Appliance coupler with combined structure

Abstract

The utility model discloses an appliance coupler with a combined structure, and belongs to the field of electric connectors. The appliance coupler comprises an appliance input socket and an appliance connecting plug, the appliance input socket comprises an upper cover, a core electric connection device and a bottom plate; the core electric connection device comprises a glue injection cover, a glue injection bottom box and a bolt assembly; the plug pin assembly comprises a plug pin seat, a plug pin, a printed circuit board and a fast current fuse. The printed circuit board can be welded with a fast current fuse to realize overheating and overcurrent protection; the appliance connecting plug comprises a core box base, a core box upper cover, a plug bush and a connecting wire; the plug bush is arranged in a second through hole of the core box base, and the aperture and the length of the second through hole are greater than the size of the plug bush; the plug bushes and a small part of connecting wires connected with the plug bushes are arranged in the core box base, are not fixed and can float; when the appliance connecting plug is plugged with the appliance input socket, the plug bush is positioned by the corresponding bolt, so that the axial position assembly error of the bolt and the plug bush can be greatly accommodated.

Description

Technical Field

[0001] The utility model relates to the field of electrical connectors, in particular to an appliance coupler with a combined structure. Background Art

[0002] Although the existing couplers have different structural forms, they have one thing in common: the plug pins and the socket sleeves are respectively fixed in the appliance input socket and the appliance connection plug, and the positional errors between the plug pins and the positional errors between the socket sleeves are different. When the appliance input socket and the appliance connection plug are plugged together, it is very easy for the plug pins to be non-coaxial with the corresponding socket sleeves, resulting in poor fit, which may increase the contact resistance; another common point is that they only have the function of electrical connection, and as an electric heating appliance coupler, the function is single.

[0003] In view of this, the solution of the present utility model is specifically proposed. Summary of the Invention

[0004] The purpose of the present utility model is to provide an appliance coupler with a combined structure, which can effectively avoid the non-coaxiality between the plug pins and the corresponding socket sleeves and the phenomenon of poor fit; at the same time, it has electrical functions such as over-current protection.

[0005] The present utility model is implemented as follows: an appliance coupler with a combined structure includes an appliance input socket and an appliance connection plug. The appliance input socket includes an upper cover, a core electrical connection device and a bottom plate; the appliance connection plug includes a core box base, a core box upper cover, a socket sleeve and a connecting wire. The appliance input socket and the appliance connection plug are connected by a plugging method.

[0006] Further, the core electrical connection device of the appliance input socket is arranged between the bottom plate and the upper cover; the core electrical connection device consists of a glue injection cover, a glue injection bottom box and a plug pin assembly to form a box-shaped structure, and the insulation and waterproof effect can be achieved through glue injection;

[0007] Further, the plug pin assembly of the core electrical connection device includes a plug pin seat, a plug pin, a printed circuit board and a fast current fuse. The plug pin is inserted into a first through hole prefabricated in the plug pin seat, and the tail of the plug pin is welded to the printed circuit board. The fast current fuse is also welded to the printed circuit board and is electrically connected to the plug pin; the printed circuit board welds the fast current fuse (the fast current fuse can be replaced by other fuses such as a resistive fuse, a thermal fuse or a rectifier diode) to achieve overheat and over-current protection; the printed circuit board is placed in the glue injection cavity, and the glue injection cavity is provided with a first positioning block, and the printed circuit board is correspondingly provided with a first positioning hole and is inserted into the first positioning block through the first positioning hole.

[0008] Further, a first partition groove is provided on the same side of the socket of the appliance input socket as the plug pin, and the first partition groove is disposed between the first through holes of the socket. The socket is provided with a frustum, which is disposed on the same side as the plug pin, and the plug pin passes through the frustum through the prefabricated first through hole.

