Head housing and plug

Abstract

The utility model discloses a head housing and a plug, an insertion end of the head housing is axially provided with a first key groove and a second key groove, in a circumferential direction, the first key groove comprises a first axial groove distributed along the axial direction, the bottom of the first axial groove is provided with a first circumferential groove along the circumferential direction, the first key groove further comprises a key groove branch, and the second key groove is provided with a second axial groove. The bottom of the key groove branch is communicated with the first axial groove, the other end of the key groove branch faces the top of the head shell, the included angle between the key groove branch and the first axial groove is an acute angle, the top of the first axial groove is further provided with a sedimentation step, the sedimentation step extends downwards to the joint of the key groove branch and the first axial groove, and on the axial projection, the sedimentation step extends downwards. The groove depth of the key groove branch is larger than or equal to that of the settlement step. The beneficial effects of the utility model are that the first key groove and the second key groove are arranged at intervals, and the first key groove is also provided with the key groove branch, so that the plug and the socket are convenient to insert, and can be locked only through direct insertion type direct pushing and small-angle rotation.

Description

Technical Field

[0001] The utility model relates to a connector, in particular to a head shell and a plug. Background Art

[0002] The existing push-pull connector uses spring force to push in axially, and the steel ball enters the groove to achieve locking. The disadvantage is that the steel ball locking method is not firm. The steel ball is riveted to the seat shell by riveting, which has the risk of falling off. In addition, when the steel ball is riveted, it is necessary to ensure that the highest point and the lowest point of all the steel balls are consistent. The process is complicated and the cost is high. Second, when the connector is separated, only axial push and pull are required, and the plug and socket can be separated. During the operation of the equipment, if the connector is subjected to axial collision force, the connector may be separated, causing safety hazards during use.

[0003] After long-term research, the inventor has developed a connector. For the connector, both the socket and the plug are improved, and then a head shell and a plug are proposed. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a head shell and a plug.

[0005] The purpose of the utility model is achieved through the following technical solutions: a head shell, the insertion end of the head shell is axially provided with a first keyway and a second keyway, in the circumferential direction, the first keyway is located on one side of the second keyway, the first keyway includes a first axial groove distributed along the axial direction, the bottom of the first axial groove is provided with a first circumferential groove along the circumferential direction, a first flaring groove is provided at the junction of the first axial groove and the first circumferential groove, the first keyway also includes a keyway branch, the bottom of the keyway branch is connected to the first axial groove, and the other end of the keyway branch faces the top of the head shell, and the keyway branch is connected to the first axial groove. The included angle of the axial groove is an acute angle. A settlement step is also provided at the top of the first axial groove, which extends downward to the junction of the keyway branch and the first axial groove. In the axial projection, the groove depth of the keyway branch is greater than or equal to the groove depth of the settlement step. The keyway branch is opened in the same direction as the first circumferential groove. The second keyway includes an axially distributed second axial groove. A second circumferential groove is provided at the bottom of the second axial groove along the circumferential direction. A first flaring groove is provided at the junction of the second axial groove and the second circumferential groove. In the axial projection, the second circumferential groove is opened in the same direction as the first circumferential groove.

[0006] A plug includes a head shell, a connecting sleeve, a tail nut, a jack assembly, and a mounting plate. The connecting sleeve is slidably mounted on the head shell. A locking mechanism is provided on the connecting sleeve. The connecting sleeve and the head shell are locked by the locking mechanism. The rear end of the jack assembly is sealed and mounted in the rear end cavity of the head shell. The front end of the jack assembly is mounted in the mounting plate. The mounting plate is located in the front end cavity of the head shell. A tail nut is installed at the front end of the head shell. The tail nut abuts against the front end surface of the mounting plate.

[0007] Optionally, with the insertion direction of the head shell as the rear, the head shell includes, from rear to front, a first cylinder, a second cylinder, a third cylinder and a fourth cylinder which are connected in sequence, and the first keyway and the second keyway are both opened on the first cylinder.

