JP6292965B2 - Switching switch - Google Patents

Description

  The present invention relates to a switching switch for switching between two systems of circuits.

  The switching switch that switches the connection destination to one of the two systems is configured so that the movable contact moves between a pair of fixed contacts by the operation of the operation handle. There is something to prepare. For example, in Patent Document 1, a toggle mechanism is connected to a movable contact disposed between two fixed contacts so that the movable contact can be quickly switched.

Republished patent WO2011 / 125120

However, the conventional switching switch described above forms a toggle mechanism by connecting a link arm to which a pair of compression coil springs are connected to a cross bar that rotates a movable contact so that the contact release / contact operation is instantaneous. Since it is configured to be performed, the crossbar becomes long and a large installation space is required, and many members are required for the switching operation, resulting in high cost.
In addition, it has a function to select either one of the two circuits, but there is no selection of an off state in which neither is connected, and if an off operation is required, a separate on / off switch is interposed. It was necessary to let them.

  Therefore, in view of such a problem, the present invention has an object to provide a switching switch that can switch a contact point and turn it off in a space-saving manner with a simple structure of a toggle mechanism.

In order to solve the above-mentioned problem, the invention of claim 1 is arranged such that the fixed contacts are opposed to each other at two positions in the front and rear, a pair of movable contacts are arranged between the two, and the operating means arranged upright is forward. Alternatively, when the tilting operation is performed backward, the movable contact to which the movable contact is attached selectively tilts forward or backward, and the movable contact comes into contact with one of the fixed contacts, thereby switching between the two systems of circuits. The movable contactor is a movable contactor that rotates around a movable contactor rotation fulcrum and switches a fixed contact that the movable contact contacts. A frame having a first rotation shaft that supports the rotation fulcrum is disposed, and the movable contact rotation fulcrum rotates backward with a front rotation fulcrum that becomes a rotation center when rotating forward. Two points with the rear pivot point that becomes the pivot center when Together with constructed are arranged, the first pivot shaft is characterized by comprising provided on front and rear two positions corresponding to the movable contact pivot point.
According to this configuration, the movable contact rotating fulcrum and the first rotating shaft that supports the movable contact rotating fulcrum are provided at two positions in the front and rear, respectively. In this state, both the rotation fulcrum and the rotation shaft are in an engaged state, and a stable off state of the movable contact can be realized.

According to a second aspect of the present invention, in the configuration of the first aspect, the operating means has an operating means rotating fulcrum at the lower end, and the frame is provided with a second rotating shaft that supports the operating means rotating fulcrum. The movable contactor is vertically arranged at a portion overlapping with the operation means, has a movable contactor rotation fulcrum at the upper end base, and has a movable contact at the lower tip, and the operation means rotation fulcrum is a movable contactor rotation fulcrum. The movable contact and the operating means are both arranged by a coil spring extended in the longitudinal direction, and the operating means and the movable contact are pressed against the respective rotating shafts by the contraction force of the coil spring. It is characterized by forming a toggle mechanism.
According to this configuration, since the toggle mechanism is directly formed between the movable contact and the operation means, a space for providing a separate toggle mechanism is not required. Further, the movable contact is reliably pressed against the two rotating shafts even in the off position by the elastic force of the coil spring, so that a stable off state can be ensured.

  According to the present invention, the movable contact rotating fulcrum and the first rotating shaft that supports the movable contact rotating fulcrum are provided at two positions in the front and rear, respectively. In this state, both the rotation fulcrum and the rotation shaft are in an engaged state, and a stable off state of the movable contact can be realized. Further, since the toggle mechanism is directly formed between the movable contact and the operation means, a space for providing a separate toggle mechanism is not required.

An example of the switching switch concerning this invention is shown, (a) is a perspective view, (b) is a top view. It is side surface explanatory drawing of the OFF state which shows the internal structure of the switching switch of FIG. FIG. 3 is an explanatory perspective view of a main part in the state of FIG. It is side surface explanatory drawing corresponding to FIG. 2 which connected the movable contact to one fixed contact. FIG.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below in detail with reference to the drawings. FIG. 1 shows an example of a switching switch according to the present invention. (A) is a perspective view, (b) is a plan view, and corresponds to a three-pole circuit that switches two circuits (not shown) consisting of three lines. A switching switch is shown.
In FIG. 1, 1 to 3 are connection terminals for connecting electric wires, 1 (1a to 1c) is a switching source terminal connected to a movable contact, and 2 (2a to 2c) is one of two switching destination systems. First system terminals 3 and 3 (3a to 3c) to which are connected are second system terminals to which the other of the two systems is connected. Further, 4a is an operation handle for switching operation, and 5 is a terminal screw.
Switching operation of the circuit connected to the switching source terminal 1 is switched between the circuit connected to the first system terminal 2 or the circuit connected to the second system terminal 3 by tilting the operation handle 4a forward and backward. Is done.

