WO2024063221A1

WO2024063221A1 - Portable controller

Info

Publication number: WO2024063221A1
Application number: PCT/KR2022/021624
Authority: WO
Inventors: 이정연; 김유진; 민강희; 최성인; 김항석; 주원석
Original assignee: 엘지전자 주식회사
Priority date: 2022-09-22
Filing date: 2022-12-29
Publication date: 2024-03-28

Abstract

A portable controller comprises: a basic controller including a handle part; and an extension module attachable to or detachable from the basic controller, wherein the basic controller includes: the handle part which extends in a lengthwise direction and is gripped by a user's hand; an operation body positioned in front of the handle part; a user input part positioned at the operation body; a first connector formed at the operation body; and a first coupling rail formed at the operation body, and the expansion module includes: a module body including a coupling part in contact with the operation body; a second connector formed at the coupling part and fastened to the first connector; and a second coupling rail slidably fastened in the lengthwise direction of the first coupling rail. The portable controller allows the expansion module to be easily attached thereto or detached therefrom to be able to expand and change the function thereof.

Description

portable controller

The present invention relates to a controller for controlling extended reality (XR: eXtended Reality) devices.

Virtual Reality (VR) technology provides objects and backgrounds in the real world only as computer graphics (CG) images, and Augmented Reality (AR) technology provides virtual computers created on images of real objects. It also provides graphic images, and mixed reality (MR: Mixed Reality) technology is a computer graphics technology that mixes and combines virtual objects in the real world. The aforementioned VR, AR, MR, etc. are all simply referred to as XR (extended reality) technologies.

XR technology includes devices that provide images in order to provide images in graphics, and a representative example is a device worn directly on the head, such as a head mounted display (HMD).

A head-mounted display that is worn on the head can use a portable controller that the user holds in his hand to input commands. There is also a wired type, but recently wireless type portable controllers that exchange data wirelessly are becoming popular.

Portable controllers go beyond simple user input functions and provide feedback to the user through vibration. In addition, user input through gestures can also be performed by detecting the movement of the user's hand (or arm) other than the user's direct manipulation of buttons or wheels.

Additionally, different gestures and feedback are performed depending on the content being used, and the method of recognizing gestures is different depending on the type of XR device, so there is a problem of having to use different controllers depending on the situation.

Accordingly, the purpose of the present invention is to provide a portable controller whose functions can be easily expanded and changed.

A basic controller including a handle portion; and an expansion module detachable from the basic controller, wherein the basic controller includes: a handle portion that extends in the longitudinal direction and is held by a user's hand; An operating body located in front of the handle portion; a user input unit located on the operation body; a first connector formed on the operating body; and a first coupling rail formed on the manipulation body, wherein the expansion module includes a module body including a coupling portion in contact with the manipulation body; a second connector formed in the coupling portion and coupled to the first connector; And it provides a portable controller including a second coupling rail that is slide fastened to the longitudinal direction of the first coupling rail.

The first connector is located in the front of the manipulation body, the first coupling rail is located in the left and right directions of the manipulation body, and the coupling portion of the expansion module may have a U-shape surrounding the front and left and right sides of the manipulation body. there is.

The second connector protrudes and can be inserted into the first connector.

The first coupling rail may include a groove that is wide at the front and narrows toward the rear, and the second coupling rail may have a bar shape that is thin at the rear and thick at the front.

The expansion module may include a locking hook formed on the coupling portion, and the basic controller may include a locking protrusion to which the locking hook is coupled.

The locking hook is formed at one end of a hook lever rotatably coupled to the module body, and includes a unlocking button coupled to the other side of the hook lever. When the unlocking button is operated, the hook lever rotates and the The locking hook may be separated from the locking protrusion.

The locking protrusion includes an inclined surface extending from front to rear; And it may include a locking part that is bent on an inclined plane and catches the hook.

The locking hook includes a hook surface in contact with the catching portion, and a line extending from the rotation center of the hook lever to the hook surface may be perpendicular to the hook surface.

It includes a locking hole formed in the basic controller, and the locking protrusion may be located on one side of the locking hole.

The locking protrusion may be located at a lower portion of the second connector.

The upper surface of the manipulation body and the upper surface of the module body may be parallel.