[0008] Optionally, a second spring is mounted on the third cylinder, the front end of the connecting sleeve is slidably mounted on the fourth cylinder, and the third cylinder is located in the connecting sleeve, an inner convex ring is provided on the inner side of the rear end of the connecting sleeve, one end of the second spring abuts against the inner convex ring, and one end of the second spring abuts against the front end surface of the fourth cylinder, a convex key with an inclined surface is provided on the fourth cylinder, and a guide groove corresponding to the convex key is provided at the front end of the connecting sleeve, and the convex key is located in the corresponding guide groove.

[0009] Optionally, a guide groove is provided on the inner convex ring, and an outer convex guide key that slidably cooperates with the guide groove is provided on the third cylinder.

[0010] Optionally, an outer convex ring is provided in the middle of the jack assembly, an annular groove is provided on the outer convex ring, and the rear end of the mounting plate is clamped in the annular groove.

[0011] Optionally, the mounting plate includes a first semicircular plate and a second semicircular plate, and the rear ends of the first semicircular plate and the second semicircular plate are both provided with an inwardly protruding arc-shaped clamping block, and the arc-shaped clamping block is clamped in the annular clamping groove.

[0012] Optionally, the locking mechanism includes a lock core having an arc-shaped groove thereon, the arc-shaped groove matching the arc of the third cylinder of the shell, a lock hole being laterally provided on the connecting sleeve, the lock hole and the inner cavity of the connecting sleeve forming a through opening, the arc-shaped groove being located at the through opening, a flat surface being provided at the rear end of the third cylinder, when the arc-shaped groove is facing the flat surface, the connecting sleeve and the head shell can slide relative to each other, and when the arc-shaped groove turns away from the flat surface, the connecting sleeve and the head shell are locked by the lock core.

[0013] Optionally, the lock core includes a rod body, an arc-shaped groove is formed on the rod body, a rotating head is formed at one end of the rod body, and a positioning reference is provided on the rotating head.

[0014] The utility model has the following advantages:

[0015] 1. The head housing of the utility model is provided with a first keyway and a second keyway at intervals, and the first keyway also has a keyway branch, so that the plug and the socket can be easily plugged in, and can be locked by simply pushing them in directly and turning them at a small angle;

[0016] 2. A locking mechanism is provided on the head shell. After the plug and the socket are plugged in, they are locked by the locking mechanism, so that the connecting sleeve and the head shell cannot move axially relative to each other, thereby ensuring the relative fixation of the positions of the plug and the socket. When used in harsh vibration and shock environments, there is no risk of falling off, thereby ensuring the reliability of the use of the connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the push-pull connector with self-locking protection

[0018] Figure 2 Schematic diagram of the socket structure Figure 1 ;

[0019] Figure 3 Schematic diagram of the socket structure Figure 2 ;

[0020] Figure 4 is a cross-sectional schematic diagram of a socket;

[0021] Figure 5 It is a schematic diagram of the structure after the seat housing and the pin assembly are assembled;

[0022] Figure 6 for Figure 5 A cross-sectional schematic diagram of

[0023] Figure 7 It is a schematic diagram of the connection between the pin, the gusset plate and the spring;

[0024] Figure 8 It is a structural schematic diagram of the gusset plate;

[0025] Fig. 9 Schematic diagram of the plug structure Figure 1 ;

[0026] Fig.10 Schematic diagram of the plug structure Figure 2 ;

[0027] Fig.11 is a cross-sectional schematic diagram of a plug;

[0028] Fig.12 The structure of the connecting sleeve is shown in FIG. Figure 1 ;

[0029] Fig.13 The structure of the connecting sleeve is shown in FIG. Figure 2 ;

[0030] Fig.14 It is a schematic diagram of the structure of the head shell;

[0031] Fig.15 It is a schematic diagram of the installation of the mounting plate and the jack assembly;

[0032] Fig.16 is a schematic diagram of the structure of the jack assembly;

[0033] Fig.17 It is a structural schematic diagram of the lock core;

