JP2007257913A - Power switch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power switch which allows its switch body to be miniaturized and ensures a good electric performance. <P>SOLUTION: This power switch 1 is composed of a plate, rotary terminal 12, and an insulating resin 13 provided around the terminal. It is also provided with a pair of fixed plate terminals 3, 4, each having a rotary terminal compact 2 rotatable in single direction, an elastic contact member 22 sandwiching the rotary terminal, and an external connector 18. The rotary terminal 12 is touched to each pair of elastic contact members 22 at both sides of a hole 14 with a driving shaft 6 passed through. A clearance between the paired fixed terminals 3, 4 is regulated by a spacer 5. A number of slanted contact pieces 24 are formed on the elastic contact member 22, and the opposed contact pieces are slanted in the same direction. The contact pieces 24 are slanted in a way that they diagonally touch the rotary terminal 12. A boundary between the rotary terminal 12 and the insulating resin 13' is coated by a rib 40 integrated with the insulating resin. The insulating resin 13' is thinned at both sides of the rotary terminal 12. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a power switch that cuts off current when there is contact between a rotating terminal and a fixed terminal.

  FIG. 9 shows one form of a conventional power switch (see Patent Document 1).

  The power switch 71 includes a first bus bar 73 that is a conductive metal plate connected to the battery post 72 of the automobile, a second bus bar 74 connected to the load side of the vehicle, and both the bus bars 73 and 74. An oscillating plate 76 having a conductor portion 75 for connection to both bus bars 73 and 74 is provided so as to oscillate about a shaft portion 78 as a fulcrum.

  Both bus bars 73 and 74 are provided with curved elastic contact plates (not shown), and the swing plate 76 is rotated by driving the motor 77 from the state shown in FIG. The conductor portion 75 of the moving plate 76 enters and energization is performed, and the swing plate 76 returns to the position shown in FIG.

  10 (a) and 10 (b) show another form of a conventional power switch (see Patent Document 2).

  The power switch 61 is rotatably disposed between a pair of plate-like fixed terminals 62, a thick conductive contact portion 63 provided at the base end of each fixed terminal 62, and both fixed terminals 62. The rotating terminal 64 includes a case 65 made of an insulating resin that covers and holds the conductive contact portion 63 on the base end side of the rotating terminal 64 and the fixed terminal 62.

  The rotary terminal 64 has a plurality of contact spring pieces 66 (FIG. 11) on the arc surfaces at both ends, and the conductive contact portion 63 at the base end of the fixed terminal 62 has an arc surface that makes the contact spring pieces 66 slidably contact. . Insulating portions 67 are provided on both sides in the width direction of the rotary terminal 64. As shown in FIG. 11, the rotary terminal 64 and the insulating portion 67 are sandwiched between front and rear resin caps 69, and these form a cylindrical rotary terminal assembly.

The front ends of both fixed terminals 62 are connected to, for example, a power supply line of an automobile battery. The rotary terminal 64 is rotated by driving means (not shown) such as a motor and a gear. In the state shown in FIG. 10A, both fixed terminals 62 are connected via a rotating terminal 64, and each battery auxiliary device is energized from the battery, and the rotating terminal is rotated 90 ° from the state shown in FIG. 10A. In the state shown in FIG. 10B, the contact between the fixed terminals 62 and the rotating terminal 64 is cut off, and the conduction from the battery is cut off.
Japanese Patent Laid-Open No. 11-219631 (FIG. 2) JP-A-2002-367462 (FIGS. 8 and 10)

  However, in the conventional power switch 71 of FIG. 9, when the switch-off state continues for a long time, the surface of the conductor portion 75 of the swing plate 76 and the elastic contact plate on the bus bars 73 and 74 side is oxidized. There was a problem that the conductivity was likely to decrease. In addition, when the sliding resistance between the swing plate 76 and the upper and lower elastic contact plates is increased, there is a concern that the power supply circuit may be intermittently connected. Further, in order to intermittently connect the power supply circuit by manual operation, the swing plate 76 must be moved (reciprocated) in different directions, and there is a problem that the operability is poor.

