KR101602322B1 - Information input unit - Google Patents

Abstract

An information input device for an electronic device is disclosed. The information input device is provided with a square or arc-shaped magnet and a Hall sensor on the substrate so as to oppose the Hall sensor in the radial direction, and the magnet and the hall sensor are communicated with and blocked by the portion of the rotary cover which is rotatably provided on the substrate. Thus, the rotational direction of the rotary cover is sensed by the magnetic flux amount of the magnet sensed by the hall sensor according to the forward / reverse rotation of the rotary cover side. Therefore, since the size of the magnet is relatively reduced and the back yoke is not required, the cost is reduced. Further, since the magnet is provided in the radial direction and a back yoke provided in the axial direction is not required, it is possible to reduce the thickness.

Description

INFORMATION INPUT UNIT [0001]

The present invention relates to an information input device for an electronic device.

Today, electronic devices such as mobile communication devices are provided with a button type information input device for generating a signal by a user's pressing operation or a wheel type information input device for generating a signal by a user's turning operation.

A conventional wheel-type information input device will be described with reference to Fig. 1 is a sectional view of a conventional information input device.

As shown, the substrate 13 is coupled to the base 11. A ring-shaped holder 15 is fixed to the upper side of the substrate 13 and a ring-shaped rotary cover 25 is rotatably coupled to the holder 15 via a support frame 21 and a support member 23 do.

A ring-shaped magnet 31 having a plurality of poles alternating with N poles and S poles is coupled to the support member 23 along the circumferential direction, and rotates together with the rotation cover 25. [ A back yoke 33 is interposed between the magnet 31 and the support member 23 to prevent the magnetic flux of the magnet 31 from leaking.

The substrate 13 is provided with a pair of hall sensors 13a and 13b for sensing the magnetic flux change of the magnet 31 rotating together with the rotation cover 25 and sensing the rotation direction of the rotation cover 25. [ At this time, one of the Hall sensors 13a and the other Hall sensor 13b is disposed with a phase difference with respect to the N pole or S pole of the magnet 31, And outputs a signal.

In the conventional information input device as described above, since the magnet 31 is formed in a ring shape, a relatively large amount of material is required, and a back yoke 33 is separately required. Therefore, there is a drawback that the cost increases.

Further, since the magnet 31 and the back yoke 33 are stacked in the axial direction, there is a disadvantage that the thickness becomes thick.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art as described above, and it is an object of the present invention to provide an information input apparatus which can reduce a cost.

It is another object of the present invention to provide an information input device that can be thinned.

According to an aspect of the present invention, there is provided an information input apparatus comprising: a fixing unit; And a rotation part rotatably installed on the fixing part,

A Hall sensor for sensing the magnetic flux of the magnet and the magnet is installed in the fixed portion, and the hall sensor senses and detects the magnetic flux of the magnet as the rotating portion rotates.

The information input device according to the present invention is characterized in that a rectangular or arc-shaped magnet and a hall sensor are provided in a radial direction against a substrate, and the magnet and the hall sensor are communicated and blocked by a portion of the rotary cover, . Thus, the rotational direction of the rotary cover is sensed by the magnetic flux amount of the magnet sensed by the hall sensor according to the forward / reverse rotation of the rotary cover side. Therefore, since the size of the magnet is relatively reduced and the back yoke is not required, the cost is reduced.

Further, since the magnet is provided in the radial direction and a back yoke provided in the axial direction is not required, it is possible to reduce the thickness.

Hereinafter, an information input apparatus according to embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a partially exploded perspective view of an information input apparatus according to an embodiment of the present invention, and FIG. 3 is an assembled cross-sectional view of FIG.

As shown in the figure, the information input apparatus according to the present embodiment includes a fixing unit having a substrate 110, a base 120, and a holder 130.

Hereinafter, referring to the directions and surfaces of the other components including the substrate 110, it is assumed that a direction toward the upper side of the substrate 110 in the vertical direction and a direction from the upper side and the upper side, "

A base 120 is coupled to a lower surface of the substrate 110 and a plurality of brackets 121 are formed on the base 120 to protrude toward the upper surface of the substrate 110. At this time, the bracket 121 is formed radially with respect to the imaginary vertical center line.

