A touch vibration feedback micro electromagnet device combined with a circuit board

Abstract

This invention relates to a miniature electromagnet device with tactile vibration feedback integrated with a circuit board, comprising a vibration source, a circuit board body, and a contact medium. The circuit board body includes a circuit board substrate, conductive lines, a connection medium, and vibration source contacts. The vibration source includes a frame, copper wires, a movable core, and a vibration source circuit board. The vibration source circuit board is fixed to the circuit board substrate via the vibration source contacts and the connection medium. The vibration source circuit board is connected to the conductive lines on the circuit board substrate. The frame, which is cylindrical, is wound with copper wires connected to the vibration source circuit board. A movable core, which can move up and down, is installed inside the frame, and the movable core has a contact medium on it. This invention effectively reduces noise and provides a vibration intensity superior to a vibration motor, while also being smaller and less expensive.

Description

Technical Field

[0001] This invention relates to the field of tactile feedback technology, and in particular to a miniature electromagnet device for touch vibration feedback combined with a circuit board. 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] As functionality and application scenarios increase, the core components of haptic feedback also need to strive towards miniaturization and integration. Taking new energy vehicles and automotive usage scenarios as examples, devices such as entertainment panels, seats, steering wheels, and window switches can all use haptic feedback devices, which is a diversified concept of haptic feedback. When multiple devices and products need to use haptic feedback, product space design problems will be encountered. How to combine and integrate multiple hardware into a single miniaturized vibration device will be a major challenge.

[0005] Patents CN212267386U and CN206294144U rely on vibration motors to achieve vibration feedback. Vibration motors have the following significant drawbacks: 1. Excessive noise; 2. Insufficient vibration force; 3. Higher cost compared to miniature electromagnets; 4. Short lifespan. Patent CN109976529A is a touch vibration device for automotive trim panels. It uses an electromagnet as the vibration driver. A force-sensing spring triggers the electromagnet, attracting and releasing the trim panel, causing rapid deformation and vibration. However, integrating the vibration device, control circuit board, and other wiring entirely within the panel limits functionality, resulting in issues such as a small electromagnet vibration travel distance and insufficient vibration energy. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a touch vibration feedback miniature electromagnet device combined with a circuit board, which effectively reduces noise and has a vibration intensity superior to that of a vibration motor, while being smaller in size and lower in cost.

[0007] The technical solution adopted by this invention to solve its technical problem is as follows: A micro electromagnet device with touch vibration feedback combined with a circuit board is provided, comprising a vibration source, a circuit board body, and a contact medium. The circuit board body includes a circuit board substrate, conductive lines, a connection medium, and vibration source contacts. The vibration source includes a frame, copper wires, a movable core, and a vibration source circuit board. The vibration source circuit board is fixed to the circuit board substrate through the vibration source contacts and the connection medium. The vibration source circuit board is connected to the conductive lines on the circuit board substrate. A frame, which is cylindrical, is provided on the vibration source circuit board. Copper wires connected to the vibration source circuit board are wound around the frame. A movable core that can move up and down is installed inside the frame. A contact medium is provided on the movable core, and the vibration source transmits vibration energy through the contact medium.

[0008] As a supplement to the technical solution described in this invention, an upper cover and a lower cover are respectively installed on the upper and lower sides of the skeleton, and the upper cover is provided with an assembly hole for cooperating with the movable core component.

[0009] As a supplement to the technical solution described in this invention, both the upper cover and the lower cover are made of excitation material.

[0010] As a supplement to the technical solution described in this invention, the vibration swing range of the movable core is h, the assembly gap between the movable core and the upper cover is d, and the distance between the inner wall of the skeleton and the side wall of the movable core is greater than the sum of h / 2 and d.

[0011] As a supplement to the technical solution described in this invention, a copper sheet connected to the vibration source circuit board is installed on each of the two sides of the lower end of the frame.

[0012] As a supplement to the technical solution described in this invention, each side of the vibration source circuit board has a spoon-shaped welding point, which is welded to the corresponding copper sheet.

[0013] As a supplement to the technical solution described in this invention, the lower part of the skeleton is provided with a routing groove for copper wires to run through. A skeleton fixing point is provided at the openings at both ends of the routing groove. The skeleton fixing point is cylindrical, and the end of the copper wire is wound around the skeleton fixing point.

[0014] As a supplement to the technical solution described in this invention, the vibration source circuit board is provided with multiple conductive positioning points around its perimeter, and each conductive positioning point has a semi-circular groove.

[0015] As a supplement to the technical solution described in this invention, the vibration source contact can be fixed to one or both sides of the circuit board substrate through a connecting medium, while being connected to the conductive lines.

[0016] As a supplement to the technical solution described in this invention, the material of the movable core is a ferrite magnet or a permanent magnet.

[0017] Beneficial Effects: This invention relates to a miniature electromagnet device with touch vibration feedback integrated with a circuit board. It effectively reduces noise and provides vibration intensity superior to a vibration motor, while also being smaller and less expensive. This invention directly solders the electromagnet onto a vibration source circuit board, which serves as the electromagnet's base and provides positioning functionality. This also reduces the need for connectors and wiring, making it applicable to products such as new energy vehicles, automobiles, and virtual reality devices. 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 vibration source described in this invention;

[0020] Figure 3 This is a cross-sectional view of the vibration source described in this invention;

[0021] Figure 4 This is an internal schematic diagram of the vibration source described in this invention;

[0022] Figure 5 This is a left view of the skeleton described in this invention;

[0023] Figure 6 This is a partial schematic diagram of the skeleton described in this invention;

[0024] Figure 7 This is a schematic diagram of the structure of the vibration source circuit board described in this invention.

[0025] Illustration: 101, Circuit board substrate; 102, Conductive line; 103, Connection medium; 104, Vibration source; 105, Contact medium; 106, Vibration source contact point; 201, Frame; 202, Copper sheet; 203, Copper wire; 204, Top cover; 205, Bottom cover; 206, Movable core component; 207, Vibration source circuit board; 301, Frame fixing point; 302, Wiring groove; 401, Spoon-shaped solder point; 402, Conductive positioning point. Detailed Implementation

[0026] 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.

[0027] Embodiments of the present invention relate to a touch vibration feedback miniature electromagnet device combined with a circuit board, such as... Figure 1-7 As shown, the device comprises three main parts: a vibration source 104, a circuit board body, and a contact medium 105. The circuit board body includes a circuit board substrate 101, conductive lines 102, a connection medium 103, and vibration source contacts 106. The vibration source 104 is an electromagnet structure, comprising a frame 201, copper wires 203, a movable core 206, and a vibration source circuit board 207. The vibration source circuit board 207 is fixed to the circuit board substrate 104 via the vibration source contacts 106 and the connection medium 103. On 01, the vibration source circuit board 207 is connected to the conductive line 102 provided on the circuit board substrate 101. The vibration source circuit board 207 is provided with a skeleton 201, which is cylindrical. The skeleton 201 is wound with copper wire 203 connected to the vibration source circuit board 207. The skeleton 201 is equipped with a movable core 206 that can be raised and lowered. The movable core 206 is provided with a contact medium 105. The vibration source 104 transmits vibration energy through the contact medium 105.

[0028] The upper and lower sides of the frame 201 are respectively equipped with an upper cover 204 and a lower cover 205. The upper cover 204 has an assembly hole that mates with the movable core 206. Both the upper cover 204 and the lower cover 205 are made of excitation material.

[0029] The vibration source contact 106 can be fixed to one or both sides of the circuit board substrate 101 through the connecting medium 103, and is connected to the conductive line 102.

[0030] The frame 201 has a copper sheet 202 on each side of its lower end, which is connected to the vibration source circuit board 207. The frame 201 and the copper sheet 202 are integrally molded using a plastic coating method, or the copper sheet 202 can be assembled using a hinge method. Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, as a preferred option, the skeleton 201 is wrapped with copper wire 203, which runs through the wiring groove 302 opened on the skeleton 201. The end of the copper wire 203 is wrapped around the skeleton fixing point 301 to prevent the copper wire 203 from falling off.

[0031] Running the copper wire 203 through the wiring groove 302 helps to make the copper wire 203 neat and flat, and makes it easier to control the change of impedance value. The copper wire 203 is routed to the frame fixing point 301 and wound around it. The wiring groove 302 is useful as a fixing point before and after winding. The starting point is used to prevent the copper wire 203 from shifting and shaking, making the winding neat. The ending point is used to neatly wind the copper wire 203 without loose loops.

[0032] The copper wire 203 and the copper sheet 202 are fixed and electrically connected by welding. After the copper wire 203 and the copper sheet 202 are welded, the fixed winding point is cut off to avoid interference when the copper sheet 202 is welded to the vibration source circuit board 207. Figure 7 As shown, there is a spoon-shaped solder point 401 on each of the left and right sides of the vibration source circuit board 207. The spoon-shaped solder point 401 is soldered to the corresponding copper sheet 202, which reduces the use of wires and reduces the size. The spoon-shaped design of the spoon-shaped solder point 401 can be used with conductive posts or any wires for soldering to achieve the effect of energizing and magnetizing. There are also three conductive positioning points 402 around the perimeter of the vibration source circuit board 207. The conductive positioning points 402 have semi-circular grooves, which can be used to position and conduct relevant sensing components.

[0033] The movable core 206 is made of either a ferrite magnet (soft magnetic material) or a permanent magnet (hard magnetic material). Preferably, the movable core 206 is made of a permanent magnet to enhance the generation of electromagnetic force. The grade, material, and size of the permanent magnet, as well as the gap between the frame 201 and the movable core 206, affect the strength of the electromagnetic force before and after excitation. Using excitation materials for the upper cover 204 and lower cover 205 can effectively enhance the electromagnetic force. A linear and stable output force can be achieved using a rated current power supply. The output force is calculated by subtracting the magnetizing force from the excitation force.

[0034] The movable core 206 opens the gap between itself and other parts such as the frame 201, effectively preventing noise and abnormal sounds caused by vibration and impact on the lower side, while also eliminating the impact of contact friction on the overall output performance.

[0035] When the positive and negative poles of the coil 203 and the copper sheet 202 are switched, electromagnetic forces are generated to attract and repel each other, causing the movable core 206 to move up and down. By rapidly switching the positive and negative poles at a high frequency, continuous vibration can be generated, thus realizing the vibration feedback force.

[0036] To avoid collisions and damage, the vibration swing range of the movable core 206 is h, the assembly gap between the movable core 206 and the upper cover 204 is d, and the distance between the inner wall of the skeleton 201 and the side wall of the movable core 206 is greater than the sum of h / 2 and d.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] The present application provides a detailed description of a touch vibration feedback micro electromagnet device combined with a circuit board. Specific examples have been used to illustrate the principle and implementation of the present application. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​the present 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 ​​the present application. Therefore, the content of this specification should not be construed as a limitation of the present application.

Claims

1. A miniature electromagnet device with touch vibration feedback integrated with a circuit board, characterized in that: The device includes a vibration source (104), a circuit board body, and a contact medium (105). The circuit board body includes a circuit board substrate (101), conductive lines (102), a connection medium (103), and vibration source contacts (106). The vibration source (104) includes a frame (201), copper wires (203), a movable core (206), and a vibration source circuit board (207). The vibration source circuit board (207) is fixed to the circuit board substrate (101) through the vibration source contacts (106) and the connection medium (103). The vibration source circuit board (207) is connected to the conductive lines (102) on the circuit board substrate (101). The vibration source circuit board (207) has a frame (201) on it. The frame (201) is cylindrical. Copper wires (203) connected to the vibration source circuit board (207) are wound around the frame (201). A movable core that can be raised and lowered is installed inside the frame (201). 206), the movable core (206) is provided with a contact medium (105), and the vibration source (104) transmits vibration energy through the contact medium (105); a copper sheet (202) connected to the vibration source circuit board (207) is installed on each side of the lower end of the frame (201); a spoon-shaped welding point (401) is provided on each side of the vibration source circuit board (207), and the spoon-shaped welding point (401) is welded to the corresponding copper sheet (202); the frame The lower part of the frame (201) is provided with a wiring groove (302) for the copper wire (203) to run. A skeleton fixing point (301) is provided at the opening at both ends of the wiring groove (302). The skeleton fixing point (301) is cylindrical, and the end of the copper wire (203) is wrapped around the skeleton fixing point (301). The vibration source circuit board (207) has multiple conductive positioning points (402) around its perimeter. Each conductive positioning point (402) has a semi-circular groove.

2. The touch-shock feedback micro electromagnet device integrated with a circuit board according to claim 1, wherein: The upper and lower sides of the frame (201) are respectively equipped with an upper cover (204) and a lower cover (205). The upper cover (204) has an assembly hole that mates with the movable core (206).

3. The tactile vibration feedback micro electromagnet device integrated with a circuit board according to claim 2, wherein: Both the upper cover (204) and the lower cover (205) are made of excitation material.

4. The tactile vibration feedback micro electromagnet device integrated with a circuit board according to claim 2, wherein: The vibration swing range of the movable core (206) is h, the assembly gap between the movable core (206) and the upper cover (204) is d, and the distance between the inner wall of the skeleton (201) and the side wall of the movable core (206) is greater than the sum of h / 2 and d.

5. A touch vibration feedback miniature electromagnet device combined with a circuit board according to claim 1, characterized in that: The vibration source contact (106) can be fixed to one or both sides of the circuit board substrate (101) through a connecting medium (103) and connected to the conductive line (102).

6. A touch vibration feedback miniature electromagnet device combined with a circuit board according to claim 1, characterized in that: The movable core (206) is made of ferrite magnet or permanent magnet.

Images