A quick-release joint assembly suitable for a dental three-purpose gun and a dental three-purpose gun

Abstract

The invention discloses a quick-release joint assembly suitable for a dental three-purpose gun and the dental three-purpose gun. The quick-release joint assembly comprises a plug body, a joint body and a locking assembly. The two ends of the plug body are divided into a first plug end and a second plug end, and the two ends of the joint body are divided into a first joint end and a second joint end. The second joint end and the first plug end are rotatably fitted to each other. The locking assembly comprises a locking block which moves to a locking position and an unlocking position as the joint body and the plug body rotate. The joint body is rotated until a joint water channel is connected to a plug water channel and a joint air channel is connected to a plug air channel. At this time, the locking block moves to the locking position to realize locking and fixing of the quick-release joint assembly in the three-purpose gun. The joint body is rotated to a non-working position in which a joint water outlet and a joint air outlet are respectively misaligned with a plug water inlet and a plug air inlet, and the water and air channels are both closed. At this time, the locking block moves to the unlocking position to avoid water and air spraying outwards due to failure to close the water and air channels when the quick-release joint assembly is disassembled.

Description

Technical Field

[0001] The invention relates to the field of dental medical equipment, in particular to a quick-release joint assembly suitable for a dental three-purpose gun and the dental three-purpose gun. Background Art

[0002] The dental three-in-one gun is a common device on the dental comprehensive treatment table. It is an important component of the dental treatment instrument. It can spray water and air, and is mainly used to clean the dirt left on the teeth or air-dry the teeth. By controlling the water and air switches, it can also produce water mist. The three-in-one guns on the market are directly connected to the water and air pipes. If disinfection is required, it is more troublesome and increases the workload of the doctor. When disassembling, cleaning and disinfecting, the dental treatment instrument needs to be stopped for operation. However, doctors often forget to turn off the water and air and disassemble the dental three-in-one gun, causing water and air to spray out, which is easy to misoperate. Summary of the invention

[0003] The object of the present invention is to provide a quick-release joint assembly suitable for a dental three-way gun and a dental three-way gun, so as to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0004] The technical solutions adopted to solve the above technical problems are:

[0005] First, the present invention provides a quick-release connector assembly suitable for a dental three-way gun, which comprises: a plug body, a connector body and a locking assembly, wherein the two ends of the plug body are divided into a first plug end and a second plug end, a plug water channel and a plug air channel are arranged inside the plug body, the plug water channel is provided with a plug water inlet arranged on the end face of the first plug end, and a plug water outlet arranged on the second plug end, the plug air channel is provided with a plug air inlet arranged on the end face of the first plug end, and a plug air outlet arranged on the second plug end, the plug air inlet and the plug water inlet are arranged on the side of the central axis of the end face of the first plug end; the two ends of the connector body are divided into a first connector end and a second connector end, the second connector end and the first plug end are rotatably coaxially sleeved with each other The connector body is assembled together, and a connector water channel and a connector air channel are arranged inside the connector body. The connector water channel is provided with a connector water inlet arranged at the first connector end and a connector water outlet arranged at the end surface of the second connector end, and the connector air channel is provided with a connector air inlet arranged at the first connector end and a connector air outlet arranged at the end surface of the second connector end; a locking assembly is arranged between the plug body and the connector body, and the locking assembly includes a locking block which moves to a locking position and an unlocking position as the connector body and the plug body rotate, the locking block in the locking position is locked and connected with the dental three-purpose gun so that the quick-release connector assembly is locked with the dental three-purpose gun, and the locking block in the unlocking position is separated from the dental three-purpose gun so that the quick-release connector assembly is unlocked with the dental three-purpose gun;

[0006] The joint body rotates relative to the plug body to a working position in which the joint water outlet and the joint air outlet are respectively connected to the plug water inlet and the plug air inlet, so that the joint water channel is connected to the plug water channel, the joint air channel is connected to the plug air channel, and the locking block is moved to the locking position;

[0007] The connector body is rotated relative to the plug body to a non-working position where the connector water outlet and the connector air outlet are respectively misaligned with the plug water inlet and the plug air inlet, so that the connector water channel is disconnected from the plug water channel, the connector air channel is disconnected from the plug air channel, and the locking block is moved to the unlocking position.

