Easily-threaded prefabricated junction box

Abstract

The invention discloses an easy-threading type prefabricated junction box, and relates to the technical field of junction boxes, the easy-threading type prefabricated junction box comprises a box body, a box cover and a threading hole, and further comprises a portable hole sealing mechanism, the portable hole sealing mechanism comprises a plugging piece, a transverse section of the plugging piece is inserted into the inner side of the threading hole in a sliding mode, and a digging groove is formed in the end face of a vertical section of the plugging piece; an unlocking piece matched with the movable clamping piece is arranged in the digging groove, a movement cavity located between the movable notch and the digging groove is further formed in the inner wall of the plugging piece, and a limiting piece is arranged in the movement cavity; through the arrangement of the plugging piece, the movable clamping piece and the unlocking piece, compared with the mode that a metal sealing piece is connected to a welding seam at the opening of the threading hole in the prior art, the manual sealing and unsealing efficiency of the threading hole is effectively improved on the premise that the sealing performance of the threading hole in the box body is not affected, and the sealing efficiency of the threading hole is greatly improved. And the plugging piece is plugged and disassembled in the threading hole, so that manual knocking separation is not needed, damage to the box body is reduced to a certain extent, and the service life of the box body is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of junction boxes, and in particular to an easy-to-thread prefabricated junction box. Background Art

[0002] The box body of the prior art electrical junction box is mostly prefabricated, so that when the junction box is on site, it can be used by simply installing a box cover on the box body, avoiding the cumbersome on-site assembly of conventional junction boxes;

[0003] The traditional junction box is usually stamped with threading holes, which is convenient for manually inserting cables into the junction box for wiring. However, the threading holes on the home decoration junction box are usually set in multiple groups. In actual decoration work, only a few threading holes need to be threaded with cables, while the rest of the threading holes are exposed. As a result, when the junction box is buried in the wall later, concrete mud and sand will seep into the remaining threading holes, affecting the use of the cables.

[0004] In order to avoid this situation, the box body of the existing prefabricated junction box is connected to the opening of the wire threading hole of the box body by welding during the production process. The metal sealing piece can be knocked off. When in use, it is only necessary to knock off the metal sealing piece on the specified wire threading hole according to the construction requirements, and the other wire threading holes are covered by the metal sealing piece, which does not affect the sealing inside the junction box.

[0005] However, the welding design of the metal cover requires knocking on the metal cover to separate it from the box body when the cables are passed through. This operation is not only time-consuming and laborious, but the junction box body is generally made of simple and thin metal sheets, which are very easy to deform under knocking, causing damage to the appearance of the junction box and affecting its use. Summary of the invention

[0006] In order to solve the above technical problems, a prefabricated junction box that is easy to thread is provided, which solves the problem that the prior art uses a metal sealing plate to weld and seal the wire threading holes of the prefabricated junction box, resulting in the need to knock the metal sealing plate to separate it from the box body when the cable is passed through. The operation is not only time-consuming and labor-intensive, but the junction box body is generally made of simple and thin metal sheets, which are very easy to deform under knocking, causing damage to the appearance of the junction box and affecting its use.

[0007] To achieve the above purpose, the technical solution adopted by the present invention is: an easy-threading prefabricated junction box, comprising a box body with an open top, a box cover detachably mounted on the open end of the box body by screws, and a plurality of threading holes equidistantly opened on the side wall of the box body, and also comprising a portable sealing mechanism for sealing the threading holes;

[0008] The portable sealing mechanism includes a T-shaped sealing member, the transverse section of the sealing member is slidably inserted into the inner side of the threading hole, the vertical section of the sealing member contacts the outer wall of the box body, a movable notch is provided on the end face of the transverse section of the sealing member, a movable clamp is built into the movable notch, a pick-out groove is provided on the end face of the vertical section of the sealing member, an unlocking member cooperating with the movable clamp is provided in the pick-out groove, a moving cavity located between the movable notch and the pick-out groove is also provided in the inner wall of the sealing member, and a limiting member is built into the moving cavity.

[0009] Preferably, the movable card component includes two locking blocks in the shape of a right-angled trapezoid and symmetrically slidably arranged on the inner side of the movable notch, the ends of the two locking blocks that are away from each other are both inclined and pass through the blocking member, the locking blocks are in contact with the inner wall of the box body, a limiting track block is fixed to one side wall of the locking block, a limiting track groove that cooperates with the limiting track block is opened on the innermost inner wall of the movable notch, and a reset spring is fixed between the limiting track block and the inner wall of one side of the limiting track groove.

[0010] Preferably, the unlocking member comprises a pull ring arranged in the picking groove, and a pull rope is fixedly connected between the pull ring and the other end of the locking block.

