Ultrathin tactile feedback linear motor

Abstract

The utility model relates to the technical field of linear motors, in particular to an ultra-thin tactile feedback linear motor, which comprises a mounting shell with a cavity inside; the vibration block is arranged in the mounting shell; a first magnet is fixedly arranged on the vibration block, and one pole end of the first magnet faces upwards; the two coils are fixedly installed in the installation shell and located on the two sides of the upper portion of the first magnet respectively. One end of the coil faces downwards; the polarities of the two coil pole ends are opposite; the elastic sheet is arranged in the mounting shell; the elastic sheet comprises two connecting strips, a plurality of fixing strips, a plurality of deformation strips and two vibration strips; the two connecting strips are located on the two sides of the vibration block. The middle section of the fixing strip is fixedly mounted on the mounting shell, and two ends are respectively connected with the two connecting strips; the middle section of the deformation strip is fixedly connected with the vibration block, and two ends are respectively connected with the two connecting strips; one end of each vibration strip is connected with one connecting strip, and the other end of each vibration strip swings freely. According to the utility model, the vibration feedback of the thin linear motor can be effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to linear motor technical field especially relates to a kind of ultra-thin tactile feedback linear motor. BACKGROUND

[0002] Due to the display screen virtual button has the advantages such as saving space, it is convenient to unify dispatch, virtual button replaces traditional entity button more and more in industry, automobile and many fields. Unlike entity button has obvious operation hand feeling, virtual button cannot give operator direct feedback when using alone, so it is usually needed to cooperate linear motor, and operator is brought feedback by the vibration of linear motor when virtual button is pressed. Linear motor needs to be as thin as possible, but if the existing linear motor structure is used, then thinner linear motor will lead to the vibration piece in it to be light and small, lead to vibration amplitude to be too small, and the vibration of linear motor is not intense, and feedback effect is poor. SUMMARY

[0003] The utility model provides a kind of ultra-thin tactile feedback linear motor, can effectively solve the problem in background art.

[0004] The utility model provides a kind of ultra-thin tactile feedback linear motor, it includes:

[0005] Mounting shell, inside is cavity;

[0006] Vibration block, is set in mounting shell;First magnet is fixedly arranged on vibration block, and one pole end of first magnet is upwards;

[0007] Two coils, fixedly installed in mounting shell, and located at the upper side of first magnet respectively;One pole end of coil is downwards;The pole end polarity of two coils is opposite;

[0008] Elastic sheet, is set in mounting shell;Elastic sheet includes two connecting strips, several fixed strips, several deformation strips and two vibration strips;

[0009] Two connecting strips are located at the two sides of vibration block;

[0010] Fixed strip middle section is fixedly installed on mounting shell, and two ends are connected with two connecting strips respectively;

[0011] The middle section of deformation strip is fixedly connected with vibration block, and two ends are connected with two connecting strips respectively;

[0012] One end of each vibration strip is connected with a connecting strip, and the other end is in free swing state.

[0013] Further, the two ends of fixed strip are provided with first vertical section and first horizontal section;The two ends of deformation strip are provided with second vertical section and second horizontal section;First horizontal section and second horizontal section are connected with connecting strip.

[0014] Furthermore, the first vertical segment and the second vertical segment are aligned; the first horizontal segment and the second horizontal segment are aligned.

[0015] Furthermore, a counterweight is fixedly installed at the free end of each vibrating bar.

[0016] Furthermore, the free end of each vibrating bar is bent to form a groove, and a counterweight is placed in the groove.

[0017] Furthermore, the side of the counterweight is provided with a vertical groove, into which the free end of the vibrating bar extends.

[0018] Furthermore, two second magnets are fixedly installed on the vibrating block; the two second magnets are located on both sides of the first magnet; one end of the second magnet faces upward and its polarity is opposite to that of the upward-facing end of the first magnet; each coil is located between the second magnet and the first magnet.

[0019] Furthermore, a through groove is provided at the center of the end of the vibrating bar that connects to the connecting bar.

[0020] Furthermore, the top of the vibrating block is a hollow structure.

[0021] Furthermore, a raised mounting strip is provided on the bottom surface inside the mounting housing for fixed connection with the fixing strip.

