Plug and coupling assembly

Abstract

A plug has a cavity and a front opening and a rear opening located at opposite ends of the cavity. The plug includes a plug body, a rear terminal, and a piston. The plug body includes an annular hook protruding from its outer surface. The front opening defines the front end face of the plug body. The rear terminal connects to the plug body. The rear opening is located at the end of the rear terminal away from the plug body. The piston is disposed in the cavity. The piston includes a piston body, a plug head, and two extensions. The piston body has a tapered surface. The plug head is disposed on the piston body. The two extensions are located on opposite sides of the piston body. The two extensions extend from the tapered surface of the piston body away from the plug head. A notch is defined between the two extensions on the side of the piston body away from the plug head.

Description

Technical Field

[0001] This disclosure relates to a plug and coupling assembly, and more particularly to a quick-release plug and coupling assembly. Prior Technology

[0002] For servers, improving cooling performance has become a key objective. In particular, the increasing heat dissipation rate of water cooling has led to a growing demand from manufacturers to incorporate water cooling systems. Quick-release water cooling connectors are crucial components in water cooling systems. However, these connectors are the most prone to leakage within the entire system. Furthermore, there is currently no coupling assembly that simultaneously ensures a tight seal between the connectors (i.e., the tube socket and the tube plug) and effectively reduces fluid resistance.

[0003] Therefore, how to propose a plug and coupling assembly that can solve the above problems is one of the issues that the industry is currently eager to address by investing research and development resources. Summary of the Invention

[0004] In view of this, one of the purposes of this disclosure is to provide a plug and coupling assembly that can solve the above problems.

[0005] To achieve the above objectives, according to one embodiment of this disclosure, a plug has a cavity and a front opening and a rear opening located at opposite ends of the cavity. The plug includes a plug body, a rear terminal, and a piston. The plug body includes an annular hook protruding from its outer surface. The front opening defines the front end face of the plug body. The rear terminal connects to the plug body. The rear opening is located at the end of the rear terminal away from the plug body. The piston is disposed in the cavity. The piston includes a piston body, a plug head, and two extensions. The piston body has a conical surface. The plug head is disposed on the piston body. The two extensions are located on opposite sides of the piston body. The two extensions extend from the conical surface of the piston body away from the plug head. A notch is defined between the two extensions on the side of the piston body away from the plug head.

[0006] In one or more embodiments disclosed herein, the plug further includes a label ring disposed on the rear terminal of the plug. The label ring is located between the rear terminal of the plug and the plug body.

[0007] In one or more embodiments disclosed herein, the label ring includes a ring body, a protrusion, and an inner protrusion. The protrusion projects outward from the ring body. The inner protrusion projects inward from the ring body. The protrusion of the label ring defines the maximum diameter of the plug.

[0008] In one or more embodiments disclosed herein, the piston head has a front surface at one end of the head away from the piston body. The front surface of the head extends parallel to the front end face of the plug body.

[0009] In one or more embodiments disclosed herein, the plug body further has an annular engaging groove located behind the annular hook.

[0010] In one or more embodiments disclosed herein, the diameter of the annular engaging groove is smaller than the diameter of the plug body.

[0011] In one or more embodiments disclosed herein, the plug further includes a spring. The two ends of the spring abut against the piston and the rear terminal of the plug, respectively.

[0012] In one or more embodiments disclosed herein, the plug further includes a first rubber ring disposed in the piston groove of the plug head. The first rubber ring contacts the inner surface of the plug body.

[0013] In one or more embodiments disclosed herein, the tube plug further includes a second rubber ring disposed in a receiving groove outside the tube plug body. The second rubber ring contacts the rear terminal of the tube plug.

[0014] In one or more embodiments disclosed herein, the external receiving groove is recessed from the outer surface of the plug body.

