A low-voltage power switch device

Abstract

The present invention belongs to the technical field of low-voltage power switches, and specifically relates to a low-voltage power switch device, which includes an upper shell and a lower shell. The upper shell includes an upper inner shell and an upper outer shell, and the upper inner shell is installed inside the upper outer shell. The lower shell includes a lower inner shell and a lower outer shell, and the lower inner shell is installed inside the lower outer shell. The upper inner shell is connected to the lower inner shell, and the upper outer shell is connected to the lower outer shell. Control components are installed inside the upper inner shell and the lower inner shell. An electromagnetic isolation upper layer is installed between the upper inner shell and the upper outer shell, and an electromagnetic isolation lower layer is installed between the lower inner shell and the lower outer shell. The electromagnetic isolation upper layer and the electromagnetic isolation lower layer are symmetrically arranged, and successively include an asbestos fiber flame retardant layer, a conductive plastic layer, and a flexible wave-absorbing layer from the inside to the outside. The electromagnetic shielding effect of this device is good.

Description

Technical Field

[0001] The present invention belongs to the technical field of low-voltage power switches, and particularly relates to a low-voltage power switch device. Background Art

[0002] Low-voltage switches include automotive low-voltage protection switches, pressure control low-voltage switches, and low-voltage switches for power equipment, which are respectively applicable to the automotive industry, water purifier industry, and power industry fields. Low-voltage switches are responsible for controlling, protecting, measuring, converting, and distributing electrical energy in a low-voltage power supply system. However, low-voltage switches are easily interfered by the surrounding electromagnetic fields during use. Therefore, general low-voltage power switches are usually provided with electromagnetic isolation structures, which are generally arranged inside the housing of the low-voltage power switch. However, since the housing needs to be set as a detachable structure, generally including an upper housing and a lower housing, when the upper housing and the lower housing are connected, the electromagnetic isolation layer is likely to be in poor contact, resulting in poor electromagnetic shielding effect. Summary of the Invention

[0003] Aiming at the technical problems existing in the prior art, the purpose of the present invention is to provide a low-voltage power switch device with good electromagnetic shielding effect.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions: A low-voltage power switch device includes an upper housing and a lower housing. The upper housing includes an upper inner housing and an upper outer housing, and the upper inner housing is installed inside the upper outer housing. The lower housing includes a lower inner housing and a lower outer housing, and the lower inner housing is installed inside the lower outer housing. The upper inner housing is connected to the lower inner housing, and the upper outer housing is connected to the lower outer housing. Control components are installed inside the upper inner housing and the lower inner housing. An upper electromagnetic isolation layer is installed between the upper inner housing and the upper outer housing, and a lower electromagnetic isolation layer is installed between the lower inner housing and the lower outer housing. The upper electromagnetic isolation layer and the lower electromagnetic isolation layer are symmetrically arranged and sequentially include an asbestos fiber flame-retardant layer, a conductive plastic layer, and a flexible wave-absorbing layer from the inside to the outside.

[0005] Furthermore, the upper inner housing, the asbestos fiber flame-retardant layer, the conductive plastic layer, the flexible wave-absorbing layer, and the upper outer housing gradually become higher to form an upper stepped portion, and the lower inner housing, the asbestos fiber flame-retardant layer, the conductive plastic layer, the flexible wave-absorbing layer, and the lower outer housing gradually become lower to form a lower stepped portion. The upper stepped portion and the lower stepped portion are fitted and connected.

[0006] Furthermore, it further includes a locking structure. The locking structure includes a reinforcing bar, a claw, and an unlocking pressing plate. The reinforcing bar is installed on the upper outer housing, the claw is installed on the lower outer housing, a card slot matching with the claw is opened on the reinforcing bar, one end of the claw is placed inside the card slot, and the unlocking pressing plate is installed adjacent to the reinforcing bar on the upper outer housing.

[0007] Furthermore, the unlocking pressing plate includes a pressing plate main body, a pushing portion, and an unlocking portion. The pressing plate main body, the pushing portion, and the unlocking portion are integrally formed. The unlocking portion corresponds to the card slot, the pushing portion is arranged in the middle of the pressing plate main body, and a strip-shaped protrusion is arranged on the pushing portion.

[0008] Furthermore, the reinforcing strip includes a reinforcing strip body and a locking portion. The reinforcing strip body and the locking portion are integrally formed. The width of the locking portion is smaller than that of the reinforcing strip body. A clamping groove is formed between the locking portion and the adjacent reinforcing strip body. One end of the claw is located in the clamping groove, and the unlocking portion is provided with an inclined surface corresponding to the position of the claw.

