CN215933596U

CN215933596U - Electrostatic protection structure of diode-triggered silicon controlled rectifier for integrated circuit

Info

Publication number: CN215933596U
Application number: CN202122283268.9U
Authority: CN
Inventors: 陈智
Original assignee: Shenzhen Yuhong Microelectronics Technology Co ltd
Current assignee: Shenzhen Yuhong Microelectronics Technology Co ltd
Priority date: 2021-09-22
Filing date: 2021-09-22
Publication date: 2022-03-01
Anticipated expiration: 2031-09-22

Abstract

The utility model discloses an electrostatic protection structure of diode-triggered silicon controlled rectifier for integrated circuit, which relates to the technical field of electrostatic protection equipment and comprises a protective cover, wherein electrostatic conductors are uniformly arranged on the side wall of the protective cover at intervals, conductive rods are arranged at the top ends of the electrostatic conductors, the other ends of the conductive rods are respectively and fixedly connected to the side wall of an electrostatic capacitor, the electrostatic capacitor is arranged at the top of the protective cover, a discharge rod is arranged on the outer wall of one side of the electrostatic capacitor, the tail end of the discharge rod is fixedly connected with a lead, the other end of the lead is connected with a ground wire of a circuit substrate, when static electricity appears on the circuit board, the static electricity is absorbed by the electrostatic conductors on the side wall of the protective cover, then the static electricity is transmitted to the electrostatic capacitor at the top of the protective cover through the conductive rods at the top of the electrostatic conductors, the static electricity in the electrostatic capacitor is discharged through a tip, and is transmitted to the lead at the tail end of the conductive rods at one side of the electrostatic capacitor, the grounding wire of the circuit board connected by the conducting wire completes the electrostatic discharge to the ground, thereby performing the anti-electrostatic protection on the controlled silicon.

Description

Electrostatic protection structure of diode-triggered silicon controlled rectifier for integrated circuit

Technical Field

The utility model relates to the technical field of electrostatic protection equipment, in particular to an electrostatic protection structure of diode-triggered silicon controlled rectifier for an integrated circuit.

Background

The thyristor is called SCR for short, and is a high-power electrical component, also called thyristor. It has the advantages of small volume, high efficiency, long service life, etc. In an automatic control system, the device can be used as a high-power driving device to realize the control of high-power equipment by using a low-power control. It is widely applied to speed regulating systems, power regulating systems and follow-up systems of alternating current and direct current motors. The controllable silicon is divided into a unidirectional controllable silicon and a bidirectional controllable silicon. The TRIAC is also called a TRIAC, abbreviated to TRIAC. The bidirectional thyristor is structurally equivalent to two unidirectional thyristors which are reversely connected, and the bidirectional thyristor has a bidirectional conduction function. The on-off state of which is determined by the gate G. The positive (or negative) pulse is applied to the control electrode G to turn it on in the positive (or reverse) direction. The device has the advantages of simple control circuit and no reverse voltage resistance problem, and is particularly suitable for being used as an alternating-current contactless switch.

However, the silicon controlled rectifier installed in the existing integrated circuit lacks a static electricity protection device, and a large amount of static electricity is generated after dust is accumulated on the integrated circuit board, and the static electricity can affect the internal electronic components of the silicon controlled rectifier, so that the electronic components are in poor contact, and in serious cases, the electronic components are directly damaged, which brings troubles to the use of the integrated circuit.