[0008] The beneficial effect of the quick-release connector assembly is that when in use, after the second plug end is inserted into the dental three-way gun, the connector body is rotated to the working position where the connector water outlet and the connector air outlet are respectively connected to the plug water inlet and the plug air inlet, at which time the connector water channel is connected to the plug water channel, the connector air channel is connected to the plug air channel, and the locking block moves to the locking position, and the locking block in the locking position is locked and connected to the dental three-way gun so that the quick-release connector assembly is locked with the dental three-way gun, thereby realizing the locking and fixation of the quick-release connector assembly in the dental three-way gun, and the connector water inlet and the connector air inlet are respectively connected to the water supply pipe and the air supply pipe of the dental treatment instrument; and when the quick-release connector assembly needs to be removed from the dental three-way gun When disassembling, there is no need to shut down the dental treatment instrument and disassemble the water supply pipe and the air supply pipe. At this time, the connector body is rotated to the non-working position where the connector water outlet and the connector air outlet are respectively misaligned with the plug water inlet and the plug air inlet. At this time, the connector water channel is disconnected from the plug water channel, and the connector air channel is disconnected from the plug air channel, that is, the water and air channels are both closed. At the same time, the locking block moves to the unlocking position, and the locking block in the unlocking position is separated from the dental three-way gun so that the quick-release connector assembly is unlocked from the dental three-way gun, thereby realizing the disassembly and separation of the quick-release connector assembly from the dental three-way gun. Such a design avoids the doctor's misoperation and avoids the misoperation of spraying water and air outward due to failure to close the water and air channels when disassembling the quick-release connector assembly.

[0009] As a further improvement of the above technical solution, a first sealing ring is provided between the water outlet of the joint and the water inlet of the plug, and between the air outlet of the joint and the air inlet of the plug.

[0010] The first sealing ring in the present solution can improve the sealing between the water outlet of the joint and the water inlet of the plug, and between the air outlet of the joint and the air inlet of the plug, thereby avoiding air and water leakage and facilitating rotation.

[0011] As a further improvement of the above technical solution, a sealing groove for installing the first sealing ring is provided on one end surface of the second plug end and the second connector end.

[0012] In this solution, the first sealing ring is installed in a limited position through the sealing groove to prevent the first sealing ring from shifting and blocking the water inlet or the air inlet during the rotation process.

[0013] As a further improvement of the above technical solution, the locking assembly further includes a locking rotating sleeve, the locking rotating sleeve is arranged between the second connector end and the first plug end, and one of the plug body and the connector body is fixedly connected to the locking rotating sleeve; in the plug body and the connector body, the one relatively fixed to the locking rotating sleeve is set as a fixed body, and the one relatively rotating to the locking rotating sleeve is set as a rotating body;

[0014] A position-limiting mounting hole for movably mounting the locking block is arranged on the outer peripheral wall of the locking rotating sleeve, the position-limiting mounting hole is arranged on the outer peripheral side of the rotating body, and a step surface corresponding to the position-limiting mounting hole is arranged on the outer peripheral wall of the rotating body, the step surface includes a concave step surface that is concave inwardly and a convex step surface that is convex outwardly relative to the concave step surface, and the concave step surface and the convex step surface are arranged in a circumferential annular arrangement;

[0015] During the rotation of the locking rotating sleeve, the raised step surface contacts the inner end of the locking block and pushes the outer end of the locking block to protrude outward from the limiting mounting hole, and the recessed step surface accommodates the inner end of the locking block, so that the outer end of the locking block retracts into the limiting mounting hole.

[0016] When the locking block passes through the concave step surface, the concave step surface accommodates the inner end of the locking block, which is equivalent to that there is no thrust to push the locking block outward at this time. At this time, the locking block moves back, so that the outer end of the locking block retracts into the limiting mounting hole, and the outer end of the locking block is separated from the dental three-way gun to achieve unlocking.

[0017] As a further improvement of the above technical solution, there are multiple locking blocks, and the multiple locking blocks are arranged in a ring-shaped manner along the outer circumference of the locking rotating sleeve.

[0018] In order to improve the firmness of locking, the present solution provides a plurality of locking blocks, and a plurality of corresponding limit mounting holes are also provided.

[0019] As a further improvement of the above technical solution, the locking block is a ball structure.

