JP6589452B2 - Micro switch and air conditioner - Google Patents

Description

  The present invention relates to a microswitch used for an electronic device or the like, and an air conditioner using the microswitch for detection of an air filter.

  Conventionally, microswitches that are switched to a conductive state or a non-conductive state by contact with a detection target are used in various electronic devices. For example, some air conditioners such as air conditioner indoor units have an automatic cleaning function for automatically cleaning an air filter for collecting dust. In such an air conditioner, a microswitch may be used to confirm that the air filter has been transferred to perform an automatic cleaning function and that the air filter has returned to a predetermined position after cleaning. In such an air conditioner, when two air filters are arranged side by side on the front side in the interior, two micro switches are usually required to detect the two air filters.

  However, providing two micro switches in an air conditioner causes an increase in the number of assembling steps and installation space of the micro switch and the number of parts of the air conditioner. In view of this, there has been proposed a filter detection component that can detect two air filters using one microswitch (see, for example, Patent Documents 1 and 2).

  The filter detection component of Patent Document 1 includes one micro switch and a lever opening / closing mechanism. The filter detection component uses a microswitch to detect that the two levers of the lever opening / closing mechanism are in contact with the side end surfaces of the two air filters and form a predetermined angle. And switch.

  The filter detection component of Patent Document 2 includes one microswitch and one seesaw mechanism. The filter detection component detects that the both ends of the seesaw mechanism are in contact with the front side of the two air filters and are displaced to the front side of the air filter with a micro switch. Switches.

Japanese Patent No. 5238647 Japanese Patent No. 5020208

  However, the filter detection components described in Patent Document 1 and Patent Document 2 require a lever opening / closing mechanism and a seesaw mechanism separately from the microswitch, so the configuration is large and complicated, and the manufacturing cost is high. Further, it is necessary to dispose the filter detection component between the areas where the two air filters are disposed, and it is necessary to secure a gap between the two air filters. For this reason, the area of each air filter is reduced, which leads to a reduction in the intake efficiency of the air conditioner.

  Therefore, an object of the present invention is to provide a microswitch that can detect two detection objects without being arranged between the two detection objects, can be manufactured at a low cost, and an air conditioner including the microswitch. It is to provide.

  The microswitch of the present invention includes a first terminal piece, a second terminal piece, a common piece, a first movable contact piece, a second movable contact piece, a first operating member, and a second operating member. Yes.

  The first terminal piece, the second terminal piece, and the common piece are attached to the base. The first terminal piece and the second terminal piece are arranged in the width direction of the base. The common piece is attached to the base so as to be separated from the first terminal piece and the second terminal piece in a direction perpendicular to the width direction of the base.

  The first movable contact piece and the second movable contact piece are arranged in the width direction of the base. One end of each of the first and second movable contact pieces is a free end, and the other end is attached to the common piece.

  The first operating member and the second operating member are arranged in the width direction of the base. The first operating member includes a state where the free end of the first movable contact piece is electrically connected to the first terminal piece by a pressing operation, and the free end of the first movable contact piece is connected to the first terminal piece. The state is switched between the state electrically disconnected from. The second movable contact piece has a state in which the free end of the second movable contact piece is electrically connected to the second terminal piece by a pressing operation, and the free end of the second movable contact piece is the second terminal. The state is switched between a state electrically disconnected from the piece.

  In this configuration, the first terminal piece and the second terminal piece are switched between the conductive state and the non-conductive state according to the combination of the states of the first operating member and the second operating member. For this reason, if the first operation member is pressed by the first detection object to switch the state, and the second operation member is pressed by the second operation object to switch the state, Two detection objects can be detected with a single microswitch. In addition, since the two operation members are mounted side by side in the width direction of the base, the micro switch can detect two detection objects without being arranged in the gap between the two detection objects. Furthermore, the first terminal piece, the second terminal piece, and the common piece are attached to the base, and the first movable contact piece and the second movable contact piece are attached to the common piece, Since the microswitch can be manufactured by providing the operating member and the second operating member, the configuration is simple and the microswitch can be easily manufactured.

  The common piece, the first movable contact point, and the second movable contact piece are preferably integrally formed of a conductive material. In this configuration, the number of members constituting the microswitch is smaller, and the structure is simpler and easier to manufacture.

  The microswitch described above may further include a third terminal piece arranged in the width direction of the base with the first terminal piece and the second terminal piece and attached to the base in a state of being connected to the common piece. Good. If the third terminal piece is provided in this way, the state between the first terminal piece and the third terminal piece is switched between a conductive state and a non-conductive state according to the state of the first operating member, Depending on the state of the second operating member, the second terminal piece and the third terminal piece are switched between a conductive state and a non-conductive state. Therefore, two detection objects can be individually detected by the first operation member and the second operation member.

  Each of the operation members described above is a lever that rotates around an axis along the width direction of the base, and by this rotation, the free end of the movable contact piece is electrically connected to the terminal piece, and the movable contact It is preferable to switch the state between a state where the free end of the piece is electrically disconnected from the terminal piece. The microswitch configured as described above can widen a region in which a detection target can be detected only by lengthening the lever without changing the size of the portion excluding the lever. For this reason, the part except the lever of a microswitch can be comprised small, and the space required for arrangement | positioning can be made small.

