Snap-locking connector
The present invention discloses a snap-locking connector, which includes a locking block, a connecting sleeve, an upper housing assembly, a locking snap ring, and a lower housing assembly. An upper valve core is elastically arranged in the upper housing assembly, with a first sealing ring provided on the upper valve core. A push rod and a lower valve core are provided in the lower housing assembly, with the lower valve core sleeved on the outer side wall of one side of the push rod, and a second sealing ring arranged on the push rod. In this invention, the upper housing assembly compresses the lower housing assembly and the push rod abuts against the upper valve core. The locking block snaps into the upper housing assembly for position fixation, and the locking snap ring further secures the locking block. This design ensures a sealed connection between the upper and lower housing assemblies, with the push rod tightly abutting the upper valve core without any gap, while also preventing the locking block from unintentionally unlocking. For disassembly, the locking snap ring is loosened, the locking block is moved, and the upper housing assembly automatically pops out. At the same time, the sealing rings seal the connected area, achieving leak-free disassembly.
1 . A snap-locking connector, comprising
a connecting sleeve ( 1 ) movably provided with a locking block ( 11 ),
an upper housing assembly snap-fitted with the locking block ( 11 ),
a locking snap ring ( 12 ) adjustably sleeved on an outer side of the connecting sleeve ( 1 ) and abutting against the locking block ( 11 ) to provide positional restriction, and
a lower housing assembly detachably connected to the connecting sleeve ( 1 );
wherein an upper valve core ( 2 ) is elastically disposed within the upper housing assembly, and a first sealing ring ( 20 ) is provided on the upper valve core ( 2 ); the lower housing assembly contains a push rod ( 50 ) and a lower valve core ( 5 ) elastically mounted, the lower valve core ( 5 ) is sleeved on an outer side wall of one side of the push rod ( 50 ); a second sealing ring ( 51 ) is arranged at a corresponding sleeving position on the push rod ( 50 ); in use, the upper housing assembly presses against the lower valve core ( 5 ), causing the push rod ( 50 ) to push the upper valve core ( 2 ) outward, thereby establishing communication between the upper housing assembly and lower housing assembly; the locking block ( 11 ) snaps into the upper housing assembly to restrict movement, and the locking snap ring ( 12 ) is adjusted along the outer side of the connecting sleeve ( 1 ) to abut and secure the locking block ( 11 ); for disassembly, the locking snap ring ( 12 ) is moved away, the locking block ( 11 ) is pressed to release a snap position, and under elastic force, the upper valve core ( 2 ) is pushed back by the push rod ( 50 ); a liquid outlet end of the upper housing assembly seals against the first sealing ring ( 20 ), while the second sealing ring ( 51 ) seals against a liquid outlet end of the lower housing assembly;
wherein one side of the connecting sleeve ( 1 ) is provided with a connecting boss ( 10 ), while an other side of the connecting sleeve ( 1 ) is provided with a fixed boss ( 100 ) that abuts against and limits a position of the locking snap ring ( 12 ); a through hole communicating with the connecting sleeve ( 1 ) is formed in the connecting boss ( 10 ), within which a locking block ( 11 ) is disposed; an open slot ( 101 ) is formed in the connecting boss ( 10 ) at a position corresponding to the locking block ( 11 ), and a positioning groove ( 102 ) is formed at an lower end of a slot opening in the connecting boss ( 10 ); the locking block ( 11 ) is provided with a clearance hole ( 111 ) that communicates with the through hole, and one side of an opening of the clearance hole ( 111 ) is provided with a clearance slope ( 112 ); one side of the locking block ( 11 ) is provided with an extension section ( 113 ) that extends out of the connecting boss ( 10 ); two positioning lugs ( 114 ) are symmetrically arranged on an inner side wall of the extension section ( 113 ); a first placement groove ( 115 ) is provided at a position between the two positioning lugs ( 114 ); a first guide post ( 131 ) is disposed within the first placement groove ( 115 ), and a return spring ( 14 ) is sleeved on an outside of the first guide post ( 131 ); one end of the return spring ( 14 ) abuts against a bottom of the first placement groove ( 115 ), and an other end of the return spring ( 14 ) extends outward to abut against a corresponding position on the connecting sleeve ( 1 ).
