JP2011018600A - Switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a switch which does not generate switch on-off timing lag with a strong fixing strength construction between an outer case and an inner case, strong enough not to generate looseness.SOLUTION: The switch is provided with: the inner case 10 accommodating fixed contacts 40, 50 and a movable contact 60 which contacts and separates between the fixed contacts 40, 50; a cover 80 which has a through-hole for an operation lever 83; the outer case 100 where terminals 43, 53 of inner case 10 accommodated inside are made to project from a bottom face and; an operation knob 150 including an operation lever 190 which is arranged on a top part of the cover 80 and axially supported to the outer case 100 rocking-free to operate the movable contact 60. In a state where a bottom face of the inner case 10 contacts an inner bottom face of the outer case 100, the inner case 10, the cover 80 and the outer case 100 are unified by the way of a pressing member 130 fixed to the outer case 100 and arranged across inside of an inner case accommodation part 101 pushing a top face of the cover 80 against the inner case 10.

Description

  The present invention relates to a swing type (seesaw type) switch that switches a switch contact by swinging an operation knob, and more particularly to a switch suitable for use in turning on and off a power source.

  Conventionally, some oscillating power switches (switches used for turning on / off a power source) include elastic claws for mounting on other members, such as the switches shown in FIGS. The inner case (lower case) (8) is inserted into the outer case (upper case) (1) provided with (engagement elastic claws) (15) from the lower side, and installed in the inner case (8). By operating the movable contact body (contact plate) (11) with the operation knob (lever part) (4) installed on the upper side of the inner case (8), the fixed contact body (8) installed in the inner case (8) Some are configured to switch on and off between the support terminal and the fixed terminal (9, 10). The outer case (1) and the inner case (8) are fixed by engaging the engaging claws (8a) provided on the outer peripheral side wall of the inner case (8) with the engaging holes (1b) provided in the outer case (1). It is done by joining.

  By the way, in general, the outer case (1) uses a thermoplastic resin having flexibility as its material in order to integrally form the elastic claws (15). On the other hand, the inner case (8) and the cover (14) that closes the inner case (8) are used as materials in order to prevent the inner case (8) and the cover (14) from being carbonized due to an arc at the time of switching the contacts and causing dielectric breakdown. A thermosetting resin with excellent arc resistance is used. In other words, the power switch is formed of a thermosetting resin excellent in arc resistance in order to satisfy arc resistance characteristics, and has a complicated structure such as an elastic nail (15). The outer case (1) is formed of a thermoplastic resin so that the shape can be molded and flexible.

Japanese Utility Model Publication No. 3-92331

  The conventional power switch is assembled by inserting the inner case (8) and the cover (14) from the opening provided on the bottom surface of the outer case (1), and the engaging claw (8a) of the inner case (8) as the outer case. This is done by engaging the engagement hole (1b) of (1). However, when the inner case (8) and the cover (14) are accommodated in the outer case (1) in this manner, the fixing strength between the engaging claw (8a) and the engaging hole (1b) is strong. However, over time, there was a risk that the fixing strength between the two would loosen and the backlash in the vertical direction would occur. Even if there is no rattling, the engagement structure of the engagement claw (8a) and the engagement hole (1b) generates a strong force that prevents this in the direction of separating both, but the inner case (8) The structure is such that no strong force is generated in the direction of pushing the outer case (1) into the outer case (1), so that it can be moved by, for example, swinging the operation knob (4) from one side to the other. One of the engaging claws (8a) momentarily floats upward (bounces) in the engaging hole (1b) due to a strong impact force generated when the contact body (11) is reversely swung. There was a fear. The fact that the engaging claw (8a) floats upward in the engaging hole (1b) means that the inner case (8) vibrates in the outer case (1), and is movable by this vibration. There was a difference between the reverse swing timing of the contact body (11) and the swing timing of the operation knob (4), and there was a risk that the timing would shift every time the switch was moved to the left or right.

  The present invention has been made in view of the above points, and its purpose is to have a strong fixing strength between the outer case and the inner case, there is no risk of rattling, and the on / off timing of the switch when the operation knob is swung. It is an object of the present invention to provide a switch that does not shift, has a simple structure, and is easily assembled.

