JP2009152008A - Switch device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a switch device capable of setting an initial position of a signal-use movable contactor in assembling the device, and at the same time, capable of enhancing resistance against external force such as vibration and shock. <P>SOLUTION: The device includes a signal-use contact mechanism 4 having signal-use fixed contacts 40a housed in a case 2, an operating piece 30 integrally rocking with a handle 3, and a signal-use movable contactor 41 coming in and out of contact with the signal-use fixed contacts 40a in accordance with the rocking toward an on-position or an off-position of the handle 3. The signal-use movable contactor 41 is provided with: a fixed part 41a press-fit and fixed to the case 2 at one end in a length direction; and a movable contact part 41b free in bending with the fixed part 41a as a fulcrum at the other end in a length direction and coming in and out of contact with the signal-use fixed contacts 40a. Further, the signal-use contact mechanism 4 is provided with contact-holding parts 20b holding the movable contact part 41b in its bent state. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a switch device in which a contact is turned on / off as a handle is swung.

  Conventionally, the switch apparatus 100 as shown to Fig.4 (a), (b) is provided (for example, refer patent document 1). This switch device 100 is used for on / off operation of two contact mechanism parts 101, a container body 102 in which each contact mechanism part 101 is accommodated, and a contact mechanism part 101 swingably supported by the container body 102. The bipolar switch device includes a handle 103 and a reversing spring 104 composed of a coil spring that connects each contact mechanism 101 and the handle 103. The reversing spring 104 has a handle 103 positioned at an off position. The contact mechanism 101 is turned off by bending in one direction while the handle 103 is turned, and the contact mechanism 101 is turned on by bending in the other direction when the handle 103 is located at the on position. Is configured to perform a bending operation that bends in one direction or the other by elastic force when it is in the most compressed state when swinging between the on position and the off position. There.

  Therefore, in the switch device 100, when the handle 103 is swung from the off position to the on position or from the on position to the off position, after the handle 103 is swung until the reversing spring 104 is in the most compressed state, When the balance of the reversing spring 104 is lost, the reversing spring 104 is bent, whereby the handle 103 is swung suddenly so that the both contact mechanism 101 is turned on or off. In such a switch device 100, the contact mechanism unit 101 is quickly turned on / off by the bending operation of the reversing spring 104, so that an arc is suppressed from occurring in the contact mechanism unit 101.

  Further, in such a switch device 100, a switch in which the signal contact mechanism unit 105 is configured so as to obtain an electrical signal for confirming the on / off state of the both contact mechanism unit 101 without directly looking at the switch device. A device is provided. Hereinafter, the signal contact mechanism 105 will be described with reference to the drawings. As shown in FIG. 5, the signal contact mechanism 105 includes a pair of (one in the figure) signal fixed contacts 105 a housed in the container 102 and the handle 103 fixed to the on position of the handle 103. The signal contact mechanism 105b is connected to and separated from the signal fixed contact 105a in response to the swing to the off position. The signal contact mechanism 105 is movable during the bending operation of the reversing spring 104. The contact 105b is configured to come into contact with the signal fixed contact 105a.

Thus, when the handle 103 swings to the on position, the signal movable contact 105b contacts the signal fixed contact 105a to turn on the signal fixed contact 105a, and when the handle 103 swings to the off position, the signal Since the movable contact 105b is separated from the signal fixed contact 105a and the signal fixed contact 105a is turned off, the on / off state of the contact mechanism unit 101 is confirmed by applying a voltage between the signal fixed contacts 105a. It is possible to obtain an electrical signal for
JP-A-7-296680 (see FIGS. 1 to 5)

  However, in the above conventional example, when assembling the apparatus, the portion of the signal movable contact 105b that comes in contact with and separates from the signal fixed contact 105a is not fixed, and thus the initial position of the signal movable contact 105 varies. There is a possibility that the signal contact mechanism 105 cannot perform a desired operation. Further, when the apparatus is assembled, the signal movable contact 105 may move due to external forces such as vibration and impact.