  The switching source terminal 1 and the first system terminal 2 are arranged on the left side of the switching switch case 10, while the second system terminal 3 is arranged on the right side of the figure. Further, the operation handle 4 a is disposed on the upper part of the case 10. In the following description, the left side in the figure is the front and the right side is the rear.

  The case 10 is divided into four parts on the left and right sides, and the left three members (first case member 10a, second case member 10b, and third case member 10c) each house a switching mechanism that switches one electrical path. A switching mechanism for a circuit composed of three wires is accommodated by a member. Further, the rightmost case 10 d constitutes a closing plate that closes the right side surface of the case 10.

FIG. 2 is an explanatory side view showing the internal structure of FIG. 1, and shows the first case member 10a in an off state in which the circuit connection is released. 3 is a perspective view showing the main part of the first case member 10a shown in FIG. 2. FIG. 3 (a) is a perspective view seen from an oblique front, and FIG. 3 (b) is a perspective view seen from an oblique rear. It is.
2 and 3, 6 is a fixed contact, 7 is a movable contact, 8 is a movable contact, a pair of fixed contacts 6 are arranged so as to face each other from the front and back, and the fixed contact 6 on the front side is the first system terminal 2. The fixed contact 6 on the rear side is connected to the second system terminal 3. In FIG. 3, the operation handle 4a and a coil spring 20 described later are omitted.

  The movable contact 8 is composed of a single belt-like plate (blade) 8a and a base member 8b for rotating the blade 8a. The blade 8a is arranged to hang down at an intermediate position between the fixed contacts 6 and 6, and the movable contact 7 is fixed to both sides of the hanged tip. However, as shown in FIG. 3, the movable contact 7 is provided on both sides with its position shifted in the lateral direction, and the fixed contact 6 is also positioned so that the front fixed contact 6 and the rear fixed contact 6 are positioned in the horizontal direction. They are offset and face each other.

  The upper portion of the blade 8a is fixed to a metal base member 8b. At the upper end of the base member 8b, two fulcrum fulcrums 12 are formed adjacent to the front and rear when the blade 8a is tilted forward and rearward. A fulcrum (rear side fulcrum) 12b is recessed. However, the rotation fulcrum 12 of the movable contact 8 is formed separately on the left and right according to the shape of the frame 15 described later. The blade 8a is connected to the switching source terminal 1 by a flexible conducting wire (not shown).

  The operating handle 4a protruding from the upper part of the case 10 constitutes the operating means 4 with the supporting member 4b arranged at the lower part, and the supporting member 4b is formed so as to straddle the movable contact 8 from the left and right as shown in FIG. And is extended downward. At the lower end of the support member 4b, there are two pivot points 14 adjacent to the front and rear when tilting forward and backward, and the forward pivot point 14a and the rear pivot point 14b are recessed. Yes. However, the rotation fulcrum 14 of the operating means 4 is also formed separately on the left and right according to the shape of the frame 15, as with the movable contact 8.

A frame 15 that supports the support member 4 b and the movable contact 8 is disposed in the case 10. The frame 15 includes a left side plate 15a, a right side plate 15b, and a connecting plate 15c. The left and right side plates 15a and 15b are arranged in parallel and connected to each other at the rear portion by the connecting plate 15c.
In addition, a pair of rotation shafts (second rotation shafts) 16 that support the rotation fulcrum 14 of the operating means 4 are respectively provided on the outer surfaces of the left and right side plates 15a and 15b so as to be opposed to the left and right side plates 15a and 15b. A pair of rotation shafts (first rotation shafts) 17 that support the rotation fulcrum 12 of the movable contact 8 are provided on the inner side.

  Further, the movable contact 8 and the operating means 4 are connected to each other by an extended coil spring 20 to form a toggle mechanism. By this coil spring 20, the movable contact 8 is urged upward in close contact with the first rotation shaft 17, and the operation means 4 is maintained in a state of being urged downward in close contact with the second rotation shaft 16.

  In the OFF state in which the movable contact 7 does not contact any of the fixed contacts 6, the operating handle 4a arranged so as to stand upright with the hanging portion of the blade 8a having the movable contact 7 is arranged in a straight line. As shown, it is disposed on the central axis M of the operation handle 4a. In this OFF state, the rotation fulcrums 14a and 14b before and after the operation means 4, and the front rotation fulcrum 12a and the rear rotation fulcrum 12b of the movable contact 8 are symmetrical about the central axis M. Arranged and maintained in this straight line by the action of the coil spring 20.

