A magnetic electromagnet device with touch vibration feedback

Abstract

This invention relates to a magnetically attracted electromagnet device with tactile vibration feedback, comprising a vibrating spring, a device base, and an electromagnet. The electromagnet is installed inside the device base, and a vibrating spring that cooperates with the electromagnet is mounted on the device base. The electromagnet includes a magnetically conductive frame, copper wire, and a skeleton. The magnetically conductive frame has a mountain-shaped structure and includes a base plate, a central column, and side columns. The central column is vertically mounted at the center of the upper part of the base plate, and side columns are mounted on either side of the central column at the upper part of the base plate. The skeleton is sleeved on the central column, and copper wire is wound around the skeleton. This invention simplifies the electromagnet structure and, through theoretical simulation optimization and design, can be applied to automotive decorative panels to achieve the required vibration strength and reliability.

Description

Technical Field

[0001] This invention relates to the field of tactile feedback technology, and in particular to a magnetic electromagnet device that provides tactile vibration feedback. Background Technology

[0002] The intelligentization and digitalization of in-vehicle equipment has become an increasingly important industry in recent years, especially with the development of new energy vehicles. Among them, the human-machine interface (HMI) system is an important intelligent digital device in new energy vehicles. It is the communication interface between machines and humans, and it mainly uses vision and hearing as communication mediums. Due to safety and convenience, tactile communication technology has been introduced. Tactile communication requires the machine to provide feedback signals, and the user can sense and react in time during use. It covers the functions of in-vehicle entertainment and safety. The most common equipment is the display touch screen, which can directly interact and communicate with the user. Its arbitrary shape, thinness, and miniaturization design will make tactile feedback devices one of the important devices of future automotive HMIs.

[0003] When using a touchscreen, users need to touch the screen with their fingers to confirm a press. However, while driving, users cannot simultaneously focus on driving and using the touchscreen, which can easily lead to safety issues. Therefore, haptic feedback was developed. When a finger touches the screen, the user can feel the feedback force from the screen to confirm that the user has pressed the screen, and they do not need to focus on the touchscreen action, allowing them to concentrate on driving. In terms of technical principles, haptic feedback can be divided into four main categories: electric field, capacitance, ultrasound, and drive devices. As for drive devices, vibration can be generated by using coil motors or actuators, piezoelectric devices, MEMS microstructure drives, etc. Motors can use devices such as eccentric motors, linear motors, and ceramic motors. However, due to the requirements of vibration intensity, compliance, response time, and drive voltage, motors are inferior to actuators. Therefore, using actuators as the core object of haptic feedback is a better choice. In terms of actuators, electromagnets can be used as the main vibration component for tactile feedback to achieve goals such as low driving voltage, fast response speed, vibration intensity and high compliance. The main structure of an electromagnet includes materials such as shaft core, winding wire, armature, and housing. It is easy to assemble, easy to design, and highly flexible in combination with touch display screens.

[0004] Patents CN202121272716.9 and CN201910271870.5 describe a touch vibration device for an automotive trim panel. It uses an electromagnet as the vibration driver, triggering the electromagnet via magnetic induction to attract and release the trim panel, causing rapid deformation and vibration. Additionally, patents CN113808819A and CN216389005U mention that touch vibration devices can be driven by electromagnets. The text describes the use of a traditional electromagnet structure as the core driver of the vibration device, comprising a fixed iron core, a moving iron core, and a housing.

[0005] Based on CN202121272716.9 and CN201910271870.5, this patent proposes a novel and progressive tactile vibration feedback device that simplifies the electromagnet structure. Through theoretical simulation optimization and design, it can be applied to automotive decorative panels to achieve the required vibration intensity and reliability for the product. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a magnetic electromagnet device with touch vibration feedback, which simplifies the electromagnet structure and, through theoretical simulation optimization and design, can be applied to automotive decorative panels to achieve the required vibration intensity and reliability of the product.

