KR102399007B1 - Gimbal device for mobile device - Google Patents

Abstract

The present invention relates to a gimbal device, and in particular, a handle portion; a gimbal part supported by the front end of the handle part; including, wherein the gimbal part comprises: a holding part on which a camera-mounted mobile terminal is mounted; a first shaft, a second shaft, and a third shaft provided between the front end of the handle and the mounting unit, the mounting unit rotatably provided in pitch, roll, and yaw directions, respectively; a first detection sensor for detecting the movement of the mounting part; a first motor, a second motor, and a third motor respectively provided corresponding to the first to third axes and rotating the respective axes; and a control unit configured to control the first motor, the second motor and the third motor so that the mounting unit returns to an initial setting position based on the movement of the mounting unit detected by the first detection sensor.
Thereby, by canceling the vibration applied to the mobile terminal, more stable and clear shooting is possible, and image quality compared to commercial high-end gimbal devices can be obtained at a relatively low cost.

Description

Gimbal device for mobile terminal

The present invention relates to a gimbal device, and in particular, for a mobile terminal capable of canceling vibrations applied to the mobile terminal to enable more stable and clear shooting, as well as obtaining image quality comparable to that of a commercial high-spec gimbal device at a relatively low cost It is about the gimbal device.

BACKGROUND ART Portable electronic devices including an image capturing function, such as a smart phone and an action cam, are popular.

The image capturing device of these portable electronic devices, that is, the camera module, is getting smaller in size and improving its performance in accordance with the trend of miniaturization. to experience

In order to prevent image quality deterioration due to such shaking, in the case of action cams, companies that supply them also supply additional items that can be fixed to the body or bag of the photographer, and expensive cameras used for broadcasting. In the case of , these shake compensators are generally very heavy, bulky, and expensive, so it is difficult for general consumers to access them.

In particular, with the recent growth of the one-person media market such as YouTube, the trend of many ordinary people making videos is increasing, so it is possible to obtain inexpensive and reliable images so that they can be applied to popular shooting devices such as smartphones. There is an urgent need for a gimbal device for a portable terminal.

Unexamined Patent Publication No. 10-2019-0069801

Accordingly, it is an object of the present invention to provide a gimbal device for a mobile terminal capable of more stable and clear photography by canceling vibration applied to the mobile terminal and keeping the camera horizontal.

In addition, another object of the present invention is to minimize the cost by manufacturing the handle part or the shaft by a three-dimensional printing method using ABS resin, while guaranteeing the mechanical strength required for using the gimbal device, so that it is possible to obtain a high specification for commercial use at a relatively low cost. An object of the present invention is to provide a gimbal device for a portable terminal capable of obtaining image quality comparable to that of a gimbal device.

In addition, another object of the present invention is to provide the first to third shafts in an “L” shape, so that they are stacked on top of each other in an unused state for easy storage, and the weight of the gimbal part while the mobile terminal is mounted during use An object of the present invention is to provide a gimbal device for a portable terminal capable of maximizing user convenience by locating the center of gravity.

The above object, according to an embodiment of the present invention, a handle portion; a gimbal part supported on the tip of the handle part; including, wherein the gimbal part includes a holding part on which a camera-mounted mobile terminal is mounted; a first shaft, a second shaft, and a third shaft provided between the front end of the handle and the mounting portion, the mounting portion being rotatably provided in pitch, roll, and yaw directions, respectively; a first detection sensor for detecting the movement of the mounting part; a first motor, a second motor, and a third motor respectively provided corresponding to the first to third axes and rotating the respective axes; A gimbal device for a portable terminal comprising a; a control unit for controlling the first motor, the second motor and the third motor so that the mounting unit returns to an initial setting position based on the movement of the mounting unit detected by the first detection sensor achieved by

Here, provided in the handle portion, an operation switch for turning on / off the operation of the gimbal portion, the first motor, the first motor to set the initial setting positions of the first axis, the second axis and the third axis It may further include an axis setting switch for operating the second motor and the third motor.

Here, it further includes a second detection sensor provided at the tip of the handle, wherein the control unit is the mounting position detected by the first detection sensor based on the initial setting position of the first axis detected by the second detection sensor It can be controlled by receiving the negative movement as an input.

Meanwhile, the first axis, the second axis, and the third axis may be provided in an 'L' shape.

Meanwhile, the first axis, the second axis, and the third axis are made of an ABS resin (Acrylonitrile-Butadiene-Styrene copolymer), and may be manufactured using a 3D printer.

