JP4839281B2 - Automatic switch disconnection structure - Google Patents

Description

  The present invention relates to a switch of a kind of control circuit, and more particularly to a switch structure that has an automatic disconnection function when a current is overloaded and can be mounted at an arbitrary angle and direction.

  The operation of the power supply control switch is performed by executing two types of operation strokes of turning on (ON) and turning off (OFF) the current circuit. In addition to performing two types of functions, ON and OFF, many existing switch structures have a function of automatic circuit disconnection (hereinafter referred to as automatic disconnection) at the time of current overload. The danger that the circuit cutting machine reacts immediately and the circuit cannot be disconnected is avoided.

There are already patents of various power control switches, for example, Patent Documents 1-6 by the present applicant. However, these patents have a common drawback.
(1) There are many interlocking parts, the interlocking process is complicated, the non-immediate operation relationship is established between the push button and the terminal part, and the manufacturing cost is high.
(2) The operational relationship is uncertain, the probability of failure is high, and it is disadvantageous in terms of consumer use and power use safety.
(3) When the circuit overheats due to current overload, the contact elastic piece jumps immediately and the circuit cannot be disconnected, or the circuit is incomplete escape, and the circuit is in a current conduction state or a local current conduction state. The electrical circuit continues to overheat creating danger.
(4) When the circuit is overheated by current overload, the contact elastic piece is in a semi-detached state, and when the contact elastic piece is cooled, it is restored to the energized state by elasticity. However, if energization and cutting are repeated continuously, a spark is formed, which is dangerous. In addition, the electronic and electrical equipment in the current circuit is stopped by repeated energization and disconnection or becomes unable to operate normally, and the service life is shortened.

  Efficiently execute the linked operation relation of the parts inside the power control switch, simplify the power control switch parts to reduce the manufacturing cost, secure the immediate reaction in the current overload state, cut the circuit and make the power usage safe To strengthen, continuing research and improvement of power control switches is an important issue for manufacturers.

US Pat. No. 5,262,748 US Pat. No. 4,167,720 US Pat. No. 4,937,548 US Pat. No. 5,223,813 US Pat. No. 5,451,729 US Pat. No. 5,558,211

  The present invention has the disadvantages that the parts of the interlocking structure of various known power control switches are complicated, the manufacturing cost is high, the interlocking relationship is indirect, the interlocking process reaction is slow, and the power control switch has many operational problems. On the other hand, in particular, when the power supply overload of the known power control switch is overloaded, it is impossible to immediately cut off (off), or the disconnection is incomplete. In addition, when the contact elastic piece is in a semi-detached state at the time of overload and overheating, and the contact elastic piece is restored to the energized state at the time of cooling, a spark is formed by repeated energization and disconnection, thereby causing a danger.

