TWI697928B - Method for interrupting power supply to overheated power switch - Google Patents

Abstract

A method for interrupting power supply to an overheated power switch includes exerting a first elastic force upon a thermal breaker and a movable electrically conductive element at the same time in a direction such that the movable electrically conductive element becomes in contact with a first electrically conductive element and a second electrically conductive element to form an on-state current passage; and exerting a second elastic force upon the movable electrically conductive element in a direction such that the movable electrically conductive element recedes from at least one of the first electrically conductive element and the second electrically conductive element. The thermal breaker is disposed in a nonessential path and in a position relatively distant from the movable electrically conductive element. When the thermal breaker is destroyed or deformed at a specific temperature, the first elastic force diminishes or disappears, and the second elastic force compels the movable electrically conductive element to displace, thereby enabling interruption of the current passage.

Description

Switch's overheating destructive power-off method

The present invention relates to an overheating destructive power-off method for switches, in particular to a de-energizing method that is different from fuses and bimetallic strips. The overheating destructive element of the present invention is arranged on a path that is not necessary for current transmission. Relying on the passage of electric current to perform the destruction, and the transfer of heat energy to perform the destruction and turn off the switch.

The conventional rocker switch is to control the switch to pivot in a certain angle range to control the passage and disconnection of the switch. For example, the Republic of China Patent No. 560690 "Spark Shielding Structure for Toggle Switches" is used when the switch is pivoted. The positioning feature locates it in a first position or a second position to form a passage or disconnection.

The conventional push switch can repeatedly control the circuit and disconnection of the switch each time it is pressed. The button uses a reciprocating button structure similar to the conventional automatic ball pen, so that the button of the switch is positioned at the lower position or each time it is pressed. The upper position, such as that disclosed in Chinese Patent No. CN103441019 "Button Switch".

The Republic of China Patent No. 321352 "Online Switch Structure Improvement" discloses a switch structure with a fuse, but the fuse is located in the "necessary path for current transmission". The fuse needs to rely on the passage of current to have a protective effect, especially for overload currents. There is a chance to blow the fuse. Since the fuse needs to allow current to pass when it is working, but it must be blown when the current is too large. Therefore, low melting point lead-tin alloy and zinc are often used as fuses. The resistance of the fuse is relatively large, and the conductivity is far less than that of copper. The fuse is located in the necessary path for current transmission, so there will be a problem of energy consumption.

The Republic of China Patent No. M382568 "Bipolar Automatic Power-off Safety Switch" discloses a bimetallic type overload protection switch, but the bimetallic plate must also be located in the "necessary path for current transmission" and rely on current to pass. The heat energy of the heat energy can produce deformation, especially the overload current is required to deform the bimetal strip and interrupt the circuit, so there is also the problem of energy consumption.

However, in addition to the overheating caused by current overload, take the extension cord socket as an example, the following conditions may cause any socket to overheat, including:

1. The metal pins of the plug are severely oxidized, and the metal pins are covered with oxide. When the plug is inserted into the socket, the oxide with poor conductivity will increase the resistance and the socket will overheat.

2. When the metal pin of the plug is inserted into the socket, the insertion is not complete, resulting in only partial contact, and too small contact area causes the socket to overheat.

3. The metal pins of the plug are deformed or worn, resulting in incomplete contact when inserted into the socket, and too small contact area can cause the socket to overheat.

4. The metal pins of the plug or the metal piece of the socket are stained with foreign matter, such as dust or dirt, which makes the conductivity poor, so the resistance becomes large and overheated.

Under the above conditions, there will be a serious difference between the working temperature of the socket and the working temperature of the overload protection switch.

In the case of US Patent Application No. US9698542 "Assembly and method of plural conductive slots sharing an overheating destructive fixing element", the inventor disclosed an experiment on the difference between the distance and the temperature of the copper sheet. The test of the US9698542 patent case TABLE 2 shows that if The above overheated socket is located at position 10 of the TABLE 2 experiment, and the above overload protection switch is located at position 1 of the TABLE 2 experiment. The distance between the two is 9 cm. When the working temperature of the socket reaches 202.9°C, after 25 minutes, the overload protection switch will work The temperature is only 110.7°C. That is, when the socket is 9 cm away from the overload protection switch, when the socket's working temperature has overheated up to 202.9°C and there is a possibility of accidental burning, the bimetallic sheet of the overload protection switch is still only 110.7°C, which has not reached the deformation temperature. The overload protection switch will not automatically trip and power off.

Since there are many kinds of socket overheating situations, and the distance between the socket and the bimetal of the overload protection switch will cause a great temperature difference, in order to effectively achieve overheat protection, overload protection should be set on each socket of the extension cord socket. Switch, but the bimetallic type overload protection not only has the disadvantage of energy consumption, but also the price is relatively expensive. If it is installed on each socket of the extension cord socket, there will be a serious energy consumption problem. It will also rise sharply, which is not conducive to universal use.

