Bidirectional vibration elastic sheet structure and linear vibration exciter

Abstract

The invention relates to the technical field of linear vibration exciters, in particular to a bidirectional vibration elastic sheet structure and a linear vibration exciter. The inner pipe body is used for fixing a mass block, and the first outer pipe body and the second outer pipe body are arranged at the two ends of the inner pipe body respectively and used for being connected with a shell. The inner pipe body comprises two connecting pieces which are oppositely arranged, the mass block is fixed between the two connecting pieces, the inner pipe body further comprises a first longitudinal elastic arm and a second longitudinal elastic arm which are vertically connected to the two sides of the two connecting pieces in the width direction, the first longitudinal elastic arm and the second longitudinal elastic arm extend in the direction parallel to the length direction of the connecting pieces, and the extending directions are opposite; one side of the first outer pipe body is connected with the cantilever end of the first longitudinal elastic arm, one side of the second outer pipe body is connected with the cantilever end of the second longitudinal elastic arm, and the ends, away from the ends connected with the inner pipe body, of the first outer pipe body and the second outer pipe body are connected with the shell. Through the arrangement, the installation difficulty of the elastic sheet is simplified.

Description

Technical Field

[0001] The present invention relates to the technical field of linear vibration exciters, and particularly to a bidirectional vibration shrapnel structure and a linear vibration exciter. Background Art

[0002] A bidirectional linear vibration exciter is a device that can generate linear vibrations in two directions and is widely used in applications such as haptic feedback, force feedback, vibration testing, and other scenarios that require precise vibration control.

[0003] In the prior art, for example, a Chinese invention patent with the publication number CN119315789A discloses a linear vibration motor on January 14, 2025. It has a first shrapnel on the left and right sides of the oscillator assembly and a second shrapnel on the upper and lower sides of the oscillator assembly. Through the above arrangement and the interaction of the coil and the magnetic field, bidirectional vibrations in the X direction and the Z direction are achieved, thereby providing different vibration sensations.

[0004] However, the installation of the shrapnel of the above bidirectional linear vibration motor is difficult, and there is a problem of low yield. Summary of the Invention

[0005] In view of at least one of the above technical problems, the present invention provides a bidirectional vibration shrapnel structure and a linear vibration exciter, and improves the shrapnel structure to reduce the installation difficulty of the exciter.

[0006] According to a first aspect of the present invention, a bidirectional vibration shrapnel structure is provided. The bidirectional vibration shrapnel structure is integrally in the shape of a rectangular sleeve structure, and includes an inner tube body for fixing a mass block, and a first outer tube body and a second outer tube body respectively arranged at both ends of the inner tube body for connecting with a housing. The inner tube body includes two oppositely arranged connecting pieces, the mass block is fixed between the two connecting pieces, and the inner tube body further includes a first longitudinal spring arm and a second longitudinal spring arm vertically connected to both sides in the width direction of the two connecting pieces. The first longitudinal spring arm and the second longitudinal spring arm both extend along a direction parallel to the length of the connecting piece, and the extending directions are opposite. One side of the first outer tube body is connected to the cantilever end of the first longitudinal spring arm, one side of the second outer tube body is connected to the cantilever end of the second longitudinal spring arm, and both ends of the first outer tube body and the second outer tube body away from the connection with the inner tube body are connected to the housing. Wherein, the first longitudinal spring arm and the second longitudinal spring arm form a cantilever for the mass block to vibrate in the X direction, and the first outer tube body and the second outer tube body form a cantilever for the mass block to vibrate in the Z direction.

[0007] Further, the starting end of the first longitudinal spring arm is close to the second outer tube body, and the starting end of the second longitudinal spring arm is close to the first outer tube body.

[0008] Further, both the first longitudinal elastic arm and the second longitudinal elastic arm are of a split type, and each includes a first arm perpendicularly connected to one of the two connecting pieces, and a second arm perpendicularly connected to the other of the two connecting pieces, and the first arm and the second arm are arranged in the same plane.

