Linear knocking motor

Abstract

The linear knocking motor comprises a shell, and one side of the surface of the shell is fixedly connected with an external ring block; one side of the motor assembly is fixedly connected with the inner wall of the shell, and the motor assembly is used for achieving one-way reciprocating knocking motion; the motor assembly comprises a bottom plate fixedly connected with the bottom of the inner wall of the shell, the top of the bottom plate is movably connected with a movable unit, and the top of the shell is fixedly connected with a shell top cover. And the top of the mounting assembly is fixedly connected with the bottom of the shell. According to the linear knocking motor, by utilizing the arrangement of the motor assembly, compared with a traditional elastic piece type eccentric vibration motor, the linear motor has remarkable advantages in the fields of mobile phones and tactile feedback, the mass block is driven to reciprocate in the single direction through a magnetic field in the linear knocking motor, a rotating structure is omitted, the response speed is higher, and starting and stopping are more accurate; therefore, instant and crisp vibration feedback is realized.

Description

Technical Field

[0001] This invention relates to the field of motor technology, specifically to a linear percussion motor. Background Technology

[0002] Eccentric rotor type spring vibration motors are commonly used in existing smartphones, tablets and portable electronic devices to achieve tactile feedback.

[0003] Patent CN117937878A discloses a linear motor, which includes a housing with a receiving cavity, a vibration unit placed within the receiving cavity, a drive unit, and elastic elements disposed on both sides of the vibration unit. The vibration unit includes a mass block and a mover fixed to the mass block. The drive unit is one of a coil and a magnet assembly, and the mover is the other of the coil and magnet assembly. A foam damper is connected between the mass block and the elastic elements. The foam damper includes a local melting point. By heating and melting the local melting point, the foam damper is bonded to the mass block. This patent's linear motor achieves bonding between the foam damper and the mass block by heating the foam damper at a specific point, relying on the adhesiveness of the melted foam damper. This replaces the foam glue used in related technologies, saves Z-axis space, and effectively prevents glue from overflowing to other parts and affecting the linear motor assembly process, thereby improving the vibration performance of the linear motor.

[0004] As described above, existing smartphones, tablets, and portable electronic devices commonly use eccentric rotor spring vibration motors to achieve haptic feedback. These motors generate centrifugal vibration through the high-speed rotation of an eccentric weight. They are simple in structure and low in cost, but they have many drawbacks: the eccentric vibration direction is random, the energy is dispersed, making it difficult to achieve directional linear haptic feedback; the start and stop response is slow, making it impossible to achieve a high-frequency, short-pulse precise tapping effect; traditional spring motors lack a realistic tapping feel and cannot meet the needs of high-end terminal devices for immersive haptic feedback. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a linear tapping motor that solves the problems of random eccentric vibration direction, dispersed energy, difficulty in achieving directional linear tactile feedback, slow start and stop response, inability to achieve high-frequency, short-pulse precise tapping effects, lack of realistic tapping feel in traditional spring-loaded motors, and inability to meet the immersive tactile feedback requirements of high-end terminal devices.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a linear percussion motor, comprising: The outer casing has an external ring block fixedly connected to one side of its surface. A motor assembly, one side of which is fixedly connected to the inner wall of the housing, is used to realize a unidirectional reciprocating striking motion; The motor assembly includes a base plate fixedly connected to the bottom of the inner wall of the housing, a movable unit movably connected to the top of the base plate, and a housing top cover fixedly connected to the top of the housing. Mounting assembly, the top of which is fixedly connected to the bottom of the housing, is used for mounting a linear knocking motor.

[0007] Preferably, a bottom changing coil is provided on the surface of the base plate, and a top changing coil is fixedly connected to the surface of the top cover of the outer casing.

[0008] Preferably, the moving unit includes a sensing plate, with induction coils fixedly connected to both sides of the sensing plate, and striking blocks fixedly connected to both sides of the sensing plate. Anti-collision pads are fixedly connected to the surface of the striking blocks, and heat dissipation holes are opened on the surface of the striking blocks. A reset elastic sheet is fixedly connected to one side of the striking blocks.

