CN115776017A - A rotating arm locking device and connector - Google Patents

Abstract

The invention relates to the technical field of connectors, in particular to a rotating arm locking device and a connector. The rotating arm locking device comprises a connector shell, a rotating arm is rotatably assembled on the connector shell, a sliding groove is formed in the connector shell, a locking piece is slidably assembled in the sliding groove and comprises a first elastic arm and a second elastic arm, an anti-falling convex part is arranged on the first elastic arm, and an anti-falling notch in sliding fit with the anti-falling convex part is formed in the side wall of the groove of the sliding groove; the rotary arm is provided with a jack for the first elastic arm to insert and a slot for the second elastic arm to insert, the opening of the slot faces downwards, the bottom wall of the slot is provided with a limit convex part, the front end of the second elastic arm is provided with a pressed part which is in press fit with the limit convex part and a limit hole for the limit convex part to enter, and the pressed part is positioned in front of the limit hole; the top of the front end of the sliding groove is provided with a blocking edge, the second elastic arm is provided with a blocking convex part matched with the blocking edge in a blocking way, and the blocking edge avoids the blocking convex part when the limiting convex part is in top pressing fit with the pressed part.

Description

A rotating arm locking device and connector

technical field

The invention relates to the technical field of connectors, in particular to a rotating arm locking device and a connector.

Background technique

At present, in the field of electric vehicle connectors, for connectors with large plugging force, it is required to design a rotating arm to assist docking, and to lock the rotating arm with a locking piece after docking to ensure that the connectors will not loosen, thereby ensuring The quality of the circuit connection. In the traditional technology, before the rotating arm is rotated to the locked position, the locking plate can also be pushed forward, and after the locking plate is pushed forward, the rotating arm cannot be locked, which will affect the connection efficiency of the connector.

The Chinese utility model patent with the authorized notification number CN215989360U discloses a handle locking device for a connector, which includes a connector housing, a handle (ie, a rotating arm) that is rotatably assembled on the connector housing, and a handle that is arranged on the connector housing. A locking piece (locking piece) for locking the handle is provided on the connector housing. The locking piece is slidably arranged in the chute, and the tail end of the locking piece is provided with a handle. The locking piece includes two elastic plates and a middle beam between the two elastic plates, the elastic plates are provided with locking hooks, and the groove side walls of the chute are provided with notches for the locking hooks to enter. When the handle is rotated to the locked position, the extrusion slope on the lower side of the boss on the handle squeezes the locking hook, so that the two elastic plates approach the middle beam, and then the locking hook leaves the gap, that is, when the handle does not turn to the lock When the locking piece is in the tight position, the locking piece cannot be pushed; after pushing the locking piece, the locking hook crosses the step structure of the chute and inserts into the locking groove of the handle to lock the handle. Among them, the lower surface of the top plate of the chute is provided with an anti-off block, and the center beam is provided with a limiting groove extending along the sliding direction of the locking piece. come out.

In the above-mentioned patent, when the elastic plate of the locking piece is damaged, not only the locking hook must be squeezed to approach the center beam, but also the center beam must be pressed to approach the groove bottom of the chute in order to release the limit of the chute to the locking piece. However, the space in the chute is relatively small, which is not conducive to pressing the center beam, and then is not conducive to taking out the locking piece from the chute.

Contents of the invention

The purpose of the present invention is to provide a rotating arm locking device to solve the problem in the prior art that the elastic plate of the locking piece is damaged, which is not conducive to the removal of the locking piece from the chute; the purpose of the present invention is also to provide a connectors to solve the above problems.

