CN219244527U - Magnetic device - Google Patents
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- CN219244527U CN219244527U CN202223403703.8U CN202223403703U CN219244527U CN 219244527 U CN219244527 U CN 219244527U CN 202223403703 U CN202223403703 U CN 202223403703U CN 219244527 U CN219244527 U CN 219244527U
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Abstract
The present utility model provides a magnetic device comprising: a first cover; the second cover body is assembled on the first cover body; the connecting piece is connected with the first cover body and the second cover body, so that an included angle is formed between the first cover body and the second cover body; a magnetic field sensor disposed in the first cover; the first magnetic piece is arranged in the connecting piece and generates a first magnetic field; and a second magnetic member disposed in the second cover body and generating a second magnetic field, wherein the magnetic field sensor senses the first magnetic field and the second magnetic field to determine a relative position between the first cover body and the second cover body.
Description
Technical Field
The present utility model relates to a magnetic device.
Background
In a conventional electronic device with an upper cover and a lower cover that are opened and closed, a related program is started or closed by detecting an opened or closed state of the upper cover and the lower cover, for example, detecting that the upper cover of a notebook computer is closed or opened, so as to correspondingly close or start a system.
On the other hand, the new flexible display technology allows a large-sized display to be integrated directly into the upper and lower covers. The flexible display can be correspondingly in a notebook computer mode or a tablet computer mode through different opening and closing angles between the upper cover and the lower cover. Therefore, by detecting the opening and closing angles of the upper cover and the lower cover and rapidly and accurately detecting whether the upper cover and the lower cover of the device are opened or closed, the device can be used for developing corresponding use programs, increasing the use situation modes of the electronic device and has great application value.
Disclosure of Invention
The present utility model provides a magnetic device for locating a first cover relative to a second cover in the device based on a measured magnetic field.
The magnetic device of the present utility model includes: a first cover; the second cover body is assembled on the first cover body; the connecting piece is connected with the first cover body and the second cover body, so that an included angle is formed between the first cover body and the second cover body; a magnetic field sensor disposed in the first cover; the first magnetic piece is arranged in the connecting piece and generates a first magnetic field; and a second magnetic member disposed in the second cover body and generating a second magnetic field, wherein the magnetic field sensor senses the first magnetic field and the second magnetic field to determine a relative position between the first cover body and the second cover body.
In an embodiment of the utility model, the magnetic field sensor is configured to sense a magnetic field component of the first magnetic field and the second magnetic field in a first direction and a magnetic field component of a third direction in the magnetic field sensor to determine the relative position between the first cover and the second cover, where the first direction is a direction perpendicular to a first surface of the first cover, the second direction is an extending direction of a first side of the first cover, and the third direction is located on the first surface of the first cover and perpendicular to the first direction and the second direction.
In an embodiment of the utility model, when the first surface of the first cover and the first surface of the second cover are parallel to each other, a direction of the first magnetic field of the first magnetic element is parallel to the first direction, and a direction of the second magnetic field of the second magnetic element is parallel to the first direction.
In an embodiment of the utility model, the direction of the first magnetic field of the first magnetic element is opposite to the direction of the second magnetic field of the second magnetic element.
