Multifunctional locking structure

Abstract

The invention discloses a multifunctional locking structure, and belongs to the technical field of connectors, the multifunctional locking structure comprises a socket main body, a locking plate, a plug main body, a lead, signal terminals, plugging sheets and plugging pins, a plurality of plugging pins are plugged at the rear end of the socket main body, the plug main body is plugged at the front end of the socket main body, a plurality of signal terminals are plugged in the plug main body, and the front ends of the plugging pins are plugged in the signal terminals. The front end of the signal terminal is inserted with a lead, the rear end of the lead is in contact connection with the front end of the pin, the locking plate sleeves the plug body, the plugging sheets are arranged in pairs, and one end of each plugging sheet is inserted in the front end of the socket body. The problem that the cost is increased due to the fact that a plug and a socket are easy to separate and a lock catch is easy to damage in the prior art is solved. And the cost waste caused by reworking and damage is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of connectors, and particularly to a multi-functional locking structure. Background Art

[0002] After a wire harness factory assembles plugs into finished wire harnesses, defective conditions may occur during the turnover process of the entire wire harness.

[0003] Firstly, if a single wire disengages from the plug body, it directly damages the plug body, thus requiring the plug to be disassembled for rework, which increases the time cost. Then, during turnover, it is impossible to transport only one item. Therefore, during transportation, if the plug lock is squeezed and collapsed by foreign objects, the damaged lock can only be removed and the plug replaced, further increasing the manufacturing cost. Moreover, after the plug and socket are completely installed, due to the large exposed area of the plug lock position, when the lock is squeezed by foreign objects, the plug may fall off.

[0004] Therefore, how to provide a multi-functional locking structure to solve the defects existing in the existing connector joint structure is a technical problem that needs to be urgently solved by those skilled in the art. Summary of the Invention

[0005] For this purpose, the present invention provides a multi-functional locking structure to solve the problem of increased costs caused by the easy separation of the plug and socket and the easy damage of the lock in the prior art.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention discloses a multi-functional locking structure, including:

[0008] A socket body, with a plurality of pins inserted at the rear end, and a plug body inserted at the front end of the socket body;

[0009] A plurality of signal terminals, inserted in the plug body, the front ends of the pins are inserted in the signal terminals, the front ends of the signal terminals are inserted with wires, and the rear ends of the wires are in contact connection with the front ends of the pins;

[0010] A lock piece, sleeved outside the plug body;

[0011] Insertion pieces, arranged in pairs, with one end inserted at the front end of the socket body.

[0012] In a possible implementation manner, the plug body includes:

[0013] A connection block, with a plurality of signal terminal insertion holes opened on the front surface, and a plurality of pin connection holes opened on the rear surface of the connection block, and the pin connection holes are communicated with the signal terminal insertion holes;

[0014] The elastic sheet has an extension block provided at the bottom of the rear end, and the extension block is mounted on the top surface of the connection block. An arc-shaped extension block is connected to the top surface of the front end of the elastic sheet. A baffle is provided at the top of the arc-shaped extension block, and a rectangular hole is formed between the baffle and the arc-shaped extension block;

[0015] The extension plates are provided in pairs and are mounted on the top of the connection block. The extension plates are arranged on the left and right sides of the elastic sheet, and a locking sheet is sleeved outside the extension plates and the connection block;

[0016] The limit blocks are mounted on the upper surface of the elastic sheet, and the limit blocks are arranged behind the baffle;

[0017] The locking blocks are provided in pairs and are mounted on the left and right surfaces of the connection block. Stopping blocks are provided on the upper and lower sides of the locking blocks;

[0018] The card slots are opened at the bottom of the connection block.

[0019] In a possible implementation manner, the locking sheet includes:

[0020] The connecting plates are provided in pairs and are respectively arranged on the left and right sides of the plug body. Limiting grooves are opened on the inner surfaces of the connecting plates;

[0021] The stop bars are mounted at the front ends of the two connecting plates. A plurality of wire dividing bars are mounted at the bottom of the stop bars. A protrusion is provided at the top of the stop bars, and an elastic stop piece is connected to the rear surface of the protrusion. The top of the elastic stop piece abuts against the lower side of the elastic sheet;

[0022] The cover plates are mounted at the tops of the two connecting plates;

[0023] The sliding grooves are opened on the outer side walls of the connecting plates, and the sliding grooves penetrate through the connecting plates inward and extend to the sides of the stop bars;

[0024] A plurality of positioning bars are mounted on the rear surface of the stop bar.

