Internal locking structure of high-voltage connector

Abstract

The invention relates to the technical field of electrical connection, in particular to an internal locking structure of a high-voltage connector, which solves the problem that the locking structure in the prior art is arranged outside a socket connector and is high in damage risk, and comprises a plug shell and a socket shell, the plug shell is in plug-in connection with the socket shell, the plug shell is connected with a locking sheet, and the locking sheet is connected with the socket shell. And the plug shell and the locking sheet are positioned on the inner side of the socket shell. The beneficial effects are that after the connector is plugged in, the socket housing wraps the plug housing and the locking sheet, at the moment, the socket housing forms good external protection for the plug elastic sheet and the locking sheet, the risk that the plug elastic sheet and the locking sheet are damaged by collision and external force is relatively small, and the structural use safety of the connector is ensured; in addition, after the plug shell and the locking piece are wrapped by the socket shell, the overall external structure of the connector is simple, the socket shell of the connector and the equipment shell can be subjected to integrated design processing, and the integration difficulty is simplified.

Description

Technical Field

[0001] The invention relates to the technical field of electrical connection, and in particular to an inner locking structure of a high-voltage connector. Background Art

[0002] With the development of the new energy electric vehicle industry, the use of high-voltage connectors in the whole vehicle is becoming more and more frequent. Various complex wiring environments have also caused the wiring harness factory to have higher and higher requirements on the performance indicators of high-voltage connectors. Among them, the reliability of terminal fixation is one of the more prominent ones. For high-voltage connectors, the CPA locking structure after the plug and socket are plugged in can effectively prompt the connector to be plugged in place, preventing accidental unlocking caused by mis-touch after plugging.

[0003] The existing CPA structure is only applicable to the use scenario where the plug shell wraps the socket shell. For example, the patent with publication number CN114122829A in the prior art discloses an electrical connection device and a plug connector, which includes: a socket connector and a plug connector, the socket connector includes a socket shell, the plug connector includes a plug shell and a lock, and the front end of the plug shell is plugged into the socket shell; the outer wall of the socket shell is provided with a first lock; the plug shell is provided with a first torsion bar mechanism, the first torsion bar mechanism is provided with a first lock hook, the first lock hook is clamped on the front side of the first lock to prevent the plug shell from moving backward relative to the socket shell, and the first torsion bar mechanism can drive the first lock hook to disengage from the first lock under the action of external force; the lock is provided with a first boss, the lock is connected to the plug shell, and the first boss can prevent the first torsion bar mechanism from moving under the action of external force.

[0004] After the plug connector and the socket connector of the above-mentioned electrical connector are plugged into each other, the locker locks the plug connector and the socket connector, wherein after the locker is installed, the locker is located on the outside of the socket connector; when the electrical connector is in use, no external protection can be formed, which increases the risk of damage to the locker due to bumps and external forces, and is not conducive to the integrated processing of the socket connector and the equipment. Summary of the invention

[0005] The present invention provides a high-voltage connector internal locking structure, which solves the problem in the prior art that the locking structure is arranged outside the socket connector and has a high risk of damage.

[0006] The technical solution of the present invention is achieved in this way: A high-voltage connector internal locking structure includes a plug housing and a socket housing, the plug housing and the socket housing are plug-connected, a locking plate is connected to the plug housing, and the plug housing and the locking plate are both located on the inner side of the socket housing. After the connectors are plugged in, the socket housing wraps the plug housing, and the socket housing wraps the plug shrapnel and the locking plate on the plug housing inside. At this time, the socket housing forms a good external protection for the plug shrapnel and the locking plate, and the risk of the plug shrapnel and the locking plate being damaged by bumps and external forces is relatively small, ensuring the safety of the connector structure; in addition, after the socket housing wraps the plug housing and the locking plate, the overall external structure of the connector is simple, which is conducive to the integrated design and processing of the socket housing and the equipment housing of the connector, simplifying the difficulty of integration.

