CN207868139U - The plug-in type miniature circuit breaker of lifting switch module and pedestal linking intensity - Google Patents

Abstract

The utility model discloses a plug-in small circuit breaker for improving the connection strength of a switch module and a base, which comprises a base and a plug-in switch module; the plug-in switch module includes an insulating shell, an incoming power board and an electric power outlet board; The base is provided with two power sockets and two slide rail components, and the two power sockets are respectively fixed on a corresponding slide rail component; In the process of pulling out, insert or pull out the electric connection slot of the corresponding electric socket respectively; the outer wall of the plastic shell of the electric socket is provided with an anti-detachment slot; the insulating shell of the plug-in switch module is provided with and anti- The anti-detachment panel whose shape is adapted to the detachment slot, when the plug-in switch module is inserted into the base, the detachment-prevention panel is embedded in the anti-detachment slot. The technical effect of the utility model is to lock the base and the plug-in switch module along the two sides of the switch module to prevent the two from being loose and separated.

Description

Plug-in miniature circuit breaker with enhanced connection strength between switch module and base

technical field

The utility model belongs to the technical field of electric power circuit breakers, in particular to a small circuit breaker which improves the connection strength of a switch module and a base.

Background technique

Patent document CN101853750A discloses a small circuit breaker for side plug-in installation, which is composed of two small single-pole circuit breakers assembled and connected side by side and a terminal base. A groove is provided in the front side of the terminal base, and the two A small single-pole circuit breaker is inserted into the groove, and the upper side and the lower side of the small single-pole circuit breaker are respectively provided with conductive lugs, and the upper side and the lower side of the wiring base are respectively provided with wiring ports, and the wiring ports are respectively provided. A wiring frame and a wiring board are provided, and the wiring frame is in contact with the conductive lug. When the application circuit breaks down and the miniature circuit breaker needs to be replaced, the miniature single-pole circuit breaker can be directly pulled out from the wiring base without disconnecting the power line, and then reinserted into the wiring base after repair or replacement. This kind of miniature circuit breaker has the following disadvantages: when the miniature single-pole circuit breaker is inserted into the wiring base, the miniature single-pole circuit breaker has an expansion force on the base parts on both sides, especially in an environment with vibration, it is easy to loosen. detached or displaced.

Utility model content

The purpose of the utility model is to provide a plug-in miniature circuit breaker which improves the connection strength between the switch module and the base.

The technical solution for realizing the purpose of this utility model is: a plug-in miniature circuit breaker, including a base and a plug-in switch module; Two power connection bases and two slide rail assemblies, the two power connection bases are respectively fixed on a corresponding slide rail assembly; the power inlet board and the power outlet board are in the process of plugging and unplugging with the plug-in switch module , respectively insert or pull out the electric connection slot of a corresponding electric socket; the outer wall of the plastic housing of the electric socket is provided with an anti-detachment slot; the insulating shell of the plug-in switch module is provided with an anti-detachment slot The shape-adapted anti-off panel, when the plug-in switch module is inserted into the base, the anti-off panel is embedded in the anti-off slot.

In the above scheme, the shapes of the anti-detachment panel and the anti-detachment embedding groove are both T-shaped.

The utility model has the following advantages: when the plug-in switch module is inserted into the base, the anti-detachment panel is embedded in the anti-detachment slot, and its technical effect is to lock the base and the plug-in switch module along the two sides of the switch module , to prevent the two from loosening and separating.

Description of drawings

Fig. 1 is a kind of three-dimensional structure schematic diagram of the utility model;

Fig. 2 is a schematic diagram of an internal structure of the circuit breaker shown in Fig. 1 viewed from a front view;

Fig. 3 is an exploded view of the circuit breaker shown in Fig. 2;

Fig. 4 is a schematic diagram of a three-dimensional structure of the circuit breaker shown in Fig. 1 when the power supply board and the terminal assembly are connected;

Fig. 5 is an exploded view of the electric plug board and terminal assembly shown in Fig. 4;

Fig. 6 is an exploded view of the electric plug board and terminal assembly shown in Fig. 4 when viewed from another angle;

FIG. 7 is an exploded view of the terminal assembly in the circuit breaker shown in FIG. 1 after the retaining spring is removed.

The marks shown in the drawings are: base 1, power socket 11, chute 111, plastic shell 112, anti-detachment groove 1121, slide rail assembly 12, fixing piece 121, fixed base plate 1211, support plate 1212, slide plate Part 1213, notch 1214, top plate 122, top pressure screw 123, plug-in switch module 2, insulating case 21, anti-detachment panel 211, power-in board 22, welding part 221, power-out board 23, terminal assembly 3. Metal frame 31, metal frame top 311, screw hole 312, metal frame bottom wall 313, crimping bolt 32, fastening head 321, screw rod 322, conductive terminal 33, crimping plate part 331, guide part 3311 , power connection plate part 332, power connection clip 3321, power connection slot 3322, bearing boss 3323, reinforcement plate part 3324, metal clip spring 34, sleeve hole 341, opening and closing operating mechanism 4, static contact 41 , moving contact 42, moving contact lever 421, connecting rod 422, moving contact 423, jumper 43, opening and closing handle 44, lock 45, torsion spring 46, overcurrent delay release mechanism 47, bimetal Sheet 471, adjusting screw 472, short circuit instantaneous release mechanism 48, coil assembly 481, arc extinguishing chamber 49.