In order to achieve the above object, the technical solution of the rotating arm locking device of the present invention is:

The rotating arm locking device includes a connector housing on which a rotating arm is rotatably mounted, a chute is provided on the connector housing, and a locking piece for locking the rotating arm is slidably installed in the chute to The sliding direction of the locking piece is the front-to-back direction. The locking piece includes a first elastic arm and a second elastic arm extending along the front-to-back direction. The side of the first elastic arm facing away from the second elastic arm is provided with an anti-off protrusion. The groove side wall of the groove is provided with an anti-off notch slidingly matched with the anti-off protrusion along the front and rear direction; the rotating arm is provided with a socket for the first elastic arm to insert and a slot for the second elastic arm to insert, the slot The opening of the second elastic arm faces downward and the bottom wall of the groove is provided with a limiting protrusion. The pressure part is in front of the limit hole; the top of the front end of the chute is provided with a stop edge, and the second elastic arm is provided with a stop protrusion cooperating with the stop edge on the left and/or right side of the limit hole. When the position-limiting convex portion and the pressure-receiving portion press fit, the blocking edge avoids the blocking convex portion.

The beneficial effect is: the rotating arm locking device in the present invention utilizes the anti-off protrusion on the first elastic arm to slide and cooperate with the anti-off notch on the groove side wall of the chute, so as to realize the anti-off of the locking member, and by pressing The anti-dropping protrusion deforms the first elastic arm to the second elastic arm, so that the locking part can be pulled out from the chute, making it more convenient to take out the locking part from the chute. Moreover, through the blocking cooperation between the blocking protrusion and the blocking edge, the locking member cannot be pushed forward when the rotating arm is not rotated to the locking position, thereby avoiding misoperation during the assembly process of the connector. In addition, when the position-limiting protrusion and the pressure-receiving part are press-fitted, the blocking edge avoids the blocking protrusion, and the locking member is pushed forward so that the first elastic arm can be inserted into the socket, and the second elastic arm can be inserted into the slot. At the same time, the limiting protrusion in the slot can enter into the limiting hole of the second elastic arm, so as to realize the locking of the rotating arm.

As a further improvement, the rear side of the limiting protrusion is located behind the hole edge of the insertion hole, and the front end of the chute is provided with an escape groove for avoiding the limiting protrusion.

The beneficial effect is that such a design is beneficial to ensure that the first elastic arm and the second elastic arm are equal in length, thereby ensuring the insertion depth of the first elastic arm into the socket, and improving the stability of the rotating arm when it is locked.

As a further improvement, the escape groove is a trapezoidal groove or a V-shaped groove.

As a further improvement, there are two first elastic arms, and the second elastic arm is located between the two first elastic arms.

The beneficial effect is that: the two first elastic arms not only ensure uniform stress, but also ensure the stability of the rotating arm after locking.

As a further improvement, the groove bottom of the chute is provided with supporting ribs extending in the front-rear direction, and there are two supporting ribs which respectively support and cooperate with the corresponding first elastic arms.

The beneficial effect is: compared with processing the escape groove at the groove bottom of the chute below the second elastic arm, this design can ensure the strength of the position where the chute is located.

As a further improvement, the front side of the anti-loosening protrusion is a slope, and the rear side of the anti-loosening protrusion is a straight face.

Beneficial effect is: such design, the two first elastic arms are deformed toward the second elastic arm through the guidance of the inclined plane, which is beneficial for the locking piece to be inserted into the chute; Easy to come out from the chute.

As a further improvement, when the blocking edge is engaged with the blocking protrusion, the rear side of the anti-off protrusion is arranged in close contact with the rear wall of the anti-off notch.

The beneficial effect is that the design ensures that the locking member is fixed in the sliding groove before the rotating arm is rotated to the locking position.

As a further improvement, the front side of the limiting protrusion and the rear side of the blocking protrusion are sloped.

The beneficial effect is that such a design is beneficial to pulling the locking part backward to realize the unlocking of the rotating arm.

As a further improvement, the connector housing includes a housing body and a tail cover. A transmission plate is slidably mounted on the housing body along the front and rear directions. A gear is provided on the rotation arm of the rotating arm locking device, and a gear is provided on the transmission plate. Engaging racks and key slots that fit into the lugs on the corresponding connector.