The holder 130 is formed in a ring shape and is concentric with the imaginary vertical center line, and is fixed to the upper surface side of the substrate 110. The holder 130 is fixed to the substrate 110 side because the protrusion 131 protruding from the outer circumferential surface side is inserted into the bracket 121. [

On the upper surface side of the holder 130, a rotary part having a ring-shaped rotary cover 140 concentric with the holder 130, a ring-shaped support frame 150 having magnetic properties, and a ring- Lt; / RTI >

The support frame 150 is coupled to the inner surface of the lower surface of the rotation cover 140 and the rotation cover 140 and the support frame 150 are integrally coupled to each other by the support member 160. The outer peripheral surface side of the support frame 150 is rotatably coupled to the inner peripheral surface side of the holder 130 so that the rotary cover 140 is rotatably installed on the holder 130.

On the upper surface of the substrate 110, a magnet 112 having a rectangular shape and a Hall sensor 115 for sensing the magnetic flux of the magnet 112 are installed. The hall sensor 115 senses and detects the magnetic flux of the magnet 112 as the rotation unit rotates.

A plurality of communicating tubes 152 are formed on the outer circumferential surface of the support frame 150 so as to extend between the magnet 112 and the hall sensor 115, Holes 152a are formed at regular intervals.

The magnets 112 provided on the substrate 110 have a first magnet 112a and a second magnet 112b of the same shape and structure having mutually spaced intervals in the circumferential direction, The second hall sensor 115 has a first hall sensor 115a and a second hall sensor 115b having an interval along the circumferential direction.

At this time, the first magnet 112a and the first hall sensor 115a are installed in the same radial direction to have an interval, and the second magnet 112b and the second hall sensor 115b are installed in the same radial direction, I have. Accordingly, when the rotation unit is rotated, the first magnet 112a, the first hall sensor 115a, the second magnet 112b, and the second hall sensor 115b are communicated with each other and blocked by the communication hole 152a do.

When the first magnet 112a and the first hall sensor 115a, the second magnet 112b and the second Hall sensor 115b are in communication with each other, the first and second Hall sensors 115a and 115b are connected to the first And the first magnet 112a and the first hall sensor 115a, the second magnet 112b, and the second Hall sensor 115b are mutually non-magnetized The first and second Hall sensors 115a and 115b sense the magnetic flux of the first and second magnets 112a and 112b.

The magnet 112 may be located inside and the hall sensor 115 may be located outside on the basis of the partition frame 152 and the magnet 112 may be located on the outside and the hall sensor 115 may be located on the inside There is also water.

Reference numeral 180 denotes a transparent window.

The information input device according to the present embodiment senses the rotating direction of the rotating part by the magnetic fluxes of the first and second magnets 112a and 112b sensed by the first and second hall sensors 115a and 115b, respectively.

Detection of the rotation direction of the rotation unit will be described with reference to FIG. 4A to FIG. 4A and 4B show the operation of the information input device according to an embodiment of the present invention, which is a cross-sectional view taken along line AA of Fig. 2, and Fig. 5 is a cross- The magnetic flux of the magnet detected by the Hall sensor is shown.

The first magnet 112a and the second magnet 112b have a phase difference with respect to the communication hole 152a of the support frame 150 as shown in FIG. That is, when the first magnet 112a completely opposes or completely biases the one communication hole 152a, the second magnet 112b is partially opposed to the other communication hole 152a.

4A, if the rotation frame 140 (see FIG. 3) is rotated clockwise to rotate the support frame 150 in the forward direction, the first magnet 112a and the first hall sensor 115a And the area of the opposing face of the second magnet 112b and the second Hall sensor 115b gradually increases and then decreases.

More specifically, by the rotation of the support frame 150, as shown by the dotted line in Fig. 4A, the first magnet 112a opposed to the first magnet 112a through the communication hole 152a and the first magnet 112a facing the first hall sensor 115a The opposing area between the second magnet 112b and the second Hall sensor 115b gradually increases until the area is reduced to about 1/2 and the area of the opposing face of the first magnet 112a and the first Hall sensor 115a The opposite area between the second magnet 112b and the second hall sensor 115b gradually decreases from the moment when the magnetism becomes about 1/2 or more.

When the supporting frame 150 is further rotated in the forward direction with the first magnet 112a completely opposed to the communication hole 152a, the facing area between the first magnet 112a and the first hall sensor 115a gradually increases And the facing area between the second magnet 112b and the second hall sensor 115b is gradually decreased and then increased. Also, the area of the second magnet 112b and the second Hall sensor 115b facing each other gradually decreases until the area of the opposing face of the first magnet 112a and the first Hall sensor 115a becomes about 1/2, The opposing area between the second magnet 112b and the second hall sensor 115b gradually increases from the moment when the facing area between the first magnet 112a and the first Hall sensor 115a becomes approximately 1/2 or more.

