JPH0244090B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a switch that opens and closes by swinging a movable piece.

(Prior art) This type of conventional tumbler switch, for example, is disclosed in Japanese Utility Model Application Publication No. 54-121277 or
As described in Publication No. 53020, a fulcrum part is formed on one terminal fitting, a movable piece is swingably supported on this fulcrum part, and a contact plate for the movable piece is formed on the local terminal fitting. , these are housed in the main body, and an operating body and the like are attached to the upper part of the main body. Tumbler switches with these structures have a bent part at the lower end of the movable piece,
If the movable piece is not oriented in the correct direction, that is, the contact point of the movable piece and the contact point of the contact plate part are facing each other, the bent part will catch on the main body etc. and the structure will not be supported on the fulcrum part. , which prevented reverse assembly of the movable piece.

However, in this structure, since the movable piece is bent, manufacturing is troublesome and the processing accuracy is poor.Furthermore, even when assembled in the correct direction, the bent piece tends to get caught, making assembly work difficult. There was a problem that it was bad.

In addition, in the conventional structure shown in the above publication, the width of the fulcrum part of one of the terminal fittings that supports the movable piece is the same as the width of the connection part with this terminal fitting. Therefore, when the width of the connecting portion is restricted, the width of the fulcrum portion also becomes narrow, which causes problems in that the movable piece tends to become unstable and the electrical resistance tends to increase.

(Problems to be Solved by the Invention) As mentioned above, in the case of conventional switches, the movable piece is bent, so there are problems with the manufacturing and processing accuracy of the movable piece. In some cases, the width of the fulcrum part that supports the movable piece cannot be ensured, which causes problems such as the movable piece becoming unstable and the electrical resistance increasing.

The present invention was made in view of these problems, and it facilitates the manufacture of a movable piece, improves processing accuracy, stabilizes the movable piece, and reduces electrical resistance. The purpose is to improve assembly work efficiency and ensure work stability.

[Structure of the invention]

(Means for Solving the Problems) The switch of the present invention has an insulating main body with terminal accommodating parts formed at both ends, and a switch that is stored in one accommodating part of the main body and located between the other accommodating part. one terminal fitting formed by connecting a movable piece fulcrum part to the other terminal fitting, a movable piece swingably supported on the fulcrum part connected to this one terminal fitting, and a movable piece stored in the other storage part of the main body. The other terminal fitting has a contact plate connected to the movable piece, and an operating body provided on the main body to swing the movable piece, and the width of the fulcrum part of one terminal fitting is set to the width of the connecting part with the terminal fitting. A pair of protrusions having different widths are formed on the lower side edges of the movable piece to engage with both side edges of the fulcrum part, and outer edges of the pair of protrusions are formed on the inner wall of the main body. A mis-insertion preventing portion is formed to face the erroneous insertion portion with a slight distance between the erroneous insertion portion and the erroneous insertion portion.

(Function) In the switch of the present invention, the movable piece is swung on the fulcrum of one of the terminal fittings by the operating body, thereby bringing the movable piece into contact with and separating from the contact plate of the other terminal fitting. be. If the movable piece is not oriented in the correct direction, the wider protrusion at the bottom of the movable piece will get caught between the incorrect insertion prevention part and the fulcrum part on the inner wall of the main body, thus preventing reverse installation of the movable piece. I can do it, and also.
When properly assembled, the movable piece is stably supported by the wide fulcrum.

(Embodiment) An embodiment of the switch of the present invention will be described with reference to the drawings.

In FIGS. 1 to 3, reference numeral 1 denotes a box-shaped main body, which is integrally formed of insulating synthetic resin. Terminal storage areas 2 and 3 are provided at both ends of the main body 1.
is divided. A pair of wire insertion holes 4 and 5 are formed in the bottom of the main body 1 so as to face the respective terminal storage sections 2 and 3.

Reference numeral 6 denotes one terminal fitting housed in one terminal accommodating portion 2 of the main body 1, and is integrally formed of a conductive metal plate. This one terminal fitting 6 is
As shown in FIG. 4, an upper plate 8 and a contact plate 9 are sequentially bent and connected in a U-shape to the terminal plate 7, and a fulcrum plate 10 is cut from the contact plate 9 via a connecting portion 10a. The movable piece fulcrum part 11 is placed at the tip of this fulcrum plate 10.
is bent so that its width is wider than the width of the connecting portion 10a. The connecting portion 10a is disposed in a groove portion 1c formed in a partition wall 1b between one terminal storage portion 2 and a movable piece placement portion 1a between both terminal storage portions 2 and 3. This groove portion 1c is the connecting portion 1
The partition wall 1 is formed to have a width that allows the partition wall 1
Both edges of the groove portion 1c of b act as a stopper for the movable piece 14, which will be described later.

