CN219350766U - Adapter of track type socket - Google Patents

Abstract

The utility model relates to the technical field of sockets, in particular to an adapter of a track type socket. The adapter further comprises two pinions (2) arranged on the base (1), two conductive pins (3) and a main gear (5) arranged on the rotating ring (4). Before the adapter is installed on track board (9), can make the conductive insert piece (32) of two conductive pins 3 be located in two open slots (111) of base (1) respectively through rotating swivel ring (4), after picture peg (11) of base (1) stretches into the spout of track board (9), through rotating swivel ring (4), can make the conductive insert piece (32) of two conductive pins (3) outwards stretch out by two open slots (111) respectively, and conductive insert piece (32) are pegged graft with conductive insert sleeve (911) on left side wall and the right side wall in track board (9), this adapter has the advantage of being convenient for install and use.

Description

Adapter of track type socket

Technical Field

The utility model relates to the technical field of sockets, in particular to an adapter of a track type socket.

Background

The track type socket comprises a track plate and a plurality of adapters which are arranged on the track plate in a sliding manner, wherein the track plate is provided with a conductive plug bush which is electrically connected with a power supply line, and the adapters are provided with conductive plug sheets and jacks. When the track-type receptacle is in use, the conductive tabs of the adapter are inserted into and in electrical contact with the conductive sockets of the track plate. Thus, when the plug of the electric appliance is plugged into the jack of the adapter, the electric appliance can take electricity from the adapter.

The structure of the disassembly and assembly connection and the electrical connection of the adapter and the track plate is a technical key point of various track type socket products.

Disclosure of Invention

In view of the above, the present utility model provides an adapter of a track-type socket for facilitating the installation of the adapter in the track-type socket.

In an adapter of a rail-type socket provided in this embodiment, the adapter includes a base, and two pinions, two conductive pins, a rotary ring, and a main gear provided on the base.

The periphery of the top surface of the base is provided with an annular side wall, the bottom of the base is provided with an inserting plate which extends out, two open grooves are formed in the inserting plate at intervals along the length direction of the bottom surface of the base, and the two open grooves are respectively located on two opposite sides of the inserting plate. The two pinion gears are both rotatably connected to the base and respectively correspond to one of the open grooves. Each conductive pin comprises a conductive rod and a conductive inserting piece extending from the side wall of the conductive rod; a conductive rod is coaxially connected with one of the pinion gears, and the conductive insert is positioned in the open slot. The lower portion of the swivel ring extends into the annular sidewall to be rotatably disposed on the base. The main gear is coaxially connected to the rotating ring and is meshed with the two auxiliary gears, so that the conductive inserting pieces of the two conductive pins rotate around the conductive rods to extend out of the corresponding open grooves through rotation of the rotating ring.

In order to make it easier for the skilled person to understand the structure of the above-described adapter, this is described here by way of example in connection with a track plate. For example, an installation space is formed in the track plate, a conductive plug bush is arranged on the left side wall and the right side wall of the installation space, and a limit opening for the limit plate of the adapter to extend into and slide is formed in the top wall of the installation space. According to the scheme, before the adapter is mounted on the track plate, the rotary ring is rotated to enable the conductive inserting pieces of the two conductive pins to be located in the two open grooves of the base respectively, after the inserting plate of the base stretches into the sliding grooves of the track plate, the rotary ring is rotated to enable the conductive inserting pieces of the two conductive pins to extend outwards from the two open grooves respectively, and the two conductive inserting pieces are inserted into the conductive inserting sleeves on the left side wall and the right side wall in the track plate, so that after the adapter is mounted on the track plate, the electrical connection with the track plate is completed simultaneously. The adapter has the advantage of being convenient to install and use.

In a preferred embodiment of the adapter provided by the above embodiment, the diameter of the main gear may be larger than the diameter of the pinion, so that the rotating ring may meet the requirement of the rotation angle range of the conductive insert by rotating by a smaller rotation angle.

In a preferred embodiment of the adapter provided in the foregoing embodiment, the rotating ring is further provided with at least one connecting arm, one end of which is connected to an inner wall of the rotating ring, and the other end of which extends to be connected to a top surface or a bottom surface of the main gear. Thereby coaxially connecting the main gear to the rotating ring. In the implementation, two connecting arms positioned on the same straight line may be provided on the rotating ring according to the need, or three connecting arms with the same included angle may be provided on the rotating ring. In addition, a fixing frame can be formed on the rotating ring, and the main gear is further detachably and coaxially arranged on the fixing frame, for example, a through hole is formed on the fixing frame, and a rotating shaft on one side of the main gear is connected with the through hole through a flat key.