  Further, the first terminal piece and the second terminal piece protrude on one side across the rotation shaft of the first operation member and the second operation member, and the first operation member on the other side. It is preferable that the distal end of the first projection and the distal end of the second operation member protrude. With this configuration, when a detection object that is transferred from the inside of the electronic device toward the vicinity of the microswitch is detected by the microswitch arranged inside the electronic device, the terminal piece of the microswitch is The detection object can be directed in the direction in which it is transferred. Accordingly, the connection wiring connected to the microswitch can be drawn out in the direction in which the detection target is transferred, that is, inside the electronic device, and the connection wiring can be easily handled.

  Further, the microswitch described above preferably further includes a sheet between each operation member and each movable contact piece, and further, around a region pushed into the first movable contact piece side of the sheet, and a second It is preferable that a bend is provided around a region pushed into the movable contact side. This bending is a part that absorbs expansion and contraction of the surface of the sheet. By providing such a sheet, the waterproofness and dustproofness of each movable contact piece and each terminal piece can be improved. Further, by providing the sheet with a bend, the bend can be extended when the movable contact piece is pushed through the sheet, and an unnecessary deformation or stress can be hardly generated on the sheet. As a result, the sheet is less likely to be displaced or damaged.

  Moreover, the above-mentioned sheet | seat may be provided with the projection part in the area | region pushed into each movable contact piece side. If comprised in this way, the area which a sheet | seat and a movable contact piece contact can be made small, and a deformation | transformation can be produced in a movable contact piece large and reliably.

  The first operating member is in contact with the first and second air filters configured to be transportable through the predetermined position and the first air filter at the predetermined position, and the second air at the predetermined position. And a microswitch arranged so that the second operation member contacts the filter, and depending on the state where each operation member contacts the air filter, the conductive state between each movable contact piece and each terminal piece or non-contact The air conditioner can also be configured to switch the conduction state. In this way, even if two air filters are arranged at a narrow interval, the two air filters can be detected by one microswitch, and the intake efficiency of the air conditioner can be increased.

  According to the present invention, two detection objects can be detected by a single microswitch without being arranged in the gap between the two detection objects. In addition, the microswitch can have a simple configuration, and the microswitch can be easily manufactured.

It is a perspective view which shows the external appearance of the microswitch which concerns on 1st Embodiment. It is a fragmentary perspective view which shows the periphery structure of the terminal piece with which the microswitch which concerns on 1st Embodiment is provided. It is the disassembled perspective view seen in the state which decomposed | disassembled the microswitch which concerns on 1st Embodiment. It is a fragmentary perspective view which shows the sheet | seat with which the microswitch concerning 1st Embodiment is provided. It is side surface sectional drawing which shows typically the operation state of the microswitch which concerns on 1st Embodiment. It is a schematic diagram which shows the usage example of the microswitch which concerns on 1st Embodiment. It is a fragmentary perspective view which shows the periphery structure of the terminal piece with which the microswitch which concerns on 2nd Embodiment is provided. It is a schematic diagram which shows the sheet | seat with which the microswitch which concerns on 2nd Embodiment is provided.

  The microswitch 10A according to the first embodiment of the present invention will be described below. FIG. 1 is a perspective view showing the appearance of the microswitch 10A.

  The microswitch 10A includes a first operating member 11A, a second operating member 12A, a cover 13A, a base 14A, a first terminal piece 21A, a second terminal piece 22A, and a third terminal piece 23A. ing.

  The operation member 11A, the operation member 12A, the cover 13A, and the base 14A are each formed by molding an insulating resin. The terminal pieces 21A, 22A, and 23A are each made of a conductive material that is insert-molded on the base 14A.

  The cover 13A is attached to the base 14A and forms a box with the base 14A. The base 14A and the cover 13A are substantially rectangular when viewed from the side on which the cover 13A is attached to the base 14A. Hereinafter, the direction in which the cover 13A is attached to the base 14A is referred to as a thickness direction.

  The first to third terminal pieces 21A, 22A, and 23A are arranged along one side of the base 14A viewed from the thickness direction, and project in a direction orthogonal to the side surface of the base 14A. The terminal piece 23A is disposed between the terminal piece 21A and the terminal piece 22A. Hereinafter, the direction in which the terminal pieces 23A and the terminal pieces 22A are sequentially arranged with respect to the terminal piece 21A is referred to as a width direction. Further, the direction in which the terminal pieces 21A, 22A, 23A protrude from the base 14A is defined as the terminal direction.

  The first and second operation members 11A and 12A are arranged in the width direction and attached to the cover 13A. One ends of the operation members 11A and 12A protrude in the thickness direction from the cover 13A. The other ends of the operation members 11A and 12A are pivotally supported by the cover 13A along an axis parallel or substantially parallel to the width direction. The operation members 11A and 12A are held in a state of protruding from the cover 13A in the thickness direction when no external force is received. In this state, the operation members 11A and 12A are inclined in the direction opposite to the terminal direction. In this state, the operation members 11A and 12A are configured to rotate in a direction opposite to the terminal direction when an external force is applied by a pressing operation from the terminal direction or the thickness direction.

  FIG. 2A is a partial perspective view showing the peripheral structure of the base 14A and the terminal pieces 21A, 22A, and 23A. FIG. 2B is a partial perspective view showing the peripheral structure of the terminal pieces 21A, 22A, 23A in a state where the base 14A is removed.

  In addition to the configuration described above, the microswitch 10A further includes a first movable contact piece 31A, a second movable contact piece 32A, and a common piece 33A. The third terminal piece 23A described above is configured as a part of the common piece 33A.