The invention of claim 1 includes a housing (1), a push button (2), an interlocking part (3), and a contact piece (4),
The housing (1) has a hollow shape, an opening (10) is provided above the housing (1), and at least two contact terminals are assembled on the bottom surface of the housing (1), and a second contact is located above one of the contact terminals. (121) is coupled, and the positioning component (17) is combined with the housing (1),
The push button (2) has a cap shape, the push button (2) is pivotally mounted on the opening (10) of the housing (1), and the push button (2) swings around the pivoted portion. The extension part (21) is provided at one end of the push button (2), and the extension part (21) and one end of the interlocking part (3) are fitted and interlocked with each other. ) Are pushed down so that the extending part (21) drives the interlocking part (3) to move up and down,
One end of the interlocking part (3) is fitted and interlocked with the extending portion (21) of the push button (2), and the contact piece (4) is connected to the other end of the interlocking part (3). The free end is connected, and the positioning component (17) of the housing (1) elastically presses one side of the interlocking component (3), so that the interlocking component (3) is securely attached to the push button (2). Positioning at the set position of the extension part (21), the interlocking part (3) achieves an on / off operation with the pressing operation on the push button (2),
The contact piece (4) is a metal piece having elasticity, one end of the contact piece (4) is connected to one of the contact terminals, and the one piece of the contact piece (4) faces two side surfaces. The contact portion (41) is formed in one piece of the contact piece (4), one side of the contact portion (41) is connected to the contact piece (4), and the contact piece (4) The other side is a free end, and a first contact (411) corresponding to the second contact (121) is installed at the free end of the contact portion (41), and the free end of the contact portion (41) When the free end of the contact piece (4) elastically springs in the opposite direction to each other and the contact piece (4) and the contact portion (41) receive heat, each of them deforms and curves in the opposite direction. An automatic switch disconnecting structure is characterized by elastically jumping toward one side.
According to a second aspect of the present invention, in the automatic switch disconnecting structure according to the first aspect, the at least two contact terminals installed in the housing (1) are a first contact terminal (11) and a second contact terminal (12, respectively). The bent portion above the first contact terminal (11) is assembled to one end of the contact piece (4), and the second contact (121) is coupled above the second contact terminal (12). The switch has an automatic disconnection structure.
According to a third aspect of the present invention, there is provided the automatic switch cutting structure according to the first aspect, wherein the positioning component (17) is an elastic body.
According to a fourth aspect of the present invention, there is provided the automatic switch cutting structure according to the third aspect, wherein the positioning component (17) is substantially L-shaped.
According to a fifth aspect of the present invention, in the automatic disconnection structure of the switch according to the first aspect, the housing (1) is provided with a fitting hole (16), and the lower part of the positioning component (17) is a horizontal bar (171). The end of the horizontal bar (171) of the positioning part (17) is bent to form a hook, and the upper part of the positioning part (17) is a vertical bar (172). The lower horizontal bar (171) is fitted into the fitting hole (16) of the housing (1), and the hook at the end of the horizontal bar (171) is engaged with the opening on the other side of the fitting hole (16). Thus, the automatic cutting structure of the switch is characterized in that the positioning component (17) is assembled to the housing (1).
According to a sixth aspect of the present invention, in the automatic disconnection structure of the switch according to the first aspect, a groove (22) is provided in the extending portion (21) of the push button (2) and is slidable in the groove (22). One end of the interlocking part (3) is fitted to the end of the interlocking part (3), and a bar (31) is provided at one end of the interlocking part (3), so that the bar (31) is slidable. An automatic switch, characterized in that it is fitted in the groove (22) of the extending part (21) and the rod (31) can be reciprocated and positioned in the groove (22). It has a cutting structure.
The invention according to claim 7 is the automatic cutting structure of the switch according to claim 6, wherein the groove (22) of the extending portion (21) of the push button (2) is composed of a horizontal groove and an upright groove extending downward. The rod body (31) of the interlocking part (3) is in the groove (21) of the extension part (21) of the push button (2) when it has a substantially inverted L-shaped bent shape and is in the circuit conduction (ON) position. 22) A self-cutting structure of the switch, characterized in that it comprises a one-stage free movement space ΔS1 in the upright groove.
The invention according to claim 8 is the automatic switch cutting structure according to claim 1, wherein an elastic part (13) is provided between the push button (2) and the housing (1), and the elastic part (13) An upward elastic force is applied to one end of the push button (2), and the rod (31) at the upper end of the interlocking component (3) is in the push button (2) under a circuit disconnection (OFF) state in a current overload. Is located at the lower end of the groove (22) of the extending portion (21) of the first forming portion to form a one-stage free movement space ΔS2, and the free movement space ΔS2 is a groove of the extending portion (21) of the push button (2) ( 22) provides a free movement path for moving the rod body (31) downward along the lower end of the push button (2) and the downward movement of the extension part (21). The extension part (21 at the right end of the push button (2) without being restricted by the rod body (31) Is not subject to the upward pressing and restriction of the rod (31) of the interlocking component (3), and the left end of the push button (2) is subjected to the upward elastic pressing of the elastic component (13), and the push button ( The switch is automatically cut off, wherein the left end of 2) is rotated upward and the right end is rotated downward, and the push button (2) is restored to a general cutting (OFF) reuse state.
The invention of claim 9 is the automatic switch cutting structure according to claim 8, wherein the elastic part (13) is a torsion spring, the middle stage of the torsion spring is a coil, and the two ends are free ends. A lateral shaft rod (14) and a convex rod (15) are provided on the inner surface of the housing (1), and a coil of a torsion spring is fitted to the shaft rod (14), so that one free end of the torsion spring is provided. Presses the lower side of the push button (2), presses the convex rod (15) after the other free end is compressed, and the push button (2) by the elastic recovery force after compression of the torsion spring. The switch has an automatic cutting structure characterized by being given an elastic force.
According to a tenth aspect of the present invention, in the automatic switch cutting structure according to the first aspect, a clamping portion (32) is provided at one end connected to the contact piece (4) of the interlocking component (3), and the clamping portion (32) is an automatic switch disconnecting structure characterized in that the free end of the contact piece (4) is actively held.
According to an eleventh aspect of the present invention, in the automatic disconnection structure of the switch according to the tenth aspect, the holding portion (32) is a holding space formed by a hook at the lower end of the interlocking component (3) and a curved piece above the hook. The automatic cutting structure of the switch is characterized in that the width of the clamping space is larger than the thickness of the contact piece (4).
According to a twelfth aspect of the present invention, there is provided an automatic switch cutting structure according to the first aspect, wherein the contact piece (4) is a composite metal flake.

