JPS6029146Y2 - rotary switch - Google Patents

Description

[Detailed description of the invention] This invention relates to a rotary switch, and the purpose of this invention is to obtain a rotary switch with a small driving force that can perform both continuous operation and transfer operation by combining a single-pole single-throw reed switch and a magnet. That is.

In general, there are two types of reed switches: single-pole, single-throw type and single-pole, double-throw type that performs switching operations, but the latter has a wider range of advantages than the former in terms of switching capacity, contact withstand voltage, variation in characteristics, and stability of operation. Not only are they inferior, but they are also several times more expensive, and single-pole double-throw reed switches currently cannot perform both continuous operation and transfer operation.

In view of the above-mentioned problems with single-pole, double-throw type reed switches, this idea was designed to provide a rotary switch that can perform both continuous operation and transfer operation at low cost and that operates reliably using a single-pole, single-throw type reed switch. This is what I did.

As shown in Figure 1A, a single-pole, single-throw reed switch is turned off by the elasticity of the contact pieces A and B themselves when the contact pieces A and B are not energized.

In addition, as shown in the opening in Figure 1, when one contact piece A is excited with the S pole and the other contact piece B is excited with the N pole, a magnetic attraction force is generated between the contact pieces A and 8, and this magnetic attraction force Piece A.

If the elasticity of B itself overcomes this, contact pieces A and B attract each other and turn ON.

Furthermore, as shown in Figure 1, when contact pieces A and B are excited with the same polarity, a magnetic repulsion force is generated between contact pieces A and 8, opposite to the above, and contact pieces A and B are subjected to reciprocal detection. .

Therefore, since both the elasticity of the contact pieces A and B themselves and the magnetic repulsion force act as a force for separating the contact pieces A and B, it is possible to more reliably turn the reed switch from ON to OFF.

An embodiment of the rotary switch of this invention using a well-known single-pole single-throw reed switch that operates as described above will be described below with reference to the drawings.

That is, in FIGS. 2 and 3, 1 and 2 are single-pole, single-throw reed switches arranged in parallel.

Reference numeral 3 denotes a biasing magnet, and in order to excite both contact pieces IA and 2A of the reed switches 1 and 2 with the same pole, one pole of the biasing magnet 3 corresponds closely to the contact pieces IA and 2A. Moreover, it is rotatably supported on a support shaft 5 so that the corresponding magnetic pole can be selected to either N or S, and the desired corresponding state is maintained by a retaining spring 6.

4 is the other contact piece IB, 2 of the above-mentioned both reed switches 1, 2.
A J'j rotating magnet is provided in close proximity to B, and the reed switches 1 and 2 are arranged at relative positions offset by approximately 180 degrees in rotation angle with respect to the center of rotation of the rotating magnet 4.

Further, the rotating magnet 4 is connected to the reed switch 1, as shown in the fourth diagram.
2 and NS poles are provided on the surface corresponding to 2, and the N pole region is set at an angle θtJ.
, the S polar region is at an angle θ3, and the non-polar region is at an angle θ.

If θ8 is greater than 1800, for example θN
=180°10□, and θS is smaller than 180°, that is, θ
4. The NS polar region is set so that θ is larger than θ.

Next, in the rotary switch of the present invention, which is composed of the reed switches 1, 2, energizing magnets, and 3 rotating magnets 4 as described above, when the rotating magnet 4 is rotated in the direction of the arrow from the state shown in FIG. 2, the contact piece IB, The transition of the correspondence between 2B and the NS pole of the rotating magnet 4 will be explained.

That is, in Fig. 7, the horizontal axis represents the change in the correspondence between the contact pieces IB and 2B and the NS pole of the rotating magnet 4, and the rotation angle is plotted on the horizontal axis, and the upper solid line shows the change in the correspondence between the contact piece IB and the NS pole. The lower broken lines represent the transition of the correspondence between the contact piece 2B and the NS pole.

When the rotary magnet 4 is rotated in the direction of the arrow from the state shown in FIG. 2 in which the contact piece IB corresponds to one end of the north pole region of the rotating magnet 4, the contact piece IB becomes the north pole until the rotation angle exceeds θ. The correspondence continues, and when it exceeds θ and reaches θ8+θ0, it corresponds to one non-polar region, and θ, +θ.

From θ, +θ. Up to +θ3, θ corresponds to the S pole, 10.

