Heat destructive disconnecting switch

Abstract

A heat destructive disconnecting switch comprises a first conductive member, a second conductive member, a movable conductive member, an overheating destructive member, an operating component, and a second elastic member. The movable conductive member conducts electricity to the first conductive member and the second conductive member. The overheating destructive member is formed as an integral body on a limiting member, and a first elastic member is compressed to between a contact member and the overheating destructive member, thereby providing the first elastic member with a first elastic force. The second elastic member is provided with a second elastic force. When the overheating destructive member is destructed due to overheating, the first elastic force is smaller than the second elastic force, causing the movable conductive member to disconnect the first conductive member from the second conductive member to achieve a protective effect from overheating.

Claims

1. A heat destructive disconnecting switch, comprising: a base, which is provided with a holding space; a first conductive member, which penetrates and is mounted on the base; a second conductive member, which penetrates and is mounted on the base; a movable conductive member, which is mounted within the holding space and electrically connected to the first conductive member, and selectively connects with the second conductive member; an overheating destructive member, which is destructed under a fail temperature condition, the fail temperature lying between 100 C. to 250 C.; an operating component, which is assembled on the base, wherein the operating component comprises an operating member and a first elastic member, the operating member comprises a contact member and a limiting member, the contact member contacts the movable conductive member; the overheating destructive member is formed as an integral body on the limiting member, the first elastic member is compressed and confined between the contact member and the overheating destructive member and is provided with a first elastic force; a second elastic member, which is provided with a second elastic force that acts on the operating member; wherein arrangement of the first conductive member and the second conductive member is defined as being in a lengthwise direction; the operating member is provided with a length in the lengthwise direction, the first elastic member is disposed at a central position of the length of the operating member, and there is a distance between a disposed position of the second elastic member on the length of the operating member and the central position; whereby when the operating member is at a first position, the first elastic force presses and forces the contact member to butt against the movable conductive member, which then contacts the second conductive member to form a power-on state; when in the power-on state, an electric current passes through the first conductive member, the movable conductive member, and the second conductive member and produces heat energy, which is transferred to the overheating destructive member through the contact member and the first elastic member, the overheating destructive member absorbs the heat energy and is destructed under the fail temperature condition, resulting in lessening or loss of the first elastic force, at which time the second elastic force is larger than the first elastic force, and the second elastic force presses and forces the operating member to displace to a second position, thereby causing the movable conductive member to separate from the second conductive member and form a power-off state.

2. The heat destructive disconnecting switch according to claim 1, wherein the second elastic member is a spring.

3. The heat destructive disconnecting switch according to claim 1, wherein the movable conductive member is a conductive seesaw member, which astrides and is mounted on the first conductive member; the contact member slides on the conductive seesaw member, thereby enabling the conductive seesaw member to selectively contact or separate from the second conductive member in a seesaw movement.

4. The heat destructive disconnecting switch according to claim 1, wherein the operating member is provided with a pivot connecting point that is pivotably connected to the base, thereby enabling the operating member to use the pivot connecting point as an axis and limit back and forth rotation.

5. The heat destructive disconnecting switch according to claim 1, wherein the operating member further comprises a central cylinder and an inner cylinder, the limiting member and a through hole are provided in an end of the central cylinder away from the movable conductive member, and the central cylinder is tightly fitted on the inner cylinder; the inner cylinder is provided with a penetrating retaining space, and the first elastic member is inserted within the penetrating retaining space, two ends of the penetrating retaining space are respectively provided with a first opening and a second opening, the contact member partially penetrates into the penetrating retaining space and also partially extends out the first opening, the overheating destructive member is formed as an integral body on the limiting member and positioned on peripheral edge of the through hole, a diameter of the through hole is larger than a width of the first elastic member, and restriction by the overheating destructive member that has not yet been destructed is used to compress and confine the first elastic member between the contact member and the overheating destructive member.

6. The heat destructive disconnecting switch according to claim 1, wherein the contact member is a hollow shaped heat conducting member, which comprises an open end and a curved contact end; the contact end contacts the movable conductive member, and one end of the first elastic member extends into the open end.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a schematic view of a first embodiment of the present invention, and shows a seesaw switch structure with the seesaw switch in a closed position.

