Three-dimensional rocker and smart ring thereof

Abstract

The application relates to a three-dimensional rocker and an intelligent ring thereof, wherein different positions of a strain gauge are deformed in different degrees and directions as a user applies pressure of different sizes and directions to the three-dimensional rocker; after the first, second and third strain bridges respectively collect deformation amounts at the corresponding positions, signals output at the same time present different change rules, so that the pressure of different sizes and directions applied by the user to the three-dimensional rocker can be judged and detected; and the user's light pressing, heavy pressing, front pushing, back pushing, upward pulling, downward pulling and other actions can be realized. The intelligent ring comprises a ring main body and the three-dimensional rocker, and the strain gauge in the three-dimensional rocker is fixedly connected with the ring main body. The three-dimensional rocker and the intelligent ring thereof disclosed by the application can provide three-dimensional rich operations for the user, can easily identify the pressing and up-down-left-right rocking operations of the user on the ring, and can accurately transmit the gesture operation of the user.

Description

Technical Field

[0001] This invention relates to the field of smart wearable device technology, and in particular to a three-dimensional joystick and its smart ring. Background Technology

[0002] With the rise of smart rings in the field of AI human-computer interaction, how to conveniently and accurately transmit the user's gestures on the ring to the terminal device has become a prominent issue.

[0003] However, most smart rings on the market currently only offer one-dimensional operations such as pressing or touching, and cannot provide users with rich three-dimensional operations, thus greatly reducing the usability of the rings. Summary of the Invention

[0004] To address the shortcomings of existing devices in providing three-dimensional operation, this invention proposes a three-dimensional joystick.

[0005] The technical solution adopted in this invention is a three-dimensional rocker, including a strain gauge. A first strain bridge, a second strain bridge, and a third strain bridge are fixedly connected to the lower surface of the strain gauge. The third strain bridge is located between the first strain bridge and the second strain bridge. The arrangement direction of the third strain bridge is perpendicular to the arrangement direction of the first strain bridge and the second strain bridge. A rod is fixedly connected to the upper surface of the strain gauge. The rod is located directly above the third strain bridge.

[0006] In some embodiments, the resistance in the third strain bridge does not overlap with the resistance in the first strain bridge and the second strain bridge in the projection of the third strain bridge along its arrangement direction and in the projection perpendicular to the arrangement direction of the third strain bridge.

[0007] In some embodiments, the resistors in the first strain gauge, the second strain gauge, and the third strain gauge are symmetrically arranged on the lower surface of the strain gauge, and the rod is located at the intersection of the two axes of symmetry.

[0008] In some embodiments, the four resistors in the first strain bridge, the second strain bridge, and the third strain bridge are arranged in a 2×2 rectangular pattern.

[0009] In some embodiments, the arrangement direction of the first strain gauge bridge, the second strain gauge bridge, and the third strain gauge bridge is configured such that the length direction of the resistors is oriented as such.

[0010] In some embodiments, the lower surface of the strain gauge is connected to a support structure that is closer to the edge of the strain gauge than the first strain bridge, the second strain bridge and the third strain bridge. The support structure forms a deformation space, and the first strain bridge, the second strain bridge and the third strain bridge are located in the deformation space.

[0011] In some embodiments, the support structure is a welding point, and the strain gauge is fixedly connected to the circuit board through the welding point.

[0012] In some embodiments, the first strain gauge bridge, the second strain gauge bridge, and the third strain gauge bridge are all electrically connected to the circuit board via solder joints.

[0013] In some embodiments, the strain gauge is a steel plate, and the rod and strain gauge are integrally formed.

[0014] To address the limitation that common smart rings only offer one-dimensional operations such as pressing or touching, and cannot provide users with rich three-dimensional operations, this invention proposes a smart ring.