[0020] The locking block in this solution adopts a ball structure, which can achieve axial locking and positioning without affecting rotation, thereby avoiding the phenomenon of jamming.

[0021] As a further improvement of the above technical solution, the locking rotating sleeve and the fixed body are connected by a transversely arranged fixed shaft, a first fixing hole is arranged on the outer peripheral wall of the locking rotating sleeve, and a second fixing hole corresponding to the first fixing hole is arranged on the outer peripheral wall of the fixed body, the fixed shaft is inserted into the first fixing hole and the second fixing hole, the rotating body is connected with a transversely arranged limiting shaft, and a limiting step is arranged on the inner peripheral wall of the locking rotating sleeve, and the two ends of the limiting shaft extend out of the outer periphery of the rotating body and then conflict with the limiting step, and under the mutual conflict between the second connector end and the end face of the first plug end, the relative position of the locking rotating sleeve and the rotating body in the axial direction is locked and positioned.

[0022] This solution uses a fixed shaft to fix the locking rotating sleeve and the fixed body, which is easy to install. As for the axial positioning of the locking rotating sleeve and the rotating body, the axial positioning is achieved through the interference fit between the limit shaft and the limit step, and the interference fit between the second connector end and the first plug end.

[0023] As a further improvement of the above technical solution, two second sealing rings are sequentially sleeved on the outer peripheral side of the second plug end along the axial direction, and the plug water outlet and the plug air outlet are respectively arranged on both sides of the second sealing ring on the outside.

[0024] This solution uses two second sealing rings to isolate and seal the plug water outlet and the plug air outlet. The second sealing ring on the outside isolates the plug water outlet and the plug air outlet, while the other second sealing ring isolates the plug water outlet and the plug air outlet from the outside.

[0025] As a further improvement of the above technical solution, the joint water inlet and the joint air inlet are both connected with a connecting nozzle.

[0026] The water inlet and air inlet of the joint in this solution are both connected to the external pipeline through the connecting nozzle.

[0027] In addition, the present invention also provides a dental three-purpose gun, which includes the above-mentioned quick-release joint assembly and a gun body, wherein the gun body includes a machine head and a handle part that are connected to each other, a plug-in slot is provided at the lower end of the handle part, the second plug end is inserted from the notch of the plug-in slot so that the quick-release joint assembly is inserted into the handle part, a locking part that is locked and connected to a locking block is provided on the inner peripheral wall of the plug-in slot, the machine head is provided with a jet water channel and a jet air channel, the inlet of the jet water channel is connected to the water outlet of the plug, the inlet of the jet air channel is connected to the air outlet of the plug, the jet water channel is installed with a water spray button switch, the jet air channel is installed with an air jet button switch, and the machine head is also provided with a jet pipe that is simultaneously connected to the outlets of the jet water channel and the jet air channel.

[0028] When the dental three-in-one gun is in use, the quick-release joint assembly is inserted into the handle part, and the joint body is rotated so that the locking block and the locking part are locked and connected, so that the injection air channel is connected to the air channel in the quick-release joint assembly, and the injection water channel is connected to the water channel in the quick-release joint assembly. When disassembling, the joint body is also rotated to separate the locking block from the locking part, and at the same time the water and air channels in the quick-release joint assembly are closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described below in conjunction with the accompanying drawings and embodiments;

[0030] Figure 1 This is an exploded view of an embodiment of the quick-release connector assembly provided by the present invention;

[0031] Figure 2 It is a partial cross-sectional view of an embodiment of the quick-release connector assembly provided by the present invention inserted into the handle portion;

[0032] Figure 3 yes Figure 2 A partial enlarged view of part A;

[0033] Figure 4 This is a structural schematic diagram of a dental three-purpose gun provided by the present invention, in which a disassembly assembly of a joint in one embodiment is disassembled from a handle;

[0034] Figure 5 The present invention provides a dental three-purpose gun, in which a disassembly assembly of one embodiment is inserted into a handle portion. DETAILED DESCRIPTION

[0035] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0036] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 should not be understood as a limitation on the present invention.

[0037] In the description of the present invention, if there are words such as "several", it means one or more, "more" means more than two, greater than, less than, exceed, etc. are understood as not including the number, and above, below, within, etc. are understood as including the number.