  Further, in the conventional power switch 61 of FIG. 10, the cross-sectional area of the rotary terminal 64 is reduced by providing a hole through which the shaft portion 68 passes in the center of the rotary terminal (conductor portion) 64. In order to compensate for the increase in resistance (decrease in electrical conductivity), the thickness of the rotating terminal 64 has to be increased, and there has been a problem that the switch main body and thus the power switch itself is increased in size. This is also caused by the large height of the contact spring piece 66. Further, when spatter is generated due to sparks during the initial contact between the contact spring piece 66 and the fixed terminal 62, the sputter bites into the fixed terminal 62, the inner peripheral surface of the case 65, etc., and the frictional resistance increases, so that the rotating terminal There was also a concern that the movement of 64 would worsen.

  In view of the above-described points, the present invention can reduce the size of the switch main body, and can perform the connection and disconnection of the power supply circuit with good operability, and reduce the oxidation of the conductor and the cross-sectional area. It is an object of the present invention to provide a power switch that can improve a decrease in the conductivity due to the above and can always exhibit good current-carrying performance.

  In order to achieve the above object, a power switch according to claim 1 of the present invention sandwiches a rotary terminal molded body composed of a disk-shaped rotary terminal and a surrounding insulating resin portion, and the rotary terminal. It is provided with a pair of plate-shaped fixed terminals which have an elastic contact member and the external connection part for input / output.

  With the above configuration, a thin switch main body is configured by the disk-shaped rotating terminal molded body and the plate-shaped fixed terminals located on both sides in the plate thickness direction of the rotating terminal molded body. It is preferable from the viewpoint of improving operability that the rotary terminal molded body is rotated in one direction by manual operation. The disk-shaped rotary terminal molded body has a center of rotation at the center.

  The power switch according to claim 2 is characterized in that, in the power switch according to claim 1, the rotating terminal contacts each pair of the elastic contact members on both sides of the hole portion through which the driving shaft portion is inserted. To do.

  With the above configuration, a double contact area is ensured as compared with the case where the rotary terminal contacts the pair of elastic contact members on one side of the hole, electric resistance is reduced, and energization performance is increased. Even if the hole is large, since the rotary terminal contacts in the plate thickness direction, the energization performance is ensured regardless of the hole.

  According to a third aspect of the present invention, in the power switch according to the first or second aspect, the distance between the pair of fixed terminals is defined by a spacer.

  With the above configuration, the spacer is arranged between the pair of fixed terminals, the rotary terminal molded body is rotatably arranged within the range of the spacer thickness, and the rotary terminal is elastic with the optimum contact pressure to the elastic contact member of each fixed terminal. Contact.

  A power switch according to a fourth aspect of the present invention is the power switch according to any one of the first to third aspects, wherein the elastic contact member has a plurality of inclined contact pieces, and the pair of opposing elastic members The contact piece of the contact piece is inclined in the same direction.

  With the above configuration, when the rotating terminal is rotated, the oxide film on the surface of the rotating terminal is scraped off by the inclined contact piece, so that good electrical conductivity is always secured, and each contact piece sandwiching the rotating terminal has low friction resistance. The slidable contact with the rotating terminal reduces the driving force of the rotating terminal.

  The power switch according to a fifth aspect is the power switch according to the fourth aspect, characterized in that the contact piece is also inclined so as to contact with the rotation terminal obliquely.

  With the above configuration, for example, when the contact piece is cut and raised from one conductive metal plate, the length of the contact piece is ensured to be long, and when the switch is connected, only the tip of the leading contact piece is the first. Contacting the rotating terminal minimizes damage to the contact piece when a spark occurs. Furthermore, sliding resistance with respect to the rotating terminal is also reduced.

  The power switch according to claim 6 is the power switch according to any one of claims 1 to 5, wherein a boundary between the rotating terminal and the insulating resin portion is covered with a rib integral with the insulating resin portion. It is characterized by.

  With the above configuration, when the rotating terminal and the insulating resin portion are integrally molded with the resin (insertion molding of the rotating terminal into the insulating resin portion), the resin burrs generated at the end of the rotating terminal are absorbed by the resin ribs, Is prevented from occurring. The rib at the time of rotation of the rotary terminal slides on the contact piece of the elastic contact member to clean the contact piece without dust or oxide film.

