WO2017212695A1

WO2017212695A1 - Rotation detector

Info

Publication number: WO2017212695A1
Application number: PCT/JP2017/007324
Authority: WO
Inventors: 雅樹 ▲高▼橋
Original assignee: アルプス電気株式会社
Priority date: 2016-06-09
Filing date: 2017-02-27
Publication date: 2017-12-14

Abstract

[Problem] To provide a rotation detector that is able to hold an antenna inside a rotation operation knob and enables downsizing of the detector. [Solution] The present invention is provided with: an insulation substrate 50; a holder 10 fixed on the insulation substrate 50; a rotor 40 that is rotatably held by the holder 10; a rotation operation knob 45 fixed to the rotor 40; and a loop antenna 30 comprising a conducting wire 31 wound around the holder 10. The rotor 40 is disposed on the outer side of the holder 10; the holder 10 has a protrusion 10b that protrudes upward higher than the upper end 40a of the rotor 40; the loop antenna 30 is disposed on the outside surface of the protrusion 10b; and the rotation operation knob 45 covers the protrusion 10b and the loop antenna 30.

Description

Rotation detector

The present invention relates to a rotation detector, and more particularly to a rotation detector with a built-in antenna.

Conventionally, a device having an antenna and incorporating a rotary encoder (rotation detector) has been developed. For example, in a conventional cellular phone, a whip antenna for transmission and reception is provided so as to protrude from the casing, and a rotary encoder that displays a telephone number and the like by turning a rotary operation knob has been incorporated. Further, in a small information terminal such as a mobile phone, a structure for holding a whip antenna has been considered in consideration of downsizing.

A method for holding an antenna in such a small information terminal is disclosed in Patent Document 1. Hereinafter, a method for holding an antenna in the small information terminal 900 will be described with reference to FIG.

The small information terminal 900 includes a rotary encoder for character input and function selection, and is attached to the rotary encoder, and a cylindrical knob 907 having a hollow inside is disposed outside the casing of the small information terminal 900. Set up. The antenna 910 is held by accommodating the antenna 910 in the cavity inside the knob 907.

Such a configuration makes it possible to reduce the size of a small information terminal having an antenna and a built-in rotary encoder.

JP 2002-247168 A

In the conventional antenna holding method in the small-sized information terminal 900, since the transmission / reception frequency for the mobile phone is high, the total length of the antenna is relatively short, and a rotary encoder (rotation) can be performed without newly providing a member for holding the antenna. The antenna could be held in the knob of the detector. However, in such a conventional antenna holding method, when the transmission / reception frequency is low, the total length of the antenna becomes long, so it is difficult to provide a mechanism for holding the antenna in the rotation operation knob of the rotation detector. Therefore, when the total length of the antenna is long, it has been difficult to reduce the size of the small information terminal or the rotation detector.

The present invention has been made in view of such a state of the art, and provides a rotation detector that can hold an antenna in a rotation operation knob and can be miniaturized.

In order to solve the above problems, a rotation detector according to the present invention includes an insulating substrate, a holder fixed to the insulating substrate, a rotor rotatably held by the holder, and a rotation operation knob fixed to the rotor. And a loop antenna made of a conductive wire wound around the holder, and the rotor is provided outside the holder, and the holder has a protruding portion that protrudes above the upper end of the rotor. The loop antenna is provided on an outer surface of the protruding portion, and the rotation operation knob covers the protruding portion and the loop antenna.

Since the rotation detector configured in this way can form a loop antenna by winding a conducting wire around a holder, it is easy to incorporate a long-length antenna. As a result, the rotation detector can be miniaturized. In addition, since the loop antenna does not come into contact with the rotating portion such as the rotor and the rotation operation knob and is covered with the rotation operation knob, it is possible to prevent a person from touching the loop antenna. Therefore, it is difficult to break down. Furthermore, since the loop antenna is formed on the protruding portion of the holder near the rotary operation knob, when the loop antenna is used for short-range wireless communication, communication can be performed at a closer distance, and stable wireless communication is possible. .

Further, in the above configuration, the holder includes an outer tube portion and an inner tube portion that is located inside the outer tube portion and is integrated with the outer tube portion, and the rotor is the outer tube portion. It has the characteristics that it is hold | maintained so that it may contact, and the said protrusion part is provided in the said inner cylinder part.

In the rotation detector configured as described above, since the holder includes the outer cylinder portion and the inner cylinder portion, when the rotation detector does not require the loop antenna, the loop antenna is not provided by providing the inner cylinder portion. The components of the built-in rotation detector and the rotation detector not including the loop antenna can be shared.