[0038] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0039] Reference Figures 1 to 5 The dental three-purpose gun of the present invention is provided in the following embodiments:

[0040] like Figure 4 and Figure 5 As shown, the dental three-in-one gun of this embodiment includes a quick-release joint assembly and a gun body 800, wherein the gun body 800 includes a head portion 810 and a handle portion 820 that are interconnected, the head portion 810 is provided with a jet water channel and a jet air channel, the jet water channel is equipped with a water spray button switch 811, the jet air channel is equipped with an air jet button switch 812, and the head portion 810 is also provided with a jet pipe 813 that is connected to the outlets of the jet water channel and the jet air channel at the same time.

[0041] like Figure 2 As shown, the lower end of the handle portion 820 is provided with a plug-in slot 821 for inserting the quick-release connector assembly. Figures 1 to 4 As shown, the quick-release connector assembly of this embodiment includes a plug body 100, a connector body 200 and a locking assembly, and the two ends of the plug body 100 are divided into a first plug end 110 and a second plug end 120. The plug body 100 is provided with a plug water channel 130 and a plug air channel 140. The plug water channel 130 is provided with a plug water inlet 131 arranged on the end face of the first plug end 110 and a plug water outlet 132 arranged on the second plug end 120. The plug air channel 140 is provided with a plug air inlet 141 arranged on the end face of the first plug end 110 and a plug air outlet 142 arranged on the second plug end 120. The plug air inlet 141 and the plug water inlet 131 are arranged on the side of the central axis of the end face of the first plug end 110.

[0042] In addition, two second sealing rings 121 are sleeved on the outer peripheral side of the second plug end 120 at intervals in the axial direction, and the plug water outlet 132 and the plug air outlet 142 are respectively arranged on both sides of the second sealing ring 121 on the outside, and the plug water outlet 132 and the plug air outlet 142 are isolated and sealed by the two second sealing rings 121. The second sealing ring 121 on the outside isolates the plug water outlet 132 and the plug air outlet 142, and the other second sealing ring 121 isolates the plug water outlet 132 and the plug air outlet 142 from the outside. When plugged in, the inlet of the jet water channel is connected to the plug water outlet 132, and the inlet of the jet air channel is connected to the plug air outlet 142.

[0043] The two ends of the joint body 200 are divided into a first joint end 210 and a second joint end 220. A joint water channel 230 and a joint air channel 240 are arranged inside the joint body 200. The joint water channel 230 is provided with a joint water inlet 231 arranged at the first joint end 210 and a joint water outlet 232 arranged at the end surface of the second joint end 220. The joint air channel 240 is provided with a joint air inlet 241 arranged at the first joint end 210 and a joint air outlet 242 arranged at the end surface of the second joint end 220.

[0044] The joint water inlet 231 and the joint air inlet 241 of the present embodiment are both connected with a connecting nozzle 700 , and the joint water inlet 231 and the joint air inlet 241 of the present embodiment are both connected with the water supply pipe and the air supply pipe of the dental treatment instrument through the connecting nozzle 700 .

[0045] The second connector end 220 and the first plug end 110 in this embodiment are rotatably coaxially mounted together. Specifically: the locking assembly in this embodiment includes a locking rotating sleeve 500, which is mounted between the second connector end 220 and the first plug end 110, so as to achieve rotational cooperation between the second connector end 220 and the first plug end 110, and one of the plug body 100 and the connector body 200 is fixedly connected to the locking rotating sleeve 500. The locking rotating sleeve 500 of this embodiment is relatively fixedly arranged with the connector body 200. In some other embodiments, the locking rotating sleeve 500 may also be relatively fixedly arranged with the plug body 100.

[0046] In addition, the locking assembly includes a locking block 300 that moves to a locking position and an unlocking position as the connector body 200 and the plug body 100 rotate. The locking block 300 has the following functions: the locking block 300 in the locking position is locked and connected to the handle portion 820 so that the quick-release connector assembly is locked with the handle portion 820, and the locking block 300 in the unlocking position is separated from the handle portion 820 so that the quick-release connector assembly is unlocked with the handle portion 820. That is, the connector body 200 rotates relative to the plug body 100 until the connector water outlet 232 and the connector air outlet 242 are respectively connected to the plug water inlet 131 and the plug air inlet 132. The plug air inlet 141 is arranged in a one-to-one working position, so that the joint water channel 230 is connected with the plug water channel 130, the joint air channel 240 is connected with the plug air channel 140, and the locking block 300 is moved to the locking position; the joint body 200 is rotated relative to the plug body 100 to the non-working position where the joint water outlet 232 and the joint air outlet 242 are respectively misaligned with the plug water inlet 131 and the plug air inlet 141, so that the joint water channel 230 is disconnected from the plug water channel 130, the joint air channel 240 is disconnected from the plug air channel 140, and the locking block 300 is moved to the unlocking position.