In an embodiment of the present utility model, when the first surface of the first cover and the first surface of the second cover are parallel to each other, the magnetic field sensor detects that the magnetic field in the third direction is B X_min When the first surface of the first cover body and the first surface of the second cover body are perpendicular to each other, the magnetic field sensor detects that the magnetic field in the first direction is B Z_min When the included angle between the first surface of the first cover and the first surface of the second cover is θ, the magnetic field sensor detects that the magnetic field in the first direction is B Z The magnetic field sensor detects that the magnetic field in the third direction is B X The magnetic field angle theta detected by the magnetic field sensor B Is that
In an embodiment of the utility model, when the first surface of the first cover bodyWhen the magnetic field sensor detects that the magnetic field in the third direction is B when the magnetic field sensor is parallel to the first surface of the second cover body X_min When the first surface of the first cover body and the first surface of the second cover body are perpendicular to each other, the magnetic field sensor detects that the magnetic field in the first direction is B Z_min When the included angle between the first surface of the first cover and the first surface of the second cover is θ, the magnetic field sensor detects that the magnetic field in the first direction is B Z The magnetic field sensor detects that the magnetic field in the third direction is B X Angle theta B′ For theta B′ ＝
Wherein R is a given correction coefficient, and the included angle theta is theta=180-2 theta B′ 。
In an embodiment of the utility model, the connecting piece has a first rotating shaft and a second rotating shaft, the first rotating shaft is connected with a first side edge of the first cover body, so that the first cover body and the connecting piece can rotate along the first rotating shaft, and the second rotating shaft is connected with a first side edge of the second cover body, so that the second cover body and the connecting piece can rotate along the second rotating shaft.
In an embodiment of the utility model, wherein the magnetic field sensor is a tri-axial magnetic field sensor.
In an embodiment of the utility model, the first magnetic member is a permanent magnet or an electromagnet.
In an embodiment of the utility model, the second magnetic element is a permanent magnet or an electromagnet.
In an embodiment of the utility model, the connector has a hinge.
Based on the above, the magnetic field sensor can more accurately calculate the magnetic field direction according to the measured magnetic field by the position change of the first magnetic part located on the connecting piece and the second magnetic part located on the second cover in the space, so as to obtain the relative position relationship between the first cover and the second cover.
Drawings
FIG. 1 is a schematic illustration of a magnetic device according to an embodiment of the present utility model;
FIG. 2 is a schematic illustration of a magnetic device according to an embodiment of the present utility model;
fig. 3 is a schematic diagram of distribution of magnetic lines of force of a magnetic device according to an embodiment of the present utility model;
FIG. 4 is a graph of the magnetic field strength detected by a magnetic field sensor of a magnetic device according to an embodiment of the present utility model;
FIG. 5 is a graph of magnetic field angle versus opening and closing angle according to an embodiment of the present utility model;
FIG. 6 is a graph of magnetic field angle versus opening and closing angle according to an embodiment of the present utility model.
Detailed Description
Reference is made to the following examples and accompanying drawings for a more complete understanding of the utility model, however, the utility model may be practiced in many different forms and should not be construed as being limited to the embodiments set forth herein. In the drawings, however, the components and their relative dimensions may not be drawn to actual scale for clarity.
Fig. 1 is a schematic view of a magnetic device according to an embodiment of the present utility model. A magnetic device 100 comprising: the first cover 110, the second cover 120 and the connecting piece 130. The second cover 120 is assembled on the first cover 110. The connecting piece 130 connects the first cover 110 and the second cover 120, so that an included angle θ is formed between the first cover 110 and the second cover 120. The included angle θ is in the range of 0-180 degrees, but the disclosure is not limited thereto. For example, the included angle θ may be less than 0 degrees, or greater than 180 degrees. The included angle θ between the first cover 110 and the second cover 120 is defined as an included angle formed by the extension of the first plane 114 of the first cover 110 and the first plane 124 of the second cover 120.
In some embodiments, the first cover 110 and the second cover 120 may be any two objects that can be opened and closed, for example, the first cover 110 may be an upper cover of a notebook computer, the second cover 110 may be a base of a notebook computer, or other similar functional objects, and the disclosure is not limited thereto.
In some embodiments, the connecting member 130 has a first shaft 132 and a second shaft 134, the first shaft 132 is connected to the first side 112 of the first cover 110, such that the first cover 110 and the connecting member 130 can rotate along the first shaft 132, and the second shaft 134 is connected to the first side 122 of the second cover 120, such that the second cover 120 and the connecting member 130 can rotate along the second shaft 134.
In other embodiments, the connecting member 130 has a hinge, so that the first cover 110 and the second cover 120 can form an included angle θ.