  A power switch according to a seventh aspect is the power switch according to any one of the first to sixth aspects, wherein the insulating resin portion is formed thin on both sides of the rotary terminal.

  Due to the above configuration, even if foreign matter such as spatter adheres to the thin part of the insulating resin part when the rotary terminal is rotated or the switch is shut off, there is a gap between the elastic contact member of the fixed terminal, resulting in spatter or the like. Short circuit is prevented.

  According to the first aspect of the present invention, the switch main body is made thin by the disk-shaped rotary terminal molded body and the plate-shaped fixed terminal, and the power switch itself can be made compact in the thickness direction. Further, since the fixed terminal is connected to the rotary terminal by being branched in a substantially U shape from the external connection portion, the heat generation by energization with respect to a large current is reduced, and the heat dissipation effect is enhanced.

  According to the second aspect of the present invention, even when the hole is large, good current-carrying performance is exhibited by each pair of elastic contact members on both sides without adversely affecting the current-carrying property. Further, by connecting the elastic contact member separately to the fixed terminal, the size and number can be changed according to the energization current value.

  According to the invention described in claim 3, since the contact pressure of the rotary terminal with respect to the elastic contact member of each fixed terminal is always kept optimal by the spacer, the elastic contact member is not buckled, and the energization performance is long-term. Well maintained.

  According to the invention described in claim 4, the oxide film of the rotating terminal is scraped off by the respective inclined contact pieces facing each other so that the current-carrying performance is always kept good and the rotating operation force of the rotating terminal is low. , Operability is improved.

  According to the fifth aspect of the present invention, when the switch is connected, only the tip of the leading contact piece comes into contact with the rotary terminal to generate a spark, so that the contact piece is prevented from being damaged, and the oblique contact piece is used. The sliding resistance with the rotating terminal is reduced, and the rotating operability of the rotating terminal is further improved.

  According to the sixth aspect of the present invention, resin burrs generated at the boundary between the rotary terminal and the insulating resin portion during integral resin molding of the rotary terminal molded body are prevented, and generation of contact gaps and the like due to burrs is prevented. When the rotary terminal is rotated, the ribs wipe the contact pieces of the elastic contact member (contact so as to scrape), so that the energization performance is always kept good.

  According to the seventh aspect of the present invention, even if spatter or the like adheres to the thin portion of the insulating resin portion, spatter or the like does not contact the elastic contact member of the fixed terminal. Reliability is improved.

  1 to 2 show an embodiment of a power switch according to the present invention.

  As shown in FIG. 1, the power switch 1 includes a disk-shaped rotary terminal molded body 2 and a pair of upper and lower plate-shaped fixed terminals 3 and 4 arranged so as to sandwich the rotary terminal molded body 2 in the thickness direction. The spacer 5 made of insulating resin disposed between the fixed terminals 3 and 4, the shaft portion 6 that rotatably supports the rotary terminal molded body 2, and a coil spring (elastic member) 7 via the shaft portion 6. A circular ratchet plate 8 biased in a direction away from the rotary terminal molded body 2 (upward direction), a circular operation switch 9 engaged with the ratchet plate 8, and an upper and lower division housing each member 2 to 9. It is comprised with the insulation cases 10 and 11 of a type | formula. At least the rotary terminal molded body 2 and the pair of fixed terminals 3 and 4 constitute a switch main body 50 (FIG. 2).

  As shown in FIGS. 1 to 2, the rotary terminal molded body 2 is made of a rotary terminal 12 that is a conductive metal bus bar, and a circular plate-like synthetic resin that is integrally molded with the periphery and the center of the rotary terminal 12. It is comprised with the insulating resin part 13. FIG. The rotary terminal 12 is extended in the direction of 180 °, has a hole portion 14 at the center, the periphery of the hole portion 14 is covered with the boss portion 15 of the insulating resin portion 13, and the outer periphery of both end portions in the longitudinal direction is covered with the insulating resin portion 13. The front and rear and upper and lower (both sides in the thickness direction) contact surfaces (substitute with reference numeral 12) are exposed with the hole 14 as a boundary. The insulating resin portion 13 of this example has radial ribs 17 between the central boss portion 15 and the outer peripheral annular portion 16.