It is located on the upper surface of the module body and further includes a second user input unit, and the first user input unit and the second user input unit may be located within a movable range of the user's thumb.

The basic controller may be left-right symmetrical.

The expansion module includes a ring case connected to both sides of the module body; And it may include a plurality of infrared LEDs (IR LEDs) mounted along the outer surface of the ring case.

The ring case is located at the bottom of the module body, and an outer surface of the ring case may be inclined toward the front.

The angle formed between the upper surface of the operating body and the front surface of the ring case may be tilted toward the rearward direction than 90°.

According to at least one embodiment of the present invention, the portable controller can expand and change functions by easily attaching and detaching an expansion module.

The effects that can be obtained from the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description below. will be.

1 is a perspective view showing a portable controller according to one aspect of the present invention.

Figure 2 is a diagram showing a basic controller and an expansion module of a portable controller according to one aspect of the present invention.

Figure 3 is an exploded perspective view showing the basic controller of a portable controller according to one aspect of the present invention.

Figure 4 is an exploded perspective view of an expansion module of a portable controller according to one aspect of the present invention.

Figure 5 is a side view showing an operating body of a portable controller according to one aspect of the present invention.

Figure 6 is a plan view showing the operation body and module body of the portable controller according to one aspect of the present invention.

Figure 7 is a diagram showing a connection part and a locking part of a portable controller according to one aspect of the present invention.

Figure 8 is a diagram showing a coupling rail of a portable controller according to one aspect of the present invention.

Figure 9 is a diagram showing a method of fastening a coupling rail of a portable controller according to an aspect of the present invention.

Figure 10 is a diagram showing a locking method of the basic controller and expansion module of the portable controller according to one aspect of the present invention.

Figure 11 is a diagram illustrating a method of unlocking the basic controller and expansion module of a portable controller according to one aspect of the present invention.

Hereinafter, embodiments disclosed in the present specification will be described in detail with reference to the attached drawings. However, identical or similar components will be assigned the same reference numbers regardless of reference numerals, and duplicate descriptions thereof will be omitted. The suffixes “module” and “part” for components used in the following description are given or used interchangeably only for the ease of preparing the specification, and do not have distinct meanings or roles in themselves. Additionally, in describing the embodiments disclosed in this specification, if it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed in this specification, the detailed descriptions will be omitted. In addition, the attached drawings are only for easy understanding of the embodiments disclosed in this specification, and the technical idea disclosed in this specification is not limited by the attached drawings, and all changes included in the spirit and technical scope of the present invention are not limited. , should be understood to include equivalents or substitutes.

Terms containing ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

When a component is said to be "connected" or "connected" to another component, it is understood that it may be directly connected to or connected to the other component, but that other components may exist in between. It should be. On the other hand, when it is mentioned that a component is “directly connected” or “directly connected” to another component, it should be understood that there are no other components in between.

Singular expressions include plural expressions unless the context clearly dictates otherwise.

In this application, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

FIG. 1 is a perspective view showing a portable controller 10 according to an aspect of the present invention, and FIG. 2 is a diagram showing a basic controller and an expansion module of the portable controller according to an aspect of the present invention.

XR technology may include XR devices that provide images to provide images graphically. XR devices can use a screen located in front of or around the user, and as a representative XR device, devices worn directly on the head, such as a head mounted display (HMD), can be used.

XR devices require a portable controller 10 that the user can hold and operate in order to input commands when using the device while moving as if the user were actually experiencing it.

The controller 10 of the present invention may include a handle 102 that is wrapped and grasped by hand, and an operating body 101 located in front of the handle 102. The handle part 102 can be wrapped with the lower palm of the thumb, middle finger, ring finger, and little finger, and the button located on the operating body 101 can be operated using the index finger and thumb.

Use your thumb to operate the function key 123 and the trackball 121 or jog stick 122 located at the top of the operating body 101, and use your index finger to operate the trigger button located in front of the operating body 101. (125) can be manipulated.

Basically, a pair of

controllers

10a and 10b can be configured as a set so that the user can hold and use them in his left and right hands, respectively. A pair of

controllers

10a and 10b may have the same buttons, but may be configured to enable various operations through different buttons.

