阅读说明：本技术 一种具有双重防过载功能的按钮式移动插座 (Button type mobile socket with dual overload prevention function ) 是由 徐学礼 于 2020-08-04 设计创作，主要内容包括：本发明具体是一种具有双重防过载功能的按钮式移动插座,解决了现有防过载移动插座无法防护单个插孔、结构复杂难以推广的问题。一种具有双重防过载功能的按钮式移动插座,金属簧片夹呈Ω形,且其圆弧部的一侧固定连接有第一形状记忆合金部件；绝缘按钮的上部贯穿开关壳体的上壁,绝缘按钮的底部固定连接有一个动接线片,动接线片的其中一个表面一体设置有动触点；开关壳体上固定有静接线片,静接线片与动接线片相向的表面上一体设置有静触点,动接线片和与其相向的开关壳体内壁之间设置有第二形状记忆合金部件。本发明实现了按钮开关断电及插孔断电的双重防过载保护,具有结构简单、响应灵敏、安全性高、成本低、适用范围广、易于推广的优点。(The invention particularly relates to a button type mobile socket with double overload prevention functions, which solves the problems that the existing overload prevention mobile socket cannot protect a single jack and is complex in structure and difficult to popularize. A push-button type mobile socket with double overload prevention functions is characterized in that a metal reed clip is in an omega shape, and one side of an arc part of the metal reed clip is fixedly connected with a first shape memory alloy part; the upper part of the insulating button penetrates through the upper wall of the switch shell, the bottom of the insulating button is fixedly connected with a movable lug plate, and one surface of the movable lug plate is integrally provided with a movable contact; a static wiring sheet is fixed on the switch shell, a static contact is integrally arranged on the surface of the static wiring sheet opposite to the movable wiring sheet, and a second shape memory alloy part is arranged between the movable wiring sheet and the inner wall of the switch shell opposite to the movable wiring sheet. The invention realizes double overload protection of button switch power-off and jack power-off, and has the advantages of simple structure, sensitive response, high safety, low cost, wide application range and easy popularization.)

1. A push-button type mobile socket with double overload prevention functions comprises a socket shell, a power supply circuit, a push-button switch and a plurality of metal reed clips (1); the power supply circuit and each metal reed clip (1) are arranged inside the socket shell; the method is characterized in that: the metal reed clip (1) is in an omega shape, and one side of the arc part of the metal reed clip is fixedly connected with a first shape memory alloy part (2) which is attached to the arc surface of the metal reed clip;

the button switch comprises a switch shell (3) and an insulating button (4), wherein the switch shell (3) is arranged inside the socket shell, and the upper wall of the switch shell is connected with the upper wall of the socket shell into a whole; the upper part of the insulating button (4) penetrates through the upper wall of the switch shell (3), and a return spring (5) is vertically arranged between the upper part and the lower part; the bottom of the insulating button (4) is fixedly connected with a movable wiring sheet (6), and one surface of the movable wiring sheet (6) is integrally provided with a movable contact (7); a static wiring sheet (8) is fixed on the switch shell (3), a static contact (9) which is opposite to the movable contact (7) up and down is integrally arranged on the surface of the static wiring sheet (8) opposite to the movable wiring sheet (6), and the static wiring sheet (8) and the movable wiring sheet (6) are connected in series in the power supply circuit through the movable contact (7) and the static contact (9); a second shape memory alloy component (10) which is arranged on the same side as the movable contact (7) is arranged between the movable lug plate (6) and the inner wall of the switch shell (3) opposite to the movable lug plate.

2. A push button mobile jack with dual overload prevention capability as defined in claim 1 wherein: the first shape memory alloy part (2) and the second shape memory alloy part (10) are both made of nickel-titanium alloy, nickel-titanium-copper alloy or nickel-titanium-niobium alloy.

3. A push button mobile jack with dual overload prevention capability as defined in claim 2 wherein: the nickel-titanium alloy is composed of the following raw materials in percentage by mass: 43.93wt% -45.62wt% of titanium; 0.01wt% to 0.1wt% of unavoidable impurities; the balance being nickel.

