JP4139182B2 - Rotary switch device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rotary switch device having an improved structure for moving a movable contact to and from a fixed contact.
[0002]
[Prior art]
Conventionally, for example, a rotary switch device used for various controls of a vehicle is shown in FIG. In this device, a gear 2 is provided on a knob 1 that is rotated, and a gear 3 is engaged with the gear 2. A holder support 4 is attached to the gear 3, and a contact holder 5 is attached to the holder support 4 (see, for example, Patent Document 1). A movable contact 6 is attached to the contact holder 5, and fixed contacts 7 to 9 corresponding to the movable contact 6 are provided on the substrate 10. FIG. 9 shows in detail the arrangement of the fixed contacts 7 to 9 on the substrate 10.
[0003]
In this configuration, when the knob 1 is rotated, the gear 2 rotates integrally with the knob 1 and the gear 3 meshed with the knob 1 rotates as indicated by arrows in FIG. Then, the holder support 4 rotates integrally with the gear 3, and the contact holder 5 rotates integrally with the holder support 4. As a result, the movable contact 6 slides on a portion of the substrate 10 where the fixed contacts 7 to 9 are located, and contacts and separates from the fixed contacts 7 to 9.
[0004]
In FIG. 9, the contact point of the movable contact 6 with respect to the fixed contacts 7 to 9 is indicated by black dots, and the movable contact 6 is a fixed contact 7, a fixed contact 8, To connect between them. Subsequently, in the operation stage B, the fixed contact 7, the fixed contact 8 and the fixed contact 9 are brought into contact with each other and connected therebetween. Subsequently, in the operation stage C, the fixed contact 7 and the fixed contact 9 are contacted and connected therebetween. Subsequently, in the operation stage D, only the fixed contact 7 is contacted and the other fixed contacts 8 and 9 are not contacted.
[0005]
Thereafter, the operation steps E to H of the knob 1 are the same as the operation steps A to D, respectively, and the same operation is repeated endlessly in the operation steps A to H after one rotation. FIG. 10 shows this in a table.
[0006]
[Patent Document 1]
JP-A-10-269898 (pages 3 and 4, FIGS. 1 and 2)
[0007]
[Problems to be solved by the invention]
In the case of the above-mentioned conventional one, the fixed contacts 7 to 9 need to be provided in a concentric arrangement on the substrate 10 in accordance with the movement of the movable contact 6 accompanying the rotation of the contact holder 5, and those having a bulge in an arc shape. In order to realize the above on the substrate 10 having a limited space (particularly, width dimension), the fixed contacts 7 to 9 must be provided compactly.
[0008]
For this reason, the operating stroke of the movable contact 6 with respect to them must be reduced, and in this configuration, the engagement accuracy of the gears 2 and 3 and the displacement of the movable contact 6 greatly affect the switch accuracy. There was a drawback in that it was necessary to make a considerable amount of actual product, otherwise, only a product with low reliability could be obtained.
[0009]
The present invention has been made in view of the above-described circumstances. Accordingly, the object of the present invention is to provide a rotary switch device that can obtain high reliability with respect to switch accuracy without significant preparation by the actual product. is there.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, a rotary switch device according to the present invention has a knob that is rotated and a corrugated portion in the rotation direction of the knob by facing the corrugated portion of two guide pieces having a corrugated portion to the knob. Each guide portion is formed in a groove shape, and each has a protrusion, and the protrusion is inserted into the guide portion and is driven by the guide portion as the knob rotates, so that the guide portion reciprocates linearly individually. A plurality of contact holders provided in the manner described above, a movable contact provided on each of the contact holders, and a plurality of fixed contacts to which the movable contacts come into contact with or separated from each other, and different connection modes of the movable contacts with respect to the fixed contacts The contact holders are sequentially realized by individual linear reciprocating motions of the plurality of contact holders accompanying the rotation of the knob.
[0011]
According to this, since the movable contacts are all linearly reciprocated even when the knob is operated in rotation, the fixed contacts are also linear with no bulges correspondingly. It can be provided sufficiently large where space is limited. Therefore, the operating stroke of the movable contact can be increased, and the assembly accuracy of other parts and the displacement of the movable contact do not significantly affect the switch accuracy. Sex can be obtained.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment in which the present invention is applied to a rotary switch device for a vehicle will be described with reference to FIGS.