  The base 14A includes housing portions 15A and 16A that open in the thickness direction. The accommodating portion 15A is provided at a position facing the operation member 11A. The accommodating portion 16A is provided at a position facing the operation member 12A. That is, the accommodating portion 15A and the accommodating portion 16A are arranged in the width direction. Here, the inner bottom surface of each of the accommodating portions 15A and 16A is formed in two steps having different positions (depths) in the thickness direction, the step region on the terminal direction side is deeper, and the step on the side opposite to the terminal direction is formed. The area is shallower.

  21 A of 1st terminal pieces are shape | molded by the reverse L-shape seeing from the thickness direction by giving a punching and punching a strip-shaped or flat plate-shaped electrically-conductive material. Further, the terminal strip 21A is bent in the thickness direction by shifting the vicinity of the center in the thickness direction, thereby shifting the direction in which both ends extend in the thickness direction. One end of the terminal piece 21A protrudes from the base 14A, and the other end of the terminal piece 21A is embedded in the base 14A. And the terminal exposure part 24A exposed from the inner bottom face of the accommodating part 15A is provided in the front-end | tip of the part embedded in the base 14A in the terminal piece 21A.

  22 A of 2nd terminal pieces are shape | molded by the L shape seeing from the thickness direction by giving a press work to a strip-shaped or flat plate-shaped electrically-conductive material and punching. Further, the terminal piece 22A is bent in the thickness direction by shifting the vicinity of the center in the thickness direction, thereby shifting the direction in which both ends extend in the thickness direction. One end of the terminal piece 22A protrudes from the base 14A, and the other end of the terminal piece 22A is embedded in the base 14A. A terminal exposed portion 25A exposed from the inner bottom surface of the accommodating portion 16A is provided at the tip of the portion embedded in the base 14A in the terminal piece 22A.

  The common piece 33A is formed in a T shape when viewed from the thickness direction by stamping a strip-shaped or flat plate-shaped conductive material by stamping. The common piece 33A has a flat plate shape when viewed from the width direction. The common piece 33A is integrally formed with the terminal piece 23A described above. Hereinafter, the terminal piece 23A is a portion extending linearly from a portion protruding from the base 14A in the common piece 33A. Further, a portion extending orthogonally from one end of the terminal piece 23A in the common piece 33A is defined as an orthogonal portion 34A.

  The terminal piece 23A is provided so as to pass through a position between the two accommodating portions 15A and 16A inside the base 14A. One end of the orthogonal part 34A is exposed on the inner bottom surface of the accommodating part 15A. The position at which the orthogonal portion 34A is exposed at the inner bottom surface of the housing portion 15A is opposite to the terminal direction with respect to the position at which the terminal exposed portion 24A of the first terminal piece 21A is exposed at the inner bottom surface of the housing portion 15A. Separated to the side. The other end of the orthogonal part 34A is exposed on the inner bottom surface of the accommodating part 16A. The position where the orthogonal portion 34A is exposed on the inner bottom surface of the housing portion 16A is opposite to the terminal direction with respect to the position where the terminal exposed portion 25A of the second terminal piece 22A is exposed on the inner bottom surface of the housing portion 16A. Separated to the side.

  The movable contact piece 31A is formed as a strip-shaped conductor piece and disposed in the accommodating portion 15A. One end of the movable contact piece 31A is attached to a surface exposed in the thickness direction of the orthogonal portion 34A so as to be electrically connected to the common piece 33A. The other end of the movable contact piece 31A is a free end facing the terminal exposed portion 24A of the terminal piece 21A with a gap in the thickness direction.

  The movable contact piece 32A is formed as a strip-shaped conductor piece and disposed in the accommodating portion 16A. One end of the movable contact piece 32A is attached to a surface exposed in the thickness direction of the orthogonal portion 34A so as to be electrically connected to the common piece 33A. The other end of the movable contact piece 32A is a free end facing the terminal exposed portion 25A of the terminal piece 22A with a gap in the thickness direction.

  Therefore, the movable contact piece 31A and the movable contact piece 32A are arranged in the width direction. The movable contact piece 31A and the movable contact piece 32A are electrically connected to each other via the common piece 33A and are also electrically connected to the terminal piece 23A. The movable contact pieces 31A and 32A can be attached to the common piece 33A by, for example, welding, pressure bonding, soldering, fitting, or the like.

  FIG. 3 is an exploded perspective view of the microswitch 10A as seen in an exploded state.

  In addition to the configuration described above, the microswitch 10A further includes a seat 17A and coil springs 18A and 19A.

  The sheet 17A is made of water-resistant resin or the like. The sheet 17A is provided so as to cover the thickness direction side of the base 14A. The sheet 17A enhances the waterproofness and dustproofness of the microswitch 10A by closing the accommodating portions 15A and 16A. The sheet 17A is fixed by being sandwiched between the base 14A and the cover 13A, for example. Further, the rib 41A protrudes toward the seat 17A from a position surrounding the outer sides of the accommodating portions 15A and 16A in the base 14A. The rib 41A partially pushes in the sheet 17A, thereby increasing the adhesion between the cover 13A and the base 14A and the sheet 17A. By providing such a rib 41A, the dustproof and waterproof properties of the microswitch 10A can be further improved.

  The cover 13A is provided with openings 42A and 43A. The opening 42A is provided so as to face the accommodating portion 15A of the base 14A described above. The opening 43A is provided so as to oppose the accommodating portion 16A of the base 14A described above. The cover 13A and the base 14A include, for example, a total of four square annular locking portions 50A provided two on the side surface of the cover 13A and a total of four claws 51A provided two on the side surface of the base 14A. They are fixed to each other by meshing.