(2) FIG. 1A is a schematic view of the first embodiment of the present invention, and shows partial enlargement of a through hole depicted in FIG. 1.

(3) FIG. 2 is a schematic view of the first embodiment of the present invention, and shows the seesaw switch in an open position.

(4) FIG. 3 is a schematic view of the first embodiment of the present invention, and shows, when an overheating destructive member is destructed due to overheating, a movable conductive member separated from a second conductive member, causing the seesaw switch to revert to a closed position from an open position and form an open circuit.

(5) FIG. 4 is a schematic view of a second embodiment of the present invention, and shows a press switch structure with the press switch in a closed position.

(6) FIG. 5 is a schematic view of the second embodiment of the present invention, and shows the press switch in an open position.

(7) FIG. 6 is a schematic view of the second embodiment of the present invention, and shows, when an overheating destructive member is destructed due to overheating, a movable conductive member separated from a second conductive member to form an open circuit.

(8) FIG. 7 is an exploded view of a third embodiment of the heat destructive disconnecting switch of the present invention used in an extension cord socket.

(9) FIG. 8 is a structural view of the third embodiment of the heat destructive disconnecting switch of the present invention used in an extension cord socket.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(10) Based on the above-described technological characteristics, the major effects of a plug socket and a heat destructive disconnecting switch thereof of the present invention are clearly presented in the following embodiments.

(11) Referring to FIG. 1 and FIG. 1A, which show a first embodiment of the present invention, wherein the heat destructive disconnecting switch of the present embodiment is a seesaw switch, and FIG. 1 depicts the seesaw switch in a closed state. The seesaw switch comprises:

(12) A base (1C), which is provided with a holding space (11C);

(13) A first conductive member (2C) and a second conductive member (3C), both of which penetrate and are mounted on the base (1C);

(14) A movable conductive member, which is mounted within the holding space (11C), wherein the movable conductive member is a conductive seesaw member (4C) that astrides and is mounted on the first conductive member (2C) and electrically connected thereto; and

(15) An overheating destructive member (5C) that is destructed under a fail temperature condition, the fail temperature lying between 100 C. to 250 C. The overheating destructive member (5C) is not used to maintain the continued supply of electric current; therefore, insulating material such as plastic can be used or non-insulating material made from a low-melting alloy, such as an alloy of bismuth and any one of or a composition from a plurality of the metals cadmium, indium, silver, tin, lead, antimony, or copper; or other low-melting metals or alloys with melting points lying between 100 C. to 250 C., such as a tin-bismuth alloy with a melting point around 138 C.

(16) When there is a temperature anomaly in the operating temperature, resulting in a rise in temperature, it is preferred that a live wire triggers a circuit break. Therefore, the first conductive member (2C) in use is a live wire first end, the second conductive member (3C) in use is a live wire second end, and the conductive seesaw member (4C) is used to enable electrical conduction with the first conductive member (2C) and the second conductive member (3C) to form a live wire closed circuit.

(17) The seesaw switch of the present embodiment is further provided with an operating component (6C), which is used to operate the conductive seesaw member (4C) to connect with the first conductive member (2C) and the second conductive member (3C) to form a live wire closed circuit, or disconnect the circuit between the first conductive member (2C) and the second conductive member (3C), causing the live wire to form an open circuit. The operating component (6C) is assembled on the base (1C) and comprises an operating member (61C) and a first elastic member (62C), wherein the operating member (61C) provides a press surface as a nonconductor. The operating member (61C) is also provided with a pivot connecting point (611C), which is pivot connected to the base (1C) to enable the operating member (61C) to use the pivot connecting point (611C) as an axis and limit back and forth rotation. The operating member (61C) further comprises a contact member, a central cylinder (610C), an inner cylinder (614C), and a limiting member (612C). The contact member is a hollow shaped heat conducting member (613C), which comprises an open end (6131C) and a curved contact end (6132C). The contact end (6132C) of the heat conducting member (613C) contacts the conductive seesaw member (4C). The limiting member (612C) and a through hole (615C) are provided in the end of the central cylinder (610C) away from the conductive seesaw member (4C), and the central cylinder (610C) is tightly fitted on the above-described inner cylinder (614C). The inner cylinder (614C) is provided to with a penetrating retaining space (6141C), and the first elastic member (62C) is inserted within the retaining space (6141C). The two ends of the retaining space (6141C) are respectively provided with a first opening (6142C) and a second opening (6143C). The heat conducting member (613C) partially penetrates into the retaining space (6141C) and partially extends out from the first opening (6142C). The overheating destructive member (5C) is formed as an integral body on the limiting member (612C) and positioned on the peripheral edge of the through hole (615C). The diameter of the through hole (615C) is larger than the width of the first elastic member (62C), and one end of the first elastic member (62C) extends into the open end (6131C) of the heat conducting member (613C). Moreover, restriction by the overheating destructive member (5C) that has not yet been destructed is used to compress and confine the first elastic member (62C) between the heat conducting member (613C) and the overheating destructive member (5C), thereby providing the first elastic member (62C) with a first elastic force.