  Each of the fixed terminals 3 and 4 is composed of a single substrate 19 having an external connection portion 18 (one on the input side and the other on the output side) 18 on the distal end side, and two parallel contact plates 20 orthogonal to the substrate 19. The fixed terminal main body 21 that is a bus bar and the elastic contact member 22 that is a multi-contact disposed so as to face each contact plate 20 are symmetrically configured (the same shape is inverted by 180 °). Yes. Each of the fixed terminals 3 and 4 may be referred to as a fixed terminal assembly. In the specification, the top, bottom, left, and right directions are for convenience of explanation, and do not always coincide with the arrangement direction of the power switch 1.

  The elastic contact member 22 was bent in a substantially U shape on both sides of the substrate portion 23 and a plurality of contact pieces 24 obliquely cut and raised from the rectangular substrate portion 23 made of conductive metal in the board portion plate thickness direction. And a caulking piece 25 for fixing. Each contact piece 24 has a contact protrusion 24 a at the center, and both ends of each contact piece 24 intersect the substrate portion 23 and continue integrally. Each contact piece 24 is inclined not only in the plate thickness direction but also in the longitudinal direction of the substrate portion 23 (this will be described later). The crimping piece 25 holds the contact plate 20.

  The inclination directions of the contact pieces 24 of the pair of elastic contact members 22 on the same surface in the two contact plates 20 of the fixed terminals 3 and 4 are reversed, and the elastic contact members 22 facing the fixed terminals 3 and 4 are opposed to each other. The inclination direction of the contact piece 24 is the same. Thus, the power switch is turned on and off by rotating the operation switch 9 by 90 ° in one direction, and the operation switch 9 is smoothly rotated with a small force (sliding resistance).

  Even when the bus bar which is the rotary terminal 12 is arranged on only one side with the hole 14 at the center of the rotary terminal molded body 2 as a boundary, the power supply circuit can be turned on and off by rotating the operation switch 9 by 90 °. Since the electrical contact area is halved, the electrical resistance is doubled. In this case, the contact plate 20 (elastic contact member 22) of each of the fixed terminals 3 and 4 can be made into one sheet corresponding to only one rotary terminal 12.

  In the example of FIG. 2, two pairs of support holes 26 are provided on the side end of each substrate 19 and the tip of each contact plate 20 of the fixed terminal main body 21, and one external connection 18 is provided on the external connection portion 18. Two connecting holes 27 are provided. Annular portions 28 at both ends of each insulating resin spacer 5 are arranged with respect to each supporting hole portion 26, and both annular portions 28 are connected by a connecting plate 29. The spacer is formed thicker than the rotary terminal molded body, and the rotary terminal 12 is in elastic contact with the elastic contact members 22 of the fixed terminals 3 and 4.

  The two fixed terminals 3 and 4 are arranged in parallel and symmetrically with the spacer 5 in between, and the elastic contact members 22 of both the fixed terminals 3 and 4 are located opposite to each other. The rotary terminal molded body 2 is positioned between the spacers 5, the rotary terminal 12 is positioned so as to be able to come into contact with the pair of elastic contact members 22, and the rotation driving shaft portion 6 is connected to each substrate 19 and each contact plate. 20 is inserted into a rectangular space surrounded by 20.

  Since the fixed terminals 3 and 4 and the rotary terminal molded body 2 are formed in a plate shape, the switch structure is thinned in the thickness direction. In addition, since the elastic contact members 22 of the upper and lower fixed terminals 3 and 4 are brought into contact with each other in the plate thickness direction of the rotary terminal 12, even if the central hole 14 of the rotary terminal 12 is large, the current-carrying performance is not affected. Will not be affected. Since the elastic contact members 22 are respectively provided on the two contact plates 20 of the fixed terminals 3 and 4, even if the rotary terminal 12 is divided (separated) into the left and right with the hole 14 as a boundary, there is no energization performance. Will not be affected. Further, since the upper and lower elastic contact members 22 are in contact with the thickness direction of the rotary terminal 2, even if the thickness of the rotary terminal 2 is thin, the current-carrying performance is not affected at all (rather, the thinner one has less resistance). .