Based on the above-mentioned reasons, in order to overcome this shortcoming, the present invention proposes an overheating destructive power-off method for a switch, which includes the following steps:

A first elastic force of a first elastic member is simultaneously applied to an overheating destruction member and a movable conductive member through an operating member, and the direction of application of the first elastic force is such that the movable conductive member can simultaneously contact a first conductive member A conductive element and a second conductive element to form a current path; the second elastic force of a second elastic element acts on the movable conductive element through the operating element, and the direction of application of the second elastic force is such that The movable conductive member is far away from the first conductive member or the second conductive member; when the movable conductive member is in contact with the first conductive member and the second conductive member at the same time, the overheating damage member is arranged on a non-current transmission necessary path , And the overheat breaking element is arranged at a position far away from the movable conductive element, and on the non-current transmission path, the overheat breaking element can receive the thermal energy of the current path; make a thermal energy of the current path conduct sequentially through the movable The first elastic element is transferred to the overheated destruction element; when the overheated destruction element receives the thermal energy and heats up close to a breaking temperature, the overheated destruction element is destroyed by the application of the first elastic force Or deform, the first elastic member deforms accordingly, so that the force of the first elastic force acting on the movable conductive member is reduced or lost, and the second elastic force forces the movable conductive member to change position, causing the movable The conductive element no longer conducts the first conductive element and the second conductive element at the same time to interrupt the current path.

Furthermore, the destruction temperature of the overheated destruction piece is between 100°C and 400°C.

Further, the overheating destruction piece is made of plastic materials, including thermoplastic plastics and thermosetting plastics; or, the overheating destruction piece is made of metal or alloy, and the main components of the alloy include bismuth, cadmium, tin, lead, dysprosium, and indium. Any two or more of them, for example, the alloy is a tin-bismuth alloy, or one or a combination of the following metals are added to tin and bismuth: cadmium, indium, silver, tin, lead, antimony, and copper.

According to the above technical features, the following effects can be achieved:

1. The overheating damage is located on the "non-necessary path of current transmission". The overheating damage is not a necessary element for transmitting current. Even if the conductivity of the overheating damage of the present invention is not as good as that of copper, the current will choose the "necessary path for current transmission" with the smallest resistance. Therefore, the present invention can effectively avoid energy consumption by arranging the overheating destruction component on the "non-necessary path of current transmission".

2. The method of the present invention is easy to apply to existing switches without increasing the volume of the switch, and is applied to known rocker switches, push switches, etc., and the increased cost is very limited and easy to implement.

3. Because of its small size and low cost, it can be applied to existing electrical appliances. For example, when applied to extension cords, if each socket of the extension cord is equipped with a thermally destructive power-off switch of the present invention, it can ensure the corresponding For the safety of each set of socket holes of each switch in use. It can also improve the shortcomings of the conventional double metal sheet that consumes energy, is expensive, and must share an overload protection switch for multiple sets of socket holes. And there will be no such phenomenon that the socket hole far away from the overload protection switch has overheated and caused the temperature to rise, and the overload protection switch has not tripped because it has not reached the trip temperature.

The technical terms of the present invention are defined as follows: "The necessary path for current transmission" refers to the necessary path for transmitting current. Any element in the necessary path for current transmission must be a conductor. When any element of the necessary path for current transmission is destroyed, The current cannot continue to pass. For example, when the fuse is set in the current path, the fuse is an element in the necessary path for current transmission. "Non-necessary path for current transmission" refers to a path that is not necessary for current transmission. Components that are not necessary for current transmission can be conductors or insulators.

In each embodiment of the present invention, the first silver contact and the second silver contact are set to improve the efficiency of current conduction between the rocker conductive member and the second conductive member, but if the first silver contact is not provided The point and the second silver contact point directly make the rocker conductive element contact the second conductive element, which is also a feasible way, that is, the first silver contact point and the second silver contact point are not necessary components. In the following description, when the rocker conductive member is in contact with or separated from the second conductive member, both implicitly indicate that the first silver contact is in contact with or separated from the second silver contact.

In the following description, the "destruction" of the overheated destruction part or the part to be destroyed includes the methods of loss of rigidity, softening, deformation, melting, gasification, cracking, decomposition, and coking.