Therefore, an electrostatic protection structure of diode-triggered silicon controlled rectifier for integrated circuit is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an electrostatic protection structure of a diode-triggered thyristor for an integrated circuit, which can perform electrostatic protection on the thyristor in the integrated circuit, absorb static electricity generated on the integrated circuit board and then guide the absorbed static electricity into a grounding wire of the circuit board to complete the discharge of the static electricity to the ground, thereby solving the problems in the background.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides an integrated circuit is with static protective structure of diode trigger silicon controlled rectifier, includes the protection casing, the protection casing is used for installing and prevents static isolation in the outside of silicon controlled rectifier, even interval is provided with the static conductor on the lateral wall of protection casing, the top of static conductor is provided with the conducting rod, the other end difference fixed connection of conducting rod is on the lateral wall of electrostatic capacitance, electrostatic capacitance sets up in the top of protection casing, and be provided with the discharge rod on one side outer wall of electrostatic capacitance, the terminal fixedly connected with wire of discharge rod, the earth connection of the other end connecting circuit base plate of wire, and be close to bottom department on the outer wall of protection casing both sides and be provided with the connecting piece, the connecting piece connecting circuit base plate is fixed in the outside of silicon controlled rectifier with the protection casing.

Furthermore, a wire clamping port is formed in the outer wall of one side of the port at the bottom of the protective cover and used for clamping a fixed pin of the silicon controlled rectifier.

Further, the protection casing includes lower extreme open-ended tube-shape casing, and the laminating is provided with the insulating layer on the outer wall of tube-shape casing, and the insulating layer is provided with antistatic coating on keeping away from one side outer wall of tube-shape casing, and even interval runs through on the lateral wall of tube-shape casing, insulating layer and antistatic coating and has seted up ventilative micropore.

Further, a breathable film is attached to the inner wall of the cylindrical shell and fixedly connected to the inner wall of the cylindrical shell outside the breathable micropore port through adhesion.

Further, the connecting piece includes the fixed plate that is connected with the protection casing, and the upper end of fixed plate is provided with the clamshell, and fixedly connected with spacing on the outer wall of fixed plate bottom opening both sides, and it is provided with spacing lug to be close to bottom department on the outer wall that spacing was carried on the back mutually, is provided with the dead lever between the inner wall at clamshell both ends, and the wedge has been cup jointed in the activity on the outer wall of dead lever, runs through on the clamshell lateral wall of dead lever lower extreme one side and is provided with accommodate the lead screw, and accommodate the lead screw runs through the wedge setting.

Further, be provided with supporting spring on the outer wall of fixed plate top opening both sides, supporting spring top fixed connection is in the limiting plate bottom of carriage release lever both sides, and the carriage release lever activity cup joints in the opening on the fixed plate, and its top laminating wedge bottom inclined plane sets up, carriage release lever lower extreme both sides swing joint has the connecting rod, the lower extreme of connecting rod respectively with spacing terminal lateral wall swing joint.

Further, when the supporting spring keeps a normal relaxation state, the limiting strips are arranged in a vertical shape parallel to each other, and after the supporting spring is compressed, the non-fixed ends of the limiting strips are splayed outwards.

Compared with the prior art, the utility model has the following beneficial effects:

1. the utility model provides an electrostatic protection structure of diode-triggered silicon controlled rectifier for integrated circuit, which is characterized in that electrostatic conductors are uniformly arranged on the side wall of a protective cover at intervals, a conductive rod is arranged at the top end of each electrostatic conductor, the other end of each conductive rod is respectively and fixedly connected to the side wall of an electrostatic capacitor, the electrostatic capacitor is arranged at the top of the protective cover, a discharge rod is arranged on the outer wall of one side of the electrostatic capacitor, the tail end of the discharge rod is fixedly connected with a lead, the other end of the lead is connected with a ground wire of a circuit substrate, when static electricity appears on a circuit board, the static electricity is absorbed by the electrostatic conductors on the side wall of the protective cover, then the static electricity is transmitted to the electrostatic capacitor at the top of the protective cover through the conductive rods at the top of the electrostatic conductors, the static electricity in the electrostatic capacitor is discharged through a tip, and is transmitted to the lead at one side of the electrostatic capacitor and is connected with the ground wire of the circuit board through the lead, the static electricity is released to the ground, so that the silicon controlled rectifier in the protective cover is effectively protected against static electricity.