[0009] Preferably, the mounting assembly includes a support plate fixedly connected to the bottom of the housing, a track block fixedly connected to the bottom of the support plate, a movable track groove formed on the surface of the track block, and a rear baffle fixedly connected to one side of the track block.

[0010] Preferably, a positioning rail block is movably connected to the inner wall of the movable rail groove, and a pad is fixedly connected to one side of the positioning rail block.

[0011] Preferably, the surface of the support plate is provided with a mounting groove, and the inner wall of the mounting groove is threaded with a bolt.

[0012] Preferably, a bracket is fixedly connected to the middle of the top of the pad, a transmission wheel is rotatably connected to the surface of the bracket, a handle is fixedly connected to the shaft of the transmission wheel, a movable plate is engaged on one side of the surface of the transmission wheel, and a front baffle is fixedly connected to one side of the movable plate.

[0013] Preferably, a limiting groove is formed on the surface of the movable plate, and a positioning plate is movably connected to the inner wall of the limiting groove, and the positioning plate is fixedly connected to the pad.

[0014] This invention provides a linear percussion motor. Compared with the prior art, it has the following advantages: 1. This linear tapping motor, utilizing its motor component design, offers significant advantages over traditional spring-type eccentric vibration motors in the fields of mobile phones and haptic feedback. Internally, it drives a mass block to reciprocate in a single direction via a magnetic field, eliminating the need for a rotating structure. This results in faster response speeds and more precise start-up and stopping, achieving instant and crisp vibration feedback. The linear motor can precisely adjust the vibration frequency, amplitude, and waveform according to control signals, delivering a more realistic and layered haptic experience, suitable for simulating various interactive scenarios such as tapping, sliding, and pressing. Due to its simple structure and lack of eccentric rotating parts, it boasts higher energy efficiency, lower noise, and longer lifespan. Its smaller thickness and flexible installation effectively save internal space in mobile phones. Overall, linear motors outperform traditional sheet motors in terms of vibration direction controllability, feedback sensitivity, energy efficiency, and reliability. They solve the problems of random eccentric vibration direction, energy dispersion, difficulty in achieving directional linear tactile feedback, slow start and stop response, inability to achieve high-frequency, short-pulse precise tapping effects, lack of realistic tapping feel, and inability to meet the immersive tactile feedback requirements of high-end terminal devices.

[0015] 2. This linear impact motor also features a three-coil motor assembly, consisting of a bottom changing coil, a top changing coil, and an induction coil. In the case of a single coil, the magnetic field strength is strong in the middle and weak at both ends during reciprocating motion, which can lead to an uneven force curve. With three coils arranged in parallel, the magnetic field overlap area is smoother, ensuring stable driving force throughout the entire stroke. In addition, the anti-collision pads absorb kinetic energy when the impact block reciprocates at high speed and impacts the end face, preventing high-frequency impact noise caused by hard contact. Furthermore, repeated impacts can cause micro-cracks in the housing or impact block, and the anti-collision pads can effectively extend the lifespan of the motor.

[0016] 3. This linear impact motor, through the installation of the mounting components, generates significant reciprocating impact force and vibration energy during operation. The circuit board, mainly used to support electronic components, is thin and has weak rigidity. If it directly bears the vibration force of the linear motor, it will lead to solder joint fatigue, component cold solder joints, or breakage. If it is mounted on the housing, the vibration energy is directly transmitted to the surface of the machine body. However, if it is mounted on the circuit board, most of the energy will be absorbed by the board, reducing the vibration. By using positioning rails and track blocks, the linear motor will generate a reaction force during operation. Without guide grooves, it is easy for micro-displacement or tilting to occur within the housing. Positioning rails can effectively prevent displacement caused by long-term operation of the linear motor. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is an exploded view of the invention from below; Figure 3 For the present invention Figure 2A magnified view of a section at point A in the middle; Figure 4 This is an exploded view of the present invention; Figure 5 This is a partial schematic diagram of the mounting components of the present invention; Figure 6 This is a partial cross-sectional view of the mounting components of the present invention.