  11 A of 1st operation members are lever shape, and are hold | maintained in the state which the one end side protrudes in the thickness direction from the opening part 42A of 13 A of covers. Further, the other end side of the first operation member 11A is attached to the cover 13A while being accommodated in the opening 42A of the cover 13A. A portion attached to the cover 13A of the first operating member 11A is configured as a cam 46A. The second operation member 12A has a lever shape and is held in a state where one end side protrudes from the opening 43A of the cover 13A in the thickness direction. The other end side of the second operation member 12A is attached to the cover 13A in a state of being accommodated in the opening 43A of the cover 13A. The part attached to the cover 13A of the second operating member 12A is configured as a cam 47A. The operation members 11A and 12A are pivotally supported by the cover 13A, for example, by inserting a cylindrical shaft portion 49A provided in the cover 13A into a shaft hole 48A provided in the cams 46A and 47A.

  The coil spring 18A is attached to the operation member 11A and biases the operation member 11A so that the operation member 11A is held in a state of protruding from the cover 13A in the thickness direction. The coil spring 19A is attached to the operation member 12A and biases the operation member 12A so that the operation member 12A is held in a state of protruding from the cover 13A in the thickness direction. For example, the coil springs 18A and 19A are inserted into groove portions (not shown) provided on the cams 46A of the operation members 11A and 12A, and pressure is applied between the both end portions between the operation members 11A and 12A and the cover 13A. The operation members 11A and 12A are biased by being locked to each.

  These members constitute the microswitch 10A. The microswitch 10A covers the operating members 11A and 12A having the movable contact pieces 31A and 32A attached thereto by welding or the like and the coil springs 18A and 19A attached to the base 14A in which the terminal pieces 21A, 22A and 23A are insert-molded. It can be manufactured by attaching it to 13A and then attaching the cover 13A to the base 14A with the sheet 17A in between. Therefore, the microswitch 10A can be easily manufactured with a small number of steps. Further, for example, since the movable contact pieces 31A and 32A have a flat plate shape, they can be easily formed without requiring bending or the like, and the shape accuracy is high. Moreover, since the sheet 17A is fixed by being sandwiched between the base 14A and the cover 13A, the assembly is easy.

  FIG. 4 is a perspective view showing a cross-section of the main part of the sheet 17A. The sheet 17A is provided with bellows 71A and 72A in an annular shape. In addition, in the region surrounded by the bellows portions 71A and 72A in the sheet 17A, first protrusion portions 73A and 74A that protrude on the side opposite to the thickness direction, that is, the base 14A side, are provided. The bellows portions 71A and 72A have an annular shape when viewed from the thickness direction, and have a wave-like bending that repeatedly bends up and down in the thickness direction when viewed in cross section. These bellows portions 71A and 72A absorb the expansion and contraction of the surface of the sheet 17A, and expand or contract more than the surroundings. Therefore, the protrusions 73A and 74A surrounded by the bellows portions 71A and 72A are elastically displaceable in the vertical direction of the sheet 17A with the expansion and contraction of the bellows portions 71A and 72A.

  FIG. 5 is a side sectional view schematically showing an operation when the microswitch 10A is used. FIG. 5 shows a cross section traversing the operation member 11A. Hereinafter, the operation of the operation members 11A and 12A will be described using the operation member 11A as a representative. Although description of the operation related to the operation member 12A is omitted, the operation related to the operation member 12A is the same as the operation related to the operation member 11A.

  In the sheet 17A, the cam 46A of the operation member 11A described above faces the position on the thickness direction side of the protrusion 73A. The protrusion 73A faces the vicinity of the center of the movable contact piece 31A. Here, the cam 46A of the operation member 11A has a substantially circular cross-sectional shape perpendicular to the rotation shaft 53A of the operation member 11A, and a part of the outer periphery is cut off in a substantially linear shape. The cam 46A may have a cross-sectional shape other than the above. The cross-sectional shape of the cam 46A is determined by determining the distance from the rotation shaft 53A of the operating member 11A to the surface of the cam 46A (hereinafter referred to as the cam radius) at several points on the surface of the cam 46A. It is good to set it so that it connects with a curve. For example, the cam radius at the first position where the seat 17A contacts the cam 46A in a state where the operating member 11A is not receiving external force is from the rotation shaft 53A of the cam 46A to the seat 17A in the undeformed state. It can be set to substantially match the interval. Further, the cam radius at the second position where the sheet 17A contacts the cam 46A at the angle of the operation member 11A at which the microswitch 10A is switched between the conductive state and the non-conductive state causes the movable contact piece 31A to contact the terminal piece 21A. Therefore, it can be set based on the amount of pushing required. Further, the cam radius at the third position where the sheet 17A contacts the cam 46A at the angle of the operation member 11A at which the movable contact piece 31A is most pushed is set based on the maximum pushing amount of the movable contact piece 31A. be able to.

  In the example shown in FIG. 5, when the detection target object 101A has not arrived at the predetermined position, the operation member 11A is held in a state protruding from the cover 13A in the thickness direction, and at the predetermined position at which the detection target object 101A arrives. Overlapping (see dashed line). When the operating member 11A is in a broken line state, the following states (1) to (3) are obtained.

(1) The cam 46A is in contact with the sheet 17A at the outer peripheral linear portion, but does not push the sheet 17A into the base 14A side.

(2) The protrusion 73A of the sheet 17A does not push the movable contact piece 31A.