  The invention according to claim 1 of the present application has a contact accommodating portion whose upper surface is open, and in this contact accommodating portion, at least a pair of fixed contact bodies and a movable contact that contacts and separates between the pair of fixed contact bodies. An inner case formed by protruding a terminal derived from the fixed contact body on the bottom surface, a cover that covers the upper surface of the inner case and that is provided with an operation lever insertion hole, and the upper surface is open. It has an inner case storage part, an outer case that projects the terminal of the inner case stored in the inner case storage part from the bottom surface to the outside, and is pivotally supported by the outer case installed on the upper part of the cover. And an operation knob having an operation lever that is inserted into the operation lever insertion hole of the cover and operates the movable contact body, wherein the bottom surface of the inner case is connected to the outer case The upper surface of the cover is pressed against the inner case by a pressing member that is bridged across the inner case housing portion of the outer case and fixed to the outer case while being in contact with the inner bottom surface of the inner case housing portion. Thus, the switch is characterized in that the inner case, the cover and the outer case are integrated.

  The invention according to claim 2 of the present application is the switch according to claim 1, wherein both ends of the pressing member are locked to a pair of mounting portions provided on opposing outer peripheral side walls of the outer case. Thus, the switch is spanned in the inner case housing portion.

  The invention according to claim 3 of the present application is the switch according to claim 2, wherein an insertion projection portion to be inserted into the mounting portion of the outer case is provided at the tip of one end portion of the pressing member, and the other A locking claw that prevents the presser member inserted into the mounting portion of the outer case from being pulled out is provided on the outer peripheral side near the end, and further, the tip of the presser member on the side where the locking claw is provided The switch is characterized in that a slit is formed by splitting the tip portion into two portions and providing elasticity to the portion provided with the locking claw.

  According to the first aspect of the present invention, the upper surface of the cover is pressed by the pressing member that is laid across the inner case storage portion in a state where the bottom surface of the inner case is in contact with the inner bottom surface of the outer case. As a result, the inner case, the cover, and the outer case are integrated, so that the fixing strength between the outer case and the inner case is strong, and there is no risk of rattling between the two. Therefore, it is possible to reliably prevent the switch on / off timing from deviating when the operation knob is swung.

  According to the invention described in claim 2, since the holding member has a structure in which both ends thereof are locked to the pair of mounting portions provided on the outer peripheral side walls facing the outer case, the inner case, the outer case, and the like are held by the holding member. The integrated structure is simple and reliable and easy to assemble.

  According to the third aspect of the present invention, the end of the outer case on the side where the insertion protrusion is provided is inserted from one attachment, and the insertion protrusion is engaged with the other attachment. At the same time, the locking claw can be easily mounted by inserting it into the one mounting portion. In particular, since there is a slit on the side of the holding member where the locking claw is provided and the portion of the locking claw is elastic, the locking claw can be easily and reliably attached by so-called snap-in engagement.

It is the perspective view which looked at switch 1 from the upper part. It is the perspective view which looked at switch 1 from the lower side. It is an AA schematic sectional drawing of FIG. FIG. 3 is an exploded perspective view of an upper part when the switch 1 is viewed from above. FIG. 3 is an exploded perspective view of a lower part when the switch 1 is viewed from above. FIG. 3 is an exploded perspective view of an upper part when the switch 1 is viewed from below. FIG. 3 is an exploded perspective view of a lower part when the switch 1 is viewed from below. It is the disassembled perspective view which looked at the inner side case 10 and the 1st, 2nd fixed contact bodies 40 and 50 from the upper side. It is the disassembled perspective view which looked at the inner side case 10 and the 1st, 2nd fixed contact bodies 40 and 50 from the lower side. FIG. 3 is an operation explanatory diagram of the switch 1.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 is a perspective view of a switch 1 according to an embodiment of the present invention as viewed from above, FIG. 2 is a perspective view of the switch 1 as viewed from below, FIG. 3 is a schematic cross-sectional view along AA in FIG. FIG. 5 is an exploded perspective view of the upper part when the switch 1 is viewed from above, FIG. 5 is an exploded perspective view of the lower part when the switch 1 is viewed from above, and FIG. 6 is an exploded perspective view of the upper part when the switch 1 is viewed from below. FIG. 7 is an exploded perspective view of the lower part when the switch 1 is viewed from below. As shown in these drawings, the switch 1 includes an inner case 10 in which two sets of first and second fixed contact bodies 40 and 50 and two sets of movable contact bodies 60 are accommodated, and a contact accommodating portion 11 of the inner case 10. A cover 80 that covers the upper opening of the cover, an outer case 100 that houses the inner case 10 and the cover 80, a pair of pressing members 130 that fix the inner case 10 and the cover 80 in the outer case 100, And an operation knob 150 that is swingably attached to the outer case 100. In the following description, “up” refers to the direction of viewing the operation knob 150 from the inner case 10, and “down” refers to the opposite direction.