[0011] Preferably, the limiting member includes a moving bar slidably arranged in the moving cavity, a locking column is vertically fixed on one surface of the moving bar, a positioning hole adapted to the locking column is provided on the track limiting block, an insertion hole connected to the moving cavity is provided on the inner side wall of the track limiting groove, and the end of the locking column extends into the insertion hole.

[0012] Preferably, the pull rope is L-shaped, and a guide roller is provided at the turning point of the pull rope, and the central axis of the guide roller is rotatably connected to the inner wall of the movable notch.

[0013] Preferably, a movement slot communicating with the movement cavity is formed on the outer wall of the blocking member, and a control block fixedly connected to the end of the movement cavity is slidably arranged in the movement slot.

[0014] Preferably, an airbag that fits the outer wall of the box body is fixedly embedded on one surface of the vertical section of the sealing piece, a magnetic block is fixedly embedded on the side surface of the locking block located at one end of the outer side of the sealing piece, and a magnetic strip corresponding to the magnetic block is fixedly embedded on the inner wall of the box body.

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] (1) By setting the sealing part, the movable card part and the unlocking part, under the premise of not affecting the sealing of the threading hole on the box body, compared with the existing technology of welding the metal sealing piece at the opening of the threading hole, the efficiency of manual sealing and unsealing of the threading hole is greatly improved. In addition, the sealing part can be plugged in and out of the threading hole, and there is no need for manual knocking to disengage it, which reduces the damage to the box body to a certain extent and ensures the service life of the box body.

[0017] (2) Through the setting of the limiting member, as shown above, the pull ring in the unlocking member is pulled outward from the extraction groove, so that the locking card block is forced to shrink to the inner side of the movable notch. After the blocking member is pulled out from the threading hole, the control block is pushed on the inner side of the moving gap, so that the moving bar carrying the locking column is inserted into the positioning hole on the track limiting block through the insertion hole. In this way, the track limiting block and the locking card block can be effectively locked as a whole, offsetting the elastic force of the return spring, so that the locking card block can stably shrink to the inner side of the movable notch when the blocking member is idle, and be hidden and protected by the active notch, so as to avoid the locking card block protruding too much on the blocking member, which is easy to be damaged by collision with foreign objects when idle, affecting the secondary use effect, and enhancing the protection of the locking card block.

[0018] (3) By setting the magnetic block, magnetic strip and air bag, when the plugging piece is inserted into the inner side of the threading hole and the locking block pops out from the inner side of the movable notch to position the plugging piece, the magnetic block on the locking block can correspond to the magnetic strip on the inner wall of the box body, and then the two repel each other, forming a thrust on the plugging piece and the locking block as a whole, and acting on the air bag to fit tightly against the outer wall of the box body, thereby improving the sealing effect of the threading hole of the box body and preventing cement mortar from penetrating into the inner side of the box body through the threading hole when the box body is buried in the wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the partial internal structure of the present invention;

[0021] Figure 3 For the present invention Figure 2 Schematic diagram of the structure at A in the middle;

[0022] Figure 4 It is a schematic diagram of the internal structure of the plugging member of the present invention.

[0023] The numbers in the figure are:

[0024] 1. Box body; 2. Box cover; 3. Sealing piece; 4. Movable notch; 5. Locking block; 6. Track limiting groove; 7. Track limiting block; 8. Reset spring; 9. Pull ring; 10. Pull rope; 11. Guide roller; 12. Moving cavity; 13. Moving strip; 14. Locking column; 15. Moving seam; 16. Control block; 17. Airbag; 18. Magnetic block; 19. Magnetic strip. DETAILED DESCRIPTION

[0025] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0026] Reference Figure 1-4 As shown, a prefabricated junction box for easy threading includes a box body 1 with an open top, a box cover 2 detachably mounted on the open end of the box body 1 by screws, and a plurality of threading holes equidistantly opened on the side wall of the box body 1, and also includes a lightweight sealing mechanism for sealing the threading holes;

[0027] The portable sealing mechanism comprises a T-shaped plugging member 3, the transverse section of the plugging member 3 is slidably inserted into the inner side of the threading hole, the vertical section of the plugging member 3 contacts the outer wall of the box body 1, a movable notch 4 is provided on the end surface of the transverse section of the plugging member 3, a movable clamp is built in the movable notch 4, a pick-out groove is provided on the end surface of the vertical section of the plugging member 3, and an unlocking member matching with the movable clamp is arranged in the pick-out groove;

[0028] The movable card member includes two locking blocks 5 in a right-angled trapezoidal shape and symmetrically slidably arranged on the inner side of the movable notch 4. The ends of the two locking blocks 5 that are away from each other are both inclined and pass through the blocking member 3. The locking blocks 5 are in contact with the inner side wall of the box body 1. A limiting track block 7 is fixed to one side wall of the locking block 5. A limiting track groove 6 that matches the limiting track block 7 is opened on the inner wall of the innermost side of the movable notch 4. A reset spring 8 is fixed between the limiting track block 7 and the inner wall of one side of the limiting track groove 6.