4. A push button mobile jack with dual overload prevention capability as defined in claim 2 wherein: the nickel-titanium-copper alloy is composed of the following raw materials in percentage by mass: 43.93wt% -45.62wt% of titanium; 0.12wt% -34.88wt% of copper; 0.01wt% to 0.1wt% of unavoidable impurities; the balance being nickel.

5. A push button mobile jack with dual overload prevention capability as defined in claim 2 wherein: the nickel-titanium-niobium alloy is prepared from the following raw materials in percentage by mass: 43.93wt% -45.62wt% of titanium; 0.17wt% -30.95wt% of niobium; 0.01wt% to 0.1wt% of unavoidable impurities; the balance being nickel.

6. A push button mobile jack with dual overload prevention capability as defined in claim 1 wherein: the second shape memory alloy component (10) is spring-shaped.

7. A push button mobile jack with dual overload prevention capability as defined in claim 1 wherein: the number of the movable contacts (7) is one or two, and the fixed contacts (9) are in one-to-one contact with the movable contacts (7) along the vertical direction.

8. A push button mobile jack with dual overload prevention capability as defined in claim 1 wherein: the metal reed clip (1) is made of copper; the metal reed clamp (1) and the first shape memory alloy part (2) are fixedly connected through low-temperature brazing, adhesive bonding or riveting.

9. A push button mobile jack with dual overload prevention capability as defined in claim 6 wherein: the method for manufacturing the spring-shaped second shape memory alloy component (10) is realized by adopting the following steps:

s1: preparing coarse silk: firstly, preparing an alloy ingot by using a vacuum induction melting method, preserving heat for 0.5-3 h at 700-1000 ℃, then forging, preserving heat for 0.5-2 h at 700-1000 ℃ after forging, and then rolling into a thick wire with the diameter of 6-10 mm;

s2: the forming process of the shape memory alloy comprises the following steps: drawing the thick wire prepared in the step S1 into a thin wire with the diameter of 0.3mm-1.5mm, then winding the thin wire into a spring, heating the spring to 400-600 ℃, preserving heat for 5-60 sec under the temperature condition, and then taking out and rapidly cooling to fix the shape;

s3: shape memory training: and (4) heating the shape memory alloy forming part prepared in the step (S2) to 400-600 ℃, preserving the heat for 1-60 min under the temperature condition, then cooling in air, and cutting, thereby completing the preparation of the second shape memory alloy part (10) in the spring shape.

10. A push button mobile jack with dual overload prevention capability as defined in claim 1 wherein: the preparation method of the first shape memory alloy component (2) is realized by adopting the following steps:

s1: preparing coarse silk: firstly, preparing an alloy ingot by using a vacuum induction melting method, preserving heat for 0.5-3 h at 700-1000 ℃, then forging, preserving heat for 0.5-2 h at 700-1000 ℃ after forging, and then rolling into a thick wire with the diameter of 6-10 mm;

s2: the forming process of the shape memory alloy comprises the following steps: keeping the temperature of the thick wire prepared in the step S1 at 600-950 ℃ for 5-30 min, rolling the thick wire into a plate with the thickness of 0.2-2 mm, cutting the plate, fixing the plate on an omega-shaped die, keeping the temperature at 400-600 ℃ for 5-60 sec, taking out and quickly cooling to fix the shape;

s3: shape memory training: and (4) heating the shape memory alloy formed part prepared in the step S2 to 400-600 ℃, preserving heat for 1-60 min under the temperature condition, and then cooling in air, thereby completing the preparation of the first shape memory alloy part (2).

Technical Field

The invention belongs to the field of electrical elements, and particularly relates to a push-button type mobile socket with double overload prevention functions.

Background

With the increasing increase of household appliances, the current load of the household mobile socket is larger and larger. The electric fire can be caused by overlarge current, short circuit of electric wires, overheating of electric appliances and the like, and the overload-prevention mobile socket is widely used for avoiding the occurrence of the electric fire.