Detailed ways

(Example 1)

This embodiment is a small circuit breaker that enhances the connection strength between the switch module and the base, as shown in Figures 1 to 7, including a base 1 and a plug-in switch module 2; the base is provided with two power sockets 11 and two The slide rail assembly 12, the two power sockets are respectively fixed on a corresponding slide rail assembly; the two slide rail assemblies are arranged in parallel, and each slide rail assembly includes a fixing piece 121, a top plate 122 and a top pressure screw 123; the fixing piece includes a fixing piece The base plate part 1211, the support plate part 1212 extending vertically upward from both ends of the fixed base plate part, and the slide plate part 1213 formed by bending and extending from the top end of each support plate part towards the direction close to the other support plate part, in each slide rail assembly There is a gap 1214 between the two slide parts; each power socket is provided with a chute 111 adapted to the slide part on both sides, and each slide part extends into a corresponding chute; the fixed base part is provided with a mounting hole (not shown in the figure), the fixed base part fixes itself in the required position through the mounting hole and the external mounting screws; the top plate is located between the two support plate parts of the slide rail assembly, and is located Between the bottom walls of the electric seat, the top plate is provided with screw holes adapted to the top pressure screw; when the top pressure screw rotates along the preset direction, the bottom wall of the top pressure screw presses against the fixed base plate, because the top plate is pressed by the two The position limit of the support plate cannot be rotated, and the top plate moves away from the fixed base plate until it is pressed against the bottom wall of the electric socket; under the clamping action of the top plate and the sliding plate, the electric socket is fixed on the corresponding slide rail On the component; loosen the top pressure screw, and the power socket can move along the slide.

The pluggable switch module includes an insulating shell 21, an incoming power board 22, an outgoing power board 23, and an opening and closing operating mechanism 4 for switching the circuit between the incoming power board and the outgoing power board. The inner ends of the power-in board and the power-out board are fixedly arranged inside the insulating shell, and the outer ends of the power-in board and the power-out board protrude from the insulating shell and are located on the two side walls of the insulating shell; In this embodiment, the power inlet board and the power outlet board are perpendicular to the plugging direction of the plug-in switch module. side walls.

The transverse direction of the insulating shell mentioned herein refers to the direction from one electrical socket to another electrical socket.

The opening and closing operating mechanism includes a static contact 41, a static contact 411, a moving contact 42, a moving contact lever 421, a connecting rod 422, a moving contact 423, a jumper 43, an opening and closing handle 44, a lock 45, Torsion spring 46, overcurrent time-delay release mechanism 47, short-circuit instantaneous release mechanism 48, and arc extinguishing chamber 49; the static contact is electrically connected to the power-in board 22, and the arc extinguishing chamber is arranged below the short-circuit instantaneous tripping mechanism to prevent short-circuit The instantaneous tripping mechanism includes a coil assembly 481; the coil assembly includes a coil and an opening and tripping rod located in the center hole of the coil; the arc extinguishing chamber is located directly below the coil assembly; the overcurrent delay tripping mechanism includes a bimetal 471 and an adjusting screw 472, the adjustment screw is located above the electric socket, so that it is easy to adjust; the power supply board and the static contact are electrically connected in sequence, and the moving contact, the coil, the bimetal and the power outlet board are electrically connected in sequence; in this embodiment, The static contact 41 also serves as an arc striker.

In this embodiment, both the power inlet board 22 and the power outlet board 23 are integrally made of copper plates; The welding tail plate part 221 on the conductor, the tail end of the double-layer power-connecting board part is bent and extended vertically toward the direction away from each other to form the welding tail board part; the power-in board with this structure has better conductivity and control Temperature rise performance, at the same time, due to the two welding tail plates, the welding area is effectively increased, thereby improving the welding performance.

