Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H81/00—Protective switches in which contacts are normally closed but are repeatedly opened and reclosed as long as a condition causing excess current persists, e.g. for current limiting
  • H01H81/02—Protective switches in which contacts are normally closed but are repeatedly opened and reclosed as long as a condition causing excess current persists, e.g. for current limiting electrothermally operated
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H15/00—Switches having rectilinearly-movable operating part or parts adapted for actuation in opposite directions, e.g. slide switch
  • H01H15/02—Details
  • H01H15/04—Stationary parts; Contacts mounted thereon
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H23/00—Tumbler or rocker switches, i.e. switches characterised by being operated by rocking an operating member in the form of a rocker button
  • H01H23/02—Details
  • H01H23/08—Bases; Stationary contacts mounted thereon
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
  • H01H9/02—Bases, casings, or covers
  • H01H9/0271—Bases, casings, or covers structurally combining a switch and an electronic component
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
  • H01H33/02—Details
  • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
  • H01H33/16—Impedances connected with contacts
  • H01H33/161—Variable impedances
  • H01H2033/163—Variable impedances using PTC elements

Definitions

• the present invention relates to a switch used for various electric and Z or electronic devices, and relates to a switch operated by a mechanical switching operation (hereinafter, also simply referred to as “switch”).
• switches that are operated by mechanical switching operation are used for controlling power on / off switching and Z or electric circuit switching, for example.
• Such switches are known to include, for example, slide switches, toggle switches, rotary switches, push switches and rocker switches (or tumbler switches).
• a switch is generally used together with a current fuse in order to protect the load of an electric circuit from overcurrent and improve the safety of the electric Z electronic device (hereinafter referred to as "current fuse").
• a switch having no such protection function is referred to as a conventional general switch.
• a current fuse is inserted in series between a switch and a load, and the current is used.
• PTC elements have been used as overcurrent protection elements instead of current fuses, and switches using PTC elements have been proposed (see, for example, Patent Document 1).
• the PTC element is provided in the operation unit so as to be connected in series with the load. More specifically, a PTC material (PTC resin) is embedded in a rotary switch that can rotate within a predetermined plane, and an electrode plate is formed on the exposed surface of the PTC material to operate the PTC element. (See FIG. 3 of Patent Document 1).
• PTC material PTC resin
• Such a switch configuration provides a switch with V ⁇ and overcurrent protection that does not need to be used with a current fuse.
• PTC material refers to a material having a positive temperature coefficient (Positive Temperature Coefficient), as is known in the field of electric and electronic circuit technology.
• PTC materials have a low electrical resistance (or impedance) under relatively low temperature conditions (eg, at room temperature), but the electrical resistance increases rapidly above a certain temperature (hereinafter referred to as a trip temperature).
• the former state is referred to as a low state, and the latter state is referred to as a high state.
• PTC element refers to an element formed by forming conductive members spaced from each other on the surface of a PTC material. This conductive member functions as an electrode, and is also simply referred to as an electrode or an electrode plate in this specification.
• Patent Document 1 JP-A-10-188716
• the present invention has been made to solve the above problems, and an object of the present invention is to provide a novel switch with an overcurrent protection function.
• a switch that can switch between a state in which the two terminals are separated from one of these two terminals at least one of the two terminals has (1) a conductive contact portion that contacts the movable member, and (2) an external element (
• a switch having: a conductive connection portion electrically connected to a load or a power supply; and (3) a PTC member sandwiched between the contact portion and the connection portion.
• PTC member means a member generally using a PTC material unless otherwise specified.
• a PTC member may be a PTC element having a PTC material layer (for example, a sheet of PTC material) and a pair of conductive material layers (for example, metal foil) located on the opposing surfaces.
• the pair of conductive material layers function as electrodes, and these conductive material layers are electrically connected to the contact portion and the connection portion, respectively.
• the present invention is not necessarily limited to this, and, for example, the PTC member may simply be a PTC material layer.
• the conductive contact portion and the connection portion function as electrodes
• the terminal having the PTC member functions as a whole as a PTC element.
• a PTC member (specifically, a PTC element) is inserted in series in an electric circuit, so that a switch with an overcurrent protection function can be provided.
• the PTC member is in the low state in the normal energized state, and the PTC member trips and transitions to the high state when a power overcurrent that allows a large current to flow to the load flows into the electric circuit
• the current can be effectively reduced, and preferably substantially cut off. Therefore, when the switch of the present invention is applied to an electric Z electronic device, unlike a conventional general switch, a current fuse (and its attached parts) is not required, so that the space can be reduced, the number of components and the number of processes can be reduced.