[0009] Furthermore, the unlocking pressing plate is provided with a limiting groove, and a limiting post is installed on the side wall of the upper shell corresponding to the limiting groove.

[0010] Furthermore, an elastic structure is further included. The elastic structure includes an elastic plate, a connecting member, and an extrusion member. The elastic plate is located on the side wall of the lower inner shell. The connecting member is installed at both ends of the elastic plate. The connecting member includes a fixed block and a movable block. The fixed block is installed on the side wall of the lower inner shell. One side of the movable block is connected to both ends of the elastic plate, and the other side of the movable block is connected to the fixed block. An extrusion groove is provided between the movable block and the fixed block, and the extrusion block is installed on the side wall of the upper inner shell corresponding to the extrusion groove.

[0011] Furthermore, the connecting member further includes a guiding post. One end of the guiding post is installed on the fixed block, and the other end passes through the movable block.

[0012] Furthermore, the control element is provided with a toggle switch. The toggle switch includes a toggle plate. The toggle plate is connected to the control element. The upper shell is provided with a through toggle groove. A sliding baffle is installed in the toggle groove, and the toggle switch is installed in the switch groove of the sliding baffle.

[0013] Furthermore, the conductive plastic layer includes resin and conductive additives, and the flexible wave-absorbing layer includes an absorbing medium. The absorbing medium includes nanomaterials, planar hexagonal ferrites, amorphous magnetic fibers, and particulate films.

[0014] Generally speaking, the present invention has the following advantages: (1) An electromagnetic isolation layer including an asbestos fiber flame-retardant layer, a conductive plastic layer, and a flexible wave-absorbing layer is provided between the inner shell and the outer shell of the present invention, and the electromagnetic shielding effect is good.

[0015] (2) The inner shell, the asbestos fiber flame-retardant layer, the conductive plastic layer, the flexible wave-absorbing layer, and the outer shell are arranged in a stepped shape. The stepped fitting design of the upper shell and the lower shell further enhances the electromagnetic shielding effect.

[0016] (3) The reinforcing strip can strengthen the strength of the connection between the upper shell and the lower shell. With the setting of the locking mechanism, it can ensure that the connection will not deform and affect the electromagnetic shielding effect.

[0017] (4) The elastic plate of the elastic structure bends and abuts against the side wall of the lower inner shell, further strengthening the strength of the inner shell and preventing the lower shell from deforming. Description of the Drawings

[0018] Figure 1It is a structural schematic diagram of the present invention.

[0019] Figure 2 It is an exploded view of the present invention.

[0020] Figure 3 It is a structural schematic diagram of the upper shell of the present invention.

[0021] Figure 4 It is a schematic diagram of the structure inside the upper shell of the present invention.

[0022] Figure 5 It is a structural schematic diagram of the lower shell of the present invention.

[0023] Figure 6 yes Figure 5 A magnified view of the part in the middle circle.

[0024] Figure 7 It is an exploded view of the upper shell of the present invention.

[0025] Figure 8 It is a structural schematic diagram of the elastic structure of the present invention.

[0026] Figure 9 yes Figure 8 A magnified view of the part in the middle circle.

[0027] Among them: 1 is an upper shell, 1-1 is an upper inner shell, 1-2 is an upper outer shell, 2 is a lower shell, 2-1 is a lower inner shell, 2-2 is a lower outer shell, 3 is an electromagnetic isolation layer, 3-1 is an asbestos fiber flame retardant layer, 3-2 is a conductive plastic layer, 3-3 is a flexible absorbing layer, 4 is a control element, 4-1 is a toggle plate, 4-2 is a sliding baffle, 4-3 is a switch slot, 5 is a locking structure, 5-1 is a reinforcing strip, 5-2 is a claw, 5-3 is an unlocking pressure plate, 5-3-1 is a pressure plate body, 5-3-2 is a pushing part, 5-3-3 is an unlocking part, 5-3-4 is a limiting column, 5-4 is a slot, 6 is an elastic structure, 6-1 is an elastic plate, 6-2 is a connecting piece, 6-2-1 is a fixed block, 6-2-2 is a movable block, 6-2-3 is a guide column, and 6-3 is an extrusion piece. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0029] like Figure 1-2As shown in the figure, a low-voltage power switch device includes an upper shell and a lower shell. The upper shell includes an upper inner shell 1-1 and an upper outer shell 1-2. The upper inner shell 1-1 is installed inside the upper outer shell 1-2. The lower shell includes a lower inner shell 2-1 and a lower outer shell 2-2. The lower inner shell 2-1 is installed inside the lower outer shell 2-2. The upper inner shell 1-1 is connected to the lower inner shell 2-1, and the upper outer shell 1-2 is connected to the lower outer shell 2-2. An accommodation cavity for placing a control element 4 is formed inside the upper inner shell 1-1 and the lower inner shell 2-1, and a control element 4 is installed in the accommodation cavity, such as Figure 6 As shown, an electromagnetic isolation upper layer is installed between the upper inner shell 1-1 and the upper outer shell 1-2, and an electromagnetic isolation lower layer is installed between the lower inner shell 2-1 and the lower outer shell 2-2. The electromagnetic isolation upper layer and the electromagnetic isolation lower layer are symmetrically arranged, and are hereinafter collectively referred to as the electrical measurement isolation layer 3. From the inside to the outside, it sequentially includes an asbestos fiber flame retardant layer 3-1, a conductive plastic layer 3-2, and a flexible wave absorbing layer 3-3. The design of the electromagnetic isolation layer can achieve a good electromagnetic shielding effect.