Each electric socket includes a plastic housing 112 and a terminal assembly 3 arranged in the plastic housing; the terminal assembly includes a metal frame 31, crimping bolts 32, conductive terminals 33 and metal retaining springs 34; the metal frame is made of steel plate In a rectangular shape, the top 311 of the metal frame is provided with a screw hole 312; the crimping bolt includes a fastening head 321 and a screw rod 322, and the screw rod is adapted to the screw hole on the metal frame; the conductive terminal includes a crimping plate part 331 and a power plate Part 332; the conductive terminal is embedded and fixed on the inner wall of the plastic housing of the electric socket, and the metal frame is movably arranged in the plastic housing; the crimping plate part of the conductive terminal passes through the metal frame, and is connected to the bottom of the metal frame Wall 313 is arranged in parallel; the bottom wall of the clamping plate part and the metal frame is clamped to form a cable clamp hole; the bottom end of the screw rod of the clamping bolt is crimped on the clamping plate part; when the clamping bolt is on the screw of the metal frame When reciprocating rotation in the hole, since the bottom end of the crimping bolt screw is crimped on the crimping plate, and the metal frame cannot rotate under the restriction of the plastic shell, the metal frame will reciprocate along the direction of the screw rod , so that the wires located in the cable clamp holes are clamped by the crimping part and the bottom wall of the metal frame, so as to realize the electrical connection between the conductive terminal and the external power supply.

The connecting plate part of the conductive terminal is perpendicular to the crimping plate part, and the conductive terminal is made of copper plate in one piece; there are two connecting clips 3321 with gaps on the connecting plate, and the two connecting clips are clamped to form Electric connection slot 3322; each electric connection clip is provided with a load-bearing boss 3323 made by stamping process; the metal clip spring is made of steel, and the shape of the metal clip spring is an arc shape larger than a semicircle, and the metal clip spring Both ends of each are provided with a sleeve hole 341, and each load-bearing boss is inserted into a corresponding sleeve hole. In practice, the distance between the two load-bearing bosses is preferably greater than the distance between the two sleeve holes, generally greater than 0.05 to 0.3 millimeters; in this way, when assembling, the metal retaining ring needs to be slightly stretched to make the two sleeves The hole sleeves are set on the two load-bearing bosses, thereby forming an internal stress, which can be used to achieve a better clamping effect. A reinforcing plate portion 3324 is respectively provided on both sides of the two connecting clips on the connecting plate portion, and there is a gap between each reinforcing plate portion and an adjacent clamping plate portion, so as not to hinder the elastic deformation of the clamping plate portion . The reinforcing board part is used to increase the connection strength between the connecting board part and the crimping board part, and at the same time, if necessary, the two reinforcing board parts can also be embedded and fixed in the plastic shell 112 .

During the process of plugging and unplugging the plug-in switch module, the power-in board and the power-out board are respectively inserted into or pulled out of the power slot of a corresponding power socket, so as to realize the connection between the plug-in switch module and the two power sockets. Electrical connection between sockets.

In this embodiment, the outer end of the clamping plate portion 331 protrudes from the metal frame, and is curled upwards in an arc shape as a guide portion 3311 , so that the external wires can be inserted into the cable clamp hole more easily.

The use of this structure has the following advantages: because the conductive terminal needs to be made of copper with excellent electrical conductivity, but the strength of the copper is poor, and it is easy to deform so that the electrical contact performance of the electrical socket is poor; The clamping spring provides clamping force for the copper material, which effectively overcomes the above-mentioned technical disadvantages, and its structure is relatively simplified to ensure a long service life.

In this embodiment, the outer wall of the plastic housing 112 of the electric socket 11 is provided with an anti-disengagement groove 1121, and the shape of the anti-disengagement groove is T-shaped; Detachment plate 211, the shape of the anti-detachment panel is T-shaped adapted to the anti-detachment slot; when the plug-in switch module is inserted into the preset position of the base, the anti-detachment panel is embedded in the anti-detachment slot Middle; the plugging direction of the plug-in switch module is the longitudinal direction of the plug-in switch module, and the anti-detachment panel extends along the transverse direction of the plug-in switch module, that is, the anti-detachment panel is perpendicular to the direction of the plug-in switch module. Plug-in direction, so as to fix the plug-in switch module and two power sockets in the transverse direction along the plug-in switch module.

Apparently, the above-mentioned embodiments of the present utility model are only examples for clearly illustrating the present utility model, rather than limiting the implementation manner of the present utility model. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And these obvious changes or changes derived from the essential spirit of the present utility model still belong to the protection scope of the present utility model.

Claims (2)

1. A pluggable miniature circuit breaker that enhances the connection strength of the switch module and the base, including the base and the pluggable switch module; the pluggable switch module includes an insulating shell, an incoming power board and an electric outlet board; it is characterized in that : The base is provided with two power sockets and two slide rail assemblies, and the two power sockets are respectively fixed on a corresponding slide rail assembly; In the process of plugging and unplugging, respectively insert or pull out the electric connection slot of a corresponding electric socket; the outer wall of the plastic shell of the electric socket is provided with an anti-detachment slot; the insulating shell of the plug-in switch module is provided with and The anti-detachment panel is adapted to the shape of the anti-detachment slot. When the plug-in switch module is inserted into the base, the anti-detachment panel is embedded in the anti-detachment slot. 2. The plug-in miniature circuit breaker for improving the connection strength between the switch module and the base according to claim 1, wherein the shape of the anti-detachment panel and the anti-detachment insertion groove are both T-shaped.