For example, according to the embodiment shown in FIG. 1, the left side may include

input units

121, 122, 123, and 125 in the form of a jogstick 122, and the right side may include an input unit in the form of a trackball 121. The jogstick 122 is advantageous for two-dimensional movement manipulation, and the trackball 121 can be used for rotation and gaze movement.

Depending on the application being used, the number of portable controllers 10 required may vary. If the operation is a simple application, it can be controlled with just one basic controller 100, but if various controls are required, it may be operated by holding it with both hands.

When using an application that searches space by moving the gaze, both the jogstick 122 and the trackball 121 are required, so the user must hold the

portable controllers

10a and 10b in both hands. In this way, one or two of the pair of controllers (10a, 10b) can be used depending on the situation.

The portable controller 10 can go beyond simply manipulating a cursor or pointer on the screen to detect a user's gesture and recognize it as a user input.

The user's gesture style may vary depending on the content of the application being used. For example, when using a sports application, the user's movements can be detected through the portable controller 10. The functions required for the portable controller 10 may vary depending on how the XR device detects the user's gesture and the sensor location of the XR device.

Conventionally, a position sensor such as a gyro sensor of the portable controller 10 itself was used to detect the user's movement (gesture) based on a change in the position of the portable controller 10.

However, in the case of XR applications, there is a need to detect more precise user movements. In order to detect not only large gestures such as arm movements, but also small gestures such as wrist bending and wrist rotation, a method of externally tracking the movement of the controller 100 can be used.

In addition, in addition to receiving user commands through the portable controller 10, it can function as an output unit that provides tactile, a sense beyond sight and hearing, to the user.

The sense of touch provides not only a tremor that vibrates in one direction, but also other sensations depending on the direction, speed, and size of the vibration. The actuator 141, which provides a rich sense of touch, requires a plurality of actuators to provide various types of sensation.

However, in order to provide various input and output functions as described above, the problem arises that the size of the portable controller 10 increases.

Accordingly, the portable controller 10 of the present invention can be composed of the basic controller 100 and an expansion module 200 that is detachable from the basic controller 100, as shown in FIG. 2.

Basic functions can be used only with the basic controller 100, but an expansion module 200 equipped with specialized functions can be added to the basic controller 100 for more accurate control and to provide various senses.

The expansion module 200 has a form that can be inserted from the front of the basic controller 100, as shown in FIG. 2. It extends toward the rear of the operating body 101 and can be coupled to the front of the operating body 101 so as not to interfere with the handle portion 102.

In the combined state as shown in Figure 1, the functions mounted on the expansion module 200 can be additionally utilized. The expansion module 200 of this embodiment includes a ring case 220 (LED marking) in which an LED marker 224 capable of tracking the user's gesture is arranged.

The expansion module 200 includes a module body 210 including a U-shaped coupling portion 240 surrounding the front and side surfaces of the manipulation body 101. Modules for additional functions may be mounted inside the module body 210, and for example, additional buttons may be mounted as shown in FIG. 3. The module body 210 may have various shapes depending on the function of the expansion module 200.

A coupling rail is provided so that the basic controller 100 and the expansion module 200 can be stably coupled, and the expansion module 200 and the basic controller 100 are electrically connected to utilize the functions of the expansion module 200. A second connector 233 may be provided. The connector and coupling rail may be located around the side surface of the operating body 101 where the basic controller 100 and the expansion module 200 are in contact and at the coupling portion 240 of the expansion module 200.

Figure 3 is an exploded perspective view showing the basic controller 100 of the portable controller 10 according to one aspect of the present invention.

The basic controller 100 includes

cases

111, 112, 113, 114, and 115 that constitute the exterior, and the case may be separately configured with a handle portion 102 and an operating body 101, but in this embodiment, the upper and lower The assembly of parts can be secured through the

cases

111 and 112 that are coupled in one direction.

In the operation body 101, a trigger button 125, function keys, and a trackball 121 are mounted on the main board 131. The handle portion 102 may include a battery 139 and a basic actuator 141 that transmits vibration, is mounted on the auxiliary board 132, and is connected to the main board 131 to sense user input.

The

cases

111, 112, 113, and 114 are manufactured by injection molding for ease of manufacturing, but may be equipped with a partially rigid middle frame 115 for durability. The middle frame 115 is located below the main board 131 of the operation body 101 and can support the back of the input unit when the input unit is pressed. The trigger button 125 is also combined with the middle frame 115, and the frame can support the force of the trigger button 125 by pressing the button in the direction of the frame.