Further, in the above configuration, the terminal has a plurality of terminals integrally formed with the holder, the terminal protrudes from a lower surface of the holder, a groove is formed in the holder, and a tip end portion of the conducting wire is It is electrically connected to the terminal and has a feature that a part of the conducting wire is accommodated in the groove.

Since the rotation detector configured as described above is provided with a groove in the holder, the lead wire for connecting the loop antenna and the terminal can be securely held.

Since the rotation detector according to the embodiment of the present invention can form a loop antenna by winding a conducting wire around a holder, it is easy to incorporate a long-length antenna. As a result, the rotation detector can be miniaturized. In addition, since the loop antenna does not come into contact with the rotating portion such as the rotor and the rotation operation knob and is covered with the rotation operation knob, it is possible to prevent a person from touching the loop antenna. Therefore, it is difficult to break down. Furthermore, since the loop antenna is formed on the protruding portion of the holder near the rotary operation knob, when the loop antenna is used for short-range wireless communication, communication can be performed at a closer distance, and stable wireless communication is possible. .

It is a perspective view which shows the external appearance of the rotation detector in embodiment. It is a perspective view which shows the internal structure of a rotation detector. It is a perspective view which shows the internal structure of the rotation detector in the modification of embodiment. It is a top view of a rotation detector. It is a side view of a rotation detector. It is a cross-sectional perspective view of a rotation detector. It is a cross-sectional perspective view of a rotation detector. It is a schematic diagram of the small information terminal concerning a prior art example.

Hereinafter, the rotation detector of the present invention will be described with reference to the drawings. The rotation detector of the present invention is generally referred to as a rotary encoder, and is mounted on an in-vehicle device, for example, so that various circuits in the in-vehicle device can be selected. The in-vehicle device is equipped with a short-range wireless communication circuit for performing wireless communication with other electronic devices such as a small information terminal, and an antenna for short-range wireless communication is provided in the rotation detector. Is built-in. In addition, about the use of the rotation detector of this invention, it is not limited to embodiment described below, It can change suitably. In the description of each drawing, when it is described as the right side, the left side, the upper side, and the lower side, these indicate the + X side, the −X side, the + Z side, and the Z side, respectively.

[Embodiment]
Initially, with reference to FIG.1 and FIG.2, the rotation detector 100 which concerns on embodiment of this invention is demonstrated. FIG. 1 is a perspective view illustrating an appearance of the rotation detector 100 according to the embodiment, and FIG. 2 is a perspective view illustrating an internal structure of the rotation detector 100. In FIG. 2, the rotation operation knob 45 is indicated by a two-dot chain line on the assumption that it is transparent.

As shown in FIG. 2, the rotation detector 100 includes an insulating substrate 50, a holder 10, a rotor 40, a loop antenna 30, and a rotation operation knob 45.

As shown in FIG. 1, the rotation operation knob 45 is formed in a substantially cylindrical shape, and has an upper surface portion 45 a having a circular shape in the uppermost plan view and a side surface portion extending downward from the outer edge of the upper surface portion 45 a. 45b, and a hollow portion 45c opened downward is formed inside.

As shown in FIG. 2, the holder 10 has a cylindrical main body portion 10a, a protruding portion 10b extending above the main body portion 10a, and a diameter of the main body portion 10a. And a pedestal portion 10c having a larger diameter.

As shown in FIG. 1, an attachment metal plate 17 having a plurality of attachment legs 17a is attached to the base portion 10c. The insulating substrate 50 is provided with a plurality of mounting holes 50a. The plurality of mounting legs 17a are respectively inserted into the mounting holes 50a, and the mounting legs 17a are soldered to the back surface of the insulating substrate 50. The holder 10 is fixed to the insulating substrate 50. A plurality of encoder terminals 19 integrally formed with the holder 10 are attached to the pedestal portion 10c, and input / output signals as encoders are input or output.

As shown in FIG. 2, the rotor 40 is formed in a cylindrical shape, and the above-described rotation operation knob 45 is fixed to the rotor 40. The rotor 40 is provided outside the main body 10 a in the holder 10 and is rotatably held by the holder 10. Note that the protrusion 10 b of the holder 10 described above protrudes above the upper end 40 a of the rotor 40.

A plurality of contacts (not shown) are provided between the rotor 40 and the holder 10, and various circuits in the in-vehicle device (see FIG. (Not shown) can be selected. The plurality of contacts are connected to the plurality of encoder terminals 19 described above. The plurality of contacts are configured so that a click feeling is obtained when the rotor 40 is rotated.