[0009] Further, both the first outer tube body and the second outer tube body include a support arm for connecting with the housing, transverse elastic arms perpendicularly connected to both ends of the support arm, and connecting arms perpendicularly connected to the two transverse elastic arms respectively; The two transverse elastic arms extend in the same direction, the two connecting arms extend towards each other and are not connected, and the two connecting arms are respectively connected to the first arm and the second arm; The support arm protrudes outwards from the outer side of the inner tube body in the width direction.

[0010] Further, the bidirectional vibration elastic sheet structure is an axisymmetric structure and is integrally formed by a sheet metal bending process.

[0011] Further, the length of the first arm is greater than that of the transverse elastic arm, and the average width of the transverse elastic arm is greater than the average width of the first arm.

[0012] Further, the first arm, the second arm, and the transverse elastic arm are all arc-shaped plate structures with a smaller width in the middle than at both ends.

[0013] Further, both the connection positions of the first arm and the second arm with the connecting piece and the connection positions with the connecting arm have hollowed-out grooves.

[0014] According to the second aspect of the present invention, there is also provided a linear vibration exciter, which is characterized by comprising: A housing, the interior of which forms an accommodation chamber; A coil fixed at both ends in the length direction of the housing; A vibration assembly, including the bidirectional vibration elastic sheet structure according to any one of the first aspect, and further including a mass block fixed in the bidirectional vibration elastic sheet structure, and magnetic steel assemblies fixed at both ends of the mass block; Wherein, the magnetic steel assemblies form an inclined magnetic field, so that when an alternating current is passed through the coil, the mass block vibrates in the X and Z directions.

[0015] Further, the magnetic steel assemblies include magnetic bowls fixed on the mass block, and a first magnetic steel, an intermediate magnetic steel, and a second magnetic steel spliced and fixed in the magnetic bowls. The first magnetic steel and the second magnetic steel are arranged in a symmetric triangular structure, the intermediate magnetic steel is in a long strip structure and is fixed between the two, and the magnetic pole directions of the first magnetic steel and the second magnetic steel are arranged in opposite directions.

[0016] The beneficial effects of the present invention are as follows: Through the structural design of the vibrating elastic sheet in the shape of a rectangular sleeve, the mass block is fixed by the inner tube, the first longitudinal elastic arm and the second longitudinal elastic arm on the inner frame are connected to the first outer tube body and the second outer tube body at both ends, and the first outer tube body and the second outer tube body are connected to the housing. Compared with the prior art, during specific installation, it only needs to fix the mass block in the inner tube body and connect the first outer tube body and the second outer tube body to the housing respectively, which reduces the installation difficulty of the bidirectional elastic sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic structural diagram of the bidirectional vibrating elastic sheet structure in the embodiment of the present invention; Figure 2 It is a schematic side view installation diagram of the bidirectional vibrating elastic sheet structure in the embodiment of the present invention; Figure 3 It is a schematic structural diagram of the bidirectional vibrating elastic sheet structure from another perspective in the embodiment of the present invention; Figure 4 It is a schematic exploded view structure diagram of the linear vibration exciter in the embodiment of the present invention; Figure 5 It is a schematic exploded view structure diagram of the vibration assembly in the embodiment of the present invention; Figure 6 It is a schematic structural diagram of the magnet assembly in the embodiment of the present invention; Figure 7 It is a schematic exploded view structure diagram of the first magnet, the middle magnet and the second magnet in the embodiment of the present invention; Figure 8 It is a schematic magnetic force line structure diagram of the coil and the magnet assembly in the embodiment of the present invention; Figure 9 It is a schematic structural diagram of the effective area of the coil in the embodiment of the present invention.

