JP4656073B2 - Switch device - Google Patents

Description

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

  Conventionally, a switch device 100 as shown in FIGS. 5A and 5B has been provided (for example, Patent Document 1). The switch device 100 includes two contact mechanism portions 101, a body 102 in which each contact mechanism portion 101 is accommodated, a handle 103 for on / off operation of the contact mechanism portion 101 that is swingably supported by the body 102, and A bipolar switching device comprising a reversing spring 104 comprising a coil spring that connects each contact mechanism 101 and the handle 103, and the reversing spring 104 is located when the handle 103 is in the off position. The contact mechanism 101 is turned off by bending in one direction, and the contact mechanism 101 is turned on by bending in the other direction when the handle 103 is in the on position. It is configured to bend in one direction or the other by elastic force by becoming the most compressed state when moving between the off positions. To have.

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

Also, a switch device 200 configured to obtain an electrical signal for confirming the on / off state of the two-contact mechanism unit 101 without using the switch device 100 and directly viewing the switch device is provided. Yes. As shown in FIG. 5C, the switch device 200 includes a contact mechanism 201 similar to the contact mechanism 101 and a coil spring that connects the contact mechanism 201 and the handle 103 to the switch 100 described above. And a reversing spring 202 made of a three-pole type switching device. That is, in this switch device 200, since the on / off of the two contact mechanism portions 101, 101 and the attached contact mechanism portion 201 is interlocked, the switch device is applied by applying a voltage to the contact mechanism portion 201. An electric signal for judging the on / off state of 200 can be obtained.
JP-A-7-296680 (see FIGS. 1 to 5)

  However, in the switch device 200 described above, in order to confirm the on / off state of the contact mechanism unit 101 (that is, the on / off state of the switch device 100), the contact mechanism unit 201 similar to the contact mechanism unit 101 is attached. Since the reversing spring 202 for turning on and off the contact mechanism 201 is attached, in addition to the reversing springs 104 and 104 for the contact mechanism 101 and 101 when operating the handle 103, the reversing for the contact mechanism 201 is performed. It is necessary to move the spring 202 from the bent state to the most compressed state.

  Therefore, the switch device 200 can obtain an electrical signal for determining the on / off state of the switch device 200, but the force (operation load) required to operate the handle 103 is greater than that of the switch device 100. As a result, there is a problem that the operability (operation feeling) of the handle 103 is deteriorated.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a switch device that can obtain an electric signal for determining an on / off state and can improve the operability of the handle. And

In order to achieve the above object, a power supply contact mechanism, a container housing the power contact mechanism, and a power contact mechanism supported swingably by the container are provided. And a reversing spring comprising a coil spring that connects the power contact mechanism and the handle, and the reversing spring bends in one direction when the handle is in the off position. The power contact mechanism is turned off, and when the handle is in the on position, the power contact mechanism is turned on by bending in the other direction, and the handle is between the on position and the off position. A switch device configured to bend in one direction side or the other direction side by elastic force by being in a most compressed state when moving, and a pair of devices housed in a container Signal fixed contact and signal from the handle An operating piece that protrudes in the direction toward the fixed contact and swings integrally with the handle, and a signal movable contact that contacts and separates from the signal fixed contact according to the movement of the handle to the on or off position. And a signal contact mechanism used for determining the on / off state of the switch device, the signal movable contact made of a strip-shaped metal plate, and a fixed portion that is press-fitted and fixed to the container at one end in the longitudinal direction; At the other end in the longitudinal direction, the movable contact portion can be bent with the fixed portion as a fulcrum, and is bent in a convex shape toward the handle between the fixed portion and the movable contact portion. And a pressing portion arranged on the track of the operation piece, and movable when the pressing portion is pressed 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. Contact point is a pair of signals As well as open and close the use stationary contact, when to shift the reversing spring in the most compressed state from the state of being bent in the one direction side, the operation piece is characterized in that it does not press the signal movable contact.

  According to a second aspect of the present invention, in the first aspect of the invention, the signal movable contact includes a pushing portion parallel to a direction substantially perpendicular to the press-fitting direction of the fixing portion between the fixing portion and the pressing portion. It is characterized by that.