Therefore, when the support frame 150 is rotated in the normal direction, the opposing area between the first magnet 112a and the first hall sensor 115a and the opposing area between the second magnet 112b and the second hall sensor 115b, It changes repeatedly in one form. Then, the magnetic fluxes of the first and second magnets 112a and 112b sensing the first and second hall sensors 115a and 115b, respectively, are output while changing in the same direction as the normal direction as shown in FIG. 5 .

4B, when the support frame 150 is rotated in the opposite direction, the opposing area between the first magnet 112a and the first hall sensor 115a gradually increases, and the second magnet 112b The opposite area of the second hall sensor 115b gradually decreases and then increases.

More specifically, by the rotation of the support frame 150, as shown by a dotted line in Fig. 4B, the first magnet 112a opposed to the first magnet 112a through the communication hole 152a and the opposed first hall sensor 115a The opposing area between the second magnet 112b and the second Hall sensor 115b gradually decreases until the area is reduced to about 1/2 and the area of the opposing face of the first magnet 112a and the first Hall sensor 115a The opposite area between the second magnet 112b and the second hall sensor 115b gradually increases from the moment when the magnetism becomes about 1/2 or more.

When the supporting frame 150 is further rotated in the forward direction with the first magnet 112a completely opposed to the communication hole 152a, the facing area between the first magnet 112a and the first hall sensor 115a gradually increases And the opposing area between the second magnet 112b and the second hall sensor 115b gradually increases and then decreases. The area of the second magnet 112b and the area of the second hall sensor 115b facing each other gradually increases until the facing area between the first magnet 112a and the first hall sensor 115a becomes approximately 1/2, The opposing area between the second magnet 112b and the second Hall sensor 115b gradually decreases from the instant when the facing area between the first magnet 112a and the first hall sensor 115a becomes approximately 1/2 or more.

Accordingly, when the support frame 150 is rotated in the opposite direction, the opposed area between the first magnet 112a and the first hall sensor 115a and the opposed area between the second magnet 112b and the second hall sensor 115b It changes repeatedly in one form. Then, the magnetic fluxes of the first and second magnets 112a and 112b sensing the first and second hall sensors 115a and 115b, respectively, are output while changing in the reverse direction as shown in FIG. 5 .

That is, when the support frame 150 rotates in the forward direction, the magnetic flux amounts of the first and second magnets 112a and 112b sensed by the first and second Hall sensors 115a and 115b and the reverse direction of the support frame 150 Since the magnetic flux amounts of the first and second magnets 112a and 112b sensed by the first and second hall sensors 115a and 115b during rotation are different from each other, do.

Since the size of the magnet 112 is relatively small and the back yoke is not required, the cost of the information input apparatus according to the present embodiment is reduced. Since the magnets 112 and the Hulsenser 115 are installed in the radial direction, it is possible to reduce the thickness.

The operation of the information input apparatus according to the present embodiment will be described with reference to FIG.

When the support frame 150 is rotated by the rotation cover 140, the amounts of magnetic fluxes of the first and second magnets 112a and 112b sensed by the first and second Hall sensors 115a and 115b are changed. Then, the control circuit of the product detects the rotation direction and the rotation amount of the rotation cover 140 according to the magnetic flux amount sensed by the first and second Hall sensors 115a and 115b, The scroll bar moves on the display part of the product to specify the desired picture or symbol.

FIG. 6 is a top cross-sectional view of an information input apparatus according to another embodiment of the present invention.

As shown in the figure, the magnet 212 is formed in a arc shape and provided with one magnet. The first hall sensor 215a is installed in the same radial direction as the one end of the magnet 212 and the second hall sensor 215b is installed in the same radial direction as the other end of the magnet 212. [

The one end side and the other end side of the magnet 212 have a phase difference with respect to the communication hole 252a. That is, when one end side of the magnet 212 is completely opposite to the one communication hole 252a or is totally biased, the other end side is partially opposed to the other communication hole 252a.

FIG. 7 is a cross-sectional view of an information input apparatus according to another embodiment of the present invention.

As shown in the figure, the rotation unit includes a ring-shaped rotation cover 340, a ring-shaped support frame 350 coupled to the rotation cover 340 and rotatably and rotatably coupled to the holder 330, a rotation cover 340, And a support frame 360. The ring-shaped opening and closing member 370 has a magnetic property and is coupled to the support frame 350. The support frame 350 is formed of a magnetic material.