In order to achieve the above object, the technical solution of the connector of the present invention is:

The connector includes a rotating arm locking device. The rotating arm locking device includes a connector housing. Contacts are installed in the connector housing. A rotating arm is rotated on the connector housing. A chute is provided on the connector housing. A locking piece for locking the rotating arm is slidably installed in the chute, and the sliding direction of the locking piece is the front and rear direction. The locking piece includes a first elastic arm and a second elastic arm extending in the front and rear direction. The first elastic arm The side facing away from the second elastic arm is provided with an anti-off protrusion, and the groove side wall of the chute is provided with an anti-off notch that slides and cooperates with the anti-off protrusion along the front and rear directions; The socket for insertion and the slot for inserting the second elastic arm, the opening of the slot is facing downward and the bottom wall of the slot is provided with a limiting protrusion, and the front end of the second elastic arm is provided with a top pressure fit with the limiting protrusion. The pressure receiving part and the limit hole for the limit protrusion to enter, the pressure part is in front of the limit hole; the top of the front end of the chute is provided with a retaining edge, and the second elastic arm is on the left side of the limit hole and/or Or the right side is provided with the stop protrusion that cooperates with the stop edge, and when the limit protrusion is press-fitted with the pressed part, the stop edge avoids the stop protrusion.

The beneficial effect is: the rotating arm locking device in the present invention utilizes the anti-off protrusion on the first elastic arm to slide and cooperate with the anti-off notch on the groove side wall of the chute, so as to realize the anti-off of the locking member, and by pressing The anti-detachment protrusion deforms the first elastic arm to the second elastic arm, so that the locking part can be pulled out from the chute, so that it is more convenient to take out the locking part from the chute. Moreover, through the blocking cooperation between the blocking protrusion and the blocking edge, the locking member cannot be pushed forward when the rotating arm is not rotated to the locking position, thereby avoiding misoperation during the assembly process of the connector. In addition, when the position-limiting protrusion and the pressure-receiving part are press-fitted, the blocking edge avoids the blocking protrusion, and the locking member is pushed forward so that the first elastic arm can be inserted into the socket, and the second elastic arm can be inserted into the slot. At the same time, the limiting protrusion in the slot can enter into the limiting hole of the second elastic arm, so as to realize the locking of the rotating arm.

As a further improvement, the rear side of the limiting protrusion is located behind the hole edge of the insertion hole, and the front end of the chute is provided with an escape groove for avoiding the limiting protrusion.

The beneficial effect is that such a design is beneficial to ensure that the first elastic arm and the second elastic arm are equal in length, thereby ensuring the insertion depth of the first elastic arm into the socket, and improving the stability of the rotating arm when it is locked.

As a further improvement, the escape groove is a trapezoidal groove or a V-shaped groove.

As a further improvement, there are two first elastic arms, and the second elastic arm is located between the two first elastic arms.

The beneficial effect is that: the two first elastic arms not only ensure uniform stress, but also ensure the stability of the rotating arm after locking.

As a further improvement, the groove bottom of the chute is provided with supporting ribs extending in the front-rear direction, and there are two supporting ribs which respectively support and cooperate with the corresponding first elastic arms.

The beneficial effect is: compared with processing the escape groove at the groove bottom of the chute below the second elastic arm, this design can ensure the strength of the position where the chute is located.

As a further improvement, the front side of the anti-loosening protrusion is a slope, and the rear side of the anti-loosening protrusion is a straight face.

Beneficial effect is: such design, the two first elastic arms are deformed toward the second elastic arm through the guidance of the inclined plane, which is beneficial for the locking piece to be inserted into the chute; Easy to come out from the chute.

As a further improvement, when the blocking edge is engaged with the blocking protrusion, the rear side of the anti-off protrusion is arranged in close contact with the rear wall of the anti-off notch.

The beneficial effect is that the design ensures that the locking member is fixed in the sliding groove before the rotating arm is rotated to the locking position.

As a further improvement, the front side of the limiting protrusion and the rear side of the blocking protrusion are sloped.

The beneficial effect is that such a design is beneficial to pulling the locking part backward to realize the unlocking of the rotating arm.