  The present invention has been made in view of the above points, and can determine the initial position of the signal movable contactor when assembling the apparatus, and can improve resistance to external forces such as vibration and impact. An object is to provide a switch device.

  In order to achieve the above object, the power supply contact mechanism unit for reversing the state in which the power contact is on and the state in which the power contact is off and the power contact mechanism unit are accommodated. Swing between the container and the position where one end of the front of the container protrudes forward of the front of the container from the other end and the position of the other end protrudes forward of the front of the container from the one end. A switch that is movably supported, and is configured to reverse the power contact mechanism and switch the power contact on / off when the handle swings from one of the positions to the other position. A signal fixed contact housed in a container, an operation piece projecting in a direction from the handle toward the signal fixed contact and swinging integrally with the handle, and to an on or off position of the handle Is moved to and away from the fixed signal contact And a signal contact mechanism used for determining the on / off state of the power contact mechanism. The signal movable contact is made of a strip-shaped metal plate and has a longitudinal direction. A fixed portion that is press-fitted and fixed to the container at one end, a movable contact portion that can be freely bent with the fixed portion as a fulcrum at the other end in the longitudinal direction, and that contacts and separates from the signal fixed contact; and the fixed portion and the movable contact portion A pressing portion that is bent convexly toward the handle and disposed on the track of the operation piece, and is pressed when the handle is displaced from the off position to the on position or from the on position to the off position. The movable contact part opens and closes the signal fixed contact when the part is pressed by the operation piece, and the signal contact mechanism part is provided with a contact holding part that holds the movable contact part in a bent state. It is characterized by that.

  According to a second aspect of the present invention, in the first aspect of the invention, the movable contact portion is provided with protruding pieces protruding outward at both ends in the width direction, and the contact holding portion is the protruding piece in the movable contact portion. It is characterized by being formed so as to hold only.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the container body is provided with a regulating portion that abuts the operation piece at a limit position within a range in which the handle swings and restricts the swinging of the operation piece. It is characterized by that.

  According to the first aspect of the present invention, since the movable contact for signal can be fixed in a predetermined state by holding the movable contact portion in the bent state, the initial position of the movable contact for signal can be fixed. Therefore, it is possible to prevent the signal contact mechanism portion from performing a desired operation due to variations in the initial position of the signal movable contact. In addition, it is possible to prevent the signal movable contact from moving due to an external force during the assembly of the device, and thus to improve resistance to vibration and impact.

  According to the second aspect of the present invention, when the signal fixed contact is disposed on the portion of the device that faces the signal movable contact during the assembly of the device, it corresponds to a portion other than the projecting piece of the movable contact portion. Since there is no contact holding part in the space, the signal fixed contact can be easily arranged.

  According to the invention of claim 3, further swinging of the handle can be restricted by restricting the swing of the operation piece by the restricting portion when trying to push the handle beyond the swinging range, Therefore, the signal movable contact can be prevented from being plastically deformed by preventing the handle from being pushed in more than necessary.

  Hereinafter, embodiments of a switch device according to the present invention will be described with reference to the drawings. In the following description, the vertical direction in FIG. 1A is defined as the front-rear direction, and the horizontal direction in FIG. As shown in FIG. 1 (a), the switch device 1 according to the present embodiment includes a pair of power source contact mechanism parts through which a large current such as a commercial power source flows, a container body 2 in which the power source contact mechanism parts are accommodated, On the front surface of the body 2, it swings between a position where one end (left end) protrudes from the other end (right end) (off position) and a position where the right end protrudes from the left end (on position). A handle 3 that is movably supported, and a reversing spring (not shown) made of a coil spring that connects the power contact mechanism and the handle 3, the reversing spring has the handle 3 positioned in the off position. The power contact mechanism is turned off by bending it in one direction (right direction) while the handle 3 is in the other position (left direction) when the handle 3 is in the on position. When the contact mechanism is turned on and the handle 3 swings between the on position and the off position, By the compressed state, configured to perform a bending operation for bending to the right side or left side by the elastic force. The power contact mechanism is well known as described in the above conventional example and does not relate to the gist of the present invention.

