Counterweight type vibration device and manufacturing method thereof

Abstract

The invention discloses a counterweight type vibration device and a manufacturing method thereof. A balance weight type vibration device comprises a shell and a vibration assembly. The shell is provided with two elastic supporting structures located at the two ends of the vibration assembly. The shell is further provided with a through groove used for penetrating through the two ends of the vibration assembly and communicating with the hollow cavity. The vibration assembly comprises two balancing weights located at the ends, short strong magnetic strips adjacent to the balancing weights, a long strong magnetic strip located between the two short strong magnetic strips, and two fixing screws which connect the balancing weights, the short strong magnetic strips and the long strong magnetic strip together and are located on the two sides. The vibration assembly further comprises two coils, and the change of current conducted by the two coils causes the change of magnetic field force so as to form the vibration of the vibration assembly in the same proportion as the change of the current; and the balancing weight is made of a non-magnetic material. The magnetic field generated by the short strong magnetic strip and the long strong magnetic strip is limited in a smaller range, so that the moving range of the magnetic field is reduced in the vibration process of the vibration assembly, the influence on the coil is further reduced, and a better vibration effect is achieved.

Description

Technical Field

[0001] The present invention relates to a vibration device, in particular to a counterweight-loaded vibration device and a manufacturing method thereof. Background Art

[0002] Vibration devices on the market are divided into three categories. One type uses a motor to drive a pendulum. The vibration frequency is directly related to the motor's speed, making it difficult to control and achieve precise vibration frequency effects. In addition, it produces mechanical vibration noise and cannot be synchronized with the audio. Another type uses a dynamic coil to drive a vibration plate to achieve the vibration effect, but the vibration sense is small and the power cannot meet product requirements, and it cannot drive large-mass products. Another type uses electromagnetic drive to achieve the vibration effect through shrapnel suppression, but it still cannot reduce mechanical noise.

[0003] Therefore, it is necessary to develop a vibration device that can be synchronized with audio and has low mechanical noise.

[0004] Furthermore, when the coil drives the vibrating assembly, the magnetic field of the vibrating assembly reciprocates with the assembly. When it reaches its extreme end position and switches, it inhibits the coil. Therefore, it is necessary to develop a vibrating device and manufacturing method that can reduce the impact on the coil. Summary of the Invention

[0005] The purpose of the present invention is to provide a counterweight vibration device and a manufacturing method thereof in order to solve the above problems existing in the prior art.

[0006] The objectives of the present invention are achieved through the following technical solutions: the present invention provides a counterweight vibration device, comprising a shell provided with a hollow cavity, and a vibration component arranged in the hollow cavity; the shell is provided with two elastic support structures located at both ends of the vibration component; the shell is also provided with a through groove for passing through the two ends of the vibration component and communicating with the hollow cavity; the vibration component comprises two counterweight blocks located at the end portions, a short strong magnetic strip adjacent to the counterweight blocks, a long strong magnetic strip located between the two short strong magnetic strips, and two fixing screws located on both sides that connect the counterweight blocks, the short strong magnetic strips and the long strong magnetic strips together; it also includes two coils fixed to the inner wall of the hollow cavity and located at the outer periphery of the short strong magnetic strips and the long strong magnetic strips, the current conducted by the two coils changes, causing the magnetic field force to change, so as to form a vibration of the vibration component in proportion to the current change; the counterweight block is made of non-magnetic material.

[0007] Preferably, one side of the outer end of one of the counterweight blocks is an external connection side, which extends to the outside of the through slot and is fixedly connected to the elastic support structure, and the other side is an internal connection side, which is provided with a screw hole for passing the fixing screw; one side of the outer end of the other counterweight block is an internal connection side, which is provided with a screw hole for passing the fixing screw, and the other side is an external connection side, which extends to the outside of the through slot and is fixedly connected to the elastic support structure.

[0008] Preferably, the elastic support structure is a spring sheet, one end of which is fixedly connected to the shell, and the other end is fixedly connected to the outer connection side of the counterweight block; a clearance groove for avoiding the spring sheet is provided on the outer side of the through slot.

[0009] Preferably, the thickness of the outer connecting side is more than twice the thickness of the inner connecting side.

