Vibration motor

Abstract

The invention provides a vibration motor, which comprises a rotor, a stator and an elastic piece, and is characterized in that the rotor comprises a cover plate, and the stator comprises a shell and an electromagnet; the cover plate and the shell are connected through an elastic piece and define a containing space. The electromagnet is contained in the containing space and comprises a winding, a first iron core, a second iron core and a third iron core, the first iron core, the second iron core and the third iron core are fixed to the shell, the second iron core and the third iron core are symmetrically arranged on the two sides of the first iron core at intervals in the first direction, and the winding surrounds the first iron core and is located between the second iron core and the third iron core; and after periodic current is introduced into the winding, the stator generates periodic magnetic attraction force to the mover, so that the mover moves along a second direction perpendicular to the first direction. The vibration motor is simple in structure and easy to assemble, the production requirement and the production cost are effectively reduced, and the vibration sense is controllable, so that different vibration sense experiences are realized, and the performance requirements of various scenes can be met.

Description

Technical Field

[0001] The invention relates to the field of vibration devices, and in particular to a vibration motor. Background Art

[0002] In the prior art, the more common vibration devices include linear motors and rotor motors. Among them, linear motors have more parts, and the structure and assembly process are extremely complicated. Therefore, the cost of linear motors in the prior art is relatively high. Although the structure of the rotor motor is simpler than that of the linear motor, the rotor motor responds slowly and has a weak high-frequency vibration sense, which makes it difficult to meet the performance requirements in most scenarios and is only suitable for application scenarios with low performance requirements.

[0003] Therefore, it is necessary to provide a vibration motor which has a simple structure, is easy to assemble, and can enhance vibration sensation. Summary of the invention

[0004] The object of the present invention is to provide a vibration motor to solve the technical problems in the prior art that the structure and assembly process of the vibration device are complex and the vibration sense is weak.

[0005] The technical solution of the present invention is as follows: The present invention provides a vibration motor, comprising: a mover, a stator and an elastic member, wherein the mover comprises a cover plate, and the stator comprises a shell and an electromagnet; the cover plate and the shell are connected and surrounded by the elastic member to form a receiving space; the electromagnet is received in the receiving space, and the electromagnet comprises a winding, and a first iron core, a second iron core and a third iron core respectively fixed to the shell, the second iron core and the third iron core are symmetrical in a first direction and are spaced apart on both sides of the first iron core, and the winding surrounds the first iron core and is located between the second iron core and the third iron core; When a periodic current is passed through the winding, the stator generates a periodic magnetic attraction force on the mover to make the mover move in a second direction perpendicular to the first direction.

[0006] Preferably, the shell includes a first shell portion, a second shell portion and a third shell portion, and the second shell portion and the third shell portion are symmetrically fixed to the first shell portion in a third direction perpendicular to the first direction and the second direction; the first iron core is fixed to the first shell portion, one end of the second iron core is fixed to the second shell portion and the other end is fixed to the third shell portion, and one end of the third iron core is fixed to the second shell portion and the other end is fixed to the third shell portion.

[0007] Preferably, the first shell portion is provided with a first plugging hole, the second shell portion is provided with two second plugging holes symmetrically arranged in the first direction, and the third shell portion is provided with a third plugging hole corresponding to the second plugging holes one by one; The first iron core comprises a first main body surrounded by the winding and a first plug-in portion protruding from the first main body, wherein the first plug-in portion is plugged into the first plug-in hole; The second core comprises a second body and two second plug-in parts symmetrically arranged on both sides of the second body in the third direction, and the two second plug-in parts are respectively inserted into one of the second plug-in holes and the corresponding third plug-in hole; The third core includes a third body and two third plug-in parts symmetrically arranged on both sides of the third body in the third direction, and the two third plug-in parts are respectively inserted into another second plug-in hole and the corresponding third plug-in hole.

[0008] Preferably, the shell is an integrally formed structure; or, the shell is a split structure, and the second shell portion and the third shell portion are respectively fixed to the first shell portion by a first fixing member.