[0015] To achieve the above objectives, according to one embodiment of this disclosure, a coupling assembly includes a plug and a seat. The seat is coupled to the plug. The plug has a cavity and a front opening and a rear opening located at opposite ends of the cavity. The plug includes a plug body, a plug rear terminal, and a piston. The plug body includes an annular hook protruding from the outer surface of the plug body. The front opening defines the front end face of the plug body. The plug rear terminal connects to the plug body. The rear opening is located at the end of the plug rear terminal away from the plug body. The piston is disposed in the cavity. The piston includes a piston body, a plug head, and two extensions. The piston body has a tapered surface. The plug head is disposed on the piston body. The two extensions are disposed on opposite sides of the piston body. The two extensions extend from the tapered surface of the piston body away from the plug head. A notch is defined between the two extensions on the side of the piston body away from the plug head. The seat includes a seat body, a retainer, a sleeve, and a rod. The seat body accommodates the plug body. The retainer is movably disposed on the seat body. The retaining ring is located inside the tube seat body. The sleeve is located within the tube seat body. The tube plug body abuts against the sleeve. The rod is located within the tube seat body. The sleeve surrounds the rod. The piston abuts against the rod.

[0016] In one or more embodiments disclosed herein, the plug further includes a label ring disposed on the rear terminal of the plug. The label ring is located between the rear terminal of the plug and the plug body.

[0017] In one or more embodiments disclosed herein, the label ring includes a ring body, a protrusion, and an inner protrusion. The protrusion projects outward from the ring body. The inner protrusion projects inward from the ring body. The protrusion of the label ring defines the maximum diameter of the plug.

[0018] In one or more embodiments disclosed herein, the piston head has a front surface at one end of the head away from the piston body. The front surface of the head extends parallel to the front end face of the plug body.

[0019] In one or more embodiments disclosed herein, the plug body further has an annular engaging groove located behind the annular hook.

[0020] In one or more embodiments disclosed herein, the diameter of the annular engaging groove is smaller than the diameter of the plug body.

[0021] In one or more embodiments disclosed herein, the plug further includes a spring. The two ends of the spring abut against the piston and the rear terminal of the plug, respectively.

[0022] In one or more embodiments disclosed herein, the plug further includes a first rubber ring disposed in the piston groove of the plug head. The first rubber ring contacts the inner surface of the plug body.

[0023] In one or more embodiments disclosed herein, the tube plug further includes a second rubber ring disposed in a receiving groove outside the tube plug body. The second rubber ring contacts the rear terminal of the tube plug.

[0024] In one or more embodiments disclosed herein, the external receiving groove is recessed from the outer surface of the plug body.

[0025] In summary, in the plug and coupling assembly disclosed herein, because the piston body has a conical surface and two extensions extend from the conical surface of the piston body away from the plug head, the resistance encountered by the fluid (e.g., coolant) flowing through the cavity can be reduced, thereby increasing the flow coefficient. In the plug and coupling assembly disclosed herein, because the annular hook protrudes from the outer surface of the plug body and the annular engagement groove is located behind the annular hook, the retaining ring of the plug seat will be guided into the annular engagement groove by the annular hook, thereby engaging the retaining ring with the annular engagement groove. In the plug and coupling assembly disclosed herein, because the protrusion of the label ring defines the maximum diameter of the rear terminal of the plug seat, when the user holds the plug, the protrusion of the label ring defining the widest point of the plug will provide friction, thereby making the plug less likely to fall out of the user's hand. In the disclosed plug and coupling assembly, since the diameter of the annular engagement groove is smaller than the diameter of the plug body, when the retaining ring of the plug seat passes the outer surface of the plug body and enters the annular engagement groove by the guidance of the annular hook, the retaining ring can engage more tightly with the annular engagement groove, making the plug less likely to be removed from the plug seat. In the disclosed plug and coupling assembly, since the first rubber ring disposed in the piston groove contacts the inner surface of the plug body, fluid overflow in the cavity can be prevented when the plug body moves axially and disengages from the piston. In the disclosed plug and coupling assembly, since the second rubber ring disposed in the outer receiving groove of the plug body contacts the rear terminal of the plug, the rear terminal of the plug seat is less likely to detach from the plug body, preventing fluid overflow in the cavity. In summary, the disclosed plug and coupling assembly not only ensures a tight engagement between the plug seat and the plug during coupling but also reduces the resistance encountered by the fluid flowing through the plug seat and plug, thereby improving heat dissipation efficiency.