[0010] Preferably, a hollow groove is provided in the middle of the counterweight block, and the size of the hollow groove is set according to the counterweight parameters.

[0011] Preferably, an elliptical through groove is provided at the center of the elastic piece; and two screw holes are provided at one end of the elastic piece fixedly connected to the housing.

[0012] Preferably, the sides of the short strong magnetic strip and the long strong magnetic strip are provided with open slots for passing fixing screws; the counterweight block is provided with a protrusion that cooperates with the elliptical through slot for positioning during connection.

[0013] Preferably, the shell is a square structure; the hollow cavity is provided with an upper opening for the coil to be installed in the hollow cavity; the side of the upper opening is provided with a notch for passing the wire of the coil; the outside of the notch is provided with a mounting edge groove for embedded installation of a PCB board; the outside of the PCB board is provided with electrical contacts for connecting the wires.

[0014] The manufacturing method of the counterweight-type vibration device of the present invention includes the following assembly steps: first, using two of the fixing screws to fix the counterweight block, the short strong magnetic strip, the long strong magnetic strip, the short strong magnetic strip, and the counterweight block together from both sides in sequence to form the vibration component; embedding the coil into the hollow cavity from the upper opening of the shell; then inserting the vibration component into the coil from the outside of one of the through slots; then positioning the spring piece through the raised portion, fixing it to the shell with two fixing screws, and fixing it to the external connection side of the counterweight block with one screw.

[0015] More specifically, each step adopts an automatic installation method with an automatic conveying rail, with the upper opening of the shell facing upward, starting from the loading station: the first station is the loading station, where the shell is placed in a provided jig seat; the second station is to place the coil from the upper opening into the hollow cavity; the third station is to insert the vibration component from the outer edge of the through slot into the coil in the hollow cavity using a pushing mechanism; the fourth station is to fix the two springs to the external connection sides of the shell and the counterweight block using a screw mechanism; the fifth station is the station for pasting veneer paper and PCB boards; the sixth station is the unloading station, where the product is taken out of the jig seat; wherein the jig seat is installed in a reciprocating slide rail, from the loading station to the unloading station; an up and down rotary conveying rail or a plane rotary conveying rail is used.

[0016] In general, compared with the prior art, the beneficial effects of the present invention are as follows: the vibration assembly of the present invention uses non-magnetic counterweights at both ends, thereby limiting the magnetic field generated by the short strong magnetic strips and the long strong magnetic strips to a smaller range, so that the range of movement of the magnetic field of the vibration assembly during vibration is reduced, thereby reducing the impact on the coil and achieving a better vibration effect. Furthermore, the counterweight adopts a structure in which the thickness of the outer connection side is greater than that of the inner connection side, which can form a beveled structure to prevent the inner connection side from colliding with the shrapnel. Furthermore, a hollow groove is adopted to adjust the mass of the counterweight by changing the size of the hollow groove to achieve different counterweight effects. An air-avoiding groove is provided inward, so that the outer shape remains a complete square structure with a small overall space, beautiful appearance, and high structural strength. The upper opening is adopted to facilitate the installation of the coil, and the installation side groove is adopted to facilitate the embedding of the PCB board into the interior of the square structure, maintaining the square shape, beautiful appearance, and easy to achieve automated assembly. The assembly method of the vibration device of the present invention is suitable for use with automated equipment to achieve automated assembly. The vibration device of the present invention can be widely used in products such as small Bluetooth speakers, e-sports controllers, e-sports headphones, massagers, and electric toys. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A cross-sectional view of a specific embodiment of a vibration device of the present invention; Figure 2 for Figure 1 An exploded perspective view of an embodiment; Figure 3 for Figure 1 A perspective view of a vibration assembly portion of an embodiment; Figure 4 for Figure 3 Exploded view of Figure 5 for Figure 1 A perspective view of the housing of an embodiment; Figure 6 for Figure 5 Exploded diagram of .

[0018] Figure numerals: 10, shell; 100, hollow cavity; 101, through slot; 102, air avoidance slot; 107, mounting edge slot; 108, notch; 109, upper opening; 20, vibration assembly; 21, counterweight; 21A, counterweight; 210, hollow slot; 211, external connection side; 212, internal connection side; 213, screw hole; 217, protrusion; 22, short strong magnetic strip; 221, open slot; 23, long strong magnetic strip; 231, open slot; 24, fixing screw; 30, spring piece; 301, elliptical through slot; 302, screw hole; 40, coil; 50, PCB board. DETAILED DESCRIPTION

[0019] In order to more fully understand the technical content of the present invention, the technical solution of the present invention is further introduced and illustrated in conjunction with specific embodiments below, but is not limited thereto.