• the switch of the present invention incorporates a PTC member on the terminal side, so that the degree of freedom in design is greater than when the PTC member is incorporated on the operation unit side, which has many structural and dimensional restrictions. Is high.
• the contact and connection parts of the terminal can be easily changed in shape by various metal processing techniques such as metal plate punching, plating, sputtering, etc., and can be drawn like a lead wire. This is because PTC members can be incorporated in any empty space.
• the present invention is broadly applicable to various types of switches, such as slide switches, tognores switches, rotary switches, push switches and rocker switches (or tumbler switches).
• the basic structure of these switches, excluding the features of the present invention, is well known in the art and will not be described. However, those skilled in the art will understand the features of the present invention based on the description in this specification. It may be applicable to various types of switches.
• the PTC member is sandwiched between the conductive contact portion and the conductive connection portion of the terminal, there is no possibility that the electrode for the PTC member is peeled off.
• the conductive material layer functioning as an electrode is provided between the PTC material layer and the contact portion or the connection portion. Since the electrode is sandwiched and does not receive friction, there is no possibility that the electrode is peeled off.
• the conductive contact portion and the connection portion themselves function as electrodes, so that there is no need to provide a separate electrode, and the electrode may be peeled off. Absent.
• the area occupied by the PTC member (the so-called chip area, specifically, the PTC material layer) Area of the opposing surface) can be used effectively. That is, a pair of electrodes (more specifically, a conductive member that can function as an electrode) can be arranged on the facing surfaces of the PTC material layer, respectively.
• the electrode area can be set larger than in the case of arranging on one surface. This allows more current to flow over a larger volume of PTC material, lowering the resistance of the PTC material in the low state and improving current efficiency in the energized state.
• the area ratio (or coverage) of the conductive material layer to the PTC material layer at the contact surface between the PTC material layer and the conductive material layer is preferably at least 50% or higher from the viewpoint of improving current efficiency. Most preferably it is about 100%.
• PTC materials usable in the present invention for the PTC member include a polymer PTC material and a ceramic PTC material.
• Polymer PTC materials include, for example, carbon black and
• conductive particles such as metal powder comprises dispersed in a polymeric material such as polyethylene
• the difference between the low-state resistance and the high-state resistance is large, and the resistance rises sharply with temperature changes. Also, with ceramic PTC materials, the resistance rises when the temperature is too low (ie, the temperature coefficient reverses from positive to negative), but such a phenomenon does not occur with polymer PTC materials. Therefore, it is preferable to use a polymer PTC element, but the present invention is not limited to this.
• the PTC material layer may be provided in any appropriate arrangement as long as the PTC member is sandwiched between the contact portion and the connection portion of the terminal.
• the principal surface (or layer surface) of the PTC material layer can be arranged, for example, substantially perpendicularly and substantially parallel to the principal surface of the substrate. .
• a spacer may be used to hold the PTC material layer between the contact portion and the connection portion in some cases. If an external force is applied to the PTC material, it will adversely affect the PTc characteristics (eg, resistance-temperature characteristics), and the intended overcurrent protection function may not be fully achieved. In particular, when a pressing force is applied as an external force, the resistance value in the low state decreases as the thickness of the PTC material becomes thinner, and the volume expansion due to temperature rise is hindered by the pressing force, so that a higher temperature cannot be achieved. ⁇ and overcurrent protection function s.
• PTc characteristics eg, resistance-temperature characteristics
• the spacer is particularly preferable that the pressing force of the movable member or other members (for example, a panel) be applied in the thickness direction of the layer.
• the spacer is preferably made of a material that is harder than the PTC material, such as a metal or a solid resin material.
• the spacer may have any suitable shape such as a plate, a column, and a sphere.
• the spacer does not have these contacts unless the conductive contacts and conductive connections make electrical contact. / Formed integrally with the gap! / Good! /.
• the switch of the present invention only needs to have at least two terminals, and the number and arrangement of the terminals are not particularly limited.
• the material, shape and structure of the terminals at least one of the two terminals that can be electrically connected via the conductive movable member has a PTC member between the conductive contact part and the conductive connection part. V, as long as it is any suitable thing V ⁇ .