θ, which is exactly one rotation beyond 10, is 10θ. The region up to 10θ80 corresponds to the other non-polar region.

With this, the rotating magnet 4 completes one rotation, and the above-described actions are sequentially repeated for subsequent rotations.

On the other hand, since the reed switch 2 is disposed at a position shifted by 180 degrees in rotational angle from the reed switch 1, the transition of correspondence between the contact piece IB of the reed switch 1 and the rotating magnet 4 is 180 degrees. 'The misalignment is repeated between the contact piece 2B of the reed switch 2 and the rotating magnet 4.

That is, the change in the broken line representing the change in correspondence between the contact piece 2B and the rotating magnet 4 is the same as the change in the solid line representing the change in correspondence between the contact piece IB and the rotating magnet 4, as shown in FIG. 7, but the phase is shifted by 180 degrees. becomes.

Therefore, the contact piece 2B continues to correspond to the north pole until the rotation angle is θ, and beyond θ□ until it reaches θ□100, it corresponds to one of the non-polar regions, θ1+θ.

From θ100.

Up to +03 corresponds to the S pole, θ□10θ. Ten theta. Beyond
The region up to θ1+θ0+θS+θ0 corresponds to the other non-polar region, and is θ1+θ.

Ten, ten. From θ100.

+θS+00+θN=360°+01 corresponds to the north pole.

As explained above, the contact pieces IB of reed switches 1 and 2,
2B are alternately excited by the NS poles of the rotating magnet 4 as shown in FIG. 7 as the rotating magnet 4 rotates, and the contact pieces I
B and 2B are out of phase by 180 degrees.

On the other hand, the contact pieces IA and 2A are always excited with the same polarity by the biasing magnet 3.

For example, in the case of FIG. 3 in which the S pole of the biasing magnet 3 corresponds to the contact pieces IA and 2A, both the contact pieces IA and 2A are always excited with the S pole, so the contact piece IB or 2B is the rotating magnet. 4
As mentioned in the explanation of the single-pole single-throw reed switch, a magnetic attraction force acts between the contact pieces IA and 1B or 2A and 2B, and the reed switches 1 and 2 are turned on, and the reed switches 1 and 2 are turned on. When the piece IB or 2B corresponds to the S pole of the rotating magnet 4, the contact piece IA.

A magnetic repulsion force acts between IB or 2A and 2B, and the reed switches 1 and 2 are turned off.

Next, the biasing magnet 3 is rotated half a turn against the elasticity of the holding spring 6, and as shown in FIG. Since both the contact pieces IA and 2A are always excited with the N pole, when the contact piece IB or 2B corresponds to the N pole of the rotating magnet 4, a magnetic repulsive force acts between the contact pieces IA and IB or 2A and 2B. When the reed switches 1 and 2 are turned OFF and the contact pieces IB or 2B correspond to the S pole of the rotating magnet 4, a magnetic attraction force acts between the contact pieces IA and IB or 2A and 2B, and the reed switches 1 and 2 becomes ON.

Next, according to the rotation of the rotating magnet 4, for each case where the S pole of the biasing magnet 3 corresponds to the contact pieces IA, 2A and the case where the N pole of the bias magnet 3 corresponds to the contact pieces IA, 2A. The operations of both reed switches 1 and 2 will be explained in detail in order.

Here, in FIG. 8, the S pole of the biasing magnet 3 is connected to the contact piece IA.

The reed switch 1 in the case shown in the third diagram corresponding to 2A,
The horizontal axis represents the rotation angle of the rotating magnet 4, and the solid line represents ON and OFF of the reed switch 1, and the broken line represents 0NOFF of the reed switch 2.

Further, FIG. 9 shows the 0NO of reed switch 1.2 in the case shown in FIG.
FF is expressed in the same way as above.

The third one whose S pole of the biasing magnet 3 corresponds to the contact pieces IA and 2A
The operation of both reed switches 1 and 2 when the rotating magnet 4 is rotated in the direction of the arrow from the state shown in FIG. 2 will be explained step by step based on FIGS. 2, 7, and 8. .

In the state shown in the second figure, the contact pieces IB and 2B correspond to the north pole of the rotating magnet 4, so both reed switches 1 and 2 are turned on.

When the rotation angle of the rotating magnet 4 exceeds θ1, the contact piece 2B leaves the N pole and corresponds to the non-polar region, so the contact pieces 2A, 2B
The reed switch 2 is turned off by its own elasticity.