[0020] like Figures 1 to 6 In the embodiment shown, the present invention provides a counterweight vibration device, comprising a housing 10 having a hollow cavity 100, and a vibration assembly 20 disposed in the hollow cavity 100; the housing 10 is provided with two elastic support structures located at both ends of the vibration assembly 20; the housing 10 is further provided with a through slot 101 for passing through both ends of the vibration assembly 20 and communicating with the hollow cavity 100; the vibration assembly 20 includes two counterweight blocks 21 located at the ends, a short strong magnetic strip 22 adjacent to the counterweight blocks 21, a long strong magnetic strip 23 located between the two short strong magnetic strips 22, and a counterweight block 21, a short strong magnetic strip 22, and a long strong magnetic strip 23 between the two short strong magnetic strips 22. 22 and the long strong magnetic strip 23 are connected together and are connected by two fixing screws 24 on both sides; it also includes two coils 40 fixed to the inner wall of the hollow cavity 100 and located at the periphery of the short strong magnetic strip 22 and the long strong magnetic strip 23. The current changes conducted by the two coils 40 cause changes in the magnetic field force to form a vibration of the vibration component 20 in the same proportion as the current change; the counterweight block 21 is a non-magnetic material and is used to isolate the edge magnetic poles of the short strong magnetic strip. When the vibration component reaches its maximum amplitude, no reverse action power that offsets the forward action power will be generated between it and the coil, which can improve work efficiency.

[0021] More specifically, one of the counterweights 21 has an outer connection side 211 on one side, which is provided with a screw hole 219 that extends to the outside of the through slot 101 and is fixedly connected to the elastic support structure (i.e., the spring 30) via a screw 39. The other side is an inner connection side 212, which is provided with a screw hole 213 for passing the fixing screw 24. The other counterweight 21A has an inner connection side 212 on one side, which is provided with a screw hole 213 for passing the fixing screw 24. The other side is an outer connection side 211, which extends to the outside of the through slot 101 and is fixedly connected to the elastic support structure. The inner ends of the outer connection sides of the two counterweights are also provided with a threaded hole 218 that is connected to the fixing screw 24. The threaded hole 218 and the screw hole 219 can be screw holes with the same axis (using the same thread) or threaded holes with different axes.

[0022] More specifically, the elastic support structure is a spring clip 30, one end of which is fixedly connected to the shell 10 by a screw 38, and the other end is fixedly connected to the outer connection side 211 of the counterweight block 21, 21A; an air avoidance groove 102 is provided on the outer side of the through groove 101 for avoiding the spring clip 30.

[0023] More specifically, the thickness of the outer connecting side 211 is more than twice the thickness of the inner connecting side 212. This can form an outer inclined surface to prevent the inner connecting side from hitting the elastic sheet during vibration.

[0024] More specifically, a hollow groove 210 is provided in the middle of the counterweight block 21 , and the size of the hollow groove 210 is set according to the counterweight parameters.

[0025] More specifically, an elliptical through slot 301 is provided at the center of the spring piece 30 ; and two screw holes 302 are provided at one end of the spring piece 30 that is fixedly connected to the housing 10 .

[0026] More specifically, the sides of the short strong magnetic strip 22 and the long strong magnetic strip 23 are provided with opening slots 221 and 231 for passing the fixing screws 24; the counterweight block 21 is provided with a protrusion 217 that cooperates with the elliptical through slot 301 for positioning during connection.

[0027] More specifically, the shell has a square structure; the hollow cavity 100 is provided with an upper opening 109 for the coil 40 to be installed in the hollow cavity 100; the side of the upper opening 109 is provided with a notch 108 for passing the wire of the coil 40; the outside of the notch 108 is provided with a mounting edge groove 107 for embedded installation of the PCB board 50; the outside of the PCB board 50 is provided with electrical contacts for connecting the wires.