• the material, shape, and movement of the conductive movable member are not particularly limited as long as the mechanical and electrical contact between the movable member and the terminal can be switched by mechanically moving the conductive movable member.
• "mechanically moving the movable member” means that the movable member is moved by exerting a mechanical action on the movable member, for example, by manually operating the operation unit.
• the switch of the present invention includes first, second, and third terminals, and by moving the movable member mechanically, the movable member comes into contact with the first and second terminals simultaneously, and the third terminal
• the movable contact can be switched between a state in which the movable member is separated from the first terminal and a state in which the movable terminal is in contact with the second and third terminals simultaneously, and the second terminal is in contact with the movable member.
• Such a switch is suitably used for electric circuit switching.
• the switch of the present invention is not limited to this, and can be widely used in various electric Z electronic devices, for example, for control such as power on / off switching and Z or electric circuit switching. .
• an apparatus including an electric circuit using the above-described switch.
• Such devices may be, for example, motorized toys, household appliances and various other electrical Z electronics.
• a novel switch with an overcurrent protection function is provided.
• the switch of the present invention When the switch of the present invention is applied to electric / electronic devices, compared to the case of using a conventional general switch used in combination with a current fuse, space saving, a reduction in the number of parts, simplification of a manufacturing process, and safety are achieved. Advantages such as improvement of the properties can be obtained.
• the switch of the present invention has increased design flexibility (or applicability to various types of switch structures) and safety compared to a switch with an overcurrent protection function having a PTC element on the operation unit side. There are advantages such as improved current efficiency.
• FIG. 1 is a schematic view of a slide switch according to one embodiment of the present invention, where FIG. 1 (a) is a schematic cross-sectional view, and FIG. 1 (b) is a schematic top view showing a movable part omitted.
• FIG. 1 (c) is a schematic sectional view taken along the line XX of FIG. 1 (b).
• FIG. 2 is a schematic view of a slide switch according to another embodiment of the present invention, wherein FIG. 2 (a) is a schematic cross-sectional view, and FIG. 2 (b) is a schematic top view in which movable parts are omitted.
• FIG. 2 (c) is a schematic sectional view taken along the line Y-Y of FIG. 2 (b).
• FIG. 3 is a schematic view of a toggle switch according to another embodiment of the present invention, wherein FIG. 3 (a) is a schematic sectional view in a neutral state, and FIG. 3 (b) is a schematic sectional view in a non-neutral state.
• a slide switch is a switch that opens and closes a contact by sliding and operating an operation unit.
• an example of a one-circuit, two-contact slide switch that can be used for electric circuit switching will be described.
• the slide switch 10 of the present embodiment has a conductive movable member 9 and three terminals 1, 2, and 3.
• the terminals 1, 2 and 3 have fixed contacts and are fixed to the substrate 5, respectively.
• the movable member 9 has a movable contact, and constitutes a movable part together with the operation unit 7 and the blade 11.
• the movable member 9 is fitted into the concave portion of the operating portion 7 so as to be able to move up and down. Pressed.
• Such a slide switch 10 exposes an upper end (hereinafter, also referred to as a thumb) of the operation unit 7 in a housing (not shown) having the substrate 5 as a bottom so as to be slidable in a direction indicated by a double arrow. It can be accommodated in a state where it has been left.
• the terminal 2 is composed of a contact portion 2a, a connection portion 2c, and a PTC member 2b sandwiched therebetween. More specifically, in the slide switch 10 of the present embodiment, the contact portion 2a and the connection portion 2a are provided above the substrate 5 so that the facing surface of the PTC member 2b is substantially parallel to the surface of the substrate 5. Interposed between parts 2c! (See FIGS. 1 (a) and 1 (b)).
• the contact portion 2a of the terminal 2 is a portion that makes mechanical and electrical contact with the movable member 9.
• connection portion 2c is a portion that is electrically connected to an external element (not shown, for example, a load or a power supply) by, for example, soldering. As shown, the connection 2c may have the same shape as the connection of the terminals 1 and 3. Both the contact portion 2a and the connection portion 2c are made of a conductive material, generally a metal material. Contact parts 2a and The contact portion 2c can be appropriately formed by a general metal working technique such as metal stamping.
• the PTC member 2b of the terminal 2 is a PTC element having a PTC material layer and a pair of conductive material layers respectively disposed on opposing surfaces of the PTC material layer.
• the layer forms an opposing surface of the PTC member 2b, and is electrically connected to the contact portions 2a and the contact portions 2c.