Please refer to the first figure for the first embodiment of the present invention. In this embodiment, an overheat destructive switch is used to illustrate the overheat destructive power-off method of the present invention, and in this embodiment, it is a rocker switch. A picture shows the rocker switch is closed. The rocker switch includes:

The base (1A) has a containing space (11A). A first conductive member (2A) and a second conductive member (3A) are both inserted into the base (1A). A movable conductive element is arranged in the containing space (11A), the movable conductive element is a rocker conductive element (4A), and the rocker conductive element (4A) straddles the first conductive element (2A) to electrically The first conductive member (2A) is sexually connected. When the working temperature rises abnormally, it is best to produce an open circuit in the live wire, so the first conductive member (2A) is used as the first end of the live wire, and the second conductive member (3A) is used as the second end of the live wire, and The rocker conductive member (4A) conducts the first conductive member (2A) and the second conductive member (3A) to form a live wire path. The rocker conductive member (4A) is provided with a first silver contact (41A), the second conductive member (3A) is correspondingly provided with a second silver contact (31A), the rocker conductive member (4A) and the second The conductive elements (3A) are connected by the contact between the first silver contact (41A) and the second silver contact (31A). Preferably, the material of the first conductive member (2A), the second conductive member (3A) and the rocker conductive member (4A) are all copper, and the first silver contact (41A) is connected to the second silver contact The material of point (31A) is silver. When the rocker switch is switched to the open position, the first conductive member (2A), the rocker conductive member (4A), the first silver contact (41A), the second silver contact (31A) and the second The conductive parts (3A) together form the "necessary path for current transmission".

An overheated destruction piece (5A) can be destroyed at a destruction temperature, the destruction temperature is between 100°C and 400°C, and the overheated destruction piece (5A) is located in a "non-necessary path for current transmission", so insulating materials can be selected For example, plastics, including thermoplastics and thermosetting plastics, or non-insulating materials, including metals or alloys, such as alloys containing any two or more of bismuth, cadmium, tin, lead, dysprosium, and indium, wherein the melting point of tin-bismuth alloy is about At 138°C, it is a good material for detecting circuit overheating. In this embodiment, the overheating destruction component (5A) includes a connecting portion (51A), a portion to be destroyed (52A), and a supporting portion (53A), and further includes a set portion (54A). The supporting portion (53A) connects the connecting portion (51A) and the portion to be broken (52A), and the supporting portion (53A) defines a displacement space (531A) on the outer periphery of the supporting portion (53A), such as the diameter and width of the supporting portion (53A) The displacement space (531A) is formed relatively smaller than the connecting portion (51A). The to-be-destructed portion (52A) is arranged on the outer edge of the supporting portion (53A) and is not in the displacement space (531A). The displacement space (531A) ) Is a space reserved for the to-be-destructed part (52A), so that after the to-be-destructed part (52A) is destroyed, there can be moving space, and the sleeve part (54A) is connected to the to-be-destructed part (52A) ).

An operating assembly (6A) for operating the rocker conductive member (4A) to connect the first conductive member (2A) and the second conductive member (3A) to form a live wire path, or to disconnect the first conductive member ( 2A) The path with the second conductive member (3A) makes the live wire open. The operating assembly (6A) is assembled on the base (1A) and includes an operating member (61A) and a first elastic member (62A). The operating member (61A) is provided with a pivot point (610A), and the pivot The contact (610A) is pivotally connected to the base (1A), so that the operating member (61A) can reciprocate to a limited extent with the pivotal contact (610A) as the axis. The operating member (61A) also includes A restricting piece and a contact piece (612A). The restricting piece is an accommodating pipe portion (611A), and the overheating destruction piece (5A) is placed in the accommodating pipe portion (611A). The first elastic member (62A) is also inserted into the accommodating tube portion (611A), so that one end (621A) of the first elastic member (62A) is sleeved on the sleeve portion (54A) of the overheating destruction member (5A) ), and abut the part to be destroyed (52A). The contact piece (612A) is a heat-conducting shell and is installed in the containing tube portion (611A) and contacts the rocker conductive piece (4A), and the other end (622A) of the first elastic piece (62A) abuts against the contact On the member (612A), the overheating destruction member (5A) is arranged at a position away from the rocker conductive member (4A), and the first elastic member (62A) is compressed and constrained between the contact member (612A) and the overheating There is a first elastic force between the breaking pieces (5A). The contact piece (612A), the first elastic piece (62A), and the overheating damage piece (5A) are all located in "non-necessary paths for current transmission."

A second elastic element (7A), the second elastic element (7A) in this embodiment is a spring, the second elastic element (7A) has a second elastic force, the second elastic force acts on the operating element (61A). For example, the operating member (61A) is provided with a first protrusion (63A) at a position deviating from the pivot point (610A), and the seat body (1A) has a second protrusion (10A) corresponding to the first protrusion (63A). ), the two ends of the second elastic member (7A) are respectively sleeved on the first convex portion (63A) and the second convex portion (10A).

As shown in the second figure, the user rotates the operating member (61A) around the pivot point (610A) to make the contact member (612A) slide on the rocker conductive member (4A), The rocker conductive member (4A) is driven to selectively contact or be separated from the second conductive member (3A) in a rocker motion pattern. When the contact (612A) slides on the rocker conductive member (4A) toward the first silver contact (41A) on the rocker conductive member (4A), the first elastic force will force the The first silver contact (41A) contacts the second silver contact (31A), so that the first conductive member (2A), the rocker conductive member (4A) and the second conductive member (3A) are in an energized state .

