JPS6231461B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotary switch that opens and closes a switch using the principle of attraction and repulsion of two magnets.

This type of rotary switch has been known for some time. However, in the conventionally known rotary switch of this type, the switch switching operation member is constituted by a rotary knob, as also seen in Japanese Utility Model Application No. 49-24971.

However, depending on the use of the rotary switch, it may be easier to operate the switch switching member in the form of a push-button knob.

Accordingly, the present invention provides a rotary switch configured so that switching operations can be performed using a push button type knob, that is, a push button type operating member.

The rotary switch according to the present invention basically opens and closes the switch by making one magnet approach and leave the other magnet using both attraction and repulsion of the two magnets. More specifically, a fixed contact member is fixed at a fixed position in a switch case, and a first magnet operated by a switch switching operation member and the fixed contact member are arranged in the switch case. A working movable contact member is fixed and houses a second magnet which faces the first magnet and is movable toward and away from the first magnet along a direction orthogonal to the moving surface of the first magnet. The first magnet is rotatably operated by the switch switching operation member, while the second magnet is prevented from rotating around its axis of movement, and the first magnet and the second magnet On each opposing surface of the magnet, N poles and S poles are alternately magnetized in sectors of the same angle.

Furthermore, the switch switching operation member includes a push-button operation member that is biased in one direction by a return spring and has a rod that extends in the push-in direction, and when the push-button operation member is pushed in, the rod moves the switch to the sector. It is comprised of a ratchet that is rotated per angle, and the ratchet is configured to rotate integrally with the first magnet.

The present invention will be specifically described below with reference to the illustrated embodiments.

The embodiments shown in FIGS. 1 to 3 relate to a rotary switch in which the switch switching operation member is composed of a push button type operation member and a ratchet interlocked with the operation member.

21 is a switch case, lower case 2
1a and an upper case 21b are combined.

A push-button operating member 23 is housed in the upper case 21b so as to be vertically movable. This operating member 23 is comprised of a knob 23a that projects outward from a hole 21c formed in an upper wall 21h of the upper case 21b, and a push rod 23b having spring properties that extends downward from the upper wall of the knob 23a. It is constantly biased upward. still,
A spring seat 29 receives the lower end of the spring 28, and is held between the upper case 1b and the lower case 1a. The push rod 23b extends downward through an opening 29a formed in the center of the spring seat 29.

On the other hand, a fixed shaft 21 is mounted on the side wall surface of the lower case 21a.
i is provided, and by the side wall 21f of the fixed shaft 21i,
A second magnet 25 with a movable contact member 26 is fitted so as to be movable in the axial direction and non-rotatable, and a ratchet 27 and the first magnet 24 fixed thereto are fitted near the center of the fixed shaft 21i.

As shown in FIG. 4, the first magnet 24 and the second magnet 25 are both made of disc-shaped ferrite magnets with S and N poles alternately magnetized in sectors of the same angle. In this embodiment, eight portions 24a(S)-
24b(N)...24k(S)-24l(N) or 25a(S)-25b(N)...25k(S)-
It is composed of 25 l (N).

The ratchet 27 is equipped with a one-way clutch (not shown) and is rotatable in the direction of arrow X'.

The ratchet 27 is configured such that when the operating member 23 is pushed in, the teeth 27a, 27b of the ratchet 27 are pushed downward by the tip of the push rod 23b, and rotated by one sector per push. . FIG. 3 shows this operating state. As shown in the figure, the push rod 23b has a spring property so that it can be easily deflected when, for example, the tooth 27b is pushed in, and thus comes into contact with the tooth 27a in the position previously occupied by the tooth 27b. can be avoided.

As described above, by sequentially changing the rotational position of the first magnet 24 with respect to the second magnet 25, the second magnet can be attracted or repelled. When the second magnet 25 is attracted to the first magnet 24 together with the movable contact member 26, the first magnet 25 fixed to the side wall 21f of the lower case 21a
When the second magnet 25 is separated from the pair of fixed contact members 22a, 22b and turned off, and the second magnet 25 is repelled together with the movable contact member 26 against the first magnet 24, the fixed contact members 22a, 22
It is brought into pressure contact with b and becomes a switch.

As is clear from the detailed description of the examples above,
The rotary switch according to the present invention operates the first magnet to make the magnetic pole on the opposing surface of the first magnet different from or the same as the magnetic pole on the opposing surface of the second magnet, thereby controlling the second magnet. The movable contact member fixed to the second magnet is brought into contact with and separated from the fixed contact member fixed to the switch case by attracting or repelling the first magnet, so that the movable contact member itself has spring properties and reversibility. There is no need to hold the movable contact member, and there is no need for a return spring or the like for biasing the movable contact member, so there is an advantage that the structure is extremely simple.

Moreover, since this rotary switch moves the first magnet on a plane perpendicular to the moving direction of the second magnet, it is of course possible to operate the first magnet from the second magnet repulsion state to the attraction state. Even in the reverse operation, the second magnet can be separated from the first magnet with a small force, making the operation very smooth.Additionally, there is an attraction/repulsion click at the switching point, which gives a sense of moderation. have

Furthermore, this rotary switch is very easy to operate, as it can be switched simply by pushing the push button type operating member.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a longitudinal sectional view of the rotary switch, FIG. 2 is a sectional view taken along the line of FIG. 1, and FIG. 3 is a state in which the push rod in FIGS. FIG. 4 is an exploded perspective view showing the first magnet, the second magnet, and the movable contact member. 21...Switch case, 22a, 22b...
Fixed contact member, 23... switch switching operation member,
24...first magnet, 25...second magnet, 26...movable contact member.

Claims (1)

[Scope of Claims] 1. A fixed contact member is fixed at a fixed position in a switch case, and a movable member is provided in the switch case that cooperates with a first magnet operated by a switch switching operation member. A contact member is fixed and relative to the first magnet and
A second magnet is housed opposite the magnet so as to be movable toward and away from the magnet in a direction perpendicular to the moving surface of the magnet, and the first magnet is rotatably operated by the switch switching operation member. On the other hand, the second magnet is prevented from rotating around its axis of movement, and furthermore, N poles and S poles are arranged alternately in sectors of the same angle on each opposing surface of the first magnet and the second magnet. The switch switching operation member has a push-button operation member that is biased in one direction by a return spring and has a rod that extends in the pushing direction, and when the push-button operation member is pushed in, the switch switching operation member A rotary switch comprising a ratchet that is rotated by the sector angle, and further comprising a ratchet that rotates integrally with the first magnet.