JP3219557B2 - 2-way switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

2. Description of the Related Art When a U-shaped spring piece is fitted and integrated with a rotor and a rotating contact is provided around a shaft inside the casing, when an external force from the right or left (two directions) is applied to the projection, the projection is rotated. The rotating contact rotates left or right, and the contact of the rotating contact pressed against the fixed contact in the casing is separated (switch closed (ON) → open (OFF)), and contact (switch open (OFF) → closed (O)
N)) To provide a two-way switch (normally closed type) which is adapted to operate.

[0002]

2. Description of the Related Art Conventionally, when a switch incorporated in various devices is operated by an external force, most of the switches are turned on and off by applying an external force from one direction such as left, right, front and rear, and up and down.

However, recently, related devices such as CDs, FDs, video cassettes, and tape cassettes, printers, FAs, and the like have been developed.
In a paper processing mechanism such as X, two directions (left ← → right, front ←
There is an increasing need for a two-way switch that uniformly opens and closes the switch in two directions with an external force from →→ upward → down.

[0004] However, in order to meet the above demand,
In particular, a very compact two-way switch with high precision and excellent durability has not yet been provided, and development of such a two-way switch has been a major issue.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems. That is, the present invention provides a rotor in which a projection is formed at the center of the upper surface and a U-shaped recess is formed downward around the center axis (or center hole), and a narrow spring piece is bent into a U shape. A U-shaped spring piece is provided in which the mounting spring piece and the contact spring piece having the tip as the contact point are formed symmetrically.

A U-shaped spring piece is fitted into the U-shaped recess of the rotor, and the right and left mounting spring pieces are compressed, and the tips (contacts) of the left and right contact spring pieces are projected below the rotor. A rotating contact is provided by binding and integrating the two,

The rotary contact is rotatably mounted around a central axis (or a central hole) in a casing.
A two-way switch configured by projecting the protrusion upwardly of the casing and pressing the contacts of the left and right contact spring pieces against the left and right fixed contacts in the casing with the resilient force of the contact spring pieces.

By rotating the rotating contact to the left or right by external force from the right or left to the projection protruding out of the casing, the contact and the fixed contact are separated (switch closed (O
The problem is solved by a two-way switch provided so as to open (N) → open (OFF)) and contact (switch open (OFF) → closed (ON)).

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a U-shaped recess 4 formed around the center axis 3 (or center hole). A rotor 1 and a U-shaped spring piece 5 in which a narrow spring piece is bent into a U-shape, and a contact spring piece 6 having tips a and b and a mounting spring piece 7 formed on the left and right are provided.

A U-shaped spring piece 5 is inserted into a U-shaped recess 4 of the rotor 1.
The left and right mounting spring pieces 7 are compressed, and the tips (contact points a, b) of the left and right contact spring pieces 6 are fitted below the rotor 1 so as to project therefrom. A rotating contact A is provided,

The rotary contact A is rotatably mounted around a central axis 3 (or a central hole) in a casing B so that the projection 2 projects upward from the casing B and the right and left contact spring pieces 6 are formed. Are pressed against the left and right fixed contacts a 'and b' in the casing B by the resilient force of the contact spring piece 6, thereby forming a two-way switch.

The dimensions of the casing of the illustrated two-way switch are 5.0 mm in length, 9.5 mm in width, and 12.0 mm in height. Naturally, larger ones are smaller (eg, 1/2). The following can be easily manufactured.

Reference numerals a "and b" denote terminals which are connected to the fixed contacts a 'and b' and protrude below the casing B.

The specific shape of the rotor 1 is such that a projection 2 of an arbitrary shape is formed at the center of the upper surface, and a central axis 3 (or a central hole) is formed.
As long as the U-shaped concave portion 4 (corresponding to the U-shaped spring piece 5) is formed downward toward the center with respect to, the disk shape shown in the drawing and other arbitrary shapes are used.

The casing B has a rectangular shape as shown in the drawings and any other shape as long as it can accommodate the rotary contact A.

The U-shaped spring piece 5 is formed, for example, by a contact spring piece 6 having contacts a and b formed at the tip thereof in a bilaterally symmetrical manner with a narrow spring piece, and the U-shaped spring resiliently expanding force. The attachment spring piece 7 for integrally connecting the spring piece 5 to the inner surface of the U-shaped recess 4 of the rotor 1 is formed separately in a bifurcated shape (FIG. 3), a U shape (FIG. 4) or the like. Although not shown in the figure, two or more U-shaped spring pieces are overlapped and installed as required for increasing spring pressure or the like.

The means for integrally connecting the U-shaped spring piece 5 to the U-shaped recess 4 of the rotor 1 for forming the rotary contact A includes:
For example, an engaging projection 8 (illustrated example) or an engaging projection formed on the mounting spring piece 7 (illustrated example) or the contact spring piece 6 of the U-shaped spring piece 5 is formed on the inner surface of the U-shaped recess 4. The specific configuration is arbitrary as long as it is a means for integrally connecting the two 1 and 5, such as by engaging with the engaging concave portion 9.