A top cover 112 having an opening may be coupled to the upper surface of the manipulation body 101 to expose the user input unit. The lower part of the handle portion 102 may further include a bottom cover 114 made of another material to improve grip. The top cover 112 and bottom cover 114 may be omitted.

The basic controller 100 can be configured left and right symmetrically so that it can be used without distinction between left and right hands. When using a pair of basic controllers (100), the basic controller (100) equipped with a trackball (121) and a jog stick (122) can be used as the basic controller (100), and since it is symmetrical, the left and right sides can be freely controlled by the user. You can change it by setting it.

Figure 4 is an exploded perspective view of the expansion module 200 of the portable controller 10 according to one aspect of the present invention.

The module body 210 of this embodiment may be composed of a lower case 213, a middle frame 215, and an upper cover 211.

It includes ring cases (221, 222) extending from the left and right sides of the module body (210), and the ring cases (221, 222) may be configured as one piece with the module body (210), and are fastened to the module body (210). It can also be configured in the form

In this embodiment, the lower case 213 of the module body 210 and the inner case 221 of the ring case are integrated, and the outer cover 222 surrounding the outer surface of the ring case is coupled to the inner case 221. It can be configured in the form

An LED lamp 224 (LED marker) is mounted between the inner case 221 and the outer cover 222, and a pair of LED lamps 224 can be provided on both left and right sides toward the outside of the

ring case

221 and 222. there is. The LED lamp 224 may be connected through the flexible substrate 223. The outer cover 222 may include a light-transmitting material that can pass infrared rays.

The XR device is equipped with a sensor that detects the movement of the LED marker 224 mounted on the

ring case

221 and 222, and can detect the user's gesture by tracking the movement of the LED marker 224.

The LED marking 220 shown in FIG. 1 can detect movement through a camera located in the front, and when tracking the LED marker 224 on a head-mounted display worn on the user's head, the LED marker 224 The arrangement of the LED marking 220 should be changed so that it faces the user's face.

In this embodiment, the LED marker 224 is arranged along the outer surface of the

ring cases

221 and 222, so that the LED marker 224 located at the rear can also be recognized by the camera located at the front. ) may have a curved shape with the outer surface facing slightly forward. That is, the hole size at the front of the

ring cases

221 and 222 may be smaller than the size of the hole at the rear.

The module body 210 may be additionally provided with an expansion button 234, and a module board 231 on which the expansion button 234 is mounted may be mounted on the module body 210. The module board 231 is connected to the LED marker 224 and may further include a second connector 233 to transmit the functions mounted on the expansion module 200 to the basic controller 100. Through the second connector 233, the control unit of the basic controller 100 can control the LED marker 224 and receive input from the expansion button to control the XR controller.

Figure 5 is a side view showing the operation body 101 of the portable controller 10 according to one aspect of the present invention. For better grip, the handle portion 102 has a cylindrical shape with a diameter of 30 to 40 mm and may become thinner toward the lower end.

The average adult finger size is the sum of the widths of the middle ring finger and little finger of about 62.8 mm, so taking this into consideration, the length of the handle portion 102 can be configured to be 71 mm.

The angle of the handle portion 102 can be configured to be bent at about 35° with the upper surface of the operating body 101. The upper surface angle of the handle and the operating body 101 can be determined by considering the manipulability of the thumb.

The front-to-back length of the manipulation body 101 can be determined by considering an appropriate index finger position for manipulating the trigger button 125 located at the front lower portion of the manipulation body 101.

Figure 6 is a plan view showing the operation body 101 and the module body 210 of the portable controller 10 according to one aspect of the present invention.

The user can control the function key 123 and the jog stick 122 (trackball 121) located on the upper surface of the operating body 101 as well as the expansion button 234 located on the expansion module 200 with the thumb. The

user input units

121, 122, 123, and 234 can be arranged in consideration of the thumb's range of motion (30°).

Figure 7 is a diagram showing a coupling rail of the portable controller 10 according to an aspect of the present invention, Figure 6 (a) is a first coupling rail 116 of the basic controller 100, Figure 6 (b) is the second coupling rail 216 of the expansion module 200. The first coupling rail 116 may have a concave shape and the second coupling rail 216 may have a protruding shape.