The overload protection function is realized through setting up overload protector mostly to current commercial overload prevention mobile socket, nevertheless when the circuit that takes place single jack transships, can't realize power-off protection, can't eliminate the risk that causes electric fire completely. Patent CN109524857A discloses an automatic power-off overheat-proof socket, which comprises a conductive column and an insulating layer, wherein when the socket generates heat seriously, mercury expands, so that the circuit is disconnected, and an overheat protection effect is achieved. However, the invention has a complex structure, uses mercury harmful to human body, and is not beneficial to popularization and use. Therefore, an overload prevention mobile socket which is fast in temperature response, high in temperature control precision, simple in structure and capable of protecting a single jack is needed to be designed, so that the problems that the existing overload prevention socket cannot protect the single jack, is complex in structure and is difficult to popularize are solved.

Disclosure of Invention

The invention provides a push-button type mobile socket with double overload prevention functions, which aims to solve the problems that the existing overload prevention mobile socket cannot protect a single jack and is complex in structure and difficult to popularize.

The invention is realized by adopting the following technical scheme:

a push-button type mobile socket with double overload prevention functions comprises a socket shell, a power supply circuit, a push-button switch and a plurality of metal reed clips; the power supply circuit and each metal reed clip are arranged inside the socket shell; the metal reed clip is in an omega shape, and one side of the arc part of the metal reed clip is fixedly connected with a first shape memory alloy part which is attached to the arc surface of the metal reed clip;

the button switch comprises a switch shell and an insulating button, the switch shell is arranged inside the socket shell, and the upper wall of the switch shell is connected with the upper wall of the socket shell into a whole; the upper part of the insulating button penetrates through the upper wall of the switch shell, and a return spring is vertically arranged between the upper part of the insulating button and the upper wall of the switch shell; the bottom of the insulating button is fixedly connected with a movable lug plate, and one surface of the movable lug plate is integrally provided with a movable contact; a static wiring sheet is fixed on the switch shell, a static contact which is opposite to the movable contact up and down is integrally arranged on the surface of the static wiring sheet opposite to the movable wiring sheet, and the static wiring sheet and the movable wiring sheet are connected in series in the power supply circuit through the movable contact and the static contact; a second shape memory alloy component arranged at the same side as the moving contact is arranged between the moving lug and the inner wall of the switch shell opposite to the moving lug.

The first shape memory alloy component and the second shape memory alloy component are made of nickel-titanium alloy, nickel-titanium-copper alloy or nickel-titanium-niobium alloy.

The nickel-titanium alloy is composed of the following raw materials in percentage by mass: 43.93wt% -45.62wt% of titanium; 0.01wt% to 0.1wt% of unavoidable impurities; the balance being nickel.

The nickel-titanium-copper alloy is composed of the following raw materials in percentage by mass: 43.93wt% -45.62wt% of titanium; 0.12wt% -34.88wt% of copper; 0.01wt% to 0.1wt% of unavoidable impurities; the balance being nickel.

The nickel-titanium-niobium alloy is prepared from the following raw materials in percentage by mass: 43.93wt% -45.62wt% of titanium; 0.17wt% -30.95wt% of niobium; 0.01wt% to 0.1wt% of unavoidable impurities; the balance being nickel.

The second shape memory alloy component is spring-shaped.

The number of the movable contacts is one or two, and the fixed contacts are in one-to-one corresponding contact with the movable contacts along the vertical direction.

The metal reed clip is made of copper; the metal reed clamp and the first shape memory alloy part are fixedly connected through low-temperature brazing, adhesive bonding or riveting.

The preparation method of the spring-shaped second shape memory alloy component is realized by adopting the following steps:

s1: preparing coarse silk: firstly, preparing an alloy ingot by using a vacuum induction melting method, preserving heat for 0.5-3 h at 700-1000 ℃, then forging, preserving heat for 0.5-2 h at 700-1000 ℃ after forging, and then rolling into a thick wire with the diameter of 6-10 mm;

s2: the forming process of the shape memory alloy comprises the following steps: drawing the thick wire prepared in the step S1 into a thin wire with the diameter of 0.3mm-1.5mm, then winding the thin wire into a spring, heating the spring to 400-600 ℃, preserving heat for 5-60 sec under the temperature condition, and then taking out and rapidly cooling to fix the shape;

s3: shape memory training: and (4) heating the shape memory alloy forming part prepared in the step (S2) to 400-600 ℃, preserving the heat for 1-60 min under the temperature condition, then cooling in air, and cutting, thereby completing the preparation of the second shape memory alloy part in the spring shape.