[0009] Preferably, the vibration motor includes two elastic members symmetrically arranged in the first direction, the elastic member includes a first connecting portion, a second connecting portion extending from the middle of the first connecting portion, and a first protrusion arranged at the free end of the second connecting portion, one end of the first connecting portion is fixed to the second shell portion, and the other end is fixed to the third shell portion, and the first protrusion is convexly arranged on the side of the second connecting portion facing the cover plate and fixed to the cover plate.

[0010] Preferably, the first connecting portion is symmetrically formed with a second convex portion and a third convex portion at two ends of the third direction, and the second convex portion and the third convex portion are convexly arranged on a side of the first connecting portion facing the housing; A fourth plug-in portion is formed on the side of the second protrusion facing the shell, and a fifth plug-in portion is formed on the side of the third protrusion facing the shell, and fourth plug-in holes are symmetrically formed at both ends of the second shell in the first direction corresponding to the fourth plug-in portion, and fifth plug-in holes are symmetrically formed at both ends of the third shell in the first direction corresponding to the fifth plug-in portion; or, a fourth plug-in hole is formed on the side of the second protrusion facing the shell, and a fifth plug-in hole is formed on the side of the third protrusion facing the shell, and fourth plug-in portions are symmetrically formed at both ends of the second shell in the first direction corresponding to the fourth plug-in hole, and fifth plug-in portions are symmetrically formed at both ends of the third shell in the first direction corresponding to the fifth plug-in hole.

[0011] Preferably, the second shell portion comprises a first plate body and first columns symmetrically formed on both sides of the first plate body in the first direction, a first step surface abutting against the second convex portion is formed on a side of the first column facing the elastic member, and the fourth plug hole or the fourth plug portion is provided on the first step surface; The third shell portion includes a second plate body and second columns symmetrically formed on both sides of the second plate body in the first direction, the second column having a second step surface abutting against the third protrusion on one side facing the elastic member, and the fifth plug hole or the fifth plug portion is provided on the second step surface; The first and second columns are arranged in one-to-one correspondence, and the distance between the correspondingly arranged first and second columns is smaller than the distance between the first plate and the second plate; One end of the second iron core is fixed to the first plate body, and the other end is fixed to the second plate body. One end of the third iron core is fixed to the first plate body, and the other end is fixed to the second plate body.

[0012] Preferably, the shell is made of a strong magnetic conductive material; and / or the first iron core, the second iron core and the third iron core are made of a strong magnetic conductive material.

[0013] Preferably, said electromagnet comprises one or more said windings.

[0014] Preferably, at least one of the first core, the second core and the third core is formed by laminating multiple layers of iron sheets.

[0015] The beneficial effects of the present invention are as follows: the vibration motor of the present invention comprises a mover, a stator and an elastic member, the mover comprises a cover plate, the stator comprises a shell and an electromagnet; the cover plate and the shell are connected and surrounded by the elastic member to form a receiving space, the electromagnet is received in the receiving space, the electromagnet comprises a winding, and a first iron core, a second iron core and a third iron core respectively fixed to the shell, the second iron core and the third iron core are symmetrical in the first direction and are spaced apart on both sides of the first iron core, the winding surrounds the first iron core and is located between the second iron core and the third iron core, the structure is simple, easy to assemble, and the production requirements are effectively reduced and production costs; when a periodic current is passed through the winding, the stator generates a periodic magnetic attraction on the mover, and the magnetic attraction serves as an excitation source to cause the mover to move in a second direction perpendicular to the first direction. The vibration motor of the present invention has high space utilization and large magnetic attraction, and can provide a stronger vibration experience, with rapid response, no delay effect, and controllable vibration. Specifically, the vibration frequency of the mover can be changed by changing the frequency of the current, and the vibration amplitude of the mover can be changed by changing the amplitude of the current, thereby achieving different vibration experiences and meeting the performance requirements of various scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the vibration motor of the present invention.

[0017] Figure 2 for Figure 1 A front view of the vibration motor is shown.

[0018] Figure 3 for Figure 2 Right view of .

[0019] Figure 4 for Figure 3 AA cross-section diagram.

[0020] Figure 5 for Figure 1 An exploded view of the vibration motor is shown.