  FIG. 8 is an exploded perspective view of the inner case 10 and the first and second fixed contact bodies 40 and 50 as viewed from above. FIG. 9 is a view of the inner case 10 and the first and second fixed contact bodies 40 and 50 as viewed from below. FIG. As shown in these drawings, the inner case 10 is formed by integrally molding a synthetic resin into a substantially rectangular box shape having an open top surface. As the synthetic resin constituting the inner case 10, an insulating material such as a melamine resin excellent in arc resistance and a thermosetting resin such as unsaturated polyester is used. A concave contact housing portion 11 having an open upper surface is formed inside the inner case 10. A dividing wall 13 is formed at the center of the contact accommodating portion 11 to divide it into two. A pair of slit-like terminal insertion holes 15 are provided on the bottom surfaces of the two contact accommodating portions 11 divided by the dividing wall 13. In addition, small projection-like positioning locking portions 17 are provided on the bottom surfaces of the two contact housing portions 11. The opposite side walls 19 facing the longitudinal direction of the inner case 10 are lower in height than the opposite side walls 21 facing the short direction, whereby a recess 23 is formed. Further, a ring-shaped jetty 25 is formed around each terminal insertion hole 15 on the bottom surface of the inner case 10 so as to surround each terminal insertion hole 15, and a concave portion inside thereof is a resin filling portion 27.

  The first fixed contact body 40 bends a middle portion of a substantially band-shaped metal plate at a substantially right angle, and has one portion (a portion facing the horizontal direction) as the fixed contact portion 41 and the other portion (a portion facing the vertical direction). ) Is a terminal 43. A substantially disc-shaped fixed contact 45 is attached to the center of the upper surface of the fixed contact portion 41. Small projection-like fixing portions 47 projecting in the width direction are formed on the base side portions of the left and right sides of each terminal 43.

  The second fixed contact body 50 is formed by bending a bent portion of a substantially L-shaped metal plate at a substantially right angle, fixing one portion (portion facing the horizontal direction) to the fixed contact portion 51 and the other portion (vertical direction). (Portion facing) is a terminal 53. The fixed contact portion 51 is further bent at one end in an upward direction at a substantially right angle, and a concave notch is provided at the tip side thereof, and the recessed side portion is used as a fixed contact 55. The convex portions on both sides of the fixed contact 55 are movable contact body locking portions 56. Small projection-like fixing portions 57 projecting in the width direction are formed on the base side portions of the left and right sides of each terminal 53. Further, a locking portion 59 made of a through hole is provided at the base portion bent upward of the fixed contact portion 51.

  In order to attach the first and second fixed contact bodies 40 and 50 to the inner case 10, firstly, one set of the first and second fixed contact bodies 40 and 50 is inserted into each contact accommodating portion 11 of the inner case 10. Then, the terminal 43 of the first fixed contact body 40 and the terminal 53 of the second fixed contact body 50 are respectively inserted into the terminal insertion holes 15 of the inner case 10. The base fixing portions 47 and 57 of the terminals 43 and 53 protruding from the bottom surface of the inner case 10 are mechanically crushed, thereby fixing the first and second fixed contact bodies 40 and 50 in the inner case 10. . Then, each resin filling portion 27 on the lower surface of the inner case 10 is filled with a sealing resin 30 made of an epoxy-based adhesive or the like as shown in FIG. 2, and is slightly between the terminals 43 and 53 and the terminal insertion hole 15. At the same time as sealing a gap, the fixing strength of the first and second fixed contact bodies 40, 50 to the inner case 10 is increased. Thereby, the attachment of the first and second fixed contact bodies 40 and 50 to the inner case 10 is completed.

  5 and 7, the movable contact body 60 is formed of a substantially strip-shaped and elongated metal plate, and a substantially disk-shaped movable contact (hereinafter referred to as “on / off contact”) 61 is attached to the lower surface near one end thereof. ing. In addition, a locking portion 63 is formed in the center of each of the pair of outer peripheries in the longitudinal direction and is formed in a concave shape, and the lower surface portion of the movable contact body 60 connecting the pair of locking portions 63 is linear. The movable contact (hereinafter referred to as “normal contact”) 65 is used. Further, the end of the movable contact body 60 on the opposite side where the on / off contact 61 is provided is bent downward, and the tip side facing downward is a contact portion 67.

