Three-plug socket
The three-prong socket with horizontally arranged earth pin sockets and angled gripping surfaces addresses the instability issue in high-current applications, ensuring secure and stable connections while enhancing safety and water resistance.
Patent Information
- Application Number
- CN202521002370.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-21
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2035-05-21
AI Technical Summary
The existing three-plug plug is easily loosened or fall off due to gravity in the 32A current circuit. In the prior art, the contact area between the ground pole pin and the ground pole plug are small and the fixing is not firm.
The clamping surface of the ground pole sleeve is arranged horizontally, and the clamping surfaces of the L-pole and N-pole sleeves are arranged inclined. Combined with the return spring and the protective door structure, the plug area is increased and the stability is improved through the limit structure, and the waterproof groove and the water guide groove are set to improve waterproof performance.
The three-plug plug is enhanced in the 32A current circuit, reducing plug-and-removal resistance, and improving safety and waterproof performance.
Smart Images
Figure CN223109306U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of low-voltage electrical appliances, and particularly relates to a three-pin socket. Background Art
[0002] In the prior art, the earth pin and the earth socket are vertically arranged. When the wall socket is installed on the wall, the contact area between the earth pin and the earth socket in the gravity direction is small, and it is easy to loosen after being plugged due to the influence of gravity. At present, most of the three-pin plugs on the market are applied to 16A current circuits, with small volume and weight. In the prior art, for the plugs applied to 32A current circuits, since they need to pass a larger current, the volume of their internal parts increases accordingly, resulting in a larger weight of the 32A three-pin plug. After the 32A three-pin plug is connected to the wall socket, it is not firmly fixed due to the influence of gravity and is easy to loosen or fall off. Therefore, there is an urgent need for a three-pin socket and a corresponding three-pin plug with better fixing effect. Summary of the Utility Model
[0003] The purpose of the utility model is to overcome the defects of the prior art and provide a three-pin socket with a laterally arranged clamping surface of the earth socket to adapt to a three-pin plug with a laterally arranged earth pin and to overcome the problem of loosening of the plug-in due to the influence of gravity in the prior art.
[0004] To achieve the above purpose, the utility model adopts the following technical solutions:
[0005] The present application provides a three-pin socket, including a socket housing and a socket assembly. The socket housing includes at least three pin holes, namely an L-pole pin hole, an N-pole pin hole, and an earth pin hole. The socket assembly includes at least an L-pole socket, an N-pole socket, an earth socket, a protection door, and a return spring. The L-pole socket, the N-pole socket, and the earth socket each include two clamping arms, and the clamping arms are provided with clamping surfaces for clamping the pins. The return spring is connected to the protection door and is used to drive the protection door to move to a first position where the three pin holes are blocked. The protection door is forced by an external force to overcome the elastic force of the return spring and move to a second position where it is misaligned with the three pin holes.
[0006] The L-pole pin hole, the N-pole pin hole, and the earth pin hole are rectangular structures. The length edge of the earth pin hole is horizontally arranged in a first direction, and the width edge of the earth pin hole is arranged in a second direction. The first direction is perpendicular to the second direction. The length edges of the L-pole pin hole and the N-pole pin hole are inclined with respect to the first direction and the second direction, and the L-pole pin hole and the N-pole pin hole are on the same side of the earth pin hole in the second direction. The clamping surfaces of the two clamping arms of the earth socket are horizontally arranged in the first direction.
[0007] In a possible implementation, the included angle between the length direction of the ground pole socket hole and the length direction of the L-pole socket hole is 60°, the included angle between the length direction of the ground pole socket hole and the length direction of the N-pole socket hole is 60°, and the included angle between the length direction of the L-pole socket hole and the length direction of the N-pole socket hole is 60°; the included angle between the clamping surface of the ground pole socket and the clamping surface of the L-pole socket is 60°, the included angle between the clamping surface of the ground pole socket and the clamping surface of the N-pole socket is 60°, and the included angle between the clamping surface of the L-pole socket and the clamping surface of the N-pole socket is 60°.
[0008] In a possible implementation, the protection door includes a ground pole shielding area for shielding the ground pole socket, an L-pole shielding area for shielding the L-pole socket, and an N-pole shielding area for shielding the N-pole socket. The ground pole shielding area includes an inclined surface for shielding the ground pole socket hole. An inclined first notch is formed between the ground pole shielding area and the L-pole shielding area, and between the ground pole shielding area and the N-pole shielding area. When the inclined surface is stressed, it can drive the protection door to move to the second position in the second direction, so that the first notch faces the corresponding L-pole socket and N-pole socket.
[0009] In a possible implementation, at least a part of the ground pole shielding area protrudes towards the ground pole socket hole to form a first limiting protrusion. One side of the first limiting protrusion is provided with the inclined surface, and the other side is provided with a first fixing part for installing the return spring. The L-pole shielding area and the N-pole shielding area are flat surfaces.