[0007] The plug housing is provided with a plug spring, a plug hanging platform is provided on the outside of the plug spring, a hanging hole is provided on the side wall of the socket housing, and the plug hanging platform cooperates with the hanging hole. Since the socket housing wraps the plug housing, after the connectors are plugged in, the plug spring on the plug housing is also located on the inside of the socket housing. When the connector is unlocked, the plug spring is pressed downward, and the plug hanging platform is unlocked from the hanging hole. When the downward pressing method is adopted, the movable range of the plug spring is limited, and the outer wall of the plug housing will limit the plug spring, so that the plug spring will not be deformed too much, fail or break, thereby ensuring the stability of the use of the plug spring.

[0008] The locking piece is slidably arranged on the plug housing, and the locking piece includes a first cantilever and a second cantilever arranged in the same direction, a front stop assembly is provided between the first cantilever and the plug housing, a rear stop assembly is provided between the second cantilever and the plug housing; a pre-installation position unlocking assembly is provided between the first cantilever and the socket housing. The locking piece slides on the plug housing to switch between the pre-installation position and the fully assembled position on the plug housing, and the front stop assembly and the rear stop assembly work together to place the locking piece in the pre-installation position on the plug housing, and the pre-installation position unlocking assembly can unlock the front stop assembly, so that the locking piece can slide forward to the fully assembled position.

[0009] The front stop assembly includes a front stop boss and a front stop hanging platform. The front stop boss is arranged on the plug housing, and the front stop hanging platform is arranged in the middle of the first cantilever. When the locking piece is in the pre-installed position on the plug housing, the front stop boss cooperates with the front of the front stop hanging platform. The front stop hanging platform cooperates with the front stop boss to prevent the locking piece from sliding forward, thereby limiting the forward direction of the locking piece.

[0010] The rear side of the front stop bracket is an inclined surface, and the front side of the front stop bracket is a vertical surface. The inclined rear side of the front stop bracket facilitates the front stop boss to pass over the front stop bracket when the locking plate is unlocked, thereby unlocking the locking plate; the vertical front side of the front stop bracket can prevent the front stop boss from passing over the front stop bracket, thereby ensuring the stability of the limit position of the locking plate in the forward direction.

[0011] The rear stop assembly includes a rear stop boss and a rear stop hanging platform, wherein the rear stop boss is arranged on the plug housing, and the rear stop hanging platform is arranged at the head of the second cantilever; when the locking piece is in the pre-installed position on the plug housing, the front of the rear stop boss and the rear of the rear stop hanging platform cooperate. The rear stop hanging platform cooperates with the rear stop boss to prevent the locking piece from sliding backwards, thereby limiting the backward direction of the locking piece.

[0012] The pre-installed unlocking assembly includes a locking plate pressing platform and a socket pressing platform. The locking plate pressing platform is arranged at the head of the first cantilever, and the socket pressing platform is arranged on the inner wall of the socket housing. The locking plate pressing platform and the socket pressing platform are crimped together. When the locking plate is in the fully assembled position on the plug housing, the socket pressing platform is located between the locking plate pressing platform and the front stop hanging platform. After the plug housing and the socket housing are fully inserted into place, the socket pressing platform presses down the locking plate pressing platform to unlock the front stop hanging platform and the front stop boss, thereby enabling the locking plate to move forward. When the locking plate is in the fully assembled position, the locking plate is in a relaxed state and is not affected by external forces, which is conducive to the long-term and stable use of the connector.

[0013] The plug housing is provided with a guide groove, the locking piece is provided with a guide bar, the guide groove and the guide bar are slidably matched, the guide groove guides the moving direction of the locking piece, and ensures that the locking piece is accurately installed.

[0014] The plug housing is provided with an arc-shaped boss, which is located at the rear side of the front stop boss, and the side of the first cantilever is provided with an arc-shaped groove, and the arc-shaped boss cooperates with the arc-shaped groove. Before the locking plate is fully installed in place, the arc-shaped boss supports the first cantilever, and after the locking plate is fully assembled in place, the arc-shaped boss is inserted into the arc-shaped groove, which can remind the staff that the locking plate is installed in place; and the cooperation between the arc-shaped boss and the arc-shaped groove can prevent the locking plate from being separated from the fully assembled position, thereby ensuring the stability of the locking plate in use.

[0015] The tail of the second cantilever is provided with a support platform, and when the locking piece is in a fully assembled position on the plug housing, the support platform and the end of the plug spring piece are supported and matched. The support platform provides support for the plug spring piece so that the plug spring piece cannot be pressed down, thereby achieving the locking of the connector.

