JPS5930989Y2 - digital switch - Google Patents

Description

[Detailed description of the invention] The present invention relates to a reversible walkway digital switch in which a rotary plate holding a movable contact piece is advanced by the pressing operation of a push button part, and in particular, a digital switch as described above which holds two pressing parts. Related to reversible step digital switches.

Digital switches are used as signal input devices for devices that operate using digital signals, such as control devices using microcomputers.

The digital switch has an output terminal corresponding to a desired number of bits such as 4 bits, 8 bits, IO bits, etc., and also has a display section that displays, for example, 1 to 12 in decimal notation using a push button. If you want to obtain a binary signal corresponding to the modulus 2, press the button several times to display 2 on the display.
For example, 000000 is displayed from the output terminal.
10 signals are obtained.

By the way, the conventional digital switch mentioned above differs from ordinary switches such as power switches in that the positioning mechanism and the mechanism for transmitting the press operation of the push button to the movable contact piece are complicated, so there are many moving parts and the frictional force is large. The push button is heavier than a normal push button switch.

In particular, the push button that advances 1, 2, 3...
...3, 2.1 A reversible walkway with a push button that moves forward requires a large amount of pressing force from the push button.

The present invention was developed in view of the above-mentioned circumstances, and its purpose is to provide a reversible digital switch that has a good switching feel and can be operated with light operating force.

Next, nine practical examples of the present invention will be explained in detail with reference to the drawings.

FIG. 2 is an exploded perspective view of the digital switch according to the present invention, and in the figure, 1 is a case made of synthetic resin.

Case 1 is formed into a bar shape with both sides open, and frame I
It has A, I B, I D, I E, and one of its essences is 1A.
Holes 1a, 1a for protruding push button portions of two operating members, which will be described later, are formed in the holes 1a, 1a.

Further, on the inner surface of the frame 1C, there are protrusions 1b, lb at positions facing the holes 1a, 1a, and elastic pieces 1c extending to a height approximately between the edges of the frame at a position slightly inward of the protrusions 1b. ,1
c is erected integrally with the frame 1C of the case 1.

As clearly shown in FIG. 2, protrusions 1C-1 are formed at the tips of the elastic pieces 1c, lc so as to protrude inward from each other.

Furthermore, a protrusion 1C-2 is formed on the opposite side of the protrusion 1C-1.

Inside the frames 1A and 1D, a stepped portion 1d for positioning a terminal plate, which will be described later, is provided, and the frame 1E has a notch 1d.
e is formed.

2.2 is an operating member.

The operating member 2 consists of a push button part 2a and an operating part 2b, and the operating part 2b has an inverted-shaped branch that branches approximately parallel to the operating part 2b and applies elastic force laterally. Branch piece 2b-
1, and a spring storage portion 2b-2 is formed at the lower end.

Further, a locking pawl 2b-3 is formed at the tip of the branch piece 2b-1.

Further, a recess 2b-4 is formed on one side of the operating portion 2b at a right angle to the side surface on which the branch piece 2b-1 is formed, and a recess 2b-4 is provided with a protrusion 2C for guiding the protrusion 1C-2 provided on the elastic piece 1C. There is.

3 is a pair of terminal boards, with a shaft hole 3a bored in the center of the board;
A common fixed contact portion 3b and a switching fixed contact portion 3C are formed on one side of the insulating substrate concentrically with the shaft hole 3a, and these fixed contact portions are each led out to the lower edge side of the terminal plate 3 by a conductive portion 3d. has been done.

A pair of small holes 3e are formed at each end of the conductive portion 3d.

4 is a terminal for external connection formed in a single character shape.

Reference numeral 5 denotes a rotary plate that holds the movable contact piece 6, and an oval-shaped shaft hole 5b is bored in the center of the flat plate part, and a plurality of recesses 5C for storing the movable contact piece 6 and the shaft hole 5b are formed on the negative side. A pair of retaining pieces 5 d and 5 d are protruded around the periphery.

At the tips of the retaining pieces 5d, engaging claws 5 facing outward from each other are provided.
e, 5e are formed.

This retaining piece 5d is fitted into the shaft hole 3a of the terminal plate 3.