[0007] The technical solution adopted by the present invention to solve its technical problem is as follows: a magnetic electromagnet device with touch vibration feedback is provided, including a vibrating spring, a device base and an electromagnet. The electromagnet is installed in the device base, and a vibrating spring that cooperates with the electromagnet is installed on the device base. The electromagnet includes a magnetic guide frame, copper wire and skeleton. The magnetic guide frame has a mountain-shaped structure. The magnetic guide frame includes a base plate, a middle column and side columns. The middle column is vertically installed in the middle of the upper part of the base plate. Side columns are installed on both sides of the middle column at the upper part of the base plate. The skeleton is sleeved on the middle column, and copper wire is wound on the skeleton.

[0008] As a supplement to the technical solution described in this invention, the area of ​​the upper surface of the middle column is A1, and the areas of the upper surfaces of the two side columns are A2 and A3, respectively, where A1≥A2+A3 and A2=A3.

[0009] As a supplement to the technical solution described in this invention, the magnetic guide frame is made by precision casting and powder sintering.

[0010] As a supplement to the technical solution described in this invention, the vibrating spring is made by stamping a single piece of magnetically conductive material.

[0011] As a supplement to the technical solution described in this invention, the vibrating spring has an L-shaped structure, and the lower end of the vibrating spring is inserted into the base of the device and fixed by bolts.

[0012] As a supplement to the technical solution described in this invention, a copper sheet is installed at each end of the copper wire.

[0013] As a supplement to the technical solution described in this invention, the distance between the magnetic guide frame and the vibrating spring is L1, and the displacement of the vibrating spring after excitation is L2, where L1>L2.

[0014] As a supplement to the technical solution described in this invention, a recessed point is provided on each of the front and rear sides of the central column, and a protrusion that matches the recessed point is provided inside the frame.

[0015] As a supplement to the technical solution described in this invention, a slot is provided on the inner side of the upper part of the side column, and an upper baffle and a lower baffle are respectively provided on the upper and lower parts of the frame, the upper baffle cooperating with the slot.

[0016] As a supplement to the technical solution described in this invention, the width of the magnetic guide frame is D1 and the length is D2. An arc notch is opened on each of the left and right sides of the middle of the upper end of the vibrating spring, and the distance between the two arc notches is D3. A through hole is opened on each of the front and rear sides of the upper end of the vibrating spring located on the magnetic guide frame, and the distance between the two through holes is D4. D1≥D3 and D2≥D4.

[0017] Beneficial effects: This invention relates to a magnetic electromagnet device with touch vibration feedback, which simplifies the electromagnet structure and, through theoretical simulation optimization and design, can be applied to automotive decorative panels to achieve the required vibration intensity and reliability for the product. Attached Figure Description

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

[0019] Figure 2 This is a schematic diagram of the structure of the electromagnet described in this invention;

[0020] Figure 3 This is a schematic diagram of the structure of the magnetic guide frame described in this invention;

[0021] Figure 4 This is a schematic diagram of the internal structure of the skeleton described in this invention;

[0022] Figure 5 This is a cross-sectional view of the vibrating spring and the device base described in this invention;

[0023] Figure 6 This is a schematic diagram illustrating the vibration principle of the present invention;

[0024] Figure 7 This is a simulation diagram of the oscillation displacement of the vibrating spring of the present invention;

[0025] Figure 8 This is a schematic diagram of the structure of the present invention after the plug is installed;

[0026] Figure 9 This is a schematic diagram of the vibration feedback system used in this invention;

[0027] Figure 10 This is a schematic diagram of the structure of the vibrating spring and the magnetic guide frame described in this invention.

[0028] Diagram: 101, Vibrating spring; 102, Arc notch; 103, Through hole; 200, Electromagnet; 201, Magnetic guide frame; 202, Copper wire; 203, Skeleton; 204, Copper sheet; 205, Base plate; 206, Middle column; 207, Side column; 208, Concave point; 209, Slot; 210, Protrusion; 211, Upper baffle; 212, Lower baffle; 300, Device base; 301, Spring positioning hole; 302, Base positioning hole; 303, Bolt; 400, Plug; 601, Contact object; 602, Control unit; 603, Vibration unit; 604, Power supply unit. Detailed Implementation

[0029] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0030] Embodiments of the present invention relate to a magnetic electromagnet device with touch vibration feedback, such as... Figure 1-10 As shown, the device includes a vibrating spring 101, a device base 300, and an electromagnet 200. The electromagnet 200 is installed inside the device base 300, and a vibrating spring 101 that cooperates with the electromagnet 200 is installed on the device base 300. The electromagnet 200 includes a magnetic guide frame 201, a copper wire 202, and a skeleton 203. The magnetic guide frame 201 has a mountain-shaped structure. The magnetic guide frame 201 includes a base plate 205, a central column 206, and side columns 207. The central column 206 is vertically installed in the middle of the upper end of the base plate 205. A side column 207 is installed on each side of the central column 206 at the upper end of the base plate 205. The skeleton 203 is sleeved on the central column 206. The copper wire 202 is wound on the skeleton 203. A copper sheet 204 is installed at each end of the copper wire 202. The copper wire 202 and the copper sheet 204 are welded together for conductivity.

[0031] The central column 206 has a recess 208 on each of its front and rear sides, and the frame 203 has a protrusion 210 inside that matches the recess 208.

[0032] The inner side of the upper part of the side column 207 is provided with a slot 209, and the upper part and lower part of the frame 203 are respectively provided with an upper baffle 211 and a lower baffle 212, which cooperate with the slot 209.

[0033] When the copper sheet 204 becomes conductive, causing the copper wire 202 to be energized, the vibrating spring 101 deforms downwards due to the magnetic force, such as... Figure 7 As shown, when the power is off, the L-shaped structure of the vibrating spring 101 can vibrate up and down to generate a vibration.

[0034] like Figure 2 As shown, the electromagnet 200 is composed of a magnetic frame 201, copper wire 202, skeleton 203 and copper sheet 204. The copper wire 202 is wound around the skeleton. After winding, the copper wire 202 and the copper sheet 204 are welded together to conduct electricity. The coil is assembled into the magnetic frame 201 and fixed by the cooperation of the concave point 208 and the slot 209 of the magnetic frame 201 with the protrusion 210 and the upper baffle 211 of the skeleton 203.

[0035] The area of ​​the upper surface of the middle column 206 is A1, and the areas of the upper surfaces of the two side columns 207 are A2 and A3, respectively. A1≥A2+A3 and A2=A3, which can achieve a better electromagnetic force ratio under the condition of limited volume.

[0036] The magnetic guide frame 201 is made by precision casting and powder sintering, which can avoid the loss of electromagnetic force caused by eddy currents when using silicon steel sheets.

[0037] The vibrating reed 101 is made of a single piece of magnetic material and its thickness exceeds the excitation effect of electromagnetic force. Its thickness cannot bring about the effect of increasing electromagnetic force, and its excessive thickness also causes the downward deformation to be smaller, affecting the vibration.

[0038] The vibrating spring 101 has an L-shaped structure. The lower end of the vibrating spring 101 is inserted into the device base 300. The lower part of the vibrating spring 101 is provided with a spring positioning hole 301. The device base 300 is provided with a base positioning hole 302 on one side. The base positioning hole 302 is aligned with the spring positioning hole 301 and fixed by bolts 303.

[0039] The distance between the magnetically conductive frame 201 and the vibrating spring 101 is L1, and the displacement of the vibrating spring 101 after being energized is L2, where L1>L2.

[0040] The magnetically conductive frame 201 has a width of D1 and a length of D2. The upper end of the vibrating spring 101 has an arc-shaped notch 102 on each of its left and right sides, with a distance of D3 between the two notches. The upper end of the vibrating spring 101 has a through hole 103 on each of its front and rear sides of the magnetically conductive frame 201, with a distance of D4 between the two through holes. D1 ≥ D3 and D2 ≥ D4. When D1 < D3, it does not help increase the electromagnetic force; when D2 < D4, it causes excessive electromagnetic force, resulting in the vibrating spring 101 directly impacting the magnetically conductive frame 201 and generating noise.

[0041] like Figure 8 As shown, a stopper 400 is placed on the electromagnet 200, and a vibrating spring 101 is connected to the vibrating component, as follows. Figure 5 As shown, the vibrating spring 101 is inserted into the device base 300, and the bolt 303 passes through the spring positioning hole 301 and the base positioning hole 302 and is locked in place.

[0042] like Figure 9 As shown, when a user touches the object 601, the object 601 transmits a signal to the control unit 602, which then transmits the signal to the vibration unit 603. The vibration unit 603 can be a single vibrating electromagnet or multiple electromagnets (an array of electromagnets). The power supply unit 604 provides power to the vibration unit 603.

[0043] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0044] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0045] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0046] The above provides a detailed description of a touch-vibration feedback magnetic electromagnet device provided in this application. Specific examples have been used to illustrate the principle and implementation of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this application. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A magnetic attraction type electromagnet device with touch vibration feedback, comprising a vibration reed (101), a device base (300) and an electromagnet (200), characterized in that: The device base (300) is installed with an electromagnet (200), and the device base (300) is installed with a vibration spring blade (101) matched with the electromagnet (200), the electromagnet (200) comprises a magnetic conducting frame (201), a copper wire (202) and a framework (203), the magnetic conducting frame (201) is in a mountain-shaped structure, the magnetic conducting frame (201) comprises a bottom plate (205), an intermediate column (206) and a side column (207), the intermediate column (206) is vertically installed on the middle part of the upper end of the bottom plate (205), one side column (207) is installed on the both sides of the upper end of the bottom plate (205) on the both sides of the intermediate column (206), the intermediate column (206) is sleeved with the framework (203), and the copper wire (202) is wound on the framework (203), the width of the magnetic conducting frame (201) is D1, the length of the magnetic conducting frame (201) is D2, the middle part of the upper end of the vibration spring blade (101) is provided with an arc notch (102) on the left and right sides, the distance between the two arc notches (102) is D3, the upper end of the vibration spring blade (101) is provided with a through hole (103) on the front and back sides of the magnetic conducting frame (201), the distance between the two through holes (103) is D4, D1 is greater than or equal to D3, and D2 is greater than or equal to D4.

2. The magnetic attraction type electromagnet device of claim 1, wherein: The area of the upper end surface of the intermediate column (206) is A1, the areas of the upper end surfaces of the two side columns (207) are A2 and A3 respectively, A1 is greater than or equal to A2 plus A3, and A2 is equal to A3.

3. The magnetic attraction type electromagnet device of claim 1, wherein the magnetic attraction type electromagnet device further comprises a magnetic material layer formed on the surface of the magnetic material layer of the magnetic material layer assembly. The magnetic conducting frame (201) is made of precision casting and powder sintering.

4. The magnetic attraction type electromagnet device of claim 1, wherein: The vibration spring blade (101) is stamped from a whole piece of magnetic conducting material.

5. The magnetic attraction type electromagnet device of claim 1, wherein: The vibration spring blade (101) is in an L-shaped structure, and the lower end of the vibration spring blade (101) is inserted into the device base (300) and fixed by a bolt (303).

6. The magnetic attraction type electromagnet device of claim 1, wherein: The both ends of the copper wire (202) are respectively installed with a copper sheet (204).

7. The magnetic attraction type electromagnet device of claim 1, wherein: The distance between the magnetic conducting frame (201) and the vibration spring blade (101) is L1, the displacement of the vibration spring blade (101) after excitation is L2, and L1 is greater than L2.

8. The magnetic attraction type electromagnet device of claim 1, wherein: The front and back sides of the intermediate column (206) are respectively provided with a concave point (208), and the inside of the framework (203) is provided with a convex point (210) matched with the concave point (208).

9. The magnetic attraction type electromagnet device of claim 1, wherein: The inside of the upper part of the side column (207) is provided with a clamping groove (209), and the upper part and the lower part of the framework (203) are respectively provided with an upper baffle (211) and a lower baffle (212), and the upper baffle (211) is matched with the clamping groove (209).

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