CN216054507U - Pressing plate limiting structure of solid-state relay - Google Patents

Abstract

The utility model relates to a pressure plate limiting structure of a solid-state relay, which comprises a shell and an external terminal fixed on the shell, wherein an upper cover is arranged above the shell, a wire pressure plate is arranged above the external terminal, a pressing cavity of an external wire is formed between the external terminal and the wire pressure plate, the external terminal is provided with a threaded hole, a bolt matched with the threaded hole is arranged in the wire pressure plate in a penetrating way, the cross section of the wire pressure plate is in a regular polygon shape, and the upper cover and the wire pressure plate are correspondingly provided with limiting grooves which are used for accommodating the wire pressure plate and are abutted against at least two side surfaces of the wire pressure plate. By adopting the scheme, the utility model provides the pressing plate limiting structure of the solid-state relay, which can improve the wiring efficiency.

Description

Pressing plate limiting structure of solid-state relay

Technical Field

The utility model relates to the field of solid-state relays, in particular to a pressing plate limiting structure of a solid-state relay.

Background

The solid relay is a non-contact switch composed of microelectronic circuit, discrete electronic device and power electronic power device. The isolation of the control end and the load end is realized by the isolation device. The input end of the solid-state relay uses a tiny control signal to directly drive a heavy-current load.

Solid-state relay includes the casing and is fixed in the external terminal on the casing, external terminal top is provided with the wire clamp plate, form the chamber that compresses tightly of external wire between external terminal and the wire clamp plate, external terminal wears to be equipped with and passes the wire clamp plate and with casing screw-thread fit's bolt, this kind of structure need process screw hole on the casing, increase the processing complexity when making casing intensity reduce, and simultaneously, at the rotatory in-process of bolt, the wire clamp plate can rotate along with the bolt, take away from external wire from compressing tightly the chamber, influence wiring efficiency.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model aims to provide a pressing plate limiting structure of a solid-state relay, which can improve the wiring efficiency.

In order to achieve the purpose, the utility model provides the following technical scheme: including the casing and be fixed in the external terminal on the casing, casing top be provided with the upper cover, external terminal top be provided with the wire clamp plate, external terminal and wire clamp plate between form the chamber that compresses tightly of external wire, its characterized in that: the external terminal be provided with the screw hole, the wire clamp plate wear to be equipped with screw hole complex bolt, the wire clamp plate cross-section be regular polygon, the upper cover correspond with the wire clamp plate and be provided with the holding wire clamp plate and with the spacing recess that wire clamp plate both sides side at least offseted.

Through adopting above-mentioned technical scheme, shift the screw hole to external terminal from the casing, reduce the processing of casing screw hole, guarantee casing intensity when simplifying processing, because external terminal generally is the metal material, can easily when guaranteeing intensity, high-efficient processing screw hole, thereby also can guarantee external conductor's connection stability, simultaneously, add the spacing recess that holding wire clamp plate and offset with the wire clamp plate both sides side at least, thereby can not take off the line because of driving the wire clamp plate rotation when making the bolt rotatory, improve the convenience of wiring.

The utility model is further configured to: the casing be provided with the terminal recess of binding post shape looks adaptation, the casing fixed be provided with the upper cover and by the upper cover with external terminal spacing in the terminal recess when fixed, binding post both sides be provided with the curved foot that inserts the casing respectively.

By adopting the technical scheme, the terminal groove is additionally arranged, so that the assembly of the external terminal is automatically realized when the shell is fixed with the upper cover, and the assembly stability is greatly increased by matching the bent pins on two sides of the wiring terminal.

Drawings

FIG. 1 is a top perspective view of an embodiment of the present invention;

FIG. 2 is a perspective assembly view of an embodiment of the present invention;

fig. 3 is a schematic view illustrating the mounting of the power device, the metal substrate and the first external connection terminal according to the embodiment of the present invention;

fig. 4 is a first external connection terminal according to a first embodiment of the present invention;

fig. 5 is a second embodiment of the first external terminal according to the embodiment of the present invention;

FIG. 6 is a bottom perspective view of an embodiment of the present invention;

FIG. 7 is a schematic view of the under-mount mounting of a circuit board according to an embodiment of the present invention;

FIG. 8 is a schematic view of the top-mounted mounting of a circuit board according to an embodiment of the present invention;

FIG. 9 is a schematic view of the installation of a flip cover in an embodiment of the present invention;

FIG. 10 is a cross-sectional view of an upper cover and a light pipe in accordance with one embodiment of the present invention;

FIG. 11 is a longitudinal cross-sectional view of an upper cover and a light pipe in accordance with an embodiment of the present invention;

