A novel damping structure for a Z-axis linear motor

Abstract

This utility model belongs to the field of linear motor technology, specifically a novel damping structure for a Z-axis linear motor. It includes a housing, a stator assembly at the bottom of the housing, an oscillator assembly inside the housing, and a damping assembly on the top side of the housing's interior. This utility model designs a damping assembly composed of a copper block and a magnetic ring, combined with the structural cooperation between the oscillator assembly and the stator assembly. After the motor is powered off, the relative motion of the magnet and the copper block cuts magnetic lines of force to generate electromagnetic induction. Simultaneously, the magnetic force of the coil, the iron core inside the coil, and the magnet jointly forms a damping force to consume the oscillator's kinetic energy, achieving rapid braking. This structure does not rely on magnetic fluid or physical contact, significantly improving braking stability, quietness, and consistency.

Description

Technical Field

[0001] This utility model relates to the field of linear motor technology, specifically a novel damping structure for a Z-axis linear motor. Background Technology

[0002] Linear vibration motors are commonly used in devices such as mobile phones, tablets, massagers, game controllers, and VR devices to provide vibration functionality for haptic feedback. Therefore, the motor's response speed is a crucial indicator affecting the user experience. Common linear motors operate on simple harmonic motion; when power is cut off, the spring-supported oscillator continues to vibrate freely for a certain period before stopping. This significantly impacts the user experience in various applications. To improve user experience, a braking function is needed to shorten the stopping time.

[0003] In existing technologies, braking technology for Z-axis linear motors typically uses magnetic fluid or foam / silicone materials as damping. However, magnetic fluid is sensitive to temperature, and changes in ambient temperature can significantly alter its physical properties, leading to unstable braking time. Foam or silicone, on the other hand, are physical contact brakes, which not only have poor braking linearity but also generate slight collision noises due to contact, affecting the user experience. Therefore, we propose a novel damping structure for Z-axis linear motors. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a novel damping structure for a Z-axis linear motor. By designing a damping assembly composed of a copper block and a magnet ring, and combining it with the structural coordination of the oscillator assembly and the stator assembly, electromagnetic induction is generated after the motor is powered off by the relative motion of the magnet and the copper block cutting magnetic lines of force. At the same time, the magnetic force of the coil, the iron core inside the coil, and the magnet together form a damping force to consume the kinetic energy of the oscillator, achieving rapid braking and solving the problems mentioned earlier.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a novel damping structure for a Z-axis linear motor, comprising a housing, a stator assembly at the bottom of the housing, an oscillator assembly inside the housing, and a damping assembly on the top side of the housing's interior; the stator assembly includes a base plate fixedly connected to the bottom side of the housing, a flexible plate at the top of the base plate, and a coil connected to the top of the flexible plate; the oscillator assembly includes a mass block disposed inside the housing, a magnetic cup fixedly connected inside the mass block, a magnet fixedly connected to the center of the bottom side of the magnetic cup, and a spring plate fixedly connected to the top side of the base plate, with the bottom side of the mass block abutting against the top side of the spring plate; the damping assembly includes a copper block fixedly connected to the top side of the magnetic cup, and a magnetic ring fixedly connected to the top side of the housing's interior.

[0006] Preferably, the magnetic cup is positioned above the coil, the coil is sleeved on the outside of the magnet, and the magnetic cup is sleeved on the outside of the coil.

[0007] Preferably, the magnetic ring is fitted around the outside of the copper block.

[0008] Preferably, a gasket is fixedly connected to the bottom side of the magnet.

[0009] Preferably, the spring sheet has a pagoda-shaped structure that is smaller at the top and larger at the bottom.

[0010] Preferably, the flexible board is a flexible circuit board.

[0011] This invention provides a novel damping structure for a Z-axis linear motor. Compared with existing technologies, it has the following advantages:

[0012] 1. This novel damping structure for a Z-axis linear motor, through the design of a damping assembly composed of a copper block and a magnet ring, combined with the structural coordination of the oscillator assembly and the stator assembly, utilizes the relative motion of the magnet and the copper block to cut magnetic lines of force and generate electromagnetic induction after the motor is powered off. At the same time, the magnetic force of the coil, the iron core inside the coil, and the magnet together form a damping force to consume the kinetic energy of the oscillator, achieving rapid braking. This structure does not rely on magnetic fluid or physical contact, significantly improving the stability, quietness, and consistency of braking. Attached Figure Description

[0013] Figure 1 This is a front view structural diagram of the main body of this utility model;

[0014] Figure 2 This is a schematic diagram of the main cross-sectional structure of the present invention;

[0015] Figure 3 This is a schematic diagram of the main body disassembled structure of this utility model;

[0016] Figure 4 This is a schematic diagram of the main body disassembled structure of this utility model from another perspective.