[0029] The unlocking member includes a pull ring 9 disposed in the picking groove, and a pull rope 10 is fixedly connected between the pull ring 9 and the other end of the locking block 5;

[0030] By setting the blocking member 3, the movable clamping member and the unlocking member, when it is necessary to pass the cable from the threading hole to the inside of the box body 1, it is only necessary to pull out the pull ring 9 in the unlocking member from the extraction groove, and the two locking blocks 5 in the movable clamping member will be forced to shrink to the inside of the movable notch 4 at the same time, so that they are separated from the inner wall of the box body 1, that is, the fixing effect of the blocking member 3 on the threading hole is quickly released, and then the blocking member 3 is simply pulled out to disengage from the threading hole, that is, the sealing of the threading hole is released;

[0031] When the plugging member 3 is inserted into the threading hole, the beveled edge of the locking card block 5 can contact the inner wall of the threading hole opening during the plugging member 3 is inserted, and then the two groups of locking card blocks 5 are automatically squeezed and contracted to the inner side of the movable notch 4, and the limiting rail block 7 slides on the inner side of the limiting rail groove 6 to compress the reset spring 8 to deform, so as to avoid obstruction to the insertion of the plugging member 3. When the plugging member 3 is inserted, the locking card block 5 is inserted into the box body 1 and is no longer squeezed. Then, the limiting rail block 7 acts on the locking card block 5 under the elastic force of the reset spring 8 to quickly reset the plugging member 3 out of the box body 1 and contact the inner wall of the box body 1, which has a limiting effect on the plugging member 3, so that the plugging member 3 can be firmly fixed in the threading hole;

[0032] By setting the sealing member 3, the movable card member and the unlocking member, under the premise of not affecting the sealing of the threading hole on the box body 1, compared with the prior art method of welding the metal sealing piece at the opening of the threading hole, the manual sealing and unsealing efficiency of the threading hole is extremely effectively improved, and the sealing member 3 is plugged in and disassembled in the threading hole, and there is no need for manual knocking to disengage, which reduces the damage to the box body 1 to a certain extent and ensures the service life of the box body 1.

[0033] Further, refer to Figure 4 As shown, it is worth noting that the pull rope 10 is L-shaped, and a guide roller 11 is provided at the turning point of the pull rope 10, and the central axis of the guide roller 11 is rotatably connected to the inner wall of the movable notch 4;

[0034] By setting the guide roller 11, the pull rope 10 can be effectively guided to be connected with the locking blocks 5 and the pull rings 9 at different positions in an L shape, so that the pull rope 10 is horizontally retracted in the inner wall of the blocking member 3 to reduce its wear.

[0035] Further, refer to Figure 4 As shown, it is worth noting that a movement cavity 12 located between the movable notch 4 and the picking groove is also provided in the inner wall of the blocking member 3, and a limiting member is built in the movement cavity 12;

[0036] The limiting member includes a moving bar 13 slidably disposed in the moving cavity 12, a locking column 14 is vertically fixed on one surface of the moving bar 13, a positioning hole adapted to the locking column 14 is provided on the track limiting block 7, an insertion hole connected to the moving cavity 12 is provided on the inner side wall of the track limiting groove 6, the end of the locking column 14 extends into the insertion hole, and the pull rope 10 is retracted inside the moving cavity 12 and passes through the moving bar 13;

[0037] A movement slot 15 communicating with the movement cavity 12 is formed on the outer wall of the blocking member 3, and a control block 16 fixedly connected to the end of the movement cavity 12 is slidably disposed in the movement slot 15;

[0038] Through the setting of the limiting piece, as shown above, the pull ring 9 in the unlocking piece is pulled outward from the extraction groove, so that the locking block 5 is forced to shrink the inner side of the movable notch 4. After the blocking piece 3 is pulled out from the threading hole, the control block 16 is pushed on the inner side of the moving gap 15, so that the moving bar 13 carrying the locking column 14 is inserted into the positioning hole on the track limiting block 7 through the insertion hole. In this way, the track limiting block 7 and the locking block 5 can be effectively locked as a whole, offsetting the elastic force of the reset spring 8, so that the locking block 5 can stably shrink the inner side of the movable notch 4 when the blocking piece 3 is idle, and be hidden and protected by the active notch 4, avoiding the locking block 5 from protruding too much on the blocking piece 3, and being easily damaged by collision with foreign objects when idle, affecting the secondary use effect.