When the rotation angle reaches θ, 100, the contact piece 2B corresponds to the S pole, and a magnetic repulsion force due to the cooperation of the rotating magnet 4 and the biasing magnet 3 acts between the contact pieces 2A and 2B, so in case Contact piece 2A, 2
Even if B has a slight welding failure and cannot be separated by the elasticity of the contact pieces 2A and 2B themselves in the previous stage, and the reed switch 2 continues to be ON until this stage, the elasticity and magnetic repulsion force Since both act as a separating force, the reed switch 2 is definitely turned off at this stage.

Also, if the magnetic force of the biasing magnet 3 is strong in the previous stage and the contact pieces 2A and 2B cannot be separated by their own elastic force as described above and remain ON until this stage, the magnetic force of the biasing magnet 3 The stronger the magnetic repulsion force acting on the contact pieces 2A and 26 becomes, the more reed switch 2 can be turned off at this stage.
do.

The rotation angle is θ□10.

When the temperature exceeds 103, the contact piece 2B leaves the S pole and corresponds to the non-polar region, so the magnetic repulsion that was acting between the contact pieces 2A and 2B disappears, but due to the elasticity of the contact pieces 2A and 2B themselves. , the reed switch 2 continues to be OFF.

The rotation angle is θ, 10.

Ten, ten. That is, when the contact piece 2B is rotated by exactly 180 degrees from the position shown in the second figure, the contact piece 2B again corresponds to the north pole, and the reed switch 2 is turned on.

Henceforth θ□10θ.

Ten θ, +θ. Contact piece 2B up to +θN (=360'10,)
Since the N-pole correspondence continues, the reed switch 2 continues to be ON up to 360°101.

When the rotation angle exceeds 08, the contact piece 1B leaves the N-pole correspondence that has been maintained until then and corresponds to a non-polar region, so the reed switch 1 is turned off due to the elasticity of the contact piece lAt1B itself.

When the rotation angle reaches θN100, the contact piece IB corresponds to the S pole, so the magnetic repulsion force due to the cooperation of the rotating magnet 4 and the biasing magnet 3 acts between the contact pieces IA and IB. If IA and IB were to cause a slight welding failure, they could not be separated by the elasticity of the contact pieces IA and IB themselves in the previous stage, and even if reed switch 1 remained ON, the elasticity would not be sufficient at this stage. Since both the magnetic repulsion force and the magnetic repulsion force act as a separation force, the reed switch 1 is reliably turned off at this stage.

Also, in the previous stage, the magnetic force of the biasing magnet 3 was strong, and the contact pieces IA and IB
Even if the reed switch 1 cannot be opened only by its own elastic force and remains ON until this stage, the reed switch 1 is reliably turned OFF because a magnetic repulsive force acts in addition to the elastic force at this stage.

When the rotation angle exceeds θN+00+θS, the contact piece IB leaves the S pole and corresponds to the non-polar region, so the contact pieces IA and IB
The magnetic counterforce that was acting between them disappears, but the contact piece IA,
The open state is maintained by the elasticity of the IB itself, and the reed switch 1 continues to be OFF.

The rotating magnet 4 rotates exactly one rotation from the rotation start position and returns to the second position.
When the illustrated rotation start position is reached, the contact piece IB again corresponds to the N pole, and the reed switch 1 is turned ON again.

After that, if the rotating magnet 4 continues to rotate, the reed switches 1 and 2
repeats the above operation.

To summarize the above, both reed switches 1 and 2 are ON from the rotation start position to θ□, and when θ□ is exceeded, θ□10.

Ten, ten. (=180°) only reed switch 1 is ONL, from 180° to θN (=180°+θ,)
In the meantime, both reed switches 1 and 2 are turned on again, and θN is exceeded and θN+0010, +θ.

(=360°), only the reed switch 2 is turned on.

That is, the reed switches 1 and 2 are regularly and alternately turned on every 180° rotation of the rotating magnet 4, and before one reed switch 1 or 2 is turned off, the other reed switch 2 or 1 is turned on, and both reed switches 1
, 2 are rotary switches that repeat a so-called continuous operation in which neither of them is turned off.

Next, in the state shown in FIG. 6 in which the N pole of the biasing magnet 3 corresponds to the contact pieces IA and 2A, the two reed switches 1 and 2 are rotated in the direction of the arrow from the state shown in FIG. 2. The operation will be explained step by step based on FIGS. 2, 7, and 9.

