Joint box type crimping wire branch connector

Abstract

The utility model discloses a card pressure electric wire branch connector for junction box belongs to electric wire connection technical field. The connector is mainly by the upper connecting body and lower connecting body of carding composition, and the lower connecting body is the U shape injection molding structure of embedding elastic metal sheet, is equipped with dry line groove and card slot, and the upper connecting body is the I shape injection molding structure, and the integrated terminal cavity, screw via hole and separation gap, and the copper terminal, pointed end screw, flat end screw and branch line end cover are used in collocation. The utility model adopts the upper and lower card pressure type assembly structure, and adapts the narrow installation space of junction box, and realizes the conductive communication through the pointed end screw puncture dry line insulation, and need not cut off the power supply dry line. Single device can complete phase, zero, ground three wire branch connection, effectively prevents dry line joint power loss, reduces copper material waste, simplifies wiring installation process, promotes construction efficiency and wiring quality consistency, can be widely applied to the lighting distribution scene of pipe -through junction box.

Description

TECHNICAL FIELD

[0001] The present application relates to a cable branch connector, in particular to a clamp-type cable branch connector for a junction box. BACKGROUND

[0002] In the lighting distribution for large number of lighting installations in airports, stations, parking lots, etc., the distribution is mostly installed by using the method of cable duct junction box. In the traditional installation method, the parallel connection and series connection method is almost used, i.e. three power supply cables are respectively inserted into the cable ducts at both ends of the junction box, and branch joints are made in the junction box. In this connection, the power supply cables at two adjacent junction boxes are cut off, and the three cables of incoming line, outgoing line and lamp line are twisted and wound with insulating tape or connected into a branch joint by using a terminal. Three branch joints are needed in the junction box to respectively lead out the phase, zero and ground for supplying the lighting lamp. The outgoing line of the junction box is used as the incoming line of the next junction box, and the second set of branch joints is repeatedly made. The so-called quick cable connector products are also used in the cable duct junction box installation, such as the 221 and 773 series cable connectors represented by German WKK.

[0003] However, in these traditional methods, the power supply trunk is cut off, which will cause power loss at the joint, and when a fault occurs at the previous joint, it will affect the power supply of the lighting lamp. This method is not only complicated, time-consuming and laborious, but also messy in the junction box, and a lot of cables are wasted at the joint.

[0004] From the technical point of view, the above-mentioned method may not have many problems in civil buildings, because the number of parallel connection and series connection is small, and generally no more than ten lamps in a loop. However, it is difficult to apply to a loop of dozens of lamps, such as comprehensive pipe gallery and waiting hall. From the environmental protection point of view, the power loss at the joint and the waste of cables caused by cutting off the cable duct and parallel connection are not encouraged. From a loop to the whole project or even the whole country, the loss and waste are amazing. SUMMARY

[0005] The purpose of the present application is to overcome the above-mentioned deficiencies in the prior art, and to provide a clamp-type cable branch connector for a junction box with continuous T-joint of trunk.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: 1. A clamp-type cable branch connector for a junction box, comprising a lower connecting body and an upper connecting body, which are clamped together by a clamping method; wherein the upper connecting body comprises three copper terminals, three pointed end screws, three flat end screws and a branch line end cover. The lower connector is a whole formed by embedding the elastic metal sheet during injection molding, and has a U-shaped appearance. The elastic arms on both sides can be opened to both sides under the action of external force, and return to the original state when the external force disappears. One clamping groove is arranged on each elastic arm. The lower part of the lower connector is provided with three parallel trunk line grooves, and wire clamping blocks are arranged at both ends of the trunk line grooves.

[0007] The upper connector is injection molded, and the insertion guide grooves are arranged on the left and right sides of the front and rear end faces on the outside. The clamping wedges are arranged on the left and right sides of the lower position of the longitudinal middle upper end face, and the separation notches are arranged on the left and right sides of the position of the longitudinal middle upper end face. The inside of the upper connector is provided with three parallel terminal cavities, and the outside is a branch line end cap slot for inserting the branch line end cap. The terminal cavity is used for placing the copper terminal, and the upper part is provided with a sharp end screw upper via hole and a flat end screw via hole, and the lower part is provided with a sharp end screw lower via hole.