[0025] In a possible implementation manner, the elastic stop piece is of a rectangular structure, two hole grooves are opened on the surface of the rectangular structure, and protruding blocks are mounted on the left and right surfaces of the rectangular structure.

[0026] In a possible implementation manner, the elastic stop piece is two inclined stop bars.

[0027] In a possible implementation manner, the elastic stop piece is of an eight-shaped structure.

[0028] In a possible implementation manner, the signal terminal includes:

[0029] The connecting housing has a through groove in the middle of its top. A rectangular groove is formed on the rear surface of the connecting housing, and the front end of the pin is inserted into the rectangular groove.

[0030] The pressing plate is installed behind the upper plate at the front end of the connecting housing, and a limiting plate is installed at the bottom of the pressing plate.

[0031] The clamping plate is installed at the bottom of the connecting housing.

[0032] The U-shaped plate is installed at the front end of the connecting housing, and the inner surface of the U-shaped plate is an arc structure.

[0033] In a possible implementation, the insert includes:

[0034] The plug-in is a U-shaped structure, and a number of annular protrusions are installed on the inner surface of the plug-in.

[0035] In a possible implementation, a limiting rod is installed on the bottom surface of the front end of the upper plate of the socket body.

[0036] In the present invention, by using signal terminals, the pin and the wire are arranged in the same space, which facilitates the contact connection between the pin and the wire and is not prone to misalignment during use. Similarly, the signal terminal is fixed by the plug body, and the lock piece is used in cooperation with the signal terminal to clamp the wire, so that the wire is not easily detached. Moreover, by using the lock piece, in addition to limiting the wire, each wire can be independently separated and is not easily wound together. Also, the lock piece can limit the plug body, preventing the plug body from separating from the socket body without external force, improving the practicality while reducing the cost consumed by secondary assembly and production. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and those of ordinary skill in the art can also obtain other implementation drawings according to the provided drawings without creative efforts.

[0038] The structures, proportions, sizes, etc. shown in this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship, or adjustment of the size should still fall within the scope covered by the technical content disclosed in the present invention without affecting the effects that the present invention can produce and the purposes that can be achieved.

[0039] Figure 1Stereogram of the multifunctional locking structure provided by the present invention;

[0040] Figure 2 Cross-sectional view of the wire provided by the present invention;

[0041] Figure 3 Stereogram of the plug body provided by the present invention;

[0042] Figure 4 Stereogram of the elastic piece provided by the present invention;

[0043] Figure 5 Cross-sectional view of the connection block provided by the present invention;

[0044] Figure 6 Stereogram of the locking piece provided by the present invention;

[0045] Figure 7 Stereogram of the positioning rod provided by the present invention;

[0046] Figure 8 Stereogram of the rectangular structure provided by the present invention;

[0047] Figure 9 Stereogram of the inclined stop rod provided by the present invention;

[0048] Figure 10 Stereogram of the eight-shaped structure provided by the present invention;

[0049] Figure 11 Stereogram of the signal terminal provided by the present invention;

[0050] Figure 12 Stereogram of the insert piece provided by the present invention;

[0051] Figure 13 Cross-sectional view of the socket body provided by the present invention;

[0052] Figure 14 Cross-sectional view of the limit rod provided by the present invention;

[0053] In the figure: 1 socket body; 11 limit rod; 2 locking piece; 21 cover plate; 22 elastic retaining piece; 221 protruding block; 222 rectangular structure; 223 hole groove; 23 stop rod; 24 wire dividing rod; 25 sliding groove; 26 connecting plate; 27 limiting groove; 28 positioning rod; 3 plug body; 31 extension plate; 32 baffle; 33 connection block; 34 locking block; 35 stop block; 36 elastic piece; 37 limiting block; 38 signal terminal jack; 39 pin connection hole; 310 card slot; 4 wire; 5 signal terminal; 51 pressing plate; 52 U-shaped plate; 53 clamping plate; 54 connection housing; 55 rectangular groove; 56 limiting plate; 6 insert piece; 61 plug-in; 62 annular protrusion; 7 pin. Detailed implementation manners