As shown in the third figure, when the external conductive device connected to the first conductive member (2A) or the second conductive member (3A) has an abnormal state, for example, the external conductive device is a socket, when the metal pin of the plug and the socket The presence of oxides, dust, incomplete insertion of metal pins, deformation of metal pins and other phenomena will cause the conductive parts of the socket to generate large heat energy, which is passed through the first conductive member (2A) or the second conductive member (3A) To the rocker conductive part (4A), and then to the overheating destruction part (5A) via the contact part (612A) and the first elastic part (62A) in sequence, and the overheating destruction part (5A) is to be destroyed The part (52A) absorbs the heat energy and gradually reaches the destruction temperature. At this time, the part (52A) of the overheated destruction piece (5A) will be "destructed" and begin to gradually lose rigidity, such as the material of the overheated destruction piece (5A) It is a tin-bismuth alloy. Although its melting point is 138°C, it starts to lose rigidity when it is close to the melting point. At the same time, under the action of the first elastic force, the part (52A) of the overheating destruction piece (5A) is affected by the first An elastic member (62A) is pressed and gradually displaced in the direction of the displacement space (531A), causing the first elastic force to decrease or lose. At this time, the second elastic force is greater than the first elastic force. In this embodiment, the arrangement direction of the first conductive member (2A) and the second conductive member (3A) is defined as a longitudinal direction, the operating member (61A) has a length in the longitudinal direction, and the first elastic member ( 62A) is arranged at a central position of the length, and the arrangement position of the second elastic member (7A) at the length is at a distance from the central position. Therefore, when the second elastic force is greater than the first elastic force, the operating member (61A) can rotate on the pivot point (610A) as the axis due to the action of torque, and drive the contact member (612A) in the warping position. The plate conductive member (4A) slides upward, thereby forcing the operating member (61A) to move to the closed position, and the first silver contact (41A) of the rocker conductive member (4A) is separated from the second silver contact (31A) ), that is, the rocker conductive member (4A) is separated from the second conductive member (3A) to form a power-off state, thereby achieving the function of overheating protection.

Please refer to the second figure, when the rocker conductive member (4A) is connected to the first conductive member (2A) and the second conductive member (3A), the rocker conductive member (4A), the first conductive member ( 2A) and the second conductive element (3A) are all located in the "necessary path for current transmission", and the three materials are all copper, and the resistance is small. However, the contact element (612A), the first elastic element (62A) and the overheating destruction element (5A) are all located in the "non-current transmission path", and at least the first elastic element (62A) and the overheating destruction element The material of (5A) is not copper, and the resistance of the first elastic member (62A) and the overheating destruction member (5A) is larger than that of copper. Since the current will flow to the path with the least resistance, when the rocker switch is in the state shown in the second figure, the current will follow the first conductive member (2A), the rocker conductive member (4A), and the The path of the second conductive member (3A) passes. Because the overheat breaking element (5A) and the first elastic element (62A) of the present invention are both located in the "non-current transmission path", the material of the overheat breaking element (5A) and the first elastic element (62A) even if the resistance is large , It will not cause energy consumption, so the power-off method of the present invention is completely different from the power-off method of the traditional fuse, and also completely different from the power-off method of the bimetal structure of the overload switch.

Please refer to Figure 4 for the second embodiment of the present invention. This embodiment also uses an overheating destructive switch to illustrate the overheating destructive power-off method of the present invention. This embodiment is also a rocker switch, and the fourth figure The rocker switch is in a closed state. The rocker switch includes:

The base (1B) has an accommodation space (11B). A first conductive member (2B) and a second conductive member (3B) are both inserted into the base (1B). A movable conductive element is arranged in the containing space (11B), the movable conductive element is a rocker conductive element (4B), and the rocker conductive element (4B) straddles the first conductive element (2B) to electrically The first conductive member (2B) is sexually connected. When the working temperature rises abnormally, it is better to produce an open circuit in the live wire, so the first conductive member (2B) is used as the first end of the live wire, and the second conductive member (3B) is used as the second end of the live wire, and The rocker conductive member (4B) conducts the first conductive member (2B) and the second conductive member (3B) to form a live wire path. The rocker conductive member (4B) is provided with a first silver contact (41B), the second conductive member (3B) is correspondingly provided with a second silver contact (31B), the rocker conductive member (4B) and the second The conductive elements (3B) are connected through the contact between the first silver contact (41B) and the second silver contact (31B). When the rocker switch is switched to the open position, the first conductive member (2B), the rocker conductive member (4B), the first silver contact (41B), the second silver contact (31B) and the second The conductive parts (3B) together form a "necessary path for current transmission".