  The present invention provides a kind of switch automatic disconnection structure, which utilizes active fitting of the extension part and the interlocking part of one end of the push button, and forms a groove that can be moved actively in the fitting part of the extension part, When the push button is in the position where the push button is energized (ON), the bar of the interlocking part has a single stage of free movement space in the groove of the extension part of the push button. The contact piece is deformed by heat and can freely jump in the opposite direction, is not blocked by the interlocking parts or push buttons, forms an electrical circuit disconnection (OFF), and completely jumps to make the circuit disconnected state Form and achieve the safety of electricity use.

  The present invention also ensures that the rod of the interlocking part can be positioned at the set position in the groove of the extension part by pressing one side of the interlocking part with the positioning part, and the switch is mounted at an arbitrary angle or direction. The switch can be turned on and off smoothly, and when the overload is overheated, it automatically jumps to disconnect the circuit, and the push button can be immediately restored to the original power use position.

  The present invention further provides that the switch push button automatically recovers to the normal power-off (off) reuse state after circuit disconnection due to current overload, and the user has already jumped by the position of the push button. However, it is possible to clearly know that the circuit has been disconnected, and it is convenient to use.

  The present invention also uses the push button to drive the interlocking component, pushes and pulls the free end of the contact piece, directly controls the jumping of the contact piece to control conduction and disconnection of the electric circuit, Effectively simplify the control switch interlocking parts, make the switch interlocking more direct and quick, reduce the problem of delays in part interlocking timing, further reduce the failure of the power control switch, facilitate assembly, and effectively manufacture costs To extend the service life of the power control switch structure.

  The present invention provides a kind of automatic switch disconnecting structure. The push button is pivotally mounted on the housing, and an extension part extending downward is provided at one end of the push button. A bent groove is provided in the extension part, and an elastic part is provided between the push button and the housing. Assembled, the elastic part is urged to the push button, a rod body at one end of the interlocking part is fitted in the groove of the extension part of the push button, and a positioning part is assembled to the housing separately, The positioning component presses one side of the interlocking component, the rod of the interlocking component can be reciprocated and positioned in the groove of the extending portion, and the other end of the interlocking component is a clamping portion, The sandwiching part actively clamps the free end of the contact piece.

  When the push button swings, the interlocking component is driven to push and pull the free end of the contact piece, and the free end of the contact piece is moved up and down to energize (ON) or disconnect (OFF) the electric circuit. Form a state. When the push button is in the energization (ON) position of the circuit, the bar of the interlocking part has a one-stage free movement space in the groove of the extension part of the push button, and when the current is overloaded, the contact piece is It is deformable by heat and can freely jump in the opposite direction, and is not blocked by the interlocking parts or push buttons, and forms an electrical circuit cut (OFF).

  1 to 3 are a three-dimensional exploded view, a combined sectional view in a cut (OFF) state, and a combined sectional view in an energized (ON) state according to an embodiment of the present invention. It includes a housing 1, a push button 2, an interlocking part 3 and a contact piece 4.