[0008] The copper terminal is provided with a trunk line threaded hole, and the whole penetrates the copper terminal, and is provided with a branch line threaded hole and a branch line hole perpendicular to and communicating with the branch line threaded hole.

[0009] The branch line end cap is provided with three branch line via holes.

[0010] The upper connector can be inserted into the lower connector. The insertion guide groove guides the insertion of the upper connector along the elastic arms of the lower connector. When the lower part of the clamping wedge of the lower connector reaches the upper end face of the elastic arm, it is stopped. At this time, the clamping wedge is pressed down, the elastic arm is opened to both sides, and the clamping wedge is inserted into the clamping groove of the lower connector. When the clamping wedge enters the clamping groove, the elastic arm returns to the original state, the clamping wedge enters the clamping groove, and the upper connector and the lower connector are clamped together. This can resist the upward and downward thrust generated by the sharp end screw penetrating the trunk line wire, and provide physical support for the trunk line connection. After the upper connector and the lower connector are clamped, in order to open them, the elastic arms can be pushed away by means of the separation notches on the upper connector, and the upper connector can be taken out.

[0011] 2. The elastic metal sheet also has a U-shaped appearance, and one clamping groove slot is arranged on each of the left and right sides. The clamping groove slot is the same shape as the clamping groove on the lower connector, and slightly smaller in size. In order to accurately embed the elastic metal sheet in the lower connector during injection molding, and to ensure the relative position after embedding, an embedding positioning hole is arranged at the bottom of the elastic metal sheet, which is used for installing in the mold fixed mold during injection molding of the lower connector. In order to tightly embed into one, a plurality of embedding process holes are arranged on the elastic metal sheet, which will be filled with injection plastic during injection molding of the lower connector.

[0012] 4、The three copper terminals are respectively inserted into the three terminal cavities of the upper connecting body, the branch line end cover is inserted into the branch line end cover notch of the upper connecting body, at this time, the upper hole of the sharp end screw, the lower hole of the sharp end screw and the trunk thread hole on the copper terminal are perpendicular to the same vertical axis, the axis is aligned and perpendicular to the axis of the trunk slot of the lower connecting body below after the upper connecting body and the lower connecting body are buckled, and is also aligned and perpendicular to the axis of the trunk wire in the trunk slot; the flat end screw hole on the terminal cavity and the branch thread hole on the copper terminal are perpendicular to the same vertical axis; the three branch line holes on the branch line end cover are respectively aligned with the horizontal axis of the three branch line holes on the copper terminal; in this way, the three sharp end screws can be respectively screwed into the trunk thread holes on the copper terminals through the upper holes of the three sharp end screws on the copper terminal cavities, and continue to be screwed into the lower holes of the sharp end screws; the three flat end screws are respectively screwed into the branch thread holes on the copper terminals through the flat end screw holes on the three copper terminal cavities.

[0013] The utility model discloses the structure above has the following beneficial effects: 1、Up and down clamping structure, facilitate the installation of junction box narrow space.

[0014] 2、Single branch connector can realize phase, zero, ground three -wire branch connection.

[0015] 3、Trunk line is continuous, and same power supply loop can be completed by once threading, need not thread one by one.

[0016] 4、Trunk line is not cut off branch connection, and power loss of trunk joint is prevented.

[0017] 5、Simplify installation, greatly shorten the installation time, and quality is controllable, and it is favorable to realize installation standardization.

[0018] 6、Save wire, reduce copper material waste. DRAWINGS

[0019] Figure 1 It is the utility model lower connecting body perspective drawing.

[0020] Figure 2 It is the utility model elastic sheet perspective drawing.

[0021] Figure 3 It is the utility model upper connecting body perspective drawing.

[0022] Figure 4 It is the utility model upper connecting body perspective drawing.