2. The utility model provides an electrostatic protection structure of diode-triggered silicon controlled rectifier for integrated circuit, a fixed plate is connected with a protective cover, a shell is arranged at the upper end of the fixed plate, a limit strip is fixedly connected on the outer walls of two sides of an opening at the bottom of the fixed plate, a limit lug is arranged on the outer wall opposite to the limit strip and close to the bottom, a fixed rod is arranged between the inner walls of two ends of the shell, a wedge block is movably sleeved on the outer wall of the fixed rod, an adjusting screw rod is arranged on the side wall of the shell on one side of the lower end of the fixed rod in a penetrating way and penetrates through the wedge block, a supporting spring is arranged on the outer walls of two sides of the opening at the top of the fixed plate, the top end of the supporting spring is fixedly connected to the bottom of a limit plate on two sides of a movable rod, the movable rod is movably sleeved in the opening on the fixed plate, the top end of the movable rod is attached to the inclined plane of the bottom of the wedge block, two sides of the lower end of the movable rod are movably connected with connecting rods, respectively with the side walls at the tail end of the limit strip, control the wedge through rotatory accommodate the lead screw and control about on the dead lever outer wall to make the wedge promote the carriage release lever cooperation supporting spring reciprocate in the opening on the fixed plate, make the opening and the closure of the spacing non-stiff end in bottom of connecting rod control of carriage release lever lower extreme, thereby accomplish spacing groove on spacing lug lock circuit board mounting hole both sides inner wall on its outer wall and remove, realize fixed with the unblock to the installation of protective housing, make things convenient for the installation dismantlement of later stage maintenance, convenient practicality.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a partial cross-sectional view of the shield of the present invention;

FIG. 3 is a schematic view of a connector structure of the present invention;

fig. 4 is a cross-sectional view of the housing of the present invention.

In the figure: 1. a protective cover; 11. a cylindrical housing; 12. an insulating layer; 13. an antistatic coating; 14. air-permeable micropores; 15. a gas permeable membrane; 2. an electrostatic conductor; 3. a conductive rod; 4. an electrostatic capacitance; 5. a discharge rod; 6. a wire; 7. a connecting member; 71. a fixing plate; 72. a housing; 73. a limiting strip; 74. a limiting bump; 75. fixing the rod; 76. a wedge block; 77. adjusting the screw rod; 78. a support spring; 79. a travel bar; 710. a limiting plate; 711. a connecting rod; 8. and a wire clamping port.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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 order to solve the problem that the silicon controlled rectifier on the integrated circuit board is lack of the anti-static device and is easily damaged by static electricity, please refer to fig. 1-2, the following preferred technical solutions are proposed:

a static protection structure of a diode-triggered silicon controlled rectifier for an integrated circuit comprises a protective cover 1, wherein the protective cover 1 is used for being installed outside the silicon controlled rectifier for static isolation, static conductors 2 are uniformly arranged on the side wall of the protective cover 1 at intervals, a conductive rod 3 is arranged at the top end of each static conductor 2, the other end of each conductive rod 3 is fixedly connected to the side wall of a static capacitor 4, each static capacitor 4 is arranged at the top of the protective cover 1, a discharge rod 5 is arranged on the outer wall of one side of each static capacitor 4, the tail end of each discharge rod 5 is fixedly connected with a lead 6, the other end of each lead 6 is connected with a ground wire of a circuit substrate, a connecting piece 7 is arranged on the outer wall of each side of the protective cover 1 close to the bottom, and the protective cover 1 is fixed outside the silicon controlled rectifier through the connecting piece 7 and the circuit substrate; a wire clamping port 8 is formed in the outer wall of one side of the bottom port of the protective cover 1 and used for clamping a fixed pin of the silicon controlled rectifier.

