JP2014120209A - Switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a switch in which the position of a handle is hardly displaced even when vibration is applied.SOLUTION: A mechanism part, which opens/closes a contact part 3 in accordance with the operation direction of a handle 10, comprises: a movable contact member 7; a support member 6 (made up of a base 4 and a support fitting 5); and a reverse spring 8. The movable contact member 7, which is mounted to the handle 10, includes: a step 72 serving as a rocking fulcrum of the handle 10; and a movable contact 32. Locking claws 42 arranged at four points are each engaged with through-holes 24 and 26 of a housing 2 so that the base 4 is mounted to the housing 2. The support fitting 5 mounted to the base 4 is provided with a groove 56 into which the step 72 is inserted in such a manner that the movable contact member 7 is rockable. When the step 72 of the movable contact member 7 is inserted in the groove 56, one end 81 of the reverse spring 8 is held by a projection 55 of the support member 6, while another end 82 is held by a projection 73 which is arranged, on the movable contact member 7, on the opposite side to the step 72 with respect to the projection 55.

Description

  The present invention relates to a switch.

  2. Description of the Related Art Conventionally, there has been a switch for fixing a switch main body, in which a built-in contact portion is turned on / off according to a push operation of a handle, to a body fixed to a construction surface with a screw (for example, see Patent Document 1).

JP 2008-80987 (paragraph [0033] and FIG. 1)

  In the switch described in the above-mentioned Patent Document 1, the switch body is fixed with screws to the body fixed to the construction surface. Therefore, the screws for fixing the switch body due to vibration during transportation are loosened. There was a possibility that the position of the handle provided on the wheel could shift.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a switch in which the position of the operation unit is not easily displaced even when vibration is applied during transportation.

  The switch according to the present invention includes a housing fixed to the construction surface, a contact portion composed of a fixed contact and a movable contact accommodated in the housing, an operation portion that is swingably disposed, and a housing that is accommodated in the housing and operated by the operation portion. And a mechanism for opening and closing the contact according to the direction in which the contact is made. The mechanism unit includes a movable contact member, a support member, and a reversing spring. The movable contact member is provided with a shaft portion and a movable contact serving as a swing fulcrum of the operation unit, and is attached to the operation unit. The support member has a width in which the movable contact member can swing and has a groove into which the shaft portion is inserted, and a locking portion that locks to a locked portion of the housing. It is attached to the housing by being locked to the stop portion. With the shaft portion of the movable contact member inserted in the groove, one end of the reversing spring is held by a spring holding portion provided on the support member, and the other end of the reversing spring is held by the movable contact member with a spring. It is hold | maintained in the site | part on the opposite side to a axial part with respect to a part.

  According to the present invention, the support member that supports the operation portion is attached to the housing fixed to the construction surface by locking the locking portion to the locked portion of the housing. Therefore, since the support member is attached to the housing without using a screw, even when vibration is applied during transportation or the like, the locking state between the locked portion and the locking portion of the housing does not occur. There is an effect that the position of the operation unit can be hardly displaced.

It is a disassembled perspective view of the switch of this embodiment. FIG. 2A is a front view, FIG. 2B is a side view, and FIG. It is a perspective view of a switch same as the above. FIG. 2A is a cross-sectional view in an on state, and FIG. 3B is a cross-sectional view in an off state. The mechanism part used for a switch same as the above is shown, (a) is an exploded perspective view with a part omitted, and (b) is a perspective view with a part omitted. The mechanism part used for a switch same as the above is shown, (a) is a front view with a part omitted, and (b) is a BB cross-sectional view. The support metal fitting used for a switch same as the above is shown, (a) is a front view, (b) is a side view, and (c) is a development view.

  Embodiments of a switch according to the present invention will be described below with reference to FIGS. In the following description, unless otherwise specified, the vertical and horizontal directions are defined in the direction shown in FIG. 2A, the left side of FIG. 2B is the front side, and the right side of FIG. 2B is the rear side. Give an explanation.

  As shown in FIGS. 1 to 3, the switch 1 includes a housing 2, a contact portion 3 (consisting of a fixed contact 31 and a movable contact 32), a support member 6 (comprising a base 4 and a support bracket 5), A movable contact member 7, a reversing spring 8, two pairs of pillar terminals 9, and a handle 10 are provided.

