KR20080105432A - Rotational inputting apparatus - Google Patents

Abstract

A rotational inputting apparatus is provided to perform smooth rotation of a wheel and reduce friction due to wheel rotation. In a rotational inputting apparatus, a center key(120) is positioned at the center and is supported by a center fixing member(140), which is fixed to the circuit board(220) with a holder(146). The wheel(160) is inserted into the outer circumference of the center fixing member so that it is rotatable, and a wheel is fixed on the circuit board with the fixing member(180). A wheel fixing member is inserted into an insertion hole(166) of the wheel and fixed on the circuit so that it is rotated. A detecting unit(222) detects a change of the magnetic field and inputs the information. If the wheel rotates, the change of the magnetic field is generated, so the input of the information according to the rotation of wheel is performed by using a detection value.

Description

Rotary input device {ROTATIONAL INPUTTING APPARATUS}

1 is a plan view of a rotary input device according to an embodiment of the present invention.

2 is a cross-sectional view taken along the line AA ′ in FIG. 1.

Figure 3a is a plan view of a wheel of the rotary input device according to an embodiment of the present invention.

3B is a cross sectional view along line BB ′ of FIG. 3A;

Figure 3c is a rear view of the rotary input device according to an embodiment of the present invention.

Figure 4a is a rear view of the wheel holding member of the rotary input device according to an embodiment of the present invention.

4B is a cross-sectional view taken along the line CC ′ in FIG. 4A.

Figure 5 is a schematic diagram showing a state in which the first uneven portion and the stopper is coupled in the rotary input device according to an embodiment of the present invention.

Figure 6a is a rear view of the center fixing member of the rotary input device according to an embodiment of the present invention.

FIG. 6B is a cross-sectional view taken along the line DD ′ of FIG. 6A.

Figure 7a is a plan view of a wheel of the rotary input device according to another embodiment of the present invention.

FIG. 7B is a cross-sectional view taken along line EE ′ of FIG. 7A;

8 is a cross-sectional view of a wheel fixing member according to another embodiment of the present invention.

9 is a perspective view of a washer according to another embodiment of the present invention.

10 is a perspective view showing a state in which the wheel and the wheel fixing member coupled by the washer according to another embodiment of the present invention.

<Description of Drawing>

100: rotary input device 120: center key

140: center fixing member 160, 160 ': wheel

180, 180 ': wheel fixing member 220: circuit board

The present invention relates to a rotary input device.

In general, portable terminals have numbers 0 to 9 and * and # marks on 12 keypads. In the keypad as described above, consonants and vowels of English letters and Korean characters are described in addition to numbers, and information such as numbers and letters can be input. Recently, navigation keys have been formed at the top of the keypad with various functions such as phone number search, text message creation and management, Internet connection, and the like. There are various types of navigation keys, such as button type and rotary type. Recently, as the spread of the wireless Internet is expanded, the use of the rotary input device capable of various functions such as web page search is increasing.

In addition, the rotary input device is used as an input device such as a rotary switch, a rotary encoder, and a rotary volume in various electronic products such as a television, a camcorder, a personal digital assistant (PDA), and the like. In addition, the rotary input device may be used in various fields such as a portable MP3 player, an optical input device such as a mouse, and the like, thereby enabling more convenient and various inputs.

The present invention provides a rotary input device having a simple configuration and capable of smooth rotation of a wheel.

The present invention is to provide a rotary input device that can give a rotational feel according to the rotation of the wheel.

The rotary input device according to an aspect of the present invention includes a wheel and a wheel fixing member rotatably supporting the wheel, and the wheel is formed with a first uneven portion having a first protrusion and a first recess, and the wheel is fixed. The member is provided with a second protrusion and protrusion having a second protrusion in contact with the first protrusion and a second recess formed between the second protrusion, and the first protrusion and the second protrusion rotate in contact with each other.