[0018] In the diagram: 1. Outer shell; 2. Motor assembly; 21. Base plate; 22. Movable unit; 23. Top cover of the outer shell; 24. Bottom variable coil; 25. Top variable coil; 26. Induction plate; 27. Induction coil; 28. Impact block; 29. ​​Anti-collision pad; 210. Heat dissipation hole; 211. Reset elastic sheet; 3. Mounting assembly; 31. Bearing plate; 32. Track block; 33. Moving track groove; 34. Rear baffle; 35. Positioning track block; 36. Pad; 37. Mounting circular groove; 38. Bolt; 39. Bracket; 310. Drive wheel; 311. Handle; 312. Moving plate; 313. Front baffle; 314. Limiting groove; 315. Positioning plate; 4. External ring block. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-6 This invention provides two technical solutions: Example 1: A linear percussion motor, comprising: The outer casing 1 has an outer ring block 4 fixedly connected to one side of its surface. Motor assembly 2, one side of which is fixedly connected to the inner wall of housing 1, is used to realize unidirectional reciprocating striking motion through an electromagnetic drive structure; The motor assembly 2 includes a base plate 21 fixedly connected to the bottom of the inner wall of the housing 1, a movable unit 22 movably connected to the top of the base plate 21, and a housing top cover 23 fixedly connected to the top of the housing 1. Mounting component 3 is fixedly connected to the bottom of the outer casing 1 at its top. Mounting component 3 is used to mount the linear tapping motor, ensuring a stable overall motor structure and controlled vibration direction. Utilizing the motor component 2, compared to traditional spring-type eccentric vibration motors, linear motors offer significant advantages in mobile phones and haptic feedback applications. Internally, a magnetic field drives a mass block to reciprocate in a single direction, eliminating the need for a rotating structure. This results in faster response speeds and more precise start-up and stopping, achieving instant and crisp vibration feedback. The linear motor can precisely adjust the vibration frequency, amplitude, and waveform according to control signals, delivering a more realistic and layered haptic experience, suitable for simulating various interactive scenarios such as tapping, sliding, and pressing. Due to its simple structure and lack of eccentric rotating parts, it boasts higher energy efficiency, lower noise, longer lifespan, and is thinner and more flexible in installation, effectively saving internal space in mobile phones. Overall, linear motors outperform traditional sheet motors in terms of vibration direction controllability, feedback sensitivity, energy efficiency, and reliability. They solve the problems of random eccentric vibration direction, energy dispersion, difficulty in achieving directional linear tactile feedback, slow start and stop response, inability to achieve high-frequency, short-pulse precise tapping effects, lack of realistic tapping feel, and inability to meet the immersive tactile feedback requirements of high-end terminal devices.