As a further improvement, the connector housing includes a housing body and a tail cover. A transmission plate is slidably mounted on the housing body along the front and rear directions. A gear is provided on the rotation arm of the rotating arm locking device, and a gear is provided on the transmission plate. Engaging racks and key slots that fit into the lugs on the corresponding connector.

Description of drawings

Fig. 1 is the structural representation of connector of the present invention;

Fig. 2 is a schematic structural view of Fig. 1 after removing the shell body;

Fig. 3 is a structural schematic diagram of the locking member in an unlocked state after removing the rotating arm in Fig. 1;

Fig. 4 is a schematic diagram of the structure of the locking member in the locked state after removing the rotating arm in Fig. 1;

Fig. 5 is a schematic structural diagram of Fig. 4 after removing the locking member;

Fig. 6 is a schematic structural view of the rotating arm in Fig. 1;

Fig. 7 is a schematic structural view of the locking member in Fig. 1;

Fig. 8 is a cross-sectional view of the locking member in Fig. 1 in an unlocked state;

Fig. 9 is a sectional view of A-A direction in Fig. 8;

Fig. 10 is a schematic structural view of the locking member in Fig. 1 in a locked state;

Fig. 11 is a cross-sectional view along B-B in Fig. 10 .

In the figure: 11, shell body; 12, tail cover; 13, rotating arm; 14, anti-off protrusion; 15, anti-off gap; 16, locking piece; 17, chute; 18, transmission plate; 19, teeth Bar; 20, lock groove; 21, gear; 22, avoidance groove; 23, perforation; 24, support rib; 25, jack; 26, slot; , the second elastic arm; 30, the limit hole; 31, the blocking convex portion; 32, the pressure receiving portion; 33, the blocking edge.

Detailed ways

In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the present invention, that is, the described embodiments are only some of the embodiments of the present invention, but not all of the embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that possible terms such as "first" and "second" and other relative terms are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these There is no actual relationship or order between entities or operations. Furthermore, terms such as "comprises," "comprising," or any other variation thereof are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that includes a set of elements includes not only those elements, but also includes elements not expressly listed. Other elements mentioned above, or also include elements inherent in such process, method, article or equipment. Without further limitations, an element defined by the phrase "comprising a" etc. does not preclude the presence of additional same elements in the process, method, article or apparatus comprising said element. In addition, the terms "front", "rear", "upper", "lower", "left", and "right" are based on the orientations and positional relationships shown in the drawings, and are only for the convenience of describing the present invention, rather than indicating Refers to devices or components that must have a specific orientation and therefore should not be construed as limiting the invention.

The characteristics and performance of the present invention will be described in further detail below in conjunction with the examples.

Embodiment 1 of the connector of the present invention:

As shown in Figures 1 and 2, the connector includes a rotating arm locking device. The rotating arm locking device includes a shell body 11, a tail cover 12, and a rotating arm 13 that is rotatably assembled on the tail cover 12. Inside the shell body 11 is installed The contact piece, the housing body 11 and the tail cover 12 together constitute the connector housing.

In this embodiment, the tail cover 12 is provided with a chute 17 , and a locking member 16 for locking the rotating arm 13 is slidably mounted in the chute 17 . Taking the sliding direction of the locking member 16 on the tail cover 12 as the front-to-back direction, a transmission plate 18 is slidably mounted on the shell body 11 along the front-to-back direction, the bottom of the rotating arm 13 is provided with a gear 21, and the top of the transmission plate 18 is provided with a gear 21 is engaged with the rack 19. During the rotation of the rotating arm 13, the transmission plate 18 slides forward and backward through the engagement of the gear 21 and the rack 19. The drive plate 18 is provided with a locking groove 20 for the protruding post on the corresponding connector to enter. When the drive plate 18 moves from back to front, the protruding post on the corresponding connector gradually moves toward the locking groove 20 relative to the drive plate 18. The rear part of the connector is moved so that the connector and the corresponding connector are close to each other and mated.