[0026] The above description is only used to illustrate the problem to be solved by this disclosure, the technical means to solve the problem, and the effects produced, etc. The specific details of this disclosure will be described in detail in the following implementation methods and related figures. Simple Explanation of the Diagram

[0027] To make the above and other objects, features, advantages and embodiments of this disclosure more apparent and understandable, the accompanying drawings are described below: Figure 1 shows a perspective view of a plug according to one embodiment of the present disclosure. Figure 2 shows an exploded view of a plug according to one embodiment of this disclosure. Figure 3 shows a perspective view of a piston according to one embodiment of this disclosure. Figure 4 shows a top view of a piston according to one embodiment of this disclosure. Figure 5 shows a side view of a piston according to one embodiment of this disclosure. Figure 6 shows a cross-sectional view of a plug based on the cut line 6-6 of Figure 1 according to one embodiment of this disclosure. Figure 7 shows a cross-sectional view of a plug based on the cut line 7-7 of Figure 1 according to one embodiment of this disclosure. Figure 8 shows a perspective view of a coupling component according to one embodiment of this disclosure. Figure 9 illustrates a cross-sectional view of a coupling assembly based on the cut line 9-9 of Figure 8 according to one embodiment of this disclosure. Implementation

[0028] The following drawings disclose several embodiments of this disclosure. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit this disclosure. That is, in some embodiments of this disclosure, these practical details are not essential. Furthermore, for the sake of simplicity, some conventional structures and elements will be shown in a simple schematic manner in the drawings. The same reference numerals will be used to denote the same or similar elements in all drawings.

[0029] The following will describe in detail the structure, function, and connection relationship between the components included in the plug 100 of this embodiment.

[0030] Please refer to Figure 1. Figure 1 is a perspective view of a plug 100 according to one embodiment of the present disclosure. As shown in Figure 1, in this embodiment, the plug 100 includes a plug body 110, a plug rear terminal 120, a label ring 130, and a piston 140. The plug 100 has a cavity. The plug 100 further has a front opening PIL and a rear opening POL located at opposite ends of the cavity. The front opening PIL defines the front end face 111 of the plug body 110. The rear opening POL is located at one end of the plug rear terminal 120. Specifically, the rear opening POL is located at the end of the plug rear terminal 120 away from the plug body 110. The cavity of the plug 100 is elongated along the axial direction of the plug body 110. The plug body 110 includes an annular hook 112 and an annular engagement groove 113. An annular hook 112 and an annular engaging groove 113 extend circumferentially along the plug body 110. The annular hook 112 protrudes from the outer surface of the plug body 110. The annular engaging groove 113 is located behind the annular hook 112. A plug rear terminal 120 is connected to the plug body 110. Specifically, the plug rear terminal 120 is located behind the plug body 110. A label ring 130 is disposed on the plug rear terminal 120 and is located between the plug body 110 and the plug rear terminal 120. The label ring 130 extends circumferentially along the plug body 110. Specifically, the label ring 130 is sleeved on the outside of the plug rear terminal 120 and connected between the plug body 110 and the plug rear terminal 120. In some embodiments, the label ring 130 includes a protrusion 132. The protrusion 132 protrudes from the surface of the label ring 130. Piston 140 is disposed in the cavity of plug 100. Piston 140 is movable relative to plug body 110. In some embodiments, piston 140 is movable relative to plug body 110 along the axial direction of plug body 110.

[0031] In some embodiments, the plug body 110 and the plug rear terminal 120 may be, for example, stainless steel or other suitable rigid materials.

[0032] In some embodiments, the label ring 130 may be, for example, plastic, rubber or other suitable materials.

[0033] In some embodiments, piston 140 may be, for example, plastic, foam, rubber or other suitable insulating material.

[0034] In some embodiments, the protrusion 132 may be, for example, any text or pattern, and therefore this disclosure is not intended to limit the style of the protrusion 132.

[0035] Please refer to Figure 2. Figure 2 is an exploded view of a tube plug 100 according to one embodiment of the present disclosure. As shown in Figure 2, in this embodiment, the tube plug 100 further includes a spring 150, a first rubber ring SL1, and a second rubber ring SL2. The tube plug body 110 has an inner surface 110si and an outer surface 110so. The inner surface 110si and the outer surface 110so are surfaces extending in the axial and circumferential directions of the tube plug body 110. The tube plug body 110 further includes an eaves 115 and an outer receiving groove 117. The eaves 115 is located behind the annular engaging groove 113. The eaves 115 protrudes outward from the outer surface 110so of the tube plug body 110. The outer receiving groove 117 is located behind the eaves 115. The outer receiving groove 117 is recessed from the outer surface 110so of the tube plug body 110.