[0034] In the figure, 1-socket, 2-plug, 10-seat shell, 20-gasket, 30-locking nut, 40-buckle plate, 50-spring, 60-pin, 70-pin assembly, 11-convex ridge, 12-platform, 13-hollow channel, 14-mounting cavity, 15-through hole, 16-arc groove, 17-flange, 41-cantilever beam, 42-boss, 43-plate body, 44-undercut outer teeth, 61-guide block, 62-rod, 63-arc plate, 64-convex nail, 100-head shell, 200-connecting sleeve, 300-sheath, 400-tail nut, 500-jack assembly, 600-mounting plate, 700-second spring, 110-first cylinder, 120-second cylinder, 130-third cylinder, 140-fourth cylinder, 111-first keyway, 112-second keyway, 101-first axial groove, 102-first circumferential groove, 103-sinking step, 104-first flaring groove, 105-keyway branch, 113-second axial groove, 114-second flaring groove, 115-second circumferential groove, 131-external convex guide key, 132-flat surface, 141-positioning convex key, 201-guide slide groove, 202-lock hole, 203-inner convex ring, 204-guide groove, 205-stop key, 206-through mouth, 210-lock core, 211-rod body, 212-arc groove, 213-rotating head, 214-slot, 215-positioning reference, 501-external convex ring, 502-annular groove, 601-first semicircular plate, 602-second semicircular plate. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0039] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] like Figure 1 As shown, the push-pull connector with self-locking protection includes a plug 2 and a socket 1 for insertion, as shown in FIG. Figure 2 , Figure 3 and Figure 4 As shown, the socket 1 includes a housing 10, a pin assembly 70 is installed in the housing 10, and a pin retracting mechanism is also installed on the housing 10. Figure 3As shown, the inner cavity of the seat housing 10 is also provided with a first convex key and a second convex key. In the circumferential direction, the first convex key is located on one side of the second convex key, and in the axial direction, the first convex key is located in front of the pin telescopic mechanism. Figure 5 and Figure 6 As shown, a platform 12 is provided at the rear end of the seat shell 10, and a rib 11 is axially provided at the front end of the seat shell 10, the rib 11 extends rearward to the rear end of the seat shell 10, and the rear end of the rib 11 is located above the platform 12, a hollow channel 13 is formed between the rib 11 and the platform 12, the rear end of the rib 11 is connected to the rear end of the platform 12 through a connecting piece, and an installation cavity 14 is formed between the rib 11, the connecting piece and the platform 12. In the present embodiment, the seat shell 10 is a multi-stage stepped seat shell 10, and between two adjacent stages of the seat shell 10, the diameter of the front seat shell 10 is larger than the diameter of the rear seat shell 10. Optionally, the seat shell 10 is a three-stage stepped seat shell 10, wherein the rib 11 is provided on the first stage shell, and the platform 12 spans the second stage shell and the third stage shell, and the installation cavity 14 formed between the rib 11, the connecting piece and the platform 12 is a rectangular cavity, as shown in FIG. Figure 2 As shown, a buckle plate 40 is detachably installed in the installation cavity 14. In this embodiment, as shown in FIG. Figure 7 As shown, the pin 60 includes a guide block 61, a protruding rod portion 62 is provided at one end of the guide block 61, an arc plate 63 extending axially is provided on the end surface of the rod portion 62, and a convex pin 64 facing the axis is provided on the end of the arc plate 63 away from the rod portion 62. In this embodiment, a through hole 15 is provided on the seat shell 10 at the front end of the hollow channel 13, and the through hole 15 extends forward to the cavity at the front end of the seat shell 10, and an arc groove 16 is formed on the cavity wall of the cavity. The guide block 61 of the pin 60 is slidably fitted in the hollow channel 13, and a first spring 50 is installed between the guide block 61 and the buckle plate 40. The rod portion 62 of the pin 60 is fitted and It is installed in the through hole 15, and the arc plate 63 is located in the arc groove 16, the convex pin 64 is located in the cavity at the front end of the seat shell 10, and the convex pin 64 is located in front of the through hole 15. When the convex pin 64 is squeezed by external force, the first spring 50 is compressed, so that the entire pin 60 moves axially backward. When the external force disappears, the pin 60 is reset under the elastic restoring force of the first spring 50. In this embodiment, when the pin 60 is installed, the first spring 50 is in a slightly compressed state, that is, at this time the arc plate 63 abuts against the front end surface of the arc groove 16. Optionally, the arc groove 16 is a semicircular groove, and the arc plate 63 is a semicircular plate.