Accordingly, in the gimbal device for a mobile terminal according to the present invention, more stable and clear shooting is possible by canceling the vibration applied to the mobile terminal and keeping the camera horizontal.

In addition, the gimbal device for a mobile terminal according to the present invention minimizes the cost by manufacturing the handle part or the shaft by a three-dimensional printing method using ABS resin, while ensuring the mechanical strength required for using the gimbal device, which is relatively low cost image quality compared to commercial high-end gimbal devices can be obtained.

In addition, in the gimbal device for a mobile terminal according to the present invention, by providing the first to third axes in an “L” shape, they are stacked on top of each other in an unused state for easy storage, and when the mobile terminal is mounted during use, The center of gravity of the gimbal part is positioned in the center, which has the advantage of maximizing user convenience.

1 is a perspective view of a gimbal device for a mobile terminal according to an embodiment of the present invention;
2 is an enlarged perspective view of the gimbal unit shown in FIG. 1;
3 is a perspective view from another direction of the gimbal device for a mobile terminal shown in FIG. 1;
4 is a perspective view showing various axial positions of the gimbal unit shown in FIG. 1;
5 is a block diagram of a gimbal device for a mobile terminal according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, this is not intended to limit the present disclosure to specific embodiments, and should be construed as including various modifications, equivalents, and/or substitutions of the embodiments of the present disclosure. In connection with the description of the drawings, like reference numerals may be used for like components.

In this document, expressions such as 'have', 'may have', 'include' or 'may include' are the presence of a corresponding characteristic (eg, a numerical value, function, operation, or component such as a part). and does not exclude the presence of additional features.

Expressions such as 'first', 'second', 'third', etc. used in this embodiment may modify various components regardless of order and/or importance, and do not limit the components. The above expressions may be used to distinguish one component from another.

In the present specification, a 'mobile terminal' includes, for example, various portable electronic devices such as a smartphone, a tablet personal computer, a mobile phone, a small camera, an electronic bracelet, and a smart watch. do.

Hereinafter, the embodiment will be described in detail.

1 and 5 , a gimbal device 1 for a mobile terminal according to an embodiment of the present invention includes a handle portion 10 and a gimbal portion 30, wherein the gimbal portion 30 includes: Mount 31, first shaft 321, second shaft 322 and third shaft 323, first detection sensor 351, first to third motors 331, 332, 333 ) and a control unit 37 .

Each configuration will be described.

The handle unit 10 is provided so that a user can grip it, and is provided to support the gimbal unit 30 at the tip so that an image can be captured through the mobile terminal 100 .

As shown in Figures 1 to 3, the handle portion 10 is provided in a shape similar to a conventional umbrella handle or selfie stick, and the detailed shape or length or size can be variously changed as needed.

An operation switch 11 and an axis setting switch 13 may be provided in the handle portion 10 .

The operation switch 11 is provided to turn on/off the operation of the gimbal unit 30 .

A power supply unit 39 for supplying power to each component of the gimbal unit 30 is provided inside the handle unit 10, and the operation switch 11 turns on/off power from the power unit 39 to the gimbal unit 30. turn off

The power supply unit 39 may be provided in various types, may be provided to allow charging through connection with an external power source, or may be provided to be able to exchange the power supply unit 39 itself. Here, a separate display unit (not shown) may be further provided so that the amount of power of the power supply unit 39 can be checked from the outside.

The axis setting switch 13 is provided to operate the first to third motors 331 , 332 , 333 in order to set the initial setting positions of the first to third shafts 321 , 322 , 323 .

That is, when the mobile terminal 100, such as a smartphone, is mounted on the mount 31, the axis is set so that the shooting direction of the camera can be set in various directions (refer to FIGS. 1, 2, 4), such as forward, backward, or upward. An initial setting position can be determined through the switch 13 .

The axis setting switch 13 may be provided in various types, for example, as shown in FIG. 3 , may be provided in a shape such as a joystick.

Alternatively, the axis setting switch 13 may be provided in three corresponding to each axis (321, 322, 323) of course.

On the other hand, a connection part 20 may be additionally provided between the handle part 10 and the gimbal part 30 , and the connection part 20 is provided to enable length adjustment between the handle part 10 and the gimbal part 30 . It may be provided to adjust the distance of.

The gimbal unit 30 is configured according to the shooting situation of the mobile terminal 100 mounted on the mounting unit 31 (eg, a situation in which movement such as vibration occurs, such as when a photographer walks or runs, or takes a picture in a vehicle). It is provided to correct the vibration (movement) applied to the mobile terminal 100 .