[0021] Figure 6 for Figure 5 An enlarged view of the stator structure in the vibration motor is shown.

[0022] Figure 7 for Figure 5 An enlarged view of the elastic structure in the vibration motor is shown.

[0023] Figure 8 for Figure 5 A schematic diagram of the vibration motor from another perspective is shown.

[0024] Fig. 9 for Figure 8 An enlarged view of the elastic structure in the vibration motor is shown.

[0025] Fig.10 for Figure 1 An exploded view of the stator structure of the vibration motor is shown.

[0026] Fig.11 for Fig.10 A schematic diagram of the stator from another perspective is shown.

[0027] Among them: 1- mover (11- cover plate), 2- stator (21- shell (211- first shell (2111- first plug hole), 212- second shell (2121- second plug hole, 2122- fourth plug hole, 2123- first plate, 2124- first column, 2125- first step surface), 213- third shell (2131- third plug hole, 2132- fifth plug hole, 2133- second plate, 2134- second column, 2135- second step surface)), 22- electromagnet (221- winding Group, 222-first iron core (2221-first main body, 2222-first plug-in part), 223-second iron core (2231-second main body, 2232-second plug-in part), 224-third iron core (2241-third main body, 2242-third plug-in part)), 3-elastic part (31-first connecting part, 32-second connecting part, 33-first convex part, 34-second convex part, 35-third convex part, 36-fourth plug-in part, 37-fifth plug-in part), 4-accommodating space, 5-first fixing part, 6-third fixing part. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0029] Please refer to Figures 1 to 11 , an embodiment of the present invention provides a mover 1, a stator 2 and an elastic member 3. The mover 1 includes a cover plate 11, and the stator 2 includes a housing 21 and an electromagnet 22. The cover plate 11 and the housing 21 are connected by the elastic member 3, and the cover plate 11 and the housing 21 are surrounded to form a receiving space 4. The electromagnet 22 is received in the receiving space 4, and the electromagnet 22 includes a winding 221, a first iron core 222, a second iron core 223 and a third iron core 224. The first iron core 222, the second iron core 223 and the third iron core 224 are respectively fixed to the housing 21, and the second iron core 223 and the third iron core 224 are symmetrically arranged on both sides of the first iron core 222 in the first direction, and there is a gap between the second iron core 223 and the first iron core 222, and there is a gap between the third iron core 224 and the first iron core 222. The winding 221 surrounds the first iron core 222, and the winding 221 is located between the second iron core 223 and the third iron core 224. When a periodic current is passed through the winding 221 , the stator 2 generates a periodic magnetic attraction force on the mover 1 so that the mover 1 moves in a second direction perpendicular to the first direction.

[0030] In the embodiments of the present invention, please refer to Figure 5The vibration motor includes a mover 1, a stator 2 and an elastic member 3. The mover 1 includes a cover plate 11, and the stator 2 includes a housing 21 and an electromagnet 22. The cover plate 11 and the housing 21 are connected and surrounded by the elastic member 3 to form a receiving space 4. The electromagnet 22 is received in the receiving space 4. The electromagnet 22 includes a winding 221, and a first iron core 222, a second iron core 223 and a third iron core 224 respectively fixed to the housing 21. The second iron core 223 and the third iron core 224 are symmetrical in the first direction and are arranged at intervals on both sides of the first iron core 222. The winding 221 surrounds the first iron core 222, and the winding 221 is located between the second iron core 223 and the third iron core 224. The structure is simple, the production cost is low, and it is easy to assemble and disassemble, which further reduces the production requirements and production costs. When a periodic current is passed through the winding 221, the stator 2 generates a periodic magnetic attraction on the mover 1, and the magnetic attraction acts as an excitation source to make the mover 1 move along the second direction. The vibration motor of the present invention has high space utilization and large magnetic attraction, can provide a stronger vibration experience, has a quick response, has no delay effect, and has controllable vibration. Specifically, by changing the frequency of the current, the vibration frequency of the mover 1 can be changed, and by changing the amplitude of the current, the vibration amplitude of the mover 1 can be changed, thereby achieving different vibration experiences and meeting the performance requirements of various scenarios. For example, the embodiments of the present invention can be applied to vehicles and other related fields.