[0042] In this embodiment, if Figure 8As shown, a boss 42 is provided on the front end surface of the buckle plate 40, and a protrusion is provided on the rear end surface of the guide block 61. The rear end of the first spring 50 is sleeved on the boss 42, and the front end of the first spring 50 is sleeved on the protrusion, thereby ensuring the reliability of the installation of the first spring 50, so that the first spring 50 is not easy to slip off.

[0043] In this embodiment, if Figure 8 As shown, the buckle plate 40 includes a plate body 43, and cantilever beams 41 are arranged in pairs on the front end surface of the plate body 43. The cantilever beams 41 located on the left and right sides are provided with inverted external teeth 44, and the inverted external teeth 44 are inverted on the front end surface of the connecting piece. Optionally, there are four cantilever beams 41, and the four cantilever beams 41 form a rectangular cavity, and the guide block 61 is a rectangular block. The cross-section of the hollow channel 13 is also rectangular, and the boss 42 is located in the middle of the rectangular cavity, and the guide block 61 slides in the hollow channel 13 in front of the cantilever beam 41. Moreover, due to the cooperation between the guide block 61 and the hollow channel 13, the entire pin 60 can only move axially but cannot rotate circumferentially. Of course, when the pin 60 is designed, in the axial projection, the convex pin 64 is located at the projection where the through hole 15 is located. The projection of the installation cavity 14 is formed in the projection of the installation cavity 14, and the guide block 61 is located in the projection of the installation cavity 14. During installation, the pin 60 is inserted from the rear end of the installation cavity 14, and then the pin 60 is pushed forward until the arc plate 63 abuts against the front end surface of the arc groove 16, and then the first spring 50 is installed on the protrusion, and finally the buckle plate 40 is installed in the installation cavity 14. When installing the buckle plate 40, the boss 42 needs to be aligned with the first spring 50, and then the buckle plate 40 is inserted into the installation cavity 14. During the insertion process, the inverted outer teeth 44 are subjected to force, so that the corresponding cantilever beam 41 is compressed inwardly. When the inverted outer teeth 44 pass over the connecting plate, the cantilever beam 41 is reset under the action of the elastic restoring force, so that the inverted outer teeth 44 are buckled on the front end surface of the connecting plate, thereby completing the installation of the pin 60.

[0044] In this embodiment, if Figure 7 As shown, an annular groove is provided on the rod portion 62, and a first sealing ring is installed in the annular groove. In this embodiment, although the first sealing ring is provided, the elastic restoring force of the selected first spring 50 still pushes the pin 60 to move in the through hole 15.

[0045] In this embodiment, if Figure 2 , Figure 3 and Figure 4 As shown, the socket 1 also includes a pin assembly 70, which is installed in the cavity of the seat shell 10, and the rear end of the pin assembly 70 passes through the seat shell 10. A gasket 20 and a locking nut 30 are also mounted on the rear end of the pin assembly 70. The gasket 20 is located between the seat shell 10 and the locking nut 30. The assembly of the pin assembly 70 and the seat shell 10 belongs to the prior art and will not be described in detail.

[0046] In this embodiment, if Figure 2 , Figure 3 and Figure 4 As shown, a flange 17 is provided at the front end of the seat shell 10, a sealing ring is installed on the rear side of the flange 17, and a conductive sheet is installed on the front end surface of the flange 17. The installation of the sealing ring and the conductive sheet also belongs to the prior art and will not be described in detail.