[0010] In a possible implementation, the socket assembly further includes a first partition plate located between the protection door and the L-pole socket, the N-pole socket, and the ground pole socket; the first partition plate includes second L-pole socket holes, second N-pole socket holes, and second ground pole socket holes corresponding to the positions of the L-pole socket hole, the N-pole socket hole, and the ground pole socket hole; the socket assembly further includes a second partition plate located between the protection door and the socket housing. The second partition plate includes a third ground pole socket hole corresponding to the second ground pole socket hole, a third L-pole socket hole corresponding to the second L-pole socket hole, and a third N-pole socket hole corresponding to the second N-pole socket hole; the second partition plate covers the first partition plate, and a sliding space for the protection door is formed between the second partition plate and the first partition plate.
[0011] In a possible implementation, the width of the second ground pole socket hole is greater than the width of the ground pole socket hole, so that at least a part of the ground pole socket extends into the second ground pole socket hole.
[0012] In a possible implementation manner, two opposite limiting side plates and two limiting platforms are provided on the side of the second partition plate facing the first partition plate. The third L-pole pin hole and the third N-pole pin hole are respectively provided on the two limiting platforms. The protection door is limited between the two limiting side plates, and when the protection door is in the first position, the L-pole shielding area and the N-pole shielding area are abutted against the two limiting platforms.
[0013] In a possible implementation manner, the protection door includes two limiting grooves respectively located on the N-pole shielding area and the L-pole shielding area. After the limiting platform abuts against the protection door in the first position, it wraps the corresponding limiting groove.
[0014] In a possible implementation manner, the protection door includes a water guide groove, which is communicated with the limiting groove and is used to introduce the water in the limiting groove into the socket housing. A drain port is opened on the bottom wall of the socket housing for discharging the water entering the socket housing.
[0015] In a possible implementation manner, the socket housing includes a socket base and a socket face cover. The earth-pole pin hole, the N-pole pin hole and the L-pole pin hole are opened on the socket face cover. The socket sleeve assembly is installed in the socket base. The socket base includes at least three wiring terminal installation grooves, a first partition plate installation groove and a second partition plate installation groove. The L-pole socket sleeve, the N-pole socket sleeve and the earth-pole socket sleeve, and the corresponding three wiring terminals are respectively installed in the three wiring terminal installation grooves. The first partition plate is installed in the first partition plate installation groove above the three wiring terminal installation grooves. The second partition plate is installed in the second partition plate installation groove above the first partition plate and does not protrude from the socket base.
[0016] In a possible implementation manner, a strip-shaped first water guide groove is provided on the outer side wall of the socket base. The first water guide groove is at least located on the top wall of the socket base and is configured to block the water flowing towards the wiring terminals located on the rear wall of the socket base.
[0017] In a possible implementation manner, the clamping arms of the earth-pole socket sleeve, the L-pole socket sleeve and the N-pole socket sleeve all include second notches.
[0018] In a possible implementation manner, at least the width of the clamping arm of the earth-pole socket sleeve is smaller than the width of the earth-pole pin. The second notch of the earth-pole socket sleeve is located on one side of the two clamping arms. The second earth-pole pin hole includes a communicated third notch and a fourth notch. The area of the third notch is smaller than the area of the fourth notch. The earth-pole socket sleeve is partially located in the fourth notch, and the earth-pole pin passes through the third notch and the fourth notch to be connected with the earth-pole socket sleeve.
[0019] Compared with the prior art, the clamping surfaces of the two clamping arms of the ground pole socket are arranged horizontally, the clamping surfaces of the two clamping arms of the L-pole socket are arranged obliquely, and the clamping surfaces of the two clamping arms of the N-pole socket are arranged obliquely. After the three-pin plug is inserted into the three-pin socket, the contact area between the ground pole pin and the ground pole socket is increased in the gravity direction, improving the firmness of the insertion.
[0020] In addition, the ground pole socket, the L-pole socket and the N-pole socket include a second notch, which is used to reduce the clamping force between the two clamping arms of the socket. Since the three-pin socket provided in this application can be used to connect to a 32A current circuit, the thickness of the clamping arms of the socket is thicker, resulting in too large a clamping force between the two clamping arms, and the insertion and extraction of the pin and the socket are not smooth enough. By providing the second notch on the socket, the clamping force of the socket can be weakened, making the insertion and extraction of the pin and the socket smoother.
[0021] In addition, the first partition plate includes a second L-pole pin hole, a second N-pole pin hole and a second ground pole pin hole corresponding to the positions of the above three pin holes. The width of the second ground pole pin hole is greater than the width of the ground pole pin hole, so that at least part of the ground pole socket extends into the second ground pole pin hole, and the ground pole pin can be connected to the ground pole socket in advance to complete the ground protection, improving the safety of the socket.