[0031] Specifically, please refer to Figure 6 , Figure 8 and Fig.10 The housing 21 may include a first housing 211, a second housing 212 and a third housing 213, wherein the second housing 212 and the third housing 213 are symmetrically fixed to the first housing 211 in a third direction, wherein the third direction is perpendicular to the first direction and the second direction. As an example, the first direction may be an X direction, the second direction may be a Z direction, and the third direction may be a Y direction. Accordingly, the first core 222 is fixed to the first housing 211, one end of the second core 223 is fixed to the second housing 212, the other end of the second core 223 is fixed to the third housing 213, one end of the third core 224 is fixed to the second housing 212, and the other end of the third core 224 is fixed to the third housing 213. Not only is the structure simple and easy to assemble, but the second core 223 and the third core 224 are respectively fixed between the second housing 212 and the third housing 213, and the distance between the second housing 212 and the third housing 213 can also be effectively limited, so that the overall structure of the vibration motor is more stable.

[0032] As an example, when the winding 221 is energized with current, the stator 2 including the first core 222, the second core 223, the third core 224 and the first shell 211 forms a magnetic circuit with the mover 1 including the cover plate 11, and the stator 2 generates a magnetic attraction force on the mover 1, and the magnitude of the magnetic attraction force is positively correlated with the magnitude of the current. When a periodic current is passed, the stator 2 will generate a periodic magnetic attraction force on the mover 1, and the magnetic attraction force acts as an excitation source to move the mover 1 in the second direction. The vibration frequency can be changed by changing the frequency of the current, and the vibration amplitude can be changed by changing the amplitude of the current, thereby achieving different vibration experiences.

[0033] As an optional implementation, please refer to Fig.10 and Fig.11 The first shell 211 is provided with a first plug hole 2111, the second shell 212 is provided with two second plug holes 2121 symmetrically arranged in the first direction, and the third shell 213 is provided with a third plug hole 2131 corresponding to the second plug hole 2121. Accordingly, the first iron core 222 includes a first main body 2221 and a first plug part 2222 connected in one piece, the winding 221 surrounds the outside of the first main body 2221, the first plug part 2222 is protruded from the first main body 2221, and the first plug part 2222 is inserted into the first plug hole 2111. The second iron core 223 includes a second main body 2231 and two second plug parts 2232, and the two second plug parts 2232 are symmetrically arranged on both sides of the second main body 2231 in the third direction. One of the second plug-in parts 2232 is inserted into one of the second plug-in holes 2121, and the other second plug-in part 2232 is inserted into the third plug-in hole 2131 corresponding to the second plug-in hole 2121. The third iron core 224 includes a third body 2241 and two third plug-in parts 2242, and the two third plug-in parts 2242 are symmetrically arranged on both sides of the third body 2241 in the third direction. One of the third plug-in parts 2242 is inserted into the other second plug-in hole 2121, and the other third plug-in part 2242 is inserted into the third plug-in hole 2131 corresponding to the second plug-in hole 2121.

[0034] In this embodiment, the first iron core 222 is plugged into the first shell 211, the second iron core 223 is plugged into the second shell 212 and the third shell 213 respectively, and the third iron core 224 is plugged into the second shell 212 and the third shell 213 respectively, which facilitates the quick and accurate installation and positioning of the first iron core 222, the second iron core 223 and the third iron core 224 into the outer shell 21, and makes the connection relationship between the first shell 211, the second shell 212 and the third shell 213 more stable, which not only improves the assembly efficiency and assembly accuracy, but also further improves the stability of the vibration motor.

[0035] It should be noted that, in other embodiments, the first core 222 may also be installed and fixed to the first shell 211 by other means such as welding or screw connection. The second core 223 and the third core 224 may also be installed and fixed to the second shell 212 and the third shell 213 by other means such as welding or screw connection, and may be set according to actual conditions, which will not be described in detail here.

[0036] In some preferred embodiments, the shell 21 can be an integrally molded structure, that is, the first shell portion 211, the second shell portion 212 and the third shell portion 213 are an integral structure, which not only makes the structure of the shell 21 more stable, but also does not require assembly to form the shell 21, thereby reducing the assembly process and further improving the assembly efficiency.