The opening and closing member 370 is extended toward the substrate 310 to partition the magnet 312 and the hall sensor 315 and a plurality of communication holes 372a are formed at even intervals.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Of course.

1 is a sectional view of a conventional information input device;

2 is a partially exploded perspective view of an information input apparatus according to an embodiment of the present invention;

Figure 3 is an assembled sectional view of Figure 2;

4A and 4B are views showing the operation of the information input apparatus according to one embodiment of the present invention, and are cross-sectional views taken along the line A-A in Fig.

FIG. 5 is a graph showing the magnetic flux amount of the magnet detected by the Hall sensor according to the normal rotation of the support frame shown in FIGS. 4A and 4B. FIG.

6 is a top cross-sectional view of an information input apparatus according to another embodiment of the present invention.

7 is a sectional view of an information input apparatus according to another embodiment of the present invention.

Description of the Related Art [0002]

110: substrate 120: base

130: holder 140: rotating cover

150: support frame 270: opening / closing member

Claims (23)

And a rotating portion rotatably installed on the fixed portion, Wherein the fixed portion includes a magnet and a Hall sensor for sensing the magnetic flux of the magnet in the same radial direction, Wherein the fixing portion has a substrate on which the magnet and the Hall sensor are mounted and a holder coupled to the substrate, The rotary unit includes a ring-shaped support frame coupled to the holder so as to be rotatable in normal and reverse directions, a ring-shaped rotation cover coupled to the support frame, a support member integrally connecting the rotation cover and the support frame, Wherein the support frame is formed with a partition wall extending toward the substrate and positioned between the magnet and the hall sensor, A plurality of communication holes communicating between the hall sensor and the magnet are formed in the partition plate, Wherein the plurality of communication holes communicate and block the hole sensor and the magnet by rotation of the rotation part, whereby the hall sensor senses and detects the magnetic flux of the magnet. delete delete delete delete The method according to claim 1, Wherein the support frame is a magnetic body. And a rotating portion rotatably installed on the fixed portion, Wherein the fixed portion includes a magnet and a Hall sensor for sensing the magnetic flux of the magnet in the same radial direction, Wherein the fixing portion has a substrate on which the magnet and the Hall sensor are mounted and a holder coupled to the substrate, The rotation unit includes a ring-shaped support frame rotatably and rotatably coupled to the holder, a ring-shaped rotation cover coupled to the support frame, a support member integrally coupling the rotation cover and the support frame, And an opening / closing member disposed between the hall sensor and the magnet for communicating and blocking the hall sensor and the magnet, Wherein the opening and closing member is provided with a plurality of communication holes communicating with the hall sensor and the magnet, Wherein the plurality of communication holes communicate and block the hole sensor and the magnet by rotation of the rotation part, whereby the hall sensor senses and detects the magnetic flux of the magnet. 8. The method of claim 7, Wherein the opening and closing member is a magnetic body. 9. The method according to any one of claims 1 to 8, And the magnet is located inside the hall sensor. 9. The method according to any one of claims 1 to 8, And the magnet is located outside the hall sensor. delete delete 8. The method of claim 1 or 7, Wherein the communication holes are formed at regular intervals. 14. The method of claim 13, Wherein the magnet is provided in one piece. 15. The method of claim 14, Wherein the magnet is arc-shaped. 15. The method of claim 14, Wherein the Hall sensor has a first Hall sensor installed in the same radial direction as the one end of the magnet and a second Hall sensor installed in the same radial direction as the other end of the magnet. 17. The method of claim 16, Wherein one end side and the other end side of the magnet have a phase difference with respect to the communication hole. 17. The method of claim 16, Wherein one end side of the magnet is completely opposite to or completely biased from any one of the communication holes, and the other end side faces only a part of the other communication hole. 14. The method of claim 13, Wherein the magnet has a first magnet and a second magnet having mutually spaced intervals along the circumferential direction. 20. The method of claim 19, Wherein the first and second magnets have a rectangular shape. 20. The method of claim 19, Wherein the hall sensor has first and second Hall sensors installed in the same radial direction as the first and second magnets, respectively. 22. The method of claim 21, Wherein the first magnet and the second magnet have a phase difference with respect to the communication hole. 22. The method of claim 21, And the second magnet is opposed to only a part of the other one of the communication holes when the first magnet is completely opposed to or completely biased from any one of the communication holes.

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