In the state shown in the second figure, the contact pieces IB and 2B both correspond to the north pole of the rotating magnet 4, so the reed switches 1 and 2 are both OFF.

When the rotation angle exceeds 01, the contact piece 2B leaves the N pole and corresponds to the non-polar region, so the magnetic repulsive force acting between the contact pieces 2A and 2B disappears, but the contact pieces 2A and 2B The reed switch 2 continues to be OFF due to its own elasticity.

θ1+θ. Since the contact piece 2B corresponds to the S pole,
Reed switch 2 is turned on.

When the rotation angle exceeds 01+θ0+θ, the contact piece 2B leaves the S pole and corresponds to the non-polar region, so the contact pieces 2A, 2B
The reed switch 2 is turned off by its own elasticity.

The rotation angle is 0100. 10,800.

(=180'), the contact piece 2B again corresponds to the N pole, and a magnetic repulsion force due to the cooperation of the rotating magnet 4 and the biasing magnet 3 acts between the contact pieces 2A and 2B. 2A, 2B
Even if a slight welding failure occurs and the reed switch 2 continues to be ON until this stage because the contact pieces 2A and 2B cannot be separated by the elasticity alone in the previous stage, the elasticity and magnetic repulsion force Since both act as a separating force, the reed switch 2 is reliably turned off at this stage.

Also, in the previous stage, the magnetic force of the biasing magnet 3 was strong and the contact piece 2A
, 2B cannot be separated only by its own elastic force and remains ON until this stage.
continues, the stronger the magnetic force of the biasing magnet 3, the more the contact piece 2A
, 2B becomes large, so the reed switch 2 is turned off more reliably at this stage.

Henceforth θ, +00 ten 03 + 00 ten θN (=360'+0
The correspondence between contact piece 2B and N pole continues until 1), and then θ1+θ
0+θS ten θ0+θN+θO (=360° ten, ten.

), the closed switch 2 continues to be OFF until 3606+θN+00.

When the rotation angle exceeds ON, the contact piece 1B leaves its correspondence with the north pole, which has continued until then, and corresponds to the non-polar region, so the magnetic counterforce acting between the contact pieces IA and IB disappears.
Due to the elasticity of contact pieces IA and IB themselves, reed switch 1
continues to be OFF.

When the rotation angle reaches θN+00, that is, the contact piece 2B starts to correspond to the south pole at θ1+θ.

When the reed switch 1 is further rotated by 180 degrees, the contact piece 1B corresponds to the south pole, so the reed switch 1 is turned on.

The rotation angle is 0800.

When the value exceeds 10 θ, the contact piece IB leaves the S pole and corresponds to a non-polar region, so the reed switch 1 is turned off due to the elasticity of the contact pieces IA and IB themselves.

The rotating magnet 4 rotates exactly one rotation from the rotation start position and returns to the second position.
When the illustrated rotation start position is reached, the contact piece IB again corresponds to the north pole, and a magnetic counterforce is applied between the contact pieces IA and IB due to the cooperation of the rotating magnet 4 and the biasing magnet 3. , I
Even if B had a welding failure and could not be separated by the elasticity of the contact pieces IA and IB themselves in the previous stage, and the reed switch 1 remained ON until this stage, the elasticity and magnetic counterforce were Since both act as a separating force, the reed switch 1 is surely turned off at this stage.

Also, in the previous stage, the magnetic force of the biasing magnet 3 was strong and the contact piece IA
, the IB cannot be opened only by its own elastic force, and remains ON until this stage.
continues, the stronger the magnetic force of the biasing magnet 3, the more the contact piece I
Since the magnetic repulsion force acting on A and IB increases, the reed switch 1 is turned off more reliably at this stage.

After that, if the rotating magnet 4 continues to rotate, the reed switch 1,
2 repeats the above operation.

To summarize the above, θ□10 from the rotation start position.

Until then, both reed switches 1 and 2 are OFF and θ□
Beyond 1000 θ, up to +θ0+θ8, only reed switch 2 is ON, and θ□10.

Over +03 θ, 10.

(=180° 10, 10.) Both reed switches 1 and 2 are turned off again, and θN is 10.

(=180° 10, 10.) to 080. Until +03, only reed switch 1 is ON.