[0028] More specifically, a surface sticker 104 is provided above the upper opening 109 , and a bottom sticker 105 is provided below the housing 10 .

[0029] More specifically, the elliptical through slot 301 in the spring piece is provided with two symmetrical circular arc cuts, and the outer edge of the spring piece is a straight line, which facilitates adjustment of the deformation degree of the spring piece and thus controls the deformation curvature of the spring piece to achieve the best elastic effect.

[0030] When the vibration component is installed, the counterweight 21, the short strong magnetic strip 22 and the long strong magnetic strip 23 are tightly connected together by fixing screws, wherein the adjacent surfaces of the short strong magnetic strip 22 and the long strong magnetic strip 23 have the same polarity magnetism. After tightening the fixing screws, the two short strong magnetic strips can extend the magnetic field of the middle long strong magnetic strip 23 in the radial direction, thereby interacting with the magnetic field of the coil, reducing the overflow of the magnetic field, and thus forming a better vibration effect.

[0031] The housing preferably adopts a flat shape, that is, the height is relatively small, much smaller than the length and width. In addition, the short strong magnetic strip and the long strong magnetic strip also adopt a flat strip structure.

[0032] In other embodiments, the elastic support structure may further include a reinforcing sheet connected to the fixed end of the elastic sheet and the housing to improve the support strength.

[0033] In other embodiments, the sides of the short strong magnetic strip 22 and the long strong magnetic strip 23 may also be provided with through holes for passing fixing screws to achieve fixed connection.

[0034] The manufacturing method of the counterweight-type vibration device of the present invention includes the following assembly steps: first, using two fixing screws to fix the counterweight block, the short strong magnetic strip, the long strong magnetic strip, the short strong magnetic strip, and the counterweight block together from both sides in sequence to form a vibration component; embedding the coil into the hollow cavity from the upper opening of the shell; then inserting the vibration component into the coil from the outside of a through slot; then positioning the spring piece through the raised portion, fixing it to the shell with two fixing screws, and fixing it to the external connection side of the counterweight block with one screw.

[0035] More specifically, each step adopts an automatic installation method with an automatic conveying rail, with the upper opening of the shell facing upward, starting from the loading station: the first station is the loading station, where the shell is placed in a provided jig seat; the second station is to place the coil from the upper opening into the hollow cavity; the third station is to insert the vibration component from the outer side of the through slot into the coil in the hollow cavity using a pushing mechanism; the fourth station is to fix the two springs to the external connection sides of the shell and the counterweight block using a screw mechanism; the fifth station is the station for pasting veneer paper and PCB boards; the sixth station is the unloading station, where the product is taken out of the jig seat; wherein the jig seat is installed in a reciprocating slide rail, from the loading station to the unloading station; an up and down rotary conveying rail or a plane rotary conveying rail is used.

[0036] In summary, generally speaking, compared with the prior art, the beneficial effects of the present invention are as follows: the vibration component of the present invention adopts non-magnetic counterweight blocks at both ends, thereby limiting the magnetic field generated by the short strong magnetic strips and the long strong magnetic strips to a smaller range, so that the range of movement of the magnetic field of the vibration component during vibration is reduced, thereby reducing the impact on the coil, and having a better vibration effect. Furthermore, the counterweight block adopts a structure in which the thickness of the outer connection side is greater than that of the inner connection side, which can form a bevel structure and prevent the inner connection side from hitting the shrapnel. Further, a hollow groove is adopted to adjust the mass of the counterweight block by changing the size of the hollow groove to achieve different counterweight effects. An air-avoiding groove is provided inwardly, so that the outer shape is still a complete square structure, with a small overall space, beautiful appearance, and high structural strength. The upper opening is adopted to facilitate the installation of the coil, and the installation side groove is adopted to facilitate the embedding of the PCB board into the interior of the square structure, maintaining the square shape, beautiful appearance, and easy to achieve automated assembly. The assembly method of the vibration device of the present invention is suitable for using automated equipment to achieve automated assembly. The vibration device of the present invention can be widely used in small Bluetooth speakers, e-sports controllers, e-sports headphones, massagers, electric toys and other products.

[0037] The above examples are merely provided to further illustrate the technical content of the present invention for easier understanding by the reader, but do not limit the embodiments of the present invention to these examples. Any extension or re-creation of the technology based on the present invention is protected by the present invention. The scope of protection of the present invention shall be determined by the claims.