[0009] Further, one end of the glue injection bottom box of the appliance input socket is provided with a first partition board with a through groove, and second partition boards are symmetrically arranged at both ends of the first partition board along the edge direction of the glue injection bottom box; the plug assembly is snap-connected to the glue injection bottom box, detachable, and forms a glue injection inner cavity with the first partition board and the second partition board; the shape of the glue injection cover matches the shape of the glue injection inner cavity and is tightly snap-connected to the top of the glue injection inner cavity.

[0010] Further, the glue injection bottom box of the appliance input socket is further provided with elastic columns with protrusions, and the elastic columns are disposed on both sides of the glue injection bottom box and the protrusions are oppositely arranged, and the elastic columns are snap-connected to the arc-shaped grooves provided in a matching manner with the core box base by means of the protrusions.

[0011] Further, the bottom plate and the upper cover of the appliance input socket are respectively fixedly connected to the core electrical connection device by means of snap-fastening.

[0012] Further, the appliance connection plug includes a core box base, a core box upper cover, a socket and a connecting wire. The core box base and the core box upper cover are buckled and connected to each other. The socket is disposed in the second through hole of the core box base, and the aperture of the second through hole is larger than the maximum outer dimension after the elastic deformation of the socket, and the length of the second through hole is slightly larger than the length of the socket; a box-shaped wire accommodating cavity communicating with the second through hole is formed after the core box base and the core box upper cover are buckled. A small part of the connecting wire connecting the socket is inside the core box base, not fixed and can float. A cover eaves structure is provided in a matching manner at the connection between the core box base and the core box upper cover.

[0013] Further, the core box upper cover of the appliance connection plug is provided with a dovetail groove and a positioning post, and the core box base is correspondingly provided with a dovetail guide rail and a positioning blind hole. The core box upper cover is slidably buckled to the core box base through the dovetail groove and the positioning post is inserted into the positioning blind hole to achieve positioning.

[0014] Further, a backstop block is provided on the core box upper cover relative to the second through hole. The end face of the backstop block is in the same plane as one end of the second through hole and the backstop block does not completely cover the second through hole. Its function is that when the core box base and the core box upper cover are in a buckled state, it prevents the socket from retreating, and the socket only moves within the second through hole.

[0015] The beneficial effects of the present utility model are:

[0016] 1. The utility model is provided with a glue injection cavity, in which a printed circuit board is arranged. The plug pins are welded on the printed circuit board, and a fast current fuse (the fast current fuse can be replaced by other fuses such as a resistive fuse or a thermal fuse, or a rectifier diode) is welded on the printed circuit board to achieve overheat and overcurrent protection;

[0017] 2. By pouring hot melt adhesive into the glue injection cavity, the printed circuit board is sealed in the glue injection cavity, which improves the insulation and waterproof reliability and increases the use safety;

[0018] 3. The plug pins of the utility model are fixed in the appliance input socket. The socket sleeve and a small part of the connecting wire connecting the socket sleeve are arranged in the core box base, not fixed and can float. When the appliance connecting plug is inserted into the appliance input socket, the socket sleeve is positioned by the corresponding plug pin, which can accommodate a relatively large assembly error in the axial position of the plug pin and the socket sleeve, maintain the elasticity of the socket sleeve, ensure good contact between the plug pin and the socket sleeve, and avoid the influence of contact resistance on the heating appliance;

[0019] 4. All components of the utility model are connected by snap fasteners without screws, making the assembly more rapid and convenient;

[0020] 5. The plug pin seat of the appliance input socket of the utility model is provided with a first partition groove and a round table, which increases the creepage distance;

[0021] 6. The utility model is provided with elastic columns in the appliance input socket and matching arc grooves at corresponding positions on the appliance connecting plug to form the insertion and extraction (locking damping) force. At the same time, it is convenient to adjust the size of the insertion and extraction force.

