JPH0644865A - Intermittent open/close switch - Google Patents

Abstract

PURPOSE:To provide an intermittent open/close switch which makes a circuit on and off at every right and left intermittent (click) rotation by making the right and left click rotation of the ratchet wheel of a ratchet drive so that a seesaw plate having contact spring pieces tilts right or left and its contacts are connected to or disconnected from fixed contacts. CONSTITUTION:An intermittent open/close switch is provided with a ratchet drive 4 where the claw 2 such as the center curved portion of an angle blade spring piece or the like is engaged with the tooth 3 of a ratchet wheel 1 so as to make the right and left intermittent (click) rotation of the ratchet wheel 1. An engaging spring piece 10 having a curved protrusion 9 in the center portion and a contact spring piece 11 equipped with contacts a, b and c, d on right and left tips are fitted in parallel to a seesaw plate 8 making seesaw movement taking a spindle 7 as a center. The curved protrusion 9 of the engaging spring piece 10 of the seesaw plate 8 is engaged with the tooth 3 of the ratchet 1. The contacts b, d of the contact spring leaf 11 are pressed to fixed contacts B, D, and the contacts a, c are faced to fixed contacts A, C keeping the space of set length L.

Description

Detailed Description of the Invention

[0001]

2. Description of the Related Art Conventionally, a claw 2 such as a mountain portion of a mountain-shaped leaf spring piece
Is provided with a ratchet device 4 that engages with the teeth 3 of the ratchet 1 to intermittently rotate the ratchet 1 from side to side.
Is provided with a slider 6 (horizontal movement in the horizontal direction) having a protrusion 5 that engages with the leaf switch S _{1, which is} composed of two parallel contact spring pieces facing the left and right ends of the slider 6.
The intermittent open / close switch (click stop switch, step switch) including (contacts A, B) and S ₂ (contacts C, D) is widely used mainly as a panel switch for video and the like. (See FIG. 4) The above-mentioned conventional intermittent open / close switch is a two-circuit two-contact switch, and its operation is as follows. Stopper wheel stop: Both A-B and C-D are OFF Left rotation: A-B only, ON-OFF operation every 1 click Right rotation: C-D only, ON-OFF operation every 1-click

Since the above-mentioned conventional device has a structure in which two leaf switches are incorporated in the case 16 in addition to the ratchet device and the slider, it is inevitably large in size and small in size. There are limits to the number of manufacturing processes, many manufacturing processes, and high cost.

In the built-in leaf switch, it is difficult in terms of manufacturing technology to provide the distance between the two contact spring pieces, that is, the distance between the contacts A, B and C, D, accurately and evenly, without variation among the switches. In order to avoid erroneous operation due to chattering, it is unavoidable to set a sufficiently wide interval, so that the above-mentioned variation is further increased, and high-precision switch performance cannot be obtained.

[0004]

The present invention has been made to solve the above-mentioned conventional problems. That is, the present invention is provided with a ratchet device that engages a claw such as a mountain portion of a chevron leaf spring piece with a tooth of a ratchet wheel to intermittently (click) rotate the ratchet wheel to the left and right,
An engaging spring piece having a chevron protrusion in the center and a contact spring piece having contacts A, B and C, D at the left and right ends are attached in parallel to a seesaw plate that performs a seesaw movement around a spindle.
The chevron protrusions of the engaging spring pieces of the seesaw plate are engaged with the teeth of the ratchet wheel, and the contacts b and d of the contact spring pieces are fixed contacts B and D.
The problem is solved by an intermittent open / close switch in which the contacts a and c are pressed against the fixed contacts A and C and face each other with a set dimension.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIGS.
Is provided with a ratchet device 4 for intermittently rotating (clicking) the ratchet 1 to the left and right, and a seesaw plate 8 that makes a seesaw motion about a support shaft 7 is provided with a chevron protrusion 9 at the center. The engaging spring piece 10 and the contact points a, b and c at the left and right ends,
The contact spring pieces 11 provided with d are attached in parallel, the chevron protrusions 9 of the engaging spring pieces 10 of the seesaw plate 8 are engaged with the teeth 3 of the ratchet wheel 1, and the contact points b and d of the contact spring pieces 11 are attached. Is pressed against the fixed contacts B and D, and the contacts a and c are opposed to the fixed contacts A and C at a set dimension L to form the intermittent opening / closing switch of the present invention.