[0023] Figure 5 It is the utility model branch line end cover perspective drawing.

[0024] Figure 6 The utility model upper connecting body assembly perspective drawing.

[0025] Figure 7 is a process state perspective view of the upper connecting body being inserted into the lower connecting body of the utility model.

[0026] Figure 8 is an A-A elevation sectional view of the utility model Figure 7 .

[0027] Figure 9 is a perspective view of the utility model after the upper connecting body is inserted into the lower connecting body and buckled.

[0028] Figure 10 is a B-B elevation sectional view of the utility model Figure 9 .

[0029] Figure 11 is a perspective view of the utility model after the trunk electric wire and branch electric wire are installed.

[0030] Figure 12 is a C-C elevation sectional view of the utility model Figure 10 after the trunk electric wire and branch electric wire are installed.

[0031] Figure 13 is a perspective view of the utility model installation step one.

[0032] Figure 14 is a perspective view of the utility model installation step two.

[0033] Figure 15 is a perspective view of the utility model installation step three.

[0034] Figure 16 is a perspective view of the utility model installation step four.

[0035] Figure 17 is a perspective view of the utility model installation step five.

[0036] Figure 18 is a perspective view of the utility model installation step six.

[0037] Figure 19 is a perspective view of the utility model installation step seven.

[0038] In the figure: 1, lower connector; 11, elastic double arms; 12, clamping groove; 13, main line groove; 14, wire clamping block; 2, upper connector; 21, insertion guide groove; 22, clamping wedge; 23, terminal cavity; 24, upper via hole of pointed screw; 25, lower via hole of pointed screw; 26, via hole of flat end screw; 27, branch line end cover notch; 28, separation notch; 3, elastic metal sheet; 31, clamping groove notch; 32, embedded positioning hole; 33, embedded process hole; 4, branch line end cover; 41, branch line via hole; 5, copper terminal; 51, main line threaded hole; 52, branch line threaded hole; 53, branch line hole; 6, pointed screw; 7, flat end screw; 8, main line wire; 81, main line conductor; 82, main line insulation; 9Z, lamp wire; 9, branch line wire; 91, branch line conductor; 10, wire pipe; 11, junction box; 12, hexagonal screwdriver. DETAILED DESCRIPTION

[0039] The embodiments of the utility model are described in conjunction with the drawings.

[0040] Figures 1-12 The structure, composition and principle of the utility model are described.

[0041] Figures 1-2 As shown in the figure, the lower connector 1 is a whole formed by embedding the elastic metal sheet 3 during injection molding, and has a U-shaped appearance. The left and right elastic double arms 11 can be opened to both sides under the action of external force, and can restore to the original state when the external force disappears. Above the elastic double arms 11 of the lower connector 1, one clamping groove 12 is arranged respectively. At the lower part of the lower connector 1, three parallel main line grooves 13 are arranged. Wire clamping blocks 14 are arranged at both ends of the main line grooves 13.

[0042] The elastic metal sheet 3 also has a U-shaped appearance, and one clamping groove notch 31 is arranged on the left and right sides. The clamping groove notch 31 has the same shape as the clamping groove 12 on the lower connector 1 and is slightly smaller in size. In order to accurately embed the elastic metal sheet 3 during injection molding of the lower connector 1 and ensure the relative position after embedding, an embedded positioning hole 32 is arranged at the bottom of the elastic metal sheet 3, which is used for installing the mold fixed mold during injection molding of the lower connector 1. In order to tightly embed into a whole, a plurality of embedded process holes 33 are arranged on the elastic metal sheet 3. The embedded process holes 33 will be filled and flattened by injection molding material during injection molding of the lower connector 1.

[0043] Figures 3-6 As shown in the figure, the structure and assembly process of the upper connector 2 are shown.

[0044] The upper connector 2 is composed of three copper terminals 5, three pointed screws 6, three flat end screws 7 and a branch line end cover 4.