[0036] Please refer to Figure 2. As shown in Figure 2, in this embodiment, the plug rear terminal 120 includes a rear terminal body 122, a tapered portion 123, an inwardly tapered annular surface 124, and a connecting portion 125. The rear terminal body 122 defines the maximum axial width of the plug rear terminal 120. It should be noted that although the rear terminal body 122 defines the maximum axial width of the plug rear terminal 120, the maximum axial width of the plug 100 is defined by the protrusion 132 of the label ring 130, not the rear terminal body 122. In some embodiments, the rear terminal body 122 may have, for example, a cylindrical shape. The tapered portion 123 extends from the rear terminal body 122, and the diameter of the tapered portion 123 tapers in the axial direction toward the plug body 110. The inwardly tapered annular surface 124 extends from the rear terminal body 122 and is located between the rear terminal body 122 and the tapered portion 123. In some embodiments, the diameters of the constricted annular surface 124 and the tapered portion 123 are both smaller than the diameter of the rear terminal body 122. A connecting portion 125 extends from the rear terminal body 122 and is located on the side of the rear terminal body 122 away from the tapered portion 123 and the constricted annular surface 124. A rear opening POL is located at one end of the connecting portion 125 of the plug rear terminal 120. Specifically, the rear opening POL is located at the end of the connecting portion 125 away from the plug body 110. In some embodiments, the connecting portion 125 includes one or more protruding rings on its surface, such that the connecting portion 125 is connected to an additional water pipe via one or more protruding rings.

[0037] Please refer to Figure 2. As shown in Figure 2, in this embodiment, the label ring 130 further includes a ring body 131 and an inner protrusion 133. The protrusion 132 protrudes outward from the ring body 131. The inner protrusion 133 protrudes inward from the ring body 131. A first rubber ring SL1 is disposed on the piston 140. A second rubber ring SL2 is disposed at the rear end of the tube plug body 110.

[0038] Please refer to Figures 3, 4, and 5. Figure 3 is a perspective view of a piston 140 according to one embodiment of the present disclosure. Figure 4 is a top view of a piston 140 according to one embodiment of the present disclosure. Figure 5 is a side view of a piston 140 according to one embodiment of the present disclosure. As shown in Figures 3 to 5, in this embodiment, the piston 140 includes a piston body 142, a stopper 143, a piston groove 144, and two extensions 146. The piston body 142 has a conical surface 145. Specifically, the piston body 142 is generally conical, and the conical surface 145 defines the shape of the piston body 142. The stopper 143 is disposed on the piston body 142 and has a piston groove 144. Specifically, the bottom surface of the conical piston body 142 is connected to the stopper 143, and the piston groove 144 is located in the middle section of the stopper 143. The stopper 143 further has a front surface 143a at the end of the stopper 143 away from the piston body 142.

[0039] Please refer to Figures 3 through 5. As shown in Figures 3 through 5, in this embodiment, two extensions 146 are disposed on opposite sides of the piston body 142. Each extension 146 extends axially and radially away from the piston body 142 of the plug body 110. Specifically, the two extensions 146 extend radially outward while extending axially away from the piston body 142. The two extensions 146 extend from the conical surface 145 of the piston body 142 away from the plug head 143. In other words, the conical surface 145 of the piston body 142 connects to the two extensions 146, and the apex of the conical piston body 142 does not connect to the plug head 143. In some embodiments, the apex of the conical piston body 142 connects to the two extensions 146. The composite of the two extensions 146 is generally flat. The two extensions 146 have abutment surfaces 146a located on opposite sides of the two extensions 146. Abutment surface 146a is configured for one end of spring 150 to abut against. The inner sides of the two extensions 146 form dome surfaces 146r and define a notch 147. Specifically, the notch 147 is located between and defined between the two extensions 146, and is located on the side of piston body 142 away from the plug head 143. The shape of the notch 147 is defined by the dome surface 146r. In some embodiments, the notch 147 is defined by the piston body 142 and the two extensions 146. In some embodiments, the notch 147 has an arched shape, but this disclosure is not intended to limit the shape of the notch 147. The design of piston 140 helps to reduce the resistance encountered by fluid flowing through piston 140.