[0022] 7. The upper cover of the core box and the core box base of the utility model are provided with a "cover eaves" structure to prevent the molten plastic in the plastic coating process from infiltrating into the wire accommodating cavity and the second through hole along the assembly gap between the upper cover of the core box and the core box base, and solidifying after cooling to cause the socket sleeve to be fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a schematic structural diagram after the plug-in connection of the utility model;

[0025] Figure 2 It is a schematic structural diagram of the core electrical connection device of the utility model when the plug pin assembly is not assembled;

[0026] Figure 3Schematic diagram of the core electrical connection device of the present utility model without the glue injection cover assembled;

[0027] Figure 4 Schematic diagram of the structure of the core electrical connection device of the present utility model;

[0028] Figure 5 Schematic diagram of the plug pin assembly structure of the present utility model;

[0029] Figure 6 Schematic diagram of the structure of the appliance connection plug without the core box upper cover assembled of the present utility model;

[0030] Figure 7 Schematic diagram of the structure of the core box upper cover of the present utility model;

[0031] Figure 8 Schematic diagram of the structure of the upper cover of the appliance input socket of the present utility model;

[0032] Figure 9 Schematic diagram of the structure of the bottom plate of the appliance input socket of the present utility model;

[0033] Figure 10 Assembly drawing of the appliance input socket of the present utility model.

[0034] Reference numerals in the attached drawings:

[0035] 1. Appliance input socket; 11. Upper cover; 12. Core electrical connection device; 121. Glue injection bottom box; 1211. Elastic column; 122. Glue injection cover; 1221. Glue injection inner cavity; 1222. First partition; 1223. Second partition; 1224. First positioning block; 123. Plug pin assembly; 1231. Plug pin; 1232. First slot; 1233. Round platform; 1234. Plug pin seat; 13. Bottom plate; 2. Appliance connection plug; 21. Core box base; 211. Second through hole; 212. Positioning blind hole; 213. Dovetail guide rail; 22. Core box upper cover; 221. Dovetail groove; 23. Socket sleeve; 24. Connecting wire. Detailed implementation manners

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0037] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0038] As Figures 1-10 , the present utility model provides an appliance coupler with a combined structure, which includes an appliance input socket 1 and an appliance connection plug 2. The appliance input socket 1 includes an upper cover 11, a core electrical connection device 12 and a bottom plate 13, and the core electrical connection device 12 is arranged between the bottom plate 13 and the upper cover 11. The appliance connection plug 2 includes a core box base 21, a core box upper cover 22, a socket 23 and a connecting wire 24, and the core box base 21 and the core box upper cover 22 are buckled and connected to each other. The appliance input socket 1 and the appliance connection plug 2 are connected by a plugging method. In this solution, all the components that need to be electrically connected in the appliance input socket 1 are integrated on the core electrical connection device 12, making the assembly more convenient and eliminating the need for special installation of each component.

[0039] As a preferred connection method, the fixing method of the above-mentioned upper cover 11, core electrical connection device 12 and bottom plate 13 can adopt a snap connection method. In the specific assembly process, the snap connection method is more convenient, and this method abandons the conventional screws.

[0040] In the actual product design, the core electrical connection device 12 at least further includes a glue injection cover 122, a glue injection bottom box 121 and a plug pin assembly 123. One end of the glue injection bottom box 121 is provided with a first partition plate 1222 with a through groove, and at both ends of the first partition plate 1222, along the edge direction of the glue injection bottom box 121, second partition plates 1223 are symmetrically arranged; the plug pin assembly 123 is snap-connected to the glue injection bottom box 121, detachable, and forms a glue injection inner cavity 1221 with the first partition plate 1222 and the second partition plates 1223; the shape of the glue injection cover 122 matches the shape of the glue injection inner cavity 1221 and is tightly snap-connected to the top of the glue injection inner cavity 1221. The components that need to be electrically connected in the appliance input socket 1 are placed into the glue injection inner cavity 1221. The glue injection cover 122 is provided with an injection hole, and hot melt glue is poured through the injection hole of the glue injection cover 122. After the hot melt glue cools down, the aforementioned electrically connected components are fixed in the glue injection inner cavity 1221, and it can play a role in insulation and waterproofing.