  The invention of claim 3 is characterized in that, in the invention of claim 1 or 2, the operation piece includes an inclined portion that presses the pressing portion in a direction perpendicular to the tangential direction of the pressing portion.

  The invention of claim 4 is characterized in that, in the invention of claim 3, the pressing portion is bent substantially at a right angle.

According to the first aspect of the present invention, an effect is obtained that an electrical signal for determining the on / off state can be obtained by the signal contact mechanism section, and the signal contact mechanism section includes a pair of signal fixed contacts, The operation piece that swings integrally with the handle and the signal movable contact that is brought into and out of contact with the signal fixed contact according to the movement of the handle to the on position or the off position, The movable contact part that contacts and separates from the signal fixed contact is free to be bent with the fixed part at one end in the longitudinal direction as a fulcrum, and is bent convexly toward the handle between the fixed part and the movable contact part When the handle is pressed by the operating piece 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 portion opens and closes the pair of signal fixed contacts , and the reversing spring is Any of the above When shifting to the most compressed state from the bent state to the side of the operation piece since not to push the signal movable contactor and the handle compared to using reversing spring as in the prior art Therefore, the force required for the operation can be reduced, and hence the operability of the handle can be improved.

  According to invention of Claim 2, a fixed part can be easily press-fitted in a container body by pushing in a pushing part.

  According to the invention of claim 3, since the inclined portion of the operation piece pushes the pressing portion substantially perpendicularly to the tangential direction of the pressing portion, the displacement amount in the direction in which the movable contact portion contacts and separates from the signal fixed contact portion Thus, the contact pressure of the movable contact portion with respect to the signal fixed contact can be increased.

  According to the invention of claim 4, when the inclined portion of the operation piece pushes the pressing portion substantially perpendicularly to the tangential direction of the pressing portion, the displacement in the direction in which the movable contact portion contacts and separates from the signal fixed contact portion. The amount can be maximized, and the contact pressure of the movable contact portion to the signal fixed contact can be increased.

  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 left-right direction in FIG.

  As shown in FIGS. 2A and 2B, the switch device 1 of the present embodiment includes a power contact mechanism 2, a container 4 in which the power contact mechanism 2 is housed, and a container 4. A handle 5 for on / off operation of the power contact mechanism 2 that is swingably supported, and a reversing spring 3 comprising a coil spring that connects the power contact mechanism 2 and the handle 5 are provided. When the handle 5 is in the off position, the power contact mechanism 2 is turned off by bending in one direction (right direction), and in the other direction when the handle 5 is in the on position ( The power contact mechanism 2 is turned on by bending to the left (left) side, and the handle 5 is in the most compressed state when moving between the on position and the off position. It is comprised so that the bending operation | movement bent to the side or the left direction side may be performed.

  The switch device 1 protrudes in a direction from the handle 5 toward the signal fixed contacts 60a and 60a and swings integrally with the handle 5 to be accommodated in the container body 4. And a signal movable contact 61 that is brought into and out of contact with both signal fixed contacts 60a and 60a in accordance with the movement of the handle 5 to the on position or the off position. A signal contact mechanism 6 used for determination is provided.

  As shown in FIG. 1A, the power contact mechanism 2 includes a power fixed terminal plate 21 having a power fixed contact 20 and a power supply movable contact 22 that is in contact with and separated from the power fixed contact 20. The movable contact 23 for power supply and the common terminal plate 24 that contacts and supports the movable contactor 23 for power supply in a swingable manner.

  The power supply fixed terminal plate 21 is bent from a metal plate made of a conductive material such as copper, and has a contact holding piece 21a to which the power supply fixed contact 20 is fixed to the front surface, and extends backward from the contact holding piece 21a. Thus, it is formed in a substantially L shape integrally including a fixed terminal piece 21b used for connection to an external electric circuit or the like. The power source fixed contact 20 is made of a conductive metal material (for example, silver) having high welding resistance, environmental resistance, and heat resistance.