2 . The snap-locking connector according to claim 1 , wherein a positioning protrusion ( 121 ) is provided on one side of the locking snap ring ( 12 ) at a position corresponding to the positioning groove ( 102 ), and an open through-slot ( 120 ) is provided on an other side of the locking snap ring ( 12 ); at a slot opening of the open through-slot ( 120 ), at positions corresponding to the positioning lugs ( 114 ), stop protrusions ( 122 ) are respectively provided; each stop protrusion ( 122 ) has a vertically oriented “V”-shaped through-slot ( 124 ) running through an inner side wall of the locking snap ring ( 12 ); an outer side wall of the stop protrusion ( 122 ) on a corresponding end fits against an outer side wall of the positioning lug ( 114 ); an opening is further provided on an outer wall of the locking snap ring ( 12 ), and a tab ( 123 ) is integrally connected within the opening; a limiting bump ( 17 ) is formed on an inner wall of the tab ( 123 ); between left and right ends of the tab ( 123 ) and a opening wall, a first strip groove ( 141 ) is formed on each side; a second strip groove ( 142 ) is formed between a non-connected end of the tab ( 123 ) and a wall of the opening; two ends of the second strip groove ( 142 ) are respectively connected to the two first strip grooves ( 141 ); a first protrusion ( 143 ) is formed on an outer wall of the connecting sleeve ( 1 ), in close contact with the inner wall of the locking snap ring ( 12 ), and a second protrusion ( 144 ) is provided at a position corresponding to the second strip groove ( 142 ); a lower end surface of the second protrusion ( 144 ) fits against an upper end surface of the limiting bump ( 17 ); at a positions on the connecting sleeve ( 1 ) corresponding to the stop protrusions ( 122 ), third protrusions ( 145 ) are provided, which extend into the “V”-shaped through-slots ( 124 ) to limit movement, thereby preventing the locking snap ring ( 12 ) from rotating or shifting on the connecting sleeve ( 1 ).
3 . The snap-locking connector according to claim 2 , wherein a second placement groove ( 116 ) is formed on an outer side wall of the connecting sleeve ( 1 ) at a position corresponding to the open through-slot ( 120 ); a second guide post ( 132 ) is disposed within the second placement groove ( 116 ), and an extended end of the return spring ( 14 ) is sleeved on an outer side of the second guide post ( 132 ), with one end abutting against a bottom of the second placement groove ( 116 ).
4 . The snap-locking connector according to claim 3 , wherein beveled sections ( 18 ) are provided on both the second protrusion ( 144 ) and the limiting bump ( 17 ) to facilitate the displacement of the locking snap ring ( 12 ).
5 . The snap-locking connector according to claim 1 , wherein the upper housing assembly comprises a male plug sleeve ( 4 ), in which a placement hole ( 401 ) is axially formed through the male plug sleeve ( 4 ); one end of an outer side of the male plug sleeve ( 4 ) is provided with an orientation boss ( 41 ), and an other end is provided with a limiting boss ( 40 ); a limiting groove ( 42 ) is formed on the male plug sleeve ( 4 ) between the orientation boss ( 41 ) and the limiting boss ( 40 ); a first compression spring ( 61 ) is disposed within the placement hole ( 401 ), with one end fixedly connected to a retaining ring ( 402 ) secured inside the placement hole ( 401 ), and an other end fixedly connected to the upper valve core ( 2 ); a first sealing ring ( 20 ) is embedded on an outer wall of the upper valve core ( 2 ), and an outer wall of the first sealing ring ( 20 ) is fitted against an inner wall of the placement hole ( 401 ); during installation, the male plug sleeve ( 4 ) is inserted into the connecting sleeve ( 1 ) and passes through the locking block ( 11 ) via the clearance hole ( 111 ); an upper end surface of the limiting boss ( 40 ) abuts against a lower end surface of the locking block ( 11 ), thus enabling the locking block ( 11 ) to lock and position the male plug sleeve ( 4 ).
6 . The snap-locking connector according to claim 5 , wherein a transition slope ( 21 ) is formed around an outer side wall of the upper valve core ( 2 ), and a limiting slope ( 403 ) is provided on an inner wall of the placement hole ( 401 ) at a position corresponding to the transition slope ( 21 ); the limiting slope ( 403 ) is fitted against the transition slope ( 21 ), such that an end face of a non-connection end of the upper valve core ( 2 ) is flush with an end face of a corresponding opening of the placement hole ( 401 ).