As shown in Fig. 3, Fig. 4, Fig. 5 and Fig. 7, the locking member 16 includes a first elastic arm 28 and a second elastic arm 29 extending along the front and rear directions, the first elastic arm 28 is provided with two, and the second elastic arm 28 is provided with two elastic arms. The arm 29 is between the two first elastic arms 28 .

In this embodiment, the side of the first elastic arm 28 facing away from the second elastic arm 29 is provided with an anti-off protrusion 14, and the groove side wall of the chute 17 is provided with an anti-off notch 15, and the anti-off protrusion 14 is connected with the anti-off protrusion. The notch 15 is slidably fitted along the front-to-back direction. Wherein, the front side of the anti-off convex portion 14 is an inclined plane, and the rear side of the anti-off convex portion 14 is a straight surface. This design makes the two first elastic arms 28 deform to the second elastic arm 29 through the guidance of the inclined plane, which is conducive to locking Part 16 is inserted in the chute 17; by cooperating with the rear wall of the anti-off notch 15, the locking part 16 is not easy to escape from the chute 17, only by pressing the anti-off protrusion 14, the first elastic arm 28 Only by deforming toward the second elastic arm 29 can the locking member 16 be pulled out from the slide groove 17 .

As shown in Figures 5 to 7, the rotating arm 13 is provided with a jack 25 for inserting the first elastic arm 28 and a slot 26 for inserting the second elastic arm 29, the jack 25 is provided with two slots 26 It is between the two sockets; the opening of the slot 26 faces downward, and the bottom wall of the slot 26 is provided with a limiting protrusion 27 .

In this embodiment, the front end of the second elastic arm 29 is provided with a pressure receiving portion 32 for press-fitting with the limiting protrusion 27 and a limiting hole 30 for the limiting convex portion 27 to enter, and the pressing portion 32 is in a position limiting position. The front of the hole 30; the top of the front end of the chute 17 is provided with a stop edge 33, and the second elastic arm 29 is provided with a stop protrusion 31 on the left side and the right side of the limit hole 30 to block and cooperate with the stop edge 33. When the position-limiting protrusion 27 is press-fitted with the pressure-receiving part 32, the front end of the second elastic arm 29 is elastically deformed and moves downward, so that the stop edge 33 avoids the stop protrusion 31; and then pushes forward to lock 16, so that the limiting protrusion 27 enters into the limiting hole 30, and at the same time, the first elastic arm 28 is inserted into the socket 25, and the second elastic arm 29 is inserted into the slot 26, so as to realize the locking of the rotating arm 13.

In this embodiment, when the blocking edge 33 is engaged with the blocking convex portion 31, the back side of the anti-off protrusion 14 is closely arranged with the rear wall of the anti-off notch 15, so that the locking member 16 is in the chute 17 fixed; and when the position-limiting protrusion 27 enters the position-limiting hole 30 , the front side of the anti-disengagement protrusion 14 and the front wall of the anti-disengagement notch 15 are closely arranged.

In this embodiment, the front side of the limiting protrusion 27 and the rear side of the blocking protrusion 31 are both inclined surfaces. This design is beneficial to pull the locking member 16 backward to realize the unlocking of the rotating arm 13 .

As shown in FIG. 5 and FIG. 7 , the bottom of the chute 17 is provided with supporting ribs 24 extending in the front-rear direction, and there are two supporting ribs 24 which are respectively supported and matched with corresponding first elastic arms 28 . This design can make the second elastic arm 29 suspended in the air, which is beneficial for the elastic deformation of the front end of the second elastic arm 29 to move downward.

As shown in Figures 5 and 6, the rear side of the limiting protrusion 27 is located behind the hole edge of the jack 25, that is, the limiting protrusion 27 is arranged behind the jack 25, and the front end of the chute 17 is provided with a As for the avoidance groove 22 of the avoidance limit protrusion 27, preferably, the escape groove 22 is an isosceles trapezoidal groove. This design is beneficial to ensure that the first elastic arm 28 and the second elastic arm 29 are equal in length, thereby ensuring the insertion depth of the first elastic arm 28 into the insertion hole 25 and improving the stability of the rotating arm 13 when locked. In other embodiments, the avoidance groove may be a right-angled trapezoidal groove or a V-shaped groove.