Each configuration of the gimbal unit 30 will be described in turn as follows.

The cradle 31 mounts the mobile terminal 100 on which the camera is mounted.

The mounting unit 31 is provided in various shapes and sizes depending on the type of the portable terminal 100 to be mounted. For example, when the portable terminal 100 is provided as a smartphone, it has the shape shown in FIG. 2 . can be provided. In this case, of course, various fixing methods can be used without limitation, such as a conventional selfie stick.

The first to third shafts 321 , 322 , 323 are provided between the front end of the handle portion 10 and the mounting portion 31 , and the mounting portion 31 is provided with a pitch, a roll, and a yaw, respectively. (yaw) is provided to be rotatable in the direction.

For example, in FIG. 4 , the first shaft 321 is provided rotatably in the pitch direction, the second shaft 322 is in the roll direction, and the third shaft 323 is rotatable in the yaw direction.

However, the configuration of the shafts 321 , 322 , 323 of the present invention is not limited to the above embodiment, and the shape of the shaft responsible for each pitch, roll, and yaw may be provided in various ways, and the installation order is also freely can be changed.

However, it is preferable that the first to third shafts 321 , 322 , and 323 are provided in a shape in which the rotation radii of the motors 331 , 332 , 333 mounted on each shaft do not interfere with each other.

Meanwhile, the first to third shafts 321 , 322 , and 323 may be provided in various shapes, and they are all similar (the size or detailed shape may be different, but the overall shape is a bar or a curve). same) may be provided, or may be provided in different shapes, respectively.

For example, as shown in FIG. 1 , the first to third axes 321 , 322 , and 323 may be provided in an “L” shape. In this case, as shown in FIG. 2 , in the state in which the mobile terminal 100 is mounted, the approximate center of gravity of the gimbal unit 30 is located at the center, so that the user can use the gimbal device 1 through the handle unit 10 . ) It is easy to support the whole, and it has the advantage of being easy to support on a separate support.

The above-described handle portion 10 and shaft (321, 322, 323) may be provided with a variety of materials, for example, any one or both of the ABS resin (Acrylonitrile-Butadiene-Styrene copolymer) can be provided there is.

ABS resin has the advantages of relatively low material cost, relatively good chemical and thermal stability, excellent toughness and strength within a limited load range, and excellent impact resistance and strength even when molded at low temperatures. In addition, there is an advantage that it can be applied to manufacturing using a 3D printer.

Therefore, the gimbal device for a mobile terminal according to the present invention uses ABS resin for the handle part or the shaft, and minimizes the cost by manufacturing the 3D printing method, while guaranteeing the mechanical strength required for using the gimbal device, which is relatively inexpensive. Image quality comparable to commercial high-end gimbal devices can be obtained at a cost.

The first detection sensor 351 detects the movement of the mounting unit 31 .

The first detection sensor 351 may be installed at various positions as needed, for example, may be provided inside the mounting unit 31 , or of the first shaft 321 connected to the mounting unit 31 . It may be provided at the end.

The first detection sensor 351 may be provided in various types, for example, may be provided as an Inertial Measurement Unit (IMU).

The inertial measurement device generally includes a three-axis accelerometer and a three-axis gyroscope, and various known types may be used without limitation.

The 3-axis gyro sensor of the inertial measurement device measures the inclination angles of the roll, pitch, and yaw of the mounting unit 31 . This means, as shown in FIG. 1, that the roll is inclined to the left and right, the pitch is inclined forward and backward, and the yaw is inclined in the Z-axis direction (rotation angle). In particular, the roll and the pitch are in the direction of gravity It indicates how tilted it is relative to . On the other hand, the 3D acceleration sensor indicates how quickly the movement (vibration or vibration) in each direction is made.

The second detection sensor 352 may be provided at the tip of the handle unit 10 .

The second detection sensor 352 includes the cradle 31 detected by the first detection sensor 351 based on the set position of the first shaft 321 detected by the control unit 37 by the second detection sensor 352 . ) can be input and controlled.

The second detection sensor 352 may be provided in various types, and may be provided in the same type as the first detection sensor 351 or may be provided in a different type.

The first to third motors 331 , 332 , and 333 are provided to correspond to the first to third shafts 321 , 322 , 323 , respectively, and rotate the respective shafts 321 , 322 , 323 .