[0039] Further, refer to Figure 3 and Figure 4 As shown, it is worth noting that an air bag 17 that fits the outer wall of the box body 1 is fixedly embedded on one surface of the vertical section of the blocking member 3, a magnetic block 18 is fixedly embedded on the side surface of the locking block 5 located at one end of the outer side of the blocking member 3, and a magnetic strip 19 corresponding to the magnetic block 18 is fixedly embedded on the inner wall of the box body 1;

[0040] Through the arrangement of the magnetic block 18, the magnetic strip 19 and the airbag 17, when the blocking piece 3 is inserted into the inner side of the threading hole and the locking block 5 pops out from the inner side of the movable notch 4 to position the blocking piece 3, the magnetic block 18 on the locking block 5 can correspond to the magnetic strip 19 on the inner wall of the box body 1, and then the two repel each other, forming a thrust on the blocking piece 3 and the locking block 5 as a whole, acting the airbag 17 to fit tightly against the outer wall of the box body 1, thereby improving the sealing effect of the threading hole of the box body 1 and preventing cement mortar from penetrating into the inner side of the box body 1 through the threading hole when the box body 1 is buried in the wall.

[0041] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A prefabricated junction box for easy threading, comprising a box body (1) with an open top, a box cover (2) detachably mounted on the open end of the box body (1) by screws, and a plurality of threading holes equidistantly opened on the side wall of the box body (1), characterized in that: Also included is a portable sealing mechanism for sealing the threading hole; The portable sealing mechanism comprises a T-shaped sealing member (3), wherein the transverse section of the sealing member (3) is slidably inserted into the inner side of the threading hole, and the vertical section of the sealing member (3) contacts the outer wall of the box body (1). A movable notch (4) is provided on the end surface of the transverse section of the sealing member (3), and a movable clamp is built in the movable notch (4). A pick-out groove is provided on the end surface of the vertical section of the sealing member (3), and an unlocking member cooperating with the movable clamp is provided in the pick-out groove. A moving cavity (12) located between the moving notch (4) and the pick-out groove is also provided in the inner wall of the sealing member (3), and a limiting member is built in the moving cavity (12).

2. The easy-threading prefabricated junction box according to claim 1, characterized in that: The movable clamping member comprises two locking clamping blocks (5) in a right-angle trapezoidal shape and symmetrically slidably arranged inside the movable notch (4); the ends of the two locking clamping blocks (5) that are away from each other are both inclined surfaces and pass through the blocking member (3); the locking clamping blocks (5) are in contact with the inner side wall of the box body (1); a limiting track block (7) is fixed to one side wall of the locking clamping block (5); a limiting track groove (6) that matches the limiting track block (7) is formed on the innermost inner wall of the movable notch (4); and a return spring (8) is fixed between the limiting track block (7) and the inner wall of one side of the limiting track groove (6).

3. The easy-threading prefabricated junction box according to claim 2, characterized in that: The unlocking member comprises a pull ring (9) arranged in the picking groove, and a pull rope (10) is fixedly connected between the pull ring (9) and the other end of the locking block (5).

4. The easy-threading prefabricated junction box according to claim 2, characterized in that: The limiting member comprises a moving bar (13) slidably arranged in the moving cavity (12); a locking column (14) is vertically fixed on one surface of the moving bar (13); a positioning hole matched with the locking column (14) is provided on the track limiting block (7); an insertion hole connected with the moving cavity (12) is provided on the inner side wall of the track limiting groove (6); and a distal end of the locking column (14) extends into the insertion hole.

5. The easy-threading prefabricated junction box according to claim 3, characterized in that: The pull rope (10) is L-shaped, and a guide roller (11) is provided at the turning point of the pull rope (10), and the central axis of the guide roller (11) is rotatably connected to the inner wall of the movable notch (4).

6. The easy-threading prefabricated junction box according to claim 4, characterized in that: A movement slot (15) communicating with the movement chamber (12) is provided on the outer wall of the blocking member (3), and a control block (16) fixedly connected to the end of the movement chamber (12) is slidably arranged in the movement slot (15).

7. The easy-threading prefabricated junction box according to claim 2, characterized in that: An air bag (17) that fits the outer wall of the box body (1) is fixedly embedded on one surface of the vertical section of the blocking piece (3); a magnetic block (18) is fixedly embedded on the side surface of the locking block (5) at one end outside the blocking piece (3); and a magnetic strip (19) corresponding to the magnetic block (18) is fixedly embedded on the inner wall of the box body (1).

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