Before the connector is mated with the corresponding connector, part of the transmission plate 18 is exposed outside the shell body 11 . During the insertion process, turn the rotating arm 13 to drive the transmission plate 18 to move forward, and use the lock groove 20 on the transmission plate 18 to pull the protrusion on the corresponding connector, so that the connector and the corresponding connector are close to each other to complete the insertion .

As shown in Figures 8 and 9, when the rotating arm 13 is rotated to the locked position, the limiting convex portion 27 on it presses the pressure receiving portion 32, so that the front end of the second elastic arm 29 is elastically deformed and moves downward. When the block edge 33 avoids the stop convex portion 31; after that, push the locking piece 16 to move forward, as shown in Figure 10 and Figure 11, the stop convex portion 31 crosses the block edge 33, and the limiting convex portion 27 enters the limit At the same time, the first elastic arm 28 is inserted into the insertion hole 25 through the through hole 23 , and the second elastic arm 29 is inserted into the slot 26 to realize the locking of the rotating arm 13 .

When the rotating arm 13 needs to be unlocked, just pull the locking member 16 backward. Since the front side of the position-limiting protrusion 27 and the rear side of the stop protrusion 31 are sloped surfaces, the front side of the position-limiting protrusion 27 and the hole of the position-limiting hole 30 are press-fitted along the rear side of the stop protrusion 31. The side faces are press-fitted with the retaining edge 33, so that the locking member 16 can be pulled back relatively easily.

Embodiment 2 of the connector of the present invention:

The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the position-limiting protrusion is at a rear position compared to the insertion hole, and the front end of the chute is provided with an avoidance groove for avoiding the position-limiting protrusion. In this embodiment, no escape groove is provided at the front end of the chute, and the limiting protrusion is flush with the socket. At this time, the second elastic arm is longer than the first elastic arm, and the second elastic arm is longer than the first elastic arm when the stop edge and the stop protrusion are limitedly matched. The pressure receiving parts of the two elastic arms are exposed outside the chute.

Embodiment 3 of the connector of the present invention:

The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the bottom of the chute is provided with supporting ribs extending in the front and rear directions, and there are two supporting ribs which respectively cooperate with corresponding first elastic arms. In this embodiment, no supporting ribs are provided at the bottom of the chute, but an avoidance groove is provided under the second elastic arm. At this time, the tail cover should be thickened at the avoidance groove to ensure the strength of this position.

Embodiment 4 of the connector of the present invention:

The difference between this embodiment and embodiment 1 is that in embodiment 1, there are two first elastic arms, and the second elastic arm is located between the two first elastic arms. In this embodiment, one first elastic arm is provided, and at this time, the side of the second elastic arm facing away from the first elastic arm is arranged close to the groove side wall of the slide groove.

Embodiment 5 of the connector of the present invention:

The difference between this embodiment and embodiment 1 is that in embodiment 1, the front side of the anti-falling protrusion is an inclined surface, and the rear side of the anti-falling protrusion is a straight face. In this embodiment, the front side and the back side of the anti-falling protrusion are both straight faces. In other embodiments, both the front side and the rear side of the anti-falling protrusion are sloped, and the front side and the rear side are arranged in parallel.

Embodiment 6 of the connector of the present invention:

The difference between this embodiment and embodiment 1 is that, in embodiment 1, when the blocking edge and the blocking convex portion stop and cooperate, the rear side of the anti-off protrusion is arranged in close contact with the rear wall of the anti-escape notch. In this embodiment, when the blocking edge and the blocking convex part are blocked and matched, the gap between the rear side of the anti-off protrusion and the rear wall of the anti-off notch is arranged. At this time, the locking member can have a certain amount of movement in the chute. But it will not come out of the chute.