The motors 331 , 332 , and 333 may be provided in various types, for example, a brushless direct current motor (BLDS) may be provided. In this case, since there is no brush, a spark does not occur and gas explosion The advantage is that there is no risk of

The control unit 37 includes the first to third motors 331 , 332 , 333 so that the mounting unit 31 returns to an initial setting position based on the movement of the mounting unit 31 detected by the first detection sensor 351 . to control

The control unit 37 detects the vibration detected by the mounting unit 31 by the first detection sensor 351 and transmits the vibration to the motors 331 , 332 , 333 corresponding to the corresponding shafts 321 , 322 , 323 . control to move in the right direction.

The control unit 37 can be controlled by various control methods, for example, a proportional-integral-differential control method (PID: Proportional-Integral-Differential) control method can be used.

The PID control method is a method of measuring an output to be controlled, comparing it with a desired setpoint, calculating an error, and calculating a control value required for control using this error value.

The control unit 37 may be provided in various types, for example, a board type in which a motor driver for controlling the motors 331 , 332 , 333 corresponding to the respective axes 321 , 322 , 323 is built-in. The main board (BGC: Brushless Gimbal Controller) may be provided.

The control unit 37 may be provided in various positions, for example, may be mounted on the inside of the handle unit (10).

The operation process of the gimbal device 1 for a mobile terminal described above will be described as follows.

First, as shown in FIG. 2 , the mobile terminal 100 is mounted on the cradle 31 .

After the mobile terminal 100 is mounted, the operation switch 11 of the handle unit 10 is operated to turn on the gimbal unit 30, and the first to third axes 321 through the axis setting switch 13, Adjust the positions 322 and 323 to the initial setting position so that the desired shooting direction is obtained. The order of mounting the portable terminal 100 and the initial setting position may be interchanged.

In this case, the control unit 37 may measure the rotation angles of the first to third motors 331 , 332 , 333 and store the initial setting position as initial information. At this time, the control unit 37 operates the operation switch 11 to store the rotational positions of the first to third motors 331, 332, 333 at the time when the gimbal unit 30 is operated as the starting position, The initial setting position may be determined by reflecting the rotation angles of the first to third motors 331 , 332 , 333 operated through the axis setting switch 13 from the starting position.

Thereafter, when the user starts shooting through the camera of the portable terminal 100 and a movement (vibration or vibration, etc.) occurs in the portable terminal 100 during shooting, the first detection sensor 351 is mounted on the mounting unit 31 . senses the degree of inclination and acceleration in the three axial directions (pitch, roll, yaw) of The first to third motors 331 , 332 , and 333 are operated by calculating the rotation directions and rotation angles of the first to third motors 331 , 332 , and 333 .

Accordingly, the gimbal device for a mobile terminal according to the present invention has the advantage that more stable and clear shooting is possible by canceling the vibration applied to the mobile terminal and keeping the camera horizontal.

1: Gimbal device for mobile terminal
10: handle part 11: operation switch
13: axis setting switch 20: connection part
30: gimbal part 31: holding part
321: 1st axis 322: 2nd axis
323: third axis 331: first motor
332: second motor 333: third motor
351: first detection sensor 352: second detection sensor
37: control unit 39: power unit
100: mobile terminal

Claims (5)

a handle part;
Including; a gimbal part supported on the tip of the handle part;
The gimbal unit,
a cradle on which a mobile terminal equipped with a camera is mounted;
a first shaft, a second shaft, and a third shaft provided between the front end of the handle and the mounting unit, the mounting unit rotatably provided in pitch, roll, and yaw directions, respectively;
a first detection sensor for detecting the movement of the mounting part;
a first motor, a second motor, and a third motor respectively provided corresponding to the first to third axes and rotating the respective axes;
It is provided in the handle part, and an operation switch for turning on/off the operation of the gimbal part, and the first motor, the second motor, and the a shaft setting switch for operating the third motor;
Containing; including a;
The first axis, the second axis, and the third axis are provided in an 'L' shape, and the mounting portion is a gimbal device for a mobile terminal that is provided to be rotatable with respect to the first axis. According to claim 1,
Further comprising a second detection sensor provided at the tip of the handle portion,
The control unit is a gimbal device for a mobile terminal that receives and controls the movement of the cradle detected by the first detection sensor based on the initial setting position of the first axis detected by the second detection sensor. According to claim 1,
The first axis, the second axis and the third axis are provided with an ABS resin (Acrylonitrile-Butadiene-Styrene copolymer), and a gimbal device for a mobile terminal manufactured using a three-dimensional printer. delete delete

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