[0022] The following technical effects can be achieved through the technical solution of this utility model:

[0023] This linear motor utilizes a special elastic plate design. Through the interaction of connecting strips, fixing strips, and deformable strips within the elastic plate, the movement distance of the vibrating block is effectively increased. Furthermore, the vibration strips add additional vibration, thereby significantly improving the vibration feedback of the linear motor while maintaining a relatively thin structural thickness. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a structural exploded view of the ultra-thin haptic feedback linear motor in this utility model;

[0026] Figure 2 This is a cross-sectional view of the ultra-thin haptic feedback linear motor in this utility model;

[0027] Figure 3 This is a schematic diagram of the elastic sheet in this utility model;

[0028] Figure 4 This is a top view of the elastic sheet in this utility model;

[0029] Figure 5 for Figure 4 Sectional view at point A;

[0030] Figure 6 for Figure 4 Sectional view at point B;

[0031] Figure 7 for Figure 4 Sectional view at point C;

[0032] Figure 8 A schematic diagram of the principle of the ultra-thin haptic feedback linear motor in this utility model.

[0033] Reference numerals: 1. Mounting shell; 11. Mounting strip; 2. Vibrating block; 3. First magnet; 4. Coil; 5. Elastic sheet; 51. Connecting strip; 52. Fixing strip; 521. First vertical section; 522. First horizontal section; 53. Deformation strip; 531. Second vertical section; 532. Second horizontal section; 54. Vibrating strip; 6. Counterweight; 61. Slot; 7. Second magnet. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] This utility model relates to an ultra-thin haptic feedback linear motor, such as Figures 1-2 As shown, its specific structure is as follows, including:

[0037] Mounting housing 1 includes a lower housing and a cover plate, and its interior is a cavity; when the linear motor is in use, mounting housing 1 will be attached to the bottom of the screen.

[0038] Vibrating block 2 is set inside mounting shell 1; a first magnet 3 is fixedly set on vibrating block 2, with one extreme end (either S pole or N pole) of the first magnet 3 facing upward;

[0039] Two coils 4 are fixedly installed inside the mounting housing 1 and are located on the upper sides of the first magnet 3, respectively, to drive the first magnet 3 to move. When the coils 4 are energized, they will form magnetism. When installing the coils 4, one end of the coil 4 should face down. The polarity of the two ends of the coil 4 will change depending on the direction of the current. However, no matter how the polarity changes, the polarities of the two ends of the coils 4 must be opposite. That is, if one coil 4 faces down as the S pole, then the other coil 4 should face down as the N pole.

[0040] The elastic sheet 5 is installed inside the mounting shell 1 and is used to reset the vibrating block 2 and generate vibration.

[0041] The specific structure of elastic sheet 5 is as follows: Figures 3-7 As shown, it includes two connecting strips 51, several fixing strips 52, several deformable strips 53, and two vibration strips 54; the specific number of fixing strips 52 and deformable strips 53 can be set according to actual usage requirements;

[0042] Two connecting strips 51 are located on both sides of the vibrating block 2;

[0043] The middle section of the fixing strip 52 is fixedly installed on the mounting shell 1, and its two ends are respectively connected to two connecting strips 51;

[0044] The middle section of the deformable strip 53 is fixedly connected to the vibrating block 2, and both ends are connected to two connecting strips 51 respectively;

[0045] Each vibrating bar 54 is connected to a connecting bar 51 at one end, and the other end is in a free swinging state.

[0046] The specific working principle of this linear motor is as follows:

[0047] During operation, an alternating current is passed through coil 4, causing the direction of the current through the two coils 4 to change periodically; now assume the polarities of the first magnet 3 and the coils 4 at each end, as follows: Figure 8 As shown, the bottom N pole of the left coil 4 repels the top N pole of the first magnet 3, while the bottom S pole of the right coil 4 attracts the top N pole of the first magnet 3, thus creating a resultant force to the right on the first magnet 3. The first magnet 3 then moves the vibrating block 2 to the right. When the current through the coil 4 reverses direction, the two coils 4 similarly create a resultant force to the left on the first magnet 3. Thus, with the periodic change in the direction of the current, the vibrating block 2 will continuously move to the left and right, thereby generating vibration.