[0030] In this embodiment, as Figure 6 shown, the upper inner shell 1-1, the asbestos fiber flame retardant layer 3-1, the conductive plastic layer 3-2, the flexible wave absorbing layer 3-3, and the upper outer shell 1-2 sequentially become higher to form an upper stepped portion, and the lower inner shell 2-1, the asbestos fiber flame retardant layer 3-1, the conductive plastic layer 3-2, the flexible wave absorbing layer 3-3, and the lower outer shell 2-2 sequentially become lower to form a lower stepped portion. The upper stepped portion and the lower stepped portion are fitted and connected tightly, which can ensure the electromagnetic shielding effect during use.

[0031] As Figure 1 , Figure 3 and Figure 7 shown, it further includes a locking structure 5. The locking structure includes a reinforcing strip 5-1, a claw 5-2, and an unlocking pressing plate 5-3. The reinforcing strip 5-1 is installed on the upper outer shell 1-2. Specifically, the reinforcing strip 5-1 covers the connection between the upper outer shell 1-2 and the lower outer shell 2-2. The claw 5-2 is installed on the lower outer shell 2-2. The reinforcing strip 5-1 is provided with a card slot 5-4 that matches the claw 5-2. One end of the claw 5-2 is placed in the card slot 5-4. The unlocking pressing plate 5-3 is installed adjacent to the reinforcing strip 5-1 on the upper outer shell. In this embodiment, the other end of the claw 5-2 is rotatably installed on the lower outer shell 2-2. One end of the claw 5-2 can be stuck at the card slot 5-4, and the claw 5-2 can also be pulled upward to remove it from the card slot 5-4. The reinforcing strip 5-1 covers the connection between the upper outer shell 1-2 and the lower outer shell 2-2, and cooperates with the settings of the claw 5-2 and the card slot 5-3 to prevent the connection of the outer shell from deforming and affecting the electromagnetic shielding effect.

[0032] As Figure 7As shown in the figure, the unlocking pressing plate 5-3 includes a pressing plate main body 5-3-1, a pushing part 5-3-2, and an unlocking part 5-3-3. The pressing plate main body 5-3-1, the pushing part 5-3-2, and the unlocking part 5-3-3 are integrally formed. The unlocking part 5-3-3 is arranged corresponding to the card slot. The pushing part 5-3-2 is arranged in the middle of the pressing plate main body 5-3-1. The pushing part 5-3-2 is provided with a strip-shaped protrusion. In this embodiment, the pushing part 5-3-2 is arranged in the middle of the pressing plate main body 5-3-1. The height of the pushing part 5-3-2 is higher than the height of the pressing plate main body 5-3-1. One side of the pushing part 5-3-2 is provided with a strip-shaped protrusion. The strip-shaped protrusion can increase the friction force during pushing. When pushing the unlocking pressing plate, it is convenient and quick to push the unlocking pressing plate by pressing against the strip-shaped protrusion with a finger.

[0033] Specifically, the reinforcing strip 5-1 includes a reinforcing strip main body and a locking part. The reinforcing strip main body and the locking part are integrally formed. The width of the locking part is smaller than the width of the reinforcing strip main body. A card slot 5-4 is formed between the locking part and the adjacent reinforcing strip main body. One end of the claw 5-2 is located in the card slot 5-4. The unlocking part 5-3-3 is provided with an inclined surface corresponding to the position of the claw 5-2. When pushing the unlocking pressing plate 5-3 to move towards the reinforcing strip 5-1, the inclined surface of the unlocking part 5-3-3 gradually inserts into the gap between the bottom of the card slot 5-4 and the claw 5-2. Through the continuous movement of the inclined surface, the claw 5-2 is forced to lift until it is finally at the same height as the reinforcing strip. At this time, the claw 5-2 no longer has a locking effect, and the upper shell and the lower shell can be opened. The structure is simple and easy to use.