[0047] In this embodiment, if Fig. 9 , Fig.10 and Fig.11 The plug 2 includes a head housing 100 and a jack assembly 500, the jack assembly 500 is installed in the head housing 100, the insertion end of the head housing 100 is axially provided with a first keyway 111 and a second keyway 112, in the circumferential direction, the first keyway 111 is located on one side of the second keyway 112, the first keyway 111 includes a first axial groove 101 distributed along the axial direction, the bottom of the first axial groove 101 is provided with a first circumferential groove 102 along the circumferential direction, the first axial groove 101 and the first circumferential groove 102 The connection is provided with a first flaring groove 104, the first keyway 111 also includes a keyway branch 105, the bottom of the keyway branch 105 is connected to the first axial The keyway branch 105 is connected to the groove 101, and the other end of the keyway branch 105 faces the top of the head shell 100. The rear end of the keyway branch 105 does not pass through the rear end of the head shell 100. The angle between the keyway branch 105 and the first axial groove 101 is acute. A settling step 103 is also provided on the top of the first axial groove 101. The settling step 103 extends downward to the junction of the keyway branch 105 and the first axial groove 101. In the axial projection, the groove depth of the keyway branch 105 is greater than or equal to the groove depth of the settling step 103, so that after the head shell 100 is rotated, the protruding nail 64 located in the settling step 103 can enter the keyway branch 105.

[0048] In this embodiment, if Fig.10 As shown, the keyway branch 105 is opened in the same direction as the first circumferential groove 102, the second keyway 112 includes an axially distributed second axial groove 113, the bottom of the second axial groove 113 is provided with a second circumferential groove 115 along the circumferential direction, and a second flared groove 114 is provided at the junction of the second axial groove 113 and the second circumferential groove 115. In the axial projection, the second circumferential groove 115 is opened in the same direction as the first circumferential groove 102. In this embodiment, in the circumferential direction, the spacing between the first axial groove 101 and the second axial groove 113 is the same as the spacing between the first cam and the second cam, so when the first cam enters the first axial groove 101, the second cam can also enter the second axial groove 113.

[0049] In this embodiment, when the plug 2 and the socket 1 are plugged into each other, the first convex key slides along the first axial groove 101, and the second convex key moves along the second axial groove 113. When the first convex key moves to the bottom of the first axial groove 101, the convex nail 64 of the pin retracting mechanism abuts against the front end surface of the sinking step 103, and then the plug 2 is rotated, so that the first convex key enters the first circumferential groove 102, and the second convex key enters the second circumferential groove. At this time, the convex nail 64 of the pin retracting mechanism enters the keyway branch 105, and during the circumferential rotation of the plug 2, the keyway branch 105 applies a thrust to the convex nail 64, thereby contracting the first spring 50, and the first spring 50 generates an elastic restoring force. When the plug 2 can no longer continue to rotate, the first spring 50 generates an elastic restoring force. When the circumferential rotation continues, the installation of the plug 2 and the socket 1 is completed. At this time, the convex nail 64 abuts against the rear end face of the keyway branch 105. Since the first spring 50 contracts, the elastic restoring force generated by the first spring 50 is transmitted to the keyway branch 105 through the convex nail 64, and then has an axial thrust on the head shell 100. Since the first convex key is stuck in the first circumferential groove 102 and the second convex key is stuck in the second circumferential groove 115, the axial displacement between the head shell 100 and the seat shell 10 is no longer possible, thereby ensuring the reliability of the plug-in connection between the head shell 100 and the seat shell 10. Even if an axial thrust is applied to the head shell 100 and the seat shell 10, the separation of the head shell 100 and the seat shell 10 cannot be achieved.