An overheated destruction piece (5B) can be destroyed at a destruction temperature, which is between 100°C and 400°C. The overheated destruction piece (5B) is located in a "non-necessary path for current transmission", so insulating materials can be selected For example, plastics, including thermoplastics and thermosetting plastics, or metals or alloys of non-insulating materials, such as alloys containing any two or more of bismuth, cadmium, tin, lead, dysprosium, and indium. The melting point of tin-bismuth alloy is about 138℃ is a good material for detecting circuit overheating. In this embodiment, the overheating destruction component (5B) includes a connecting portion (51B), a portion to be destroyed (52B), and a supporting portion (53B), and further includes a set portion (54B), the supporting portion (53B) ) Connects the connecting portion (51B) and the portion to be destroyed (52B), the support portion (53B) defines a displacement space (531B) on the axial periphery, for example, the support portion (53B) is relatively smaller in diameter and width than the connecting portion ( 51B) to form the displacement space (531B), the portion to be destroyed (52B) is arranged on the outer edge of the support portion (53B) and is not in the displacement space (531B), and the displacement space (531B) is for the to be destroyed A space reserved for the part (52B) so that the part (52B) to be destroyed can have a moving space after being destroyed, and the sleeve part (54B) is connected to the part (52B) to be destroyed.

An operating component (6B) for operating the rocker conductive member (4B) to connect the first conductive member (2B) and the second conductive member (3B) to form a live wire path, or to disconnect the first conductive member ( 2B) The path with the second conductive member (3B) makes the live wire open. The operating assembly (6B) is assembled on the base (1B) and includes an operating member (61B) and a first elastic member (62B). The operating member (61B) is provided with a pivot point (610B), and the pivot The contact point (610B) is pivotally connected to the base (1B), so that the operating member (61B) can reciprocate to a limited extent with the pivot point (610B) as the axis. The operating member (61B) also includes a A contact piece (612B) and a restricting piece. The contact piece (612B) is a hollow-shaped heat-conducting shell piece, the heat-conducting shell piece contacts the rocker conductive piece (4B), and the restricting piece is a housing tube part ( 611B), and the first elastic member (62B) includes a first spring (621B) and a second spring (622B), the first spring (621B), the second spring (622B), and the overheating destruction member ( 5B) is installed in the accommodating tube portion (611B), wherein the second spring (622B) abuts against the contact piece (612B), and the overheating breaking piece (5B) is arranged on the first spring (621B) And the second spring (622B), so the overheating breaking element (5B) passes through the first spring (621B) and is disposed at a position away from the rocker conductive element (4B), the first spring (621B) The second spring (622B) and the second spring (622B) are compressed to each have an elastic force. The sum of the elastic forces of the first spring (621B) and the second spring (622B) is a first elastic force.

A second elastic element (7B), the second elastic element (7B) in this embodiment is a spring, the second elastic element (7B) has a second elastic force, the second elastic force acts on the operating element (61B).

Referring to the fifth figure, the user operates the operating member (61B) to rotate around the pivot point (610B) to make the contact member (612B) slide on the rocker conductive member (4B), The rocker conductive member (4B) is driven to selectively contact or be separated from the second conductive member (3B) in a rocker motion pattern. When the contact (612B) slides on the rocker conductive member (4B) toward a first silver contact (41B) on the rocker conductive member (4B), the first elastic force Will force the first silver contact (41B) to contact the second silver contact (31B) on the second conductive member (3B), so that the first conductive member (2B), the rocker conductive member (4B) and The three second conductive members (3B) form current paths.

Refer to Figure 6, when the external conductive device connected to the first conductive member (2B) or the second conductive member (3B) has an abnormal state, for example, the external conductive device is a socket, when the metal pin of the plug is The presence of oxides, dust, incomplete insertion of metal pins, and deformation of metal pins between the sockets will cause the conductive parts of the socket to generate greater heat energy, which will pass through the first conductive member (2B) or the second conductive member ( 3B) is transferred to the rocker conductive element (4B), and then sequentially transferred to the overheating failure element (5B) via the contact element (612B) and the second spring (622B), and the overheating failure element (5B) is waiting The breaking part (52B) absorbs the heat energy and gradually reaches its breaking temperature. At this time, the part to be broken (52B) of the overheated breaking piece (5B) will be "destroyed" and begin to gradually lose rigidity, such as the overheated breaking piece (5B) The material is tin-bismuth alloy. Although its melting point is 138°C, it starts to lose rigidity when it is close to the melting point. At the same time, under the action of the first elastic force, the overheated destruction part (5B) of the to-be-destructed part (52B) It is pressed by the first spring (621B) and the second spring (622B) and gradually displaces in the direction of the displacement space (531B), causing the first elastic force to decrease or lose, and the second elastic force will Greater than the first elastic force. In this embodiment, the arrangement direction of the first conductive member (2B) and the second conductive member (3B) is defined as a longitudinal direction, the operating member (61B) has a length in the longitudinal direction, and the first elastic member ( 62B) is arranged at a central position of the length, and the arrangement position of the second elastic element (7B) is at a distance from the central position. Therefore, when the second elastic force is greater than the first elastic force, the operating element (61B) Because of the action of the moment, the pivot point (610B) can be rotated as the axis, and the contact piece (612B) is driven to slide on the rocker conductive piece (4B) to force the operating piece (61B) to close Therefore, the silver contact (41B) of the rocker conductive member (4B) is separated from the second conductive member (3B) to form a power-off state, thereby achieving the function of overheating protection.