  Similarly to the power supply fixed terminal plate 21, the power supply movable contact 23 is bent from a metal plate made of a conductive material such as copper, and is opposed to each other with a distance similar to the outer diameter of the reversing spring 3. The pair of side pieces 23a, 23a and the pair of side pieces 23a, 23a are formed in a substantially U shape having a connecting piece 23b for connecting the rear ends of the pair of side pieces 23a, 23a, and are surrounded by the pair of side pieces 23a, 23a and the connecting piece 23b The spring holding portion 23c into which the rear end portion of the reversing spring 3 is fitted is provided in the space portion. A shaft hole (not shown) for pivotally supporting the movable contact 23 for power supply on the common terminal plate 24 is provided in the front-rear direction at a substantially central portion of the connecting piece 23b of the spring holding portion 23c. The shaft portion 24c of the common terminal plate 24, which will be described later, is inserted into the shaft hole, so that the movable contact 23 for power supply is swingably supported by the common terminal plate 24.

  Further, a contact holding piece 23d is integrally protruded from the front end portion of one (right side) side piece 23a of the spring holding portion 23c toward the right side, and the contact holding piece 23d has a predetermined elasticity. It is formed in a substantially square shape bent forward so as to have. A power supply movable contact 22 is fixed to the rear surface on the right end side of the contact holding piece 23d. The power source movable contact 22 is made of the same material as the power source fixed contact 20 described above.

  The common terminal plate 24 is bent from a metal plate made of a conductive material such as copper, like the fixed terminal plate 21 for power source, and a support piece 24a for swingably supporting the movable contact member 23 for power source. Further, it is formed in a substantially L shape integrally including a common terminal piece 24b that extends rearward from the support piece 24a and is used for connection to an external electric circuit or the like. The shaft portion 24c for supporting the movable contact 23 for power supply in a swingable manner is integrally projected from the right end edge of the support piece 24a toward the front.

  As shown in FIGS. 1D to 1F, the signal contact mechanism section 6 includes a pair of signal fixed contacts 60 and 60 and a signal movable contact 61. The signal fixed contact 60 is formed of a substantially round bar-shaped member made of a conductive material such as copper, for example, and includes a signal fixed contact 60a to which the signal movable contact 61 is contacted and separated, and a signal fixed contact 60a. It is formed in a substantially L shape integrally including a signal terminal portion 60b that extends rearward from the left end portion and is used for connection to an external electric circuit or the like.

  The signal movable contact 61 is bent from a metal plate made of a conductive and flexible material such as copper, for example, and as shown in FIG. 3A, one end in the longitudinal direction (FIG. 3A). The right end) of the fixing portion 61a is bent at a substantially right angle, and is fixed to the terminal block 42, which will be described later. The fixing portion 61a is the fulcrum at the other end in the longitudinal direction (the left end in FIG. 3A). A movable contact portion 61b that is freely bendable and contacts and separates from both signal fixed contacts 60a and 60a, and is bent upward in a convex shape between the fixed portion 61a and the movable contact portion 61b. And a pressing portion 61c to be pressed. Further, the fixing portion 61a is a pair of substantially rectangular locking pieces 61e cut and raised from the approximate center thereof, and a pair of protrusions projecting from both side edges in the short direction of the fixing portion 61a so as to sandwich the locking pieces 61e. The protrusion 61f is provided.

  In addition, between the fixed part 61a and the pressing part 61c, there is provided a pressing part 61d that is perpendicular to the press-fitting direction of the fixing part 61a, that is, parallel to the left-right direction. The fixing portion 61a can be easily pressed into the terminal block 42 by pressing the pressing portion 61d when press-fitting.

  The container body 4 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 4 has a substantially rectangular shape for attaching the handle 5 to both inner side surfaces in the short direction. Circular bearing holes 4a are respectively formed (see FIG. 1A). Further, as shown in FIG. 1 (d), a pair of spring pieces 4b, 4b spaced apart in the lateral direction are integrally projected on the outer side surface of the container body 4 in the longitudinal direction, and these spring pieces 4b. , 4b are used for mounting the switch device 1 to a mounting panel (not shown) or the like.