• a polymer PTC material for the PTC material.
• the polymer PTC material layer can be produced, for example, by dispersing conductive particles such as carbon black and Z or metal powder in a polymer material such as polyethylene and forming a layer or sheet.
• the conductive material layer may be, for example, any metal foil, and the metal foil can be pressure-bonded to both surfaces of the PTC material layer by a hot press or the like. In this embodiment, the conductive material layer covers the entire opposing surface of the PTC material layer (coverage 100%).
• the configuration of the slide switch 10 of the present embodiment may be the same as a conventional general slide switch except for the terminal 2 described above (in the conventional general slide switch, terminals 1 and 3 are connected). A similar terminal is used for the center terminal corresponding to terminal 2).
• the conductive movable member 9 may be a general metal contact piece.
• the operation unit 7 and the substrate 5 may be members made of an insulating material, for example, a resin material.
• the panel 11 may be a general string panel or a spring.
• Terminals 1 and 3 may be common metal terminals. These terminals 1 and 3 are solder terminals in the illustrated embodiment, but are not limited thereto. These members can be manufactured in the same manner as the corresponding members of the conventional slide switch.
• Such a slide switch 10 can be easily assembled by those skilled in the art by manufacturing each member as described above.
• Fig. 1 (a) shows a state in which the movable member 9 is in contact with the terminals 1 and 2 at the same time and is separated from the terminal 3.A (The fixed contact between the terminals 1 and 2 is closed by the movable contact of the movable member 9). While the fixed contacts of terminals 2 and 3 are open.
• the movable member 9 separates from the terminal 1 and contacts the terminals 2 and 3 simultaneously. While closing the fixed contacts between terminals 2 and 3, And between the two fixed contacts (open).
• the state B is switched to the force A. That is, it is possible to switch between the states AB by sliding the operation unit 7 and mechanically moving the movable member 9.
• the movable member 9 moves up and down along the inner wall surface of the concave portion of the operation section 7 due to the elasticity of the panel 11, and exceeds the projection of the contact section 2a. As a result, switching between the states AB can be reliably performed, and a feeling of switching can be obtained.
• the contact portion 2a receives a pressing force via the movable member 9 in the thickness direction of the PTC member 2b.
• the pressing force is supported by the left and right ends of the contact portion 2a functioning as a spacer, and the force applied to the PTC member 2b can be dispersed. As a result, the influence of the pressing force on the PTC characteristics of the PTC member 2b can be reduced, and the overcurrent protection function can be sufficiently performed.
• the terminal 2 includes the PTC member 2b, and the PTC member 2b is inserted into the electric circuit in series in any of the states A and B. It is. Therefore, when an overcurrent flows through the electric circuit, the PTC member 2b trips to a high state to reduce the current, thereby fulfilling the function of overcurrent protection.
• the PTC member is sandwiched between the contact portion and the connection portion of the terminal, so that the electrode (the conductive material layer of the PTC member in the present embodiment) is more likely to be separated. Safety is obtained.
• the area occupied by the PTC member (the so-called chip area) can be maximally used, and normal power supply can be performed. Very high current efficiency can be obtained because a large amount of current can flow in this state. It is.
• the one-circuit two-contact type slide switch 10 that is switched between states A and B that can be used for electric circuit switching
• the slide switch 10 of the present embodiment can be variously modified. This will be understood by those skilled in the art.
• a neutral state N by flattening the upper part of the contact portion 2a, making the movable member 9 contact only the terminal 2 and separating from both the terminals 1 and 3! Yo! /.
• this neutral state N any fixed contact is "open” and the current is turned off.
• the spacer may be omitted in that case.
• the contact portion 2a and the connection portion 2c are formed in a plate shape (see FIG. 1 (c)).
• the connection portion 2c may be formed so as to occupy the space between the substrate 5 and the PTC member 2b.
• a PTC element (electrode coverage: 100%) in which a conductive material layer (electrode) is provided as the PTC member 2b so as to cover the entire opposing surface of the PTC material layer is used.
• the entire opposing surface does not necessarily have to be covered. The higher the coverage, the better if it is at least 50% or more.
• the conductive material layer can be omitted, and only the PTC material layer can be used as the PTC member 2b. In this case, the contact portion 2a and the connection portion 2c function as electrodes, and the entire terminal 2 performs the same function as the PTC element.
