Elastic sheet type linear motor with stable damping

Abstract

The utility model discloses an elastic sheet type linear motor with stable damping, which comprises a lower bracket, the upper part of the lower bracket is connected with a casing, the upper surface of the lower bracket is connected with an FPC, the upper part of the FPC is connected with a coil, the casing is internally provided with a mass block, the interior of the mass block is connected with magnetic steel, and the mass block is respectively connected with the casing and the lower bracket through elastic sheets. Damping glue is arranged at the joint of the fixed end of the elastic piece and the cantilever. According to the utility model, the connecting part of the fixed end of the elastic sheet and the cantilever is coated with the damping glue, so that the fixed end of the elastic sheet and the cantilever are both provided with the damping glue, a damping effect is provided for the motor, and the defects of magnetic fluid damping and foam damping are avoided; according to the utility model, the bosses corresponding to the fixed ends of the elastic sheets are arranged on the casing and the lower bracket, so that welding surfaces are provided for the elastic sheets, and the welding of the elastic sheets is more convenient.

Description

Technical Field

[0001] This utility model belongs to the field of linear motor technology, specifically relating to a damped and stable spring-type linear motor. Background Technology

[0002] Haptic feedback devices are currently widely used in consumer electronics (such as mobile phones, tablets, etc.), automobiles, and medical equipment. They generally use vibration motors as system feedback components, such as incoming call notifications on mobile phones and vibration feedback in game consoles.

[0003] Compared to traditional rotor motors, linear motors have significant advantages in vibration characteristics, response time, lifespan, and noise. Current linear motors typically use magnetic fluid or foam to provide damping, but this method has the following drawbacks:

[0004] 1. For magnetic fluid damping, the amount of damping provided by magnetic fluid damping is greatly affected by temperature, and the motor performance will change with temperature.

[0005] 2. Regarding foam damping, due to the porous structure of foam, when the motor is in a high humidity environment, the damping foam will absorb water, causing the spring to corrode and thus affecting the service life of the motor. Utility Model Content

[0006] The purpose of this invention is to provide a damping-stable spring-loaded linear motor to solve the problems mentioned in the background art. The damping-stable spring-loaded linear motor provided by this invention effectively provides stable damping while avoiding the drawbacks of magnetic fluid damping and foam damping.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a damped and stable spring-loaded linear motor, including a lower bracket, a housing connected to the upper part of the lower bracket, an FPC connected to the upper surface of the lower bracket, a coil connected to the upper part of the FPC, a mass block provided inside the housing, a magnet connected inside the mass block, the mass block being connected to the housing and the lower bracket respectively through spring plates, and damping rubber provided at the fixed end of the spring plate and the cantilever connection.

[0008] To provide damping for the motor, damping adhesive is further provided on the upper and / or lower surfaces of the spring sheet.

[0009] In order to provide a welding surface for the spring and make the welding of the spring more convenient, the housing and the lower bracket are further provided with bosses corresponding to the fixed end of the spring.

[0010] To provide a support platform and a storage platform for excess adhesive for bonding the magnet to the mass block, a corresponding pad is attached to the bottom surface of the mass block.

[0011] In order to guide the magnetic field lines, increase the utilization rate of the magnetic field, and thus increase the driving force of the motor, a yoke is further connected above the coil.

[0012] In order to give the coil a large inductance and ensure that it generates a large magnetic flux and a large driving force when the coil is energized, an iron core is further provided inside the coil.

[0013] To avoid the structure of coils and reduce the cost of the spring, the cantilever of the spring is further provided with a hollow groove.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model applies damping adhesive to the fixed end of the spring sheet and the cantilever connection, so that damping adhesive is present on both the fixed end of the spring sheet and the cantilever, providing damping effect for the motor and avoiding the drawbacks of magnetic fluid damping and foam damping.

[0016] 2. The housing and lower bracket of this utility model are provided with protrusions corresponding to the fixed end of the spring sheet, providing a welding surface for the spring sheet and making the welding of the spring sheet more convenient.

[0017] 3. The bottom surface of the mass block of this utility model is laser-welded with a pad corresponding to the magnet, which provides a support platform and a glue storage platform for bonding the magnet and the mass block.

[0018] 4. The spring sheet of this utility model has a hollowed-out groove on its cantilever, which serves to avoid structures such as coils and reduces the cost of the spring sheet. Attached Figure Description

[0019] Figure 1 This is an exploded view of the structure of this utility model;

[0020] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0021] Figure 3 This is a schematic diagram of the connection between the coil and the lower bracket of this utility model;

[0022] Figure 4 This is a schematic diagram of the connection between the magnet and the mass block in this utility model.

[0023] In the diagram: 1. Housing; 2. Damping rubber; 3. Mass block; 4. Yoke; 5. Coil; 6. Lower bracket; 7. FPC; 8. Iron core; 9. Gasket; 10. Magnet; 11. Spring; 12. Boss. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1

[0026] Please see Figures 1-4 The present invention provides the following technical solution: a damped and stable spring-loaded linear motor, including a housing 1 and a lower bracket 6. The housing 1 is laser-welded to the upper part of the lower bracket 6. An FPC 7 is bonded to the upper surface of the lower bracket 6 with adhesive. A coil 5 is connected to the upper part of the FPC 7. The coil 5 is connected to the circuit of the FPC 7 by electronic spot welding technology. A mass block 3 is provided inside the housing 1. A magnet 10 is bonded to the inside of the mass block 3 with adhesive. The mass block 3 is connected to the housing 1 and the lower bracket 6 respectively by spring pieces 11. The spring pieces 11 are laser-welded to the housing 1, the mass block 3 and the lower bracket 6 respectively. The fixed end and the cantilever connection of the spring pieces 11 are coated with damping adhesive 2.

[0027] By adopting the above technical solution, the present invention coats the fixed end of the spring piece 11 and the cantilever connection with damping adhesive 2, so that damping adhesive exists on both the fixed end of the spring piece 11 and the cantilever, providing damping effect for the motor and avoiding the drawbacks of magnetic fluid damping and foam damping.

[0028] Specifically, the upper surface of the spring piece 11 connected to the housing 1 is provided with damping rubber, and the lower surface of the spring piece 11 connected to the lower bracket 6 is provided with damping rubber.

[0029] By adopting the above technical solution, a damping effect is provided for the motor.

[0030] Specifically, both the housing 1 and the lower bracket 6 are provided with protrusions 12 corresponding to the fixed end of the spring 11.

[0031] By adopting the above technical solution, a welding surface is provided for the spring 11, making the welding of the spring 11 more convenient.

[0032] Specifically, the bottom surface of mass block 3 is laser-welded with a pad 9 corresponding to magnet 10.

[0033] By adopting the above technical solution, a support platform and a glue storage platform are provided for bonding the magnet 10 and the mass block 3.

[0034] Specifically, a yoke 4 is glued to the top of coil 5.

[0035] By adopting the above technical solution, the magnetic field lines are guided, the utilization rate of the magnetic field is increased, thereby increasing the driving force of the motor.

[0036] Specifically, the coil 5 has an iron core 8 inside, which is laser-welded to the lower bracket 6.

[0037] By adopting the above technical solution, the coil 5 has a large inductance, which ensures that the coil 5 generates a large magnetic flux and a large driving force when energized.

[0038] Example 2

[0039] The difference between this embodiment and embodiment 1 is that, specifically, the damping adhesive 2 is disposed on the upper and lower surfaces of the spring sheet 11.

[0040] By adopting the above technical solution, a damping effect is provided for the motor.

[0041] Example 3

[0042] The difference between this embodiment and embodiment 1 is that, specifically, the cantilever of the spring piece 11 is provided with a hollow groove.

[0043] By adopting the above technical solution, on the one hand, it can avoid structures such as coil 5, and on the other hand, it can reduce the cost of spring 11.

[0044] In summary, this invention coats the fixed end of the spring piece 11 and the cantilever connection with damping adhesive 2, ensuring damping adhesive on both the fixed end and the cantilever of the spring piece 11, providing damping for the motor and avoiding the drawbacks of magnetic fluid damping and foam damping. The housing 1 and lower bracket 6 of this invention are provided with protrusions 12 corresponding to the fixed end of the spring piece 11, providing a welding surface for the spring piece 11 and making welding easier. The bottom surface of the mass block 3 of this invention is laser-welded with a pad 9 corresponding to the magnet 10, providing a support platform for bonding the magnet 10 to the mass block 3 and a storage platform for excess adhesive. The cantilever of the spring piece 11 of this invention has a hollowed-out groove, which serves two purposes: firstly, to avoid structures such as the coil 5, and secondly, to reduce the cost of the spring piece 11.

[0045] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A damped, stabilized spring-loaded linear motor, characterized in that: It includes a lower bracket, with a housing connected to the top of the lower bracket. An FPC is connected to the upper surface of the lower bracket, and a coil is connected to the top of the FPC. A mass block is provided inside the housing, and a magnet is connected inside the mass block. The mass block is connected to the housing and the lower bracket respectively through spring sheets. Damping rubber is provided at the fixed end of the spring sheet and the cantilever connection.

2. The damped and stabilized spring-loaded linear motor according to claim 1, characterized in that: The damping adhesive is disposed on the upper and / or lower surface of the spring sheet.

3. The damped and stabilized spring-loaded linear motor according to claim 1, characterized in that: Both the housing and the lower bracket are provided with protrusions corresponding to the fixed end of the spring clip.

4. A damped and stabilized spring-loaded linear motor according to claim 1, characterized in that: The bottom surface of the mass block is connected to a pad corresponding to the magnet.

5. A damped, stabilized spring-loaded linear motor according to claim 1, characterized in that: A yoke is connected above the coil.

6. A damped, stabilized spring-loaded linear motor according to claim 1, characterized in that: The coil has an iron core inside.

7. A damped, stabilized spring-loaded linear motor according to claim 1, characterized in that: The cantilever of the spring is provided with a hollowed-out groove.

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