A pair of locking pieces 12 made of spring plates are mounted inside the terminal fitting 6 with their locking tongues 13 facing the terminal plate 7 and their backs abutting and supporting against the abutting plate 9.

Further, a movable piece 14 made of a conductive metal plate is swingably supported on the movable piece fulcrum portion 11. As shown in FIGS. 5 and 6, this movable piece 14 has a movable contact 15 attached to the other surface. Further, a spring locking portion 17 having a protrusion 16 formed in the center is provided at the upper end of the movable piece 14, and a pair of spring locking portions 17 that engage with both side edges of the movable piece fulcrum portion 11 are provided at the lower portions of both side edges thereof. protrusion 18,
19 are formed with different widths and different lengths.

The inner wall of the main body 1 relative to the outer edge of each of the protrusions 18 and 19 has a width that matches the width of each of the protrusions 18 and 19 so that there is a slight gap between the outer edges of each of the protrusions 18 and 19. Insertion guide parts 22, 23 are formed on the upper part of the erroneous insertion prevention parts 20, 21 to face the protrusions 18, 19. ing.

Reference numeral 24 designates the other terminal fitting housed in the other terminal accommodating portion 3 of the main body 1, and is integrally formed of a conductive metal plate. This other terminal fitting 24
An upper plate 26 and a contact plate 27 are sequentially bent and connected to the terminal plate 25 in a U-shape, and an L-shaped contact plate 28 is bent and connected to the contact plate 27. A fixed contact 29 corresponding to the movable contact 15 is attached to the tip.

A pair of locking pieces 30 made of a spring plate are mounted in the other terminal fitting 24 with their locking tongues 31 facing the terminal plate 25 and their backs abutting and supporting the abutting plate 27. There is.

A cover 32 is attached to the upper opening of the main body 1. This cover 32 is integrally formed of insulating synthetic resin, and has an operation window hole 3 in the center.
3 is provided, and an operating body 34 is connected to the movable piece 1 by means of support shafts 35 protruding from both sides of the center of the operating body 34.
It is rotatably mounted on an axis with a space between it and 4. A spring engagement hole 36 is formed in the center of the lower part of this operating body 34, and the upper end of a coil spring 37 is inserted into this spring engagement hole 36, so that the inner bottom surface of the spring engagement hole 36 and the movable piece 1
A coil spring 37 is stretched between the spring locking portion 17 of the locking portion 17 and the spring locking portion 17 of the locking portion 17.
6 is fitted with the lower end of the coil spring 37,
The rotation of the operating body 34 causes the movable piece 14 to rotate via the coil spring 37, thereby bringing the movable contact 15 into contact with and away from the fixed contact 29.

38 and 39 are unlock buttons.

Then, the wires are inserted through the wire insertion holes 4 and 5 of the main body 1, and are clamped between the terminal plates 7 and 25 of the terminal fittings 6 and 24 and the locking tongues 13 and 31 of the locking pieces 12 and 30. to make mechanical and electrical connections.

Also, push the unlock buttons 38 and 39 and lock piece 1.
The electric wire can be extracted by deforming the locking tongues 13 and 31 of 2 and 30.

For operation, in Fig. 1, the operating body 3
When the protruding side of the movable piece 14 is pushed downward until it is almost horizontal, the operating body 34 begins to rotate around the support shaft 35 and changes the direction of the coil spring 37, but the upper end of the movable piece 14 and the operating body The coil spring 37 is bent in the space between the lower end of the coil spring 34, the movable piece 14 does not move, and the movable contact 15 remains separated from the fixed contact 29. From this state, when the operating body 34 is pushed further downward, The movable piece 14 begins to reverse, and at this time the operating body 34 is tilted in the opposite direction to the direction shown in the figure, and the operating body 34 and the movable piece 14
is reversed by the restoring force of the coil spring 37, and the fixed contact 29 and the movable contact 15 come into contact.