  As shown in FIG. 1, the holes 26 of the lower fixed terminal 4 engage with bosses (tubular parts) 29 at the four corners of the lower case 11, and the annular parts 28 of the spacer 5 engage with the bosses 29. Then, the hole portion 26 of the upper fixed terminal 3 is engaged with the boss portion 29. The lower end of the shaft portion 6 engages with the central cylindrical portion 30 of the lower case 11. The upper end of the shaft portion 6 passes through the central hole portion 31 of the ratchet plate 8 and is fixed to the operation switch (dial) 9, and the intermediate key portion of the shaft portion 6 engages with the hole portion 14 of the rotary terminal 12. A boss portion (not shown) on the lower surface side of the rotary terminal molded body 2 comes into contact with the cylindrical portion 30.

  The ratchet plate 8 has a projection 32 that abuts against the upper fixed terminal 3 against the bias of the coil spring 7, and a boss portion (not shown) that also presses the central boss portion 15 of the rotary terminal molded body 2. And an inclined protrusion 34 that presses against each protrusion 33 on the outer periphery of the operation switch 9. The operation switch 9 is accommodated inside the annular wall 35 of the upper case 10.

  By rotating the operation switch 9 in the direction of the arrow 36, the protrusion 33 pushes down the inclined protrusion 34, and the rotary terminal molded body 2 is driven (rotated) by the shaft portion 6, while the ratchet plate 8 is fixed to the fixed terminals 3 and 4. The power supply circuit is reliably energized by pressing the rotary terminal 12. At this time, the inclined contact piece 24 (FIG. 2) of the elastic contact member 22 rubs the surface of the rotating terminal 12, whereby the oxide film on the surface of the rotating terminal 12 is removed.

  By rotating the operation switch 9 in the same direction again, the rotary terminal 12 is reversed and separated from each elastic contact member 22 in the direction of 90 ° to shut off the power circuit, and the ratchet plate 8 is rotated by the bias of the spring 7. Separated from the molded body 2 in the plate thickness direction.

  The power switch 1 is connected, for example, between a positive electrode of a car battery and a fusible link box (not shown), and cuts off a dark current such as a clock that is not used when the car is transported by ship. It is used to cut off battery power to prevent short circuit in emergency such as car accidents.

  3 to 4 show other embodiments of the rotary terminal molded body. Constituent parts similar to those in FIG.

  This rotary terminal molded body 2 ′ is formed by forming a thick insert molding portion 37 having a rotary terminal 12 made of a conductive metal, and forming thin insulating resin portions 38 on both sides of the thick portion 37 at the time of connection. In addition to preventing leakage due to adhesion of the sputter 39 (FIG. 6), ribs 40 are formed at the boundary between the thick portion 37 and the thin portion 38, that is, at the boundary between the rotary terminal 12 and the insulating resin portion 13 ′. A resin burr (not shown) at the time of molding is prevented. Since other component parts such as fixed terminals are the same as those in the above-described embodiment, description thereof will be omitted.

  In the rotary terminal molded body 2 ′ in FIG. 3, the annular portion 16 and the radial ribs 17 on the outer periphery of the rotary terminal molded body 2 in FIG. 2 are not formed. The central boss portion 15 ′ has a hole portion 14 through which the shaft portion 6 (FIG. 1) is inserted in a non-rotatable manner, and a pair of ribs 40 are resin-molded in parallel in contact with both sides of the boss portion 15 ′. The rotation terminal 12 which is a bus bar is located inside 40, and the rib 40 protrudes as high as the boss portion 15 'from the exposed surface of the rotation terminal 12 (represented by reference numeral 12).

  A pair of ribs 40 are similarly formed on the back side of the rotary terminal molded body 2 ′. The pair of upper and lower ribs 40 can also be formed in a rotary terminal molded body (for example, the rotary terminal molded body 2 in FIG. 1) having a uniform thickness without the thin portion 38 of the insulating resin portion 13 ′. In FIG. 4 and FIG. 5 below, illustration of the boss portion 15 ′ and the hole portion 14 is omitted (a cross section at a position shifted from the center is shown).