The loop antenna 30 includes a conductive wire 31 and is provided outside the holder 10. The conducting wire 31 is closely wound a plurality of times from the lower end to the upper end of the outer surface of the protruding portion 10b of the holder 10.

The short-range wireless communication circuit 51 is formed on the insulating substrate 50, and the loop antenna 30 described above is connected to the short-range wireless communication circuit 51. The short-range wireless communication is performed by the loop antenna 30 provided on the protruding portion 10b of the holder 10 and another short-range wireless communication circuit built in a smart phone or the like that is held close to the upper portion of the rotary operation knob 45. This is done with the antenna.

As described above, the rotary operation knob 45 is fixed to the rotor 40. Further, the holder 10 and the rotor 40 having the protruding portion 10 b provided with the loop antenna 30 are accommodated in the hollow portion 45 c of the rotation operation knob 45. Therefore, the rotation operation knob 45 covers the protruding portion 10 b of the holder 10, the loop antenna 30, and the rotor 40.

[First Modification of Embodiment]
Next, with reference to FIGS. 3 to 7, a rotation detector 110 according to a first modification of the embodiment of the present invention will be described. 3 is a perspective view showing an internal structure of the rotation detector 110, FIG. 4 is a plan view of the rotation detector 110, and FIG. 5 is a view of the rotation detector 110 viewed from the left direction (−X direction). FIG. 6 is a cross-sectional perspective view of the rotation detector 110 viewed from the line AA shown in FIG. 4, and FIG. 7 is a cross-sectional perspective view of the rotation detector 110 viewed from the line BB shown in FIG. FIG. In FIG. 3, the rotary operation knob 45 is indicated by a two-dot chain line on the assumption that it is transparent, and in FIG. 5, the outer cylinder portion 23 and the rotor 40 of the holder 20 are assumed to be transparent. Displayed with a dotted line. 4 to 7, the rotation operation knob 45 is omitted from the display.

The difference between the rotation detector 110 and the rotation detector 100 is that the structure of the holder 20 of the rotation detector 110 is different from the structure of the holder 10 of the rotation detector 100. Therefore, the detailed description of the same configuration between the rotation detector 110 and the rotation detector 100 is omitted. In addition, the same reference numerals are used except for the holder 20.

As shown in FIG. 3, the rotation detector 110 includes the insulating substrate 50, the holder 20 fixed to the insulating substrate 50, the rotor 40 rotatably held by the holder 20, and the rotation detector 100. A rotation operation knob 45 fixed to the rotor 40 and a loop antenna 30 composed of a conducting wire 31 wound around the holder 20 are provided.

In the center of the insulating substrate 50, an illumination element 53 is disposed as shown in FIG. The illumination element 53 is formed of an LED (Light （Emitting Diode) and is provided to illuminate the rotary operation knob 45 from below. The illumination element 53 may be provided in the rotation detector 100 according to the embodiment of the present invention.

As shown in FIG. 3, the holder 20 includes an outer cylinder part 23 and an inner cylinder part 21 located inside the outer cylinder part 23. The outer cylinder part 23 includes a cylindrical outer cylinder part body 23a and a pedestal part 23b which is located below the outer cylinder part body 23a and has a diameter larger than the diameter of the outer cylinder part body 23a. Moreover, the inner cylinder part 21 consists of the cylindrical inner cylinder part main body 21a and the protrusion part 21b extended above the inner cylinder part main body 21a. The outer cylinder part 23 and the inner cylinder part 21 are integrally formed.

The rotor 40 is held so as to be in contact with the outer cylinder main body 23 a in the outer cylinder 23 of the holder 20. Further, like the rotation detector 100, the conducting wire 31 of the loop antenna 30 is provided on the outer surface of the protruding portion 21b. That is, the loop antenna 30 is provided on the inner cylinder portion 21 of the holder 20.

The rotation detector 110 is provided with a plurality (two) of terminals 25 having conductivity as shown in FIGS. The terminal 25 is formed integrally with the inner cylinder main body 21 a of the holder 20, and protrudes downward from the lower surface of the holder 20. Further, as shown in FIG. 5, the tip 25 a is inserted through an insertion hole 50 b provided in the insulating substrate 50 and protrudes from the lower surface of the insulating substrate 50.

One conductor 31 on one end side of the loop antenna 30 is entangled with a protrusion 21d provided on the holder 20 as shown in FIGS. 4 and 6, and then extends downward as shown in FIG. is doing. And the front-end | tip part 31a of the one conducting wire 31 is wound around the terminal 25 several times, and is electrically connected by solder etc. As shown in FIG. The same applies to the other conducting wire 31 on the other end side of the loop antenna 30 and its distal end portion 31a.