[0047] Specifically: a limiting mounting hole 510 for movably mounting the locking block 300 is arranged on the outer peripheral wall of the locking rotating sleeve 500, and the limiting mounting hole 510 is arranged on the outer peripheral side of the plug body 100, and a step surface corresponding to the limiting mounting hole 510 is arranged on the outer peripheral wall of the plug body 100, and the step surface includes a concave step surface 600 that is concave inwardly and a convex step surface 610 that is convex outwardly relative to the concave step surface 600, and the concave step surface 600 and the convex step surface 610 are arranged in a circumferential ring, so that the locking rotating sleeve 500 can drive the locking block 300 to move, and a locking portion 822 that is locked and connected to the locking block 300 is arranged on the inner peripheral wall of the plug-in slot 821, and the locking portion 822 in this embodiment is an annular card groove structure.

[0048] Among them, the locking block 300 of this embodiment is a ball structure, which can achieve axial locking and positioning, but does not affect the rotation, thereby avoiding the phenomenon of jamming.

[0049] In order to improve the sealing between the joint water outlet 232 and the plug water inlet 131, and between the joint air outlet 242 and the plug air inlet 141, a first sealing ring 400 is provided between the joint water outlet 232 and the plug water inlet 131, and between the joint air outlet 242 and the plug air inlet 141 to avoid air and water leakage and facilitate rotation.

[0050] Furthermore, a sealing groove 221 for installing the first sealing ring 400 is provided on one end face of the second plug end 120 and the second connector end 220, and the first sealing ring 400 is installed in a limited position through the sealing groove 221 to prevent the first sealing ring 400 from shifting and blocking the water inlet or the air inlet during rotation.

[0051] When in use, after the second plug end 120 is inserted into the plug slot 821, the connector body 200 is rotated to the working position where the connector water outlet 232 and the connector air outlet 242 are respectively connected to the plug water inlet 131 and the plug air inlet 141. At this time, the connector water channel 230 is connected to the plug water channel 130, and the connector air channel 240 is connected to the plug air channel 140, so that the jet air channel is connected to the air channel in the quick-release connector assembly, and the jet water channel is connected to the water channel in the quick-release connector assembly. During the rotation of the locking rotating sleeve 500, the locking block 300 rotates with the locking rotating sleeve 500. When the locking block 300 passes through the raised step surface 610, the raised step surface 610 contacts the inner end of the locking block 300 and pushes the outer end of the locking block 300 to protrude outward from the limiting mounting hole 510, so that the outer end of the locking block 300 can be snap-connected and locked with the locking portion 822.

[0052] When the quick-release connector assembly needs to be removed from the plug slot 821, there is no need to shut down the dental treatment instrument and disassemble the water supply pipe and the air supply pipe. At this time, the connector body 200 is rotated to a non-working position where the connector water outlet 232 and the connector air outlet 242 are respectively misaligned with the plug water inlet 131 and the plug air inlet 141. At this time, the connector water channel 230 is disconnected from the plug water channel 130, and the connector air channel 240 is disconnected from the plug air channel 140, that is, the water and air channels are both closed, and the locking block 300 will rotate to the recessed stepped surface. 600, the recessed stepped surface 600 accommodates the inner end of the locking block 300, which is equivalent to that there is no thrust to push the locking block 300 outward at this time. At this time, the locking block 300 moves back, so that the outer end of the locking block 300 retracts into the limiting mounting hole 510, and the outer end of the locking block 300 is separated from the locking portion 822 to achieve unlocking, thereby achieving the disassembly and separation of the quick-release connector assembly and the plug-in slot 821. This design avoids the doctor's misoperation and avoids the misoperation of spraying water and air outward due to failure to close the water and air channels when disassembling the quick-release connector assembly.