  On the other hand, the inside of the container 4 is divided into three in the short direction by partition walls 40 and 40 facing each other in the short direction of the container 4, and the space portions on both sides in the short direction are respectively the power supply contact mechanism parts 2. Is used as the power supply contact storage chambers 4A and 4A. The space surrounded by the partition walls 40 and 40 is used as a signal contact storage chamber 4B for storing the signal contact mechanism 6. As shown in FIG. 1 (d), a substantially rectangular parallelepiped terminal block 42 with left and right ends projecting forward is detachably provided on the bottom surface of the container 4 in the signal contact storage chamber 4B. The pair of signal fixed contacts 60a and 60a are exposed to the front in a pair of insertion holes (not shown) provided at one end (left end in FIG. 1D) of the terminal block 42 in the longitudinal direction. The signal terminal portions 60b and 60b of the signal fixed contacts 60 and 60 are inserted, and an insertion hole (right end in FIG. 1D) provided in the other end in the longitudinal direction of the terminal block 42 (right end in FIG. 1D). The fixed portion 61a of the signal movable contact 61 is press-fitted and fixed to (not shown). The fixing portion 61a is securely fixed when the distal end portion of the locking piece 61e and the pair of protruding portions 61f are locked to the locked portion (not shown) when press-fitted into the terminal block 42.

  That is, in the container 4, the power source contact mechanism unit 2 through which a large current such as a commercial power source flows and the signal contact mechanism unit 6 through which a very small current flows compared to the commercial power source are separated by the partition walls 40 and 40. This prevents the signal contact mechanism 6 from being affected by an arc or the like generated at the power mechanism contact 2.

  Further, as shown in FIG. 2B, the common terminal plate 24 of the power contact mechanism 2 is common to the portions corresponding to the power contact storage chambers 4 </ b> A and 4 </ b> A in the rear wall 43 of the container 4. A pair of power supply terminal insertion holes 43 a and 43 b for projecting the terminal piece 24 b and the fixed terminal piece 21 b of the fixed terminal plate 21 to the outside of the container body 4 are provided so as to be separated in the longitudinal direction of the container body 4. It has been. In addition, the signal terminal portions 60b and 60b of the pair of signal fixed contacts 60 and 60 are provided outside the device body 4 at the portion corresponding to the signal contact storage chamber 4B in the rear wall portion 43 of the device body 4, respectively. A pair of signal terminal insertion holes 43 c and 43 c for projecting are provided so as to be separated in the lateral direction of the container 4. In addition, as shown in FIG.2 (b), the rear wall part 43 of the container 4 is numbered in the vicinity of each insertion hole. That is, numbers 1 and 2 are assigned to the power supply terminal insertion holes 43a and 43b of the one power supply contact storage chamber 4A, respectively, and the power supply terminal insertion holes 43a and 43b of the other power supply contact storage chamber 4A are assigned. Are numbered 3 and 4, respectively, and signal signal insertion holes 43c and 43c of the signal contact storage chamber 4B are numbered 5 and 6, respectively.

  Furthermore, on the rear surface of the rear wall portion 43 of the container body 4, as shown in FIG. 2B, the common terminal piece 24b protruding from the power supply terminal insertion hole 43a and the power supply terminal insertion hole 43b protrude. A first insulating wall 44 for securing insulation with the fixed terminal piece 21b is integrally projected. Further, on the rear surface of the rear wall portion 43 of the container body 4, a pair of second insulating walls 45 for ensuring insulation between the common terminal pieces 24b and 24b protruding from the power supply terminal insertion holes 43a and 43a, respectively. , 45 and a pair of third insulating walls 46, 46 for securing insulation between the fixed terminal pieces 21b, 21b projecting from the power terminal insertion holes 43b, 43b, respectively, are integrally projected. . Further, on the rear surface of the rear wall portion 43, a connector portion 47 to which a signal connector (not shown) can be attached is provided around the signal terminal insertion holes 43c and 43c, as shown in FIG. Is provided.