[0034] Furthermore, the unlocking pressing plate 5-3 is provided with a limiting groove. A limiting post 5-3-4 is installed on the side wall of the upper outer shell corresponding to the limiting groove. The movement track of the unlocking pressing plate 5-3 is limited by the cooperation of the limiting groove and the limiting post 5-3-4. In this embodiment, a limiting plate is installed at the upper end of the limiting post 5-3-4. The width of the limiting plate is greater than the width of the limiting groove, which can prevent the pressing plate main body 5-3-1 from disengaging from the limiting post 5-3-4.

[0035] Such as Figure 2 、 Figure 5 、 Figure 8 and Figure 9As shown in the figure, it further includes an elastic structure 6. The elastic structure 6 includes an elastic plate 6-1, a connecting member 6-2, and an extrusion member 6-3. The elastic plate 6-1 is located on the side wall of the lower inner shell 2-1. The connecting member 6-2 is installed at both ends of the elastic plate 6-1. The connecting member 6-2 includes a fixed block 6-2-1 and a movable block 6-2-2. The fixed block 6-2-1 is installed on the side wall of the lower inner shell 2-1. One side of the movable block 6-2-2 is connected to both ends of the elastic plate 6-1, and the other side of the movable block 6-2-2 is connected to the fixed block 6-2-1. An extrusion groove is provided between the movable block 6-2-2 and the fixed block 6-2-1. The extrusion member 6-3 is installed on the side wall of the upper inner shell 1-1 corresponding to the extrusion groove. Both ends of the elastic plate 6-1 are connected to the movable block 6-2-2. Inclined surfaces are provided on both sides of the extrusion member 6-3. When the extrusion member 6-3 is inserted into the extrusion groove, the movable block 6-2-2 is forced to move towards each other, and the elastic plate 6-1 is forced to bend and abut against the lower inner shell 2-1, preventing the lower inner shell 2-1 from deforming and ensuring the electromagnetic shielding effect.

[0036] As Figure 9 shown, the connecting member 6-2 further includes a guide post 6-2-3. One end of the guide post 6-2-3 is installed on the fixed block 6-2-1, and the other end passes through the movable block 6-2-2. The guide post 6-2-3 can play the role of guiding and limiting the movable block 6-2-2.

[0037] As Figure 1 、 Figure 3 and Figure 4 shown, the control element 4 is provided with a toggle switch. The toggle switch includes a toggle plate 4-1. The toggle plate 4-1 is connected to the control element 4. The upper outer shell 1-2 is provided with a toggle slot through which a sliding baffle 4-2 is installed. The toggle plate 4-1 is installed at the switch slot 4-3 of the sliding baffle 4-2. The sliding baffle 4-2 can slide. Only the toggle plate 4-1 extends out of the switch slot 4-3, and the rest is still located in the inner shell, ensuring the electromagnetic shielding effect.

[0038] Specifically, the conductive plastic layer 3-2 includes resin and a conductive additive. The flexible wave-absorbing layer 3-3 includes an absorption medium. The absorption medium includes nanomaterials, planar hexagonal ferrites, amorphous magnetic fibers, and granular films. Setting these materials in the flexible wave-absorbing layer 3-3 can better ensure the electromagnetic shielding effect of the electromagnetic isolation layer 3.

[0039] When using the present invention, the control element is installed in the inner shell, and the upper shell and the lower shell are installed and connected together to ensure that the clamping claws are inserted into the card slots, thereby achieving electromagnetic shielding. When it is necessary to open the device, the unlocking pressure plate can be pushed by hand to open the clamping claws and release the locked state, and then the upper shell and the lower shell can be separated. It has good electromagnetic shielding effect, simple structure, and convenient use.

[0040] Generally speaking, an electromagnetic isolation layer including an asbestos fiber flame retardant layer, a conductive plastic layer and a flexible wave absorbing layer is provided between the inner shell and the outer shell of the present invention, and the electromagnetic shielding effect is good; the inner shell, the asbestos fiber flame retardant layer, the conductive plastic layer, the flexible wave absorbing layer and the outer shell are arranged in a stepped shape, and the stepped fitting design of the upper shell and the lower shell further enhances the electromagnetic shielding effect; the reinforcing strip can strengthen the strength of the connection between the upper shell and the lower shell, and with the setting of the locking mechanism, it can ensure that the connection will not deform and affect the electromagnetic shielding effect; the elastic plate of the elastic structure bends and abuts against the side wall of the lower inner shell, further strengthening the strength of the inner shell and preventing the lower shell from deforming.