[0022] In addition, the second partition plate covers the first partition plate, and a sliding space for the protection door is formed between the second partition plate and the first partition plate to close the socket; in particular, two limiting platforms are provided on the second partition plate, and the third L-pole pin hole and the third N-pole pin hole are respectively provided on the two limiting platforms. When the protection door is in the first position, the L-pole shielding area and the N-pole shielding area abut against the two limiting platforms, which can close the third L-pole pin hole and the third N-pole pin hole, so that when a single conductor is inserted into the L-pole pin hole or the N-pole pin hole, it cannot be inserted into the socket interior, and the protection door will not deflect either. The friction between the pin and the protection door is used to prevent a single conductor from being inserted and pushing the protection door to move, avoiding the risk of electric shock.
[0023] In addition, the protection door includes two limiting grooves respectively located on the N-pole shielding area and the L-pole shielding area. Further, a water guide groove can be provided to guide the water from the limiting groove to the bottom of the socket housing and discharge it from the drain port of the socket housing, further improving the waterproof performance.
[0024] In addition, a strip-shaped first water guide groove is provided on the socket base to block the water flowing towards the terminal and guide the water to the ground, improving the waterproof performance of the socket. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 is an exploded view of the three-pin socket of the present utility model;
[0026] Figure 2 is a cross-sectional view of the three-pin socket of the present utility model;
[0027] Figure 3 is a schematic structural diagram of the protection door of the present utility model in the first position;
[0028] Figure 4 is a schematic structural diagram of the protection door of the present utility model in the second position;
[0029] Figure 5 is a schematic structural diagram of the second partition of the present utility model;
[0030] Figure 6 is a schematic structural diagram of the protection door of the present utility model;
[0031] Figure 7 is a schematic structural diagram of the grounding pin sleeve of the present utility model;
[0032] Figure 8 is a schematic structural diagram of the L-pin sleeve and N-pin sleeve of the present utility model;
[0033] Figure 9 is a schematic structural diagram of the back of the socket base of the present utility model;
[0034] Figure 10 is a schematic structural diagram of the front of the socket base of the present utility model;
[0035] Figure 11 is a schematic structural diagram of another embodiment of the protection door of the present utility model;
[0036] The reference numerals in the drawings include: the second direction 2; the socket base 11; the socket face cover 12; the first water guide groove 13; the drain port 14; the second water guide groove 15; the L-pin hole 21; the N-pin hole 22; the grounding pin hole 23; the L-pin sleeve 211; the N-pin sleeve 221; the second notch 222; the terminal 223; the clamping arm 224; the connecting plate 225; the second limiting projection 226; the grounding pin sleeve 231; the protection door 24; the grounding shielding area 241; the L-pin shielding area 242; the N-pin shielding area 243; the inclined surface 244; the first limiting projection 245; the first fixing part 246; the first notch 247; the limiting groove 248; the return spring 25; the first partition 26; the second L-pin hole 261; the second N-pin hole 262; the second grounding pin hole 263; the fifth notch 264; the third notch 2631; the fourth notch 2632; the second partition 27; the third L-pin hole 271; the third N-pin hole 272; the third grounding pin hole 273; the extension part 274; the extension plate 275; the first through hole 276; the limiting side plate 277; the limiting platform 278; the water guide groove 249. Detailed implementation manners
[0037] The following embodiments given in conjunction with the accompanying drawings further illustrate the specific implementation manners of the present utility model. The protection scope of the present utility model is not limited to the descriptions of the following embodiments.
[0038] As Figures 1-11 shown, the present application provides a three-pin socket, including a socket housing and a socket sleeve assembly. The socket housing includes pin holes, and the socket sleeve assembly is installed inside the socket housing and corresponds to the pin holes.
[0039] The pin holes at least include three pin holes: an L-pole pin hole 21, an N-pole pin hole 22, and a ground-pole pin hole 23. The socket sleeve assembly at least includes an L-pole socket sleeve 211, an N-pole socket sleeve 221, and a ground-pole socket sleeve 231 corresponding to the above three pin holes. The L-pole socket sleeve 211, the N-pole socket sleeve 221, and the ground-pole socket sleeve 231 each include two clamping arms. The clamping arms are provided with clamping surfaces for clamping pins, and the two clamping arms clamp the pins of the plug through the clamping surfaces.
[0040] To adapt to the flat structure of the pins, the L-pole pin hole 21, the N-pole pin hole 22, and the ground-pole pin hole 23 are rectangular structures. The length edge of the ground-pole pin hole 23 is horizontally arranged in the first direction, and the width edge of the ground-pole pin hole 23 is arranged in the second direction 2. The length sides of the L-pole pin hole 21 and the N-pole pin hole 22 are inclined with respect to the first direction and the second direction 2, and the L-pole pin hole 21 and the N-pole pin hole 22 are on the same side of the ground-pole pin hole 23 in the second direction 2, that is, on the same side in the width direction of the ground-pole pin hole 23. Correspondingly, the clamping surfaces of the two clamping arms 224 of the ground-pole socket sleeve 231 are horizontally arranged in the first direction. The clamping surfaces of the two clamping arms 224 of the L-pole socket sleeve 211 are inclined. The clamping surfaces of the two clamping arms 224 of the N-pole socket sleeve 221 are inclined. And the L-pole socket sleeve 211 and the N-pole socket sleeve 221 are on the same side of the ground-pole socket sleeve 231 in the second direction 2. The first direction is perpendicular to the second direction 2. The direction in which the pins of the plug are inserted into the corresponding pin holes is the third direction. The first direction, the second direction 2, and the third direction are perpendicular to each other pairwise. Wherein, the clamping surface is perpendicular to the clamping direction of the two clamping arms 224.