[0016] The beneficial effects produced by the present invention are: 1. After the connectors are plugged in, the socket housing wraps the plug housing and the locking piece inside. At this time, the socket housing forms good external protection for the plug spring piece and the locking piece. The risk of the plug spring piece and the locking piece being damaged by bumps and external forces is relatively small, ensuring the safety of the connector structure. In addition, after the socket housing wraps the plug housing and the locking piece, the overall external structure of the connector is simple, which is conducive to the integrated design of the socket housing and the equipment housing of the connector, simplifying the difficulty of integration.

[0017] 2. The plug housing is located inside the socket housing. When unlocking the connector, press the plug spring downward to unlock the plug hanging platform and the hanging hole. When pressing downward, the activity range of the plug spring is limited. The outer wall of the plug housing will limit the plug spring, and the plug spring will not be deformed too much, fail or break, thereby ensuring the stability of the plug spring.

[0018] 3. After the plug housing and the socket housing are inserted into place, the pre-installed unlocking component unlocks the forward square of the locking plate to ensure that the plug housing and the socket housing are fully inserted.

[0019] 4. After the locking plate is installed in place, the locking plate pressure plate passes over the socket pressure plate, and the locking plate is in a relaxed state and is not affected by external forces, which is conducive to the long-term and stable use of the locking plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a schematic diagram of the internal locking structure of the high-voltage connector of the present invention; Figure 2 is a schematic diagram of the plug housing structure; Figure 3 It is a schematic diagram of the locking plate structure; Figure 4 It is a schematic diagram of the socket housing structure; Figure 5 This is a diagram of the locking piece and the plug housing in the first position before the stop position; Figure 6 This is a diagram showing the locking piece and the plug housing being in the stopped position after being in the first position; Figure 7 A schematic diagram of the plug housing and the socket housing in the initial state of being plugged into each other; Figure 8 It is a schematic diagram of the plug housing and the socket housing being inserted into place; Fig. 9 The locking plate is installed in place Figure 1 ; Fig.10 The locking plate is installed in place Figure 2 ; Fig.11 The locking plate is installed in place Figure 3 ; Fig.12 This is a transverse cross-sectional view after the locking plate is installed in place on the plug housing.

[0022] In the figure: 1, plug housing, 2, locking plate, 3, socket housing, 11, guide groove, 12, plug spring, 13, plug hanging platform, 14, arc-shaped boss, 15, front stop boss, 16, rear stop boss, 21, guide strip, 22, first cantilever, 23, second cantilever, 24, support platform, 25, arc-shaped groove, 26, front stop hanging platform, 27, locking plate pressure platform, 28, rear stop hanging platform, 31, hanging hole, 32, socket pressure platform. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Embodiment 1, as Figure 1 As shown, a high-voltage connector internal locking structure includes a plug housing 1 and a socket housing 3, the plug housing 1 and the socket housing 3 are plugged and connected, a locking piece 2 is connected to the plug housing 1, and the plug housing 1 and the locking piece 2 are both located on the inner side of the socket housing 3. After the connector is plugged, the socket housing 3 wraps the plug housing 1, and the socket housing 3 wraps the plug shrapnel 12 and the locking piece 2 on the plug housing 1 inside, at this time, the socket housing 3 forms a good external protection for the plug shrapnel 12 and the locking piece 2, and the risk of the plug shrapnel 12 and the locking piece 2 being damaged by bumps and external forces is relatively small, ensuring the safety of the connector structure; in addition, after the socket housing 3 wraps the plug housing 1 and the locking piece 2, the overall external structure of the connector is simple, and various protrusions will not appear, which is conducive to the integrated design and processing of the socket housing 3 of the connector and the device housing, simplifying the difficulty of integration.

[0025] Further, if Figure 2 , Figure 4As shown, a plug spring 12 is provided on the plug housing 1, a plug hanging platform 13 is provided on the outer side of the plug spring 12, a hanging hole 31 is provided on the side wall of the socket housing 3, and the plug hanging platform 13 cooperates with the hanging hole 31. Since the socket housing 2 wraps the plug housing 1, after the connectors are plugged in, the plug spring 12 on the plug housing 1 is also located on the inner side of the socket housing 3. When the connector is unlocked, the plug spring 12 is pressed downward, and the plug hanging platform 13 is unlocked from the hanging hole 31; the unlocking is performed by pressing downward, and the range of movement of the plug spring 12 is limited, and the outer wall of the plug housing 1 will limit the plug spring 12, so that the plug spring 12 will not be deformed too much, fail or break, and the stability of the use of the plug spring 12 is ensured.