[0021] Example 2 differs from Example 1 primarily in that it includes a linear percussion motor. A bottom changing coil 24 is mounted on the surface of a base plate 21, and a top changing coil 25 is fixedly connected to the surface of the top cover 23. Two stators integrate E-shaped iron cores, concentrated windings, and embedded Hall sensors, respectively, and are mounted on a stainless steel top cover to form a thick, flat cavity to improve magnetic flux density and response sensitivity. The moving unit 22 includes a sensing plate 26, with sensing coils 27 fixedly connected to both sides of the sensing plate 26. Percussion blocks 28 are fixedly connected to both sides of the sensing plate 26. Anti-collision pads 29 are fixedly connected to the surface of the percussion blocks 28. The anti-collision pads 29 are made of materials including, but not limited to, silicone. Heat dissipation holes 210 are provided on the surface of the percussion blocks 28. In the middle, a reset elastic plate 211 is fixedly connected to one side of the striking block 28. The striking block 28 is a moving part, and all are tungsten copper striking blocks with fan-shaped NdFeB embedded on the inner side, maintaining a very small air gap with the stator pole surface, and can slide freely along the X-axis. The frame of the reset elastic plate 211, i.e. the outer shell 1, is formed by laser cutting of a whole piece of stainless steel. The outer frame is laser welded to the upper cover. The inner cantilever symmetrically clamps the moving part, providing nonlinear restoring force and also serving as a guide. Traditional ball or oil lubrication is eliminated, reducing thickness and extending service life. The mounting component 3 includes a support plate 31 fixedly connected to the bottom of the outer shell 1. A track block 32 is fixedly connected to the bottom of the support plate 31. The surface of the track block 32 is provided with a moving track groove 33. A rear baffle 34 is fixedly connected to one side of the track block 32. 2. The movable track 33 is used to guide the installation direction of the linear motor and prevent it from deviating during operation. A positioning rail block 35 is movably connected to the inner wall of the movable track 33. A pad 36 is fixedly connected to one side of the positioning rail block 35. A mounting groove 37 is opened on the surface of the bearing plate 31. A bolt 38 is threadedly connected to the inner wall of the mounting groove 37. The bolt 38 is finally threadedly connected to external devices such as mobile phones. A bracket 39 is fixedly connected to the middle of the top of the pad 36. A transmission wheel 310 is rotatably connected to the surface of the bracket 39. A handle 311 is fixedly connected to the shaft of the transmission wheel 310. A movable plate 312 meshes with one side of the surface of the transmission wheel 310. Small teeth are provided on the surfaces of both the transmission wheel 310 and the movable plate 312. The two are mutually adapted to each other. One side of the movable plate 312 is fixedly connected to the mounting groove 312. A front baffle 313 is fixedly connected to the moving plate 312, and a limiting groove 314 is formed on the surface of the moving plate 312. The limiting groove 314 can be effectively limited by the positioning plate 315, making the movement of the moving plate 312 more stable. The positioning plate 315 is movably connected to the inner wall of the limiting groove 314, and the positioning plate 315 is fixedly connected to the pad 36. In addition, the bottom changing coil 24, the top changing coil 25, and the induction coil 27 in the motor assembly 2 are all three-coil units. During the reciprocating motion of a single coil, the magnetic field strength is strong in the middle and weak at both ends, which will lead to an uneven force curve. After the three coils are arranged in parallel, the magnetic field overlap area is smoother, which can ensure the driving force is stable throughout the entire stroke. At the same time, through the setting of the anti-collision pad 29, when the striking block reciprocates at high speed and impacts the end face, the anti-collision pad can absorb kinetic energy.To prevent high-frequency impact noise caused by hard contact, and to prevent micro-cracks from appearing on the housing or striking blocks due to repeated impacts, the anti-collision pads effectively extend the lifespan. Utilizing mounting component 3, the linear motor generates significant reciprocating impact force and vibration energy during operation. The circuit board, primarily used to support electronic components, is thin and has low rigidity. Directly bearing the vibration force of the linear motor can lead to solder joint fatigue, component cold solder joints, or breakage. If mounted on the housing, the vibration energy is directly transmitted to the surface of the machine body. However, if mounted on the circuit board, most of the energy is absorbed by the board material, reducing the vibration. Positioning rails 35 and track blocks 32 are used. During operation, the linear motor generates a reaction force. Without guide slots, micro-displacement or tilting can easily occur within the housing. Positioning rails 35 effectively prevent displacement caused by long-term operation of the linear motor.

[0022] The bottom changing coil 24, the top changing coil 25 and the induction coil 27 are all three-coil coils. Before installation, the pad 36 is fixed to the inner wall of the mobile phone shell with adhesive. The bracket 39 and the transmission wheel 310 are connected by a damping shaft. The surface of the front baffle 313 is set with friction texture, which has a very large static friction force. There are two positioning plates 315 with different heights.

[0023] The upper and lower stator windings are excited in opposite phases, generating alternating magnetic pull to drive the two movers to accelerate towards each other. When the movers strike the centrally located aluminum alloy impact platform, the kinetic energy is converted into instantaneous impact force. The drive IC adopts a current closed-loop and feedforward compensation mechanism to actively reduce the current before impact and use the negative stiffness of the spring to quickly pull back and suppress residual vibration. This solution has a symmetrical structure and simple manufacturing process, meeting the urgent needs of next-generation ultra-thin equipment for rapid, high-thrust, and low-residual-vibration impact.