Since there should be no inconvenience when using only the basic controller 100, the basic controller 100 includes a concave structure rather than a protruding structure, and in particular, the coupling portion 240 of the expansion module 200 has a U-shape. , the risk of damage to the protruding joint structure is low.

The first coupling rail 116 may have a groove shape and the second coupling rail 216 may have a bar shape. The groove of the first coupling rail 116 may become narrower toward the rear, and the second coupling rail 216 may also have a shape where the rear is thinner than the front. The second coupling rail 216 may be configured to have a curved surface at the rear to facilitate coupling to the first coupling rail 116.

Figure 8 is a diagram showing a method of fastening the coupling rail of the portable controller 10 according to one aspect of the present invention. The left side is rear and the right side is front, and the diagram shows only the second coupling rail 216 of the expansion module 200 based on the basic controller 100.

The rear of the second coupling rail 216 is inserted into the front of the first coupling rail 116, and initially there is a large gap between the first coupling rail 116 and the second coupling rail 216 (gap1, (a)) ) When the coupling is completed, the gap between the first coupling rail 116 and the second coupling rail 216 disappears (gap2=0), and the expansion module 200 can be completely coupled to the basic controller 100.

FIG. 9 is a diagram illustrating the

connectors

133 and 233 and the locking portion 260 of the portable controller 10 according to one aspect of the present invention. (a) is a front view of the basic controller 100 and (b) is a rear view of the expansion module 200.

A first connector 133 and a locking hole 117 are located on the front of the basic controller 100, and the above-described first coupling rails 116 are located on the left and right sides. The coupling portion 240 of the expansion module 200 has second coupling rails 216 located on the left and right, and a second connector 233 and a locking hook 2611 protrude from the U-shaped inner end.

Like the second coupling rail 216, the connector (second connector 233) and the locking structure (locking hook 2611) of the expansion module 200 have a protruding shape, and the connector (first connector 233) of the basic controller 100 has a protruding shape. The connector 133) and the locking structure (locking protrusion 1172 located in the lock hole 117) may have a shape that is recessed inward rather than protruding.

As shown in FIG. 3, the protruding second connector 233 of the expansion module is inserted into the first connector 133 of the basic controller 100, and the expansion module 200 and the basic controller 100 can be electrically connected. there is.

The coupling is completed when the front of the basic controller 100 and the inner surface of the coupling portion 240 of the expansion module 200 contact each other. The coupling rail assists the coupling of the expansion module 200 and the basic controller 100, but since the portable controller 10 moves while held by the user, it can be equipped with a locking device to ensure stable coupling.

The locking device of the present invention may include a locking hook 2611 protruding from the expansion module 200 and a locking protrusion 1172 of the basic controller 100.

FIG. 10 is a diagram illustrating a locking method of the basic controller 100 and the expansion module 200 of the portable controller 10 according to one aspect of the present invention. The locking hook 2611 of the present invention is formed on one side of the hook lever 261 rotatably coupled to the module body 210 and protrudes from the module body 210.

When the basic controller 100 is inserted into the coupling portion 240 of the expansion module 200 along the coupling rails 116 and 216, the end of the locking hook 2611 and the inclined surface 1174 formed in front of the basic coupling protrusion come into contact with each other. all. When the locking hook 2611 moves along the inclined surface 1174 of the engaging protrusion, the horizontal position changes (moves to the right in the drawing), so the hook lever 261 rotates and the horizontal position of the locking hook 2611 changes. It may vary.

When the locking hook 2611 reaches the end of the inclined surface 1174, the locking hook 2611 is inserted into the locking protrusion 1172 as shown in (b) of FIG. 9, and the basic controller 100 and the expansion module 200 ) can be concluded.

The locking protrusion 1172 includes a locking portion 1173 that is bent from the inclined surface 1174 and located on the opposite side of the inclined surface 1174, and the locking hook 2611 has a hook surface 2612 in contact with the locking portion 1173. It can be included.

The hook surface 2612 is configured to be perpendicular to the line extending from the rotation axis 2615 of the hook lever 261 to the hook surface 2612, thereby preventing the locking hook 2611 from being separated from the locking protrusion 1172.