Specifically, utilize 7 connecting circuit base plates of connecting piece to be fixed in the outside of silicon controlled rectifier with protection casing 1, install the fixed pin of the silicon controlled rectifier of card line mouth 8 card on the lateral wall of protection casing 1 bottom, when static appears on the circuit board, static is absorbed by electrostatic conductor 2 on the lateral wall of protection casing 1, static is in the conducting rod 3 that passes through electrostatic conductor 2 top transmits electrostatic capacitance 4 at protection casing 1 top after that, the inside static of electrostatic capacitance 4 is through point discharge, in the conducting rod 3 transmission to its terminal wire 6 from electrostatic capacitance 4 one side, circuit board earth connection through wire 6 connects, accomplish the ground release of static, thereby carry out effectual antistatic protection to the silicon controlled rectifier of protection casing 1 inside.

In order to enhance the anti-static effect of the protective cover 1, an insulating layer 12 is attached to the outer wall of the cylindrical shell 11 of the protective cover 1, an anti-static coating 13 is arranged on the outer wall of one side, away from the cylindrical shell 11, of the insulating layer 12, ventilation micropores 14 are formed in the side walls of the insulating layer 12 and the anti-static coating 13 at uniform intervals in a penetrating mode, a ventilation film 15 is attached to the inner wall of the cylindrical shell 11, the ventilation film 15 is fixedly connected to the inner wall of the cylindrical shell 11 outside the port of the ventilation micropores 14 through adhesion, the ventilation micropores 14 are matched with the ventilation film 15 to achieve ventilation and heat dissipation of silicon controlled inside the protective cover 1, meanwhile, the insulating layer 12 and the anti-static coating 13 on the outer wall of the cylindrical shell 11 are subjected to anti-static isolation, and electrostatic contact with the cylindrical shell 11 is avoided.

In order to realize quick installation of the anti-static device and facilitate subsequent overhaul and disassembly, please refer to fig. 3 and 4, the following preferred technical scheme is proposed:

the connecting piece 7 comprises a fixing plate 71 connected with the protective cover 1, a shell 72 is arranged at the upper end of the fixing plate 71, the outer walls of two sides of a through hole at the bottom of the fixing plate 71 are fixedly connected with limiting strips 73, a limiting lug 74 is arranged on the outer wall, opposite to the limiting strips 73, close to the bottom, a fixing rod 75 is arranged between the inner walls of two ends of the shell 72, a wedge block 76 is movably sleeved on the outer wall of the fixing rod 75, an adjusting screw rod 77 is arranged on the side wall of the shell 72 on one side of the lower end of the fixing rod 75 in a penetrating mode, and the adjusting screw rod 77 is arranged in a penetrating mode through the wedge block 76; be provided with supporting spring 78 on the outer wall of fixed plate 71 top opening both sides, supporting spring 78 top fixed connection is in the limiting plate 710 bottom of carriage release lever 79 both sides, and in the opening on fixed plate 71 was cup jointed in the carriage release lever 79 activity, the inclined plane setting in 76 bottoms of its top laminating wedge, carriage release lever 79 lower extreme both sides swing joint has connecting rod 711, the lower extreme of connecting rod 711 respectively with the terminal lateral wall swing joint of spacing 73.

When the supporting spring 78 keeps a normal relaxation state, the limiting strips 73 are vertically arranged in parallel, and after the supporting spring 78 is compressed, the non-fixed ends of the limiting strips 73 are splayed outwards.