  In the rotary terminal molded body 2 ′ of FIG. 3, it is also effective to form only the rib 40 without forming the thin portion 38 of the insulating resin portion 13 ′, or to form only the thin portion 38 without forming the rib 40. It is. It is also possible to form a similar rib 40 or thin portion 38 on the rotary terminal molded body 2 of FIG.

  FIG. 5 shows one embodiment of a molding die and a molding method for resin molding the rotary terminal molded body 2 ′.

  The molding die 41 is divided into upper and lower parts, and each die 41 has an edge-shaped convex portion 42 for pressing the bus bar 12 as a rotating terminal, and a concave portion 43 for rib molding adjacent to the outside of the convex portion 42. And a small concave portion 44 adjacent to the inside of the convex portion 42, a bus bar pressing surface 45 following the small concave portion 44, a resin portion molding space 46 continuing to the outside of the concave portion 43, and a resin injection gate 47 subsequent thereto.

  Since the upper and lower edge-shaped convex portions 42 sandwich the bus bar 12, the intrusion of a molten resin material (not shown) into the inner side (small concave portion 44) of the convex portions 42 is prevented, and the generation of resin burrs is prevented. . The convex part 42 acts as a burr cut. Both end portions 12a of the bus bar 12 are disposed in the recess 43, and the resin burr generated at the end portion 12a of the bus bar 12 is reliably prevented. The central boss portion 15 ′ (FIG. 3) is injected with resin following the rib 40.

  According to this rotating terminal molded body 2 ′, each contact piece 24 of the elastic contact member 22 (FIG. 2) contacts the rib 40 and climbs over, so that the spatter adhered to the contact piece 24 (with sparks when the switch is intermittent) Foreign matter such as foreign matter) and dust are scraped off and cleaned by the ribs 40, and the effect of maintaining a good connection state between the rotary terminal 12 and the contact piece 24 is also achieved.

  6A shows a switch-on state in which the rotary terminal 12 and the upper and lower fixed terminals 3 and 4 are connected, and FIG. 6B shows a switch-off state in which the rotary terminal and the upper and lower fixed terminals are separated from each other. Each is shown.

  In FIG. 6A, the contact pieces 24 of the upper and lower elastic contact members 22 are inclined in the same direction so that the rotation terminal 12 is rotated in one direction with low friction. Further, each contact piece 24 obliquely contacts the rotary terminal 12 and exhibits a function as a cooling fin and the cleaning function. Generation of an oxide film on the surface of the rotating terminal is suppressed by the cooling action. In addition, the distance between the fixed terminals 3 and 4 and the rotary terminal 12 is defined by the spacer 5 (FIG. 1), and each contact piece 24 contacts the rotary terminal 12 with a stable contact pressure in the elastic region. For example, if the number of the contact pieces 24 is set to be doubled (the length of the elastic contact member 22 is doubled), it is possible to easily handle twice the rated current.

In FIG. 6 (b), when the plate thickness of the insulating resin portion 13 ′ is thinner than that of the rotating terminal 12 (part 38), when the rotating terminal 12 and the fixed terminals 3 and 4 start contact, Even if the spatter 39 adheres to the insulating resin portion 38 due to a spark (short), the insulation distance L ₁ between the insulating resin portion 38 and the contact piece 24 of the elastic contact member 22 is ensured when the power switch 1 is shut off. Short circuit in that state is reliably prevented. Moreover, since the upper and lower opposing elastic contact members 22 are partitioned by the front and back surfaces of the insulating resin portion 38, tracking between both elastic contact members is also prevented.

  FIGS. 7A and 7B show a state at the start of contact between the rotary terminal 12 and the fixed terminals 3 and 4. The rotary terminal 12 shown in FIGS. 1 and 3 is applied. The contact pieces 24 of the fixed terminals 3 and 4 are shown as being inclined only in the longitudinal direction of the substrate portion of the elastic contact member 22.