First, in FIG. 2, reference numeral 11 denotes an operation lever 11 provided near the steering wheel of the vehicle, for example, and various components shown in FIG. 1 are incorporated therein.
[0013]
Of these, reference numeral 12 denotes a knob, which has a short cylindrical shape with a lid, and one guide piece 13 is assembled therein. This one guide piece 13 has a short cylindrical shape with a diameter smaller than that of the knob 12, and has an inner cylinder 14 inside thereof, on the side opposite to the inner side of the knob 12 of the inner cylinder 14. A corrugated portion 15 is formed on the right side in the figure. In the waveform section 15, each waveform has a trapezoidal shape. The one guide piece 13 may be formed integrally with the knob 12.
[0014]
On the other hand, reference numeral 16 denotes the other guide piece paired with the one guide piece 13, and the other guide piece 16 has a ring shape and has a corrugated portion on one guide piece 13 side. 17. Each waveform portion 17 also has a trapezoidal shape. The other guide piece 16 is assembled to one guide piece 13. As a result, the corrugated portion 17 is opposed to the corrugated portion 15, and a guide portion 18 composed of a corrugated groove is formed with a gap therebetween. Yes.
[0015]
On the other hand, reference numerals 19 and 20 denote contact holders, both of which have protrusions 21 and 22 as follower portions, which are accommodated in the other guide piece 16 and the one guide piece 13 to guide them. Inserted into part 18 . Further, movable contacts 23 and 24 are attached to the side of the contact holders 19 and 20 opposite to the side having the protrusions 21 and 22, and the movable contacts 23 and 24 are attached to the tip portions of FIGS. 6 have contacts 23a, 23b, 24a, and 24b. Although not shown, the lateral movement of the contact holders 19 and 20 is controlled by the workpiece in the operation lever 11.
[0016]
Reference numeral 25 denotes a substrate, and fixed contacts 26, 27, and 28 are provided on the lower surface thereof. These fixed contacts 26 to 28, which corresponds with the variable dynamic contact 23 and 24, the fixed contact 26 of which with respect to form a crank shape, the stationary contacts 27 and 28 are both a mere rectangular formed is doing.
[0017]
As described above, these components are incorporated in the operation lever 11, and the knob 11 is partially exposed to the outside from the window 29 of the operation lever 11 as shown in FIG. 2. In this way, rotation operation is possible.
[0018]
Next, the operation of the above configuration will be described.
When the knob 12 is rotated, as shown by arrows in FIG. 1, one guide piece 13 and the other guide piece 14 rotate together with the knob 12, and the guide portion 18 also rotates. Since the contact holders 19 and 20 have the protrusions 21 and 22 inserted into the rotating guide portion 18, and their lateral movement is restricted by the workpiece in the operation lever 11, Eventually, the contact holders 19 and 20 are reciprocated linearly individually by being driven only by the corrugation of the guide portion 18 by the protrusions 21 and 22. Accordingly, the movable contacts 23 and 24 integrally and reciprocally move linearly and slide on the portion where the fixed contacts 26 to 28 under the substrate 25 are located so as to contact and separate from the fixed contacts 26 to 28. To do.
[0019]
3 to 6 show the displacement of the movable contacts 23 and 24 at this time (displacement of the contact holders 19 and 20) in the order of operation of the knob 12. In the initial operation stage A of the knob 12 shown in FIG. The contacts 23 and 24 connect the fixed contacts 26 and 27 by the movable contact 23 bringing the contact 23 a into contact with the fixed contact 26 and bringing the contact 23 b into contact with the fixed contact 27. At this time, the movable contact 24 brings the contact 24 a into contact with the fixed contact 26, but does not bring the contact 24 b into contact with the fixed contact 28 and does not connect the fixed contacts 26, 28.