[0053] In some embodiments, in order to improve the firmness of locking, the number of the locking blocks 300 is multiple, and the multiple locking blocks 300 are arranged in annular intervals along the outer circumference of the locking rotating sleeve 500, and the corresponding limiting installation holes 510 are also arranged in multiples. In this embodiment, two locking blocks 300 are arranged.

[0054] In this embodiment, the locking rotating sleeve 500 is connected to the joint body 200 by a transversely arranged fixed shaft 520, a first fixed hole 530 is arranged on the outer peripheral wall of the locking rotating sleeve 500, and a second fixed hole 250 corresponding to the first fixed hole 530 is arranged on the outer peripheral wall of the joint body 200, and the fixed shaft 520 is inserted into the first fixed hole 530 and the second fixed hole 250.

[0055] The plug body 100 is connected to a transversely arranged limit shaft 150, and the inner wall of the locking rotating sleeve 500 is provided with a limit step 540. The two ends of the limit shaft 150 extend out of the outer periphery of the plug body 100 and abut against the limit step 540, and under the mutual abutment between the second connector end 220 and the end face of the first plug end 110, the relative position of the locking rotating sleeve 500 and the plug body 100 in the axial direction is locked and positioned.

[0056] When the dental three-purpose gun of this embodiment is in use, the quick-release joint assembly is inserted into the handle portion 820, and the joint body 200 is rotated so that the locking block 300 is locked and connected with the locking portion 822, so that the injection air channel is connected to the air channel in the quick-release joint assembly, and the injection water channel is connected to the water channel in the quick-release joint assembly. When disassembling, the joint body 200 is also rotated to separate the locking block 300 from the locking portion 822, and at the same time, the water and air channels in the quick-release joint assembly are closed.

[0057] The preferred embodiments of the present invention are specifically described above, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A quick-release joint assembly suitable for a dental three-in-one gun, characterized in that: It includes: A plug body (100) having two ends divided into a first plug end (110) and a second plug end (120); a plug water channel (130) and a plug air channel (140) are arranged inside the plug body (100); the plug water channel (130) is provided with a plug water inlet (131) arranged at the end surface of the first plug end (110) and a plug water outlet (132) arranged at the second plug end (120); the plug air channel (140) is provided with a plug air inlet (141) arranged at the end surface of the first plug end (110) and a plug air outlet (142) arranged at the second plug end (120); the plug air inlet (141) and the plug water inlet (131) are arranged beside the central axis of the end surface of the first plug end (110); A joint body (200), whose two ends are divided into a first joint end (210) and a second joint end (220), the second joint end (220) and the first plug end (110) being rotatably coaxially sleeved together, a joint water channel (230) and a joint air channel (240) being arranged inside the joint body (200), the joint water channel (230) being provided with a joint water inlet (231) arranged at the first joint end (210) and a joint water outlet (232) arranged at the end surface of the second joint end (220), and the joint air channel (240) being provided with a joint air inlet (241) arranged at the first joint end (210) and a joint air outlet (242) arranged at the end surface of the second joint end (220); A locking assembly, which is arranged between the plug body (100) and the connector body (200), the locking assembly comprising a locking block (300) which moves to a locking position and an unlocking position as the connector body (200) and the plug body (100) rotate, the locking block (300) in the locking position being locked and connected to the dental three-way gun so that the quick-release connector assembly and the dental three-way gun are locked, and the locking block (300) in the unlocking position being separated from the dental three-way gun so that the quick-release connector assembly and the dental three-way gun are unlocked; The joint body (200) is rotated relative to the plug body (100) to a working position where the joint water outlet (232) and the joint air outlet (242) are respectively connected to the plug water inlet (131) and the plug air inlet (141) one by one, so that the joint water channel (230) is connected to the plug water channel (130), the joint air channel (240) is connected to the plug air channel (140), and the locking block (300) is moved to the locking position; The joint body (200) rotates relative to the plug body (100) to a non-working position in which the joint water outlet (232) and the joint air outlet (242) are respectively misaligned with the plug water inlet (131) and the plug air inlet (141), so that the joint water channel (230) is disconnected from the plug water channel (130), the joint air channel (240) is disconnected from the plug air channel (140), and the locking block (300) is moved to the unlocking position; A first sealing ring (400) is provided between the joint water outlet (232) and the plug water inlet (131), and between the joint air outlet (242) and the plug air inlet (141); The locking assembly further comprises a locking rotating sleeve (500), the locking rotating sleeve (500) being sleeved between the second connector end (220) and the first plug end (110), and one of the plug body (100) and the connector body (200) being fixedly connected to the locking rotating sleeve (500); in the plug body (100) and the connector body (200), the one fixed relative to the locking rotating sleeve (500) is set as a fixed body, and the one rotating relative to the locking rotating sleeve (500) is set as a rotating body; A position-limiting mounting hole (510) for movably mounting the locking block (300) is provided on the outer peripheral wall of the locking rotating sleeve (500), the position-limiting mounting hole (510) being provided on the outer peripheral side of the rotating body, a step surface corresponding to the position-limiting mounting hole (510) is provided on the outer peripheral wall of the rotating body, the step surface comprising a concave step surface (600) that is concave inwardly and a convex step surface (610) that is convex outwardly relative to the concave step surface (600), the concave step surface (600) and the convex step surface (610) being arranged in a circular manner along the circumferential direction; During the rotation of the locking rotating sleeve (500), the raised stepped surface (610) contacts the inner end of the locking block (300) and pushes the outer end of the locking block (300) to protrude outward from the limiting mounting hole (510), and the recessed stepped surface (600) accommodates the inner end of the locking block (300) so that the outer end of the locking block (300) retracts into the limiting mounting hole (510).