[0040] Please refer to Figure 6. Figure 6 is a cross-sectional view of a plug 100 based on section line 6-6 of Figure 1 according to one embodiment of this disclosure. As shown in Figure 6, in this embodiment, the plug body 110 further has an inner groove 116. The inner groove 116 is defined by a recess between the eaves 115 and the plug body 110. In other words, the inner groove 116 is located directly below the eaves 115, and the eaves 115 covers the tapered portion 123 of the plug rear terminal 120. The annular hook 112 has a bevel 112s and an engaging surface 112a. The engaging surface 112a connects to the bevel 112s and is located behind the bevel 112s. In some embodiments, the bevel 112s extends outward along a direction away from the front end face 111 of the plug body 110. The engaging surface 112a extends perpendicularly to the outer surface 110so of the plug body 110. As shown in Figure 6, the plug body 110 has a radial diameter D110, and the annular engagement groove 113 has a radial diameter D113. In some embodiments, the diameter D113 of the annular engagement groove 113 is smaller than the diameter D110 of the plug body 110. This allows the plug 100 and the seat 200 to engage more tightly when coupled (as shown in Figures 8 and 9).

[0041] Please refer to Figure 6. As shown in Figure 6, in this embodiment, the second rubber ring SL2 is disposed in the outer receiving groove 117. Specifically, the outer receiving groove 117 accommodates the second rubber ring SL2. The second rubber ring SL2 contacts the rear terminal 120 of the tube plug. Specifically, the second rubber ring SL2 simultaneously contacts both the outer receiving groove 117 of the tube plug body 110 and the inner surface of the rear terminal 120 of the tube plug. This allows for a tighter connection between the rear terminal 120 of the tube plug and the tube plug body 110.

[0042] Please refer to Figure 6. As shown in Figure 6, in this embodiment, the tapered portion 123 of the rear terminal 120 of the plug is located in the inner groove 116, while the inwardly tapered annular surface 124 of the rear terminal 120 of the plug is not located in the inner groove 116. A label ring 130 is disposed on the inwardly tapered annular surface 124. A first rubber ring SL1 is disposed in the piston groove 144 of the plug head 143. The first rubber ring SL1 contacts the inner surface 110si of the plug body 110. Specifically, the first rubber ring SL1 contacts both the piston groove 144 of the piston 140 and the inner surface 110si of the plug body 110. This prevents fluid from overflowing from the cavity of the plug body 110 when the piston 140 disengages from the inner surface 110si of the plug body 110 in a direction away from the front end face 111. As shown in Figure 6, the front surface 143a of the plug head 143 extends parallel to the front end face 111 of the plug body 110.

[0043] Please refer to Figure 6. As shown in Figure 6, in this embodiment, the two ends of the spring 150 abut against the piston 140 and the rear terminal 120 of the plug, respectively. Specifically, the two ends of the spring 150 abut against the abutment surface 146a of the piston 140 and the abutment surface 120bs of the rear terminal 120 of the plug, respectively. The abutment surface 120bs is located on the step formed by the change in the inner diameter of the rear terminal 120 of the plug. Therefore, the piston 140 can reciprocate relative to the plug body 110 by means of the spring 150.

[0044] In some embodiments, the notch 147 serves as a recess in the piston 140, which reduces the volume occupied by the rear portion of the piston 140 in the cavity of the plug body 110, thereby improving the fluid coefficient.

[0045] Please refer to Figure 7. Figure 7 is a cross-sectional view of the plug 100 according to one embodiment of this disclosure, based on the section line 7-7 of Figure 1. As shown in Figure 7, in this embodiment, since the extension 146 is flat and the piston body 142 has a conical surface 145, the volume occupied by the rear part of the piston 140 in the cavity of the plug body 110 can be minimized, thereby improving the fluid coefficient. As shown in Figure 7, it can be clearly seen that the protrusion 132 of the label ring 130 defines the maximum diameter of the plug 100. This allows the protrusion 132 of the label ring 130 to provide sufficient friction when the user holds the plug 100, thus making it less likely for the plug 100 to slip out of the user's hand.