(18) The seesaw switch of the present embodiment is further provided with a second elastic member (7C), which, in the present embodiment, is a spring. The second elastic member (7C) is provided with a second elastic force that acts on the operating member (61C).

(19) Referring to FIG. 2, a user toggles the operating member (61C) back and forth around the pivot connecting point (611C), which causes the heat conducting member (613C) to slide on the conductive seesaw member (4C), thereby enabling selective contact or separation of the heat conducting member (613C) from the second conductive member (3C) in a seesaw movement. When the heat conducting member (613C) slid on the conductive seesaw member (4C) in the direction of a silver contact point (41C) on the conductive seesaw member (4C), the first elastic force forces the silver contact point (41C) to contact the second conductive member (3C) and form a power-on state.

(20) Referring to FIG. 3, when an abnormal condition occurs in an external electric equipment connected to the first conductive member (2C) or the second conductive member (3C), for example, the external electric equipment is a plug socket, oxides or dust present between the metal pins of a plug and the plug socket, or phenomena such as incomplete insertion of the metal pins or distorted metal pins will produce relatively large amounts of heat energy in the electrical conducting portions of the plug socket, whereupon the heat energy is transferred to the conductive seesaw member (4C) through the first conductive member (2C) or the second conductive member (3C), and then through the heat conducting member (613C) and the first elastic member (62C) to the overheating destructive member (5C). The overheating destructive member (5C) gradually absorbs the heat energy up to the melting point thereof, at which time the overheating destructive member (5C) begins to gradually lose its rigidity. For example, if the material of the overheating destructive member (5C) is a tin-bismuth alloy, although the melting point thereof is 138 C., the tin-bismuth alloy begins to lose its rigidity when the temperature is close to its melting point, and under the concurrent effect of the first elastic force, the overheating destructive member (5C) is compressed and deformed by the first elastic member (62C) to the extent of being destructed. This causes the first elastic member (62C) to break through the overheating destructive member (5C) and extend out through the through hole (615C), resulting in lessening or loss of the first elastic force; at which time the second elastic force is larger than the first elastic force. In the present embodiment, the arrangement of the first conductive member (2C) and the second conductive member (3C) is defined as being in a lengthwise direction, and the operating member (61C) has a length in the lengthwise direction. The first elastic member (62C) is disposed at the central position of the length. There is a distance between the disposed position of the second elastic member (7C) on the length and the central position; therefore, when the second elastic force is larger than the first elastic force, a torque effect forces the operating member (61C) to rotate on the pivot connecting point (611C) as an axis and slides the heat conducting member (613C) on the conductive seesaw member (4C), thereby forcing the operating member (61C) to displace and form a closed position. Accordingly, the silver contact point (41C) of the conductive seesaw member (4C) separates from the second conductive member (3C) to form a power-off state, thereby achieving the protective effect against overheating.

(21) Referring to FIG. 4, which shows a second embodiment of the present invention, wherein the heat destructive disconnecting switch of the present embodiment is a press switch. FIG. 4 shows the press switch in a closed state, comprising:

(22) A base (1D), which is provided with a holding space (11D) and a protruding portion (12D);

(23) A first conductive member (2D) and a second conductive member (3D), both of which penetrate and are mounted on the base (1D);

(24) A movable conductive member, which is mounted within the holding space (11D), wherein the movable conductive member is a conductive cantilever member (4D); and

(25) An overheating destructive member (5D), which is destructed under a fail temperature condition, the fail temperature lying between 100 C. to 250 C. The overheating destructive member (5D) is not used to maintain the continued supply of electric current, therefore, insulating material such as plastic can be used or non-insulating material made from a low-melting alloy, such as an alloy of bismuth and any one of or a composition from a plurality of the metals cadmium, indium, silver, tin, lead, antimony, or copper; or other low-melting metals or alloys with melting points lying between 100 C. to 250 C., such as a tin-bismuth alloy with a melting point around 138 C.