[0037] In other preferred embodiments, the shell 21 can be a split structure, that is, the first shell portion 211, the second shell portion 212 and the third shell portion 213 are assembled to form the shell 21, which can reduce the difficulty of producing the parts of the shell 21 and make it easier to install the first iron core 222, the second iron core 223 and the third iron core 224 into the shell 21, thereby reducing the difficulty of assembly.

[0038] As an example, please refer to Figure 8 and Fig.10 , the second shell 212 can be fixed to the first shell 211 by the first fixing member 5, and the third shell 213 can be fixed to the first shell 211 by the first fixing member 5. For example, the first fixing member 5 can be a screw, the second shell 212 can be fixed to the first shell 211 by the screw, and the third shell 213 can also be fixed to the first shell 211 by the screw. Or, for example, the first fixing member 5 can be solder, the second shell 212 can be welded and fixed to the first shell 211, and the third shell 213 can also be welded and fixed to the first shell 211. It should be noted that the first fixing member 5 can also be other structures, and the fixing method of the second shell 212 to the first shell 211 and the fixing method of the third shell 213 to the first shell 211 can be the same or different, and can be set according to actual conditions, which will not be repeated here.

[0039] In some preferred embodiments, please refer to Figure 5 The vibration motor includes two elastic members 3, and the two elastic members 3 are symmetrically arranged in the first direction. Figure 7 and Fig. 9The elastic member 3 may be a spring sheet, and the elastic member 3 includes a first connection portion 31, a second connection portion 32, and a first convex portion 33 which are connected in sequence. The second connection portion 32 is formed by extending from the middle of the first connection portion 31, and the first convex portion 33 is provided at the free end of the second connection portion 32, that is, an end away from the first connection portion 31, and the first convex portion 33 is convexly provided at a side of the second connection portion 32 facing the cover plate 11. Among them, one end of the first connection portion 31 is fixed to the second shell portion 212, the other end of the first connection portion 31 is fixed to the third shell portion 213, and the first convex portion 33 is fixed to the cover plate 11, so that the cover plate 11 is suspended on the housing 21.

[0040] In this embodiment, the two elastic members 3 cooperate with each other, which can not only stably and effectively suspend the cover plate 11 on the housing 21, but also make the vibration motor structure more stable, and effectively improve the service life and reliability of the vibration motor. In addition, the elastic member 3 is fixed to the cover plate 11 through the first protrusion 33 protruding from the second connection part 32, which makes it easier to fix the elastic member 3 to the cover plate 11. The convex surface of the first protrusion 33 cooperates with the cover plate 11, which can avoid interference between other structures of the elastic member 3 and the cover plate 11, resulting in the inability to effectively connect the elastic member 3 and the cover plate 11, further improving the stability and reliability of the vibration motor.

[0041] As an example, the elastic member 3 may be fixed to the cover plate 11 by a second fixing member (not shown). For example, the second fixing member may be solder, and the elastic member 3 may be fixed to the cover plate 11 by welding. It should be noted that the second fixing member may also be other structures, which can be set according to actual conditions, and will not be described in detail here.

[0042] In some more preferred embodiments, please refer to Figure 7 and Fig. 9 The first connection part 31 is formed with a second protrusion 34 at one end in the third direction, and the first connection part 31 is formed with a third protrusion 35 at the other end in the third direction. The second protrusion 34 and the third protrusion 35 are symmetrically arranged with respect to the first connection part 31, and the second protrusion 34 and the third protrusion 35 are convexly arranged on the side of the first connection part 31 facing the housing 21. A fourth plug-in portion 36 is also formed on the second protrusion 34, the fourth plug-in portion 36 is formed on the side of the second protrusion 34 facing the housing 21, and the fourth plug-in portion 36 is convexly arranged on the second protrusion 34. A fifth plug-in portion 37 is also formed on the third protrusion 35, the fifth plug-in portion 37 is formed on the side of the third protrusion 35 facing the housing 21, and the fifth plug-in portion 37 is convexly arranged on the third protrusion 35.