[0026] Embodiment 2, based on embodiment 1, a high voltage connector internal locking structure, the locking piece 2 is slidably arranged on the plug housing 1, such as Figure 3 As shown, the locking plate 2 includes a first cantilever 22 and a second cantilever 23 arranged in the same direction, a front stop assembly is provided between the first cantilever 22 and the plug housing 1, and a rear stop assembly is provided between the second cantilever 23 and the plug housing 1; a pre-installed position unlocking assembly is provided between the first cantilever 22 and the socket housing 3. In this embodiment, the locking plate 2 includes two first cantilevers 22 and a second cantilever 23, and the two first cantilevers 22 are symmetrically arranged on both sides of the second cantilever 23; the locking plate 2 slides on the plug housing 1 to realize the switching of the pre-installed position and the fully assembled position of the locking plate 2, the front stop assembly limits the forward sliding of the locking plate 2, and the rear stop assembly limits the backward sliding of the locking plate 2, and the front stop assembly and the rear stop assembly work together to ensure that the locking plate 2 is in the pre-installed position on the plug housing 1; when the plug housing 1 and the socket housing 3 are inserted into the fully assembled position, the pre-installed position unlocking assembly unlocks the front stop assembly, so that the locking plate 2 can slide forward to the fully assembled position, thereby realizing the full assembly of the locking plate 2, and at this time, the locking plate 2 limits and locks the plug spring piece 12 of the plug housing 1.

[0027] In addition, during the movement of the locking plate 2, since the first cantilever 22 is symmetrically arranged on both sides of the second cantilever 23, the locking plate 2 is stably stressed on the plug housing 1, avoiding the locking plate 2 from being tilted and stressed, ensuring that the locking plate 2 slides smoothly on the plug housing 1.

[0028] Further, if Figure 5As shown, the front stop assembly includes a front stop boss 15 and a front stop hanging platform 26. The front stop boss 15 is arranged on the plug housing 1, and the front stop hanging platform 26 is arranged in the middle of the first cantilever 22. When the locking piece 2 is in the pre-installed position on the plug housing 1, the front stop boss 15 cooperates with the front of the front stop hanging platform 26. In this embodiment, the front stop hanging platform 26 is arranged on the upper side of the middle part of the first cantilever 22, the front stop boss 15 is arranged on both sides of the plug shrapnel 12, and a gap is provided between the front stop boss 15 and the plug shrapnel 12. The front stop boss 15 is a rectangular block. The front stop hanging platform 26 cooperates with the front stop boss 15 to prevent the locking piece 2 from sliding forward, limit the forward direction of the locking piece 2, and ensure that the locking piece 2 is stably installed in the pre-installed position on the plug housing 1.

[0029] Furthermore, the rear side of the front stop platform 26 is an inclined surface. During the unlocking process of the locking plate 2, the front stop boss 15 can press down the first cantilever 22 through the inclined surface, so that the front stop boss 15 passes over the front stop platform 26 to reach the front side of the front stop platform 26, and the locking plate 2 is unlocked to the pre-installed position. At this time, the plug housing 1 and the socket housing 3 can be unlocked.

[0030] Furthermore, the front of the front stop bracket 26 is a vertical surface. When the locking piece 2 is in the pre-installed position, the front stop boss 15 cooperates with the vertical surface, and when the first cantilever 22 is not subjected to external force, the front stop boss 15 cannot pass over the front stop bracket 26, and the position of the locking piece 2 on the plug housing 1 remains fixed, thereby ensuring the installation stability of the locking piece 2 in the pre-installed position on the plug housing 1.