As shown in fig. 1, the magnetic device 100 further includes a magnetic field sensor 140, a first magnetic member 150, and a second magnetic member 160.
The magnetic field sensor 140 is disposed in the first cover 110. In some embodiments, the magnetic field sensor 140 is located within the first cover 110, below the first surface 114 of the first cover 110. The magnetic field sensor 140 can measure X, Y, Z magnetic field intensity in three directions simultaneously, determine the intensity and direction of the sensed magnetic field B based on the components, and determine the angle θ between the magnetic field B and the Z axis B . In some embodiments, the magnetic field sensor 140 may be a tri-axial magnetic field sensor, or other components with similar functions, but the disclosure is not limited thereto.
The first magnetic member 150 is disposed in the connecting member 130 to generate a first magnetic field B1. According to some embodiments, the first magnetic member 150 is configured and fixed inside the connecting member 130, so that when the connecting member 130 rotates, the first magnetic member 150 can rotate along with the connecting member 130, thereby changing the direction of the first magnetic field B1. According to some embodiments, the first magnetic member 150 is a permanent magnet or an electromagnet, or other components capable of generating a magnetic field, which is not limited in this disclosure.
The second magnetic member 160 is disposed in the second cover 120 and generates a second magnetic field B2. According to some embodiments, the second magnetic member 160 is positioned within the second cover 120 below the first surface 124 of the second cover 120. Therefore, when the second cover 120 rotates relative to the first cover 110 through the rotation of the connecting member 130, the second magnetic member 160 can rotate along with the second cover 120, so as to change the direction of the second magnetic field B2. According to some embodiments, the second magnetic member 160 is a permanent magnet or an electromagnet, or other components capable of generating a magnetic field, which is not limited in this disclosure.
In the present embodiment, the magnetic field sensor 140 senses the first magnetic field B1 generated by the first magnetic member 150 and the second magnetic field B2 generated by the second magnetic member 160 to determine the relative position between the first cover 110 and the second cover 120.
Specifically, the magnetic field sensor 140 is configured to sense a magnetic field component of the first magnetic field B1 and the second magnetic field B2 in the first direction and a magnetic field component of the third direction in the magnetic field sensor 140, so as to determine a relative position between the first cover 110 and the second cover 120. In the present embodiment, the first direction is a direction perpendicular to the first surface 114 of the first cover 110, that is, a normal direction (Z-axis direction) of the first surface 114. The second direction is an extending direction (Y-axis direction) of the first side 112 of the first cover 110, and the third direction is located on the first surface 114 of the first cover 110 and is perpendicular to the first direction and the second direction (X-axis direction).
Fig. 2 is a schematic diagram of a magnetic device according to an embodiment of the present utility model. In this embodiment, the first surface 114 of the first cover 110 and the first surface 124 of the second cover 120 are parallel to each other, and the included angle θ between the first cover 110 and the second cover 120 is 0 degrees.
As shown in fig. 2, in some embodiments, the projections of the first magnetic member 150, the second magnetic member 160, and the magnetic field sensor 140 on the first surface 114 of the first cover 110 are located in a straight line, wherein the projection of the second magnetic member 160 on the first surface 114 of the first cover 110 is located between the first magnetic member 150 and the projection of the magnetic field sensor 140 on the first surface 114 of the first cover 110. With such an arrangement, the magnetic field contribution in the Y-axis direction is negligible when calculating the magnetic field direction.
When the first surface 114 of the first cover 110 and the first surface 124 of the second cover 120 are parallel to each other, the first magnetic field B1 of the first magnetic member 150 is parallel to the first direction (Z direction) in the direction of the first magnetic member 150, and the second magnetic field B2 of the second magnetic member 160 is parallel to the first direction (Z direction) in the direction of the second magnetic member 160.