  In addition, the switch device 1 protrudes in a direction from the handle 3 toward the signal fixed contact 40a and is integrally formed with the handle 3 in a pair (one in the figure) of the signal fixed contact 40a housed in the container body 2. The switch 30 has an operating piece 30 that swings, and a signal movable contact 41 that is brought into and out of contact with the signal fixed contact 40a in accordance with the swing of the handle 3 to the on or off position. A signal contact mechanism 4 used for determining the state is provided.

  The signal movable contact 41 is bent from a metal plate made of a conductive and flexible material such as copper, and has one end (left end) in the longitudinal direction as shown in FIG. 1 (b). A fixed portion 41a that is bent into a substantially U-shape and is press-fitted and fixed to a terminal block 20 to be described later, and can be flexed with the fixed portion 41a as a fulcrum at the other end portion (right end portion) in the longitudinal direction. A movable contact portion 41b that contacts and separates from the contact 40a, and a pressing portion 41c that is bent upward and pressed against the operation piece 30 between the fixed portion 41a and the movable contact portion 41b. . Here, a substantially rectangular protruding piece 41e is integrally protruded outward on both side edges of the movable contact portion 41b in the width direction. Further, the fixing portion 41a is provided with a substantially rectangular locking piece 41d cut and raised from its substantially center.

  The container body 2 is, for example, a synthetic resin molded product, and is formed in a substantially rectangular parallelepiped shape having an open front surface. The container body 2 is generally attached to both inner side surfaces in the short direction of the container body 2 so as to be swingably attached. Circular bearing holes (not shown) are respectively formed. Further, as shown in FIGS. 2 (a) to 2 (c), a pair of spring pieces 2a spaced apart in the short direction are integrally projected on both outer side surfaces of the container body 2 in the longitudinal direction. The spring piece 2a is used for attaching the switch device 1 to an attachment surface (not shown) provided in an apparatus or the like.

  Inside the vessel body 2 is formed a power contact storage chamber (not shown) for storing a pair of power contact mechanisms respectively, and a signal contact storage for storing the signal contact mechanism 4. A chamber 2A is formed, and as shown in FIG. 1 (a), a substantially rectangular parallelepiped terminal block 20 having left and right ends projecting forward is detachably provided on the bottom surface of the signal contact storage chamber 2A. It has been.

  As shown in FIG. 1B, a pair of insertion holes (not shown) are provided at one end (right end) of the terminal block 20 in the longitudinal direction, and both signals are fixed to the insertion holes. The signal terminal portions 40b of the pair of pin-shaped signal fixed contacts 40 are inserted so that the contacts 40a are exposed forward. Further, a substantially flat projecting portion 20a is projected forward from the other end portion (left end portion) of the terminal block 20 in the longitudinal direction, and the substantially rectangular shape penetrating the projecting portion 20a. The signal movable contact 41 is inserted into an insertion hole (not shown) provided at the rear end of the projecting portion 20a in a state where the movable contact 41b of the signal movable contact 41 is inserted through the shaped window hole 20c. The signal movable contact 41 is disposed on the terminal block 20 by press-fitting and fixing the fixed portion 41a. The fixing portion 41a is securely fixed when the distal end portion of the locking piece 41d is locked to a locked portion (not shown) when press-fitted into the terminal block 20.

  Here, at the right end of the terminal block 20, a pair of substantially L-shaped contact holding portions 20b are provided so as to sandwich the signal fixed contact 40a so as to be spaced apart from each other, and a signal is sent to the contact holding portion 20b. The movable contact portion 41b is held in a bent state by hooking the protruding piece 41e of the movable contact 41 for use. For this reason, the signal movable contact 41 can be fixed in a predetermined state, and the initial position of the signal movable contact 41 can be positioned.