[0031] Further, if Figure 6 As shown, the rear stop assembly includes a rear stop boss 16 and a rear stop hanging platform 28, the rear stop boss 16 is arranged on the plug housing 1, and the rear stop hanging platform 28 is arranged at the head of the second cantilever 23; when the locking plate 2 is in the pre-installed position on the plug housing 1, the front of the rear stop boss 16 and the back of the rear stop hanging platform 28 cooperate. In this embodiment, the rear stop hanger 28 is arranged on the lower side of the head of the second cantilever 23; the front of the rear stop boss 16 and the back of the rear stop hanger 28 are both vertical surfaces, and the back of the rear stop boss 16 and the front of the rear stop hanger 28 are both inclined surfaces. When the locking plate 2 is installed on the plug housing 1, the inclined surface of the rear stop boss 16 cooperates with the inclined surface of the rear stop hanger 28 to lift the second cantilever 23 upward, thereby making the rear stop hanger 28 pass over the rear stop boss 16. The front of the rear stop boss 16 and the back of the rear stop hanger 28 cooperate to prevent the locking plate 2 from sliding backward, limit the backward direction of the locking plate 2, and ensure that the locking plate 2 is stably installed in the pre-installed position on the plug housing 1.

[0032] Further, if Figure 7 , Figure 8As shown, the pre-installed unlocking assembly includes a locking plate pressing platform 27 and a socket pressing platform 32. The locking plate pressing platform 27 is arranged at the head of the first cantilever 22, and the socket pressing platform 32 is arranged on the inner wall of the socket housing 3. The locking plate pressing platform 27 and the socket pressing platform 32 are crimped and matched; Fig. 9 As shown, when the locking piece 2 is in the fully assembled position on the plug housing 1, the socket pressing platform 32 is located between the locking piece pressing platform 27 and the front stop hanging platform 26. In this embodiment, the front and rear sides of the plug pressing platform 32 and the locking piece pressing platform 27 are both inclined surfaces. After the plug housing 1 and the socket housing 3 are fully inserted into place, the socket pressing platform 32 presses down the locking piece pressing platform 27, so that the first cantilever 22 swings downward, thereby unlocking the front stop hanging platform 26 and the front stop boss 15, canceling the forward limit of the locking piece 2, and allowing the locking piece 2 to move forward.

[0033] In addition, after the socket pressing platform 32 passes over the locking plate pressing platform 27, the locking plate 2 is in a fully assembled position. At this time, the first cantilever 22 of the locking plate 2 is in a relaxed state and is not affected by external forces, which is conducive to the long-term and stable use of the connector.

[0034] Embodiment 3, based on embodiment 1, a high voltage connector inner locking structure, such as Fig.12 As shown, the plug housing 1 is provided with a guide groove 11, and the locking piece 2 is provided with a guide bar 21, and the guide groove 11 and the guide bar 21 are slidably matched. In this embodiment, the guide groove 11 is a transverse groove, and the guide bar 21 is arranged on the side of the first cantilever 22. When the locking piece 2 is connected to the plug housing 1, the locking piece 2 is located in the middle of the two guide grooves 11. The two guide grooves 11 limit the locking piece 2 in the left and right directions, and the guide groove 11 guides the moving direction of the locking piece 2 to ensure the moving stability of the locking piece 2 on the plug housing 1.

[0035] Further, if Fig.10 As shown, the plug housing 1 is provided with an arc-shaped boss 14 , which is located at the rear side of the front stop boss 15 , and the side edge of the first cantilever 22 is provided with an arc-shaped groove 25 , and the arc-shaped boss 14 cooperates with the arc-shaped groove 25 . In this embodiment, there are two arc-shaped bosses 14, and the two arc-shaped bosses 14 are symmetrically arranged. The arc-shaped boss 14 is arranged above the guide groove 11 to prevent the arc-shaped boss 14 from interfering with the sliding fit of the guide groove 11 and the guide strip 21; the arc-shaped boss 14 cooperates with the arc-shaped groove 25 to provide a damping force for the pushing of the locking plate 2, so that the staff can better judge whether the locking plate 2 is installed in place; specifically, before the locking plate 2 is fully installed in place, the arc-shaped boss 14 lifts and supports the first cantilever 22, and after the locking plate 2 is fully assembled in place, the arc-shaped boss 14 is stuck in the arc-shaped groove 25, which can remind the staff that the locking plate is installed in place; and the cooperation between the arc-shaped boss 14 and the arc-shaped groove 25 can prevent the locking plate from detaching from the fully assembled position, thereby ensuring the stability of the locking plate.