[0046] The following will describe in detail the structure, function, and connection relationship between the components included in the coupling component CPL of this embodiment.

[0047] Please refer to Figure 8. Figure 8 is a perspective view of a coupling assembly CPL according to one embodiment of the present disclosure. As shown in Figure 8, in this embodiment, the coupling assembly CPL includes the aforementioned plug 100 and a seat 200. The seat 200 is coupled to the plug 100. Specifically, the plug 100 enters the cavity of the seat 200 through the front opening SIL. The seat 200 includes a seat body 210, a seat rear terminal 220, a pressing member 230, and a label ring 250. The seat body 210 accommodates the plug body 110. The seat rear terminal 220 is connected to the seat body 210 and located behind the seat body 210. The rear opening SOL is located at the end of the seat rear terminal 220 away from the plug 100. The pressing member 230 is disposed on the seat body 210 and is movable radially relative to the seat body 210. The pressing member 230 includes a pressing body 232 and a tongue 233. The pressing element 230 further has an arc surface 230fg. The label ring 250 is disposed between the tube seat body 210 and the tube seat rear terminal 220.

[0048] Please refer to Figure 9. Figure 9 is a cross-sectional view of the coupling assembly CPL based on the cut line 9-9 of Figure 8 according to one embodiment of this disclosure. As shown in Figure 9, in this embodiment, the tube seat 200 further includes a retaining ring 240, a sleeve 260, a rod 270, and a spring 280. The retaining ring 240 is movably disposed on the tube seat body 210. The portion of the retaining ring 240 is located within the tube seat body 210. Specifically, the retaining ring 240 includes an elastic portion 242, an upper inner ring portion 244, and a locking ring portion 246. The elastic portion 242 is connected to the upper inner ring portion 244. The upper inner ring portion 244 is connected between the elastic portion 242 and the locking ring portion 246. Specifically, the elastic portion 242 includes opposite ends arranged along the axial direction of the tube seat body 210. One end of the elastic portion 242 is connected to the upper inner ring portion 244. The combination of the upper inner ring portion 244 and the engaging ring portion 246 extends approximately circumferentially along the tube seat body 210. A sleeve 260 is disposed in the cavity of the tube seat body 210 and has a generally annular shape, with the tube plug body 110 abutting against the sleeve 260. The sleeve 260 includes a first portion and a second portion axially connected to each other. The second portion is located behind the first portion. The diameter of the first portion of the sleeve 260 is smaller than the diameter of the second portion. A rod 270 is disposed in the cavity of the tube seat body 210, and the sleeve 260 surrounds the rod 270. A piston 140 abuts against the rod 270. A spring 280 is disposed in the cavity of the tube seat body 210 and surrounds the rod 270.

[0049] In one usage scenario, when the coupling assembly CPL is in the state shown in Figure 9, the plug body 110 of the plug 100 abuts against the sleeve 260 of the seat 200, and the piston 140 of the plug 100 abuts against the rod 270. Then, when the user intends to move the plug 100 and the seat 200 toward each other, the piston 140 abuts against the relatively stationary rod 270, causing the plug body 110 of the plug 100 to push the sleeve 260 axially, and the sleeve 260 moves toward the rear opening SOL. Simultaneously, the piston 140 disengages from the front end of the plug body 110, and both springs 150 and 280 are elastically compressed. Next, when the user intends to continue operating the tube plug 100 and tube seat 200 to move further toward each other, the annular hook 112 contacts the engaging ring portion 246 of the retaining ring 240, and the retaining ring 240 moves downward as the engaging ring portion 246 is guided by the inclined surface 112s of the annular hook 112. Then, when the engaging ring portion 246 reaches the annular engaging groove 113 through the inclined surface 112s of the annular hook 112, the retaining ring 240 resets, causing the retaining ring 240 to tightly engage the annular engaging groove 113, thereby achieving coupling between the tube plug 100 and the tube seat 200.

[0050] Conversely, as shown in Figures 8 and 9, when the user wishes to separate the plug 100 from the seat 200, the user can press the curved surface 230fg of the pressing member 230 with their fingertips, causing the retaining ring 240 to move downwards. In this way, the engaging ring portion 246 of the retaining ring 240 is not located within the axial range of the cavity of the seat body 210, thereby allowing the plug body 110 to disengage from the seat 200 without being stopped by the engaging ring portion 246.