[0015] The technical solution adopted in this invention is an intelligent ring, comprising a ring body and the aforementioned three-dimensional rocker arm, wherein the strain gauge in the three-dimensional rocker arm is fixedly connected to the ring body.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This application discloses a three-dimensional joystick. A first strain gauge, a second strain gauge, and a third strain gauge are fixedly connected to the lower surface of the joystick. The third strain gauge is located between the first and second strain gauges, and its arrangement direction is perpendicular to that of the first and second strain gauges. A rod is fixedly connected to the upper surface of the strain gauge, positioned directly above the third strain gauge. As the user applies pressure of different magnitudes and directions to the three-dimensional joystick, different positions of the strain gauge will experience deformation of different degrees and directions. After the first, second, and third strain gauges respectively collect the deformation at their corresponding positions, the signals output by the three strain gauges at the same time will exhibit different changing patterns. This allows for the judgment and detection of different magnitudes and directions of pressure applied by the user to the three-dimensional joystick. This enables user actions such as light pressing, heavy pressing, forward pushing, backward pushing, pulling up, and pulling down.

[0018] Compared with the prior art, the three-dimensional joystick disclosed in this application can provide users with rich three-dimensional operations.

[0019] This application also discloses a smart ring, including a ring body and the aforementioned three-dimensional rocker arm, wherein strain gauges in the three-dimensional rocker arm are fixedly connected to the ring body. Compared with the prior art, it can easily recognize the user's pressing and shaking operations on the ring, thereby accurately transmitting the user's gesture operations. Attached Figure Description

[0020] The present invention will now be described in detail with reference to the embodiments and accompanying drawings, wherein:

[0021] Figure 1A schematic diagram of a three-dimensional joystick provided according to an embodiment of the present invention is shown;

[0022] Figure 2 A schematic diagram of a three-dimensional joystick according to another embodiment of the present invention is shown;

[0023] Figure 3 A schematic diagram showing the positional distribution of a first strain bridge, a second strain bridge, and a third strain bridge in a three-dimensional rocker according to an embodiment of the present invention is shown.

[0024] Figure 4 It shows that according to Figure 3 A circuit connection diagram of the first strain bridge in a three-dimensional rocker is provided.

[0025] Figure 5 It shows that according to Figure 3 A circuit connection diagram of a second strain bridge in a three-dimensional rocker is provided.

[0026] Figure 6 It shows that according to Figure 3 A circuit connection diagram of a third strain gauge bridge in a three-dimensional rocker is provided.

[0027] Figure 7 A module configuration diagram of a three-dimensional joystick provided according to an embodiment of the present invention is shown.

[0028] Label Explanation:

[0029] 10. Rod body;

[0030] 20. Strain gauges;

[0031] 31. First strain gauge bridge; 32. Second strain gauge bridge; 33. Third strain gauge bridge;

[0032] 40. Supporting structure;

[0033] 50. Circuit board;

[0034] 60. Protective casing. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Examples of embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0036] This invention discloses a three-dimensional joystick; please refer to [the relevant documentation]. Figures 1 to 7The strain gauge 20 includes a first strain bridge 31, a second strain bridge 32 and a third strain bridge 33 fixedly connected to the lower surface of the strain gauge 20. The third strain bridge 33 is located between the first strain bridge 31 and the second strain bridge 32. The arrangement direction of the third strain bridge 33 is perpendicular to the arrangement direction of the first strain bridge 31 and the second strain bridge 32. A rod 10 is fixedly connected to the upper surface of the strain gauge 20. The rod 10 is located directly above the third strain bridge 33.

[0037] As the user applies pressure of varying magnitude and direction to the 3D joystick, different positions of the strain gauge 20 will exhibit deformation of varying degrees and directions. After the first strain bridge 31, second strain bridge 32, and third strain bridge 33 respectively acquire the deformation at their corresponding positions, the signals output at the same time will show different changing patterns. This allows for the judgment and detection of different magnitudes and directions of pressure applied by the user to the 3D joystick. This enables user actions such as light pressing, heavy pressing, forward pushing, backward pushing, pulling up, and pulling down. Compared with existing technologies, the 3D joystick disclosed in this application can provide users with rich 3D operation capabilities.

[0038] For ease of explanation below, the arrangement direction of the third strain gauge bridge 33 will be referred to as the left-right direction, and the arrangement direction of the first strain gauge bridge 31 and the second strain gauge bridge 32 will be referred to as the up-down direction.