[0019] Description of reference numerals: 1. Inner tube body; 11. Connecting piece; 12. First longitudinal elastic arm; 121. First branch arm; 122. Second branch arm; 123. Hollowed-out groove; 13. Second longitudinal elastic arm; 2. First outer tube body; 21. Support arm; 22. Transverse elastic arm; 23. Connecting arm; 3. Second outer tube body; 4. Housing; 5. Coil; 6. Vibration assembly; 61. Mass block; 62. Magnet assembly; 621. Magnetic bowl; 622. First magnet; 623. Intermediate magnet; 624. Second magnet. Detailed implementation manners

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manners.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this invention belongs. The terms used in the description of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0023] As Figures 1 to 3 shown in the bidirectional vibration elastic sheet structure, the bidirectional vibration elastic sheet structure is integrally in a rectangular sleeve shape, and includes an inner tube body 1 for fixing the mass block 61, and a first outer tube body 2 and a second outer tube body 3 respectively arranged at both ends of the inner tube body 1 for connecting with the outer shell; in the embodiment of the present invention, the tube body refers to a tube body whose cross-sectional shape is similar to a rectangle. Compared with the prior art in which multiple elastic sheets are respectively connected to the mass block 61 and then the elastic sheets are connected to the housing 4, the bidirectional vibration elastic sheet structure in the present application can directly wrap the mass block 61, reducing the connection points and thus reducing the installation difficulty.

[0024] Specifically, as Figure 1As shown in the figure, the inner tube body 1 includes two oppositely arranged connecting pieces 11. The mass block 61 is fixed between the two connecting pieces 11. The inner tube body 1 further includes a first longitudinal elastic arm 12 and a second longitudinal elastic arm 13 vertically connected to both sides in the width direction of the two connecting pieces 11. Both the first longitudinal elastic arm 12 and the second longitudinal elastic arm 13 extend along the direction parallel to the length of the connecting piece 11, and the extending directions are opposite; here, the opposite extending directions mean that the first longitudinal elastic arm 12 extends towards the left, while the second longitudinal elastic arm 13 extends towards the right; in the embodiment of the present invention, the first longitudinal elastic arm 12 and the second longitudinal elastic arm 13 can be connected to the two connecting pieces 11 at both ends in the height direction and then extend towards the horizontal direction in the middle; or it can adopt the split form as shown in Figure 1 shown, and the split structure will be described in detail in the following part of the embodiment of the present invention. In the embodiment of the present application, as shown in Figure 2 shown, the width of the connecting piece 11 is greater than the width of the mass block 61, so that the first longitudinal elastic arm 12 and the second longitudinal elastic arm 13 provide support and resilience for the left and right movement of the mass block 61 in the X-axis direction, that is, the width direction of the mass block 61.

[0025] Please continue to refer to Figure 1 , in the embodiment of the present invention, one side of the first outer tube body 2 is connected to the cantilever end of the first longitudinal elastic arm 12, one side of the second outer tube body 3 is connected to the cantilever end of the second longitudinal elastic arm 13, and both ends of the first outer tube body 2 and the second outer tube body 3 far from the connection with the inner tube body 1 are connected to the housing; that is, as shown in Figure 1 shown, the right side of the first outer tube body 2 is connected to the first longitudinal elastic arm 12, as shown in Figure 2 shown, the left side of the first outer tube body 2 is connected to the housing; through such a setting, the first longitudinal elastic arm 12 and the second longitudinal elastic arm 13 constitute the cantilever for the mass block 61 to vibrate in the X direction, and the first outer tube body 2 and the second outer tube body 3 constitute the cantilever for the mass block 61 to vibrate in the Z direction. It should be noted here that since the right side of the first outer tube body 2 is connected to the first longitudinal elastic arm 12 and the left side is connected to the housing, its upper and lower sides constitute the support for the inner tube body 1 to move up and down in the up and down direction, that is, the Z direction.