Claims

1. A counterweight vibration device, comprising a housing having a hollow cavity and a vibration assembly disposed in the hollow cavity; characterized in that The shell is provided with two elastic support structures located at both ends of the vibration component; the shell is also provided with a through groove for passing through the two ends of the vibration component and communicating with the hollow cavity; the vibration component includes two counterweights located at the ends, a short strong magnetic strip adjacent to the counterweight, a long strong magnetic strip located between the two short strong magnetic strips, and two fixing screws located on both sides that connect the counterweight, the short strong magnetic strip and the long strong magnetic strip together; it also includes two coils fixed to the inner wall of the hollow cavity and located at the outer periphery of the short strong magnetic strip and the long strong magnetic strip. The change in current conducted by the two coils causes a change in the magnetic field force to form a vibration of the vibration component in proportion to the current change; the counterweight is made of non-magnetic material.

2. The counterweight vibration device according to claim 1, characterized in that One side of the outer end of one of the counterweight blocks is an external connection side, which extends to the outside of the through slot and is fixedly connected to the elastic support structure, and the other side is an internal connection side, which is provided with a screw hole for passing the fixing screw; one side of the outer end of the other counterweight block is an internal connection side, which is provided with a screw hole for passing the fixing screw, and the other side is an external connection side, which extends to the outside of the through slot and is fixedly connected to the elastic support structure.

3. The counterweight vibration device according to claim 2, characterized in that The elastic supporting structure is a spring sheet, one end of which is fixedly connected to the shell, and the other end is fixedly connected to the outer connection side of the counterweight block; an escape groove for avoiding the spring sheet is provided on the outer side of the through slot.

4. The counterweight vibration device according to claim 2, characterized in that The thickness of the outer connecting side of the counterweight is more than twice the thickness of the inner connecting side.

5. The counterweight vibration device according to claim 4, characterized in that A hollow groove is provided in the middle of the counterweight block, and the size of the hollow groove is set according to the counterweight parameters.

6. The counterweight vibration device according to claim 5, characterized in that An elliptical through groove is provided at the center of the spring piece; and two screw holes are provided at one end of the spring piece fixedly connected to the shell.

7. The counterweight vibration device according to claim 6, characterized in that The sides of the short strong magnetic strip and the long strong magnetic strip are provided with open slots for passing fixing screws; the counterweight block is provided with a protrusion that matches the elliptical through slot for positioning during connection.

8. The counterweight vibration device according to claim 7, characterized in that The shell has a square structure; the hollow cavity is provided with an upper opening for the coil to be installed in the hollow cavity; the side of the upper opening is provided with a notch for passing the wire of the coil; the outside of the notch is provided with a mounting edge groove for embedded installation of a PCB board; the outside of the PCB board is provided with electrical contacts for connecting the wires.

9. The method for manufacturing the counterweight vibrating device according to claim 8, characterized in that The invention comprises the following assembly steps: first, using two fixing screws to fix the counterweight, the short strong magnetic strip, the long strong magnetic strip, the short strong magnetic strip, and the counterweight together from both sides in sequence to form the vibration component; embedding the coil into the hollow cavity from the upper opening of the shell; then inserting the vibration component into the coil from the outside of one of the through slots; then positioning the spring piece through the raised portion, fixing it to the shell with two fixing screws, and fixing it to the outer connection side of the counterweight with one screw.

10. The manufacturing method according to claim 9, characterized in that: Each step adopts an automatic installation method with an automatic conveying guide rail, with the upper opening of the shell facing upward, starting from the loading station: the first station is the loading station, where the shell is placed in a provided jig seat; the second station is to place the coil into the hollow cavity from the upper opening; the third station is to insert the vibration component from the outer edge of the through slot into the coil in the hollow cavity using a pushing mechanism; the fourth station is to fix the two springs to the external connection sides of the shell and the counterweight block using a screw mechanism; the fifth station is the station for veneer paper and PCB board pasting; the sixth station is the unloading station, where the product is taken out of the jig seat; wherein the jig seat is installed in a reciprocating slide rail, from the loading station to the unloading station; an up and down rotary conveying guide rail or a plane rotary conveying guide rail is used.

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