[0050] In this embodiment, if Fig. 9 , Fig.10 and Fig.11 The plug 2 also includes a connecting sleeve 200, a tail nut 400 and a mounting plate 600. The connecting sleeve 200 is slidably mounted on the head shell 100. A locking mechanism is provided on the connecting sleeve 200. The connecting sleeve 200 and the head shell 100 are locked by the locking mechanism. The rear end of the jack assembly 500 is sealed and mounted in the rear end cavity of the head shell 100. The front end of the jack assembly 500 is mounted in the mounting plate 600. The mounting plate 600 is located in the front end cavity of the head shell 100. The front end of the head shell 100 is mounted with a tail nut 400. The tail nut 400 abuts against the front end surface of the mounting plate 600. In this embodiment, the insertion direction of the head shell 100 is the rear, as shown in FIG. Fig.14As shown, the head housing 100 includes, from back to front, a first cylinder 110, a second cylinder 120, a third cylinder 130 and a fourth cylinder 140 which are connected in sequence, the first key groove 111 and the second key groove 112 are both provided on the first cylinder 110, the third cylinder 130 is sleeved with a second spring 700, the front end of the connecting sleeve 200 is slidably mounted on the fourth cylinder 140, and the third cylinder 130 is located in the connecting sleeve 200, an inner convex ring 203 is provided on the inner side of the rear end of the connecting sleeve 200, one end of the second spring 700 abuts against the inner convex ring 203, one end of the second spring 700 abuts against the front end surface of the fourth cylinder 140, and the fourth cylinder 14 0 is provided with a positioning convex key 141 with an inclined surface, and a guide groove 201 corresponding to the positioning convex key 141 is opened at the front end of the connecting sleeve 200, and the positioning convex key 141 is located in the corresponding guide groove 201. Through the cooperation of the positioning convex key 141 and the guide groove 201, the connecting sleeve 200 and the head shell 100 can only move axially. Further, the guide groove 201 is a strip groove, and the length of the strip groove in the axial direction is the spacing of the connecting sleeve 200 relative to the head shell 100. In order to facilitate the installation of the connecting sleeve 200, the rear end face of the positioning convex key 141 is provided with an inclined surface. Further, the positioning convex key 141 is multiple, and the circumferential direction is arranged. The guide grooves 201 corresponding to the positioning convex keys 141 are of course multiple and are arranged at intervals in the circumferential direction. The cooperation between the guide grooves 201 and the positioning convex keys 141 can not only limit the axial movement distance between the connecting sleeve 200 and the head shell 100, but also prevent the connecting sleeve 200 from rotating circumferentially relative to the head shell 100. Furthermore, in order to prevent the connecting sleeve 200 from rotating circumferentially relative to the head shell 100 and to ensure the axial movement accuracy of the connecting sleeve 200, a guide groove 204 is provided on the inner convex ring 203, and an outer convex guide key 131 slidably matched with the guide groove 204 is provided on the third cylinder 130. The connecting sleeve 200 is installed When the second spring 700 is connected to the guide groove 201, the second spring 700 is squeezed by the inner convex ring 203, thereby causing the second spring 700 to produce elastic deformation. Therefore, the positioning key 141 abuts against the front end surface of the guide groove 201 under the action of the second spring 700.

[0051] In this embodiment, the locking mechanism includes a lock core 210, such as Fig.17As shown, an arc-shaped groove 212 is provided on the lock core 210, and the arc-shaped groove 212 matches the arc of the third cylinder 130 of the shell. A lock hole 202 is horizontally provided on the connecting sleeve 200, and the lock hole 202 and the inner cavity of the connecting sleeve 200 form a through opening 206, and the arc-shaped groove 212 is located at the through opening 206. A flat surface 132 is provided at the rear end of the third cylinder 130. When the arc-shaped groove 212 is facing the flat surface 132, the connecting sleeve 200 and the head shell 100 can slide relatively. When the arc-shaped groove 212 is away from the flat surface 132, the connecting sleeve 200 and the head shell 100 are locked by the lock core 210. Optionally, the lock hole 202 is a blind hole, and the lock hole 202 is a stepped hole, and the lock core 210 includes a rod body 211, and the arc-shaped groove 212 is provided on the rod body 211. One end of the rod body 211 A rotating head 213 is provided, and a positioning reference 215 is provided on the rotating head 213. The diameter of the rotating head 213 is larger than the diameter of the rod body 211. Furthermore, the lock core 210 and the lock hole 202 are in an interference fit. When a circumferential rotational force is applied to the lock core 210, the lock core 210 can rotate relative to the lock hole 202. Moreover, when the lock core 210 and the lock hole 202 are in an interference fit state, the lock core 210 is not easy to fall out of the lock hole 202. In order to facilitate rotation, a slot 214 is provided on the rotating head 213, and a slotted screwdriver can be used to apply rotational force thereto. The positioning reference 215 can be selected as a convex bulge. By observing the position of the convex bulge, the position of the arc-shaped groove 212 can be determined. Preferably, when the arc-shaped groove 212 faces the concave surface, the convex bulge is located at the "9" o'clock direction of the rotating head 213.