(26) When there is a temperature anomaly in the operating temperature, resulting in a rise in temperature, it is preferred that a live wire triggers a circuit break. Therefore, the first conductive member (2D) in use is a live wire first end, the second conductive member (3D) in use is a live wire second end, and the conductive cantilever member (4D) is used to conduct current to the first conductive member (2D) and the second conductive member (3D) to form a live wire closed circuit.

(27) The press switch of the present embodiment is further provided with an operating component (6D), which is used to operate the conductive cantilever member (4D) to connect with the first conductive member (2D) and the second conductive member (3D) to form a live wire closed circuit, or disconnect the circuit between the first conductive member (2D) and the second conductive member (3D), causing the live wire to form an open circuit. The operating component (6D) is assembled on the base (1D) and comprises an operating member (61D) and a first elastic member (62D), wherein the operating member provides a press surface as a nonconductor. The operating member (61D) is mounted on the protruding portion (12D) and has limited up and down displacement thereon. The up and down displacement and positioning structure of the entire operating component (6D) is the same as the press button structure of an automatic ball-point pen of the prior art, such as the prior art structure of a Push-button Switch disclosed in China Patent No. CN103441019; therefore, the drawings of the present embodiment omit illustrating a number of structural positions disclosed in the prior art. The operating member (61D) comprises a contact member, a central cylinder (610D), an inner cylinder (614D), and a limiting member (612D). The limiting member (612D) and a through hole (615D) are provided in the end of the central cylinder (610D) away from the conductive cantilever member (4D). The central cylinder (610D) is tightly fitted on the above-described inner cylinder (614D), and the inner cylinder (614D) is provided with a penetrating retaining space (6141D). The first elastic member (62D) is inserted within the retaining space (6141D), and the two ends of the retaining space (6141D) are respectively provided with a first opening (6142D) and a second opening (6143D). The contact member is a supporting heat conducting member (613D) that is installed at the first opening (6142D). The overheating destructive member (5D) is formed as an integral body on the limiting member (612D), and is positioned on the peripheral edge of the through hole (615D). The diameter of the through hole (615D) is larger than the width of the first elastic member (62D). The supporting heat conducting member (613D) is provided with a limiting post (6131D) and a supporting base (6132D), wherein the limiting post (6131D) extends into one end of the first elastic member (62D), causing the first elastic member (62D) to butt against the supporting base (6132D), and thereby enabling the supporting base (6132D) to contact the conductive cantilever member (4D). Restriction by the overheating destructive member (5D) that has not yet been destructed is used to compress and confine the first elastic member (62D) between the supporting heat conducting member (613D) and the overheating destructive member (5D), thereby providing the first elastic member (62D) with a first elastic force.

(28) The press switch of the present embodiment is further provided with a second elastic member, which is a spring plate (7D). The first conductive member (2D), the spring plate (7D), and the conductive cantilever member (4D) are formed as an integral body. The spring plate (7D) is provided with a second elastic force that acts on the operating member (61D).

(29) Referring to FIG. 5, a user displaces the operating member (61D) relative to the protruding portion (12D), just like pressing the button on an automatic ball-point pen, which causes the conductive cantilever member (4D) to selectively contact or separate from the second conductive member (3D). When the operating member (61D) is displaced in the direction of the conductive cantilever member (4D) and positioned, the supporting base (6132D) of the supporting heat conducting member (613D) presses a position close to a silver contact point (41D) of the conductive cantilever member (4D), which causes the conductive cantilever member (4D) to contact the second conductive member (3D) and form a power-on state. At the same time, the first elastic member (62D) is further compressed, enlarging the first elastic force thereof, at which time the first elastic force is larger than the second elastic force.