[0045] The upper connector 2 is made of injection molding, and the left and right sides of the front and back ends of the outer part are provided with insertion guide grooves 21 for guiding the upper connector 2 into the lower connector 1; the left and right sides of the lower position of the longitudinal middle upper end are provided with clamping wedges 22; the left and right sides of the longitudinal middle upper end are provided with separation notches 28.

[0046] The upper connector 2 is in a horizontal I-shaped form, the I-shaped vertical picture width is slightly smaller than the inner width of the elastic arms 11 of the lower connector 1, and one clamping wedge 22 is arranged at each side of the middle part of the I-shaped vertical picture, the thickness of the clamping wedge 22 is equal to the thickness of a single arm of the elastic arms 11, and the height and length of the clamping wedge 22 are slightly smaller than the height and width of the upper clamping groove 12 of the lower connector 1, so that the clamping wedge 22 can be easily accommodated in the clamping groove 12; the left and right extensions of the front and back two horizontals of the I-shaped vertical picture form the insertion guide grooves 21, and the extension width of one side is slightly larger than the thickness of a single arm of the elastic arms 11, and the length of the I-shaped vertical picture is slightly larger than the length of the elastic arms 11.

[0047] Three terminal cavities 23 are arranged above the upper connector 2, and the outer part is a branch line end cap slot 27 for inserting the branch line end cap 4.

[0048] The terminal cavity 23 is used to place the copper terminal 5, and the upper part is provided with a pointed screw upper via hole 24 and a flat end screw via hole 26, and the lower part is provided with a pointed screw lower via hole 25.

[0049] A main line threaded hole 51 is arranged above the copper terminal 5, which penetrates the copper terminal 5 as a whole, and a branch line threaded hole 52 and a branch line hole 53 perpendicular to and communicating with the branch line threaded hole 52 are arranged.

[0050] The branch line end cap 4 is provided with three branch line via holes 41.

[0051] When the three copper terminals 5 are respectively placed in the three terminal cavities 23 of the upper connector 2, the branch line end cap 4 is inserted into the branch line end cap slot 27 of the upper connector 2, at this time, the pointed screw upper via hole 24 and the pointed screw lower via hole 25 on the terminal cavity 23 and the main line threaded hole 51 on the copper terminal 5 have the same vertical axis, which will be aligned with and perpendicular to the axis of the main line groove 13 on the lower connector 1 below after the upper connector 2 is clamped with the lower connector 1, and also aligned with and perpendicular to the axis of the main line wire 8 placed in the main line groove 13; the flat end screw via hole 26 on the terminal cavity 23 and the branch line threaded hole 52 on the copper terminal 5 have the same vertical axis; the three branch line via holes 41 on the branch line end cap 4 have the same horizontal axis as the three branch line holes 53 on the three copper terminals 5; in this way, the three pointed screws 6 are respectively screwed into the main line threaded hole 51 on the copper terminal 5 through the pointed screw upper via hole 24 on the three terminal cavities 23, and continue to be screwed into the pointed screw lower via hole 25; the three flat end screws 7 are respectively screwed into the branch line threaded hole 52 on the copper terminal 5 through the flat end screw via hole 26 on the three terminal cavities 23.

[0052] Figure 7and Figure 8 Reflects the process state of the upper connector 2 inserted into the lower connector 1, Figure 9 and Figure 10 Reflects the state of the upper connector 2 inserted into the lower connector 1.

[0053] When the upper connector 2 is inserted into the lower connector 1, the insertion guide groove 21 is inserted along the elastic arms 11 of the lower connector 1, and when the lower end of the clamping wedge 12 of the lower connector 1 reaches the upper end surface of the elastic arms 11, it is blocked by the elastic arms 11, at this time, the clamping wedge 22 is pressed down, the elastic arms 11 are pushed open to both sides, and the clamping wedge 22 of the upper connector 2 is inserted into the clamping groove 12 of the lower connector 1, and the elastic arms 11 lose the resistance of the clamping wedge 22 and return to the original state, and the clamping wedge 22 of the upper connector 2 is clamped, so that the upper connector 2 and the lower connector 1 are buckled into one, which can resist the upward and downward thrust generated by the sharp end screw 6 penetrating into the trunk wire 8, and provide physical support for the trunk connection.