[0041] Compared with the prior art, the clamping surfaces of the two clamping arms 224 of the ground-pole socket sleeve 231 are horizontally arranged, and the ground-pole pin hole 23 is correspondingly horizontally arranged. The clamping surfaces of the two clamping arms 224 of the L-pole socket sleeve 211 are inclined. The clamping surfaces of the two clamping arms 224 of the N-pole socket sleeve 221 are inclined. After the three-pin plug is plugged into the three-pin socket, the contact area between the ground-pole pin and the ground-pole socket sleeve 231 is increased in the gravity direction, improving the firmness of the plug-in connection.
[0042] Preferably, the included angle between the length direction of the earth pole socket hole 23 and the length direction of the L pole socket hole 21 is 60°, the included angle between the length direction of the earth pole socket hole 23 and the length direction of the N pole socket hole 22 is 60°, and the included angle between the length direction of the L pole socket hole 21 and the length direction of the N pole socket hole 22 is 60°; the included angle between the clamping surface of the earth pole socket 231 and the clamping surface of the L pole socket 211 is 60°, the included angle between the clamping surface of the earth pole socket 231 and the clamping surface of the N pole socket 221 is 60°, and the included angle between the clamping surface of the L pole socket 211 and the clamping surface of the N pole socket 221 is 60°.
[0043] Preferably, as Figure 1 , Figure 3 and Figure 4 shown, the socket assembly includes a protection door 24 and a return spring 25. The return spring 25 is connected to the protection door 24 and drives the protection door 24 to move to a first position where it blocks the socket hole. The protection door 24 is forced by an external force to overcome the elastic force of the return spring 25 and move to a second position where it is misaligned with the socket hole, so that the plug can be inserted into the socket hole. The return spring 25 can be, but is not limited to, a tension spring, a torsion spring or a compression spring. Among them, Figure 3 is a schematic structural diagram when the protection door is in the first position, Figure 4 is a schematic structural diagram when the protection door is in the second position.
[0044] Further, as Figure 6 shown, the protection door 24 includes an earth pole shielding area 241 for shielding the earth pole socket 231, an L pole shielding area 242 for shielding the L pole socket 211, and an N pole shielding area 243 for shielding the N pole socket 221. The earth pole shielding area 241 includes an inclined surface 244 for shielding the earth pole socket hole 23. The earth pole plug contacts the inclined surface 244 and drives the protection door 24 to move upward or downward along the second direction 2. In the preferred embodiment of the present application, the L pole shielding area 242 and the N pole shielding area 243 are axially symmetric structures along the second direction 2.
[0045] Further, as Figure 6 shown, the return spring 25 is connected between the protection door 24 and the socket housing. As Figure 2 shown, the protection door 24 includes a first limit projection 245. One end of the return spring 25 abuts against the first limit projection 245, and the other end abuts against the socket housing. In this embodiment, at least part of the earth pole shielding area 241 protrudes toward the earth pole socket hole 23 to form the first limit projection 245. The first limit projection 245 includes a first fixing portion 246. One side of the first limit projection 245 is provided with the inclined surface 244, and the other side is provided with the first fixing portion 246. One end of the return spring 25 is fixed on the first fixing portion 246. Among them,Figure 2 It is a cross-sectional view of the three-pin socket of the present application.
[0046] In a preferred embodiment of the present application, as Figure 2 and Figure 6 shown, the thickness of the ground pole shielding area 241 gradually thickens along the second direction 2 to form the inclined surface 244. The return spring 25 is a compression spring. An inclined first notch 247 is formed between the ground pole shielding area 241 and the L-pole shielding area 242, and between the ground pole shielding area 241 and the N-pole shielding area 243. The inclined surface 244 can drive the protection door 24 to slide along the second direction 2 to the second position under an external force, avoiding the ground pole plug, and making the first notch 247 opposite to the corresponding L-pole socket 211 and N-pole socket 221. The first notch 247 avoids the L-pole plug and the N-pole plug.
[0047] Preferably, the included angle between the inclination directions of the first notches 247 of the L-pole shielding area 242 and the ground pole shielding area 241 and the inclination directions of the first notches 247 of the N-pole plug and the ground pole plug is 60°. Preferably, the L-pole shielding area 242 and the N-pole shielding area 243 are planes. That is, when the plug is not inserted, the parts corresponding to the L-pole plug hole 21 and the N-pole plug hole 22 are planes, and inserting a single conductor into the L-pole shielding area 242 or the N-pole shielding area 243 will not push the protection door 24 to move. In this embodiment, the L-pole shielding area 242 and the N-pole shielding area 243 are provided with limiting grooves 248, and the bottom of the limiting grooves 248 is the plane. Of course, the limiting grooves 248 may not be provided.