FIG. 12 is a perspective view of a light guide bar according to an embodiment of the present invention.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1-11, the utility model discloses a low temperature rise solid state relay, which comprises a housing 1 and a power element 2 arranged in the housing 1, wherein the bottom of the housing 1 is a metal substrate 6, the metal substrate 6 comprises a metal base layer, an insulating layer and a conductive layer which are sequentially arranged from outside to inside relative to the housing 1, the appearance cannot be shown and observed but the structure understanding is not influenced because the three layers are integrated into a whole, the power element 2 is welded on the conductive layer, the metal substrate is a component which is general in the electrical appliance industry and generally comprises an iron substrate, an aluminum substrate, a copper substrate and the like, the metal substrate generally comprises the metal base layer, the insulating layer and the conductive layer, the metal substrate has a smaller thickness and a more excellent heat dissipation function in a way of superposing a ceramic sheet relative to an aluminum plate, and meanwhile, the conductive layer is integrated on the metal substrate, thereby simplifying a circuit connection structure in the solid state relay, the structure is more simplified.

As shown in fig. 3, the conductive layer includes a first electrical connection region 61 and a second electrical connection region 62 respectively welded to the power element 2, the housing 1 is provided with a first external terminal 11, the first external terminal 11 is provided with a first pin 111 extending into the housing 1, the first pin 111 is provided with a conductive bend 113 abutting against the first electrical connection region 61, the conductive layer of the metal substrate 6 is reasonably utilized, so that the first external terminal 11 (connected as required, generally used as a load terminal) can be quickly electrically connected to the power element 2, the circuit structure is more simplified and compact, the conductive bend 113 can increase the contact area between the first pin 111 and the first electrical connection region 61, and thus reliability and stability are improved.

The conductive bend 113 is welded with a metal flow guide part 114 electrically connected with the power element 2, and when a high load is carried, a large current is directly transmitted to the load end through the metal flow guide part 114 without passing through the metal substrate, so that a heat dissipation bridge is formed, the current carrying area is increased, the heat productivity of the metal substrate is greatly reduced, and the temperature rise is reduced, thereby ensuring the working stability under the high load, and in the specific embodiment, the metal flow guide part 114 is a metal conductive sheet.

As shown in fig. 4, the housing 1 is provided with the second external terminal 12 on the same side as the first external terminal 11, the first external terminal 11 and the second external terminal 12 are respectively provided with a threaded hole 115, and as a lead installation manner, the external terminal is provided with the threaded hole 115 matched with a bolt, so that the external structure is more simplified.

As shown in fig. 5, the housing 1 is provided with a second external terminal 12 on the same side as the first external terminal 11, the first external terminal 11 and the second external terminal 12 are respectively provided with an installation through hole 116, and the housing 1 is provided with a regular hexagonal wiring groove 15 below each installation through hole 116, as another wire installation method, the head of a bolt can be placed in the wiring groove 15, and the nut is matched to implement installation of a wire, which is selected to be used with the previous wire installation method.

As shown in fig. 6, the housing 1 is provided with a fixing post 16 penetrating through the metal substrate 6 and riveted to the bottom of the metal substrate 6, and the fixing post 16 penetrates through the metal substrate 6 and riveted, so that the housing 1 and the metal substrate 6 are fixed more simply and reliably.

As shown in fig. 7, a circuit board 3 is disposed in a housing 1, supporting blocks 17 are disposed on two sides of the housing 1 below the circuit board 3, the housing 1 is provided with a first external terminal 11 and a second external terminal 12 (connected as required, generally used as load terminals) on the same side and a third external terminal 13 and a fourth external terminal 14 (connected as required, generally used as signal terminals) on the other side, limiting recesses 31 are disposed on the side of the circuit board 3 corresponding to the first external terminal 11 and the second external terminal 12, the first external terminal 11 is provided with a first pin 111 adapted to the shape of the limiting recess 31 and a first limiting bend 112 pressing on the circuit board 3, the second external terminal 12 is provided with a second pin 121 adapted to the shape of the limiting recess 31 and a second limiting bend 122 pressing on the circuit board 3, the circuit board 3 corresponds with third external terminal 13 and fourth external terminal 14 respectively and is provided with first connecting hole 32, third external terminal 13 is provided with and stretches into welded third pin 131 behind first connecting hole 32, fourth external terminal 14 is provided with and stretches into welded fourth pin 141 behind first connecting hole 32, support in circuit board 3 by supporting shoe 17, 1 inner space of rational utilization casing is used for installing circuit board 3, and simultaneously, the pin of the first external terminal 11 that the cooperation has now and the spacing of addding is bent, realize circuit board 3's stable installation, make the structure more compact, retrench.