In a preferred implementation manner of the adapter provided in the foregoing embodiment, when the other end of one connecting arm extends to connect with the bottom surface of the main gear, two limiting ribs may be further disposed on the top surface of the base, and the two limiting ribs are disposed at a set angle with an axis of the main gear as a center at intervals; the two limit ribs are in limit fit with one of the connecting arms so as to limit the rotation range of the rotary ring to be matched with the rotation range required by the conductive inserting sheet. Meanwhile, the problem that the conductive pins and other parts in the adapter are damaged due to the fact that the rotating angle is too large due to misoperation of the rotating ring can be avoided.

It should be noted that, in addition to the above-described engagement by the stopper rib and the connecting arm, the embodiment in which the rotation range of the rotary ring is limited to match the rotation range required for the conductive tab is not limited thereto.

For example, in an alternative embodiment, the base extends away from its top surface by at least one lever, and a latch is provided on the lever on the side facing the annular sidewall; the lower part of the rotating ring is provided with an arc-shaped groove into which the clamping block extends, and the clamping block is matched with the arc-shaped groove to limit the rotating range of the rotating ring to be matched with the rotating range required by the conductive inserting piece.

In a preferred embodiment of the adapter provided by the above embodiment, the main gear is provided with an annular groove coaxial therewith, and the adapter further comprises a torsion spring coaxially disposed in the annular groove, and having one end connected to the main gear and the other end fixedly disposed with respect to the base.

The annular groove may face toward the base or may face away from the base. For example, the annular groove may be oriented toward the base, with one end of the torsion spring being connected to the main gear and the other end being directly connected to the base.

In another alternative embodiment, in an embodiment wherein the annular groove faces away from the base, the adapter further comprises: a mounting bracket including a mounting plate and a plurality of legs disposed on one side of the mounting plate; the mounting plate is arranged above the main gear and connected with one end of the torsion spring, and the plurality of supporting legs are connected to the base.

In a preferred implementation manner of the adapter provided by the foregoing embodiment, the lower ends of the plurality of legs are provided with sockets, and the top surface of the base is provided with a plurality of limiting strips and inserting blocks extending from the inner sides of the limiting strips, the limiting strips limit the outer parts of the legs, and the inserting blocks are inserted into the sockets so as to limit the movement of the mounting frame in a direction parallel to the base. The adapter further comprises: and the top cover is used for pressing the mounting frame between the top cover and the base, and is connected to the base. For example, the connecting claw can be connected with the top cover by penetrating the base through a plurality of screws, and a plurality of connecting claws can be arranged on the bottom surface of the top cover and clamped on the top surface of the base.

Further, in a two-hole receptacle embodiment, at least two electrical connectors of the adapter may be provided on the top surface of the mounting bracket and for electrical connection with an external plug. Wherein, each conducting rod is also connected with an electric connector respectively.

Preferably, in the three-hole socket embodiment, a conductive plug bush is further disposed on the bottom wall of the installation space. Correspondingly, the adapter further comprises a grounding inserting piece and an electric connecting piece connected with the grounding inserting piece, the grounding inserting piece can penetrate through the mounting frame and the main gear to extend out of the bottom surface of the inserting plate of the base, and the grounding inserting piece is connected with the conductive inserting sleeve arranged on the bottom wall of the mounting space in an inserting mode.

In a preferred embodiment of the adapter provided in the foregoing embodiment, a rotation shaft is formed at a lower end of the pinion gear, and a shaft hole adapted to the rotation shaft is formed in the base so that the pinion gear is rotatably disposed on the base. The rotary ring is also provided with a compression ring which is coaxially connected to the inner side of the rotary ring, and the compression ring is positioned above the two pinion gears and limits the two pinion gears in the axial direction.

In a preferred implementation manner of the adapter provided in the foregoing embodiment, the pinion may be connected to the conductive pin by injection molding, and a protective sleeve is further formed at a lower end of the pinion, and the protective sleeve covers a portion of the conductive rod and a portion of the conductive insert of the conductive pin. Therefore, the insulation protection effect can be achieved on the part of the conductive pin which does not need to be conductive. Preferably, the conducting rod is flat and is further provided with a buckle, and the buckle is in clamping connection with the inner wall of the pinion. In this way, the connection between the conductive pin and the main gear can be made more firm.