[0048] In another embodiment, the thickness of the ground pole shielding area 241 gradually thins along the second direction 2 to form the inclined surface 244. A first through hole is connected below the inclined surface 244. The return spring 25 is a tension spring. The ground pole shielding area 241 slides in the opposite direction of the second direction 2 under an external force, making the N-pole shielding area 243 misaligned with the N-pole plug hole 22, and the L-pole shielding area 242 misaligned with the L-pole plug hole 21, avoiding the L-pole plug and the N-pole plug. The ground pole shielding area 241 moves to the position where the first through hole corresponds to the ground pole plug hole 23, so that the ground pole plug can pass through the first through hole.
[0049] Preferably, as Figure 1 shown, the socket assembly further includes a first partition 26, and the first partition 26 is located between the above three sockets and the protection door 24. The sockets and the first partition 26 are installed in the socket housing. The protection door 24 is attached to the first partition 26. The first partition 26 can support the protection door 24 and separate the protection door 24 from the sockets.
[0050] Further, the protection door is slidably arranged on the first partition plate 26, and a slide rail and a chute (not shown in the figure) are arranged between the first partition plate 26 and the protection door, so that the protection door slides stably. Further, at least one slide rail is arranged on the protection door, and at least one chute is arranged on the first partition plate 26, or at least one chute is arranged on the protection door, and at least one slide rail is arranged on the first partition plate 26.
[0051] Further, as Figure 1 shown, the first partition plate 26 includes a second L-pole plug hole 261, a second N-pole plug hole 262, and a second ground-pole plug hole 263 corresponding to the positions of the above three plug holes. The width of the second ground-pole plug hole 263 is greater than the width of the ground-pole plug hole 23, so that at least part of the ground-pole socket 231 extends into the second ground-pole plug hole 263, and the ground-pole plug can be connected to the ground-pole socket 231 in advance to complete the ground protection, improving the safety of the socket.
[0052] Preferably, as Figure 7 and Figure 8 shown, the ground-pole socket 231, the L-pole socket 211, and the N-pole socket 221 include a second notch 222, and the second notch 222 is used to reduce the clamping force between the two clamping arms 224 of the socket. Since the three-pin socket provided in this application can be used to connect to a 32A current circuit, the thickness of the clamping arms 224 of the socket is thicker, resulting in too large a clamping force between the two clamping arms 224, and the plug and socket are not smooth enough to be inserted and pulled out. By providing the second notch 222 on the socket, the clamping force of the socket can be weakened, making the plug and socket smoother to be inserted and pulled out. In the embodiment of the present application, the L-pole socket 211 and the N-pole socket 221 have the same structure.
[0053] Further, as Figure 7 shown, the second notch 222 of the ground-pole socket 231 is located on one side of the two clamping arms 224. As Figure 8 shown, the second notches 222 of the L-pole socket 211 and the N-pole socket 221 are located at the bottom of the two clamping arms 224. The socket includes a wiring terminal 223, two clamping arms 224, and a connecting plate 225 connecting the two clamping arms 224 and the wiring terminal 223. The wiring terminal 223 includes an inlet frame and a pressing screw connected to one side of the inlet frame, and the pressing screw moves telescopically relative to the inlet frame. The connecting plate 225 is located at the bottom of the two clamping arms 224, and the second notch 222 of the ground-pole socket 231 is located on the side close to the clamping arm 224 close to the wiring terminal 223.
[0054] Further, as Figure 7 and Figure 8As shown, the clamping surfaces of the two clamping arms 224 of the earth pole socket 231 are perpendicular to the telescopic direction of the wire pressing screw. The clamping surfaces of the two clamping arms 224 of the L pole socket 211 form an obtuse angle or an acute angle with the telescopic direction of the wire pressing screw. The N pole socket 221 has the same structure as the L pole socket 211 and will not be elaborated here.
[0055] Further, among the N pole socket 221, the L pole socket 211, and the earth pole socket 231, at least the width of the clamping arm 224 of the earth pole socket 231 is smaller than the width of the earth pole plug, which can further reduce the clamping force between the two clamping arms 224, reduce the insertion and extraction force between the plug and the socket, and make the insertion and extraction smoother.
[0056] Further, as Figure 1 shown, the second earth pole plug hole 263 includes a connected third notch 2631 and a fourth notch 2632. The area of the third notch 2631 is smaller than the area of the fourth notch 2632, the width of the third notch 2631 is smaller than the width of the fourth notch 2632, and the third notch 2631 is located in the middle of the width direction of the fourth notch 2632. The two clamping arms 224 of the earth pole socket 231 are located in the fourth notch 2632, and the earth pole plug passes through both the third notch 2631 and the fourth notch 2632 and is inserted between the two clamping arms 224.