  As shown in FIGS. 4 (a) to 4 (d), the handle 5 is supported swingably (rotatably) by the container body 4 with the rear end portion being housed in the container body 4. For example, it is a synthetic resin molded product, and is formed in a substantially rectangular parallelepiped shape with an open rear surface. On both outer side surfaces of the handle 5 in the short direction, a substantially circular shaft portion 5a that is swingably supported by the bearing hole 4a of the container body 4 is integrally projected. The inside of the handle 5 is divided into approximately three equal parts in the short direction by a pair of partition walls 50, 50 facing in the short direction of the handle 5, thereby corresponding to the power source contact storage chambers 4 A, 4 A of the container 4. A power supply contact storage chamber and a signal contact storage chamber corresponding to the signal contact storage chamber 4B of the container 4 are provided. Here, the distance between the pair of partition walls 50, 50 is set to be larger than the distance between the partition walls 40, 40 of the container body 4, and when the handle 5 is attached to the container body 4, The partition walls 40, 40 of the body 4 are positioned between the partition walls 50, 50. Thereby, the insulation distance between the contact mechanism part 2 for power supplies and the contact mechanism part 6 for signals accommodated in the container 4 becomes large, and the further insulation improvement is achieved.

  On the other hand, on the rear surface of the front wall portion 51 of the handle 5, a holding portion 52 a having a substantially cylindrical shape having an inner diameter similar to the outer diameter of the reversing spring 3 is formed in a portion corresponding to the power contact storage chamber. The tube portion 52 is integrally projected, and the handle 5 is connected to the reversal spring 3 by fitting the front end portion of the reversal spring 3 into the holding hole portion 52 a of the holding tube portion 52.

  In addition, a substantially square bar-like operation piece 53 for fixing the signal movable contact 61 is integrally projected at a portion corresponding to the signal contact storage chamber on the rear surface of the front wall portion 51 of the handle 5. . Here, the operation piece 53 is for placing the movable contact portion 61 b of the signal movable contact 61 at a predetermined position in the container body 4 by pressing the pressing portion 61 c of the signal movable contact 61. By this operation piece 53, the movable contact portion 61b is separated from the pair of signal fixed contacts 60a, 60a when the handle 5 is located at the off position, and when the handle 5 is located at the on position. It will be arranged at a position where it contacts the pair of signal fixed contacts 60a, 60a.

  Moreover, the lower end part which contacts the press part 61c of the operation piece 53 is provided with the inclined part 53a notched along the tangent direction of the press part 61c. Thus, when the operation piece 53 presses the pressing portion 61c, the pressing portion 61c can be pressed in a direction substantially perpendicular to the tangential direction of the pressing portion 61c by the inclined portion 53a, so that the movable contact portion 61b The displacement amount in the direction in which the pair of signal fixed contact portions 60a and 60a are in contact with and separated from each other can be increased, and therefore the contact pressure of the movable contact portion 61b with respect to the pair of signal fixed contacts 60a and 60a can be increased.

  In addition, by bending the pressing portion 61c at a substantially right angle as in the present embodiment, the amount of displacement of the movable contact portion 61b in the direction contacting and separating from the pair of signal fixed contact portions 60a, 60a is maximized. Therefore, the contact pressure of the movable contact portion 61b with respect to the pair of signal fixed contacts 60a, 60a can be further increased.

  The switch device 1 of the present embodiment is configured by the members described above, and the switch device 1 is assembled as follows. First, the terminal block 42 is attached to the bottom surface of the container 4 in the signal contact storage chamber 4B. Here, before the terminal block 42 is attached, the fixed portion 61 a of the signal movable contact 61 and the signal terminal portion 60 b of the signal fixed contact 60 are press-fitted and fixed to the terminal block 42 in advance. Next, the power contact mechanism units 2 and 2 are housed in the power contact housings 4A and 4A of the body 4, respectively. Here, the power contact mechanism 2 is stored in the power contact storage chamber 4A with the common terminal piece 24b protruding from the power terminal insertion hole 43a to the outside of the body 4. In addition, after the power supply fixed terminal plate 21 is stored in the power supply contact storage chamber 4A in a state where the fixed terminal piece 21b protrudes from the body 4 through the power supply terminal insertion hole 43b, the power supply movable contact 22 is turned on. The power source movable contact 23 is stored in the power source contact storage chamber 4 </ b> A in a state where it is opposed to the power fixed contact 20 and the shaft portion 24 c of the common terminal plate 24 is inserted into the bearing hole of the power source movable contact 23. Done in

  On the other hand, the handle 5 is inserted into the holding hole portion 52a of each holding cylinder portion 52 by inserting the front end portion of the reversing spring 3 and the shaft portion 5a is inserted into the bearing hole 4a of the vessel body 4 so Mounted freely. At this time, the rear end portion of each reversing spring 3 is fitted into the spring holding portion 23 c of each power source movable contact 23. Further, the operation piece 53 is disposed so that the pressing portion 61c of the signal movable contact 61 is positioned on the track of the rear end portion.