(30) Referring to FIG. 6, when an abnormal condition occurs in an external electric equipment connected to the first conductive member (2D) or the second conductive member (3D), for example, the external electric equipment is a plug socket, oxides or dust present between the metal pins of a plug and the plug socket, or incomplete insertion or distortion of the metal pins will produce relatively large amounts of heat energy in the electrical conducting portions of the plug socket, whereupon, the heat energy is transferred to the conductive cantilever member (4D) through the first conductive member (2D) or the second conductive member (3D), and then through the supporting base (6132D) of the supporting heat conducting member (613D), the limiting post (6131D), and the first elastic member (62D) to the overheating destructive member (5D). The heat is then finally transferred to the overheating destructive member (5D), which gradually absorbs the heat energy up to the melting point thereof, at which time the overheating destructive member (5D) begins to gradually lose its rigidity. For example, if the material of the overheating destructive member (5D) is a tin-bismuth alloy, although the melting point thereof is 138 C., the tin-bismuth alloy begins to lose its rigidity when the temperature is close to its melting point, and under the concurrent effect of the first elastic force, the overheating destructive member (5D) is compressed and deformed by the first elastic member (62D) to the extent of being destructed, and, thus, no longer able to restrain the first elastic member (62D). Consequently, the first elastic member (62D) destructs the overheating destructive member (5D) and extends out through the through hole (615D), resulting in lessening or loss of the first elastic force, at which time the second elastic force is larger than the first elastic force, which forces the conductive cantilever member (4D) to restore its original position, causing the silver contact point (41D) of the conductive cantilever member (4D) to separate from the second conductive member (3D) and form a power-off state, thereby achieving the protective effect against overheating.

(31) Referring to FIG. 7 and FIG. 8, which show a third embodiment of the present invention, wherein the heat destructive disconnecting seesaw switch of the above-described embodiment is applied in an extension cord socket comprising three socket aperture (81). The extension cord socket comprises:

(32) A casing (8), which is provided with an upper casing (8A) and a lower casing (8B), wherein the upper casing (8A) comprises the three socket apertures (81), and each of the socket apertures (81) comprises a live wire socket (811) and a neutral wire socket (812);

(33) A live wire conductive member (9), which is installed in the casing (8), wherein the live wire conductive member (9) is provided with three spaced live wire connecting ends (92) corresponding to three independent live wire insert pieces (91), each of which comprises a live wire slot (911). The live wire slots (911) correspond to the live wire sockets (811);

(34) A neutral wire conductive member (1C), which is installed in the casing (8), wherein the neutral wire conductive member (1C) is provided with three spaced neutral wire slots (101). The neutral wire slots (101) respectively correspond to the neutral wire sockets (812); and

(35) Three heat destructive disconnecting switches (20), which are as described above in the first embodiment and the second embodiment, wherein a first conductive member (201) of each of the heat destructive disconnecting switches (20) is connected to the respective live wire connecting end (92) of the live wire conductive member (9) or the live wire insert piece (91), and a second conductive member (202) is connected to the respective live wire insert piece (91) or the live wire connecting end (92) of the live wire conductive member (9). The present embodiment uses the first conductive members (201) respectively connected to the live wire insert pieces (91) and the second conductive members (202) respectively connected to the live wire connecting ends (92) of the live wire conductive member (9) as an example (the characteristics of the connecting method for this portion is described above in the first embodiment and the second embodiment, and thus not further detailed herein). Accordingly, when there is a temperature anomaly in the operating temperature resulting in a rise in temperature in any one of the live wire insert pieces (91) of the extension cord socket, heat energy is transferred to the heat destructive disconnecting switch (20) associated therewith through the first conductive member (201) or the second conductive member (202), whereupon overheating causes the heat destructive disconnecting switch (20) to break the circuit and cut off the supply of power. At which time the live wire insert piece (91) with an abnormal temperature immediately cuts off the supply of power, stopping the operating temperature from continuing to rise and enabling the operating temperature to slowly fall. Because each of the heat destructive disconnecting switches (20) independently controls a set of the live wire socket (811) and neutral wire socket (812), when any one of the heat destructive disconnecting switches (20) breaks the circuit due to overheating, the other sets of the live wire socket (811) and neutral wire socket (812) can still continue to operate as normal.

(36) It is of course to be understood that the embodiments described herein are merely illustrative of the principles of the invention and that a wide variety of modifications thereto may be effected by persons skilled in the art without departing from the spirit and scope of the invention as set forth in the following claims.