[0039] Specifically, since the left-right and up-down directions are perpendicular, the third strain gauge 33 is located between the first strain gauge 31 and the second strain gauge 32, and the rod 10 is directly above the third strain gauge 33. When the user pushes left and right, pushing to the left and right will cause the strain gauge 20 to produce opposite deformations; that is, one side of the strain gauge 20 will arch while the other side will be concave in the left-right direction. At this time, the third strain gauge 33 is the main detection channel. The third strain gauge 33 identifies the opposite deformation through its own tension / compression state, thereby determining the direction of the user's push and using the magnitude of the deformation to determine the magnitude of the user's pushing force. The signal quantity of the third strain gauge 33 is CH3, and the signal quantity in the left-right direction is calculated using CH3.

[0040] When the user pushes the strain gauge 20 in the up-down direction, pushing upwards and downwards will cause opposite deformations; that is, one side of the strain gauge 20 will arch while the other side will be concave in the up-down direction. At this time, the first strain bridge 31 and the second strain bridge 32 are the main detection channels. When the first strain bridge 31 is in a stretched state, the second strain bridge 32 is in a compressed state; when the first strain bridge 31 is in a compressed state, the second strain bridge 32 is in a stretched state. This allows the user's pushing direction to be determined, and the magnitude of the deformation is used to determine the magnitude of the user's pushing force. The signal quantity of the first strain bridge 31 is CH1, and the signal quantity of the second strain bridge 32 is CH2. The up-down signal quantity can be obtained by subtracting CH2 from CH1.

[0041] When the user presses down or pulls up the lever 10, the strain gauge 20 will arch and dent at the pressing or pulling position of the lever 10. At this time, the first strain bridge 31 and the second strain bridge 32 are the main detection channels, and the first strain bridge 31 and the second strain bridge 32 are simultaneously in a compressed state or simultaneously in a stretched state. This allows the user's pressing or pulling action to be identified, and the magnitude of the deformation is used to determine the magnitude of the pressure or tension. The signal value of pressing / pulling up at this time can be obtained by adding CH1 and CH2.

[0042] In a particularly specific embodiment, the pressure sensor must be able to identify operations in three dimensions. Please refer to the pressure sensor resistor arrangement for details. Figure 3 R3, R4, R7, R8, R11, and R12 are measuring resistors, and the rest are reference resistors. The advantage of this resistor arrangement is that it ensures a good stress change response in all three directions. Figure 3 As shown, the main measuring resistors are positioned around the joystick. This allows for effective detection of joystick movements in three directions.

[0043] Please refer to the module configuration. Figure 7 As shown, when the user pushes lever 10 from the X, Y, and Z directions respectively, the resistors 1-12 will change accordingly. For details, please refer to... Figures 3 to 6 As shown in the diagram below, resistors 1-12 form three Wheatstone bridges, namely CH1 ( Figure 4 ) corresponds to resistors 1-4, CH2( Figure 5 ) corresponds to resistors 5-8, CH3( Figure 6 The corresponding resistors are numbers 9-12. Among them, R3, R4, R7, R8, R11, and R12 are measuring resistors, and the rest are reference resistors.

[0044] The action recognition process is detailed below; please refer to it. Figure 3When the user pushes the bridge left or right in the X direction, CH3 becomes the primary corresponding channel, and the resistance values ​​of the two measuring resistors R11 and R12 change, thus changing the full-bridge output voltage. The signal calculation method is as follows:

[0045] X-direction semaphore = CH3 semaphore;

[0046] When the user pushes / pulls the switch in the Y direction, the measured resistances of both channels CH1 and CH2 change. The signal calculation method is as follows:

[0047] Y-direction semaphore = CH1 semaphore - CH2 semaphore;

[0048] When the user pushes down / pulls up in the Z direction, the measured resistance of both channels CH1 and CH2 changes. The signal calculation method is as follows:

[0049] Z-direction semaphore = CH1 semaphore + CH2 semaphore.

[0050] It should be noted that positioning the rod 10 directly above the third strain gauge bridge 33 serves two purposes. First, it allows for the identification of the direction of the thrust in the left-right direction. When pressure is applied along the direction of the third strain gauge bridge 33, the bridge will exhibit a significant strain change, while the strain changes of the first and second strain gauge bridges 32 are relatively smaller. By analyzing the differences in the output signals of each strain gauge bridge, the direction of the pressure can be accurately determined, distinguishing whether the pressure is in the direction of the third strain gauge bridge 33, the first and second strain gauge bridges 32, or a combination of these directions. Second, it improves the sensitivity of direction detection. When pressure is applied directly above the rod 10, the third strain gauge bridge 33 can detect the deformation caused by the pressure to the greatest extent. This direct mechanical transmission relationship makes the third strain gauge bridge 33 more sensitive to even small changes in the direction of pressure.