Embodiments of the rotary input device according to the present invention may have one or more of the following features. For example, the first protrusions may be formed in the circumferential direction of the wheel, and each of the first protrusions may have the same height. In addition, the direction in which the first recesses and the second recesses are formed may be perpendicular.

The first protrusion and the second protrusion may be in line contact with each other, the second protrusion may have a stop protrusion protruding upward, and the stop protrusion may be caught by the first protrusion when the wheel is rotated.

Discharge grooves may be formed in the second uneven portion. The discharge groove may be formed perpendicular to the direction in which the second recess is formed.

The wheel may include an insertion groove in which the second uneven portion is formed, and the wheel fixing member may be inserted into the insertion groove and have an insertion portion in which the second uneven portion is formed. And the insertion portion can be prevented from being separated from the wheel by bending the engaging projection formed on the back surface of the wheel. The first protrusion and the stopping protrusion may have an arc-shaped cross section having a curvature.

The through hole is formed in the center of the wheel, the center hole may be provided in the through hole. In addition, the center key has a center protrusion protruding downward, and the center protrusion may press the center button formed on the circuit board.

The wheel fixing member includes a fixing member protrusion protruding downward, and the fixing member protrusion may press the side button formed on the circuit board. The wheel fixing member is fixed to the circuit board, the magnet is fixed to the wheel, and the circuit board may be provided with a detection element for detecting the rotation of the magnet.

Hereinafter, an embodiment of a rotary input device according to the present invention will be described in detail with reference to the accompanying drawings, and in the following description with reference to the accompanying drawings, the same or corresponding components are given the same reference numerals and duplicated thereto. The description will be omitted.

1 is a plan view illustrating a rotary input device according to an embodiment of the present invention.

Referring to FIG. 1, the rotary input device 100 according to an exemplary embodiment of the present invention may include a center key 120 having an upper surface 124 exposed to the outside, and a center key (not shown) on an outer circumferential surface of the center key 120. The center fixing member 140 supporting the 120 and the circumferential surface 162 includes a wheel 160 exposed to the outside. In addition, the circuit board 220 is provided with a center button 236 (dotted line display) and side buttons 224, 226, 228, 232, and dotted line display.

The user may execute the center button 236 by pressing the center key 120 or the side buttons 224, 226, 228, and 232 by pressing a specific direction of the wheel 160. In addition, the user may input certain information while rotating the wheel 160.

As described above, the rotary input device 100 according to an embodiment of the present invention may include information input by rotation of the wheel 160, information input by the center button 236, and side buttons 224, 226, 228, and 232. Since information can be input accordingly, various information can be more easily input.

The rotary input device 100 may be used as an information input device in a portable computer, an MP3 player, a game machine, an optical mouse, as well as a portable terminal such as a portable telephone or a PDA.

Although four side buttons 224, 226, 228, and 232 are illustrated in FIG. 1, the number of side buttons can be variously changed as necessary. For example, three or six side buttons may be formed on the circuit board 220.

2 is a cross-sectional view of the rotary input device 100 taken along line AA ′ of FIG. 1.

Referring to FIG. 2, in the rotary input device 100 according to an embodiment of the present invention, a center key 120 is positioned at the center, and the center key 120 is supported by the center fixing member 140. The center fixing member 140 is fixed to the circuit board 220 by the locking part 146. The wheel 160 is rotatably inserted into the outer circumferential surface of the center fixing member 140, and the wheel 160 is fixed to the circuit board 220 by the wheel fixing member 180. The wheel fixing member 180 is rotatably inserted into the insertion groove 166 of the wheel 160 and fixed to the circuit board 220.

The magnet 280 is fixed to the rear surface of the wheel 160, and the detection element 222 is fixed to the circuit board 220 to detect a change in the magnetic field and input information. Accordingly, when the wheel 160 is rotated, a change occurs in the magnetic field generated by the magnet 280, and the detection element 222 grasps the magnetic field, thereby inputting information according to the rotation of the wheel 160.