(3) The movable contact piece 31A extends substantially parallel to the base 14A and does not contact the terminal exposed portion 24A of the terminal piece 21A.

  Therefore, unless the detection object 101A has arrived at the predetermined position, the movable contact piece 31A and the terminal piece 21A are separated from each other and do not conduct.

  When the detection target object 101A arrives at a predetermined position, the detection target object 101A comes into contact with the operation member 11A, so that the operation member 11A receives a pressing operation and is in the same direction as the detection target object 101A arrives. It turns.

  Here, the tip 52A of the operation member 11A protrudes on the opposite side of the terminal pieces 22A, 22B, and 22C across the rotation shaft 53A. That is, the operation member 11A is held in a state where it is inclined to the opposite side to the terminal direction. Therefore, the operation member 11A has a direction in which the detection object 101A arrives not only when the detection object 101A comes from the terminal direction but also when the detection object 101A comes from the thickness direction. Will rotate in the same direction.

  When the operation member 11A rotates as described above, the cam 46A first contacts the sheet 17A at the corner portion between the linear portion of the outer periphery and the arc portion, and then the sheet at the arc portion of the outer periphery. It comes in contact with 17A. While the cam 46A is in contact with the sheet 17A at the corner portion between the outer peripheral linear portion and the arc portion, the pushing amount of the sheet 17A by the cam 46A increases as the operation member 11A rotates. While the cam 46A is in contact with the sheet 17A at the outer peripheral arc portion, the pushing amount of the sheet 17A by the cam 46A remains constant even if the operation member 11A rotates.

  More specifically, first, when the operation member 11A comes into contact with the detection object 101A and starts to rotate, the corner portion between the outer peripheral straight line portion and the outer peripheral arc portion of the cam 46A comes into contact with the sheet 17A. The corner portion pushes the sheet 17A toward the base 14A. At this time, the bellows portion 71A gradually extends, and unnecessary deformation and stress are unlikely to occur in the sheet 17A except for the bellows portion 71A. Therefore, by providing the bellows portion 71A, the sheet 17A can be less likely to be displaced or damaged.

  When the rotation of the operation member 11A further advances and the protrusion 73A of the sheet 17A contacts the vicinity of the center of the movable contact piece 31A in the longitudinal direction, the protrusion 73A pushes the movable contact piece 31A toward the base 14A side. The movable contact piece 31A is deformed so as to bend toward the base 14A side. Since the protrusion 73A provided on the sheet 17A comes into contact with the movable contact piece 31A, by providing the protrusion 73A on the sheet 17A, the movable contact piece 31A can be separated from the surface of the sheet 17A on the base 14A side, and is movable. The contact area between the contact piece 31A and the sheet 17A can be reduced. As a result, the movable contact piece 31A can be largely and reliably deformed.

  When the operation member 11A rotates in the direction opposite to the terminal direction and the angle with respect to the base 14A exceeds a predetermined angle (θa in the figure), the tip of the movable contact piece 31A becomes the terminal exposed portion 24A of the terminal piece 21A. The movable contact piece 31A and the terminal piece 21A are electrically connected.

  When the operation member 11A further rotates, the cam 46A comes into contact with the seat 17A at the arc portion on the outer periphery. Then, even if the operation member 11A further rotates, the sheet 17A and the movable contact piece 31A are not further pushed into the cam 46A. For this reason, it is difficult for the movable contact piece 31A to be excessively deformed and to fail. Therefore, this micro switch 10A can extremely widen the angle range in which the operation member 11A rotates. For example, the operation member 11A can be rotated until the operation member 11A is substantially parallel to the base 14A.

  As described above, in the micro switch 10A, the first operation member 11A is rotated in contact with the detection target object 101A, whereby the movable contact piece 31A and the terminal are between the movable contact piece 31A and the terminal piece 21A. The non-conducting state in which the exposed portion 24A is separated and electrically disconnected is switched to the conductive state in which the movable contact piece 31A and the terminal exposed portion 24A are in contact and electrically connected. Conversely, when the detection object 101A moves away from the predetermined position, the operation member 11A rotates around the opposite direction to that when the detection object 101A arrives at the predetermined position. The movable contact piece 31A and the terminal exposed portion 24A are electrically separated from the conductive state in which the movable contact piece 31A and the terminal exposed portion 24A are in contact and electrically connected between 31A and the terminal piece 21A. It will switch to the disconnected non-conduction state.

  The operation related to the second operating member 12A is the same as the operation related to the first operating member 11A. That is, when the second operating member 12A rotates in contact with the object to be detected, the movable contact piece 32A is moved from the non-conductive state where the movable contact piece 32A and the terminal exposed portion 25A are separated and electrically disconnected. And the terminal exposed portion 25A are in contact with each other and switched to the electrically connected state. Conversely, when the detection object moves away from the predetermined position, the operation member 12A rotates around the opposite direction to that when the detection object arrives at the predetermined position. From the conductive state in which the terminal exposed portion 25A is in contact and electrically connected, the movable contact piece 32A and the terminal exposed portion 25A are separated and electrically switched to a non-conductive state.

  Therefore, in the microswitch 10A, the first terminal piece 21A and the second terminal piece 22A are in a conductive state or a non-conductive state depending on the combination of the contact states of the operation members 11A and 12A with the detection target. Switch to state. Specifically, if both the operation member 11A and the operation member 12A are in contact with the object to be detected, that is, both the operation member 11A and the operation member 12A are rotated to the opposite side to the terminal direction. In this case, the terminal piece 21A and the terminal piece 22A are electrically connected. Conversely, if either one or both of the operating member 11A and the operating member 12A are not in contact with the detection target, that is, either one or both of the operating member 11A and the operating member 12A is in the thickness direction. The terminal piece 21A and the terminal piece 22A are not electrically connected. Thus, the micro switch 10A can detect two detection objects arranged in the vicinity of the operation members 11A and 12A alone.