[0026] In the above embodiment, through the design of the rectangular sleeve-shaped vibration elastic sheet structure, and by fixing the mass block 61 through the inner tube, connecting the first longitudinal elastic arm 12 and the second longitudinal elastic arm 13 on the inner frame to the first outer tube body 2 and the second outer tube body 3 at both ends, and connecting the first outer tube body 2 and the second outer tube body 3 to the housing 4, compared with the prior art, during specific installation, only the mass block 61 needs to be fixed in the inner tube body 1 and the first outer tube body 2 and the second outer tube body 3 are respectively connected to the housing 4 to achieve, reducing the installation difficulty of the bi-directional elastic sheet.

[0027] On the basis of the above embodiment, please continue to refer to Figure 1, in an embodiment of the present invention, in order to maximize the amplitude of the mass block 61 in the X-axis direction, the starting end of the first longitudinal spring arm 12 is close to the second outer tube 3, and the starting end of the second longitudinal spring arm 13 is close to the first outer tube 2. Thus, the starting end of the first longitudinal spring arm 12 starts from the rightmost end of the connecting piece 11 and extends to the left end of the connecting piece 11, so that the arm length of the first longitudinal spring arm 12 is increased, thereby increasing the amplitude of vibration.

[0028] In an embodiment of the present invention, in order to ensure the stability of vibration, as Figure 3 shown, both the first longitudinal spring arm 12 and the second longitudinal spring arm 13 are of a split type, and both include a first branch arm 121 vertically connected to one of the two connecting pieces 11, and a second branch arm 122 vertically connected to the other of the two connecting pieces 11. The first branch arm 121 and the second branch arm 122 are arranged in the same plane. That is, the first branch arm 121 is bent from the upper connecting piece 11 and extends to the first outer tube 2, and the second branch arm 122 is bent from the lower connecting piece 11 and extends to be connected to the first outer tube 2; the structural form of the second longitudinal spring arm 13 is the same as that of the first longitudinal spring arm 12, except for the opposite direction, which will not be elaborated here. Through the setting of this structural form, four symmetrically arranged ribs are formed on the mass block 61 in the X-axis direction, thereby reducing the unnecessary torsion of the mass block 61 during left and right vibration.

[0029] Please continue to refer to Figure 3 , in some embodiments of the present invention, both the first outer tube 2 and the second outer tube 3 include a support arm 21 for connecting to the housing, a transverse spring arm 22 vertically connected to both ends of the support arm 21, and a connecting arm 23 respectively vertically connected to the two transverse spring arms 22; the two transverse spring arms 22 extend in the same direction, the two connecting arms 23 extend towards each other and are not connected, and the two connecting arms 23 are respectively connected to the first branch arm 121 and the second branch arm 122; the support arm 21 protrudes from the outside of the inner tube 1 in the width direction. Through such a setting, as Figure 2 shown, the support arm 21 of the first outer tube 2 is fixed to the left side of the housing, and the support arm 21 of the second outer tube 3 is fixed to the right side of the housing, and there are four symmetric ribs both in the X-axis direction and in the Z-axis direction, that is, the transverse spring arms 22 on the upper and lower sides of the first outer tube 2, the transverse spring arms 22 on the upper and lower sides of the second outer tube 3, and the first branch arm 121 and the second branch arm 122 on the left and right sides of the inner tube 1. Through the setting of this structural form, the stability of the structure can be further ensured.

[0030] In an embodiment of the present invention, in order to simplify the manufacturing process of the bi-directional vibrating shrapnel structure, the bi-directional vibrating shrapnel structure is an axisymmetric structure and is integrally formed by a sheet metal bending process. During specific processing, the excess part on the sheet can be removed by stamping first, and then formed by bending. Through the above structural settings, not only the manufacturing cost is low, but also the assembly is simple and it is easy to mass-produce.