[0054] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0055] Please refer to Figures 1-14 , and now a multi-functional locking structure disclosed by the present invention will be described. As Figures 1-2 , it includes a socket body 1, a lock piece 2, a plug body 3, a wire 4, a signal terminal 5, an insertion piece 6 and an insertion pin 7. A plurality of insertion pins 7 are inserted into the rear end of the socket body 1, the plug body 3 is inserted into the front end of the socket body 1, a plurality of signal terminals 5 are inserted into the plug body 3, the front end of the insertion pin 7 is inserted into the signal terminal 5, the wire 4 is inserted into the front end of the signal terminal 5, the rear end of the wire 4 is in contact connection with the front end of the insertion pin 7, the lock piece 2 is sleeved outside the plug body 3, the insertion pieces 6 are arranged in pairs, and one end is inserted into the front end of the socket body 1.

[0056] When the present invention is in use, first insert a plurality of signal terminals 5 into the signal terminal jacks 38 of the plug body 3. During insertion, the connection housing 54 enters the signal terminal jack 38 first, and then the U-shaped plate 52 enters. During the entering process, as Figure 2As shown, since the structure of the signal terminal jack 38 is wide at the front end and narrow at the rear end, during the insertion process of the connection housing 54, the clamping plate 53 will be gradually squeezed and then slightly deflected. When the clamping plate 53 is placed at the card slot 310, due to the cancellation of the limit, the clamping plate 53 will reset under the action of its own elasticity, and then the clamping plate 53 will be stuck in the card slot 310, which also synchronously restricts the outward movement of the signal terminal 5. After being properly installed, the rear end of the connection housing 54 will also abut against the end of the signal terminal jack 38, thus preventing the signal terminal 5 from moving further inward. Then, the rear end of the plug body 3 with the signal terminal 5 is inserted from the front opening of the socket body 1. After insertion, the jack of the socket body 1 should be aligned with the pin connection hole 39. Moreover, when the signal terminal 5 is connected to the plug body 3, the pin connection hole 39 is aligned with the rectangular slot 55, and the sizes of these three holes are basically the same as the size of the pin 7. After the three holes are aligned, the pin 7 is passed through the three holes in sequence, so that the end of the pin 7 extends into the connection housing 54, and then the bottom plate and the limiting plate 56 of the connection housing 54 can be used to clamp the pin 7 tightly. After the pin 7 is installed, the positioning rod 28 is aligned with the signal terminal jack 38, and then the signal terminal jack 38 is inserted along the signal terminal jack 38. During the insertion process, the positions of the sliding grooves 25 should be aligned with the locking blocks 34 respectively, and then the upper stop block 35 should be aligned with the limiting groove 27, so as to limit the installation position of the lock piece 2. When the lock piece 2 is installed outside the plug body 3, at this time, the elastic retaining piece 22 will extend into the space between the elastic piece 36 and the connection block 33, and at the same time, the top of the elastic retaining piece 22 will also abut against the bottom surface of the elastic piece 36 to form a limit for the elastic piece 36. The elastic piece 36 itself will abut against the socket body 1, and the double limit is realized by the secondary limit of the elastic retaining piece 22. In this way, not only can the separation of the socket body 1 and the plug body 3 be better avoided, but also when the elastic piece 36 is damaged, the elastic piece 36 can still abut against the socket body 1 to maintain the limiting state. After the lock piece 2 is connected, the wire 4 is inserted from between the positioning rod 28 and the U-shaped plate 52 and docked with the pin 7, and the positioning rod 28 and the U-shaped plate 52 will also clamp the wire 4 tightly. The two insertion pieces 6 are provided to limit the left and right movement of the plug body 3.