  In this example, in addition to the first and second terminal pieces 21A and 22A, the third terminal piece 23A is provided so as to be electrically connected to the first and second movable contact pieces 31A and 32A. Accordingly, the first terminal piece 21A and the third terminal piece 23A are switched between the conductive state and the non-conductive state according to the contact state of the first operating member 11A with the detection target. Further, the second terminal piece 22A and the third terminal piece 23A are switched between a conductive state and a non-conductive state according to the contact state of the second operation member 12A with the detection target. Therefore, the micro switch 10A can individually detect two detection objects arranged in the vicinity of the operation members 11A and 12A. Note that the third terminal piece 23A is not an essential configuration of the present invention, and the terminal piece 23A may be omitted and only the terminal pieces 21A and 22A may be provided.

  Further, the microswitch 10A can lengthen only the operation members 11A and 12A without changing the size of the portions excluding the operation members 11A and 12A. For this reason, the area where the detection target object 101A can be detected can be expanded, and the detection target object 101A arrives even if the detection target object 101A is misaligned in a direction (vertical direction) perpendicular to the arrival direction. Can be detected with high sensitivity.

  Here, a specific use situation of the microswitch 10A will be exemplified. FIG. 6 is a schematic diagram showing an example of use of the microswitch 10A.

  Below, the case where air filters (detection target) 101A and 102A are detected using the micro switch 10A in the air conditioner 100A having an automatic cleaning function will be described. When performing the automatic cleaning function of the air filters 101A and 102A in the air conditioner 100A, the air filters 101A and 102A are transferred along the path inside the air conditioner 100A, thereby cleaning the air filters 101A and 102A (removing dust). ) Is performed. When the execution of the automatic cleaning function ends, the air filters 101A and 102A are transferred so as to return to the predetermined positions. The micro switch 10A is provided in the terminal part of the path along which the air filters 101A and 102A are transferred inside the air conditioner 100A. The micro switch 10A detects whether or not the two air filters 101A and 102A are both disposed adjacent to a predetermined position.

  More specifically, the microswitch 10A is a portion where the edges extending in the transfer direction (see the black arrows in FIG. 6A) of the two air filters 101A and 102A arranged at predetermined positions are adjacent to each other. (See FIG. 6B). Further, the operation members 11A and 12A of the micro switch 10A are set to have an arrangement interval and a width dimension so as to make a one-to-one contact with the edges of the air filters 101A and 102A arranged at predetermined positions. Therefore, the operation members 11A and 12A are held in a state of protruding in the thickness direction when the corresponding air filter 101A or air filter 102A has not arrived at the predetermined position. The operation members 11A and 12A rotate in the same direction as the transfer direction of the air filters 101A and 102A when the corresponding air filter 101A or air filter 102A arrives at a predetermined position. Then, the micro switch 10A detects whether or not the operation members 11A and 12A are both rotated in the transfer direction of the air filters 101A and 102A.

  By arranging the micro switch 10A in the air conditioner 100A in this way, whether or not the two air filters 101A and 102A are adjacent to each other at a predetermined position can be obtained by using the micro switch 10A alone. Can be detected. Further, the microswitch 10A can be disposed so as to face the front or back of each of the two air filters 101A and 102A that have arrived at a predetermined position, and is disposed in the gap between the two air filters 101A and 102A. There is no need to do. For this reason, it is not necessary to provide an extra space for arranging the microswitch 10A between the two air filters 101A and 102A. Therefore, in this air conditioner 100A, the gap between the two air filters 101A and 102A can be made extremely small, and the area of each of the two air filters 101A and 102A can be increased. As a result, the intake efficiency of the air conditioner 100A can be increased.

  In the microswitch 10A, the terminal pieces 21A, 22A, and 23A extend in the opposite direction with respect to the transfer direction of the two air filters 101A and 102A. Therefore, the connection wiring (not shown) connected to the microswitch 10A can be drawn out from the microswitch 10A in the direction in which the two air filters 101A and 102A arrive at the predetermined positions. For this reason, when the micro switch 10A is arranged on the inner side (heat exchanger side) of the air filters 101A and 102A in the air conditioner 100A, the connection wiring is directed toward the inner side (heat exchanger side) of the air conditioner 100A. It will be drawn from 10A. Therefore, the connection wiring of the micro switch 10A can be wired by a simple route without being complicatedly routed to the circuit board disposed inside the air filter. Further, if the micro switch 10A is arranged on the inner side (heat exchanger side) of the air filters 101A and 102A in the air conditioner 100A, the micro switch 10A and the connection wiring are arranged on the outer side of the air filters 101A and 102A in the air conditioner 100A. Therefore, the air conditioner 100A can be configured more compactly.