Drawings

The above and other features and advantages of the present utility model will become more apparent to those of ordinary skill in the art by describing in detail preferred embodiments thereof with reference to the attached drawings in which:

fig. 1 is an external schematic view of an adapter of a track-type socket of the present embodiment.

Fig. 2 is a schematic diagram of a transmission structure of an adapter of a track type socket of the present embodiment.

Fig. 3 is an exploded view of the adaptor of the track-type socket of the present embodiment.

Wherein, the reference numerals are as follows:

1-a base; 101-annular side walls; 11-inserting plates; 111-open slots; 12-limiting ribs; 13-a gear lever; 131-clamping blocks; 14-limiting strips; 141-plug blocks; 15-shaft holes;

2-pinion gears; 21-a rotating shaft; 22-protecting sleeve;

3-conductive pins; 31-conducting rods; 32-conductive insert sheets; 33-ground blade; 34-electrical connectors;

4-a rotating ring; 41-a connecting arm; 42-arc-shaped grooves; 43-a compression ring;

5-a main gear; 51-an annular groove;

6-torsion springs;

7-mounting frames; 71-supporting legs; 711-socket; 72-mounting plates;

8-top cover;

9-track plate; 91-installation space; 911-conductive inserts; 92-limit opening.

Detailed Description

The present utility model will be further described in detail with reference to the following examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent.

In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

As can be seen in fig. 1, the adapter of the present embodiment comprises a base 1, a swivel ring 4 and a top cover 8. The top surface of the base 1 is formed with an annular sidewall 101, a bottom portion of the sidewall extends from a plugboard 11, two open slots 111 are spaced apart from each other along a length direction of the bottom surface of the base 1, and the two open slots 111 are located on two opposite sides of the plugboard 11. The lower portion of the rotating ring 4 protrudes into the annular side wall 101 to be rotatably provided on the base 1. The top cover 8 is provided with a plurality of jacks which can be connected with a plug, the top cover 8 is connected to the base 1, and the top cover 8 can limit the rotating ring 4 in the axial direction. For example, the base 1 and the top cover 8 may be connected by a plurality of screws, or a plurality of connection claws may be provided on the bottom surface of the top cover 8, and the connection claws may be clamped to the top surface of the base 1.

As can be seen in connection with fig. 1 to 3, the adapter further comprises two pinions 2 arranged on the base 1, two conductive pins 3 and a main gear 5 arranged on the swivel ring 4.

Both the pinions 2 are rotatably connected to the base 1 and correspond to one of the open grooves 111, respectively. In an alternative embodiment, referring to fig. 3, a rotation shaft 21 is formed at a lower end of the pinion 2, and a shaft hole 15 adapted to the rotation shaft 21 is formed on the base 1 so that the pinion 2 is rotatably disposed on the base 1. As can be seen from fig. 2, the rotary ring 4 may also be provided with a pressure ring 43 coaxially connected to the inner side of the rotary ring 4, the pressure ring 43 being located above the two pinions 2 and limiting the two pinions 2 in the axial direction.

In the adapter according to the present embodiment, the manner in which the pinion 2 is rotatably provided on the base 1 is not limited to the manner described above. For example, two bearings may be provided on the base 1, and the two pinions 2 may be connected to one bearing.

Referring to fig. 2 and 3, the main gear 5 is coaxially connected to the rotary ring 4. In a preferred embodiment, the rotating ring 4 is further provided with at least one connection arm 41, one end of the connection arm 41 being connected to the inner wall of the rotating ring 4 and the other end extending to be connected to the top or bottom surface of the main gear 5, thereby coaxially connecting the main gear 5 to the rotating ring 4.

In the embodiment, two connecting arms 41 positioned on the same straight line may be provided on the rotating ring 4, or three connecting arms 41 having the same angle may be provided on the rotating ring 4, or other embodiments in which a plurality of connecting arms 41 are provided may be used. In addition, a fixing frame may be formed on the rotating ring 4, and the main gear 5 may be further detachably and coaxially disposed on the fixing frame, for example, a through hole is formed on the fixing frame, and the rotating shaft 21 on one side of the main gear 5 is connected with the through hole through a flat key.