[0057] Preferably, as Figure 1 shown, the socket assembly further includes a second partition 27. The second partition 27 is located between the protection door 24 and the socket housing, and the second partition 27 is used to limit the moving direction of the protection door 24 to make the moving effect of the protection door 24 more stable. The second partition 27 includes a third earth pole plug hole 273 corresponding to the earth pole plug hole 23 and the second earth pole plug hole 263, a third L pole plug hole 271 corresponding to the L pole plug hole 21 and the second L pole plug hole 261, and a third N pole plug hole 272 corresponding to the N pole plug hole 22 and the second N pole plug hole 262. The second partition 27 covers the first partition 26, and a sliding space for the protection door 24 is formed between the second partition 27 and the first partition 26.
[0058] Preferably, as Figure 1 shown, the socket housing includes a socket base 11 and a socket face cover 12. The earth pole plug hole 23, the N pole plug hole 22, and the L pole plug hole 21 are opened on the socket face cover 12. The socket assembly is installed in the socket base 11, and the socket face cover 12 covers the socket base 11.
[0059] Further, the socket base 11 and the socket face cover 12 are snap-fitted.
[0060] Further, as Figure 1As shown, the socket base 11 includes at least three terminal mounting grooves, a first partition mounting groove, and a second partition mounting groove. The L-pole socket 211, N-pole socket 221, and ground-pole socket 231, as well as the corresponding three terminals 223, are respectively installed in the three terminal mounting grooves. The first partition 26 is installed in the first partition mounting groove above the three terminal mounting grooves. The second partition 27 is installed in the second partition mounting groove above the first partition 26 and does not protrude from the socket base 11. The protection door 24 and the return spring 25 are located between the first partition 26 and the second partition 27. Compared with the prior art, this structure can make the socket structure compact and thinner, with good aesthetics.
[0061] Further, as Figure 1 shown, the second partition 27 limits the first partition 26. The first partition 26 includes at least one fifth notch 264. The second partition 27 includes at least one extension 274 extending towards the first partition 26 (as Figure 5 ), and the extension 274 extends into the fifth notch 264 to limit the first partition 26. In this embodiment, the first partition 26 includes four fifth notches 264 spaced apart, and the four fifth notches 264 are respectively arranged at the four corners of the first partition 26. The second partition 27 includes four extensions 274, and the four extensions 274 respectively extend into the four fifth notches 264.
[0062] Further, as Figure 1 and Figure 8 shown, the L-pole socket 211, N-pole socket 221, and ground-pole socket 231 all include a second limiting protrusion 226, and the three sockets are limited in the corresponding terminal mounting grooves through the second limiting protrusion 226.
[0063] Further, as Figure 1 、 Figure 5 and Figure 9 shown, the second partition 27 is snap-connected to the socket base 11. The second partition 27 extends four extension plates 275 towards the first partition 26. The four extension plates 275 are spaced apart near the two opposite sides of the second partition 27. Each of the four extension plates 275 is provided with a snap groove or a snap hole. Four first through holes 276 and four snap protrusions respectively located near the four first through holes 276 are provided in the socket base 11. When the second partition 27 is installed in the second partition mounting groove, the limiting plate extends into the first through hole 276, and the snap protrusion is stuck in the snap groove or the snap hole. Alternatively, in other embodiments, it is also possible that the extension plate 275 includes a snap protrusion and the vicinity of the first through hole 276 includes a snap groove or a snap hole, which is also within the protection scope of this application.
[0064] Further, asFigure 5 As shown, the protection door 24 is installed on the second partition plate 27. On the side of the second partition plate 27 facing the first partition plate 26, there are two opposite limiting side plates 277 and two limiting platforms 278. The third L-pole pin holes 271 and the third N-pole pin holes 272 are respectively provided on the two limiting platforms 278. The protection door 24 is limited between the two limiting side plates 277, with one side abutted against the two limiting platforms 278 and the other side attached to the first partition plate 26. That is, when the protection door 24 is in the first position, the L-pole shielding area 242 and the N-pole shielding area 243 are abutted against the two limiting platforms 278. Since the two limiting platforms 278 are abutted against the L-pole shielding area 242 and the N-pole shielding area 243, the third L-pole pin holes 271 and the third N-pole pin holes 272 can be closed, so that when a single conductor is inserted into the L-pole pin hole 21 and the N-pole pin hole 22, it cannot be inserted into the interior of the socket, and the protection door 24 will not deflect either. The friction between the pin and the protection door can prevent a single conductor from pushing the protection door 24 to move when inserted, avoiding the risk of electric shock and greatly improving the waterproof performance.
[0065] Further, as Figure 6 shown, the protection door 24 includes two limiting grooves 248 respectively located on the N-pole shielding area 243 and the L-pole shielding area 242. After the limiting platform 278 abuts against the protection door 24 in the first position, it wraps the corresponding limiting groove 248 to improve the waterproof performance.
[0066] Preferably, as Figure 10 shown, a strip-shaped first water guide groove 13 is provided on the outer side wall of the socket base 11. The first water guide groove 13 is at least located on the top wall of the socket base 11. Preferably, the first water guide groove 13 is located on the top wall and / or the rear wall of the socket base 11 or at the connection between the top wall and the rear wall. After the three-pin socket is installed in the inner box on the wall, it is used to block the water flowing towards the wiring terminal located on the rear wall of the socket base 11 and guide the water to the ground, improving the waterproof performance of the socket.