  As described above, the microswitch 10A according to this example can be configured and used. In the microswitch 10A shown in this example, when the operation members 11A and 12A are held in a state of protruding in the thickness direction, there is no gap between the terminal pieces 21A and 22A and the movable contact pieces 31A and 32A. An example is shown in which the terminal pieces 21A and 22A and the movable contact pieces 31A and 32A are conductive when the operation members 11A and 12A are turned in the direction opposite to the terminal direction. , 12A is held in a state protruding in the thickness direction, the terminal pieces 21A, 22A and the movable contact pieces 31A, 32A are brought into conduction, and the operation members 11A, 12A are rotated in a direction opposite to the terminal direction. If it exists, it can also comprise so that terminal piece 21A, 22A and movable contact piece 31A, 32A may become non-conduction. In this case, only when there is no object to be detected in the vicinity of the operation members 11A and 12A, the terminal piece 21A and the terminal piece 22A are electrically connected, and detection is performed in the vicinity of one or both of the operation members 11A and 12A. Only when there is an object, the terminal piece 21A and the terminal piece 22A are non-conductive.

  In this example, the bellows portions 71A and 72A and the projection portions 73A and 74A are provided on the sheet 17A. However, the bellows portions 71A and 72A and the projection portions 73A and 74A are not essential configurations of the present invention, and The sheet 17A may be configured by omitting one or both of the portions 71A and 72A and the protruding portions 73A and 74A. Further, the sheet 17A itself is not an essential configuration of the present invention, and the operation member 11A, 12A and the movable contact piece 31A, 32A may be in direct contact with each other without the sheet 17A.

  In addition, the shape and material of each part are not limited to the above example, and an appropriate shape and material can be used. For example, the operation members 11A and 12A are not limited to the lever shape, and may have other shapes such as a push button.

  Next, a microswitch 10B according to a second embodiment of the present invention will be described. Hereinafter, the same components as those of the first embodiment will be described with the reference numerals used in the first embodiment changed from “A” to “B”. Further, the configuration different from that of the first embodiment will be mainly described, and the description of the same configuration as that of the first embodiment will be omitted.

  FIG. 7A is a partial perspective view showing the peripheral structure of the base 14B and the terminal pieces 21B, 22B, and 23B in the microswitch 10B. FIG. 7B is a partial perspective view showing the peripheral structure of the terminal pieces 21B, 22B, and 23B except for the base 14B.

  The base 14B includes an accommodating portion 15B that is formed in an E shape when viewed from the thickness direction. The microswitch 10B includes a common piece 33B accommodated in the accommodating portion 15B. The common piece 33B is formed in an E shape in plan view, and has three strip-like branch portions extending in parallel to each other and a connecting portion extending by connecting the base ends of the three branch portions. is doing. Branch portions located at both ends of the common piece 33B are a movable contact piece 31B and a movable contact piece 32B, respectively, and are integrally formed with the common piece 33B. Further, the branch portion located at the center of the common piece 33B is held in contact with the third terminal piece 23B, thereby conducting to the third terminal piece 23B. The common piece 33B is attached to the base 14B by fitting a protrusion provided on the base 14B into a hole provided in the connecting portion. The third terminal piece 23B is configured as a single piece as a strip-shaped metal piece extending opposite to the central branch portion of the common piece 33B.

  The movable contact piece 31B of the common piece 33B is configured to face the terminal piece 21B with a space therebetween. The movable contact piece 32B of the common piece 33B is configured to face the terminal piece 22B with a space therebetween.

  FIG. 8A is a perspective view showing a cross-section of the main part of the sheet 17B. In addition to the bellows 71B and the protrusion 73B provided in the region facing the operation member 11B and the bellows 72B and the protrusion 74B provided in the region facing the operation member 12B, the sheet 17B further includes a protrusion 75B. I have. The protrusion 75B protrudes from the surface on the base 14B side of the sheet 17B to the base 14B side. The protrusions 73B and 74B are first protrusions referred to in the present invention, and the protrusion 75B is a second protrusion referred to in the present invention.

  FIG. 8B is a cross-sectional view showing the positional relationship between the sheet 17B and the common piece 33B. The protruding portion 75B of the sheet 17B is provided so as to overlap a portion where the common piece 33B and the third terminal piece 23B are in contact with each other. Since the sheet 17B is fixed by being sandwiched between a cover 13B and a base 14B (not shown), the common piece 33B is sandwiched between the protrusion 75B of the sheet 17B and the third terminal piece 23B. .

  Since the microswitch 10B is configured in this way, when manufacturing the microswitch 10B, there is no need to perform a process of fixing the common piece 33B and the third terminal piece 23B by soldering or the like. The common piece 33B is attached to the base 14B on which the third terminal piece 23B is insert-molded, and the conductive piece 33B and the third terminal piece 23B are electrically connected only by attaching the cover 13B after the sheet 17B is overlaid. Can be secured. In this micro switch 10B, the movable contact piece 31B and the movable contact piece 32B are configured as an integral common piece 33B. Therefore, the number of members can be reduced and the number of member attaching steps can be reduced as compared with the first embodiment. And can be manufactured more easily.

  The air conditioner may be an indoor unit that does not have an automatic cleaning function, or may be another air purifier or the like.