  As shown in FIGS. 4 and 6, the cover 80 is formed by molding synthetic resin into a substantially rectangular shape and sized to cover the upper opening of the contact accommodating portion 11 of the inner case 10. Side walls 81 that project downward and block the recesses 23 are provided on both sides facing the 10 recesses 23. As the synthetic resin constituting the cover 80, an insulating material such as a melamine resin excellent in arc resistance and a thermosetting resin such as an unsaturated polyester is used. In the center of the upper surface of the cover 80, two operation lever insertion holes 83 penetrating vertically are formed in parallel. Each operation lever insertion hole 83 is formed at a position facing the center of each contact accommodating portion 11 of the inner case 10. On both sides of the operation lever insertion hole 83 on the upper surface of the cover 80, a pair of guide grooves 85, 85 for inserting and guiding the pressing member 130 described below are formed.

  As shown in FIGS. 5 and 7, the outer case 100 is formed by integrally molding synthetic resin into a substantially rectangular box shape having an open top surface. As the synthetic resin constituting the outer case 100, a thermoplastic resin that is more flexible than the resin constituting the inner case 10, for example, an insulating material such as flame retardant polyamide or polyacetal is used. A concave inner case housing portion 101 having an upper surface opened is formed inside the outer case 100, and a terminal insertion portion 103 formed of four substantially rectangular through holes is formed on the bottom surface thereof. Each terminal insertion portion 103 is formed in a size and shape for inserting each jetty 25 of the inner case 10. A shaft support hole 105 penetrating in a circular shape is formed in the upper center of opposite side walls (both side walls substantially perpendicular to the swing axis of the operation knob 150 described below) of the outer case 100, and the shaft support holes 105 on the same side wall. On both sides, attachment portions 107a and 107b are formed, each penetrating in a substantially rectangular shape. Although the width dimension in the height direction of both attachment parts 107a and 107b is substantially the same, the length dimension in the horizontal direction is different, and one attachment part 107a is shorter than the other attachment part 107b. The mounting portion 107a provided on one side wall and the mounting portion 107b provided on the other side wall face each other, and the mounting portion 107b provided on one side wall and the mounting portion 107a provided on the other side wall also face each other. Yes. A pair of impact locking portions 109 are formed on the outer peripheral surfaces of the opposite side walls of the outer case 100 where the mounting portions 107a and 107b are not provided. The bullet locking portion 109 is a substantially V-shaped flat arm that extends in the vertical direction and expands outward, and has elasticity by connecting the upper and lower ends to the side wall. An uneven locking portion 109a is formed on the outer surface of the upper portion of the arm.

  The holding member 130 is formed by molding synthetic resin into a substantially elongated flat plate shape, and has a size and shape that can be inserted into the mounting portion 107 b of the outer case 100. As the synthetic resin constituting the pressing member 130, for example, an insulating material such as thermoplastic PBT (polybutylene terephthalate) resin is used. Insertion protrusions 131 to be inserted into the attachment portion 107a of the outer case 100 are provided at the tip of one end portion of the pressing member 130, and the attachment portions 107b of the outer case 100 are provided on both outer sides near the other end portion. A pair of locking claws 133 are provided to prevent the presser member 130 inserted into the stopper member 130 from being pulled out, and the distal end portion of the presser member 130 on the side where the locking claw 133 is provided is divided into two and locked. A slit 135 is formed to give elasticity to the portion where the claw 133 is provided. The insertion protrusion 131 has a substantially rectangular shape and a dimension that can be inserted into the mounting portion 107a. The locking claw 133 has a tapered shape (triangular shape) that gradually widens the width dimension of the pressing member 130 from the end side where the insertion protrusion 131 is provided toward the other end side, and is the most widened. The side end is locked to the inner surface side of the inner case storage portion 101. The slit 135 is linear and is formed so as to enter the interior beyond the portion where the locking claw 133 is formed, so as to give a sufficient elastic force to the portion where the locking claw 133 is provided. .