[0041] Specifically, the plug assembly 123 of the appliance input socket 1 includes a plug seat 1234, a plug 1231, a printed circuit board and a fast current fuse. The plug 1231 is inserted into a prefabricated first through hole of the plug seat 1234, and the tail of the plug 1231 is welded to the printed circuit board. The printed circuit board is welded with the fast current fuse. In the utility model, the fast current fuse can be replaced by other fuses such as a resistive fuse, a thermal fuse, or a rectifier diode, and the fast current fuse realizes overheating and overcurrent protection. The fast current fuse is also welded to the printed circuit board and maintains electrical connection with the plug 1231; the printed circuit board is placed in the glue injection cavity 1221, and the glue injection cavity 1221 is provided with a first positioning block 1224, and the printed circuit board is correspondingly provided with a first positioning hole and plugged into the first positioning block 1224 through the first positioning hole.

[0042] As an improvement, for convenience, the first partition groove 1232 is provided on the same side of the plug seat 1234 of the appliance input socket 1 as the plug 1231, and the first partition groove 1232 is provided between the first through holes of the plug seat 1234. The glue-injected bottom box 121 is divided into two parts by the plug seat 1234, one part forms a glue-injected inner cavity 1221 with the first partition plate 1222 and the second partition plate 1223 for accommodating the core electrical connection device 12; the other part is used to accommodate the plug 1231, and the third partition plate is also provided in the part for isolating the plug 1231, such as Figure 2 As shown, it can be specifically set to 2 pairs. After the latch seat is installed, the third partition is inserted into the first partition groove 1232. Furthermore, the cross-sectional shape of the third partition matches the shape of the first partition groove 1232, so that after the latch seat 1234 is installed, the third partition has a certain fixing effect on it. Figure 2 It can be seen that the cross-sectional shape of the third partition in this embodiment is a triangle at the bottom and a rectangular structure at the top.

[0043] As a further improvement of the solution, a fixing piece extending along the direction of the latch 1231 is provided at the bottom of the latch seat 1234, such as Figure 4 As shown, a fixing plate is provided at a corresponding position of the glue-injected bottom box 121, and after the bolt seat 1234 is assembled, the fixing member and the fixing plate are fitted together. The setting of the fixing member increases the contact area between the bolt seat 1234 and the glue-injected bottom box 121, making it more stable after assembly and not easy to fall out of the assembly position after assembly.

[0044] Furthermore, in this embodiment, a frustum 1233 is provided on the pin base 1234 of the appliance input socket 1. The frustum 1233 is provided on the same side of the pin 1231, and the pin 1231 passes through the frustum 1233 through the prefabricated first through hole. Specifically, the frustum 1233 is provided in each area separated by the first partition groove 1232, such as Figure 5 As shown, the frustum 1233 is provided in three areas separated by the first partition groove 1232. The setting of the frustum 1233 makes the installation of the pin 1231 more stable, increases the creepage distance, and helps to improve the electrical safety of the product.

[0045] Even further, as Figures 2-3 shown, the glue injection bottom box 121 of the appliance input socket 1 is further provided with elastic columns 1211 with protrusions. The elastic columns 1211 are provided on both sides of the glue injection bottom box 121 and the protrusions are arranged oppositely. The shapes of the protrusions of the elastic columns include but are not limited to arc, triangle and square. The elastic columns are engaged with the arc-shaped grooves provided in a matching manner with the protrusions on the core box base 21. Specifically, the elastic columns 1211 are provided on the outermost sides of the pins 1231 after assembly. When the appliance connection plug 2 and the pins 1231 are inserted into each other, the elastic columns 1211 are engaged with the arc-shaped grooves. The setting of the elastic columns 1211 can facilitate the insertion and extraction force when the appliance input socket 1 and the appliance connection plug 2 are inserted and make it within a reasonable range.