In addition, the direction of the first magnetic field B1 of the first magnetic member 150 is opposite to the direction of the second magnetic field B2 of the second magnetic member 160 in the second magnetic member 160. By such a configuration, the magnetic field B generated by the first magnetic field B1 and the second magnetic field B2 at the position of the magnetic field sensor 140 can generate the magnetic field B having only the Z direction Z- And the magnetic field strength B in the X direction X Near 0. At this time, the included angle θ between the magnetic field B and the Z axis B About 0 degrees.
Fig. 3 is a schematic diagram of distribution of magnetic lines of force of a magnetic device according to an embodiment of the present utility model. In particular, the distribution of magnetic lines of force of fig. 3 corresponds to the arrangement relationship of the magnetic device 100 shown in fig. 2, that is, the distribution of magnetic lines of force when the included angle between the first cover 110 and the second cover 120 is 0 degrees.
In this embodiment, the first magnetic field B1 emitted from the first magnetic member 150 is emitted from the lower side of the first magnetic member 150 (i.e. the N pole of the first magnetic member 150), and returns to the upper side of the first magnetic member 150 (i.e. the S pole of the first magnetic member 150). The second magnetic field B2 emitted by the second magnetic element 160 is emitted from above the second magnetic element 160 (i.e., the N pole of the second magnetic element 160) and returns to below the second magnetic element 160 (i.e., the S pole of the second magnetic element 160). The contribution of the first magnetic field B1 and the second magnetic field B2 generated at the magnetic field sensor 140 is the magnetic field B. Thus, in the magnetic field line profile shown in fig. 3, the first magnetic member 150 and the second magnetic member 160 can be seen to have opposite magnetic field directions.
When the first cover 110 and the second cover 120 generate different angles θ through the connecting piece 130, the contributions of the first magnetic field B1 and the second magnetic field B2 at the magnetic field sensor 140 will be changed accordingly, so as to change the direction and the intensity of the magnetic field B detected by the magnetic field sensor 140. By detecting the angle theta between the magnetic field B and the Z axis B The included angle θ between the first cover 110 and the second cover 120 can be calculated.
Fig. 4 shows the magnetic field strength detected by a magnetic field sensor of a magnetic device according to an embodiment of the present utility model. The X-axis of fig. 4 is the angle θ between the first cover 110 and the second cover 120, and the Y-axis is the magnetic field strength detected by the magnetic field sensor 140, including the magnetic field strength in the X, Y, Z direction.
First, in the Y-axis direction, since the positions of the magnetic field sensor 140, the first magnetic element 150, and the second magnetic element 160 are the same in the Y-axis direction, the magnetic field component in the Y-axis direction is extremely small and negligible.
As can be seen from fig. 4, the magnetic field in the X direction is minimum at 0 degrees, and then the magnetic field strength increases with increasing angle. On the other hand, the magnetic field in the Z direction is maximum at 0 degrees, and then the magnetic field strength decreases with increasing angle.
In the case of no external magnetic field interference, when the angle between the first cover 110 and the second cover 120 is 0, that is, when the first surface 114 of the first cover 110 and the first surface 124 of the second cover 120 are parallel to each other, the magnetic field sensor 140 should only sense the magnetic field in the Z direction, but not the magnetic field in the X direction. Therefore, at this time, the magnetic field sensor 140 detects that the magnetic field in the X direction is B X_min I.e. the background value of the external magnetic field in the X-direction.
In the case of no external magnetic field interference, when the angle between the first cover 110 and the second cover 120 is 90, that is, when the first surface 114 of the first cover 110 and the first surface 124 of the second cover 120 are perpendicular to each other, the magnetic field sensor 140 should only sense the magnetic field in the X direction, but not the magnetic field in the Z direction. Therefore, at this time, the magnetic field sensor 140 detects that the magnetic field in the Z direction is B Z_min I.e. the background value of the external magnetic field in the Z-direction.