[0067] Preferably, the first water guide groove 13 is parallel to the socket face cover 12.
[0068] In one embodiment, a strip-shaped convex platform is provided on the top wall and / or the rear wall of the socket base 11 or at the connection between the top wall and the rear wall, and the first water guide groove 13 is opened on the strip-shaped convex platform.
[0069] Further, both ends of the first water guide groove 13 protrude from both sides of the rear wall to guide the water to the ground.
[0070] In one embodiment, a first retaining wall is provided on the top wall and / or the rear wall of the socket base 11 or at the connection between the top wall and the rear wall. The first retaining wall is parallel to the socket face cover 12, and the first water guide groove 13 is formed between the first retaining wall and the socket face cover 12.
[0071] In one embodiment, as Figure 10 shown, a first water guide groove 13 is formed in the top wall of the socket base 11.
[0072] Furthermore, as Figure 10 shown, at least one end of the first water guide groove 13 is bent and connected to a second water guide groove 15, and the second water guide groove 15 is used to drain water to the ground.
[0073] Furthermore, the second water guide groove 15 extends towards the ground and is distributed on at least one side of the rear wall.
[0074] Preferably, as Figure 9 shown, a drain port 14 may also be formed in the bottom wall of the socket base 11 for draining water entering the socket base 11.
[0075] Furthermore, the socket housing is of a square structure, and the drain ports 14 are respectively formed at two corners of the bottom wall of the socket housing.
[0076] Preferably, Figure 11 For another embodiment of the protection door 24, the protection door 24 of this embodiment includes a water guide groove 249, and the water guide groove 249 communicates with the limit groove 248. A water storage space is formed between the limit groove 248 and the limit platform 278. The water guide groove 249 is used to guide water from the limit groove 248 to the bottom of the socket housing and drain it from the drain port 14 of the socket housing. After the socket of this embodiment is installed on the wall, if water enters the L-pole pin hole 21 and the N-pole pin hole 22, it will be guided by the third L-pole pin hole 271 and the third N-pole pin hole 272 on the limit platform 278 into the limit groove 248, introduced into the bottom of the socket housing through the water guide groove 249 and drained, and will not enter the terminal installation groove.
[0077] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which it is usually placed during use. It is only for the convenience of description and does not indicate that the device or element referred to must have a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be construed as indicating relative importance.
[0078] The above content is a further detailed description of the present utility model in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model belongs, without departing from the concept of the present utility model, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope of the present utility model.
Claims
1. A three-pin socket, comprising a socket housing and a socket sleeve assembly. The socket housing includes at least three pin holes, namely an L-pole pin hole (21), an N-pole pin hole (22), and a ground-pole pin hole (23). The socket sleeve assembly includes at least an L-pole socket sleeve (211), an N-pole socket sleeve (221), a ground-pole socket sleeve (231), a protection door (24), and a return spring (25). The L-pole socket sleeve (211), the N-pole socket sleeve (221), and the ground-pole socket sleeve (231) each include two clamping arms, and the clamping arms are provided with clamping surfaces for clamping pins. The return spring (25) is connected to the protection door (24) and is used to drive the protection door (24) to move to a first position where the three pin holes are blocked. The protection door (24) is moved by an external force to overcome the elastic force of the return spring (25) to a second position where it is misaligned with the three pin holes. It is characterized in that The L-pole pin hole (21), the N-pole pin hole (22), and the ground-pole pin hole (23) are rectangular structures. The length edge of the ground-pole pin hole (23) is horizontally arranged in a first direction, and the width edge of the ground-pole pin hole (23) is arranged in a second direction. The first direction is perpendicular to the second direction (2). The length edges of the L-pole pin hole (21) and the N-pole pin hole (22) are inclined with respect to the first direction and the second direction, and the L-pole pin hole (21) and the N-pole pin hole (22) are on the same side of the ground-pole pin hole (23) in the second direction (2). The clamping surfaces of the two clamping arms (224) of the ground-pole socket sleeve (231) are horizontally arranged in the first direction.
2. The three-pin socket according to claim 1, characterized in that, The included angle between the length direction of the ground-pole pin hole (23) and the length direction of the L-pole pin hole (21) is 60°. The included angle between the length direction of the ground-pole pin hole (23) and the length direction of the N-pole pin hole (22) is 60°. The included angle between the length direction of the L-pole pin hole (21) and the length direction of the N-pole pin hole (22) is 60°. The included angle between the clamping surface of the ground-pole socket sleeve (231) and the clamping surface of the L-pole socket sleeve (211) is 60°. The included angle between the clamping surface of the ground-pole socket sleeve (231) and the clamping surface of the N-pole socket sleeve (221) is 60°. The included angle between the clamping surface of the L-pole socket sleeve (211) and the clamping surface of the N-pole socket sleeve (221) is 60°.