As shown in FIG. 7A, when the power switch 1 is turned on, only the leading contact piece 24 _{1 of} the plurality of contact pieces 24 raised in an inclined shape of the elastic contact member 22 of the fixed terminals 3 and 4 is the first. rotation since the terminal touches 12, damage of the contact piece 24 by the spark 48 need only contact pieces 24 ₁ of the top also intermittently the switch is frequently repeated, the contact piece 24 of the top subsequent to undamaged Good electrical contact can be ensured.

As in FIG. 7 (b), with respect to the rotational direction A of the rotating terminal 12, by shifting the mounting position of the elastic contact member 22 of the left and right in the same plane as the L _2, damage of the contact piece 24 by the spark 48 Just one place. The rotating terminal 12 contacts the second elastic contact member 22 after contacting the first elastic contact member 22.

  FIGS. 8A and 8B show one form of the elastic contact member of the fixed terminal and the state at the start of contact with the rotary terminal. The rotary terminal 12 shown in FIGS. 1 and 3 is applied.

By cutting each contact piece 24 of the elastic contact member 22 obliquely with respect to the contact member width direction, that is, by inclining it so as to contact obliquely with respect to the rotating terminal, the same base material (conductive metal plate) ), A contact piece 24 having a long edge is obtained, the contact area with the rotary terminal 12 is increased, and the occurrence position of the short 48 with respect to the rotary terminal 12 is integrated into a part of the blade of the leading contact piece 24 _1. In addition, the contact between the blade of the contact piece 24 and the rotary terminal 12 can be performed more smoothly. In FIG. 8B as well, it is possible to dispose the elastic contact members 22 so as to be displaced as indicated by L ₂ as shown in FIG. 7B.

It is a disassembled perspective view which shows one Embodiment of the power switch which concerns on this invention. It is a disassembled perspective view which similarly shows the principal part of a power switch. It is a perspective view which shows other embodiment of the rotation terminal of a power switch. It is a longitudinal cross-sectional view which similarly shows a rotation terminal. It is a longitudinal cross-sectional view which similarly shows the resin molding method of a rotation terminal. (A) is the connection state of a rotation terminal and a fixed terminal, (b) is a longitudinal cross-sectional view which shows the interruption | blocking state similarly. (A) is a side view which shows the initial contact state of a rotation terminal and a fixed terminal, (b) is a top view similarly. (A) is a top view which shows one form of the elastic contact member of a fixed terminal, (b) is a top view which similarly shows the initial contact state of a fixed terminal and a rotation terminal. It is a top view which shows one form of the conventional power switch. (A) is the connection state of the other form of the conventional power switch, (b) is a top view which respectively shows the interruption | blocking state. It is a perspective view which shows the rotating terminal assembly of the conventional power switch.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Power switch 2, 2 'Rotating terminal molded object 3, 4 Fixed terminal 5 Spacer 6 Shaft part 12 Rotating terminal 13, 13' Insulating resin part 14 Hole part 18 External connection part 22 Elastic contact member 24 Contact piece 38 Thin part 40 Rib

Claims (7)

A disk-shaped rotating terminal molded body composed of a plate-shaped rotating terminal and an insulating resin portion around it, and rotating in one direction;
A power switch, comprising: a pair of plate-like fixed terminals each having an elastic contact member sandwiching the rotating terminal and an input / output external connection portion.   2. The power switch according to claim 1, wherein the rotary terminal contacts each pair of the elastic contact members on both sides of a hole portion through which the driving shaft portion is inserted.   3. The power switch according to claim 1, wherein a distance between the pair of fixed terminals is defined by a spacer.   4. The elastic contact member according to claim 1, wherein the elastic contact member has a plurality of inclined contact pieces, and the contact pieces of the pair of opposing elastic contact pieces are inclined in the same direction. Power switch as described in.   The power switch according to claim 4, wherein the contact piece is inclined so as to be in contact with the rotating terminal at an angle.   The power switch according to any one of claims 1 to 5, wherein a boundary between the rotary terminal and the insulating resin portion is covered with a rib integrated with the insulating resin portion.   The power switch according to claim 1, wherein the insulating resin portion is formed thin on both sides of the rotary terminal.

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