  The housing 2 is made of a synthetic resin molded product, and as shown in FIGS. 1 and 2, the shape viewed from the front is formed in a rectangular shape elongated in the vertical direction. The housing 2 is provided with a storage chamber 21 for storing a mechanism portion (comprising a support member 6, a movable contact member 7, a reversing spring 8), a handle 10, and the like. The storage chamber 21 is opened at the front center of the housing 2. Yes. On the front surface of the housing 2, the shape of the opening portion of the storage chamber 21 is formed in a rectangular shape elongated in the vertical direction. In the rear portion of the storage chamber 21, storage portions 22 a and 22 b for storing the pillar terminals 9 are respectively provided in the center portion and the lower side portion in the vertical direction, and the two storage portions 22 a and 22 b are connected to the storage chamber 21. . Further, on the front surface of the housing 2, through holes 23 penetrating the housing 2 in the front-rear direction are provided on both upper and lower sides, and tapping screws (not shown) inserted into the respective through holes 23 are applied to a construction surface (for example, a wall). The housing 2 is fixed to the construction surface by screwing into the construction surface.

  The pillar terminal 9 includes a terminal plate 90 and a terminal screw 91 as shown in FIGS. The terminal plate 90 is formed in a rectangular tube shape by bending a band-shaped metal plate, and is accommodated in the accommodating portions 22a and 22b so that the openings at both ends are opposed to the left and right side walls. A screw hole 92 into which a terminal screw 91 is screwed from behind is formed in the rear side wall of the terminal plate 90. A through hole 24 is formed on a side wall of the storage portion 22a at a portion facing the terminal plate 90 stored in the storage portion 22a, and an electric wire (not shown) is passed through the through hole 24 and into the cylinder of the terminal plate 90. Is inserted. Further, a through hole 25 into which a tool such as a screwdriver is inserted in order to turn the terminal screw 91 is provided in the rear wall of the storage portion 22a. Similarly, a through hole 24 is formed on the side wall of the storage portion 22b at a portion facing the terminal plate 90 stored in the storage portion 22b, and a terminal screw 91 is turned on the rear wall of the storage portion 22b. A through hole 25 for inserting a tool such as a screwdriver is provided.

  The fixed contact 31 is fixed to the terminal plate 90 accommodated in the lower accommodating portion 22b. The fixed contact 31 is formed of a metal material in a truncated cone shape, and a bar-shaped protrusion 31a is integrally formed on the bottom surface thereof. A hole 93 for passing the protrusion 31a is formed in the front frame portion of the terminal board 90. The protrusion 31 a of the fixed contact 31 is inserted into the hole 93 from the front side of the terminal plate 90 and is further passed through the hole 95 of the terminal piece 94 disposed in the cylinder of the terminal plate 90. Then, the fixed contact 31 is fixed to the terminal plate 90 by applying a force to the tip portion of the protrusion 31 a protruding rearward from the hole 95 and crushing it.

  The handle 10 is made of a synthetic resin molded product, and is formed in a box shape with an open rear surface as shown in FIGS. A concave portion 11 into which the movable contact member 7 is fitted is provided on substantially the entire rear surface of the handle 10. A screw hole 13 is provided in the upper part of the rear surface of the handle 10 (that is, the bottom surface of the concave portion 11), and a square hole-shaped storage portion 12 is provided below the screw hole 13 in the rear surface of the handle 10. . The depth of the recess 11 is set to be slightly smaller than the height of the head of the screw 74 screwed into the screw hole 13.

  Next, a mechanism part that opens and closes the contact part 3 according to the direction in which the handle 10 is operated will be described. The mechanism portion includes a support member 6 including a base 4 and a support metal 5, a movable contact member 7, and a reversing spring 8.

  The base 4 is made of a synthetic resin molded product, and as shown in FIGS. 1 and 4, the shape seen from the side is an isosceles triangle whose height is smaller than the base, and the apex portion is shaved. It is formed in a simple shape. A groove 41 into which the support metal fitting 5 is fitted is provided at the center in the vertical direction of the base 4. From the four corners of the rear surface of the base 4, locking claws 42 that protrude rearward are formed. Moreover, since the groove | channel 43 which penetrates the base 4 to the front-back direction is each formed in the intermediate part of the latching claw 42 provided in the right-and-left both sides in the up-and-down both sides part, the latching claw 42 becomes easy to bend. In a state where the mechanism portion is stored in the storage chamber 21, the fixed contact 31 fixed to the terminal plate 90 is exposed to the front through the groove 43 provided on the lower side of the base 4.

