the aid of additional accessories.

[0016] When the first connector and the second connector of the connector assembly according to the embodiment of the present application are plugged in and matched, the card handle is lifted by the buckle protrusion and then rebounds and falls, and the card block connected to the card handle rebounds and hits the second connector, producing a crisp and obvious positioning sound, thereby detecting that the connector assembly is plugged in and matched in place; when the second stage is unlocked, the card block moves down and crosses the limit of the limit protrusion and then rebounds upward to hit the limit protrusion, producing a crisp and obvious positioning sound, thereby detecting that the second stage is unlocked. Therefore, the connector assembly according to the embodiment of the present application can produce a clear positioning sound at each node of mating, plugging and unlocking, enhance the self-detection function of the connector assembly, avoid multiple plugging and unplugging and repeated inspections by the host factory during the assembly process, and improve the practicality of the connector assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present application will be further described below with reference to the accompanying drawings and embodiments, in which:

[0018] Figure 1 It is a schematic diagram of the locked state structure of a connector assembly according to an embodiment of the present application;

[0019] Figure 2 yes Figure 1 A schematic structural diagram of the first connector shown in ;

[0020] Figure 3 yes Figure 1 A schematic diagram of the structure of the second connector shown in ;

[0021] Figure 4 yes Figure 1 A longitudinal structural cross-sectional view of the connector assembly in a locked state shown;

[0022] Figure 5 yes Figure 1 A transverse structural cross-sectional view of the connector assembly in a locked state;

[0023] Figure 6 yes Figure 1 A top view of the structure of the first connector in the connector assembly shown in the second unlocking position;

[0024] Figure 7 yes Figure 6 Structural cross-section view along the AA axis;

[0025] Figure 8 yes Figure 6 Structural cross-section view along the BB axis.

[0026] Description of the accompanying drawings: 100-connector assembly; 10-first connector; 11-mounting frame; 12-notch; 20-second connector; 21-outer surface; 30-first limiting structure; 31-limiting elastic arm; 311-first pressing portion; 312-second pressing portion; 313a-first support arm; 313b-second support arm; 314-first pressing mark; 315-second pressing mark; 32a-first connecting rib; 32b-second Connecting ribs; 33-clamping handle; 331-clamping surface; 34a-first clamping block; 34b-second clamping block; 341-rear end surface; 40-second limiting structure; 41-clamping protrusion; 411-clamping surface; 412-first guiding slope; 42a-first convex rib; 42b-second convex rib; 43a-first limiting protrusion; 43b-second limiting protrusion; 431-butt surface; 432-extrusion surface; 433-second guiding slope; 50-arrow. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. In addition, the embodiments in the present application and the features in the embodiments may be combined with each other in the absence of conflict.

[0028] Figure 1 FIG. 1 shows a schematic diagram of a locked state structure of a connector assembly 100 according to an embodiment of the present application. Figure 2 The structural schematic diagram of the first connector 10 is shown separately. Figure 3 The schematic diagram of the structure of the second connector 20 is shown separately. Figures 1 to 3 As shown, the connector assembly 100 includes a first connector 10 and a second connector 20 that are matingly plugged in. The first connector 10 is provided with a first limiting structure 30, and the second connector 20 is provided with a second limiting structure 40. The first limiting structure 30 and the second limiting structure 40 cooperate to achieve mating locking and two-stage unlocking of the first connector 10 and the second connector 20 to ensure the connection reliability and safety of the connector assembly 100.

[0029] See Figure 1 Combination Figure 2 As shown, an inverted U-shaped mounting frame 11 is disposed outside the first connector 10, and a notch 12 extending along the plugging direction of the first connector 10 is provided at the top of the inverted U-shaped mounting frame 11, and the first limiting structure 30 is disposed in the notch 12. It should be noted that the expression "plugging direction" that appears later in this document refers to the plugging direction of the first electrical connector 10 plugging into the second electrical connector 20 (see Figure 4 See further Figure 1 As shown, the first limiting structure 30 includes a limiting elastic arm 31, which extends along the plug-in direction of the first connector 10, forms a first pressing portion 311 at the rear end in the plug-in direction, and forms a second pressing portion 312 at the front end, and respectively sets a first support arm 313a and a second support arm 313b on the left and right sides of the middle position between the first pressing portion 311 and the second pressing portion 312 to connect with the left and right sides of the slot 12, so as to support the entire limiting elastic arm 31 in the slot 12, so that the first pressing portion 311 and the second pressing portion 312 can have a certain vertical elastic deformation space with the first support arm 313a and the second support arm 313b as fulcrums. Figure 2 As shown, the first limiting structure 30 also includes a handle 33 connected to the lower part of the second pressing portion 312 of the limiting elastic arm 31 and a first block 34a and a second block 34b connected to the left and right sides of the handle 33 in the insertion direction. Figure 2As shown, the first connecting rib 32a and the second connecting rib 32b are arranged at intervals on both sides of the bottom of the limiting elastic arm 31. The first connecting rib 32a and the second connecting rib 32b extend from the first pressing portion 311 to the second pressing portion 312 at the bottom of the limiting elastic arm 31. The clamping handle 33 is connected between the front lower parts of the first connecting rib 32a and the second connecting rib 32b. The first clamping block 34a and the second clamping block 34b are respectively connected to the outer sides of the first connecting rib 32a and the second connecting rib 32b opposite to the clamping handle 33. In this way, the clamping handle 33 is connected to the second pressing portion 312 of the limiting elastic arm 31 through the band-shaped force arm formed by the first connecting rib 32a and the second connecting rib 32b. Whether the second pressing portion 312 is lifted or pressed, the clamping handle 33 and the first clamping block 34a and the second clamping block 34b on both sides thereof can be displaced by the same distance, and the force required for lifting or pressing into place is reduced.