  The housing 1 is hollow, an opening 10 is provided above it, and at least two contact terminals are assembled to the bottom surface of the housing 1. In this embodiment, there are two contact terminals, each of which is a first contact terminal 11. The second contact terminal 12 is used. The bent portion above the first contact terminal 11 is combined with the fixed end of the contact piece 4 described above, and the second contact 121 is coupled above the second contact terminal 12. An elastic part 13 is assembled between the housing 1 and the aforementioned push button 2, and the elastic part 13 gives an elastic force to the push button 2. In the present embodiment, the elastic component 13 is a torsion spring, the middle stage of the torsion spring is a coil, the two ends are extended free ends, and a lateral shaft rod 14 and a convex rod 15 are formed on the inner surface of the housing 1. Is installed, the coil of the torsion spring is fitted into the shaft rod 14, the free end of the torsion spring presses below one end (left end) of the push button 2, and the other free end is convex after being compressed. The elastic recovery force after compression of the torsion spring presses the bar 15 and gives the push button 2 an elastic force, see FIGS. Further, the positioning component 17 is combined with the housing 1. In this embodiment, the housing 1 is provided with a fitting hole 16. The positioning component 17 is combined with the fitting hole 16. It has a shape, but is not limited to an L-shaped elastic body. The end of the lower horizontal bar 171 is bent to form a hook, and the vertical bar 172 is curved with a slight width, so that the positioning part The horizontal bar 171 below 17 is fitted into the fitting hole 16, and the hook at the end of the horizontal bar 171 engages with the opening on the other side of the fitting hole 16, so that the positioning component 17 and the fitting hole 16 are engaged. The combination with is completed.

  The push button 2 is a cap-like body, and both side surfaces of the push button 2 are pivotally mounted on the opening 10 of the housing 1 so that the push button 2 can swing around the pivoted portion. One end of the push button 2 (the right end, which is different from the end that presses one end of the elastic part 13 (torsion spring) described above) extends downward, and the extending part 21 and the one end of the interlocking part 3 are mutually connected. When the push button 2 is pressed to the left and right in the downward direction when fitted and interlocked, the extending portion 21 correspondingly drives the interlocking component 3 to operate up and down. In the present embodiment, the extending portion 21 is provided with a groove 22, and the groove 22 has an inverted L-shaped bent shape including a horizontal groove and an upright groove extending downward. One end (upper end) of the interlocking component 3 is slidably fitted in the groove 22. When the push button 2 is pressed downward and left and right, the interlocking component 3 is driven to operate up and down.

  One end of the interlocking component 3 is fitted to the extension portion 21 of the push button 2 and is driven by the push button 2. In this embodiment, a horizontal bar 31 is provided at one end (upper end) of the interlocking component 3, and the bar 31 is slidably fitted into the groove 22 of the extending portion 21 of the push button 2 described above. The rod 31 can be reciprocated and positioned in the groove 22. The other end of the interlocking part 3 is operatively connected to the free end of the contact piece 4. In this embodiment, a clamping part 32 is provided at the other end (lower end) of the interlocking part 3, and the clamping part 32 can be activated. The holding part 32 is a holding space formed by the hook 33 at the lower end of the interlocking part 3 and the bent piece 34 above the hook 33, and the width of the holding space is the contact width. Slightly larger than the thickness of the piece 4.

  In the present invention, one side of the interlocking component 3 is elastically pressed by the positioning component 17 in the housing 1 described above, that is, the vertical bar 172 of the positioning component 17 elastically presses one side of the rod 31 of the interlocking component 3. As a result, the interlocking component 3 is reliably positioned at the set position of the extending portion 21 of the push button 2, and the interlocking component 3 can achieve an on / off operation by a pressing operation on the push button 2. . Specifically, the operation of the positioning component 17 is as follows. That is, the interlocking component 3 is not affected by the earth gravity, and the rod 31 of the interlocking component 3 can be positioned at the set position in the groove 22 of the extending portion 21 of the push button 2 at any angle and direction. Thus, the interlocking component 3 is completely operated in accordance with the pressing operation on the push button 2 so that the ON / OFF operation can be smoothly performed.

  The contact piece 4 is a metal piece having elasticity, and one end thereof is assembled to a bent portion of the first contact terminal 11, and the piece of the contact piece 4 can jump toward two side surfaces. The other end of the contact piece 4 is a free end. A U-shaped groove is provided in one piece of the contact piece 4, and a contact portion 41 is formed in the central portion thereof. A fixed end of the contact portion 41 is connected to a piece of the contact piece 4, and the other end of the contact portion 41 is The free end of the contact portion 41 is combined with the first contact 411, and the free end of the contact portion 41 protrudes with respect to the plane of the single piece of the contact piece 4, as shown in FIGS. When the free end of the contact piece 4 curves downward, the free end of the contact portion 41 curves upward. When the free end of the contact piece 4 curves upward, the free end of the contact portion 41 curves downward, that is, the free end of the contact piece 4 and the free end of the contact portion 41 curve in opposite directions. The state of elastic jumping is maintained.