  The support metal fitting 5 is formed by pressing and rolling a metal plate. A front view of the support fitting 5 is shown in FIG. 7A, and a side view thereof is shown in FIG. 7B. The support metal 5 includes a rectangular plate-shaped contact piece 51, a sandwiching piece 52 disposed in parallel with the contact piece 51 on the rear side of the contact piece 51, and a vertical protrusion protruding forward from the lower side of the contact piece 51. The piece 53 and a pair of horizontal pieces 54 that protrude upward from the left and right side edges of the vertical piece 53 are integrally provided. Each of the left and right lateral pieces 54 is formed with a V-shaped groove 56 opened upward, and the shaft portion of the movable contact member 7 is inserted into the groove 56 from above so that the movable contact member 7 7 is supported by the support fitting 5 in a swingable manner.

  FIG. 7C is a development view of the metal plate 50 before roll processing, and a band plate-like portion 52a extending upward from the portion 51a serving as the contact piece 51 is U-shaped when viewed from the side. The sandwiching piece 52 is formed so as to be parallel to the contact piece 51. In addition, on the left side of the part 51 a that becomes the contact piece 51, a part 53 a that becomes the vertical piece 53 and a part 54 a that becomes the horizontal piece 54 are integrally connected. A portion 53 a that becomes the vertical piece 53 is on the side opposite to the sandwiching piece 52 and is bent so as to be substantially perpendicular to the contact piece 51. The two portions 54a that respectively become the horizontal pieces 54 protrude in the same direction (the contact piece 51 side) and are bent so as to be substantially orthogonal to the portion 53a that becomes the vertical piece. And the narrow part 55a which protrudes to the left in FIG.7 (c) from the part 53a used as the vertical piece 53 is bend | folded in the opposite direction with respect to the part 51a with respect to the part 53a used as the vertical piece 53, A protrusion 55 that holds one end 81 of the reversing spring 8 is formed. By carrying out roll processing on the metal plate 50 as described above, the support metal fitting 5 having a shape as shown in FIGS. 7A and 7B is formed.

  The support metal fitting 5 is attached to the base 4 as shown to Fig.4 (a) (b). The base 4 and the front wall 90 a of the terminal plate 90 are inserted between the contact piece 51 and the sandwiching piece 52 of the support metal 5. In this attached state, the base 4 and the front wall 90a are sandwiched between the abutment piece 51 and the sandwiching piece 52 by the elasticity of the support metal 5, so that the support metal 5 is mechanically fixed to the base 4. At the same time, the support fitting 5 is electrically connected to the terminal plate 90.

  The movable contact member 7 is formed by pressing and rolling a metal plate. As shown in FIGS. 1 and 4 to 6, the movable contact member 7 has a rectangular plate shape and is sized to be inserted into a recess 11 provided on the rear surface of the handle 10. A substantially T-shaped hole 71 is provided at the center of the movable contact member 7, and a protrusion 73 that holds the end 82 of the reversing spring 8 is formed by cutting a part of the metal plate at the upper edge of the hole 71. Is formed. The movable contact member 7 has holes 75 and 76 opened on both sides of the hole 71, and the movable contact 32 is fixed to the one hole 75 by caulking. The other hole 76 is provided at a portion facing the screw hole 13 of the handle 10 in a state where the movable contact member 7 is fitted in the recess 11 of the handle 10. Thus, the movable contact member 7 is fixed to the handle 10 by screwing the screw 74 passed through the hole 76 into the screw hole 13 with the movable contact member 7 fitted in the recess 11 of the handle 10.

  The width dimension of the lower part (hole 75 side) of the hole 71 provided in the movable contact member 7 is formed to be larger than the dimension between the outer surfaces of the left and right horizontal pieces 54, and the width dimension of the upper part of the hole 71. Is formed in a dimension smaller than the dimension between the inner side surfaces of the left and right horizontal pieces 54. Thereby, the left and right side edges of the hole 71 are formed with stepped portions 72 at the boundary portion between the lower wide portion and the upper narrowed portion, respectively. By inserting it into the groove 56, the movable contact member 7 is swingably supported with respect to the support fitting 5. Here, the stepped portion 72 constitutes a shaft portion serving as a swing fulcrum of the movable contact member 7, and the groove 56 is formed in a V shape so as to ensure a width that allows the movable contact member 7 to swing. .

  The switch 1 is assembled as follows. First, the terminal piece 94 is arranged in the cylinder of the terminal plate 90 constituting one pillar terminal 9, and the protrusion 31 a of the fixed contact 31 is passed through the hole 93 of the terminal plate 90 and the hole 95 of the terminal piece 94. Then, the fixed contact 31 is fixed to the terminal plate 90 by applying a force to the tip portion of the protrusion 31 a exposed from the hole 95 to crush the protrusion 31 a.