[0046] As an improvement, the elastic column 1211 in this embodiment does not require a tight snap fit with the arc-shaped groove, allowing the elastic column 1211 to have a certain degree of movement space in the arc-shaped groove. This design reduces the manufacturing difficulty and saves costs on the one hand, and on the other hand, it is not easy to damage components when the user plugs and unpluggs the coupler of the present utility model, increasing the service life of the coupler of the present utility model. The design concept of this part also runs through the assembly of the printed circuit board inserted into the first positioning block 1224, the pin socket 1234 snapped onto the glue injection bottom box 121, and the insertion sleeve 23 and the core box base 21. Since the pin socket 1234 and the printed circuit board have a certain degree of movement space at their respective snap positions, the insertion sleeve 23 is arranged in the second through hole of the core box base 21, the diameter of the second through hole is larger than the maximum outer dimension after the elastic deformation of the insertion sleeve, and the length of the second through hole is slightly larger than the length of the insertion sleeve; after the core box base 21 and the core box upper cover 22 are snapped together, a box-shaped wire accommodating cavity communicating with the second through hole is formed; the insertion sleeve 23 and a small part of the connecting wire 24 connecting the insertion sleeve 23 are not fixed and can float in the appliance connection plug 2, and the insertion sleeve 23 is positioned by the pin 1231 corresponding to the appliance input socket 1, which can accommodate a relatively large assembly error in the axial position of the pin 1231 and the insertion sleeve 23, maintain the elasticity of the insertion sleeve 23, ensure good contact between the pin 1231 and the insertion sleeve 23, avoid the influence of contact resistance on the heating appliance, and also increase the service life of the coupler of the present utility model.

[0047] For the appliance connection plug 2, the core box upper cover 22 is provided with a dovetail groove 221 and a positioning post, and the core box base 21 is correspondingly provided with a dovetail guide rail 213 and a positioning blind hole 212. The core box upper cover 22 is slidably snapped and positioned with the core box base 21 through the dovetail groove 221 and the positioning post is inserted into the positioning blind hole 212. Specifically, as Figure 6As shown, the core box base 21 is provided with second through holes 211, which are three in number in this embodiment. The ends of three connecting wires 24 are each fixedly connected with a socket 23. The socket 23 is inserted into the second through hole 211. Fourth partitions are arranged at two spaced positions in the middle of the second through hole. The positioning blind holes 212 are arranged on the fourth partitions, and positioning post through grooves are also arranged on the fourth partitions. During the process of buckling the core box upper cover 22 and the core box base 21, the dovetail groove 221 of the core box upper cover 22 is snapped into the dovetail guide rail 213 of the core box base 21 and starts to slide. The positioning post of the core box upper cover 22 contacts and slides along the positioning post through groove until it is inserted into the positioning blind hole, completing the assembly. As an optimized solution, a coping structure is provided in a matching manner at the connection between the core box upper cover 22 and the core box base 21 to prevent the plastic coating material in a heated and molten state from seeping into the wire accommodating cavity and the second through hole along the assembly gap between the core box upper cover 22 and the core box base 21 during the plastic coating process, and solidifying after cooling to cause the socket 23 to be fixed. The "coping" structure described in the present utility model is similar to the coping on a wall, that is, the part protruding from the wall on the roof. In this solution, the provision of the coping increases the contact area between the core box upper cover 22 and the core box base 21. When the appliance connection plug is assembled and the plastic coating process is carried out on it, the penetration of the plastic coating material in a heated and molten state can be prevented.

[0048] Furthermore, a retaining block is arranged at one end of the core box upper cover 22 of the appliance connection plug close to the second through hole. When the core box base 21 and the core box upper cover 22 are in a buckled state, the end face of the retaining block is in the same plane as one end of the second through hole 211 and the retaining block does not completely cover the second through hole 211, preventing the socket from retracting, and the socket can only move within the second through hole. Specifically, the socket 23 is a metal round tube with a clamping tail. An opening is provided on the round tube to maintain metal elasticity; the clamping tail of the socket 23 is electrically connected to the connecting wire 24.

[0049] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent replacements or changes, and all should be covered by the protection scope of the present invention.