  As described above, the switch device 1 shown in FIGS. 2A and 2B is obtained. The switch device 1 has a circuit configuration as shown in FIG. In addition, the numbers 1-6 in the parentheses in FIG. 2C correspond to the numbers 1-6 attached to the rear surface of the rear wall portion 43 as shown in FIG.

  Hereinafter, the operation of the switch device 1 will be described with reference to FIGS. The states shown in FIGS. 1A and 1D show a state in which the switch device 1 is off. In this state, the handle 5 is rotated in the clockwise direction (the clockwise direction in FIG. 1A and the counterclockwise direction in FIG. 1D) and is located in the off position. At this time, as shown in FIG. 1 (a), the reversal spring 3 is stable in a state where the middle abdomen is bent so as to protrude to the left (bent in the right direction). The power source movable contact 23 of the power source contact mechanism unit 2 is located at a position where the power source movable contact 22 is separated from the power source fixed contact 20, whereby the power source contact mechanism unit 2 is turned off. It has become. Further, since the reversing spring 3 is in a bent state, a load is applied to the handle 5 so as to rotate clockwise.

  Thus, when the handle 5 is in the off position, as shown in FIG. 1 (d), the movable contact portion 61b of the signal movable contact 61 is separated from the pair of signal fixed contacts 60a and 60a. As a result, the signal contact mechanism 6 is turned off. Therefore, when a voltage is applied between the pair of signal fixed terminal portions 60b and 60b of the signal contact mechanism section 6 in this state, the signal contact mechanism section 6 is in the off state, and thus the low level (0 V) electrical signal. Is output.

  Here, as shown in FIG. 1A, the handle 5 is moved to the on position from the state in which the handle 5 is in the off position, that is, the left end side of the front surface of the handle 5 is pressed backward. 5 is rotated in the counterclockwise direction (counterclockwise direction in FIG. 1A, clockwise direction in FIG. 1D). The load is applied to the handle 5 in order to compress the reversing spring 3 because the whole is shifted from the bent state so as to project to the state along the axial direction (a state in which the whole is straight). Become.

  When the handle 5 is rotated counterclockwise, the reversing spring 3 is in a state along the axial direction as shown in FIG. In this state, since the reversing spring 3 is along the axial direction, the reversing spring 3 does not attempt to bend in either direction, and the balance is maintained. At this time, as shown in FIG. 1 (e), the rear end portion of the operation piece 53 is in contact with the pressing portion 61d of the signal movable contact 61, but since the pressing portion 61d is not pressed, the movable contact portion 61b. Is kept away from the pair of signal fixed contacts 60a, 60a. When the handle 5 is released before the reversing spring 3 is in the axial direction, the reversing spring 3 tries to extend from the state compressed by the handle 5 and thereby bends to the right (ie, bent to the right) (ie Then, the handle 5 is rotated clockwise and returned to the OFF state shown in FIG. 1A.

  As shown in FIG. 1B, when the reversing spring 3 is further rotated counterclockwise from the state in which the reversing spring 3 is along the axial direction, the reversing spring 3 is bent leftward by the handle 5. Be guided. For this reason, the reversing spring 3 performs a bending operation (ie, a reversing operation in which the bending direction is reversed) that is bent to the left side by an elastic force that is intended to extend from the compressed state. As a result, as shown in FIG. 1 (c), the reversing spring 3 rapidly bends to the left side, whereby the power source movable contact 23 is rotated clockwise and the power source movable contact 22 is It contacts the fixed contact 20 for power supply. As described above, since the bending operation of the reversing spring 3 is performed by the elastic force of the reversing spring 3, after giving the reversing spring 3 a chance to bend leftward, the handle 5 is not rotated counterclockwise. In both cases, the bending operation is automatically performed.