  Further, after the movable contact 32 is caulked and fixed to the movable contact member 7, the horizontal pieces 54, 54 of the support fitting 5 are passed through the wide portion of the hole 71 of the movable contact member 7, and the movable contact member is inserted into the groove 56 of each horizontal piece 54. 7 steps 72 are inserted. Then, one end 81 of the reversing spring 8 is hooked on the protrusion 55 of the support metal 5 and the other end 82 of the reversing spring 8 is hooked on the protrusion 73 of the movable contact member 7. The member 7 and the reversing spring 8 are attached (see FIGS. 5 and 6). In this state, the stepped portion 72 is pressed against the trough portion of the groove 56 by the spring force of the reversing spring 8, and the contact portion between the stepped portion 72 and the trough portion of the groove 56 becomes the swing fulcrum of the movable contact member 7. .

  Next, the movable contact member 7 and the support fitting 5 are attached to the handle 10 by fitting the movable contact member 7 into the recess 11 on the rear surface of the handle 10 and screwing the screw 74 passed through the hole 76 into the screw hole 13 of the handle 10. It is done. When the front wall 90 a of the terminal plate 90 and the base 4 constituting the other pillar terminal 9 are inserted between the contact piece 51 and the sandwiching piece 52 of the support metal fitting 5, the elasticity of the support metal fitting 5 causes the contact. The front wall 90 a of the terminal plate 90 and the base 4 are sandwiched between the piece 51 and the sandwiching piece 52. A terminal screw 91 is screwed into the screw hole 92 of the terminal plate 90 provided in each pillar terminal 9.

  Thereafter, the pillar terminal 9 to which the fixed contact 31 is fixed is inserted from the front side of the housing 2 into the lower housing portion 22 b of the housing 2. Next, when the base 4 is inserted into the storage chamber 21 of the housing 2 so that the pillar terminal 9 is inserted into the central storage portion 22a of the housing 2 from the front side of the housing 2, the locking claw 42 is moved into the storage chamber. 21 hits the inner surface of 21 and is bent inward. When the handle 10 is pushed and the base 4 is inserted to a predetermined position in the storage chamber 21, the locking claws 42 provided at the four corners of the base 4 are connected to the through holes 24 and 26 that open on the side surface of the housing 2. Lock. As a result, the base 4 and the handle 10 held on the base 4 via the support fitting 5 are attached to the housing 2.

  In this attached state, the pillar terminal 9 to which the fixed contact 31 is fixed is pressed from the front side by the base 4 attached to the housing 2, and the displacement of the fixed contact 31 and the pillar terminal 9 is suppressed. Further, each of the two sets of pillar terminals 9 is exposed from a through hole 24 provided in the side wall of the housing 2. Thus, the terminal screw 91 is screwed with a tool such as a screwdriver inserted into the through-hole 25 in a state where an electric wire (not shown) is passed from the through-hole 24 into the cylinder of the terminal plate 90. Wire is connected.

  Next, the operation of the switch 1 will be described. FIG. 4A is a cross-sectional view showing the ON state of the contact portion 3, and FIG. 4B is a cross-sectional view showing the OFF state of the contact portion 3. In this switch 1, the reversing spring 8 is extended in the state where the handle 10 is in the neutral position, that is, the front surface of the handle 10 is substantially parallel to the front surface of the housing 2, and the reversing spring 8 has the longest spring length. It has become. Therefore, the handle 10 cannot stay in the neutral position, and as shown in FIG. 4A, the handle 10 rotates counterclockwise around the stepped portion 72 and the contact portion 3 is closed, or As shown in FIG. 4B, the handle 10 rotates clockwise around the stepped portion 72 and is stabilized at any position where the upper rear surface of the handle 10 abuts against the inner wall of the housing 2.

  FIG. 4A shows the ON state of the contact portion 3, and the handle 10 moves to the left centering on the shaft portion (step portion 72) until the movable contact 32 contacts the fixed contact 31 by the spring force of the reversing spring 8. The handle 10 is held in this state. Further, the contact pressure of the contact portion 3 is ensured by the spring force of the reversing spring 8, and the contact portion 3 is maintained in the closed state (ON state).

  When the handle 10 is rotated to the on position and the upper side of the handle 10 is pushed with a finger against the spring force of the reversing spring 8, the handle 10 rotates clockwise in the figure with the shaft portion 72 as a swing fulcrum. To do. When the upper side of the handle 10 is continuously pushed and the handle 10 exceeds the neutral position, the handle 10 is rotated clockwise by the spring force of the reversing spring 8, and the rear portion of the handle 10 as shown in FIG. The handle 10 stops at a position where the upper surface is in contact with the inner wall of the housing 2. In this case, the handle 10 is held in a state of being rotated clockwise in the drawing by the spring force of the reversing spring 8, and the contact portion 3 is maintained in an open state (off state).