As shown in FIGS. 4 and 5, the holder 20 has a groove 21 c in the vertical direction from the upper end to the lower end of the inner cylinder portion main body 21 a of the inner cylinder portion 21 on the side where the one conducting wire 31 of the loop antenna 30 is provided. Is formed. And a part of the said conducting wire 31 is accommodated in the groove | channel 21c. The same applies to the lead wire 31 on the other end 31a side. Also in this case, the groove 21c is formed in the vertical direction from the upper end to the lower end of the inner cylinder part main body 21a of the inner cylinder part 21 on the side where the other conductor 31 is present, and the conductor 31 on the other tip part 31a side. A part of is accommodated in the groove 21c.

In addition, the structure of the holder 20 with respect to the conducting wire 31 in the rotation detector 110 described above can be similarly applied to the holder 10 in the rotation detector 100 described above.

Hereinafter, the effects of the present embodiment will be described.

Since the rotation detector 100 according to the embodiment of the present invention can form the loop antenna 30 by winding the conducting wire 31 around the holder 10, it is easy to incorporate an antenna having a long overall length. In addition, since the loop antenna 30 does not come into contact with the rotating portion such as the rotor 40 and the rotation operation knob 45 and is covered with the rotation operation knob 45, it is possible to prevent a person from touching the loop antenna 30. Therefore, it is difficult to break down. Furthermore, since the loop antenna 30 is formed on the protruding portion 10b of the holder 10 close to the rotary operation knob 45, when the loop antenna 30 is used for short-range wireless communication, communication can be performed at a closer distance, and stable wireless communication is possible. Communication is possible.

In addition, when the rotation detector does not require the loop antenna 30, the rotation detector 110 does not include the inner cylinder portion 21, so that the rotation detector that includes the loop antenna 30 and the rotation detection that does not include the loop antenna 30. The parts can be shared.

In addition, since the rotation detector 110 is provided with the groove 21c in the holder 20, the lead wire 31 for connecting the loop antenna 30 and the terminal 25 can be reliably held.

As described above, since the rotation detector of the present invention can form a loop antenna by winding a conducting wire around a holder, an antenna having a long overall length can be easily incorporated. Further, since the loop antenna does not come into contact with the rotating portion such as the rotor and the rotation operation knob and is covered with the rotation operation knob, it is possible to prevent a person from touching the loop antenna. Therefore, it is difficult to break down. Furthermore, since the loop antenna is formed on the protruding portion of the holder near the rotary operation knob, when the loop antenna is used for short-range wireless communication, communication can be performed at a closer distance, and stable wireless communication is possible. .

The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

DESCRIPTION OF SYMBOLS 10 Holder 10a Main body part

10b Protrusion part

10c Base part 17 Mounting metal plate 17a Mounting leg 19 Encoder terminal 20 Holder 21 Inner cylinder part 21a Inner cylinder part body 21b Projection part 21c Groove 21d Protrusion 23 Outer cylinder part 23a Outer cylinder part body 23b Base Portion 25 Terminal 25a Tip 30 Loop antenna 31 Conductor 31a Tip 40 Rotor 40a Upper end 45 Rotation knob

45a Upper surface

45b Side surface 45c Cavity 50 Insulating substrate

50a Mounting hole

50b Insertion hole 51 Short-range wireless communication circuit 53 Illuminating element 100 Rotation detector 110 Rotation detector

Claims

An insulating substrate, a holder fixed to the insulating substrate, a rotor rotatably held by the holder, a rotation operation knob fixed to the rotor, and a loop antenna comprising a conductive wire wound around the holder; With
The rotor is provided on the outer side of the holder, the holder has a protruding part protruding upward from the upper end of the rotor, and the loop antenna is provided on an outer surface of the protruding part. And
The rotation operation knob covers the protrusion and the loop antenna;
A rotation detector characterized by that.
The holder is composed of an outer cylinder part, an inner cylinder part located inside the outer cylinder part and integrated with the outer cylinder part,
The rotor is held so as to be in contact with the outer cylinder part, and the protruding part is provided on the inner cylinder part.
The rotation detector according to claim 1.
And having a plurality of terminals integrally formed with the holder, the terminals projecting from the lower surface of the holder,
A groove is formed in the holder, a leading end portion of the conducting wire is electrically connected to the terminal, and a part of the conducting wire is accommodated in the groove.
The rotation detector according to claim 1, wherein the rotation detector is provided.