  As shown in FIG. 1 (a), the handle 3 is supported by the container body 2 so that the rear end portion is accommodated in the container body 2 so as to be swingable (rotatable). It is a molded product and is formed in a substantially rectangular parallelepiped shape with an open rear surface. On both outer side surfaces of the handle 3 in the short direction, a substantially circular shaft portion (not shown) that is swingably supported by the bearing hole of the container body 2 is integrally projected. In addition, a substantially square bar-like operation piece 30 for fixing the signal movable contact 41 is integrally projected on the rear surface of the front wall portion 31 of the handle 3 corresponding to the signal contact storage chamber 2A. Yes. Here, the operation piece 30 is for placing the movable contact portion 41b of the signal movable contact 41 at a predetermined position inside the container body 2 by pressing the pressing portion 41c of the signal movable contact 41. With the operation piece 30, the movable contact portion 41b is separated from the pair of signal fixed contacts 40a when the handle 3 is located at the off position, and the pair of signals when the handle 3 is located at the on position. It arrange | positions in the position which contacts the fixed contact 40a for a use.

  The switch device 1 of the present embodiment is configured by the members described above. Hereinafter, the operation of the switch device 1 will be described with reference to FIG. The state shown in FIG. 1A shows a state where the switch device 1 is off. In this state, the handle 3 is rotated clockwise (clockwise in FIG. 1A) and is in the off position. When the handle 3 is in the off position as described above, as shown in FIG. 1A, the movable contact portion 41b of the signal movable contact 41 is separated from the pair of signal fixed contacts 40a. As a result, the signal contact mechanism 4 is in an OFF state. Therefore, when a voltage is applied between the pair of signal terminal portions 40b of the signal contact mechanism portion 4 in this state, the signal contact mechanism portion 4 is in an OFF state, and therefore, a low level (0 V) electrical signal is output. The

  Here, from the state in which the handle 3 is in the off position, the handle 3 is swung to the on position, that is, the handle 3 is turned counterclockwise by pressing the left end side of the front face of the handle 3 backward (FIG. 1 ( When it is rotated counterclockwise in a), the handle 3 swings to the ON position, and the operation piece 30 presses the pressing portion 41c, so that the signal movable contact 41 is moved downward with the fixed portion 41a as a fulcrum. The movable contact portion 41b comes into contact with the pair of signal fixed contacts 40a. In this state, the two power contact mechanism units and the signal contact mechanism unit 4 are each turned on. Therefore, when a voltage is applied between the pair of signal terminal portions 40b in this state, the signal contact mechanism portion 4 is turned on, so that an electric signal having a voltage value corresponding to the applied voltage is output. For this reason, in the switch apparatus 1 of this embodiment, the electric signal for judging the ON / OFF state of the power supply contact mechanism part can be obtained.

  As described above, the signal movable contact 41 can be fixed in a predetermined state by holding the movable contact 41b on the contact holding portion 20b in a bent state. Therefore, it is possible to prevent the signal contact mechanism unit 4 from performing a desired operation due to variations in the initial position of the signal movable contact 41. In addition, when the switch device 1 is assembled, the signal movable contact 41 can be prevented from moving due to an external force, and thus resistance to vibration and impact can be improved.

  Further, in the present embodiment, as shown in FIG. 1B, a portion of the terminal block 20 that faces the movable contact portion 41b of the signal movable contact 41, that is, a portion where the signal fixed contact 40a is provided is excluded. Since the contact holding part 20b is provided at the site and only the projecting piece 41e of the movable contact part 41b is held by the contact holding part 20b, the contact holding part 20b is provided in the space where the signal fixed contact 40a is disposed. Since it does not exist, the signal fixed contact 40a can be easily disposed when the switch device 1 is assembled.