[0024] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0025] During operation, the bottom changing coil 24 on the surface of the base plate 21 and the top changing coil 25 on the bottom of the outer casing 23 act as electromagnets, while the induction coil 27 on the surface of the induction plate 26 acts as a permanent magnet. When the bottom changing coil 24 and the top changing coil 25 are alternately energized, they attract and repel each other with the permanent magnet generated by the induction coil 27 on the surface of the induction plate 26, causing the induction coil 27 to move back and forth continuously. The reset elastic plate 211 reduces the impact force from the striking block 28 and can also reset related mechanisms. Simultaneously, the anti-collision pad 29 cushions the impact. Noise reduction: First, install the pad 36 on the inner wall of the mobile phone or device housing. Align the moving rail groove 33 in the track block 32 at the bottom of the support plate 31 with the positioning rail block 35 at the top of the pad 36 and insert it until the rear baffle 34 contacts the positioning rail block 35. Turn the handle 311 to drive the transmission wheel 310 to rotate, which in turn drives the upper and lower moving plates 312 to move. The limiting groove 314 slides along the positioning plate 315. One side of the front baffle 313 fits against the positioning rail block 35 to limit it and prevent it from moving. The mounting circular groove 37 penetrates the surface of the support plate 31, and the bolt 38 is rotated in to fix the motor as a whole. The installation is complete.

[0026] 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.

[0027] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A linear percussion motor, characterized in that, include: The outer shell (1) has an outer ring block (4) fixedly connected to one side of its surface. Motor assembly (2), one side of which is fixedly connected to the inner wall of the housing (1), the motor assembly (2) is used to realize unidirectional reciprocating striking motion; The motor assembly (2) includes a base plate (21) fixedly connected to the bottom of the inner wall of the housing (1). A movable unit (22) is movably connected to the top of the base plate (21). The movable unit (22) includes a sensing plate (26). A sensing coil (27) is fixedly connected to both sides of the sensing plate (26). A striking block (28) is fixedly connected to both sides of the sensing plate (26). A reset elastic sheet (211) is fixedly connected to one side of the striking block (28). A housing top cover (23) is fixedly connected to the top of the housing (1). Mounting assembly (3), the top of which is fixedly connected to the bottom of housing (1), the mounting assembly (3) being used for mounting a linear tapping motor.

2. A linear percussion motor according to claim 1, characterized in that: The bottom plate (21) is provided with a bottom changing coil (24), and the top cover (23) is fixedly connected with a top changing coil (25).

3. A linear percussion motor according to claim 1, characterized in that: The surface of the striking block (28) is fixedly connected to an anti-collision pad (29), and the surface of the striking block (28) is provided with heat dissipation holes (210).

4. A linear percussion motor according to claim 1, characterized in that: The mounting assembly (3) includes a support plate (31) fixedly connected to the bottom of the housing (1). A track block (32) is fixedly connected to the bottom of the support plate (31). A movable track groove (33) is opened on the surface of the track block (32). A rear baffle (34) is fixedly connected to one side of the track block (32).

5. A linear percussion motor according to claim 4, characterized in that: The inner wall of the movable track (33) is movably connected to a positioning track block (35), and a pad (36) is fixedly connected to one side of the positioning track block (35).

6. A linear percussion motor according to claim 4, characterized in that: The surface of the bearing plate (31) is provided with a mounting groove (37), and the inner wall of the mounting groove (37) is threaded with a bolt (38).

7. A linear percussion motor according to claim 5, characterized in that: A bracket (39) is fixedly connected to the middle of the top of the pad (36). A transmission wheel (310) is rotatably connected to the surface of the bracket (39). A handle (311) is fixedly connected to the shaft of the transmission wheel (310). A movable plate (312) is engaged on one side of the surface of the transmission wheel (310). A front baffle (313) is fixedly connected to one side of the movable plate (312).

8. A linear percussion motor according to claim 7, characterized in that: The surface of the movable plate (312) is provided with a limiting groove (314), and a positioning plate (315) is movably connected to the inner wall of the limiting groove (314). The positioning plate (315) is fixedly connected to the pad (36).

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