[0041] The above embodiments are the preferred embodiments of the present invention, but the embodiments of the present invention are not limited by the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be equivalent replacement methods and are all included in the protection scope of the present invention.

Claims

1. A low-voltage power switch device, characterized in that, It includes an upper shell and a lower shell. The upper shell includes an upper inner shell and an upper outer shell, and the upper inner shell is installed inside the upper outer shell. The lower shell includes a lower inner shell and a lower outer shell, and the lower inner shell is installed inside the lower outer shell. The upper inner shell is connected to the lower inner shell, and the upper outer shell is connected to the lower outer shell. Control components are installed inside the upper inner shell and the lower inner shell. An upper electromagnetic isolation layer is installed between the upper inner shell and the upper outer shell, and a lower electromagnetic isolation layer is installed between the lower inner shell and the lower outer shell. The upper electromagnetic isolation layer and the lower electromagnetic isolation layer are symmetrically arranged, and sequentially include an asbestos fiber flame retardant layer, a conductive plastic layer, and a flexible wave-absorbing layer from the inside to the outside. It further includes an elastic structure. The elastic structure includes an elastic plate, a connecting member, and an extrusion member. The elastic plate is located on the side wall of the lower inner shell. The connecting member is installed at both ends of the elastic plate. The connecting member includes a fixed block and a movable block. The fixed block is installed on the side wall of the lower inner shell. One side of the movable block is connected to both ends of the elastic plate, and the other side of the movable block is connected to the fixed block. An extrusion groove is provided between the movable block and the fixed block, and the extrusion block is installed on the side wall of the upper inner shell corresponding to the extrusion groove. The connecting member further includes a guide post. One end of the guide post is installed on the fixed block, and the other end passes through the movable block.

2. The low-voltage power switch device according to claim 1, characterized in that, The upper inner shell, the asbestos fiber flame retardant layer, the conductive plastic layer, the flexible wave-absorbing layer, and the upper outer shell gradually become higher in sequence to form an upper stepped portion. The lower inner shell, the asbestos fiber flame retardant layer, the conductive plastic layer, the flexible wave-absorbing layer, and the lower outer shell gradually become lower in sequence to form a lower stepped portion. The upper stepped portion and the lower stepped portion are fitted and connected.

3. The low-voltage power switch device according to claim 1, characterized in that, It further includes a locking structure. The locking structure includes a reinforcing strip, a claw, and an unlocking pressure plate. The reinforcing strip is installed on the upper outer shell, the claw is installed on the lower outer shell, a card slot matching with the claw is provided on the reinforcing strip, one end of the claw is placed in the card slot, and the unlocking pressure plate is installed on the upper outer shell adjacent to the reinforcing strip.

4. The low-voltage power switch device according to claim 3, characterized in that, The unlocking pressure plate includes a pressure plate main body, a pushing portion, and an unlocking portion. The pressure plate main body, the pushing portion, and the unlocking portion are integrally formed. The unlocking portion is arranged corresponding to the card slot. The pushing portion is provided in the middle of the pressure plate main body, and a strip-shaped protrusion is provided on the pushing portion.

5. An electric low-voltage switch device according to claim 4, characterized in that, The reinforcing strip includes a reinforcing strip main body and a locking portion. The reinforcing strip main body and the locking portion are integrally formed. The width of the locking portion is smaller than that of the reinforcing strip main body. A card slot is formed between the locking portion and the adjacent reinforcing strip main body. One end of the claw is located in the card slot, and an inclined surface corresponding to the position of the claw is provided on the unlocking portion.

6. The low-voltage power switch device according to claim 3, characterized in that, A limiting groove is provided on the unlocking pressure plate, and a limiting post is installed on the side wall of the upper outer shell corresponding to the limiting groove.

7. An electric low-voltage switch device according to claim 1, characterized in that, The control component is provided with a toggle switch. The toggle switch includes a toggle plate. The toggle plate is connected to the control component. A toggle slot is formed through the upper outer shell, a sliding baffle is installed in the toggle slot, and the toggle switch is installed in the switch slot of the sliding baffle.

8. A low-voltage power switch device according to claim 1, characterized in that, The conductive plastic layer includes resin and a conductive additive. The flexible wave-absorbing layer includes an absorption medium. The absorption medium includes nanomaterials, planar hexagonal ferrites, amorphous magnetic fibers, and particulate films.

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