In the above structure, the contact spring piece 11 is
Slits 12 are cut on the left and right in the longitudinal direction of the strip-shaped spring piece to form contact pieces a ′, b ′ and c ′, d ′, and the tips of the pieces are used as contact points a, b, c, d. Is.

Further, the seesaw plate 8, that is, the support shaft 7 at the center.
Both ends of the engaging spring piece 10 are attached to the upper ends of the left and right arms 14 and 14 of the seesaw plate 8 provided with protruding arms 14 at the left and right ends of the back plate 13 provided with 11, the central hole 15 is fitted to the protrusion on the support shaft 7, and at the same time, the contact pieces a ′, b ′ and c ′, d ′ are pressed against the lower surfaces of the left and right arms 14, 14 by the spring pressure of the contact pieces. , Is mounted in parallel with the engaging spring piece.

The above is an embodiment of the intermittent opening / closing switch of the two-circuit, two-contact type. However, the intermittent opening / closing switch of the one-circuit, one-contact type also rotates the ratchet wheel 1 only to the left (or right) to make the contact spring piece 11. It can be simply constructed by providing only the contacts a, b (or c, d).

[0009]

Next, the operation of the present invention will be described with reference to the illustrated embodiment. When the ratchet wheel 1 is rotated counterclockwise by an arbitrary external force, the upper teeth 3 of the ratchet wheel 1 engaging with the nail 2 push up the nail 2. It rotates 1 click, but in the process of 1 click rotation, the lower teeth 3
Presses the chevron protrusion 9 of the engaging spring piece 10 engaged with it to the right and tilts the seesaw plate 8 rightward (upward) about the support shaft 7, and at the same time, the teeth 3 and the chevron protrusion. By the slidable guide of the inclined surface of 9, the chevron protrusion 9 bends the engaging spring piece and descends.

When the seesaw plate 8 tilts as described above, the contact spring piece 11 also tilts, and the contact b at the left end thereof (which is in pressure contact with the preliminarily fixed contact B) slides more strongly under pressure. , Contact a rises above the set dimension L, and fixed contact A
And the A-B circuit is turned on.

Still further, when the ratchet wheel 1 is rotated counterclockwise, the chevron protrusion 9 rides over the head of the tooth 3 and engages with the next valley, so that the engaging spring piece 10 is restored to its original state and at the same time, the seesaw plate 8 and the contact spring. The piece 11 is also restored to its original state, the contact a is separated from the fixed contact A, and the switch is turned off (contact b and fixed contact B are kept in pressure contact).

Therefore, when the ratchet wheel 1 is continuously rotated counterclockwise, the circuits AB are turned on and off for each click, and when used as a pulse switch, for example, a pulse of the number of clicks is oscillated. Become.

On the contrary, when the ratchet wheel 1 is rotated to the right, the contacts c and d and the fixed contacts C and D are brought into contact with and separated from each other by the same action as described above, and the switch ON-OFF of the circuit C-D is performed every 1 click. Be seen.

The above operation is summarized as follows. Circuit: 2 circuits 2 contacts Stopper wheel stop: Both AB and CD are OFF Left rotation: AB only, ON-OFF operation every 1 click Right rotation: CD only, ON every 1 click -OFF operation One rotation of the ratchet wheel: 20 clicks

In the case of a one-circuit, one-contact switch, for example,
By rotating the ratchet wheel 1 only to the left, only the circuits A-B are turned on / off for each click.

[0016]

[Effect] Since the chevron protrusion of the engaging spring piece is pushed by the teeth of the ratchet wheel so that the seesaw plate can be tilted to the left and right, the right and left can be accurately tilted by an equal angle, so that an even pressure contact force is applied. The contact a (or c) is pressure-welded (O) to the fixed contact A (or C).
N) and can be separated (OFF) at even timing
Therefore, an accurate switch action can be realized.