  As shown in FIGS. 4 and 6, the operation knob 150 includes a knob exterior body 160, a knob body 170, and a resilient member 180. The knob exterior body 160 is a molded product of synthetic resin (for example, ABS resin or polycarbonate resin), is formed in a substantially rectangular box shape with the lower surface released, and the concave portion on the lower surface side serves as the main body storage portion 161. A main body attachment portion 163 including four small protrusions is formed on the bottom surface of the main body storage portion 161. A shaft portion 165 formed of a small protrusion that is rotatably inserted into the shaft support hole 105 is formed at the center of a pair of outer peripheral side surfaces of the knob exterior body 160 facing the shaft support hole 105 of the outer case 100.

  The knob main body 170 is a molded product of a substantially rectangular synthetic resin (for example, a thermoplastic flame-retardant polyamide resin), and is formed to have a size and shape that can be stored almost exactly in the main body storage portion 161 of the knob exterior body 160. . The knob body 170 is formed with an exterior body attachment portion 171 formed of a small hole through which each body attachment portion 163 of the knob exterior body 160 is inserted and penetrated. A cylindrical operation lever main body 173 is formed. Both the operating lever main body portions 173 are arranged in the width direction at the center of the bottom surface of the knob main body 170 (the swing axis direction of the operating knob 150). On the lower surface of the operation lever main body 173, a resilient member housing portion 175 comprising a substantially circular recess for housing a resilient member 180 described below so as to be movable up and down is formed. The operation lever 190 is configured by the operation lever main body 173 and a resilient member 180 described below.

  The elastic member 180 is made of a synthetic resin (for example, a thermoplastic polyamide resin, PBT resin, or thermosetting melamine resin), and is configured by a substantially cylindrical elastic portion 181 and a coil spring 187. The elastic portion 181 has a lower end surface that is an elastic contact surface 183 that protrudes in a substantially spherical shape, and an upper end surface that is a concave spring accommodating portion 185 into which the coil spring 187 is inserted.

  Next, in order to assemble the switch 1, first, the inner case 10 to which the first and second fixed contact bodies 40 and 50 are attached is housed in the inner case housing portion 101 of the outer case 100 as described above. At this time, each jetty 25 on the bottom surface of the inner case 10 is inserted into each terminal insertion portion 103 of the outer case 100 so that the terminals 43 and 53 protrude from the lower surface of the outer case 100. At this time, the bottom surface of the inner case 10 contacts the inner bottom surface of the outer case 100.

  Next, a pair of movable contact bodies 60 is housed in each contact housing portion 11 of the inner case 10, and at that time, the movable contact body locking portion 56 of the second fixed contact body 50 is attached to the locking portion 63 of the movable contact body 60. At the same time, the normal contact 65 of the movable contact 60 is linearly brought into contact with the fixed contact 55 of the second fixed contact 50. As a result, the movable contact body 60 can swing around the contact line while the normal contact 65 is in contact with the fixed contact 55.

  The cover 80 is housed in the inner case housing portion 101 of the outer case 100 and the opening on the upper surface of the inner case 10 is closed. Next, the end portions provided with the insertion protrusions 131 of the pressing member 130 are inserted into the attachment portions 107b provided on the opposite side walls of the outer case 100, respectively, and provided on the opposite side walls. The insertion protrusion 131 is fitted into the attachment portion 107a. At this time, the pressing member 130 is inserted into the guide groove 85 of the cover 80 while being guided. At the same time, the locking claw 133 of the presser member 130 is inserted into the mounting portion 107b while being deformed so as to reduce the width of the slit 135, and the entire locking claw 133 is inserted into the inner case storage portion 101 to return to the original position. Returning to the shape, the presser member 130 cannot be removed. That is, the pressing member 130 can be easily attached to the outer case 100 by so-called snap-in engagement. As described above, the holding member 130 is engaged with the pair of mounting portions 107a and 107b provided on the opposing outer peripheral side walls of the outer case 100 so that both ends thereof are crossed into the inner case storage portion 101. The upper surface of the cover 80 is pressed against the inner case 10 by the lower surface of the pressing member 130 that is bridged and fixed to the outer case 100 at the same time, whereby the inner case 10, the cover 80, and the outer case 100 are integrated.