[0052] In this embodiment, if Fig.12 and Fig.13 As shown, a stop key 205 is provided on the inner cavity wall at the rear end of the connecting sleeve 200, and a stop groove matching the stop key 205 is provided on the outer wall at the front end of the head shell 100. After the plug 2 and the socket 1 are installed, the stop key 205 is installed in the stop groove. During the installation process of the plug 2 and the socket 1, an axial forward thrust is applied to the connecting sleeve 200, thereby moving the connecting sleeve 200 forward. After the first convex key, the convex nail 64 and the second convex key are installed, the connecting sleeve 200 is released, and the connecting sleeve 200 is reset under the elastic restoring force of the second spring 700. At this time, the stop key 205 cooperates with It is installed in the anti-rotation groove to prevent the head shell 100 and the seat shell 10 from axial rotation, thereby ensuring the reliability of the connection between the plug 2 and the socket 1. When the head shell 100 and the seat shell 10 are connected, the lock core 210 is rotated to make the arc groove 212 away from the flat surface 132, so that the connecting sleeve 200 cannot move relative to the head shell 100, thereby ensuring the stability of the position of the connecting sleeve 200, and further ensuring the reliability of the connection between the plug 2 and the socket 1. In this embodiment, a protective sleeve 300 is mounted on the outer side of the connecting sleeve 200 to protect the connecting sleeve 200.

[0053] In this embodiment, if Fig.15 and Fig.16 As shown, an outer convex ring 501 is provided in the middle of the jack assembly 500, and an annular groove 502 is provided on the outer convex ring 501. The mounting plate 600 includes a first semicircular plate 601 and a second semicircular plate 602. The rear ends of the first semicircular plate 601 and the second semicircular plate 602 are both provided with an inwardly protruding arc-shaped block, which is stuck in the annular groove 502.

[0054] The working process of plugging the plug 2 and the socket 1 is as follows: align the arc groove 212 of the lock core 210 with the flat surface 132. At this time, the connecting sleeve 200 can slide relative to the head shell 100, and then the plug 2 and the socket 1 are plugged together. During the plugging process, the first convex key first enters the first axial groove 101, and at the same time, the second convex key also enters the second axial groove 113. As the plug 2 and the socket 1 continue to be plugged together, when the seat shell 10 is about to approach the connecting sleeve 200, an axial forward external force is applied to the connecting sleeve 200, so that the connecting sleeve 200 moves to the front end, and then the plug 2 and the socket 1 continue to be plugged together. When the first convex key enters the front end of the first axial groove 101, at this time, the convex nail 64 abuts against the front end surface of the sinking step 103, and then a rotational force is applied to the plug 2 or the socket 1. The key enters into the first circumferential groove 102, and at the same time, the second convex key enters into the second axial groove 113. During the rotation of the plug 2 or the socket 1, the convex nail 64 enters into the keyway branch 105 and moves along the keyway branch 105. The keyway branch 105 has an axial backward thrust on the convex nail 64, thereby compressing the first spring 50. When the first convex key is installed in place, at this time, the connecting sleeve 200 is released, and the connecting sleeve 200 is reset under the action of the second spring 700. At this time, the anti-rotation key 205 enters into the anti-rotation groove, thereby preventing the plug 2 and the socket 1 from rotating relative to each other, and then the lock core 210 is rotated so that the arc-shaped groove 212 of the lock core 210 deviates from the flat surface 132, so that the position of the connecting sleeve 200 and the head shell 100 is relatively fixed, and the plug-in and engagement of the plug 2 and the socket 1 is completed.

[0055] The working process of separating the plug 2 and the socket 1 is as follows: rotate the lock cylinder 210 to open the connecting sleeve 200, push the connecting sleeve 200 forward, and then rotate the plug 2 and the socket 1 in opposite directions. When the first convex key and the convex nail 64 move into the first axial groove 101 and the second convex key moves into the second axial groove 113, axially pull out the plug 2 and the socket 1, and the plug 2 and the socket 1 are separated.