In the stopped state, the center of the contact spring piece is supported on the support shaft, and the contacts b and d are fixed to the fixed contacts B and D, and the contact pieces (b ', d') are repulsed. Press it with force,
On the other hand, since the contact pieces a ′ and c ′ are provided with the tip portions of the contact pieces pressed to the lower surface of the arm by elastic force as well, the contacts b and d are completely in contact with the fixed contacts B and D in a so-called charged state. At the same time, since the contact piece a'c 'is pressed against the lower surface of the arm in the same charged state, the distance between the contacts a and c and the fixed contacts A and C can be always maintained at the set distance L. Therefore, the contact (ON) between the contact point a (or c) and the fixed contact point A (or C) due to the tilting of the seesaw plate can be always performed at a uniform tilting angle without variation in each switch.
It can exhibit extremely high precision switch performance.

Further, since the contact piece a'and c'is pressed and supported on the lower surface of the arm, the set dimension L can be accurately set without variation. Therefore, the set dimension L is set to be extremely small (example: 0.2 mm). ), And there is an advantage that a more accurate switch can be constructed extremely compactly.

Further, the contacts b and d are fixed contacts B and d from the beginning.
It is pressed against D, and contacts a and c are fixed contacts A and C.
When the seesaw plate is tilted, the set dimension L is raised to make pressure contact, but the seesaw plate further tilts while maintaining the contact pressure state of both contacts (A and a and B and b or C and c and D and d). Frictionally slides on each fixed contact surface to exert a so-called contact cleaning effect. Therefore, contact failure due to dirt and the like can be eliminated, and good contact continuity can always be obtained.

[Brief description of drawings]

FIG. 1 is a partially cut front view of an embodiment of the present invention.

2A and 2B show the positional relationship between the contacts a, b, c and d of the contact spring pieces and the fixed contacts A, B, C and D, the support shaft, and the arm. Plan view.

FIG. 3 is an explanatory diagram of an operation according to FIG.

FIG. 4 is a diagram showing a schematic configuration of a conventional intermittent open / close switch.

[Explanation of symbols]

a, b, c, d contact point of contact spring piece a ', b', c ', d'contact point of contact spring piece A, B, C, D fixed contact S ₁ , S ₂ Used for conventional switches Leaf switch 1 Claw wheel 2 Claw 3 Tooth 4 Claw wheel device 5 Convex (conventional switch) 6 Slider (conventional switch) 7 Spindle 8 Seesaw plate 9 Chevron protrusion 10 Engagement spring piece 11 Contact spring piece 12 Slit 13 Back plate 14 Arm 15 Central hole 16 Case

Claims (3)

[Claims] 1. A claw wheel device for engaging a claw such as a crest of a chevron leaf spring piece with teeth of a claw wheel to intermittently (click) rotate the claw wheel left and right, and centering around a support shaft. As a seesaw plate that moves as a seesaw, an engaging spring piece having a chevron protrusion at the center and a contact spring piece having contacts a, b and c, d at the left and right ends are attached in parallel, and the seesaw plate is engaged. While engaging the chevron protrusion of the spring piece with the tooth of the ratchet wheel, the contact point b of the contact spring piece,
An intermittent opening / closing switch in which d is pressed against the fixed contacts B and D, and the contacts a and c are opposed to the fixed contacts A and C with a set dimension. 2. The contact spring piece comprises contact pieces a ', b'and c', d formed by cutting slits on the left and right in the longitudinal direction of the strip-like spring piece.
′ Is formed, and each tip portion thereof is used as the contact points a, b and c, d. The intermittent opening / closing switch according to claim 1. 3. A seesaw plate provided with arms protruding from the left and right ends of a back plate having a support shaft at the center, and both ends of the engaging spring pieces are attached to the upper ends of the left and right arms, and contact spring pieces are provided. To
At the same time as mounting the central part on the support shaft, the contact pieces a ', b'
The intermittent opening / closing switch according to claim 1, wherein c'and d'are pressed against the lower surfaces of the left and right arms by spring pressure and are attached in parallel with the engaging spring pieces.