Reference numeral 6 denotes a movable contact piece bent in a ■-shape, and includes a holding part 6a having the same shape as the concave part 5C of the rotary plate 5, and a plurality of branches that connect the common fixed contact part 3b and the switching fixed contact part 3C of the terminal plate 3. It consists of a switching contact section 6b that straddles between them and moves while sliding on them.

A cam plate 7 has cam teeth 7a formed on its outer periphery, and supporting shafts 7b and 7C having an oval cross section are formed protruding from both sides of the center.

Although not shown in the figure, the support shaft 7C is longer than the support shaft 7b in order to mount a display board with numbers displayed in decimal notation.

Reference numeral 8 denotes a return coil for the operating member 2. Next, a method for assembling the digital switch according to the present invention will be explained.

First, the operating member 2 is inserted into the hole 1a bored in the case 1 from the inside to the outside so that the push button part 2a protrudes outward, and the branch pieces 2b-1 and 2b-1 are placed facing each other, The elastic pieces 1C formed integrally with each case 1 are assembled into the recesses 2b-4 provided in the case 1 in a state where they are engaged with the protrusions 1C-2, and the spring storage portions 2b-2 provided at the ends of each operating portion 2b and the case 1 A return coil spring 8 is installed between the projection 1b and the projection 1b provided on the bottom surface.

Next, one end is inserted into the small hole 3e of the terminal plate 3 and the terminal 4 is caulked, and the rotary plate 5, which holds the movable contact piece 6 in the recess 5C of the flat plate part 5a, is attached to the terminal plate 3, and its engagement piece 5d is attached to the terminal plate 3. It is inserted into the shaft hole 3a of the terminal plate 3 and rotatably mounted in a snap-in manner using the engaging claw 5e.

The terminal plate 3 assembled in this way is placed so that the rotating plate 5 is located inside, and the outer periphery of the terminal plate 3 is brought into contact with the stepped portion 1d on one side of the case 1, and the notch 1e is The terminal 4 is mounted so as to protrude to the outside, and the support shaft 7b of the cam plate 7 is inserted into the shaft hole 5b of the rotating plate 5 to be assembled.

At this time, the protrusions I C-1 of the elastic pieces 1c and 1c are attached to the cam teeth 7a.
, IC-1 is in elastic contact from both sides.

Then, the locking claw 2b-3 of the branch piece 2b-1 of the operating portion 2b
is located above the center of the cam plate 7, close to and above the cam teeth 7a.

Next, attach the terminal plate 3 to the other side of the case 1 in the same manner as above.
Attach it and finish the assembly.

Note that FIG. 3 is a front view showing the inside of the assembled digital switch, and FIG. 4 is a perspective view of its exterior.

Next, the operation of the digital switch of the present invention will be explained.

As shown in FIG. 5, one push button part 2a of the operating members 2, 2
When pressed in the direction of the arrow against the spring pressure of the return coil spring 8, the integrally formed branch piece 2b-1 descends, and the locking pawl 2b-3 formed at its tip engages the cam plate 7. comes into contact with the cam teeth 7a.

When pressed further, the locking pawl 2b-3 follows the cam tooth 7a due to the elasticity of the branch piece 2b-1, and at the same time as the cam tooth 7 begins to rotate due to the lowering of the locking pawl 2b-3, the locking pawl 2b-3 is attached to the elastic piece 1C. The elastic piece 1C is located in the concave part 2b-4 of the protrusion 1C-2, reaches the protrusion part 2C from the straight line part, and as the operating part 21] descends, the elastic piece 1C moves in a direction away from the cam teeth 7a, 7a, and reaches the protrusion part 1C-2. 1 is disengaged from the cam teeth 7a, 7a.

As a result, the cam plate 7 is given moderation in a state in which it is in elastic contact with only one of the elastics 1C, and the cam teeth 7 can be pressed with a small actuation force.

When pressed further, the protrusion 1C-2 reaches a straight line from the apex of the protrusion, and as a result, the elastic piece 1C returns to its original position, the protrusion 1C-1 comes into contact with the cam teeth 7a, 7a again, and the cam plate 7 It is elastically contacted from both sides by elastic pieces 1C1C.

As a result, the stepped cam plate 7 is reliably positioned.