  The general cutting (OFF) and energization (ON) states of the present invention are as follows. As shown in FIG. 2, when the right end of the push button 2 is pushed down, the interlocking component 3 is driven and moves downward, and the clamping part 32 of the interlocking component 3 moves downward while sandwiching the free end of the contact piece 4. Therefore, the free end of the contact portion 41 of the contact piece 4 is elastically moved upward in the opposite direction, and the first contact 411 of the contact portion 41 and the second contact 121 of the second contact terminal 12 are separated to be cut off (OFF ) Form a state. At this time, the vertical bar 172 of the positioning component 17 presses the bar 31 of the interlocking component 3 in the right direction and positions it at the upper right end of the groove 22 of the extending portion 21 of the push button 2.

  When the left end of the push button 2 is pushed down, as shown in FIG. 3, the extending portion 21 at the right end of the push button 2 moves upward to drive the interlocking component 3 and move it upward. The clamping part 32 clamps the free end of the contact piece 4 and moves upward, the free end of the contact part 41 of the contact piece 4 elastically springs downward in the opposite direction, and the first contact 411 on the contact part 41 and the first contact The second contact 121 of the two-contact terminal 12 comes into contact to form an energized (ON) state. That is, the cutting (OFF) state of FIG. 2 changes to the energization (ON) state of FIG. At this time, the right end of the push button 2 is rotated upward, the vertical bar 172 of the positioning component 17 is positioned on the left side of the groove 22 of the extending portion 21 of the push button 2, and the vertical bar 172 and the interlocking component 3 are not in contact with each other. The bar 31 of the interlocking part 3 is located at the upper left end of the groove 22 of the extending part 21 of the push button 2.

  As described above, the left end and the right end of the push button 2 are pushed down, the interlocking part 3 is driven by the extending part 21 of the push button 2 to move downward and upward, and the contact piece 4 is moved by the clamping part 32 of the interlocking part 3. By sandwiching the free end and causing the contact piece 4 to jump up and down, the first contact 411 of the contact portion 41 is separated from and brought into contact with the second contact 121 of the second contact terminal 12, and the electric circuit is disconnected (OFF) or An energized (ON) state is formed, and the directly interlocked simple operation switch structure of the present invention is obtained.

  When the push button is in the circuit conduction (ON) position, as shown in FIGS. 3 and 4, the vertical bar 172 of the positioning component 17 is located on the left side of the groove 22 of the extending portion 21 of the push button 2, The vertical bar 172 and the interlocking part 3 are not in contact with each other, and the bar 31 at the upper end of the interlocking part 3 is provided with a one-step downward free movement space ΔS1 in the upright groove of the groove 22 of the extending portion 21 of the push button 2. The free movement space ΔS1 provides a path of free downward movement in the groove 22 of the rod 31 of the interlocking part 3 so that the downward movement of the entire interlocking part 3 is not limited to the extending portion 21 of the push button 2. In addition, the downward elastic jump of the free end of the contact piece 4 is not restricted. When the current is overloaded, the contact piece 4 is bent and deformed in the opposite direction (downward) by heat, the free end of the contact piece 4 elastically springs downward, and the free end of the contact portion 41 of the contact piece 4 is directed upward in the opposite direction. The first contact point 411 on the contact part 41 and the second contact point 121 of the second contact terminal 12 are separated by elastic spring, and the electric circuit is disconnected (OFF). See FIG. 5 for this.

  Please refer to FIGS. The rod 31 at the upper end of the interlocking part 3 is positioned at the lower end of the groove 22 of the extending portion 21 of the push button 2 in the jumping and cutting (OFF) state when the current is overloaded, and forms a one-stage free movement space ΔS2. The free movement space ΔS2 provides a downward free movement path along the groove 22 of the extending portion 21 of the push button 2, that is, the downward movement of the right end of the push button 2 and the extending portion 21 is At this time, the extending portion 21 at the right end of the push button 2 is not subject to the upward pressing and restriction of the rod 31 of the interlocking component 3, and the left end of the push button 2 is not at the elastic member 13. Due to the upward elastic pressing, the left end of the push button 2 is rotated upward and the right end is rotated downward, and the push button 2 is restored to a general cutting (OFF) reuse state, as shown in FIG. It is.