[0031] In an embodiment of the present invention, the length of the first arm 121 is greater than that of the transverse spring arm 22, and the average width of the transverse spring arm 22 is greater than the average width of the first arm 121. Through the above structural settings, the first arm 121 is slender along the length direction of the actuator, with a small structural stiffness; while the transverse spring arm 22 is thick and long along the width direction of the actuator, with a large structural stiffness; through the setting of this structural form, the actuator mainly vibrates along the width direction at a low frequency state, and mainly vibrates along the height direction at a high frequency state; through the setting of this structure, the vibration feeling is clearer, overcoming the problem that the high-frequency vibration feeling in the prior art is too sharp, and improving the user experience.

[0032] In an embodiment of the present invention, in order to further increase the vibration amplitude, as Figure 3 shown, the first arm 121, the second arm 122 and the transverse spring arm 22 are all arc-shaped plate structures with a smaller middle width than the two ends. By reducing the middle width, the stiffness is reduced, thereby expanding the amplitude; and in an embodiment of the present invention, the joints of the first arm 121 and the second arm 122 with the connecting piece 11 and the joints with the connecting arm 23 both have hollow grooves 123. Through the setting of the arc-shaped structure and the hollow grooves 123, the lengths of the first arm 121 and the second arm 122 are further lengthened.

[0033] In an embodiment of the present invention, a linear vibration actuator is also provided, as Figure 4 and Figure 5 shown, including a housing 4, a coil 5 and a vibration assembly 6, wherein as Figure 4 shown, the interior of the housing 4 forms a receiving chamber, and the specific structure of the housing 4 can be formed by welding, or can be such as Figure 4The structural form of bending and splicing molding shown in the figure; the coil 5 is fixed at both ends in the length direction of the housing 4. In the embodiment of the present invention, the coil 5 is used to provide an alternating magnetic field towards the vibration assembly 6, so that the vibration assembly 6 vibrates under the action of the changing magnetic force. The vibration assembly 6 includes the above-mentioned bidirectional vibration shrapnel structure, and further includes a mass block 61 fixed inside the bidirectional vibration shrapnel structure. Magnets assemblies 62 are fixed at both ends of the mass block 61; it should be noted here that in the embodiment of the present invention, there is a certain gap between the magnets assemblies 62 and the coil 5, so that the magnets assemblies 62 can vibrate when subjected to the magnetic force of the coil 5, specifically as Figure 8 shown in the figure, the magnets assemblies 62 form an inclined magnetic field, so that when an alternating current passes through the coil 5, the mass block 61 vibrates in the X and Z directions.

[0034] Please refer specifically to Figure 6 and Figure 7 , in the embodiment of the present invention, the magnets assemblies 62 include a magnetic bowl 621 fixed on the mass block 61, and a first magnet 622, an intermediate magnet 623 and a second magnet 624 spliced and fixed inside the magnetic bowl 621. The first magnet 622 and the second magnet 624 are arranged in a symmetric triangular structure. The intermediate magnet 623 is in a strip structure and is fixed between the two. The magnetic pole directions of the first magnet 622 and the second magnet 624 are set in opposite directions. In the embodiment of the present invention, the magnetic pole directions of the first magnet 622 and the second magnet 624 are opposite; as Figure 8 and Figure 9 shown in the figure, on the side close to the coil 5, due to the existence of the intermediate magnet 623, a non-magnetic area is formed to prevent the magnetic lines of force of the first magnet 622 from directly reaching the second magnet 624 along the surface of the magnet. In the embodiment of the present invention, more magnetic lines of force are emitted from the first magnet 622, vertically penetrate into the effective area of the coil 5, then penetrate out of the effective area of the coil 5, enter the second magnet 624, and finally return to the first magnet 622 from the second magnet 624 through the magnetic bowl 621. Through the above structural form, a Halbach magnetic circuit is formed, effectively improving the magnetic force, and further enhancing the vibration feeling of the actuator.