[0051] From the detailed description of the specific embodiments disclosed above, it is evident that in the plug and coupling assembly of this disclosure, since the piston body has a conical surface and the two extensions extend away from the conical surface of the piston body away from the plug head, the resistance encountered by the fluid (e.g., coolant) flowing through the cavity can be reduced, thereby increasing the flow coefficient. In the plug and coupling assembly of this disclosure, since the annular hook protrudes from the outer surface of the plug body and the annular engagement groove is located behind the annular hook, the retaining ring of the plug seat will be guided into the annular engagement groove by the annular hook, thereby engaging the retaining ring with the annular engagement groove. In the plug and coupling assembly of this disclosure, since the protrusion of the label ring defines the maximum diameter of the rear terminal of the plug seat, when the user holds the plug, the protrusion of the label ring defining the widest part of the plug will provide friction, thereby making the plug less likely to fall out of the user's hand. In the disclosed plug and coupling assembly, since the diameter of the annular engagement groove is smaller than the diameter of the plug body, when the retaining ring of the plug seat passes the outer surface of the plug body and enters the annular engagement groove by the guidance of the annular hook, the retaining ring can engage more tightly with the annular engagement groove, making the plug less likely to be removed from the plug seat. In the disclosed plug and coupling assembly, since the first rubber ring disposed in the piston groove contacts the inner surface of the plug body, fluid overflow in the cavity can be prevented when the plug body moves axially and disengages from the piston. In the disclosed plug and coupling assembly, since the second rubber ring disposed in the outer receiving groove of the plug body contacts the rear terminal of the plug, the rear terminal of the plug seat is less likely to detach from the plug body, preventing fluid overflow in the cavity. In summary, the disclosed plug and coupling assembly not only ensures a tight engagement between the plug seat and the plug during coupling but also reduces the resistance encountered by the fluid flowing through the plug seat and plug, thereby improving heat dissipation efficiency.

[0052] Although the present disclosure has been described above with reference to embodiments, it is not intended to limit the present disclosure. Anyone skilled in the art may make various modifications and refinements without departing from the spirit and scope of the present disclosure. Therefore, the scope of protection of the present disclosure shall be determined by the appended claims.

[0053] 100: Pipe plug 110: Pipe plug body 110si: Inner surface 110so: outer surface 111: Front end 112: Ring-shaped hook 112a: Card-fitting surface 112s: Inclined plane 113: Annular locking groove 115: Eaves 116: Inner Ditch 117: External accommodating slot 120: Rear terminal of the tube plug 120bs, 146a: Abutment surface 122: Rear terminal body 123: tapering section 124: Inwardly contracted annular surface 125: Connecting section 130, 250: Tag ring 131: Ring Body 132:convex part 133:Inner bump 140: Piston 142: Piston Body 143: Plug 143a: Front surface 144: Piston Groove 145: Conical surface 146: Extension 146r: Dome 147: Gap 150, 280: Springs 200: Tube seat 210: Tube seat body 220: Rear terminal of the tube socket 230: Pressing component 230fg: Curved surface 232: Press the main body 233: Tongue 240: Buckle 242: Elastic part 244: Embedded ring 246: Engaging ring section 260: Sleeve 270: Rod 6-6, 7-7, 9-9: Cutting lines CPL: Coupling Component D110, D113: Diameter PIL, SIL: Front opening POL, SOL: Rear opening SL1, SL2: Rubber rings

[0054] Domestic storage information (please note in order of storage institution, date, and number) none Overseas storage information (please note in the order of storage country, institution, date, and number) none

Claims

1. A plug having a cavity and a front opening and a rear opening located at opposite ends of the cavity, comprising: a plug body including an annular hook protruding from an outer surface of the plug body, wherein the front opening defines a front end face of the plug body; a plug rear terminal connected to the plug body, and the rear opening being located at the end of the plug rear terminal away from the plug body; and a piston disposed in the cavity, the piston comprising: a piston body having a conical surface; a plug head disposed on the piston body; and two extensions disposed on opposite sides of the piston body, the two extensions extending from the conical surface of the piston body away from the plug head, wherein a notch is defined between the two extensions on the side of the piston body away from the plug head.