[0043] Accordingly, please refer to Figure 6 and Fig.10The second shell 212 is provided with two fourth plug holes 2122, which are symmetrically provided at both ends of the second shell 212 in the first direction, one of the fourth plug holes 2122 is plugged with the fourth plug part 36 of one elastic member 3, and the other fourth plug hole 2122 is plugged with the fourth plug part 36 of the other elastic member 3. The third shell 213 is provided with two fifth plug holes 2132, which are symmetrically provided at both ends of the third shell 213 in the first direction, one of the fifth plug holes 2132 is plugged with the fifth plug part 37 of one elastic member 3, and the other fifth plug hole 2132 is plugged with the fifth plug part 37 of the other elastic member 3.

[0044] In this embodiment, the elastic member 3 is inserted into the fourth plug hole 2122 through the fourth plug portion 36 protruding from the second protrusion 34, and the elastic member 3 is also inserted into the fifth plug hole 2132 through the fifth plug portion 37 protruding from the third protrusion 35, thereby quickly and effectively restricting the elastic member 3 on the second shell portion 212 and the third shell portion 213, which not only improves the assembly accuracy, but also makes it easier to accurately and effectively fix the elastic member 3 to the second shell portion 212 and the third shell portion 213 in the subsequent process, thereby improving the assembly efficiency and further improving the stability of the outer shell 21.

[0045] As an example, the elastic member 3 can be fixed to the second shell 212 by the third fixing member 6, and the elastic member 3 can also be fixed to the third shell 213 by the third fixing member 6. For example, please refer to Figure 5 and Figure 8 As shown, the third fixing member 6 may be a screw. It should be noted that, in other embodiments, the third fixing member 6 may also be other structures, which may be configured according to actual conditions, and will not be described in detail here.

[0046] As an optional embodiment, the second shell 212 can be an integrally formed structure, and the second shell 212 includes a first plate 2123 and two first columns 2124 that are connected as one. The two first columns 2124 are symmetrically formed on both sides of the first plate 2123 in the first direction, and each first column 2124 is provided with a first step surface 2125 on the side facing the elastic member 3, and a fourth plug hole 2122 is provided on the first step surface 2125. The first step surface 2125 of one of the first columns 2124 of the second shell 212 abuts against the second convex portion 34 of one of the elastic members 3, and the first step surface 2125 of the other first column 2124 of the second shell 212 abuts against the second convex portion 34 of the other elastic member 3.

[0047] Similarly, the third shell 213 can also be an integrally formed structure, and the third shell 213 includes a second plate 2133 and two second columns 2134 connected in an integral manner. The second columns 2134 are symmetrically formed on both sides of the second plate 2133 in the first direction, and each second column 2134 is provided with a second step surface 2135 on the side facing the elastic member 3, and a fifth plug hole 2132 is provided on the second step surface 2135. The second step surface 2135 of one of the second columns 2134 of the third shell 213 abuts against the third convex portion 35 of one of the elastic members 3, and the second step surface 2135 of the other second column 2134 of the third shell 213 abuts against the third convex portion 35 of the other elastic member 3.

[0048] In this embodiment, the second shell portion 212 has a first step surface 2125, and the third shell portion 213 has a second step surface 2135, so that the elastic member 3 can be more accurately and effectively restricted on the outer shell 21, which not only further improves the assembly accuracy, but also makes it easier to accurately and effectively fix the elastic member 3 to the second shell portion 212 and the third shell portion 213 in the subsequent process, thereby improving the assembly efficiency and further improving the stability of the outer shell 21 and the product yield.

[0049] It should be noted that, in other embodiments, the fourth plug hole can be provided in the second protrusion 34, and the fifth plug hole can be provided in the third protrusion 35. Accordingly, the fourth plug part is formed in the second shell 212, and the fifth plug part is formed in the third shell 213. Specifically, the second protrusion 34 is provided with a fourth plug hole on the side facing the shell 21, and the third protrusion 35 is provided with a fifth plug hole on the side facing the shell 21. The second shell 212 is symmetrically formed with fourth plug parts corresponding to the fourth plug hole at both ends in the first direction, and the third shell 213 is symmetrically formed with fifth plug parts corresponding to the fifth plug hole at both ends in the first direction. As an optional embodiment, the fourth plug part is provided on the first step surface 2125, and the fifth plug part is provided on the second step surface 2135.