Hereinafter, a configuration and coupling relationship of a wheel according to an exemplary embodiment of the present invention will be described with reference to FIGS. 2 and 3A to 3C. 3A is a plan view of a wheel of a rotary input device according to an embodiment of the present invention, FIG. 3B is a cross-sectional view taken along line BB ′ of FIG. 3A, and FIG. 3C is a rear view of the rotary input device according to an embodiment of the present invention. It is also.

3A to 3C, the wheel 160 according to an embodiment of the present invention has a circular shape as a whole, and a through hole 164 is formed in the center to accommodate the center fixing member 140. In addition, an insertion groove 166 is formed in the circumferential direction on the rear surface of the wheel 160, and a locking protrusion 168 protrudes downward from the circumference of the insertion groove 166. In addition, the insertion groove 166 is provided with a first uneven portion 176 in which the first protrusion 176a and the first recess 176b are sequentially formed.

Referring to FIG. 3A, the circumferential surface 162 on which the rotation protrusion 172 is formed is exposed to the outside, and the user contacts the rotation protrusion 172 with a finger, and then applies a constant force to the wheel 160 in a clockwise or Rotate counterclockwise. The wheel fixing member 180 rotatably supports the wheel 160.

The center fixing member 140 is inserted into the through hole 164 as shown in FIG. 2. Therefore, the upper surface 124 of the center fixing member 140 and the upper surface 124 of the center key 120 are exposed to the outside through the through hole 164. The wheel 160 rotates around the through hole 164 because the center fixing member 140 inserted into the through hole 164 is fixed to the circuit board 220 and does not rotate.

The insertion groove 166 is formed in the circumferential direction on the rear surface of the wheel 160. As shown in FIG. 2, the wheel fixing member 180 is rotatably inserted into the insertion groove 166. The locking protrusion 168 protrudes downward from the periphery of the insertion groove 166, and a plurality of hooking protrusions 168 are formed at regular intervals. As illustrated in FIG. 2, the wheel fixing member 180 inserted into the insertion groove 166 is prevented from being separated by the bent engaging protrusion 168. The bending of the locking protrusion 168 inserts the wheel fixing member 180 into the insertion groove 166 and then applies a constant force and heat using a jig (not shown), etc., while the locking protrusion 168 faces the outside. By doing so.

In the insertion groove 166, as shown in FIG. 3C, a first uneven portion 176 including the first protrusion 176a and the second recessed portion 176b is formed. The first uneven portion 176 moves along the second uneven portion (see 196 in FIG. 2).

The first protrusion 176a protrudes with a constant height from the bottom surface of the insertion groove 166, and a plurality of first protrusions 176a are arranged in the circumferential direction of the wheel 160. The plurality of first protrusions 176a may all have the same height, which allows the wheel 160 to smoothly rotate when the first protrusion 176a moves along the second protrusion 196a. The first protrusion 176a may be radially formed at the center of the through hole 164. And, as shown in FIG. 5, the first protrusion 176a may have a constant curvature, which is caused by the rotation of the wheel 160 even if the first protrusion 176a is caught by the stopper 192. This is to make it smooth.

The first recessed portion 176b is a groove formed between the first protrusions 176a and its arrangement structure is the same as that of the first protrusions 176a. The first recessed portion 176b serves to reduce friction by reducing the contact area when the first uneven portion 176 is in contact with the second uneven portion 196. That is, since the second protrusion 196a of the second uneven portion 196 contacts only the first protrusion 176a of the first uneven portion 176, it occurs between the wheel 160 and the wheel fixing member 180. It is possible to smooth the rotation of the wheel 160 by reducing the friction.

As shown in FIG. 2, a magnet 280 is attached to the circumference of the insertion groove 166 on the rear surface of the wheel 160. A constant magnetic field is formed around the magnet 280, and the detection element 222 is mounted on the circuit board 220 to face the magnet 280. The magnet 280 also rotates with the rotation of the wheel 160, causing a change in the magnetic field of the detection element 222. As a result, the detection element 222 detects the rotation of the wheel 160 to input certain information. For example, when the wheel 160 is rotated clockwise, the screen moves downward on the display, and when the wheel 160 rotates counterclockwise, the screen moves upward on the display.