Furthermore, during assembly, since the movable piece 14 is flat, it will not get caught on the inner wall of the main body 1 when the movable piece 14 is assembled. 18 and 19 are guided by the insertion guide portions 22 and 23 of the main body 1, so assembly is easy.Furthermore, after the movable piece 14 is supported on the fulcrum portion 11 of one of the terminal fittings 6, Since the width of the movable piece 14 is wide, the movable piece 14 is difficult to move in both directions, that is, in a direction perpendicular to its original swinging movement direction, and is in a stable state.
It also becomes easier to engage.

Then, when assembling the movable piece 14, the movable piece 14
If the movable contact 15 is in the opposite direction, that is, the movable contact 15 is facing one of the terminal fittings 6, the wider protrusion 18 will be between the incorrect insertion prevention part 21 of the main body 1 and the fulcrum part 11. Since the movable piece 14 will not be able to be installed because it will get caught and the movable piece 14 will be tilted, reverse installation of the movable piece 14 can be prevented.

In addition, when in use, since the width of the fulcrum part 11 of one terminal fitting 6 is widened, the fulcrum part 11 and the movable piece 1
4, the electrical resistance is reduced, the wear of the contact portion is reduced, blackening due to arcing and deterioration of conductivity can be prevented, and heat generation is also reduced. Moreover, since the movable piece 14 is also difficult to move in directions other than the original swinging motion direction, the motion is stable and the operating feeling is improved.

Further, even if the fulcrum portion 11 supporting the movable piece 14 is formed to have a wide width, the connecting portion 10a has a narrow width, so that the movable piece 14 can be prevented from falling toward one terminal storage portion 2 side. That is, if the contact area between the movable piece 14 and the fulcrum part 11 is increased and the connecting part 10a is formed to have the same width, there will be a problem that the movable piece 14 will collapse into one terminal storage part 2.

In this embodiment, as shown in FIG. 5, the movable piece 14 has a pair of projections 1 having different lengths.
Misinsertion prevention parts 40 and 41 may be provided at the bottom of the main body 1, opposing the lower ends of the main body 1 with a certain distance.

〔Effect of the invention〕

As described above, according to the present invention, the movable piece supported by the fulcrum is provided with a pair of protrusions that engage with both side edges of the fulcrum, and the pair of protrusions are formed to have different widths. Misinsertion prevention parts are formed on the inner wall of the main body, opposing the outer edges of the pair of protrusions with a small distance between them, and this prevents the movable piece from being reversely assembled. can be,
Therefore, press efficiency can be increased by eliminating the bending process used in conventional manufacturing of movable pieces.Moreover, since there is no bending process, the machining accuracy of the movable piece is improved; It can be easily installed and operates stably.

Further, according to the present invention, since the width of the fulcrum portion that supports the movable piece is secured and widened, in addition to the above-mentioned effects, the movable piece is in a stable state after the movable piece is assembled. This not only makes it easier to assemble the operating body afterwards, but also reduces electrical resistance, reduces wear on contact parts, prevents blackening due to arcing and deterioration of conductivity, and reduces heat generation. , the movement of the movable piece is stabilized, and the operation feeling is improved.

[Brief explanation of the drawing]

The figures show one embodiment of the switch of the present invention, in which Fig. 1 is a side view and vertical sectional view, Fig. 2 is a plan view of its main body, and Fig. 3 is the same as in Fig. 2.
4 is a plan view of one of the terminal fittings, FIG. 5 is a front view of the movable piece, and FIG. 6 is a side view of the movable piece. DESCRIPTION OF SYMBOLS 1... Main body, 2, 3... Terminal storage part, 6... One terminal fitting, 10a... Connection part, 11... Movable piece fulcrum part, 14... Movable piece, 18, 19... Projection, 20, 21... Erroneous insertion prevention section, 24... Other terminal fitting, 28... Contact plate, 34... Operating body.

Claims (1)

[Scope of Claims] 1. Connecting an insulating main body with terminal accommodating parts formed at both ends and a movable piece fulcrum part stored in one accommodating part of this main body and located between the other accommodating part. One of the formed terminal fittings, a movable piece swingably supported on a fulcrum connected to the one terminal fitting, and a contact plate stored in the other housing of the main body and connected to the movable piece. the other terminal fitting; and an operating body provided on the main body to swing the movable piece; A pair of protrusions having different widths are formed at the lower side edges of the piece to engage with both side edges of the fulcrum part, and a small space is formed at the outer edges of the pair of protrusions on the inner wall of the main body. A switch characterized by forming opposing incorrect insertion prevention parts.