[0048] Because this linear motor is relatively thin, the overall weight of the vibrating block 2 is also small, resulting in less kinetic energy generated during movement. If a spring were used for reset, its absorption of the vibrating block 2's kinetic energy would be relatively poor, hindering vibration feedback. Therefore, this linear motor uses an elastic sheet 5 to replace the function of a spring: when the vibrating block 2 moves, the fixing strip 52 remains stationary, while the vibrating block 2 drives the deforming strip 53 to move, causing the elastic sheet 5 to deform and accumulate energy. With the continuous left-right movement of the vibrating block 2, the elastic sheet 5 constantly deforms and resets, generating greater vibration that is transmitted to the mounting housing 1, resulting in more noticeable vibration feedback on the screen. Furthermore, to further increase vibration, a vibration strip 54 is also provided on the elastic sheet 5. During the continuous deformation and reset of the elastic sheet 5, the free end of the vibration strip 54 is constantly swung, further increasing the vibration generated by the linear motor.

[0049] Preferably, a first vertical segment 521 and a first horizontal segment 522 are provided at both ends of the fixing strip 52, so that the end of the fixing strip 52 is folded into a "Z" shape; a second vertical segment 531 and a second horizontal segment 532 are provided at both ends of the deformable strip 53, so that the end of the deformable strip 53 is folded into a "Z" shape; the first horizontal segment 522 and the second horizontal segment 532 are both connected to the connecting strip 51. The "Z"-shaped ends of the fixing strip 52 and the deformable strip 53 can effectively increase the deformation length of the fixing strip 52 and the deformable strip 53. Since the fixing strip 52 is fixed and the deformable strip 53 is relatively free to move, the degree and direction of deformation of the "Z"-shaped ends of the fixing strip 52 and the deformable strip 53 will be different. Since the connecting strip 51 is the first horizontal segment 522 and the second horizontal segment 532, the horizontal deformation of the "Z"-shaped ends of the fixing strip 52 and the deformable strip 53 will cause the connecting strip 51 to twist. As the connecting strip 51 twists, the first horizontal segment 522 and the second horizontal segment 532 will also rotate. At this time, the "Z"-shaped ends of the fixing strip 52 and the deformable strip 53 will then produce vertical deformation, thereby significantly increasing the degree of deformation of the elastic sheet 5 and making the vibration generated by the elastic sheet 5 greater.

[0050] Preferably, the first vertical segment 521 and the second vertical segment 531 are aligned, and the first horizontal segment 522 and the second horizontal segment 532 are aligned. This allows the processing of the fixing strip 52 and the deforming strip 53 to be completed in one convenient bending operation, saving processing costs.

[0051] It is preferable to fix a counterweight 6 at the free end of each vibrating bar 54 to increase the weight of the free end of the vibrating bar 54, so that the vibration amplitude of the vibrating bar 54 can be greater when the elastic sheet 5 deforms and swings the vibrating bar 54.

[0052] Preferably, the free end of each vibrating strip 54 is bent to form a groove, and the counterweight 6 is placed in the groove. This facilitates the installation of the counterweight 6 and, in particular, prevents the counterweight 6 from being thrown off. The side of the counterweight 6 is preferably provided with a vertical slot 61, and the free end of the vibrating strip 54 extends into the slot 61. This can prevent the vibrating strip 54 from sliding out from the side of the slot.

[0053] Preferably, two second magnets 7 are also fixedly disposed on the vibrating block 2; the two second magnets 7 are respectively located on both sides of the first magnet 3; one end of the second magnet 7 faces upward, and its polarity is opposite to that of the upward-facing end of the first magnet 3, such as... Figure 8 As shown, if the top end of the first magnet 3 is the N pole, then the upward-facing end of the second magnet 7 should be the S pole; each coil 4 is located between the second magnet 7 and the first magnet 3. Figure 8 For example, now the first magnet 3 is subjected to a force to the right. It can be seen that the left coil 4 generates an attractive force on the left second magnet 7, causing the left second magnet 7 to be subjected to a force to the right. The right coil 4 repels the left second magnet 7, causing the right second magnet 7 to be subjected to a force to the right. In this way, both second magnets 7 and the first magnet 3 are subjected to a force to the right, thereby increasing the overall force on the vibrating block 2, making it faster and with greater kinetic energy.

[0054] Preferably, a through groove is provided at the center of the end of the vibrating bar 54 that connects to the connecting bar 51, so that the end of the vibrating bar 54 forms two spaced connecting segments. This shape can effectively increase the vibration amplitude of the vibrating bar 54, and even allow the vibrating bar 54 to generate a certain amount of torsion when swinging, thereby further increasing the vibration magnitude generated by the linear motor.

[0055] Preferably, the top of the vibrating block 2 is set as a hollow structure, and the bottom of the vibrating block 2 is a solid structure. In addition to optimizing the magnetic field lines and ensuring the normal driving of the two magnets by the coil 4, the hollow structure can also lower the center of gravity of the vibrating block 2, so that the vibrating block 2 can more easily drive the deformation of the elastic sheet 5 and improve the vibration effect.

[0056] Preferably, a raised mounting strip 11 is provided on the bottom surface inside the mounting shell 1 for fixed connection with the fixing strip 52. The raised mounting strip 11 can support the elastic sheet 5 as a whole, so that there is enough space for movement under the deformable strip 53 and the vibrating strip 54, and avoids interference with the mounting shell 1.

[0057] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An ultra-thin haptic feedback linear motor, characterized in that, include: Mounting shell (1), the interior of which is a cavity; A vibrating block (2) is disposed inside the mounting housing (1); a first magnet (3) is fixedly disposed on the vibrating block (2), with one end of the first magnet (3) facing upward; Two coils (4) are fixedly installed inside the mounting housing (1) and are located on the upper sides of the first magnet (3); one end of the coil (4) faces downward; the polarities of the two coils (4) are opposite. An elastic sheet (5) is disposed inside the mounting housing (1); the elastic sheet (5) includes two connecting strips (51), several fixing strips (52), several deformable strips (53), and two vibrating strips (54); The two connecting strips (51) are located on both sides of the vibrating block (2); The middle section of the fixing strip (52) is fixedly installed on the mounting shell (1), and both ends are connected to the two connecting strips (51) respectively; The middle section of the deformable strip (53) is fixedly connected to the vibrating block (2), and both ends are respectively connected to the two connecting strips (51); Each of the vibration bars (54) is connected at one end to a connecting bar (51), and the other end is in a free swinging state.

2. The ultra-thin haptic feedback linear motor according to claim 1, characterized in that, The fixing strip (52) has a first vertical section (521) and a first horizontal section (522) at both ends; the deformable strip (53) has a second vertical section (531) and a second horizontal section (532) at both ends; the first horizontal section (522) and the second horizontal section (532) are connected to the connecting strip (51).

3. The ultra-thin haptic feedback linear motor according to claim 2, characterized in that, The first vertical segment (521) and the second vertical segment (531) are aligned; the first horizontal segment (522) and the second horizontal segment (532) are aligned.

4. The ultra-thin haptic feedback linear motor according to claim 1, characterized in that, Each of the vibrating bars (54) has a counterweight (6) fixedly installed at its free end.

5. The ultra-thin haptic feedback linear motor according to claim 4, characterized in that, The free end of each of the vibrating bars (54) is bent to form a groove, and the counterweight (6) is disposed in the groove.

6. The ultra-thin haptic feedback linear motor according to claim 4, characterized in that, The counterweight (6) has a vertical slot (61) on its side, and the free end of the vibrating strip (54) extends into the slot (61).

7. The ultra-thin haptic feedback linear motor according to claim 1, characterized in that, Two second magnets (7) are also fixedly arranged on the vibrating block (2); the two second magnets (7) are respectively located on both sides of the first magnet (3); one end of the second magnet (7) faces upward and its polarity is opposite to that of the upward end of the first magnet (3); each coil (4) is located between the second magnet (7) and the first magnet (3).

8. The ultra-thin haptic feedback linear motor according to claim 1, characterized in that, A through groove is provided at the center of the end of the vibrating bar (54) that is connected to the connecting bar (51).

9. The ultra-thin haptic feedback linear motor according to claim 1, characterized in that, The top of the vibrating block (2) is a hollow structure.

10. The ultra-thin haptic feedback linear motor according to claim 1, characterized in that, The mounting housing (1) has a raised mounting strip (11) on its inner bottom surface for fixed connection with the fixing strip (52).

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