Electromagnetic excitation device
By designing electromagnetic excitation devices, using the electromagnetic suction force of the coil and the core to vibrate on the spring, the problem that traditional vibration motors cannot achieve the individual vibration of the physical buttons is solved, providing better tactile feedback and reduced production costs.
Patent Information
- Application Number
- CN202420170702.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-24
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-01-24
AI Technical Summary
Traditional vibrating motors cannot achieve separate vibrations of the physical buttons of electronic products, resulting in the inability to provide real tactile feedback.
Design an electromagnetic excitation device, including a casing, spring sheet, FPC board, stator assembly and counterweight block, generate electromagnetic suction through the coil to vibrate on the iron core, realize the individual vibration sense of the button, and increase the weight and Stable frequency.
The individual vibration sense of the physical buttons of electronic products is realized, which reduces production costs, improves the tactile quality, and improves the reliability of coil power-up and the controllability of glue bonding.
Smart Images
Figure CN222356176U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of electromagnetic exciters, and in particular relates to an electromagnetic excitation device. Background Art
[0002] Electronic products such as mobile phones, tablet computers or handheld game consoles usually have vibration motors inside to provide tactile feedback to users.
[0003] Currently, mobile consumer electronic products on the market generally use vibration motors as system feedback components, such as incoming call notifications on mobile phones, vibration feedback on game consoles, etc.
[0004] However, the traditional vibration motor drives the entire consumer electronic product such as a mobile phone or tablet to vibrate, and the overall vibration enhances the vibration sensation externally. This mode cannot achieve the individual vibration of the physical buttons (side buttons) on the electronic product.
[0005] Therefore, there is an urgent need for an electromagnetic excitation device that can provide a separate vibration sense to the physical key, and will not cause the entire electronic product to vibrate when vibrating, so as to achieve a real touch of the key. Utility Model Content
[0006] In order to solve the problems raised in the above background technology, the utility model provides an electromagnetic excitation device, which has the characteristics of providing a separate vibration sense to a physical key, and will not drive the entire electronic product to vibrate when vibrating, thus achieving a real touch of the key.
[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an electromagnetic excitation device, comprising a housing, a spring sheet and an FPC board, wherein both ends of the spring sheet are connected to the housing, a gasket is connected to one side of the housing located on the spring sheet, a stator assembly is connected to the side of the gasket close to the spring sheet, the stator assembly comprises a coil, a first iron core is connected to the side of the spring sheet close to the stator assembly, and the FPC board comprises a pressure-sensing connection part and a coil connection part, wherein the pressure-sensing connection part is connected to the spring sheet, and the coil connection part is connected to the coil.
[0008] In order to increase the weight and thus provide an excellent touch, in addition, the spring sheet is sandwiched between the first iron core so that the boundary condition of the spring sheet is stable, thereby ensuring a stable frequency. Further, a counterweight block is connected to the other side of the spring sheet.
[0009] In order to provide a bonding surface for the coil and increase the driving force to ensure vibration, the stator assembly further includes a lower bracket, wherein the coil is arranged inside the lower bracket, and the lower bracket is a magnetic conductive component.
[0010] In order to increase the driving force and ensure the vibration sense, further, a second iron core penetrating the lower bracket is provided inside the coil.
[0011] In order to enable the gasket to be stamped and formed, thereby effectively reducing the production cost, the gasket further includes a first gasket and a second gasket, wherein the first gasket is connected to one side of the second gasket.
[0012] In order to allow the second iron core to pass through the second gasket and contact the first gasket, the first gasket provides a bonding surface for the second iron core, and further, a through groove is provided on the second gasket.
[0013] In order to provide an area for glue overflow and increase the feasibility and stability of glue control, further, the width of the second gasket is smaller than that of the first gasket.
[0014] Compared with the prior art, the beneficial effects of the utility model are:
[0015] 1. The utility model is installed on the middle frame by screws, and the key cap is installed on the spring sheet. In the working state, when the key cap is pressed, the pressure sensor on the pressure sensing connection part generates a signal, so that the coil is energized to generate a periodic electromagnetic attraction to the first iron core, thereby providing a separate vibration sense to the physical key;
[0016] 2. The utility model generates periodic electromagnetic attraction by energizing the coil, which acts on the first iron core, and reciprocates under the action of the spring sheet, without the need for permanent magnets, thereby effectively reducing production costs;
[0017] 3. The coil of the utility model is located on the stator assembly and does not participate in the movement, which greatly increases the reliability of the coil power supply;
[0018] 4. When the utility model is used, the finger needs to press the key cap, which plays a damping role, thereby achieving the effect of quick start and stop;
[0019] 5. The pressure-sensing connection part and the coil connection part of the utility model are designed on one FPC board, which makes the process more convenient, stable and reliable;
[0020] 6. The utility model increases the weight by the counterweight block, thereby providing an excellent touch. In addition, the counterweight block and the first iron core sandwich the spring sheet in the middle, so that the boundary conditions of the spring sheet are stable, thereby ensuring a stable frequency;
[0021] 7. The utility model divides the gasket into a first gasket and a second gasket. The first gasket and the second gasket are bonded by glue, so that the gasket can be stamped and formed, thereby effectively reducing the production cost;
[0022] 8. The width of the second gasket of the utility model is smaller than that of the first gasket, so that there is an area of glue overflow when the lower bracket or the first gasket is bonded to the second gasket, which increases the feasibility and stability of glue control, makes the glue bonding more reliable and controlled, and does not affect the subsequent welding process of the first gasket and the casing. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:
[0024] Figure 1 It is a schematic diagram of the explosion of the structure of the utility model;
[0025] Figure 2 It is a schematic diagram of the structure of the utility model;
[0026] Figure 3 It is a structural schematic diagram of the spring sheet of the utility model;
[0027] Figure 4 It is a structural schematic diagram of the stator assembly of the utility model;
[0028] Figure 5 It is a structural schematic diagram of the gasket of the utility model;
[0029] Figure 6 This is a schematic diagram of the structure of the FPC board of the utility model;
[0030] Figure 7 It is a cross-sectional structural schematic diagram of the utility model;
[0031] Figure 8 It is a cross-sectional structural schematic diagram of the connection between the stator assembly and the gasket of the utility model;
[0032] Fig. 9 It is a schematic diagram of the structure of the utility model connected with the middle frame;
[0033] Fig.10 This is a schematic diagram of a structure connected to a middle frame in another embodiment of the utility model;
[0034] In the figure: 1. housing; 2. spring sheet; 21. counterweight; 22. first iron core; 3. gasket; 31. first gasket; 32. second gasket; 33. through slot; 4. FPC board; 41. pressure-sensitive connection part; 42. coil connection part; 5. stator assembly; 51. lower bracket; 52. second iron core; 53. coil; 6. middle frame; 7. keycap. DETAILED DESCRIPTION
[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0036] Example 1
[0037] See also Figure 1-9 The utility model provides the following technical solutions: an electromagnetic excitation device, including a housing 1, a spring sheet 2 and an FPC board 4, wherein both ends of the spring sheet 2 are welded to the housing 1, a gasket 3 is connected to one side of the housing 1 located on the spring sheet 2, a stator assembly 5 is connected to the side of the gasket 3 close to the spring sheet 2, the stator assembly 5 includes a coil 53, a first iron core 22 is welded to the side of the spring sheet 2 close to the stator assembly 5 by laser, the FPC board 4 includes a pressure-sensing connection part 41 and a coil connection part 42, wherein the pressure-sensing connection part 41 is bonded to the cantilever of the spring sheet 2, a pressure-sensing sensor is connected to the pressure-sensing connection part 41, and the coil connection part 42 is connected to the coil 53.
[0038] By adopting the above technical scheme, the utility model is installed on the middle frame 6 by screws, and the keycap 7 is installed on the spring sheet 2. In the working state, when the keycap 7 is pressed, the pressure sensor on the pressure-sensitive connecting part 41 generates a signal, so that the coil 53 is energized (AC or pulsed electricity) to generate a periodic electromagnetic attraction to the first iron core 22, thereby providing a separate vibration sense for the physical key; the utility model generates a periodic electromagnetic attraction by energizing the coil 53, which acts on the first iron core 22, and reciprocates under the action of the spring sheet 2, without the need to use a permanent magnet, thereby effectively reducing the production cost; the coil 53 of the utility model is located on the stator assembly 5 and does not participate in the movement, so that the reliability of the coil 53 being energized is greatly increased; when the utility model is in use, because the finger needs to press the keycap 7, it plays a damping role, thereby achieving the effect of quick start and stop; the pressure-sensitive connecting part 41 and the coil connecting part 42 of the utility model are designed on an FPC board 4, and the process is more convenient, stable and reliable.
[0039] Specifically, a counterweight block 21 is welded on the other side of the spring sheet 2 by laser welding. The counterweight block 21 is a plate or a powder metallurgy part. In this embodiment, a plate is preferred.
[0040] By adopting the above technical solution, the weight is increased by the counterweight block 21, thereby providing an excellent touch. In addition, the counterweight block 21 and the first iron core 22 sandwich the spring sheet 2, so that the boundary conditions of the spring sheet 2 are stable, thereby ensuring a stable frequency.
[0041] Specifically, the stator assembly 5 further includes a lower bracket 51 , wherein the coil 53 is arranged inside the lower bracket 51 , and the lower bracket 51 is a magnetic conductive component.
[0042] By adopting the above technical solution, a bonding surface is provided for the coil 53, and at the same time, the driving force can be increased to ensure the vibration feeling.
[0043] Specifically, a second iron core 52 penetrating the lower bracket 51 is disposed inside the coil 53 .
[0044] The above technical solution is adopted to increase driving force and ensure vibration feeling.
[0045] Example 2
[0046] The present embodiment is different from the first embodiment in that: specifically, the gasket 3 includes a first gasket 31 and a second gasket 32 , wherein the first gasket 31 is connected to one side of the second gasket 32 .
[0047] By adopting the above technical solution, the gasket 3 is divided into a first gasket 31 and a second gasket 32. The first gasket 31 and the second gasket 32 are bonded by glue (or laser welding), so that the gasket 3 can be stamped and formed, thereby effectively reducing the production cost.
[0048] Specifically, a through groove 33 is provided on the second gasket 32 .
[0049] By adopting the above technical solution, the second iron core 52 can pass through the second gasket 32 and contact the first gasket 31 , and the first gasket 31 provides a bonding surface (or welding surface) for the second iron core 52 .
[0050] Specifically, the width of the second gasket 32 is smaller than the width of the first gasket 31 .
[0051] By adopting the above technical solution, there is an area where glue overflows when the lower bracket 51 or the first gasket 31 is bonded to the second gasket 32, which increases the feasibility and stability of glue control, makes the glue bonding more reliable and controlled, and does not affect the subsequent welding process of the first gasket 31 and the casing 1.
[0052] Example 3
[0053] See also Fig.10 The difference between this embodiment and the first embodiment is that: specifically, the counterweight block 21 is directly used as a key, so there is no need to add additional keycaps, thereby reducing costs.
[0054] In summary, the utility model is installed on the middle frame 6 by screws, and the keycap 7 is installed on the spring sheet 2. In the working state, when the keycap 7 is pressed, the pressure sensor on the pressure-sensitive connecting part 41 generates a signal, so that the coil 53 is energized (AC or pulsed electricity) to generate a periodic electromagnetic attraction to the first iron core 22, thereby providing a separate vibration sense for the physical key; the utility model generates a periodic electromagnetic attraction by energizing the coil 53, which acts on the first iron core 22, and reciprocates under the action of the spring sheet 2, without the need to use permanent magnets, thereby effectively reducing the production cost; the coil 53 of the utility model is located on the stator assembly 5 and does not participate in the movement, so that the reliability of the coil 53 being energized is greatly increased; when in use, the utility model needs to press the keycap 7 with a finger, thereby playing a damping role, thereby achieving the effect of quick start and stop; the pressure-sensitive connection of the utility model The part 41 and the coil connecting part 42 are designed on an FPC board 4, and the process is more convenient, stable and reliable; the utility model increases the weight by the counterweight block 21, thereby providing an excellent touch. In addition, the counterweight block 21 and the first iron core 22 sandwich the spring sheet 2 in the middle, so that the boundary condition of the spring sheet 2 is stable, thereby ensuring a stable frequency; the utility model divides the gasket 3 into a first gasket 31 and a second gasket 32, and the first gasket 31 and the second gasket 32 are bonded by glue, so that the gasket 3 can be stamped and formed, thereby effectively reducing the production cost; the width of the second gasket 32 of the utility model is smaller than that of the first gasket 31, so that there is an area of glue overflow when the lower bracket 51 or the first gasket 31 and the second gasket 32 are bonded, which increases the feasibility and stability of glue control, makes the glue bonding more reliable and controlled, and does not affect the subsequent welding process of the first gasket 31 and the casing 1.
[0055] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. An electromagnetic excitation device, characterized in that: It includes a casing, a spring sheet and an FPC board, wherein both ends of the spring sheet are connected to the casing, a gasket is connected to one side of the casing located on the spring sheet, a side of the gasket close to the spring sheet is connected to a stator assembly, the stator assembly includes a coil, a side of the spring sheet close to the stator assembly is connected to a first iron core, and the FPC board includes a pressure-sensing connection part and a coil connection part, wherein the pressure-sensing connection part is connected to the spring sheet, and the coil connection part is connected to the coil.
2. An electromagnetic excitation device according to claim 1, characterized in that: The other side of the spring sheet is connected with a counterweight block.
3. The electromagnetic excitation device according to claim 1, characterized in that: The stator assembly further comprises a lower bracket, wherein the coil is arranged inside the lower bracket, and the lower bracket is a magnetic conductive component.
4. The electromagnetic excitation device according to claim 1, characterized in that: A second iron core is arranged inside the coil.
5. The electromagnetic excitation device according to claim 1, characterized in that: The gasket includes a first gasket and a second gasket, wherein the first gasket is connected to one side of the second gasket.
6. An electromagnetic excitation device according to claim 5, characterized in that: The second gasket is provided with a through groove.
7. The electromagnetic excitation device according to claim 5, characterized in that: The width of the second gasket is smaller than the width of the first gasket.