  Note that, as shown in FIG. 1A, the protruding portion 20 a of the terminal block 20 of the present embodiment comes into contact with the operating piece 30 at the limit position of the range in which the handle 3 swings and the operating piece 30 swings. It plays the role of the regulatory department that regulates For example, as shown in FIG. 3, when the protruding base 20a is not provided on the terminal block 20, that is, when the restriction is not provided, the right end of the front face of the handle 3 is further pushed in from the state of the handle 3 in FIG. When the handle 3 is to be rotated, the operation piece 30 is also swung as the handle 3 is swung, and the pressing portion 41c of the signal movable contact 41 is further pushed in. As a result, the signal movable contact is moved. There was a possibility that 41 may be plastically deformed. In contrast, in the present embodiment, for example, in FIG. 1A, even if the right end portion of the front surface of the handle 3 is further pushed to rotate the handle 3, the operation piece 30 comes into contact with the projecting portion 20a and swings. Since the movement is restricted, the handle 3 can be prevented from being pushed more than necessary, and the signal movable contact 41 can be prevented from being plastically deformed.

  Further, as shown in FIG. 1 (b), a substantially rectangular upright piece 20d is integrally protruded toward the outer side of the middle part of the projecting part 20a, and the terminal block 20 is placed inside the container body 2. When arranged, a space surrounded by the front end portion of the terminal block 20, the inner surface of the container body 2, and the standing piece 20d is formed. The space serves as a foreign material entrance portion 2b for attracting foreign materials such as dust that may enter through the gap between the container body 2 and the handle 3, and by attracting foreign materials from the outside to the space, It is possible to prevent a short circuit between the signal fixed contacts 40a. In addition, as shown in FIG.1 (b), you may provide the same foreign material guiding part 2b not only on the left side inside the container 2, but on the right side by processing the inner surface of the container 2. FIG.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows embodiment of the switch apparatus which concerns on this invention, (a) is a schematic sectional drawing, (b) is a schematic perspective view of a movable contact for signals and a terminal block. It is a figure which shows an external appearance same as the above, (a) is the side view seen from one direction, (b) is the side view seen from the direction different from said one direction, (c) is a front view. It is a schematic sectional drawing which shows the switch apparatus with which the conventional control part is not provided. It is a figure which shows the conventional switch apparatus, (a) is a schematic sectional drawing, (b) is an external view. It is a schematic sectional drawing which shows the signal contact mechanism part in the conventional switch apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Switch apparatus 2 Body 20a Protrusion part (regulation part)
3 Handle 30 Operation piece 4 Signal contact mechanism 40a Signal fixed contact 41 Signal movable contact 41a Fixed portion 41b Movable contact portion 41c Pressing portion 41e Projection piece

Claims (3)

  A power contact mechanism that reverses the power contact is turned on and off, a container that houses the power contact mechanism, and one end on the front of the container is the other end A handle that is swingably supported between a position that protrudes further forward of the front of the body and a position where the other end protrudes forward of the front of the body rather than one end. A switching device configured to reverse the power contact mechanism by switching from one position to the other to switch on / off of the power contact, and is a signal fixed contact accommodated in the body And an operation piece that protrudes in the direction from the handle toward the signal fixed contact and swings integrally with the handle, and a signal that contacts and separates from the signal fixed contact according to the swing of the handle to the on position or the off position. Movable contactor for power supply contact mechanism A signal contact mechanism used for determining the on / off state, and the signal movable contact is made of a band-shaped metal plate, and is fixed to the body at one end in the longitudinal direction. At the other end, a movable contact portion that can be freely bent with the fixed portion as a fulcrum and is in contact with and away from the signal fixed contact, and is bent convexly toward the handle between the fixed portion and the movable contact portion. And a movable contact portion for signal use when the handle is pushed by the operation piece when the handle is displaced from the off position to the on position or from the on position to the off position. A switch device for opening and closing a fixed contact, wherein the signal contact mechanism portion is provided with a contact holding portion for holding the movable contact portion in a bent state.   The movable contact portion is provided with protruding pieces protruding outward at both ends in the width direction, and the contact holding portion is formed so as to hold only the protruding piece in the movable contact portion. The switch device according to claim 1. 3. The switch device according to claim 1, wherein the container body is provided with a restricting portion that abuts the operation piece at a limit position within a range in which the handle swings and restricts the swinging of the operation piece. .

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