• the force of using the polymer PTC material for the PTC material layer is not limited to this, and a ceramic PTC material is used instead of the polymer PTC material! /
• FIGS. 2 (a) and 1 (c) Another example in which the present invention is applied to a slide switch will be described with reference to FIGS. 2 (a) and 1 (c).
• This embodiment is a modification of the slide switch of the first embodiment.
• the slide switch 10 'of the present embodiment has the same configuration as the slide switch 10 of the above-described first embodiment except for the configuration of the terminal 2'.
• Fig. 2 (a) and (c) Fig. 1 (a)-(c Members corresponding to the members shown in parentheses) are given the same reference numerals.
• the slide switch 10 'of the present embodiment is the same as the slide switch 10 of the first embodiment.
• the terminal 2 ′ is composed of a contact part 2 a ′, a connection part 2 c ′, and a PTC member 2 b ′ sandwiched therebetween. More specifically, the contact portion 2a 'is routed along the substrate 5, and the PTC member 2b' stands on the substrate 5 so that its opposing surface is substantially perpendicular to the surface of the substrate 5. It is inserted between the contact portion 2a 'and the connection portion 2c' (see FIGS. 2 (b) and 2 (c)). The portions of the contact portion 2a 'and the connection portion 2c' that sandwich the PTC member 2b 'face each other with a distance corresponding to the thickness of the PTC member 5, and function as a panel panel for fixing the PTC member 2b' therebetween. You may.
• the slide switch 10 'of the present embodiment has an overcurrent protection function similarly to the slide switch 10 of the first embodiment.
• the pressing force that the contact portion 2a' receives from the movable member 9 is not transmitted to the PTC member 2b ', so that the PTC member 2b' The characteristics can be prevented from being adversely affected.
• the contact part 2a 'and the connection part 2c' function as a panel panel, the pressing force applied from the panel panel in the thickness direction of the PTC member 2b 'is such that the PTC member 2b' can be fixed. As long as it is present, it can be made as small as possible without adversely affecting the PTC characteristics.
• slide switch of the first embodiment can also be obtained by such a slide switch of the present embodiment.
• slide switch of the present embodiment can be appropriately modified in the same manner as described in the first embodiment.
• a toggle switch is a switch that opens and closes contacts by operating the operation unit upside down.
• an example of a one-circuit two-contact toggle switch that can be used for electric circuit switching and power supply ON / OFF will be described.
• the toggle switch 20 of the present embodiment has a conductive movable member 29 and three terminals 21, 22, and 23.
• the terminals 21, 22 and 23 have fixed contacts and are fixed to the substrate 25, respectively.
• the movable member 29 has a movable contact,
• the movable part is constituted together with the operation part 27, the panel 31, the post and the support post 33, and the converter 35.
• the movable member 29 has a shape in which two curved portions are connected via a central portion, and the central portion is fitted into a terminal 22 (more specifically, a contact portion 22a described later). I have.
• An insulative converter 35 is arranged on the movable member 29 so as to be in contact with both curved portions of the movable member 29, and the tip of the converter 35 is inserted into a concave portion between both curved portions.
• One end of the post 33 is inserted into the upper central part of the converter 35.
• a protrusion extending left and right is provided in the vicinity of one end of the post 33 so as to be separated from the converter 35.
• the other end of the post 33 is arranged in the cavity of the operation unit 27. The post 33 is pressed against the converter 35 by the elastic force of the panel 31 arranged in the cavity of the operation unit 27.
• Such a toggle switch 20 is provided such that an upper end (hereinafter, also referred to as a lever) of an operation unit 27 can be tilted in a direction indicated by a double arrow in a housing (not shown) having a substrate 25 as a bottom. It can be accommodated in a state where it has been left.
• the round convex portion below the operation section 27 contacts an inner wall surface (not shown) of the housing, and the contact point can be a fulcrum when the upper end of the operation section 27 is tilted.
• the terminal 22 includes a contact portion 22a, a connection portion 22c, and a PTC member 22b sandwiched therebetween. More specifically, in the todal switch 20 of the present embodiment, the contact portion 2a and the contact portion 2a of the PTC member 22b are arranged above the substrate 5 so that the opposing surface thereof is substantially parallel to the surface of the substrate 25. Inserted between connecting parts 2c.
• PTC member 22 is a PTC element having a PTC material layer and a pair of conductive material layers respectively disposed on opposing surfaces of the PTC material layer.