  When the handle 10 is rotated to the off position and the lower side of the handle 10 is pushed with a finger against the spring force of the reversing spring 8, the handle 10 rotates counterclockwise in the figure with the shaft portion 72 as a swing fulcrum. Rotate. If the lower side of the handle 10 is continuously pressed and the handle 10 exceeds the neutral position, then the handle 10 is rotated counterclockwise in the drawing by the spring force of the reversing spring 8, and the movable contact 32 is shown in FIG. 4 (a). The handle 10 stops at a position where the contact with the fixed contact 31 occurs. In this state, the contact pressure of the contact portion 3 is ensured by the spring force of the reversing spring 8, and the closed state (ON state) of the contact portion 3 is maintained.

  As described above, the switch according to the present embodiment functions as a tumbler switch that opens and closes the contact portion 3 by operating the operation portion including the handle 10 in two opposite directions.

  As described above, the switch 1 of the present embodiment is swingably disposed with the housing 2 fixed to the construction surface, the contact portion 3 including the fixed contact 31 and the movable contact 32 housed in the housing 2. Handle 10 (operation unit) and a mechanism unit. The mechanism part includes a movable contact member 7, a support member 6 (consisting of a base 4 and a support metal 5), and a reversing spring 8, and opens and closes the contact part 3 according to the direction in which the handle 10 is operated. The movable contact member 7 is provided with a shaft portion (stepped portion 72) and a movable contact 32 that serve as a swing fulcrum of the handle 10, and is attached to the handle 10. The support member 6 has a width in which the movable contact member 7 can swing, and a groove 56 into which the shaft portion (step portion 72) is inserted, and a locked portion (through holes 24, 26) of the housing 2. A locking portion (locking claw 42) to be locked is provided. The support member 6 is attached to the housing 2 by locking the locking portion to the locked portion. In a state where the shaft portion 72 of the movable contact member 7 is inserted into the groove 56, one end portion 81 of the reversing spring 8 is held by a spring holding portion (protrusion 55) provided on the support member 6. The other end 82 of the reversing spring 8 is held in the movable contact member 7 at a portion (protrusion 73) opposite to the shaft portion 72 with respect to the spring holding portion.

  Thus, when the handle 10 is operated, the movable contact member 7 swings with the handle 10 about the shaft portion (step portion 72) as a fulcrum, and the contact portion 3 opens and closes accordingly. The movable contact member 7 is held at the reverse position by the spring force of the reverse spring 8, and the ON state or the OFF state of the contact portion 3 is held. Moreover, the support member 6 that supports the handle 10 is attached to the housing 2 fixed to the construction surface by locking the locking portion to the locked portion of the housing 2. Accordingly, since the support member 6 is attached to the housing 2 without using a screw, even when vibration is applied during transportation or the like, looseness occurs in the locked state between the locked portion of the housing 2 and the locking portion. There is nothing. Therefore, it is possible to realize a switch in which the support member 6 and the position of the handle 10 held by the support member 6 are difficult to shift.

DESCRIPTION OF SYMBOLS 1 Switch 2 Housing 3 Contact part 4 Base 5 Support metal fitting 6 Support member 7 Movable contact member 8 Reversing spring 10 Handle (operation part)
24, 26 Through hole (locked part)
31 Fixed contact 32 Movable contact 42 Locking claw (locking part)
55 Protrusion (spring holding part)
56 Groove 72 Step (Shaft)
73 Protrusion

Claims (1)

A housing fixed to the construction surface;
A contact portion comprising a fixed contact and a movable contact housed in the housing;
An operation unit arranged to be freely swingable;
A mechanism portion that is housed in the housing and opens and closes the contact portion according to a direction in which the operation portion is operated,
The mechanism part is
A shaft portion serving as a swing fulcrum of the operation portion and the movable contact are provided, and a movable contact member attached to the operation portion;
The movable contact member has a swingable width so that the shaft portion is inserted, and a locking portion that locks the locked portion of the housing. A support member attached to the housing by being locked to a locking portion;
In a state where the shaft portion of the movable contact member is inserted into the groove, one end side is held by a spring holding portion provided in the support member, and the other end side is fixed to the spring holding portion in the movable contact member. A reversing spring held in a portion opposite to the shaft portion,
A switch comprising:

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