[0056] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A head housing, characterized in that: The insertion end of the head shell is axially provided with a first keyway and a second keyway. In the circumferential direction, the first keyway is located on one side of the second keyway. The first keyway includes a first axial groove distributed along the axial direction. The bottom of the first axial groove is provided with a first circumferential groove along the circumferential direction. A first flaring groove is provided at the junction of the first axial groove and the first circumferential groove. The first keyway also includes a keyway branch. The bottom of the keyway branch is connected to the first axial groove, and the other end of the keyway branch faces the top of the head shell. The angle between the keyway branch and the first axial groove is an acute angle. A settlement step is also provided at the top of the axial groove, and the settlement step extends downward to the junction of the keyway branch and the first axial groove. In the axial projection, the groove depth of the keyway branch is greater than or equal to the groove depth of the settlement step. The keyway branch is opened in the same direction as the first circumferential groove. The second keyway includes an axially distributed second axial groove, and a second circumferential groove is opened at the bottom of the second axial groove along the circumferential direction. A first flaring groove is provided at the junction of the second axial groove and the second circumferential groove. In the axial projection, the second circumferential groove is opened in the same direction as the first circumferential groove.

2. A plug, characterized in that: It includes the head shell as described in claim 1, and also includes a connecting sleeve, a tail nut, a jack assembly, and a mounting plate, wherein the connecting sleeve is slidably installed on the head shell, a locking mechanism is provided on the connecting sleeve, and the connecting sleeve and the head shell are locked by the locking mechanism, the rear end of the jack assembly is sealed and installed in the rear end cavity of the head shell, the front end of the jack assembly is installed in the mounting plate, the mounting plate is located in the front end cavity of the head shell, and a tail nut is installed at the front end of the head shell, and the tail nut abuts against the front end surface of the mounting plate.

3. The plug according to claim 2, characterized in that: Taking the insertion direction of the head shell as the rear, the head shell includes, from the rear to the front, a first cylinder, a second cylinder, a third cylinder and a fourth cylinder which are connected in sequence, and the first keyway and the second keyway are both provided on the first cylinder.

4. The plug according to claim 3, characterized in that: The third cylinder is sleeved with a second spring, the front end of the connecting sleeve is slidably mounted on the fourth cylinder, and the third cylinder is located in the connecting sleeve, an inner convex ring is provided on the inner side of the rear end of the connecting sleeve, one end of the second spring abuts against the inner convex ring, and one end of the second spring abuts against the front end surface of the fourth cylinder, a convex key with an inclined surface is provided on the fourth cylinder, a guide groove corresponding to the convex key is provided at the front end of the connecting sleeve, and the convex key is located in the corresponding guide groove.

5. The plug according to claim 4, characterized in that: The inner convex ring is provided with a guide groove, and the third cylinder is provided with an outer convex guide key which is slidably matched with the guide groove.

6. The plug according to claim 2, characterized in that: An outer convex ring is provided in the middle of the jack assembly, an annular clamping groove is provided on the outer convex ring, and the rear end of the mounting plate is clamped in the annular clamping groove.

7. The plug according to claim 6, characterized in that: The mounting plate comprises a first semicircular plate and a second semicircular plate, and the rear ends of the first semicircular plate and the second semicircular plate are both provided with an inwardly protruding arc-shaped clamping block, and the arc-shaped clamping block is clamped in the annular clamping groove.

8. The plug according to any one of claims 2 to 7, characterized in that: The locking mechanism includes a lock core, which is provided with an arc-shaped groove, which matches the arc of the third cylinder of the shell, and a lock hole is horizontally provided on the connecting sleeve, which forms a through opening with the inner cavity of the connecting sleeve, and the arc-shaped groove is located at the through opening. A flat surface is provided at the rear end of the third cylinder, and when the arc-shaped groove faces the flat surface, the connecting sleeve and the head shell can slide relative to each other, and when the arc-shaped groove turns away from the flat surface, the connecting sleeve and the head shell are locked by the lock core.

9. The plug according to claim 8, characterized in that: The lock core comprises a rod body, the arc-shaped groove is provided on the rod body, a rotating head is provided at one end of the rod body, and a positioning reference is provided on the rotating head.

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