In the frame 15, a switching mechanism for interlocking the set of operating means 4 and the movable contact 7 is configured. As shown in FIG. 3, one frame 15 is assembled to the first case member 10a. A one-pole switching mechanism is accommodated. Thus, in the form of FIG. 1 that opens and closes the three electric circuits, the three frames 15 are assembled into the case 10 using the first to third case members 10a to 10c, and the three switching mechanisms are accommodated. ing.
However, the operation handle 4a of the operation means 4 is formed as one wide handle by integrating the three operation handles 4a.

  FIG. 4 shows a state where the operation handle 4a is tilted backward, that is, the operation means 4 is rotated rearward and the switching source terminal 1 is connected to the rear second system terminal 3. When the operation means 4 is rotated backward by a predetermined angle, the movable contact 8 is instantaneously rotated backward by the action of the toggle mechanism, and the movable contact 7 contacts the rear fixed contact 6. After that, the coil spring 20 is brought into close contact after the contact. Note that the operation of connecting the switching source terminal 1 to the first system terminal 2 is performed by tilting the operation handle 4a forward, and similarly, the close contact between the movable contact 7 and the fixed contact 6 is maintained by the action of the toggle mechanism. .

As described above, since the rotation fulcrum 12 of the movable contact 8 and the first rotation shaft 17 supporting the rotation fulcrum 12 are provided at two positions in the front and rear, the movable contact 7 does not contact any of them. In the off state, the two rotation fulcrums 12 (the front rotation fulcrum 12a and the rear rotation fulcrum 12b) and the two first rotation shafts 17 and 17 are in an engaged state, and the movable contact 8 is stable. An off state can be realized.
Further, since the toggle mechanism is directly formed between the movable contact 8 and the operation means 4, a space for providing a separate toggle mechanism is not required. Furthermore, since the movable contact 8 is reliably pressed against the two first rotating shafts 17 and 17 even in the off position by the elastic force of the coil spring 20, a stable off state can be ensured.

  In addition, although the said embodiment demonstrated the structure provided with the 3 pole which switches 3 lines simultaneously applicable to a three-phase electric circuit, when switching 2 lines simultaneously, what is necessary is just to comprise each terminal with 2 poles. The number of frames 15 stored in 10 is two.

  1 .... Switching source terminal 2 .... First system terminal 3 .... Second system terminal 4 .... Operation means 4a ... Operation handle 4b ... Support member 6 .... Fixed contact 7 ... Movable contact, 8 ... movable contact, 8a ... blade, 8b ... base member, 10 ... case, 12 ... rotation fulcrum (movable contact rotation fulcrum), 12a ... front rotation fulcrum, 12b ..Back side rotation fulcrum, 14 .... Rotation fulcrum (operation means rotation fulcrum), 15 .... Frame, 16 .... second rotation axis, 17 .... first rotation axis, 20 .... coil spring.

Claims (2)

The fixed contacts are arranged so as to be opposed to the front and rear two places, and a pair of movable contacts are arranged between the two, and when the operation means placed upright is tilted forward or backward, the movable contacts are attached. A switching switch in which the movable contact is selectively tilted forward or backward, and the movable contact comes into contact with one of the fixed contacts to switch between the two circuits.
The movable contact rotates around a movable contact rotation fulcrum to switch the fixed contact with which the movable contact contacts, while the movable contact rotates around the movable contact A frame having a first pivot shaft for supporting the fulcrum is disposed;
The movable contact rotating fulcrum has two front and rear supporting points: a front rotating fulcrum that becomes the center of rotation when rotating forward and a rear rotating fulcrum that becomes the center of rotation when rotating backward. And arranged adjacent to,
The switching switch according to claim 1, wherein the first rotation shaft is provided at two front and rear positions corresponding to the movable contact rotation fulcrum. The operating means has an operating means rotating fulcrum at the lower end, while the frame is provided with a second rotating shaft that supports the operating means rotating fulcrum,
The movable contact is vertically arranged in a portion overlapping the operation means, and has a movable contact rotating fulcrum at the upper end base and the movable contact at the lower tip.
The operating means turning fulcrum is disposed below the movable contact turning fulcrum, and both the movable contact and the operating means are connected by a coil spring extended in the vertical direction,
2. A switching switch according to claim 1, wherein said operating means and said movable contact are pressed against each of said rotating shafts by a contracting force of said coil spring to form a toggle mechanism.

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