[0051] The third strain gauge bridge 33 is arranged perpendicular to the arrangement directions of the first strain gauge bridge 31 and the second strain gauge bridge 32. This allows a two-dimensional orthogonal coordinate system to be established between the third strain gauge bridge 33, the first strain gauge bridge 31, and the second strain gauge bridge 32. By measuring the strain output of the three strain gauge bridges, the direction of pressure can be identified more accurately.

[0052] In some embodiments, please refer to Figure 3 On the projection of the third strain bridge 33 in the arrangement direction and on the projection perpendicular to the arrangement direction of the third strain bridge 33, the resistance in the third strain bridge 33 does not overlap with the resistance in the first strain bridge 31 and the second strain bridge 32.

[0053] When rod 10 is subjected to force, the strain gauge bridge measures pressure by sensing the strain in its own resistance. If there is an overlapping region in the resistance, when one strain gauge bridge experiences strain, its strain will be transmitted to the resistance of other strain gauge bridges through the overlapping part. For example, when the third strain gauge bridge 33 deforms under force, if its resistance overlaps with that of the first strain gauge bridge 31, then the strain of the third strain gauge bridge 33 will be partially transmitted to the first strain gauge bridge 31, causing the first strain gauge bridge 31 to also generate an unintended strain signal, interfering with the accurate measurement of pressure in the direction corresponding to the first strain gauge bridge 31. The design of no overlapping resistance ensures that the strain of each strain gauge bridge is caused only by the pressure in its corresponding direction, avoiding interference from this mechanical coupling and making the measurement results more accurately reflect the actual pressure situation.

[0054] Furthermore, resistors generate weak electric and magnetic fields during operation. If the resistance of the third strain gauge bridge 33 overlaps with the resistances of the first and second strain gauge bridges 32, their generated electric and magnetic fields will couple. This coupling may cause unexpected changes in the resistance value, thus affecting the output signal of the strain gauge bridge. For example, the magnetic field generated by the resistor of the third strain gauge bridge 33 may induce an electromotive force in the resistor of the first strain gauge bridge 31, interfering with the normal measurement of the first strain gauge bridge 31. The design without overlapping regions effectively reduces this coupling of electric and magnetic fields, ensuring the independence and stability of the electrical signals of each strain gauge bridge.

[0055] In some embodiments, please refer to Figure 3 The resistors in the first strain bridge 31, the second strain bridge 32 and the third strain bridge 33 are symmetrically arranged on the lower surface of the strain gauge 20, and the rod 10 is located at the intersection of the two axes of symmetry.

[0056] The symmetrical resistance distribution of the three strain gauge bridges provides richer multi-directional strain information for pressure direction identification. Each strain gauge bridge corresponds to a specific direction, and by comprehensively analyzing the output signals of the three strain gauge bridges, the pressure direction can be determined more accurately. For example, when the pressure direction lies between the directions corresponding to two strain gauge bridges, the symmetrically distributed resistance can more precisely reflect the pressure component in that intermediate direction, thereby improving the resolution and accuracy of pressure direction identification.

[0057] More importantly, with a symmetrical layout, the strain gauge 20 exhibits better stability in identifying the pressure direction. Even if the rod 10 is subjected to minor vibrations or disturbances, causing a brief change in the pressure direction, the symmetrically distributed resistance can mutually verify and correct the pressure direction through strain information from multiple directions, thereby maintaining the accuracy of pressure direction identification.

[0058] In some embodiments, please refer to Figure 3The four resistors in the first strain bridge 31, the second strain bridge 32 and the third strain bridge 33 are arranged in a 2×2 rectangular pattern.

[0059] A 2×2 rectangular arrangement of resistors can directly and effectively sense the strain caused by forces in the rectangular direction, providing a clearer perception of forces in that direction compared to forces in other directions. Furthermore, the 2×2 rectangular arrangement exhibits significant geometric symmetry, which greatly simplifies the algorithm for identifying forces in the rectangular direction. In algorithm design, features such as the rectangle's axis of symmetry and center of symmetry can be utilized to transform the complex problem of force direction identification into the analysis and judgment of signals under specific geometric relationships.