[0030] See also Figure 3 As shown, the second limiting structure 40 of the second connector 20 includes a snap-on protrusion 41 provided on the outer surface 21 of the second connector 20, and the snap-on protrusion 41 is opposite to the latch handle 33 of the first connector 10 in the plug-in direction and forms an interference fit. Preferably, the front end of the snap-on protrusion 41 in the plug-in direction forms a vertical snap-on surface 411, and the rear end forms a first guiding inclined surface 412. The second limiting structure 40 also includes a first limiting protrusion 43a and a second limiting protrusion 43b provided on both sides of the rear of the snap-on protrusion 41 in the plug-in direction, and the first limiting protrusion 43a and the second limiting protrusion 43b are opposite to the first clamping block 34a and the second clamping block 34b of the first connector 10 in the plug-in direction and form an interference fit. For details, see Figure 3 As shown, the first convex rib 42a and the second convex rib 42b extending in the plugging direction are respectively provided on both sides of the buckle protrusion 41 on the outer surface 21 of the second connector 20, and the first limiting protrusion 43a and the second limiting protrusion 43b are respectively provided on the opposite inner sides of the first convex rib 42a and the second convex rib 42b, and there is a certain distance between them and the outer surface 21, and the distance can allow the first clamping block 34a and the second clamping block 34b on the first connector 10 to pass through. Preferably, the first limiting protrusion 43a and the second limiting protrusion 43b respectively form a vertical abutting surface 431 at the front end in the plugging direction, and form a second guiding inclined surface 432 at the rear end. When the first connector 10 is mated and plugged with the second connector 20, the first rib 42a and the second rib 42b on the second connector 20 can be inserted into the installation frame 11 on the first connector 10 to provide a certain guiding effect, so that the snap protrusion 41 is opposite to the handle 33 located in the installation frame 11, and the first limiting protrusion 43a and the second limiting protrusion 43b are opposite to the first block 34a and the second block 34b located in the installation frame 11 respectively.