  The following points should be particularly noted. The present invention utilizes the elasticity of the vertical bar 172 of the positioning component 17 in the housing 1 and appropriately presses one side of the rod 31 of the interlocking component 3 so that the interlocking component 3 is not completely affected by gravity. As a result, even if the present invention is at an arbitrary angle or orientation, the rod 31 of the interlocking component 3 is positioned at the position set in the groove 22 of the extending portion 21 of the push button 2, thereby The object of reliably operating in accordance with the pressing operation of the push button 2 and smoothing the on / off operation is achieved. In addition, after the overload overheat jump, the vertical bar 172 of the positioning component 17 presses the bar 31 of the interlocking component 3 in the right direction so as to be positioned again at the upper right end of the groove 22 of the extending portion 21 of the push button 2 and pushed. The button 2 can be reliably restored to a general cutting (OFF) reuse state.

  The operation process of the present invention is simplified and quick. When the current is overloaded, the switch part operation is not disturbed, the contact part 41 of the contact piece 4 is deformed by heat and freely jumps in the opposite direction, and the electric circuit is completely cut off (OFF). In addition, the push button 2 is automatically restored to the reusable state of the general disconnection (OFF) state after jumping due to current overload, and is attached to any angle or direction without being affected by gravity. Is possible.

It is a three-dimensional exploded view of the Example of this invention. It is combination sectional drawing of the Example of this invention, and has shown the cutting | disconnection (OFF) state of the Example of this invention. It is combination sectional drawing of the Example of this invention, and has shown the electricity supply (ON) state of the Example of this invention. FIG. 4 is a local enlarged view of FIG. 3, and shows a free movement space ΔS <b> 1 of the groove 22 of the extending portion 21 of the push button 2 of the rod 31 of the interlocking component 3. FIG. 5 is a combined sectional view of the embodiment of the present invention, and when the current is overloaded in the energized (ON) state of the embodiment of the present invention, the contact piece 4 and the contact portion 41 curve in the opposite direction to push the interlocking component 3. The state which moved and moved and formed the cutting | disconnection (OFF) state is shown. FIG. 6 is a local enlarged view of FIG. 5, showing a free movement space ΔS <b> 2 of the groove 22 of the extending portion 21 of the push button 2 of the rod 31 of the interlocking component 3.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing 10 Opening 11 1st contact terminal 12 2nd contact terminal 121 2nd contact 13 Elastic part 14 Shaft bar 15 Convex bar 16 Fitting hole 17 Positioning part 171 Horizontal bar 172 Vertical bar 2 Push button 21 Extension part 22 Groove 3 Interlocking Parts 31 Rod body 32 Holding part 33 Hook 34 Single body 4 Contact piece 41 Contact part 411 First contact ΔS1 Free movement space ΔS2 Free movement space

Claims (12)