[0054] If the upper connector 2 and the lower connector 1 are clamped, the elastic arms 11 of the lower connector 1 can be pushed away by the separation notch 28 on the upper connector 2 to remove the upper connector 2.

[0055] Figure 11 It shows the situation of the utility model of a wire branch connector after three trunk wires 8 and three branch wires 9 are installed, Figure 12 It shows the principle of electrical connection.

[0056] After the three trunk wires 8 are placed in the three trunk wire grooves 13 of the lower connector 1, the upper connector 2 is inserted into the lower connector 1, and after being buckled into one, the three sharp end screws 6 are screwed to the bottom, that is, when the screw cap clamps the copper terminal 5 to stop, the sharp end screw 6 penetrates the trunk wire insulation 82 and penetrates into the trunk wire conductor 81, at this time, the three trunk wire conductors 81 are respectively connected to the corresponding three copper terminals 5; the three branch wires 9 of the lamp wire are all stripped of the end insulation, and according to the properties of the three trunk wires 8, they are respectively passed through the three branch wire through holes 41 of the branch wire end cover 4 and enter the branch wire holes 53 on the corresponding copper terminals 5, and the three flat end screws 7 are respectively tightened, so that the three branch wire conductors 91 are respectively connected to the corresponding copper terminals 5; thus, the trunk wire conductor 81, the sharp end screw 6, the copper terminal 5, the flat end screw 7 and the branch wire conductor 91 are connected, realizing the electrical connection path, so that the three branch wires 9 of the lamp wire 9Z are respectively connected to the three trunk wires 8 of the same property.

[0057] Figures 13-19 Seven steps of installing the utility model by using the wire pipe junction box are described, which are completed by using the clamping and pressing wire branch connector for the junction box.

[0058] First step: install all the wire ducts 10 and junction boxes 11 of the entire distribution circuit according to the traditional method; Second step: pass the red, blue and yellow-green three main wires 8 through all the wire ducts 10 and junction boxes 11 from the beginning to the end; Third step: put the three main wires 8 into the three main wire slots 13 of the lower connecting body 1 respectively in the junction boxes 11; Fourth step: press the insertion guide slot 21 of the upper connecting body 2 along the elastic arms 11 of the lower connecting body 1 downward, and the elastic arms 11 will be pushed away, until the clamping wedge 22 of the upper connecting body 2 enters the clamping slot 12 of the lower connecting body 1, and the elastic arms 11 of the lower connecting body 1 will return to their original state, and you will hear a click sound, which means the upper connecting body 2 and the lower connecting body 1 are buckled together; Fifth step: use the hexagonal screwdriver 12 to screw the three pointed end screws 6 to the bottom and tighten them, which completes the communication between the main wires 8 and the copper terminals 5; Sixth step: strip the end insulation of the red, blue and yellow-green three wire cores of the lamp wire 9 as branch wires 9, pass them through the branch wire through holes 41 on the branch wire end cover 4 according to the color of the main wires 8, and insert them into the branch wire holes 53 of the corresponding copper terminals 5, then use the hexagonal screwdriver 12 to screw the three flat end screws 7 tightly, which completes the communication between the branch wires 9 and the copper terminals 5, and at this time, the wiring of one electric lamp is completed; Seventh step: repeat the first to sixth steps until the wiring of all electric lamps in each junction box 10 of the entire distribution circuit is completed.