[0017] Figure 5 This is a schematic diagram of the connection structure between the mass block and the magnetic bowl of this utility model;

[0018] Figure 6 This is a schematic diagram of the stator assembly structure of this utility model.

[0019] In the diagram: 1. Housing; 2. Flexible circuit board; 3. Coil; 4. Mass block; 5. Magnetic cup; 6. Magnet; 7. Copper block; 8. Magnet ring; 9. Spring plate; 10. Gasket; 11. Base plate. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-6 This utility model provides a technical solution: a novel damping structure for a Z-axis linear motor, including a housing 1, a stator assembly at the bottom of the housing 1, an oscillator assembly inside the housing 1, and a damping assembly on the top side inside the housing 1.

[0022] The stator assembly includes a base plate 11, which is fixedly connected to the bottom side of the housing 1. A flexible plate 2 is provided on the top of the base plate 11, and a coil 3 is connected to the top of the flexible plate 2.

[0023] The oscillator assembly includes a mass block 4, which is disposed inside the housing 1. A magnetic cup 5 is fixedly connected inside the mass block 4. A magnet 6 is fixedly connected to the middle of the bottom side of the magnetic cup 5. A spring plate 9 is also fixedly connected to the top side of the base plate 11. The bottom side of the mass block 4 abuts against the top side of the spring plate 9.

[0024] The damping assembly includes a copper block 7, which is fixedly connected to the top side of the magnetic cup 5, and a magnetic steel ring 8 is fixedly connected to the top side of the inner side of the housing 1.

[0025] The magnetic cup 5 is positioned above the coil 3, the coil 3 is sleeved on the outside of the magnet 6, and the magnetic cup 5 is sleeved on the outside of the coil 3.

[0026] The magnetic ring 8 is fitted onto the outside of the copper block 7.

[0027] When the Z-axis linear motor is working, the base plate 11 provides fixed support for the flexible plate 2 and the coil 3. Alternating current is supplied to the coil 3 through the flexible plate 2, causing the coil 3 to generate an alternating magnetic field. The magnetic cup 5 inside the mass block 4 is fixedly connected to the magnet 6. The magnet 6 itself generates a constant magnetic field, and the coil 3 is sleeved outside the magnet 6, while the magnetic cup 5 is sleeved outside the coil 3. This causes the alternating magnetic field of the coil 3 to interact with the magnetic fields of the magnet 6 and the magnetic cup 5, generating an alternating electromagnetic force along the Z-axis, which propels the mass block 4 to move along the Z-axis. Simultaneously, the spring plate 9 on the top side of the base plate 11, due to its contact with the bottom side of the mass block 4, undergoes elastic deformation with the movement of the mass block 4, generating… The reverse elastic restoring force, combined with the electromagnetic force, enables the mass block 4 to achieve stable reciprocating vibration. When the motor stops being powered on, the copper block 7 on the top side of the magnetic cup 5 continues to move along the Z direction with the mass block 4 due to inertia. Meanwhile, the magnetic steel ring 8 on the top side inside the housing 1 is fitted over the copper block 7. The copper block 7 moves by cutting magnetic field lines in the magnetic field formed by the magnetic steel ring 8, generating an eddy current effect. The eddy current magnetic field interacts with the magnetic field of the magnetic steel ring 8 to form a damping force, which consumes the kinetic energy of the mass block 4. At the same time, the residual magnetic field between the magnetic cup 5, the magnet 6 and the coil 3 interacts to further assist in consuming energy, ultimately causing the mass block 4 to stop vibrating quickly, achieving efficient braking.

[0028] A pad 10 is fixedly connected to the bottom side of the magnet 6, which plays a role in buffering and protecting the magnet 6 during the movement of the mass block 4.