That is, the reed switches 1 and 2 are repeatedly turned ON regularly and alternately every 180° rotation of the rotating magnet 4, and before one reed switch 1 or 2 is turned on, the other reed switch 2 or 1 is turned OFF. The reed switches 1 and 2 are rotary switches that repeat a so-called transfer operation in which both are never turned on.

As explained above, the rotary switch of this invention has three biasing magnets.
By selecting the corresponding state for the contact pieces IA and 2A, you can easily select either transfer operation or continuous operation, and also transfer a part of the magnetic force required to operate the reed switches 1 and 2 to the energizing magnet 3. Because we are sharing the
Since the rotating magnet 4 may be small and lightweight, the driving force for driving the rotating magnet 4 may be small, and the OFF operation of the reed switch is performed by the elasticity of the contact piece itself and the cooperation of the rotating magnet 4 and the biasing magnet 3. Since the switch is operated using both the strong magnetic counterforce and the strong magnetic repulsion force, not only can reliable OFF operation be expected, but it also has excellent effects such as a large opening/closing capacity.

Note that this invention is not limited to the one in which the reed switches 1 and 2 are turned on alternately every 172 rotations of the rotating magnet 4 as described above, but as shown in FIGS. 10 to 13, the reed switches 1 and 2 are Approximately φ is the rotation angle with respect to the center of rotation of
At the same time, the rotary magnet 4 is placed at a 360° angle
' /2φ N and S poles are provided, and the centers of adjacent NS poles are located at correlated positions shifted by approximately φ degrees, and the magnetic pole area of one of the NS poles is set to be larger than φ degrees, for example, φ10 ,
By setting the other magnetic pole area to be smaller than φ, that is, one magnetic pole area is larger than the other magnetic pole area, the reed switches 1.2 are alternately turned to O every time the rotating magnet 4 rotates by φ degrees.
It may be configured so that the number of times is N.

[Brief explanation of drawings]

Figure 1 A9 and C are explanatory diagrams of the operation of a single-pole single-throw reed switch, Figure 2 is a top view of a rotary switch showing an embodiment of this invention, Figure 3 is its front view, and Figure 5. is its side view,
Fig. 6 is a front view showing different states, Fig. 4 is a top view of the rotating magnet, Figs. 7, 8, and 9 are operation explanatory diagrams, and Fig. 10 is another embodiment of this invention The top view, FIGS. 11, 12, and 13 are explanatory views of the operation. In the diagram, 1 and 2 are single-pole, single-throw reed switches, IA and IB.
2A and 2B are contact pieces of the reed switch 1, 3 is a biasing magnet, 4 is a rotating magnet, 5 is a support shaft that rotatably supports the bias magnet 3, and 6 is a support shaft for rotatably supporting the bias magnet 3. This is a holding spring that maintains the biasing magnet 3 in a desired state. Note that the same reference numerals in the drawings indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] Two reed switches 1 and 2 arranged in parallel, a biasing magnet 3 that excites one contact piece IA and 2A of both reed switches 1 and 2 to the same polarity, and a biasing magnet 3 provided corresponding to the biasing magnet 3. Both reed switches 1,
The reed switch 1 is provided with a rotating magnet 4 that alternately excites the other contact pieces IB and 2B of 2 with the NS pole, and the reed switches 1 and 2 are arranged at relative positions shifted by φ degrees in rotation angle with respect to the center of rotation of the rotating magnet 4. At the same time, the rotating magnet 4 is provided with 360/2φ N and S poles so that the centers of the adjacent NS poles are approximately φ degrees, and the magnetic pole with the larger magnetic pole area among the NS poles of the rotating magnet 4 is When the magnetic pole area of the rotating magnet 4 is at least φ degrees or more and the magnetic pole area of the rotating magnet 4 faces the other contact piece IB, 2B of both reed switches 1, 2, the magnetic pole of the biasing magnet 3 and the magnetic pole of the rotating magnet 4 are the same. When in pole position, both reed switches 1 and 2
The magnetic pole area of one of the NS poles of the rotating magnet is set larger than the other, and the magnetic pole area of one of the NS poles of the rotating magnet is set larger than the other, and the reed switches 1 and 2 have a larger magnetic pole area than the other, and the reed switches 1 and 2 have a larger magnetic pole area than the other of the NS poles of the rotating magnet, and the reed switches 1 and 2 have a larger magnetic pole area than the other. The biasing magnet 3 is connected to the reed switch 1, so that the magnetic pole of the biasing magnet 3 can be selected as either NS or NS.
A rotary switch provided for 2.