[0060] In some embodiments, please refer to Figure 3 The arrangement direction of the first strain bridge 31, the second strain bridge 32 and the third strain bridge 33 is configured to be the length direction of the resistors.

[0061] The length direction of the resistor is where its strain effect is most significant. Arranging the strain bridge along the length of the resistor maximizes the utilization of the strain resistance's changing characteristics. When the rod 10 is subjected to external force and undergoes strain, the elongation or shortening of the resistor along its length is most pronounced, and this change directly and significantly alters the resistance value.

[0062] In some embodiments, please refer to Figure 2 The lower surface of the strain gauge 20 is connected to a support structure 40 that is closer to the edge of the strain gauge 20 than the first strain bridge 31, the second strain bridge 32 and the third strain bridge 33. The support structure 40 forms a deformation space, in which the first strain bridge 31, the second strain bridge 32 and the third strain bridge 33 are located.

[0063] Specifically, on the one hand, the support structure 40 can protect the strain gauge bridge and prevent the impact from acting directly on the strain gauge bridge in the deformation space. On the other hand, the deformation space ensures that the strain gauge 20 is not obstructed when deformation occurs.

[0064] It should be noted that this application can be used in various ways, such as fixing the strain gauge 20 to other structures, or clamping the edge of the strain gauge 20 directly by hand to achieve subsequent force detection.

[0065] In some embodiments, please refer to Figure 2 The support structure 40 serves as a welding point, and the strain gauge 20 is fixedly connected to the circuit board 50 through the welding point.

[0066] The welding point is formed by melting solder at high temperature, allowing it to fully fuse with the metal parts of the strain gauge 20 and the circuit board 50. This fusion creates a robust whole between the strain gauge 20 and the circuit board 50, capable of withstanding significant mechanical stress.

[0067] In some embodiments, please refer to Figure 2 The first strain gauge bridge 31, the second strain gauge bridge 32 and the third strain gauge bridge 33 are all electrically connected to the circuit board 50 through solder joints.

[0068] The solder joint connection method eliminates the need for additional connectors and cables, resulting in a more compact connection between the strain gauge bridge and the circuit board 50. Furthermore, the connection to the circuit board 50 avoids the need for additional structural components. This helps reduce the overall size of the strain gauge 20 sensor, saving installation space, making it particularly suitable for applications with strict space requirements.

[0069] In some embodiments, please refer to Figure 1 and Figure 2 The strain gauge 20 is made of steel plate, and the rod body 10 and the strain gauge 20 are integrally formed.

[0070] The integral molding of the rod 10 and strain gauge 20 makes the entire component a continuous whole, avoiding stress concentration problems that may occur at the joints, thereby improving the integrity and reliability of the structure. In traditional connection methods between the strain gauge 20 and the rod 10, the connection point is often a weak point in stress, resulting in uneven stress transmission and easy measurement errors. The integral molding structure makes the stress transmission between the strain gauge 20 and the rod 10 more uniform, and the strain gauge 20 can more accurately sense the strain changes on the surface of the rod 10. In addition to steel plates, the strain gauge 20 can also be made of various materials such as metals, semiconductors, polymers, and composite materials.

[0071] In some embodiments, please refer to Figure 1 and Figure 2 The rod 10 is a T-shaped rod 10, which allows users to have a better push-pull experience and makes it easier for users to press.

[0072] In some embodiments, a protective shell 60 is provided above the strain gauge 20, and a portion of the rod 10 protrudes through the protective shell 60 for user pressing or other operations. The protective shell 60 is provided to protect the strain gauge 20 from damage caused by direct external impact. Waterproofing is also applied to the perforations of the rod 10 on the protective shell 60, for example, by using a waterproof sleeve.

[0073] To address the limitation that common smart rings only offer one-dimensional operations such as pressing or touching, and cannot provide users with rich three-dimensional operations, this invention proposes a smart ring.

[0074] The technical solution adopted in this invention is a smart ring, comprising a ring body and the aforementioned three-dimensional rocker arm, wherein strain gauges 20 in the three-dimensional rocker arm are fixedly connected to the ring body. Compared with existing technologies, it can easily recognize user presses and shakes (up, down, left, right) on the ring, thereby accurately transmitting user gestures.