A plurality of detection elements 222 are mounted on the circuit board 220 and detect the rotation of the wheel 160 through the change of the magnetic field. The detection element may be a hall sensor, which is a silicon semiconductor, in which electrons are bent in the magnetic field and bent in the direction of movement to generate an electromotive force. The hall sensor generates an electromotive force proportional to the rotation of the magnet 280 attached to the wheel 160 and transmits the electromotive force to an external control device (not shown) through the circuit board 220.

The detection element 222 is, of course, not limited to the hall sensor, and may be anything as long as it can detect the rotation of the magnet 280. For example, the detection element may be a magnetoresistive (MR) sensor or a great magneto resistor (GMR) sensor. MR sensor or GMR sensor is a device whose resistance value changes according to the change of the magnetic field. The MR sensor or the GMR sensor uses the property of changing resistance because the carrier path in the solid is bent by the electromagnetic force. MR sensors or GMR sensors are small in size, have high signal levels, and have high sensitivity, allowing them to be operated in low light and have high temperature stability.

In the present embodiment, the magnetic field of the magnet 280 is used to detect the rotation of the wheel 160, but the present invention is not limited thereto, and various configurations may be employed as long as the rotation of the wheel 160 can be detected. Of course. For example, the rotation of the wheel 160 may be sensed by various methods such as using image processing, sensing a change in variable resistance, or capacitance.

In the method using the image processing, a mark indicating the contrast is alternately attached to the back surface of the wheel 160, and the back surface of the wheel 160 is irradiated using a light emitting diode (LED), The image sensor detects the rotation of the mark generated due to the rotation of the wheel 160, thereby inputting information.

In the method using the variable resistor, the conductor and the non-conductor are alternately arranged around the wheel 160 to recognize the amount of change in the current intensity through which the wheel 160 contacts the conductor and the non-conductor. How to enter. The capacitive type is based on a capacitor provided on the rear surface of the wheel 160 when the user's finger or writing implement rotates along the wheel 160 while contacting the circumferential surface 162 of the wheel 160. It is a method of inputting information by detecting a change in capacitance. As such, when the capacitance is used, the wheel 160 may not rotate.

Hereinafter, the configuration and coupling relationship of the wheel fixing member 180 according to an embodiment of the present invention will be described with reference to FIGS. 2 and 4A to 4B. 4A is a rear view of the wheel fixing member 180 of the rotary input device according to an embodiment of the present invention, and FIG. 4B is a cross-sectional view taken along line CC ′ of FIG. 4A.

Wheel fixing member 180 according to an embodiment of the present invention is a through hole 186 formed in the center, the wheel fixing protrusion 182 protruding downward from the insertion portion 184 is inserted into the insertion groove 166 of the wheel 160. ). The wheel fixing member 180 includes a second protrusion 196 and a stop protrusion 192 protruding upward from the second protrusion 196 formed in the insertion part 184. The wheel fixing member 180 rotatably supports the wheel 160 and at the same time prevents the wheel 160 from being separated.

A part of the wheel 160, the center fixing member 140, and the wheel 120 pass through the through hole 186 formed at the center of the wheel fixing member 180. And the insertion portion 184 of the wheel fixing member 180 is rotatably inserted into the insertion groove 166 formed on the rear surface of the wheel 160 as shown in FIG. A fixing member protrusion 188 is formed at the end of the insertion portion 184 corresponding to the side buttons 224, 226, 228, and 232. The fixing member protrusion 188 is in contact with the side buttons 224, 226, 228 and 232, and acts to press the side buttons 224, 226, 228 and 232 when an external force is applied to the wheel 160. In addition, a second uneven portion 196 is formed at an upper portion of the insertion groove 184.