[0029] The spring sheet 9 has a pagoda-shaped structure that is smaller at the top and larger at the bottom. Its bottom is fixed to the base plate 11, and its top abuts against the bottom side of the mass block 4, so that the spring sheet 9 has more uniform elastic deformation characteristics in the Z direction.

[0030] The flexible circuit board 2 is a flexible circuit board. Flexible circuit boards are thin and light, and have flexible wiring. They can adapt to the compact space structure inside the motor, without affecting the movement of other components, and ensure that the coil 3 continuously generates an alternating magnetic field.

[0031] Working principle: When the Z-axis linear motor is working, the base plate 11 provides fixed support for the flexible plate 2 and the coil 3. The flexible plate 2 passes an alternating current to the coil 3, which causes the coil 3 to generate an alternating magnetic field. The magnetic cup 5 inside the mass block 4 is fixedly connected to the magnet 6. The magnet 6 itself generates a constant magnetic field. The coil 3 is sleeved on the outside of the magnet 6 and the magnetic cup 5 is sleeved on the outside of the coil 3. This causes the alternating magnetic field of the coil 3 to interact with the magnetic fields of the magnet 6 and the magnetic cup 5, generating an alternating electromagnetic force along the Z-axis, which pushes the mass block 4 to move along the Z-axis. At the same time, the spring plate 9 on the top side of the base plate 11 abuts against the bottom side of the mass block 4 and undergoes elastic deformation with the movement of the mass block 4, generating a reverse elastic restoring force. Combined with the electromagnetic force, this enables the mass block 4 to achieve stable reciprocating vibration.

[0032] When the motor stops being powered on, the copper block 7 on the top side of the magnetic cup 5 continues to move along the Z direction with the mass block 4 due to inertia. Meanwhile, the magnetic steel ring 8 on the top side inside the housing 1 is fitted over the copper block 7. The copper block 7 moves by cutting magnetic field lines in the magnetic field formed by the magnetic steel ring 8, generating an eddy current effect. The eddy current magnetic field interacts with the magnetic field of the magnetic steel ring 8 to form a damping force, which consumes the kinetic energy of the mass block 4. At the same time, the residual magnetic field between the magnetic cup 5, the magnet 6 and the coil 3 interacts to further assist in consuming energy, ultimately causing the mass block 4 to stop vibrating quickly, achieving efficient braking.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only 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 process, method, article, or apparatus.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel damping structure of a Z-direction linear motor, comprising a housing (1), characterized in that: A stator assembly is provided at the bottom of the housing (1), an oscillator assembly is provided inside the housing (1), and a damping assembly is provided on the top side inside the housing (1). The stator assembly includes a base plate (11), which is fixedly connected to the bottom side of the housing (1). A flexible plate (2) is provided on the top of the base plate (11), and a coil (3) is connected to the top of the flexible plate (2). The oscillator assembly includes a mass block (4), which is disposed inside the housing (1). A magnetic cup (5) is fixedly connected inside the mass block (4). A magnet (6) is fixedly connected to the middle of the bottom side of the magnetic cup (5). A spring plate (9) is also fixedly connected to the top side of the base plate (11). The bottom side of the mass block (4) abuts against the top side of the spring plate (9). The damping assembly includes a copper block (7) which is fixedly connected to the top side of the magnetic bowl (5), and a magnetic steel ring (8) is fixedly connected to the top side of the inner side of the housing (1).

2. A novel damping structure for a Z-direction linear motor according to claim 1, characterized in that: The magnetic bowl (5) is positioned above the coil (3), the coil (3) is sleeved on the outside of the magnet (6), and the magnetic bowl (5) is sleeved on the outside of the coil (3).

3. A new damping structure of Z-direction linear motor according to claim 1, characterized in that: The magnetic ring (8) is fitted on the outside of the copper block (7).

4. The novel damping structure of Z-direction linear motor according to claim 1, characterized in that: A gasket (10) is fixedly connected to the bottom side of the magnet (6).

5. The novel damping structure of Z-direction linear motor according to claim 1, characterized in that: The spring sheet (9) has a pagoda-shaped structure that is smaller at the top and larger at the bottom.

6. A novel damping structure for a Z-direction linear motor according to claim 1, characterized in that: The flexible circuit board (2) is a flexible circuit board.

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