[0018]

For example, when an external force is applied to the projection 2 of the rotating contact A from the right, the rotating contact A rotates left about the central axis 3 so that the left inner surface of the U-shaped recess 4 of the rotor 1 becomes U-shaped.
The contact spring piece 6 and the mounting spring piece 7 (both on the left side) of the shaped spring piece 5 are pressed and bent in the right direction, so that the contact a (switch closed) normally pressed against the fixed contact a 'by spring pressure (O
N) ... normally closed) (switch open (OFF)) from the fixed contact a '.

When the external force of the projection 2 is released, the contact spring piece 6 and the mounting spring piece 7 that have been bent back are resiliently restored, so that the rotating contact A is restored to the right, and the contact a is restored. It comes into pressure contact with the fixed contact a 'and returns to its original state (switch closed (ON)).

Conversely, when an external force is applied to the projection 2 from the left, the same operation as described above is performed, except that the left and right sides are reversed. Closing (ON) is separated (switch open (OFF)) by right rotation of the rotating contact, and returns to normal by releasing external force.

Accordingly, a completely uniform switching action is performed in response to an external force applied to the projection 2 from the right or left direction.

[0022]

[Effect] By simply mounting a rotary contact in which a U-shaped spring piece is fitted to a rotor and integrated into a casing having a fixed contact,
Since the two-way switch of the present invention can be configured, the configuration is simple,
An extremely small, highly accurate, and durable two-way switch can be provided.

Since the U-shaped spring piece is fitted integrally into the U-shaped recess of the rotor by using the spring pressure of the mounting spring piece,
It is possible to form a rotating contact firmly and integrally connected, which cannot be easily removed, so that the rotating contact can be handled as one completed member and housed in a casing, thereby assembling the two-way switch of the present invention. Can be made more efficient.

The contact spring piece constitutes a part of the U-shaped spring piece, and the contact at the tip is always pressed against the fixed contact by the resilience of the spring piece. The switch can be maintained in a charged state, and can exhibit excellent switch characteristics such that the contact state is complete and there is no danger of contact failure, and there is no danger of chattering due to an external impact or the like.

Further, the two contacts are normally closed (normally closed) (switch closed (ON)) to switch open (OF).
In operation F)), since the pressing force due to the rotation of the rotating contact is reliably and firmly performed against the spring pressure of the one contact spring piece and the mounting spring piece, the contact portion between the contact and the fixed contact is formed. Each time the switch is operated, it will be frictionally prying,
Therefore, there is a feature that the contact portion surface is constantly polished and cleaned, and high switch accuracy can be maintained.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing a schematic configuration of an embodiment of a two-way switch of the present invention.

FIG. 2 is a front view and a bottom view of a rotor.

FIG. 3 is a front view and a right side view of a U-shaped spring piece.

FIG. 4 is a right side view of another embodiment of the U-shaped spring piece.

[Explanation of symbols]

 A Rotating contact B Casing a, b Contact a ', b' Fixed contact a ", b" Terminal 1 Rotor 2 Projection 3 Center shaft (or center hole) 4 U-shaped recess 5 U-shaped spring piece 6 Contact spring piece 7 Mounting spring piece 8 Engagement projection (or engagement projection) 9 Engagement recess

Claims (1)

(57) [Claims] 1. A rotor having a projection formed at the center of the upper surface and a U-shaped recess formed downward with respect to a center axis or a center hole, and a narrow spring piece bent into a U-shape. A U-shaped spring piece is provided in which a contact spring piece having a piece and a tip as a contact is formed symmetrically. A U-shaped spring piece is fitted in a U-shaped recess of the rotor, and the left and right mounting spring pieces are compressed and the rotor is rotated. Are fitted in a state where the contacts at the left and right ends of the contact spring pieces protrude below, and the two are connected and integrated to form a rotating contact, and the rotating contact is rotated about its central axis or center hole in the casing. A two-way switch which is freely mounted on a shaft, and whose projections protrude upward from the casing, and wherein the contacts of the left and right contact spring pieces are pressed against the left and right fixed contacts in the casing by the resilient force of the contact spring pieces. And leftward with respect to the protrusion protruding out of the casing. When the rotating contact is rotated clockwise by these external forces, the contact at the right end of the contact spring piece and the right fixed contact in the casing are separated and the switch is turned off, and conversely, the rotating contact is left by external force from the right. When rotating in the direction, the contact at the left end of the contact spring piece and the left fixed contact in the casing are separated and the switch is turned off. When the external force is released, the rotating contact is restored to the original position by the elastic restoring force of the contact spring piece. The two-way switch is provided so that the switch is turned on.