The second uneven portion 196 is formed along the circumference of the insertion portion 184 and includes a circular second recessed portion 196b and a second protrusion 196a. The second recessed portion 196b is a groove formed between the second protrusions 196a and serves to reduce friction by reducing the contact area when the second protrusions 196a are in contact with the first protrusions 176a. The second protrusion 196a rotates while being in contact with the first protrusion 176a. As shown in FIG. 2, since the two protrusions rotate while being in line contact, friction is reduced to smoothly rotate the wheel 160. .

The direction in which the second protrusion 196a and the second recessed portion 196b are formed is perpendicular to the direction in which the first protrusion 176a and the second recessed portion 176b are formed.

The cross-sectional shape of the second protrusion 196a may be an arc shape having a constant curvature, as shown in FIG. 2. By forming the cross section of the second protrusion 196a in an arc shape, the second protrusion 196a and the second protrusion 176a may be in line contact.

Referring to FIG. 4A, a discharge groove 194 may be formed in the second uneven portion 196. The discharge groove 194 is a groove formed radially at the center of the through hole 186 to communicate with the outside. Since the wheel 160 and the wheel fixing member 180 are generally manufactured by a synthetic resin or the like, certain debris are formed by friction due to the rotation of the wheel 160. Foreign matter formed by the rotation of the wheel 160 may be discharged to the outside through the discharge groove (194).

The stopper 192 protrudes upward on the second uneven portion 196. The stop protrusions 192 are formed at regular intervals along the circumference of the second protrusion 196a. The stopper 192 may have an arc shape having a curvature in cross section.

As shown in FIG. 2, the wheel fixing protrusion 182 protruding downward from the wheel fixing member 180 is inserted into and fixed to the second fixing hole 246 of the circuit board 220. As a result, the wheel fixing member 180 is fixed to the circuit board 220 to rotatably support the wheel 160.

5 is a schematic view showing a state where the stop projection 192 is positioned at the first joining portion 176b of the first uneven portion 176.

As shown in FIG. 5, a portion of the detent 192 is located between the first protrusion 176a and the first protrusion 176a, ie, the first recess 176b. Therefore, when the wheel 160 is rotated, the first protrusion 176a is caught by the stop protrusion 192 at a predetermined interval, thereby giving the user a feeling of rotation. The stopper 192 may have an arc shape having a predetermined curvature in cross section. This is to facilitate the rotation of the wheel 160 by allowing the stop protrusion 192 to easily move along the inclined surface of the first protrusion 176a.

Hereinafter, the center fixing member 140 will be described with reference to FIGS. 2 and 6A to 6B. FIG. 6A is a rear view of the center fixing member 140 and FIG. 6B is a sectional view taken along the line DD ′ of FIG. 6A.

As shown in FIGS. 6A and 6B, the center fixing member 140 has an insertion hole 142 that can accommodate the center key 120. An inner step 144 is formed on the inner circumferential surface of the insertion hole 142 as shown in FIG. 6B. As shown in FIG. 2, the inner step 144 is engaged with the outer step 122 of the center key 120. The center key 120 inserted into the insertion hole 142 moves a predetermined distance up and down within the insertion hole 142.

The locking portion 146 protrudes downward at regular intervals around the center fixing member 140. A locking hook 146a is formed at the end of the locking portion 146. Referring to FIG. 2, the catching portion 146 is inserted into the first fixing hole 244 formed in the circuit board 220, wherein the catching hook 146a formed at the end of the catching portion 146 is the circuit board 220. It is caught on the back side. Therefore, the locking portion 146 fixes the center fixing member 140 to the circuit board 220 and prevents the circuit board 220 from being separated from the circuit board 220.

As such, the center fixing member 140 guides the vertical movement of the center key 120 and at the same time serves to rotatably support the wheel 160. The wheel 160 is inserted into the outer circumferential surface of the center fixing member 140.