[0050] Furthermore, the first column 2124 of the second shell 212 and the second column 2134 of the third shell 213 are arranged in one-to-one correspondence, and the distance between the correspondingly arranged first column 2124 and second column 2134 is smaller than the distance between the first plate 2123 and the second plate 2133. One end of the second core 223 is fixed to the first plate 2123, and the other end of the second core 223 is fixed to the second plate 2133, and one end of the third core 224 is fixed to the first plate 2123, and the other end of the third core 224 is fixed to the second plate 2133.

[0051] In this embodiment, the distance between the corresponding first column 2124 and the second column 2134 is smaller than the distance between the first plate 2123 and the second plate 2133, which can prevent the second core 223 and the third core 224 from accidentally falling off from the shell 21, further improving the stability of the shell 21 and the product yield.

[0052] As an example, please refer to Figure 8 , Fig.10 and Fig.11 The first fixing member 5 may be a screw, which may pass through the first shell 211 and be screwed into the first column 2124 of the second shell 212 or into the second column 2134 of the third shell 213, thereby effectively fixing the first shell 211, the second shell 212 and the third shell 213 to form the housing 21. Figure 1 , Figure 5 , Figure 6 and Figure 8 The third fixing member 6 can be a screw, and the third fixing member 6 can pass through the elastic member 3 and be screwed into the first column 2124 of the second shell 212 or screwed into the second column 2134 of the third shell 213, thereby effectively fixing the elastic member 3 to the shell 21.

[0053] In some preferred embodiments, the housing 21 is made of a strong magnetic conductive material.

[0054] In some preferred embodiments, the first iron core 222, the second iron core 223 and the third iron core 224 are made of strong magnetic conductive materials.

[0055] In some embodiments, Fig.10 and Fig.11 As shown, the electromagnet 22 may include a winding 221. In some other embodiments, the electromagnet 22 may include a plurality of windings 221. As an example, the plurality of windings 221 may be coaxially arranged and sequentially sleeved outside the first core 222.

[0056] In some embodiments, the first core 222 may be formed by laminating multiple layers of iron sheets to reduce eddy current loss. It should be noted that in other embodiments, the first core 222 may also be an integrally formed structure, which may be configured according to actual conditions and will not be described in detail herein.

[0057] In some embodiments, the second core 223 may be formed by laminating multiple layers of iron sheets, thereby reducing eddy current loss. It should be noted that in other embodiments, the second core 223 may also be an integrally formed structure, which may be configured according to actual conditions, and will not be described in detail here.

[0058] In some embodiments, the third core 224 may be formed by laminating multiple layers of iron sheets, thereby reducing eddy current loss. It should be noted that in other embodiments, the third core 224 may also be an integrally formed structure, which may be configured according to actual conditions, and will not be described in detail herein.

[0059] The above description is only an implementation mode of the present invention. It should be pointed out that, for ordinary technicians in this field, improvements can be made without departing from the creative concept of the present invention, but these all belong to the protection scope of the present invention.

Claims

1. A vibration motor, characterized in that: include: A mover, a stator and an elastic member, wherein the mover comprises a cover plate, and the stator comprises a housing and an electromagnet; the cover plate and the housing are connected and surrounded by the elastic member to form a receiving space; The electromagnet is accommodated in the accommodation space, and includes a winding, and a first iron core, a second iron core, and a third iron core respectively fixed to the housing, the second iron core and the third iron core are symmetrical in the first direction and are arranged at intervals on both sides of the first iron core, and the winding surrounds the first iron core and is located between the second iron core and the third iron core; When a periodic current is passed through the winding, the stator generates a periodic magnetic attraction force on the mover to make the mover move in a second direction perpendicular to the first direction.