Further, in the switch circuit, a movable contact piece 6 housed in a rotary plate 5 integrally connected to a cam plate 7 sequentially slides on a common fixed contact part 3b and a switching fixed contact part 3C on the terminal plates 3, 3. By doing so, circuit switching is performed.

Then, when the pressure is released, the protrusion 1C-2 is moved to the recess 2b-4.
However, since the cam plate 7 is engaged with the protrusion 1C-1 of the elastic piece on the other side, it maintains the same position, and only the operating member 2 returns. do.

That is, according to the present invention, a pair of elastic pieces lc and l are provided in the case 1.
c, and a protrusion 1C-2 is formed at the end of the elastic pieces 1c, 1c.
and the protrusion 1C is provided on the operating portion 2b of the operating member 2.
- form a four part 2b-4 provided with a protrusion for guiding the
When the protrusion 1C-2 is guided in the outward and return directions, the protrusion 1C1 of the elastic piece 1C is made to come out of elastic contact with the cam teeth 7a of the cam plate 7. Therefore, when the push button is operated, the cam plate 7 only has one elastic member. Since moderation is provided only by one of the pieces 1C, the button can be operated with light actuation force, and a digital switch with light actuation force can be realized.

In addition, the protrusion 1C-2 comes into contact with the protrusion of the recess 2b-4 each time the push button 2a is pressed and returned to provide a switching feel, and the elastic piece 1C is formed integrally with the case 1, making it special. It is possible to obtain an inexpensive digital switch without having to prepare any parts.

In the above embodiment, the operating member 2 is provided with a recess 2b-4 having a protrusion 2C, and when the operating member 2 operates, the protrusion 2C in the recess 2b-4 connects to the protrusion 1C of the elastic piece 1C. -1
The elastic piece 7 has a recess with a protrusion, and a protrusion is provided on the operating member 2 side, so that when the protrusion is guided in the outward and return directions, one of the elastic Of course, it is also possible to configure the protrusion of the piece so that it escapes from the cam teeth of the cam plate.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of a digital switch according to the present invention, FIG. 2 is a perspective view showing a part of the operating member and the elastic piece, and FIG.
The figure is a front view showing the inside of the assembled digital switch, FIG. 4 is a perspective view of its appearance, and FIG. 5 is a front view illustrating its operation. 1...Case, 1A-1E...Frame, 1
a, 1a'...hole, 1b...protrusion, 1
C...Elastic piece, 1C-1...Protrusion, 1
C-2...Protrusion, 1d...Step, 1e
...Notch, 2... Operation member, 2a.
...Push button section, 2b...Operation section, 2b-1
...branch piece, 2b-2...spring storage section, 2b-3...locking claw, 2b-4...
Recessed part, 2C...Protruding part, 3...L...Terminal plate, 3a...Shaft hole, 3b...Common fixed contact part, 3C...・Switching fixed contact part, 3d...
... Conductive part, 3e ... Small hole, 4 ... Terminal, 5 ... Rotating plate, 5a ... Flat plate part,
5b...Shaft hole, 5C...Concavity, 5d.
...Engagement piece, 5C...Engagement claw, 6...
...Movable contact piece, 6a...Holding part, 6b...
...Switching point section, 7...Cam plate, 7a...
...Cam teeth, 7b, 7C... Support shaft, 8...
... Spring for return.

Claims (1)

[Scope of utility model registration request] The operating member is housed so that it can be moved up and down, with a push button protruding outward from the case and a return force applied by a spring.
A branch piece is integrally formed with a branch piece that is branched approximately parallel to the operating member to provide lateral elasticity and has a locking claw at the end, and is connected to the rotary plate supported within the case. The locking pawl of the branch piece is made to face the cam tooth that rotates integrally, and when the operating member is pushed, the locking pawl pushes the cam tooth and moves the cam tooth by a predetermined angle. None, and a pair of elastic pieces are integrally formed in the case, and a protrusion provided at each end of the elastic pieces is pressed by the cam teeth, and either the elastic piece or the operating member One side is provided with a protrusion, and the other side is provided with a recessed part with a protrusion that guides the protrusion, so that the protrusion of one elastic piece escapes from the cam teeth of the cam plate when the protrusion is guided in the outward and return directions. A digital switch characterized by: