Three-dimensional haptic feedback motor

Abstract

The application relates to a three-way haptic feedback motor, which comprises a shell and a circuit board, the shell is provided with a mass block, a coil, a magnet and an elastic piece, the inner wall of the shell comprises a front inner wall, a rear inner wall, a left inner wall, a right inner wall, an upper inner wall and a lower inner wall, the mass block is provided with a front wall surface, a rear wall surface, a left wall surface, a right wall surface, an upper wall surface and a lower wall surface, the elastic piece at least comprises a first elastic piece, a second elastic piece, a third elastic piece and a fourth elastic piece, and the mass block is suspended in the shell through the first elastic piece, the second elastic piece, the third elastic piece and the fourth elastic piece. Different coils and magnets are utilized to realize driving in different directions, multiple directions and multiple types of haptic feedback are formed, only one mass block needs to be arranged, the structure is simple, and the whole feedback motor structure is simple and compact.

Description

Technical Field

[0001] This invention relates to a three-way haptic feedback motor. Background Technology

[0002] Haptic feedback motors are micro-motors primarily used in smart electronic devices such as smartphones, smartwatches, and virtual reality systems. Traditional smart electronic devices can render realistic visual scenes, but lack the tactile experience of simulating 3D objects; mapping visual and tactile information is often very difficult. People desire richer experiences, wanting to touch and perceive virtual objects while simultaneously seeing them. To achieve this, three-way haptic feedback motors are necessary to provide intuitive, realistic multi-degree-of-freedom force tactile feedback, guiding user hand movements and enabling a richer exploration of experiences. For example, Chinese utility model patent CN212278093U, entitled "XYZ Three-Directional Vibrator," discloses an XYZ three-directional vibrator, including a housing, a base, an oscillator assembly, and a stator assembly. The housing and base are combined to form a receiving space. The oscillator assembly includes an XY-direction vibrating block and a Z-direction vibrating block. The stator assembly includes a coil and a flexible circuit board. The XY-direction and Z-direction vibrating blocks are fixed and suspended in the receiving space by elastic elements. A circular hole is provided in the center of the XY-direction vibrating block, and the circular hole surrounds the Z-direction vibrating block. The vibrating block is inlaid with a first magnet assembly and a second magnet assembly. The first magnet assembly is inlaid parallel to both ends of the short side of the vibrating block in the XY direction, and the second magnet assembly is inlaid in the middle of the first magnet assembly. The first and second magnet assemblies are symmetrical about the circular hole. The first and second magnet assemblies are provided with coils in the direction corresponding to the base. The bottom of the vibrating block in the Z direction is provided with a magnetically conductive shell. The Z-direction driving magnet is fixed inside the magnetically conductive shell. A coil is provided between the magnetically conductive shell and the Z-direction driving magnet. The coil is electrically connected to a flexible circuit board, which is set on the base.

[0003] In order to achieve triaxial vibration, the haptic feedback motor in the aforementioned patent needs to be equipped with two vibration blocks. One vibration block is responsible for vibration in the XY direction, and the other vibration block is responsible for vibration in the Z direction. This results in a large number of parts, a large size, and a non-compact structure.

[0004] In view of this, the inventors of this case conducted in-depth research on the above-mentioned problems, which led to the creation of this case. Summary of the Invention

[0005] The purpose of this invention is to provide a simple and compact three-way haptic feedback motor.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A three-way haptic feedback motor includes a housing and a circuit board. The housing contains a mass block, a coil electrically connected to the circuit board, a magnet cooperating with the coil, and an elastic element. The inner walls of the housing include a front inner wall, a rear inner wall, a left inner wall, a right inner wall, an upper inner wall, and a lower inner wall. The coil is mounted on each of these inner walls. The mass block has a front wall surface, a rear wall surface, a left wall surface, a right wall surface, an upper wall surface, and a lower wall surface, corresponding to the front inner wall, rear inner wall, left inner wall, right inner wall, upper inner wall, and lower inner wall, respectively. The magnet is located on each of these inner walls. The elastic element includes at least a first elastic element, a second elastic element, a third elastic element, and a fourth elastic element. One end of the first elastic element is mounted on the left wall, and the other end is mounted in the housing via a first slider that can move back and forth. One end of the second elastic element is mounted on the right wall, and the other end is mounted in the housing via a second slider that can move back and forth. One end of the third elastic element is mounted on the upper wall, and the other end is mounted in the housing via a back and forth movement. One end of the fourth elastic element is mounted on the lower wall, and the other end is mounted in the housing via a back and forth movement. The mass block is suspended in the housing by the first, second, third, and fourth elastic elements.

[0008] In a preferred embodiment of the present invention, the first elastic element, the second elastic element, the third elastic element, and the fourth elastic element are all leaf springs, and the leaf spring includes a first fixed part, a second fixed part, and an elastic telescopic part formed between the first fixed part and the second fixed part.

[0009] In a preferred embodiment of the present invention, the elastic telescopic part includes an S-shaped bending and stretching part and a connecting arm, the connecting arm being connected to the second fixing part, and the S-shaped bending and stretching part being connected to the first fixing part.

[0010] In a preferred embodiment of the present invention, the first fixing part of the first elastic element is fixed to the left wall surface, the second fixing part of the first elastic element is fixed to the first slider, the first slider is mounted on the lower inner wall, the first fixing part of the second elastic element is fixed to the right wall surface, the second fixing part of the second elastic element is fixed to the second slider, the second slider is mounted on the upper inner wall, the first fixing part of the third elastic element is fixed to the upper wall surface, the second fixing part of the third elastic element is fixed to the third slider, the third slider is mounted on the left inner wall, the first fixing part of the fourth elastic element is fixed to the lower wall surface, the second fixing part of the fourth elastic element is fixed to the fourth slider, and the fourth slider is mounted on the right inner wall.

[0011] In a preferred embodiment of the present invention, the first slider, the second slider, the third slider, and the fourth slider are all mounted in corresponding positions by means of planar ball bearings, and the first slider, the second slider, the third slider, and the fourth slider are arranged in parallel.

[0012] In a preferred embodiment of the present invention, the mass block is provided with a first limiting block, a second limiting block, a third limiting block and a fourth limiting block for limiting the movement stroke of the mass block. The first limiting block extends toward the left inner wall, the second limiting block extends toward the right inner wall, the third limiting block extends toward the upper inner wall and the fourth limiting block extends toward the lower inner wall.

[0013] As a preferred embodiment of the present invention, it further includes a fifth elastic member and a sixth elastic member, wherein the fifth elastic member is disposed on the front wall surface and the sixth elastic member is disposed on the rear wall surface.

[0014] In a preferred embodiment of the present invention, both the fifth elastic element and the sixth elastic element are wave springs.

[0015] In a preferred embodiment of the present invention, the front inner wall, the rear inner wall, the left inner wall, the right inner wall, the upper inner wall, and the lower inner wall are each provided with a limiting boss, the coil is sleeved on the limiting boss, and the front wall surface, the rear wall surface, the left wall surface, the right wall surface, the upper wall surface, and the lower wall surface are each provided with a mounting groove, and the magnet is embedded in the mounting groove.

[0016] In a preferred embodiment of the present invention, the housing includes a cylindrical body with a square cross-section and a first end cap and a second end cap disposed at both ends of the cylindrical body along its axial direction, wherein the cylindrical body, the first end cap, and the second end cap form a cuboid.

[0017] By adopting the technical solution of the present invention, coils are set on the six walls of the shell and magnets are set on the six walls of the mass block. When the coils are energized, magnetic field lines are generated, thereby driving the magnets to move. Different coils and magnets can be used to achieve driving in different directions, forming multiple directions and various types of tactile feedback. The present invention only requires setting one mass block, its structure is simple, and the entire feedback motor structure is compact. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention.

[0019] Figure 2 This is a partial exploded structural diagram of the present invention.

[0020] Figure 3 This is a schematic diagram of the structure of the present invention (wherein the first end cap and the second end cap are not shown).

[0021] Figure 4This is a structural schematic diagram of the present invention from another angle (where the first end cap and the second end cap are not shown).

[0022] Figure 5 This is a schematic diagram of the structure of the mass block of the present invention.

[0023] Figure 6 This is a schematic diagram of the leaf spring in this invention.

[0024] In the picture:

[0025] Left inner wall 11 Right inner wall 12

[0026] Upper inner wall 13 Lower inner wall 14

[0027] Anterior inner wall 15, posterior inner wall 16

[0028] Limiting boss 17, coil 20

[0029] Left wall 31 Right wall 32

[0030] Upper wall 33 Lower wall 34

[0031] Front wall 35, rear wall 36

[0032] Mounting slot 37 First limiting block 381

[0033] Second limiting block 382 Third limiting block 383

[0034] Fourth limit block 384, leaf spring 40

[0035] First elastic element 41 Second elastic element 42

[0036] Third elastic element 43 Fourth elastic element 44

[0037] Sixth elastic element 45 First fixing part 401

[0038] Second fixing part 402 Connecting arm 403

[0039] S-shaped bending and stretching section 404, first slider 51

[0040] Second slider 52, Third slider 53

[0041] Fourth slider 54, flat ball bearing 60

[0042] Magnet 70 First end cap 101

[0043] Second end cap 102, cylinder 103 Detailed Implementation

[0044] To further explain the technical solution of the present invention, the following detailed description is provided in conjunction with embodiments.

[0045] Reference Figures 1 to 6 A three-way haptic feedback motor includes a housing and a circuit board (not shown in the figure). The housing contains a mass block, a coil 20 electrically connected to the circuit board, a magnet 70 cooperating with the coil 20, and an elastic element. The circuit board controls the magnitude and direction of the energization of the coil 20 and is electrically connected to an external power source. In this invention, the magnet 70 is made of magnetic steel, specifically a neodymium iron boron permanent magnet 70. The inner wall of the housing includes a front inner wall 15, a rear inner wall 16, a left inner wall 11, a right inner wall 12, an upper inner wall 13, and a lower inner wall 14. The coils 20 are respectively installed on the front inner wall 15, the rear inner wall 16, the left inner wall 11, the right inner wall 12, the upper inner wall 13, and the lower inner wall 14. The mass block is provided with a front wall surface 35, a rear wall surface 36, a left wall surface 31, a right wall surface 32, an upper wall surface 33, and a lower wall surface 34 corresponding to the front inner wall 15, the rear inner wall 16, the left inner wall 11, the right inner wall 12, the upper inner wall 13, and the lower inner wall 14. The magnets 70 are provided on the front wall surface 35, the rear wall surface 36, the left wall surface 31, the right wall surface 32, the upper wall surface 33, and the lower wall surface 34.

[0046] In this invention, the elastic elements include at least a first elastic element 41, a second elastic element 42, a third elastic element 43, and a fourth elastic element 44. One end of the first elastic element 41 is mounted on the left wall surface 31, and the other end is movably mounted in the housing via a first slider 51. One end of the second elastic element 42 is mounted on the right wall surface 32, and the other end is movably mounted in the housing via a second slider 52. One end of the third elastic element 43 is mounted on the upper wall surface 33, and the other end is movably mounted in the housing. One end of the fourth elastic element 44 is mounted on the lower wall surface 34, and the other end is movably mounted in the housing. The mass block is suspended in the housing by the first elastic element 41, the second elastic element 42, the third elastic element 43, and the fourth elastic element 44.

[0047] In a preferred embodiment of the present invention, the first elastic member 41, the second elastic member 42, the third elastic member 43 and the fourth elastic member 44 are all leaf springs 40. The leaf springs 40 are flat and include a first fixing part 401, a second fixing part 402 and an elastic telescopic part formed between the first fixing part 401 and the second fixing part 402.

[0048] In a preferred embodiment of the present invention, the elastic telescopic part includes an integrally formed S-shaped extension part 404 and a connecting arm 403, the connecting arm 403 being connected to the second fixing part 402, and the S-shaped extension part 404 being connected to the first fixing part 401.

[0049] In a preferred embodiment of the present invention, the first fixing part 401 of the first elastic member 41 is fixed to the left wall surface 31, the second fixing part 402 of the first elastic member is fixed to the first slider 51, and the first slider 51 is mounted on the lower inner wall 14; the first fixing part 401 of the second elastic member 42 is fixed to the right wall surface 32, the second fixing part 402 of the second elastic member is fixed to the second slider 52, and the second slider 52 is mounted on the upper inner wall 13; the first fixing part 401 of the third elastic member 43 is fixed to the upper wall surface 33, the second fixing part 402 of the third elastic member 43 is fixed to the third slider 53, and the third slider 53 is mounted on the left inner wall 11; the first fixing part 401 of the fourth elastic member 44 is fixed to the lower wall surface 34, the second fixing part 402 of the fourth elastic member 44 is fixed to the fourth slider 54, and the fourth slider 54 is mounted on the right inner wall 12. In this invention, the first elastic member 41, the second elastic member 42, the third elastic member 43, and the fourth elastic member 44 can be fixed in their respective positions by laser welding.

[0050] In a preferred embodiment of the present invention, the first slider 51, the second slider 52, the third slider 53, and the fourth slider 54 are all mounted at corresponding positions via flat ball bearings 60, and the four sliders are arranged in parallel. To better guide the movement of the sliders, the present invention provides corresponding slide rails on the inner wall of the housing.

[0051] In a preferred embodiment of the present invention, the mass block is provided with a first limiting block 381, a second limiting block 382, ​​a third limiting block 383, and a fourth limiting block 384 for limiting the movement stroke of the mass block. The first limiting block 381 extends toward the left inner wall 11 and forms a movable gap between the left inner walls 11. The second limiting block 382 extends toward the right inner wall 12 and forms a movable gap between the right inner wall 12. The third limiting block 383 extends toward the upper inner wall 13 and forms a movable gap between the upper inner wall 13. The fourth limiting block 384 extends toward the lower inner wall 14 and forms a movable gap between the lower inner walls 14.

[0052] As a preferred embodiment of the present invention, it further includes a fifth elastic member and a sixth elastic member 45. The fifth elastic member is disposed on the front wall surface 35, and the sixth elastic member 45 is disposed on the rear wall surface 36. Specifically, it can be fixed by laser welding.

[0053] In a preferred embodiment of the present invention, both the fifth elastic element and the sixth elastic element 45 are wave springs.

[0054] In a preferred embodiment of the present invention, the front inner wall 15, the rear inner wall 16, the left inner wall 11, the right inner wall 12, the upper inner wall 13, and the lower inner wall 14 are each provided with a limiting boss 17. The coil 20 is sleeved on the limiting boss 17, and to ensure insulation, the limiting boss 17 is coated with adhesive. The front wall surface 35, the rear wall surface 36, the left wall surface 31, the right wall surface 32, the upper wall surface 33, and the lower wall surface 34 are each provided with a mounting groove 37, and the magnet 70 is embedded in the mounting groove 37.

[0055] In a preferred embodiment of the present invention, the housing includes a cylindrical body 103 with a square cross-section and a first end cap 101 and a second end cap 102 disposed at both ends of the cylindrical body 103 along its axial direction. The cylindrical body 103, the first end cap 101, and the second end cap 102 form a cuboid. The first end cap 101 and the second end cap 102 can be locked onto the cylindrical body 103 by adhesive or screws.

[0056] The product form of the present invention is not limited to the embodiments described in this case. Any appropriate changes or modifications made to it based on similar ideas should be considered as not departing from the patent scope of the present invention.

Claims

1. A three-way haptic feedback motor, comprising a housing and a circuit board, a mass is arranged in the housing, a coil is electrically connected with the circuit board, a magnet is matched with the coil, and an elastic member is arranged, characterized in that: The inner wall of the shell comprises a front inner wall, a rear inner wall, a left inner wall, a right inner wall, an upper inner wall and a lower inner wall, the front inner wall, the rear inner wall, the left inner wall, the right inner wall, the upper inner wall and the lower inner wall are respectively provided with the coil, the mass block is respectively provided with a front wall surface, a rear wall surface, a left wall surface, a right wall surface, an upper wall surface and a lower wall surface corresponding to the front inner wall, the rear inner wall, the left inner wall, the right inner wall, the upper inner wall and the lower inner wall, the front wall surface, the rear wall surface, the left wall surface, the right wall surface, the upper wall surface and the lower wall surface are all provided with the magnet, the elastic member at least comprises a first elastic member, a second elastic member, a third elastic member and a fourth elastic member, one end of the first elastic member is mounted on the left wall surface, the other end is movably mounted in the shell through a first sliding block, one end of the second elastic member is mounted on the right wall surface, the other end is movably mounted in the shell through a second sliding block, one end of the third elastic member is mounted on the upper wall surface, the other end is movably mounted in the shell, one end of the fourth elastic member is mounted on the lower wall surface, the other end is movably mounted in the shell, the mass block is suspended in the shell through the first elastic member, the second elastic member, the third elastic member and the fourth elastic member; ​ The first elastic member, the second elastic member, the third elastic member and the fourth elastic member are all leaf springs, the leaf spring comprises a first fixed part, a second fixed part and an elastic expansion part formed between the first fixed part and the second fixed part.

2. The three degree of freedom haptic feedback motor of claim 1, wherein: The elastic expansion part comprises an S-shaped bending and stretching part and a connecting arm, the connecting arm is connected with the second fixed part, and the S-shaped bending and stretching part is connected with the first fixed part.

3. The three degree-of-freedom haptic feedback motor of claim 2, wherein: The first fixed part of the first elastic member is fixed on the left wall surface, the second fixed part of the first elastic member is fixed on the first sliding block, the first sliding block is mounted on the lower inner wall, the first fixed part of the second elastic member is fixed on the right wall surface, the second fixed part of the second elastic member is fixed on the second sliding block, the second sliding block is mounted on the upper inner wall, the first fixed part of the third elastic member is fixed on the upper wall surface, the second fixed part of the third elastic member is fixed on the third sliding block, the third sliding block is mounted on the left inner wall, the first fixed part of the fourth elastic member is fixed on the lower wall surface, the second fixed part of the fourth elastic member is fixed on the fourth sliding block, and the fourth sliding block is mounted on the right inner wall.

4. The three degree-of-freedom haptic feedback motor of claim 3, wherein: The first sliding block, the second sliding block, the third sliding block and the fourth sliding block are all mounted in the corresponding positions through plane ball bearings, and the first sliding block, the second sliding block, the third sliding block and the fourth sliding block are arranged in parallel.

5. The three degree-of-freedom haptic feedback motor of claim 4, wherein: The mass block is provided with a first limiting block, a second limiting block, a third limiting block and a fourth limiting block for limiting the movement stroke of the mass block, the first limiting block extends towards the left inner wall, the second limiting block extends towards the right inner wall, the third limiting block extends towards the upper inner wall, and the fourth limiting block extends towards the lower inner wall.

6. The three degree-of-freedom haptic feedback motor of claim 5, wherein: Further comprising a fifth elastic member and a sixth elastic member, the fifth elastic member is arranged on the front wall surface, and the sixth elastic member is arranged on the rear wall surface.

7. The three degree-of-freedom haptic feedback motor of claim 6, wherein: The fifth elastic member and the sixth elastic member are both wave springs.

8. The three degree-of-freedom haptic feedback motor of claim 7, wherein: The front inner wall, the rear inner wall, the left inner wall, the right inner wall, the upper inner wall and the lower inner wall are respectively provided with a limiting boss, the coil is sleeved on the limiting boss, the front wall surface, the rear wall surface, the left wall surface, the right wall surface, the upper wall surface and the lower wall surface are all provided with a mounting groove, and the magnet is embedded in the mounting groove.

9. The three degree-of-freedom haptic feedback motor of claim 8, wherein: The shell comprises a cylindrical body with a square cross section and first and second end covers arranged at the axial ends of the cylindrical body, and the cylindrical body, the first end cover and the second end cover enclose a cuboid.

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