2. The vibration motor according to claim 1, wherein: The shell includes a first shell portion, a second shell portion and a third shell portion, the second shell portion and the third shell portion are symmetrically fixed to the first shell portion in a third direction perpendicular to the first direction and the second direction; the first iron core is fixed to the first shell portion, one end of the second iron core is fixed to the second shell portion and the other end is fixed to the third shell portion, and one end of the third iron core is fixed to the second shell portion and the other end is fixed to the third shell portion.

3. The vibration motor according to claim 2, characterized in that The first shell portion is provided with a first plugging hole, the second shell portion is provided with two second plugging holes symmetrically arranged in the first direction, and the third shell portion is provided with a third plugging hole corresponding to the second plugging holes one by one; The first iron core comprises a first main body surrounded by the winding and a first plug-in portion protruding from the first main body, wherein the first plug-in portion is plugged into the first plug-in hole; The second core comprises a second body and two second plug-in parts symmetrically arranged on both sides of the second body in the third direction, and the two second plug-in parts are respectively inserted into one of the second plug-in holes and the corresponding third plug-in hole; The third core includes a third body and two third plug-in parts symmetrically arranged on both sides of the third body in the third direction, and the two third plug-in parts are respectively inserted into another second plug-in hole and the corresponding third plug-in hole.

4. The vibration motor according to claim 2, characterized in that The shell is an integrally formed structure; or, the shell is a split structure, and the second shell part and the third shell part are respectively fixed to the first shell part by a first fixing member.

5. The vibration motor according to claim 2, wherein: The vibration motor includes two elastic members symmetrically arranged in the first direction, and the elastic member includes a first connecting portion, a second connecting portion extending from the middle of the first connecting portion, and a first protrusion arranged at the free end of the second connecting portion, one end of the first connecting portion is fixed to the second shell portion, and the other end is fixed to the third shell portion, and the first protrusion is convexly arranged on the side of the second connecting portion facing the cover plate and fixed to the cover plate.

6. The vibration motor according to claim 5, characterized in that The first connecting portion is symmetrically formed with a second convex portion and a third convex portion at two ends of the first connecting portion in the third direction, and the second convex portion and the third convex portion are convexly arranged on a side of the first connecting portion facing the housing; A fourth plug-in portion is formed on the side of the second protrusion facing the shell, and a fifth plug-in portion is formed on the side of the third protrusion facing the shell, and fourth plug-in holes are symmetrically formed at both ends of the second shell in the first direction corresponding to the fourth plug-in portion, and fifth plug-in holes are symmetrically formed at both ends of the third shell in the first direction corresponding to the fifth plug-in portion; or, a fourth plug-in hole is formed on the side of the second protrusion facing the shell, and a fifth plug-in hole is formed on the side of the third protrusion facing the shell, and fourth plug-in portions are symmetrically formed at both ends of the second shell in the first direction corresponding to the fourth plug-in hole, and fifth plug-in portions are symmetrically formed at both ends of the third shell in the first direction corresponding to the fifth plug-in hole.

7. The vibration motor according to claim 6, characterized in that The second shell portion includes a first plate body and first columns symmetrically formed on both sides of the first plate body in the first direction, a first step surface abutting against the second convex portion is formed on a side of the first column facing the elastic member, and the fourth plug hole or the fourth plug portion is provided on the first step surface; The third shell portion includes a second plate body and second columns symmetrically formed on both sides of the second plate body in the first direction, the second column having a second step surface abutting against the third protrusion on one side facing the elastic member, and the fifth plug hole or the fifth plug portion is provided on the second step surface; The first and second columns are arranged in one-to-one correspondence, and the distance between the correspondingly arranged first and second columns is smaller than the distance between the first plate and the second plate; One end of the second iron core is fixed to the first plate body, and the other end is fixed to the second plate body. One end of the third iron core is fixed to the first plate body, and the other end is fixed to the second plate body.

8. The vibration motor according to claim 1, wherein: The shell is made of a strong magnetic conductive material; and / or the first iron core, the second iron core and the third iron core are made of a strong magnetic conductive material.

9. The vibration motor according to claim 1, wherein: The electromagnet comprises one or more of the windings.

10. The vibration motor according to claim 1, wherein At least one of the first core, the second core and the third core is formed by laminating multiple layers of iron sheets.

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