2. A quick-release joint assembly suitable for a dental three-in-one gun according to claim 1, characterized in that: A sealing groove (221) for mounting the first sealing ring (400) is provided on one end surface of the second plug end (120) and the second connector end (220).

3. A quick-release joint assembly suitable for a dental three-in-one gun according to claim 1, characterized in that: There are a plurality of locking blocks (300), and the plurality of locking blocks (300) are arranged at intervals in a ring shape along the outer circumference of the locking rotating sleeve (500).

4. A quick-release joint assembly suitable for a dental three-in-one gun according to claim 1, characterized in that: The locking block (300) is a ball structure.

5. The quick-release joint assembly for a dental three-in-one gun according to claim 1, characterized in that: The locking rotating sleeve (500) is connected to the fixed body via a transversely arranged fixed shaft (520); a first fixed hole (530) is arranged on the outer peripheral wall of the locking rotating sleeve (500); a second fixed hole (250) corresponding to the first fixed hole (530) is arranged on the outer peripheral wall of the fixed body; the fixed shaft (520) is inserted into the first fixed hole (530) and the second fixed hole (250); the rotating body is connected to a transversely arranged limiting shaft (150); a limiting step (540) is arranged on the inner peripheral wall of the locking rotating sleeve (500); both ends of the limiting shaft (150) extend out of the outer periphery of the rotating body and then contact with the limiting step (540); and under the mutual contact between the end faces of the second connector end (220) and the first plug end (110), the relative positions of the locking rotating sleeve (500) and the rotating body in the axial direction are locked and positioned.

6. A quick-release joint assembly suitable for a dental three-in-one gun according to claim 1, characterized in that: Two second sealing rings (121) are sleeved in sequence and spaced apart along the axial direction on the outer peripheral side of the second plug end (120); the plug water outlet (132) and the plug air outlet (142) are respectively arranged on both sides of the second sealing ring (121) located on the outside.

7. A quick-release joint assembly suitable for a dental three-in-one gun according to claim 1, characterized in that: The joint water inlet (231) and the joint air inlet (241) are both connected to a connection nozzle (700).

8. A dental three-in-one gun, characterized by: It comprises a quick-release connector assembly as claimed in any one of claims 1 to 7, and also comprises a gun body (800), wherein the gun body (800) comprises a machine head (810) and a handle (820) which are connected to each other, wherein a plug slot (821) is provided at the lower end of the handle (820), and the second plug end (120) is inserted from the notch of the plug slot (821) so that the quick-release connector assembly is inserted into the handle (820), and a locking block ( 300) is locked with a locking portion (822), the machine head (810) is provided with a water jet channel and an air jet channel, the inlet of the water jet channel is connected to the plug water outlet (132), the inlet of the air jet channel is connected to the plug air outlet (142), the water jet channel is equipped with a water jet button switch (811), the air jet channel is equipped with an air jet button switch (812), and the machine head (810) is also provided with a jet pipe (813) connected to the outlets of the water jet channel and the air jet channel at the same time.

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