[0057] In a specific embodiment, such as Figures 3-5The plug body 3 includes an extension plate 31, a baffle 32, a connection block 33, a locking block 34, a baffle 35, an elastic sheet 36, a limit block 37, a signal terminal jack 38, a pin connection hole 39 and a card slot 310. A plurality of signal terminal jacks 38 are provided on the front surface of the connection block 33, and a plurality of pin connection holes 39 are provided on the rear end surface of the connection block 33. The pin connection holes 39 are connected to the signal terminal jacks 38. An extension block is provided at the bottom of the rear end of the elastic sheet 36, and the extension block is mounted on the top surface of the connection block 33. An arc-shaped portion is connected to the top surface of the front end of the elastic sheet 36. Extension block, a baffle 32 is provided on the top of the arc-shaped extension block, a rectangular hole is formed between the baffle 32 and the arc-shaped extension block, the extension plates 31 are arranged in pairs and installed on the top of the connecting block 33, the extension plates 31 are arranged on the left and right sides of the elastic sheet 36, and the extension plates 31 and the outer sides of the connecting block 33 are sleeved with locking sheets 2, the limit blocks 37 are installed on the upper surface of the elastic sheet 36, the limit blocks 37 are arranged behind the baffle 32, the locking blocks 34 are arranged in pairs and installed on the left and right surfaces of the connecting block 33, the locking blocks 34 are provided with baffles 35 on the upper and lower sides, and the card slot 310 is opened at the bottom of the connecting block 33. The connection block 33 and the extension plate 31 are provided so that the entire plug body 3 can be installed exactly in the socket body 1. When the plug body 3 is installed in the socket body 1, the elastic sheet 36 will be pressed down, and when the rear end of the connection block 33 is against the socket body 1, the elastic sheet 36 will use its own elasticity to press against the inner wall of the upper plate of the socket body 1. In order to ensure that the plug body 3 does not separate from the socket body 1, the limiting rod 11 at the bottom of the top plate of the socket body 1 is used, and then the arc-shaped extension block and the limiting block 37 are cooperated. The arc-shaped extension block and the limiting block 37 will clamp the limiting rod 11 therebetween, so that the movement of the plug body 3 in the socket body 1 can be limited. When the plug body 3 needs to be taken out, it is only necessary to press down the elastic sheet 36 to cancel its own limiting effect, so that the plug body 3 can be taken out. The baffle 32 is used to allow the staff to press the elastic sheet 36. The locking block 34 is provided to limit the locking sheet 2 on the plug body 3 to prevent the locking sheet 2 from separating from the plug body 3. The block 35 has two purposes. First, the upper block 35 is set in the limit groove 27, which can be used to facilitate the connection between the plug body 3 and the locking plate 2 and the positioning during the connection. The two blocks 35 can also limit the up and down movement of the locking plate 2. For the locking block 34, the front end surface is generally set to a sloped structure to facilitate the installation of the locking plate 2.

[0058] In a specific embodiment, Figures 6-7The locking piece 2 includes a cover plate 21, an elastic baffle 22, a baffle rod 23, a wire dividing rod 24, a slide groove 25, a connecting plate 26, a limiting groove 27 and a positioning rod 28. The connecting plates 26 are arranged in pairs and are respectively arranged on the left and right sides of the plug body 3. The limiting grooves 27 are opened on the inner surfaces of the connecting plates 26. The baffle rod 23 is installed at the front ends of the two connecting plates 26. A plurality of wire dividing rods 24 are installed at the bottom of the baffle rod 23. A protrusion is arranged on the top of the baffle rod 23. An elastic baffle 22 is connected to the rear surface of the protrusion. The top of the elastic baffle 22 is against the bottom of the elastic sheet 36. The cover plate 21 is installed at the top of the two connecting plates 26. The slide groove 25 is opened on the outer side wall of the connecting plate 26. The slide groove 25 penetrates the connecting plate 26 inwardly and extends to the side of the baffle rod 23. A plurality of positioning rods 28 are installed on the rear surface of the baffle rod 23. The cover plate 21 will cover the baffle plate 32, so that during transportation, the elastic sheet 36 can be prevented from being crushed, resulting in the plug body 3 and the socket body 1 being unable to be connected together. The setting of the elastic baffle plate 22 can be supported under the elastic sheet 36. While the elastic sheet 36 itself has a limiting effect, the elastic baffle plate 22 is used to have a secondary limiting effect. At the same time, even if the elastic sheet 36 loses its elasticity due to damage, the elastic baffle plate 22 can still be used to press the elastic sheet 36 against the inner wall of the socket body 1 to generate a limiting effect, and the plug body 3 and the socket body are connected. When the locking piece 2 is separated from the wire 4, it is only necessary to press the baffle plate 32. Because the elastic baffle plate 22 and the elastic plate 36 have a certain elasticity, the baffle plate 32 is pressed to press the elastic baffle plate 22 and the elastic plate 36 downward to complete the limit release. The setting of the baffle rod 23 is used to limit the installation depth of the locking piece 2, and the setting of the wire dividing rod 24 can allow each wire 4 to be arranged in an independent space to prevent problems such as knotting. The positioning rod 28 has two functions, one is to limit the installation position of the locking piece 2, and the other is to cooperate with the signal terminal 5 to clamp the wire 4.