The preparation method of the first shape memory alloy component is realized by adopting the following steps:

s1: preparing coarse silk: firstly, preparing an alloy ingot by using a vacuum induction melting method, preserving heat for 0.5-3 h at 700-1000 ℃, then forging, preserving heat for 0.5-2 h at 700-1000 ℃ after forging, and then rolling into a thick wire with the diameter of 6-10 mm;

s2: the forming process of the shape memory alloy comprises the following steps: keeping the temperature of the thick wire prepared in the step S1 at 600-950 ℃ for 5-30 min, rolling the thick wire into a plate with the thickness of 0.2-2 mm, cutting the plate, fixing the plate on an omega-shaped die, keeping the temperature at 400-600 ℃ for 5-60 sec, taking out and quickly cooling to fix the shape;

s3: shape memory training: and (4) heating the shape memory alloy formed part prepared in the step S2 to 400-600 ℃, preserving heat for 1-60 min under the temperature condition, and then cooling in air, thereby completing the preparation of the first shape memory alloy part.

When a single electric appliance circuit on the mobile socket is overloaded to cause local lead overheating, the temperature of the metal reed clamp rises, the temperature of the first shape memory alloy component rises synchronously, the first shape memory alloy component is excited to be converted from a soft inelastic martensite phase to a superelastic austenite phase, and the preset shape is restored to change the radian of the first shape memory alloy component, so that the metal reed clamp is driven to deform, the purpose of separating the metal reed clamp from the plug is realized, and the power failure when the single electric appliance circuit is overloaded is realized. When the total power of the electric appliance on the mobile socket exceeds the load, the cost-causing mobile socket lead is overheated, the temperature of the inner cavity of the button switch rises along with the temperature rise of the second shape memory alloy part, the second shape memory alloy part is excited to be converted from a soft inelastic martensite phase into a superelastic austenite phase, the preset shape is restored to increase the height of the second shape memory alloy part, the distance between the movable lug and the static lug is increased, the static contact is driven to be separated from the movable contact, and therefore the power failure when the total power of the electric appliance exceeds the load, the cost-causing mobile socket lead is overheated is realized. When the circuit overload factor is eliminated, the temperature of the second shape memory alloy part in the button switch and the first shape memory alloy part on the metal reed clip is reduced to be lower than the phase transition temperature, the austenite phase with super elasticity and high strength is transformed into the soft martensite phase, and the mobile socket can restore the normal power supply.

The invention has reasonable and reliable structural design, realizes double overload protection of button switch power-off and jack power-off, has accurate temperature sensing of the shape memory alloy, quick action response, high reliability and high stability, can realize the function of power supply restoration after the temperature is reduced below the safe working temperature, and has the advantages of simple structure, sensitive response, high safety, low cost, wide application range and easy popularization.

Drawings

Fig. 1 is a schematic structural view of a single-contact normally-closed push-button switch in embodiment 3 of the present invention;

fig. 2 is a schematic structural view of a single-contact normally open push-button switch in embodiment 1 of the present invention;

fig. 3 is a schematic structural view of a dual-contact normally closed push-button switch in embodiment 2 of the present invention;

fig. 4 is a schematic structural view of a dual-contact normally open push-button switch according to embodiment 4 of the present invention;

FIG. 5 is a schematic view of the structure of a metal reed clip according to the present invention;

FIG. 6 is a reference diagram showing the state of a push button switch when a single electric appliance circuit is overloaded according to embodiment 1 of the present invention;

fig. 7 is a reference diagram of a state in which a metal reed clip is automatically opened when a single electric appliance circuit is overloaded according to embodiment 1 of the present invention;

fig. 8 is a reference diagram of the state in which the push-button switch is automatically turned off when the total power of the electric appliance exceeds the load in embodiment 2 of the present invention.

In the figure, 1-metal reed clip, 2-first shape memory alloy component, 3-switch shell, 4-insulating button, 5-reset spring, 6-moving lug, 7-moving contact, 8-static lug, 9-static contact, 10-second shape memory alloy component.

Detailed Description