[0035] Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A bidirectional vibrating spring structure, characterized in that: The bidirectional vibration spring structure is in the shape of a rectangular sleeve as a whole, and comprises an inner tube body for fixing the mass block and a first outer tube body and a second outer tube body respectively arranged at two ends of the inner tube body for connecting with the outer shell; The inner tube body includes two connecting pieces arranged opposite to each other, the mass block is fixed between the two connecting pieces, and the inner tube body also includes a first longitudinal elastic arm and a second longitudinal elastic arm vertically connected to both sides of the two connecting pieces in the width direction, the first longitudinal elastic arm and the second longitudinal elastic arm both extend in a direction parallel to the length of the connecting piece, and the extending directions are opposite; One side of the first outer tube is connected to the cantilever end of the first longitudinal elastic arm, one side of the second outer tube is connected to the cantilever end of the second longitudinal elastic arm, and the ends of the first outer tube and the second outer tube away from the connection with the inner tube are both connected to the outer shell; The first longitudinal elastic arm and the second longitudinal elastic arm constitute a cantilever for the mass block to vibrate along the X direction, and the first outer tube body and the second outer tube body constitute a cantilever for the mass block to vibrate along the Z direction.

2. The bidirectional vibration spring structure according to claim 1, characterized in that: The starting end of the first longitudinal elastic arm is close to the second outer tube body, and the starting end of the second longitudinal elastic arm is close to the first outer tube body.

3. The bidirectional vibration spring structure according to claim 2, characterized in that: The first longitudinal elastic arm and the second longitudinal elastic arm are both separately arranged, and each includes a first arm vertically connected to one of the two connecting plates, and a second arm vertically connected to the other of the two connecting plates, and the first arm and the second arm are coplanarly arranged.

4. The bidirectional vibration spring structure according to claim 3, characterized in that: The first outer tube body and the second outer tube body each include a support arm for connecting to the outer shell, a transverse elastic arm vertically connected to both ends of the support arm, and a connecting arm vertically connected to the two transverse elastic arms respectively; The two transverse elastic arms extend in the same direction, the two connecting arms extend in opposite directions and are not connected, and the two connecting arms are respectively connected to the first support arm and the second support arm; The support arm protrudes from the outer side of the inner tube body in the width direction.

5. The bidirectional vibration spring structure according to claim 4, characterized in that: The bidirectional vibration spring structure is an axisymmetric structure and is integrally formed by a sheet metal bending process.

6. The bidirectional vibration spring structure according to claim 5, characterized in that: The length of the first support arm is greater than that of the transverse elastic arm, and the average width of the transverse elastic arm is greater than the average width of the first support arm.

7. The bidirectional vibration spring structure according to claim 5, characterized in that: The first support arm, the second support arm and the transverse elastic arm are all in an arc-shaped plate structure with a width in the middle smaller than that at both ends.

8. The bidirectional vibration spring structure according to claim 5, characterized in that: The first and second arms are both provided with hollowed-out grooves at their connection locations with the connection sheet and at their connection locations with the connection arm.

9. A linear vibration exciter, characterized in that: include: A housing, wherein the interior of the housing forms a receiving chamber; A coil is fixed to both ends of the shell in the length direction; A vibration component, comprising the bidirectional vibration spring structure according to any one of claims 1 to 8, and further comprising a mass block fixed in the bidirectional vibration spring structure, wherein both ends of the mass block are fixed with magnetic steel components; The magnetic steel assembly forms an inclined magnetic field, so that when an alternating current is passed through the coil, the mass block vibrates in the X and Z directions.

10. The linear vibration exciter according to claim 9, characterized in that: The magnetic steel assembly includes a magnetic bowl fixed on the mass block and a first magnetic steel, an intermediate magnetic steel and a second magnetic steel spliced ​​and fixed in the magnetic bowl. The first magnetic steel and the second magnetic steel are in a symmetrically arranged triangular structure, the intermediate magnetic steel is a long strip structure and is fixed therebetween, and the magnetic poles of the first magnetic steel and the second magnetic steel are arranged in opposite directions.

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