  During the bending operation of the reversing spring 3, as shown in FIG. 1 (f), when the operating piece 53 presses the pressing portion 61c, the signal movable contact 61 bends downward with the fixed portion 61a as a fulcrum. The movable contact portion 61b comes into contact with the pair of signal fixed contact portions 60a and 60a. That is, when the reversing spring 3 is shifted from the bent state as shown in FIG. 1 (a) to the most compressed state as shown in FIG. 1 (b) by the handle operation, the movable contact portion 61b is used for a pair of signals. The fixed contacts 60a and 60a are not brought into contact with each other, thereby preventing the operability of the handle 5 from being deteriorated. If the movable contact portion 61b comes into contact with the pair of signal fixed contacts 60a and 60a, the movement of the signal movable contact 61 is restricted by the pair of signal fixed contacts 60a and 60a. The drag due to the movement restriction of the movable signal contact 61, that is, the force that prevents the handle 5 from turning counterclockwise, is applied to the handle 5, but in the switch device 1 of the present embodiment, the reversing spring 3 Since the movable contact portion 61b contacts the pair of signal fixed contacts 60a and 60a during the bending operation (in other words, during the period in which the handle 5 is automatically moved by the reversing spring 3), the handle 5 is manually rotated. During the movement, the above-described drag is not received, and the above-described drag is received while the handle 5 is automatically rotated by the elastic force of the reversing spring 3. Therefore, when the user operates the handle 5 of the switch device 1, the operability of the handle 5 is not deteriorated because there is no influence by the above-mentioned drag. As a matter of course, a coil spring having a spring constant that prevents the reversing operation from being hindered by the above-described drag is used as the reversing spring 3.

  As described above, when the handle 5 is in the ON position, as shown in FIGS. 1C and 1F, the two power source contact mechanism portions 2 and 2 and the signal contact mechanism portion. Each of 6 is turned on. Therefore, when a voltage is applied between the signal fixed terminal portions 60b and 60b of the signal contact mechanism section 6 in this state, the signal contact mechanism section 6 is turned on. A signal is output.

  Then, as shown in FIG. 1C, the handle 5 is moved from the on position to the off position, that is, the handle 5 is turned clockwise by pressing the right end of the front surface of the handle 5 backward. When rotating in the direction (clockwise direction in FIG. 1 (c), counterclockwise direction in FIG. 1 (f)), the rotation direction is such that the reversing spring 3 protrudes rightward. Is a direction in which the entire state is shifted from the state bent in the left direction (the state bent leftward) to the state along the axial direction (a state straightened), the load necessary to compress the reversing spring 3 is a handle. It will take five.

  When the handle 5 is rotated clockwise, as shown in FIG. 1B, the reversing spring 3 is in a state along the axial direction. In this state, since the reversing spring 3 is along the axial direction, the reversing spring 3 does not attempt to bend in either direction, and the balance is maintained. In this state, the power source movable contact 23 is rotated counterclockwise, and the power source movable contact 22 is separated from the power source fixed contact 20.

  Here, if the handle 5 is released before the reversing spring 3 is in the state along the axial direction, the reversing spring 3 tries to extend from the state compressed by the handle 5 and thereby bends to bend to the left side ( That is, a return operation for returning to the original state without reversing the bending direction is performed, and the two power contact mechanism units 2 and 2 and the signal contact mechanism unit 6 are turned on.

  As shown in FIG. 1B, when the reversing spring 3 is further rotated clockwise from the state where the reversing spring 3 is along the axial direction, the reversing spring 3 is bent rightward by the handle 5. Be guided. For this reason, the reversing spring 3 performs a bending operation that bends to the right side by an elastic force that tends to extend from the compressed state (that is, a reversing operation that reverses the bending direction). As a result, as shown in FIG. 1A, the reversing spring 3 rapidly bends to the right side, and the handle 5 is positioned at the off position. In this way, the bending operation of the reversing spring 3 is performed by the elastic force of the reversing spring 3, so that after giving the reversing spring 3 an opportunity to bend in the right direction, the handle 5 is not rotated clockwise. In both cases, the bending operation is automatically performed.