Referring to fig. 2 and 3, the main gear 5 is engaged with both the sub gears 2. Each conductive pin 3 includes a conductive rod 31 and a conductive tab 32 extending from a side wall of the conductive rod 31. A conductive rod 31 is coaxially connected to a pinion 2, and a conductive tab 32 is located in the open slot 111. So that the conductive tabs 32 of the two conductive pins 3 are rotated about the conductive rods 31 to protrude out of the respective corresponding open slots 111 by the rotation of the rotary ring 4.

In a preferred embodiment, the pinion 2 may be connected to the conductive pin 3 by injection molding, and the lower end of the pinion 2 may be further formed with a protective sleeve 22, and the protective sleeve 22 covers a portion of the conductive rod 31 and a portion of the conductive tab 32 of the conductive pin 3. Thus, the conductive pin 3 can be insulated and protected from the portion which does not need to be conductive. Preferably, the conductive rod 31 may be flat, and a buckle may be further disposed on the conductive rod 31, and the buckle is clamped with the inner wall of the pinion 2. In this way, the connection of the conductive pin 3 and the main gear 5 can be made more secure.

In order to make it easier for the skilled person to understand the structure of the above-described adapter, this is described here by way of example in connection with the track plate 9. For example, an installation space 91 is formed in the track plate 9, a conductive plug bush 911 is provided on each of the left and right side walls of the installation space 91, and a limit opening 92 into which the limit plate of the adapter is inserted and slid is formed on the top wall of the installation space 91.

As can be seen from the above embodiment of the adapter, before the adapter is mounted on the track plate 9, the rotating ring 4 is rotated to enable the conductive inserting pieces 32 of the two conductive pins 3 to be respectively located in the two open slots 111 of the base 1, after the inserting plate 11 of the base 1 is inserted into the limit opening 92 of the track plate 9, the rotating ring 4 is rotated to enable the conductive inserting pieces 32 of the two conductive pins 3 to be respectively protruded from the two open slots 111, and the two conductive inserting pieces 32 are inserted into the conductive inserting pieces 911 on the left side wall and the right side wall in the track plate 9, so that after the adapter is mounted on the track plate 9, the electrical connection with the track plate 9 is completed simultaneously. The adapter has the advantage of being convenient to install and use.

In a preferred embodiment, the diameter of the main gear 5 may be larger than the diameter of the pinion gear so that the rotating ring 4 can meet the requirements of the range of rotation angles of the conductive tabs 32 by rotating a small rotation angle. Thereby facilitating more convenient mounting of the adapter to the track plate 9.

Referring to fig. 2 and 3, in a preferred embodiment, when the other end of one connecting arm 41 extends to be connected to the bottom surface of the main gear 5, two limiting ribs 12 may be further disposed on the top surface of the base 1, and the two limiting ribs 12 are disposed at a set angle with an axis of the main gear 5 as a center. Wherein the two stop bars 12 are in stop fit with one of the connecting arms 41 to limit the rotational range of the swivel ring 4 to match the rotational range required for the conductive insert 32. At the same time, the problem of damage to the conductive pins 3 and other components in the adapter due to an excessive rotation angle caused by an incorrect operation of the rotating ring 4 can be avoided.

It should be noted that the embodiment in which the rotation range of the rotary ring 4 is limited to match the rotation range required for the conductive tab 32 is not limited thereto, except that the above-described engagement by the stopper rib 12 and the connection arm 41. For example, in an alternative embodiment, the base 1 extends away from its top surface by at least one lever 13, and a latch 131 is provided on the lever 13 on the side facing the annular sidewall 101. Accordingly, the lower portion of the rotary ring 4 is formed with an arc-shaped groove 42 into which the latch 131 is inserted, and the latch 131 is engaged with the arc-shaped groove 42 to limit the rotation range of the rotary ring 4 to match the rotation range required for the conductive tab 32.

Referring to fig. 2 and 3, in a preferred embodiment, the main gear 5 is provided with an annular groove 51 coaxial therewith, the adapter further comprises a torsion spring 6, the torsion spring 6 being coaxially disposed in the annular groove 51 and having one end connected to the main gear 5 and the other end fixedly disposed with respect to the base 1. Thus, when the rotating ring 4 is rotated to an extreme angle, the rotating ring 4 can be automatically restored to the original position by the elastic restoring force of the torsion spring 6. Preferably, the torsion spring 6 may be configured to retract the conductive tab 32 into the open slot 111 after resetting the rotating ring 4. Therefore, under the condition that no human force is applied, the conductive inserting sheet 32 can retract into the opening groove 111, so that people can conveniently extend the inserting plate 11 of the adapter into the track plate 9 from the limit opening 92 of the track plate 9, at the moment, torque is applied to the rotating ring 4, the conductive inserting sheet 32 of the adapter can be inserted into the conductive inserting sleeve 911 of the track plate 9, and final installation is completed.