2. The tube plug as described in claim 1 further includes a label ring disposed on the rear terminal of the tube plug, and the label ring is located between the rear terminal of the tube plug and the tube plug body.

3. The tube plug as claimed in claim 2, wherein the label ring comprises: a ring body; a protrusion projecting outward from the ring body; and an inner protrusion projecting inward from the ring body, wherein the protrusion of the label ring defines a maximum diameter of the tube plug.

4. The plug as claimed in claim 1, wherein the plug head of the piston has a front surface at one end of the plug head remote from the piston body, and the front surface of the plug head extends parallel to the front end face of the plug body.

5. The tube plug as claimed in claim 1, wherein the tube plug body further has an annular engagement groove located behind the annular hook.

6. The plug as claimed in claim 5, wherein the diameter of one of the annular engagement grooves is smaller than the diameter of one of the plug bodies.

7. The plug as claimed in claim 1 further includes a spring, the two ends of which abut against the piston and the rear terminal of the plug, respectively.

8. The tube plug as claimed in claim 1, further comprising a first rubber ring disposed in a piston groove of the plug head, and the first rubber ring contacting an inner surface of the tube plug body.

9. The tube plug as claimed in claim 1, further comprising a second rubber ring disposed in an outer receiving groove of one of the tube plug bodies, and the second rubber ring contacting the rear terminal of the tube plug.

10. The plug as claimed in claim 9, wherein the external receiving groove is recessed from the outer surface of the plug body.

11. A coupling assembly comprising: a plug having a cavity and a front opening and a rear opening located at opposite ends of the cavity, comprising: a plug body including an annular hook protruding from an outer surface of the plug body, wherein the front opening defines a front end face of the plug body; a plug rear terminal connected to the plug body, and the rear opening being located at an end of the plug rear terminal remote from the plug body; and a piston disposed in the cavity, the piston including a piston body, a plug head, and two extensions, the piston body having a conical surface, the plug head being disposed on the piston body, the two extensions being disposed on opposite sides of the piston body, and the two extensions extending from the conical surface of the piston body remote from the plug head, wherein a notch is defined between the two extensions on the side of the piston body remote from the plug head; and a seat coupled to the plug, comprising: a seat body accommodating the plug body; A retaining ring is movably disposed on the tube seat body, and a portion of the retaining ring is located inside the tube seat body; a sleeve is disposed in the tube seat body, and the tube plug body abuts against the sleeve; and a rod is disposed in the tube seat body, and the sleeve surrounds the rod, wherein the piston abuts against the rod.

12. The coupling assembly as claimed in claim 11, wherein the plug further includes a label ring disposed on the rear terminal of the plug, and the label ring is located between the rear terminal of the plug and the plug body.

13. The coupling assembly as claimed in claim 12, wherein the label ring comprises: a ring body; a protrusion projecting outward from the ring body; and an inner protrusion projecting inward from the ring body, wherein the protrusion of the label ring defines a maximum diameter of the plug.

14. The coupling assembly as claimed in claim 11, wherein the piston head has a front surface at one end of the head remote from the piston body, and the front surface of the head extends parallel to the front end face of the tube plug body.

15. The coupling assembly as claimed in claim 11, wherein the plug body further has an annular engagement groove located behind the annular hook.

16. The coupling assembly as claimed in claim 15, wherein the diameter of one of the annular engagement grooves is smaller than the diameter of one of the plug bodies.

17. The coupling assembly as claimed in claim 11, wherein the plug further includes a spring with its two ends abutting against the piston and the rear terminal of the plug, respectively.

18. The coupling assembly as claimed in claim 11, wherein the plug further includes a first rubber ring disposed in a piston groove of the plug head, and the first rubber ring contacts an inner surface of the plug body.

19. The coupling assembly as claimed in claim 11, wherein the plug further includes a second rubber ring disposed in an external receiving groove of one of the plug bodies, and the second rubber ring contacts the rear terminal of the plug.

20. The coupling assembly as claimed in claim 19, wherein the external receiving groove is recessed from the outer surface of the plug body.

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