Please refer to the fifth figure, when the rocker conductive member (4B) is connected to the first conductive member (2B) and the second conductive member (3B), the rocker conductive member (4B), the first conductive member ( 2B) and the second conductive member (3B) are all located in the "necessary path for current transmission", and the three materials are all copper, and the resistance is small. However, the contact piece (612B), the second spring (622B), and the overheating damage component (5B) are all located in the "non-current transmission path", and at least the second spring (622B) and the overheating damage component (5B) The material of) is not copper, and the resistance of the second spring (622B) and the overheating damage component (5B) is larger than that of copper. Since the current will flow to the path of least resistance, when the rocker switch is in the state shown in the fifth figure, the current will follow the first conductive member (2B), the rocker conductive member (4B), and the second conductive member with the smallest resistance. The path of the piece (3B) is passed. Because the overheat breaking element (5B) and the second spring (622B) of the present invention are both located in the "non-current transmission path", the material of the overheat breaking element (5B) and the second spring (622B) even if the resistance is large It does not cause energy consumption, so the power-off method of the present invention is completely different from the power-off method of the traditional fuse, and is also completely different from the power-off method of the bimetal structure of the overload switch.

For the third embodiment of the present invention, please refer to the seventh figure. This embodiment also uses an overheat destructive switch to illustrate the overheat destructive power-off method of the present invention. This embodiment is a push switch, and the seventh figure shows The push switch is in the off state. The push switch includes:

The base (1C) has an accommodation space (11C) and a protruding part (12C). A first conductive element (2C) and a second conductive element (3C) are both inserted into the base (1C). A movable conductive element is arranged in the containing space (11C), and the movable conductive element is a cantilever conductive element (4C). When the working temperature rises abnormally, it is best to produce an open circuit in the live wire, so the first conductive member (2C) is used as the first end of the live wire, and the second conductive member (3C) is used as the second end of the live wire, and The cantilever conductive member (4C) conducts the first conductive member (2C) and the second conductive member (3C) to form a live wire path. The cantilever conductive member (4C) is provided with a first silver contact (41C), the second conductive member (3C) is correspondingly provided with a second silver contact (31C), the cantilever conductive member (4C) and the second conductive member Between (3C), conduction is achieved by the contact between the first silver contact (41C) and the second silver contact (31C). When the press switch is switched to the open position, the first conductive member (2C), the cantilever conductive member (4C), the first silver contact (41C), the second silver contact (31C) and the second conductive The parts (3C) together form the "necessary path for current transmission".

An overheated destruction piece (5C) can be destroyed at a destruction temperature, the destruction temperature is between 100°C to 400°C, and the overheated destruction piece (5C) is located in a "non-necessary path for current transmission", so insulating materials can be selected For example, plastics, including thermoplastics and thermosetting plastics, or metals or alloys of non-insulating materials, such as alloys containing any two or more of bismuth, cadmium, tin, lead, dysprosium, and indium. The melting point of tin-bismuth alloy is about 138℃ is a good material for detecting circuit overheating. The shape of the overheating destruction element (5C) is the same as the first embodiment and the second embodiment described above.

The push switch of this embodiment further has an operating component (6C) for operating the cantilever conductive member (4C) to connect the first conductive member (2C) and the second conductive member (3C) to form a live wire path, or The path between the first conductive member (2C) and the second conductive member (3C) is disconnected, so that the live wire forms an open circuit. The operating component (6C) is assembled on the base (1C). The operating component (6C) includes an operating element (61C) and a first elastic element (62C). The operating element (61C) is sleeved on the convex The exit portion (12C), the operating member (61C) can reciprocate to a limited extent on the protruding portion (12C). The reciprocating movement and positioning structure of the entire operating assembly (6C) is the same as the conventional automatic ballpoint pen pressing button structure or the Chinese patent No. CN103441019 "button switch" structure. Therefore, some conventional positioning is omitted from the drawing of this embodiment The structure is not drawn. The operating member (61C) also includes a containing tube portion (611C), a contact member (612C) and a restricting member (613C). An assembly position (6111C) is provided at one end of the receiving tube portion (611C) away from the cantilever conductive member (4C), and the receiving tube portion (611C) has an opening (6112C) at one end adjacent to the cantilever conductive member (4C), The accommodating tube portion (611C) is provided with a through hole (6113C) at one end away from the cantilever conductive member (4C), and the overheating destruction member (5C) is inserted into the accommodating tube portion (611C) through the opening (6112C) , So that the overheating destruction component (5C) is located at the assembly position (6111C). The restricting member (613C) is, for example, a cylinder and defines a space (6131C). By the restricting member (613C) against the overheating destruction member (5C), the overheating destruction member (5C) is located in the accommodating tube portion (611C) Assembly position (6111C). The first elastic element (62C) is inserted into the space (6131C) so that the first end (621C) of the first elastic element (62C) abuts against the overheating destruction element (5C). The contact piece (612C) includes a limit post (6121C) and a support seat (6122C). The limit post (6121C) extends into the second end (622C) of the first elastic component (62C), so that the An elastic member (62B) abuts on the support base (6122C), and the support base (6122C) contacts the cantilever conductive member (4C). The overheat breaking element (5C) abuts against the restricting element (613C), and the first elastic element (62C) is compressed and restricted between the contact element (612C) and the overheat breaking element (5C) to have a first Elasticity.