[0031] The first connector 10 and the second connector 20 of the connector assembly 100 according to the above embodiment of the present application cooperate with the above first limiting structure 30 and the second limiting structure 40 to achieve one-stage locking and two-stage unlocking. Figure 4 and Figure 5 As shown, during the process of the first connector 10 being mated and plugged with the second connector 20 along the plugging direction indicated by the arrow 50, the first clamping block 34a and the second clamping block 34b on both sides of the clamping handle 33 first move downward along the second guiding inclined surface 432 due to the interference fit with the first limiting protrusion 43a and the second limiting protrusion 43b, thereby passing smoothly under the first limiting protrusion 43a and the second limiting protrusion 43b, and then the clamping handle 33 is lifted along the first guiding inclined surface 412 due to the interference fit with the buckle protrusion 41, causing the second pressing portion 312 of the limiting cantilever 31 to undergo elastic deformation to deflect upward, and then when the clamping handle 33 passes over the buckle protrusion 41, the clamping handle 33 rebounds under the elastic force of the second pressing portion 312, and the clamping surface 331 at the rear end of the clamping handle 33 cooperates with the buckle surface 411 at the front end of the buckle protrusion 41 to form a clamping connection, and the first connector 10 and the second connector 20 are in a locked position. At the same time, the latch handle 33 is lifted by the latch protrusion 33 and then rebounds and falls, and the first and second latch blocks 34a, 34b connected to the two sides of the latch handle 33 rebound and hit the second connector 20, producing a crisp and obvious positioning sound, so that the first connector 10 and the second connector 20 can be detected to be properly plugged in. When unlocking the first connector 10 and the second connector 20, see Figure 4 As shown in the figure, firstly, the first pressing portion 311 at the rear end of the limiting cantilever 31 is pressed, which will cause the second pressing portion 312 at the front end of the limiting cantilever 31 to lift up the clamping handle 33 connected below through elastic deformation, thereby releasing the clamping handle from the buckle protrusion 41, and then the first connector 10 is moved backward until the rear end surfaces 341 of the first clamping block 34a and the second clamping block 34b on both sides of the clamping handle 33 respectively cooperate with the abutting surfaces 431 at the front ends of the first limiting protrusion 43a and the second limiting protrusion 43b, see Figure 8 As shown, the first connector 10 cannot move backward any further, and the first connector 10 and the second connector 20 complete the first unlocking and are in the second unlocking position. Figure 7 and Figure 8As shown, there is a gap between the latch handle 33 on the first connector 10 and the first guiding slope 412 of the snap protrusion 41 on the second connector 20. At this time, pressing the second pressing portion 312 at the front end of the limiting cantilever 31 will cause the latch handle 33 to move downward, and move the first clamping block 34a and the second clamping block 34b on both sides downward together, thereby releasing the abutment with the first limiting protrusion 43a and the second limiting protrusion 43b. When pressing the second pressing portion 312 to drive the latch handle 33 to move downward and be squeezed against the first guiding inclined surface 412, the latch handle 33 will move backward while moving downward along the first guiding inclined surface 412, carrying the first latch block 34a and the second latch block 34b to move below the first limiting protrusion 43a and the second limiting protrusion 43b and be squeezed by the squeezing surface 432 at the bottom of the first limiting protrusion 43a and the second limiting protrusion 43b, and then the first connector 10 is moved backward until the first latch block 34a and the second latch block 34b pass over the squeezing surface 432 at the bottom of the first limiting protrusion 43a and the second limiting protrusion 43b, the first latch block 34a and the second latch block 34b will rebound under the elastic force of the second pressing portion 312 to hit the second guiding inclined surface 433 at the rear end of the first limiting protrusion 43a and the second limiting protrusion 43b, producing a crisp and obvious positioning sound, thereby detecting that the first connector 10 and the second connector 20 have completed the second stage unlocking.

[0032] To facilitate the user to unlock the first connector 10 and the second connector 20 that are plugged into place, see Figure 1 As shown, the first pressing portion 311 and the second pressing portion 312 on the limiting cantilever 31 may also be provided with a first pressing mark 314 (for example, the number "1") and a second pressing mark 315 (for example, the number "2") to guide the user to perform the first and second unlocking operations.

[0033] According to the first connector 10 of the above embodiment of the present application, the one-piece first limiting structure 10 consisting of the limiting elastic arm 31, the clamping handle 33 connected to the lower front end of the limiting elastic arm 31, and the first clamping block 34a and the second clamping block 34b connected to the two sides of the clamping handle 33 can achieve one-stage locking and two-stage unlocking with the second connector 20 for mating and plugging, without the need for additional accessories. According to the connector assembly 100 of the above embodiment of the present application, a clear positioning sound can be generated at each node of the mating, plugging and unlocking of the first connector 10 and the second connector 20, thereby enhancing the self-detection function of the connector assembly 100, avoiding multiple plugging and unplugging and repeated inspections by the host manufacturer during the assembly process, and improving the practicality of the connector assembly 100.

[0034] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A two-stage unlocking connector, provided with a first limit structure for cooperating with a mating connector at the opposite end, characterized in that: The first limiting structure comprises: A limit spring arm extending along the plugging direction of the connector, wherein the limit spring arm has a first pressing portion formed at the rear end in the plugging direction and a second pressing portion formed at the front end, and a support arm is provided between the first pressing portion and the second pressing portion to support the connector, so that the first pressing portion and the second pressing portion both have an upper and lower elastic deformation space with the support arm as a fulcrum; A clamping handle connected to the lower portion of the second pressing portion of the position-limiting elastic arm; and At least one card block connected to at least one of the two sides of the card handle in the plugging direction; When the latch handle is lifted during the plugging process between the connector and the opposite connector, it rebounds under the elastic force of the second pressing portion to engage with the opposite connector, and when the connector is in a locked position, the at least one latch block rebounds with the latch handle and hits the opposite connector to produce a positioning sound; After pressing the first pressing portion to lift the second pressing portion with the clamping handle to release the clamping connection with the opposite connector, the connector is moved backward until the at least one clamping block is matingly abutted with the opposite connector, and the connector completes a stage of unlocking; Continue to press the second pressing part to make the handle move downward with the at least one card block to release the contact with the opposite connector and move backward to cross the restriction of the opposite connector. Then, the at least one card block rebounds and hits the opposite connector under the elastic force of the second pressing part to produce a positioning sound, and the connector completes the second-stage unlocking.