Hereinafter, the center key 120 will be described with reference to FIG. 2.

2, the center key 120 according to an embodiment of the present invention has a circular top surface 124 and has a cylindrical shape as a whole. In addition, an outer step 122 is formed on an outer circumferential surface of the center key 120. In addition, a center protrusion 126 is provided on the lower surface of the center key 120.

The upper surface 124 is formed in a circular shape as shown in Figure 1 is exposed to the outside, the external force for pressing the center button 236, such as being pressed by the user acts.

The outer step 122 is formed along the outer circumference of the center key 120. The outer step 122 is caught by the inner step 144 of the center fixing member 140 as shown in FIG. In addition, since the center protrusion 126 formed on the bottom surface of the center key 120 is in contact with the center button 236, the outer step 122 presses the inner step 144 to a constant pressure, and thus the center key 120 ) Is fixed to the center fixing member 140.

The center protrusion 126 protruding downward from the lower surface of the center key 120 is in contact with the center button 236 as shown in FIG. 2. Therefore, when the external force is applied to the top surface 124 of the center key 120, the center key 120 is moved downwards, whereby the center projection 126 by pressing the center button 236, a certain function is performed. When the external force applied to the center key 120 is removed, the center key 120 is moved upward by the elastic force of the center button 236 itself, so that the outer step 122 is caught by the inner step 144. 120) This movement stops.

Hereinafter, the center button 236 and the side buttons 224, 226, 228, and 232 formed on the circuit board will be described with reference to FIG. 2.

The center button 236 and the side buttons 224, 226, 228, and 232 are formed on the circuit board 220. The center button 236 may be pressed by the center protrusion 126 of the center key 120 to perform a predetermined function. For example, a function such as executing a selected menu or connecting to the wireless Internet may be performed. The side buttons 224, 226, 228, and 232 are formed on the circuit board 220 to face the fixing member protrusion 188 of the wheel fixing member 180, and four are provided at regular intervals. Of course, the number and the spacing of the side buttons can be variously adjusted as necessary as described above. The side button may be pressed by the fixing member protrusion 188 to perform various functions. For example, the four side buttons 224, 226, 228, and 232 can function as up, down, left and right navigation buttons, and can be accessed by shortcut keys such as launching an MP3 player, enabling short message function, wireless internet connection, and searching phone numbers. Function can be performed.

The center button 236 and the side buttons 224, 226, 228, and 232 may be formed in various ways, such as a pressure sensor or a contact sensor, as well as a dome button formed of a metal.

The first fixing hole 244 and the second fixing hole 246 are formed in the circuit board 220. The locking part 146 of the center fixing member 140 is inserted into and fixed to the first fixing hole 244. The wheel fixing protrusion 182 of the wheel fixing member 180 is inserted into and fixed to the second fixing hole 246.

Hereinafter, the wheel 160 ′ and the wheel fixing member 180 ′ according to another embodiment of the present invention will be described with reference to FIGS. 7A to 10.

7A is a plan view of a wheel 160 'according to another embodiment of the present invention, and FIG. 7B is a cross-sectional view taken along the line EE' of FIG. 7A.

7A to 7B, the wheel 160 ′ according to another embodiment of the present invention has the wheels described above except that the locking protrusion 168 ′ is inserted into the washer (see 420 of FIG. 9). It is the same as the structure of 160. Therefore, the following description will focus on the differences in construction.

The locking protrusion 168 ′ according to the present embodiment is arranged in the circumferential direction around the through hole 164, and is subsequently inserted into the insertion hole (422 of FIG. 9) of the washer (420 of FIG. 9) and then thermocompressed. This prevents deviation from the insertion hole. Since the washer 420 is caught by the wheel fixing member 180 'fixed to the circuit board, separation of the wheel 160' is prevented.

8 is a cross-sectional view of the wheel fixing member 180 'according to another embodiment of the present invention.