As shown in FIG. 8, a circuit board 3 is disposed in a housing 1, the housing 1 is provided with a first external terminal 11 and a second external terminal 12 on the same side and a third external terminal 13 and a fourth external terminal 14 on the other side, the first external terminal 11, the second external terminal 12, the third external terminal 13 and the fourth external terminal 14 are respectively provided with a supporting portion 10 supported below the circuit board 3, the circuit board 3 is provided with a second connecting hole 33 corresponding to each supporting portion 10, each supporting portion 10 is provided with a supporting pin 101 inserted into the second connecting hole 33, as a mounting manner of the circuit board 3, the supporting portion 10 of each external terminal supports the circuit board 3 to ensure supporting reliability, and the supporting pin 101 of the supporting portion 10 is inserted into the second connecting hole 33 to realize positioning and electrical connection, thereby making the structure more reliable, It is simple and can increase the space of the built-in element.

As shown in fig. 9, an upper cover 4 is disposed above the housing 1, the upper cover and the lower cover are generally fixed by snap-fitting, two sides of the upper cover 4 are respectively provided with a flip groove 41 and a flip 42 hinged to the inner side of the flip groove 41, the design value of the hinged position of the flip 42 is designed to be the inner side of the flip groove 41, thereby avoiding affecting the matching of adjacent solid-state relays when hinged to the outer side, one end of the flip 42 is used as a hinged end 421 with a rotating bump 422 on two sides, the other end is used as a flip end 423 with a limiting bump 424 on two sides, and the flip groove 41 is provided with a rotating hole 411 rotationally matched with the rotating bump 422 and a limiting hole 412 in limiting matching with the limiting bump 424.

The wire pressing plate comprises a wire pressing plate 18, an upper cover 4 is arranged above a shell 1, the wire pressing plate 18 is provided with a bolt 119 in threaded fit with a threaded hole 115, a pressing cavity of an external wire is formed between the external terminals (namely a first external terminal, a second external terminal, a third external terminal and a fourth external terminal, taking the first external terminal 11 in fig. 4 as an example) and the wire pressing plate 18, the shell 1 is provided with a terminal groove 110 (see fig. 7) matched with the shape of the wire connecting terminal, when the shell 1 is fixed with the upper cover 4, the external terminals are limited in the terminal groove 110 by the upper cover 4, two sides of the wire connecting terminal are respectively provided with a bent pin 118 inserted into the shell, the upper cover 4 and the wire pressing plate 18 are correspondingly provided with a limiting groove 43 which is used for accommodating the wire pressing plate 18 and is in limiting fit with two side surfaces of the wire pressing plate 18, the cross section of the wire pressing plate 18 is in a regular polygon shape, the square shape is preferably selected in the embodiment, and the limiting groove 43 is additionally arranged, the rotation of the wire pressing plate 18 is limited, so that the wire cannot be disconnected due to the fact that the wire pressing plate is driven to rotate when the bolt 119 rotates, and the convenience of wiring is improved.

As shown in fig. 10, 11 and 12, an upper cover 4 is disposed above a housing 1, the upper cover 4 is vertically provided with a light guide pillar 5 and a mounting ring 19 through which the light guide pillar 5 passes, the light guide pillar 5 is respectively provided with a first clamping protrusion 51 disposed at two lateral sides and a second clamping protrusion 52 disposed at two longitudinal sides and below the first clamping protrusion 51, a distance between the second clamping protrusion 52 and a center of the light guide pillar 5 is larger than a distance between the first clamping protrusion 51 and a center of the light guide pillar 5, a guiding inclined plane 53 gradually approaching the light guide pillar 5 is disposed below the second clamping protrusion 52, a first clamping platform 191 limited below the first clamping protrusion 51 and a second clamping platform 192 limited above the second clamping protrusion 52 are disposed in the mounting ring 19, a light source for indicating a state is generally disposed in the housing 1, the light guide pillar 5 guides light emitted from the light source to an outer side, the light guide pillar 5 can be automatically clamped and fitted after being inserted into the mounting ring 19 from above the upper cover, the convenience of assembly is improved.

Claims (2)

1. The utility model provides a solid-state relay's clamp plate limit structure, includes the casing and is fixed in the external terminal on the casing, casing top be provided with the upper cover, external terminal top be provided with the wire clamp plate, external terminal and wire clamp plate between form the chamber that compresses tightly of external wire, its characterized in that: the external terminal be provided with the screw hole, the wire clamp plate wear to be equipped with screw hole complex bolt, the wire clamp plate cross-section be regular polygon, the upper cover correspond with the wire clamp plate and be provided with the holding wire clamp plate and with the spacing recess that wire clamp plate both sides side at least offseted.

2. The solid-state relay pressure plate limiting structure according to claim 1, characterized in that: the casing be provided with the terminal recess of binding post shape looks adaptation, the casing fixed be provided with the upper cover and by the upper cover with external terminal spacing in the terminal recess when fixed, binding post both sides be provided with the curved foot that inserts the casing respectively.

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