  On the other hand, the upper surface side of the knob main body 170 is stored in the main body storage portion 161 of the knob outer body 160, and at that time, each main body attachment portion 163 of the knob outer body 160 is inserted into each outer body attachment portion 171 of the knob main body 170, The tip of each main body mounting portion 163 protruding from the lower surface of the knob main body 170 is crushed by heat caulking, and the knob outer body 160 and the knob main body 170 are integrated. The elastic member 180 is stored in the pair of elastic member storage portions 175 of the knob body 170, and the operation knob 150 is further stored in the inner case storage portion 101 of the outer case 100 that stores the inner case 10 and the like. At this time, the shaft portion 165 provided in the knob exterior body 160 is inserted into the shaft support hole 105 provided in the outer case 100, and thereby the operation knob 150 is pivotally supported with respect to the outer case 100. At this time, the operation lever 190 of the operation knob 150 passes through the operation lever insertion hole 83 of the cover 80, and the elastic contact surfaces 183 of the pair of elastic members 181 at the distal ends are in elastic contact with the upper surfaces of the respective movable contact bodies 60. Thereby, the assembly of the switch 1 is completed. The above assembling procedure is an example, and it goes without saying that the assembly may be performed using other various assembling procedures.

  As shown in FIG. 3, the switch 1 configured as described above has a contact accommodating portion 11 having an open upper surface, and at least a pair of fixed contact bodies (first members) in the contact accommodating portion 11. , Second fixed contact body) 40, 50 and a movable contact body 60 that contacts and separates between the pair of fixed contact bodies 40, 50, and terminals 43, 53 led out from the fixed contact bodies 40, 50 on the bottom surface. An inner case 10 that protrudes from the inner case 10, a cover 80 that covers the upper surface of the inner case 10 and is provided with an operation lever insertion hole 83, and an inner case storage portion 101 that is open at the upper surface. The terminal 43 and 53 of the inner case 10 housed in 101 are protruded to the outside from the bottom surface 100, and are installed on the upper portion of the cover 80 and are pivotally supported by the outer case 100 so as to be swingable. And an operation knob 150 having an operation lever 190 which is inserted into the lever insertion hole 83 and operates while pressing the movable contact body 60, and the bottom surface of the inner case 10 is the inner bottom surface of the inner case storage portion 101 of the outer case 100. The upper surface of the cover 80 is pressed against the inner case 10 by a pressing member 130 that is bridged across the inner case housing portion 101 of the outer case 100 and fixed to the outer case 100 in a state of being in contact with the inner case 10. Thus, the inner case 10, the cover 80, and the outer case 100 are integrated.

  FIG. 3 shows a state in which the operation knob 150 is rocked to one side and is stable. In the state shown in the figure, the elastic surface 183 of the elastic portion 181 of the operation lever 190 of the operation knob 150 is elastically contacted with the upper surface opposite to the on / off contact 61 when viewed from the regular contact 65 of the movable contact body 60. As a result, the contact portion 67 of the movable contact body 60 comes into contact with the inner bottom surface of the inner case 10, so that the on / off contact 61 is separated from the fixed contact 45 of the first fixed contact body 40, and The second fixed contact bodies 40 and 50 are in an off state.

  Next, when the upper surface of the operation knob 150 lifted upward is pressed (in the direction of arrow B shown in FIG. 3), the resilient surface 183 of the resilient portion 181 touches the top surface of the movable contact body 60. The coil spring 187 is pushed and shrunk until it starts moving (sliding) toward the on-off contact 61 side and reaches the portion of the contact point 65 of the movable contact body 60, so that the resilient portion 181 is in the resilient member housing portion 175. When the elastic surface 183 passes through the portion of the regular contact 65, the movable contact body 60 starts swinging so that the on-off contact 61 side descends around the portion of the regular contact 65 and is compressed. The movable contact body 60 suddenly swings due to the elastic force of the coil spring 187, and the on / off contact 61 instantaneously contacts the fixed contact 45 of the first fixed contact body 40 as shown in FIG. Second fixed contact bodies 40, 50 There is turned on. At this time, the operation knob 150 swings to the other side and becomes stable.

  By the way, according to the switch 1, the cover 80 is held by the pressing member 130 that is laid across the inner case storage portion 101 with the bottom surface of the inner case 10 in contact with the inner bottom surface of the outer case 100. Since the inner case 10, the cover 80, and the outer case 100 are integrated by pressing the upper surface, the fixing strength between the outer case 100 and the inner case 10 is strong, even if a strong impact is applied to the switch 1 at the time of switch switching. There is no risk of rattling between the outer case 100 and the inner case 10. Further, according to the switch 1, the operation lever of the operation knob 150 in which the movable contact body 60 in the inner case 10 is attached to the outer case 100 with the bottom surface of the inner case 10 being in contact with the inner bottom surface of the outer case 100. The inner case 10 is always pressed against the inner bottom surface of the outer case 100 because it is configured to be pressed at 190 (especially in the case of the switch 1, the spring is always repelled by the coil spring 187). The fixing strength between the inner cases 10 is increased, and the possibility of rattling between the two is further eliminated. For these reasons, it is possible to reliably prevent the on / off timing of the switch from being shifted due to an impact generated when the operation knob 150 is swung.