Illustratively, the annular groove 51 may be oriented toward the base 1 or may be oriented away from the base 1. For example, the annular groove 51 may face the base 1, with one end of the torsion spring 6 being connected to the main gear 5 and the other end being directly connected to the base 1. Referring to fig. 2 and 3, in an alternative embodiment, in an embodiment in which the annular groove 51 faces away from the base 1, the adapter further comprises: a mounting bracket 7, the mounting bracket 7 including a mounting plate 72 and a plurality of legs 71 provided on one side of the mounting plate 72. The mounting plate 72 is disposed above the main gear 5 and connected to one end of the torsion spring 6, and the plurality of legs 71 are connected to the base 1 to fixedly dispose one end of the torsion spring 6 with respect to the base 1.

Referring to fig. 3, in a preferred implementation of the adaptor provided by the above embodiment, the lower ends of the plurality of legs 71 are provided with sockets 711, and the top surface of the base 1 is provided with a plurality of limiting bars 14 and insert blocks 141 extending from the inner sides of the limiting bars 14, the limiting bars 14 limit the outer parts of the legs 71, and the insert blocks 141 are inserted into the sockets 711 to limit the movement of the mounting frame 7 in a direction parallel to the base 1. Wherein the top cover 8 can press the mounting frame 7 between the top cover 8 and the base 1 to limit the movement of the mounting frame 7 in the axial direction.

Further, referring to fig. 3, in the two-hole receptacle embodiment, at least two electrical connectors 34 of the adapter may be provided on the top surface of the mounting frame 7 and for electrical connection with an external plug. Wherein each conductive rod 31 is also electrically connected to one electrical connector 34, respectively.

Preferably, in the three-hole receptacle embodiment, a conductive insert 911 is also provided on the bottom wall of the mounting space 91. Correspondingly, referring to fig. 3, the adapter further comprises a grounding insert 33 and an electrical connector 34 connected with the grounding insert 33, wherein the grounding insert 33 can penetrate through the mounting frame 7 and the main gear 5 to extend out of the bottom surface of the plugboard 11 of the base 1, and the grounding insert 33 is spliced with and electrically connected with a conductive plug bush 911 arranged on the bottom wall of the mounting space 91.

Specifically, the present utility model can achieve the following objects:

firstly, the main gear 5 and the two auxiliary gears 2 are driven to rotate through the rotating ring 4 to drive the two conductive pins 3 to rotate, so that the connection between the adapter and the track plate 9 can be more conveniently completed.

Secondly, by changing the transmission ratio of the main gear 5 and the auxiliary gear 2, the control of the rotation range of the conductive pin 3 can be realized by slightly adjusting the rotation ring 4.

Thirdly, through setting up torsional spring 6, utilize the reset function of torsional spring 6 for the installation of adapter is more convenient.

The utility model relates to the technical field of sockets, in particular to an adapter of a track type socket. The adapter further comprises two secondary gears 2 arranged on the base 1, two conductive pins 3 and a primary gear 5 arranged on the swivel ring 4. Before the adapter is mounted on the track plate 9, the rotary ring 4 is rotated to enable the conductive inserting pieces 32 of the two conductive pins 3 to be respectively located in the two open grooves 111 of the base 1, after the inserting plate 11 of the base 1 extends into the sliding grooves of the track plate 9, the rotary ring 4 is rotated to enable the conductive inserting pieces 32 of the two conductive pins 3 to respectively extend outwards from the two open grooves 111, and the two conductive inserting pieces 32 are inserted into the conductive inserting sleeves 911 on the left side wall and the right side wall in the track plate 9.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model. Nouns and pronouns for humans in this patent application are not limited to a particular gender.