Specifically, the limiting strips 73 at the bottom of the fixing plate 71 are inserted into the mounting holes on the circuit board, the adjusting screw rod 77 is rotated to enable the wedge block 76 to move towards one side of the handheld end of the adjusting screw rod 77 on the outer wall of the fixing rod 75, the wedge block 76 pushes the moving rod 79 to move downwards when moving, the limiting plates 710 at two sides of the wedge block are pushed to compress the supporting springs 78, when the moving rod 79 moves downwards in the through hole on the fixing plate 71, the moving rod 79 pushes the connecting rods 711 at two sides of the bottom of the wedge block to open the non-fixed ends of the limiting strips 73, the limiting lugs 74 on the outer wall of the wedge block are enabled to be buckled with the limiting grooves on the inner walls at two sides of the mounting holes of the circuit board, so that the mounting and fixing of the protective cover 1 are completed, and the adjusting screw rod 77 is rotated reversely to release the mounting and fixing of the protective cover 1.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an integrated circuit triggers electrostatic protection structure of silicon controlled rectifier with diode, includes protection casing (1), and protection casing (1) are used for installing and prevent electrostatic isolation, its characterized in that in the outside of silicon controlled rectifier: the utility model discloses a protection casing, including protection casing (1), the lateral wall of protection casing (1) is last even interval to be provided with electrostatic conductor (2), the top of electrostatic conductor (2) is provided with conducting rod (3), the other end difference fixed connection of conducting rod (3) is on the lateral wall of electrostatic capacitance (4), electrostatic capacitance (4) set up in the top of protection casing (1), and be provided with discharge rod (5) on one side outer wall of electrostatic capacitance (4), terminal fixedly connected with wire (6) of discharge rod (5), the earth connection of the other end connecting circuit base plate of wire (6), and be close to bottom department on protection casing (1) both sides outer wall and be provided with connecting piece (7), connecting piece (7) connecting circuit base plate is fixed in the outside of silicon controlled rectifier with protection casing (1).

2. The structure of claim 1, wherein the structure comprises: the wire clamping port (8) is formed in the outer wall of one side of the port at the bottom of the protective cover (1) and used for clamping a fixed pin of the silicon controlled rectifier.

3. The structure of claim 2, wherein the structure comprises: the protective cover (1) comprises a cylindrical shell (11) with an opening at the lower end, an insulating layer (12) is attached to the outer wall of the cylindrical shell (11), an anti-static coating (13) is arranged on the outer wall of one side, away from the cylindrical shell (11), of the insulating layer (12), and air-permeable micropores (14) are formed in the side walls of the cylindrical shell (11), the insulating layer (12) and the anti-static coating (13) in a penetrating mode at even intervals.

4. The structure of claim 3, wherein the structure comprises: the inner wall of the cylindrical shell (11) is provided with a breathable film (15) in a fitting manner, and the breathable film (15) is fixedly connected to the inner wall of the cylindrical shell (11) outside the port of the breathable micropore (14) through adhesion.

5. The structure of claim 1, wherein the structure comprises: connecting piece (7) include fixed plate (71) that are connected with protection casing (1), the upper end of fixed plate (71) is provided with clamshell (72), and fixedly connected with spacing (73) on the outer wall of fixed plate (71) bottom opening both sides, be close to bottom department on the outer wall that spacing (73) were carried on the back mutually and be provided with spacing lug (74), be provided with dead lever (75) between the inner wall at clamshell (72) both ends, wedge (76) have been cup jointed in the activity on the outer wall of dead lever (75), it is provided with accommodate the lead screw (77) to run through on clamshell (72) lateral wall of dead lever (75) lower extreme one side, accommodate the lead screw (77) run through wedge (76) and set up.

6. The structure of claim 5, wherein the structure comprises: be provided with supporting spring (78) on fixed plate (71) top opening both sides outer wall, supporting spring (78) top fixed connection is in limiting plate (710) bottom of carriage release lever (79) both sides, and in carriage release lever (79) activity cup jointed the opening on fixed plate (71), the setting of its top laminating wedge (76) bottom inclined plane, carriage release lever (79) lower extreme both sides swing joint has connecting rod (711), the lower extreme of connecting rod (711) respectively with spacing (73) terminal lateral wall swing joint.

7. The structure of claim 6, wherein the structure comprises: when supporting spring (78) kept normal diastole state, spacing (73) are the vertical form setting that is parallel to each other, and supporting spring (78) is compressed back, and the non-stiff end of spacing (73) is the splayed and outwards struts.