2. The connector according to claim 1, characterized in that: The limiting elastic arm is respectively provided with a first support arm and a second support arm on both sides of the position between the first pressing part and the second pressing part and is supported and connected to the connector, so that the first pressing part and the second pressing part both have upper and lower elastic deformation space with the first support arm and the second support arm as fulcrums.

3. The connector according to claim 2, characterized in that: An inverted U-shaped mounting frame is arranged outside the connector and a slot extending along the plugging direction is opened on the top of the inverted U-shaped mounting frame, and the first support arm and the second support arm of the limiting elastic arm are respectively connected to the two sides of the slot to support the limiting elastic arm in the slot.

4. The connector according to claim 3, characterized in that: The first and second connecting ribs extending from the first pressing part to the second pressing part are arranged on both sides of the bottom of the limiting elastic arm, the clamping handle is connected between the lower front ends of the first and second connecting ribs, and the at least one clamping block includes a first and second clamping block respectively connected to the outer sides of the first and second connecting ribs opposite to the clamping handle.

5. A two-stage unlocking connector assembly, comprising a first connector and a second connector that are mated and plugged together, wherein the first connector and the second connector are respectively provided with a first limiting structure and a second limiting structure that match each other, characterized in that: The first limiting structure comprises: A limit spring arm extending along the plugging direction of the first connector, wherein the limit spring arm has a first pressing portion formed at the rear end in the plugging direction and a second pressing portion formed at the front end, and a support arm is provided between the first pressing portion and the second pressing portion to support the first connector, so that the first pressing portion and the second pressing portion both have an upper and lower elastic deformation space with the support arm as a fulcrum; A clamping handle connected to the lower portion of the second pressing portion of the position-limiting elastic arm; and At least one card block connected to at least one of the two sides of the card handle in the plugging direction; The second limiting structure comprises: A buckle protrusion facing the clamping handle of the first connector in the plugging direction and forming an interference fit; and At least one limiting protrusion is arranged above at least one of the two sides of the buckle protrusion in the plugging direction, and is respectively opposite to the at least one clamping block of the first connector and forms an interference fit; When the latch handle is lifted by the latch protrusion during the plugging process between the first connector and the second connector, and then rebounds under the elastic force of the second pressing portion to engage with the latch protrusion, the first connector and the second connector are in a locked position, and the at least one latch block rebounds with the latch handle and hits the second connector to produce a positioning sound; After pressing the first pressing portion of the first connector to lift the second pressing portion with the latch handle to release the latching connection with the latching protrusion, the first connector is moved backward until the at least one latch block is matingly abutted with the at least one limiting protrusion, and the first connector and the second connector are partially unlocked; Continue to press the second pressing part to move the handle downward with the at least one locking block, and after releasing the contact with the at least one limiting protrusion and moving backward beyond the restriction of the at least one limiting protrusion, the at least one locking block rebounds under the elastic force of the second pressing part and hits the second connector to produce a positioning sound, and the first connector and the second connector are unlocked in two sections.

6. The connector assembly according to claim 5, characterized in that: The limiting elastic arm is respectively provided with a first support arm and a second support arm on both sides of the position between the first pressing part and the second pressing part and is supported and connected to the first connector, so that the first pressing part and the second pressing part both have upper and lower elastic deformation space with the first support arm and the second support arm as fulcrums.

7. The connector assembly according to claim 6, characterized in that: An inverted U-shaped mounting frame is arranged outside the first connector, and a slot extending along the plugging direction is opened on the top of the inverted U-shaped mounting frame, and the first support arm and the second support arm of the limiting elastic arm are respectively connected to the two sides of the slot to support the limiting elastic arm in the slot.

8. The connector assembly according to claim 7, characterized in that: The first and second connecting ribs extending from the first pressing part to the second pressing part are arranged on both sides of the bottom of the limiting elastic arm, the clamping handle is connected between the lower front ends of the first and second connecting ribs, and the at least one clamping block includes a first and second clamping block respectively connected to the outer sides of the first and second connecting ribs opposite to the clamping handle.

9. The connector assembly according to claim 8, characterized in that: The two sides of the snap-on protrusion on the second connector are respectively provided with a first convex rib and a second convex rib which are inserted into the installation frame when mating and plugging with the first connector, and the at least one limiting protrusion includes a first limiting protrusion and a second limiting protrusion which are arranged on the relative inner sides of the first convex rib and the second convex rib.

10. The connector assembly according to claim 5, characterized in that The front end of the buckle protrusion in the plugging direction forms a vertical buckle surface, and the rear end forms a first guiding inclined surface; the front end of the limiting protrusion in the plugging direction forms a vertical abutting surface, and the rear end forms a second guiding inclined surface.

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