The push switch of this embodiment further has a second elastic member, the second elastic member is a reed (7C), and the first conductive member (2C), the reed (7C) and the cantilever conductive member ( 4C) The three are integrally formed, the reed (7C) has a second elastic force, and the second elastic force acts on the cantilever conductive element (4C).

Referring to the eighth figure, the user manipulates the operating member (61C) to move relative to the protruding portion (12C), just like the button of an automatic ballpoint pen, so that the cantilever conductive member (4C) selectively touches or Separated from the second conductive member (3C). When the operating member (61C) is displaced and positioned toward the cantilever conductive member (4C), the support seat (6122C) of the contact member (612C) will press the cantilever conductive member (4C) to make the first silver contact (41C) Contact the second silver contact (31C), that is, the cantilever conductive member (4C) contacts the second conductive member (3C) to form an energized state, and at the same time, the first elastic member (62C) will be further compressed, and When the first elastic force is greater, the first elastic force is greater than the second elastic force.

As shown in Figure 9, when the external conductive device connected to the first conductive member (2C) or the second conductive member (3C) has an abnormal state, for example, the external conductive device is a socket, when the metal pin of the plug and the socket The presence of oxides, dust, incomplete insertion of metal pins, deformation of metal pins, etc. will cause the conductive parts of the socket to generate greater heat energy, which is transferred through the first conductive member (2C) or the second conductive member (3C) To the cantilever conductive member (4C), and then sequentially pass through the contact member (612C) and the first elastic member (62C) to the overheat breaking element (5C). The overheat breaking element (5C) absorbs the heat energy and gradually When it reaches its breaking temperature, the overheated damage piece (5C) will gradually lose its rigidity. For example, the material of the overheated damage piece (5C) is tin-bismuth alloy. Although its melting point is 138°C, it starts to lose its rigidity when it approaches the melting point. At the same time, under the action of the first elastic force, the overheating destruction member (5C) is deformed or even destroyed by the pressure of the first elastic member (62C), and the first elastic member (62C) can no longer be restricted, resulting in the first elastic member (62C). An elastic force is therefore reduced or lost. At this time, the second elastic force will be greater than the first elastic force, thus forcing the cantilever conductive element (4C) to reset, so that the first silver contact (4C) of the cantilever conductive element (4C) is reset. 41C) is separated from the second silver contact (31C) of the second conductive member (3C) to form a power-off state, thereby achieving the function of overheating protection.

Please refer to the eighth figure, when the cantilever conductive member (4C) is connected to the first conductive member (2C) and the second conductive member (3C), the cantilever conductive member (4C) and the first conductive member (2C) The third conductive element (3C) and the second conductive element (3C) are all located in the "necessary path for current transmission", and the three materials are all copper, and the resistance is small. However, the contact piece (612C), the first elastic piece (62C), and the overheating destruction piece (5C) are all located in the "non-current transmission path", and at least the first elastic piece (62C) and the overheating destruction piece The material of (5C) is not copper, and the resistance of the first elastic member (62C) and the overheating damage member (5C) is larger than that of copper. Since the current will flow to the path with the least resistance, when the push switch is in the state shown in Figure 8, the current will follow the first conductive member (2C), the cantilever conductive member (4C), and the second conductive member with the least resistance (3C) path transmission. Because the overheat breaking element (5C) and the first elastic element (62C) of the present invention are both located in the "non-necessary path for current transmission", the material of the overheat breaking element (5C) and the first elastic element (62C) even if the resistance is large , It will not cause energy consumption, so the power-off method of the present invention is completely different from the power-off method of the traditional fuse, and also completely different from the power-off method of the bimetal structure of the overload switch.

Based on the description of the above-mentioned embodiments, when one can fully understand the operation and use of the present invention and the effects of the present invention, the above-mentioned embodiments are only preferred embodiments of the present invention, and the implementation of the present invention cannot be limited by this. The scope, that is, simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the description of the invention, are all within the scope of the present invention.