  As described above, since the signal contact mechanism 6 is provided in the present embodiment, an electrical signal for determining the on / off state can be obtained. In addition, the signal contact mechanism 6 includes a pair of signal fixed contacts 60a and 60a, an operation piece 53 that swings integrally with the handle 5, and a pair of handles according to the movement of the handle 5 to the on position or the off position. The signal movable contact 61 is connected to and separated from the signal fixed contacts 60a and 60a, and the signal movable contact 61 includes a movable contact portion 61b that contacts and separates from the pair of signal fixed contacts 60a and 60a. A pressing portion 61c that is freely bent with the fixed portion 61a at one end in the direction as a fulcrum and is bent upwardly between the fixed portion 61a and the movable contact portion 61b is pressed by the operation piece 53. As a result, the movable contact portion 61b comes into contact with the pair of signal fixed contacts 60a, 60a, so that the force required to operate the handle 5 is reduced compared to the case where the reversing spring 202 is used as in the conventional example. Rukoto can, thus improving the operability of the handle 5.

  In addition, although the above example is an example provided with two power contact mechanism parts 2, the number of such power contact mechanism parts 2 is not limited to two, and increases or decreases depending on the use situation. You may make it.

(A) is a schematic sectional drawing which shows the case where the contact mechanism part for power supplies of the switch apparatus of this embodiment is OFF, (b) shows the case where the contact mechanism part for power supplies is located in the intermediate position of ON / OFF. (C) is a schematic sectional view showing a case where the power contact mechanism is turned on, (d) is a schematic sectional view showing a case where the signal contact mechanism is turned off, (e) FIG. 5 is a schematic cross-sectional view showing a case where the signal contact mechanism is located at an intermediate position between on and off, and (f) is a schematic cross-sectional view showing a case where the signal contact mechanism is on. (A) is schematic sectional drawing of a switch apparatus, (b) is a rear view of a switch apparatus, (c) is circuit explanatory drawing of a switch apparatus. (A) is a side view of the signal movable contact, and (b) is a front view of a fixed portion of the signal movable contact. (A) is an external view of a handle, (b) is a cross-sectional view taken along line AA ′, (c) is a cross-sectional view taken along line BB ′, and (d) is a side view of the handle. . (A) is schematic sectional drawing of the conventional switch apparatus, (b) is an external view of the conventional switch apparatus, (c) is a schematic sectional drawing of the other conventional switch apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Switch apparatus 2 Power supply contact mechanism part 3 Reversing spring 4 Body 5 Handle 53 Operation piece 6 Signal contact mechanism part 60a Signal fixed contact 61 Signal movable contact 61a Fixed part 61b Movable contact part 61c Press part

Claims (4)

A power contact mechanism, a housing in which the power contact mechanism is housed, a handle for on / off operation of the power contact mechanism that is swingably supported by the housing, a power contact mechanism and a handle And a reversing spring consisting of a coil spring that connects the power source and the reversing spring, when the handle is in the off position, bends in one direction to turn off the power contact mechanism and the handle is in the on position. The power contact mechanism is turned on by bending in the other direction when it is located at the position, and the handle is in the most compressed state when moving between the on position and the off position. A switch device configured to bend in one direction or the other in response to a force, and a pair of signal fixed contacts housed in the body and a signal from the handle toward the signal fixed contacts With a handle protruding in the direction It has an operation piece that swings on the body and a signal movable contact that is brought into and out of contact with the signal fixed contact in accordance with the movement of the handle to the on or off position, and is used to determine the on / off state of the switch device. The signal contact mechanism is provided with a signal contact mechanism, and the signal movable contact is made of a band-shaped metal plate. A movable contact portion that is freely movable to and away from a pair of signal fixed contacts, and a pressure that is bent in a convex shape toward the handle between the fixed portion and the movable contact portion and placed on the track of the operation piece And the movable contact portion opens and closes the pair of signal fixed contacts by the pressing portion being pressed 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. And reverse spring Any when shifting to the most compressed state from the state of being bent in direction of the operating piece is switch device characterized in that it does not press the signal movable contact.   2. The switch device according to claim 1, wherein the signal movable contact includes a pressing portion parallel to a direction perpendicular to a press-fitting direction of the fixing portion between the fixing portion and the pressing portion.   The switch device according to claim 1, wherein the operation piece includes an inclined portion that presses the pressing portion in a direction substantially perpendicular to a tangential direction of the pressing portion.   The switch device according to claim 3, wherein the pressing portion is bent at a substantially right angle.

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