[0059] In a specific embodiment, Figure 8 The elastic blocking piece 22 is a rectangular structure 222, and two holes 223 are formed on the surface of the rectangular structure 222. Protrusions 221 are installed on the left and right surfaces of the rectangular structure 222. In the figure, the protrusions 221 are fixedly arranged, and the protrusions 221 are used to press against the elastic piece 36. A better arrangement is to set the protrusions 221 as a sliding structure, so that when the elastic blocking piece 22 moves downward, the protrusions 221 move toward the holes 223, and then provide a space to make way, so that the plug body 3 can be smoothly separated from the socket body 1.

[0060] In a specific embodiment, Figure 9 The elastic stopper 22 is two inclined stoppers. By using two inclined stoppers, the force can be applied to the elastic sheet 36 separately, so that the limiting effect is better.

[0061] In a specific embodiment, Figure 10, the elastic retaining piece 22 is in an eight-shaped structure. The eight-shaped structure can expand the force application point outwards, which is a further expansion of the inclined shift lever, and the purpose is still to generate better limiting force.

[0062] In a specific embodiment, such as Figure 11 , the signal terminal 5 includes a pressing plate 51, a U-shaped plate 52, a clamping plate 53, a connecting housing 54, a rectangular groove 55 and a limiting plate 56. A through groove is opened in the middle of the top of the connecting housing 54, and a rectangular groove 55 is opened on the rear surface of the connecting housing 54. The front end of the pin 7 is inserted into the rectangular groove 55. The pressing plate 51 is installed behind the upper plate at the front end of the connecting housing 54. A limiting plate 56 is installed at the bottom of the pressing plate 51. The clamping plate 53 is installed at the bottom of the connecting housing 54. The U-shaped plate 52 is installed at the front end of the connecting housing 54, and the inner surface of the U-shaped plate 52 is in an arc structure. The purpose of setting the pressing plate 51 is to enable the limiting plate 56 to have more installation positions, so as to better limit the inserting piece 6. The arc structure of the inner surface of the U-shaped plate 52 is to better adapt to the wire 4. For the clamping plate 53, when the signal terminal 5 is taken out from the plug body 3, since the clamping plate 53 itself is an elastic structure, it is necessary to press the clamping plate 53 so that the clamping plate 53 disengages from the card slot 310 to cancel the limit, and then the signal terminal 5 can be withdrawn from the plug body 3.

[0063] In a specific embodiment, such as Figure 12 , the inserting piece 6 includes a plug-in 61 and an annular protrusion 62. The plug-in 61 is in a U-shaped structure, and a plurality of annular protrusions 62 are installed on the inner surface of the plug-in 61. The annular protrusions 62 are provided to better clamp the plug-in 61 in the socket body 1, and the plug-in 61 can prevent the plug body 3 from moving left and right.

[0064] In a specific embodiment, such as Figures 13-14 , a limiting rod 11 is installed on the bottom surface of the front end of the upper plate of the socket body 1. The setting of the limiting rod 11 can make the plug body 3 better clamped in the socket body 1.

[0065] Although the present invention has been described in detail above with general descriptions and specific embodiments, on the basis of the present invention, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection required by the present invention.