Claims

1. A crimp-type wire branch connector for a junction box, comprising a lower connector and an upper connector, wherein the upper connector includes three copper terminals, three pointed screws, three flat-end screws, and a branch end cap, characterized in that: The lower connector is formed by embedding an elastic metal sheet during injection molding. It has a U-shaped appearance. Its left and right elastic arms can spring open to the sides under external force and return to their original shape when the external force disappears. Each of the elastic arms of the lower connector has a slot. The lower part of the lower connector is provided with three parallel trunking channels, and wire clamps are also provided at both ends of the trunking channels; The upper connector is injection molded, with insertion guide grooves on the left and right sides of its front and rear end faces, wedges on the left and right sides of the lower part of the upper end face in the longitudinal middle, and separation notches on the left and right sides of the upper end face in the longitudinal middle. Inside the upper connector, there are three parallel terminal cavities, and outside them is a branch end cap slot for inserting the branch end cap. The terminal cavity is used to insert copper terminals, and its upper part is provided with a through hole for a pointed screw and a through hole for a flat-end screw, and its lower part is provided with a through hole for a pointed screw. The copper terminal is provided with a main threaded hole that runs through the entire copper terminal, and a branch threaded hole and a branch hole that is perpendicular to and connected to it. The branch line end cap is provided with 3 branch line through holes; The upper connector can be inserted into the lower connector. The insertion guide groove guides the upper connector to be inserted along the elastic arms of the lower connector. When the lower part of the wedge of the lower connector reaches the upper end face of the elastic arms, it is blocked. At this time, force is pressed down, and the wedge causes the elastic arms to spring open to both sides. Continue to press down, and when the wedge of the upper connector enters the slot position on the lower connector, the elastic arms lose the obstruction of the wedge and spring back to their original shape. The wedge enters the slot, and the upper connector and the lower connector are locked together as one.

2. The clamp-on wire branch connector for a junction box according to claim 1, characterized in that: The elastic metal sheet is also U-shaped, with one slot on each side. The slots on the left and right sides are the same shape as those on the lower connector but smaller in size. To ensure the elastic metal sheet is accurately embedded during injection molding of the lower connector and to guarantee their relative position after insertion, an embedding positioning hole is provided at the bottom of the elastic metal sheet for installation in the mold during injection molding of the lower connector. To ensure tight integration, several insertion process holes are also provided on the elastic metal sheet. These insertion process holes will be filled and leveled by the injection molding material during injection molding of the lower connector.

3. The clamp-on wire branch connector for a junction box according to claim 1, characterized in that: The upper connector is in the shape of a horizontally placed I-beam. The width of the vertical stroke of the I-beam is smaller than the inner width of the elastic double arms of the lower connector. There is a wedge on each side of the middle of the vertical stroke of the I-beam. The thickness of the wedge is equal to the thickness of a single arm of the elastic double arms. The height and length of the wedge are smaller than the height and width of the slot on the lower connector, so that the wedge can be easily accommodated by the slot. The two horizontal strokes at the front and back of the I-beam and the vertical strokes extending to the left and right form the insertion guide groove. The width of the extension on one side is greater than the thickness of a single arm of the elastic double arms, and the length of the vertical stroke of the I-beam is greater than the length of the elastic double arms.

4. The clamp-on wire branch connector for a junction box according to claim 1, characterized in that: After the three copper terminals are respectively inserted into the three terminal cavities of the upper connector, the branch end cap is inserted into the branch end cap slot of the upper connector. At this time, the through holes of the pointed screws and the through holes of the pointed screws on each terminal cavity are aligned with the vertical axis of the main thread hole on the copper terminal. After the upper connector and the lower connector are fastened together, this axis will be aligned with and perpendicular to the axis of the main thread groove of the lower connector below them, and also aligned with and perpendicular to the axis of the main thread wire inserted in the main thread groove. The through holes of the flat screws on the terminal cavity are aligned with the vertical axis of the branch thread hole on the copper terminal. The three branch through holes on the branch end cap are aligned with the horizontal axis of the branch holes on the three copper terminals. In this way, the three pointed screws can be screwed into the main thread hole on the copper terminal through the through holes of the pointed screws on the three terminal cavities, and then screwed into the through holes of the pointed screws. The three flat screws can be screwed into the branch thread hole on the copper terminal through the through holes of the flat screws on the three terminal cavities.

5. The clamp-on wire branch connector for a junction box according to claim 1, characterized in that: After the upper and lower connectors are engaged, to open them, the elastic arms can be pushed open using the separation notch on the upper connector, and the upper connector can be removed.

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