The locking protrusion 1172 may be formed on the side of the locking hole 117 formed in front of the basic controller 100, and the locking protrusion 1172 may be formed on both the left and right sides of the locking hole 117. The basic controller 100 can be used without distinction between left and right, and both the left-facing expansion module 200 and the right-facing expansion module 200 can be combined.

FIG. 11 is a diagram illustrating a method of unlocking the basic controller 100 and the expansion module 200 of the portable controller 10 according to one aspect of the present invention. The other side 2613 of the hook lever 261 is connected to the unlock button 265.

The unlock button 265 operates in a slide manner, and the hook lever 261 rotates around the rotation axis 2615 according to the slide direction, and the position of the locking hook 2611 located on one side of the hook lever 261 changes. can do.

The unlock button 265 is located in the front of the expansion module 200, and the hook lever 261 is disposed in the front and rear directions of the module body 210 of the expansion module 200. In the locked state as shown in Figure 10 (b), when the user slides the unlock button 265 in Figure 11 (a), the hook lever 261 rotates as shown in Figure 11 (b) and the lock hook 2611 ) can be released from the locking protrusion (1172).

As discussed above, according to at least one embodiment of the present invention, the function can be expanded and changed by easily attaching and detaching an expansion module to the portable controller 10.

The above detailed description should not be construed as restrictive in any respect and should be considered illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention.

Claims

A basic controller including a handle portion; and

Includes an expansion module detachable from the basic controller,

The basic controller is

The handle extends in the longitudinal direction and is gripped by the user's hand;

An operating body located in front of the handle portion;

a first user input unit located on the operation body;

a first connector formed on the operating body; and

It includes a first coupling rail formed on the operating body,

The expansion module is,

a module body including a coupling portion in contact with the manipulation body;

a second connector formed in the coupling portion and coupled to the first connector; and

A portable controller including a second coupling rail that is slide-fastened in the longitudinal direction of the first coupling rail.
According to paragraph 1,

The first connector is located in the front of the manipulation body,

The first coupling rail is located in the left and right directions of the operating body,

A portable controller, characterized in that the coupling portion of the expansion module has a U-shape surrounding the front and left and right sides of the operation body.
According to paragraph 2,

The second connector protrudes and is inserted into the first connector.
According to paragraph 1,

The first coupling rail includes a groove that is wide at the front and narrows toward the rear,

The second coupling rail is a portable controller characterized in that it has a bar shape with a thin rear end and a thick front end.
According to paragraph 1,

The expansion module includes a locking hook formed on the coupling portion,

The basic controller is a portable controller characterized in that it includes a locking protrusion to which the lock hook is coupled.
According to clause 5,

The locking hook is formed at one end of a hook lever rotatably coupled to the module body,

It includes a lock release button coupled to the other side of the hook lever,

A portable controller, wherein when the unlock button is operated, the hook lever rotates and the lock hook is separated from the lock protrusion.
According to clause 6,

The locking protrusion is

a slope extending from front to rear;

A portable controller comprising a locking portion that is bent on the inclined plane and catches the hook.
In clause 7,

The locking hook includes a hook surface in contact with the catching portion,

A portable controller, characterized in that a line extending from the rotation center of the hook lever to the hook surface is perpendicular to the hook surface.
According to clause 5,

Includes a locking hole formed in the basic controller,

A portable controller, characterized in that the locking protrusion is located on one side of the locking hole.
According to clause 5,

A portable controller, characterized in that the locking protrusion is located below the second connector.
According to paragraph 1,

A portable controller, wherein the upper surface of the manipulation body and the upper surface of the module body are parallel.
According to paragraph 1,

It is located on the upper surface of the module body and further includes a second user input unit,

A portable controller, wherein the first user input unit and the second user input unit are located within a range of motion of the user's thumb.
According to paragraph 1,

A portable controller, characterized in that the basic controller is left and right symmetrical.
According to paragraph 1,

The expansion module is

a ring case connected to both sides of the module body; and

A portable controller comprising a plurality of infrared LEDs mounted along the outer surface of the ring case.
According to clause 14,

The ring case is located at the bottom of the module body,

A portable controller, characterized in that the outer surface of the ring case is inclined toward the front.
According to clause 14,

A portable controller, wherein the angle formed between the upper surface of the operating body and the front surface of the ring case is inclined toward the rearward direction than 90°.