7 . The snap-locking connector according to claim 1 , wherein the lower housing assembly further comprises a female plug sleeve ( 7 ) threadably connected to the connecting sleeve ( 1 ); a stepped hole ( 15 ) is formed inside the connecting sleeve ( 1 ), and a push rod ( 50 ) is fixed inside the female plug sleeve ( 7 ), extending into a smaller diameter end of the stepped hole ( 15 ); an inserted end of the push rod ( 50 ) is sleeved within the orientation hole ( 53 ) of the lower valve core ( 5 ); an installation groove ( 71 ) is formed inside the female plug sleeve ( 7 ) at a position corresponding to its connection with the connecting sleeve ( 1 ); an installation ring ( 54 ) is connected to one end of the push rod ( 50 ) and sleeved and fixed inside the installation groove ( 71 ); a second compression spring ( 62 ) is also sleeved around an outer side of the push rod ( 50 ); a circumferential connecting lug ( 52 ) is arranged on one side of the lower valve core ( 5 ); one end of the second compression spring ( 62 ) abuts against a lower end surface of the connecting lug ( 52 ), while an other end abuts against an inner wall of the installation ring ( 54 ); a second sealing ring ( 51 ) is embedded in an outer wall of the push rod ( 50 ), with an outer wall of the second sealing ring ( 51 ) fitted against an inner wall of the orientation hole ( 53 ).
8 . The snap-locking connector according to claim 7 , wherein a transition hole ( 16 ) is formed between the through hole and the stepped hole ( 15 ) to provide communication between them; a sleeve ( 3 ) is sleeved around an outer side of the second compression spring ( 62 ), extending into a larger-diameter end of the stepped hole ( 15 ); from top to bottom, an end face of the inserted end of the sleeve ( 3 ) and a bottom of the stepped hole ( 15 ) are sequentially stacked with an upper sealing ring ( 63 ), an isolation ring ( 60 ), and a lower sealing ring ( 64 ); an upper end surface of the upper sealing ring ( 63 ) abuts against the bottom of the stepped hole ( 15 ), and an lower end surface of the lower sealing ring ( 64 ) abuts against an end face of an inserted end of the sleeve ( 3 ); the isolation ring ( 60 ) is sleeved around an outer side of the lower valve core ( 5 ); an outer end surface of the sleeve ( 3 ) abuts against an inner wall of the installation ring ( 54 ).
9 . The snap-locking connector according to claim 8 , wherein a step surface of the stepped hole ( 15 ) has an inclined structure that is narrower at a top and wider at a bottom; a first positioning slope ( 171 ) is provided on an outer side wall of the sleeve ( 3 ) at a position corresponding to the step surface of the stepped hole ( 15 ); a second positioning slope ( 172 ) is provided on an inner side wall of the sleeve ( 3 ) at a position corresponding to the first positioning slope ( 171 ); during installation, the sleeve ( 3 ) is inserted into the stepped hole ( 15 ), with an end face of the inserted end of the sleeve ( 3 ) abutting a lower end surface of the lower sealing ring ( 64 ); the first positioning slope ( 171 ) fits against the step surface of the stepped hole ( 15 ), and the second positioning slope ( 172 ) fits against an upper end surface of the connecting lug ( 52 ).
10 . The snap-locking connector according to claim 1 , wherein the locking snap ring ( 12 ) is rotatable on the connecting sleeve ( 1 ) but not axially movable, and an outer wall of the locking snap ring ( 12 ) is provided with a stop protrusion ( 120 ′) that can press between the extension section ( 113 ) and the locking snap ring ( 12 ).
11 . The snap-locking connector according to claim 10 , wherein the locking snap ring ( 12 ) and the connecting sleeve ( 1 ) are equipped with an anti-rotation structure, which prevents the locking snap ring ( 12 ) from rotating when the stop protrusion ( 120 ′) is pressed between the extension section ( 113 ) and the locking snap ring ( 12 ).
12 . The snap-locking connector according to claim 11 , wherein the anti-rotation structure includes an elastic tab ( 121 ′) provided on the locking snap ring ( 12 ), an inner wall of which has a protrusion, and the outer wall of the connecting sleeve ( 1 ) has a rib ( 100 ′) adapted to the protrusion.
13 . The snap-locking connector according to claim 10 , wherein an inner wall of the extension section ( 113 ) has a second arc surface ( 102 ′), and the stop protrusion ( 122 ′) is provided with a first arc surface ( 102 ′) adapted to the second arc surface ( 102 ′).
14 . The snap-locking connector according to claim 10 , wherein the locking snap ring ( 12 ) is further provided with an opening ( 125 ′) for accommodating the return spring ( 14 ), and corresponding markings ( 126 ′) are provided on both the extension section ( 113 ) and the locking snap ring ( 12 ) for alignment.
15 . The snap-locking connector according to claim 11 , wherein the anti-rotation structure further includes a first boss ( 123 ′) on the locking snap ring ( 12 ) and a second boss ( 101 ′) on the connecting sleeve ( 1 ), which tightly engage when the stop protrusion ( 120 ′) is pressed between the extension section ( 113 ′) and the locking snap ring ( 12 ).