(1A): Seat (11A): accommodation space (2A): the first conductive part (3A): the second conductive part (31A): The second silver contact (4A): Seesaw conductive part (41A): First silver contact (5A): Overheating damage (51A): connecting part (52A): part to be destroyed (53A): support part (531A): Displacement space (54A): Fitting part (6A): Operating component (610A): pivot point (61A): Operating element (611A): Containing tube (612A): Contact (62A): First elastic part (621A): one end (622A): the other end (63A): the first convex part (7A): the second elastic part (10A): The second convex part (1B): Seat (11B): accommodation space (2B): the first conductive part (3B): the second conductive part (31B): The second silver contact (4B): Seesaw conductive part (41B): First silver contact (5B): Overheating damage (51B): connecting part (52B): part to be destroyed (53B): support part (531B): Displacement space (54B): Fitting part (6B): Operating components (61B): Operating parts (610B): pivot point (611B): housing tube (612B): Contact (62B): First elastic part (621B): First spring (622B): Second spring (7B): second elastic part (1C): Seat (11C): accommodation space (12C): Protruding part (2C): First conductive part (3C): Second conductive member (31C): Second silver contact (4C): Cantilever conductive element (41C): First silver contact (5C): Overheating destruction parts (6C): Operating components (61C): Operating element (611C): Containing tube (6111C): Assembly position (6112C): Open (6113C): Through hole (612C): Contact (6121C): Limit column (6122C): Support seat (613C): Restriction (6131C): Space (62C): First elastic member (621C): First end (622C): second end (7C): reed

[The first figure] is a schematic diagram of the first embodiment of the present invention, showing a rocker switch structure and the rocker switch in a closed position.

[The second figure] is a schematic diagram of the first embodiment of the present invention, showing that the rocker switch is in the open position.

[Third Figure] is a schematic diagram of the first embodiment of the present invention, showing that when the overheating destruction component is damaged by overheating, the movable conductive component is separated from the second conductive component, causing the rocker switch to return to the closed position from the open position It forms a disconnection.

[Fourth Figure] is a schematic diagram of the second embodiment of the present invention, showing another rocker switch structure and the other rocker switch in a closed position.

[Fifth Figure] is a schematic diagram of the second embodiment of the present invention, showing that the other rocker switch is in the open position.

[Figure 6] is a schematic diagram of the second embodiment of the present invention, showing that when the overheating destruction member is destroyed by overheating, the movable conductive member is separated from the second conductive member, causing the other rocker switch to return from the open position Close the position.

[The seventh figure] is a schematic diagram of the third embodiment of the present invention, showing the structure of a push switch and the push switch in the closed position.

[Figure 8] is a schematic diagram of the third embodiment of the present invention, showing that the push switch is in the open position.

[Figure 9] is a schematic diagram of the third embodiment of the present invention, which shows that when the overheating destruction member is damaged by overheating, the movable conductive member is separated from the second conductive member, causing the press switch to return to the closed position from the open position .

(1A): Seat

(11A): accommodation space

(2A): The first conductive part

(3A): The second conductive part

(31A): The second silver contact

(4A): Rocker conductive parts

(41A): The first silver contact

(5A): Overheating damaged parts

(51A): Connection part

(52A): Department to be destroyed

(53A): Support

(531A): Displacement space

(54A): Fitting part

(6A): Operating components

(610A): pivot point

(61A): Operating parts

(611A): Containment tube

(612A): Contact

(62A): The first elastic part

(621A): one end

(622A): the other end

(63A): The first convex part

(7A): The second elastic part

(10A): The second convex part

Claims (2)

A switch overheating destructive power-off method includes the following steps: A first elastic force of a first elastic element is simultaneously applied to an overheat breaking element and a movable conductive element through an operating element, wherein the overheat breaking element is made of plastic material, and the first elastic force applies The direction is such that the movable conductive member can simultaneously contact a first conductive member and a second conductive member to form a current path; Making the second elastic force of a second elastic element act on the movable conductive element through the operating element, and the direction of application of the second elastic force is to make the movable conductive element away from the first conductive element or the second conductive element; When the movable conductive element is in contact with the first conductive element and the second conductive element at the same time, the overheat destruction element is arranged on a path that is not necessary for current transmission, and the overheat destruction element is arranged at a position away from the movable conductive element , On the non-necessary path of current transmission, the overheating destroyer can receive the thermal energy of the current path; So that a thermal energy of the above-mentioned current path is sequentially transferred to the overheating destruction element through the movable conductive element, the first elastic element; When the overheat breaking element receives the heat energy and the temperature rises close to a breaking temperature, the overheat breaking element is destroyed or deformed by the application of the first elastic force, and the first elastic element is deformed accordingly, causing the first elastic element to deform. The force of an elastic force acting on the movable conductive element is therefore reduced or lost. The second elastic force forces the movable conductive element to change position so that the movable conductive element no longer conducts the first conductive element and the second conductive element at the same time To interrupt the current path. According to the overheating destructive power-off method of the switch as described in item 1 of the scope of patent application, the destructive temperature of the overheating destructive element is between 100°C and 400°C.

Images