When the angle between the first surface 114 of the first cover 110 and the first surface 124 of the second cover 120 is θ, the magnetic field sensor 140 detects that the magnetic field in the first direction (Z direction) is B Z The magnetic field sensor 140 detects a magnetic field in the third direction (X direction) as B X The magnetic field angle theta detected by the magnetic field sensor 140 B Is that
At this time, the angle θ between the first surface 114 of the first cover 110 and the first surface 124 of the second cover 120 is
θ＝180-2θ B (2)。
In formula (1), the magnetic field B in the X direction detected by the magnetic field sensor 140 X Magnetic field B in Z direction Z All that is required is to remove the background magnetic field B X_min And B is connected with Z_min The contribution is used for correctly calculating the included angle theta between the magnetic field B and the Z axis B 。
Fig. 5 is a graph showing the relationship between the magnetic field angle and the opening/closing angle according to an embodiment of the present utility model. In FIG. 5, the X-axis is the angle θ between the magnetic field B and the Z-axis B The Y-axis is the calculated angle θ between the first surface 114 of the first cover 110 and the first surface 124 of the second cover 120. Therefore, it is possible to determine whether the state between the first cover 110 and the second cover 120 is opened or closed by calculating the angle θ between the first cover 110 and the second cover 120 in the direction of the magnetic field detected by the magnetic field sensor 140.
As shown in FIG. 5, the angle θ between the magnetic field B and the Z axis B The angle θ between the first surface 114 of the first cover 110 and the first surface 124 of the second cover 120 is not a linear relationship. In order to make the relationship between the two linear (or nearly linear), the magnetic field angle θ can be calculated by equation (3) B′
Wherein R is a given correction coefficient, and the included angle theta is
θ＝180-2θ B′ 。
Since a given coefficient R is introduced in the formula (3), θ is calculated B′ Not corresponding to the angle theta between the magnetic field B and the Z axis B . But the angle theta obtained by this given coefficient B′ May be directly equal to the angle θ between the first surface 114 of the first cover 110 and the first surface 124 of the second cover 120, so θ may be calculated B′ And directly obtain the included angle θ between the first cover 110 and the second cover 120.
In some embodiments, the given coefficient R is related to the strength of the first magnetic member 150 and the second magnetic member 160, and to the relative distance between the first magnetic member 150 and the second magnetic member 160 and the magnetic field sensor 140. The given coefficient R can be calculated by numerical simulation.
FIG. 6 is a graph of magnetic field angle versus opening and closing angle according to an embodiment of the present utility model. In FIG. 6, the X-axis is the angle θ calculated according to equation (3) B’ The Y-axis is the calculated angle θ between the first surface 114 of the first cover 110 and the first surface 124 of the second cover 120. In comparison with FIG. 5, the included angle θ in FIG. 6 B’ And the included angle theta is more nearly linear. Therefore, the included angle theta can be calculated B’ The included angle θ between the first cover 110 and the second cover 120 is directly obtained to determine whether the state between the first cover 110 and the second cover 120 is open or closed. In some embodiments, the difference between the actual angle θ between the first cover 110 and the second cover 120 and the calculated angle θ is about between plus or minus 5 degrees, and thus can be regarded as the angle θ obtained by the formula (3) B’ Substantially equal to the angle θ. In practical application, due to the included angle theta B’ Substantially equal to the actual angle θ between the first cover 110 and the second cover 120, so that fewer angles, such as three different angles, can be measured when the angle θ is corrected, and the angle θ can be corrected by the linear relationship as shown in fig. 6, so as to reduce the measurement time spent on angle correction.
In summary, according to the utility model, the magnetic field sensor can more accurately obtain the magnetic field direction according to the measured magnetic field by the position change of the first magnetic piece positioned on the connecting piece and the second magnetic piece positioned on the second cover body in the space, so as to obtain the relative position relationship between the first cover body and the second cover body.