3. The three-pin socket according to claim 1, characterized in that, The protection door (24) includes a ground pole shielding area (241) for shielding the ground pole socket (231), an L pole shielding area (242) for shielding the L pole socket (211), and an N pole shielding area (243) for shielding the N pole socket (221). The ground pole shielding area (241) includes an inclined surface (244) for shielding the ground pole pin hole (23). An inclined first notch (247) is formed between the ground pole shielding area (241) and the L pole shielding area (242), and between the ground pole shielding area (241) and the N pole shielding area (243). When the inclined surface (244) is stressed, it can drive the protection door (24) to move to a second position along the second direction (2), so that the first notch (247) is opposite to the corresponding L pole socket (211) and N pole socket (221).
4. The three-pin socket according to claim 3, characterized in that, At least part of the ground pole shielding area (241) protrudes towards the ground pole pin hole (23) to form a first limiting protrusion (245). One side of the first limiting protrusion (245) is provided with the inclined surface, and the other side is provided with a first fixing portion (246) for installing the return spring (25). The L pole shielding area (242) and the N pole shielding area (243) are flat surfaces.
5. The three-pin socket according to claim 3, characterized in that, The socket assembly further includes a first partition (26) located between the protection door (24) and the L pole socket (211), the N pole socket (221), and the ground pole socket (231). The first partition (26) includes a second L pole pin hole (261), a second N pole pin hole (262), and a second ground pole pin hole (263) corresponding to the positions of the L pole pin hole (21), the N pole pin hole (22), and the ground pole pin hole (23). The socket assembly further includes a second partition (27) located between the protection door (24) and the socket housing. The second partition (27) includes a third ground pole pin hole (273) corresponding to the second ground pole pin hole (263), a third L pole pin hole (271) corresponding to the second L pole pin hole (261), and a third N pole pin hole (272) corresponding to the second N pole pin hole (262). The second partition (27) covers the first partition (26), and a sliding space for the protection door (24) is formed between the second partition (27) and the first partition (26).
6. The three-pin socket according to claim 5, characterized in that, The width of the second ground pole pin hole (263) is greater than the width of the ground pole pin hole (23), so that at least part of the ground pole socket (231) extends into the second ground pole pin hole (263).
7. The three-pin socket according to claim 5, characterized in that, On the surface of the second partition (27) facing the first partition (26), there are two opposite limiting side plates (277) and two limiting platforms (278). The third L pole pin hole (271) and the third N pole pin hole (272) are respectively provided on the two limiting platforms (278). The protection door (24) is limited between the two limiting side plates (277), and when the protection door (24) is in the first position, the L pole shielding area (242) and the N pole shielding area (243) abut against the two limiting platforms (278).
8. The three-prong socket according to claim 7, characterized in that, The protection door (24) includes two limiting grooves (248) respectively located on the N-pole shielding area (243) and the L-pole shielding area (242). After the limiting platform (278) abuts against the protection door (24) in the first position, it wraps the corresponding limiting groove (248).
9. The three-pin socket according to claim 8, characterized in that, The protection door (24) includes a water guide groove (249). The water guide groove (249) communicates with the limiting groove (248) and is used to introduce the water in the limiting groove (248) into the socket housing. A drain port (14) is provided on the bottom wall of the socket housing for discharging the water entering the socket housing.
10. The three-pin socket according to claim 5, characterized in that, The socket housing includes a socket base (11) and a socket face cover (12). The earth pin hole (23), N-pole pin hole (22), and L-pole pin hole (21) are provided on the socket face cover (12). The socket sleeve assembly is installed in the socket base (11). The socket base (11) includes at least three terminal mounting grooves, a first partition mounting groove, and a second partition mounting groove. The L-pole socket sleeve (211), N-pole socket sleeve (221), and earth-pole socket sleeve (231) and the corresponding three terminals (223) are respectively installed in the three terminal mounting grooves. The first partition (26) is installed in the first partition mounting groove above the three terminal mounting grooves. The second partition (27) is installed in the second partition mounting groove above the first partition (26) and does not protrude from the socket base (11).
11. The three-pin socket according to claim 10, characterized in that, A strip-shaped first water guide groove (13) is provided on the outer side wall of the socket base (11). The first water guide groove (13) is at least located on the top wall of the socket base (11) and is configured to block the water flowing towards the terminals located on the rear wall of the socket base (11).
12. The three-pin socket according to claim 1, characterized in that, The clamping arms (224) of the earth-pole socket sleeve (231), L-pole socket sleeve (211), and N-pole socket sleeve (221) all include a second notch (222).
13. The three-pin socket according to claim 6, characterized in that, The earth-pole socket sleeve (231) includes a second notch (222). The second notch (222) is located on one side of the two clamping arms (224). The second earth-pin hole (263) includes a communicating third notch (2631) and a fourth notch (2632). The area of the third notch (2631) is smaller than the area of the fourth notch (2632). The earth-pole socket sleeve (231) is partially located in the fourth notch (2632). The earth pin passes through the third notch (2631) and the fourth notch (2632) to be connected to the earth-pole socket sleeve (231).