The embodiment of the rotating arm locking device of the present invention has the same structure as the rotating arm locking device described in any one of Embodiments 1 to 6 of the above-mentioned connector, and will not be repeated here.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. The scope of patent protection of the present invention is subject to the claims. Any equivalent structural changes made by using the description and accompanying drawings of the present invention, All should be included in the protection scope of the present invention in the same way.

Claims (10)

1. Rotating arm locking device, including the connector housing, it is equipped with rotating arm (13) to rotate on the connector housing, be equipped with spout (17) on the connector housing, spout (17) are interior to slide and are equipped with locking piece (16) that are used for locking rotating arm (13), a serial communication port, the slip direction that uses locking piece (16) is the fore-and-aft direction, locking piece (16) are including first elastic arm (28) and second elastic arm (29) along the fore-and-aft direction extension, one side that first elastic arm (28) dorsad second elastic arm (29) is equipped with anticreep convex part (14), be equipped with anticreep breach (15) along fore-and-aft direction and anticreep convex part (14) sliding fit on the groove lateral wall of spout (17); the rotary arm (13) is provided with a jack (25) for inserting the first elastic arm (28) and a slot (26) for inserting the second elastic arm (29), the opening of the slot (26) faces downwards, the bottom wall of the slot is provided with a limit convex part (27), the front end of the second elastic arm (29) is provided with a pressed part (32) which is in press fit with the limit convex part (27) and a limit hole (30) for the limit convex part (27) to enter, and the pressed part (32) is positioned in front of the limit hole (30); the top of the front end of the sliding groove (17) is provided with a blocking edge (33), the left side and/or the right side of the limiting hole (30) on the second elastic arm (29) is provided with a stopping convex part (31) in blocking fit with the blocking edge (33), and the blocking edge (33) avoids the stopping convex part (31) when the limiting convex part (27) is in pressing fit with the pressed part (32).

2. Rotating arm locking device according to claim 1, characterized in that the rear side of the limit projection (27) is located behind the hole edge of the insertion hole (25), and the front end of the sliding slot (17) is provided with an escape groove (22) for escaping the limit projection (27).

3. Swivel arm locking device according to claim 2, characterized in that the avoiding groove (22) is a trapezoidal or V-shaped groove.

4. Swivel arm locking arrangement according to claim 1 or 2 or 3, characterized in that the first resilient arm (28) is provided in two and the second resilient arm (29) is located between the two first resilient arms (28).

5. A rotary arm locking device according to claim 4 characterized in that the bottom of the chute (17) is provided with support ribs (24) extending in a front-to-rear direction, the support ribs (24) being provided in two and in supporting engagement with the respective first resilient arms (28).

6. Rotary arm locking device according to claim 1 or 2 or 3, characterized in that the front side of the anti-release protrusion (14) is a sloping surface and the back side of the anti-release protrusion (14) is a straight surface.

7. Locking device for a rotary arm according to claim 1, 2 or 3, characterized in that the rear side of the anti-release protrusion (14) is arranged in close contact with the rear wall of the anti-release recess (15) when the blocking edge (33) is in blocking engagement with the blocking protrusion (31).

8. Swivel arm locking arrangement according to claim 1 or 2 or 3, characterized in that the front side of the stop protrusion (27) and the rear side of the stop protrusion (31) are both bevelled.

9. A locking device for a rotating arm according to claim 1, 2 or 3, characterized in that the connector housing comprises a housing body (11) and a tail cap (12), a driving plate (18) is slidably mounted on the housing body (11) in the front-back direction, a gear (21) is arranged on the rotating arm (13), and a rack (19) engaged with the gear (21) and a locking slot (20) for a boss on the corresponding connector to enter are arranged on the driving plate (18).

10. Connector comprising a swivel arm locking device, characterized in that the swivel arm locking device is a swivel arm locking device according to any of claims 1 to 9, a contact member being mounted in a connector housing of the swivel arm locking device.

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