Referring to FIG. 8, the wheel fixing member 180 ′ according to another embodiment of the present invention may include the rest of the wheel fixing member 180 except for the configuration of the stop protrusion 192 ′ and the second protrusion 198. Since the same as or corresponding to the configuration, it will be described below with a focus on the configuration differences.

The stop protrusion 192 ′ is formed on the second protrusion 198 and is somewhat higher than the second protrusion 198. Therefore, the stop protrusion 192 'is caught by the first uneven portion 176 of the wheel 160' and gives a sense of rotation to the user. The number of stop protrusions 192 'may be variously changed depending on the material of the wheel fixing member 180' or the configuration of the second protrusion 198.

The second protrusion 198 has a triangular cross section and, unlike the first protrusion 176a, is formed like a single thread. The second protrusion 198 rotates in contact with the first protrusion 176a formed on the rear surface of the wheel 160 ′.

FIG. 9 is a perspective view of a washer 420 coupling a wheel 160 'and a wheel fixing member 180' according to another embodiment of the present invention, and FIG. 10 is a wheel 160 'and a wheel fixing member 180'. ) And a washer 420 are perspective views.

9 and 10, the washer 420 has a donut shape and a plurality of insertion holes 422 are formed in the circumferential direction thereof. The locking projection 168 of the wheel 160 ′ is inserted into and inserted into the insertion hole 422. In addition, the washer 420 is caught on the rear surface of the wheel fixing member 180 fixed to the circuit board 220, thereby preventing the wheel 160 ′ from being separated to the outside.

Although the embodiments of the present invention have been described above, various changes and modifications of the present invention should also be construed as falling within the scope of the present invention as long as the technical idea of the present invention is implemented.

The present invention can provide a rotary input device having a simple configuration and capable of smooth rotation of the wheel.

The present invention can provide a rotary input device that can give a rotational feel according to the rotation of the wheel.

Claims (14)

A wheel; A wheel fixing member rotatably supporting the wheel, The wheel has a first uneven portion having a first protrusion and a first recess, and the wheel fixing member has a second protrusion contacting the first protrusion and a second recess formed between the second protrusion. 2 irregularities are formed, And the first protrusion and the second protrusion rotate in contact with each other. The method of claim 1, And the first protrusion is formed in the circumferential direction of the wheel, and each of the first protrusions has the same height. The method of claim 2, And a direction in which the first recesses and the second recesses are formed in a vertical direction. The method of claim 1, And the first protrusion and the second protrusion are in line contact with each other. The method of claim 1, The second protrusion is provided with a stop protrusion protruding upwards, The stopper is a rotary input device, characterized in that the first projection is caught in the rotation of the wheel. The method of claim 1, Rotary input device, characterized in that the discharge groove is formed in the second uneven portion. The method of claim 6, And the discharge groove is formed perpendicularly to the direction in which the second recess is formed. The method of claim 1, The wheel has an insertion groove in which the second uneven portion is formed, the wheel fixing member is inserted into the insertion groove, the rotary input device, characterized in that it has an insertion portion is formed in the second uneven portion. The method of claim 8, The insertion unit is a rotary input device, characterized in that the departure from the wheel is prevented by the bending protrusion formed on the back surface of the wheel. The method of claim 5, And the first protrusion and the stopper have an arc-shaped cross section having a curvature. The method of claim 1, The through hole is formed in the center of the wheel, Rotary input device, characterized in that the through-hole is provided with a center key. The method of claim 11, The center key has a downward center projection, The center projection is a rotary input device, characterized in that for pressing the center button formed on the circuit board. The method of claim 1, The wheel fixing member includes a fixing member protrusion protruding downward, The fixing member protrusion is a rotary input device, characterized in that for pressing the side button formed on the circuit board. The method of claim 1, The wheel fixing member is fixed to the circuit board, The wheel is fixed to the magnet, the circuit board is a rotary input device, characterized in that the detection element for detecting the rotation of the magnet is provided.

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