10A, 10B ... Microswitches 11A, 11B ... First operation members 12A, 12B ... Second operation members 13A, 13B ... Covers 14A, 14B ... Bases 15A, 16A, 15B ... Housings 17A, 17B ... Sheets 18A, 19A ... coil springs 21A, 21B ... first terminal pieces 22A, 22B ... second terminal pieces 23A, 23B ... third terminal pieces 24A, 25A ... terminal exposed portions 31A, 31B ... first movable contact pieces 32A, 32B ... Second movable contact pieces 33A, 33B ... Common piece 34A ... Orthogonal portion 41A ... Ribs 42A, 43A ... Openings 46A, 47A ... Cam 48A ... Shaft hole 49A ... Shaft portion 50A ... Locking portion 51A ... Claw 52A ... Tip 53A ... Rotating shafts 71A, 72A, 71B, 72B ... Bellows 73A, 74A, 73B, 74B, 75B ... Projection 100A ... Air conditioner 101A, 1 2A ... air filter

Claims (9)

A first terminal piece and a second terminal piece arranged in the width direction of the base and attached to the base;
A common piece attached to the base and spaced apart in a direction perpendicular to the width direction of the base with respect to the first terminal piece and the second terminal piece;
A first movable contact piece and a second movable contact piece arranged in the width direction of the base, one end being a free end and the other end being attached to the common piece;
The state in which the free end of the first movable contact piece is electrically connected to the first terminal piece by the pressing operation, and the free end of the first movable contact piece is electrically connected from the first terminal piece. A first operating member that switches the state between the state disconnected and
and,
The state in which the free end of the second movable contact piece is electrically connected to the second terminal piece by the pressing operation, and the free end of the second movable contact piece is electrically connected from the second terminal piece. A second operating member for switching the state between the state disconnected and
With
The first operating member and the second operating member are arranged in the width direction of the base ,
The micro switch , wherein the common piece, the first movable contact piece, and the second movable contact piece are integrally formed of a conductive material . A first terminal piece and a second terminal piece arranged in the width direction of the base and attached to the base;
A common piece attached to the base and spaced apart in a direction perpendicular to the width direction of the base with respect to the first terminal piece and the second terminal piece;
A first movable contact piece and a second movable contact piece arranged in the width direction of the base, one end being a free end and the other end being attached to the common piece;
The state in which the free end of the first movable contact piece is electrically connected to the first terminal piece by the pressing operation, and the free end of the first movable contact piece is electrically connected from the first terminal piece. A first operating member that switches the state between the state disconnected and
and,
The state in which the free end of the second movable contact piece is electrically connected to the second terminal piece by the pressing operation, and the free end of the second movable contact piece is electrically connected from the second terminal piece. A second operating member for switching the state between the state disconnected and
With
The first operating member and the second operating member are arranged in the width direction of the base,
The microswitch in which the first terminal piece and the second terminal piece and a third terminal piece arranged in the width direction of the base are integrally formed on the common piece. The first terminal piece and the second terminal piece and a third terminal piece arranged in the width direction of the base and attached to the base,
The common piece and the third terminal piece are held in contact with each other,
The microswitch according to claim 1 . A first terminal piece and a second terminal piece arranged in the width direction of the base and attached to the base;
A common piece attached to the base and spaced apart in a direction perpendicular to the width direction of the base with respect to the first terminal piece and the second terminal piece;
A first movable contact piece and a second movable contact piece arranged in the width direction of the base, one end being a free end and the other end being attached to the common piece;
The state in which the free end of the first movable contact piece is electrically connected to the first terminal piece by the pressing operation, and the free end of the first movable contact piece is electrically connected from the first terminal piece. A first operating member that switches the state between the state disconnected and
The state in which the free end of the second movable contact piece is electrically connected to the second terminal piece by the pressing operation, and the free end of the second movable contact piece is electrically connected from the second terminal piece. A second operating member for switching the state between the state disconnected and
and,
A sheet provided between the first and second operation members and the first and second movable contact pieces;
  The first operating member and the second operating member are arranged in the width direction of the base,
The sheet is provided with a bend for absorbing expansion and contraction of the surface of the sheet around an area pushed into the first movable contact piece side and around an area pushed into the second movable contact piece side. A micro switch. Bei give a sheet provided between said first and said second operating member and the first and the second movable contact piece,
The sheet is provided with a bend for absorbing expansion and contraction of the surface of the sheet around an area pushed into the first movable contact piece side and around an area pushed into the second movable contact piece side. ing,
The microswitch according to any one of claims 1 to 3 . The sheet is provided with a protrusion projecting toward the base side in a region pushed into the first movable contact piece side and a region pushed into the second movable contact piece side.
The microswitch according to claim 4 or 5 . The first operating member is a lever that rotates around an axis along the width direction of the base, and by this rotation, the free end of the first movable contact piece is electrically connected to the first terminal piece. The state between the state connected to and the state where the free end of the first movable contact piece is electrically disconnected from the first terminal piece,
The second operating member is a lever that rotates about an axis along the width direction of the base, and by this rotation, the free end of the second movable contact piece is electrically connected to the second terminal piece. The state is switched between the state connected to the state and the state where the free end of the second movable contact piece is electrically disconnected from the second terminal piece.
The microswitch according to any one of claims 1 to 6 . The first terminal piece and the second terminal piece protrude on one side across the rotation shaft of the first operating member and the second operating member, and the first operation on the other side. The tip of the member and the tip of the second operating member protrude,
The microswitch according to claim 7 . A microswitch according to any one of claims 1 to 8,
A first air filter and a second air filter configured to be transportable through a predetermined position,
The microswitch is arranged such that the first operating member contacts the first air filter at a predetermined position, and the second operating member contacts the second air filter at a predetermined position. ,
The first operating member is configured to electrically connect a free end of the first movable contact piece to the first terminal piece by a pressing operation received from the first air filter; The state is switched between a state where the free end of the movable contact piece is electrically disconnected from the first terminal piece,
The second operating member has a state in which a free end of the second movable contact piece is electrically connected to the second terminal piece by a pressing operation received from the second air filter; Switching the state of the second movable contact piece between a state where the free end of the movable contact piece is electrically disconnected from the second terminal piece;
Air conditioner.

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