Claims

1. An appliance coupler with a combined structure, comprising an appliance input socket and an appliance connection plug, wherein the appliance input socket and the appliance connection plug are connected by plugging. The appliance connection plug includes a core box base, a core box upper cover, socket sleeves and a connecting wire, characterized in that, The core box base and the core box upper cover are buckled and connected to each other and are provided with a matching eaves structure; the socket sleeve is arranged in the second through hole of the core box base, the aperture of the second through hole is larger than the maximum outer dimension after the elastic deformation of the socket sleeve, and the length of the second through hole is slightly larger than the length of the socket sleeve; a box-shaped wire accommodating cavity communicating with the second through hole is formed after the core box base and the core box upper cover are buckled; a small part of the connecting wire connecting the socket sleeve is arranged in the core box base, not fixed and floating.

2. The appliance coupler with a combined structure according to claim 1, characterized in that, The appliance input socket includes an upper cover, a core electrical connection device and a bottom plate, and the core electrical connection device is arranged between the bottom plate and the upper cover; the core electrical connection device includes a potting cover, a potting bottom box and a pin assembly; the pin assembly includes a pin base, a pin, a printed circuit board and a fuse; the fuse is welded on the printed circuit board to achieve overheat and overcurrent protection; wherein, the fuse is at least one of a fast current fuse, a resistive fuse, a thermal fuse or a rectifier diode.

3. The appliance coupler with a combined structure according to claim 2, characterized in that, The core electrical connection device is a box-shaped structure and can achieve insulation and waterproof effects through potting.

4. The appliance coupler with a combined structure according to claim 2, characterized in that, The bottom plate and the upper cover are respectively fixedly connected to the core electrical connection device by snap-fastening.

5. The appliance coupler of a combined structure according to claim 2, characterized in that One end of the potting bottom box is provided with a first partition plate with a through groove, and second partition plates are symmetrically arranged at both ends of the first partition plate along the edge direction of the potting bottom box; the pin assembly is clamped on the potting bottom box, detachable, and forms a potting inner cavity with the first partition plate and the second partition plates; the shape of the potting cover matches the shape of the potting inner cavity and is tightly clamped on the top of the potting inner cavity.

6. The appliance coupler with a combined structure according to claim 2, characterized in that, The pin base is provided with a prefabricated first through hole, the pin is inserted into the prefabricated first through hole of the pin base, and the tail of the pin is welded to the printed circuit board; the fast current fuse is electrically connected to the pin; the printed circuit board is placed in the potting inner cavity, the potting inner cavity is provided with a first positioning block, and the printed circuit board is correspondingly provided with a first positioning hole and is inserted into the first positioning block through the first positioning hole.

7. The appliance coupler with a combined structure according to claim 6, characterized in that, A first partition groove is arranged on the same side of the pin base as the pin, and the first partition groove is arranged between the first through holes of the pin base; the pin base is provided with a frustum, the frustum is arranged on the same side of the pin, and the pin passes through the frustum through the prefabricated first through hole.

8. The appliance coupler with a combined structure according to Claim 5, characterized in that, The potting bottom box is further provided with elastic columns with protrusions, the elastic columns are arranged on both sides of the potting bottom box and the protrusions are arranged oppositely, and the elastic columns are clamped with the arc grooves matched with the core box base by the protrusions.

9. The appliance coupler with a combined structure according to claim 1, characterized in that, The core box upper cover is provided with a dovetail groove and a positioning post, the core box base is correspondingly provided with a dovetail guide rail and a positioning blind hole, and the core box upper cover is slidably buckled with the core box base through the dovetail groove and the positioning post is inserted into the positioning blind hole to achieve positioning.

10. The appliance coupler with a combined structure according to claim 1, characterized in that, The core box base is provided with a second through hole, the socket is arranged in the second through hole, and the core box upper cover is provided with a backstop block. When the core box base and the core box upper cover are in a buckled state, the end face of the backstop block and one end of the second through hole are in the same plane and the backstop block partially covers the second through hole.

Images