Claims

1. A multi-functional locking structure, characterized in that, Comprising: A socket body (1) with a number of pins (7) inserted at the rear end, and a plug body (3) inserted at the front end of the socket body (1); A number of signal terminals (5) inserted in the plug body (3), the front ends of the pins (7) being inserted in the signal terminals (5), the front ends of the signal terminals (5) having wires (4) inserted, and the rear ends of the wires (4) being in contact connection with the front ends of the pins (7); A locking piece (2) sleeved outside the plug body (3); Insertion pieces (6) arranged in pairs, with one end inserted at the front end of the socket body (1).

2. The multi-functional locking structure according to claim 1, characterized in that, The plug body (3) includes: A connection block (33) having a number of signal terminal insertion holes (38) opened on the front surface, and a number of pin connection holes (39) opened on the rear surface of the connection block (33), the pin connection holes (39) being in communication with the signal terminal insertion holes (38); An elastic piece (36) having an extension block provided at the bottom of the rear end, the extension block being installed on the top surface of the connection block (33), an arc-shaped extension block being connected to the top surface of the front end of the elastic piece (36), a baffle (32) being provided at the top of the arc-shaped extension block, and a rectangular hole being formed between the baffle (32) and the arc-shaped extension block; Extension plates (31) arranged in pairs and installed on the top of the connection block (33), the extension plates (31) being provided on the left and right sides of the elastic piece (36), and the extension plates (31) and the connection block (33) having the locking piece (2) sleeved outside; A limit block (37) installed on the upper surface of the elastic piece (36), the limit block (37) being provided behind the baffle (32); Locking blocks (34) arranged in pairs and installed on the left and right surfaces of the connection block (33), and stoppers (35) being provided on the upper and lower sides of the locking blocks (34); A card slot (310) opened at the bottom of the connection block (33).

3. The multi-functional locking structure according to claim 2, wherein, The locking piece (2) includes: Connection plates (26) arranged in pairs and respectively provided on the left and right sides of the plug body (3), and limit slots (27) being opened on the inner surfaces of the connection plates (26); A blocking rod (23) installed at the front ends of the two connection plates (26), a number of wire separating rods (24) being installed at the bottom of the blocking rod (23), a protrusion being provided at the top of the blocking rod (23), and an elastic blocking piece (22) being connected to the rear surface of the protrusion, the top of the elastic blocking piece (22) abutting against the lower side of the elastic piece (36); A cover plate (21) installed at the top ends of the two connection plates (26); A sliding slot (25) opened on the outer side wall of the connection plate (26), the sliding slot (25) penetrating through the connection plate (26) inward and extending to the side of the blocking rod (23); A number of positioning rods (28) installed on the rear surface of the blocking rod (23).

4. The multi-functional locking structure according to claim 3, wherein The elastic blocking piece (22) is of a rectangular structure (222), two hole slots (223) being opened on the surface of the rectangular structure (222), and protruding blocks (221) being installed on the left and right surfaces of the rectangular structure (222).

5. The multi-functional locking structure according to claim 3, characterized in that, The elastic blocking piece (22) is two inclined blocking rods.

6. The multi-functional locking structure according to claim 3, characterized in that The elastic blocking piece (22) is of an eight-shaped structure.

7. The multi-functional locking structure according to claim 1, wherein, The signal terminal (5) includes: Connecting housing (54), with a through groove opened in the middle of the top. A rectangular groove (55) is opened on the rear surface of the connecting housing (54), and the front end of the pin (7) is inserted into the rectangular groove (55); Pressure plate (51), installed behind the upper plate at the front end of the connecting housing (54), and a limiting plate (56) is installed at the bottom of the pressure plate (51); Clamping plate (53), installed at the bottom of the connecting housing (54); U-shaped plate (52), installed at the front end of the connecting housing (54), and the inner surface of the U-shaped plate (52) is an arc structure.

8. The multi-functional locking structure according to claim 1, wherein The insertion piece (6) includes: Plug-in (61), which is a U-shaped structure, and a number of annular protrusions (62) are installed on the inner surface of the plug-in (61).

9. The multi-functional locking structure according to claim 1, characterized in that, A limiting rod (11) is installed on the bottom surface at the front end of the upper plate of the socket body (1).

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