[0036] Further, if Fig.11 As shown, a support platform 24 is provided at the tail of the second cantilever 23. When the locking piece 2 is in a fully assembled position on the plug housing 1, the support platform 24 supports and cooperates with the end of the plug spring piece 12. The support platform 24 provides support for the end of the plug spring piece 12, so that the plug spring piece 12 cannot be pressed down, thereby achieving the locking of the connector.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-voltage connector internal locking structure, comprising a plug housing (1) and a socket housing (3), wherein the plug housing (1) and the socket housing (3) are plug-connected, and characterized in that: A locking plate (2) is connected to the plug housing (1), and the plug housing (1) and the locking plate (2) are both located inside the socket housing (3).

2. The internal locking structure of the high-voltage connector according to claim 1, characterized in that: A plug spring (12) is provided on the plug housing (1), a plug hanging platform (13) is provided on the outer side of the plug spring (12), a hanging hole (31) is provided on the side wall of the socket housing (3), and the plug hanging platform (13) cooperates with the hanging hole (31).

3. The internal locking structure of the high-voltage connector according to claim 1 or 2, characterized in that: A locking plate (2) is slidably arranged on the plug housing (1), the locking plate (2) comprising a first cantilever (22) and a second cantilever (23) arranged in the same direction, a front stop assembly is provided between the first cantilever (22) and the plug housing (1), a rear stop assembly is provided between the second cantilever (23) and the plug housing (1); and a pre-installed position unlocking assembly is provided between the first cantilever (22) and the socket housing (3).

4. The internal locking structure of the high-voltage connector according to claim 3, characterized in that: The front stop assembly comprises a front stop boss (15) and a front stop hanging platform (26); the front stop boss (15) is arranged on the plug housing (1), and the front stop hanging platform (26) is arranged in the middle of the first cantilever (22); when the locking plate (2) is in a pre-installed position on the plug housing (1), the front stop boss (15) cooperates with the front of the front stop hanging platform (26).

5. The internal locking structure of the high-voltage connector according to claim 4, characterized in that: The rear of the front stop hanging platform (26) is an inclined plane, and the front of the front stop hanging platform (26) is a vertical plane.

6. The internal locking structure of the high-voltage connector according to claim 3, characterized in that: The rear stop assembly comprises a rear stop boss (16) and a rear stop hanging platform (28); the rear stop boss (16) is arranged on the plug housing (1), and the rear stop hanging platform (28) is arranged at the head of the second cantilever (23); when the locking plate (2) is in a pre-installed position on the plug housing (1), the front of the rear stop boss (16) and the rear of the rear stop hanging platform (28) cooperate.

7. The high voltage connector inner locking structure according to any one of claims 4 to 6, characterized in that: The pre-installed position unlocking component comprises a locking plate pressing platform (27) and a socket pressing platform (32); the locking plate pressing platform (27) is arranged at the head of the first cantilever (22), and the socket pressing platform (32) is arranged on the inner wall of the socket housing (3); the locking plate pressing platform (27) and the socket pressing platform (32) are crimped together; when the locking plate (2) is in a fully assembled position on the plug housing (1), the socket pressing platform (32) is located between the locking plate pressing platform (27) and the front stop hanging platform (26).

8. The internal locking structure of the high-voltage connector according to claim 7, characterized in that: A guide groove (11) is provided on the plug housing (1), a guide strip (21) is provided on the locking plate (2), and the guide groove (11) and the guide strip (21) are slidably matched.

9. The high voltage connector inner locking structure according to any one of claims 4 to 6 and 8, characterized in that: An arc-shaped boss (14) is provided on the plug housing (1), the arc-shaped boss (14) is located at the rear side of the front stop boss (15), an arc-shaped groove (25) is provided on the side of the first cantilever (22), and the arc-shaped boss (14) cooperates with the arc-shaped groove (25).

10. The internal locking structure of the high voltage connector according to claim 9, characterized in that: A support platform (24) is provided at the rear of the second cantilever (23); when the locking plate (2) is in a fully assembled position on the plug housing (1), the support platform (24) is in support cooperation with the end of the plug spring plate (12).

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