Claims (10)

1. An adapter for a rail receptacle, comprising:

the base (1), the top surface periphery of the base (1) is provided with an annular side wall (101), the bottom of the base is provided with a plugboard (11) extending out, the plugboard (11) is provided with two open slots (111) at intervals along the length direction extending along the bottom surface of the base (1), and the two open slots (111) are respectively positioned at two opposite sides of the plugboard (11);

two pinion gears (2) which are both rotatably connected to the base (1) and respectively correspond to one of the open grooves (111);

two conductive pins (3), wherein the conductive pins (3) comprise a conductive rod (31) and a conductive inserting sheet (32) extending from the side wall of the conductive rod (31); a conductive rod (31) is coaxially connected with one of the pinion gears (2), and the conductive inserting sheet (32) is positioned in the open slot (111);

-a rotating ring (4), the lower part of said rotating ring (4) extending into said annular side wall (101) to be rotatably arranged on said base (1);

a main gear (5), said main gear (5) being coaxially connected to said rotary ring (4) and being in engagement with both of said secondary gears (2) to rotate the conductive tabs (32) of the two conductive pins (3) about the conductive rods (31) by rotation of the rotary ring (4) to protrude out of the respective corresponding open slots (111).

2. The adapter according to claim 1, wherein: the diameter of the main gear (5) is larger than the diameter of the auxiliary gear (2).

3. The adapter according to claim 1, wherein:

the rotating ring (4) further comprises at least one connecting arm (41), one end of the connecting arm (41) is connected to the inner wall of the rotating ring (4), and the other end of the connecting arm (41) extends to be connected with the bottom surface of the main gear (5);

two limit ribs (12) are further arranged on the top surface of the base (1), and the two limit ribs (12) are arranged at intervals by setting angles with the axis of the main gear (5) as the center;

wherein, two spacing bars (12) are in spacing fit with one connecting arm (41) to limit the rotation range of the rotary ring (4) to be matched with the rotation range required by the conductive inserting sheet (32).

4. The adapter according to claim 1, characterized in that the base (1) has at least one bar (13) projecting away from its top surface, a clamping block (131) being provided on the bar (13) on the side facing the annular side wall (101);

an arc-shaped groove (42) into which the clamping block (131) extends is formed in the lower portion of the rotary ring (4), and the clamping block (131) is matched with the arc-shaped groove (42) to limit the rotation range of the rotary ring (4) to be matched with the rotation range required by the conductive inserting piece (32).

5. An adapter according to claim 1, characterized in that the main gear (5) is provided with an annular groove (51) coaxial therewith, the adapter further comprising:

and a torsion spring (6), wherein the torsion spring (6) is coaxially arranged in the annular groove (51), one end of the torsion spring is connected with the main gear (5), and the other end of the torsion spring is fixedly arranged relative to the base (1).

6. The adapter according to claim 5, characterized in that said annular groove (51) faces away from said base (1), said adapter further comprising:

-a mounting frame (7), said mounting frame (7) comprising a mounting plate (72) and a plurality of legs (71) arranged on one side of the mounting plate (72); the mounting plate (72) is arranged above the main gear (5) and connected with one end of the torsion spring (6), and the plurality of supporting legs (71) are connected to the base (1).

7. The adapter according to claim 6, characterized in that the lower ends of the plurality of legs (71) are provided with sockets (711), while the top surface of the base (1) is provided with a plurality of limit bars (14) and plug blocks (141) extending from the inner sides of the limit bars (14), the limit bars (14) limit the exterior of the legs (71), and the plug blocks (141) plug with the sockets (711);

the adapter further comprises:

and the top cover (8) is used for pressing the mounting frame (7) between the top cover (8) and the base (1), and the top cover (8) is connected to the base (1).

8. The adapter according to claim 1, characterized in that the lower end of the pinion (2) is formed with a rotation shaft (21), and the base (1) is formed with a shaft hole (15) adapted to the rotation shaft (21) so that the pinion (2) is rotatably provided on the base (1);

the rotating ring (4) is further provided with:

and the pressing ring (43) is coaxially connected to the inner side of the rotary ring (4), and the pressing ring (43) is positioned above the two pinion gears (2) and limits the two pinion gears (2) in the axial direction.

9. The adapter according to claim 1, characterized in that the pinion (2) is connected to the conductive pin (3) by means of injection moulding, and that the lower end of the pinion (2) is further formed with a protective sleeve (22), the protective sleeve (22) covering part of the conductive rod (31) and part of the conductive insert (32) of the conductive pin (3).

10. The adapter according to claim 9, characterized in that the conductive rod (31) is flat and is further provided with a catch, which is snapped onto the inner wall of the pinion (2).

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