• the configuration of the toggle switch 20 of the present embodiment may be the same as that of a conventional general toggle switch except for the terminal 22 (in the conventional general toggle switch, the terminals 21 and 23 are connected to each other).
• a similar terminal is used for the central terminal corresponding to terminal 22).
• the conductive movable member 29 may be a general metal contact piece.
• the converter 35 and the substrate 5 may be members made of an insulating material, for example, a resin material.
• Panel 31 is a general string It may be a coil spring or a spring.
• the operation section 27 and the post 33 are not particularly limited, and may be formed of any appropriate material.
• the terminals 21 and 23 may be general metal terminals, and are PC terminals in the illustrated embodiment, but are not limited thereto. These members can be manufactured in the same manner as the corresponding members of the conventional toggle switch.
• toggle switch 20 can be easily assembled by those skilled in the art.
• FIG. 3A shows a neutral state N in which the operation unit 27 stands up, the movable member 29 contacts only the terminal 22, and is separated from the terminals 21 and 23.
• the operating section 27 is tilted rightward in the figure by holding the lever with a hand, for example, the post 33 is similarly tilted rightward, and the elastic force of the spring 31 pushes the converter 35 to tilt leftward.
• the movable member 29 receives the pressing force from the operation unit 27 and falls down to the left, and the tip of the left curved portion comes into contact with the tip of the terminal 21.
• the right protrusion of the post 33 comes into contact with the converter 35 to serve as a limiter.
• the movable member 29 is in contact with the terminals 21 and 2 at the same time, and is separated from the terminal 3 A (the movable contact of the movable member 29 Is closed, while the fixed contacts at terminals 22 and 23 are open. Thereafter, when the operation unit 27 is tilted in the left direction in the figure, the movable member 29 is tilted to the right by the mechanism inverted from the above, and the tip of the right curved portion comes into contact with the tip of the terminal 23.
• the movable member 29 comes into contact with the terminals 22 and 23 at the same time and is separated from the terminal 21 B (while the fixed contacts of the terminals 22 and 23 are closed by the movable contact of the movable member 29, The state between the fixed contacts 21 and 22 is opened. That is, it is possible to switch between the states ANB by moving the movable member 29 mechanically by raising and lowering the operation unit 27.
• the terminal 22 includes the PTC member 22b, and the PTC member 22b is inserted in series into the electric circuit in any of the states A and B. . Therefore, when an overcurrent flows in the electric circuit, the PTC member trips to a deactivated state to reduce the current and fulfill the function of overcurrent protection, and the same effects as in the first embodiment can be obtained.
• the one-circuit two-contact toggle switch 20 that can be switched between ANB and the state that can be used for power on / off switching and electric circuit switching has been described. Can be modified.
• a spacer is provided to maintain the thickness of the PTC member.V, no, but the component in the thickness direction of the PTC member 22b of the pressing force due to the tilting of the operation unit 27 to the left and right adversely affects PTC characteristics. Is small enough not to give a problem.
• the pressing force component can be reduced by adjusting the elasticity of the panel 31.
• the pressing force applied to the PTC member can be reduced by reducing the number of windings of the string winding panel 31 and reducing the Z or the wire diameter.
• a spacer may be provided.
• the contact portion 22a is integrally formed with left and right ends functioning as a spacer! / Poteyo
• a PTC element is used in which a conductive material layer (electrode) is provided as a PTC member so as to cover the entire opposing surface of the PTC material layer! Modifications similar to those described above in the first embodiment can be made.
• the present invention is not limited thereto, and various modifications may be made within the range of V without departing from the basic concept of the present invention.
• the gains will be appreciated by those skilled in the art.
• the present invention can be applied to various switches by selecting any type of switch, the number of circuits and the number of contacts.
• the switch of the present invention is incorporated in an electric circuit of, for example, an electric toy, a household electrical appliance, and various other electric Z electronic devices, and controls, for example, power on / off switching and Z or electric circuit switching. Can be used as a switch with overcurrent protection function.

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• Slide Switches (AREA)
• Thermistors And Varistors (AREA)
• Tumbler Switches (AREA)
• Contacts (AREA)
• Thermally Actuated Switches (AREA)

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• 2004
  • 2004-02-06 JP JP2004030418A patent/JP4433283B2/ja not_active Expired - Fee Related
• 2005
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  • 2005-02-02 WO PCT/JP2005/001481 patent/WO2005076301A1/ja not_active Ceased
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