[0020]
Subsequently, in the operation stage B shown in FIG. 4, the movable contact 23 connects the fixed contacts 26 and 27 by bringing the contact 23 a into contact with the fixed contact 26 and bringing the contact 23 b into contact with the fixed contact 27. At this time, the movable contact 24 brings the contact 24a into contact with the fixed contact 26 and contacts the fixed contact 28 with the contact 24b to connect the fixed contacts 26 and 28 together.
[0021]
Subsequently, in the operation stage C shown in FIG. 5, the movable contact 23 brings the contact 23 a into contact with the fixed contact 26, but does not bring the contact 23 b into contact with the fixed contact 27 and does not connect the fixed contacts 26, 27. However, at this time, the movable contact 24 brings the contact 24 a into contact with the fixed contact 26, and contacts the fixed contact 26 with the contact 24 b in contact with the fixed contact 28.
[0022]
Subsequently, in the operation stage D shown in FIG. 6, the movable contact 23 brings the contact 23 a into contact with the fixed contact 26, but does not bring the contact 23 b into contact with the fixed contact 27 and does not connect the fixed contacts 26, 27. At this time, the movable contact 24 brings the contact 24 a into contact with the fixed contact 26, but does not bring the contact 24 b into contact with the fixed contact 28, and does not connect the fixed contacts 26, 28.
Then, after one rotation, the same operation as described above is repeated endlessly in the operation stages A to D. FIG. 7 shows this in a table.
[0023]
As described above, in this configuration, different connection modes of the movable contacts 23 and 24 with respect to the fixed contacts 26 to 28 are sequentially realized by individual linear reciprocation of the plurality of contact holders 19 and 20 as the knob 12 rotates. Like to do.
[0024]
According to this, both the movable contacts 23 and 24 are linearly reciprocated even when the operation of the knob 12 is rotated. Correspondingly, the fixed contacts 26 to 28 are also respectively connected. It is straight and has no bulge, and can be provided sufficiently large where space (particularly the width dimension) is limited (the lower surface of the substrate 25). Therefore, the operation stroke of the movable contacts 23 and 24 can be increased, and the assembly accuracy of other parts and the displacement of the movable contact do not greatly affect the switch accuracy. There is no need to do so, and high reliability can be obtained.
[0025]
The present invention is not limited to the embodiments described above and shown in the drawings. In particular, the number of movable contacts and fixed contacts may be more than the above, and the present invention may be applied to other than the vehicle as a whole. However, the present invention is not limited to those incorporated in the operation lever, and can be implemented with appropriate modifications within a range not departing from the gist.
[0026]
【The invention's effect】
As described above, according to the rotary switch device of the present invention, it is possible to obtain a remarkable effect that a high reliability can be obtained with respect to the switch accuracy without much preparation by the actual product.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a main part showing an embodiment of the present invention. FIG. 2 is an external perspective view of an operation lever incorporating the apparatus. FIG.
FIG. 4 is a bottom view showing the operation of the main part 2
FIG. 5 is a bottom view showing the operation of the main part 3
FIG. 6 is a bottom view showing the operation of the main part.
FIG. 7 is a diagram showing actions of main parts in a table. FIG. 8 is a view corresponding to FIG. 1 showing a conventional example. FIG. 9 is a bottom view showing actions of main parts (corresponding to FIGS. 3 to 6).
[Fig. 10] Fig. 7 equivalent diagram [Explanation of symbols]
Reference numeral 12 denotes a knob, 18 denotes a guide portion, 19 and 20 denote contact holders, 23 and 24 denote movable contacts, and 26 to 28 denote fixed contacts.

Claims (1)

A knob that is rotated,
A guide portion formed into a corrugated groove shape in the rotation direction of the knob by opposing the corrugated portion of the two guide pieces having the corrugated portion to the knob ,
A plurality of contact holders, each of which has a protrusion, and the protrusions are inserted into the guide portion and follow the guide portion as the knob rotates, so that the contact holders are individually reciprocated linearly;
Movable contacts respectively provided in the contact holder;
A plurality of fixed contacts to which the movable contact comes in contact with and away from, and
A rotary switch device characterized in that different connection modes of the movable contact with respect to the fixed contact are sequentially realized by individual linear reciprocation of the plurality of contact holders accompanying rotation of the knob.

Images