Claims (11)
1. A magnetic device, comprising:
a first cover;
the second cover body is assembled on the first cover body;
the connecting piece is connected with the first cover body and the second cover body, so that an included angle is formed between the first cover body and the second cover body;
a magnetic field sensor disposed in the first cover;
the first magnetic piece is arranged in the connecting piece and generates a first magnetic field; and
a second magnetic member disposed in the second cover for generating a second magnetic field,
the magnetic field sensor senses the first magnetic field and the second magnetic field to determine the included angle between the first cover and the second cover.
2. The magnetic device according to claim 1, wherein the magnetic field sensor is configured to sense a magnetic field component of the first magnetic field and the second magnetic field in a first direction and a magnetic field component of the second magnetic field in a third direction in the magnetic field sensor to determine a relative position between the first cover and the second cover,
the first direction is a direction perpendicular to the first surface of the first cover body, the second direction is an extending direction of the first side edge of the first cover body, and the third direction is located on the first surface of the first cover body and perpendicular to the first direction and the second direction.
3. The magnetic device of claim 2, wherein when the first surface of the first cover and the first surface of the second cover are parallel to each other, the first magnetic field of the first magnetic member is parallel to the first direction in the direction of the first magnetic member, and the second magnetic field of the second magnetic member is parallel to the first direction in the direction of the second magnetic member.
4. A magnetic device according to claim 3, wherein the first magnetic field of the first magnetic member is in the opposite direction to the second magnetic field of the second magnetic member.
5. A magnetic device according to claim 2, wherein,
when the first surface of the first cover body and the first surface of the second cover body are parallel to each other, the magnetic field sensor detects that the magnetic field in the third direction is B X_min ，
When the first surface of the first cover body and the first surface of the second cover body are perpendicular to each other, the magnetic field sensor detects that the magnetic field in the first direction is B Z_min ，
When the included angle between the first surface of the first cover and the first surface of the second cover is θ, the magnetic field sensor detects that the magnetic field in the first direction is B Z The magnetic field sensor detects that the magnetic field in the third direction is B Z The magnetic field angle theta detected by the magnetic field sensor B Is that
The included angle theta is
θ＝180-2θ B 。
6. A magnetic device according to claim 2, wherein,
when the first surface of the first cover body and the first surface of the second cover body are parallel to each other, the magnetic field sensor detects that the magnetic field in the third direction is B X_min ，
When the first surface of the first cover body and the first surface of the second cover body are perpendicular to each other, the magnetic field sensor detects that the magnetic field in the first direction is B Z_min ，
When the included angle between the first surface of the first cover and the first surface of the second cover is θ, the magnetic field sensor detects that the magnetic field in the first direction is B Z The magnetic field sensor detects that the magnetic field in the third direction is B X Angle theta B’ Is that
the included angle theta is
θ＝180-2θ B′ 。
7. The magnetic device of claim 1, wherein the connector has a first axis of rotation and a second axis of rotation, the first axis of rotation being coupled to the first side of the first cover such that the first cover and the connector are rotatable about the first axis of rotation, the second axis of rotation being coupled to the first side of the second cover such that the second cover and the connector are rotatable about the second axis of rotation.
8. The magnetic device of claim 1, wherein the magnetic field sensor is a tri-axial magnetic field sensor.
9. The magnetic device of claim 1, wherein the first magnetic member is a permanent magnet or an electromagnet.
10. The magnetic device of claim 1, wherein the second magnetic element is a permanent magnet or an electromagnet.
11. The magnetic device of claim 1, wherein the connector has a hinge.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW111212829U TWM640143U (en) | 2022-11-22 | 2022-11-22 | Magnetic device |
| TW111212829 | 2022-11-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219244527U true CN219244527U (en) | 2023-06-23 |
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ID=86810347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223403703.8U Active CN219244527U (en) | 2022-11-22 | 2022-12-19 | Magnetic device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN219244527U (en) |
| TW (1) | TWM640143U (en) |
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2022
- 2022-11-22 TW TW111212829U patent/TWM640143U/en unknown
- 2022-12-19 CN CN202223403703.8U patent/CN219244527U/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| TWM640143U (en) | 2023-04-21 |
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