A housing (1), a push button (2), an interlocking part (3), and a contact piece (4) are included. The housing (1) is hollow and an opening (10) is provided above the housing (1). At least two contact terminals are assembled to the bottom surface of (1), a second contact (121) is coupled above one of the contact terminals, and a positioning component (17) is assembled to the housing (1),
The push button (2) has a cap shape, the push button (2) is pivotally mounted on the opening (10) of the housing (1), and the push button (2) swings around the pivoted portion. The extension part (21) is provided at one end of the push button (2), and the extension part (21) and one end of the interlocking part (3) are fitted and interlocked with each other. ) Are pushed down so that the extending part (21) drives the interlocking part (3) to move up and down,
One end of the interlocking part (3) is fitted and interlocked with the extending portion (21) of the push button (2), and the contact piece (4) is connected to the other end of the interlocking part (3). The free end is connected, and the positioning component (17) of the housing (1) elastically presses one side of the interlocking component (3), so that the interlocking component (3) is securely attached to the push button (2). Positioning at the set position of the extension part (21), the interlocking part (3) achieves an on / off operation with the pressing operation on the push button (2),
The contact piece (4) is a metal piece having elasticity, one end of the contact piece (4) is connected to one of the contact terminals, and the one piece of the contact piece (4) faces two side surfaces. The contact portion (41) is formed in one piece of the contact piece (4), one side of the contact portion (41) is connected to the contact piece (4), and the contact piece (4) The other side is a free end, and a first contact (411) corresponding to the second contact (121) is installed at the free end of the contact portion (41), and the free end of the contact portion (41) When the free end of the contact piece (4) elastically springs in the opposite direction to each other and the contact piece (4) and the contact portion (41) receive heat, each of them deforms and curves in the opposite direction. An automatic switch cutting structure characterized by elastically jumping toward one side.   The switch automatic disconnection structure according to claim 1, wherein at least two contact terminals installed in the housing (1) are a first contact terminal (11) and a second contact terminal (12), respectively. A switch characterized in that a bent portion above the terminal (11) is assembled to one end of the contact piece (4), and a second contact (121) is coupled above the second contact terminal (12). Automatic cutting structure.   2. The automatic switch cutting structure according to claim 1, wherein the positioning component (17) is an elastic body.   4. The automatic switch cutting structure according to claim 3, wherein the positioning part (17) is substantially L-shaped.   The switch automatic cutting structure according to claim 1, wherein the housing (1) is provided with a fitting hole (16), and a lower part of the positioning part (17) is a horizontal bar (171), and the positioning part (17) is provided. The end of the horizontal bar (171) is bent to form a hook, the upper part of the positioning part (17) is a vertical bar (172), and the horizontal bar (171) below the positioning part (17). ) Is fitted into the fitting hole (16) of the housing (1), and the hook at the end of the horizontal bar (171) is engaged with the opening on the other side of the fitting hole (16). An automatic switch cutting structure characterized in that a positioning part (17) is assembled to the switch.   2. The automatic cutting structure of a switch according to claim 1, wherein a groove (22) is provided in the extending portion (21) of the push button (2), and the interlocking component (3) is slidable in the groove (22). One end of the interlocking part (3) is provided with a rod body (31), and the rod body (31) is slidable in the extension part (21) of the push button (2). An automatic switch cutting structure characterized by being fitted into the groove (22) and capable of reciprocating and positioning the rod (31) in the groove (22).   7. The automatic switch cutting structure according to claim 6, wherein the groove (22) of the extending portion (21) of the push button (2) is composed of a horizontal groove and an upright groove extending downward, and is substantially inverted L-shaped. When it is curved and in the position of circuit conduction (ON), the rod (31) of the interlocking part (3) is in the upright groove of the groove (22) of the extending part (21) of the push button (2). A switch automatic disconnection structure comprising a single stage of free movement space ΔS1.   The automatic switch cutting structure according to claim 1, wherein an elastic part (13) is provided between the push button (2) and the housing (1), and the elastic part (13) is provided on the push button (2). An upward elastic force is applied to one end, and the rod (31) at the upper end of the interlocking component (3) is in the extended portion (21) of the push button (2) under a circuit disconnection (OFF) state in a current overload. It is located at the lower end of the groove (22) and forms a one-stage free movement space ΔS2, and the free movement space ΔS2 extends along the groove (22) of the extending portion (21) of the push button (2). A free movement path for moving the body (31) downward is provided, that is, the downward movement of the right end of the push button (2) and the extending portion (21) of the rod body (31) of the interlocking part (3). Without being restricted, the extension (21) at the right end of the push button (2) is connected to the interlocking part (3 And the left end of the push button (2) is subjected to the upward elastic pressure of the elastic part (13) and the left end of the push button (2) is directed upward. An automatic switch disconnecting structure characterized in that the right end is rotated downward and the push button (2) is restored to a general disconnection (OFF) reuse state.   9. The automatic cutting structure of a switch according to claim 8, wherein the elastic part (13) is a torsion spring, a middle stage of the torsion spring is a coil, two ends are extended free ends, and the housing (1) A lateral shaft rod (14) and a convex rod (15) are provided on the inner surface, a coil of a torsion spring is fitted to the shaft rod (14), and one free end of the torsion spring is connected to the push button (2 ), The convex portion (15) is pressed after the other free end is compressed, and the elastic force is applied to the push button (2) by the elastic recovery force after compression of the torsion spring. An automatic switch cutting structure characterized by that.   2. The automatic switch cutting structure according to claim 1, wherein a clamping part (32) is provided at one end of the interlocking component (3) connected to the contact piece (4), and the clamping part (32) is the contact piece. An automatic switch disconnecting structure characterized by holding the free end of (4) in an active manner.   11. The automatic switch cutting structure according to claim 10, wherein the clamping part (32) is a clamping space formed by a hook at the lower end of the interlocking part (3) and a curved piece above the hook, Automatic switch cutting structure, characterized in that the width is larger than the thickness of the contact piece (4).   2. The switch automatic cutting structure according to claim 1, wherein the contact piece (4) is a composite metal piece.

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