[0075] The ring body can be a shell, skeleton, or other structure, and is used to fix the strain gauge 20 on the three-dimensional rocker.

[0076] In the description of this specification, the use of terms such as "Embodiment 1," "this embodiment," or "in one embodiment" indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example; moreover, the specific features, structures, materials, or characteristics described may be combined in any appropriate manner in one or more embodiments or examples.

[0077] In the description of this specification, the terms "connection," "installation," "fixing," "setting," and "having" are interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0078] In the description of this specification, relational terms such as “first” and “second” are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0079] The above description of the embodiments is intended to enable those skilled in the art to understand and apply the technology of this invention. Those skilled in the art can easily make various modifications to these examples and apply the general principles described herein to other embodiments without creative effort. Therefore, this invention is not limited to the above embodiments. Modifications in the following situations should be within the scope of protection of this invention: ① New technical solutions implemented based on the technical solution of this invention and combined with existing common knowledge, where the technical effects of the new technical solution do not exceed the technical effects of this invention; ② Equivalent substitutions of some features of the technical solution of this invention using known technology, resulting in the same technical effects as those of this invention; ③ Extendable technical solutions based on the technical solution of this invention, where the substantive content of the extended technical solution does not exceed the technical solution of this invention; ④ Equivalent transformations made using the content of this specification and drawings, directly or indirectly applied to other related technical fields.

Claims

1. A three-dimensional joystick, characterized in that, The strain gauge includes a strain gauge, on the lower surface of which a first strain bridge, a second strain bridge, and a third strain bridge are fixedly connected. The third strain bridge is located between the first strain bridge and the second strain bridge, and the arrangement direction of the third strain bridge is perpendicular to the arrangement direction of the first strain bridge and the second strain bridge. A rod is fixedly connected to the upper surface of the strain gauge, and the rod is located directly above the third strain bridge. The third strain gauge bridge is used to detect the force in the X direction, the signal difference between the first strain gauge bridge and the second strain gauge bridge is used to detect the force in the Y direction, and the sum of the signal values ​​of the first strain gauge bridge and the second strain gauge bridge is used to detect the force in the Z direction. The X direction is the arrangement direction of the third strain gauge bridge, the Y direction is the arrangement direction of the first strain gauge bridge and the second strain gauge bridge, and the Z direction is perpendicular to both the X and Y directions. On the projection of the third strain gauge bridge along its arrangement direction and on the projection perpendicular to the arrangement direction of the third strain gauge bridge, the resistance in the third strain gauge bridge does not overlap with the resistance in the first strain gauge bridge and the second strain gauge bridge.

2. The three-dimensional joystick according to claim 1, characterized in that, The resistors in the first strain gauge, the second strain gauge, and the third strain gauge are symmetrically arranged on the lower surface of the strain gauge, and the rod is located at the intersection of the two axes of symmetry.

3. The three-dimensional joystick according to claim 2, characterized in that, The four resistors in the first strain gauge bridge, the second strain gauge bridge, and the third strain gauge bridge are all arranged in a 2×2 rectangular pattern.

4. The three-dimensional joystick according to claim 3, characterized in that, The arrangement direction of the first strain gauge bridge, the second strain gauge bridge and the third strain gauge bridge is configured such that the length direction of the resistor is oriented as such.

5. The three-dimensional joystick according to claim 1, characterized in that, The lower surface of the strain gauge is connected to a support structure that is closer to the edge of the strain gauge than the first strain bridge, the second strain bridge and the third strain bridge. The support structure forms a deformation space, in which the first strain bridge, the second strain bridge and the third strain bridge are located.

6. The three-dimensional joystick according to claim 5, characterized in that, The support structure is a welding point, and the strain gauge is fixedly connected to the circuit board through the welding point.

7. The three-dimensional joystick according to claim 6, characterized in that, The first strain gauge bridge, the second strain gauge bridge, and the third strain gauge bridge are all electrically connected to the circuit board through the solder joint.

8. The three-dimensional joystick according to claim 1, characterized in that, The strain gauge is made of steel plate, and the rod and the strain gauge are integrally formed.

9. A smart ring, characterized in that, It includes a ring body and a three-dimensional rocker as described in any one of claims 1 to 8, wherein the strain gauge in the three-dimensional rocker is fixedly connected to the ring body.

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