  Further, according to the switch 1, the holding member 130 has a structure in which both ends thereof are locked to the pair of mounting portions 107 a and 107 b provided on the opposing outer peripheral side walls of the outer case 100, so that the inner case 10, the outer case 100, etc. Is simple and reliable, and is easy to assemble. Furthermore, according to the switch 1, the end of the pressing member 130 on the side where the insertion protrusion 131 is provided is inserted from one attachment 107b of the outer case 100, and the insertion protrusion 131 is inserted into the other attachment 107a. And can be easily attached by inserting the locking claw 133 into one of the attachment portions 107b. In particular, since there is a slit 135 on the side of the holding member 130 where the locking claw 133 is provided and the portion of the locking claw 133 is elastic, the locking claw 133 can be easily and securely attached by so-called snap-in engagement. Can do.

  In the switch 1, for example, a small protrusion protruding from the inner case 10 is provided between the inner case 10 and the cover 80, and this is inserted into a small hole provided in the cover 80, and the tip of the small protrusion is heated on the upper surface of the cover 80. One reason for not caulking the structure is that the inner case 10 and the cover 80 are made of a thermosetting resin and cannot be caulked.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Is possible. Note that any shape, structure, or material not directly described in the specification and drawings is within the scope of the technical idea of the present invention as long as the effects and advantages of the present invention are exhibited. For example, in the above-described embodiment, two sets of the first and second fixed contact bodies 40 and 50, the movable contact body 60, and the operation lever 190 are installed, but only one set may be installed, or three or more sets. May be installed. In the above-described embodiment, two pressing members 130 are installed. However, only one pressing member 130 may be installed, or three or more pressing members 130 may be installed.

DESCRIPTION OF SYMBOLS 1 Switch 10 Inner case 11 Contact accommodating part 40 1st fixed contact body 41 Fixed contact part 43 Terminal 50 2nd fixed contact body 51 Fixed contact part 53 Terminal 60 Movable contact body 80 Cover 83 Operation lever insertion hole 100 Outer case 101 Inner case Storage part 107a, 107b Attachment part 130 Holding member 131 Insertion protrusion part 133 Locking claw 135 Slit 150 Operation knob 160 Knob exterior body 170 Knob body 173 Operation lever body part 180 Bounce member 181 Bounce part 187 Coil spring 190 Operation lever

Claims (3)

A contact housing portion having an open top surface, and at least a pair of fixed contact bodies and a movable contact body contacting and separating between the pair of fixed contact bodies are housed in the contact housing portion, and the fixed portion is fixed to the bottom surface. An inner case that protrudes from a terminal led out from the contact body;
A cover that covers the upper surface of the inner case and is provided with an operation lever insertion hole;
An outer case that has an inner case housing part with an open top surface, and that projects the terminals of the inner case housed in the inner case housing part from the bottom surface;
A switch provided on an upper portion of the cover and pivotally supported by the outer case so as to be swingable, and an operation knob having an operation lever inserted into the operation lever insertion hole of the cover and operating the movable contact body In
A pressing member that is bridged across the inner case storage portion of the outer case and is fixed to the outer case with the bottom surface of the inner case being in contact with the inner bottom surface of the inner case storage portion of the outer case. The switch is characterized in that the upper surface of the cover is pressed against the inner case, thereby integrating the inner case, the cover, and the outer case. The switch according to claim 1,
The switch, wherein both ends of the pressing member are engaged with a pair of mounting portions provided on opposing outer peripheral side walls of the outer case so as to be bridged in the inner case housing portion. The switch according to claim 2,
An insertion protrusion to be inserted into the mounting portion of the outer case is provided at the tip of one end of the pressing member, and the pressing member inserted into the mounting portion of the outer case is disposed on the outer peripheral side near the other end. Provide a locking claw to prevent it from coming off,
Further, the switch is characterized in that a slit is formed at the tip portion of the holding member on the side where the locking claw is provided to divide the tip portion into two and to give elasticity to the portion provided with the locking claw. .

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